CN104729764A - Ultra-small handheld ultrasonic heat flow measuring device - Google Patents
Ultra-small handheld ultrasonic heat flow measuring device Download PDFInfo
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- CN104729764A CN104729764A CN201510155578.9A CN201510155578A CN104729764A CN 104729764 A CN104729764 A CN 104729764A CN 201510155578 A CN201510155578 A CN 201510155578A CN 104729764 A CN104729764 A CN 104729764A
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Abstract
The invention relates to an ultra-small handheld ultrasonic heat flow measuring device comprising an ultrasonic wave transceiving module, a liquid measuring module, a temperature measuring module, an ARM controller, a liquid crystal display module, a keyboard input module, a Bluetooth serial port module and a power source management circuit. A control circuit with symmetrical ultrasonic wave transceiving is adopted by the ultra-small handheld ultrasonic heat flow measuring device, zero drift of ultrasonic measurement is further reduced, and the precision of a system is optimized.
Description
Technical field
The present invention relates to a kind of measurement mechanism, especially relate to a kind of microminiature hand-hold ultrasonic heat flow measurement mechanism.
Background technology
The research that external flow meter is demarcated is more flourishing, and representative mainly containing is following:
A, the main learning gas of American National flow standard research institute and fluid flow device, this research institute obtains discharge calibrating installation as U.S.'s highest standard, and for transmission of quantity value and scientific research, the method adopted is weighing method.The accuracy class of device is 0.13 grade, and this calibrating installation is without water tower.
What a set of high-precision liquid flow standard device that B, German National physics laboratory (PTB) build adopted is also weighing method, and maximum flow is 2100m
3/ h.Device have employed double-vane chip commutator, and considers the extraneous factor much affecting weighing section uncertainty.The expanded uncertainty of this device is better than 0.02%, and the expanded uncertainty of weighing system is better than 0.01%.The other a set of controllable temperature moral of PTB moves/Static mass method water flow standard apparatus, and temperature range 30-90 DEG C, flow measurement range is 3-1000 m
3/ h, its expanded uncertainty is better than 0.04%.
C, National Engineering Laboratory as the highest standard of Britain, employing be weighing method, each weighing container of its device is placed on the double weighing device that is combined into by mechanical scale and electronic scales, and this device precision is 0.2 grade.Measure and adopt Static Volumetric Method and weighing method.Within the scope of intermediate flow, repeated standard error is less than 1.2 × 10
-4.The total error of this device is < 5 × 10
-4, its degree of confidence is 99%.
In addition, FLOMET company of Hungary is using coriolis mass flowmeters as standard scale, obtain the repeatability being better than 0.01%, Brazil has built one and has applied mechanically the water flow standard apparatus that standard scale made by three turbo flow meters, also have France and Norway etc. also to build test and the measuring apparatus of certain scale, carry out the test and study of calibration technique aspect.These countries technically more adopts closed loop thermostatic control, and control system mainly relies on manual operation, and manual step is more, software interface uses dos operating system, although technology comparative maturity, man machine operation interface is friendly not, is unfavorable for current fast pace, high efficiency production procedure.What generally adopt " KingView " to be industrial control software in recent years is automatic to verification system, improves work efficiency.
Domestic development status:
The work that China carries out flow measurement technology in modern age aspect is more late, early stage required flow instrument is all from external import, until just there is the domestic meter manufactured by brilliance precision machinery factory (Guanghua Instrument and Meter Plant predecessor) in middle 1930s, the differential pressure type flowmeter that the fifties, You Liaoxincheng instrucment and meter plant developed, the sixties in 20th century starts there has been the domestic product such as turbo flow meter and electromagnetic flowmeter.It is complete that the instrument and meter industry of present China has formed class variety protection, has certain technical foundation and production-scale industrial system, become Asia second instrument and meter producing country except Japan.
At present, China satisfies the demand substantially about the means of liquid flow measurement, but corresponding standard set-up technical merit is also unsatisfactory, cause the specification of China's existing flow measurement product, accuracy and reliability still can not meet the demand in some market domestic, some novel flowmeters, as the technical merit of turbo flow meter, vortex precession flowmeter, fluidic flowmeter, ultrasonic flow meter, coriolis mass flowmeters etc. and international most advanced level also have larger gap.Wherein the meter proof research of the domestic level that is in a leading position is as follows:
A, national water Large flow station are the maximum flow instrument test bases of country that government investment is set up.This test satellite location flux experiment room has permanent head Static Volumetric Method water flow standard apparatus the biggest in the world, flow range: (200 ~ 16000) m
3/ h; Class of accuracy is 0.1 grade.
