Electrical property measuring apparatus for pressure sensor and measuring method thereof

This application claims the priority benefit of Taiwan application serial no. 100149866, filed Dec. 30, 2011. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.

The disclosure relates to an electrical property measuring apparatus and a method thereof, and more particularly to an electrical property measuring apparatus and method for pressure sensor.

In recent technology of calibrating pressure sensors with a large area, a pressing unit having a rigid structure is often used to directly press on the sensor having a plurality of sensing units, wherein the uniformity of the pressing force of the pressing unit depends on the planarity of the contacting area between the pressing unit and the pressure sensor. As for the rigid structure, the larger the contacting area, it is more difficult to obtain a good planarity, i.e., the worse the planarity would become.

Accordingly, the pressing unit composed of rigid structure needs a very high fabricating cost to have a good planarity, otherwise it would lead to a bad uniformity of pressure due to the bad planarity during pressing process. Both of the ways mentioned above cannot effectively solve the issue of calibrating pressure sensors having a large area.

The disclosure provides an electrical property measuring apparatus for pressure sensor including a first plate and a second plate being opened or closed relative to each other; an object to be measured disposed between the first plate and the second plate; an electrical property measuring unit for measuring an electrical property signal of the object; and a fluid supplying system connected to a space formed by the first plate or the second plate with a pressed surface, the fluid supplying system provides a fluid to the space so that the fluid presses on the object and the electrical property measuring unit measures the electrical property signal of the object.

The disclosure further provides a method of measuring electrical property for pressure sensor including providing a first plate and a second plate; providing an object to be measured disposed between the first plate and the second plate; closing the first plate and the second plate so that a space is formed between a pressed surface and the first plate, or a space is formed between a pressed surface and the second plate; providing a fluid to the space through a fluid supplying system; detecting a fluid pressure variation within the space with a fluid pressure detector; pressing on the object with the fluid; and measuring an electrical property signal transmitted by the object due to a fluid pressure.

In order to make the aforementioned and other features and advantages of the disclosure more comprehensible, embodiments accompanying figures are described in detail below.

The accompanying drawings constituting a part of this specification are incorporated herein to provide a further understanding of the disclosure. Here, the drawings illustrate embodiments of the disclosure and, together with the description, serve to explain the principles of the disclosure.

FIG. 1A is a schematic view of an electrical property measuring apparatus for pressure sensor according to an embodiment of the disclosure.

FIG. 1B schematically shows another status of FIG. 1A .

FIG. 1C to FIG. 1E schematically illustrates the embodiments of the pressure sensor of the disclosure.

FIG. 2 is a flow chart illustrating the method of electrical property measuring for pressure sensor of FIG. 1A and FIG. 1B .

FIG. 3A and FIG. 3B are schematic views respectively illustrating an electrical property measuring apparatus in different statuses according to another embodiment of the disclosure.

FIG. 4A and FIG. 4B are schematic views respectively illustrating an electrical property measuring apparatus in different statuses according to another embodiment of the disclosure.

FIG. 4C is a schematic top view of the object located on the electrical property measuring apparatus of FIG. 4A .

FIG. 5A is a schematic view of an electrical property measuring apparatus according to another embodiment of the disclosure.

FIG. 5B is a partially side view of the electrical property measuring apparatus of FIG. 5A .

FIG. 6A is a partial schematic view of an electrical property measuring apparatus according to another embodiment of the disclosure.

FIG. 6B is a perspective view of the second plate of FIG. 6A .

FIG. 6C and FIG. 6D respectively show side views of the second plate of the electrical property measuring apparatus of FIG. 6A .

FIG. 7 is a three-dimensional schematic view of an electrical property measuring apparatus for pressure sensor of the disclosure.

Descriptions of the disclosure are given with reference to the embodiments illustrated with accompanied drawings wherein same or similar parts are denoted with same reference numerals. However, it is not limited thereto, and the same parts can also be denoted with different numerals.

The disclosure provides an electrical property measuring apparatus for pressure sensor and a method thereof to measure electrical property of pressure sensors having different area.

