CN113203473B - Myriawatt-level laser power meter protection device and laser power test system - Google Patents
Myriawatt-level laser power meter protection device and laser power test system Download PDFInfo
- Publication number
- CN113203473B CN113203473B CN202110419535.2A CN202110419535A CN113203473B CN 113203473 B CN113203473 B CN 113203473B CN 202110419535 A CN202110419535 A CN 202110419535A CN 113203473 B CN113203473 B CN 113203473B
- Authority
- CN
- China
- Prior art keywords
- laser
- power meter
- laser power
- meter protection
- protection device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims description 71
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 85
- 238000001514 detection method Methods 0.000 claims abstract description 57
- 239000000498 cooling water Substances 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 39
- 238000012544 monitoring process Methods 0.000 claims abstract description 6
- 230000003993 interaction Effects 0.000 claims abstract description 4
- 238000009529 body temperature measurement Methods 0.000 claims description 64
- 238000001816 cooling Methods 0.000 claims description 39
- 238000012545 processing Methods 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 claims description 10
- 230000017525 heat dissipation Effects 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract description 2
- 239000000306 component Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 12
- 102000010637 Aquaporins Human genes 0.000 description 9
- 230000008859 change Effects 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 3
- 108091006146 Channels Proteins 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 108010063290 Aquaporins Proteins 0.000 description 1
- 230000005679 Peltier effect Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/0271—Housings; Attachments or accessories for photometers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
Abstract
The invention relates to a myriawatt-level laser power meter protection device and a laser power measurement system, wherein the device comprises a water flow detection sensing component and a high-definition camera, and a power meter protection controller, a touch display component and a laser enable signal component; the water flow detection sensing assembly is connected between the water cooler and the cooling water channel of the laser power meter and is used for monitoring the cooling water flow in real time; the touch display assembly is used for man-machine interaction operation; the high-definition camera is used for shooting and identifying laser spots; the laser enabling signal assembly is used for outputting/turning off a laser enabling signal to rapidly turn on/off a laser; the power meter protection controller is used for controlling the laser enable signal component to output/turn off the laser enable signal. The method has the beneficial effect of actively protecting the normal work of the myriawatt-level laser power meter in real time.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of measurement and control, in particular to a myriawatt-level laser power meter protection device and a laser power test system.
[ background of the invention ]
A laser power meter is an instrument used to measure laser energy. Because the detection area of the laser power meter receives laser with continuously high energy power density, the laser power meter is protected by heat dissipation cooling, such as water cooling, TEC (thermal Electric Cooler) made by peltier effect of semiconductor materials, and the like, especially, a laser power meter in ten-thousand watt level is expensive and needs to be protected in various ways, but the existing heat dissipation cooling is passive. When the diameter of the emitted laser spot is small, the local area of the optical power meter can continuously receive the laser with high energy power density, and if the laser emitted by the laser cannot be stopped in time, the laser energy accumulated in the detection area of the laser power meter in unit time is too much and is burnt out, so that serious economic loss is caused.
Application No.: CN201721924432.7, applicant: shenzhen pioxin laser corporation, a utility model name of a laser power meter protection device and a laser power test system relates to the technical field of laser test, the protection device is matched with a water cooling device for performing water cooling on a laser power meter, and comprises a stabilized voltage power supply, a detection module for acquiring the working state of the water cooling device and a switch module connected with the detection module, wherein the detection module is connected with the stabilized voltage power supply and is installed in a matching way with the water cooling device, the switch module is also connected with the stabilized voltage power supply and a tested laser, and the switch module controls the switch of the tested laser according to the working state of the water cooling device; the system comprises the laser power meter protection device; through detecting and monitoring the water cooling device, the laser and the laser power meter can be started for power test only when the water cooling device works normally, and the laser power meter can be prevented from being damaged due to overhigh temperature.
The moving average method (moving average method) is a simple smooth prediction technology, and its basic idea is: and calculating the time-sequence average value containing a certain number of terms in sequence according to the time-sequence data item by item in order to reflect the long-term trend. The moving average method is classified into: simple moving average and weighted moving average. The one-time moving average method is a prediction method which carries out one-time moving average on data in an observation period from far to near according to a certain crossing period and takes the last moving average value as a basis for determining a predicted value. The second moving average method is a method of performing second moving average on the first moving average, establishing a prediction model based on the first moving average and the second moving average, and calculating a predicted value.
Aiming at the defect that the existing heat dissipation cooling mode of the laser power meter is a passive protection mode, the invention improves the laser power meter protection device and the laser power test system.
[ summary of the invention ]
The invention aims to provide a real-time active protection device for protecting a myriawatt-level laser power meter from working normally.
In order to achieve the purpose, the technical scheme adopted by the invention is that the protective device for the myriawatt-level laser power meter comprises a detection part and a control part; the laser power meter adopts a water cooling device for water cooling and heat dissipation, and the water cooling device comprises a water cooling machine, cooling water and a cooling water channel; the detection part comprises a water flow detection sensing assembly and a high-definition camera; the control part comprises a power meter protection controller, a touch display component and a laser enable signal component; the water flow detection sensing assembly is connected between the water cooler and the cooling water channel of the laser power meter and is used for monitoring the cooling water flow in real time; the touch display assembly is used for man-machine interaction operation; the high-definition camera is used for shooting and identifying laser spots; the laser enabling signal assembly is used for outputting/turning off a laser enabling signal to rapidly turn on/off a laser; the power meter protection controller is used for receiving and processing the cooling water flow signal detected by the water flow detection sensing assembly and controlling the laser enabling signal assembly to output/turn off the laser enabling signal when the cooling water flow meets/does not meet the requirement; the power meter protection controller is also used for receiving and processing the laser spots shot and identified by the high-definition camera and controlling the laser enabling signal assembly to output/turn off the laser enabling signal when the size and the position of the laser spots meet/do not meet the requirements.
