CN101419093A - Sensing device for on-line monitoring temperature rising state for high voltage switch electrical equipment - Google Patents
Sensing device for on-line monitoring temperature rising state for high voltage switch electrical equipment Download PDFInfo
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- CN101419093A CN101419093A CNA2008102324211A CN200810232421A CN101419093A CN 101419093 A CN101419093 A CN 101419093A CN A2008102324211 A CNA2008102324211 A CN A2008102324211A CN 200810232421 A CN200810232421 A CN 200810232421A CN 101419093 A CN101419093 A CN 101419093A
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Abstract
The invention relates to the field of monitoring of safety operation of a high-voltage switch apparatus and discloses a sensing device for online monitoring of the temperature rise state of the high-voltage switch apparatus. The sensing device comprises a shell (1), an infrared thermopile probe (3) and a signal conditioning circuit board (5) which are arranged inside the shell (1) and electrically connected with each other, and an external heat source shielding cylinder (4) which is arranged on the shell (1) and faces to the infrared thermopile probe (3). The sensing device is characterized in that an optical focusing lens (6) is arranged inside the external heat source shielding cylinder (4).
Description
Technical field
The present invention relates to high-voltage switch electric appliance safe operation monitoring field, be specifically related to a kind of sensing device for on-line monitoring temperature rising state for high voltage switch electrical equipment.
Background technology
Along with China's rapid growth of economy, the scale of electric system and load also constantly increase fast, and the load level of high-tension switch electrical equipment is also more and more higher.The high-tension switch electrical equipment that is in for a long time under the higher load condition very easily occurs because of reasons such as current-carrying cause that conduction junction temperature rise is too high, thereby causes the device for switching device damage, even the accident of " burning joint operation " takes place.Therefore,, find the accident potential that it is potential early, have important economic and social benefit for the safe reliability that improves Operation of Electric Systems to the on-line monitoring of high-tension switch electrical equipment enforcement temperature rising state.
Whether the method that the on-line monitoring temperature rising state of high-tension switch electrical equipment adopts directly contacts with testee according to temperature sensing device, is divided into contact and contactless two kinds.
Chinese patent ZL200420041719.1 for example, name is called " a kind of complete switch on-line monitoring contact temperature sensing device ", has proposed a kind of state of temperature on-line monitoring method of contact.In order to solve contact temperature sensing device powerup issue, this method adopts and gets stream, rectification and filtering at bus, and all can normal power supply need guarantee that bus flows through little electric current or short circuit current flow the time, the fabrication of iron core cost costliness of using when causing power taking is unfavorable for the large tracts of land promotion and implementation; Chinese patent literature CN1400453, name is called " distributed optical fiber temperature sensing device system ", proposed a kind of light pulse of sending by laser generator enter the band bidirectional coupler optical fiber carry out thermometric, this technology is vulnerable to the influence of environment temperature, and adopt laser generator and optical fiber, cost is higher, and optical fiber has being connected of contact with the primary circuit, has increased the possibility that insulation fault occurs artificially.
The patent No. is 02258947.3, and patent is called " based on the infrared measurement of temperature sensing device of software compensation ", adopts principle of infrared radiation, has proposed a kind of on-line monitoring temperature rising state for high voltage switch electrical equipment temperature measurement sensing equipment.The thermal source shielding cylinder that this patent adopts insulating material to make limits the area that the thermoelectric pile probe absorbs infrared emanation, thereby realizes the measurement of bus temperature rising state.This mode is used for 10kV and following (air insulation distance 〉=respond well when 125mm) device for switching equipment temperature rising state is monitored.Only depend on thermal source shielding cylinder restriction infrared thermopile probe to absorb the Method for Area of testee (as current carrying bus) infrared emanation, when measuring more voltage levels device for switching equipment temperature rising state, as the high-tension switch electrical equipment of 40.5kV electric pressure and above electric pressure (during air insulation required distance 〉=300mm), because of measured zone excessive, sensing device is subjected to the interference of non-measurand too serious, make measuring accuracy reduce greatly, can't satisfy measurement requirement.
