CN104483036A - Passive and wireless temperature tour-inspection device for equipment in distribution network and implementation method for passive and wireless temperature tour-inspection device - Google Patents
Passive and wireless temperature tour-inspection device for equipment in distribution network and implementation method for passive and wireless temperature tour-inspection device Download PDFInfo
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Abstract
The invention discloses a passive and wireless temperature tour-inspection device for equipment in a distribution network and an implementation method for the passive and wireless temperature tour-inspection device. The problems of high implementation difficulty, high maintenance cost, potential safety hazards and the like of a conventional temperature detection technology are solved. The passive and wireless temperature tour-inspection device for the equipment in the distribution network comprises surface acoustic wave temperature sensors, signal transceivers and a tour-inspection terminal, wherein the surface acoustic wave temperature sensors are directly mounted on the surfaces of temperature measurement points, and are used for measuring temperature in a contact temperature measurement manner, and returning sensing signals carrying temperature information; the signal transceivers are mounted on the low-voltage sides of the equipment, and are used for receiving and processing the sensing signals returned by the surface acoustic wave temperature sensors; the tour-inspection terminal is used for receiving the sensing signals processed by the signal transceivers, and finishing temperature information analysis and calculation. On the basis of such a structure, the invention further discloses the implementation method for the tour-inspection device. The device and the method are low in cost, convenient to implement, high in detection accuracy, real-time in feedback and suitable for large-scale popularization and application.
Description
Technical field
The present invention relates to a kind of power equipment temperature-detecting device, specifically, relate to a kind of distribution net equipment passive and wireless temperature patrol inspection device and its implementation.
Background technology
In electric system, various kinds of equipment cut-off contact point, owing to manufacturing, environmental pollution causes contact resistance to increase because of reasons such as, contact oxidation, electric arc impacts, and operationally often constantly generate heat, temperature constantly rises, hide some dangers for equipment safety operation, if found not in time, easily cause device damage or even combustion explosion, cause fortune to lose, therefore, the temperature detection of power equipment more and more obtains everybody accreditation and attention.
In existing temperature detection technology, mainly include: optical fiber temperature-measurement, infrared measurement of temperature and wireless temperature measurement three thermometric mode.Wherein, optical fiber temperature-measurement wiring difficulty is large and optical fiber is easy to break, easily broken, non-refractory; Infrared measurement of temperature requires measured point in visual range and surface cleaning; Wireless temperature measurement adopts battery-powered, there is certain potential safety hazard in high temperature environments, changes battery and also brings higher maintenance cost.On the other hand, the wide and dispersion of the distribution net equipment such as switch cubicle, cable substantial amounts, distribution, temperature monitoring cost is high, quantities is large to adopt the mode of real time on-line monitoring to realize.
Summary of the invention
The object of the invention is to overcome above-mentioned defect, a kind of safe, reliable, stable, practical distribution net equipment passive and wireless temperature patrol inspection device based on surface acoustic wave techniques is provided.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of distribution net equipment passive and wireless temperature patrol inspection device, comprising:
SAW Temperature Sensors, is directly installed on point for measuring temperature surface, adopts contact temperature-measuring mode measuring tempeature and returns the transducing signal carrying temperature information;
Signal transceiver, is installed on equipment low-pressure side, for receiving and processing the transducing signal that described SAW Temperature Sensors returns;
Inspection terminal, receives the transducing signal after described signal transceiver process and completes parsing and the calculating of temperature information.
Specifically, described SAW Temperature Sensors comprises piezoelectric substrate, is arranged on the sensor antenna on described piezoelectric substrate, interdigital transducer and reflecting grating.
Specifically, described inspection terminal comprise CPU, power module, memory module, man-machine interface, GPRS module, USB interface and mate with signal transceiver patrol and examine radio frequency interface.
Specifically, described signal transceiver comprises master controller, reception/emitting antenna, the controlled single-pole double-throw switch (SPDT) be connected with reception/emitting antenna, and the receiving element be connected with controlled single-pole double-throw switch (SPDT) and transmitter unit, wherein:
Described receiving element comprises and connecting successively and the low noise amplifier, the second frequency mixer, the second bandpass filter and the intermediate frequency amplifier that process transducing signal, described low noise amplifier connects described controlled single-pole double-throw switch (SPDT), the output terminal of intermediate frequency amplifier connects described master controller, and the frequency information of transducing signal is turned back to described inspection terminal by radio frequency interface by described master controller;
Described transmitter unit comprises fixing local oscillation signal generation unit and adjustable local oscillation signal generation unit, for receiving the first frequency mixer of fixing local oscillation signal and adjustable local oscillation signal, the controlled single-pole single-throw switch (SPST) be connected with the first mixer output, the first bandpass filter be connected with controlled single-pole single-throw switch (SPST) output terminal, the power amplifier be connected with the first bandpass filter output terminal, described power amplifier output connects described controlled single-pole double-throw switch (SPDT).
