CN210833873U - System for measuring internal temperature of electrical equipment in non-invasive manner - Google Patents
System for measuring internal temperature of electrical equipment in non-invasive manner Download PDFInfo
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- CN210833873U CN210833873U CN201921565654.3U CN201921565654U CN210833873U CN 210833873 U CN210833873 U CN 210833873U CN 201921565654 U CN201921565654 U CN 201921565654U CN 210833873 U CN210833873 U CN 210833873U
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Abstract
The utility model relates to an adopt system of non-invasive mode measurement electrical equipment internal temperature. The surface of the electrical equipment is coated with a layer of carbon material; the system comprises a photoelectric detection unit, a photoelectric detection unit and a control unit, wherein the photoelectric detection unit is used for acquiring infrared radiation energy emitted by the surface of the electrical equipment coated by the carbon material and converting the infrared radiation energy into corresponding electric signals; and the processor is electrically connected with the photoelectric detection unit and used for processing and analyzing the electric signals to acquire temperature data corresponding to the electric signals. On the one hand, this application can make the emissivity on electrical equipment surface increase through the surface coating one deck carbon element material to electrical equipment to make this application needn't go deep into electrical equipment's inside, on the other hand, obtain again through the infrared energy to the surface radiation who coats the electrical equipment who coats one deck carbon element material, handle, analysis and acquire the inside temperature of electrical equipment, can make the temperature that obtains more accurate.
Description
Technical Field
The utility model relates to a power equipment technical field especially relates to an adopt system of non-invasive mode measurement electrical equipment internal temperature.
Background
The common thermal fault of the switch cabinet in the power supply industry is caused by the fact that the contact resistance is increased due to a plurality of factors such as long-time heavy-load operation of a high-voltage switch, loosening of a joint, aging of a contact, insufficient pressure of a contact surface and the like, and the temperature of the contact is further increased. The damage of the equipment caused by the thermal fault affects the life of people and the normal production of enterprises, and certain economic loss and negative influence are caused to power supply companies. The structure environment is complicated in the cubical switchboard, is not convenient for the trouble seek, still wastes a large amount of manpower, material resources.
The temperature measuring means commonly adopted in the domestic transformer substation at present are a temperature indicating color changing wax sheet method, an infrared temperature measuring method and a contact type temperature measuring resistance method. The temperature measurement error of the temperature indicating color changing wax sheet method is large, the practicability is poor, and the infrared temperature measurement method cannot monitor the high temperature in the equipment through the equipment shell; the contact temperature measuring resistance method adopted in the equipment has the problems of high voltage isolation and overheating temperature of temperature measuring devices, and the practicability is poor. The limitations of the above approaches become more and more apparent as voltage levels increase and electrical loads increase year by year.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is desirable to provide a system for measuring the internal temperature of an electrical device in a non-invasive manner.
A system for non-invasively measuring the internal temperature of an electrical device, the surface of the electrical device being coated with a layer of carbon material; the system comprises:
the photoelectric detection unit is used for acquiring infrared radiation energy emitted by the surface of the electrical equipment coated with the carbon material and converting the infrared radiation energy into corresponding electric signals;
and the processor is electrically connected with the photoelectric detection unit and used for processing and analyzing the electric signals to acquire temperature data corresponding to the electric signals.
In one embodiment, the system further comprises:
and the optical unit is arranged between the electrical equipment and the photoelectric detection unit and used for focusing the infrared radiation energy emitted from the surface of the electrical equipment and filtering out the focused stray light in the infrared radiation energy.
In one embodiment, the optical unit includes a transparent mirror, and the stray light filtered by the transparent mirror is visible light and near infrared light.
In one embodiment, the system further comprises:
and the driving unit is fixedly connected with the photoelectric detection unit and is used for driving the photoelectric detection unit to rotate along a preset direction so as to scan the infrared radiation energy emitted by the electrical equipment.
In one embodiment, the processor is further configured to issue an alert signal when the temperature inside the electrical device exceeds a preset threshold; the system further comprises:
and the warning unit is connected with the processor and used for receiving and responding to the warning signal and generating a visual and/or auditory warning signal.
In one embodiment, the alert unit includes an audio output device for generating an audible alert signal and/or a display unit for generating a visual alert signal.
In one embodiment, the display unit is a light emitting diode capable of displaying a plurality of colors.