' Safe Guard ' the device of ABB AB development and for example, adopt the quartz crystal surface acoustic wave device as temperature-sensing element (device), it is sticked on detected part, by its oscillation circuit of forming output frequency signal relevant with temperature, adopt the infrared modulation lift-off technology, noble potential place temperature value is sent on the infrared remote receiver at electronegative potential place.Yangzhou Polytecnical College adopts nonconducting quartz crystal sensing device to solve the high voltage isolating problem.But said method is with high costs, can't realize industrialization.
In sum, there is the shortcoming of cost costliness in the quartz crystal sensing device of ' SafeGuard ' of Chinese patent ZL200420041719.1, ZL01400453 and ABB development, Yangzhou Polytecnical College's research; More than Chinese patent ZL02258947.3 can't realize that long distance (〉 300mm reaches) high-tension switch electrical equipment state of temperature on-line monitoring problem.Therefore, reduce the hardware cost of temperature measurement sensing equipment, the antijamming capability that improves system is also realized remote on-line monitoring temperature rising state, it is had great importance in the popularization of voltage levels device for switching equipment more.
Summary of the invention
The object of the present invention is to provide a kind of sensing device for on-line monitoring temperature rising state for high voltage switch electrical equipment, its hardware cost is low, is suitable for the electric pressure height, and anti-electromagnetic interference performance is good.
For achieving the above object, the present invention is achieved by the following technical solutions: a kind of sensing device for on-line monitoring temperature rising state for high voltage switch electrical equipment, comprise shell, the infrared thermopile probe and the signal conditioning circuit plate that are electrically connected mutually in the enclosure are set, be arranged on the shell with the infrared thermopile probe over against extraneous thermal source shielding cylinder, it is characterized in that, be provided with optical focusing lens in the described extraneous thermal source shielding cylinder.
The present invention also has following characteristics:
(1) described optical focusing lens, its measuring distance distance of testee (promptly with) is 1～5000mm; Its focal length is 100～150mm; Operating wavelength range is 6～14 μ m.In addition, lens diameter 15～30mm, testee area≤300mm
2, lens probe area≤2mm
2
(2) described infrared thermopile probe, the TPS534 or the TPS334 product that adopt PerkinElmer company to produce.
(3) extraneous thermal source shielding cylinder is made by plastic insulation material.
(4) described shell adopts copper or stainless steel material to be made.
The present invention adopts optical focusing lens that infrared radiation signal is focused on, solved little (＜300mm) the problem of infrared measurement of temperature sensing device temperature measurement on-line distance, make sensing device thermometric distance increase greatly, can realize 5000mm thermometric distance, thereby make this sensing device can be widely used in more voltage levels (reaching more voltage levels) on-line monitoring temperature rising state for high voltage switch electrical equipment as 40.5kV, 126kV.Simultaneously, the sensing device shell adopts copper or stainless steel material to process, and can play the effect of electromagnetic screen, improves the anti-strong electromagnetic ability of system; The thermal source shielding cylinder adopts insulating material to make, and not only can shield the influence of extraneous thermal source infrared radiation to sensing device, also can reduce the distance between sensing device and the testee, improves measuring accuracy.The present invention has reduced the cost of sensing device effectively under the prerequisite that guarantees measuring accuracy, improved the antijamming capability of sensing device under abominable electromagnetic environment, has realized distributing rationally of sensing device.
Description of drawings
Fig. 1 is the sensing device structural representation;
Fig. 2 is an optical focusing lens thermometric synoptic diagram among Fig. 1;
Fig. 3 is the schematic block circuit diagram of signal conditioning circuit plate;
Fig. 4 is the physical circuit figure of signal conditioning circuit plate;
Fig. 5 is a sensing device practical application synoptic diagram.
Specific embodiment
Below the present invention is described in further detail by drawings and Examples.