Further, described SAW Temperature Sensors, signal transceiver, inspection terminal all pass through Radio-Frequency Wireless Communication.
An implementation method for distribution net equipment passive and wireless temperature patrol inspection device, comprises the following steps:
(1) inspection terminal sends thermometric instruction to signal transceiver, after signal transceiver receives instruction, sends the step of temperature interrogation signal to SAW Temperature Sensors;
(2), after SAW Temperature Sensors completes temperature detection, the transducing signal carrying temperature information is returned, then by being forwarded to the step of inspection terminal after signal transceiver reception, process;
(3) inspection terminal completes parsing and the calculating of temperature information according to the temperature-frequency corresponding relation of surface acoustic wave.
The concrete steps of described step (1) are as follows:
(11) inspection terminal assigns temperature detection instruction by radio frequency interface to the master controller in signal transceiver;
(12) main controller controls fixes the high-frequency signal and low frequency signal that local oscillator and adjustable local oscillator two signal generation units produce respectively, and two signals enter controlled single-pole single-throw switch (SPST) through the first frequency mixer and produce sinusoidal signal;
In (13) first bandpass filter filtering sinusoidal signals after un-necessary frequency composition, produce pumping signal through power amplifier;
(14) pumping signal enters the second single-pole double-throw switch (SPDT) by the radiation of reception/emitting antenna.
The frequency of described pumping signal is 2.4GHz, after it is received by sensor antenna, is converted into the signal of 433MHz; After SAW Temperature Sensors measuring tempeature, the 433MHz signal containing temperature information is converted into 2.4GHz signal return to signal transceiver.
The concrete steps of described step (2) are as follows:
(21) after SAW Temperature Sensors measuring tempeature, the transducing signal containing temperature information is returned to sensor antenna, and by sensor antenna, the transducing signal carrying temperature information is returned to signal transceiver;
(22) signal transceiver is by receptions/emitting antenna reception transducing signal, through the receiving element process of signal transceiver laggard enter master controller;
(23) frequency information of transducing signal is turned back to inspection terminal by radio frequency interface by master controller.
The concrete steps of described step (22) are as follows:
(221) transducing signal that reception/emitting antenna receives amplifies through low noise amplifier;
(222) transducing signal after amplifying is through the second frequency mixer mixing;
(223) transducing signal after mixing is through the second bandpass filtering frequency conversion;
(224) transducing signal after frequency conversion amplifies through intermediate frequency amplifier, then enters master controller.
Compared with prior art, the present invention has following beneficial effect:
(1) the present invention adopts SAW Temperature Sensors, and temperature sensor and wireless transceiver adopt communication, and high and low pressure side is completely isolated, have high security; In addition, sensor bulk is little, flexibly easy for installation, not by device structure and spacial influence; Communication can be widely used in the various object temperatures measured in visual range and there is barrier; Without the need to using battery and electricity getting device, basic Maintenance free after successful installation; On the other hand, the problem that cost is high, quantities is large that on-line monitoring mode exists is avoided.
(2) in the present invention, sensor antenna adopts double frequency coupling technique, 2.4GHz radio frequency signal is adopted between sensor and signal transceiver, the feature that this frequency signal has that diffracting power is strong, transmission range is far away under good in anti-interference performance, equal transmit power condition, thus measuring distance is effectively raised under limited transducing signal power condition, be highly suitable for the inner complicated structure of power equipment and electromagnetic environment; Sensor internal adopts 433MHz radio frequency signal, and this frequency band signals is conducive to realizing sensor bulk miniaturization, and the production difficulty of sensor ID T is lower, and yield rate is high.
(3) in the present invention, inspection terminal volume is little, portable, is convenient to patrol and examine operation.Carry embedded OS simultaneously, can develop and patrol and examine the senior application function such as the basic function such as workflow management, temperature data management and apparatus overheat fault diagnosis, temperature trend prediction, comprehensive inquiry statistics, both improve and patrolled and examined work efficiency, turn improved the automatic business processing level of electric power equipment management.