FIG. 1A is a schematic view of an electrical property measuring apparatus for pressure sensor according to an embodiment of the disclosure. FIG. 1B schematically shows another status of FIG. 1A . Referring to FIG. 1A and FIG. 1B together, the electrical property measuring apparatus 100 for pressure sensor includes a first plate 110 , a second plate 120 , a flexible element 130 , an object 140 to be measured, a fluid supplying system 150 , a fastening assembly 160 , a sealing element 170 , a controller 180 and an electrical property measuring unit 190 . The second plate 120 is a fixed supporting platform, for example, and the object 140 is disposed on the second plate 120 . Wherein the object 140 includes one pressure sensor, a plurality of pressure sensors, or a plurality of pressure sensor array arranged on a flexible element, wherein the plurality of pressure sensors are formed by being connected to each other and disposing on the flexible element. However, it should not be construed as limited to the embodiment set forth herein.

The first plate 110 is able to be opened or closed relative to the second plate 120 . When the first plate 110 and the second plate 120 are closed, the flexible element 130 clipped between the first plate 110 and the second plate 120 , so that a space C 1 is formed by the first plate 110 and a pressed surface, or a space C 1 is formed by the second plate 120 and a pressed surface, such that the space C 1 separates the object 140 from a fluid. Wherein the fluid can be a gas or a liquid.

In one embodiment of the disclosure, the pressed surface can be the surface of the flexible element 130 .

In one embodiment of the disclosure, the surface of the flexible element 130 can be larger than the surface of the space C 1 . And the surface of the object 140 is smaller than the surface of the space C 1 .

The fluid supplying system 150 can be connected to the space C 1 through a first piping 151 and a second piping 153 , and an inlet valve 152 is disposed at the first piping 151 located at an inlet of the space C 1 , and an outlet valve 154 is disposed at the second piping 153 located at an outlet of the space C 1 , so that the controller 180 controls the fluid supplying system 150 to output the fluid to enter the space C 1 and to drain the fluid to leave the space C 1 . In the embodiment, a gas is used as a medium of the fluid for entering or leaving the space C 1 in the electrical property measuring apparatus 100 for pressure sensor, and thus the related components and structures are designed according to the property of gas, but the disclosure is not limited thereto. The structures of the electrical property measuring apparatus for pressure sensor can be correspondingly designed according to actual requirements by using the fluid with different properties. Wherein the space C 1 is a hermetically sealed space for a fluid passing through.

The first plate 110 has a first flow path L 1 and a second flow path L 2 , wherein the first flow path L 1 and a second flow path L 2 are disposed at two sides of the first plate 110 respectively. The first flow path L 1 is connected to the inlet valve 152 and the second flow path L 2 is connected to the outlet valve 154 , so as to control the fluid to enter the space C 1 through the inlet valve 152 and the first flow path L 1 and leave the space C 1 through the outlet valve 154 and the second flow path L 2 . The principle of the motion is described later.

In one embodiment, a first recess 112 is formed on the first plate 110 , and the second plate 120 can be a supporting platform. In another embodiment, a second recess 122 is formed on the second plate 120 , and the first plate 110 can be a supporting platform. Or further, in another embodiment, a first recess 112 and a second recess 122 are corresponding formed on the first plate 110 and the second plate 120 respectively. That is to say, a supporting plate 124 is disposed on the first recess 112 or the second recess 122 to support the object 140 . In the embodiment, the first recess 112 is formed on the first plate 110 , and the second recess 122 is formed on the second plate 120 , and the supporting plate 124 is disposed on the second recess 122 to make a supporting platform for supporting the object 140 . However, the spirit of the disclosure should not be construed as limited to the embodiment set forth herein.

When the first plate 110 and the second plate 120 are closed, the fastening assembly 160 can be used for fixing the first plate 110 to the second plate 120 . The fastening assembly 160 can be screws and nuts, bolts and nuts, or the internal threads of the second plate 120 being screwed with bolts or screws, or any other suitable elements. In the embodiment, bolts or screws pass through the holes 118 of the first plate 110 and are fastened to the threads 126 of the second plate 120 . However, the spirit of the disclosure should not be construed as limited to the embodiment set forth herein.

