CN-114995209-B - Laser weakening process control system and method

CN114995209BCN 114995209 BCN114995209 BCN 114995209BCN-114995209-B

Abstract

The system comprises a laser detection module and a laser control module, wherein the laser detection module is used for sampling heat transmitted through a plate, converting the heat into corresponding electric signals and feeding the corresponding electric signals back to the laser control module in real time, the laser control module is used for transmitting real-time control signals to a laser, controlling the laser to output pulses with corresponding power, frequency and duty ratio through the real-time control signals, receiving electric signals fed back by the laser detection module, and adjusting the real-time control signals in real time based on the electric signals fed back by the laser detection module. According to the invention, by controlling various parameters of laser in real time, the accurate control of the laser processing depth on the plate can be realized, and the aim of accurately controlling the weakening intensity of the material is achieved.

Inventors

ZHANG YUCHEN
HE DONGXU
ZHONG YI
XIE ZHIQI
CAI QING
LI MIN
WU PI

Assignees

华工法利莱切焊系统工程有限公司
华工法利莱切焊系统工程有限公司

Dates

Publication Date: 20260421
Application Date: 20220419
Priority Date: 20220419

Claims (5)

1. A laser weakening process control system, which is characterized by comprising a laser detection module and a laser control module; The laser detection module is used for sampling heat transmitted through the plate, converting the heat into corresponding electric signals and feeding the corresponding electric signals back to the laser control module in real time; The laser control module is used for transmitting a real-time control signal to the laser, controlling the laser to output pulses with corresponding power, frequency and duty ratio through the real-time control signal, receiving an electric signal fed back by the laser detection module, and adjusting the real-time control signal in real time based on the electric signal fed back by the laser detection module; the laser detection module comprises a pyroelectric sensor, a signal conditioning circuit and a feedback output interface; the pyroelectric sensor is used as a thermoelectric conversion device and is used for converting sampled heat into a sensor signal; The signal conditioning circuit is used for converting the sensor signal into an analog voltage signal and feeding the analog voltage signal back to the laser control module through the feedback output interface; The signal conditioning circuit comprises a current amplifying circuit and a band-stop filter circuit which are electrically connected in sequence, and sensor signals output by the pyroelectric sensor are converted into analog voltage signals through the current amplifying circuit and the band-stop filter circuit and then output to the laser control module; The laser control module comprises a feedback input interface, a real-time control module and a laser signal output module, wherein the feedback input interface is used for receiving real-time electric signals fed back by the laser detection module, the real-time control module is used for converting the electric signals into real-time control signals for controlling various parameters of laser, and the laser signal output module is used for controlling the output of the laser in real time based on the real-time control signals; the laser control module further comprises an upper computer interface, and the real-time control module is electrically connected with the upper computer through the upper computer interface, receives processing flow parameters sent by the upper computer and uploads a processing report to the upper computer; the real-time control signal comprises laser parameters including laser output power, frequency and duty cycle, and the laser outputs pulses of corresponding power, frequency and duty cycle based on the power, frequency and duty cycle in the laser parameters.
2. The laser weakening process control system of claim 1 wherein the laser control module further comprises an I/O interface, the real time control module communicating with an external device through the I/O interface.
3. A laser weakening process control method applying the laser weakening process control system according to claim 1 or 2, characterized in that the method comprises: The method comprises the steps of sampling heat transmitted through a plate in real time through a laser detection module, converting the heat into corresponding electric signals, and feeding the corresponding electric signals back to a laser control module in real time; And transmitting a real-time control signal to the laser through the laser control module, controlling the laser to output pulses with corresponding power, frequency and duty ratio through the real-time control signal, receiving an electric signal fed back by the laser detection module, and adjusting the real-time control signal in real time based on the electric signal fed back by the laser detection module.
4. A laser weakening process control method according to claim 3 wherein the real time control signal comprises laser parameters comprising laser output power, frequency and duty cycle, the laser outputting pulses of respective power, frequency and duty cycle based on the power, frequency and duty cycle of the laser parameters.
5. The method according to claim 4, wherein the receiving the electrical signal fed back by the laser detection module and adjusting the real-time control signal in real time based on the electrical signal fed back by the laser detection module specifically comprises: And receiving a real-time electric signal fed back by the laser detection module, converting the electric signal into a real-time control signal for controlling various parameters of the laser, and controlling the output of the laser in real time based on the real-time control signal.

