CN211292956U - Portable ultrasonic wave open channel water level automatic tracking current surveying device - Google Patents

Portable ultrasonic wave open channel water level automatic tracking current surveying device Download PDF

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CN211292956U
CN211292956U CN201922320472.6U CN201922320472U CN211292956U CN 211292956 U CN211292956 U CN 211292956U CN 201922320472 U CN201922320472 U CN 201922320472U CN 211292956 U CN211292956 U CN 211292956U
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ultrasonic
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flow
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周义仁
马娟娟
李治勤
张茜
张雪兰
孙西欢
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Taiyuan University of Technology
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Taiyuan University of Technology
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Abstract

A portable ultrasonic automatic tracking flow measurement device for the water level of an open channel adopts European standard aluminum profiles, a liquid level ultrasonic sensor is arranged at the top end of the device to measure the water level height of the open channel, double-axis linear guide mechanical aluminum profiles are arranged in guide rails, and support rods are fixedly connected with the guide rails through fixed backing plates; the built-in double-axis linear guide rail is internally provided with a sliding block and a screw rod, the sliding block is connected with a steering engine, the sliding block and the steering engine are driven by a stepping motor arranged on the screw rod to slide up and down on the screw rod, the steering engine is connected with a measuring rod and controls the rotating angle of the measuring rod, and two ends of the measuring rod are provided with ultrasonic probes for 360-degree vertical plane rotation measurement; the device has the advantages of simple structure, convenient carrying and high measurement precision, is widely suitable for flow measurement of open channel channels, and has important practical significance for water conservation in irrigation areas.

