Remote laser heating system and control method

Abstract

The invention discloses a remote laser heating system and a control method, and belongs to the field of power equipment heating defect simulation devices, the system comprises a three-dimensional motion platform, a laser, an infrared thermal imager and a rotating mechanism; the rotating mechanism is installed on the three-dimensional motion platform, the laser device and the infrared thermal imager are installed on the front face and the back face of a base of the rotating mechanism respectively, the laser device comprises an indicating laser device and a heating laser device, and the central axis of laser emitted by the heating laser device coincides with the central axis of a light inlet optical path of the infrared thermal imager; the three-dimensional motion platform is used for adjusting the output direction of the laser; the rotating mechanism is used for switching the positions of the laser and the infrared thermal imager; according to the invention, the rotating structure is arranged, so that the heating laser and the measuring light path of the infrared thermal imager are coaxial, and the database is established to record the heating requirement and the heating process parameters, so that the database can be directly called to carry out remote laser heating control during the equipment heating defect simulation period.

Description

Technical Field

[0001] The invention relates to the field of heating defect simulation devices for electric power equipment, and in particular to a remote laser heating system and a control method. Background Art

[0002] The most common defect of high-voltage electrical equipment during operation is heating defect (current-induced heating and voltage-induced heating), which accounts for about 93% of various faults. Accurately discovering heating defects and judging the severity of defects are of great significance for determining the maintenance strategy of heating equipment and ensuring the safe and stable operation of equipment and power grid. According to the "Q / GDW13372.13 State Grid Corporation Skilled Personnel Position Competency Training Specification", infrared temperature measurement technology, as a safe, efficient and mature means of detecting and diagnosing heating faults of power equipment at the production site, has become a professional skill that maintenance technicians "should know and master".

[0003] In order to carry out infrared thermal imaging technology training, it is necessary to set up a heating source on the non-powered high-voltage electrical equipment used for training, such as winding heating wire or open flame type defect settings. Shanghai Judian Technology and many other companies have successively launched power equipment heating defect simulation devices based on heat sources. The device deploys a heat source with independent temperature control on the equipment to achieve heating defect simulation.

[0004] The heat source is usually a resistive heating element, which is easy to control and adjust, does not pollute the environment, and has been widely used. Temperature-controlled heating film provides a new solution for the simulation of heating defects in power equipment. The heating film is a translucent polyester film that can generate heat when powered on. It is made of special conductive ink and metal current-carrying strips that are processed and hot-pressed between insulating polyester films. The electric heating film system consists of a power supply, a thermostat, a connector, an insulating layer, an electric heating film, and a finishing layer. When working, the electric heating film is used as the heating element to send heat into the space in the form of radiation.

[0005] The current methods for simulating heating defects in equipment mainly include heating defect simulation devices for power equipment based on heat sources and temperature-controlled heating film technology. For the former, the deployment of heat sources requires customized adaptation to various types of power equipment, which requires a large amount of modification work, and the equipment that has undergone cavity modification is difficult to undertake other types of training tasks, resulting in a waste of equipment resources. For the latter, due to the special material form of the heating film, it is easy to identify the deployment location at the training site, but it is difficult to solve the problems of randomness of training content and concealment of assessment content. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention intends to use infrared laser technology that is invisible to the naked eye to simulate the heating defects of power equipment, and to remotely heat the heat-prone parts of the power equipment for training by arranging lasers in concealed locations.

[0007] To achieve the above object, the present invention adopts the following technical solution.

[0008] A first aspect of the present invention provides a remote laser heating system, the system comprising: a three-dimensional motion platform, a laser, an infrared thermal imager and a rotating mechanism;

[0009] The rotating mechanism is installed on a three-dimensional motion platform, including a rotating mechanism base and a rotating mechanism rotating axis. The laser and the infrared thermal imager are respectively installed on the front and back sides of the rotating mechanism base, wherein the laser includes a certain number of indicator lasers and a heating laser, the indicator laser lenses are evenly distributed around the heating laser lenses, and the central axis of the laser emitted by the heating laser coincides with the central axis of the light path of the infrared thermal imager;

[0010] The three-dimensional motion platform is used to adjust the output direction of the laser, and the rotating mechanism is used to switch the positions of the laser and the infrared thermal imager, wherein the heating laser is used to heat the target device part, the indicating laser is used to measure the distance and indicate the contour of the target device part, and the infrared thermal imager is used to measure the temperature of the heated part;

[0011] The laser and infrared thermal imager can be flipped 180° through a rotating mechanism and then exchanged. The central axis of the laser and the central axis of the light path are kept coincident before and after flipping, which is used for alternate heating and temperature measurement of the target equipment part.

