CN211783654U - Low-cost wireless ultrasonic time difference method flow measurement equipment - Google Patents
Low-cost wireless ultrasonic time difference method flow measurement equipment Download PDFInfo
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- CN211783654U CN211783654U CN201922412611.8U CN201922412611U CN211783654U CN 211783654 U CN211783654 U CN 211783654U CN 201922412611 U CN201922412611 U CN 201922412611U CN 211783654 U CN211783654 U CN 211783654U
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- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 7
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model discloses a low-cost wireless ultrasonic time difference method flow measurement equipment, the time synchronization is realized through satellite time service between the host computer GPS and the corollary equipment of the left bank and the slave computer GPS and the corollary equipment of the right bank, the host computer and the slave computer control respective transducer to send ultrasonic signals to the transducer of the opposite side simultaneously, after the ultrasonic signals are received by the opposite side, the downstream transmission time and the upstream transmission time are calculated respectively; the slave machine sends the transmission time of the ultrasonic waves from the master machine transducer to the slave machine transducer to the master machine through short transmission, the master machine subtracts the self-measured time after receiving the time to obtain the downstream and upstream transmission time difference of the ultrasonic waves, and the water body flow velocity can be calculated according to the transmission speed of the ultrasonic waves in water. The utility model discloses effectively avoided the problem that wired time difference method construction is difficult, the engineering volume is big, especially be applicable to the river course of broad and the river course that has a small amount of ship navigation.
Description
Technical Field
The utility model relates to a wireless time difference method flow measurement equipment, concretely relates to low-cost wireless ultrasonic wave time difference method flow measurement equipment.
Background
The river (open channel) flow monitoring is basic work in the fields of flood control and drought resistance, emergency management, water resource management, ecological management and the like, aims to accurately measure the flow of water flowing through a river (open channel) in real time and provides scientific decision support for flood early warning and forecasting, water pollution forecasting, water quantity scheduling, ecological base flow monitoring and the like.
The river (open channel) flow online monitoring has multiple modes such as H-ADCP flow measurement, time difference method flow measurement, radar surface flow measurement, cable channel current meter flow measurement and the like, the application conditions, the measurement precision, the construction cost and the operation and maintenance cost of different flow measurement modes are different, and an applicable flow measurement scheme is selected according to the monitoring section condition and the system construction requirement in practical application.
The ultrasonic time difference method flow measurement is a flow measurement mode which has the advantages of high flow measurement precision, wide application range, no influence on water flow form, high cost performance and the like in a plurality of flow measurement modes.
The ultrasonic time difference method flow measurement is that two transducers are arranged on two sides of a river channel, a connecting line between the two transducers forms a certain included angle (usually 45 degrees) with a flow velocity direction, and the two transducers emit ultrasonic waves in a time-sharing manner, so that the downstream and upstream propagation speeds of the ultrasonic waves in water are measured. The ultrasonic wave propagates in water in the same forward and backward directions for the same distance, so that time difference exists, and the propagation time difference is related to the flow velocity of the water to be measured, so that the flow velocity of the water can be obtained by measuring the time difference.
According to different connection modes of the transducer and the host, the ultrasonic time difference method flow measurement is divided into a wired time difference method flow measurement and a wireless time difference method flow measurement. As shown in fig. 1.
The main machine of wired time difference method flow measurement is located river course one side, and the transducer of opposite bank need through the built on stilts or lay to main machine one side of cable frame or through the river bottom, to the river course of surface of water broad, the construction is troublesome, the engineering volume is big. For river channels where ships are passing, protection of river-crossing cables is also a problem.
To sum up, the utility model designs a low-cost wireless ultrasonic wave time difference method equipment of surveying current. The cable is not needed to cross the river, the problem of difficult wired construction is solved, and meanwhile, the cost is lowered.
SUMMERY OF THE UTILITY MODEL
To the not enough of existence on the prior art, the utility model aims to provide a low-cost wireless ultrasonic wave time difference method equipment of surveying current, a host computer is placed to river course one side, and this side transducer only is connected to the host computer. A slave is placed on the opposite bank of the river channel, and the opposite-bank transducer is only connected to the slave. Therefore, the problem that cables cross the river does not exist, the problems that the construction is difficult and the engineering quantity is large by a wired time difference method are effectively solved, and the method is particularly suitable for wide river channels and river channels with a small number of ships for navigation.