In order to hermetically seal and prevent leakage of the fluid, an annular trench 116 is disposed at the peripheral of the first recess 112 or the second recess 122 . The sealing element 170 is configured in the annular trench 116 , so that when the first plate 110 and the second plate 120 are closed the sealing element 170 can act as a damper and enhance the sealing effect. The sealing element 170 can be a rubber, a polymer or other annular thin element in equivalent materials. The first recess 112 , the second recess 122 , the annular trench 116 and the sealing element 170 can be designed to have the same geometrical shapes, e.g., rectangular, circular, square or the like. The cross-sectional of the sealing element 170 can be circular, rectangular or the like. Wherein, the area of the flexible element 130 is larger than the area of the sealing element 170 .

The flexible element 130 can be a thin film having flexibility, elasticity, gas barrier property or the material of a combination thereof. For example, the thin film can be made of a polycarbonate (PC) material. This material is one of the materials described in the embodiment, and the disclosure should not be construed as limited to this material and any other suitable materials having the same or similar property are still within the scope of the disclosure.

The fluid supplying system 150 includes a pump 156 and a fluid tank 158 . The fluid in the fluid tank 158 is output by the pump 156 and transmitted into the space C 1 through the first piping 151 , the first flow path L 1 and the inlet valve 152 . And the fluid in the space C 1 is then returned into the fluid tank 158 through the second flow path L 2 , the outlet valve 154 and the second piping 153 . Wherein the first flow path L 1 and the second flow path L 2 can be one or more flow paths which are respectively connected to the first piping 151 and the second piping 153 , and the disclosure is not limited thereto. The fluid used in the embodiment is a gas, for example. In one embodiment, the gas can be voided to the external environment through the outlet valve 154 , and the gas is unnecessary to return into the fluid tank 158 , and the disclosure is not limited thereto.

A fluid pressure detector 114 is disposed in the space C 1 for detecting a fluid pressure variation within the space C 1 . The object 140 can be classified into a measuring area R 1 and a wiring connecting area R 2 surrounding the measuring area R 1 . The pressure sensor to be measured of the object 140 is located in the measuring area R 1 . The object 140 includes one or a plurality of pressure sensors or a pressure sensor array arranged and electrically connected to the wiring connecting area R 2 respectively, and the wiring connecting area R 2 is connected to one or a plurality of wires 128 . In one embodiment, when the first plate 110 and the second plate 120 are closed, the measuring area R 1 and the wiring connecting area R 2 are located within the space C 1 , and the fluid may exert a pressure to the object 140 located in the measuring area R 1 through the flexible element 130 . Then, the electrical property signal generated by the object 140 due to the pressure is transmitted to the wiring connecting area R 2 and then to the electrical property measuring unit 190 through the wires 128 . Accordingly, the wires 128 can be connected to the hole 121 of the second plate 120 , and since the flexible element 130 separates the fluid, the bother of fluid leaking out of the space C 1 can be avoided. In other words, a structure design of the pressing terminal and the measuring terminal being independent is used in this embodiment.

Additionally, the wires 128 located in the wiring connecting area R 2 are correspondingly and electrically connected to the object 140 . Thus, when the electrical property of one of the pressure sensors of the object 140 is measured, the rest of the pressure sensors which are not measured are electrically grounded. This is one of the exemplary embodiments, but the spirit of the disclosure should not be construed as limited to the embodiment set forth herein.

An electrical connecting way of one pressure sensor or a plurality of pressure sensors are described in the following. FIG. 1C to FIG. 1E schematically illustrates the embodiments of the pressure sensor of the disclosure. As shown in FIG. 1C , if the object 140 is one pressure sensor being measured, two wires, one positive and one negative, can be coupled to the electrical property measuring unit 190 .

As shown in FIG. 1D , if the object 140 is many pressure sensors being measured, each of the pressures can have two wires, one positive and one negative, to be coupled to the electrical property measuring unit 190 .

As shown in FIG. 1E , if the object 140 is a pressure sensor array being measured, the electrical property measuring unit 190 can be set to have a certain pressure sensor to be measured. For example, if the pressure sensor at X 1 Y 1 position is to be measured, then the rest of the pressure sensors are electrically grounded, which means that one of the X 1 or Y 1 wire is selected to be connected to the ground and the other is connected to the electrical property measuring unit 190 , and all of the X 2 , X 3 , X 4 , Y 2 , Y 3 , Y 4 are connected to the ground.

In one embodiment, one or more pressure sensors can be disposed on a flexible thin film 141 .

