CN109459151A - A kind of low temperature background is plunged into the commercial sea amount temperature point on-Line Monitor Device and method - Google Patents
A kind of low temperature background is plunged into the commercial sea amount temperature point on-Line Monitor Device and method Download PDFInfo
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- CN109459151A CN109459151A CN201811486661.4A CN201811486661A CN109459151A CN 109459151 A CN109459151 A CN 109459151A CN 201811486661 A CN201811486661 A CN 201811486661A CN 109459151 A CN109459151 A CN 109459151A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims abstract description 43
- 230000003750 conditioning effect Effects 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 25
- 239000002689 soil Substances 0.000 claims abstract description 18
- 230000008054 signal transmission Effects 0.000 claims abstract description 10
- 230000010355 oscillation Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 5
- 238000001228 spectrum Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 238000007600 charging Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000012913 prioritisation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/026—Means for indicating or recording specially adapted for thermometers arrangements for monitoring a plurality of temperatures, e.g. by multiplexing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
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- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
It plunges into the commercial sea amount temperature point on-Line Monitor Device and method the invention discloses a kind of low temperature environment, on-Line Monitor Device includes temperature collecting module, signal transmission module, signal conditioning module, main control unit and power supply module；Temperature collecting module includes temperature sensor of several scattering devices in soil to be detected；Signal transmission module includes modulation circuit, carrier-frequency circuit and the demodulator circuit being sequentially connected；Signal conditioning module includes analog switch module, conditioning circuit and modulus conversion chip；Main control unit includes microcontroller, memory module, GPRS remote transmission module and USB module.When work, temperature collecting module acquisition signal is simultaneously transmitted, main control unit controls analog switch module and converts serial signal for the temperature signal of parallel each temperature sensor according to predetermined temperature sorting sensor, digital information after modulus conversion chip is converted is stored to memory module, and is controlled GPRS remote transmission module and sent it to host computer.
Description
Technical field
The present invention relates to thermosensitive resistance measurement technical field under low temperature environment, especially a kind of low temperature environment is plunged into the commercial sea amount temperature
Point on-Line Monitor Device and method.
Background technique
Temperature monitoring is the important technology field that current many requirement of engineering are related to and the Xian Xing Ministry of Railways in road construction
With the important construction quotas of development, especially developing the Northwest with greater need for construction road, but the Northwest such as highlands
There are larger difference in soil property environment and plains region, and colder regional aqueous soil mutability is at frozen soil region, due to the stream of frozen soil
Denaturation, construction project road easily causes frost heave and thaw collapse above herein, it is therefore desirable to a large amount of temperature sensing is placed under soil
Device measurement temperature judges soil property situation, so as to engineering construction.When measurement points are more, such as reach several hundred a points or thousands of
When point, the complexity of measuring circuit is reduced, improving Measurement reliability is the target that current scientific worker pursues always.
Traditional multichannel temperature point measurement is based primarily upon microcontroller, if measurement temperature spot is digital signal, directly connects
The input/output port for connecing microcontroller carries out data processing, if analog signal, first converts digital signal for each point, then with it is micro-
Controller is connected, and the quantity for being limited in that observable temperature point of this method and the general input/output port of microcontroller have
It closes, is only applicable to the points measurement of passage aisle quantity；Traditional a large amount of temperature spot telemeasurements, a temperature spot output are believed all the way
Number, therefore several hundred or thousands of signal wire output signals are needed if several hundred or thousands of a measurement points, increase the body of equipment
Product, integrated level reduce and improve the degree of difficulty of plant maintenance.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of low temperature ring for defect involved in background technique
Border is plunged into the commercial sea amount temperature point on-Line Monitor Device and method.
The present invention uses following technical scheme to solve above-mentioned technical problem:
A kind of low temperature environment is plunged into the commercial sea amount temperature point on-Line Monitor Device, includes temperature collecting module, signal transmission module, letter
Number conditioning module, main control unit and power supply module.
The temperature collecting module includes temperature sensor of several scattering devices in soil to be detected；The temperature passes
Sensor is used to incude the temperature of its location soil, and passes it to the signal transmission module.
