CN217443383U - A Drainage Pipeline Velocity Measurement Device Based on Terahertz Technology - Google Patents

Abstract

The utility model relates to a flow velocity measurement technical field specifically is a drainage pipe flow velocity measurement device based on terahertz technique now, the power distribution box comprises a box body, the inside of box is provided with measuring mechanism, measuring mechanism includes computer, connector, voltage controlled oscillator, analog-to-digital acquisition controller and wave filter, fixedly connected with baffle on the inner wall of box. Through rotating the threaded rod, make the threaded rod and the thread engagement in the screw thread section of thick bamboo produce thrust, adjust mounting height and inclination according to the installation needs, open circuit switch, supply power for the battery through solar charging panel, make electronic parts circular telegram through the dc-to-ac converter, make the duration reinforcing of device, enlarge the application scope of device simultaneously, the voltage controlled oscillator chip of antenna on the integrated chip is adopted, cooperation lens antenna, can realize the wave beam focusing function, and the gain is improved, terahertz radar velocity of flow monitoring facilities has small, the low power dissipation, non-contact, the high advantage of precision.

Description

A Drainage Pipeline Velocity Measurement Device Based on Terahertz Technology

technical field

The utility model relates to the technical field of flow velocity measurement, in particular to a drainage pipeline flow velocity measurement device based on terahertz technology.

Background technique

The urban underground pipe network drainage system is the "blood vein" of the entire city. Accurately grasp the pipeline water flow conditions and facilitate the formulation of scientific management plans. Terahertz (THz) wave refers to the frequency in the range of 0.1-10THz (wavelength is 3000 ~ 30μm). Electromagnetic waves, which overlap with millimeter waves in the long waveband and infrared light in the short waveband, are the transition zone from macroscopic classical theory to microscopic quantum theory, and also the transition zone from electronics to photonics. Void, the band of terahertz (THz) waves can cover the characteristic spectrum of substances such as semiconductors, plasmas, organisms and biological macromolecules; the use of this band can deepen and expand human understanding of physics, chemistry, astronomy, informatics and life sciences. Recognition of some basic scientific issues.Using terahertz technology to accurately understand the water flow in the pipeline, so it is necessary to set up a drainage pipeline flow velocity measurement device based on terahertz technology, combined with the lens antenna to constrain the beam to a small range At the same time, the overall size is guaranteed to be small. The whole machine adopts the time-sharing working mode, and the average power is lower than 30mW. The Doppler spectrum center frequency estimation algorithm is used to calculate the flow velocity Doppler frequency, and the velocity statistical filtering method is used to obtain stable and reliable flow velocity. measurement results.

At present, the non-contact radar current meter is widely used in the monitoring of river flow velocity. The K-band is used, and the measurement dynamic range required for river flow measurement is large: 0.3m/s-20m/s. Due to its small carrier frequency, theoretically it can pass Reduce the sampling rate and increase the sampling points to reduce the error, but this method will increase the working time of the radar. In actual engineering projects, it needs to cover a large dynamic range, and the sampling rate cannot be too low. At the same time, the number of sampling points is directly related to the amount of processor calculation. It cannot be too large, so the effect of adjusting the parameters to improve the speed measurement accuracy is limited. In response to the problem of large velocity measurement error, some scholars have proposed super-resolution algorithms to improve velocity measurement accuracy: Rife-Jane method, energy center of gravity method, spectrum refinement algorithm, etc. However, complex algorithms increase the amount of computation, resulting in increased power consumption, pipeline The flow velocity range is generally less than 2m/s, usually around 0.6~0.8m/s. When the water flow rate is small, it may be less than 0.3m/s. When the flow rate is slow, the Doppler frequency is small, and the surface ripple of the water flow is small, and the intermediate frequency is amplified. There is a band-pass filter in the circuit, so the K-band flowmeter is not suitable for measuring the flow velocity of underground pipelines; the existing flowmeter is not convenient to install underground, and the specifications of the device cannot be adjusted according to different use environments, making the device suitable for use. At the same time, the endurance of the device during detection is poor, and it is inconvenient to disassemble, repair, and replace parts in memory, which is very troublesome.