In one embodiment, the photodetecting unit includes:
a base;
the black body is arranged on the base;
the photosensitive chip is arranged on the base around the black body; and
and the optical filter is arranged on one side of the photosensitive chip for receiving the light.
In one embodiment, the photodetection unit further includes an ambient temperature sensor, which is disposed on the base adjacent to the photosensitive chip, and is configured to acquire temperature data in the environment.
In one embodiment, the filter is a silicon dielectric filter.
According to the system for measuring the internal temperature of the electrical equipment in the non-invasive mode, the photoelectric detection unit is adopted to obtain the infrared energy radiated by the surface of the electrical equipment coated with the layer of carbon material, and then the processor is used to process and analyze the obtained infrared radiation energy; on the one hand, the surface of the electrical equipment is coated with the layer of carbon material, so that the surface emissivity of the electrical equipment is increased, the measurement of the internal temperature of the electrical equipment can be realized without going deep into the electrical equipment, and on the other hand, the obtained temperature can be more accurate by acquiring, processing and analyzing the infrared energy radiated by the surface of the electrical equipment coated with the layer of carbon material and then acquiring the internal temperature of the electrical equipment.
Drawings
FIG. 1 is a schematic diagram of a system for non-invasively measuring the internal temperature of an electrical device, in one embodiment;
fig. 2 is a schematic structural diagram of a photoelectric detection unit in an embodiment.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1, as shown in fig. 1, the present application provides a system for measuring the internal temperature of an electrical device in a non-invasive manner, wherein a surface of the electrical device 10 is coated with a layer of carbon material 102; the system may comprise a photo detection unit 20 and a processor 30; the photoelectric detection unit 20 is used for acquiring infrared radiation energy emitted by the surface of the electrical equipment 10 coated by the carbon material 102 and converting the infrared radiation energy into a corresponding electric signal; the processor 30 is electrically connected to the photodetection unit 20, and is configured to process and analyze the electrical signal to obtain temperature data corresponding to the electrical signal.
Specifically, the electrical device 10 of the present application may be a switch cabinet in the power supply industry, after being coated with a carbon material, the electric field distribution inside the switch cabinet may not be changed, and meanwhile, the surface of the switch cabinet after being coated with the carbon material also has a high emissivity. The photoelectric detection unit 20 of the present application may specifically be an infrared detector, and the model of the infrared detector may be an MLX90614 non-contact infrared temperature sensing chip, the temperature measurement range of the chip is-40 ℃ to 125 ℃, and meanwhile, an advanced low noise amplifier is further disposed in the MLX90614 non-contact infrared temperature sensing chip.
In order to enable the infrared radiation emitted from the surface of the electrical device 10 to be detected as much as possible, a layer of carbon material 102 is coated on the surface of the electrical device 10, so that the surface of the electrical device 10 has a high emissivity, and the infrared energy emitted from the coated electrical device 10 is detected and received by the photoelectric detection unit 20. Meanwhile, the infrared energy radiated by each part of the electrical equipment 10 is combined to obtain the infrared energy distribution pattern radiated by the electrical equipment 10, and an infrared thermal image about the infrared energy distribution on the surface of the electrical equipment 10 can be obtained after the receiving of the photoelectric detection unit 20 and the processing and analysis of the processor 30, and the thermal image corresponds to the thermal distribution field on the surface of the electrical equipment 10, so that the temperature anomaly point in the electrical equipment 10 can be accurately found by the method, and the temperature detection of each component in the electrical equipment 10 is realized.
To sum up, the system of this application has been guaranteed the effect of temperature measurement on the one hand, has compensatied the too high shortcoming of thermal imaging cost simultaneously again, and is more economical, simple to operate, is applicable to new cubical switchboard and dispatches from the factory the installation or to old cubical switchboard transformation, can practice thrift huge expense under the prerequisite of ensureing equipment safe operation.
Generally, all objects above absolute zero (-273 ℃) emit infrared radiation, but the nature of the object and the material covered on the surface of the object can cause the infrared radiation emitted by the object to be not easy to detect, and further cause inaccurate measured temperature; in the conventional method, the distance between the optical detection unit and the object to be measured is usually adjusted, and precisely, the distance between the probe in the optical detection unit and the object to be measured is adjusted, because the distance between the probe and the object to be measured is directly related to the diameter of the measurement shift, it is required to ensure that the object to be measured is larger than the size of the dot measured by the photoelectric detection unit, and the smaller the object to be measured is, the closer the object to be measured should be.
