CN111289137A - Wireless passive temperature measuring device and working method thereof - Google Patents
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- CN111289137A CN111289137A CN202010104265.1A CN202010104265A CN111289137A CN 111289137 A CN111289137 A CN 111289137A CN 202010104265 A CN202010104265 A CN 202010104265A CN 111289137 A CN111289137 A CN 111289137A
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- 238000009529 body temperature measurement Methods 0.000 claims abstract description 32
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- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 238000004861 thermometry Methods 0.000 claims 2
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- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/006—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using measurement of the effect of a material on microwaves or longer electromagnetic waves, e.g. measuring temperature via microwaves emitted by the object
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Abstract
The invention relates to a wireless passive temperature measuring device and a working method thereof, wherein the wireless passive temperature measuring device comprises a plurality of temperature measuring sensors, a band-pass filter, a central processing unit, a receiver phase-locked loop local oscillator, an intermediate frequency filter and a receiver second local oscillator, wherein the temperature measuring sensors, the band-pass filter, the receiver phase-locked loop local oscillator, the intermediate frequency filter and the receiver second local oscillator are sequentially connected, and the receiver phase-locked loop local oscillator and the receiver second local oscillator are respectively connected with the central processing unit; according to the invention, by arranging the temperature measurement sensor, the band-pass filter, the central processing unit, the receiver phase-locked loop local oscillator, the intermediate frequency filter and the receiver second local oscillator, a large number of traditional infrared, optical fiber and active wireless temperature measurement devices can be replaced, so that the temperature on-line monitoring of the electrical primary equipment and other working condition scenes needing accurate temperature measurement is realized, and a basis is provided for the maintenance and overhaul of the electrical primary equipment.
Description
Technical Field
The invention belongs to the technical field of temperature measurement, and particularly relates to a wireless passive temperature measuring device and a working method thereof.
Background
In the related art, when temperature measurement is performed on primary equipment in a substation, a method of placing a temperature testing wax sheet at a key part which is easy to generate heat is generally adopted, but when the temperature of a monitored point exceeds a melting point of the temperature testing wax sheet, the temperature testing wax sheet is easy to melt and drop. In order to prevent the hidden danger, an operator on duty needs to patrol all temperature test pieces at regular intervals, and the problem of high labor intensity of workers is caused by timely reporting of melting and applying for power failure treatment. In addition, the temperature of special key positions in some transformer substations is difficult to detect, for example, the high-voltage switch contact is in the environment of high voltage, high temperature, strong magnetic field and strong electromagnetic interference, and the problem of adaptability of the electronic measuring device under the above severe environment condition must be solved to realize the temperature measurement of the contact. In addition, have exposed high pressure in the cubical switchboard, the space seals narrowly and narrowly, can't carry out artifical inspection temperature measurement, and the demand of the above-mentioned temperature measurement of demand can not be satisfied to current temperature measurement mode.
Disclosure of Invention
In view of this, the present invention is to overcome the defects in the prior art, and provide a wireless passive temperature measurement device and a working method thereof, so as to solve the problem that the temperature of the contact cannot be measured in the interference environment in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme: a wireless passive temperature measurement device, comprising: the temperature measurement device comprises a plurality of temperature measurement sensors, a band-pass filter, a central processing unit, a receiver phase-locked loop local oscillator, an intermediate frequency filter and a receiver second local oscillator, wherein the temperature measurement sensors, the band-pass filter, the receiver phase-locked loop local oscillator, the intermediate frequency filter and the receiver second local oscillator are sequentially connected, and the receiver phase-locked loop local oscillator and the receiver second local oscillator are respectively connected with the central processing unit;
the plurality of temperature measuring sensors are used for collecting electromagnetic wave signals of temperature;
the band-pass filter is used for intercepting frequency signals of the electromagnetic wave signals in a certain frequency band;
the receiver phase-locked loop local oscillator is used for receiving the frequency signal, mixing the frequency signal and outputting a first intermediate frequency signal;
the intermediate frequency filter is used for filtering the first intermediate frequency signal;
the second local oscillator of the receiver is used for receiving the filtered first intermediate frequency signal, mixing the frequency and outputting a second intermediate frequency signal;
the central processing unit is used for controlling the receiver phase-locked loop local oscillator and the receiver second local oscillator to carry out frequency mixing on the received signals and processing the received signals according to a second intermediate frequency signal output by the receiver second local oscillator to obtain temperature data.