Accompanying drawing explanation
Fig. 1 is principle schematic of the present invention.
Fig. 2 is the structural representation of SAW Temperature Sensors in the present invention.
Fig. 3 is the system chart of signal transceiver in the present invention.
Fig. 4 is the hardware configuration schematic diagram of inspection terminal in the present invention.
In above-mentioned accompanying drawing, the component names that Reference numeral is corresponding is as follows:
1-signal transceiver, 2-SAW Temperature Sensors, 3-inspection terminal, 4-sensor antenna, 5-interdigital transducer, 6-reflecting grating, 7-piezoelectric substrate, 8-is adjustable local oscillation signal generation unit, 9-fixes local oscillation signal generation unit, 10-first frequency mixer, the controlled single-pole single-throw switch (SPST) of 11-, 12-first bandpass filter, 13-power amplifier, the controlled single-pole double-throw switch (SPDT) of 14-, 15-reception/emitting antenna, 16-low noise amplifier, 17-second frequency mixer, 18-second bandpass filter, 19-intermediate frequency amplifier, 20-master controller, 21-radio frequency interface, 22-CPU, 23-power module, 24-memory module, 25-man-machine interface, 26-GPRS module, 27-USB interface, 28-patrols and examines radio frequency interface.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described, and embodiments of the present invention include but not limited to the following example.
Embodiment
As shown in Figure 1, present embodiments provide a kind of distribution net equipment passive and wireless temperature patrol inspection device, this inspection device comprises temperature sensor, signal transceiver and inspection terminal, an inspection terminal can coordinate multiple temperature sensor and signal transceiver, and SAW Temperature Sensors, signal transceiver, inspection terminal all pass through Radio-Frequency Wireless Communication.
Temperature sensor adopts SAW Temperature Sensors, and it is directly installed on point for measuring temperature surface, as switch cubicle isolation switch contact, cable splice etc., adopts contact temperature-measuring mode to measure each contact temperature, and returns the transducing signal carrying temperature information.By above-mentioned setting, temperature sensor and wireless transceiver adopt communication, and high and low pressure side is completely isolated, have high security; In addition, sensor bulk is little, flexibly easy for installation, not by device structure and spacial influence.
As shown in Figure 2, in the present embodiment, SAW Temperature Sensors comprises piezoelectric substrate 7, be arranged on the sensor antenna 4 on piezoelectric substrate 7, interdigital transducer 5 and reflecting grating 6, reflecting grating take sensor antenna as the both sides that axis of symmetry is symmetricly set on piezoelectric substrate, this one port resonator structure is enclosed between two reverberators by the surface acoustic wave that interdigital transducer excitation is produced, obtain higher q values, there is lower disturbing mutually and insertion loss simultaneously.The signal of 433MHz is translated into after sensor antenna Received signal strength, by the inverse piezoelectric effect of interdigital transducer at piezoelectric substrate surface activation surface acoustic wave, surface acoustic wave is propagated along piezoelectric substrate, resonance is reflected to form, the temperature correlation of this resonance frequency and piezoelectric substrate by two, left and right periodic reflective grid.Surface acoustic wave is transformed into the radio frequency signal output of response by interdigital transducer by piezoelectric effect; The wireless signal that the radio frequency signal returned is converted into 2.4GHz by sensor antenna sends.
In the present embodiment, in SAW Temperature Sensors, sensor antenna adopts double frequency coupling technique, the 2.4GHz frequency signal of Received signal strength Transceiver Transmit, be converted into 433MHz frequency signal, 433MHz radio frequency signal is adopted in surface wave temperature sensor inside, this frequency band signals is conducive to realizing sensor bulk miniaturization, and the production difficulty of sensor ID T is lower, yield rate is high; After SAW Temperature Sensors measuring tempeature, 433MHz signal containing temperature information is converted into 2.4GHz signal return to signal transceiver, 2.4GHz radio frequency signal is adopted between sensor and signal transceiver, the feature that this frequency signal has that diffracting power is strong, transmission range is far away under good in anti-interference performance, equal transmit power condition, thus measuring distance is effectively raised under limited transducing signal power condition, be highly suitable for the inner complicated structure of power equipment and electromagnetic environment.
