CN201352134Y - Low-temperature type Coriolis mass flow transmitter - Google Patents
Low-temperature type Coriolis mass flow transmitter Download PDFInfo
- Publication number
- CN201352134Y CN201352134Y CNU2009200674511U CN200920067451U CN201352134Y CN 201352134 Y CN201352134 Y CN 201352134Y CN U2009200674511 U CNU2009200674511 U CN U2009200674511U CN 200920067451 U CN200920067451 U CN 200920067451U CN 201352134 Y CN201352134 Y CN 201352134Y
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- Prior art keywords
- circuit
- temperature
- coriolis mass
- mass flow
- flow transmitter
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- Expired - Fee Related
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- 238000004891 communication Methods 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 239000004973 liquid crystal related substance Substances 0.000 description 8
- 238000005259 measurement Methods 0.000 description 6
- 230000003321 amplification Effects 0.000 description 1
- 239000002800 charge carrier Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
A Low-temperature type Coriolis mass flow transmitter relates to a Coriolis mass flow transmitter and aims to provide a Coriolis mass flow transmitter capable of normally operating in lower temperature environment; the technical proposal of the utility model includes that the low-temperature type Coriolis mass flow transmitter is composed of a safe grate, a detection circuit, a drive circuit, a temperature measuring circuit, a microprocessor, a memory, a keyboard, an analog output circuit, a RS485 digital communication module and a display module; the utility model is characterized in that the display module adopts OLED display module; the microprocessor is connected with an internal temperature detection circuit and an internal heating circuit composed of two JFET tubes and two power resistors through connecting wires; the internal temperature detection circuit comprises a PT 100 internal temperature sensor which is adhered and fixed above the circuit board; two power resistors of the internal heating circuit are respectively welded on the left upper side and the right lower side of the circuit board. The utility model is applicable to Coriolis mass flow transmitter.
Description
Technical field
The utility model relates to coriolis mass flowmeters.
Background technology
Coriolis mass flowmeters is the flow measurement instrument that utilizes the Coriolis force principle.Coriolis mass flowmeters is made up of mass flow sensor and mass flow transmitter, is connected by connecting line (one mount type) or stube cable (partial installation type) between the two.The Coriolis mass and flow transmitter receives the two-way sine wave signal that the left coil that sent by mass flow sensor and right coil produce, by the relevant detection circuit to signal amplify, filtering, shaping, by the corresponding mass flow measurement result of calculating of microprocessor, simultaneously, the sine wave signal that left coil is sent by driving circuit detection and amplify after, be sent to drive coil, the flow sensor of ensuring the quality of products is operated in normal duty; Simultaneously, a PT100 temperature sensor is installed on the mass flow sensor, and mass flow transmitter cooperates temperature measuring circuit to obtain the temperature data of sensor by this temperature sensor.In addition, mass flow transmitter also comprises a storer and comes storage of measurement data and parameter of user, a keyboard is accepted user's input, an analog output module that comprises 4～20mA electric current loop and impulse output circuit, a RS485 digital communication module and a liquid crystal display device module.
Coriolis mass flowmeters is as one of most advanced in the world, accurate flow measurement instrument at present, in occasion widespread uses such as the detection of industry technological processs such as oil, petrochemical industry, chemical industry, pharmacy, papermaking, food and the energy and trade transaction meterings, the great attention and the users that have been subjected to domestic and international flow measurement circle welcome.Along with the continuous progress of society and the further expansion of commercial production scale, for the requirement of accurate measurement also in further raising.But at present most Coriolis mass and flow transmitters are limited by LCD and electronic component working temperature, can not be under lower environment temperature operate as normal.Operate as normal when LCD can only be higher than-10 ℃ in environment temperature usually, the electronic component that the Coriolis mass and flow transmitter uses generally is not higher than technical grade, be that working temperature can not be lower than-40 ℃, this has just limited the application of coriolis mass flowmeters in these areas greatly.
The utility model content
The purpose of this utility model provides a kind of Coriolis mass and flow transmitter of operate as normal at a lower temperature.
The technical solution of the utility model is by safety barrier, testing circuit, driving circuit, temperature measuring circuit, microprocessor, storer, keyboard, analog output circuit, RS485 digital communication module and a display module are formed, it is characterized in that display module adopts the OLED display module, microprocessor connects an internal temperature testing circuit by connecting line and the inside be made up of two JFET pipes and two power resistors adds circuit temperature, the internal temperature testing circuit has PT100 internal temperature sensor to adopt heat conductive silica gel to be adhesively fixed on the circuit board top, and two power resistors that inside adds circuit temperature are welded on the lower left and the lower right of circuit board respectively.
OLED display of the present utility model has the advantage that autoluminescence, low power consumption, serviceability temperature scope (40～80 ℃) are wide, the anti-vibration ability is strong.OLED display module external circuit interface and common liquid crystals module class seemingly, with the connected mode of microprocessor and common liquid crystals module class seemingly, can directly substitute the common liquid crystals module.Inside adds the open and close of circuit temperature by the microprocessor internal programmed control, connects the power resistor device when working temperature when transmitter inside is lower than-35 ℃, is used for the inner intensification of transmitter; Disconnect the power resistor device when working temperature when transmitter inside is higher than-20 ℃, with the working temperature that guarantees transmitter inside be in all the time one can the scope of operate as normal in.The utility model is normal metering and normal on-the-spot the demonstration when externally environment temperature is low to moderate-50 ℃, expanded the range of application of coriolis mass flowmeters greatly.