Description

Laser weakening process control system and method Technical Field The invention relates to the field of laser processing, in particular to a laser weakening process control system and a laser weakening process control method. Background Along with the continuous expansion of the laser processing field, the weakening process of the plate strength by using laser becomes a new application field, and is different from the traditional cutting or welding process, and the weakening process reduces the physical characteristics of strength and the like in certain places inside the plate under the condition of not changing the external dimension of the plate, so that certain specific requirements, such as weakening and processing of an automobile instrument panel, are met. For example, the weakening process of the automobile instrument panel aims to change the connection strength of the safety air bag part of the automobile instrument panel under the condition of not affecting the appearance, so that the safety air bag can be quickly exploded out of the corresponding part of the instrument panel in case of traffic accidents, the personnel in the automobile are protected, and the instrument panel is not damaged due to daily operation. Disclosure of Invention In view of the technical defects and drawbacks existing in the prior art, embodiments of the present invention provide a laser weakening process control system and method for overcoming or at least partially solving the above problems, with the following specific schemes: as a first aspect of the present invention, there is provided a laser weakening process control system comprising a laser detection module and a laser control module; The laser detection module is used for sampling heat transmitted through the plate, converting the heat into corresponding electric signals and feeding the corresponding electric signals back to the laser control module in real time; The laser control module is used for transmitting a real-time control signal to the laser, controlling the laser to output pulses with corresponding power, frequency and duty ratio through the real-time control signal, receiving an electric signal fed back by the laser detection module, and adjusting the real-time control signal in real time based on the electric signal fed back by the laser detection module. Further, the real-time control signal comprises laser parameters including laser output power, frequency and duty cycle, and the laser outputs pulses of corresponding power, frequency and duty cycle based on the power, frequency and duty cycle in the laser parameters. Further, the laser detection module comprises a pyroelectric sensor, a signal conditioning circuit and a feedback output interface; the pyroelectric sensor is used as a thermoelectric conversion device and is used for converting sampled heat into a sensor signal; the signal conditioning circuit is used for converting the sensor signal into an analog voltage signal and feeding the analog voltage signal back to the laser control module through the feedback output interface. Further, the signal conditioning circuit comprises a current amplifying circuit and a band-stop filter circuit which are electrically connected in sequence, and the sensor signal output by the pyroelectric sensor is converted into an analog voltage signal through the current amplifying circuit and the band-stop filter circuit and then is output to the laser control module. Further, the laser control module comprises a feedback input interface, a real-time control module and a laser signal output module, wherein the feedback input interface is used for receiving real-time electric signals fed back by the laser detection module, the real-time control module is used for converting the electric signals into real-time control signals for controlling various parameters of laser, and the laser signal output module is used for controlling the output of the laser in real time based on the real-time control signals. Further, the laser control module further comprises an upper computer interface, and the real-time control module is electrically connected with the upper computer through the upper computer interface, receives processing flow parameters sent by the upper computer and uploads a processing report to the upper computer. Further, the laser control module further comprises an I/O interface, and the real-time control module is communicated with external equipment through the I/O interface. As a second aspect of the present invention, there is provided a laser weakening process control method comprising: The method comprises the steps of sampling heat transmitted through a plate in real time through a laser detection module, converting the heat into corresponding electric signals, and feeding the corresponding electric signals back to a laser control module in real time; And transmitting a real-time control signal to the laser through the laser control module, controllin