CN106949973A - The hand-held detection means of equipment heating defect based on infrared principles - Google Patents

Abstract

The invention discloses a hand-held detection device for heating defects of electric power equipment based on the principle of infrared, which includes a detection device body and a power module, a detection module, a positioning module and a protection module installed on the body; the detection module includes a controller and a Infrared module and image processing module connected to the controller, the positioning module includes a positioning chip and a GIS database module connected with the positioning chip, the protection module includes a cooling module and a dust removal module, and the power supply module is connected to the The detection module, the positioning module, and the protection module are connected; the infrared module includes a two-color temperature measurement probe, and the image processing module includes a thermal imaging processing module and a visible light image processing module. The invention utilizes thermal image recognition and the induction recognition principle of an infrared sensor, can detect subtle thermal state changes of equipment, accurately reflect internal and external heating conditions of equipment, has high reliability, and is very effective in discovering hidden dangers of equipment.

Description

Hand-held detection device for heating defects of electric power equipment based on infrared principle

technical field

The invention relates to the technical field of electric power maintenance detection devices, in particular to a hand-held detection device for heating defects of electric power equipment based on the infrared principle.

Background technique

Infrared temperature measurement technology is a high-tech technology for diagnosing heating defects of power equipment. It can detect, deal with and prevent major accidents in time. Infrared side detection technology has a series of advantages such as non-contact, real-time fast, intuitive image, high accuracy, wide application, etc. It provides an advanced means for monitoring the operation status of power supply equipment. The application of infrared detection technology in the power industry is of great significance for improving the reliability and effectiveness of electrical equipment, improving the economic benefits of operation, and reducing maintenance costs. Therefore, infrared temperature measurement has been widely used in power systems. However, all of the currently used professional temperature measurement equipment is too large and the number of configurations is limited. They are generally not carried during routine equipment inspections, and cannot be measured in time when equipment is found to be abnormal.

Patent No. 201320171824.6 discloses an infrared temperature sensor device for online temperature measurement of GIS equipment, which belongs to the technical field of temperature measurement devices for GIS equipment. The device includes a metal shell, a sealing cover, etc.; the metal shell has a circular opening and protrudes outwards to ensure a safe distance between the metal conductor and the probe, and at the same time, it should meet the distance coefficient of the infrared temperature sensor for the measured object. Conditions: the central axis of the opening of the sealing cover plate is aligned with the center of the measured area, the diameter of the round hole and the screw hole specification are consistent with the screw processing of the sensor probe; the infrared temperature sensor probe is coated with sealant and screwed into the cover Plate; place the rubber ring in the card slot where the metal shell and the cover are combined and apply sealant, and then fix the cover to the metal shell with screws. The patent has simple structure, convenient installation, moderate volume, economical and practical, and the sealant and cover plate design effectively solve the problems of sealing and installation position, which is of great significance to improve the reliability of electrical equipment operation.

The patent No. 201620146324.0 discloses a UAV electric temperature measurement infrared imaging photoelectric pod, including a casing, the two sides of the casing are provided with flow guide devices, and the lower end of the casing is provided with a detection device. The lower end of the detection device is provided with detection heads at equal intervals, the upper end of the casing is provided with a connecting device, the inner bottom of the casing is provided with a deck, the upper end of the deck is provided with a fixed sleeve, and the fixed sleeve is provided with a There is an output pipe, and the end of the output pipe away from the deck is provided with a data concentrating device, the upper end of the data concentrating device is provided with a data processing device, and the upper end of the data processing device is provided with a thermal imaging processing device through a connecting pipe, so The upper end of the thermal imaging processing device is provided with a data sending and receiving device. The patent processes the data through the data processing device and transmits it to the thermal imaging processing device, and finally transmits the data through the data transceiver device, which is suitable for electric temperature measurement of drones, meets various needs of people, and is suitable for promotion.