The signal transmission module includes modulation circuit, carrier-frequency circuit and the demodulator circuit being sequentially connected；
The modulation circuit is connected with each temperature sensor respectively, for by the temperature signal one of each temperature sensor
In the one corresponding each preset carrier frequency being adjusted on information transmission broadband, it is integrated into transmission signal, and will integration
At transmission signal pass to the carrier-frequency circuit；
The carrier-frequency circuit is used to the transmission signal being integrated into being sent to demodulator circuit by modulation circuit；
The demodulator circuit be used for will be integrated into transmission signal be demodulated to each temperature sensor temperature signal and by its
The signal conditioning module is passed to parallel.
The signal conditioning module includes analog switch module, conditioning circuit and modulus conversion chip；
The input terminal of the analog switch module is connected with the demodulator circuit, and output end passes through the conditioning circuit and institute
The input terminal for stating modulus conversion chip is connected, and control terminal is connected with the main control unit；Analog switch module is used for according to master control
The instruction of unit converts the temperature signal of parallel each temperature sensor to according to predetermined temperature sorting sensor
Serial signal, and pass it to the conditioning circuit；
The serial signal conditioning that the conditioning circuit is used to input is in the modulus conversion chip analog-to-digital conversion range
After interior analog signal, the modulus conversion chip is passed it to；
The modulus conversion chip is used to convert the analog signal that conditioning circuit exports to corresponding digital information, and will
It passes to the main control unit；
The main control unit includes microcontroller, memory module, GPRS remote transmission module and USB module；
The microcontroller respectively with memory module, GPRS remote transmission module, USB module, analog switch modular electrical
It is connected, for controlling analog switch module according to predetermined temperature sorting sensor for parallel each temperature sensor
Temperature signal is converted into serial signal, and the digital information after modulus conversion chip is converted is stored to memory module, and is controlled
GPRS remote transmission module modulus conversion chip is converted after the i.e. each temperature sensor of digital information temperature information send
To host computer；
Temperature information of the USB module for each temperature sensor in manual download storage module.
It plunges into the commercial sea the further prioritization scheme of amount temperature point on-Line Monitor Device as a kind of low temperature environment of the present invention, the temperature
It spends sensor and uses thermistor.
It plunges into the commercial sea the further prioritization scheme of amount temperature point on-Line Monitor Device as a kind of low temperature environment of the present invention, the confession
Electric module uses solar panels.
It plunges into the commercial sea the single line transmission method of amount temperature point on-Line Monitor Device the invention also discloses one kind low temperature environment, packet
Containing following steps:
Step 1), enabling the quantity of temperature sensor is n, and transmission channel bandwidth B, preset transmission signal occupies total
Frequency band is FAlways, the empty band bandwidth between the temperature signal of preset adjacent temperature sensor is fIt is empty, B > FAlways；
Bandwidth F shared by the temperature signal of each temperature sensor is calculated according to the following formulaMark:
Step 2), according to bandwidth F shared by the temperature signal of each temperature sensorMark, adjacent temperature sensor temperature
Empty band bandwidth f between signalIt is empty, occur carrier wave oscillator initial oscillation frequency F0It is corresponding to calculate each temperature sensor
Carrier frequency:
fcm=F0+(FMark+fIt is empty)(n-m)
In formula, fcmFor the carrier frequency of m-th of temperature sensor temperature information；
Step 3) is carried out according to temperature information of the corresponding carrier frequency of each temperature sensor to each temperature sensor
Modulation, is integrated into transmission signal；
The transmission signal being integrated into is passed to carrier-frequency circuit, the biography that carrier-frequency circuit will be integrated by step 4), modulation circuit
Defeated signal is sent to demodulator circuit by modulation circuit.
The invention adopts the above technical scheme compared with prior art, has following technical effect that
When the transmission bandwidth of signal wire is larger, a transmission signal line reality can be only used by designing different carrier-frequency circuits
The monitoring of existing multiple temperature points, reduces the complexity of monitoring device, the integrated level of enhancement device, greatly reduce device at
This；Solar energy and the double charging modules of battery, can automatically provide power supply in the state that guarantee is unattended；A large amount of points monitorings
So that data are more comprehensively and reliable；Device has separately set USB interface other than remote transmission function, avoids remote transmission bring
Loss of data improves the reliability of device；Host computer procedure calculates the degree of variation of various discrete temperature spot, identifies more wave zones
Domain band shows frozen soil region, will extract data and analysis data combine, so that device is more intelligent.