Utility model content

The purpose of this utility model is to provide a drainage pipeline flow velocity measurement device based on terahertz technology, so as to solve the problems raised in the above-mentioned background technology. In order to achieve the above purpose, the present utility model provides the following technical solutions: a device for measuring the flow velocity of a drainage pipeline based on terahertz technology, comprising a box body and a protection mechanism, the inside of the box body is provided with a measuring mechanism with a computer, and the box body is provided with a measuring mechanism with a computer. An installation mechanism with a battery is arranged on the upper part, and a partition plate is fixedly connected to the inner wall of the box body.

The measuring mechanism includes a computer, a connector, a voltage-controlled oscillator, an analog-digital acquisition controller and a filter, a first sliding block is slidably connected to the upper part of the partition plate, and a bolt is threadedly connected to the first sliding block. The number of the first sliders is four, and the tops of the three first sliders located on the top of the partition plate are respectively fixed with a computer, an analog-digital acquisition controller, and a filter, and the voltage-controlled oscillator is fixed. Installed on the top of the inner wall of the box, the connector is fixedly installed on the bottom end of the first slider located at the bottom of the partition plate, and the lens antenna is fixedly installed on the connector, and the lens antenna moves through and is installed on the box body. Bottom of one side panel.

The installation mechanism includes a battery, a support plate, an inverter, a second sliding block and a solar charging plate, a sliding plate is slidably connected to the top of the box body, the battery is fixedly installed on the top surface of the sliding plate, and the box body is slidably connected with a sliding plate. A support plate is fixedly connected to the top surface of the support plate, an inverter is fixedly installed at the bottom of the support plate, a solar charging plate is slidably connected to the box body through the second slider, and the outer surface of one side plate of the box body is A threaded cylinder is fixedly connected, a threaded rod is threadedly connected in the threaded cylinder, a cage is fixedly connected to the top of the inner wall of the box, and the cage is filled with silica gel particles.

Preferably, the protection mechanism includes a hinge and a door panel, the box body is fixedly connected with a hinge, and the box body is rotatably connected with the door panel through the hinge.

Preferably, the battery is respectively electrically connected with a solar charging panel, a computer, a connector, a voltage-controlled oscillator, an analog-to-digital acquisition controller, a filter and a lens antenna.

Preferably, the number of the threaded rods is four, and the four threaded cylinders are distributed on the two side panels of the box body in a rectangular shape.

Preferably, a fireproof layer is provided inside the box, and the fireproof layer is composed of asbestos fibers, expanded vermiculite and expanded perlite.

Preferably, the number of the bolts is five, and the five bolts are respectively distributed on the two second sliding blocks and the partition plate.

Compared with the prior art, the beneficial effects of the present utility model:

In the utility model, by rotating the threaded rod, the threaded rod is engaged with the thread in the threaded cylinder to generate thrust, and the installation height and inclination angle of the device are adjusted according to the installation needs. The charging board supplies power to the battery, and the electronic components are energized through the inverter, which enhances the battery life of the device and expands the applicable surface of the device;

In the present invention, by using the chip of the voltage-controlled oscillator with integrated on-chip antenna and the lens antenna, the beam focusing function can be realized and the gain can be improved. The Puller frequency is larger, and the blind spot effect caused by hardware high-pass filtering is considered. Therefore, the terahertz radar flow rate monitoring device has the advantages of small size, low power consumption, non-contact and high precision.

Description of drawings

Fig. 1 is one of the schematic diagrams of the overall structure of the utility model;

Fig. 2 is the second schematic diagram of the overall structure of the utility model;

Fig. 3 is the third schematic diagram of the overall structure of the utility model;

FIG. 4 is a schematic diagram of the internal structure of the utility model.

In the figure: 1. Box; 2. Baffle; 3. Computer; 4. Connector; 5. Voltage-controlled oscillator; 6. Analog-to-digital acquisition controller; 7. Filter; 8. Lens antenna; 9. Battery ;901, slide plate; 10, support plate; 11, inverter; 12, second slider; 13, solar charging plate; 14, fireproof layer; 15, threaded barrel; 16, threaded rod; 17, first slider ; 18, bolts; 19, cages; 20, silica gel particles; 21, hinges; 22, door panels.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to FIGS. 1 to 4 , the present utility model provides a technical solution: a device for measuring the flow velocity of a drainage pipeline based on terahertz technology, comprising a box body 1 and a protection mechanism, and a measurement mechanism with a computer 3 is arranged inside the box body 1 , the box body 1 is provided with an installation mechanism with a battery 9 , and a partition plate 2 is fixedly connected to the inner wall of the box body 1 .

