CN205375086U - Multi -path temperature detection system - Google Patents
Multi -path temperature detection system Download PDFInfo
- Publication number
- CN205375086U CN205375086U CN201620003861.XU CN201620003861U CN205375086U CN 205375086 U CN205375086 U CN 205375086U CN 201620003861 U CN201620003861 U CN 201620003861U CN 205375086 U CN205375086 U CN 205375086U
- Authority
- CN
- China
- Prior art keywords
- converter
- dsp chip
- temperature
- voltage
- measurement system
- 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 a multi -path temperature detection system, including the measuring unit in the object that awaits measuring, 5 pt100, the temperature transmitter, signal conversion amplifying unit, step -down limit circuit, DSP chip - the next machine, the AD converter of DSP on chip, the treater of DSP on chip, USB interface, the PC demonstration - host computer in the temperature transmitter, 5 pt100 carry out the temperature measurement to the object that awaits measuring, 5 pt100's resistance value with temperature changes and changing, measuring unit in the temperature transmitter converts the resistance value that 5 pt100 change to magnitude of voltage, the signal conversion amplifying unit of magnitude of voltage in temperature transmitter to the output of 5 PT100 ends enlargies, establish step -down limit circuit between signal conversion amplifying unit and AD converter, the AD converter of DSP on chip is inputed to magnitude of voltage after the step -down is shifted, the AD converter changes the voltage signal of reality into data signal, the treater of DSP on chip is discerned data signal and is handled with filtering, the numerical value that converts and correspond with the temperature, it shows to convey PC through the USB interface.
Description
Technical field
This utility model relates to macro work, agricultural temperature detection technical field, is specifically related to a kind of multi-channel temperature measurement system.
Background technology
In macro work, agricultural temperature detection technical field, major part temperature detection is using single-chip microcomputer as core on the market, the occasion that data volume is little, requirement of real-time is general can be met, but, for the occasion that detection quantity of information is bigger, for instance multi-channel temperature measurement, ability of data processing and real-time are had higher requirement, accordingly, it would be desirable to adopt the chip that data process and operational capability is higher.
nullThe display aspect of temperature detection value，Many designs use LCD LCD MODULE，Multi way temperature value is shown，Usually adopt poll、The method of time delay，But，Real-time is had considerable influence by this，It is desirable to adopt the visualization output of PC Display Realization collection result，Virtual instrument technique LabVIEW is good selection，The method Based PC shows，The man machine interface of close friend can be developed as required，Show while disclosure satisfy that multi way temperature value,But，Temperature signal collection part and slave computer and PC show needs communication between part and host computer，The exploitation of communications portion is typically complex，Also someone adopts the DAQ data collecting card that American National instrument NI company provides，This capture card has been internally integrated the signal procedure with LabVIEW，But it is expensive，In order to meet the current industrial or agricultural requirement to temperature acquisition Yu control，Temperature acquisition controls system must to microminiaturization、Intelligent、Digitized、Networking、The directions such as hommization are developed，Traditional acquisition controlling mode is generally adopted unit control model，And accuracy of data acquisition is not high，Adopt bound that temperature is controlled，The precision controlled is not high yet，Remotely monitor and control can not be taked，Dumb series of problems of Denging is installed.
Guo Dong proposes a system schema in " the measurement and control system based on USB and LabVIEW designs ", adopt STMicw Electronics (ST) company based on the STM32 series microprocessor of Contex-M3 kernel, design multiple signals modulate circuit and sensor circuit, achieve collection converter, real-time transmission data, the functions such as real-time control measurement and control system, USB interface can be passed through shown to PC by real-time data transmission, and it is able to receive that PC control order, system is capable of light intensity, pressure, temperature, the analog acquisitions such as voltage, and can realize controlling function simultaneously.In the scheme that Guo Dong proposes, have the disadvantage that: one, the STM32 series microprocessor used only has been responsible for the collection of signal, and system shows and data processing section, even includes the transmission of acquisition, all complete at PC display end so that whole system can not work independently by divorced from computer；Two, when mass data enters PC display end, to show at PC and upper computer software LabVIEW arranges circular buffer district, in this process, need rationally to arrange buffer size, should prevent the data cover that the data not yet read newly are arrived from falling, avoid program to read relief area overlong time again.So, have impact on the real-time of system to a certain extent, add design complexities.For above this situation, developing a temperature acquisition control system novel, that be suitable for current needs has the meaning of reality.
