CN110346053A - A kind of non-contact type temperature measurement devices for intelligent electric energy meter - Google Patents
A kind of non-contact type temperature measurement devices for intelligent electric energy meter Download PDFInfo
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- CN110346053A CN110346053A CN201910624974.XA CN201910624974A CN110346053A CN 110346053 A CN110346053 A CN 110346053A CN 201910624974 A CN201910624974 A CN 201910624974A CN 110346053 A CN110346053 A CN 110346053A
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- 238000009529 body temperature measurement Methods 0.000 title claims abstract description 13
- 238000005538 encapsulation Methods 0.000 claims abstract description 4
- 238000012544 monitoring process Methods 0.000 claims description 7
- 230000001012 protector Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- 230000002265 prevention Effects 0.000 claims description 3
- 230000004044 response Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004153 renaturation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
- G01J5/20—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using resistors, thermistors or semiconductors sensitive to radiation, e.g. photoconductive devices
Abstract
The present invention provides a kind of non-contact type temperature measurement devices for intelligent electric energy meter characterized by comprising thermopile sensor, thermopile sensor are encapsulated using TO-39 Can；For thermo-responsive resistance chip built-in in the shell of encapsulation；Thermopile sensor is not contacted with electric energy meter terminal seat, so reduce fixed link, when electric energy meter terminal seat is when being shaken or squeezing, and unaffected, reduction security risk.
Description
Technical field
This application involves technical field of electric power, and in particular to a kind of at low cost, arrangement space is small, can satisfy high-precision and surveys
Examination requires and the non-contact type temperature measurement devices of insulating requirements.
Background technique
Due to the high speed development of intelligent electric energy meter technology in recent years, it is desirable that intelligent electric meter meets more and more functions.
In electronic electric energy meter, the temperature measurement function of terminal base is the new function of meter, electronic type intelligent electric energy meter
Real-time monitoring, and the arrangement point by single-chip microcontroller to temperature data can be carried out to the temperature of the current terminal copper rod on terminal base
Analysis, can be to failures such as potential connection box of electric energy meter poor contact failure, terminal base overheat burning fault, residential electricity consumption load short circuits
Early warning and tripping processing are carried out, and carries out event of failure record simultaneously, subsequent accident analysis and tracing to the source can be provided reliable
Analyze data.So early warning and effectively place can be carried out to potential security risk using the temperature-monitoring function to terminal base
Reason, can avoid the generation of fire to a certain extent.Therefore the function has critically important Practical significance.
Touch sensor needs to be fixed on terminal base, when electric energy meter terminal seat is when being shaken or squeezing, connects
The sensor of touch also has hidden danger in safe insulation.
Summary of the invention
The application provides a kind of non-contact type temperature measurement devices for intelligent electric energy meter, without fixing, works as electric energy meter
Terminal base is unaffected when being shaken or squeezing, and reduces security risk.
The application provides a kind of non-contact type temperature measurement devices for intelligent electric energy meter characterized by comprising heat
Pile sensor, thermopile sensor are encapsulated using TO-39 Can；For thermo-responsive resistor core built-in in the shell of encapsulation
Piece；Thermopile sensor is not contacted with electric energy meter terminal seat.
Preferably, the thermopile sensor is the infrared thermopile sensor compatible with CMOS technology.
Preferably, the thermo-responsive resistance chip, for being compensated to environment temperature.
Preferably, the thermopile sensor is not contacted with electric energy meter terminal seat, is insulated, is met with terminal base for guaranteeing
The requirement of safe insulation.
Preferably, further includes:
The temperature obtained to thermopile sensor measurement is demarcated, and is introduced for eliminating the superior sensor of thermoelectric pile and circuit
Error, achieve the effect that accurate thermometric.
Preferably, the measurable terminal base temperature range of the temperature measuring device is 30-150 degree.
Preferably, the temperature measuring device error is less than ± 5 degree of precision.
Preferably, the temperature measuring device can be at each terminal base in electric energy meter, and electric energy meter can be according to every
The measured temperature of a terminal records following event, comprising: terminal overheat protector, terminal temperature are uneven, terminal temperature rise is transfinited.
Preferably, the terminal overheat protector event can work as electric energy meter by setting alarm temperature 1 and alarm temperature 2
A certain terminal temperature issues the user with early warning when reaching alarm temperature 1, and customer charge is directly cut off when reaching alarm temperature 2,
Ensure Electrical Safety.
Preferably, the terminal temperature imbalance event can be by the temperature value of the different terminals of monitoring, when warm between terminal
It when spending difference greater than limit value, records corresponding event and simultaneously alarms, for excluding scene due to wiring caused wiring end resistance lack of standardization
Anti-unbalance.
