CN109547022A - A kind of acquisition range is wide and temperature collection circuit with high accuracy and method - Google Patents
A kind of acquisition range is wide and temperature collection circuit with high accuracy and method Download PDFInfo
- Publication number
- CN109547022A CN109547022A CN201811286063.2A CN201811286063A CN109547022A CN 109547022 A CN109547022 A CN 109547022A CN 201811286063 A CN201811286063 A CN 201811286063A CN 109547022 A CN109547022 A CN 109547022A
- Authority
- CN
- China
- Prior art keywords
- module
- processing circuit
- built
- sampling processing
- resistance
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/124—Sampling or signal conditioning arrangements specially adapted for A/D converters
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
Temperature collection circuit wide and with high accuracy and method the invention discloses a kind of acquisition range, temperature collection circuit includes display module, acquisition module, the one-chip computer module of built-in A/D module, power supply VCC, a kind of acquisition range is wide and the method for temperature collection circuit with high accuracy, comprises the following specific steps that: step 1: starting；Step 2: temperature collection circuit initialization；Step 3: the one-chip computer module of built-in A/D module starts to sample；Step 4: the one-chip computer module of built-in A/D module obtains register value by acquiring the other end of thermistor R5；Step 5: the numerical value of sampling is shown in display module, is otherwise exited, and the present invention carries out temperature acquisition using two path sample technologies, and sample circuit is divided into two grades, acquires high-temperature all the way；Low temperature is acquired all the way, carries out AD sampling respectively, the range that the two acquires is combined, and not only expands temperature collection range, but also temperature acquisition precision is high.
Description
Technical field
Temperature collection circuit wide and with high accuracy and method the present invention relates to a kind of acquisition range.
Background technique
Data acquisition technology is the important branch of single chip application technology, it is well known that AD sample range and Chip Microcomputer A/D
Sampling precision is inseparable, and Chip Microcomputer A/D sampling precision determines the range of AD acquisition, and Chip Microcomputer A/D sampling precision is not high, acquires model
It encloses with significant ASIC limitation, the data of acquisition can not accurately be shown, be fallen flat.
Summary of the invention
The purpose of the present invention is overcoming the shortcomings of in existing product, provide that a kind of acquisition range is wide and temperature with high accuracy is adopted
Collector and method.
In order to achieve the above object, the present invention is achieved by the following technical solutions:
A kind of acquisition range is wide and temperature collection circuit with high accuracy, including display module, acquisition module, built-in A/D module
One-chip computer module, power supply VCC, the display module, acquisition module are all connect with the one-chip computer module of built-in A/D module, described
Acquisition module includes the first sampling processing circuit, the second sampling processing circuit, sensor module, the first sampling processing electricity
Road, the second sampling processing circuit are all connect with sensor module, and one-chip computer module, the acquisition module of the built-in A/D module all connect
Meet power supply VCC.
Sensor module includes thermistor R5, capacitor C4, and one end of the thermistor R5, one end of capacitor C4 all connect
The other end of the other end connection capacitor C4 of ground signalling GND, the thermistor R5, the other end of the thermistor R5 connect
The one-chip computer module of built-in A/D module is connect, first sampling processing circuit includes resistance R4, triode BJT2, resistance R2, institute
State the other end of one end connection thermistor R5 of resistance R4, the transmitting of the other end connecting triode BJT2 of the resistance R4
Pole, the collector of the triode BJT2 connect power supply VCC, and the base stage of the triode BJT2 passes through AD built in resistance R2 connection
The one-chip computer module of module, second sampling processing circuit include resistance R1, triode BJT1, resistance R3, the resistance R3
One end connects the other end of thermistor R5, the emitter of the resistance R3 other end connecting triode BJT1, the triode
The collector of BJT1 connects power supply VCC, the single-chip microcontroller that the base stage of the triode BJT1 passes through A/D module built in resistance R1 connection
Module.
Display module is charactron.
Capacitor C4 is 0.1uF.
Triode BJT2, triode BJT1 are PNP triode.
Preferably, resistance R4, resistance R2, resistance R1 are 5.1K Ω, the resistance R3 is 200 Ω.
Preferably, power supply VCC is 5V.