The measuring mechanism includes a computer 3, a connector 4, a voltage-controlled oscillator 5, an analog-digital acquisition controller 6 and a filter 7. A first sliding block 17 is slidably connected to the baffle 2, and a first sliding block 17 is threadedly connected with a Bolts 18, the number of the first sliders 17 is four, and the tops of the three first sliders 17 located on the top of the partition plate 2 are respectively fixed with a computer 3, an analog-digital acquisition controller 6, a filter 7, a voltage control The oscillator 5 is fixedly installed on the top of the inner wall of the box body 1, the connector 4 is fixedly installed on the bottom end of the first slider 17 located at the bottom of the partition plate 2, the lens antenna 8 is fixedly installed on the connector 4, and the lens antenna 8 is movable through Installed at the bottom of one side panel of box 1.

The installation mechanism includes a battery 9, a support plate 10, an inverter 11, a second slider 12 and a solar charging plate 13. A sliding plate 901 is slidably connected to the top of the box body 1. The battery 9 is fixedly installed on the top surface of the sliding plate 901. A support plate 10 is fixedly connected to the top surface of the body 1, an inverter 11 is fixedly installed at the bottom of the support plate 10, a solar charging plate 13 is slidably connected to the box body 1 through the second slider 12, and a side plate of the box body 1 is A threaded cylinder 15 is fixedly connected on the outer surface, a threaded rod 16 is threadedly connected inside the threaded cylinder 15, a cage 19 is fixedly connected to the top of the inner wall of the box 1, and the cage 19 is filled with silica gel particles 20.

In this embodiment, as shown in FIG. 1 , FIG. 2 , FIG. 3 and FIG. 4 , the protection mechanism includes a hinge 21 and a door panel 22 , the box body 1 is fixedly connected with a hinge 21 , and the box body 1 is rotatably connected with a hinge 21 . Door panel 22.

In this embodiment, as shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the battery 9 is connected to the solar charging board 13, the computer 3, the connector 4, the voltage-controlled oscillator 5, the analog-digital acquisition controller 6, and the filter, respectively. 7 and the lens antenna 8 are electrically connected.

In this embodiment, as shown in FIG. 1 , FIG. 2 , FIG. 3 and FIG. 4 , the number of threaded rods 16 is four, and the four threaded cylinders 15 are distributed on the two side panels of the box body 1 in a rectangular shape.

In this embodiment, as shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the interior of the box 1 is provided with a fireproof layer 14, and the fireproof layer 14 is composed of asbestos fibers, expanded vermiculite and expanded perlite.

In this embodiment, as shown in FIG. 1 , FIG. 2 , FIG. 3 and FIG. 4 , the number of bolts 18 is five, and the five bolts 18 are respectively distributed on the two second sliding blocks 12 and the partition plate 2 .

The use method and advantages of the present utility model: when the terahertz technology-based drainage pipeline flow velocity measuring device is in use, the working process is as follows:

As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, by rotating the threaded rod 16, the threaded rod 16 is engaged with the thread in the threaded barrel 15 to generate thrust, and the installation height and inclination angle of the device are adjusted according to the installation needs, and the device After installing in the designated position, turn on the circuit switch, supply power to the battery 9 through the solar charging panel 13, and energize the electronic components through the inverter 11, so that the battery life of the device is enhanced, and the applicable surface of the device is expanded, which solves the problem of existing It is not convenient to install the flowmeter underground, and the specifications of the device cannot be adjusted according to different use environments, which reduces the applicable surface of the device. At the same time, the battery life of the device during detection is poor, and it is inconvenient to remember to disassemble, repair and replace parts. , a very troublesome problem.

