CN203489999U - Passive temperature measuring sensor for substation primary equipment - Google Patents
Passive temperature measuring sensor for substation primary equipment Download PDFInfo
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- CN203489999U CN203489999U CN201320614984.3U CN201320614984U CN203489999U CN 203489999 U CN203489999 U CN 203489999U CN 201320614984 U CN201320614984 U CN 201320614984U CN 203489999 U CN203489999 U CN 203489999U
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Abstract
The utility model provides a passive temperature measuring sensor for substation primary equipment. The passive temperature measuring sensor comprises a radio frequency receiving circuit, a temperature sensing circuit, a digital logic circuit and a memory, wherein the radio frequency receiving circuit comprises a coupling element, a rectifier circuit, a voltage regulator circuit and a modem circuit; the temperature sensing circuit comprises a capacitor temperature measuring circuit and an analog-to-digital converter; and the digital logic circuit comprises a bidirectional signal electric connection logic controller and a codec. The radio frequency receiving circuit only responds to excitation signals with a frequency equal or close to an inherent frequency of the coupling element, and temperature of equipment to be detected is sensed by utilization of frequency selectivity of the surface acoustic wave coupling element; and according to the capacitor temperature measuring circuit, capacitance-temperature characteristics is measured according to the capacitance bridge principle, relationship between capacitance and temperature is corresponded, and signals corresponding to the temperature are output. By utilization of the passive temperature measuring technology, the passive temperature measuring sensor is strong in anti-interference capability and applicability, high in integration level, convenient in implementation and low in cost.
Description
Technical field
The utility model relates to transforming plant primary equipment temperature detection technical field, is specifically related to a kind of thermometric passive temperature survey sensor of transforming plant primary equipment that is applicable to.
Background technology
Every transforming plant primary equipment temperature monitoring point is all more than 500, if polling period manual inspection according to the rules, its amount of patrolling and examining and record data amount are very huge, and existing temperature measurement technology can not meet Daily Round Check requirement.The thermometry of transforming plant primary equipment mainly contains the warm wax disk(-sc) method of examination at present, temperature indicating records labeling acts, infrared measurement of temperature method or far infrared camera shot machine thermometric, optical fiber temperature-measurement method etc.Try the temperature of warm wax disk(-sc) method in point being monitored and surpass after the melting point of the warm sheet of examination, try warm sheet and easily melt drippage, replacement cost is high; Temperature indicating records labeling acts and has the metachroic color writing function of overtemperature, but also needs artificial regularly inspection, and workload is large; Infrared measurement of temperature method causes thermometric error because infrared equipment is affected by sunray easily, and measurement environment requires high, apparatus expensive; Optical fiber temperature-measurement method adopts distributed fiberoptic sensor to transmit signal, and optical fiber is easily curved easy to break, can not be subject to environmental pollution, otherwise impact insulation.Also have some thermometrys conventionally to adopt powered battery, security and stability is poor, the problem that can bring secondary to change.
Along with the development of new technology, a kind of passive sensor of can passive transmission data and having an ability of necessarily depositing occurs.According to pertinent literature report, passive sensor is that a kind of noncontact automatic identification technology develops and next technology.General design is arranged on by temperature sensor the position that equipment may produce temperature rise exactly, by passive sensor, is connected signal is transferred out with temperature sensor, and volume is large, uses inconvenience.Desirable solution is that temperature sensor is embedded in passive sensor, owing to making like this chip power-consumption larger, cannot be integrated in passive chip, or affected by magnetic fields larger, as thermistor, be difficult to adapt to this high-intensity magnetic field of transformer station, strongly disturbing working environment.
Utility model content
The purpose of this utility model is: overcome the deficiencies in the prior art, the transforming plant primary equipment passive temperature survey sensor that a kind of integrated level is high, volume is little, antijamming capability needs by force and not additional power source is provided, can effectively be applicable to the temperature survey of transforming plant primary equipment, significantly improve and patrol and examine efficiency, reduction maintenance cost.