Detailed description of the invention
Fig. 1 shows that a kind of low temperature background of the invention is plunged into the commercial sea the general frame of amount temperature point on-Line Monitor Device；
Fig. 2 shows a kind of temperature spot schematic layout pattern of the invention；
Fig. 3 shows the road a kind of single line Zhong Ge signal spectrum schematic diagram of the invention.
Specific embodiment
Technical solution of the present invention is described in further detail with reference to the accompanying drawing:
As shown in Figure 1, plunging into the commercial sea amount temperature point on-Line Monitor Device the invention discloses a kind of low temperature environment, adopted comprising temperature
Collect module, signal transmission module, signal conditioning module, main control unit and power supply module.
Temperature collecting module: comprising temperature sensor of several scattering devices in soil to be detected, temperature sensor is adopted
With two-wire system thermistor temperature sensor, both ends are shared, one end connects AD7793 (the analog-to-digital conversion core in signal conditioning module
Piece) output drive electric current source, the other end as temperature collection voltage signal export, the modulation of connection signal transmission module
Device.Temperature acquisition schematic layout pattern is as shown in Figure 2.
Signal transmission module: including modulation circuit, carrier-frequency circuit and demodulator circuit.It is biggish in the bandwidth of a signal wire
Under the premise of, change the frequency of each signal, carried out frequency spectrum shift, makes it possible to transmit on a signal wire, in addition to
Interfering with each other for each signal is avoided, then has certain frequency band between signal and signal in vain and does not use, reaches a signal wire and passes
The purpose of defeated a plurality of signal.Signal first passes through low-pass filter, limits highest frequency, then by modulator and carrier multiplication, no
With signal it needs to be determined that different carrier wave, carrier wave fcDetermine that method is as follows: the oscillator initial oscillation frequency that carrier wave occurs is
F0, the empty band bandwidth between the temperature signal of adjacent temperature sensor is fIt is empty, share n channel, i.e. n single-side belt (top
Band or lower sideband, are multiplied to obtain by transmission signal with carrier-frequency circuit), it is F that transmission signal, which occupies total frequency band,Always(the signal of selection
The bandwidth of line is B, B > FAlways), the standard bandwidth of the road Ze Mei signal are as follows:
The road-load wave frequency rate of m are as follows:
fcm=F0+(FMark+fIt is empty)(n-m)
Determine the frequency spectrum shift that signal is carried out after each carrier signal, frequency spectrum f of the road the m signal in single-signal-line1~fmSignal
Figure is as shown in Figure 3.
Signal conditioning module: including analog switch module, conditioning circuit and modulus conversion chip.The signal demodulated passes through
Analog switch module, analog switch selection can be by the biggish signal of electric signal range, if the original signal demodulated is not in mould
In the range of quasi- switch can be by signal, operational amplifier need to be added after demodulator, signal is controlled can lead in analog switch
In the range of crossing.When number of signals is more, analog switch is connected with decoder, and the output pin of decoder connects each simulation
The enable end of switch, the control terminal of decoder and the address end of analog switch and the signal input/output port of main control unit are connected
It connects, the input terminal by controlling decoder selects the analog switch of work, controls the address end selection output selection of analog switch
Signal all the way can increase the quantity of decoder and the quantity of analog switch therewith with the increase of number of signals.Signal from
After analog switch module is sequentially output, by conditioning circuit, conditioning circuit is mainly made of operational amplifier, adjusts operation amplifier
The resistance value of device changes the range of signal of output, guarantees signal in the conversion voltage range of digital analog converter (ADC).The dress
The digital analog converter using 24 AD7793 models is set, converts voltage as 0~5V, built-in excitation current source can be temperature-sensitive electricity
Resistance provides current source, output voltage signal.