[0012] Optionally, the three-dimensional motion platform includes a yaw axis turntable, a pitch axis turntable and a fixed base, wherein the yaw axis turntable is installed on the fixed base and can rotate 360° on the fixed base; the pitch axis turntable is installed on the yaw axis turntable and can rotate according to a specified angle.

[0013] Optionally, the rotating mechanism includes a rotating mechanism base and a rotating mechanism rotating axis. The rotating mechanism is installed on a pitch axis turntable, and the rotating mechanism base can be rotated 180° through the rotating mechanism rotating axis.

[0014] Optionally, the laser includes a heating laser and an indicator laser. A certain number of indicator lasers are installed around the heating laser lens. The indicator lasers are evenly distributed around the heating laser lens. The visible laser emitted by the indicator laser is parallel to the high-power invisible laser emitted by the heating laser. The heating laser is used to output a heating laser in the infrared band to heat the target device part, and the indicator laser is used to output a visible laser to indicate the outer contour of the heating laser and measure the straight-line distance from the heated part to the laser.

[0015] Optionally, the heating laser is provided with a beam expander for expanding the diameter of the heating laser to 10 mm to 20 mm.

[0016] Optionally, the beam expander is provided with a heat dissipation system for temperature control of the optical system of the beam expander;

[0017] The heat dissipation system adopts water cooling and air cooling and drying methods.

[0018] A second aspect of the present invention provides a remote laser heating control method, which is applied to the above remote laser heating system. The method comprises the following steps:

[0019] Step 1: Fix the remote laser heating system;

[0020] Step 2: Establish a laser heating database to record the location of the equipment to be heated and the corresponding heating requirements, including the ambient temperature before heating and the heating target temperature;

[0021] Step 3: Turn on the indicator laser, manually adjust the posture of the three-dimensional motion platform, so that the indicator laser is output to the part of the equipment to be heated, and record the posture adjustment parameters of the three-dimensional motion platform in the laser heating database to achieve a one-to-one correspondence between the position of the part of the equipment to be heated and the posture adjustment parameters;

[0022] Step 4: Turn on the heating laser, heat the target device part for a set time, control the rotating mechanism base to rotate 180°, and measure the temperature of the heated part with an infrared thermal imager. If the measured temperature does not reach the heating target temperature, control the rotating mechanism base to rotate 180° in the opposite direction, so that the laser heats the target device part again for the same set time. Repeat this cycle until the measured temperature of the heated part reaches the heating target temperature, and record the laser heating time and the temperature rise data of the target device part.

[0023] Step 5: Analyze the positions of different parts of the equipment to be heated and the corresponding heating process parameters, the heating process parameters include laser heating time and temperature rise data of the target equipment parts, and establish a laser heating time database to record the positions of different parts of the equipment to be heated and the corresponding heating process parameters;

[0024] Step 6: Repeat steps 2 to 5 to record the positions of all equipment parts to be heated and the corresponding posture adjustment parameters, heating requirements and heating process parameters;

[0025] Step 7: During the equipment heating defect simulation, the laser heating database and the laser heating time database are called to perform remote laser heating control.

[0026] Optionally, in step 4, during the heating process, the infrared thermal imager is always turned on and in measurement mode, but the temperature is read only when it is aimed at the heated device part.

[0027] Optionally, in step 4, the laser and the infrared thermal imager are periodically rotated and switched to alternately heat and measure the temperature of the target device part.

[0028] Optionally, the method further comprises using an image acquisition device to acquire an image indicating that the laser hits the target device, so as to provide a reference for laser positioning.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] By setting up a rotating structure, the heating laser and the infrared thermal imager's measuring optical path are made coaxial, which solves the problem that the heating laser cannot be coaxial with the infrared thermal imager under different distance conditions.

[0031] By adopting the interval heating method, the temperature rise caused by laser heating within the set time under different starting temperature conditions is obtained.

