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A safe lkj braking control method

A braking control and safety technology, applied in the direction of brakes, braking transmissions, railway signals and safety, etc., can solve the problems of inability to detect software abnormality in time, failure of braking output control, low safety level, etc., so as to avoid errors. The effect of braking, ensuring safety, and improving the safety level

Active Publication Date: 2021-06-04
BEIJING JIAODA SIGNAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As an important device for implementing security guarantees, the existing monitoring host of LKJ uses a single CPU operation, and the security level is low, so it is impossible to detect software abnormalities in time
[0004] In addition, the brake output relay of the existing LKJ adopts the bus control method. When a hardware short circuit or open circuit occurs, the brake output control will be invalid.

Method used

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  • A safe lkj braking control method
  • A safe lkj braking control method
  • A safe lkj braking control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1 Braking Control in Different Scenarios

[0036] The relay control adopts two methods of level and dynamic square wave. Different control methods can be selected according to different needs. The main board sends different instructions through the parallel bus to generate corresponding controls. In the case of LKJ in the present invention, the channel relays for unloading, pressure maintaining and decompression select the bus control mode, using normally open nodes to form a braking circuit; emergency braking adopts square wave control, using normally closed nodes to form a braking circuit.

[0037] When a hardware failure occurs and the control signal is normally high or low, the emergency brake relay control square wave will disappear, the relay will fall, the normally closed node will be closed, and the system will lead to the safe side.

[0038] In order to meet the dual system hot standby redundancy and avoid false braking when a single system fails, a ...

Embodiment 2

[0044] Comparison between Embodiment 2 and other security control schemes

[0045] Regarding the method of improving the safety level of LKJ brake output, in addition to the scheme proposed in this paper, other manufacturers have also proposed to design the brake unit as an independent module with logic operation functions, which can simultaneously accept the control commands of the two series of hosts, and control the two systems. The control commands are compared, and the control system switching and brake output are performed according to the comparison results.

[0046] In this solution, it is not clear whether the brake output modules of the two systems adopt a two-out-of-two structure, and the safety of the output link is not as high as the solution of the present invention. Furthermore, if the brake module also adopts a two-out-of-two structure, the security level of the scheme proposed in this paper is consistent; but in the scheme proposed in this paper, only the main...

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Abstract

The present invention provides a safe LKJ brake control method, based on the two-by-two design, the brake control is completed by the main board and the output board; the main board completes the monitoring function; the output board uses a safety relay to build a brake output circuit, The main board controls the action of the brake relay to realize the brake output. The main board is connected to the output board through the parallel bus, sends control commands to the output board, and reads the status of the relay; the main board adopts a two-out structure; Perform binary comparison with the output data, and if they are inconsistent, turn to the fault state; each main board of the dual-system redundancy adopts a logic "or" mode to output braking information. The solution of the present invention brings the following technical advantages: the safety level of the monitoring plug-in is improved through the design of taking two out of two; avoiding false braking caused by the failure of a single-series host and ensuring that the system can output braking when a dual-series host fails; only the mainboard has CPU, the overall structure is relatively simple.

Description

technical field [0001] The invention relates to a train operation monitoring system, in particular to the brake output control of a train operation monitoring device (LKJ). Background technique [0002] The train operation monitoring device (LKJ) is in line with the conditions of railway line equipment and facilities and the requirements of transportation organization in various eras, and it can play the role of ensuring safety to the greatest extent. [0003] As an important device for implementing security guarantees, the monitoring host of the existing LKJ uses a single CPU operation, which has a low security level and cannot detect software abnormalities in time. [0004] In addition, the brake output relay of the existing LKJ adopts the bus control method. When a hardware short circuit or open circuit occurs, the brake output control will be invalid. Contents of the invention [0005] The invention proposes a two-by-two-out-two LKJ monitoring host solution, and on th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B61L15/00B60T13/66
CPCB60T13/665B61L15/0054
Inventor 韩鹏飞张健汤炳辉
Owner BEIJING JIAODA SIGNAL TECH
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