Each of a master node and a slave node has a safety data processing unit and a high reliability communication unit. At the time of transmission, the safety data processing unit creates a safety data packet including data about safety and the high reliability communication unit creates a communication data packet including the safety data packet and transmits the communication data packet a predetermined number of times. At the time of reception, the high reliability communication unit acquires and outputs a safety data packet by determining one of one or more communication data packets having the same contents which it has received properly as an effective packet, and the safety data processing unit analyzes a state concerning the safety of a system on the basis of the data about safety acquired from the safety data packet.

Claims

14 · 1 independent · depth 4

14 granted claims

›1.independentA signal transmission device for elevator comprising:na slave node to which information showing a state of a switch or a sensor concerning control of …+13

A signal transmission device for elevator comprising:na slave node to which information showing a state of a switch or a sensor concerning control of safety of an elevator is inputted; anda master node that controls an operation of said elevator, in which one of said slave node and said master node transmits data about the safety of said elevator via a communication network and the other one of said slave node and said master node receives the data via the communication network, whereineach of said slave node and said master node includes a safety data processing unit and a communication processing unit, and the safety data processing unit and the communication processing unit included in each node operate in parallel with each other,said safety data processing unit in the slave node acquires said data about the safety at fixed time intervals and also adds an error detecting code which can achieve a predetermined rate of overlooking errors to create first data, and outputs the first data to said communication processing unit in the slave node,said safety data processing unit in the master node checks whether or not said error detecting code of said first data outputted from said communication processing unit in the slave node is correct and analyzes a state concerning the safety of said elevator on a basis of said data about the safety acquired from the first data in which no error is detected, andsaid communication processing unit in the slave node creates second data including said first data outputted from said safety data processing unit in the slave node, and transmits said second data via said communication network a predetermined number of times, and when properly receiving one or more pieces of said second data having a same content, said communication processing unit in the master node determines one of the one or more pieces of said second data as effective second data, and outputs the first data to said safety data processing unit in the master node, and whereinthe safety data processing unit in said master node stops the elevator when detecting an error from the error detecting code of the first data inputted from the communication processing unit in the master node or when said master node cannot receive said first data during a certain period of time.

›2.↳ 1The signal transmission device for elevator according to claim 1, wherein each of said safety data processing units has a plurality of operational cir…d2

›3.↳ 1The signal transmission device for elevator according to claim 1, wherein each of said communication processing units has a unit capable of specifying…d2

›4.↳ 1The signal transmission device for elevator according to claim 1, wherein when plural pieces of said data about the safety are acquired by the safety …d2+2

›7.↳ 1The signal transmission device for elevator according to claim 1, wherein when plural pieces of said data about the safety are acquired by the safety …d2+2

›10.↳ 1The signal transmission device for elevator according to claim 1, further comprising:na notification memory that notifies data which at least one comm…d2

›11.↳ 1The signal transmission device for elevator according to claim 1, further comprising:na continuous transmission processing unit that makes a request o…d2

›12.↳ 1The signal transmission device for elevator according to claim 1, wherein the safety data processing unit of the slave node stops the output of said d…d2

›13.↳ 1The signal transmission device for elevator according to claim 1, wherein each safety data processing unit and each communication processing unit has …d2

›14.↳ 1The signal transmission device for elevator according to claim 1, wherein the communication processing unit in the slave node adds a packet number and…d2

Classifications

6 codes

IPC · International Patent Classification

Section B — Performing operations; transporting

B66B5/00
B66B1/34

Section G — Physics

G06F11/00

Section H — Electricity

H04L1/08
H04L1/00

USPC · US Patent Classification

714/704

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Pendency

4.6 y

1,681 days filing → grant

Office actions

non-final + final

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no RCE

Examiner

Phung M Chung

art unit 2117 · TC 2100

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Citations: 19 back · 0 forward

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1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20110302466 A1	8 Dec 2011

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