B, quality technical supervision detect delay place, Zhejiang Province 1993 are merged by Zhejiang Measure Technology Inst. at that time and Zhejiang Province's product quality inspection to be formed, main checkout equipment has the Static Water flow standard device of nominal below bore 300mm at present, and what device adopted is volumetric method.
C, Shanghai Ai Mosheng process control company limited have a set of high-precision standard calibrating device, this device adopts the method for standard table flow calibrating device of series connection two Coriolis flowmeter modes, and the best measurement capability of device still can reach 0.013%(mass-flow measurement in the presence of a harsh environment) or the test of 0.020%(volumetric flow rate).
D, Beijing Measurement Test Institute have developed a set of water flow standard calibrating installation voluntarily, and adopt volumetric method flow standard device, this measurement device scope is 4-1200m
3/ h, accuracy reaches ± and 0.05%, the demarcation of whole standard set-up, data acquisition and data processing complete all automatically, occupy first place at home.
The importance of flow rate test is self-evident.In order to meet the needs of different fluid flow rate test, various flowmeter is constantly developed and is released.Along with improving constantly of requiring flow accuracy, the calibration system of flow meter it is also proposed higher requirement.
Summary of the invention
The present invention devises a kind of microminiature hand-hold ultrasonic heat flow measurement mechanism, its technical matters solved is that current existing Flow Meter's Demarcation many utilizations volumetric method flow standard device is demarcated, this volumetric method is by temperature on the one hand, the impact of pressure is larger, necessary correction must be carried out according to real account working environment to calibration result in calibration process, thus affect stated accuracy, on the other hand, the highest during the stated accuracy of Static Volumetric Method, but apply in actual on-line proving work, this mode is unpractical, and static method length consuming time, be not easy to realize robotization.
In order to solve the technical matters of above-mentioned existence, present invention employs following scheme:
A kind of microminiature hand-hold ultrasonic heat flow measurement mechanism, comprise ultrasonic transceiver module, liquid measure module, temperature-measuring module, ARM controller, LCD MODULE, input through keyboard module, bluetooth serial ports module and electric power management circuit, it is characterized in that:
Ultrasonic transceiver module comprises the sensor probe (31) of upstream, the sensor probe (32) in downstream and ultrasound wave transmission and reception circuit, the sensor probe (31) of upstream and the sensor probe (32) in downstream are arranged on tested pipeline (1) outer wall, above-mentioned three forms the upstream and downstream ultrasonic transmission/reception loop of synchronism switching and full symmetric design, there is high squelch performance, reduce the flow velocity static drift that circuit is introduced;
Temperature-measuring module comprises sensor for measuring temperature and metering circuit, the input impedance of sensor for measuring temperature and temperature correlation, temperature is different, the input impedance of temp probe also sends change, measured the input impedance of temperature sensor by impulse method, also just can measure the temperature of liquid;
Liquid measure module comprises employing MSP430 controller and CPLD logic control circuit, and real-time follow-up and the signal received from ultrasonic transceiver module and temperature-measuring module transmission, stablize the intensity of ultrasound wave Received signal strength, detect the quality of Received signal strength; An output port of liquid measure module by ARM controller respectively with LCD MODULE, input through keyboard module and bluetooth serial ports model calling; Another output port of liquid measure module is connected with OCT output module; The fluid physics amount that fluid measurement module is measured, gives OCT output module by the mode of serial communication data, and OCT output module converts current analog physical quantity to digital physical quantity and exports;
Electric power management circuit inputs the voltage source of the exportable various low noise of 12V direct voltage source for each functional module of equipment and circuit by outside.
Further, sensor probe adopts multiple different ultrasonic frequency work, and wherein, low frequency is applicable to large diameter pipeline, and intermediate frequency is applicable to common comparatively extra heavy pipe road, and high frequency is then applicable to the pipeline of pipe with small pipe diameter.
Further, described measurement mechanism adopts multilayer board to make, and makes mimic channel and the effective signal isolation of digital circuit, reduces digital circuit noise receives sensitive circuit elements impact on simulation, improve the quality of Received signal strength.