Specifically, referring to fig. 2, a schematic structural diagram of the photodetecting unit 20 in an embodiment is shown. The photo detection unit 20 may include an optical filter 210, a black body 220, a photo sensor chip 230 and an ambient temperature sensor 240 integrated on a base (not shown); the optical filter 210 is mainly disposed on a side of the light-sensing chip 230 receiving light, that is, a light-incident side, and the optical filter 210 may be a silicon-based optical filter; the black body 220 is mainly used for providing emissivity reference, so that the temperature inside the electrical device 10 can be obtained more accurately through the obtained infrared radiation energy; a light sensing chip 230 disposed on the base around the black body 220, and mainly configured to receive the optical signal filtered by the optical filter 210 and convert the optical signal into a corresponding electrical signal; the ambient temperature sensor 240 is primarily used to obtain the temperature in the environment, which may be used in subsequent data processing to obtain more accurate temperature data.
In one embodiment, with continuing reference to fig. 1, in order to enable the electrical device 10 to emit infrared radiation energy to be detected by the photodetecting unit 20 as much as possible, the system of the present application further includes an optical unit 40 disposed between the photodetecting unit 20 and the electrical device 10, where the optical unit 40 is configured to focus the infrared radiation energy emitted from the surface of the electrical device 10 and filter stray light in the focused infrared radiation energy. The optical unit 40 may be a transparent mirror, which can focus the infrared radiation energy of the target in its field of view. The arrangement of the optical unit 40 is specifically designed mainly depending on the distance of the probe in the photodetection unit 20 to the electrical device 10. The stray light can be visible light and near infrared light, correspondingly, the stray light to be filtered by the optical unit 40 is visible light and near infrared light, the influence of an external non-target light source on a measurement result can be reduced, according to an infrared thermal phase rule, the internal temperature of the electrical equipment 10 is combined, the actual interval of the temperature detected by the photoelectric detection unit 20 is within 300 ℃, the frequency range of the detected light can be 8-141 mu m, the spectrum of the waveband can effectively avoid the attenuation of atmospheric dust and water vapor in infrared transmission, and the photoelectric detection unit 20 has strong-purposed infrared radiation detection capability.
Further, the processing and analyzing of the electrical signal by the processor 30 may be to convert the electrical signal transmitted by the photodetection unit 20 into temperature data, perform attenuation compensation on the temperature data according to the ambient temperature and the optical device (optical unit, photodetection unit), and perform data correction according to the emissivity of the electrical device 10 and the transmittance of the optical unit 40, so as to improve the accuracy of temperature output and reduce the external interference.
In order to ensure that the photodetecting unit 20 can detect more infrared radiation energy emitted by the electrical device 10, the system of the present application is further provided with a driving unit 50, the photodetecting unit 20 is fixedly disposed on the driving unit 50, and the driving unit 50 is configured to drive the photodetecting unit 20 to rotate along a preset direction to scan the infrared radiation energy emitted by the electrical device 10. Specifically, considering that the electrical apparatus 10 is a switch cabinet having a certain length, width and height, the driving unit 50 of the present application can drive the photodetecting unit 20 to rotate along the height direction of the switch cabinet, wherein the rotation range of the driving unit 50 is 180 °. It is understood that the photodetecting unit 20 of the present application may be disposed at a plurality of positions of the electrical device 10 in order to enable the temperatures of the various elements inside the electrical device 10 to be detected and collected.
In one embodiment, with continued reference to fig. 1, the processor 30 is further configured to issue an alarm signal when the temperature inside the electrical device 10 exceeds a preset threshold; the system may further comprise an alert unit 60 coupled to the processor 30 for receiving and generating a visual and/or audible alert signal in response to the alert signal; that is to say, after receiving the warning signal, the warning unit 60 may generate only a visual warning signal, may generate only an audible warning signal, and may also generate both the visual warning signal and the audible warning signal, and accordingly, the warning unit 60 may be an audio output device (e.g., a speaker) capable of generating the audible warning signal, may be a display unit (e.g., an LED, an LCD, etc.) capable of generating the visual warning signal, and may be a unit that includes both the audio output device (e.g., the speaker) and the display unit (e.g., the LED, the LCD, etc.); in this embodiment, the warning unit 60 is a unit having both an audio output device (e.g., a speaker) and a display unit (e.g., an LED, an LCD, etc.), wherein the display unit may be an LED (light emitting diode) displaying multiple colors, and the audio output device may be a buzzer.