[0032] Image acquisition of the indicating laser is achieved through image recognition, providing a reference for precise laser positioning.

[0033] The use of a laser beam expander can reduce the energy per unit area of ​​the output laser while increasing the heating area. This is a completely different technical approach from traditional lasers that pursue high energy and small beam expansion radius.

[0034] By setting the time interval heating method, the thermal effect of high-power heating laser on the beam expander can be reduced, ensuring the performance of the beam expander while increasing the service life of the beam expander.

[0035] The heat dissipation system of the beam expander adopts water cooling and air cooling and drying. That is, water cooling is used to achieve short-term and efficient cooling, while air cooling and drying are used to process the residual water on the optical lens to avoid the temperature rise caused by water absorbing infrared lasers. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is the overall structural diagram of the remote laser heating system in the present invention. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The embodiments described in this application are only part of the embodiments of the present invention, not all of the embodiments. Based on the spirit of the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention. In view of the shortcomings of the prior art, the present invention intends to use infrared laser technology that is invisible to the naked eye to simulate the heating defects of power equipment, and remotely heat the parts of the power equipment for training that are prone to heating by arranging lasers in concealed positions.

[0038] Example 1

[0039] like Figure 1 As shown, the present invention provides a remote laser heating system, which includes: a three-dimensional motion platform 9, a laser 10, an infrared thermal imager 7 and a rotating mechanism;

[0040] The rotating mechanism is installed on the three-dimensional motion platform 9, including a rotating mechanism base 6 and a rotating mechanism rotating shaft 3. The laser 10 and the infrared thermal imager 7 are respectively installed on the front and back sides of the rotating mechanism base 6, wherein the laser 10 includes a certain number of indicator lasers 1 and a heating laser 2, the lenses of the indicator laser 1 are evenly distributed around the lens of the heating laser 2, and the central axis of the laser emitted by the heating laser 2 coincides with the central axis of the light path of the infrared thermal imager 7;

[0041] The three-dimensional motion platform 9 is used to adjust the output direction of the laser 10, and the rotating mechanism is used to switch the position of the laser 10 and the infrared thermal imager 7, wherein the heating laser 2 is used to heat the target device part, the indicating laser 1 is used to measure the distance and indicate the contour of the target device part, and the infrared thermal imager 7 is used to measure the temperature of the heated part;

[0042] The three-dimensional motion platform 9 is used to adjust the output direction of the laser 10, and the rotating mechanism is used to switch the position of the laser 10 and the infrared thermal imager 7, wherein the heating laser 2 is used to heat the target device part, the indicating laser 1 is used to measure the distance and indicate the contour of the target device part, and the infrared thermal imager 7 is used to measure the temperature of the target device part;

[0043] The laser 10 and the infrared thermal imager 7 can be flipped 180° by the rotating shaft 3 of the rotating mechanism and then exchanged. The central axis of the laser and the central axis of the light path are kept coincident before and after flipping, so as to alternately heat and measure the temperature of the target device part.

[0044] In a further preferred but non-limiting embodiment, the three-dimensional motion platform 9 includes a fixed base 8, a yaw-axis turntable 5 and a pitch-axis turntable 4, wherein the yaw-axis turntable 5 is installed on the fixed base 8 and can rotate 360° on the fixed base 8; the pitch-axis turntable 4 is installed on the yaw-axis turntable 5 and can rotate according to a specified angle.

[0045] In a further preferred but non-limiting embodiment, the rotating mechanism base 6 is mounted on the pitch axis turntable 4 via the rotating mechanism rotating shaft 3 and can rotate 180°;

[0046] In a further preferred but non-limiting embodiment, the laser 10 includes a certain number of indicator lasers 1 and a heating laser 2. The indicator laser 1 lenses are evenly distributed around the heating laser 10 lens, and the visible laser emitted by the indicator laser 1 is parallel to the high-power invisible laser emitted by the heating laser 2; the heating laser 2 is used to output infrared heating laser to heat the target device part, and the indicator laser 1 is used to output visible laser to indicate the outer contour of the heating laser and measure the straight-line distance from the heated part to the laser.

[0047] In a further preferred but non-limiting embodiment, the target device location refers to a location that simulates heating defects of electrical equipment.