A kind of acquisition range is wide and the method for temperature collection circuit with high accuracy, comprises the following specific steps that:
Step 1: starting；
Step 2: temperature collection circuit initialization；
Step 3: the one-chip computer module of built-in A/D module starts to sample；
Step 4: the one-chip computer module of built-in A/D module obtains register value by acquiring the other end of thermistor R5；
Step 5: the sample range of the first sampling processing circuit is -30-120 DEG C, the sampling model of the second sampling processing circuit
Enclosing is 120-300 DEG C, and the one-chip computer module of built-in A/D module judges whether register value belongs to adopting for the first sampling processing circuit
Sample range, if register value belongs to the sample range of the first sampling processing circuit, the one-chip computer module acquisition of built-in A/D module
The numerical value of first sampling processing circuit, and the numerical value of the first sampling processing circuit is shown in display module, it is otherwise built-in
The one-chip computer module of A/D module judges whether register value belongs to the sample range of the second sampling processing circuit, if register value is
Belong to the sample range of the second sampling processing circuit, then the one-chip computer module of built-in A/D module acquires the second sampling processing circuit
Numerical value, and the numerical value of the second sampling processing circuit is shown in display module, otherwise exit.
Beneficial effects of the present invention are as follows: the present invention carries out temperature acquisition using two path sample technologies, sample circuit
It is divided into two grades, acquires high-temperature all the way；Low temperature is acquired all the way, carries out AD sampling respectively, and the range that the two acquires is combined,
Temperature collection range is not only expanded, but also temperature acquisition precision is high.
Detailed description of the invention
Fig. 1 is system block diagram of the invention；
Fig. 2 is circuit diagram of the invention.
Technical solution of the present invention is described further with reference to the accompanying drawings of the specification:
As shown in Figure 1 and Figure 2, a kind of acquisition range is wide and temperature collection circuit with high accuracy, including display module 2, acquisition
Module 1, the one-chip computer module 3 of built-in A/D module, power supply VCC, display module 2 are charactron, show that module 2 is the U2 in Fig. 2, institute
It states display module 2, acquisition module 1 all to connect with the one-chip computer module 3 of built-in A/D module, the acquisition module 1 is adopted including first
Sample processing circuit 11, the second sampling processing circuit 12, sensor module 13, first sampling processing circuit 11, second sample
Processing circuit 12 is all connect with sensor module 13, and one-chip computer module 3, the acquisition module 1 of the built-in A/D module all connect electricity
Source VCC.The one-chip computer module 3 of built-in A/D module is the U1 in Fig. 2, and sensor module 13 includes thermistor R5, capacitor C4, institute
One end of one end, capacitor C4 for stating thermistor R5 all connects earth signal GND, and the other end of the thermistor R5 connects capacitor
The other end of C4, the other end of the thermistor R5 connect the one-chip computer module 3 of built-in A/D module, first sampling processing
Circuit 11 includes the other end of one end connection thermistor R5 of resistance R4, triode BJT2, resistance R2, the resistance R4, institute
The emitter of the other end connecting triode BJT2 of resistance R4 is stated, the collector of the triode BJT2 connects power supply VCC, described
One-chip computer module 3 of the base stage of triode BJT2 by A/D module built in resistance R2 connection, second sampling processing circuit 12
Including resistance R1, triode BJT1, resistance R3, the one end the resistance R3 connects the other end of thermistor R5, the resistance R3
The collector of the emitter of other end connecting triode BJT1, the triode BJT1 connects power supply VCC, the triode BJT1
The base stage one-chip computer module 3 that passes through the built-in A/D module of resistance R1 connection.Capacitor C4 is 0.1uF.Triode BJT2, triode
BJT1 is PNP triode.Resistance R4, resistance R2, resistance R1 are 5.1K Ω, and the resistance R3 is 200 Ω.Power supply VCC is
5V。
The model MS83F1602S of the one-chip computer module 3 of built-in A/D module.
A kind of acquisition range is wide and the method for temperature collection circuit with high accuracy, comprises the following specific steps that:
Step 1: starting；
Step 2: temperature collection circuit initialization；
Step 3: the one-chip computer module 3 of built-in A/D module starts to sample；
Step 4: the one-chip computer module 3 of built-in A/D module obtains register value by acquiring the other end of thermistor R5；
Step 5: the sample range of the first sampling processing circuit 11 is -30-120 DEG C, and the second sampling processing circuit 12 is adopted
Sample range is 120-300 DEG C, and the one-chip computer module 3 of built-in A/D module judges whether register value belongs to the first sampling processing circuit
11 sample range, if register value belongs to the sample range of the first sampling processing circuit 11, the single-chip microcontroller of built-in A/D module
Module 3 acquires the numerical value of the first sampling processing circuit 11, and the numerical value of the first sampling processing circuit 11 is shown in display module 2
Out, otherwise the one-chip computer module 3 of built-in A/D module judges whether register value belongs to the sampling of the second sampling processing circuit 12
Range, if register value is the sample range for belonging to the second sampling processing circuit 12, the one-chip computer module 3 of built-in A/D module is adopted
Collect the numerical value of the second sampling processing circuit 12, and the numerical value of the second sampling processing circuit 12 is shown in display module 2, it is no
Then exit.