The technical solution of the utility model is: transforming plant primary equipment passive temperature survey sensor of the present utility model, its design feature is: comprising: radio-frequency (RF) receiving circuit, temperature sensing circuit, DLC (digital logic circuit) and storer
Above-mentioned radio-frequency (RF) receiving circuit comprises coupling element, rectification circuit, mu balanced circuit and modulation-demodulation circuit; Coupling element is electrically connected to modulation-demodulation circuit two-way signaling; Rectification circuit is electrically connected to coupling element; Mu balanced circuit is electrically connected to rectification circuit; Temperature sensing circuit comprises electric capacity temperature measurement circuit and analog to digital converter; Analog to digital converter is electrically connected to electric capacity temperature measurement circuit signal; DLC (digital logic circuit) comprises logic controller and codec; Codec andlogic control device two-way signaling is electrically connected to; The codec of DLC (digital logic circuit) is electrically connected to the modulation-demodulation circuit two-way signaling of radio-frequency (RF) receiving circuit; Storer is electrically connected to the analog to digital converter signal of temperature sensing circuit; Storer is electrically connected to the logic controller two-way signaling of DLC (digital logic circuit);
Above-mentioned radio-frequency (RF) receiving circuit is a kind of only response pumping signal identical or approaching with coupling element natural frequency, utilize the circuit of temperature of the frequency selectivity perception equipment under test of surface acoustic wave coupling element;
Above-mentioned electric capacity temperature measurement circuit is a kind of circuit of correspondence, the output signal corresponding with temperature of capacitance-temperature characteristic being measured, the relation of electric capacity and temperature carried out again according to capacitance bridge principle.
Further scheme is: in above-mentioned storer, canned data adopts ID coding structure, comprises device id, sensor ID and the metrical information of measured transforming plant primary equipment.
The utlity model has positive effect: (1) transforming plant primary equipment passive temperature of the present utility model survey sensor, adopt passive temperature measuring technique, without power supply, remove the power supply secondaries such as battery from and change problem, can realize the permanently effective monitoring to transforming plant primary equipment temperature.(2) transforming plant primary equipment passive temperature survey sensor of the present utility model, adopts electric capacity thermometric, and electric capacity has characteristic not affected by magnetic fields, can adapt to high-intensity magnetic field interference environment condition; While electric capacity is highly sensitive to temperature, and physical dimension is little and can make as required various shapes, thereby can effectively adapt to the complex environment of transforming plant primary equipment temperature detection, and applicability is strong.(3) transforming plant primary equipment passive temperature survey sensor of the present utility model, adopts contactless temperature-measuring, equipment is not produced to damage, and integrated level is high, and it is convenient, with low cost to implement.(4) transforming plant primary equipment passive temperature survey sensor of the present utility model, can improve significantly transforming plant primary side apparatus temperature patrol inspection efficiency, reduce maintenance cost, ensures Electrical Safety.(5) transforming plant primary equipment passive temperature survey sensor of the present utility model, its radio-frequency (RF) receiving circuit only responds the pumping signal identical or approaching with coupling element natural frequency, thereby can effectively adapt to the electromagnetic field environment for use of transformer station's complexity.
Accompanying drawing explanation
Fig. 1 is circuit principle of compositionality schematic diagram of the present utility model, has also shown transforming plant primary equipment in figure;
Fig. 2 is the information coding structural representation in the storer in Fig. 1.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
(embodiment 1)
See Fig. 1, the transforming plant primary equipment passive temperature survey sensor of the present embodiment, is mainly comprised of radio-frequency (RF) receiving circuit, temperature sensing circuit, DLC (digital logic circuit) and storer.