The patent No. 201310080745.9 discloses a technical field of infrared thermometer verification, especially relates to a complete set of infrared thermometer verification devices, which are equipment for verifying various performance indicators of infrared thermometers. The invention includes the following parts: a three-dimensional motion system, a three-dimensional motion control and recording device, a heating source loading platform and a target surface. The invention has the characteristics of high degree of automation, strong practicability, novel design, simple operation, etc., and can test various performance indexes of infrared thermometers with different models, specifications and shapes. It solves the problem of the distance ratio of the infrared thermometer and the verification of the accuracy of the collimator, makes the measured value of the infrared thermometer traceable, enables the infrared thermometer used in the production field to be effectively monitored, and ensures the use of electrical equipment The detection data of the monitoring equipment is accurate and reliable.

However, the infrared detection function in the above solution is relatively single, and does not meet the requirement of portability. For the convenience and safety of electric power maintenance work, a new type of temperature detection device integrating safety, convenience, electric inspection and communication is needed.

Contents of the invention

The purpose of the present invention is to provide a hand-held detection device for heating defects of electric power equipment based on the principle of infrared, which uses thermal image recognition and the induction recognition principle of infrared sensors to detect subtle changes in the thermal state of the equipment and accurately reflect the internal and external heating conditions of the equipment , high reliability, very effective for discovering hidden dangers of equipment.

The technical solution adopted in order to realize the purpose of the present invention is: a hand-held detection device for heating defects of electric power equipment based on the infrared principle, including a detection device body and a power module, a detection module, a positioning module and a protection module installed on the body; The detection module includes a controller and an infrared module and an image processing module respectively connected with the controller, the positioning module includes a positioning chip and a GIS database module connected with the positioning chip, and the protection module includes a cooling module and a dust removal module. module, the power module is respectively connected with the detection module, the positioning module, and the protection module; the infrared module includes a two-color temperature measurement probe, and the image processing module includes a thermal imaging processing module and a visible light image processing module.

Further, the two-color temperature measurement probe includes an optical fiber two-color temperature measurement probe or an optical fiber colorimetric temperature measurement probe.

Further, the detection device body is disposed in a protective case, and the protective case is provided with a belt buckle.

Further, a handle is provided on the body of the detection device, and a double-layer lining is provided on the handle.

Further, the power module adopts a lithium battery rechargeable type, and the power module is provided with a charging interface and an indicator light.

Further, the power module adopts a photovoltaic charging type, and a charging indicator light is set on the power module.

Further, the controller includes a CPU unit, a data acquisition card and a network database connector respectively connected to the CPU unit, the input end of the data acquisition card is connected to the image module, the diagnostic module and the infrared The modules are connected, the output end of the data acquisition card is connected to the network database connector, and the network database connector is connected to the network server remotely and wirelessly.

Further, the positioning chip includes a GPS chip or a Beidou navigation chip.

Further, the cooling module includes a water cooling module or an air cooling module.

Further, the dust removal module includes an air sweeper.

The beneficial effects of the present invention are mainly reflected in the following aspects:

1) The present invention can realize portable hand-held operation and quick response. The device can quickly provide temperature measurement. In the time that a traditional thermocouple can be used to read a leakage connection point, the temperature of almost all connection points can be read with the infrared temperature measurement module. In addition, because the infrared temperature measurement module is solid, light and does not need to It is easy to put in the protective leather case at any time, so it can be carried during factory inspections and daily inspections. At the same time, the device is also equipped with a positioning module, which can realize real-time monitoring of operators in the substation central control room, facilitate communication and contact, and increase work efficiency. and security.

2) The infrared detection of this device has the advantage of high precision, usually the precision is within one percent error range, this performance is particularly important in preventive maintenance, such as monitoring harsh production conditions and will cause equipment damage or shutdown In the event of a special event, since most equipment and plants operate 365 days, downtime equates to lost revenue. To prevent such losses, it is necessary to scan all on-site electronic equipment - circuit breakers, transformers, fuses, switches, buses and switchboards for hot spots. . The infrared temperature measurement module of this device can quickly detect small changes in operating temperature, and solve the problem when it is in its infancy, reducing the cost and maintenance range caused by equipment failure.

3) This device has high security. Different from the contact temperature measurement module, the infrared temperature measurement module can safely read the target temperature that is inaccessible or inaccessible. The staff can read the target temperature within the range allowed by the instrument, and the non-contact temperature measurement can also be used in unsafe places. Or in areas where contact temperature measurement is difficult, such as near steam valves or heating furnaces, there is no need to take the risk of burning your fingers inadvertently when contacting temperature measurement. Accurate measurement of the temperature of the supply/return air outlet 25 feet above the head is enough As easy as measuring at hand.