In order to achieve the above purpose, the present invention is realized by the following technical solution: a low-cost wireless ultrasonic time difference method flow measurement device comprises a left bank device and a right bank device, wherein the left bank device comprises a host, a host transducer, a left bank short transmitter, a left bank GPS and a matched device; the host GPS and the matched equipment of the left bank and the slave GPS and the matched equipment of the right bank realize time synchronization through satellite time service, the host controls the host transducer to send ultrasonic signals to the slave transducer, the slave controls the slave transducer to send ultrasonic signals to the host transducer, and after the opposite side receives the ultrasonic signals, the downstream transmission time and the upstream transmission time are respectively calculated; the slave machine transmits the transmission time of the ultrasonic waves from the master machine transducer to the slave machine transducer to the master machine through the short transmission of the right bank, the master machine subtracts the self-measured time after receiving the transmission time to obtain the downstream and upstream transmission time difference of the ultrasonic waves, and the water flow velocity can be calculated according to the transmission speed of the ultrasonic waves in water.
Preferably, the master machine transducer, the left bank short-distance transmission device, the left bank GPS and the matched equipment are arranged on the left bank, and the slave machine, the slave machine transducer, the right bank short-distance transmission device, the right bank GPS and the matched equipment are arranged on the opposite bank.
Preferably, the host is connected to the host transducer.
Preferably, the slave is connected with the slave transducer.
The utility model has the advantages that:
the utility model discloses the wireless time difference method current surveying host computer of realization, from the computer, sensor and accessories all adopt domestic equipment, about one-point (monophonic) complete set of equipment cost one hundred thousand yuan, compare with the price of millions on the foreign wireless time difference method products such as Quantum, under the river width application scene within 100 meters, have obvious cost advantage and spreading value.
Drawings
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments;
FIG. 1 is a schematic view of a time-difference method of flow measurement;
FIG. 2 is a schematic diagram of the structure of the present invention;
FIG. 3 is a flow chart of data processing according to the present invention;
fig. 4 is an appearance schematic diagram of the present invention.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.
Referring to fig. 2, 3 and 4, the following technical solutions are adopted in the present embodiment: a low-cost wireless ultrasonic time difference method flow measurement device comprises a left bank device and a right bank device, wherein the left bank device comprises a host 1, a host transducer 2, a left bank short transmission 3, a left bank GPS and a matching device 4, and the right bank device comprises a slave 5, a slave transducer 6, a right bank short transmission 7, a right bank GPS and a matching device 8; the left bank GPS and the matched equipment 4 of the host 1 and the right bank GPS and the matched equipment 8 of the slave 5 realize system time synchronization by receiving satellite 9 time service signals, the host 1 controls the host transducer to send ultrasonic signals to the slave transducer, the slave 5 controls the slave transducer to send ultrasonic signals to the host transducer, and after the opposite side receives the ultrasonic signals, the downstream transmission time and the upstream transmission time are respectively calculated; the slave 5 transmits the transmission time of the ultrasonic waves from the master transducer 2 to the slave transducer 6 to the master 1 through the right bank short transmission 7, the master 1 subtracts the self-measured time after receiving the time to obtain the forward-flow and reverse-flow transmission time difference of the ultrasonic waves, and the water flow velocity can be calculated according to the transmission speed of the ultrasonic waves in water.
The main engine 1, the main engine transducer 2, the left bank short transmission 3, the left bank GPS and the corollary equipment 4 are all arranged on the left bank, and the auxiliary engine 5, the auxiliary engine transducer 6, the right bank short transmission 7, the right bank GPS and the corollary equipment 8 are arranged on the opposite bank.
The host 1 is connected with a host transducer 2.
The slave 5 is connected with a slave transducer 6.