With reference to Fig. 1, sensing device for on-line monitoring temperature rising state for high voltage switch electrical equipment of the present invention comprises: shell 1, bonnet 2, infrared thermopile probe 3, extraneous thermal source shielding cylinder 4, signal regulating panel 5 and optical focusing lens 6.Wherein: infrared thermopile probe 3 and signal conditioning circuit plate 5 are set in the shell 1, infrared thermopile probe 3 is electrically connected mutually with signal conditioning circuit plate 5, also be provided with on the shell 1 and be used for the isolated thermal-radiating extraneous thermal source shielding cylinder 4 of thermal source that disturbs, be equipped with one in the extraneous thermal source shielding cylinder 4 and be used for the infrared emanation light focusing of testee to pop one's head in 3 optical focusing lens 6 of infrared thermopile.The shell 1 usefulness fine copper or the stainless steel material of sensing device process, and can play the effect of electromagnetic screen, improve the anti-strong electromagnetic ability of system.Extraneous thermal source shielding cylinder 3 is made by plastic insulation material, and the infrared radiation of shielding external interference thermal source improves the insulating property of sensing device simultaneously to the influence of sensing device.
With reference to Fig. 2, the infrared light that testee (bus) 7 gives off focuses on the useful area of infrared thermopile probe 3 through optical focusing lens 6.Selecting for use of optical focusing lens 6: diameter is 15～30mm, focal length 100～150mm, and the wavelength coverage that can see through infrared light is 6～14 μ m.The useful area of infrared thermopile probe 2 is less than 2mm
2Thereby, can reduce the cost that infrared thermopile is popped one's head in.Testee (bus) 7 can be being that 1～5000mm adjusts, to adapt to the requirement of the exhausted distance of insulation with the distance of optical focusing lens 6.
With reference to Fig. 3, signal conditioning circuit plate theory diagram comprises: signal amplification circuit 501, thermistor signal amplifying circuit 502, voltage offset electric circuit 503, active filter circuit 504, a V/F (conversion of pressure/frequency) 505 circuit and the 2nd V/F circuit 506.Wherein, voltage offset electric circuit 503 is connected with signal amplification circuit 501; One tunnel output of infrared thermopile probe 3 connects amplifying circuit 501, power filter 504, a V/F circuit 505 successively, the temperature signal f of output testee
o3 another road outputs of infrared thermopile probe connect thermistor signal amplifying circuit 502, the 2nd V/F circuit 506 successively, the temperature signal f of output testee place environment
e
The heat radiation infrared light of testee focuses on by optical focusing lens 6, be sent to infrared thermopile probe 3, the infrared radiation that infrared thermopile probe 3 is incited somebody to action converts the voltage signal of representing the testee temperature to, the voltage signal of environment temperature is represented in thermistor output in the infrared thermopile probe 3, signal conditioning circuit plate 5 amplifies above-mentioned two kinds of faint voltage signals, convert frequency signal to after the filtering, be transported to the enterprising line data of sensing device control panel in addition and handle (comprising temperature compensation), calculate the temperature rise of testee.
