CN104296885A - Temperature tester - Google Patents
Temperature tester Download PDFInfo
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- CN104296885A CN104296885A CN201410461230.8A CN201410461230A CN104296885A CN 104296885 A CN104296885 A CN 104296885A CN 201410461230 A CN201410461230 A CN 201410461230A CN 104296885 A CN104296885 A CN 104296885A
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Abstract
The invention relates to a testing device, in particular to a temperature testing device. A temperature tester is formed by a temperature signal acquisition unit, a single-chip microcomputer data processing unit and an output unit, wherein the temperature signal acquisition unit, the single-chip microcomputer data processing unit and the output unit are connected in sequence. The temperature signal acquisition unit comprises a temperature sensor, a signal amplification conditioning circuit and an A/D conversion circuit, wherein the temperature sensor, the signal amplification conditioning circuit and the A/D conversion circuit are connected in sequence, and the A/D conversion circuit is connected with the single-chip microcomputer data processing unit. According to a temperature measuring system, the PT100 temperature sensor transmits signals amplified and converted by means of the A/D converter to a single-chip microcomputer so that control temperature can be displayed. Besides, a temperature alarm function can be achieved through external circuit extension, so that real-time control of temperature in situ is better achieved.
Description
Technical field
The present invention relates to a kind of proving installation, be specifically related to a kind of temperature testing device.
Background technology
Temperature sensor is broadly divided into contact and contactless two large classes from the angle used, the former allows temperature sensor directly contact with object under test, and the latter makes temperature sensor and object under test leave certain distance, detect the infrared ray radiated from object under test, reach the object of thermometric.In contact and contactless two large class temperature sensors, compare that to use many be touch sensor, non-contacting sensor generally just uses in more special occasion, the contact type temperature sensor be used widely at present mainly contains thermoelectric transducer, what wherein temperature variation is converted to resistance variations is called thermal resistance sensor, and what temperature variation is converted to thermoelectrical potential change is called thermocouple sensor.
Thermal resistance sensor can be divided into metal thermoelectric resistive and the large class of semiconductor heat resistance-type two, and the former is called for short thermal resistance, and the latter is called for short thermistor.Conventional thermal resistance material has platinum, copper, nickel, iron etc., and it has high-temperature coefficient, high resistivity, chemistry, stable physical property, good linear output character etc., and conventional thermal resistance is as PT100, PT1000 etc.Each semiconductor manufacturer develops digital temperature sensor successively in recent years, as DALLAS company DS18B20, the MAX6576 of MAXIM company, MAX6577, the AD7416 etc. of ADI company, the remarkable advantage of these chips is simple with the interface of single-chip microcomputer, if this temperature sensor of DS18B20 is Single Wire Bus Technology, 2 kinds of temperature sensors one of MAXIM company are rate-adaptive pacemaker, one is cycle output, its essence is numeral and exports, the digital interface of the AD7416 of ADI company is then in recent years also popular I2C bus, these temperature sensor chip all with digital interface itself brings great convenience to user, but the disadvantage of this kind of device is that the scope of thermometric is too narrow, generally only have-55 ~+125 DEG C, and the measuring accuracy of temperature is not high, good ± 0.5 DEG C, generally have ± about 2 DEG C, therefore the needs of user are not too met in high-precision occasion.
Thermopair applies also thermoelectric transducer very widely in current contact temperature-measuring, and it has, and structure is simple, easily manufactured, temperature-measuring range is wide, thermal inertia is little, accuracy is high, output signal is convenient to the advantages such as teletransmission.Conventional thermocouple material has platinum Pt Rh, iridium rhodium-iridium, ferronickel-ambrose alloy, copper constantan etc., and the thermopair of various different materials is used in different temperature-measuring range occasions.The use error of thermopair mainly comes from the site error etc. of the error of division, extension wire error, dynamic error and use.
Summary of the invention
The present invention aims to provide a kind of temperature measuring device.
Technical program of the present invention lies in:
A kind of temperature measuring device, by temperature signal collection unit, singlechip data processing unit and output unit composition; Wherein, connected in turn by temperature signal collection unit, singlechip data processing unit and output unit.
Preferably, described temperature signal collection cell mesh comprises the temperature sensor, signal amplifying and conditioning circuit and the A/D change-over circuit that connect successively, A/D change-over circuit brace machine data processing unit.
More preferably, described temperature sensor adopts PT100 sensor.
Or preferably, described output unit is LCD liquid crystal display circuit and printing interface, and is connected with singlechip data processing unit respectively.
Or preferably, described singlechip data processing unit single-chip microcomputer model used is AT89C51.
More preferably, described singlechip data processing unit also connects a communication interface.
More preferably, described singlechip data processing unit also connects a key control circuit.
Technique effect of the present invention is:
Error of the present invention is little, and structure is simple, is easy to promote.Adopt PT100 temperature sensor to deliver to single-chip microcomputer through amplification and A/D converter and carry out control temperature display, native system can also realize temperature alarming function by external circuits expansion in addition, thus better realizes the real-time control at temperature scene.
Accompanying drawing explanation
Fig. 1 is the system chart of a kind of temperature measuring device of native system.
Embodiment
A kind of temperature measuring device, by temperature signal collection unit, singlechip data processing unit and output unit composition; Wherein, connected in turn by temperature signal collection unit, singlechip data processing unit and output unit.Described temperature signal collection cell mesh comprises the temperature sensor, signal amplifying and conditioning circuit and the A/D change-over circuit that connect successively, A/D change-over circuit brace machine data processing unit.Described temperature sensor adopts PT100 sensor.Output unit is LCD liquid crystal display circuit and printing interface, and is connected with singlechip data processing unit respectively.Singlechip data processing unit single-chip microcomputer model used is AT89C51.Singlechip data processing unit also connects a communication interface.Described singlechip data processing unit also connects a key control circuit.