The equipment of the embodiment measures the linear flow velocity and the section average flow velocity required in actual work. In order to obtain the relationship between the linear flow velocity and the average flow velocity of the cross section, flow velocity calibration work needs to be carried out to obtain a flow velocity calibration relationship formula. After the linear flow velocity is measured, the linear flow velocity is substituted into a flow velocity rate relation formula, and then the average flow velocity of the cross section can be obtained. The utility model discloses support the water level gauge of various RS485 interfaces and 4~20mA analog quantity interface to insert.
In order to measure the average flow of the cross section, the flow velocity is measured and the water level is measured at the same time, under the condition that the shape of the cross section is certain, different water levels have different cross section water passing areas, and the cross section water passing area can be obtained by measuring the water level. The average flow velocity of the cross section is multiplied by the water passing area of the cross section, and then the average flow of the cross section can be obtained.
The river course of this embodiment has reasonable design, and convenient operation is reliable, and is with low costs, excellent in use effect, can effectively avoid the problem that wired time difference method construction is difficult, the engineering volume is big, is particularly useful for the river course of broad and the river course that has a small amount of ships to navigate.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. The low-cost wireless ultrasonic time difference method flow measurement equipment is characterized by comprising left bank equipment and right bank equipment, wherein the left bank equipment comprises a host (1), a host transducer (2), a left bank short transmitter (3), a left bank GPS and corollary equipment (4), and the right bank equipment comprises a slave (5), a slave transducer (6), a right bank short transmitter (7), a right bank GPS and corollary equipment (8); the left bank GPS and the matched equipment (4) of the host (1) and the right bank GPS and the matched equipment (8) of the slave (5) realize time synchronization through time service of a satellite (9), the host (1) controls the host transducer to send an ultrasonic signal to the slave transducer, the slave (5) controls the slave transducer to send the ultrasonic signal to the host transducer, and after the opposite side receives the ultrasonic signal, downstream transmission time and upstream transmission time are respectively calculated; the slave (5) sends the transmission time of the ultrasonic waves from the master transducer (2) to the slave transducer (6) to the master (1) through the right bank short transmission (7), the master (1) subtracts the self-measured time after receiving the time to obtain the forward and reverse transmission time difference of the ultrasonic waves, and the water flow velocity is calculated according to the transmission speed of the ultrasonic waves in water.
2. The low-cost wireless ultrasonic time difference method flow measurement equipment according to claim 1, wherein the master machine (1), the master machine transducer (2), the left bank short transmitter (3), the left bank GPS and the matched equipment (4) are all arranged on the left bank, and the slave machine (5), the slave machine transducer (6), the right bank short transmitter (7), the right bank GPS and the matched equipment (8) are arranged on the opposite bank.
3. A low cost wireless ultrasonic time difference method flow measuring device according to claim 1, characterized in that the host (1) is connected with a host transducer (2).
4. A low cost wireless ultrasonic time-difference method flow measuring device according to claim 1, characterized in that the slave (5) is connected to a slave transducer (6).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922412611.8U CN211783654U (en) | 2019-12-29 | 2019-12-29 | Low-cost wireless ultrasonic time difference method flow measurement equipment |
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| CN201922412611.8U CN211783654U (en) | 2019-12-29 | 2019-12-29 | Low-cost wireless ultrasonic time difference method flow measurement equipment |
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| CN211783654U true CN211783654U (en) | 2020-10-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113917185A (en) * | 2021-10-22 | 2022-01-11 | 浙江天禹信息科技有限公司 | Acoustic full-section flow meter and working method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113917185A (en) * | 2021-10-22 | 2022-01-11 | 浙江天禹信息科技有限公司 | Acoustic full-section flow meter and working method thereof |
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Address after: No. 733, East Section of Hupan Road, Xinglong Street, Tianfu New Area, China (Sichuan) Pilot Free Trade Zone, Chengdu City, Sichuan Province, 610299, with OL-02-202311003 attached Patentee after: Zhongke Xingtu Yishui (Sichuan) Technology Co.,Ltd. Address before: Room 126, 1f, industrial incubation zone, Enji West Park Industrial Park, No. 1, liangjiadian, Fuwai, Haidian District, Beijing 100142 Patentee before: Yishui Tyco (Beijing) Information Technology Co.,Ltd. |