CN107328456A - One kind extension radar guided wave radar levelmeter - Google Patents
One kind extension radar guided wave radar levelmeter Download PDFInfo
- Publication number
- CN107328456A CN107328456A CN201710703570.0A CN201710703570A CN107328456A CN 107328456 A CN107328456 A CN 107328456A CN 201710703570 A CN201710703570 A CN 201710703570A CN 107328456 A CN107328456 A CN 107328456A
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- CN
- China
- Prior art keywords
- signal
- guided wave
- module
- control module
- thing position
- 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.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/40—Transceivers
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- General Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The present invention relates to the technical field of level meter, a kind of particularly extension radar guided wave radar levelmeter, including：Power module, for providing stable power supply to the modules being connected electrically；Acquisition module, for gathering thing position signal, wherein, thing position signal is the high-frequency pulse signal that measured medium reflects, and thing position signal is sent to control module；Control module, for the thing position signal of reception to be carried out into data processing, 4~20mA analog signals are generated by pulsewidth modulation, are additionally operable to handle the data signal that HART communication module is sent, generation replys frame and feeds back to HART communication module；HART communication module, sends to control module for detecting analog signal, and analog signal being demodulated into data signal, solve guided wave decay in transmitting procedure cause thing position signal intensity it is low the problem of, it is ensured that thing position measurement accuracy.
Description
Technical field
It is particularly a kind of to extend radar guided wave radar levelmeter the present invention relates to the technical field of level meter.
Background technology
Guided wave radar material level gauge uses time domain reflection technology (TDR), and the high-frequency impulse that instrument is sent enters along guided wave bar (cable)
Row is propagated, and is run into after measured medium, because dielectric constant is undergone mutation, the portion of energy of high-frequency impulse is reflected, reflected impulse
Instrument is returned to along guided wave bar (cable).By measuring the time difference of transmitting pulse and reflected impulse, measured matter can be calculated and arrived
The distance of instrument flange.Then according to the full irrigation of setting and slack tank positional value, height of materials can be calculated and 4~20mA electricity is exported
Stream.
However, existing guided wave radar material level gauge is when analog signal and data signal are transmitted, it usually needs arrangement
Two channels, not only increase the cost that equipment instrument is installed, safeguarded, using, meanwhile, also reduce the utilization of equipment instrument
Rate, is unfavorable for promoting.
Chinese patent CN 201410849446.1 provides a kind of guided wave radar material level gauge, solves and leads in the prior art
Ripple radar levelmeter causes asking for instrument cost waste because of transmission means in data signal and analog signal synchronous transfer
Topic, but guided wave is decayed in transmitting procedure causes the problem of thing position signal intensity is relatively low compared with conference, finally measures inaccurate.
The content of the invention
The technical problem to be solved in the present invention is：In order to solve guided wave decay in transmitting procedure cause thing position signal intensity
Low the problem of, extend radar guided wave radar levelmeter the invention provides one kind, set between acquisition module and control module
There is guided wave extension tube, reduce decay of the guided wave in transmitting procedure, it is ensured that thing position signal intensity.
The technical solution adopted for the present invention to solve the technical problems is：One kind extension radar guided wave radar levelmeter,
Including：Acquisition module, power module, HART communication module and control module, the power module are electric with other modules
Connection,
The power module, for providing stable power supply to the modules being connected electrically；
The acquisition module, for gathering thing position signal, wherein, thing position signal is the high frequency arteries and veins that measured medium reflects
Signal is rushed, and thing position signal is sent to the control module；
The control module, for the thing of reception position signal to be carried out into data processing, by pulsewidth modulation generation 4~
20mA analog signals, are additionally operable to handle the data signal that the HART communication module is sent, generation reply frame feeds back to described
HART communication module；
The HART communication module, sends for detecting analog signal, and the analog signal being demodulated into data signal
To the control module, wherein the data signal, which is HART, asks frame signal, it is additionally operable to modulate the HART communication module anti-
The reply frame of feedback, the reply frame is superimposed in 4~20mA analog signals and transmitted；
Guided wave extension tube is provided between the acquisition module and control module.
Specifically, the control module is additionally provided with transceiver interface unit, and guided wave extension tube is connected with transceiver interface unit.
Specifically, the transceiver interface unit carries out the reception and transmission of signal using interrupt mode.
Specifically, in addition to：Display control module, the display control module is connected with control module.
Specifically, the control module includes：Microwave radio unit and MCU units；
The microwave radio unit, for the thing position signal of reception to be carried out into data processing, wherein, at the data
Reason at least includes, according to setting meter parameter variate-value to be handled, 4~20mA analog signals being generated by pulsewidth modulation；
The MCU units, for the HART request frame signals of reception to be carried out into dissection process, according to the HART of extraction
Frame is replied in the variable generation asked the frame information of frame signal and pre-set.