Signal transceiver, as shown in Figure 3, in the present embodiment, signal transceiver is installed on equipment low-pressure side appropriate location, and it is for receiving and processing the transducing signal that SAW Temperature Sensors returns, and the installation site of signal transceiver is with completely isolated with on high-tension side temperature sensor, specifically, signal transceiver comprises master controller 20, reception/emitting antenna 15, the controlled single-pole double-throw switch (SPDT) 14 be connected with reception/emitting antenna 15, and the receiving element to be connected with controlled single-pole double-throw switch (SPDT) 14 and transmitter unit, wherein: receiving element comprises and connecting successively and the low noise amplifier 16 processed transducing signal, second frequency mixer 17, second bandpass filter 18 and intermediate frequency amplifier 19, low noise amplifier 16 connects controlled single-pole double-throw switch (SPDT) 14, the output terminal of intermediate frequency amplifier 19 connects master controller 20, the frequency information of transducing signal is turned back to inspection terminal by radio frequency interface 21 by master controller 20, transmitter unit comprises the first frequency mixer 10 for receiving fixing local oscillation signal and adjustable local oscillation signal, the controlled single-pole single-throw switch (SPST) 11 be connected with the first frequency mixer 10 output terminal, the first bandpass filter 12 be connected with controlled single-pole single-throw switch (SPST) 11 output terminal, the power amplifier 13 be connected with the first bandpass filter 12 output terminal, power amplifier 13 output terminal connects controlled single-pole double-throw switch (SPDT) 14.
Reception/emitting antenna is installed on appropriate location in temperature sensor thermometric distance range.Signal transceiver is on the one hand by the transducing signal of reception/emitting antenna in-plant reception temperature sensor relative weak; Distant inspection terminal is forwarded to larger emissive power by radio frequency interface after on the other hand transducing signal being amplified process.
As shown in Figure 4, in the present embodiment, inspection terminal is portable equipment, be the nucleus equipment of patrolling and examining workflow management, temperature sensor signal analytical Calculation, temperature data analysis, it is mainly used in receiving the transducing signal after signal transceiver process and the parsing and the calculating that complete temperature information.Specifically, inspection terminal comprises CPU 22, power module 23, memory module 24, man-machine interface 25, GPRS module 26, and USB interface 27 patrols and examines radio frequency interface 28.Wherein:
CPU is the core component processing all kinds of instruction and data;
Power module adopts polymer battery, and capacity is large, chargeable, is convenient to long-time outdoor study;
Man-machine interface comprises touch-screen and button, and patrol officer can carry out all kinds ofly patrolling and examining operation easily;
Patrol and examine radio frequency interface and radio communication channel between inspection terminal and signal transceiver is provided, complete Various types of data mutual;
Memory module provides the storage of inspection terminal device parameter and temperature patrol inspection data;
The patrol task of inspection terminal and background management system is downloaded and is patrolled and examined data back and both can be completed in real time by GPRS module, also can be completed by USB interface off-line.On above-mentioned hardware platform basis, inspection terminal carries embedded OS, can develop abundant application function, comprises and patrols and examines workflow management, temperature data management, the prediction of apparatus overheat fault diagnosis, temperature trend, comprehensive inquiry statistics etc.
Based on above-mentioned, a typical case patrols and examines flow process and comprises: distribution net equipment temperature patrol inspection task and relevant device archives and status information are downloaded to inspection terminal from background system by data-interface by patrol officer; After reaching the spot, patrol officer uses inspection terminal to carry out temperature data according to patrol task and automatically gathers, and temperature information is kept in inspection terminal automatically.Patrol officer both can be real-time pass data back backstage main website by wireless public network, also can complete in patrol plan after each task, upload to background management system by usb data interface by unified for temperature information.
Specific implementation step of the present invention is as follows:
(1) inspection terminal sends thermometric instruction to signal transceiver, and signal transceiver sends the step of temperature interrogation signal to SAW Temperature Sensors;
(2), after SAW Temperature Sensors completes temperature detection, the transducing signal carrying temperature information is returned, then by being forwarded to the step of inspection terminal after signal transceiver reception, process;
(3) inspection terminal completes parsing and the calculating of temperature information according to the temperature-frequency corresponding relation of surface acoustic wave.
Wherein, inspection terminal assigns temperature detection instruction by radio frequency interface to the master controller in signal transceiver; Signal transceiver receives settling signal process and send action after this instruction, specific as follows:
First, main controller controls fixes local oscillator and adjustable local oscillator two signal generation units produce high-frequency signal and low frequency signal respectively, and two signals enter controlled single-pole single-throw switch (SPST) through the first frequency mixer and produce sinusoidal signal; Secondly, in the first bandpass filter filtering sinusoidal signal after un-necessary frequency composition, produce pumping signal through power amplifier; Finally, pumping signal enters the second single-pole double-throw switch (SPDT) by the radiation of reception/emitting antenna.
