CN203224309U - Wireless temperature measurer - Google Patents
Wireless temperature measurer Download PDFInfo
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- CN203224309U CN203224309U CN 201320270422 CN201320270422U CN203224309U CN 203224309 U CN203224309 U CN 203224309U CN 201320270422 CN201320270422 CN 201320270422 CN 201320270422 U CN201320270422 U CN 201320270422U CN 203224309 U CN203224309 U CN 203224309U
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- 238000004891 communication Methods 0.000 claims abstract description 4
- 238000009529 body temperature measurement Methods 0.000 claims description 16
- 230000003321 amplification Effects 0.000 claims description 9
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- 230000007774 longterm Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 abstract 1
- 238000004806 packaging method and process Methods 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000004936 stimulating effect Effects 0.000 description 1
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Abstract
The utility model provides a wireless temperature measurer including a temperature measuring transmitting unit and a receiving displaying unit connected with each other in a wireless manner. The temperature measuring transmitting unit includes a temperature measuring unit, a wireless transmitting module and a power source module. The temperature measuring module is connected with the wireless transmitting module. The power source module supplies power for the temperature measuring module and the wireless transmitting module. The receiving displaying module includes a microprocessor, a wireless receiving module and a displaying module. The microprocessor is connected with the wireless receiving module and the displaying module respectively. The wireless receiving module is connected with the wireless transmitting module through a wireless communication method. According to the utility model, a thermo-sensitive capacitor characteristic of an LC resonance circuit is utilized for converting resonance frequency corresponding to a certain temperature to the corresponding temperature without a need of correcting algorithm. Therefore, measured temperature values are comparatively accurate. A mutually-inducting coil is adopted for supplying power for the temperature measuring and transmitting unit, so that industrial-level maintenance-free packaging is realized and long-term maintenance-free operation can be realized.
Description
Technical field
The utility model relates to a kind of device for detecting temperature, specifically a kind of wireless thermodetector.
Background technology
In the protection circuit on power system, mainly be to use isolating switch or relay at present, when overload or short circuit occurring in the circuit, cause the tripping operation of isolating switch or relay, thereby cut off whole electric system, cause large-scale power failure; Power equipment is in operational process because under overload or the short-circuit conditions, and electric wire temperature or device temperature can sharply raise, may burning apparatus, and consequence is hardly imaginable.Therefore, circuit on power system is carried out real time temperature monitoring and have very important meaning.
Infrared thermometer is adopted in circuit thermometric work at present more, but it can not directly record the true temperature of measurand, obtain true temperature, need carry out the correction of emissivity, and emissivity is a suitable complicated parameter of shadow noon factor, and this has just increased the difficulty that measurement result is handled.And what present temperature measurement module adopted is powered battery, needs often to change battery.
The utility model content
In order to overcome the shortcoming that above-mentioned prior art exists, the purpose of this utility model is to provide a kind of and realizes not having the wireless thermodetector of correcting thermometric by the LC resonant circuit.
In order to address the above problem, the utility model is by the following technical solutions: a kind of wireless thermodetector, comprise by the interconnective thermometric transmitting element of wireless mode and reception display unit, it is characterized in that, described thermometric transmitting element comprises temperature measurement module, wireless transmitter module and power module, described temperature measurement module is connected with wireless transmitter module, and described power module is respectively temperature measurement module and wireless transmitter module power supply; Described reception display unit comprises microprocessor, wireless receiving module and display module, and described microprocessor is connected with display module with wireless receiving module respectively, and described wireless receiving module links to each other by communication with wireless transmitter module;
Described temperature measurement module comprises the temperature sensing circuit that connects successively, LC resonant circuit and operational amplification circuit, described temperature sensing circuit is arranged on the test line detection line temperature information and temperature information is sent to the LC resonant circuit, described LC resonant circuit produces respective resonant frequency and resonant frequency signal is sent to operational amplification circuit according to temperature variation, described operational amplification circuit will amplify the back resonant frequency signal and send to wireless receiving module by wireless transmitter module, described wireless receiving module sends to microprocessor with the resonant frequency signal that receives, described microprocessor calculates relevant temperature according to resonant frequency signal, and shows by display module.
Preferably, described temperature measurement module also comprises the wireless remote control trigger module that is connected with the LC resonant circuit, and described reception display unit also comprises infrared remote-control device, and described infrared remote-control device links to each other with the wireless remote control trigger module.