[0048] In a further preferred but non-limiting embodiment, the remote laser heating system is powered by a lithium battery to facilitate mobile operation.

[0049] In a further preferred but non-limiting embodiment, the heating laser 2 is provided with a beam expander for expanding the diameter of the heating laser to 10 mm to 20 mm.

[0050] In a further preferred but non-limiting embodiment, the beam expander is provided with a heat dissipation system to achieve temperature control of the optical system of the beam expander.

[0051] In a further preferred but non-limiting embodiment, the heat dissipation system of the beam expander is implemented by water cooling and air cooling and drying.

[0052] Example 2

[0053] Based on the system described in Example 1, the present invention provides a remote laser heating control method, which includes the following steps:

[0054] Step 1: Fix the remote laser heating system;

[0055] Step 2: Establish a laser heating database to record the location of the equipment to be heated and the corresponding heating requirements, including the ambient temperature before heating and the heating target temperature;

[0056] Step 3: Turn on the indicator laser 1, manually adjust the posture of the three-dimensional motion platform 9, so that the indicator laser is output to the part of the equipment to be heated, and record the posture adjustment parameters of the three-dimensional motion platform 9 in the laser heating database to achieve a one-to-one correspondence between the position of the part of the equipment to be heated and the posture adjustment parameters;

[0057] Step 4: Turn on the heating laser 2, and after heating the target device part for a set time, control the rotating mechanism base 6 to rotate 180°, and measure the temperature of the heated part by the infrared thermal imager 7. If the measured temperature does not reach the heating target temperature, control the rotating mechanism base 6 to rotate 180° in the opposite direction, so that the heating laser 2 heats the target device part again for the same set time, and repeat this cycle until the measured temperature of the heated part reaches the heating target temperature, and record the laser heating time and the temperature rise data of the target device part;

[0058] Step 5: Analyze the positions of different parts of the equipment to be heated and the corresponding heating process parameters, the heating process parameters include laser heating time and temperature rise data of the target equipment parts, and establish a laser heating time database to record the positions of different parts of the equipment to be heated and the corresponding heating process parameters;

[0059] Step 6: Repeat steps 2 to 5 to record the positions of all equipment parts to be heated and the corresponding posture adjustment parameters, heating requirements and heating process parameters;

[0060] Step 7: During the equipment heating defect simulation, the laser heating database and the laser heating time database are called to perform remote laser heating control.

[0061] In a further preferred but non-limiting embodiment, in step four, during the heating process, the infrared thermal imager 7 always remains in a powered-on measurement state, but only reads the temperature when it is aimed at the part of the heated device. Since the heating of the heated object under the irradiation of the heating laser is a relatively slow process, the process will last for tens to hundreds of seconds. Therefore, although the infrared thermal imager 7 cannot monitor the temperature rise in real time, it can still ensure that the temperature of the heated object is accurately obtained.

[0062] In a further preferred but non-limiting embodiment, in step 4, the laser 10 and the infrared thermal imager 7 are periodically rotated and switched to alternately heat and measure the temperature of the target device part.

[0063] In a further preferred but non-limiting embodiment, the method further includes using an image acquisition device to acquire an image indicating that the laser has hit the target device, thereby providing a reference for accurate laser positioning.

[0064] In a further preferred but non-limiting embodiment, when the operator performs the heating operation, he inputs the position of the device to be heated, and the three-dimensional motion platform 9 queries the database for automatic positioning. When the positioning accuracy is insufficient, manual fine-tuning is performed.

[0065] In a further preferred but non-limiting embodiment, in the method, establishing a laser heating database and a laser heating time database is to facilitate that in the subsequent training process, the data in the database can be directly called to heat the equipment parts to perform defect simulation without repeatedly adjusting the laser heating system.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A remote laser heating system, characterized in that: The system includes: a three-dimensional motion platform, a laser, an infrared thermal imager and a rotating mechanism; The rotating mechanism is installed on a three-dimensional motion platform, including a rotating mechanism base and a rotating mechanism rotating axis. The laser and the infrared thermal imager are respectively installed on the front and back sides of the rotating mechanism base, wherein the laser includes a certain number of indicator lasers and a heating laser, the indicator laser lenses are evenly distributed around the heating laser lenses, and the central axis of the laser emitted by the heating laser coincides with the central axis of the light path of the infrared thermal imager; The three-dimensional motion platform is used to adjust the output direction of the laser, and the rotating mechanism is used to switch the positions of the laser and the infrared thermal imager, wherein the heating laser is used to heat the target device part, the indicating laser is used to measure the distance and indicate the contour of the target device part, and the infrared thermal imager is used to measure the temperature of the heated part; The laser and infrared thermal imager can be flipped 180° through a rotating mechanism and then exchanged. The central axis of the laser and the central axis of the light path are kept coincident before and after flipping, which is used for alternate heating and temperature measurement of the target equipment part.

