CN202195893U - Multipoint thermodetector - Google Patents
Multipoint thermodetector Download PDFInfo
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- CN202195893U CN202195893U CN2011202669229U CN201120266922U CN202195893U CN 202195893 U CN202195893 U CN 202195893U CN 2011202669229 U CN2011202669229 U CN 2011202669229U CN 201120266922 U CN201120266922 U CN 201120266922U CN 202195893 U CN202195893 U CN 202195893U
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- temperature sensor
- digital temperature
- digital
- thermodetector
- multipoint
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Abstract
The utility model belongs to a field of thermodetectors and discloses a multipoint thermodetector. The multipoint thermodetector includes a digital temperature sensor test board and digital temperature sensor daughter boards. The number of the digital temperature sensor daughter boards is smaller than 12. The digital temperature sensor test board connects with the digital temperature sensor daughter boards together in series. The digital temperature sensor test board includes a single-chip microprocessor processing module and a drive module. The drive module is arranged between the single-chip microprocessor processing module and the digital temperature sensor daughter boards. A single-chip microprocessor is provided with an I/O interface connecting with the drive module and capable of controlling the sending and receiving of signals. The single-chip microprocessor is also provided with an I/O interface connecting with the drive module and used for reading data of the digital temperature sensor, and an I/O interface connecting with the drive module and used for reading an address of the digital temperature sensor. The utility model aims to provide a multipoint thermodetector having a low cost. The multipoint thermodetector can read multiple temperatures in a single series connection. The digital value output is convenient for processing. The transmission range is long. And the multipoint thermodetector can be connected simply and conveniently.
Description
Technical field
The utility model relates to the temperature measurer field, relates in particular to a kind of multi-point temperature measurement appearance.
Background technology
Thermometric instruments has been widely used in modern industrial or agricultural, is used to temperature of monitoring by critical facility or the like.Be applied to temperature detection instrument on the market at present, be divided into two types: thermocouple temperature measurement, thermal resistance thermometric.
1, thermocouple temperature measurement
Thermopair is that one of the most frequently used detector unit is gone up in industry
The principle of work of thermopair: with the conductor of two kinds of different materials or semiconductor with weld, constitute a closed-loop path.When conductor and two persistent points between when having the temperature difference, just produce electromotive force between the two, thereby in the loop, form the electric current of a size, this phenomenon is called thermoelectric effect.Thermopair utilizes this effect to come work.
Relative merits: advantage is that the thermocouple measurement scope is wide, measures but-50 ~+1600 ℃ of equal limits are continuous, and special thermopair is minimum measures-269 ℃ (like golden iron nickel chromium triangles) for some, reaches as high as+2800 ℃.Simple structure, easy to use.Thermopair normally is made up of two kinds of different metallic silks, and does not receive the restriction of size and beginning.Shortcoming: thermocouple material is more valuable, need use compensating wire during long transmission distance.And cannot connect simultaneously and read a plurality of temperature, circuit is more when reading multi-point temp respectively, installs inconvenient.
2, thermal resistance thermometric
Thermal resistance is the most frequently used a kind of Temperature Detector of middle low-temperature space.
The thermal resistance temperature-measurement principle: the resistance value that the thermal resistance thermometric is based on metallic conductor increases this characteristic with the increase of temperature and carries out thermometric.Thermal resistance is mostly processed by the simple metal material, and using maximum at present is platinum and copper, in addition, has begun to adopt made thermal resistances such as pasture, nickel, manganese and rhodium now.The variation of resistance value can be measured through bridge diagram.
Relative merits: long service life, good mechanical property can bending be convenient to install.Shortcoming: thermal resistance be to process by the simple metal material, cost is high.And it is measured is to read temperature according to the variation of resistance value, because connecting line has also influenced the precision of measuring.And cannot connect and read a plurality of temperature simultaneously, it is more complicated to read circuit respectively.
Summary of the invention
In order to solve the problems of the technologies described above, the utility model provide a kind of cost low, can connect and read simultaneously that a plurality of temperature, digital quantity output are convenient to handle, transmission range is long, connect multi-point temperature measurement appearance simply and easily.
