CN204241019U - A kind of level sensing based on ultrasonic attenuation principle and flow monitoring device - Google Patents
A kind of level sensing based on ultrasonic attenuation principle and flow monitoring device Download PDFInfo
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- CN204241019U CN204241019U CN201420415510.0U CN201420415510U CN204241019U CN 204241019 U CN204241019 U CN 204241019U CN 201420415510 U CN201420415510 U CN 201420415510U CN 204241019 U CN204241019 U CN 204241019U
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Abstract
The utility model patent discloses a kind of level sensing based on ultrasonic attenuation principle and flow monitoring device, comprises pick-up unit, frame, control system and container etc.The contact-free level being applicable to closed container detects and flow monitoring.The characteristic that the technique effect of the utility model patent is to utilize ultrasound wave to pass different material exists differential declines rate, the method that the attenuation rate of diverse location is compared is found out to the liquid-gas interface position in closed container thus determined the relative height of liquid level and closed container, realizes the effect of level detection.The liquid volume change in closed container can be calculated according to the speed of liquid level change and the cross-sectional area of known vessel, namely realize flow monitoring.In testing process, pick-up unit, therefore can the container of compatible more sizes without the need to contacting with fluid to be measured with container, to fluid to be measured also without any pollution.
Description
Technical field
The utility model relates to a kind of level sensing based on ultrasonic attenuation principle and flow monitoring device.
Background technology
At present, the method for level sensing mainly contains mechanical type floating drum method, ultrasonic interface meter method for reflection, capacitance method, electric-resistivity method and photoelectric detecting method etc.
Mechanical type floating drum method be utilize hollow pontoon in water buoyancy to calculate the height of liquid level.Capacitance method or electric-resistivity method are by electrode and fluid to be measured conducting, measure the unit for electrical property parameters of fluid to be measured.Above method, due to needs and liquid comes into contact, easily causes liquid contamination.
Ultrasonic interface meter method for reflection is generally arranged on above vessel port, and the distance of ultrasonic transmitter-receiver and container bottom is known parameters.Ultrasound wave transmits to container bottom, occurs to launch and transmission (or refraction) when running into liquid-gas interface, and ultrasonic transmitter-receiver receives the distance that reflection wave calculates ultrasonic transmitter-receiver and liquid-gas interface, thus draws liquid level.Also have ultrasonic interface meter method for reflection ultrasonic transmitter-receiver being placed on other positions at present, its principle is still the same.This kind of mode is widely used in and tun at present, is not suitable for the closed vessel liquid level comparing miniaturization and detects.
Photoelectric detecting method arranges infrared transmitter and receiver in the both sides of transparent vessel, utilizes infrared signal detecting liquid level position through liquid with through the refractive index difference of gas.This kind of method is closest to a kind of application mode of the present utility model, but the transparency of photoelectric detecting method to container and liquid has higher requirement, therefore poor to the compatibility of container also fluid to be measured.
Utility model content
In order to overcome the technical matters of the level sensing inconvenience of current small-sized closed container, the utility model provides a kind of applying flexible, safe and reliable and the compatible level sensing based on ultrasonic attenuation principle by force and flow monitoring device.
In order to realize above-mentioned technical purpose, the technical solution of the utility model is: a kind of level sensing based on ultrasonic attenuation principle and flow monitoring device, comprise pick-up unit, frame, control system and container, described pick-up unit and container are arranged in frame respectively, and described control system to be fixed in frame and to communicate to connect frame and pick-up unit respectively;
Described pick-up unit comprises Bracket for Inspection, ultrasonic generator and ultrasonic receiver, described Bracket for Inspection is the U-shaped support being provided with two parallel support arms, ultrasonic generator and ultrasonic receiver are individually fixed in the inner side of two support arms of support and are parallelly oppositely arranged, Bracket for Inspection level be arranged in frame;
Described frame comprises frame body, pan straddle, pick-up unit vertical motion module and pick-up unit location sensitive module, described pan straddle is arranged at the top of frame body and makes between its two support arms being in Bracket for Inspection for suspending container in midair, described pick-up unit vertical motion module to be arranged in frame body and to connect Bracket for Inspection and moves to drive its in the vertical direction, and described pick-up unit location sensitive module is installed on Bracket for Inspection rear portion and for detecting Bracket for Inspection present position;
Described control system comprises control circuit, and described control circuit communicates to connect with ultrasonic generator, ultrasonic receiver, pick-up unit vertical motion module and pick-up unit location sensitive module respectively;
Described container is by between vertical two parallel leg being suspended to Bracket for Inspection of pan straddle, and container is provided with a liquid outlet and a gas access.
Described device, described Bracket for Inspection is also provided with a scale directly perceived, and the inner side that scale directly perceived is fixed on Bracket for Inspection is in container rear and identical with the relative horizontal position of ultrasonic receiver with ultrasonic generator.
Described device, described scale directly perceived is made up of self-emissive light source, and described pick-up unit vertical motion module is screw motion module, and described pick-up unit location sensitive module is grating scale module.
Described device, described control circuit is any one in single-chip microcomputer, industrial computer, FPGA, PLC.