Specifically, the HART communication module, including：Demodulating unit, modulating unit and Transmit-Receive Unit,
The demodulating unit, for the thing position signal of reception to be demodulated, changes into HART request frame signals；
The modulating unit, for the reply frame of reception to be modulated, is superimposed in 4~20mA analog signals；
The Transmit-Receive Unit, for transmitting the signal that the demodulating unit is handled with the modulating unit.
Specifically, the HART communication module, in addition to：Detection unit, the detection unit is connected with demodulating unit.
Specifically, the model SD2015A of the HART communication module, any one in HT2015 or A5191HRT.
The beneficial effects of the invention are as follows：
Extend radar guided wave radar levelmeter the invention provides one kind, be provided between acquisition module and control module
Guided wave extension tube, reduces decay of the guided wave in transmitting procedure, it is ensured that thing position signal intensity.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is a kind of structural representation for extending radar guided wave radar levelmeter of the present invention；
In figure：1. power module, 2. acquisition modules, 3. control modules, 31. microwave radio units, 32.MCU units,
4.HART communication modules, 41. detection units, 42. demodulating units, 43. modulating units, 5. guided wave extension tubes, 6. transceiver interface lists
Member.
Embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These accompanying drawings are simplified schematic diagram, only with
Illustration illustrates the basic structure of the present invention, therefore it only shows the composition relevant with the present invention.
As illustrated, extend radar guided wave radar levelmeter the invention provides one kind, including：Acquisition module 2, power supply
Module 1, HART communication module 4 and control module 3, power module 1 are electrically connected with other modules,
Power module 1, for providing stable power supply to the modules being connected electrically；
Acquisition module 2, for gathering thing position signal, wherein, thing position signal is the high-frequency pulse signal that measured medium reflects,
And send thing position signal to control module 3；
Control module 3, for the thing position signal of reception to be carried out into data processing, 4~20mA moulds are generated by pulsewidth modulation
Intend signal, be additionally operable to handle the data signal that HART communication module 4 is sent, generation replys frame and feeds back to HART communication module 4；
HART communication module 4, sends to control mould for detecting analog signal, and analog signal being demodulated into data signal
Block 3, wherein data signal are that HART asks frame signal, are additionally operable to modulate the reply frame of the feedback of HART communication module 4, will reply frame
It is superimposed in 4~20mA analog signals and transmits；
Guided wave extension tube 5 is provided between acquisition module 2 and control module 3.
In use, when the detection unit 41 in HART communication module 4 detects the thing position signal transmitted in bus, by thing
Position analog signal is sent to demodulating unit 42, and thing position analog signal is demodulated to HART request frame signals by demodulating unit 42；Will
HART requests frame signal is sent to the MCU units 32 of control module 3, and MCU units 32 are asked in frame signal according to the HART of extraction
Frame information and the variable that pre-sets, generation replys frame and sends to modulating unit 43, and it is folded that modulating unit 43 will reply frame modulation
Add in 4~20mA analog signals, realized by HART communication module 4 in guided wave radar material level gauge analog signals and numeral
Signal synchronous transfer；The cost of guided wave radar material level gauge transmission is reduced, the utilization rate of guided wave radar material level gauge is improved；Adopting
Collect and guided wave extension tube 5 is provided between module 2 and control module 3, reduce the decay during guided waves propagation, it is ensured that thing position signal
Intensity.
Specifically, control module 3 is additionally provided with transceiver interface unit 6, and guided wave extension tube 5 is connected with transceiver interface unit 6.
Specifically, transceiver interface unit 6 carries out the reception and transmission of signal using interrupt mode.
Specifically, in addition to：Display control module 3, display control module 3 is connected with control module 3, display control module
3 can add key device for display, and key device can realize that the range to radar, measurement range and output current etc. are joined
Number adjusts.
Specifically, control module 3 includes：Microwave radio unit 31 and MCU units 32；
Microwave radio unit 31, for the thing position signal of reception to be carried out into data processing, wherein, data processing at least includes
According to setting meter parameter variate-value to be handled, 4~20mA analog signals are generated by pulsewidth modulation；
MCU units 32, for the HART request frame signals of reception to be carried out into dissection process, according to the HART claim frames of extraction
Frame is replied in the frame information of signal and the variable generation pre-set, and MCU (micro-control unit) can also be CPU (center processing
Device) or MPU (microprocessor), of the invention without limitation, preferably MCU carries serial line interface in itself, can be with HART communication
Module is joined directly together.