Further, electric power management circuit also comprises battery charger, and battery charger detects the working condition of internal rechargeable battery, upgrades the duty of battery.
Further, the sensor probe (31) of described upstream and the sensor probe (32) in described downstream are arranged on sensor stand (3), and sensor stand (3) is fixed on tested pipeline (1).
This microminiature hand-hold ultrasonic heat flow measurement mechanism compared with prior art, has following beneficial effect:
(1) the present invention adopts the control circuit of ultrasonic transmission/reception symmetry, further reduces the zero point drift of ultrasonic measurement, optimizes the precision of system simultaneously.
(2) the present invention is by selecting frequency of operation, effectively decreases the interference of the ultrasound wave short-circuit signal from tube wall.
(3) the present invention adopts multilayer board to make, and makes mimic channel and the effective signal isolation of digital circuit, reduces digital circuit noise receives sensitive circuit elements impact on simulation, improve the quality of Received signal strength.
(4) the present invention adopts the design of ultrasound wave received signal quality intelligent-tracking, and user can check the quality of ultrasonic signal intuitively by software interface, and correctly whether prompting user pop one's head in and to install, and can guarantee the quality of ultrasound wave Received signal strength further.
Accompanying drawing explanation
Fig. 1: the circuit side connector frame schematic diagram of microminiature hand-hold ultrasonic heat flow measurement mechanism of the present invention.
Fig. 2: the connection diagram of microminiature hand-hold ultrasonic heat flow measurement mechanism of the present invention and measuring object.
Description of reference numerals:
1-tested pipeline; 2-microminiature hand-hold ultrasonic heat flow measurement mechanism; 3-sensor stand; The sensor probe of 31-upstream; The sensor probe in 32-downstream.
Embodiment
Below in conjunction with Fig. 1 and Fig. 2, the present invention will be further described:
A kind of microminiature hand-hold ultrasonic heat flow measurement mechanism, comprises ultrasonic transceiver module, liquid measure module, temperature-measuring module, ARM controller, LCD MODULE, input through keyboard module, bluetooth serial ports module and electric power management circuit.Ultrasonic transceiver module comprises the sensor probe 31 of upstream, the sensor probe 32 in downstream and ultrasound wave transmission and reception circuit, the sensor probe 31 of upstream and the sensor probe 32 in downstream are arranged on tested pipeline 1 outer wall, above-mentioned three forms the upstream and downstream ultrasonic transmission/reception loop of synchronism switching and full symmetric design, there is high squelch performance, reduce the flow velocity static drift that circuit is introduced;
Temperature-measuring module comprises sensor for measuring temperature and metering circuit, the input impedance of sensor for measuring temperature and temperature correlation, temperature is different, the input impedance of temp probe also sends change, measured the input impedance of temperature sensor by impulse method, also just can measure the temperature of liquid;
Liquid measure module comprises employing MSP430 controller and CPLD logic control circuit, and real-time follow-up and the signal received from ultrasonic transceiver module and temperature-measuring module transmission, stablize the intensity of ultrasound wave Received signal strength, detect the quality of Received signal strength; An output port of liquid measure module by ARM controller respectively with LCD MODULE, input through keyboard module and bluetooth serial ports model calling; Another output port of liquid measure module is connected with OCT output module; The fluid physics amount that fluid measurement module is measured, gives OCT output module by the mode of serial communication data, and OCT output module converts current analog physical quantity to digital physical quantity and exports;
Electric power management circuit inputs the voltage source of the exportable various low noise of 12V direct voltage source for each functional module of equipment and circuit by outside.
Sensor probe adopts multiple different ultrasonic frequency work, and wherein, low frequency is applicable to large diameter pipeline, and intermediate frequency is applicable to common comparatively extra heavy pipe road, and high frequency is then applicable to the pipeline of pipe with small pipe diameter.
Described measurement mechanism adopts multilayer board to make, and makes mimic channel and the effective signal isolation of digital circuit, reduces digital circuit noise receives sensitive circuit elements impact on simulation, improve the quality of Received signal strength.
Electric power management circuit also comprises battery charger, and battery charger detects the working condition of internal rechargeable battery, upgrades the duty of battery.
As shown in Figure 2, the sensor probe 31 of upstream and the sensor probe 32 in described downstream are arranged on sensor stand 3, and sensor stand 3 is fixed on tested pipeline 1.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious realization of the present invention is not subject to the restrictions described above; as long as have employed the various improvement that method of the present invention is conceived and technical scheme is carried out; or design of the present invention and technical scheme directly applied to other occasion, all in protection scope of the present invention without to improve.