Preferably, the terminal temperature rise event of transfiniting can calculate temperature per minute by real-time monitoring terminal temperature value
Change rate, when temperature ramp-up rate reaches limit value, Ying Jilu event, and it is reported to electric system main website, it repairs in time, prevention
Occurred with electric fault.
The application provides a kind of non-contact type temperature measurement devices for intelligent electric energy meter, the thermopile sensor used
It being encapsulated using TO-39 Can, thermopile sensor is not contacted with the terminal base of electric energy meter, so fixed link is reduced, when
Electric energy meter terminal seat is unaffected when being shaken or squeezing, and reduces security risk.
Detailed description of the invention
Fig. 1 is sensor temperature detection principle diagram provided by the embodiments of the present application；
Fig. 2 be the invention relates to R-T table and V-T indicate be intended to；
Fig. 3 be the invention relates to thermopile sensor temperature test data；
Fig. 4 be the invention relates to terminal base and thermoelectric pile temperature measurement module.
Specific embodiment
Many details are explained in the following description in order to fully understand the application.But the application can be with
Much it is different from other way described herein to implement, those skilled in the art can be without prejudice to the application intension the case where
Under do similar popularization, therefore the application is not limited by following public specific implementation.
The application provides a kind of non-contact type temperature measurement devices of intelligent electric energy meter characterized by comprising thermoelectric pile
Sensor, thermopile sensor are encapsulated using TO-39 Can；For thermo-responsive resistance chip built-in in the shell of encapsulation；
Thermopile sensor is not contacted with electric energy meter terminal seat.
Thermopile sensor is the infrared thermopile sensor compatible with CMOS technology.With high IR response rate, Gao Chong
The features such as renaturation and high reliability, infrared response temperature coefficient is small.
Thermo-responsive resistance chip, for being compensated to environment temperature.The high precision operating amplifier that module uses ensures
Infrared measurement of temperature module is accurate.
Thermopile sensor is not contacted with electric energy meter terminal seat, is insulated for guaranteeing with terminal base, is met safe insulation
It is required that.
The temperature obtained to thermopile sensor measurement is demarcated, and is introduced for eliminating the superior sensor of thermoelectric pile and circuit
Error, achieve the effect that accurate thermometric.
The measurable terminal base temperature range of temperature measuring device is 30-150 degree, and error is less than ± 5 degree of precision,
Firstly, introducing the pin definitions of thermopile sensor, the sensor temperature detection principle diagram of Fig. 1 is seen.
1, pin 1,3 be thermopile infrared sensor voltage output pin, and output voltage is μ V magnitude, and the voltage is with tested
Object temperature changes and changes.
2, pin 2, it is resistance value, the resistance value between 2,4 feet that 4, which be the pin of built-in NTC (negative tempperature coefficient thermistor),
Change with sensor own temperature and change, which is 100K Ω at 25 DEG C.
Next temperature measuring equipment circuit theory provided by the present application is introduced.
Sensor temperature detection principle diagram is shown in Fig. 1.
AMB-TEMP, environment temperature meet ADC herein to obtain the voltage value of 2,4 feet, and are converted into resistance.
Vbias, bias voltage, depending on circuit system.IR Vout, infrared response voltage output meet ADC herein to obtain
Obtain 1,3 foot voltage values.
P1 is TPS thermopile sensor, is NTC resistance value between two feet and four feet, and resistance value varies with temperature and changes, and is led to
It crosses and is divided with resistance R3, generate AMB-TEMP voltage signal, give Chip Microcomputer A/D C and acquire and handle environment temperature is calculated
Value.P1 sensor pin 1,3 is thermopile infrared sensor voltage output pin, and output voltage is μ V magnitude, and the voltage is with quilt
It surveys object temperature variation and changes.1 foot is V+ signal, and 2 feet are V- signal.V+ signal is connected to the same phase of amplifier U1 by R4
Input terminal.V- signal is connected to the inverting input terminal of amplifier U1 by R1, at the same with biasing resistor R1, R2 and amplifier U1
Output end connection, the ratio between R2 and R1 resistance value are amplifier magnification ratio, and C2, C3 are filter capacitor.Pass through above-mentioned amplifier U1's
Same phase, inverting input terminal circuit design form signal amplification circuit.Amplified signal IR_OUT passes through the output of R5 and amplifier U1
End connection, C5 is filter capacitor.Final amplified signal IR_OUT, which is supplied to Chip Microcomputer A/D C and acquires and handle, is calculated tested mesh
Temperature value is marked, what this measured target referred to is exactly electric energy meter terminal seat.
It is previously mentioned, Chip Microcomputer A/D C has collected two voltage signals, and one is believed for environment temperature A MB-TEMP voltage
Number, another is measured target temperature IR_OUT voltage signal.It, can be in sensor specifications for AMB-TEMP voltage signal
R-T table find environment temperature Ta.It, can be in the V-T in sensor specifications for measured target temperature IR_OUT voltage signal
Voltage value equal or similar with IR_OUT is found in Ta column in table, corresponding abscissa is then testee temperature
Tobj。
Finally introduce temperature calibration and calibration method.
