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A light curtain detection method and device without dedicated synchronization line

A detection method and technology of synchronizing line, which are applied in the directions of using optical devices to transmit sensing components, optical device exploration, etc., can solve the problems of high cost, complex method, weak performance, etc., and achieve the effect of hardware economy, simple method and consistent performance.

Active Publication Date: 2022-05-24
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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  • A light curtain detection method and device without dedicated synchronization line
  • A light curtain detection method and device without dedicated synchronization line
  • A light curtain detection method and device without dedicated synchronization line

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Experimental program
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Embodiment 1

[0029] The invention discloses a light curtain detection method without a dedicated synchronization line, the method comprising the following steps:

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

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

[0032] If S3 is not synchronized, the RX receives continuous sampling of the first time period of the selected headlight, and according to the lighting cycle, every time M ADC data judgment signals are collected, M is a positive integer;

[0033] S4 starts the timer when there is a continuous signal for N times, the second time for the first time, and the period of the subsequent third time, after entering the timer, ADC data collection is performed and compared, N is a positive integer;

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

Embodiment 2

[0039] This Embodiment 2 may be obtained by further expanding on the basis of Embodiment 1, and the description of the same or similar corrections is omitted. This embodiment 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 the selected headlight for 10μs continuous sampling, and according to the lighting cycle, every 3 ADC data judgment signals are collected;

[0043] S4 starts the timer when there is a signal 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 dedicated lighting sequence and lighting cycle in the S1 is that each lamp is 1ms, of which 400μs rest...

Embodiment 3

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

[0051] The device of this embodiment receives and processes the collected signal according to a rule, and when the signal matches the special lighting sequence, synchronization is completed. After that, the signal acquisition of all beams can be completed according to the specified period and sequence.

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Abstract

The present invention relates to the field of no-synchronization line technology, and in particular to a light curtain detection method and equipment without a dedicated synchronous line. The present invention uses a special lighting sequence and a lighting cycle to control the emission light source of the TX light curtain to complete a round of lighting; during the lighting process , RX performs reception synchronization; if it is not synchronized, the RX receives and selects the cycle of the headlight for continuous sampling at the first time; when there are signals continuously for N times, the timer is started, and after entering the timer, ADC data collection is performed and compared; If there is no signal for the first time and the tail light signal is successfully collected for the second time, the synchronization is successful; otherwise, the synchronization fails in any other way; if the synchronization is successful, the status is calculated according to the collected signal. If the synchronization fails and times out, it is directly judged as the blocked state, and finally Output the result according to the state of the light curtain; after output, the light curtain repeats the above steps. The method of the invention is simple, can reduce the number of cable cores and the anti-interference and protection circuit of the synchronous line, reduces the cost, and has the same performance as the 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 device 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 light curtain emission and reception must be connected by a synchronization line, and the connecting cables must be converged. Resulting in very long cables, high damage rate, high cost and so on. [0003] There are also some light curtains without dedicated synchronization lines. Similarly, there are also some defects, such as: the method is more complicated; the light curtains with synchronization lines require some special hardware support, resulting in higher cost; or the performance is weaker than the synchronization line. light curtain. SUMMARY OF THE INVENTION [0004] Aiming ...

Claims

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Application Information

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Patent Type & Authority Patents(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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