1, the temperature AD method of sampling
As shown in Figure 1 and Figure 2, including use triode BJT2, triode BJT1 in parallel, a triode ON, in addition one
A triode cut-off, a circuit is channel status always.Two-way samples divider resistance difference, and sampling precision is different.Sampling
The sample range that circuit is divided into two grades: first sampling processing circuits 11 is -30-120 DEG C, the sampling of the second sampling processing circuit 12
Range is 120-300 DEG C, is sampled respectively, two sample ranges are combined, by the range (0- of sample temperature all the way originally
150 degrees Celsius), two-way sample range is expanded as, the sample range of this patent is -30-300 degrees Celsius, expands temperature collection
Range, and temperature acquisition precision is high.
2, mentality of designing
Existing sample circuit is sampled since thermistor changes greatly (0-37k) using 10K resistance, minimum 7 Europe
Nurse jump is primary, and sampling resolution will reach 0.0007, and Chip Microcomputer A/D sampling precision is inadequate, and sampling resolution is not achieved so smart
Really.Therefore temperature acquisition is carried out using two path sample technologies, sample circuit is divided into two grades and is sampled, the first sampling processing
The sample range of circuit 11 is -30-120 DEG C, and the sample range of the second sampling processing circuit 12 is 120-300 DEG C, when more than 120
Degree Celsius when, the first sampling processing circuit 11 close；Second sampling processing circuit 12 is opened, and the second sampling processing circuit 12 is adopted
Sample range is 120-300 DEG C, according to thermosensitive resistance, shows accurate temperature.Two-way acquisition range combines, and realizes single-chip microcontroller
The function that AD sampling expands temperature collection range and accurately shows.
The present invention carries out temperature acquisition using two path sample technologies, and sample circuit is divided into two grades, acquires high temperature all the way
Degree；Low temperature is acquired all the way, carries out AD sampling respectively, and the range that the two acquires is combined, temperature collection model is not only expanded
It encloses, and temperature acquisition precision is high.
It should be noted that listed above is only a kind of specific embodiment of the invention.It is clear that the invention is not restricted to
Upper embodiment, can also be there are many deforming, in short, those skilled in the art can directly lead from present disclosure
Out or all deformations for associating, it is considered as protection scope of the present invention.
Claims (8)
1. a kind of acquisition range is wide and temperature collection circuit with high accuracy, which is characterized in that including display module (2), acquisition mould
Block (1), the one-chip computer module (3) of built-in A/D module, power supply VCC, the display module (2), acquisition module (1) all with built-in AD
The one-chip computer module (3) of module connects, and the acquisition module (1) includes the first sampling processing circuit (11), the second sampling processing
Circuit (12), sensor module (13), first sampling processing circuit (11), the second sampling processing circuit (12) all with sensing
Device module (13) connection, one-chip computer module (3), the acquisition module (1) of the built-in A/D module all connect power supply VCC.
2. a kind of acquisition range is wide according to claim 1 and temperature collection circuit with high accuracy, which is characterized in that the biography
Sensor module (13) include thermistor R5, one end of capacitor C4, the thermistor R5, capacitor C4 one end all connect ground letter
The other end of the other end connection capacitor C4 of number GND, the thermistor R5, built in the other end connection of the thermistor R5
The one-chip computer module (3) of A/D module, first sampling processing circuit (11) include resistance R4, triode BJT2, resistance R2, institute
State the other end of one end connection thermistor R5 of resistance R4, the transmitting of the other end connecting triode BJT2 of the resistance R4
Pole, the collector of the triode BJT2 connect power supply VCC, and the base stage of the triode BJT2 passes through AD built in resistance R2 connection
The one-chip computer module (3) of module, second sampling processing circuit (12) include resistance R1, triode BJT1, resistance R3, described
The one end resistance R3 connects the other end of thermistor R5, and the emitter of the resistance R3 other end connecting triode BJT1 is described
The collector of triode BJT1 connects power supply VCC, and the base stage of the triode BJT1 passes through A/D module built in resistance R1 connection
One-chip computer module (3).