AT89C51 is a kind of low-voltage, high-performance CMOS 8-bit microprocessor of band 4K byte Flash-Programmable erasable read-only memory (FPEROM-Flash Programmable and Erasable Read Only Memory), is commonly called as single-chip microcomputer.AT89C2051 is a kind of single-chip microcomputer with 2K byte Flash-Programmable erasable read-only memory.The erasable read-only memory of single-chip microcomputer can wipe 1000 times repeatedly.This device adopts ATMEL high density nonvolatile memory manufacturing technology to manufacture, with the MCS-51 instruction set of industrial standard and output pin mutually compatible.Owing to being combined in one single chip by multi-functional 8 bit CPUs and flash memory, the AT89C51 of ATMEL is a kind of efficient microcontroller, and AT89C2051 is its a kind of compact version.AT89C51 single-chip microcomputer is that a lot of embedded control system provides the high and inexpensive scheme of a kind of dirigibility.
Liquid crystal display is that a kind of LCD Controlling penetrability technology that have employed is to realize the display of color.And CRT
Display is compared, and the advantage of LCD is clearly.Because by controlling, whether printing opacity controls bright and dark, when color is constant, liquid crystal also remains unchanged, and so just need not consider the problem of refresh rate.For the liquid crystal display of frame stabilization, flicker free sense, refresh rate is not high but image is also very stable.LCD display also allows base plate Integral luminous by the know-why of LCD Controlling penetrability, so it has accomplished real complete plane.
The mimic channel of thermometric is the resistance value current PT100 thermal resistance sensor, be converted to the magnitude of voltage easily measured, give after amplifier amplifies signals after A/D converter transfers digital signal to analog voltage and pass to AT89C51 system, single-chip microcomputer is converted to temperature value according to formula scales the resistance value of the temperature sensor measured again, and data are passed out to LCD display shows.
This temperature measurement system designs, adopt PT100 temperature sensor to deliver to single-chip microcomputer through amplification and A/D converter to carry out control temperature display, native system can also realize temperature alarming function by external circuits expansion in addition, thus better realizes the real-time control at temperature scene.
Claims (7)
1. a temperature measuring device, is characterized in that: by temperature signal collection unit, singlechip data processing unit and output unit composition; Wherein, connected in turn by temperature signal collection unit, singlechip data processing unit and output unit.
2. as claim 1 temperature measuring device, it is characterized in that: described temperature signal collection cell mesh comprises the temperature sensor, signal amplifying and conditioning circuit and the A/D change-over circuit that connect successively, A/D change-over circuit brace machine data processing unit.
3. as claim 2 temperature measuring device, it is characterized in that: described temperature sensor adopts PT100 sensor.
4., as claim 1 temperature measuring device, it is characterized in that: described output unit is LCD liquid crystal display circuit and printing interface, and is connected with singlechip data processing unit respectively.
5. as claim 1 temperature measuring device, it is characterized in that: described singlechip data processing unit single-chip microcomputer model used is AT89C51.
6., as claim 1 temperature measuring device, it is characterized in that: described singlechip data processing unit also connects a communication interface.
7., as claim 1 temperature measuring device, it is characterized in that: described singlechip data processing unit also connects a key control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410461230.8A CN104296885A (en) | 2014-09-11 | 2014-09-11 | Temperature tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410461230.8A CN104296885A (en) | 2014-09-11 | 2014-09-11 | Temperature tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104296885A true CN104296885A (en) | 2015-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410461230.8A Pending CN104296885A (en) | 2014-09-11 | 2014-09-11 | Temperature tester |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277293A (en) * | 2015-07-27 | 2016-01-27 | 深圳市振邦智能科技有限公司 | Temperature detection method and system |
| CN105424212A (en) * | 2015-12-27 | 2016-03-23 | 哈尔滨米米米业科技有限公司 | High-precision temperature measurement system based on resistance value comparison method |
| CN105806505A (en) * | 2016-03-23 | 2016-07-27 | 哈尔滨工程大学 | GSM-based high-precision remote temperature monitoring system |
| CN106840424A (en) * | 2017-02-10 | 2017-06-13 | 太仓鼎诚电子科技有限公司 | A kind of temperature measurement system |
| CN110043457A (en) * | 2019-04-24 | 2019-07-23 | 上海外高桥造船有限公司 | The adjustment method of Cargo Oil pumping system |
-
2014
- 2014-09-11 CN CN201410461230.8A patent/CN104296885A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277293A (en) * | 2015-07-27 | 2016-01-27 | 深圳市振邦智能科技有限公司 | Temperature detection method and system |
| CN105424212A (en) * | 2015-12-27 | 2016-03-23 | 哈尔滨米米米业科技有限公司 | High-precision temperature measurement system based on resistance value comparison method |
| CN105806505A (en) * | 2016-03-23 | 2016-07-27 | 哈尔滨工程大学 | GSM-based high-precision remote temperature monitoring system |
| CN106840424A (en) * | 2017-02-10 | 2017-06-13 | 太仓鼎诚电子科技有限公司 | A kind of temperature measurement system |
| CN110043457A (en) * | 2019-04-24 | 2019-07-23 | 上海外高桥造船有限公司 | The adjustment method of Cargo Oil pumping system |
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Application publication date: 20150121 |