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Light curtain detection method and equipment without special synchronous lines

A detection method and technology of synchronous lines, which are applied in the direction of using optical devices to transmit sensing components, optical device exploration, etc., and can solve problems such as complex methods, weak performance, and high cost

Active Publication Date: 2020-10-27
HUZHOU ZAAG ELECTRIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention discloses a light curtain detection method and equipment without a dedicated synchronous line, which is used to solve the problem that the transmission and reception of the light curtain of the traditional synchronous line must be connected by a synchronous line, and the connecting cables must converge , the method is more complicated; compared with the light curtain of the synchronous line, some special hardware support is required, resulting in higher cost; or the performance is weaker than the light curtain of the synchronous line.

Method used

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  • Light curtain detection method and equipment without special synchronous lines
  • Light curtain detection method and equipment without special synchronous lines
  • Light curtain detection method and equipment without special synchronous lines

Examples

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Effect test

Embodiment 1

[0029] The invention discloses a method for detecting a light curtain without a dedicated synchronization line. The method includes the following steps:

[0030] S1 uses the special lighting sequence and lighting cycle to control the TX light curtain to emit light source and complete a round of lighting;

[0031] During the lighting process of S2, RX performs receiving synchronization;

[0032] If S3 is not synchronized, then the RX receives and selects the first time cycle of the headlight to continuously sample, and according to the lighting cycle, each time M pieces of ADC data are collected to judge the signal, M is a positive integer;

[0033] S4 starts the timer when there are signals continuously for N times, the first second time, and the subsequent third time cycle, after entering the timer, perform ADC data collection and comparison, N is a positive integer;

[0034] S5 If there is no signal for the first time and the tail light signal is successfully collected for ...

Embodiment 2

[0039] Embodiment 2 can be further expanded on the basis of Embodiment 1, and descriptions of the same or similar corrections are omitted. This example includes:

[0040] The value of M is between 1 and 10, the value of N is between 3 and 20, the first time is between 1 μs and 20 μs, the second time is between 300 μs and 1 ms, and the third time is between 300 μs and 1 ms. The time is between 500μs and 5ms.

[0041] Specifically, for example:

[0042] If S3 is not synchronized, the RX receives and selects headlights for continuous sampling in a period of 10 μs, and judges the signal every time 3 ADC data are collected according to the lighting cycle;

[0043] S4 starts the timer when there are signals for 8 consecutive times, the first 760μs, and the subsequent 1ms period, after entering the timer, ADC data acquisition is performed and compared;

[0044] In addition, the special lighting sequence and lighting period in S1 are, each light is 1ms, 400μs rest, 600μs repeated l...

Embodiment 3

[0049] This embodiment discloses a light curtain detection device without a dedicated synchronization line, which includes an execution instruction, and when the processor of the electronic device executes the execution instruction, the electronic device executes the method described in the first embodiment;

[0050] It includes a processor and a memory storing execution instructions, and when the processor executes the execution instructions stored in the memory, the processor executes the method described in the first embodiment.

[0051] The device in this embodiment receives and processes the collected signals according to a rule, and when the signals match the special lighting sequence, the synchronization is completed. Afterwards, the signal collection of all beams can be completed according to the specified cycle and sequence.

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Abstract

The invention relates to the technical field of no synchronous lines, in particular to a light curtain detection method and device without special synchronous lines, and the method comprises the steps: controlling a TX light curtain to emit a light source through employing a special lighting sequence and a lighting period, and completing one round of lighting; in the lighting process, through theRX, performing receiving synchronization; if synchronization fails, the RX receiving and selecting periodic continuous sampling of a head lamp at the first time; when signals exist for N times continuously, starting a timer, and after entering the timer, performing ADC data acquisition and comparison; if there is no signal for the first time and taillight signal collection for the second time succeeds, judging that synchronization succeeds, or otherwise, judging that synchronization fails in any other mode; if synchronization succeeds, calculating the state according to the collected signals,if synchronization fails and timeout occurs, directly judging that the state is shielded; and finally, outputting a result according to the light curtain state, and after output, the light curtain repeating the above steps. The method is simple, the number of cable cores and an anti-interference and protection circuit of the synchronous line can be reduced, the cost is reduced, and the performanceis consistent with that of a light curtain of the synchronous line.

Description

technical field [0001] The invention relates to the technical field of no synchronization line, in particular to a light curtain detection method and equipment without a dedicated synchronization line. Background technique [0002] There are many light curtains with dedicated synchronization lines on the market, but there are also many defects. For example, one of the shortcomings includes: the transmission and reception of the light curtain must be connected by a synchronization line, and the connecting cables must be merged. The cable is very long, the damage rate is high, and the cost is high. [0003] There are also some light curtains without a dedicated synchronization line. Similarly, there are some defects, such as: the method is more complicated; compared with the light curtain of the synchronization line, it needs some special hardware support, resulting in higher cost; or the performance is weaker than that of the synchronization line. light curtain. Contents o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/32G01V8/20
CPCG01D5/32G01V8/20
Inventor 张忠伟李金鹏董泉
Owner HUZHOU ZAAG ELECTRIC TECH
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