With reference to Fig. 4, be that sensing device of the present invention is specifically implemented circuit.Temperature for testee, the voltage signal that the pin one of infrared thermopile probe 3 and 3 outputs are produced by the testee heat radiation, the pin one and 3 of infrared thermopile probe 3 is received the pin 3 and 2 of precision amplifier INA128PA respectively, the enlargement factor of precision amplifier can reach 10000 times, regulates enlargement factor by being connected across precision amplifier pin one and pin 8 potentiometers; Because the testee temperature is in 0～150 degree centigrade, the voltage signal of infrared thermopile probe 3 outputs is-200uV～2mV, carry out the lifting of output signal level so 5 pin of INA128PA connect the reference voltage source of a 5V, guarantee that its output voltage signal is more than 0V; In order to reduce power-supply fluctuation, utilize electric source filter circuit that tantalum electrochemical capacitor and high frequency leaded multilayer ceramic capacitor form that the positive-negative power of precision amplifier is carried out filtering to the influence of precision amplifier serviceability and the interference of output voltage signal.For the high frequency interference in the filtering voltage signal, the voltage signal of precision amplifier INA128PA pin 6 outputs is imported the pin 5 of an amplifier LM124, the fertile active low-pass filter now of the 2 rank Barts that utilize LM124 and resistance, electric capacity to form carries out the Filtering Processing of cutoff frequency for 5Hz, experiment shows, this wave filter has the good effect of improving for waveform, the voltage that wave filter output is more stable; Stable voltage signal utilizes the V/F change-over circuit of being made up of LM331 and peripheral electric capacity, resistance from pin 7 outputs of LM124 and send into the pin 7 of LM331 after the filtering, converts voltage signal to frequency signal (F
o) export from the pin 3 of LM331.For environment temperature: infrared thermopile is popped one's head in voltage that 3 built-in thermistors produce by its 2 pin output, this signal is imported the pin 3 of another LM124, the amplifying circuit that utilization is made up of LM124 and peripheral electric capacity, resistance amplifies, amplify the pin one output of back from LM124, send into the pin 7 of another LM331 after this voltage signal process RC filtering, the V/F change-over circuit that utilization is made up of LM331 and peripheral electric capacity, resistance converts voltage signal to frequency signal (F
e) export from the pin 3 of LM331.
With reference to Fig. 5, be a sensing device practical application example.When sensing device is installed, need thermoelectric pile detecting head 3 with sensing device inside, make optical focusing lens 6,, improve measuring accuracy so that receive the infrared light that testee gives off better also over against testee 7 over against testee (bus) 7.The bonnet of sensing device is provided with DIN guide rail 8, and sensing device is installed on the guide-track groove easily, and the shift position makes the infrared thermopile detecting head 3 of sensing device aim at the measurement point of testee easily.
The present invention adopts the fertile active low-pass filter now of 2 rank Barts for power frequency and high frequency interference filtering, and its cutoff frequency is 5Hz.Experiment shows, this wave filter can effectively filtering power frequency and high-frequency electromagnetic disturb, the output galvanic current is pressed signal, has improved the measuring accuracy of sensing device greatly; The application of considering sensing device is a high-tension switch electrical equipment, makes smooth in appearance in the processing of shell as far as possible; The thickness of shell is 2mm, to guarantee the durable and anti-electromagnetic interference (EMI) effect of sensing device shell.
The present invention utilizes optical lens to realize the focusing of remote infrared emanation signal, realizes the remote on-line monitoring of high-tension switch electrical equipment current carrying bus on-line monitoring temperature rising state requirement; Utilize software to finish the sensing device ambient temperature compensation, be aided with the software and hardware Anti-interference Design, methods such as system optimization configuration under assurance The measuring precision prerequisite, have improved the thermometric distance greatly, and have effectively reduced the cost of system under strong electromagnetic interference environment.
Claims (7)
1, a kind of sensing device for on-line monitoring temperature rising state for high voltage switch electrical equipment, comprise shell (1), be arranged on the infrared thermopile probe (3) and the signal conditioning circuit plate (5) that are electrically connected mutually in the shell (1), be arranged on shell (1) go up with infrared thermopile pop one's head in (3) over against extraneous thermal source shielding cylinder (4), it is characterized in that, be provided with optical focusing lens (6) in the described extraneous thermal source shielding cylinder (4).
According to the described a kind of sensing device for on-line monitoring temperature rising state for high voltage switch electrical equipment of claim 1, it is characterized in that 2, the measuring distance of described optical focusing lens (6) is 1～5000mm.
According to the described a kind of sensing device for on-line monitoring temperature rising state for high voltage switch electrical equipment of claim 1, it is characterized in that 3, the focal length of described optical focusing lens (6) is 100～150mm.