Further, the method also comprises the following steps: the temperature measuring device comprises an antenna selection switch, an antenna and an uplink and downlink selection switch, wherein one end of the antenna is connected with a plurality of temperature measuring sensors, and the other end of the antenna is sequentially connected with the antenna selection switch and the uplink and downlink selection switch;
the number of the antennas corresponds to the number of the temperature measuring sensors;
the antenna is used for receiving the electromagnetic wave signals collected by the temperature measuring sensor;
the antenna selection switch is used for selecting an electromagnetic wave signal sent by one of the temperature sensors and sending the electromagnetic wave signal to the uplink and downlink selection switches;
the up-down selection switch is used for receiving the electromagnetic wave signal selected by the antenna selection switch and sending the electromagnetic wave signal to the central processing unit;
the antenna selection switch and the uplink and downlink selection switches are respectively connected with the central processing unit.
Further, the method also comprises the following steps:
a power amplifier for amplifying power of the electromagnetic wave signal;
one end of the power amplifier is connected with the uplink and downlink selection switch, and the other end of the power amplifier is connected with the band-pass filter.
Further, the method also comprises the following steps:
the low-noise amplifier is used for carrying out low-noise amplification on the intercepted frequency signal;
one end of the low-noise amplifier is connected with the band-pass filter, and the other end of the low-noise amplifier is connected with the receiver phase-locked loop local oscillator.
Further, the central processing unit includes:
and a digital signal processing chip.
Further, the temperature measuring sensor includes:
the acoustic surface resonator is used for receiving an electromagnetic wave signal with a fixed frequency.
Furthermore, the number of the temperature measuring sensors is six.
The embodiment of the application provides a working method of a wireless passive temperature measuring device, which comprises the following steps:
collecting electromagnetic wave signals of a plurality of temperatures;
intercepting a frequency signal of the electromagnetic wave signal in a certain frequency band;
receiving the frequency signal, mixing the frequency signal, and outputting a first intermediate frequency signal;
filtering the first intermediate frequency signal;
receiving the filtered first intermediate frequency signal, mixing the first intermediate frequency signal and outputting a second intermediate frequency signal;
and processing according to the second intermediate frequency signal to obtain temperature data.
Further, before intercepting the frequency signal of the electromagnetic wave signal in a certain frequency band, the method further comprises:
one of the plurality of electromagnetic wave signals is selected.
By adopting the technical scheme, the invention can achieve the following beneficial effects:
through setting up temperature sensor, band-pass filter, central processing unit, receiver phase-locked loop local oscillator, intermediate frequency filter and receiver second local oscillator, can replace a large amount of traditional infrared, optic fibre and active wireless temperature measurement equipment to realize the temperature on-line monitoring of electric primary equipment, provide the basis for the maintenance and the maintenance of electric primary equipment.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a wireless passive temperature measuring device according to the present invention;
FIG. 2 is a schematic diagram illustrating steps of a method for operating a wireless passive temperature measurement device according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The following describes a specific wireless passive temperature measuring device and an operating method thereof provided in the embodiments of the present application with reference to the accompanying drawings.
As shown in fig. 1, the wireless passive temperature measuring device provided in the embodiment of the present application includes: the temperature measurement device comprises a plurality of temperature measurement sensors 1, a band-pass filter 2, a central processing unit 6, a receiver phase-locked loop local oscillator 3, an intermediate frequency filter 4 and a receiver second local oscillator 5, wherein the temperature measurement sensors 1, the band-pass filter 2, the receiver phase-locked loop local oscillator 3, the intermediate frequency filter 4 and the receiver second local oscillator 5 are sequentially connected, and the receiver phase-locked loop local oscillator 3 and the receiver second local oscillator 5 are respectively connected with the central processing unit 6;
the plurality of temperature measuring sensors 1 are used for collecting electromagnetic wave signals of temperature;
the band-pass filter 2 is used for intercepting frequency signals of the electromagnetic wave signals in a certain frequency band;
the receiver phase-locked loop local oscillator 3 is used for receiving the frequency signal, mixing the frequency signal and outputting a first intermediate frequency signal;
the intermediate frequency filter 4 is configured to filter the first intermediate frequency signal;
the second local oscillator 5 of the receiver is used for receiving the filtered first intermediate frequency signal, mixing the frequency, and outputting a second intermediate frequency signal;
the central processing unit 6 is configured to control the receiver phase-locked loop local oscillator 3 and the receiver second local oscillator 5 to mix the received signals and process the received signals according to a second intermediate frequency signal output by the receiver second local oscillator 5 to obtain temperature data.