Main control unit: including microcontroller, memory module, GPRS remote transmission module and USB module；Microcontroller difference
It is connected with memory module, GPRS remote transmission module, USB module, analog switch modular electrical, for controlling analog switch module
Serial signal is converted by the temperature signal of parallel each temperature sensor according to predetermined temperature sorting sensor, it will
Digital information after modulus conversion chip conversion is stored to memory module, and controls GPRS remote transmission module for analog-to-digital conversion core
Digital information, that is, each temperature sensor temperature information after piece conversion is sent to host computer；USB module for downloading manually
The temperature information of each temperature sensor in memory module.
Solar powered module: directlying adopt existing solar panels collecting energy on the market, and power supply uses 1 piece of 6V, 2W
Solar panel directly pass through the 4055 lithium battery chargings being together in parallel to two pieces, open output switch, lithium battery passes through
The booster circuit of MC34063CD composition is raised to 5V, exports 5V voltage.
Host computer is discrete data with 1 year data value of a sensor, by calculating the variance yields of an annual data,
The fluctuating range of data is acquired, frozen soil region is analyzed with this.M sensor measures 1 year temperature data value and is denoted as T1,
T2..., Tm-1, Tm, mean value am(t), then t is denoted as D for departure degree, that is, variance of mean value to random temperature point at various moments
[Tm(t)],
D[Tm(t)]=E { [Tm(t)-am(t)]2}
The variance yields for surveying 1 year temperature spot of each sensor to device carries out bubbling operation, and it is biggish to select variance yields
Point calculates it corresponding temperature according to the characteristic of the various frozen soil such as temperature changes such as permafrost soil, frost zone and short-term frozen soil
Degree fluctuation threshold obtains the soil property type in temperature measurement device point region by threshold value compared with variance yields.
It plunges into the commercial sea the single line transmission method of amount temperature point on-Line Monitor Device the invention also discloses one kind low temperature environment, packet
Containing following steps:
Step 1), enabling the quantity of temperature sensor is n, and transmission channel bandwidth B, preset transmission signal occupies total
Frequency band is FAlways, the empty band bandwidth between the temperature signal of preset adjacent temperature sensor is fIt is empty, B > FAlways；
Bandwidth F shared by the temperature signal of each temperature sensor is calculated according to the following formulaMark:
Step 2), according to bandwidth F shared by the temperature signal of each temperature sensorMark, adjacent temperature sensor temperature
Empty band bandwidth f between signalIt is empty, occur carrier wave oscillator initial oscillation frequency F0It is corresponding to calculate each temperature sensor
Carrier frequency:
fcm=F0+(FMark+fIt is empty)(n-m)
In formula, fcmFor the carrier frequency of m-th of temperature sensor temperature information；
Step 3) is carried out according to temperature information of the corresponding carrier frequency of each temperature sensor to each temperature sensor
Modulation, is integrated into transmission signal；
The transmission signal being integrated into is passed to carrier-frequency circuit, the biography that carrier-frequency circuit will be integrated by step 4), modulation circuit
Defeated signal is sent to demodulator circuit by modulation circuit.
Those skilled in the art can understand that unless otherwise defined, all terms used herein (including skill
Art term and scientific term) there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Also
It should be understood that those terms such as defined in the general dictionary should be understood that have in the context of the prior art
The consistent meaning of meaning will not be explained in an idealized or overly formal meaning and unless defined as here.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not limited to this hair the foregoing is merely a specific embodiment of the invention
Bright, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection scope within.