The concrete mode after SAW Temperature Sensors measuring tempeature, the transducing signal with temperature information being fed back to inspection terminal is as follows:
First, after SAW Temperature Sensors measuring tempeature, the transducing signal containing temperature information is returned to sensor antenna, and by sensor antenna, the transducing signal carrying temperature information is returned to signal transceiver; Secondly, signal transceiver by receptions/emitting antenna reception transducing signal, through the receiving element process of signal transceiver laggard enter master controller; Finally, the frequency information of transducing signal is turned back to inspection terminal by radio frequency interface by master controller.
Signal transceiver is as follows to the treatment step carrying the transducing signal of temperature information received: the transducing signal that reception/emitting antenna receives amplifies through low noise amplifier; Transducing signal after amplification is through the second frequency mixer mixing; Transducing signal after mixing is through the second bandpass filtering frequency conversion; Transducing signal after frequency conversion amplifies through intermediate frequency amplifier, then enters master controller.
The frequency information of transducing signal is turned back to inspection terminal by radio frequency interface by master controller, and inspection terminal completes parsing and the calculating of temperature information according to the temperature-frequency corresponding relation of surface acoustic wave, thus completes a course of work.
According to above-described embodiment, just the present invention can be realized well.What deserves to be explained is; under prerequisite based on above-mentioned design concept; for solving same technical matters; even if some making on architecture basics disclosed in this invention are without substantial change or polishing; the essence of the technical scheme adopted is still the same with the present invention, therefore it also should in protection scope of the present invention.
Claims (9)
1. a distribution net equipment passive and wireless temperature patrol inspection device, is characterized in that, comprising:
SAW Temperature Sensors, is directly installed on point for measuring temperature surface, adopts contact temperature-measuring mode measuring tempeature and returns the transducing signal carrying temperature information;
Signal transceiver, is installed on equipment low-pressure side, for receiving and processing the transducing signal that described SAW Temperature Sensors returns;
Inspection terminal, receives the transducing signal after described signal transceiver process and completes parsing and the calculating of temperature information.
2. a kind of distribution net equipment passive and wireless temperature patrol inspection device according to claim 1, it is characterized in that, described SAW Temperature Sensors comprises piezoelectric substrate (7), is arranged on the sensor antenna (4) on described piezoelectric substrate (7), interdigital transducer (5) and reflecting grating (6).
3. a kind of distribution net equipment passive and wireless temperature patrol inspection device according to claim 2, it is characterized in that, described signal transceiver comprises master controller (20), reception/emitting antenna (15), the controlled single-pole double-throw switch (SPDT) (14) be connected with reception/emitting antenna (15), and the receiving element to be connected with controlled single-pole double-throw switch (SPDT) (14) and transmitter unit, wherein:
Described receiving element comprises and connecting successively and the low noise amplifier (16), the second frequency mixer (17), the second bandpass filter (18) and the intermediate frequency amplifier (19) that process transducing signal, described low noise amplifier (16) connects described controlled single-pole double-throw switch (SPDT) (14), the output terminal of intermediate frequency amplifier (19) connects described master controller (20), and the frequency information of transducing signal is turned back to described inspection terminal by radio frequency interface (21) by described master controller (20);
Described transmitter unit comprises fixing local oscillation signal generation unit and adjustable local oscillation signal generation unit, for receiving first frequency mixer (10) of fixing local oscillation signal and adjustable local oscillation signal, the controlled single-pole single-throw switch (SPST) (11) be connected with the first frequency mixer (10) output terminal, the first bandpass filter (12) be connected with controlled single-pole single-throw switch (SPST) (11) output terminal, the power amplifier (13) be connected with the first bandpass filter (12) output terminal, described power amplifier (13) output terminal connects described controlled single-pole double-throw switch (SPDT) (14).
4. a kind of distribution net equipment passive and wireless temperature patrol inspection device according to any one of claims 1 to 3, it is characterized in that, described SAW Temperature Sensors, signal transceiver, inspection terminal all pass through Radio-Frequency Wireless Communication.