4) This device has the advantage of intuitive visual detection. The device can convert this invisible "thermal image" into a visible light image by using thermal imaging technology through the analysis of infrared signals, and directly display it through the display device, so that the test effect is intuitive, the sensitivity is high, and the subtleties of the equipment can be quickly detected. The thermal state change of the device accurately reflects the internal and external heating conditions of the device, has high reliability, and is very effective in discovering hidden dangers of the device. Therefore, the present invention has comprehensive detection, guidance, protection, and positioning functions, and is worthy of widespread promotion and use.

Description of drawings

Fig. 1 is a schematic structure diagram of the present invention.

detailed description

Embodiment one

As shown in Figure 1, the hand-held detection device for heating defects of electric power equipment based on the infrared principle includes a detection device body and a power module 1, a detection module 2, a positioning module 12 and a protection module 13 installed on the body; the detection module 2 includes a controller 3 and an infrared module 4 and an image processing module 5 that are respectively connected with the controller 3, the positioning module 12 includes a positioning chip 6 and a GIS database module 7 connected with the positioning chip 6, the protection module 13 includes a cooling module 8 and a dust removal module 9, and the power supply The module 1 is connected to the detection module 2, the positioning module 3, and the protection module 4 respectively; the infrared module includes a two-color temperature measurement probe, and the image processing module 5 includes a thermal imaging processing module 10 and a visible light image processing module 11.

The application principle of the present invention is that objects with a temperature above absolute zero will radiate infrared rays due to their own molecular motion. After the power signal radiated by the object is converted into an electrical signal by the infrared detector, the output signal of the imaging device can completely simulate the spatial distribution of the surface temperature of the scanned object one by one. After being processed by the electronic system, it is transmitted to the display screen and obtained The thermal image corresponding to the heat distribution on the surface of the object. Using this method, it is possible to realize the long-distance thermal state image imaging and temperature measurement of the target and analyze and judge.

The core of the present invention lies in the function of the infrared module of the infrared module. Infrared detection is a high-tech detection technology of on-line monitoring (without power failure), which integrates photoelectric imaging technology, computer technology, and image processing technology. (infrared radiation), and display its thermal image on the fluorescent screen, so as to accurately judge the temperature distribution on the surface of the object, which has the advantages of accuracy, real-time, and rapidity. Due to the movement of its own molecules, any object continuously radiates infrared heat energy outward, thus forming a certain temperature field on the surface of the object, commonly known as "thermal image". Infrared diagnostic technology absorbs this infrared radiation energy to measure the temperature of the equipment surface and the distribution of the temperature field, so as to judge the heating condition of the equipment. The test equipment using infrared diagnostic technology and the image processing module can use thermal imaging technology to convert this invisible "thermal image" into a visible light image, so that the test effect is intuitive, the sensitivity is high, and the subtle thermal state changes of the equipment can be detected. It accurately reflects the internal and external heating conditions of the equipment, has high reliability, and is very effective in discovering hidden dangers of equipment.

The infrared module of the present invention includes a two-color temperature-measuring probe, which can be distinguished in principle. The temperature-measuring probe is divided into a single-color temperature-measuring type and a two-color temperature-measuring type. For the monochromatic temperature measurement type, when measuring temperature, the area of the target to be measured should fill the field of view of the temperature measurement module. It is recommended that the measured target size exceed 50% of the field of view. If the target size is smaller than the field of view, the background radiation energy will enter the visual and acoustic symbols of the temperature measurement module and interfere with the temperature measurement readings, causing errors. On the contrary, if the target is larger than the field of view of the temperature measurement module, the temperature measurement module will not be affected by the background outside the measurement area. For the two-color temperature measurement method, the temperature is determined by the ratio of radiant energy in two independent wavelength bands. Therefore, when the target to be measured is small, does not fill the site, and there is smoke, dust, or obstruction on the measurement path that attenuates the radiation energy, it will not affect the measurement results. Even in the case of 95% energy attenuation, the required temperature measurement accuracy can still be guaranteed. For targets that are small and moving or vibrating; sometimes move in the field of view, or may partially move out of the field of view, under these conditions, the use of two-color temperature measurement is the best choice. If it is impossible to directly aim between the temperature measurement module and the target, and the measurement channel is bent, narrow, blocked, etc., the dual-color fiber optic temperature measurement module is the best choice. This is due to its small diameter, flexibility, and ability to transmit optical radiant energy over curved, blocked, and folded channels, thus enabling measurement of targets that are difficult to access, in harsh conditions, or near electromagnetic fields.