The complete skill scheme of the utility model is: a kind of multi-point temperature measurement appearance; Comprise a digital temperature sensor test board and digital temperature sensor daughter board; The number of said digital temperature sensor daughter board is smaller or equal to 12, and said digital temperature sensor test board and each digital temperature sensor daughter board are cascaded; Said digital temperature sensor test board comprises single chip processing module and driver module, and said drive module setting is between said single chip processing module and digital temperature sensor daughter board; Said single-chip microcomputer is provided with the I/O interface of the may command receiving and transmitting signal that is connected with driver module, also is provided with I/O interface that reads the digital temperature sensor data that is connected with driver module and the I/O interface that reads the digital temperature sensor address on the said single-chip microcomputer.
Said digital temperature sensor is the DS18B20 digital temperature sensor.
Transmission line between said digital temperature sensor test board and daughter board is a netting twine.
Each daughter board series connection total length of said digital temperature sensor is smaller or equal to 50m.
Therefore the utility model has following beneficial effect:
A plurality of digital sensor daughter boards are together in series each other in the utility model, and cost is low, simple in structure, easy for installation, can read a plurality of temperature simultaneously; Transceive data control section branch is arranged, and the data transmission that makes is more accurate; Also be provided with driver module, transmission line is a netting twine, and the transmission range of the data that make is longer, and is more stable.
Description of drawings
Accompanying drawing described herein is used to provide the further understanding to the utility model, constitutes the application's a part, does not constitute the improper qualification to the utility model, in the accompanying drawings:
Fig. 1 is the single-chip microcomputer processing of the utility model multi-point temperature measurement instrument circuit and the circuit diagram of communication part;
Fig. 2 is the circuit diagram of the utility model temperature measurer drive part;
Fig. 3 is digital temperature sensor daughter board circuit theory diagrams.
Embodiment
To combine accompanying drawing and specific embodiment to specify the utility model below, be used for explaining the utility model in the illustrative examples and the explanation of this utility model, but not as the qualification to the utility model.
Embodiment 1:
A kind of multi-point temperature measurement appearance of present embodiment comprises a DS18B20 digital temperature sensor test board; N DS18B20 digital temperature sensor daughter board; It is fixed that N comes according to on-the-spot needs, and ≤12, the total length of the DS18B20 digital temperature sensor daughter board that is together in series is not more than 50m to N; Then DS18B20 digital temperature sensor daughter board that connects and test board are connected on the computing machine, the data line between each element is a netting twine, because netting twine is a twisted-pair feeder, can make transmission range farther; The principle of work of DS18B20 digital temperature sensor test board is: shown in Figure 1 is the single-chip microcomputer processing and the communication part of this temperature measurer circuit.MAX813L is resetting of single-chip microcomputer; AT24C16 is the storage chip of single-chip microcomputer; The P1.7 of single-chip microcomputer is the control end EN of 74LS245 transmitting-receiving in the control chart 2, controls transmitting-receiving with EN, has just avoided a few I/O mouths of monolithic (for example P1.6) directly to receive and dispatch the peak voltage that produces when switching.P1.6 is the I/O mouth that reads the DS18B20 data, and this port strengthens driving force through 74LS245, makes the signal that transmits far also can read.P1.5 is the I/O mouth that reads the DS18B20 address.DS18B20 distinguishes the position of series connection in the test point through home address.The DS18B20 of each use records its home address in advance on J3, be together in series and receive on the J2.Handle through single-chip microcomputer data that read and address, is transferred to computer through communication part, is convenient to observed data.
Shown in Figure 2 is the drive part of this temperature measurer circuit, the transmission range of DS18B20, and transmission quantity and quality are all relevant with this part with data.With the data port that 74LS245 keeps apart single-chip microcomputer and DS18B20, the sequential of misoperation influence back circuit when avoiding the transmitting-receiving of single-chip microcomputer GPIO mouth to switch.When being when sending out state, data make data transmission farther more accurate through 74LS245 enhancing driving force.When being the receipts state, the driving of single-chip microcomputer can influence circuit, and at this moment 74LS245 plays buffer action, avoids the height of single-chip microcomputer to drive the influence to collecting mail number.