Technique effect of the present utility model is, by device of the present utility model, be applicable to level sensing and the flow monitoring of medium and small container, pick-up unit is without the need to directly contacting with tested container with measured matter, avoid the pollution of measured matter, also can adapt to the container of various shape and material.
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model device;
Fig. 2 is the utility model device structure schematic diagram;
Fig. 3 is the positive viewing angle constructions schematic diagram of the utility model;
Fig. 4 is the utility model depression angle structural representation;
Fig. 5 is the utility model side-looking angle detecting device movement position schematic diagram;
Fig. 6 is the utility model detection method schematic diagram, and wherein (a) is on liquid level for pick-up unit, and (b) is under liquid level for pick-up unit;
Fig. 7 is the utility model ultrasound signal path schematic diagram;
Wherein, 10 gases, 51 that be pick-up unit, 11 be Bracket for Inspection, 12 be ultrasonic generator, 13 be ultrasonic receiver, 14 be scale directly perceived, 21 be pan straddle, 22 be pick-up unit vertical motion module, 23 be pick-up unit location sensitive module, 30 be control system, 40 to be container, 50 be in the container liquid that to be ultrasound examination plane, 52 be in container.
Embodiment
Ultrasonic Detection principle of the present utility model is: ultrasonic generator produces ultrasound wave through gas (air) → solid (chamber wall) → liquid or gas (liquid in container or gas) → solid (chamber wall) → gas (air) until ultrasonic receiver.Hyperacoustic transmission signal is received, the signal namely after overdamping by ultrasonic receiver.The Signal transmissions that ultrasonic receiver receives is to control system.
See Fig. 1-Fig. 7, the present embodiment comprises pick-up unit, frame, control system and container, and pick-up unit and container are arranged in frame respectively, and control system to be fixed in frame and to communicate to connect frame and pick-up unit respectively;
Pick-up unit comprises Bracket for Inspection, ultrasonic generator and ultrasonic receiver, Bracket for Inspection is the U-shaped support being provided with two parallel support arms, ultrasonic generator and ultrasonic receiver are individually fixed in the inner side of two support arms of support and are parallelly oppositely arranged, Bracket for Inspection level be arranged in frame;
Frame comprises frame body, pan straddle, pick-up unit vertical motion module and pick-up unit location sensitive module, pan straddle is arranged at the top of frame body and makes between its two support arms being in Bracket for Inspection for suspending container in midair, pick-up unit vertical motion module to be arranged in frame body and to connect Bracket for Inspection and moves to drive its in the vertical direction, and pick-up unit location sensitive module is installed on Bracket for Inspection rear portion and for detecting Bracket for Inspection present position;
Control system comprises control circuit, and control circuit communicates to connect with ultrasonic generator, ultrasonic receiver, pick-up unit vertical motion module and pick-up unit location sensitive module respectively;
Container is by between vertical two parallel leg being suspended to Bracket for Inspection of pan straddle, and container is provided with a liquid outlet and a gas access.
Bracket for Inspection is also provided with a scale directly perceived, the inner side that scale directly perceived is fixed on Bracket for Inspection is in container rear and identical with the relative horizontal position of ultrasonic receiver with ultrasonic generator.
Scale directly perceived is made up of self-emissive light source, and pick-up unit vertical motion module is screw motion module, and pick-up unit location sensitive module is grating scale module.
Control circuit is any one in single-chip microcomputer, industrial computer, FPGA, PLC.
Make principle to the utility model method part below to explain: when not starting to detect, namely during original state, all volume is liquid or a part of volume in container be liquid another part volume is gas.Container is fixed on pan straddle, and pan straddle makes vertical direction and the ultrasound examination plane orthogonal of container.Pick-up unit moves downward lower end extreme position from upper end extreme position in the vertical direction with motion module, then gets back to upper end extreme position.In the process that pick-up unit vertical direction moves up and down, the signal parameter received by ultrasonic receiver and pick-up unit location sensitive module confirm the particular location one_to_one corresponding at ultrasonic receiver place.This stage is first time scanning.
When the liquid in container flows out from liquid outlet, gas also enters in container by gas access, and the liquid in container reduces, gas increases, and the liquid-gas interface in container moves below vertical direction.At this moment pick-up unit moves down from upper end extreme position, and compares to the parameter obtained during first time scanning.Because the velocity of propagation of ultrasonic signal in gas and liquid is different, above pick-up unit moves new liquid-gas interface during a certain regional location, when the signal parameter that ultrasonic receiver receives scanned with first time, larger difference can be produced at the signal of this regional location.Pick-up unit continues to move down, and becomes again again and scans phase with first time when moving to signal parameter that ultrasonic receiver receives and stop simultaneously.Ultrasonic receiver receive scan with first time time identical or close signal parameter moment corresponding to position be the position of current liquid-gas interface, this completes the location to current fluid level.