4, according to the described a kind of sensing device for on-line monitoring temperature rising state for high voltage switch electrical equipment of claim 1, the operating wavelength range of described optical focusing lens (6) is 6～14 μ m.
5, according to the described a kind of sensing device for on-line monitoring temperature rising state for high voltage switch electrical equipment of claim 1, it is characterized in that described infrared thermopile probe (3), the TPS534 or the TPS334 product that adopt PerkinElmer company to produce.
According to the described a kind of sensing device for on-line monitoring temperature rising state for high voltage switch electrical equipment of claim 1, it is characterized in that 6, the extraneous thermal source shielding cylinder of institute (4) is made by plastic insulation material.
According to the described a kind of sensing device for on-line monitoring temperature rising state for high voltage switch electrical equipment of claim 1, it is characterized in that 7, described shell (1) adopts copper or stainless steel material to be made.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008102324211A CN101419093A (en) | 2008-11-25 | 2008-11-25 | Sensing device for on-line monitoring temperature rising state for high voltage switch electrical equipment |
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| CNA2008102324211A CN101419093A (en) | 2008-11-25 | 2008-11-25 | Sensing device for on-line monitoring temperature rising state for high voltage switch electrical equipment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013149A (en) * | 2010-12-09 | 2011-04-13 | 河南汉威电子股份有限公司 | Infrared multifrequency flame detector |
| CN103674285A (en) * | 2013-11-30 | 2014-03-26 | 江苏物联网研究发展中心 | Temperature computing module and temperature computing method with self-correcting function for infrared thermopile temperature sensor |
| CN105333961A (en) * | 2015-12-07 | 2016-02-17 | 川铁电气（天津）股份有限公司 | System achieving non-contact temperature measurement of high-voltage isolating switch on basis of thermo-electric pile principle |
| WO2017080272A1 (en) * | 2015-11-13 | 2017-05-18 | 深圳通感微电子有限公司 | Self-focusing lens thermopile sensor and assembly process thereof |
| CN108418306A (en) * | 2018-03-28 | 2018-08-17 | 哈尔滨理工大学 | A kind of high-voltage switch gear control system of quick response |
| CN111854319A (en) * | 2020-07-27 | 2020-10-30 | 合肥美菱物联科技有限公司 | Refrigerator control system of movable thermopile sensor and application method |
-
2008
- 2008-11-25 CN CNA2008102324211A patent/CN101419093A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013149A (en) * | 2010-12-09 | 2011-04-13 | 河南汉威电子股份有限公司 | Infrared multifrequency flame detector |
| CN103674285A (en) * | 2013-11-30 | 2014-03-26 | 江苏物联网研究发展中心 | Temperature computing module and temperature computing method with self-correcting function for infrared thermopile temperature sensor |
| WO2015078230A1 (en) * | 2013-11-30 | 2015-06-04 | 江苏物联网研究发展中心 | Temperature computation module and temperature computation method for infrared thermopile temperature sensor with self-correction function |
| CN103674285B (en) * | 2013-11-30 | 2016-04-13 | 江苏物联网研究发展中心 | There is temperature computation module and the temperature computation method of the infrared thermopile temperature sensor of self-correcting function |
| WO2017080272A1 (en) * | 2015-11-13 | 2017-05-18 | 深圳通感微电子有限公司 | Self-focusing lens thermopile sensor and assembly process thereof |
| CN105333961A (en) * | 2015-12-07 | 2016-02-17 | 川铁电气（天津）股份有限公司 | System achieving non-contact temperature measurement of high-voltage isolating switch on basis of thermo-electric pile principle |
| CN108418306A (en) * | 2018-03-28 | 2018-08-17 | 哈尔滨理工大学 | A kind of high-voltage switch gear control system of quick response |
| CN111854319A (en) * | 2020-07-27 | 2020-10-30 | 合肥美菱物联科技有限公司 | Refrigerator control system of movable thermopile sensor and application method |
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Open date: 20090429 |