In one embodiment, a hole 121 can be disposed at the second plate 120 , and an end of each of the wires 128 can pass through the hole 121 and connected to the wiring connecting area R 2 , and the other end of the wires can be connected to the electrical property measuring unit 190 .

In one embodiment, the wires 128 can also be directly connected from the position between the first plate 110 and the second plate 120 to the electrical property measuring unit 190 .

The electrical property measuring unit 190 of the disclosure can be a microprocessor capable of memorizing and calculating data of various electrical properties and using a predetermined pressure value to calibrate and adjust the pressure sensor of the object with a good reliability and accuracy.

The controller 180 of the disclosure is electrically connected to the fluid supplying system 150 , the fluid pressure detector 114 , the inlet valve 152 , the outlet valve 154 and the electrical property measuring unit 190 respectively, and controls the procedures of inlet and outlet of the fluid from the space C 1 through the above mentioned components and electrical property measurements, and the details are described later.

FIG. 2 is a flow chart illustrating the method of electrical property measuring for pressure sensor of FIG. 1A and FIG. 1B . Referring to FIG. 1A , FIG. 1B and FIG. 2 together, a gas is used as the fluid in the embodiment. First, in step S 310 , the object 140 is disposed on the supporting platform of the second plate 120 . In step S 320 , the first plate 110 and the second plate 120 are closed, the first plate 110 and the second plate 120 are fastened by using the fastening assembly 160 , so that the first plate 110 and a pressed surface form a space C 1 , (or the second plate 120 and a pressed surface form a space C 1 ), and the object 140 is located in the space C 1 , and the flexible element 130 is clipped between the first plate 110 and the second plate 120 and the object 140 is separated from a fluid by the flexible element 130 . The wires 128 are electrically connected to the object 140 and the electrical property measuring unit 190 respectively. And then, in step S 330 , the controller 180 is operated to output a signal to open the inlet valve 152 and to close the outlet valve 154 , and the pump 156 of the fluid supplying system 150 is actuated to bring the fluid in the fluid tank 158 into the space C 1 through the inlet valve 152 and the first flow path L 1 . In step S 340 , when the fluid pressure in the space C 1 reaches a predetermined value, the fluid pressure detector 114 within the space C 1 may transmit a signal to the controller 180 , at this time the controller 180 closes the inlet valve 152 and the pump 156 to stop providing the fluid (or the pump 156 may not be closed), and the electrical property measuring unit 190 is actuated for measuring the electrical property of the object 140 . In step S 350 , when the electrical property measuring unit 190 is actuated and the electrical signal variation, e.g., change of resistance, voltage, current, capacitance, inductance or the like, generated by the object 140 due to the fluid pressure is measured, in order to obtain the electrical property of the object and then it is turned into the pressure sensing property to achieve the current pressure sensing property of the object 140 . After the electrical property measuring unit 190 finishes the measurement, a signal is transmitted to the controller 180 .

And then, in step S 360 , after the electrical property of the object 140 is measured and the controller 180 receives the signal that the electrical property measuring unit 190 finishes the measurement, the controller 180 may close the inlet valve 152 and the pump 156 first, and the outlet valve 154 is opened, so that the fluid is output from the space C 1 and brought into the fluid tank 158 from the outlet valve 154 through the second flow path L 2 . In one embodiment, the fluid tank 158 is not necessary, and the gas can also be inlet or outlet in the circumstance through the pump 156 to obtain the same function. Finally, in step S 370 , when the fluid pressure in the space C 1 is decreased to a predetermined value (e.g., equal to the pressure of the external environment), the fluid pressure detector 114 in the space C 1 may send a signal to the controller 180 , and then after the controller 180 closes the outlet valve 154 and the pressure within the space C 1 is released, the first plate 110 can be opened and the object 140 can be taken out. In the step of another embodiment, the controller 180 may not close the outlet valve 154 and the gas can be directly output to the external environment. Since when the pressure within the space C 1 is equal to the external pressure, the first plate 110 and the second plate 120 can be conveniently opened. Wherein the fluid pressure detector 114 has a display to show the pressure values.

It has to be noted that, the electrical signal generated by the object 140 due to the fluid pressure includes at least one of the resistance, voltage, current, capacitance, inductance or a combination thereof, after measured by the electrical property measuring unit 190 and the signals of the object 140 are further calibrated so that the pressure sensor of the object 140 can have a good reliability and accuracy.