Preferably, described power module comprises voltage transformer (VT), and described mutual induction of voltage coil is arranged on the test line.
The beneficial effects of the utility model are: the utility model utilizes the temperature-sensitive capacitance characteristic of LC resonant circuit, and resonance frequency corresponding under a certain temperature is converted into corresponding temperature, do not have correction algorithm, so the thermometric value is more accurate; Adopt mutual inductor for the power supply of thermometric transmitting element, realized the non-maintaining encapsulation of technical grade, can long-term non-maintaining work.
Description of drawings
Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail:
Fig. 1 is an embodiment structural representation of the present utility model;
Fig. 2 is the frequency-amplitude conversion schematic diagram of resonant circuit described in the utility model.
Embodiment
As shown in Figure 1, a kind of wireless thermodetector of the present utility model, comprise by the interconnective thermometric transmitting element of wireless mode and reception display unit, it is characterized in that, described thermometric transmitting element comprises temperature measurement module, wireless transmitter module and power module, described temperature measurement module is connected with wireless transmitter module, and described power module is respectively temperature measurement module and wireless transmitter module power supply; Described reception display unit comprises microprocessor, wireless receiving module and display module, and described microprocessor is connected with display module with wireless receiving module respectively, and described wireless receiving module links to each other by communication with wireless transmitter module.
Described temperature measurement module comprises the temperature sensing circuit that connects successively, LC resonant circuit and operational amplification circuit, described temperature sensing circuit is arranged on the test line detection line temperature information and temperature information is sent to the LC resonant circuit, described LC resonant circuit produces respective resonant frequency and resonant frequency signal is sent to operational amplification circuit according to temperature variation, described operational amplification circuit will amplify the back resonant frequency signal and send to wireless receiving module by wireless transmitter module, described wireless receiving module sends to microprocessor with the resonant frequency signal that receives, described microprocessor calculates relevant temperature according to resonant frequency signal, and shows by display module.
Temperature measurement module of the present utility model adopts LC resonant circuit and operational amplifier, and during according to loop resonance, its equiva lent impedance is pure resistance, and ω 0L=1/ in the time of can obtaining resonance (ω 0C) tries to achieve resonance frequency thus:
Like this electric capacity of LC resonant circuit is made to be into temperature-sensitive electric capacity, the LC resonant circuit just can produce corresponding resonance frequency according to temperature variation, resonance frequency sends to wireless receiving module through behind the operational amplifier by transmitter module, wireless receiving module sends frequency parameter to microprocessor, as shown in Figure 2, because the centre frequency of LC series resonant network is f0, the high-frequency signal of input makes the LC network be in the off resonance state always, namely works in the zone between the BC centered by A on the tuning curve.When frequency input signal increased, the working point was moved to C by A, and corresponding output voltage is reduced to Umc by Uma; Otherwise when frequency input signal reduced, the working point was moved to B by A, and it is Umb that corresponding output voltage is increased by Uma.When input signal maximum frequency deviation △ f changes when little, line segment BC is very short, can be similar to regard straight line as, so frequency-amplitude change action that it produces is linear that the variation of output voltage oscillation amplitude change and frequency input signal is linear.According to frequency and amplitude conversion characteristics, obtain following functional expression through experiment and calculating:
Δt=f(f0,ft)；t=f(f0,ft)
Δ t: temperature difference
T: temperature
F0: resonance centre frequency
Ft: stimulating frequency
Like this, microprocessor just can calculate corresponding temperature according to resonance frequency.
Because the diverse location at circuit is provided with the thermometric transmitting element, when using the reception display unit, be not subjected to the interference of the thermometric transmitting element of other positions for the temperature that accurately records a certain position, be provided with the wireless remote control trigger module at the LC resonant circuit, at the reception display unit infrared remote-control device is set, described infrared remote-control device links to each other with the wireless remote control trigger module, begins thermometric in order to trigger the LC resonant circuit.
As of the present utility model preferred, electric supply installation adopts the mutual induction of voltage coil power taking that is arranged on the test line, and like this, the thermometric transmitting element just need not adopt powered battery, realizes the non-maintaining encapsulation of technical grade, can long-term non-maintaining work.