Summary of the invention
For the problems referred to above, this utility model aims to provide a kind of multi-channel temperature measurement system, this detection system is based on a kind of multi-channel temperature measurement system of dsp chip and Virtual instrument LabVIEW, and this detection system mainly has good application in macro work temperature detection technical field.
nullFor realizing this technical purpose，Scheme of the present utility model is: a kind of multi-channel temperature measurement system，Including object to be measured、5 Pt100、Measuring unit in temperature transmitter、Signal conversion amplifying unit in temperature transmitter、Blood pressure lowering amplitude limiter circuit、Dsp chip slave computer、A/D converter in dsp chip、Processor in dsp chip、USB interface、PC shows host computer，Object to be measured is carried out thermometric by 5 Pt100，The resistance value of 5 Pt100 varies with temperature and changes，Measuring unit in described temperature transmitter converts the resistance value that 5 Pt100 change to magnitude of voltage，The magnitude of voltage that 5 PT100 ends are exported signal conversion amplifying unit in temperature transmitter amplifies，Change at signal and set blood pressure lowering amplitude limiter circuit between amplifying unit and A/D converter，Magnitude of voltage after blood pressure lowering displacement is input to the A/D converter in dsp chip，Actual voltage signal is changed into digital signal by A/D converter，Digital signal is identified and Filtering Processing by the processor in described dsp chip，It is converted into the numerical value corresponding with temperature，It is sent to PC through USB interface to show.
As preferably, described dsp chip selects the TMS320F2812 of TI company of Texas Instrument, also referred to as digital signal processor, is a kind of microprocessor being particularly suitable for carrying out Digital Signal Processing computing.
As preferably, described PC display adopts Virtual instrument LabVIEW to be programmed, LabVIEW is a kind of programming development environment, developed by American National instrument NI company, be considered data acquisition and the instrument control software of a standard, realize PC by the VISA control of LabVIEW and show and the communication function of USB device, PC shows as host computer, develop application interface with LabVIEW, it is achieved collection result visualization output, and store detection data.
As preferably, the A/D converter in described dsp chip is the A/D converter that dsp chip carries.
As preferably, for improving dsp chip sequential operation speed, the IQmath function library selecting TI company of Texas Instrument to provide, the computing relating to real-coded GA is converted to integer data computing.
This utility model compared with the existing technology has the advantage that
One, dsp chip has in data-handling capacity and program execution speed is the advantage that can not compare of single-chip microcomputer, dsp chip is utilized to make core processor, by improving signal sampling frequency and sequential operation speed, it is ensured that the rapidity of system for detecting temperature, real-time.
Two, simple to operate, friendly in the PC display end LabVIEW man machine interface write, with the addition of time attribute to each data, each temperature value of object to be measured all corresponding time, it is simple to data analysis is called by the later stage.
Three, USB interface technology is utilized, realize the processor in dsp chip divide with PC display part between communicate, save cost, PC shows that in software LabVIEW, the senior application programming interface VISA control of application integration realizes the communication between USB, the complexity of Developing USB Driver before avoiding completely, substantially reduce the construction cycle, additionally, data are only displayed and store by LabVIEW, it is not necessary to arrange data buffer area size.
Four, dsp chip is not only responsible for the collection of multi way temperature signal, and carries out data process, so can depart from the PC control shown, independent operating completely.