In a further preferred technical scheme, in the protection device for the myriawatt-level laser power meter, the detection part further comprises an infrared temperature measurement module; the control part also comprises a motor control assembly; the infrared temperature measurement module is used for measuring the laser temperature in a non-contact remote manner, and is provided with an electric adjustable-focus lens and an aiming indication LED light source for clearly indicating the detection area and range of the electric adjustable-focus lens of the infrared temperature measurement module; the motor control assembly is used for accurately adjusting the pointing angle of the infrared temperature measurement assembly; the high-definition camera is also used for shooting, identifying, aiming and indicating an LED light source indication area and range; the power meter protection controller is also used for receiving and processing the aiming indication LED light source indication area and range shot and identified by the high-definition camera, controlling the motor control assembly to guide the infrared temperature measurement module to move and adjusting the focal length of the electric focusing lens, so that the aiming indication LED light source indication area and range move to the laser spot range; the power meter protection controller is also used for receiving and processing the laser temperature detected by the infrared temperature measurement module and controlling the laser enable signal assembly to output/turn off the laser enable signal when the laser temperature meets/does not meet the requirements.
Preferably, in the above protection device for a ten-kilowatt-level laser power meter, the power meter protection controller is further configured to receive and process the laser temperature detected by the infrared temperature measurement module, calculate a predetermined temperature according to the laser temperature by using a moving average method, and control the laser enable signal component to output/turn off the laser enable signal when the predetermined temperature meets/does not meet a requirement.
Preferably, in the above protection device for a ten-kilowatt-level laser power meter, the water flow detection sensing component adopts an electromagnetic flow sensor, and outputs a 4-20MA analog quantity signal to the power meter protection controller; the infrared temperature measurement module adopts an infrared temperature measurement sensor and transmits a temperature value to the power meter protection controller through a network interface; the high-definition camera adopts a high-resolution camera module; the touch display component is responsible for displaying information and inputting information; the motor control assembly comprises a stepping motor, a stepping motor driving circuit and a gear transmission structure; the CPU of the power meter protection controller adopts a high-performance embedded CPU for real-time control and high-performance data processing; the power meter protection controller comprises two net ports, one net port is connected to the water-cooled machine, and the other net port is connected to the infrared temperature measurement module; the power meter protection controller comprises an AD sampling interface connected to the electromagnetic flow sensor; the power meter protection controller comprises two high-speed USB interfaces, and the two high-speed USB interfaces are respectively connected with the laser power meter and the high-definition camera; the power meter protection controller comprises a serial port which is connected to the laser and is used for setting the output power value and the waveform of the laser; the laser enabling signal assembly outputs a 24V IO laser enabling signal connected with a laser enabling end, and the power meter protection controller controls the 24V IO laser enabling signal to control the laser to emit light and shut off the light; the power meter protection controller outputs PWM modulation signals to the stepping motor driving circuit, the stepping motor drives the gear transmission structure, and the gear transmission structure guides the infrared temperature measurement module.
Preferably, the control portion further includes a speaker assembly, and the power meter protection controller controls the speaker assembly to output a prompt voice when the data of the detection portion received and processed meets or fails to meet the requirement.
The invention further aims to provide a laser power test system for actively protecting the normal work of the myriawatt-level laser power meter in real time.
In order to achieve the above further object, the technical scheme adopted by the invention is a myriawatt-level laser power test system, which comprises a laser and a laser power meter, wherein the laser power meter adopts a water cooling device for water cooling and heat dissipation, and the water cooling device comprises a water cooler, cooling water and a cooling water channel; the laser power test system also comprises a myriawatt-level laser power meter protection device which does not comprise an infrared temperature measurement module, the laser power meter protection device is connected with the water-cooled machine and the laser through a communication interface, and a water flow detection sensing assembly of the laser power meter protection device is connected between the water-cooled machine and a cooling water channel of the laser power meter; the laser power test system comprises the following steps when in laser power test:
s1, setting the temperature of the water cooler by the laser power meter protection device;
s2, detecting the water flow of the cooling water by the laser power meter protection device;
s3, when the cooling water flow does not meet the requirement, the laser power meter protection device closes the laser and executes the step S2;
s4, when the cooling water flow meets the requirement, the laser power meter protection device turns on a laser, and the laser emits laser spots to the detection area of the laser power meter; (ii) a
S5, detecting the size and the position of a laser spot by the laser power meter protection device;
s6, when the size and the position of the laser spot do not meet the requirements, the laser power meter protection device closes the laser;
and S7, when the size and the position of the laser spot meet the requirements, the laser power meter performs a laser power test.
In a further preferred technical solution, the above-mentioned laser power test system includes the above-mentioned protection device for a kilowatt-level laser power meter including an infrared temperature measurement module, and when the laser power test system performs a laser power test, the laser power test system further includes the following steps:
s8, the laser power meter protection device detects the aiming indication LED light source indication area and range;
s9, the laser power meter protecting device guides the infrared temperature measuring module to move and adjusts the focal length of the electric focusing lens, so that the aiming indication LED light source indication area and range move to the laser spot range;
s10, detecting the laser temperature by the laser power meter protection device;
s11, when the laser temperature meets the requirement, executing a step S10;
and S12, when the laser temperature does not meet the requirement, the laser power meter protection device closes the laser.
Preferably, in the above-mentioned system for testing a laser power at a level of ten-thousand watts, after the laser power meter protection device turns on the laser in step S4, the laser outputs at a low power; when the laser spot size and position satisfy the requirements in the step S7, directly executing step S8; in the step S9, after the indication area and range of the aiming indication LED light source are moved into the laser spot range, the laser outputs a power value according to the requirement, and the laser power meter performs a laser power test.
Preferably, in the above system for testing a laser power at a level of ten-thousand watts, the step S11: when the laser temperature meets the requirement, the laser power meter protection device calculates a pre-judgment temperature by using a moving average method according to the laser temperature, when the pre-judgment temperature meets the requirement, the step S10 is executed, and when the pre-judgment temperature does not meet the requirement, the laser power meter protection device closes the laser.
Preferably, in the above system for testing the laser power in the myriawatt level, the moving average method is a first moving average method or a second moving average method, and the predicted temperature is the laser temperature after 3 seconds.
