CN202255672U - Temperature measuring system - Google Patents

Temperature measuring system Download PDF

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Publication number
CN202255672U
CN202255672U CN2011204067163U CN201120406716U CN202255672U CN 202255672 U CN202255672 U CN 202255672U CN 2011204067163 U CN2011204067163 U CN 2011204067163U CN 201120406716 U CN201120406716 U CN 201120406716U CN 202255672 U CN202255672 U CN 202255672U
Authority
CN
China
Prior art keywords
temperature
resistance
analog
value
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2011204067163U
Other languages
Chinese (zh)
Inventor
魏杰
胡祺君
钱卫东
金欣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SUZHOU SOLAR TECHNOLOGY Co Ltd
Original Assignee
SUZHOU SOLAR TECHNOLOGY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SUZHOU SOLAR TECHNOLOGY Co Ltd filed Critical SUZHOU SOLAR TECHNOLOGY Co Ltd
Priority to CN2011204067163U priority Critical patent/CN202255672U/en
Application granted granted Critical
Publication of CN202255672U publication Critical patent/CN202255672U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model provides a temperature measuring system, which is a circuit with zero temperature drift of a hardware resistance bridge and consists of a full-bridge circuit, a divider resistor R1 and a rectifying diode D1, wherein the full-bridge circuit is composed of an analog temperature sensor RT, a resistor R2, a resistor R3 and resistors R4 and R5. The resistors R2, R3, R4 and R5 form the full-bridge circuit, the resistance value change of the analog temperature sensor RT is corresponding to the voltage value change of the input end of an operational amplifier U1, and MCU (Microprogrammed Control Unit) can accurately and quickly measure the temperature value through ADC (Analog To Digital Converter) analog-digital conversion. The temperature measuring system can effectively and accurately provide the temperature value which can be processed by upper computer software, the temperature measuring system has stable measurement, sensitive temperature sensing and high measurement speed, and the operation of the upper computer software is simple and effective.

Description

A kind of temperature measurement system
Technical field
The utility model relates to a kind ofly can measure temperature at a high speed accurately, and other circuit is disturbed almost nil, can be placed on other sensors next doors and do the temperature measurement system that temperature compensation is used.
Background technology
Industry at present go up to thermometric require increasingly high, and general digital temperature sensor, such as DS18B20, measuring speed is slow, degree of accuracy is low, it is big especially small signal circuit to be disturbed, and is not accepted by industry.How could efficient, accurate, high speed is measured temperature and other circuit is not disturbed, and can use this technology.
Along with development of semiconductor; Various sensors appear in face of us, and the sensor temperature influence is a lot, how accurately to test out the signal of wanting through sensor; That must do temperature compensation to test signal, and this just needs efficiently accurately to test out temperature and does the software temperature compensation.
Electronic technology growing, the traditional hardware circuit design can't satisfy the hyundai electronics demand.
The utility model content
In order to solve the problem of above-mentioned background technology; The utility model provides a kind of temperature measurement system; Adopt MCU microprocessor ARM11 chip, adopt the curve fitting implementation algorithm to realize temperature survey, degree of accuracy can arrive 0.01 ℃; Measuring speed can reach 10us once according to the decision of ADC slewing rate.
To achieve these goals, the utility model adopts following technical scheme to be:
A kind of temperature measurement system; Said temperature measurement system is the circuit that hardware resistance bridge zero temperature is waftd; Its bridge-type circuit of being made up of analog temperature sensor RT, resistance R 2, resistance R 3, resistance R 4 and R5, divider resistance R1 and commutation diode D1 form, and said resistance R 2, R3, R4 and R5 form the bridge-type circuit, the variation of the corresponding magnitude of voltage with amplifier U1 input end of analog temperature sensor RT resistance change; Through the ADC analog-to-digital conversion, MCU just accurately high speed test go out temperature value.
Preferred said commutation diode D1 is the temperature very little commutation diode that wafts; Said temperature sensor RT is thermally sensitive resistance; Analog temperature sensor RT and R3 are connected in parallel in the circuit, and resistance R 2 equates that with resistance R 4 resistances the resistance of resistance R 3 and resistance R 5 equates.
The beneficial effect of the utility model is: can efficiently accurately provide upper software manageable temperature value; Need in the electronic system of temperature compensation algorithm most suitable at some; Brightness and wavelength such as measuring optical are to do temperature compensation; Also can use in senior thermometric instruments, its stable testing, temperature sense are responsive, measuring speed is fast, and upper computer software is simple to operate efficient.
Description of drawings
Fig. 1 is the utility model structural representation
Fig. 2 is the curve map of RT temperature sensor resistance value and temperature
Fig. 3 is the curve map between AD value and the temperature
Fig. 4 is the curve fitting figure between AD value and the temperature
Embodiment
Below in conjunction with accompanying drawing the preferred embodiment of the utility model is done to set forth in detail, thereby the protection domain of the utility model is made more explicit defining so that advantage of the utility model and characteristic can be easier to it will be appreciated by those skilled in the art that.
As shown in Figure 1 a kind of temperature test system; RT is an analog temperature sensor, is placed on sensor to be measured next door and does temperature compensation, and resistance R 2, R3, R4 and R5 form a bridge-type circuit; Eliminating the influence of temperature to resistance value, also is that a kind of hardware is realized the method that resistance zero temperature is waftd.R1 is a divider resistance, and D1 is a commutation diode, and the resistance bridge voltage is constant in a fixing magnitude of voltage, and D1 is the temperature very little commutation diode that wafts.Temperature sensor RT is thermally sensitive resistance, and RT and R3 are connected in parallel in the circuit, and R2 and R4 resistance value equate usually, and the resistance of R3 and R5 equates.Do not have on the place in circuit if the RT resistance value is infinity or RT, the magnitude of voltage that gets into amplifier U1 input end equates.The variation of the corresponding magnitude of voltage with amplifier U1 input end of RT resistance change, through the ADC analog-to-digital conversion, MCU just accurately high speed test go out temperature value.
The X axle is a resistance value among Fig. 2, and unit is ohm, and the Y axle is a temperature value, and unit is degree centigrade.This curve map is the curve that draws and according to data importing matlab inside the Datasheet of temperature sensor.
To be the RT temperature sensor get into the AD value of MCU microprocessor and the curve map between the temperature through resistance bridge, amplifier and ADC analog to digital converter to Fig. 3, and the X axle is an AD value, and the Y axle is a temperature value, like this AD value with regard to and temperature value correspondence one by one.Fig. 2 has just done the ball bearing made using analysis with matlab to Fig. 3, and ADC is the analog to digital converter of 16bits.
The resistance bridge that the temperature sensor of simulation wafts through zero temperature; Very accurate resistance value correspondence and the magnitude of voltage that gets into amplifier with the RT temperature sensor; Be converted into the AD value to resistance value through the ADC analog to digital converter again; Just the temperature value with to be measured is corresponding one by one for the AD value like this, and the MCU microprocessor is read the AD value and just can be known temperature value to be measured like this.
The above; Be merely one of embodiment of the utility model; But the protection domain of the utility model is not limited thereto; Any those of ordinary skill in the art are in the technical scope that the utility model disclosed, and variation or the replacement that can expect without creative work all should be encompassed within the protection domain of the utility model.Therefore, the protection domain of the utility model should be as the criterion with the protection domain that claims were limited.