3. a kind of acquisition range is wide according to claim 1 and temperature collection circuit with high accuracy, which is characterized in that described aobvious
Show that module (2) are charactron.
4. a kind of acquisition range is wide according to claim 2 and temperature collection circuit with high accuracy, which is characterized in that the electricity
Appearance C4 is 0.1uF.
5. a kind of acquisition range is wide according to claim 2 and temperature collection circuit with high accuracy, which is characterized in that described three
Pole pipe BJT2, triode BJT1 are PNP triode.
6. a kind of acquisition range is wide according to claim 2 and temperature collection circuit with high accuracy, which is characterized in that the electricity
Hindering R4, resistance R2, resistance R1 is all 5.1K Ω, and the resistance R3 is 200 Ω.
7. a kind of acquisition range is wide according to claim 2 and temperature collection circuit with high accuracy, which is characterized in that the electricity
Source VCC is 5V.
8. a kind of method of temperature collection circuit wide and with high accuracy based on acquisition range described in claim 1, which is characterized in that
It comprises the following specific steps that:
Step 1: starting；
Step 2: temperature collection circuit initialization；
Step 3: the one-chip computer module (3) of built-in A/D module starts to sample；
Step 4: the one-chip computer module (3) of built-in A/D module obtains register value by acquiring the other end of thermistor R5；
Step 5: the sample range of the first sampling processing circuit (11) is -30-120 DEG C, and the second sampling processing circuit (12) are adopted
Sample range is 120-300 DEG C, and the one-chip computer module (3) of built-in A/D module judges whether register value belongs to the first sampling processing electricity
The sample range on road (11), if register value belongs to the sample range of the first sampling processing circuit (11), built-in A/D module
One-chip computer module (3) acquires the numerical value of the first sampling processing circuit (11), and the numerical value of the first sampling processing circuit (11) is existed
Display module (2) shows that otherwise the one-chip computer module (3) of built-in A/D module judges whether register value belongs to the second sampling
The sample range of processing circuit (12), it is built-in if register value is the sample range for belonging to the second sampling processing circuit (12)
The numerical value of one-chip computer module (3) acquisition the second sampling processing circuit (12) of A/D module, and by the second sampling processing circuit (12)
Numerical value shown in display module (2), otherwise exit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811286063.2A CN109547022A (en) | 2018-10-31 | 2018-10-31 | A kind of acquisition range is wide and temperature collection circuit with high accuracy and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811286063.2A CN109547022A (en) | 2018-10-31 | 2018-10-31 | A kind of acquisition range is wide and temperature collection circuit with high accuracy and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109547022A true CN109547022A (en) | 2019-03-29 |
Family
ID=65846077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811286063.2A Withdrawn CN109547022A (en) | 2018-10-31 | 2018-10-31 | A kind of acquisition range is wide and temperature collection circuit with high accuracy and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109547022A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102045920A (en) * | 2010-08-25 | 2011-05-04 | 李志明 | System for intelligently controlling energy efficiency of LED lighting source |
| CN103776554A (en) * | 2012-10-17 | 2014-05-07 | 成都龙冠科技实业有限公司 | Temperature data acquisition device |
| CN203811291U (en) * | 2014-04-22 | 2014-09-03 | 马鞍山市安工大工业技术研究院有限公司 | High precision temperature measuring apparatus consuming low energy |
| CN104949713A (en) * | 2015-06-30 | 2015-09-30 | 成都众山科技有限公司 | Temperature and humidity measurement system with real-time data displaying capacity |
| CN206847815U (en) * | 2017-06-27 | 2018-01-05 | 佛山市顺德区美的电热电器制造有限公司 | It is segmented temperature measuring equipment and cooking appliance |
| US20180085070A1 (en) * | 2015-03-27 | 2018-03-29 | Nokia Technologies Oy | Method and apparatus for detecting body-related temperature changes |
| CN207439567U (en) * | 2017-11-20 | 2018-06-01 | 宁波第二技师学院 | Intelligent temperature acquisition system |
