CN202101765U - Temperature transmitter for real-time wireless communication industrial thermocouple - Google Patents
Temperature transmitter for real-time wireless communication industrial thermocouple Download PDFInfo
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- CN202101765U CN202101765U CN2011201611343U CN201120161134U CN202101765U CN 202101765 U CN202101765 U CN 202101765U CN 2011201611343 U CN2011201611343 U CN 2011201611343U CN 201120161134 U CN201120161134 U CN 201120161134U CN 202101765 U CN202101765 U CN 202101765U
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Abstract
The utility model discloses a temperature transmitter for a real-time wireless communication industrial thermocouple. The temperature transmitter comprises a four-way casing, a K-type thermocouple, a WIAPA-M1800 wireless adapter, a main controller circuit board, a display, a 3.3V power supply and a WIA gateway, wherein two relatively larger opening parts of the casing are provided with the display and connected with the power supply, the WIAPA-M1800 wireless adapter and the main controller circuit board are arranged in the casing, two relatively small opening parts of the casing are provided with the thermocouple and a wireless antenna, a temperature sensor is connected with a circuit board provided with the WIAPA-M1800 wireless adapter via signal wires and then connected with the main controller circuit board via a pin, and the display is connected with the main controller circuit board via a pin. The temperature transmitter is directed at information wireless communication between devices, is especially suitable for being used in a severe industrial site environment, and has the technical characteristics of high anti-interference capability, ultralow power dissipation, real-time communication, and the like.
Description
Technical field
The novel temperature transmitter that relates to of this reality is specifically related to a kind of real-time radio telecommunications industry thermocouple temperature transmitter.
Background technology
Temperature is one of parameter common and the most basic in the commercial production, and the people's the life and the temperature of environment are closely bound up, often needs in process of production temperature is detected in real time and monitors.In agricultural production, also be unable to do without the measurement of temperature, measuring method and the device of therefore studying temperature have great importance.The key of measuring temperature is a temperature sensor, and three developing stage have been experienced in the development of temperature sensor: 1. traditional discrete temperature sensor, 2. simulate integrated temperature sensor, 3. intelligent integrated temperature sensor.At present, novel in the world temperature sensor just from analog to digital, from integrated to intelligent, networked direction develop rapidly.
70～eighties of last century, the wireless industrial technology still is a kind of simple means of communication, is purpose as the additional of cable technology with the data transmission that solves long distance, can realize point-to-point, point-to-multipoint delivery.In order to realize ubiquitous perception, promote the industrial measurement and control mode for reforming beginning of this century, and the information that solves is cheaply obtained, and the wireless industrial technology begins to realize large scale networkization.
At industrial circle, with respect to cable network, wireless sensor network has numerous advantages such as low cost, dirigibility, movability, and this provides the feasibility of technical support and realization to those occasions that do not suit line.But at industrial circle, the application of wireless sensor network still is in the starting stage, and the principal element of restriction wireless sensor network comprises energy consumption, real-time and security etc.
Summary of the invention
The novel purpose of this reality is: a kind of real-time radio telecommunications industry thermocouple temperature transmitter is provided; On the basis of satisfying commercial measurement scope and accuracy requirement; Be can be according to the wireless temperature acquisition instrument of different model sensor in real time adjustment parameter; This instrument is according to the temperature-measurement principle of active differential voltage temperature sensor; Binding signal modulate circuit and high-precision adc spare, the accurate collecting temperature data of mode that the sensor of downloading from long-range host computer through the WIA network divides kilsyth basalt to table look-up with software, and data in real time uploaded; Utilize the power consumption control characteristic and the peripheral analog switching circuit of microcontroller self simultaneously, make whole instrument that energy consumption performance preferably arranged.