In practice, the two-color temperature measuring probe of the present invention can use an optical fiber two-color temperature measuring probe, which is mainly suitable for reducing the measurement energy signal by smoke, dust or other particles.

The controller includes a CPU unit, a data acquisition card connected to the CPU unit, and a network database connector. The input end of the data acquisition card is connected to the image module, the diagnostic module and the infrared module, and the output end of the data acquisition card is connected to the network database connector. , the network database connector connects the network server remotely and wirelessly. The image processing module includes a thermal imaging processing module and a visible light image processing module. The thermal imaging processing module forms an image on the data acquisition card of the controller through the receiving optical system and the optical-mechanical scanning mechanism in the form of thermal radiation infrared signals, and then the controller converts the signal After pre-amplification and further amplification processing, it has the ability to see details without being disturbed by light and shade. The thermal imaging processing module normally displays a darker gray scale corresponding to a lower scene temperature; in reverse display, a darker gray scale corresponds to a higher scene temperature. For the purpose of panoramic scanning, by adding a visible light image processing module, a fusion technology of visible light and thermal imaging images is proposed. Through image registration and data fusion, a composite image with enhanced content is obtained. This comprehensive image processing method is more traditional than traditional As far as the analog image is concerned, its digital mode has strong anti-interference ability and is not affected by transmission line signal attenuation and external interference. Scanning and control platforms make infrared image processing more effective and real-time.

Since the device adopts a handheld and portable design, it is necessary to provide physical protection for the detection device body. Generally speaking, the detection device body can be arranged in a protective case, and the protective case is provided with a belt buckle, which is convenient for carrying and taking. A handle can be arranged on the detection device body, and a double-layer lining is arranged on the handle. The double-layer lining includes a cushioning surface and a non-slip surface, and the non-slip surface and the cushioning surface are connected by sewing. The anti-skid surface is made of rubber, and the surface includes several bumps and some air holes. The buffer surface is made of several pieces of cotton cloth or sponge, which are wrapped on the outer surface of the anti-slip surface. The double-layer lining includes a cushioning surface and a non-slip surface. The non-slip surface and the cushioning surface are connected by sewing, and the non-slip surface fits the user's finger surface. Several rubber bumps can play an anti-slip effect. The cushioning surface is covered on the outer surface of the non-slip surface. It is made of several pieces of cotton cloth or sponge. On the one hand, its softness can reduce the impact of external force on the fingers during use and play a cushioning effect. On the other hand, when the fingers sweat At the same time, sweat can be absorbed by the material of the buffer surface through the air holes provided on the non-slip surface, so that the anti-slip effect is more prominent. The protective cover can be double-layered in the form of outer leather and inner metal plate. The inner layer is made of shape memory alloy surface, which not only has a large amount of bending, but also has high plasticity, wear resistance and toughness, and strong adaptability. The inner lining is compatible with fingers. Adaptive curved surface for comfortable use.

The power module adopts lithium battery rechargeable type, and a charging interface and an indicator light are set on the power module. The positioning chip includes a GPS chip or a Beidou navigation chip. On the one hand, it can receive information from the GPS or Beidou navigation wireless center to achieve accurate positioning of the current location. On the other hand, the module can send the current location information to the GPS or Beidou navigation center, which is convenient The central control room of the substation uniformly carries out safety marks, laying a solid foundation for safety work. The data memory connected to the transceiver module can quickly realize the reading and storage of position information, which is convenient and quick.

The cooling module includes a water-cooling module or an air-cooling module, which can dissipate heat for the internal precision electronic components in a timely manner when the device needs to work for a long time or is in harsh working conditions, which is convenient for long-term battery life. The dust removal module includes an air purger, which can be used as an embedded part of the device or as a separate part. The main purpose is to purge when dust accumulates in the gaps of the device probe and other parts, so as not to affect the detection accuracy.