Preferably, in the above-mentioned system for testing a laser power at a kilowatt level, the protection device of the laser power meter adopts a box structure, one end of the box is provided with a fixture for fixing laser power meters with different diameters, the other end of the box is provided with a fixing mechanism for fixing a laser output head, and a high-definition camera is installed above the fixing mechanism; the power meter protection controller and the touch display assembly are arranged on the left side surface of the box body; the infrared temperature measuring module is arranged at the middle lower part of the box body.
The invention has the following beneficial effects: the cooling water flow of the laser power meter and the size and the position of a laser spot in a detection area of the laser power meter are monitored in an active real-time mode, so that the laser power meter is protected from being burnt out; the temperature of a detection area of the laser power meter is monitored in an active real-time mode, and the light emitting of the laser is controlled according to the trend of temperature change and/or a temperature threshold and the flow of cooling water, so that the laser power meter is protected from being burnt out.
[ description of the drawings ]
Fig. 1 is a schematic diagram of a structure of a protection device of a myriawatt-level laser power meter.
Fig. 2 is a schematic diagram of infrared temperature detection of a protective device of a myriawatt-level laser power meter.
FIG. 3 is a diagram of a basic protection laser power test procedure of a myriawatt-level laser power test system.
FIG. 4 is a diagram of a step of testing infrared temperature measurement protection laser power of a myriawatt-level laser power testing system.
Fig. 5 is a schematic structural diagram of a myriawatt-level laser power testing system.
FIG. 6 is a flow chart of an active real-time protection laser power test of a myriawatt level laser power test system.
[ detailed description ] embodiments
The invention is further described with reference to the following examples and with reference to the accompanying drawings.
In the present invention, a server is a computer or apparatus that provides and manages network resources on a network, and a terminal may refer to various types of devices including, but not limited to, wireless phones, cellular phones, laptop computers, multimedia wireless devices, wireless communication Personal Computer (PC) cards, Personal Digital Assistants (PDAs), external or internal modems, and the like. A client device, i.e., a terminal, can be any data device that communicates with a server over a wireless channel and/or over a wired channel, e.g., fiber optic or coaxial cables. A terminal can have a variety of names such as mobile station, mobile device, mobile unit, mobile phone, remote station, remote terminal, remote unit, user device, user equipment, handheld device, etc. Different terminals may be incorporated into one system. Terminals may be mobile or stationary and may be dispersed throughout a communication network.
Example 1
This embodiment realizes a ten-kilowatt level laser power meter protection device.
Fig. 1 is a schematic diagram of an architecture of a protection device for a kilowatt-level laser power meter, and as shown in fig. 1, the protection device for the kilowatt-level laser power meter of the embodiment includes a detection portion and a control portion; the laser power meter adopts a water cooling device for water cooling and heat dissipation, and the water cooling device comprises a water cooling machine, cooling water and a cooling water channel; the detection part comprises a water flow detection sensing assembly and a high-definition camera; the control part comprises a power meter protection controller, a touch display component and a laser enable signal component; the water flow detection sensing assembly is connected between the water cooler and the cooling water channel of the laser power meter and is used for monitoring the cooling water flow in real time; the touch display assembly is used for man-machine interaction operation; the high-definition camera is used for shooting and identifying laser spots; the laser enabling signal assembly is used for outputting/turning off a laser enabling signal to rapidly turn on/off a laser; the power meter protection controller is used for receiving and processing a cooling water flow signal detected by the water flow detection sensing assembly and controlling the laser enabling signal assembly to output/turn off a laser enabling signal when the cooling water flow meets/does not meet the requirement; the power meter protection controller is also used for receiving and processing the laser spots shot and identified by the high-definition camera and controlling the laser enabling signal assembly to output/turn off the laser enabling signal when the size and the position of the laser spots meet/do not meet the requirements.
Fig. 2 is a schematic diagram of detecting an infrared temperature of a protection device of a myriawatt-level laser power meter, as shown in fig. 2, in a further preferred technical scheme, the protection device of the myriawatt-level laser power meter according to the embodiment further includes an infrared temperature measuring module in the detection portion; the control part also comprises a motor control assembly; the infrared temperature measurement module is used for measuring the laser temperature in a non-contact remote manner, and is provided with an electric adjustable-focus lens and an aiming indication LED light source for clearly indicating the detection area and range of the electric adjustable-focus lens of the infrared temperature measurement module; the motor control assembly is used for accurately adjusting the pointing angle of the infrared temperature measurement assembly; the high-definition camera is also used for shooting, identifying, aiming and indicating an LED light source indication area and range; the power meter protection controller is also used for receiving and processing the aiming indication LED light source indication area and range shot and identified by the high-definition camera, controlling the motor control assembly to guide the infrared temperature measurement module to move and adjusting the focal length of the electric focusing lens, so that the aiming indication LED light source indication area and range move to the laser spot range; the power meter protection controller is also used for receiving and processing the laser temperature detected by the infrared temperature measurement module and controlling the laser enable signal assembly to output/turn off the laser enable signal when the laser temperature meets/does not meet the requirements.
Preferably, in the above protection device for a ten-kilowatt-level laser power meter, the power meter protection controller is further configured to receive and process the laser temperature detected by the infrared temperature measurement module, calculate a predetermined temperature according to the laser temperature by using a moving average method, and control the laser enable signal component to output/turn off the laser enable signal when the predetermined temperature meets/does not meet a requirement.
Preferably, in the above protection device for a ten-kilowatt-level laser power meter, the water flow detection sensing component adopts an electromagnetic flow sensor, and outputs a 4-20MA analog quantity signal to the power meter protection controller; the infrared temperature measurement module adopts an infrared temperature measurement sensor and transmits a temperature value to the power meter protection controller through a network interface; the high-definition camera adopts a high-resolution camera module; the touch display component is responsible for displaying information and inputting information; the motor control assembly comprises a stepping motor, a stepping motor driving circuit and a gear transmission structure; the CPU of the power meter protection controller adopts a high-performance embedded CPU for real-time control and high-performance data processing; the power meter protection controller comprises two net ports, one net port is connected to the water cooling machine, and the other net port is connected to the infrared temperature measurement module; the power meter protection controller comprises an AD sampling interface connected to the electromagnetic flow sensor; the power meter protection controller comprises two high-speed USB interfaces, and the two high-speed USB interfaces are respectively connected with the laser power meter and the high-definition camera; the power meter protection controller comprises a serial port which is connected to the laser and is used for setting the output power value and the waveform of the laser; the laser enabling signal assembly outputs a 24V IO laser enabling signal connected with a laser enabling end, and the power meter protection controller controls the 24V IO laser enabling signal to control the laser to emit light and shut off the light; the power meter protection controller outputs PWM modulation signals to the stepping motor driving circuit, the stepping motor drives the gear transmission structure, and the gear transmission structure guides the infrared temperature measurement module.
