CN202974477U - Temperature data acquisition device - Google Patents
Temperature data acquisition device Download PDFInfo
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- CN202974477U CN202974477U CN201220531280.5U CN201220531280U CN202974477U CN 202974477 U CN202974477 U CN 202974477U CN 201220531280 U CN201220531280 U CN 201220531280U CN 202974477 U CN202974477 U CN 202974477U
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Abstract
The utility model discloses a temperature data acquisition device. The temperature data acquisition device comprises a plurality of temperature sensors, a DC bridge, a signal amplifying circuit, a multi-path analog switch, an A/D converter, a single-chip microcomputer, and a data acquisition module, wherein signal output ends of the temperature sensors are respectively connected with a signal input end of the DC bridge, a signal output end of the DC bridge is connected with a signal input end of the corresponding signal amplifying circuit, a signal output end of the signal amplifying circuit is connected with a signal input end of the multi-path analog switch, a signal output end of the multi-path analog switch is connected with a signal input end of the A/D converter, the A/D converter is connected with a signal input end of the data acquisition module, a signal output end of the data acquisition module is connected with a signal input end of the single-chip microcomputer, and a signal output end of the single-chip microcomputer is connected with the signal input end of the multi-path analog switch. The temperature measurement in three ways is realized, so as to satisfy the requirements of the different measurement ranges, different measurement precisions and different occasions.
Description
Technical field
The utility model relates to a kind of temperature data acquisition device, particularly relates to a kind of temperature data acquisition device that can satisfy different measuring scope, different measuring precision.
Background technology
In existing market, the measurement range of most of Temperature samplers, metering system and measuring accuracy are just fixing when dispatching from the factory.Metering system is single, measurement range is fixed, sensing mode also can only adapt to certain occasion.Therefore can not well be suitable for the occasion of some many metering systems and measurement range.Moreover their process of measurement is fixing with the database of tabling look-up, and has the occasion of specific (special) requirements not to be suitable for for some.
Summary of the invention
The purpose of this utility model is that a kind of temperature data acquisition device that can satisfy different measuring scope, different measuring precision is provided in order to address the above problem.
The utility model is achieved through the following technical solutions:
a kind of temperature data acquisition device, comprise a plurality of temperature sensors, direct current bridge, signal amplification circuit, multiway analog switch, A/D converter, single-chip microcomputer, data acquisition module, light-emitting diode display and storer, the signal output part of a plurality of described temperature sensors connects from the signal input part of different direct current bridge respectively, the signal output part of each described direct current bridge connects with the signal input part of corresponding signal amplification circuit, the signal output part of described signal amplification circuit is connected with the signal input part of described multiway analog switch, the signal output part of described multiway analog switch is connected with the signal input part of described A/D converter, described A/D converter is connected with the signal input part of described data acquisition module, the signal output part of described data acquisition module is connected with the signal input part of described single-chip microcomputer, the signal output part of described single-chip microcomputer and the signal input part of described multiway analog switch, the signal input part of described LED single-chip microcomputer be connected number letter input end of storer and connect.
Because different sensors has different output quantities, still finally all need to be converted to the magnitude of voltage of 0～10V, thereby could satisfy the conversion requirement of A/D converter.Therefore each sensor needs different conversion and amplifying circuit.Voltage after conversion is selected to deliver to same A/D converter through multiway analog switch and is changed, and the data transmission after data acquisition module will change is to single-chip microcomputer, then carries out data through single-chip microcomputer and process and show and export.
Further, described temperature sensor is thermocouple temperature sensor, thermal resistance temperature sensor or PN junction temperature sensor.
The beneficial effects of the utility model are:
The utility model can be realized the temperature survey of 3 kinds of modes.Can satisfy the needs of different measuring scope, different measuring precision and different occasions.Adopt Single-chip Controlling to make the control of whole Temperature sampler more accurate, adopt the 12ADC analog to digital converter, make measuring accuracy be greatly improved.
Description of drawings
Fig. 1 is the structural representation of the utility model temperature data acquisition device.
Embodiment
The utility model is described in further detail below in conjunction with drawings and the specific embodiments:
as shown in Figure 1, the utility model temperature data acquisition device, comprise a plurality of temperature sensors, direct current bridge, signal amplification circuit, multiway analog switch, A/D converter, single-chip microcomputer, data acquisition module, light-emitting diode display and storer, the signal output part of a plurality of described temperature sensors connects from the signal input part of different direct current bridge respectively, the signal output part of each described direct current bridge connects with the signal input part of corresponding signal amplification circuit, the signal output part of described signal amplification circuit is connected with the signal input part of described multiway analog switch, the signal output part of described multiway analog switch is connected with the signal input part of described A/D converter, described A/D converter is connected with the signal input part of described data acquisition module, the signal output part of described data acquisition module is connected with the signal input part of described single-chip microcomputer, the signal output part of described single-chip microcomputer and the signal input part of described multiway analog switch, the signal input part of described LED single-chip microcomputer be connected number letter input end of storer and connect.