Description

Portable ultrasonic wave open channel water level automatic tracking current surveying device
Technical Field
The utility model relates to an open channel ultrasonic wave current surveying device, especially an open channel ultrasonic wave current surveying device based on ultrasonic wave time difference method.
Background
The prior art is as follows: the utility model discloses a "ultrasonic radar current surveying system" that publication number is CN206515468U discloses, including the central station and with the radar station of central station wireless communication, the radar station includes monitoring room, radar support, radar probe, is equipped with acquisition controller and power, the wireless transmission module who is connected with it in the monitoring room, the radar support is located the water top of monitoring, a plurality of radar probes are fixed on radar support and are to the surface of water transmission ultrasonic wave of upstream water, each radar probe all is connected with the acquisition controller in the monitoring room; the flow measuring system realizes non-contact on-line measurement, has high measuring speed, can ensure the safety of hydrological testing technicians and reduce the loss of measuring instruments, but has high manufacturing cost, can not be carried and used, can only measure the flow of a fixed water area, and is not suitable for large-area popularization and use.
The prior art is as follows: the flow measuring device has simple structure and low cost, but when in practical popularization and application, because the flow meter needs to adopt a differential pressure meter to measure the upstream and downstream pressure, and the differential pressure meter is connected with a buffer tube of a main pipeline of the flow meter to have certain requirements on the sediment content of irrigation water flow; because the water flow contains impurities, once the filter screen in front of the inlet of the buffer tube is blocked, a large error of reading pressure difference can be caused, so the device has low flow measurement precision, and the water flow of fixed water depth can not be accurately measured.
The prior art is as follows: 36-38, it is a new kind of water measuring equipment, utilize Venturi tube as the main pipe to carry on the water-flow, mount the branch pipe on Venturi tube, the branch pipe inlet is installed on main pipe or connected with upstream water, the outlet is installed on choke, mount the water gauge on the branch pipe, the apparatus simple in construction, the fabrication cost is low, the permanent pressure loss is small, the precision is sufficient and stable, have long performance life, but the throttling element Venturi tube inside makes the difficulty large, is not suitable for the application and popularization.
The prior art is as follows: buying, lifting, meat cumin, channel on-line flow measuring system design [ J ] based on wireless communication technology, water conservancy technical supervision, 2016,24(03):10-12, channel on-line flow measuring system based on wireless communication technology, which comprises a pressure type flow meter, a stepping motor, a mechanical transmission device, a singlechip and a computer, wherein the computer controls the singlechip through wireless communication technology according to a flow velocity area method, the singlechip is connected with the stepping motor and controls the stepping motor to move in the horizontal direction of the channel section, the stepping motor is connected with a horizontal mechanical transmission mechanism and controls the movement and lifting of the pressure type flow measuring device, the flow velocity of different measuring lines of the section can be measured by controlling the movement of the flow measuring device through the stepping motor, the flow velocity of the flow measuring section can be further obtained, finally, data is transmitted to the computer, the flow of the flow measuring section can be obtained through calculation, and the automation degree of the flow measuring system is high, the flow measuring device has good popularization and application values, but the flow measuring device is large and is not easy to carry.
Therefore, the research and development of a flow measuring device which has high automation degree, accurate flow measurement, low price, stable performance and convenient carrying is an urgent need for flow velocity measurement in civil irrigation areas.
Disclosure of Invention
The to-be-solved technical problem of the utility model is current civilian irrigated area current surveying device, and the structure is bulky, and the operation is inconvenient, is difficult for carrying, and the civilian irrigated area discharge problem of unable accurate measurement, its purpose provides a portable ultrasonic wave open channel water level automatic tracking current surveying device.
In order to solve the problem, the utility model adopts the following technical scheme.
A flow measuring device for a portable ultrasonic open channel water level flow measuring method comprises a screw rod, a stepping motor, an ultrasonic probe, a guide rail, a liquid level ultrasonic sensor, a steering engine, a sliding block, a supporting rod, a measuring rod and a fixed base plate; the method is characterized in that:
the supporting rod is an aluminum profile, and a liquid level ultrasonic sensor is mounted at the top end of the supporting rod to measure the water level height of the open channel; the guide rail is internally provided with a double-axis linear guide rail mechanical aluminum profile, and the support rod is fixedly connected with the guide rail through a fixed base plate; the built-in double-axis linear guide rail is provided with a sliding block and a screw rod, the sliding block is connected with a steering engine, the sliding block and the steering engine are driven by a stepping motor arranged on the screw rod to slide up and down on the screw rod, the steering engine is connected with a measuring rod and controls the rotating angle of the measuring rod, and two ends of the measuring rod are provided with ultrasonic probes for 360-degree vertical plane rotation measurement;
during the measurement, liquid level ultrasonic sensor measures open channel water level height earlier, and ultrasonic sensor sends ultrasonic pulse signal by the probe, meets measured medium surface and will reflect when pulse signal, will convert it into the signal of telecommunication when same probe received the reflection echo, alright obtain this moment from launching to the interval time of receiving ultrasonic pulse. The distance between the probe and the water surface can be measured because the ultrasonic pulse propagates in the air at the sound velocity and the propagation time of the ultrasonic pulse is measured
Figure DEST_PATH_404640DEST_PATH_IMAGE001
. Knowing the distance of the probe to the water bottom
Figure DEST_PATH_184377DEST_PATH_IMAGE002
By height difference
Figure DEST_PATH_DEST_PATH_IMAGE003
Calculating to obtain a water level;
the measuring rod slides up and down through the sliding block and rotates 360 degrees under the driving of the steering engine, the intelligent controller controls the position of the ultrasonic probe according to the height of the water level, the ultrasonic probe is respectively arranged on the water surface and the water bottom, the ultrasonic waves are transmitted and received alternately in opposite directions, the acquired data are transmitted to the monitoring equipment in a wireless mode, the time difference exists between the forward flow and the backward flow propagation of the sound waves at the same distance, the flow rate is obtained according to the time difference principle, and the channel flow is obtained according to the flow rate area method.
The utility model discloses there is following further characteristic scheme.
A flow measuring device for a portable ultrasonic open channel water level flow measuring method is characterized in that: the measuring rod is a thin rod made of stainless steel, aluminum alloy or graphene.
A flow measuring device for a portable ultrasonic open channel water level flow measuring method is characterized in that: the rotating speed of the stepping motor is 25rad/s or self-adjusting.