Description of drawings
The coriolis mass flowmeters of Fig. 1, expression prior art is formed structural drawing;
Fig. 2, expression low form coriolis mass flowmeters are formed structural drawing;
Fig. 3, expression OLED display module are formed structural drawing;
Fig. 4, expression internal temperature testing circuit and the inside circuit of heating is formed structural drawing;
Embodiment
The utility model (see figure 2) is made up of safety barrier 301, testing circuit 302, driving circuit 307, temperature measuring circuit 308, microprocessor 305, storer 303, keyboard 304, analog output circuit 306, RS485 digital communication module 309 and a display module 310, and display module wherein adopts the OLED display module; Microprocessor adopts connecting line to connect an internal temperature testing circuit 312 and inside adds circuit temperature 311, internal temperature testing circuit 312 is made up of an internal temperature sensor PT100 and corresponding temperature sensing circuit, inside adds circuit temperature 311 and is made up of two JFET pipes and two power resistors, internal temperature testing circuit and inside add circuit temperature and are installed on the circuit board, internal temperature sensor PT100 uses heat conductive silica gel to be adhesively fixed on the circuit board top, is used for the temperature in the monitoring transducer; Two power resistors are welded on the lower left and the lower right of circuit board respectively, are used to improve temperature inside.Using two power resistors is in order to improve the homogeneity of internal temperature.
OLED (OrganicLight-EmittingDisplay, organic light emitting display) be organic semiconducting materials and luminescent material under electric field driven, inject a kind of display device of recombination luminescence by charge carrier.It has the plurality of advantages that autoluminescence, low power consumption, serviceability temperature scope are wide, the anti-vibration ability is strong.The OLED display module is integrated OLED array of display, module logical circuit and interface circuit, except on operating temperature range (40～80 ℃) and power consumption index, being better than the common liquid crystals display, its external circuit interface and common liquid crystals module class seemingly can directly substitute the common liquid crystals module.Accompanying drawing 3 is structural drawing of OLED display module, the connected mode of it and microprocessor and common liquid crystals module class are seemingly, the current supply circuit of 3.3V or 5V is provided, D0～D7 is as parallel data grabbing card, D/C, R/W, RD, CS cooperate corresponding read-write sequence to operate the OLED display module as control interface.
Internal temperature testing circuit and inside add circuit temperature (seeing accompanying drawing 4) and produce fixing voltage signal by constant pressure source 9, the electric bridge that R1, R2, R3 and temperature sensor 1 are formed produces differential voltage signal, through the amplification of amplifying circuit 10 and the conversion of V/F change-over circuit 12, become frequency signal and send microprocessor 11 to, microprocessor is through calculating internal temperature data.Microprocessor judges need be opened inside when adding circuit temperature, and output voltage signal is opened JFET pipe T1, T2, and electric current flows through two power resistors by T1, T2, and beginning is the heating of transmitter inside; Microprocessor judges does not need to open inside when adding circuit temperature, turn-offs JFET pipe T1, T2, stops heating.Inside adds the open and close of circuit temperature by the microprocessor internal programmed control, and its program circuit is regularly called by master routine.Connecting the power resistor device when working temperature when transmitter inside is lower than-35 ℃, be used for the inner intensification of transmitter, connect the power resistor device when being lower than-35 ℃, is in order to give power resistor certain preheating time.Disconnect the power resistor device when working temperature when transmitter inside is higher than-20 ℃, with the working temperature that guarantees Coriolis mass and flow transmitter inside be in all the time one can the scope of operate as normal in.
Claims (1)
1, low form Coriolis mass and flow transmitter, by safety barrier, testing circuit, driving circuit, temperature measuring circuit, microprocessor, storer, keyboard, analog output circuit, RS485 digital communication module and a display module are formed, it is characterized in that display module adopts the OLED display module, microprocessor connects an internal temperature testing circuit by connecting line and the inside be made up of two JFET pipes and two power resistors adds circuit temperature, the internal temperature testing circuit has PT100 internal temperature sensor to adopt heat conductive silica gel to be adhesively fixed on the circuit board top, and two power resistors that inside adds circuit temperature are welded on the lower left and the lower right of circuit board respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200674511U CN201352134Y (en) | 2009-02-02 | 2009-02-02 | Low-temperature type Coriolis mass flow transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200674511U CN201352134Y (en) | 2009-02-02 | 2009-02-02 | Low-temperature type Coriolis mass flow transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201352134Y true CN201352134Y (en) | 2009-11-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200674511U Expired - Fee Related CN201352134Y (en) | 2009-02-02 | 2009-02-02 | Low-temperature type Coriolis mass flow transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201352134Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832803A (en) * | 2010-03-31 | 2010-09-15 | 太原太航流量工程有限公司 | Coriolis mass flow meter digital signal processing device based on synchronous modulation and method thereof |
| CN111670343A (en) * | 2018-02-02 | 2020-09-15 | 恩德斯+豪斯流量技术股份有限公司 | Coriolis Measurement Transducers and Coriolis Measurement Devices |
-
2009
- 2009-02-02 CN CNU2009200674511U patent/CN201352134Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832803A (en) * | 2010-03-31 | 2010-09-15 | 太原太航流量工程有限公司 | Coriolis mass flow meter digital signal processing device based on synchronous modulation and method thereof |
| CN111670343A (en) * | 2018-02-02 | 2020-09-15 | 恩德斯+豪斯流量技术股份有限公司 | Coriolis Measurement Transducers and Coriolis Measurement Devices |
| CN111670343B (en) * | 2018-02-02 | 2022-07-22 | 恩德斯+豪斯流量技术股份有限公司 | Coriolis measuring transducer and coriolis measuring device |
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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: 20091125 Termination date: 20180202 |