Radio-frequency (RF) receiving circuit is mainly comprised of coupling element, rectification circuit, mu balanced circuit and modulation-demodulation circuit.Coupling element is on the one hand for obtaining magnetic energy with electromagnetic field couples, on the other hand for receiving and send the radio frequency electromagnetic signal of corresponding frequencies.Rectification circuit is for converting the alternation magnetic energy of coupling element transmission to DC voltage.Mu balanced circuit is used for the working power of output transducer after the voltage voltage stabilizing of rectification circuit output.Modulation-demodulation circuit carries out demodulation and be transferred to coupling element after the temperature signal of measurement is modulated for the radiofrequency signal that coupling element is received.Coupling element is electrically connected to modulation-demodulation circuit two-way signaling; Rectification circuit is electrically connected to coupling element; Mu balanced circuit is electrically connected to rectification circuit.Radio-frequency (RF) receiving circuit only responds the pumping signal identical or approaching with coupling element natural frequency, utilizes the temperature of the frequency selectivity perception equipment under test of surface acoustic wave coupling element.
Temperature sensing circuit, mainly comprises electric capacity temperature measurement circuit and analog to digital converter.Electric capacity temperature measurement circuit, according to capacitance bridge principle, is measured capacitance-temperature characteristic, then the relation of electric capacity and temperature is carried out to correspondence, exports the signal corresponding with temperature.The electric capacity of electric capacity temperature measurement circuit has temperature control high, and its electric capacity C raises and to have significant change with temperature, good stability, the advantage such as physical dimension is little and be not subject to that strong magnetic field circumstance affects.Analog to digital converter, for carrying out the conversion of mould/number signal by the signal of electric capacity temperature measurement circuit transmission.Analog to digital converter is electrically connected to electric capacity temperature measurement circuit signal.
DLC (digital logic circuit) is mainly comprised of logic controller and codec.Logic controller reads control for command assignment, execution and storer.Codec is used for the encoding and decoding of signal, the command information of decoding and being transmitted by modulation-demodulation circuit, and will after the temperature information coding of measurement, be transferred to the modulation that modulation-demodulation circuit carries out signal.Codec andlogic control device two-way signaling is electrically connected to.
Referring to Fig. 2, storer, for stored tag information and metrical information, for reading and subsequent treatment.Storer adopts ID coding structure, comprises device id, sensor ID and the metrical information of measured transforming plant primary equipment.
The codec of DLC (digital logic circuit) is electrically connected to the modulation-demodulation circuit two-way signaling of radio-frequency (RF) receiving circuit; Storer is electrically connected to the analog to digital converter signal of temperature sensing circuit; Storer is electrically connected to the logic controller two-way signaling of DLC (digital logic circuit).
The principle of work of the transforming plant primary equipment passive temperature survey sensor of the present embodiment is: when staff patrols and examines transforming plant primary equipment temperature, by the wireless signal of supporting handset transmissions characteristic frequency, this wireless signal passes through electromagnetic field Space Coupling in the radio-frequency (RF) receiving circuit of the transforming plant primary equipment passive temperature survey sensor of the present embodiment, radio-frequency (RF) receiving circuit is transformed into direct supply by the electromagnetic wave energy receiving by rectifying and voltage-stabilizing, to activate other circuit of the transforming plant primary equipment passive temperature survey sensor of the present embodiment, modulation-demodulation circuit is transferred to logic controller by the order demodulation such as transferring temperature detection information receiving by codec simultaneously, the logic controller of DLC (digital logic circuit) is transferred the data such as temperature information of detection from storer according to order, through codec encodes, send modulation-demodulation circuit to carry out, after signal modulation, by coupling element, through built-in aerial, the information wireless such as corresponding temperature being sent in the handheld device of patrolling and examining staff.
To sum up, the transforming plant primary equipment passive temperature survey sensor of the present embodiment, adopts passive temperature measuring technique, without power supply, removes the power supply secondaries such as battery from and changes problem, can realize the permanently effective monitoring to transforming plant primary equipment temperature; Adopt electric capacity thermometric, electric capacity has characteristic not affected by magnetic fields, can adapt to high-intensity magnetic field interference environment condition; While electric capacity is highly sensitive to temperature, and physical dimension is little and can make as required various shapes, thereby can effectively adapt to the complex environment of transforming plant primary equipment temperature detection, and applicability is strong; Adopt contactless temperature-measuring, equipment is not produced to damage, integrated level is high, and it is convenient, with low cost to implement; Can improve significantly transforming plant primary side apparatus temperature patrol inspection efficiency, reduce maintenance cost, ensure Electrical Safety.