The novel technical solution of this reality is: this temperature transmitter comprises four-way shell, K type thermopair, WIAPA-M1800 wireless adapter, main controller circuit plate, display, 3.3V power supply, WIA gateway; Two big opening parts at shell are installed display and are connected power supply; Portion's Installation of W IAPA-M1800 wireless adapter and main controller circuit plate in the enclosure; Thermopair and wireless antenna are installed by two smaller opening places at shell; Temperature sensor is connected on the circuit board at WIAPA-M1800 wireless adapter place through signal wire, is connected to the main controller circuit plate by contact pin again, and display is connected to the main controller circuit plate through contact pin; Its circuit connects as follows:
Power supply: the 3.3V lithium battery power supply, use 3.3V to change 3V gate-controlled switch chip and to analog part and numerical portion required power supply be provided in the main controller circuit plate;
K type thermopair: thermopair is carried out the temperature that point for measuring temperature is gathered in voltage stabilizing, behind amplifying circuit and impedance matching circuit, be sent to A/D, output to controller after converting digital signal into;
16 A/D: the ADS1110 chip of selecting the texas,U.S electric corporation for use; Adopt the interface of I2C form; Because the low-noise programmable instrument amplifier of built-in 1 one 8 gains can carry out processing and amplifying to the voltage signal that comes amplifying circuit and sampling is converted into digital signal;
MCU: choosing is handled the digital signal of A/D output; Computation of table lookup goes out temperature, communicates by letter with long-range PC through wireless module, receives the temperature calibration parameter list; The result who collects is uploaded PC and other real-time Communication for Power, through the switching of mode of operation being carried out energy consumption control;
Signal conditioning circuit: the millivolt level signal to the thermopair collection amplifies, filtering, impedance matching;
Eeprom memory: because the output voltage of thermopair and the relation of temperature are non-linear, so use the EEPROM storage electric thermo-couple temperature of 64K to divide kilsyth basalt;
Display: show the temperature of the point for measuring temperature that thermopair is gathered and the temperature under the current environment of instrument place, 0.25 ℃ of measuring accuracy;
Radio communication: the data of collection send to the WIAPA-M1800 wireless communication module through serial ports; Insert the WIAPA-GW1498 radio network gateway again; On long-range PC, data are shown; To be sent to MCU through this wireless module corresponding to the branch kilsyth basalt of each sensor probe by PC when using for the first time in system simultaneously, be kept in the external memory storage.
Wherein, WIAPA-M1800 wireless adapter and master controller all use MSP430 model single-chip microcomputer, carry out communication through serial ports between the two; Display adopts the liquid-crystalline glasses material of 128 sections, and master controller drives it through HT1621.
The novel measuring method of this reality is: this instrument is installed at the point for measuring temperature place of commercial unit, and Installation of W IA gateway in the WIA network coverage, and link to each other with host computer through RS232 serial ports or Ethernet.
During work; The branch kilsyth basalt that host computer is corresponding with temperature sensor passes through the WIA network download to instrument; Master controller will divide kilsyth basalt to be saved in the chip external memory on the circuit board, the temperature at the direct contact measurement point for measuring temperature of thermopair place, by the signal conditioning circuit of circuit board to the voltage signal that sensor produces amplify, impedance matching, denoising handle; A/D converts analog voltage signal into digital signal; Master controller divides the data in the kilsyth basalt to carry out match query digital signal and chip external memory, has obtained temperature value accurately, and data in real time is uploaded.
The novel volume of this reality is little, in light weight, sensor can be integrated with transmitter, and is visual good, real-time, easy to install.Modulus conversion chip adopts 16 A, can make calibration number for the gamma correction acquisition precision of K type thermopair more than 0.1 grade.Data processing controller, communication controler adopt 16 MSP430 microprocessors of high-performance super low-power consumption.Signal conditioning circuit on the combined circuit plate, mu balanced circuit, anti-jamming circuit and on-off circuit are that whole instrument has lower power consumption and advantages of higher stability.
This reality is novel to have the following advantages:
1, thermocouple temperature transmitter is field erected temperature transmitter unit in the industrial instrument; Wherein the collecting sensor signal circuit is connected to amplifying circuit, impedance matching circuit and filtering circuit; With the millivolt level signal transformation of thermopair output be D the collectable normal voltage signal of device; Transmitter meets IEEE 802.15.4 wireless communication standard based on intelligent wireless network WIA technical system, the radio communication of information between main equipment oriented; Be particularly suitable for using, have technical characterictics such as very strong antijamming capability, super low-power consumption, real-time Communication for Power at abominable industry spot environment.
2, according to temperature parameter common in the commercial Application; Adopt the design of K type thermopair; The wireless temperature change of realization wide range, low-power consumption is sent, and this temperature transmitter can right-50 ℃～900 ℃ temperature range be measured, 0.25 ℃ of measuring accuracy; Through changing temperature-sensing element, can adjust the measurement range of transmitter.
3, should be with the intelligent wireless network WIA technology that relates to based on short-distance wireless communication IEEE 802.15.4 standard; Use meets the free frequency band of Chinese the Radio Management Commission regulation; The various large-scale apparatus that spreads all under the solution rugged surroundings, metallic conduit etc. are to the reflection of wireless signal, the multipath effect that scattering causes; And produce the interference of electromagnetic noise during the running of motor, apparatus to radio communication, highly reliable, the real-time radio communication service that can satisfy application demand are provided.