2. A remote laser heating system according to claim 1, characterized in that: The three-dimensional motion platform includes a yaw axis turntable, a pitch axis turntable and a fixed base, wherein the yaw axis turntable is installed on the fixed base and can rotate 360° on the fixed base; the pitch axis turntable is installed on the yaw axis turntable and can rotate according to a specified angle.

3. A remote laser heating system according to claim 1, characterized in that: The rotating mechanism comprises a rotating mechanism base and a rotating mechanism rotating axis. The rotating mechanism is installed on the pitch axis turntable. The rotating mechanism base can be rotated 180 degrees through the rotating mechanism rotating axis.

4. A remote laser heating system according to claim 1, characterized in that: The laser includes a heating laser and an indicator laser. A certain number of indicator lasers are installed around the heating laser lens. The indicator lasers are evenly distributed around the heating laser lens. The visible laser emitted by the indicator laser is parallel to the high-power invisible laser emitted by the heating laser. The heating laser is used to output a heating laser in the infrared band to heat the target device part, and the indicator laser is used to output a visible laser to indicate the outer contour of the heating laser and measure the straight-line distance from the heated part to the laser.

5. A remote laser heating system according to claim 4, characterized in that: The heating laser is provided with a beam expander for expanding the diameter of the heating laser to 10 mm to 20 mm.

6. A remote laser heating system according to claim 5, characterized in that: The beam expander is provided with a heat dissipation system for temperature control of the optical system of the beam expander; The heat dissipation system adopts water cooling and air cooling and drying methods.

7. A remote laser heating control method, applied to the remote laser heating system according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: Step 1: Fix the remote laser heating system; Step 2: Establish a laser heating database to record the location of the equipment to be heated and the corresponding heating requirements, including the ambient temperature before heating and the heating target temperature; Step 3: Turn on the indicator laser, manually adjust the posture of the three-dimensional motion platform, so that the indicator laser is output to the part of the equipment to be heated, and record the posture adjustment parameters of the three-dimensional motion platform in the laser heating database to achieve a one-to-one correspondence between the position of the part of the equipment to be heated and the posture adjustment parameters; Step 4: Turn on the heating laser, heat the target device part for a set time, control the rotating mechanism base to rotate 180°, and measure the temperature of the heated part with an infrared thermal imager. If the measured temperature does not reach the heating target temperature, control the rotating mechanism base to rotate 180° in the opposite direction, so that the laser heats the target device part again for the same set time. Repeat this cycle until the measured temperature of the heated part reaches the heating target temperature, and record the laser heating time and the temperature rise data of the target device part. Step 5: Analyze the positions of different parts of the equipment to be heated and the corresponding heating process parameters, the heating process parameters include laser heating time and temperature rise data of the target equipment parts, and establish a laser heating time database to record the positions of different parts of the equipment to be heated and the corresponding heating process parameters; Step 6: Repeat steps 2 to 5 to record the positions of all equipment parts to be heated and the corresponding posture adjustment parameters, heating requirements and heating process parameters; Step 7: During the equipment heating defect simulation, the laser heating database and the laser heating time database are called to perform remote laser heating control.

8. A remote laser control method according to claim 7, characterized in that : In step 4, during the heating process, the infrared thermal imager is always turned on for measurement, but the temperature is read only when it is aimed at the heated device part.

9. A remote laser control method according to claim 7, characterized in that : In the step 4, the laser and the infrared thermal imager are periodically rotated and switched to alternately heat and measure the temperature of the target device part.

10. A remote laser control method according to claim 7, characterized in that : The method also includes using an image acquisition device to acquire an image indicating that the laser hits the target device, so as to provide a reference for laser positioning.

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