Shown in Figure 3 is DS18B20 thermometric daughter board schematic diagram, constitutes simply, i.e. two netting twine interfaces and a DS18B20 digital temperature sensor.
Therefore the advantage of the utility model is that cost is low, can connect and read simultaneously that a plurality of temperature, digital quantity output are convenient to handle, transmission range is long, it is simple and convenient to connect.Certainly have the temperature measuring device that utilizes DS18B20 on the market.What the utility model was different with it is; Solved and driven deficiency; Transmitting-receiving control makes that separately data transmission is accurate; Replace plain conductor to connect with the netting twine network interface simultaneously,, can make transmission range farther because netting twine is a twisted-pair feeder.This utility model needing to be mainly used in the many places of point for measuring temperature.
More than technical scheme that the utility model embodiment is provided carried out detailed introduction; Used concrete example among this paper principle and the embodiment of the utility model embodiment are set forth, the explanation of above embodiment only is applicable to the principle that helps to understand the utility model embodiment; Simultaneously, for one of ordinary skill in the art, according to the utility model embodiment, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as the restriction to the utility model.
Claims (4)
1. multi-point temperature measurement appearance; It is characterized in that; Comprise a digital temperature sensor test board and digital temperature sensor daughter board; The number of said digital temperature sensor daughter board is smaller or equal to 12, and said digital temperature sensor test board and each digital temperature sensor daughter board are cascaded; Said digital temperature sensor test board comprises single chip processing module and driver module, and said drive module setting is between said single chip processing module and digital temperature sensor daughter board; Said single-chip microcomputer is provided with the I/O interface of the may command receiving and transmitting signal that is connected with driver module, also is provided with I/O interface that reads the digital temperature sensor data that is connected with driver module and the I/O interface that reads the digital temperature sensor address on the said single-chip microcomputer.
2. a kind of multi-point temperature measurement appearance according to claim 1 is characterized in that said digital temperature sensor is the DS18B20 digital temperature sensor.
3. a kind of multi-point temperature measurement appearance according to claim 1 is characterized in that the transmission line between said digital temperature sensor test board and daughter board is a netting twine.
4. a kind of multi-point temperature measurement appearance according to claim 1 is characterized in that, each daughter board series connection total length of said digital temperature sensor is smaller or equal to 50m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202669229U CN202195893U (en) | 2011-07-26 | 2011-07-26 | Multipoint thermodetector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202669229U CN202195893U (en) | 2011-07-26 | 2011-07-26 | Multipoint thermodetector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202195893U true CN202195893U (en) | 2012-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202669229U Expired - Lifetime CN202195893U (en) | 2011-07-26 | 2011-07-26 | Multipoint thermodetector |
Country Status (1)
| Country | Link |
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| CN (1) | CN202195893U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103017921A (en) * | 2012-10-24 | 2013-04-03 | 北京信息科技大学 | Networked multipoint temperature monitoring system and method for performing data communication between upper computer and same |
| CN105823567A (en) * | 2016-04-28 | 2016-08-03 | 河南二纺机股份有限公司 | Portable digital spindle itinerant temperature measurement instrument |
-
2011
- 2011-07-26 CN CN2011202669229U patent/CN202195893U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103017921A (en) * | 2012-10-24 | 2013-04-03 | 北京信息科技大学 | Networked multipoint temperature monitoring system and method for performing data communication between upper computer and same |
| CN105823567A (en) * | 2016-04-28 | 2016-08-03 | 河南二纺机股份有限公司 | Portable digital spindle itinerant temperature measurement instrument |
| CN105823567B (en) * | 2016-04-28 | 2023-05-30 | 河南二纺机股份有限公司 | Portable digital spindle itinerant thermometer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Xuanwu District of Nanjing City, Jiangsu province 210000 Houzaimen Buddha Bridge No. 37 Patentee after: Jiangsu Yaao Technology Co., Ltd. Address before: Xuanwu District of Nanjing City, Jiangsu province 210000 Houzaimen Buddha Bridge No. 37 Patentee before: Jiangsu Yaao Technology Co., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20120418 |
|
| CX01 | Expiry of patent term |