In the embodiment, since the fluid pressure in the space C 1 is detected by means of the object 140 contacting with the flexible element 130 , the object 140 has not to be in the sealed space C 1 , i.e., the object 140 has not to be disposed in the fluid. Accordingly, the condition of the wires 128 having to be pulled directly out of the fluid within the space C 1 can be avoided. And thus, the electrical property measuring apparatus 100 of the embodiment can effectively reduce the difficulty in pressure sensor measurement. In other words, the pressing terminal (i.e., the fluid inletting the space C 1 ) and the measuring terminal (i.e., the electrical property measuring unit 190 and the object 140 ) are designed to be independent, and thus the fluid leakage during measurement can be prevented.

FIG. 3A and FIG. 3B are schematic views respectively illustrating an electrical property measuring apparatus in different statuses according to another embodiment of the disclosure. Referring to FIG. 3A and FIG. 3B together, the structures are mainly the same to FIG. 1A and FIG. 1B , and the difference from the above mentioned embodiment is illustrated as follows: In the electrical property measuring apparatus 100 of the embodiment, the flexible element 130 can be a bag disposed within the first recess 112 of the first plate 110 and connected to the fluid supplying system 150 by respectively passing through the first flow path L 1 and the second flow path L 2 through the inlet valve 152 and the outlet valve 154 , and thus when the inlet valve 152 and the outlet valve 154 are closed the internal space of the bag may become a bag space C 2 . When the fluid supplying system 150 transmits the fluid into the bag, it leads to deformation and inflation of the bag, so as to press on the object 140 to achieve the effect similar to the above mentioned embodiment of the fluid pressure within the bag space C 2 of the object 140 being detected by the thin film.

When the first plate 110 and the second plate 120 are closed, so that the first plate 110 or the second plate 120 and the pressed surface form a space C 1 and separates the object 140 from a fluid.

In one embodiment, the pressed surface can be the internal surface of the bag.

The rest of the components are similar in structures, and it is not repeated thereto.

FIG. 4A and FIG. 4B are schematic views respectively illustrating an electrical property measuring apparatus in different statuses according to another embodiment of the disclosure. Referring to FIG. 4A and FIG. 4B together, the structures are mainly similar to the FIG. 1A and FIG. 1B , and the difference from the above mentioned embodiment is illustrated as follows: In the electrical property measuring apparatus 100 of the embodiment, the object 140 is disposed on the support platform of the second plate 120 , i.e., the second plate 120 has designed with no recess disposed thereon, and the first plate 110 is disposed a first recess 112 thereon. No flexible element 130 is designed in the present embodiment. The sealing element 170 disposed at the peripheral of the first recess 112 of the first plate 110 can be, for example, an O-ring. When the first plate 110 and the second plate 120 are closed, the sealing element 170 is located between the first plate 110 and the second plate 120 , and located at the peripheral of the space C 1 , and the object 140 is clipped by the sealing element 170 . In other words, the orthogonal projection area of the object 140 onto the second plate 120 is larger than the orthogonal projection area of the sealing element 170 onto the second plate 120 in the embodiment, i.e., the area of the object 140 is larger than the area of the sealing element 170 . When the first plate 110 and the second plate 120 are closed, the sealing element 170 may clip the object 140 so that a portion of the object 140 is located outside the sealing element 170 . Wherein the area of the object 140 is greater than the area of the space C 1 .

The object 140 can be classified into a measuring area R 1 and a wiring connecting area R 2 surrounding the measuring area R 1 . The object 140 includes one or a plurality of pressure sensors or pressure sensor array electrically connected to the wiring connecting area R 2 respectively, and the wiring connecting area R 2 is connected to one or a plurality of wires 128 . In one embodiment, when the first plate 110 and the second plate 120 are closed, the measuring area R 1 is located in the range of sealing element 170 , and the wiring connecting area R 2 is located outside the sealing element 170 , and the fluid may exert a pressure to the object 140 located in the measuring area R 1 . Then, the electrical property signal generated by the object 140 due to the pressure is transmitted to the wiring connecting area R 2 and then to the electrical property measuring unit 190 through the wires 128 . Accordingly, the condition of the wires 128 having to be pulled directly out of the fluid within the space C 1 and the fluid leakage out of the space C 1 can be avoided. In other words, a structure design of the pressing terminal and the measuring terminal being independent is used in the present embodiment.