Claims (2)

1. temperature measurement system; It is characterized in that; Said temperature measurement system is the circuit that hardware resistance bridge zero temperature is waftd; Its bridge-type circuit of being made up of analog temperature sensor RT, resistance R 2, resistance R 3, resistance R 4 and R5, divider resistance R1 and commutation diode D1 form, and said resistance R 2, R3, R4 and R5 form the bridge-type circuit, the variation of the corresponding magnitude of voltage with amplifier U1 input end of analog temperature sensor RT resistance change; Through the ADC analog-to-digital conversion, MCU just accurately high speed test go out temperature value.
2. a kind of temperature measurement system according to claim 1; It is characterized in that; Said commutation diode D1 is the temperature very little commutation diode that wafts, and said temperature sensor RT is thermally sensitive resistance, and analog temperature sensor RT and R3 are connected in parallel in the circuit; Resistance R 2 equates that with resistance R 4 resistances the resistance of resistance R 3 and resistance R 5 equates.
CN2011204067163U 2011-10-24 2011-10-24 Temperature measuring system Expired - Fee Related CN202255672U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011204067163U CN202255672U (en) 2011-10-24 2011-10-24 Temperature measuring system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011204067163U CN202255672U (en) 2011-10-24 2011-10-24 Temperature measuring system

Publications (1)

Publication Number Publication Date
CN202255672U true CN202255672U (en) 2012-05-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011204067163U Expired - Fee Related CN202255672U (en) 2011-10-24 2011-10-24 Temperature measuring system

Country Status (1)

Country Link
CN (1) CN202255672U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104956272A (en) * 2013-01-29 2015-09-30 洋马株式会社 Controller
CN106920447A (en) * 2017-05-10 2017-07-04 江苏新安电器有限公司 A kind of refrigerator testing analogue means
CN108241393A (en) * 2016-12-27 2018-07-03 佛山市顺德区美的电热电器制造有限公司 Control system, control method and the household electrical appliance of radio temperature sensor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104956272A (en) * 2013-01-29 2015-09-30 洋马株式会社 Controller
CN104956272B (en) * 2013-01-29 2017-06-30 洋马株式会社 Controller
CN108241393A (en) * 2016-12-27 2018-07-03 佛山市顺德区美的电热电器制造有限公司 Control system, control method and the household electrical appliance of radio temperature sensor
CN106920447A (en) * 2017-05-10 2017-07-04 江苏新安电器有限公司 A kind of refrigerator testing analogue means

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Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120530

Termination date: 20161024