Specifically, the processor 30 may be internally provided with two temperature limit values T1 and T2, wherein T1 < T2, and the temperature of the electrical apparatus 10 acquired by the processor 30 is denoted as T, from which three temperature states can be divided, namely: when the temperature T is less than or equal to T1, it is determined as a normal temperature, and at this time, the processor 30 may output a first warning signal, and under the action of the first warning signal, the green light of the warning unit 60 is on, and the buzzer does not sound; when T > T2 and it is determined that the temperature is seriously high, the processor 30 may output a second warning signal, and under the action of the second warning signal, the red light in the warning unit 60 is on and the buzzer sounds; further, when T is more than T1 and less than or equal to T2, the temperature is judged to be abnormally high, at the moment, a yellow lamp in the warning unit 60 is turned on, and a buzzer sounds;
furthermore, in order to facilitate the operation and maintenance personnel to grasp the situation, the processor 30 may further send an alarm short message to the terminal device of the operation and maintenance personnel at intervals of time t through the wireless transmission network.
In one embodiment, it can be known from the foregoing description that the system of the present application can be applied to factory installation of a new switch cabinet or modification of an old switch cabinet, so that, in order to make the modification more successful, the whole system can be firstly debugged in an early operation. Specifically, during operation and debugging, a temperature calibrator MX824-J can be used for simulating high temperature generation to check the temperature measurement accuracy and alarm condition of the system.
Although not shown, the system of the present application may further include a circuit for amplifying and filtering the electrical signal converted by the photoelectric detection unit, which is not described in detail herein.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A system for non-invasively measuring the internal temperature of an electrical device, wherein the surface of the electrical device is coated with a layer of carbon material; the system comprises:
the photoelectric detection unit is used for acquiring infrared radiation energy emitted by the surface of the electrical equipment coated with the carbon material and converting the infrared radiation energy into corresponding electric signals;
and the processor is electrically connected with the photoelectric detection unit and used for processing and analyzing the electric signals to acquire temperature data corresponding to the electric signals.
2. The system of claim 1, further comprising:
and the optical unit is arranged between the electrical equipment and the photoelectric detection unit and used for focusing the infrared radiation energy emitted from the surface of the electrical equipment and filtering out the focused stray light in the infrared radiation energy.
3. The system of claim 2, wherein the optical unit comprises a light transmissive mirror that filters out stray light as visible light and near infrared light.
4. The system of claim 1, further comprising:
and the driving unit is fixedly connected with the photoelectric detection unit and is used for driving the photoelectric detection unit to rotate along a preset direction so as to scan the infrared radiation energy emitted by the electrical equipment.
5. The system of claim 1, wherein the processor is further configured to issue an alert signal when a temperature inside the electrical device exceeds a preset threshold; the system further comprises:
and the warning unit is connected with the processor and used for receiving and responding to the warning signal and generating a visual and/or auditory warning signal.
6. The system of claim 5, wherein the alert unit comprises an audio output device for generating an audible alert signal and/or a display unit for generating a visual alert signal.
7. The system of claim 6, wherein the display unit is a light emitting diode capable of displaying multiple colors.
8. The system according to any one of claims 1-7, wherein the photodetecting unit comprises:
a base;
the black body is arranged on the base;
the photosensitive chip is arranged on the base around the black body; and
and the optical filter is arranged on one side of the photosensitive chip for receiving the light.
9. The system of claim 8, wherein the photodetecting unit further comprises an ambient temperature sensor disposed on the base adjacent to the photosensitive chip for acquiring temperature data in the environment.
10. The system of claim 9, wherein the filter is a silicon dielectric filter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921565654.3U CN210833873U (en) | 2019-09-19 | 2019-09-19 | System for measuring internal temperature of electrical equipment in non-invasive manner |
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| CN201921565654.3U CN210833873U (en) | 2019-09-19 | 2019-09-19 | System for measuring internal temperature of electrical equipment in non-invasive manner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110646096A (en) * | 2019-09-19 | 2020-01-03 | 广州供电局有限公司 | Method and system for measuring internal temperature of electrical equipment in non-invasive manner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110646096A (en) * | 2019-09-19 | 2020-01-03 | 广州供电局有限公司 | Method and system for measuring internal temperature of electrical equipment in non-invasive manner |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20201012 Address after: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee after: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd. Address before: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee before: GUANGZHOU POWER SUPPLY Co.,Ltd. |
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| TR01 | Transfer of patent right |