Claims (4)
- The amount temperature point on-Line Monitor Device 1. a kind of low temperature environment is plunged into the commercial sea, which is characterized in that passed comprising temperature collecting module, signal Defeated module, signal conditioning module, main control unit and power supply module；The temperature collecting module includes temperature sensor of several scattering devices in soil to be detected；The temperature sensor For incuding the temperature of its location soil, and pass it to the signal transmission module；The signal transmission module includes modulation circuit, carrier-frequency circuit and the demodulator circuit being sequentially connected；The modulation circuit is connected with each temperature sensor respectively, for the temperature signal one of each temperature sensor is a pair of In each preset carrier frequency that should be adjusted on information transmission broadband, it is integrated into transmission signal, and will be integrated into Transmission signal passes to the carrier-frequency circuit；The carrier-frequency circuit is used to the transmission signal being integrated into being sent to demodulator circuit by modulation circuit；The demodulator circuit is used to be integrated into transmission signal and is demodulated to the temperature signal of each temperature sensor and it is parallel Pass to the signal conditioning module；The signal conditioning module includes analog switch module, conditioning circuit and modulus conversion chip；The input terminal of the analog switch module is connected with the demodulator circuit, and output end passes through the conditioning circuit and the mould The input terminal of number conversion chip is connected, and control terminal is connected with the main control unit；Analog switch module is used for according to main control unit Instruction convert the temperature signal of parallel each temperature sensor to serially according to predetermined temperature sorting sensor Signal, and pass it to the conditioning circuit；The serial signal conditioning that the conditioning circuit is used to input is within the scope of the modulus conversion chip analog-to-digital conversion After analog signal, the modulus conversion chip is passed it to；The modulus conversion chip is used to convert corresponding digital information for the analog signal that conditioning circuit exports, and is passed Pass the main control unit；The main control unit includes microcontroller, memory module, GPRS remote transmission module and USB module；The microcontroller is connected with memory module, GPRS remote transmission module, USB module, analog switch modular electrical respectively, For controlling analog switch module according to predetermined temperature sorting sensor for the temperature of parallel each temperature sensor Signal is converted into serial signal, and the digital information after modulus conversion chip is converted is stored to memory module, and it is remote to control GPRS Journey transmission module modulus conversion chip is converted after the i.e. each temperature sensor of digital information temperature information be sent to it is upper Machine；Temperature information of the USB module for each temperature sensor in manual download storage module.
- The amount temperature point on-Line Monitor Device 2. low temperature environment according to claim 1 is plunged into the commercial sea, which is characterized in that the temperature Sensor uses thermistor.
- The amount temperature point on-Line Monitor Device 3. low temperature environment according to claim 1 is plunged into the commercial sea, which is characterized in that the power supply Module uses solar panels.
- 4. it is plunged into the commercial sea the single line transmission method of amount temperature point on-Line Monitor Device based on low temperature environment described in claim, feature It is comprising the steps of:Step 1), enabling the quantity of temperature sensor is n, transmission channel bandwidth B, the total frequency band of preset transmission signal occupancy For FAlways, the empty band bandwidth between the temperature signal of preset adjacent temperature sensor is fIt is empty, B > FAlways；Bandwidth F shared by the temperature signal of each temperature sensor is calculated according to the following formulaMark:Step 2), according to bandwidth F shared by the temperature signal of each temperature sensorMark, adjacent temperature sensor temperature signal Between empty band bandwidth fIt is empty, occur carrier wave oscillator initial oscillation frequency F0, it is corresponding to calculate each temperature sensor Carrier frequency:fcm=F0+(FMark+fIt is empty)(n-m)In formula, fcmFor the carrier frequency of m-th of temperature sensor temperature information；Step 3) adjusts the temperature information of each temperature sensor according to the corresponding carrier frequency of each temperature sensor System, is integrated into transmission signal；The transmission signal being integrated into is passed to carrier-frequency circuit by step 4), modulation circuit, and carrier-frequency circuit believes the transmission being integrated into Number demodulator circuit is sent to by modulation circuit.
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| CN201811486661.4A CN109459151B (en) | 2018-12-06 | 2018-12-06 | Device and method for monitoring mass temperature points on line under low-temperature background |
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| CN201811486661.4A CN109459151B (en) | 2018-12-06 | 2018-12-06 | Device and method for monitoring mass temperature points on line under low-temperature background |
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| CN109459151A true CN109459151A (en) | 2019-03-12 |
| CN109459151B CN109459151B (en) | 2024-02-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110926645A (en) * | 2019-12-19 | 2020-03-27 | 深圳市中新力电子科技有限公司 | Big data monitoring multichannel temperature acquisition circuit |
| CN114088245A (en) * | 2021-11-17 | 2022-02-25 | 成都海光微电子技术有限公司 | Temperature detection device and detection method |
| CN114636484A (en) * | 2022-05-09 | 2022-06-17 | 深圳市航顺芯片技术研发有限公司 | Digital temperature sensor, chip temperature detection system and chip temperature detection method |
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