Above embodiment is the explanation to embodiment of the present utility model; but not to restriction of the present utility model; person skilled in the relevant technique is not in the situation that departing from spirit and scope of the present utility model; can also make various conversion and variation and obtain the corresponding technical scheme being equal to, therefore all technical schemes that are equal to all should be included into scope of patent protection of the present utility model.
Claims (2)
1. a transforming plant primary equipment passive temperature survey sensor, is characterized in that: comprise radio-frequency (RF) receiving circuit, temperature sensing circuit, DLC (digital logic circuit) and storer;
Described radio-frequency (RF) receiving circuit comprises coupling element, rectification circuit, mu balanced circuit and modulation-demodulation circuit; Coupling element is electrically connected to modulation-demodulation circuit two-way signaling; Rectification circuit is electrically connected to coupling element; Mu balanced circuit is electrically connected to rectification circuit; Temperature sensing circuit comprises electric capacity temperature measurement circuit and analog to digital converter; Analog to digital converter is electrically connected to electric capacity temperature measurement circuit signal; DLC (digital logic circuit) comprises logic controller and codec; Codec andlogic control device two-way signaling is electrically connected to; The codec of DLC (digital logic circuit) is electrically connected to the modulation-demodulation circuit two-way signaling of radio-frequency (RF) receiving circuit; Storer is electrically connected to the analog to digital converter signal of temperature sensing circuit; Storer is electrically connected to the logic controller two-way signaling of DLC (digital logic circuit);
Described radio-frequency (RF) receiving circuit is a kind of only response pumping signal identical or approaching with coupling element natural frequency, utilize the circuit of temperature of the frequency selectivity perception equipment under test of surface acoustic wave coupling element;
Described electric capacity temperature measurement circuit is a kind of circuit of correspondence, the output signal corresponding with temperature of capacitance-temperature characteristic being measured, the relation of electric capacity and temperature carried out again according to capacitance bridge principle.
2. transforming plant primary equipment passive temperature survey sensor according to claim 1, it is characterized in that: in described storer, canned data adopts ID coding structure, the device id that comprises measured transforming plant primary equipment, sensor ID and metrical information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320614984.3U CN203489999U (en) | 2013-09-30 | 2013-09-30 | Passive temperature measuring sensor for substation primary equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320614984.3U CN203489999U (en) | 2013-09-30 | 2013-09-30 | Passive temperature measuring sensor for substation primary equipment |
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| Publication Number | Publication Date |
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| CN203489999U true CN203489999U (en) | 2014-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320614984.3U Expired - Lifetime CN203489999U (en) | 2013-09-30 | 2013-09-30 | Passive temperature measuring sensor for substation primary equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104515617A (en) * | 2013-09-30 | 2015-04-15 | 江苏省电力公司常州供电公司 | Passive temperature measuring sensor of substation primary equipment |
| CN104155541B (en) * | 2014-07-15 | 2017-01-18 | 中国人民解放军信息工程大学 | Electromagnetic and thermal stress complex environmental sensitivity testing system and method for microprocessor |
-
2013
- 2013-09-30 CN CN201320614984.3U patent/CN203489999U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104515617A (en) * | 2013-09-30 | 2015-04-15 | 江苏省电力公司常州供电公司 | Passive temperature measuring sensor of substation primary equipment |
| CN104155541B (en) * | 2014-07-15 | 2017-01-18 | 中国人民解放军信息工程大学 | Electromagnetic and thermal stress complex environmental sensitivity testing system and method for microprocessor |
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Granted publication date: 20140319 |