Accurate temperature-measuring results are obtained, are demarcated.Due to the response voltage of sensor, the resistance value of NTC, matching
The resistance value of divider resistance R3 has deviation, can not obtain accurate temperature-measuring results according to the temp measuring system that above method is completed,
The purpose of calibration is to eliminate the deviation that sensor and circuit introduce, to achieve the effect that accurate thermometric.
The method of calibration is as follows:
2,4 foot resistance values are read after electric constant-temp preheating on sensor, by it compared with 100K Ω, correction factor a is generated, passes through
The deviation of thermistor is eliminated in the calibration of thermistor.It is measured with 37 DEG C of sensor alignment of black matrix target, reads 1,3 feet
Voltage generates correction factor b by it compared with 37 DEG C of voltage values in V-T table, eliminates infrared biography by the calibration of infrared sensor
The deviation of sensor.
The resistance and response voltage of sensor measurement are tabled look-up and are measured by R-T table and V-T table after amendment.Figure
2 indicate to be intended to for R-T table and V-T.
Temperature computation formula:
Tobj=(V/ (s*5e-10* (1+2e-3*Tamb)+(Tamb+273.15) ^4) ^0.25-273.15；
Wherein Tobj is infrared survey result temperature, and V is sensor voltage, and s is calibration factor；Tamb is environment calibration system
Number calculation formula is as follows:
S=(V (Tobj=37)/((37+273.15) ^4- (Tamb+273.15) ^4))/(5e-10* (1+2e-3*Tamb)
According to functional requirement, in terminal base 30-150 degree temperature range, the design of temperature sensing circuit will meet mistake
Difference is less than ± 5 degree of required precision.
It after the completion of circuit design, is connected in electric energy meter, terminal base and thermoelectric pile temperature measurement module such as Fig. 4 sense thermoelectric pile
It is powered on after device alignment electric energy meter terminal seat, preheating is tested after ten minutes, is tested under terminal base different temperatures, is led to
It crosses single-chip microcontroller and reads temperature value, while carrying out temperature comparison using recording instrument without paper.After tested, test data meets function and wants
It asks, data such as Fig. 3.
The temperature measuring device can be at each terminal base in electric energy meter, and electric energy meter can be according to each terminal
Measured temperature records following event, comprising: terminal overheat protector, terminal temperature are uneven, terminal temperature rise is transfinited.
The terminal overheat protector event can be by setting alarm temperature 1 and alarm temperature 2, when a certain terminal of electric energy meter
Temperature issues the user with early warning when reaching alarm temperature 1, and customer charge is directly cut off when reaching alarm temperature 2, it is ensured that electricity consumption
Safety.
The terminal temperature imbalance event can be by the temperature value of the different terminals of monitoring, when temperature gap is big between terminal
It when limit value, records corresponding event and alarms, for excluding scene due to wiring caused terminals impedance unbalance lack of standardization.
The terminal temperature rise event of transfiniting can calculate rate of temperature change per minute by real-time monitoring terminal temperature value,
When temperature ramp-up rate reaches limit value, Ying Jilu event, and it is reported to electric system main website, it repairs in time, prevention electricity consumption event
Barrier occurs.
The application provides a kind of non-contact type temperature measurement devices for intelligent electric energy meter, the thermopile sensor used
It being encapsulated using TO-39 Can, thermopile sensor is not contacted with the terminal base of electric energy meter, so fixed link is reduced, when
Electric energy meter terminal seat is unaffected when being shaken or squeezing, and reduces security risk.It is from test data as can be seen that full
To in terminal base 30-150 degree temperature range, the design of temperature sensing circuit will meet precision of the error less than ± 5 degree and want foot
It asks.
The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, although referring to above-described embodiment pair
The present invention is described in detail, those of ordinary skill in the art still can to a specific embodiment of the invention into
Row modifies perhaps equivalent replacement and these exist without departing from any modification of spirit and scope of the invention or equivalent replacement
Apply within pending claims of the invention.
Claims (11)
1. a kind of non-contact type temperature measurement devices for intelligent electric energy meter characterized by comprising thermopile sensor,
Thermopile sensor is encapsulated using TO-39 Can；For thermo-responsive resistance chip built-in in the shell of encapsulation；Thermoelectric pile passes
Sensor is not contacted with electric energy meter terminal seat.
2. the apparatus according to claim 1, which is characterized in that the thermopile sensor is compatible with CMOS technology
Infrared thermopile sensor.
3. the apparatus according to claim 1, which is characterized in that the thermo-responsive resistance chip, for environment temperature into
Row compensation.
4. the apparatus according to claim 1, which is characterized in that the thermopile sensor does not connect with electric energy meter terminal seat
Touching insulate with terminal base for guaranteeing, meets the requirement of safe insulation.
