CN202956210U - Temperature sensor circuit structure based on single wire connection - Google Patents
Temperature sensor circuit structure based on single wire connection Download PDFInfo
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- CN202956210U CN202956210U CN 201220558906 CN201220558906U CN202956210U CN 202956210 U CN202956210 U CN 202956210U CN 201220558906 CN201220558906 CN 201220558906 CN 201220558906 U CN201220558906 U CN 201220558906U CN 202956210 U CN202956210 U CN 202956210U
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- temperature sensor
- chip microcomputer
- circuit structure
- sensor circuit
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Abstract
The utility model discloses a temperature sensor circuit structure based on single wire connection. The temperature sensor circuit structure comprises a temperature sensor connected with a one-chip microcomputer which is a control module for controlling the temperature sensor to collect temperature signals, wherein the temperature sensor, a digital temperature sensor, converts a temperature value detected into a digital value, and the one-chip microcomputer and temperature sensor are connected with a power supply. The temperature sensor circuit structure is simple in structure, and reasonable in design. A conventional temperature sensor is replaced by a digital temperature sensor, which overcomes the defect that an A/D converter is a must for connecting with a one-chip microcomputer. The temperature sensor circuit structure is high in integration level, and the peripheral hardware circuit is simple and highly precise.
Description
Technical field
The utility model relates to the temperature sensor technical field, specifically, is based on the temperature sensor circuit structure that single line connects.
Background technology
The profile that temperature sensor is small and exquisite with it, the every field that just is being widely used in production practices, more our life provides countless facility and function, the selection of temperature sensor kind is more on the market at present, the temperature elements such as thermopair, thermal resistance can be used, also integrated temperature sensor can be selected.In the prior art, people adopt the integrated simulation sensor as measuring sensor more, it is the current-output type temperature sensor that a kind of relation of utilizing PN junction forward current and temperature is made, at dut temperature one regularly, be equivalent to a constant current source, as current use AD590 sensor comparatively widely, during use, this device not only has good linearity and interchangeability, measuring accuracy is high, also there is the characteristic of eliminating power-supply fluctuation, even power supply changes between 5～15V, its electric current is also just being made subtle change below 1, but as the integrated simulation sensor, when application, need to carry out the A/D conversion toward contact could be connected with controller, so-called A/D conversion is to convert this non-electrical signal of temperature to voltage signal by A/D converter, in transfer process, restriction due to the A/D converter technical indicator, tend to reduce the work efficiency of temperature sensor, as: the quantization error caused due to the limited resolution of A/D converter, the sampling rate of sensor must be less than or equal to A/D converter switching rate etc.
The utility model content
The purpose of this utility model is to provide the temperature sensor circuit structure connected based on single line, adopt digital temperature sensor to replace traditional integrated simulation sensor, can realize being connected with the direct of single-chip microcomputer, improved the work efficiency of sensor, integrated level is high, and the peripheral hardware circuit is simple.
The utility model is achieved through the following technical solutions: the temperature sensor circuit structure connected based on single line, comprise the temperature sensor be connected with single-chip microcomputer, described single-chip microcomputer carries out the control module of temperature signal collection for controlling temperature sensor, described temperature sensor is for directly changing into the detected temperatures value digital temperature sensor of digital quantity, described single-chip microcomputer, digital temperature sensor all is connected with power supply, the integrated level of digital temperature sensor is high, effectively simplified the circuit structure of peripheral hardware, in the prior art, temperature sensor mostly is the integrated simulation sensor, as: the AD590 sensor, it with single-chip microcomputer between communicate by letter and need to carry out A/D conversion and could realize, the circuit structure complexity, and precision is lower.
Circuit structure of the present utility model is as follows: described digital temperature sensor comprises 1 pin be connected with power cathode, 2 pins that are connected with positive source and 3 pins that are connected with single-chip microcomputer, and described 3 pins are connected with single-chip microcomputer by data line.
