CN205719323U - A kind of multipoint temperature measuring circuit of electronic equipment - Google Patents
A kind of multipoint temperature measuring circuit of electronic equipment Download PDFInfo
- Publication number
- CN205719323U CN205719323U CN201620216923.5U CN201620216923U CN205719323U CN 205719323 U CN205719323 U CN 205719323U CN 201620216923 U CN201620216923 U CN 201620216923U CN 205719323 U CN205719323 U CN 205719323U
- Authority
- CN
- China
- Prior art keywords
- temperature coefficient
- negative temperature
- resistance
- coefficient thermistor
- single pole
- 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
Links
Abstract
The utility model discloses the multipoint temperature measuring circuit of a kind of electronic equipment, including more than one negative temperature coefficient thermistor, single pole multiple throw, resistance, the number of switches of described single pole multiple throw is identical with the quantity of negative temperature coefficient thermistor；One end of each negative temperature coefficient thermistor is connected with a wherein throw switch of single pole multiple throw, and the other end of all negative temperature coefficient thermistors is commonly connected together；The common pole that switchs of single pole multiple throw is connected with one end of resistance.This utility model circuit arrangement is simple, it is easy to accomplish, cost is relatively low, can be widely applied in the various electronic product needing and measuring multi-point temp.
Description
Technical field
This utility model relates to the measuring circuit field of electronic product, refers more particularly to a kind of electronics and sets
Standby multipoint temperature measuring circuit.
Background technology
In electron trade, electronic product it is frequently necessary to detect temperature, needs in some products
The temperature of detection has multiple spot, such as power lithium-ion battery etc., in industry relatively frequently with way be
Use special multiple temperature sensors or temperature survey chip or thermocouple, it is achieved the side of getting up
Case relatively costly, circuit is the most complex.
Existing technology is to use special multiple temperature sensors or multiple temperature survey chip
Or multiple thermocouple carries out temperature survey, it is achieved scheme of getting up relatively costly, circuit is the most relatively
For complexity.
Utility model content
The purpose of this utility model is to overcome above-mentioned weak point of the prior art to provide one
Plant the multipoint temperature measuring circuit of the electronic equipment of simple in construction, low cost.
This utility model realizes in the following way:
A kind of multipoint temperature measuring circuit of electronic equipment, it is characterised in that: include more than one
Negative temperature coefficient thermistor 1, single pole multiple throw 2, resistance 3, described single pole multiple throw
The number of switches of 2 is identical with the quantity of negative temperature coefficient thermistor 1；Each negative temperature coefficient
One end of thermal resistor 1 is connected with a wherein throw switch of single pole multiple throw 2；All negative
The other end of temperature coefficient thermistor device 1 is commonly connected together；Opening of single pole multiple throw 2
Close common pole to be connected with one end of resistance 3.
The beneficial effects of the utility model are: have employed cheap negative temperature coefficient thermis device
And single pole multiple throw, circuit arrangement is simple, it is easy to accomplish, cost is relatively low, the temperature that can measure
Degree is counted unrestricted, within temperature measurement accuracy after calibration can reach 2 DEG C, is a kind of
The multipoint temperature measuring method of high performance-price ratio, can be widely applied to various need to enter multi-point temp
In the electronic product that row is measured.
Accompanying drawing explanation
Fig. 1 this utility model structural representation.
Detailed description of the invention
In conjunction with accompanying drawing in detail, this utility model detailed description of the invention is described in detail:
As it is shown in figure 1, the multipoint temperature measuring circuit of a kind of electronic equipment, including more than one
Negative temperature coefficient thermistor 1, single pole multiple throw 2, resistance 3, single pole multiple throw 2
Number of switches identical with the quantity of negative temperature coefficient thermistor 1；Each negative temperature coefficient heat
One end of sensitive resistor 1 is connected with a wherein throw switch of single pole multiple throw 2；All subzero temperatures
The other end of degree coefficient thermal resistor 1 is commonly connected together；The switch of single pole multiple throw 2
Common pole is connected with one end of resistance 3.
During as it is shown in figure 1, use, by the other end of all negative temperature coefficient thermistors 1 altogether
With linking together, and and the earth potential of single-chip microcomputer 4 be connected together；The other end of resistance 3 and list
The I/O port of sheet machine 4 is connected.When electronic equipment being carried out certain some temperature survey, hilted broadsword is many
Throw switch 2 forwards this negative temperature coefficient thermistor 1 corresponding to measurement point to and is connected with resistance 3,
The I/O port of single-chip microcomputer 4 exports high level to resistance 3, at this moment the I/O port of single-chip microcomputer 4, resistance 3,
Tested negative temperature coefficient thermistor 1 and single-chip microcomputer 4 can form loop, and single-chip microcomputer 4 is by right
The voltage of A/D mouth is AD converted produced value conversion and obtains negative temperature coefficient thermistor 1
Resistance, and calculate the temperature value corresponding to negative temperature coefficient thermistor 1.Hilted broadsword is many
Throw switch 2 switches over, and makes negative temperature coefficient thermistor 1 to be measured with resistance 3 even
Connect, and after the A/D mouth of single-chip microcomputer 4 is carried out A/D conversion, it is possible to obtain tested negative temperature system
Number temperature value corresponding to thermal resistor 1.
Single pole multiple throw 2 in this utility model can replace with electronic switch chip, electronic cutting
The gating closing chip channel can be controlled by single-chip microcomputer 4.