| US20180164163A1 (en) * | 2016-12-12 | 2018-06-14 | Invecas, Inc. | Temperature Sensing for Integrated Circuits |
| CN108254099A (en) * | 2017-12-29 | 2018-07-06 | 惠州市德赛西威汽车电子股份有限公司 | A kind of temperature sensing circuit of thermistor |
-
2018
- 2018-10-31 CN CN201811286063.2A patent/CN109547022A/en not_active Withdrawn
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102045920A (en) * | 2010-08-25 | 2011-05-04 | 李志明 | System for intelligently controlling energy efficiency of LED lighting source |
| CN103776554A (en) * | 2012-10-17 | 2014-05-07 | 成都龙冠科技实业有限公司 | Temperature data acquisition device |
| CN203811291U (en) * | 2014-04-22 | 2014-09-03 | 马鞍山市安工大工业技术研究院有限公司 | High precision temperature measuring apparatus consuming low energy |
| US20180085070A1 (en) * | 2015-03-27 | 2018-03-29 | Nokia Technologies Oy | Method and apparatus for detecting body-related temperature changes |
| CN104949713A (en) * | 2015-06-30 | 2015-09-30 | 成都众山科技有限公司 | Temperature and humidity measurement system with real-time data displaying capacity |
| US20180164163A1 (en) * | 2016-12-12 | 2018-06-14 | Invecas, Inc. | Temperature Sensing for Integrated Circuits |
| CN206847815U (en) * | 2017-06-27 | 2018-01-05 | 佛山市顺德区美的电热电器制造有限公司 | It is segmented temperature measuring equipment and cooking appliance |
| CN207439567U (en) * | 2017-11-20 | 2018-06-01 | 宁波第二技师学院 | Intelligent temperature acquisition system |
| CN108254099A (en) * | 2017-12-29 | 2018-07-06 | 惠州市德赛西威汽车电子股份有限公司 | A kind of temperature sensing circuit of thermistor |
Non-Patent Citations (2)
| Title |
|---|
| YA-XIAO WANG: "The Development of Infrared Temperature Sensor Based on Thermopile Detector TPS334 and PGA309", 《 2009 INTERNATIONAL CONFERENCE ON MEASURING TECHNOLOGY AND MECHATRONICS AUTOMATION》, 18 August 2009 (2009-08-18), pages 1 - 4 * |
| 卢燕: "基于DSP的某激光器温度控制系统设计与研究", 《中国优秀博硕士学位论文全文数据库(硕士)信息科技辑》, no. 10, 15 October 2018 (2018-10-15), pages 140 - 282 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209446181U (en) | Digital temperature sensor circuit with long-range and local temp sensing function | |
| CN104391250A (en) | Electric vehicle battery mobile phone monitoring system | |
| CN105790763A (en) | Six-channel analog to digital conversion module based on PC104 bus | |
| CN209673705U (en) | A kind of micro- water density data acquisition circuit of double thermistors | |
| CN201653572U (en) | Temperature acquisition device | |
| CN104897169B (en) | A kind of dynamic accuracy test system and method for Miniature posture module | |
| CN109547022A (en) | A kind of acquisition range is wide and temperature collection circuit with high accuracy and method | |
| CN203179279U (en) | Remote transparent data acquisition and transmission system based on optical fiber | |
| CN203772429U (en) | Single-bus temperature monitoring device | |
| CN209043432U (en) | A kind of Ultrasonic water meter calibrating installation based on infrared communication | |
| CN106761692B (en) | Temperature measuring method of pressure sensor | |
| CN104061886B (en) | Data collecting and processing method used for digital display measuring tool | |
| Jevtic et al. | Development of smart transducers compliant with the IEEE 1451.4 standard | |
| CN104452555B (en) | The pavement disease detection synchronous acquisition system of high-precision signal and synchronous collection method thereof | |
| Subair et al. | Intelligent pressure measuring system | |
| CN203642965U (en) | Multi-interface temperature and humidity data collector | |
| CN211181045U (en) | Wisdom agricultural is with multi-functional temperature and humidity sensor | |
| CN102829805A (en) | U-disk sensor and detector | |
| CN204215195U (en) | Multiple analog quantity sensor data acquisition system (DAS) | |
| CN203414978U (en) | Active wireless temperature and humidity label | |
| CN208026588U (en) | ZigBee Campus Wireless LAN environment monitoring devices based on solar energy | |
| CN205365638U (en) | Signal intelligent acquisition ware | |
| CN219319586U (en) | Control circuit of infrared temperature measurement and automatic positioning device | |
| CN109359010A (en) | Obtain the method and system of memory module internal transmission delay | |
| Huiyan et al. | System Design of Wireless Meteorological Element Acquisition Based on Loongson 2K1000 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190329 |
|
| WW01 | Invention patent application withdrawn after publication |