3 pins described in the utility model are connected with single-chip microcomputer by the I/O line.
On described single-chip microcomputer pin, definition has serial line interface RD, described 3 pins are connected on serial line interface RD by the I/O line, during application, the temperature data of digital temperature sensor collection carries out data communication by the I/O line with mode and the serial line interface RD of serial communication, and the signal detected is sent to single-chip microcomputer.
Described digital temperature sensor adopts 3 pin encapsulation, and when making, pin is produced on para tape and from the encapsulation both sides and draws, and utilizes automatic band to carry the encapsulation of welding (TAB) technology, and profile is very thin.
The utility model compared with prior art, has the following advantages and beneficial effect:
(1) the utility model adopts digital temperature sensor to replace traditional temperature sensor, has avoided the drawback of using A/D converter to be connected with single-chip microcomputer, has integrated level high, and the peripheral hardware circuit is simple, the precision high.
(2) of the present utility model reasonable in design, during application, can adopt the circuit structure of a plurality of digital temperature sensor parallel connections, applied range, can effectively simplify the circuit structure of whole signal acquiring system.
(3) the utility model adopts 3 pin encapsulation, and pin is produced on para tape and from the encapsulation both sides and draws, and adopts automatic band to carry the encapsulation of welding (TAB) technology, and profile is very thin.
The accompanying drawing explanation
Fig. 1 is electrical block diagram of the present utility model.
Electrical block diagram when Fig. 2 is three digital temperature sensors of the utility model employing.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail, but embodiment of the present utility model is not limited to this.
Embodiment:
In the prior art, people adopt the integrated simulation sensor as measuring sensor more, during use, need could be connected with controller (that is: single-chip microcomputer) by A/D converter conversion, A/D converter can convert this non-electrical signal of temperature to voltage signal and transfer to single-chip microcomputer, in transfer process, restriction due to the A/D converter technical indicator, tend to reduce the work efficiency of temperature sensor, as: the quantization error caused due to the limited resolution of A/D converter, the sampling rate of sensor must be less than or equal to A/D converter switching rate etc.For overcoming above-mentioned defect, the utility model proposes the temperature sensor circuit structure connected based on single line, comprise the temperature sensor be connected with single-chip microcomputer, wherein, single-chip microcomputer carries out the control module of temperature signal collection for controlling temperature sensor, temperature sensor is digital temperature sensor, it can directly change into digital quantity by the detected temperatures value and be delivered to single-chip microcomputer, overcome in prior art, communicating by letter and need change the pattern that could realize by A/D between temperature sensor and single-chip microcomputer, there is circuit structure simple, the advantages such as precision height.
Single-chip microcomputer, digital temperature sensor all are connected with power supply, circuit structure as shown in Figure 1, digital temperature sensor comprises 1 pin be connected with power cathode, 2 pins that are connected with positive source and 3 pins that are connected with single-chip microcomputer, 3 pins are connected with single-chip microcomputer by data line, data line can be used unibus: the I/O line, on the single-chip microcomputer pin, definition has serial line interface RD, and 3 pins are connected on serial line interface RD by the I/O line.During use, the temperature data of digital temperature sensor collection carries out data communication by the I/O line with mode and the serial line interface RD of serial communication, and the signal detected is sent to single-chip microcomputer.In the actual fabrication process, digital temperature sensor can adopt DS18B20, this device is made in semiconductor Thermosensor, A/D converter, storer etc. on a very little integrated circuit (IC) chip, integrated level is high, direct output temperature signal digital value, and the signal transmission adopts I/O line structure (that is: unibus), as: the I/O line that adopts two cores or triple cable to be made, use an I/O line to realize, effectively simplified the circuit structure of peripheral hardware, be convenient to encapsulation.When making, digital temperature sensor can adopt 3 pin encapsulation, and pin is produced on para tape and from the encapsulation both sides and draws, and utilizes automatic band to carry the encapsulation of welding (TAB) technology, and profile is very thin.