Accompanying drawing explanation
Fig. 1 is block diagram of the present utility model.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, this utility model is described in further details.
nullAs shown in Figure 1，A kind of multi-channel temperature measurement system of this utility model embodiment，Detect for 5 temperature spots simultaneously，Temperature range is 0-150 DEG C，Temperature sensor adopts the Pt100 of three-wire system,Including object to be measured、5 Pt100、Measuring unit in temperature transmitter、Signal conversion amplifying unit in temperature transmitter、Blood pressure lowering amplitude limiter circuit、Dsp chip slave computer、A/D converter in dsp chip、Processor in dsp chip、USB interface、PC shows host computer，Object to be measured is carried out thermometric by 5 Pt100，The resistance value of 5 Pt100 varies with temperature and changes，Measuring unit in described temperature transmitter converts the resistance value that 5 Pt100 change to magnitude of voltage，The magnitude of voltage that 5 PT100 ends are exported signal conversion amplifying unit in temperature transmitter amplifies，Change at signal and set blood pressure lowering amplitude limiter circuit between amplifying unit and A/D converter，Magnitude of voltage after blood pressure lowering displacement is input to the A/D converter in dsp chip，It is be 0-3V owing to dsp chip carries the input voltage range of A/D converter sample port，If the voltage of input sample mouth is less than 0.5V，Not easily it is identified，If the voltage of input sample mouth is more than 3V，Dsp chip can be damaged，Surplus should be left in actual applications，Typically enter maximum at about the 70% of 3V，So，Blood pressure lowering amplitude limiter circuit is set between temperature transmitter and dsp chip，The 0-5V voltage that temperature transmitter exports is carried out blood pressure lowering displacement，Making the voltage range delivering to A/D converter is 1-2V，Actual voltage signal is changed into digital signal by A/D converter，Digital signal is identified and Filtering Processing by the processor in described dsp chip，It is converted into the numerical value corresponding with temperature，It is sent to PC through USB interface to show.
The above; it is only preferred embodiment of the present utility model; not in order to limit this utility model; every any trickle amendment, equivalent replacement and improvement above example made according to technical spirit of the present utility model; should be included within the protection domain of technical solutions of the utility model, this utility model is not directed to part all same as the prior art maybe can adopt existing techniques in realizing.
Claims (5)
- null1. a multi-channel temperature measurement system，A kind of multi-channel temperature measurement system，Including object to be measured、5 Pt100、Measuring unit in temperature transmitter、Signal conversion amplifying unit in temperature transmitter、Blood pressure lowering amplitude limiter circuit、Dsp chip slave computer、A/D converter in dsp chip、Processor in dsp chip、USB interface、PC shows host computer，It is characterized in that，Object to be measured is carried out thermometric by described 5 Pt100，The resistance value of 5 Pt100 varies with temperature and changes，Measuring unit in described temperature transmitter converts the resistance value that 5 Pt100 change to magnitude of voltage，The magnitude of voltage that 5 PT100 ends are exported signal conversion amplifying unit in temperature transmitter amplifies，Change at signal and set blood pressure lowering amplitude limiter circuit between amplifying unit and A/D converter，Magnitude of voltage after blood pressure lowering displacement is input to the A/D converter in dsp chip，Actual voltage signal is changed into digital signal by A/D converter，Digital signal is identified and Filtering Processing by the processor in described dsp chip，It is converted into the numerical value corresponding with temperature，It is sent to PC through USB interface to show.
- 2. multi-channel temperature measurement system according to claim 1, is characterized in that, described dsp chip selects the TMS320F2812 of TI company of Texas Instrument.
- 3. multi-channel temperature measurement system according to claim 1, is characterized in that, described PC display adopts Virtual instrument LabVIEW to be programmed.
- 4. multi-channel temperature measurement system according to claim 1, is characterized in that, the A/D converter in described dsp chip is the A/D converter that dsp chip carries.