Additionally, the wires 128 located in the wiring connecting area R 2 are correspondingly and electrically connected to the object 140 . Thus, when the electrical property of one of the pressure sensors of the object 140 is measured, the rest of the pressure sensors which are not measured are electrically grounded. The embodiment can be referred to FIG. 1C to FIG. 1E .

In addition, the connection between the wiring connecting area R 2 and the electrical property measuring unit 190 is not limited in the disclosure. In the embodiment, when the first plate 110 and the second plate 120 are closed, since both the object 140 and the wires 128 are flexible so as to bear the closing pressure of the first plate 110 and the second plate 120 without affecting the function of the electrical connection, and the wires 128 are extended from the position between the first plate 110 and the second plate 120 and connected to the electrical property measuring unit 190 .

In one embodiment, the pressed surface can be the surface of the object 140 .

FIG. 4C is a schematic top view of the object located on the electrical property measuring apparatus of FIG. 4A . Referring to FIG. 4A to FIG. 4C , in the embodiment, the object 140 has a measuring area 142 (the same as the measuring area R 1 mentioned above) and a wire connecting area 144 (the same as the wiring connecting area R 2 ), and the electrical property measuring unit 190 is electrically connected to the wire connecting area 144 . In other words, since the space C 1 of the embodiment is formed by the first plate 110 and the second plate 120 , the fluid may press on a portion of the object 140 , i.e., in the region of measuring area 142 . The sealing element 170 defines and separates the measuring area 142 located in the center and the wire connecting area 144 surrounding the measuring area 142 by means of pressing on the object 140 . When the electrical property measuring apparatus 100 of the embodiment is used, measuring area 142 and wire connecting area 144 with different areas can be designed according to required areas to be measured. And thus, the design and function of the pressing terminal and the measuring terminal of the electrical property measuring apparatus 100 being independent can be obtained.

The rest of the components are similar in structures, and it is not repeated thereto.

FIG. 5A is a schematic view of an electrical property measuring apparatus according to another embodiment of the disclosure. FIG. 5B is a partially side view of the electrical property measuring apparatus of FIG. 5A . Referring to FIG. 5A and FIG. 5 B together, in the embodiment, a machine 200 is provided. The machine 200 includes a power module 210 , a stage 220 , a driver 230 , and an operating station 240 . The power module 210 includes an oil-pressure cylinder, a motor, a gear set, a circuit, a controller and so on. The power module 210 is connected to the driver 230 and the first plate 110 is connected to the bottom of the driver 230 , and the second plate 120 is disposed on the stage 220 , and the operating station 240 is disposed at a side of the stage 220 . When the operating station 240 actuates the power module 210 , and the power module 210 drives the driver 230 to drive the first plate 110 to move back and forth relative to the second plate 120 , i.e., the opening or closing actions of the first plate 110 and the second plate 120 . Thus, the power module 210 can actuate the first plate 110 and the second plate 120 to be closed so as to maintain the required pressing force of the space C 1 located between the first plate 110 and the second plate 120 , and this function is the same as the effect of the fastening assembly 160 of the previous mentioned embodiment. The structures of the first plate 110 and the second plate 120 of this embodiment is similar to the first embodiment mentioned above, and thus it is not repeated herein. Accordingly, any available technique which teaches the connecting structure for maintaining the first plate 110 and the second plate 120 to be opened or closed can be used in this disclosure.

The rest of the components are similar in structures, and it is not repeated thereto.

