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Circuit and method for acquiring conditional information for fault-oriented safety

A conditional information, safety-oriented technology, applied in electrical program control, program control in sequence/logic controllers, etc., can solve problems such as limiting the application range of circuits, and achieve the effect of reducing the number and expanding the applicable range

Active Publication Date: 2018-10-16
CRSC RESEARCH & DESIGN INSTITUTE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] visible, figure 1 The condition information reading circuit shown requires two condition interfaces to realize the acquisition of two kinds of condition information. The large number of condition interfaces will limit the scope of application of the circuit, especially when the number of device ports is limited.

Method used

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  • Circuit and method for acquiring conditional information for fault-oriented safety
  • Circuit and method for acquiring conditional information for fault-oriented safety
  • Circuit and method for acquiring conditional information for fault-oriented safety

Examples

Experimental program
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Effect test

Embodiment 1

[0043] See figure 2 , which shows a schematic diagram of the electrical principle of the fail-oriented safety condition information acquisition circuit provided by the present application. The fail-oriented safety condition information acquisition circuit includes: a condition interface Input, a first switch T1, a second switch T2D, a third switch switch T3C, first optocoupler T2C, second optocoupler T3D, first resistor R1, second resistor R2, third resistor R3, fourth resistor R4, fifth resistor R5, sixth resistor R6, seventh resistor R7, The first power supply VCCTJ and the second power supply VCC.

[0044] A first end of the first resistor R1 is connected to the condition interface Input, and the condition interface Input is connected to the first power supply VCCTJ or the reference ground GNDTJ.

[0045] Wherein, the condition interface Input is connected to the first power supply VCCTJ or the reference ground GNDTJ, respectively representing two different condition info...

Embodiment 2

[0079] Corresponding to the above fault-oriented safety condition information acquisition circuit, this embodiment provides a fault-oriented safety condition information acquisition method. The execution subject of the fault-oriented safety condition information acquisition method provided in this embodiment is a controller. Please see Figure 4 , can include the following steps:

[0080] Step S41: Generate a first control signal, a second control signal and a third control signal corresponding to each switch control combination value, respectively output the first control signal to the first switch and output the second control signal to the the second switch and output the third control signal to the third switch.

[0081] Step S42: Receive the first output signal output by the third terminal of the first optocoupler under different switch control combination values ​​and the first output signal output by the third terminal of the second optocoupler under different switch c...

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Abstract

This application provides a fail-safe condition information acquisition circuit and method. The condition information acquisition circuit includes: condition interface Input, first switch T1, second switch T2D, third switch T3C, first optocoupler T2C, second Optocoupler T3D, first resistor R1, second resistor R2, third resistor R3, fourth resistor R4, fifth resistor R5, sixth resistor R6, seventh resistor R7, first power supply VCCTJ and second power supply VCC. In this application, the condition information acquisition circuit can realize the input of two kinds of condition information through a condition interface, which reduces the number of condition interfaces and ensures that the condition information input through the condition interface will not be misidentified when the circuit fails .

Description

technical field [0001] The present application relates to the field of railway traffic safety, in particular to a circuit and method for acquiring condition information for fault-oriented safety. Background technique [0002] Generally, railway traffic safety-related equipment (for example, track circuit transmitters) are versatile, and can be adapted to different site requirements by setting different parameters. Condition information, the man-machine interface used to set parameters is called condition interface. At present, the condition information of railway traffic safety-related equipment is obtained through the condition information reading circuit. When the condition information reading circuit fails, it is necessary to ensure that the set condition information will not be misidentified by the controller. [0003] Among them, the current condition information reading circuit generally adopts such as figure 1 circuit shown. Such as figure 1 As shown, in order to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/04
CPCG05B19/04
Inventor 孙国营任国桥王华超
Owner CRSC RESEARCH & DESIGN INSTITUTE GROUP CO LTD
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