When needs tracer liquid flow, behind the location that only need complete current fluid level at pick-up unit, move down a predeterminable range again, then stop motion, when liquid level constantly declines, until ultrasonic signal becomes from when scanning different for the first time, show that liquid level has dropped to the position of pick-up unit, so record this time, subtract each other with time when liquid level is located before again, the time that liquid level decline predeterminable range spends can be obtained, length, width and height due to container are known, the liquid volume held in predeterminable range can be obtained, namely the time that liquid volume spends divided by liquid level decline predeterminable range obtain fluid flow, and this predeterminable range can detect needs to adjust according to reality, be worth less, corresponding accuracy of detection is then higher, scope can be taken at 1/2 ~ 1/10 of container overall height
15.Meanwhile, the scale directly perceived on pick-up unit is LED lamp bar, due to scale directly perceived along with pick-up unit moves, so just the position of liquid-gas interface can be made to check from naked eyes more directly perceived.
Control system can calculate according to liquid-gas interface velocity of displacement and known vessel xsect the flow that liquid flows out, and Monitoring Data is sent to designated equipment.
Claims (4)
1. the level sensing based on ultrasonic attenuation principle and flow monitoring device, it is characterized in that, comprise pick-up unit, frame, control system and container, described pick-up unit and container are arranged in frame respectively, and described control system to be fixed in frame and to communicate to connect frame and pick-up unit respectively;
Described pick-up unit comprises Bracket for Inspection, ultrasonic generator and ultrasonic receiver, described Bracket for Inspection is the U-shaped support being provided with two parallel support arms, ultrasonic generator and ultrasonic receiver are individually fixed in the inner side of two support arms of support and are parallelly oppositely arranged, Bracket for Inspection level be arranged in frame;
Described frame comprises frame body, pan straddle, pick-up unit vertical motion module and pick-up unit location sensitive module, described pan straddle is arranged at the top of frame body and makes between its two support arms being in Bracket for Inspection for suspending container in midair, described pick-up unit vertical motion module to be arranged in frame body and to connect Bracket for Inspection and moves to drive its in the vertical direction, and described pick-up unit location sensitive module is installed on Bracket for Inspection rear portion and for detecting Bracket for Inspection present position;
Described control system comprises control circuit, and described control circuit communicates to connect with ultrasonic generator, ultrasonic receiver, pick-up unit vertical motion module and pick-up unit location sensitive module respectively;
Described container is by between vertical two parallel leg being suspended to Bracket for Inspection of pan straddle, and container is provided with a liquid outlet and a gas access.
2. device according to claim 1, it is characterized in that, described Bracket for Inspection is also provided with a scale directly perceived, the inner side that scale directly perceived is fixed on Bracket for Inspection is in container rear and identical with the relative horizontal position of ultrasonic receiver with ultrasonic generator.
3. device according to claim 2, is characterized in that, described scale directly perceived is made up of self-emissive light source, and described pick-up unit vertical motion module is screw motion module, and described pick-up unit location sensitive module is grating scale module.
4. device according to claim 1, is characterized in that, described control circuit is any one in single-chip microcomputer, industrial computer, FPGA, PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420415510.0U CN204241019U (en) | 2014-07-25 | 2014-07-25 | A kind of level sensing based on ultrasonic attenuation principle and flow monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420415510.0U CN204241019U (en) | 2014-07-25 | 2014-07-25 | A kind of level sensing based on ultrasonic attenuation principle and flow monitoring device |
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| Publication Number | Publication Date |
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| CN204241019U true CN204241019U (en) | 2015-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420415510.0U Withdrawn - After Issue CN204241019U (en) | 2014-07-25 | 2014-07-25 | A kind of level sensing based on ultrasonic attenuation principle and flow monitoring device |
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| CN (1) | CN204241019U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104165654A (en) * | 2014-07-25 | 2014-11-26 | 长城信息产业股份有限公司 | Liquid level detection and flow monitoring apparatus and method based on supersonic wave attenuation principle |
| CN107782872A (en) * | 2017-10-25 | 2018-03-09 | 中国矿业大学 | A kind of mechanical light sensation Combinational redundancy formula water quality monitor metering device |
| CN107782872B (en) * | 2017-10-25 | 2024-05-28 | 中国矿业大学 | Metering device for mechanical light-sensing combined redundant water quality monitor |
-
2014
- 2014-07-25 CN CN201420415510.0U patent/CN204241019U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104165654A (en) * | 2014-07-25 | 2014-11-26 | 长城信息产业股份有限公司 | Liquid level detection and flow monitoring apparatus and method based on supersonic wave attenuation principle |
| CN104165654B (en) * | 2014-07-25 | 2017-04-19 | 长城信息产业股份有限公司 | Liquid level detection and flow monitoring apparatus and method based on supersonic wave attenuation principle |
| CN107782872A (en) * | 2017-10-25 | 2018-03-09 | 中国矿业大学 | A kind of mechanical light sensation Combinational redundancy formula water quality monitor metering device |
| CN107782872B (en) * | 2017-10-25 | 2024-05-28 | 中国矿业大学 | Metering device for mechanical light-sensing combined redundant water quality monitor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150401 Effective date of abandoning: 20170419 |
|
| AV01 | Patent right actively abandoned |