The working principle of the wireless passive temperature measuring device is as follows: the temperature measurement sensors 1 collect electromagnetic wave signals of temperature, the band-pass filter 2 intercepts frequency signals of a certain frequency band of the electromagnetic wave signals, the central processing unit 6 controls a receiver phase-locked loop local oscillator 3 to receive the frequency signals, frequency mixing is carried out on the frequency signals, then a first intermediate frequency signal is output, and the first intermediate frequency signal is filtered through the intermediate frequency filter 4; the central processing unit 6 controls a second local oscillator 5 of the receiver to receive the filtered first intermediate frequency signal, mixes the frequency of the first intermediate frequency signal and outputs a second intermediate frequency signal; the central processing unit 6 analyzes and processes the second intermediate frequency signal to obtain temperature data.
This application is through setting up temperature sensor 1, band pass filter 2, central processing unit 6, receiver phase-locked loop local oscillator 3, intermediate frequency filter 4 and receiver second local oscillator 5, can replace a large amount of traditional infrared, optic fibre and active wireless temperature measurement equipment to realize the temperature on-line monitoring of electric primary equipment, provide the basis for the maintenance and the maintenance of electric primary equipment.
In some embodiments, referring to fig. 1, the wireless passive temperature measuring device provided by the present application further includes: the temperature measuring device comprises an antenna selection switch 8, an antenna 7 and an uplink and downlink selection switch 9, wherein one end of the antenna 7 is connected with a plurality of temperature measuring sensors 1, and the other end of the antenna 7 is sequentially connected with the antenna selection switch 8 and the uplink and downlink selection switch 9;
the number of the antennas 7 corresponds to the number of the temperature measuring sensors 1;
the antenna 7 is used for receiving electromagnetic wave signals collected by the temperature measuring sensor 1;
the antenna selection switch 8 is used for selecting an electromagnetic wave signal sent by one temperature sensor 1 of the plurality of temperature sensors 1 and sending the electromagnetic wave signal to the uplink and downlink selection switch 9;
the uplink and downlink selection switch 9 is used for receiving the electromagnetic wave signal selected by the antenna selection switch 8 and sending the electromagnetic wave signal to the central processing unit 6;
the antenna selection switch 8 and the uplink and downlink selection switch 9 are respectively connected with the central processing unit 6.
Preferably, the method further comprises the following steps:
a power amplifier 10 for amplifying power of an electromagnetic wave signal;
one end of the power amplifier 10 is connected with the uplink and downlink selection switch 9, and the other end is connected with the band-pass filter 2.
Preferably, the method further comprises the following steps:
the low-noise amplifier 11 is used for performing low-noise amplification on the intercepted frequency signal;
one end of the low-noise amplifier 11 is connected with the band-pass filter 2, and the other end of the low-noise amplifier is connected with the receiver phase-locked loop local oscillator 3.
Specifically, the electromagnetic wave signals of the temperature collected by the plurality of temperature sensors 1 are transmitted to the corresponding antennas 7, the central processing unit 6 controls the antenna selection switch 8 to select a signal source in the plurality of electromagnetic wave signals to be transmitted to the later stage for processing, the electromagnetic wave signals pass through the uplink and downlink selection switch 9 and reach the power amplifier 10 for signal power amplification, then the band-pass filter 2 intercepts frequency signals of a certain frequency band, the band-pass frequency signals are subjected to low-noise amplification through the low-noise amplifier 11, the amplified band-pass frequency signals are mixed with the receiver phase-locked loop 3 frequency signals sent by the DSP central processing unit 6 to obtain intermediate frequency signals, the intermediate frequency signals are filtered by the intermediate frequency filter 4 and then mixed with the receiver second local oscillator 5(10Mhz) frequency signals, and the intermediate frequency signals are output to the DSP central processing system for analysis and operation, and calculating the corresponding ambient temperature according to the frequency signal to achieve the purpose of measuring the ambient temperature.
Preferably, the central processing unit 6 in the present application is a digital signal processing chip, and it should be noted that the central processing unit 6 in the present application may also be other existing chips or chips that may appear in the future that can achieve the purpose of the present application.