The thermal resistor 1 of negative temperature coefficient resistance when variations in temperature can change, single-chip microcomputer
Resistance 3 and the negative temperature coefficient thermistor 1 connected with resistance 3 thereof are powered by the I/O port of 4,
When the temperature is changed, owing to the resistance of negative temperature coefficient thermistor 1 can change, resistance
The 3 voltage values connected with negative temperature coefficient thermistor 1 also can change, single-chip microcomputer
4 by measuring the voltage at resistance 3 and negative temperature coefficient thermistor 1 series connection node,
The resistance value of negative temperature coefficient thermistor 1 can be obtained, then temperature can be obtained through conversion
Value.Single pole multiple throw 2 plays the access effect switching multiple negative temperature coefficient thermistors 1,
Making single-chip microcomputer 4 have only to an A/D mouth just can be to multiple negative temperature coefficient thermistor 1
Resistance measures.
This utility model uses multiple negative temperature coefficient thermistors 1, negative temperature coefficient thermistor power
The impedance magnitude of resistance device 1 and temperature value are the relation of negative correlation, by multiple negative temperature coefficient thermistor powers
Resistance device 1 is connected with single pole multiple throw 2 or electronic analog swtich chip, is controlled by single-chip microcomputer 4
Electronic analog swtich chip processed gates each negative temperature coefficient thermistor 1 successively and accesses monolithic
Machine 4 carries out A/D conversion and measures its resistance, through single-chip microcomputer 4 internal arithmetic thus obtain multiple spot
Temperature value, this circuit is simple, and cost is the lowest, certainty of measurement after calibration can reach 2 DEG C with
In.
Claims (1)
1. the multipoint temperature measuring circuit of an electronic equipment, it is characterised in that: include more than one
Negative temperature coefficient thermistor (1), single pole multiple throw (2), resistance (3), described hilted broadsword
The number of switches of multithrow switch (2) is identical with the quantity of negative temperature coefficient thermistor (1)；
Wherein the one of one end of each negative temperature coefficient thermistor (1) and single pole multiple throw (2)
Throw switch is connected；The other end of all negative temperature coefficient thermistors (1) is commonly connected to
Together；The common pole of switch of single pole multiple throw (2) is connected with one end of resistance (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620216923.5U CN205719323U (en) | 2016-03-21 | 2016-03-21 | A kind of multipoint temperature measuring circuit of electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620216923.5U CN205719323U (en) | 2016-03-21 | 2016-03-21 | A kind of multipoint temperature measuring circuit of electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205719323U true CN205719323U (en) | 2016-11-23 |
Family
ID=57313624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620216923.5U Expired - Fee Related CN205719323U (en) | 2016-03-21 | 2016-03-21 | A kind of multipoint temperature measuring circuit of electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205719323U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115390599A (en) * | 2022-08-17 | 2022-11-25 | 中国航空工业集团公司北京长城计量测试技术研究所 | Multi-point temperature control system applied to standard photoelectric pyrometer |
-
2016
- 2016-03-21 CN CN201620216923.5U patent/CN205719323U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115390599A (en) * | 2022-08-17 | 2022-11-25 | 中国航空工业集团公司北京长城计量测试技术研究所 | Multi-point temperature control system applied to standard photoelectric pyrometer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109043675B (en) | Electric heating non-combustible smoking set and temperature control device thereof | |
| CN107941363B (en) | Temperature pick-up device and method based on program-controlled double constant-current supplies | |
| CN104062025B (en) | A kind of energy-conservation automatic AD temperature acquisition monitoring system | |
| CN106932447B (en) | A kind of compound modification method of cultivation matrix water content conductivity | |
| CN205719323U (en) | A kind of multipoint temperature measuring circuit of electronic equipment | |
| CN105157866B (en) | Measuring circuit | |
| CN110132428A (en) | MEMS sensor thermal parameters test circuit and test method | |
| CN211086505U (en) | Reliability state detection device for IGBT in power electronic transformer substation | |
| CN206228335U (en) | A kind of ear temperature meter with heating function | |
| CN204188299U (en) | Multichannel IGBT inner NTC high temperature real-time detection circuit | |
| CN110108380A (en) | A kind of precise temperature measurement system applied to biphenyl heater box in weaving elasticizer | |
| CN203616013U (en) | One-point-calibrating temperature measuring system | |
| CN204214569U (en) | Based on the temperature sensing circuit of transformer isolation | |
| CN104330186A (en) | Temperature detection circuit based on transformer isolation | |
| CN204269733U (en) | Metallic resistance rate change proving installation within the scope of a kind of continuous temperature | |
| CN104006903A (en) | Method for detecting temperature sensor on engine inlet port | |
| CN205691645U (en) | A kind of signal detection system | |
| CN201628559U (en) | Multi-parameter intelligent wireless sensor | |
| CN2927147Y (en) | Diode temperature compensator | |
| CN205229861U (en) | Temperature control system that transformer oil chromatographic monitoring device was held on spot | |
| CN211785914U (en) | MOSFET internal resistance detection circuit | |
| CN113866392A (en) | Soil multi-parameter measuring system and measuring method thereof | |
| CN209055244U (en) | A kind of circuit and its temperature measurement circuit for simulating thermistor | |
| CN103823116A (en) | Self-checking type precision battery internal resistance instrument | |
| CN205483302U (en) | Low -power consumption temperature sensing system |
Legal Events
| 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: 20161123 |