4, through using intelligent wireless network WIA technology; The user can realize full-range " ubiquitous perception " with lower investment and cost; Obtain tradition owing to the cost reason can't on-line monitoring the significant process parameter; And implement optimal control based on this, reach the target of improving the quality of products and saving energy and reduce the cost.
Description of drawings
Fig. 1 is the novel structural representation of this reality.
Fig. 2 is controller and the peripheral circuit principle schematic thereof of Fig. 1.
Fig. 3 is the data acquisition circuit principle schematic of Fig. 1.
Fig. 4 is radio communication and the power consumption control interface principle figure of Fig. 1.
Among the figure: 1, antenna, 2, LCD, 3, thermocouple probe, 4, shell.
Embodiment
Further specify the novel technical solution of this reality below in conjunction with accompanying drawing and embodiment, embodiment should not be construed as the restriction to technical solution.
Shown in Fig. 1-4; This temperature transmitter comprises four-way shell, K type thermopair, WIAPA-M1800 wireless adapter, main controller circuit plate, display, 3.3V power supply, WIA gateway; Two big opening parts at shell are installed display and are connected power supply; Portion's Installation of W IAPA-M1800 wireless adapter and main controller circuit plate in the enclosure, thermopairs and wireless antenna are installed by two smaller opening places at shell, and temperature sensor is connected on the circuit board at WIAPA-M1800 wireless adapter place through signal wire; Be connected to the main controller circuit plate by contact pin again, display is connected to the main controller circuit plate through contact pin; Its circuit connects as follows:
Power supply: 3.3V lithium battery power supply; Use 3.3V to change 3V gate-controlled switch chip in the main controller circuit plate and required power supply is provided analog part and numerical portion; 3.3V power supply is by C3, C14, C15, C16, C20, C21, C22, C24 filtering, the 3V power supply is by C1, C9, C10, C18 filtering;
K type thermopair: the output plus terminal of thermopair is divided into two-way, and wherein one road positive pole links to each other with No. 3 pins of 2 voltage stabilizing chips with negative pole, and another road is anodal to link to each other with another voltage stabilizing chip through R13.No. 2 pins of voltage stabilizing chip connect the 3V power supply, No. 1 pin ground connection;
16 A/D: the ADS1110 chip of selecting the texas,U.S electric corporation for use; Adopt the interface of I2C form; 1 pin of ADS1110 is connected with the output terminal of the second operational amplifier OP2; 3 pin of ADS1110,4 pin link to each other with the end of pull-up resistor R37, R38, and 5 pin of the other end of R7, R8 and ADS1110 are connected 2 pin of ADS1110 and 6 pin ground connection with+3.3V power supply;
MCU: select the MSP430F149 chip of texas,U.S electric corporation for use, crystal oscillator is selected 3.6264MHz for use, and program is downloaded use standard jtag interface; XT2IN, XT2OUT are connected with crystal oscillator; Between connect resistance R 17, to ground, 54,55,56,57 pin of MCU link to each other with 1,3,5,7 pin of double cab JP2 respectively through C11, C12; 12 of MCU links to each other with 6 pin with 2 pin of JP2 respectively with 22 pin, and 58 pin of MCU link to each other with 11 pin of JP2;
Signal conditioning circuit: the positive pole of thermopair is connected with the end of filter resistance R31; The other end of R31 is connected with the end of filter capacitor C31, the end of filter resistance R32 respectively; The other end of R2 is connected with the in-phase input end of the first operational amplifier OP1; The inverting input of OP1 is connected with the end of feedback resistance R33, the end of R34, the end of feedback capacity C32 respectively; The other end of R34 is connected with the other end of C32, the output terminal of OP1, the end of filter resistance R35 respectively; The other end of R35 is connected with the end of filter capacitor C33, the in-phase input end of the second operational amplifier OP2 respectively; The inverting input of OP2 is connected with the end of feedback resistance R36, the end of feedback capacity C34 respectively, the other end of R36 respectively with the other end of C34, the output of OP2 is short to be connected; The negative power end ground connection of the other end of the other end of the other end of the negative pole of thermopair, filter capacitor C31, feedback resistance R33, filter capacitor C33, operational amplifier, the positive power source terminal of operational amplifier is connected with+3.3V power supply;
Eeprom memory: sheet external memory chip is selected the 24LC64 chip of MicroChip company for use; Adopt the I2C interface; Supply power by the 3.3V power supply; 5, No. 6 pins link to each other with P4.5, the P4.6 mouth of MCU through R20, R21 pull-up resistor, and C25 is used for filtering, and 1,2,3, No. 4 pin ground connection is used for indicant reason address.