Preferably, the temperature sensor 1 in the present application includes:
a sound meter resonator (not shown in the figure) for receiving an electromagnetic wave signal of a fixed frequency.
Specifically, in the temperature sensor 1 of the present application, a sound meter resonator is provided, when an electromagnetic wave with a fixed frequency is input to the sound meter resonator, the frequency of an electromagnetic wave signal output by the sound meter resonator changes along with the change of the ambient temperature sensed by the sound meter resonator, and by using this characteristic, the ambient temperature corresponding to the sound meter resonator can be converted by collecting the output frequency of the sound meter resonator, so as to achieve the purpose of measuring the ambient temperature.
In the present application, the number of the plurality of temperature measurement sensors 1 is six. Correspondingly, when the number of the temperature measuring sensors 1 is six, the six temperature measuring sensors correspond to six antennas, and it should be noted that the antenna selection switch 8 is one in both the uplink selection switch 9 and the downlink selection switch 9.
The embodiment of the application provides a working method of a wireless passive temperature measuring device, as shown in fig. 2, including:
s101, collecting electromagnetic wave signals of a plurality of temperatures;
s102, intercepting a frequency signal of the electromagnetic wave signal in a certain frequency band;
s103, receiving the frequency signal, mixing the frequency signal, and outputting a first intermediate frequency signal;
s104, filtering the first intermediate frequency signal;
s105, receiving the filtered first intermediate frequency signal, mixing the first intermediate frequency signal and outputting a second intermediate frequency signal;
and S106, processing according to the second intermediate frequency signal to obtain temperature data.
Preferably, before intercepting the frequency signal of a certain frequency band of the electromagnetic wave signal, the method further includes:
s107, one electromagnetic wave signal in the plurality of electromagnetic wave signals is selected.
The working principle of the working method of the wireless passive temperature measuring device is that electromagnetic wave signals of multiple temperatures are collected; selecting one electromagnetic wave signal from a plurality of electromagnetic wave signals, and intercepting a frequency signal of the electromagnetic wave signal in a certain frequency band; receiving the frequency signal, mixing the frequency signal, and outputting a first intermediate frequency signal; filtering the first intermediate frequency signal; receiving the filtered first intermediate frequency signal, mixing the first intermediate frequency signal and outputting a second intermediate frequency signal; and processing according to the second intermediate frequency signal to obtain temperature data.
In summary, the present invention provides a wireless passive temperature measurement device capable of measuring temperature of a contact in an interference environment and a working method thereof, including a plurality of temperature measurement sensors, a band pass filter, a central processing unit, a receiver phase-locked loop local oscillator, an intermediate frequency filter, and a receiver second local oscillator, wherein the plurality of temperature measurement sensors, the band pass filter, the receiver phase-locked loop local oscillator, the intermediate frequency filter, and the receiver second local oscillator are sequentially connected, and the receiver phase-locked loop local oscillator and the receiver second local oscillator are respectively connected to the central processing unit; according to the invention, by arranging the temperature sensor, the band-pass filter, the central processing unit, the receiver phase-locked loop local oscillator, the intermediate frequency filter and the receiver second local oscillator, a large number of traditional infrared, optical fiber and active wireless temperature measurement devices can be replaced, so that the temperature of the electrical primary device can be monitored on line, and a basis is provided for maintenance and overhaul of the electrical primary device.
It is to be understood that the apparatus embodiments provided above correspond to the method embodiments described above, and corresponding specific contents may be referred to each other, which are not described herein again.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A wireless passive temperature measuring device, comprising: the temperature measurement device comprises a plurality of temperature measurement sensors, a band-pass filter, a central processing unit, a receiver phase-locked loop local oscillator, an intermediate frequency filter and a receiver second local oscillator, wherein the temperature measurement sensors, the band-pass filter, the receiver phase-locked loop local oscillator, the intermediate frequency filter and the receiver second local oscillator are sequentially connected, and the receiver phase-locked loop local oscillator and the receiver second local oscillator are respectively connected with the central processing unit;
the plurality of temperature measuring sensors are used for collecting electromagnetic wave signals of temperature;
the band-pass filter is used for intercepting frequency signals of the electromagnetic wave signals in a certain frequency band;
the receiver phase-locked loop local oscillator is used for receiving the frequency signal, mixing the frequency signal and outputting a first intermediate frequency signal;
the intermediate frequency filter is used for filtering the first intermediate frequency signal;
the second local oscillator of the receiver is used for receiving the filtered first intermediate frequency signal, mixing the frequency and outputting a second intermediate frequency signal;
the central processing unit is used for controlling the receiver phase-locked loop local oscillator and the receiver second local oscillator to carry out frequency mixing on the received signals and processing the received signals according to a second intermediate frequency signal output by the receiver second local oscillator to obtain temperature data.