In actual application, the quantity of temperature acquisition point is usually more, in the utility model, digital temperature sensor can connect as shown in Figure 2, that is: can articulate several digital temperature sensors on an I/O line, each sensor has unique geocoding, and single-chip microcomputer is by the addressing to device, just can read the temperature value of some sensors, thereby simplify the circuit structure of whole signal acquiring system.
The utility model is simple in structure, reasonable in design, adopts digital temperature sensor to replace traditional temperature sensor, has avoided the drawback of using A/D converter to be connected with single-chip microcomputer, has integrated level high, and the peripheral hardware circuit is simple, the precision high.
The above; it is only preferred embodiment of the present utility model; not the utility model is done to any pro forma restriction, any simple modification, equivalent variations that every foundation technical spirit of the present utility model is done above embodiment, within all falling into protection domain of the present utility model.
Claims (5)
1. the temperature sensor circuit structure connected based on single line, it is characterized in that: comprise the temperature sensor be connected with single-chip microcomputer, described single-chip microcomputer carries out the control module of temperature signal collection for controlling temperature sensor, described temperature sensor is for directly changing into the detected temperatures value digital temperature sensor of digital quantity, and described single-chip microcomputer, temperature sensor all are connected with power supply.
2. the temperature sensor circuit structure connected based on single line according to claim 1, it is characterized in that: described temperature sensor comprises 1 pin be connected with power cathode, 2 pins that are connected with positive source and 3 pins that are connected with single-chip microcomputer, and described 3 pins are connected with single-chip microcomputer by data line.
3. the temperature sensor circuit structure connected based on single line according to claim 2, it is characterized in that: described 3 pins are connected with single-chip microcomputer by the I/O line.
4. the temperature sensor circuit structure connected based on single line according to claim 3, it is characterized in that: on described single-chip microcomputer pin, definition has serial line interface RD, and described 3 pins are connected on serial line interface RD by the I/O line.
5. the temperature sensor circuit structure connected based on single line according to claim 4, it is characterized in that: described temperature sensor adopts 3 pin encapsulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220558906 CN202956210U (en) | 2012-10-29 | 2012-10-29 | Temperature sensor circuit structure based on single wire connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220558906 CN202956210U (en) | 2012-10-29 | 2012-10-29 | Temperature sensor circuit structure based on single wire connection |
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| Publication Number | Publication Date |
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| CN202956210U true CN202956210U (en) | 2013-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220558906 Expired - Fee Related CN202956210U (en) | 2012-10-29 | 2012-10-29 | Temperature sensor circuit structure based on single wire connection |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106940226A (en) * | 2017-05-15 | 2017-07-11 | 上海安誉智能科技有限公司 | Temperature sensor line based on temperature element |
| CN106969850A (en) * | 2017-05-15 | 2017-07-21 | 上海安誉智能科技有限公司 | The temperature sensing cable and its application and method of temperature sensor line based on output PWM ripples |
| CN106969852A (en) * | 2017-05-15 | 2017-07-21 | 上海安誉智能科技有限公司 | Export temperature sensor line circuit structure, system for detecting temperature and its method for PWM ripples |
-
2012
- 2012-10-29 CN CN 201220558906 patent/CN202956210U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106940226A (en) * | 2017-05-15 | 2017-07-11 | 上海安誉智能科技有限公司 | Temperature sensor line based on temperature element |
| CN106969850A (en) * | 2017-05-15 | 2017-07-21 | 上海安誉智能科技有限公司 | The temperature sensing cable and its application and method of temperature sensor line based on output PWM ripples |
| CN106969852A (en) * | 2017-05-15 | 2017-07-21 | 上海安誉智能科技有限公司 | Export temperature sensor line circuit structure, system for detecting temperature and its method for PWM ripples |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20130529 Termination date: 20131029 |