Display: select for use 48 pin HT1621B of spi bus structure to drive LCD screen; Wherein SEG0～SEG23 and COM0～COM3 totally 24 pins be connected with liquid-crystalline glasses; The DATA pin connects an end that draws resistance R 52 and is connected with the P5.1 mouth of MCU; The CS pin connects an end that draws resistance R 53 and is connected with the P1.5 mouth of MCU, and the WR pin connects an end that draws resistance R 54 and is connected with the P1.6 mouth of MCU, and the RD pin connects an end that draws resistance R 55 and is connected with the P1.7 mouth of MCU; The other end of pull-up resistor R52, R53, R54, R55 is connected with VDD; Be connected the R51 variable resistor between VDD and the VLCD pin, VDD is connected with ground wire respectively at the 3.3V power supply on the main controller circuit plate with VSS, and all the other pins are unsettled;
The P3.4 of radio communication: MCU, P3.5 mouth link to each other with the serial interface of WIAPA-M1800 wireless communication module.
Claims (2)
1. real-time radio telecommunications industry thermocouple temperature transmitter; It is characterized in that: this temperature transmitter comprises four-way shell, K type thermopair, WIAPA-M1800 wireless adapter, main controller circuit plate, display, 3.3V power supply, WIA gateway; Two big opening parts at shell are installed display and are connected power supply; Portion's Installation of W IAPA-M1800 wireless adapter and main controller circuit plate in the enclosure; Thermopair and wireless antenna are installed by two smaller opening places at shell; Temperature sensor is connected on the circuit board at WIAPA-M1800 wireless adapter place through signal wire, is connected to the main controller circuit plate by contact pin again, and display is connected to the main controller circuit plate through contact pin; Its circuit connects as follows:
Power supply: the 3.3V lithium battery power supply, use 3.3V to change 3V gate-controlled switch chip and to analog part and numerical portion required power supply be provided in the main controller circuit plate;
K type thermopair: thermopair is carried out the temperature that point for measuring temperature is gathered in voltage stabilizing, behind amplifying circuit and impedance matching circuit, be sent to A/D, output to controller after converting digital signal into;
16 A/D: the ADS1110 chip of selecting the texas,U.S electric corporation for use; Adopt the interface of I2C form; Because the low-noise programmable instrument amplifier of built-in 1 one 8 gains can carry out processing and amplifying to the voltage signal that comes amplifying circuit and sampling is converted into digital signal;
MCU: choosing is handled the digital signal of A/D output; Computation of table lookup goes out temperature, communicates by letter with long-range PC through wireless module, receives the temperature calibration parameter list; The result who collects is uploaded PC and other real-time Communication for Power, through the switching of mode of operation being carried out energy consumption control;
Signal conditioning circuit: the millivolt level signal to the thermopair collection amplifies, filtering, impedance matching;
Eeprom memory: because the output voltage of thermopair and the relation of temperature are non-linear, so use the EEPROM storage electric thermo-couple temperature of 64K to divide kilsyth basalt;
Display: show the temperature of the point for measuring temperature that thermopair is gathered and the temperature under the current environment of instrument place, 0.25 ℃ of measuring accuracy;
Radio communication: the data of collection send to the WIAPA-M1800 wireless communication module through serial ports; Insert the WIAPA-GW1498 radio network gateway again; On long-range PC, data are shown; To be sent to MCU through this wireless module corresponding to the branch kilsyth basalt of each sensor probe by PC when using for the first time in system simultaneously, be kept in the external memory storage.