- 5. multi-channel temperature measurement system according to claim 1, is characterized in that, described multi-channel temperature measurement system selects the IQmath function library that TI company of Texas Instrument provides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620003861.XU CN205375086U (en) | 2016-01-03 | 2016-01-03 | Multi -path temperature detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620003861.XU CN205375086U (en) | 2016-01-03 | 2016-01-03 | Multi -path temperature detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205375086U true CN205375086U (en) | 2016-07-06 |
Family
ID=56276038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620003861.XU Expired - Fee Related CN205375086U (en) | 2016-01-03 | 2016-01-03 | Multi -path temperature detection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205375086U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599858A (en) * | 2018-04-23 | 2018-09-28 | 重庆市智权之路科技有限公司 | The conversion that intelligence obtains big data information decodes system |
| CN108742545A (en) * | 2018-05-23 | 2018-11-06 | 周欣荣 | A kind of real-time ocular temperature-detecting device of contact |
| CN111486983A (en) * | 2020-05-08 | 2020-08-04 | 中国南方电网有限责任公司超高压输电公司天生桥局 | High-precision temperature measuring circuit with compensation function |
-
2016
- 2016-01-03 CN CN201620003861.XU patent/CN205375086U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599858A (en) * | 2018-04-23 | 2018-09-28 | 重庆市智权之路科技有限公司 | The conversion that intelligence obtains big data information decodes system |
| CN108742545A (en) * | 2018-05-23 | 2018-11-06 | 周欣荣 | A kind of real-time ocular temperature-detecting device of contact |
| CN111486983A (en) * | 2020-05-08 | 2020-08-04 | 中国南方电网有限责任公司超高压输电公司天生桥局 | High-precision temperature measuring circuit with compensation function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205375086U (en) | Multi -path temperature detection system | |
| CN202119789U (en) | Rotating speed measuring sensor of asynchronous motor | |
| CN109782667A (en) | Pressure testing system and method, computer equipment and readable storage medium storing program for executing | |
| CN203949716U (en) | A kind of digital weighing sensor | |
| CN105466587A (en) | Multichannel temperature acquisition system based on K-type thermocouple and MAX6675s | |
| CN108507591A (en) | Multichannel MEMS gyroscope demarcates test data collection device and acquisition method | |
| CN102538904A (en) | HART (Highway Addressable Remote Transducer)-communication-based capacitive level transmitter and working method thereof | |
| CN206192340U (en) | Portable inclination measuring equipment | |
| CN202420737U (en) | Ship stern shaft power test signal acquisition device with remote data transmission function | |
| CN100423039C (en) | Integral automatic integrating testing system | |
| CN202886003U (en) | Intelligent multichannel temperature collection instrument | |
| CN105318856A (en) | A touch screen-based angle sensor display device | |
| CN202916037U (en) | Capacitance pressure transmitter and pressure sensing system | |
| CN104359394A (en) | High-precision digital angle measurer | |
| CN209625008U (en) | A kind of pressure testing system | |
| CN203720588U (en) | Signal acquisition device | |
| CN202205078U (en) | Multi-channel data acquisition equipment | |
| CN202026297U (en) | Intelligent expansion interface of double-pulse signal generator | |
| CN109186816A (en) | A kind of microminiature digital pressure sensor | |
| CN205748767U (en) | A kind of pump entrance end pressure-measuring instrument controls device | |
| CN205066813U (en) | Integrated form data acquisition system | |
| CN203217755U (en) | System for collecting crop growing environment data | |
| CN104166039B (en) | Based on visual permanent-magnetic synchronous motor stator current detecting system and method | |
| CN204255522U (en) | A kind of preventing poor contact circuit of temperature signal transmission | |
| CN203759113U (en) | Transformer load acquisition device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160718 Address after: 010051 No. 2, unit 33, family building, Inner Mongolia University of Technology, the Inner Mongolia Autonomous Region, Hohhot 601 Patentee after: Wang Lin Patentee after: Wang Shaojie Address before: 010080 the Inner Mongolia Autonomous Region Hohhot Jinchuan Development Zone Inner Mongolia University of Technology Jinchuan campus student apartment 417 Patentee before: Wang Shaojie |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160706 Termination date: 20180103 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |