CN102305653A - Wireless industrial liquid level transmitter - Google Patents
Wireless industrial liquid level transmitter Download PDFInfo
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- CN102305653A CN102305653A CN201110130557A CN201110130557A CN102305653A CN 102305653 A CN102305653 A CN 102305653A CN 201110130557 A CN201110130557 A CN 201110130557A CN 201110130557 A CN201110130557 A CN 201110130557A CN 102305653 A CN102305653 A CN 102305653A
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- 239000007788 liquid Substances 0.000 title claims abstract description 16
- 238000004891 communication Methods 0.000 claims abstract description 19
- 238000005259 measurement Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 6
- 230000003750 conditioning effect Effects 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 4
- 239000013078 crystal Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 239000000523 sample Substances 0.000 claims description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims 8
- 229910052710 silicon Inorganic materials 0.000 claims 7
- 239000010703 silicon Substances 0.000 claims 7
- 239000004065 semiconductor Substances 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000003068 static effect Effects 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 15
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
本发明公开了无线工业液位变送器，该液位变送器包括三通外壳、WIAPA-M1800无线适配器、主控制器电路板、显示器、3.3V电源、WIA网关，在外壳的两个较大开口处安装显示器和连接电源，在外壳内部安装WIAPA-M1800无线适配器和主控制器电路板，在外壳较小开口处安装无线天线，压力传感器直接连接到主控制器电路板，显示器通过插针连接至主控制器电路板。本发明利用同一压敏芯片，既测静压又测温度，变送器基于智能无线网络WIA技术体系，主要面向设备间信息的无线通信，特别适合在恶劣的工业现场环境使用，具有很强的抗干扰能力、超低功耗、实时通信等技术特征。
The invention discloses a wireless industrial liquid level transmitter. The liquid level transmitter includes a three-way shell, a WIAPA-M1800 wireless adapter, a main controller circuit board, a display, a 3.3V power supply, and a WIA gateway. Install the display and connect the power supply at the large opening, install the WIAPA-M1800 wireless adapter and the main controller circuit board inside the casing, install the wireless antenna at the small opening of the casing, the pressure sensor is directly connected to the main controller circuit board, and the display is through pins Connects to the main controller board. The invention uses the same pressure-sensitive chip to measure both static pressure and temperature. The transmitter is based on the intelligent wireless network WIA technology system and is mainly oriented to wireless communication of information between devices. It is especially suitable for use in harsh industrial field environments and has strong Anti-interference ability, ultra-low power consumption, real-time communication and other technical features.
Description
Technical field
The present invention relates to fluid level transmitter, be specifically related to a kind of wireless industrial fluid level transmitter.
Background technology
Liquid level has measuring methods such as float-type, pressure type, condenser type, laser type, ultrasonic type.Whether the sensing element by measuring liquid level contacts with fluid to be measured, and liquid level instrument can be divided into contact-type and non-contact type two big classes.The contact-type level measuring method mainly contains: hand gauging method, float measurement device, servo-type level meter, capacitance level gauge and magnetostriction liquidometer etc.Their common ground is that the sensing element of measuring contacts with fluid to be measured, promptly all exists with contacted measurement component of fluid to be measured and majority to have movable member.Therefore have certain wearing and tearing and stained or cling by liquid easily, especially the bar type structure device also need have bigger installing space, is inconvenient to install and overhaul.The non-contact type level gauging mainly contains ultrasonic level gage, microwave radar liquid level gauge, gamma ray level meter and laser liquid level gauge etc. as its name suggests, and the common feature of this type measurement instrument is that the sensing element of measuring does not contact with fluid to be measured.Therefore measurement component is not influenced by measured medium, do not influence measured medium, thereby its scope of application is comparatively extensive yet, can be used for the out of use special occasions of contact-type measurement instrument, as viscosity is high, corrosivity is strong, contaminative is serious, the medium of easy crystallization.
Development based on on-the-spot multisensor computer measurement and control systems such as river, river, lake, sea, Ba Qu, oil depots; Existing traditional liquid level transmitter can not meet the demands; And integrate information acquisition, information processing and digital communication functions; Can manage independently, the fluid level transmitter with intelligent characteristic is that production development is required.
Summary of the invention
The objective of the invention is to: a kind of wireless industrial fluid level transmitter is provided; On the basis of satisfying commercial measurement scope and required precision, realize low-power consumption; Be can be according to the wireless liquid level acquisition instrument of different model sensor in real time adjustment parameter; This instrument is according to the measuring principle of diffuse si formula pressure sensor; In conjunction with non-linear temperature compensation circuit and high-precision adc spare; Download diffuse si corresponding calculated coefficient by the WIA network from long-range host computer and accurately calculate pressure data; 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.
Technical solution of the present invention is: this fluid level transmitter comprises threeway shell, 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; Wireless antenna is installed at shell smaller opening place; Pressure transducer is directly connected to the main controller circuit plate, and display is connected to the main controller circuit plate through contact pin.
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.
Measuring method of the present invention is: in the measurement point of commercial unit this instrument is installed, 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 calculating parameter that host computer is corresponding with pressure transducer passes through the WIA network download to instrument; The environment temperature at platinum resistance thermometer sensor, measurement instrument place; The voltage signal that sensor is produced by the signal conditioning circuit of circuit board carries out differential signal collection, amplification, denoising to be handled; A/D converts analog voltage signal into digital signal; Master controller obtains temperature value accurately with the diffuse si calculating parameter of digital signal and download, and data in real time is uploaded.
The present invention has the following advantages:
1, volume of the present invention is little, and is in light weight, and sensor can be integrated with transmitter, visual good, real-time, easy to install.
2, modulus conversion chip adopt 16 D; Can make calibration number for the gamma correction acquisition precision of Pt100 thermal resistance 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.
3, fluid level transmitter of the present invention utilizes same chip varistor; Static pressure but also thermometric degree had not only been surveyed; Pressure, temperature signal input single-chip microcomputer after the A/D conversion; After strict compensation correction computing; Mode through wireless is sent to receiving end; Transmitter is based on intelligent wireless network WIA technical system; Meet IEEE 802.15.4 wireless communication standard; 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.
4, on the structure and performance basis of traditional throw-in type fluid level transmitter; The theory of combined with intelligent sensing system; Designed-kind of throw-in type integrated digital intelligent liquid level transmitter; Characteristics such as it has that volume is little, cost is low, antijamming capability is strong, stable performance, intelligent degree and reliability height; A plurality of digital fluid level transmitters can be formed data acquisition network; Only need through a pair of Shielded Twisted Pair; Host computer just can obtain the data of a plurality of digital fluid level transmitters; And can be provided with it, obtained satisfied effect in the practicality.
5, 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.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is controller and the peripheral circuit schematic diagram thereof of Fig. 1.
Fig. 3 is pressure data collection and the temperature-compensation circuit schematic diagram of Fig. 1.
Fig. 4 is radio communication and the power consumption control interface schema of Fig. 1.
Fig. 5 is the data processing circuit schematic diagram of Fig. 1.
Among the figure: 1, antenna, 2, LCDs, 3, the liquid level sensor probe, 4, shell.
Embodiment
Further specify technical solution of the present invention below in conjunction with accompanying drawing and embodiment, embodiment should not be construed as the restriction to technical solution.
Shown in Fig. 1-5; This fluid level transmitter comprises threeway shell, 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; Wireless antenna is installed at shell smaller opening place; Pressure transducer is directly connected to the main controller circuit plate, and display is connected to the main controller circuit plate through contact pin; Wherein, physical 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;
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; 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: the MSP430F149 chip of selecting the texas,U.S electric corporation for use; Crystal oscillator is selected 3.6264MHz for use; 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;
Pressure transducer: R42, R43, R44 and diffuse si are formed the strain transducer electric bridge; In order to guarantee the stability of bridge output voltage signal; The input voltage of electric bridge passes through TL431 surely to 2.5V; The differential signal that obtains from electric bridge carries out temperature compensation to thermocouple output signal; A brachium pontis of electric bridge adopts adjustable resistance R43; Can adjust the differential voltage signal size that is input to amplifier through regulating R43, be generally used for adjusting zero point;
Signal conditioning circuit: an end of diffuse si is that an equilibrium point of electric bridge is connected with an end of resistance R 45; The other end of R45 is connected with amplification resistance R 47 with the in-phase input end of operational amplifier OP respectively, and the inverting input of OP is connected with an end of resistance R 46, the negative input end of A/D respectively.Another equilibrium point of the other end electric bridge of R46 connects; The other end of R47 is connected with an end, the output terminal of operational amplifier OP, the filter resistance R40 of filter capacitor C42 respectively; The other end of R40 is connected with the positive input terminal of A/D; The negative power end ground connection of the other end of filter capacitor C42, operational amplifier, 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; The WR pin connects an end that draws resistance R 54 and is connected with the P1.6 mouth of MCU; The RD pin connects an end that draws resistance R 55 and is connected with the P1.7 mouth of MCU; Pull-up resistor R52; R53; R54; The other end of 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)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110130557A CN102305653A (en) | 2011-05-19 | 2011-05-19 | Wireless industrial liquid level transmitter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110130557A CN102305653A (en) | 2011-05-19 | 2011-05-19 | Wireless industrial liquid level transmitter |
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|---|---|
| CN102305653A true CN102305653A (en) | 2012-01-04 |
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| CN201110130557A Pending CN102305653A (en) | 2011-05-19 | 2011-05-19 | Wireless industrial liquid level transmitter |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103090923A (en) * | 2013-01-16 | 2013-05-08 | 江苏苏仪集团有限公司 | Material position wireless measurement instrument of ash bank |
| CN103871219A (en) * | 2014-03-14 | 2014-06-18 | 江苏红光仪表厂有限公司 | Voltage signal wireless transmission device |
| CN104615029A (en) * | 2014-11-20 | 2015-05-13 | 蚌埠天光传感器有限公司 | Digital measurement and control transmitter |
| CN107126088A (en) * | 2017-06-12 | 2017-09-05 | 浙江绍兴苏泊尔生活电器有限公司 | Heating container |
| CN110631655A (en) * | 2019-10-11 | 2019-12-31 | 江苏智冷物联技术有限公司 | An integrated wireless remote liquid level gauge |
| CN112857428A (en) * | 2021-01-19 | 2021-05-28 | 安徽络嵌控制系统有限公司 | High-precision multichannel wireless transmitter |
| CN114199341A (en) * | 2021-12-15 | 2022-03-18 | 长园电力技术有限公司 | Cable termination liquid level monitoring device |
-
2011
- 2011-05-19 CN CN201110130557A patent/CN102305653A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103090923A (en) * | 2013-01-16 | 2013-05-08 | 江苏苏仪集团有限公司 | Material position wireless measurement instrument of ash bank |
| CN103871219A (en) * | 2014-03-14 | 2014-06-18 | 江苏红光仪表厂有限公司 | Voltage signal wireless transmission device |
| CN104615029A (en) * | 2014-11-20 | 2015-05-13 | 蚌埠天光传感器有限公司 | Digital measurement and control transmitter |
| CN107126088A (en) * | 2017-06-12 | 2017-09-05 | 浙江绍兴苏泊尔生活电器有限公司 | Heating container |
| CN110631655A (en) * | 2019-10-11 | 2019-12-31 | 江苏智冷物联技术有限公司 | An integrated wireless remote liquid level gauge |
| CN112857428A (en) * | 2021-01-19 | 2021-05-28 | 安徽络嵌控制系统有限公司 | High-precision multichannel wireless transmitter |
| CN114199341A (en) * | 2021-12-15 | 2022-03-18 | 长园电力技术有限公司 | Cable termination liquid level monitoring device |
| CN114199341B (en) * | 2021-12-15 | 2022-08-12 | 长园电力技术有限公司 | Cable termination liquid level monitoring device |
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Application publication date: 20120104 |