The technical scheme of the portable ultrasonic wave open channel water level automatic tracking flow measuring device provided by the utility model is an economical and practical final channel flow measuring device with high measuring precision and simple structure, and solves the limitations that the existing flow measuring device can not record in real time, has high labor intensity, is difficult to operate and the like; the design organically combines the flow measuring technology and the automatic control technology, adopts the ultrasonic sensor to monitor the flow of the open channel in real time, has little influence on the external environment, is easy to install and convenient to operate, can measure along with the band, is not limited by space, can solve the defects of the water measuring method of the final-stage channel to a certain extent, and has important practical significance for water conservation and sustainable development of the civil irrigation area.
Drawings
Fig. 1 is a schematic structural view of the flow measuring device of the present invention.
Fig. 2 is a schematic diagram of the ultrasonic time difference method flow measurement of the present invention.
In the figure: 1: a screw rod; 2: a stepping motor; 3: a measuring rod; 4: a steering engine; 5: a slider; 6: an ultrasonic probe; 7: a liquid level ultrasonic sensor; 8: a support bar; 9: fixing the base plate; 10: a guide rail.
Detailed Description
The following provides a more detailed description of the embodiments of the present invention.
As attached figure 1 and attached figure 2, implement the aforesaid the utility model provides a portable ultrasonic wave open channel water level automatic current surveying device, including lead screw 1, step motor 2, measuring stick 3, steering wheel 4, slider 5, ultrasonic transducer 6, liquid level ultrasonic sensor 7, bracing piece 8, fixed backing plate 9, guide rail 10, intelligent equipment controller and power supply unit.
Wherein, the support bar 8 is fixedly connected with the guide rail 10 through a fixed backing plate 9; the screw rod 1 is connected with the sliding block 5 and is arranged on the guide rail 10, the stepping motor 2 is arranged on the screw rod 1, and the steering engine 4 is connected with the sliding block 5 and slides up and down on the screw rod 1; the measuring rod 3 is connected with a steering engine 4, the ultrasonic probes 6 are fixedly mounted at two ends of the measuring rod 3, the steering engine 4 controls the measuring rod 3 to rotate and realize 360-degree rotation, the measuring rod 3 is driven by the stepping motor 2 to do linear motion on the screw rod 1 and is combined with the screw rod and the screw rod for controlling the position of the ultrasonic probes 6, and the liquid level ultrasonic sensor 7 is mounted at the top end of the supporting rod 8 and used for measuring the water level; the intelligent device controller is used for acquiring data measured by the ultrasonic probe and transmitting the data to the monitoring device in a wireless mode, and the power supply device supplies power to the intelligent device controller.
This contact type flow measuring equipment adopts light stainless steel measuring stick 3 in order to minimize the influence to the rivers state, and this device mainly adopts two ultrasonic transducer, connects through a thin pole, places respectively in surface of water and submarine, and the ultrasonic wave is received in the transmission in turn in opposite directions, and the sound wave must have the time difference in same distance following current and adverse current propagation, obtains the velocity of flow according to the time difference principle, obtains channel flow according to velocity of flow area method again.
Flow measurement principle:
the liquid level ultrasonic sensor firstly measures the water level height of the open channel, the ultrasonic sensor sends out an ultrasonic pulse signal by a probe, when the pulse signal meets the surface of a measured medium for reflection, the same probe receives a reflection echo and converts the reflection echo into an electric signal to obtain the interval time from the emission to the reception of the ultrasonic pulse, and as the ultrasonic pulse is transmitted in the air at the sound velocity and the transmission time of the ultrasonic pulse is measured, the distance from the probe to the water surface can be measured
Figure DEST_PATH_704220DEST_PATH_IMAGE004
Knowing the distance of the probe to the water bottom, by height difference
Figure DEST_PATH_456275DEST_PATH_IMAGE003
Calculating to obtain a water level;
in water flow, sound waves are propagated downstream and upstream at the same distance, time difference exists inevitably, and therefore the portable ultrasonic open channel flow measuring device adopting the time difference method is designed, the flow speed of the water flow causes the ultrasonic propagation time to be different, and therefore the flow speed is obtained after the time difference is measured.
The distance between the two transducers is L, when the ultrasonic water flow measuring device works, the transducer 1 transmits ultrasonic pulses to the transducer 2 along the water flow, and the propagation time of the ultrasonic pulses passing through the L along the water flow is measured
Figure DEST_PATH_DEST_PATH_IMAGE005
The transducer 2 then transmits ultrasonic pulses to the transducer 1 in the reverse direction to measure the propagation time of the reverse water passing through the L
Figure DEST_PATH_465689DEST_PATH_IMAGE006
Figure DEST_PATH_732722DEST_PATH_IMAGE007
Where L is the distance between the two transducers and C is the speed of propagation of the ultrasound in the stationary medium, since V < < C, the above equation is rewritten as:
Figure DEST_PATH_RE-DEST_PATH_IMAGE008
the flow rate is proportional to the time difference between the forward and backward propagation of the ultrasonic waves.
During specific use, arrange the current surveying device in and measure the waters top, the bottom is placed to bracing piece 8, power is turned on, utilize ultrasonic probe 7 to record the liquid level of this surface of water, step motor 2 work this moment, under step motor 2's drive, slider 5 control measuring stick 3 up-and-down motion, steering wheel 4 control measuring stick 3 is rotatory certain angle, make measuring stick 3 with be certain angle along the rivers direction and place, guarantee that ultrasonic probe 6 arranges surface of water and bottom respectively in, according to the difference of liquid level, the position of automatically regulated measuring stick 3, can carry out the measurement of many times different positions.
The analog quantity signal that ultrasonic sensor exported passes through AD conversion and is the digital signal that the singlechip can discern, through the operation of singlechip program, can pass through liquid crystal display with the data of gathering on the one hand and show, and on the other hand can transmit GPRS terminal through communication interface, realizes the on-line monitoring of host computer.
A final-stage channel time-difference method ultrasonic automatic flow measuring device measures liquid level by utilizing an ultrasonic probe, automatically adjusts the position of a measuring rod according to the measured liquid level to enable the measuring rod to rotate by a certain angle, ensures that one probe is on the water surface and the other probe is at the water bottom, and two ultrasonic transducers transmit ultrasonic waves in opposite directions
Figure DEST_PATH_728360DEST_PATH_IMAGE009
The flow is calculated, and the flow measurement precision is greatly improved.
Combine sensor technology and computer technology, the utility model discloses according to ultrasonic wave time difference method principle, utilize ultrasonic sensor and intelligent control ware automatic measure open channel flow, easy operation is applicable to small-size standardized rectangle channel, has realized automatic flow measurement in the true sense to measuring result can realize remote reading and storage through wireless transmission, has certain practical value and spreading value to the automatic flow measurement of standard rectangle channel of the middle-size and small-size irrigated area of china.