5. the apparatus according to claim 1, which is characterized in that further include:
The temperature obtained to thermopile sensor measurement is demarcated, the mistake introduced for eliminating the superior sensor of thermoelectric pile and circuit
Difference achievees the effect that accurate thermometric.
6. the apparatus according to claim 1, which is characterized in that the measurable terminal base temperature model of temperature measuring device
It encloses for 30-150 degree.
7. the apparatus according to claim 1, which is characterized in that the temperature measuring device error is less than ± 5 degree of precision.
8. the apparatus according to claim 1, which is characterized in that the temperature measuring device can be each in electric energy meter
At terminal base, electric energy meter can record following event according to the measured temperature of each terminal, comprising: terminal overheat protector, end
Sub- temperature is uneven, terminal temperature rise is transfinited.
9. event according to claim 8, which is characterized in that the terminal overheat protector event can be alarmed by setting
Temperature 1 and alarm temperature 2, issue the user with early warning when a certain terminal temperature of electric energy meter reaches alarm temperature 1, alarm when reaching
Customer charge is directly cut off when temperature 2, it is ensured that Electrical Safety.
10. event according to claim 8, which is characterized in that the terminal temperature imbalance event can pass through monitoring
The temperature value of different terminals, when between terminal temperature gap be greater than limit value when, record corresponding event simultaneously alarm, for exclude scene by
The terminals impedance unbalance caused by wiring is lack of standardization.
11. event according to claim 8, which is characterized in that the terminal temperature rise event of transfiniting can be by supervising in real time
Terminal temperature value is surveyed, rate of temperature change per minute is calculated, when temperature ramp-up rate reaches limit value, Ying Jilu event, and report
Electric system main website is given, is repaired in time, prevention is occurred with electric fault.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111473871A (en) * | 2020-04-21 | 2020-07-31 | 南方电网科学研究院有限责任公司 | Terminal temperature monitoring system and electric energy meter |
| CN111609950A (en) * | 2020-06-22 | 2020-09-01 | 江阴长仪集团有限公司 | Device and method for checking temperature measuring function of wiring terminal of electric energy meter |
| CN112014609A (en) * | 2020-09-17 | 2020-12-01 | 南方电网科学研究院有限责任公司 | Terminal seat temperature imbalance alarm function detection method and device, terminal and medium |
| CN112230052A (en) * | 2020-08-03 | 2021-01-15 | 青岛鼎信通讯股份有限公司 | Electric energy meter metering core scheme design meeting IR46 requirement |
| CN113092855A (en) * | 2021-04-29 | 2021-07-09 | 深圳供电局有限公司 | Temperature monitoring method and device, double-core intelligent ammeter and storage medium |
| CN113390518A (en) * | 2021-06-04 | 2021-09-14 | 杭州百脉科技有限公司 | Ear thermometer with high measurement accuracy and measurement method thereof |
| CN113465754A (en) * | 2021-06-07 | 2021-10-01 | 芯海科技（深圳）股份有限公司 | Temperature monitoring system and temperature monitoring method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111473871A (en) * | 2020-04-21 | 2020-07-31 | 南方电网科学研究院有限责任公司 | Terminal temperature monitoring system and electric energy meter |
| CN111609950A (en) * | 2020-06-22 | 2020-09-01 | 江阴长仪集团有限公司 | Device and method for checking temperature measuring function of wiring terminal of electric energy meter |
| CN111609950B (en) * | 2020-06-22 | 2022-04-01 | 江阴长仪集团有限公司 | Device and method for checking temperature measuring function of wiring terminal of electric energy meter |
| CN112230052A (en) * | 2020-08-03 | 2021-01-15 | 青岛鼎信通讯股份有限公司 | Electric energy meter metering core scheme design meeting IR46 requirement |
| CN112014609A (en) * | 2020-09-17 | 2020-12-01 | 南方电网科学研究院有限责任公司 | Terminal seat temperature imbalance alarm function detection method and device, terminal and medium |
| CN112014609B (en) * | 2020-09-17 | 2021-06-25 | 南方电网科学研究院有限责任公司 | Terminal seat temperature imbalance alarm function detection method and device, terminal and medium |
| CN113092855A (en) * | 2021-04-29 | 2021-07-09 | 深圳供电局有限公司 | Temperature monitoring method and device, double-core intelligent ammeter and storage medium |
| CN113390518A (en) * | 2021-06-04 | 2021-09-14 | 杭州百脉科技有限公司 | Ear thermometer with high measurement accuracy and measurement method thereof |
| CN113465754A (en) * | 2021-06-07 | 2021-10-01 | 芯海科技（深圳）股份有限公司 | Temperature monitoring system and temperature monitoring method thereof |
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Application publication date: 20191018 |