CN-121983834-A - Laser light path protection and fault rapid positioning method, device and medium

CN121983834ACN 121983834 ACN121983834 ACN 121983834ACN-121983834-A

Abstract

The invention relates to the technical field of laser fault detection and discloses a method, equipment and a medium for protecting a laser light path and rapidly positioning faults. The method comprises the steps of arranging a thermosensitive optical sensor, an optical path optical sensor and a space optical sensor at a preset node of a laser, gradually increasing laser power, binding and storing lighting path optical data and corresponding power to preset power after light emitting, controlling the laser to stop light and collect initial temperature, gradually increasing power, collecting temperature at preset time after light emitting, calculating temperature increment and accumulation increment, stopping light and cooling until the power reaches a preset value after each storage, and reading sensor data to calculate actual power and early warning. According to the invention, by arranging three sensors of thermosensitive, optical path optical and space optical and a control board, the early warning is carried out on two parameters of power difference and temperature increment, the device/optical fiber burning can be avoided in a quick response manner, the maintenance cost is reduced, and the downtime of large-scale integrated equipment due to the laser fault is prevented.

Inventors

LIN SONG
LI QI
LIANG XIAOBAO
XU FUCHUN
ZHAO JIANJUN

Assignees

四川思创激光科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260130

Claims (10)

1. A laser light path protection and fault quick positioning method is characterized by comprising the following steps: A thermal sensor and an optical path optical sensor are arranged at preset nodes of the laser, space optical sensors are arranged at four corner points of an optical path surface of the laser, and a laser control board is configured; When the laser power is measured, the laser light emitting power is gradually increased, the laser light emitting is controlled, the optical path optical sensor data are collected, the collected optical path optical sensor data and the corresponding laser output power are bound and stored until the laser power reaches a preset value; controlling the laser to stop light and collect initial temperature of each temperature acquisition point, gradually increasing the laser light emitting power again, controlling the laser to wait for preset time after light emitting, collecting current temperature of each temperature acquisition point, calculating temperature increment and accumulated temperature increment, and binding and storing the temperature increment, the accumulated temperature increment and the corresponding laser power; And reading the optical sensor data and the heat-sensitive sensor data of the optical path, calculating the actual output power of the laser, comparing the actual output power with the target power, and judging whether to pre-warn.
2. The method for protecting an optical path of a laser and rapidly locating faults according to claim 1 in which the preset nodes comprise a melting point of the laser, a beam combiner and a CPS.
3. The method for protecting and rapidly locating faults of a laser light path according to claim 1 and characterized in that a probe of the light path optical sensor is aligned with an optical fiber and used for detecting optical fiber delamination light.
4. The method for protecting an optical path of a laser and rapidly positioning faults according to claim 1 and characterized in that a framework combining an FPGA and a high-speed AD is adopted to realize the response of sensor data.
5. The method of claim 1, wherein the step-up of the laser output power comprises increasing the laser output power by 5% each time at a predetermined interval.
6. The method for protecting a laser optical path and rapidly positioning faults according to claim 1, wherein the temperature increment tt=tn-Tn-1 and the accumulated temperature increment tp=tn-T0; Wherein Tn is the current temperature of the temperature acquisition point, and Tn-1 is the temperature data of the temperature acquisition point acquired last time.
7. The method for protecting an optical path of a laser and rapidly positioning a fault according to claim 1, wherein comparing the actual output power with the target power and judging whether to pre-warn comprises: If the difference value is larger than the preset power difference value, acquiring a standard temperature increment and a standard accumulated temperature increment of each temperature acquisition point under corresponding power based on temperature data, comparing the actual temperature increment with the standard temperature increment, and comparing the actual accumulated temperature increment with the standard accumulated temperature increment; And if the actual temperature increment is larger than the standard temperature increment or the actual accumulated temperature increment is larger than the standard accumulated temperature increment, early warning is carried out.
8. The method for protecting an optical path of a laser and rapidly locating a fault according to claim 1, further comprising fault locating: Reading space optical sensor data and laser power data, if the space optical sensor data is larger than a preset threshold value, reading heat-sensitive sensor data, calculating the temperature increment of each temperature acquisition point, comparing and sequencing each temperature increment with a standard temperature increment, and determining the node with the highest abnormal temperature increment; And reading the optical sensor data of the node, the node above and the node below, if the optical sensor data of the node is larger than a preset threshold value and the optical sensor data of the node above is smaller than the preset threshold value, determining the node as a fault position, controlling the laser to stop light and outputting fault position information.
9. An electronic device comprising a memory for storing a computer program, and a processor for implementing the steps of the laser path protection and fault quick location method according to any one of claims 1-8 when executing the computer program.
10. A storage medium having stored therein a computer program which, when executed by a processor, implements the laser path protection and fault quick location method steps of any one of claims 1-9.