2. real-time radio telecommunications industry thermocouple temperature transmitter according to claim 1, it is following to it is characterized in that hardware connects with working method:
Power supply: 3.3V lithium battery power supply; Use 3.3V to change 3V gate-controlled switch chip in the main controller circuit plate and required power supply is provided analog part and numerical portion; 3.3V power supply is by C3, C14, C15, C16, C20, C21, C22, C24 filtering, the 3V power supply is by C1, C9, C10, C18 filtering;
K type thermopair: the output plus terminal of thermopair is divided into two-way; Wherein one road positive pole links to each other with No. 3 pins of 2 voltage stabilizing chips with negative pole; Another road is anodal to link to each other with another voltage stabilizing chip through R13, and No. 2 pins of voltage stabilizing chip connect the 3V power supply, No. 1 pin ground connection;
16 A/D: the ADS1110 chip of selecting the texas,U.S electric corporation for use; Adopt the interface of I2C form; 1 pin of ADS1110 is connected with the output terminal of the second operational amplifier OP2; 3 pin of ADS1110,4 pin link to each other with the end of pull-up resistor R37, R38, and 5 pin of the other end of R7, R8 and ADS1110 are connected 2 pin of DS1110 and 6 pin ground connection with+3.3V power supply;
MCU: select the MSP430F149 chip of texas,U.S electric corporation for use, crystal oscillator is selected 3.6264MHz for use, and program is downloaded use standard jtag interface; XT2IN, XT2OUT are connected with crystal oscillator; Between connect resistance R 17, to ground, 54,55,56,57 pin of MCU link to each other with 1,3,5,7 pin of double cab JP2 respectively through C11, C12; 12 of MCU links to each other with 6 pin with 2 pin of JP2 respectively with 22 pin, and 58 pin of MCU link to each other with 11 pin of JP2;
Signal conditioning circuit: the positive pole of thermopair is connected with the end of filter resistance R31, and the other end of R31 is connected with the end of filter capacitor C31, the end of filter resistance R32 respectively;
The other end of R2 is connected with the in-phase input end of the first operational amplifier OP1, and the inverting input of OP1 is connected with the end of feedback resistance R33, the end of R34, the end of feedback capacity C32 respectively;
The other end of R34 is connected with the other end of C32, the output terminal of OP1, the end of filter resistance R35 respectively; The other end of R35 is connected with the end of filter capacitor C33, the in-phase input end of the second operational amplifier OP2 respectively; The inverting input of OP2 is connected with the end of feedback resistance R36, the end of feedback capacity C34 respectively; The other end of R36 respectively with the other end of C34; The output of OP2 is short to be connected, the other end of the other end of the negative pole of thermopair, filter capacitor C31, the other end of feedback resistance R33, filter capacitor C33, the negative power end ground connection of operational amplifier, and the positive power source terminal of operational amplifier is connected with+3.3V power supply;
Eeprom memory: the 24LC64 chip of selecting MicroChip company for use; Adopt the I2C interface, by the power supply of 3.3V power supply, 5, No. 6 pin links to each other with P4.5, the P4.6 mouth of MCU through R20, R21 pull-up resistor; C25 is used for filtering, and 1,2,3, No. 4 pin ground connection is used for indicant reason address;
Display: select for use 48 pin HT1621B of spi bus structure to drive LCD screen; Wherein SEG0～SEG23 and COM0～COM3 totally 24 pins be connected with liquid-crystalline glasses; The DATA pin connects an end that draws resistance R 52 and is connected with the P5.1 mouth of MCU; The CS pin connects an end that draws resistance R 53 and is connected with the P1.5 mouth of MCU, and the WR pin connects an end that draws resistance R 54 and is connected with the P1.6 mouth of MCU, and the RD pin connects an end that draws resistance R 55 and is connected with the P1.7 mouth of MCU; The other end of pull-up resistor R52, R53, R54, R55 is connected with VDD; Be connected the R51 variable resistor between VDD and the VLCD pin, VDD is connected with ground wire respectively at the 3.3V power supply on the main controller circuit plate with VSS, and all the other pins are unsettled;
The P3.4 of radio communication: MCU, P3.5 mouth link to each other with the serial interface of WIAPA-M1800 wireless communication module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011201611343U CN202101765U (en) | 2011-05-19 | 2011-05-19 | Temperature transmitter for real-time wireless communication industrial thermocouple |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011201611343U CN202101765U (en) | 2011-05-19 | 2011-05-19 | Temperature transmitter for real-time wireless communication industrial thermocouple |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106482870A (en) * | 2016-11-24 | 2017-03-08 | 攀枝花学院 | Wolfram rhenium heat electric couple examines and determine data collecting system |
| CN108981944A (en) * | 2018-08-03 | 2018-12-11 | 安徽银汉机电科技有限公司 | Digital temperature switching controller |
| CN109764974A (en) * | 2019-01-28 | 2019-05-17 | 安徽天康(集团)股份有限公司 | A thermocouple for long-distance temperature measurement of a high-temperature torch |
-
2011
- 2011-05-19 CN CN2011201611343U patent/CN202101765U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106482870A (en) * | 2016-11-24 | 2017-03-08 | 攀枝花学院 | Wolfram rhenium heat electric couple examines and determine data collecting system |
| CN108981944A (en) * | 2018-08-03 | 2018-12-11 | 安徽银汉机电科技有限公司 | Digital temperature switching controller |
| CN109764974A (en) * | 2019-01-28 | 2019-05-17 | 安徽天康(集团)股份有限公司 | A thermocouple for long-distance temperature measurement of a high-temperature torch |
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