Preferably, the control portion further includes a speaker assembly, and the power meter protection controller controls the speaker assembly to output a prompt voice when the detected portion data received and processed meets/does not meet the requirement.
Example 2
This embodiment realizes a ten-kilowatt level laser power test system.
Fig. 3 is a diagram of a basic protection laser power test procedure of a myriawatt-level laser power test system, and as shown in fig. 3, the myriawatt-level laser power test system of the present embodiment includes a laser and a laser power meter, wherein the laser power meter employs a water cooling device to perform water cooling heat dissipation, and the water cooling device includes a water cooling machine, cooling water and a cooling water channel; the laser power test system further comprises the myriawatt-level laser power meter protection device which does not comprise the infrared temperature measurement module and is described in the embodiment 1, the laser power meter protection device is connected with the water-cooled machine and the laser through a communication interface, and a water flow detection sensing component of the laser power meter protection device is connected between the water-cooled machine and a cooling water channel of the laser power meter; the laser power test system comprises the following steps when in laser power test:
s1, setting the temperature of the water cooler by the laser power meter protection device;
s2, detecting the water flow of the cooling water by the laser power meter protection device;
s3, when the cooling water flow does not meet the requirement, the laser power meter protection device closes the laser and executes the step S2;
s4, when the cooling water flow meets the requirement, the laser power meter protection device turns on a laser, and the laser emits laser spots to the detection area of the laser power meter; (ii) a
S5, detecting the size and the position of a laser spot by the laser power meter protection device;
s6, when the size and the position of the laser spot do not meet the requirements, the laser power meter protection device closes the laser;
and S7, when the size and the position of the laser spot meet the requirements, the laser power meter performs a laser power test.
Fig. 4 is a diagram of a step of testing an infrared temperature measurement protection laser power of a myriawatt-level laser power testing system, as shown in fig. 4, in a further preferred technical solution, in this embodiment, the myriawatt-level laser power testing system includes the myriawatt-level laser power meter protection device including the infrared temperature measurement module described in the above embodiment 1, and the step of performing a laser power test by the above laser power testing system further includes:
s8, the laser power meter protection device detects the aiming indication LED light source indication area and range;
s9, the laser power meter protection device guides the infrared temperature measurement module to move and adjusts the focal length of the electric focusing lens, so that the aiming indication LED light source indication area and range move to the laser spot range;
s10, detecting the laser temperature by the laser power meter protection device;
s11, when the laser temperature meets the requirement, executing the step S10;
and S12, when the laser temperature does not meet the requirement, the laser power meter protection device closes the laser.
Preferably, in the above-mentioned system for testing a laser power at a level of ten-thousand watts, after the laser power meter protection device turns on the laser in step S4, the laser outputs at a low power; when the laser spot size and position satisfy the requirements in the step S7, directly executing step S8; after the pointing indication LED light source indication area and range are moved to the laser spot range in the step S9, the laser outputs according to the required power value, and the laser power meter performs the laser power test.
Preferably, in the system for testing a myriawatt level laser power, the step S11: when the laser temperature meets the requirement, the laser power meter protection device calculates a prejudgment temperature by using a moving average method according to the laser temperature, when the prejudgment temperature meets the requirement, the step S10 is executed, and when the prejudgment temperature does not meet the requirement, the laser power meter protection device closes the laser.
Preferably, in the above system for testing the laser power in the myriawatt level, the moving average method is a first moving average method or a second moving average method, and the predicted temperature is the laser temperature after 3 seconds.
Preferably, in the system for testing myriawatt-level laser power, the laser power meter protection device is of a box structure, one end of the box is provided with a clamp for fixing laser power meters with different diameters, the other end of the box is provided with a fixing mechanism for fixing a laser output head, and a high-definition camera is mounted above the fixing mechanism; the power meter protection controller and the touch display assembly are arranged on the left side surface of the box body; the infrared temperature measuring module is arranged at the middle lower part of the box body.
Example 3
This embodiment realizes a ten-thousand watt level laser power meter protection device.
The conventional ten-kilowatt level laser power meter is expensive, generally adopts a water cooling mode to dissipate heat, and also has a method of protecting the laser power meter by controlling the light emission of a laser through detecting water flow. However, these methods are passive protection methods, and when the detection area of the laser power meter continuously receives the high-energy power density laser, the laser power meter can only passively receive the energy of the laser, and cannot tell whether the continuous reception of the high-energy laser will cause the power meter to be burned out. In view of the above problems, it is desirable to design an apparatus and method for protecting a laser power meter from significant loss. In the embodiment, the temperature of the detection area of the laser power meter is monitored in an active real-time mode, and the light emitting of the laser is controlled according to the trend of temperature change and/or a temperature threshold and the flow of cooling water, so that the laser power meter is protected from being burnt out.
Fig. 1 is a schematic diagram of an architecture of a protection device for a kilowatt-level laser power meter, and as shown in fig. 1, the protection device for the kilowatt-level laser power meter mainly comprises two parts.
First, the control part: the power meter protection control device comprises a power meter protection controller, a touch display assembly, a motor control assembly and a laser enabling control. The power meter protection controller: the test system is a core component of the test system, is responsible for receiving signals of various sensors and controlling a laser, a water cooling machine and an infrared temperature measurement module. A touch display component: the system is responsible for displaying power detection information, temperature information, water flow information, laser state information, settable temperature and input of various control instructions. The motor control assembly: the infrared temperature measurement module mainly comprises a stepping motor, a motor driving circuit and a gear transmission structure, and is mainly used for accurately adjusting the pointing angle of the infrared temperature measurement module. Laser enable control: the power meter protection controller can output a 24V laser enabling control signal, the laser can emit light only after receiving the enabling signal, and the light emitting of the laser can be quickly closed through the enabling signal.
Second, the detection part: the device comprises a water flow detection sensing assembly, an infrared temperature measurement module and a high-definition camera. Water flow detection sensing component: an electromagnetic flow sensor is connected between a water cooler and a laser power meter cooling water channel, water flow can be monitored in real time, and 4-20MA analog quantity signals are output to a power meter protection controller. The infrared temperature measurement module: the infrared temperature measuring sensor is adopted, has a non-contact remote temperature measuring function, is provided with an electric focusing lens and an aiming indication LED light source, can clearly display a detection area and a detection range, and can transmit a temperature value to the power meter protection controller through a network interface. High-definition camera: adopt the high resolution module of making a video recording, mainly shoot the laser facula picture, calculate the facula diameter, still can acquire infrared temperature measurement module and aim at and instruct LED light source instruction light scope, guide infrared temperature measurement module's removal.
The working principle of the protective device for the myriawatt-level laser power meter is as follows: before the laser emits light, the power meter protection controller is firstly communicated with the water chiller to enable the water chiller to set a temperature suitable for stable work of the power meter, and the laser power meter is protected by detecting the water flow of the water chiller; when the laser emits light, the power meter protection controller can calculate the laser spot diameter through an image acquired by the high-definition camera, when the laser spot diameter is too small, a tester can be reminded by voice, and when the laser spot diameter is smaller than a certain threshold value, a power supply relay of the laser can be directly controlled to close the laser; by detecting the diameter and the position of the laser spot, a stepping motor connected with the infrared temperature measurement module can be controlled, the infrared temperature measurement module points to the spot area, and a lens of the infrared temperature measurement module can be electrically adjusted, so that the temperature detection area falls within the laser spot range, and the temperature in the laser spot area can be accurately measured; along with the gradual increase of the light emitting energy of the laser, the power meter protection controller protects the laser power meter through the temperature detected in real time, and when the temperature change trend is monitored to be too fast or the temperature exceeds the lower limit of a set threshold, a tester can be reminded in a voice mode; and when the predicted temperature value exceeds the set temperature threshold value after 3 seconds or the temperature exceeds the set threshold value high limit, the laser is disconnected to enable the enabling light-emitting signal of the laser to be directly closed, and the laser is closed, so that the laser power meter is protected from being burnt out.
Example 4
This embodiment realizes a ten-kilowatt level laser power test system.
The system for testing the myriawatt-level laser power comprises the myriawatt-level laser power meter protection device in the embodiment 3; the laser power meter is cooled by a water cooler; a laser is also included.
Fig. 5 is a schematic structural diagram of a myriawatt-level laser power testing system, and as shown in fig. 5, the myriawatt-level laser power testing system of the present embodiment adopts a box structure, one end of which is provided with a fixing clamp of a laser power meter, which is suitable for laser power meters with different diameters, the other end of which is provided with a fixing mechanism of a laser output head, and a high-definition camera is installed above the fixing mechanism. The high-definition camera is connected to the power meter protection controller through a USB data line. The power meter protection controller and the touch display assembly are installed on the left side face of the box body. The infrared temperature measurement module is arranged at the middle lower part of the box body and is connected to the stepping motor through a gear transmission mechanism, the stepping motor is connected to the power meter protection controller, and the power meter protection controller controls the rotation of the stepping motor through a PWM signal. The infrared temperature measurement module is connected to the power meter protection controller through a network cable, the power meter protection controller obtains temperature data through the network, and meanwhile, the focal length of the lens of the infrared temperature measurement module can be controlled. The A/D interface of the power meter protection controller is connected to an external electromagnetic flow sensor and used for acquiring water flow data of the water cooler, and meanwhile, the A/D interface is connected to the water cooler through a network cable and can set the temperature of the water cooler on line in real time. The power meter protection controller is connected to the laser power meter through the USB port, and can read the power value in real time. The power meter protection controller is connected to the laser by using a serial port and an IO interface.
In the myriawatt-level laser power test system, the CPU of the power meter protection controller adopts a high-performance embedded CPU, so that real-time control and high-performance data processing are met. The power meter protection controller is provided with 2 net ports, one net port is used for being connected to a water cooling machine, and the other net port is connected to an infrared temperature measurement module. An AD sampling interface of the power meter protection controller is connected to the electromagnetic flow sensor, and water flow data can be obtained in real time. The power meter protection controller is provided with 2 high-speed USB interfaces for connecting the laser power meter and the high-definition camera. The power meter protection controller is connected to the laser through a serial port and mainly sets power values and waveforms required by the output of the laser. The power meter protection controller can output 24V IO signals to the laser, the signals are connected to the enabling end of the laser, and light emitting and light turning-off of the laser can be controlled by controlling the signals. The power meter protection controller outputs PWM modulation signals to the stepping motor driving circuit so as to drive the stepping motor to rotate by a certain angle, and the pointing angle of the infrared temperature measurement module can be controlled through a gear transmission structure connected to the stepping motor. The touch display component of the power meter protection controller is used for displaying working state information such as temperature, water flow, power value and the like, can also be used for setting related settings such as temperature alarm threshold values and the like, and can send out instructions for controlling the laser and the infrared module. The loudspeaker assembly is used for voice prompt of detection personnel.
Fig. 2 is a schematic diagram of infrared temperature detection of a protection device of a myriawatt-level laser power meter, and as shown in fig. 2, the automatic laser spot aiming process of an infrared temperature measurement module of the myriawatt-level laser power test system in the embodiment is as follows:
1. the laser firstly outputs a low-power laser, and a common laser spot is put in the central area of a laser power meter;
2. the high-definition camera can calculate the diameter of the laser spot according to the known distance from the camera to the power meter and the area of the spot area;
3. starting an aiming indication LED light source LED green indication light of the infrared temperature measurement module, and capturing the relative position of the LED indication light and a laser spot by a camera;
4. the power meter protection controller can drive the stepping motor to move the infrared temperature measurement module to point to the position of the laser spot according to the position of the LED indicating light;
5. after the infrared temperature measurement module moves in place, the electric focusing lens of the infrared temperature measurement module can be controlled, so that the LED indicating light falls into the laser spot range.
Under the condition that automatic aiming is not ideal, the LED indicating light of the infrared temperature measuring module can be manually controlled to fall into the laser spot range through the touch display assembly.
Fig. 6 is a flow chart of active real-time protection laser power testing of a myriawatt-level laser power testing system, and as shown in fig. 6, the temperature detection and control flow of the power meter of the myriawatt-level laser power testing system of the present embodiment is as follows:
1. setting the temperature of a water cooler on the touch display assembly, and starting the water cooler;
2. detecting water flow through an electromagnetic flow sensor;
3. if the water flow does not meet the set requirements, displaying a prompt on an interface, prompting a detector by using voice, and not allowing laser to emit light;
4. if the water flow meets the set requirement, setting a low-power value of the laser on the interface, outputting an enabling signal to the laser, and outputting laser by the laser at the moment;
5. the power meter protection controller acquires a laser spot image through a high-definition camera, and the diameter of a spot can be calculated according to an image recognition algorithm;
6. and judging whether the diameter of the light spot meets the required range, if not, prompting detection personnel by voice, simultaneously turning off the enabling signal of the laser, and turning off the laser of the laser.
7. If the laser spot meets the requirement, LED indicating light of the infrared temperature measurement module is started, and a PWM signal is output to the stepping motor driver by comparing the position of the LED indicating light in the image with the position of the laser spot, so that a gear transmission mechanism connected with the stepping motor is driven to move the infrared temperature measurement module to point to the position of the laser spot;
8. and the power meter protection controller controls the electric focusing lens of the infrared temperature measurement module according to the size of the diaphragm of the LED indicating light, so that the LED indicating light falls into the laser spot.
9. And controlling the laser to output according to the required power value at the interface of the touch display assembly.
10. The power meter protection controller reads the temperature measured by the infrared temperature measurement module in real time;
11. judging whether the temperature value of the detection area of the power meter exceeds a temperature threshold value, if so, immediately closing an enabling signal of the laser, and closing the laser to emit light;
12. if the temperature does not exceed the threshold value, monitoring the trend of temperature change in real time, and adopting a moving average prediction method (a primary or secondary moving average method) to prejudge; and immediately turning off the enabling signal of the laser to protect the laser power meter if the predicted temperature value possibly exceeds the temperature threshold value.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware related to instructions of a computer program, which can be stored in any computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and additions can be made without departing from the principle of the present invention, and these should also be considered as the protection scope of the present invention.
Claims (10)
1. A protection device for a myriawatt-level laser power meter comprises a detection part and a control part; the laser power meter adopts a water cooling device for water cooling and heat dissipation, and the water cooling device comprises a water cooling machine, cooling water and a cooling water channel; the method is characterized in that: the detection part comprises a water flow detection sensing assembly and a high-definition camera; the control part comprises a power meter protection controller, a touch display assembly and a laser enabling signal assembly; the water flow detection sensing assembly is connected between the water cooler and the cooling water channel of the laser power meter and is used for monitoring the cooling water flow in real time; the touch display assembly is used for man-machine interaction operation; the high-definition camera is used for shooting and identifying laser spots; the laser enabling signal component is used for outputting/turning off a laser enabling signal to rapidly turn on/off a laser; the power meter protection controller is used for receiving and processing a cooling water flow signal detected by the water flow detection sensing assembly and controlling the laser enabling signal assembly to output/turn off a laser enabling signal when the cooling water flow meets/does not meet the requirement; the power meter protection controller is also used for receiving and processing the laser spot shot and identified by the high-definition camera and controlling the laser enabling signal assembly to output/turn off the laser enabling signal when the size and the position of the laser spot meet/do not meet the requirements; the detection part also comprises an infrared temperature measurement module; the control part also comprises a motor control assembly; the infrared temperature measurement module is used for measuring the laser temperature in a non-contact remote distance and is provided with an electric adjustable-focus lens and an aiming indication LED light source for clearly indicating the detection area and range of the electric adjustable-focus lens of the infrared temperature measurement module; the motor control assembly is used for accurately adjusting the pointing angle of the infrared temperature measurement assembly; the high-definition camera is also used for shooting, identifying, aiming and indicating an LED light source indication area and range; the power meter protection controller is also used for receiving and processing the aiming indication LED light source indication area and range shot and identified by the high-definition camera, controlling the motor control assembly to guide the infrared temperature measurement module to move and adjusting the focal length of the electric focusing lens, so that the aiming indication LED light source indication area and range move into the laser spot range; the power meter protection controller is also used for receiving and processing the laser temperature detected by the infrared temperature measurement module and controlling the laser enabling signal assembly to output/turn off the laser enabling signal when the laser temperature meets/does not meet the requirement.
2. The wanwatt level laser power meter protection device according to claim 1, characterized in that: the power meter protection controller is also used for receiving and processing the laser temperature detected by the infrared temperature measurement module, calculating a pre-judgment temperature by using a moving average method according to the laser temperature, and controlling the laser enable signal assembly to output/turn off the laser enable signal when the pre-judgment temperature meets/does not meet the requirements.
3. The wanwatt level laser power meter protection device according to claim 1, characterized in that: the water flow detection sensing assembly adopts an electromagnetic flow sensor and outputs a 4-20MA analog quantity signal to the power meter protection controller; the infrared temperature measurement module adopts an infrared temperature measurement sensor and transmits a temperature value to the power meter protection controller through a network interface; the high-definition camera adopts a high-resolution camera module; the touch display component is responsible for displaying information and inputting information; the motor control assembly comprises a stepping motor, a stepping motor driving circuit and a gear transmission structure; the CPU of the power meter protection controller adopts a high-performance embedded CPU for real-time control and high-performance data processing; the power meter protection controller comprises two net ports, one net port is connected to the water cooling machine, and the other net port is connected to the infrared temperature measurement module; the power meter protection controller comprises an AD sampling interface connected to the electromagnetic flow sensor; the power meter protection controller comprises two high-speed USB interfaces, and the two high-speed USB interfaces are respectively connected with the laser power meter and the high-definition camera; the power meter protection controller comprises a serial port which is connected to the laser and is used for setting the output power value and the waveform of the laser; the laser enabling signal assembly outputs a 24V IO laser enabling signal connected with a laser enabling end, and the power meter protection controller controls the 24V IO laser enabling signal to control the laser to emit light and shut off the light; the power meter protection controller outputs PWM modulation signals to a stepping motor driving circuit, the stepping motor drives a gear transmission structure, and the gear transmission structure guides the infrared temperature measurement module.
4. A myriawatt level laser power meter protection device according to claim 3, characterized in that: the control part also comprises a horn assembly, and the power meter protection controller receives and processes the detection part data and controls the horn assembly to output prompt voice when the detection part data meet or do not meet the requirements.
5. A myriawatt-level laser power test system comprises a laser and a laser power meter, wherein the laser power meter adopts a water cooling device for water cooling and heat dissipation, and the water cooling device comprises a water cooling machine, cooling water and a cooling water channel; the method is characterized in that: the laser power test system further comprises the myriawatt-level laser power meter protection device as claimed in claim 1, wherein the laser power meter protection device is connected with the water-cooled machine and the laser through a communication interface, and a water flow detection sensing assembly of the laser power meter protection device is connected between the water-cooled machine and a cooling water channel of the laser power meter; the laser power test system comprises the following steps when in laser power test:
s1, setting the temperature of the water cooler by the laser power meter protection device;
s2, detecting the water flow of the cooling water by the laser power meter protection device;
s3, when the cooling water flow does not meet the requirement, the laser power meter protection device closes the laser and executes the step S2;
s4, when the cooling water flow meets the requirement, the laser power meter protection device turns on the laser,
the laser emits a laser spot to the detection area of the laser power meter;
s5, detecting the size and the position of a laser spot by the laser power meter protection device;
s6, when the size and the position of the laser spot do not meet the requirements, the laser power meter protection device closes the laser;
and S7, when the size and the position of the laser spot meet the requirements, the laser power meter performs a laser power test.
6. The wanwatt level laser power test system of claim 5, wherein: the laser power test system comprises the protection device of the myriawatt-level laser power meter in claim 1, and when the laser power test system performs laser power test, the laser power test system further comprises the following steps:
s8, the laser power meter protection device detects the aiming indication LED light source indication area and range;
s9, the laser power meter protecting device guides the infrared temperature measuring module to move and adjusts the focal length of the electric focusing lens, so that the aiming indication LED light source indication area and range move to the laser spot range;
s10, detecting the laser temperature by the laser power meter protection device;
s11, when the laser temperature meets the requirement, executing a step S10;
and S12, when the laser temperature does not meet the requirement, the laser power meter protection device closes the laser.
7. The wanwatt level laser power test system of claim 6, wherein: after the laser power meter protection device turns on the laser in the step S4, outputting the laser at low power; when the laser spot size and position in the step S7 meet the requirements, directly executing a step S8; and step S9, after the indication area and range of the aiming indication LED light source are moved into the range of the laser spot, the laser outputs a power value according to the requirement, and the laser power meter performs a laser power test.
8. The wanwatt level laser power test system according to any one of claims 6 or 7, wherein the step S11: when the laser temperature meets the requirement, the laser power meter protection device calculates a pre-judgment temperature by using a moving average method according to the laser temperature, when the pre-judgment temperature meets the requirement, the step S10 is executed, and when the pre-judgment temperature does not meet the requirement, the laser power meter protection device closes the laser.
9. The wanwatt level laser power test system of claim 8, wherein: the moving average method is a primary moving average method or a secondary moving average method, and the predicted temperature is a laser temperature after 3 seconds.
10. The wanwatt level laser power test system of claim 5, wherein: the laser power meter protection device adopts a box body structure, one end of the box body is provided with a clamp for fixing laser power meters with different diameters, the other end of the box body is provided with a fixing mechanism for fixing a laser output head, and a high-definition camera is arranged above the fixing mechanism; the power meter protection controller and the touch display assembly are arranged on the left side surface of the box body; the infrared temperature measurement module is arranged at the middle lower part of the box body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110419535.2A CN113203473B (en) | 2021-04-19 | 2021-04-19 | Myriawatt-level laser power meter protection device and laser power test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110419535.2A CN113203473B (en) | 2021-04-19 | 2021-04-19 | Myriawatt-level laser power meter protection device and laser power test system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113203473A CN113203473A (en) | 2021-08-03 |