FIG. 6A is a partial schematic view of an electrical property measuring apparatus according to another embodiment of the disclosure. A portion of the second plate is described herein. FIG. 6B is a perspective view of the second plate of FIG. 6A . FIG. 6C and FIG. 6D respectively show side views of the second plate of the electrical property measuring apparatus of FIG. 6A . The electrical property measuring apparatus used to measure different area of the object is illustrated. Referring to FIG. 6A to FIG. 6D , the structures are mainly similar to the FIG. 1A , FIG. 1B , FIG. 4A and FIG. 4B , and the difference from the above mentioned embodiment is illustrated as follows: The electrical property measuring apparatus 100 of the embodiment includes a first sealing element 170 A and a second sealing element 170 B configured on the second plate 120 separately, wherein the first sealing element 170 A surrounds the second sealing element 170 B, and the first sealing element 170 A and the second sealing element 170 B are detachable and assembled to the second plate 120 , so that the electrical property measuring apparatus 100 can be adapted to a first object 140 A or a second object 140 B with different areas. For example, when the electrical property of the first object 140 A with a larger area is measured, as shown in FIG. 6C , the first sealing element 170 A located at the outer peripheral can be used, whereas when the electrical property of the second object 140 B with a smaller area is measured, the second sealing element 170 B can be used, and it is unnecessary to use the first sealing element 170 A. Accordingly, the applicability of the electrical property measuring apparatus 100 can be increased. In addition, the size or the shape of the first and second sealing element 170 A and 170 B can be adjusted according to actual requirements in order to adjust the applicability of the electrical property measuring apparatus 100 .

In one embodiment of the disclosure, the first sealing element 170 A can be disposed outside the space C 1 .

In one embodiment of the disclosure, the second sealing element 170 B can be disposed inside the space C 1 .

Wherein the second plate 120 may or may not have to dispose recess thereon. This embodiment can also be adapted to the first plate 110 .

When the first plate 110 and the second plate 120 are closed and the first plate 110 to the second plate 120 are fixed by the fastening assembly 160 , a space C 1 is formed by the pressed surface and the first plate 110 to the second plate 120 . At the same time, the annular sealing element 170 B within the space C 1 presses on the object 140 , so that the wires 128 are electrically connected to the object 140 and the electrical property measuring unit 190 respectively. And then, the controller 180 is operated to output a signal to open the inlet valve 152 and to close the outlet valve 154 , and the pump 156 of the fluid supplying system 150 is actuated to bring the fluid in the fluid tank 158 into the space C 1 through the inlet valve 152 and the third flow path L 3 . When the fluid pressure in the space C 1 reaches a predetermined value, the fluid pressure detector 114 within the space C 1 may transmit a signal to the controller 180 , at this time the controller 180 closes the inlet valve 152 and the pump 156 to stop providing the fluid, and the electrical property measuring unit 190 is actuated for measuring the electrical property of the object 140 . After the electrical property measuring unit 190 finishes the measurement, a signal is transmitted to the controller 180 . After that, the controller 180 closes the inlet valve 152 and the pump 156 first and then opens the outlet valve 154 , so that the fluid can be output to the fluid tank 158 out of the space C 1 through the fourth flow path L 4 and the outlet valve 154 . Finally, when the fluid pressure in the space C 1 is decreased to a predetermined value (e.g., equal to the pressure of the external environment), the fluid pressure detector 114 in the space C 1 may send a signal to the controller 180 , and then after the controller 180 closes the outlet valve 154 and the pressure within the space C 1 is released, the first plate 110 can be opened and the object 140 can be taken out. And after the electrical property of the object 140 is measured, the procedures of calibrating the pressure sensor are similar to FIG. 1A and FIG. 1B , and thus it is not repeated herein.

FIG. 7 is a three-dimensional schematic view of an electrical property measuring apparatus for pressure sensor of the disclosure. The electrical property measuring apparatus 100 for pressure sensor of the disclosure includes the first plate 110 and the second plate 120 , and the first plate 110 and the second plate 120 are pivoted by a pivoting assembly A 1 at the same sides to be relatively opened or closed. When the first plate 110 and the second plate 120 are closed, the space C 1 can be formed between the first plate 110 and the second plate 120 . The fastening assembly 160 tightly fixes the first plate 110 and the second plate 120 , so as to further ensure the pressing ability of the space C 1 .

In light of the foregoing, in the embodiment of the disclosure, the electrical properties of the pressure sensors are measured through the space formed by at least a portion or the whole object to be measured being disposed between the first plate and the second plate, so that the fluid can press on the object and the electrical property of the object can be measured after the fluid enters the space. And the fluid pressure within the space can be detected by the fluid pressure detector and provides the follow-up procedures of the calibration of pressure sensors.

Although the disclosure has been described with reference to the above embodiments, it will be apparent to one of the ordinary skill in the art that modifications to the described embodiment may be made without departing from the spirit of the disclosure. Accordingly, the scope of the disclosure will be defined by the attached claims not by the above detailed descriptions.