5. the implementation method of a kind of distribution net equipment passive and wireless temperature patrol inspection device according to any one of Claims 1-4, is characterized in that, comprise the following steps:
(1) inspection terminal sends thermometric instruction to signal transceiver, after signal transceiver receives instruction, sends the step of temperature interrogation signal to SAW Temperature Sensors;
(2), after SAW Temperature Sensors completes temperature detection, the transducing signal carrying temperature information is returned, then by being forwarded to the step of inspection terminal after signal transceiver reception, process;
(3) inspection terminal completes parsing and the calculating of temperature information according to the temperature-frequency corresponding relation of surface acoustic wave.
6. the implementation method of a kind of distribution net equipment passive and wireless temperature patrol inspection device according to claim 5, it is characterized in that, the concrete steps of described step (1) are as follows:
(11) inspection terminal assigns temperature detection instruction by radio frequency interface to the master controller in signal transceiver;
(12) main controller controls fixes local oscillator and adjustable local oscillator two signal generation units produce high-frequency signal and low frequency signal respectively, and two signals enter controlled single-pole single-throw switch (SPST) through the first frequency mixer and produce sinusoidal signal;
In (13) first bandpass filter filtering sinusoidal signals after un-necessary frequency composition, produce pumping signal through power amplifier;
(14) pumping signal enters the second single-pole double-throw switch (SPDT) by the radiation of reception/emitting antenna.
7. the implementation method of a kind of distribution net equipment passive and wireless temperature patrol inspection device according to claim 6, it is characterized in that, the frequency of described pumping signal is 2.4GHz, after it is received by sensor antenna, is converted into the signal of 433MHz; After SAW Temperature Sensors measuring tempeature, the 433MHz signal containing temperature information is converted into 2.4GHz signal return to signal transceiver.
8. the implementation method of a kind of distribution net equipment passive and wireless temperature patrol inspection device according to claim 6, it is characterized in that, the concrete steps of described step (2) are as follows:
(21) after SAW Temperature Sensors measuring tempeature, the transducing signal containing temperature information is returned to sensor antenna, and by sensor antenna, the transducing signal carrying temperature information is returned to signal transceiver;
(22) signal transceiver is by receptions/emitting antenna reception transducing signal, through the receiving element process of signal transceiver laggard enter master controller;
(23) frequency information of transducing signal is turned back to inspection terminal by radio frequency interface by master controller.
9. the implementation method of a kind of distribution net equipment passive and wireless temperature patrol inspection device according to claim 8, it is characterized in that, the concrete steps of described step (22) are as follows:
(221) transducing signal that reception/emitting antenna receives amplifies through low noise amplifier;
(222) transducing signal after amplifying is through the second frequency mixer mixing;
(223) transducing signal after mixing is through the second bandpass filtering frequency conversion;
(224) transducing signal after frequency conversion amplifies through intermediate frequency amplifier, then enters master controller.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105043584A (en) * | 2015-07-10 | 2015-11-11 | 北京中讯四方科技股份有限公司 | Wireless temperature measurement system |
| CN107192473A (en) * | 2017-05-17 | 2017-09-22 | 南京航空航天大学 | Surface acoustic wave system for detecting temperature and detection method based on phased array antenna |
| CN107219474A (en) * | 2016-04-22 | 2017-09-29 | 李万 | A kind of multifunction power network patrol device |
| CN107941369A (en) * | 2017-11-24 | 2018-04-20 | 广东电网有限责任公司东莞供电局 | A kind of switchgear multiple spot based on surface acoustic wave, low crosstalk temperature measuring equipment |
| CN108051111A (en) * | 2018-01-17 | 2018-05-18 | 浙江大学昆山创新中心 | Vacuum coating intracavitary wireless and passive temperature measuring equipment and measuring method |
| CN108398196A (en) * | 2018-05-30 | 2018-08-14 | 广东电网有限责任公司 | A kind of distribution net equipment temperature online monitoring system |
| CN111971074A (en) * | 2018-04-17 | 2020-11-20 | 费得噶瑞高压灭菌器股份有限公司 | Improved system for measuring temperature in harsh atmospheric environment, receiving antenna |
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| CN107941369A (en) * | 2017-11-24 | 2018-04-20 | 广东电网有限责任公司东莞供电局 | A kind of switchgear multiple spot based on surface acoustic wave, low crosstalk temperature measuring equipment |
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| CN111971074A (en) * | 2018-04-17 | 2020-11-20 | 费得噶瑞高压灭菌器股份有限公司 | Improved system for measuring temperature in harsh atmospheric environment, receiving antenna |
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