Description

Laser light path protection and fault rapid positioning method, device and medium Technical Field The invention relates to the technical field of laser fault detection, in particular to a method, equipment and medium for protecting a laser light path and rapidly positioning faults. Background In the laser production process, the laser is difficult to burn, and the main reasons for burning are over high melting point temperature, high device temperature and the like. The method for monitoring the melting point and the device temperature of the laser in the use process is simple, quick response is not realized, the laser cannot react until the laser burns out tens of centimeters or even longer, and the whole laser is overhauled or scrapped due to the fact that important devices are burnt out or optical fibers are burnt out too long. The current overheat protection and optical protection schemes of the laser are simpler, only a single heat protection scheme or a single optical protection scheme is adopted, the two schemes are not combined together, and the current response speed is very low, so that the power supply cannot be turned off in time, and the optical fiber or the device is burnt when the power supply is turned off in response. Once the device is burnt out, the whole maintenance cost is greatly increased, a great economic burden is brought to an equipment factory, if the optical fiber is burnt out, the maintenance cost is larger, and the whole laser is scrapped more seriously. Lasers are often only used as single components of integrated equipment, a large-scale integrated equipment has a plurality of lasers, damage to one of the lasers can lead to downtime of the whole equipment, and irreparable economic loss is caused. Disclosure of Invention In view of the above, the present invention provides a method, apparatus and medium for protecting an optical path of a laser and rapidly locating faults, so as to solve the above problems. In order to solve the technical problems, the invention provides a laser light path protection and fault quick positioning method, which comprises the following steps: A thermal sensor and an optical path optical sensor are arranged at preset nodes of the laser, space optical sensors are arranged at four corner points of an optical path surface of the laser, and a laser control board is configured; When the laser power is measured, the laser light emitting power is gradually increased, the laser light emitting is controlled, the optical path optical sensor data are collected, the collected optical path optical sensor data and the corresponding laser output power are bound and stored until the laser power reaches a preset value; Controlling the laser to stop light and collect initial temperature of each temperature acquisition point, gradually increasing the laser light emitting power again, controlling the laser to wait for preset time after light emitting, collecting current temperature of each temperature acquisition point, calculating temperature increment and accumulated temperature increment, binding the temperature increment and the accumulated temperature increment with corresponding laser power for storage, and controlling the laser to stop light and wait for preset cooling time after each data storage until the laser power reaches a preset value; Reading optical sensor data and thermal sensor data of an optical path, calculating actual output power of a laser, and comparing the actual output power with target power: if the difference value is larger than the preset power difference value, acquiring the standard temperature increment and the standard accumulated temperature increment of each temperature acquisition point under the corresponding power based on the temperature data, comparing the actual temperature increment with the standard temperature increment, comparing the actual accumulated temperature increment with the standard accumulated temperature increment, and if the actual temperature increment is larger than the standard temperature increment or the actual accumulated temperature increment is larger than the standard accumulated temperature increment, carrying out early warning. As an alternative, the preset nodes include the melting point of the laser, the combiner, and the CPS. As an alternative, the probe of the optical sensor is aligned with the optical fiber for detecting the optical fiber delamination light. As an alternative, a framework of FPGA in combination with high speed AD is used to achieve the response of the sensor data. As an alternative, the step-up of the laser output power includes increasing the laser output power by 5% each time at preset intervals. As an alternative, the temperature increment tt=tn-Tn-1, the cumulative temperature increment tp=tn-T0; Wherein Tn is the current temperature of the temperature acquisition point, and Tn-1 is the temperature data of the temperature acquisition point acquired last time. As an alternati