Specifically, HART communication module 4, including：Demodulating unit 42 and modulating unit 43,
Demodulating unit 42, for the thing position signal of reception to be demodulated, changes into HART request frame signals；
Modulating unit 43, for the reply frame of reception to be modulated, is superimposed in 4~20mA analog signals；
Specifically, HART communication module 4, in addition to：Detection unit 41, detection unit 41 is connected with demodulating unit 42.
Specifically, the model SD2015A of HART communication module 4, any one in HT2015 or A5191HRT, have
Control logic, carrier wave detection, modulation and demodulation function, use the Bell202 frequency shift keying signals of standard to enter with 1200 baud rates
Row communication.
Using the above-mentioned desirable embodiment according to the present invention as enlightenment, by above-mentioned description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property scope is not limited to the content on specification, it is necessary to its technical scope is determined according to right.
Claims (8)
1. one kind extension radar guided wave radar levelmeter, including：Acquisition module (2), power module (1), HART communication module
(4) and control module (3), the power module (1) electrically connects with other modules,
The power module (1), for providing stable power supply to the modules being connected electrically；
The acquisition module (2), for gathering thing position signal, wherein, thing position signal is the high frequency arteries and veins that measured medium reflects
Signal is rushed, and thing position signal is sent to the control module (3)；
The control module (3), for the thing of reception position signal to be carried out into data processing, by pulsewidth modulation generation 4~
20mA analog signals, are additionally operable to handle the data signal that the HART communication module (4) sends, generation reply frame feeds back to described
HART communication module (4)；
The HART communication module (4), for detecting analog signal, and by the analog signal be demodulated into data signal send to
The control module (3), wherein the data signal, which is HART, asks frame signal, is additionally operable to modulate the HART communication module
(4) the reply frame of feedback, the reply frame is superimposed in 4~20mA analog signals and transmitted；
It is characterized in that：Guided wave extension tube (5) is provided between the acquisition module (2) and control module (3).
2. a kind of extension radar guided wave radar levelmeter as claimed in claim 1, it is characterised in that：The control module
(3) transceiver interface unit (6) is additionally provided with, the transceiver interface unit (6) is connected with guided wave extension tube (5).
3. a kind of extension radar guided wave radar levelmeter as claimed in claim 2, it is characterised in that：The transceiver interface list
First (6) carry out the reception and transmission of signal using interrupt mode.
4. a kind of extension radar guided wave radar levelmeter as claimed in claim 1, it is characterised in that：Also include：Display control
Molding block (3), the display control module (3) is connected with control module (3).
5. a kind of extension radar guided wave radar levelmeter as claimed in claim 1, it is characterised in that：The control module
(3) include：Microwave radio unit (31) and MCU units (32)；
The microwave radio unit (31), for the thing position signal of reception to be carried out into data processing, wherein, at the data
Reason at least includes, according to setting meter parameter variate-value to be handled, 4~20mA analog signals being generated by pulsewidth modulation；
The MCU units (32), for the HART request frame signals of reception to be carried out into dissection process, according to the HART of extraction
Frame is replied in the variable generation asked the frame information of frame signal and pre-set.
6. a kind of extension radar guided wave radar levelmeter as claimed in claim 5, it is characterised in that：The HART communication mould
Block (4), including：Demodulating unit (42) and modulating unit (43),
The demodulating unit (42), for the thing position signal of reception to be demodulated, changes into HART request frame signals；
The modulating unit (43), for the reply frame of reception to be modulated, is superimposed in 4~20mA analog signals.
7. a kind of extension radar guided wave radar levelmeter as claimed in claim 6, it is characterised in that：The HART communication mould
Block (4), in addition to：Detection unit (41), the detection unit (41) is connected with demodulating unit (42).
8. a kind of extension radar guided wave radar levelmeter as claimed in claim 1, it is characterised in that：The HART communication mould
The model SD2015A of block (4), any one in HT2015 or A5191HRT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710703570.0A CN107328456A (en) | 2017-08-16 | 2017-08-16 | One kind extension radar guided wave radar levelmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710703570.0A CN107328456A (en) | 2017-08-16 | 2017-08-16 | One kind extension radar guided wave radar levelmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107328456A true CN107328456A (en) | 2017-11-07 |
Family
ID=60201123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710703570.0A Pending CN107328456A (en) | 2017-08-16 | 2017-08-16 | One kind extension radar guided wave radar levelmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107328456A (en) |
-
2017
- 2017-08-16 CN CN201710703570.0A patent/CN107328456A/en active Pending
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171107 |