2. The wireless passive temperature measurement device of claim 1, further comprising: the temperature measuring device comprises an antenna selection switch, an antenna and an uplink and downlink selection switch, wherein one end of the antenna is connected with a plurality of temperature measuring sensors, and the other end of the antenna is sequentially connected with the antenna selection switch and the uplink and downlink selection switch;
the number of the antennas corresponds to the number of the temperature measuring sensors;
the antenna is used for receiving the electromagnetic wave signals collected by the temperature measuring sensor;
the antenna selection switch is used for selecting an electromagnetic wave signal sent by one of the temperature sensors and sending the electromagnetic wave signal to the uplink and downlink selection switches;
the up-down selection switch is used for receiving the electromagnetic wave signal selected by the antenna selection switch and sending the electromagnetic wave signal to the central processing unit;
the antenna selection switch and the uplink and downlink selection switches are respectively connected with the central processing unit.
3. The wireless passive temperature measurement device of claim 2, further comprising:
a power amplifier for amplifying power of the electromagnetic wave signal;
one end of the power amplifier is connected with the uplink and downlink selection switch, and the other end of the power amplifier is connected with the band-pass filter.
4. The wireless passive temperature measurement device of claim 3, further comprising:
the low-noise amplifier is used for carrying out low-noise amplification on the intercepted frequency signal;
one end of the low-noise amplifier is connected with the band-pass filter, and the other end of the low-noise amplifier is connected with the receiver phase-locked loop local oscillator.
5. The wireless passive thermometric apparatus of claim 1, wherein the central processor comprises:
and a digital signal processing chip.
6. The wireless passive thermometry device of claim 1, wherein the thermometry sensor comprises:
the acoustic surface resonator is used for receiving an electromagnetic wave signal with a fixed frequency.
7. The wireless passive thermometric apparatus of any one of claims 1-6, wherein the number of thermometric sensors is six.
8. A working method of a wireless passive temperature measuring device is characterized by comprising the following steps:
collecting electromagnetic wave signals of a plurality of temperatures;
intercepting a frequency signal of the electromagnetic wave signal in a certain frequency band;
receiving the frequency signal, mixing the frequency signal, and outputting a first intermediate frequency signal;
filtering the first intermediate frequency signal;
receiving the filtered first intermediate frequency signal, mixing the first intermediate frequency signal and outputting a second intermediate frequency signal;
and processing according to the second intermediate frequency signal to obtain temperature data.
9. The method according to claim 8, further comprising, before intercepting the frequency signal of a certain frequency band of the electromagnetic wave signal:
one of the plurality of electromagnetic wave signals is selected.
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| CN202010104265.1A CN111289137A (en) | 2020-02-14 | 2020-02-14 | Wireless passive temperature measuring device and working method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103279777A (en) * | 2013-05-06 | 2013-09-04 | 西南交通大学 | Wireless surface acoustic wave temperature measurement system reader-writer |
| CN105092081A (en) * | 2015-08-14 | 2015-11-25 | 深圳华远微电科技有限公司 | Anti-interference temperature signal receiver and signal processing method |
| CN205317367U (en) * | 2015-10-23 | 2016-06-15 | 珠海黑石电气自动化科技有限公司 | Passive wireless temperature sensor based on saw |
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2020
- 2020-02-14 CN CN202010104265.1A patent/CN111289137A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103279777A (en) * | 2013-05-06 | 2013-09-04 | 西南交通大学 | Wireless surface acoustic wave temperature measurement system reader-writer |
| CN105092081A (en) * | 2015-08-14 | 2015-11-25 | 深圳华远微电科技有限公司 | Anti-interference temperature signal receiver and signal processing method |
| CN205317367U (en) * | 2015-10-23 | 2016-06-15 | 珠海黑石电气自动化科技有限公司 | Passive wireless temperature sensor based on saw |
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