Because different sensors has different output quantities, still finally all need to be converted to the magnitude of voltage of 0～10V, thereby could satisfy the conversion requirement of A/D converter.Therefore each sensor needs different conversion and amplifying circuit.Voltage after conversion is selected to deliver to same A/D converter through multiway analog switch and is changed, and the data transmission after data acquisition module will change is to single-chip microcomputer, then carries out data through single-chip microcomputer and process and show and export.
In the present embodiment, adopt 3 temperature sensors, the first temperature sensor adopts thermocouple temperature sensor, and the second temperature sensor adopts thermal resistance temperature sensor, and three-temperature sensor adopts the PN junction temperature sensor.What the PN junction temperature sensor varied with temperature generation due to PN junction is a voltage signal, 1 ℃ of the every rising of temperature, the forward conduction voltage drop of PN junction 1 mV that descends.But requiring output voltage in the time of 0 ℃ is 0 V, therefore PN junction must be connected into the single armed unbalanced dc bridge.And output voltage is amplified to 0～10 V scope send the A/D change-over circuit.The measurement range of PN junction temperature sensor is 20～100 ℃.What thermal resistance temperature sensor varied with temperature generation is a resistance signal, and resistance value increases when temperature raises.Therefore thermal resistance must be connected into the single armed direct current bridge, its change in resistance is converted to voltage change signal.0～10 V scope that again this voltage signal is amplified to is sent the A/D change-over circuit.The measurement range of thermal resistance temperature sensor is 0～800 ℃.The output of thermocouple temperature sensor is a temperature variant voltage signal, and it must add that cold junction compensation circuit could work, and the scope that its output also will be converted to 0～10 V is sent the A/D change-over circuit.The measurement range of thermocouple temperature sensor is 0～1 000 ℃.
Claims (2)
1. temperature data acquisition device, it is characterized in that: comprise a plurality of temperature sensors, direct current bridge, signal amplification circuit, multiway analog switch, A/D converter, single-chip microcomputer, data acquisition module, light-emitting diode display and storer, the signal output part of a plurality of described temperature sensors connects from the signal input part of different direct current bridge respectively, the signal output part of each described direct current bridge connects with the signal input part of corresponding signal amplification circuit, the signal output part of described signal amplification circuit is connected with the signal input part of described multiway analog switch, the signal output part of described multiway analog switch is connected with the signal input part of described A/D converter, described A/D converter is connected with the signal input part of described data acquisition module, the signal output part of described data acquisition module is connected with the signal input part of described single-chip microcomputer, the signal output part of described single-chip microcomputer and the signal input part of described multiway analog switch, the signal input part of described LED single-chip microcomputer be connected number letter input end of storer and connect.
2. temperature data acquisition device according to claim 1, it is characterized in that: described temperature sensor is thermocouple temperature sensor, thermal resistance temperature sensor or PN junction temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220531280.5U CN202974477U (en) | 2012-10-17 | 2012-10-17 | Temperature data acquisition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220531280.5U CN202974477U (en) | 2012-10-17 | 2012-10-17 | Temperature data acquisition device |
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| CN202974477U true CN202974477U (en) | 2013-06-05 |
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| CN201220531280.5U Expired - Fee Related CN202974477U (en) | 2012-10-17 | 2012-10-17 | Temperature data acquisition device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103353354A (en) * | 2013-07-24 | 2013-10-16 | 国家电网公司 | Method for monitoring temperature of power transformer by using PN-junction temperature sensor |
| CN103776554A (en) * | 2012-10-17 | 2014-05-07 | 成都龙冠科技实业有限公司 | Temperature data acquisition device |
| CN104614089A (en) * | 2015-02-12 | 2015-05-13 | 顾道金 | Self-diagnosis intelligent temperature sensing device and self-diagnosis method |
| CN104697641A (en) * | 2015-03-17 | 2015-06-10 | 太原市同心得科贸有限公司 | STM32-based (STMicroelectronics 32) infrared temperature sensor |
| CN108052149A (en) * | 2013-09-02 | 2018-05-18 | 瑞萨电子株式会社 | Signal generating circuit |
-
2012
- 2012-10-17 CN CN201220531280.5U patent/CN202974477U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776554A (en) * | 2012-10-17 | 2014-05-07 | 成都龙冠科技实业有限公司 | Temperature data acquisition device |
| CN103353354A (en) * | 2013-07-24 | 2013-10-16 | 国家电网公司 | Method for monitoring temperature of power transformer by using PN-junction temperature sensor |
| CN108052149A (en) * | 2013-09-02 | 2018-05-18 | 瑞萨电子株式会社 | Signal generating circuit |
| CN108052149B (en) * | 2013-09-02 | 2020-07-24 | 瑞萨电子株式会社 | Signal generating circuit |
| CN104614089A (en) * | 2015-02-12 | 2015-05-13 | 顾道金 | Self-diagnosis intelligent temperature sensing device and self-diagnosis method |
| CN104697641A (en) * | 2015-03-17 | 2015-06-10 | 太原市同心得科贸有限公司 | STM32-based (STMicroelectronics 32) infrared temperature sensor |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20131017 |