Claims (5)
1. a microminiature hand-hold ultrasonic heat flow measurement mechanism, comprise ultrasonic transceiver module, liquid measure module, temperature-measuring module, ARM controller, LCD MODULE, input through keyboard module, bluetooth serial ports module and electric power management circuit, it is characterized in that:
Ultrasonic transceiver module comprises the sensor probe (31) of upstream, the sensor probe (32) in downstream and ultrasound wave transmission and reception circuit, the sensor probe (31) of upstream and the sensor probe (32) in downstream are arranged on tested pipeline (1) outer wall, above-mentioned three forms the upstream and downstream ultrasonic transmission/reception loop of synchronism switching and full symmetric design, there is high squelch performance, reduce the flow velocity static drift that circuit is introduced;
Temperature-measuring module comprises sensor for measuring temperature and metering circuit, the input impedance of sensor for measuring temperature and temperature correlation, temperature is different, the input impedance of temp probe also sends change, measured the input impedance of temperature sensor by impulse method, also just can measure the temperature of liquid;
Liquid measure module comprises employing MSP430 controller and CPLD logic control circuit, and real-time follow-up and the signal received from ultrasonic transceiver module and temperature-measuring module transmission, stablize the intensity of ultrasound wave Received signal strength, detect the quality of Received signal strength; An output port of liquid measure module by ARM controller respectively with LCD MODULE, input through keyboard module and bluetooth serial ports model calling; Another output port of liquid measure module is connected with OCT output module; The fluid physics amount that fluid measurement module is measured, gives OCT output module by the mode of serial communication data, and OCT output module converts current analog physical quantity to digital physical quantity and exports;
Electric power management circuit inputs the voltage source of the exportable various low noise of 12V direct voltage source for each functional module of equipment and circuit by outside.
2. microminiature hand-hold ultrasonic heat flow measurement mechanism according to claim 1, it is characterized in that: sensor probe adopts multiple different ultrasonic frequency work, wherein, low frequency is applicable to large diameter pipeline, intermediate frequency is applicable to common comparatively extra heavy pipe road, and high frequency is then applicable to the pipeline of pipe with small pipe diameter.
3. microminiature hand-hold ultrasonic heat flow measurement mechanism according to claim 1 or 2, it is characterized in that: described measurement mechanism adopts multilayer board to make, make mimic channel and the effective signal isolation of digital circuit, reduce digital circuit noise receives sensitive circuit elements impact on simulation, improve the quality of Received signal strength.
4. microminiature hand-hold ultrasonic heat flow measurement mechanism according to claim 1, is characterized in that: electric power management circuit also comprises battery charger, and battery charger detects the working condition of internal rechargeable battery, upgrades the duty of battery.
5. according to microminiature hand-hold ultrasonic heat flow measurement mechanism described in any one in claim 1-4, it is characterized in that: the sensor probe (31) of described upstream and the sensor probe (32) in described downstream are arranged on sensor stand (3), and sensor stand (3) is fixed on tested pipeline (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510155578.9A CN104729764A (en) | 2015-04-03 | 2015-04-03 | Ultra-small handheld ultrasonic heat flow measuring device |
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| CN201510155578.9A CN104729764A (en) | 2015-04-03 | 2015-04-03 | Ultra-small handheld ultrasonic heat flow measuring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105333910A (en) * | 2015-10-23 | 2016-02-17 | 浪潮(北京)电子信息产业有限公司 | Flow data acquiring method and terminal based on cloud computing |
| CN105806425A (en) * | 2015-08-28 | 2016-07-27 | 深圳市创新设计研究院 | Liquid measuring instrument, liquid storage device and management system |
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| CN201392255Y (en) * | 2009-04-22 | 2010-01-27 | 山东力创科技有限公司 | Ultrasonic-wave calorimeter integrating measurement of flow rate and temperature |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806425A (en) * | 2015-08-28 | 2016-07-27 | 深圳市创新设计研究院 | Liquid measuring instrument, liquid storage device and management system |
| CN105333910A (en) * | 2015-10-23 | 2016-02-17 | 浪潮(北京)电子信息产业有限公司 | Flow data acquiring method and terminal based on cloud computing |
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Application publication date: 20150624 |