Embodiment two

The difference between the hand-held detection device for heating defects of power equipment based on the infrared principle is that in this embodiment, the two-color temperature measurement probe can use an optical fiber colorimetric temperature measurement probe, which is mainly suitable for use in noise, electromagnetic fields, vibrations and difficult conditions. close to environmental conditions, or other harsh conditions.

Embodiment two

The difference between the hand-held detection device for heating defects of power equipment based on the infrared principle is that in this embodiment, the power module adopts a photovoltaic charging type, that is, the device is powered by a photovoltaic battery charged by solar energy, and the voltage range of the battery is desirable. 4V-6V, the top surface of the device is equipped with a photovoltaic array, that is, a solar panel, which can absorb solar energy and convert it into electrical energy to supply the device, and a charging indicator light is set on the power supply.

In practical applications, especially in sealed or dangerous equipment applications (such as containers or vacuum boxes), infrared temperature measurement modules often need to observe through windows. These windows are usually made of Ge or Si materials as windows, and the opening position It is often not on the ground level and does not transmit visible light. The human eye cannot observe the target through the window. The operator often needs to hold the detection device to carry out operations in unfavorable positions such as high altitudes. Therefore, each module in the device can adopt a packaged design. Installed and fixed in the corresponding part of the detection device, each device is equipped with a protective shell to achieve effective waterproof, drop-proof, shockproof, the protective shell is coated with an insulating paint layer, which can effectively prevent the impact of high-voltage induced current on each device .

The above descriptions are only preferred embodiments of the present invention, such as the structure and composition of the device, and do not limit the present invention in any form. All simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solutions of the present invention.

Claims (10)

1. the hand-held detection means of equipment heating defect based on infrared principles, it is characterised in that：Including detection means body And power module, detection module, locating module and the protection module of installation on the body；The detection module includes control Device processed and the infrared module being connected respectively with the controller, image processing module, the locating module include positioning chip And the GIS database module being connected with the positioning chip, the protection module includes refrigerating module and dedusting module, described Power module is connected with the detection module, the locating module, the protection module respectively；The infrared module includes double-colored Temperature probe, described image processing module includes thermal imaging processing module and Visual image processing module.

2. the equipment heating defect hand-held detection means as claimed in claim 1 based on infrared principles, it is characterised in that： The double-colored temperature probe includes the double-colored temperature probe of optical fiber or fiber ratio color temperature probe.

3. the equipment heating defect hand-held detection means as claimed in claim 1 based on infrared principles, it is characterised in that： The detection means body is arranged in protective case, and the protective case sets epithelium buckled.

4. the equipment heating defect hand-held detection means as claimed in claim 1 based on infrared principles, it is characterised in that： Set on the detection means body and set on handle, the handle double-deck facings.

5. the equipment heating defect hand-held detection means as claimed in claim 2 based on infrared principles, it is characterised in that： The power module is rechargeable using lithium electricity, and charging inlet and indicator lamp are set on the power module.

6. the equipment heating defect hand-held detection means as claimed in claim 2 based on infrared principles, it is characterised in that： The power module to use and set charging indicator light on photovoltaic charged formula, the power module.

7. the hand-held detection means of equipment heating defect based on infrared principles as described in claim 5 or 6, its feature exists In：The controller includes CPU element and the data collecting card being connected respectively with the CPU element, network data base connection Device, the input of the data collecting card is connected with described image module, the diagnostic module and the infrared module, the number It is connected according to the output end of capture card with the Internet database connector, the Internet database connector long distance wireless connects net Network server.

8. the hand-held detection means of equipment heating defect based on infrared principles as described in claim 5 or 6, its feature exists In：The positioning chip includes GPS chip or Beidou navigation chip.

9. the hand-held detection means of equipment heating defect based on infrared principles as described in claim 5 or 6, its feature exists In：The refrigerating module includes water-cooled module or air cooled module.

10. the hand-held detection means of equipment heating defect based on infrared principles as described in claim 5 or 6, its feature It is：The dedusting module includes air purging device.