Below the preferred embodiment of the utility model having been created specifies, but the utility model is created and is not limited to described embodiment, those of ordinary skill in the art also can make all modification that is equal to or replacement under the prerequisite of the utility model creative spirit, the modification that these are equal to or replacement all are included in the application's claim institute restricted portion.
Claims (3)
1. wireless thermodetector, comprise by the interconnective thermometric transmitting element of wireless mode and reception display unit, it is characterized in that, described thermometric transmitting element comprises temperature measurement module, wireless transmitter module and power module, described temperature measurement module is connected with wireless transmitter module, and described power module is respectively temperature measurement module and wireless transmitter module power supply; Described reception display unit comprises microprocessor, wireless receiving module and display module, and described microprocessor is connected with display module with wireless receiving module respectively, and described wireless receiving module links to each other by communication with wireless transmitter module;
Described temperature measurement module comprises the temperature sensing circuit that connects successively, LC resonant circuit and operational amplification circuit, described temperature sensing circuit is arranged on the test line detection line temperature information and temperature information is sent to the LC resonant circuit, described LC resonant circuit produces respective resonant frequency and resonant frequency signal is sent to operational amplification circuit according to temperature variation, described operational amplification circuit will amplify the back resonant frequency signal and send to wireless receiving module by wireless transmitter module, described wireless receiving module sends to microprocessor with the resonant frequency signal that receives, described microprocessor calculates relevant temperature according to resonant frequency signal, and shows by display module.
2. wireless thermodetector according to claim 1, it is characterized in that, described temperature measurement module also comprises the wireless remote control trigger module that is connected with the LC resonant circuit, and described reception display unit also comprises infrared remote-control device, and described infrared remote-control device links to each other with the wireless remote control trigger module.
3. wireless thermodetector according to claim 1 and 2 is characterized in that, described power module comprises voltage transformer (VT), and described mutual induction of voltage coil is arranged on the test line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320270422 CN203224309U (en) | 2013-05-17 | 2013-05-17 | Wireless temperature measurer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320270422 CN203224309U (en) | 2013-05-17 | 2013-05-17 | Wireless temperature measurer |
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|---|---|
| CN203224309U true CN203224309U (en) | 2013-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320270422 Expired - Fee Related CN203224309U (en) | 2013-05-17 | 2013-05-17 | Wireless temperature measurer |
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| CN (1) | CN203224309U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604842A (en) * | 2013-11-18 | 2014-02-26 | 国家电网公司 | Device for monitoring SF6 (sulfur hexafluoride) gas density and micro-water content in high-voltage electrical equipment on line |
| CN104089720A (en) * | 2014-07-25 | 2014-10-08 | 华帝股份有限公司 | Disconnect-type temperature measuring device |
| WO2016065574A1 (en) * | 2014-10-30 | 2016-05-06 | 3M Innovative Properties Company | Capacitive temperature sensing for electrical conductor |
| CN108225579A (en) * | 2016-12-21 | 2018-06-29 | 佛山市顺德区美的电热电器制造有限公司 | Household electrical appliance, wireless temperature measurement system and its temperature checking method |
-
2013
- 2013-05-17 CN CN 201320270422 patent/CN203224309U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604842A (en) * | 2013-11-18 | 2014-02-26 | 国家电网公司 | Device for monitoring SF6 (sulfur hexafluoride) gas density and micro-water content in high-voltage electrical equipment on line |
| CN103604842B (en) * | 2013-11-18 | 2016-01-27 | 国家电网公司 | SF6 gas density, micro-water content on-Line Monitor Device in high voltage electric equipment |
| CN104089720A (en) * | 2014-07-25 | 2014-10-08 | 华帝股份有限公司 | Disconnect-type temperature measuring device |
| WO2016065574A1 (en) * | 2014-10-30 | 2016-05-06 | 3M Innovative Properties Company | Capacitive temperature sensing for electrical conductor |
| US10458860B2 (en) | 2014-10-30 | 2019-10-29 | 3M Innovative Properties Company | Capacitive temperature sensing for electrical conductor |
| CN108225579A (en) * | 2016-12-21 | 2018-06-29 | 佛山市顺德区美的电热电器制造有限公司 | Household electrical appliance, wireless temperature measurement system and its temperature checking method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131002 Termination date: 20170517 |
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| CF01 | Termination of patent right due to non-payment of annual fee |