Claims (3)

1. A portable ultrasonic automatic water level tracking flow measurement device for an open channel comprises a screw rod, a stepping motor, an ultrasonic probe, a guide rail, a liquid level ultrasonic sensor, a steering engine, a sliding block, a supporting rod, a measuring rod and a fixed base plate; the method is characterized in that:
the supporting rod (8) is an aluminum profile, and the top end of the supporting rod is provided with a liquid level ultrasonic sensor (7) for measuring the water level height of the open channel; the guide rail (10) is a mechanical aluminum profile with a built-in double-axis linear guide rail, and the support rod (8) is fixedly connected with the guide rail (10) through a fixed backing plate (9); a sliding block (5) and a screw rod (1) are arranged on a double-axis linear guide rail (10) arranged in the device, and the sliding block (5) is connected with a steering engine (4); a stepping motor (2) arranged on the screw rod (1) drives a sliding block (5) and a steering engine (4) to slide up and down on the screw rod (1) for measurement; the steering engine (4) is connected with the measuring rod (3) and controls the rotating angle of the measuring rod (3); and ultrasonic probes (6) are arranged at two ends of the measuring rod (3) for 360-degree vertical plane rotation measurement, online monitoring of an upper computer is realized, and according to a time difference method principle and a flow velocity area method, a final program automatically calculates the channel section flow and displays the channel section flow on a liquid crystal display screen.
2. The portable ultrasonic open channel water level automatic tracking flow measuring device of claim 1, characterized in that:
the measuring rod (3) is a thin rod made of stainless steel, aluminum alloy or graphene.
3. The portable ultrasonic open channel water level automatic tracking flow measuring device of claim 1, characterized in that: the rotating speed of the stepping motor (2) is 25rad/s or is self-regulated.
CN201922320472.6U 2019-12-23 2019-12-23 Portable ultrasonic wave open channel water level automatic tracking current surveying device Active CN211292956U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114543903A (en) * 2022-01-28 2022-05-27 水利部水土保持监测中心 Portable torque type flow measuring device and flow measuring method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114543903A (en) * 2022-01-28 2022-05-27 水利部水土保持监测中心 Portable torque type flow measuring device and flow measuring method
CN114543903B (en) * 2022-01-28 2022-11-04 水利部水土保持监测中心 Portable torque type flow measuring device and flow measuring method

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