| CN113203473B true CN113203473B (en) | 2022-06-21 |
Family
ID=77027557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110419535.2A Active CN113203473B (en) | 2021-04-19 | 2021-04-19 | Myriawatt-level laser power meter protection device and laser power test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113203473B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116625553B (en) * | 2023-07-19 | 2023-09-29 | 中国工程物理研究院应用电子学研究所 | Water absorption type full-absorption high-energy laser power energy measuring device and method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0089437A1 (en) * | 1982-03-23 | 1983-09-28 | Majestic Wiley Contractors Limited | Method of and apparatus for measuring the power output of lasers |
| CN101458067A (en) * | 2008-12-31 | 2009-06-17 | 苏州大学 | Laser flare measuring device and measuring method thereof |
| CN102062635A (en) * | 2010-12-02 | 2011-05-18 | 北京心润心激光医疗设备技术有限公司 | Laser power monitoring device |
| CN102192706A (en) * | 2010-03-12 | 2011-09-21 | 国家纳米科学中心 | Device and method for in situ measurement of energy distribution of focused laser faculae |
| CN103926057A (en) * | 2013-11-14 | 2014-07-16 | 中国电子科技集团公司第十一研究所 | Laser damage resistance testing system |
| CN106768309A (en) * | 2016-12-09 | 2017-05-31 | 武汉凌云光电科技有限责任公司 | A kind of adaptive mechanism for protecting laser power meter |
| CN207649765U (en) * | 2017-12-30 | 2018-07-24 | 深圳市创鑫激光股份有限公司 | A kind of laser power meter protective device and Laser Power Measuring System |
| CN109297591A (en) * | 2018-10-15 | 2019-02-01 | 武汉锐科光纤激光技术股份有限公司 | Myriawatt power meter |
| CN110488503A (en) * | 2019-09-24 | 2019-11-22 | 上海飞博激光科技有限公司 | A kind of beam energy is distributed adjustable loop laser export structure |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7307255B2 (en) * | 2003-06-16 | 2007-12-11 | White Box, Inc. | Laser system |
| US8571077B2 (en) * | 2010-08-31 | 2013-10-29 | First Solar, Inc. | System and method for laser modulation |
| CN107764579A (en) * | 2017-12-01 | 2018-03-06 | 天津东方锐镭科技有限责任公司 | A kind of full-automatic strike-machine test system of superpower laser |
| CN108195463B (en) * | 2017-12-30 | 2020-11-24 | 深圳市创鑫激光股份有限公司 | Laser power test system, method and storage medium |
| CN208998931U (en) * | 2018-10-22 | 2019-06-18 | 大族激光科技产业集团股份有限公司 | Laser protector |
| CN210198563U (en) * | 2019-06-10 | 2020-03-27 | 厦门市承谱科学仪器有限公司 | Real-time monitoring laser energy device |
| CN210625848U (en) * | 2019-09-29 | 2020-05-26 | 吉林省栅莱特激光科技有限公司 | Small-sized integrated portable 1060nm laser power meter |
| CN112229506B (en) * | 2020-09-22 | 2023-03-24 | 中国科学院空天信息创新研究院 | Laser testing device for myriawatt-level high-power integrating sphere |
-
2021
- 2021-04-19 CN CN202110419535.2A patent/CN113203473B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0089437A1 (en) * | 1982-03-23 | 1983-09-28 | Majestic Wiley Contractors Limited | Method of and apparatus for measuring the power output of lasers |
| CN101458067A (en) * | 2008-12-31 | 2009-06-17 | 苏州大学 | Laser flare measuring device and measuring method thereof |
| CN102192706A (en) * | 2010-03-12 | 2011-09-21 | 国家纳米科学中心 | Device and method for in situ measurement of energy distribution of focused laser faculae |
| CN102062635A (en) * | 2010-12-02 | 2011-05-18 | 北京心润心激光医疗设备技术有限公司 | Laser power monitoring device |
| CN103926057A (en) * | 2013-11-14 | 2014-07-16 | 中国电子科技集团公司第十一研究所 | Laser damage resistance testing system |
| CN106768309A (en) * | 2016-12-09 | 2017-05-31 | 武汉凌云光电科技有限责任公司 | A kind of adaptive mechanism for protecting laser power meter |
| CN207649765U (en) * | 2017-12-30 | 2018-07-24 | 深圳市创鑫激光股份有限公司 | A kind of laser power meter protective device and Laser Power Measuring System |
| CN109297591A (en) * | 2018-10-15 | 2019-02-01 | 武汉锐科光纤激光技术股份有限公司 | Myriawatt power meter |
| CN110488503A (en) * | 2019-09-24 | 2019-11-22 | 上海飞博激光科技有限公司 | A kind of beam energy is distributed adjustable loop laser export structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113203473A (en) | 2021-08-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10271020B2 (en) | Imaging system employing fixed, modular mobile, and portable infrared cameras with ability to receive, communicate, and display data and images with proximity detection | |
| CN113203473B (en) | Myriawatt-level laser power meter protection device and laser power test system | |
| US20110285857A1 (en) | Optical testing apparatus and testing method thereof | |
| CN204087290U (en) | Cable tunnel intelligent patrol detection device | |
| CN103335676A (en) | Novel cable detection information acquisition system based on mixed ranging of infrared sound waves | |
| CN102798516B (en) | Equipment for measuring parameters of optical device | |
| CN111726162A (en) | Optical fiber breakpoint detection device, detection system and detection method | |
| CN207923292U (en) | The latent oil sniffing robot and latent oil detection system of for transformer detection | |
| CN104515616A (en) | Temperature monitoring and inspecting system of substation primary equipment | |
| CN108507725B (en) | Sulfur hexafluoride gas leakage automatic detection device | |
| CN108828338B (en) | External shunt detection device and method with temperature monitoring function | |
| CN205408031U (en) | Defeated power transformation and distribution device's intelligent monitoring system | |
| CN110340889A (en) | The detection device of transformer | |
| CN203443672U (en) | Transformer equipped with infrared temperature measuring device | |
| CN110501797B (en) | Infrared lens device capable of automatically detecting and identifying view field | |
| CN105547408A (en) | Transformer oil level monitoring system based on power equipment infrared image | |
| CN109580643B (en) | Portable material microstructure defect detection device | |
| CN110954163B (en) | Patrol and examine cable temperature and humidity measurement system based on built-in temperature and humidity sensor robot | |
| CN211262489U (en) | Transmission line cable joint temperature on-line monitoring system | |
| CN209087158U (en) | Object early warning system waterborne | |
| CN114279572A (en) | Electrical cabinet automatic inspection system based on infrared temperature measurement imaging | |
| CN208953122U (en) | Noise detection apparatus | |
| CN109297376A (en) | A kind of sled test system of near field detection imaging fuse | |
| CN106354173A (en) | Sensitivity attenuation testing method, device and system | |
| CN109946546A (en) | A kind of the degradation system and method for excessive heating protection of photoelectrical coupler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201821 room j2018, building 6, No. 1288, Yecheng Road, Jiading District, Shanghai Patentee after: Shanghai Feibo Laser Technology Co.,Ltd. Address before: 201821 room j2018, building 6, No. 1288, Yecheng Road, Jiading District, Shanghai Patentee before: SHANGHAI FEIBO LASER TECHNOLOGIES Co.,Ltd. |