When the lens antenna 8 forms an angle of 30°-50° with the direction of the flow velocity of the water flow in the drain pipe, a continuous wave electromagnetic signal of a fixed frequency is emitted. When the electromagnetic wave signal reaches the surface of the fluid, Bragg scattering occurs, and the Doppler velocity of the fluid is superimposed to receive the scattering. For the echo signal, the Doppler intermediate frequency signal is extracted by mixing the local oscillator signal and the echo signal. When the installation angle of the lens antenna 8 is consistent with the flow velocity, the Doppler frequency obtained by selecting a device with a higher frequency is larger. Considering the hardware Due to the blind zone effect brought about by high-pass filtering, the terahertz radar flow rate monitoring equipment has the advantages of small size, low power consumption, non-contact and high precision, which solves the problem that the existing flowmeter cannot meet the needs of use conditions and requires regular maintenance by personnel. and maintenance, which requires a lot of manpower.

The basic principles, main features and advantages of the present invention have been shown and described above. It should be understood by those skilled in the industry that the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention, without departing from the present invention. Under the premise of the spirit and scope of the new model, there will be various changes and improvements in the present invention, and these changes and improvements all fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. A drainage pipeline flow velocity measuring device based on terahertz technology, comprising a box (1) and a protection mechanism, characterized in that: the inside of the box (1) is provided with a measuring mechanism with a computer (3), the An installation mechanism with a battery (9) is arranged on the box body (1), and a partition plate (2) is fixedly connected to the inner wall of the box body (1); The measuring mechanism comprises a computer (3), a connector (4), a voltage-controlled oscillator (5), an analog-digital acquisition controller (6) and a filter (7), and the upper sliding connection of the partition plate (2) There is a first sliding block (17), the first sliding block (17) is threadedly connected with a bolt (18), the number of the first sliding block (17) is four, and the first sliding block (17) is located at the top of the partition plate (2). A computer (3), an analog-digital acquisition controller (6), and a filter (7) are respectively fixedly installed on the tops of the three first sliding blocks (17), and the voltage-controlled oscillator (5) is fixedly installed on the On the top of the inner wall of the box body (1), the connector (4) is fixedly mounted on the bottom end of the first slider (17) located at the bottom of the partition plate (2), and a lens is fixedly mounted on the connector (4) an antenna (8), the lens antenna (8) is movably installed on the bottom of a side plate of the box body (1); The installation mechanism includes a battery (9), a support plate (10), an inverter (11), a second slider (12) and a solar charging plate (13), and the top of the box body (1) is slidably connected with A sliding plate (901), the battery (9) is fixedly installed on the top surface of the sliding plate (901), a supporting plate (10) is fixedly connected to the top surface of the box (1), and the supporting plate (10) An inverter (11) is fixedly installed at the bottom of the box body (1), a solar charging board (13) is slidably connected to the box body (1) through a second slider (12), and the outer surface of one side plate of the box body (1) A threaded barrel (15) is fixedly connected to the top, a threaded rod (16) is internally threadedly connected to the threaded barrel (15), and a cage (19) is fixedly connected to the top of the inner wall of the box body (1). (19) is filled with silica gel particles (20). 2. The device for measuring the flow velocity of a drainage pipeline based on terahertz technology according to claim 1, wherein the protection mechanism comprises a hinge (21) and a door panel (22), and the box body (1) is fixed A hinge (21) is connected, and the box body (1) is connected with a door panel (22) through the hinge (21). 3. A device for measuring the flow velocity of a drainage pipeline based on terahertz technology according to claim 1, wherein the battery (9) is connected to a solar charging panel (13), a computer (3), a connector (4), respectively. ), a voltage-controlled oscillator (5), an analog-digital acquisition controller (6), a filter (7) and a lens antenna (8) are electrically connected. 4. The device for measuring the flow velocity of a drainage pipeline based on terahertz technology according to claim 1, wherein the number of the threaded rods (16) is four, and the four threaded cylinders (15) are rectangular Distributed on the two side panels of the box body (1). 5. The device for measuring the flow velocity of a drainage pipeline based on terahertz technology according to claim 1, characterized in that: a fireproof layer (14) is provided inside the box (1), and the fireproof layer (14) It is composed of asbestos fibers, expanded vermiculite and expanded perlite. 6 . The device for measuring the flow velocity of a drainage pipeline based on terahertz technology according to claim 1 , wherein the number of the bolts ( 18 ) is five, and the five bolts ( 18 ) are correspondingly distributed in the on the two second sliders (12) and the partition plate (2).

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