Monitoring device

Abstract

The utility model provides a monitoring device. The monitoring device includes a millimeter wave radar and a housing. The millimeter wave radar comprises a first radar module used for measuring the water level and a second radar module used for measuring the water flow velocity, and in the first radar module and the second radar module, at least the first radar module uses a multi-vibrator antenna. The inner wall surface of the shell comprises a first mounting surface and a second mounting surface, in a preset mounting state of the monitoring equipment, the first mounting surface is parallel to a water surface to be detected, the second mounting surface is connected with the first mounting surface and is inclined relative to the first mounting surface, the first radar module is mounted on the first mounting surface, and the second radar module is mounted on the second mounting surface; the inner and outer sides, corresponding to the first radar module, of the housing are not provided with lenses and form a planar structure.

Description

Technical Field

[0001] The present application relates to the technical field of water quality measurement, and in particular to a monitoring device. Background Art

[0002] At present, the monitoring equipment for water bodies in urban pipe networks is divided into two forms: contact monitoring equipment and non-contact monitoring equipment. Contact monitoring equipment is greatly affected by the water quality environment. Debris and garbage often cover the probe, affecting the measurement, requiring frequent maintenance, and high maintenance costs. Non-contact monitoring equipment monitors through millimeter wave radar, which is generally equipped with a lens. The lens is used to reduce the number of times the radar wave radiates through different media, reduce interference signals, reduce the intensity of interference signals, and increase the strength of detection signals. However, when the monitoring equipment is submerged in the water, the lens may be contaminated. In addition, a protruding structure will be formed at the lens of the monitoring equipment, which is also easy to be covered by debris such as garbage, affecting the measurement.

[0003] For example, the patent with the announcement number CN214667048U discloses a radar flow meter, in which a radar for measuring liquid level is provided with an outwardly protruding lens portion, which has the problems involved in the above-mentioned non-contact monitoring device.

[0004] Therefore, there is still room for improvement in water monitoring equipment. Utility Model Content

[0005] In order to solve or alleviate at least one of the problems mentioned in the background technology, the present application provides a monitoring device.

[0006] The monitoring device provided in the embodiment of the present application includes:

[0007] A millimeter-wave radar, wherein the millimeter-wave radar comprises a first radar module for measuring a water level and a second radar module for measuring a water flow rate, wherein at least the first radar module uses a multi-element antenna.

[0008] A shell, wherein the inner wall surface of the shell includes a first mounting surface and a second mounting surface. In a predetermined installation state of the monitoring device, the first mounting surface is parallel to the water surface to be measured, the second mounting surface is connected to the first mounting surface and is inclined relative to the first mounting surface, the first radar module is installed on the first mounting surface, and the second radar module is installed on the second mounting surface. No lenses are arranged on the inner and outer sides of the shell corresponding to the first radar module, but a planar structure is formed.

[0009] In at least one embodiment, the radar frequency of the first radar module is 80 GHz, the radar frequency of the second radar module is 24 GHz, and the multi-element antenna includes an element array consisting of 8 rows and 16 columns of element elements.

[0010] In at least one embodiment, the millimeter wave radar includes a radar main control board and a radar shielding cover, the first radar module and the radar main control board are arranged together, and the radar shielding cover is arranged between the first radar module and the radar main control board; or

[0011] The second radar module and the radar main control board are arranged together, and the radar shielding cover is arranged between the second radar module and the radar main control board.

[0012] In at least one embodiment, the monitoring device further comprises:

[0013] Electromagnetic flowmeter, used to measure the flow rate of water in contact;

[0014] Liquid level meter, used for contact measurement of water level;

[0015] A control device, wherein the control device is configured to control the electromagnetic flowmeter to operate when the data measured by the liquid level meter exceeds a set value or when the data measured by the first radar module exceeds a set value, and to control the second radar module to operate when the data does not exceed the set value.

[0016] In at least one embodiment, the outer wall surface of the shell includes a front guide surface and a bottom measuring surface. In a predetermined installation state of the monitoring device, the bottom measuring surface is parallel to the water surface to be measured, the measuring position of the electromagnetic flowmeter and the measuring position of the liquid level meter are located on the bottom measuring surface, and the front guide surface is perpendicular to the bottom measuring surface.

[0017] In at least one embodiment, the front guide surface comprises:

[0018] a first arcuate surface, the first arcuate surface protruding toward the front side of the housing;

[0019] Two first connecting surfaces, the two first connecting surfaces are respectively connected to two rear ends of the first arc-shaped surface.

[0020] The shell further includes a shell side surface and a second arcuate surface, and the first connecting surface and the shell side surface are connected via the second arcuate surface.

[0021] In at least one embodiment, the electromagnetic flowmeter includes an excitation coil, the axis of the excitation coil perpendicularly intersects with the midline of the bottom measuring surface, or the axis of the excitation coil coincides with the axis of the inscribed cylinder of the first arcuate surface.

[0022] In at least one embodiment, the electromagnetic flowmeter also includes two induction electrodes respectively arranged on the left and right sides of the excitation coil, the connection line of the two induction electrodes passes through the axis of the excitation coil and is perpendicular to the front-to-back direction of the monitoring device, and the bottom of the two induction electrodes passes through the bottom measuring surface to form the measuring site of the electromagnetic flowmeter.

[0023] In at least one embodiment, the electromagnetic flowmeter further includes an electromagnetic main control board and an electromagnetic flowmeter shielding cover, the excitation coil and the induction electrode are connected to the electromagnetic main control board, and the electromagnetic flowmeter shielding cover is sleeved on the outside of the electromagnetic main control board.

[0024] In at least one embodiment, the monitoring device further includes an upper cover, which is mounted on the top of the shell, and a sealing ring is provided between the upper cover and the shell.

[0025] It can be understood that the existing millimeter-wave radars mostly use ellipsoid lens antennas, which have lenses and corresponding protruding structures. The millimeter-wave radar provided in this application uses a multi-vibrator antenna, which can increase the transmission signal strength and the number of receiving ends, and does not require an ellipsoid structure to constrain the beam angle. Therefore, this application does not need to set a lens, avoiding the problem of lens contamination. Not setting a lens allows the outer side of the radar setting of the shell to form a planar structure without protrusions, reducing the problem of easy garbage coverage. Therefore, this application can reduce the frequency of equipment maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 An axonometric view of a monitoring device according to an embodiment of the present application is shown.

[0027] Figure 2 A schematic diagram of an exploded view of a monitoring device according to an embodiment of the present application is shown.

[0028] Figure 3 A cross-sectional view of a monitoring device according to an embodiment of the present application is shown.

[0029] Figure 4 A top view of a monitoring device according to an embodiment of the present application is shown.

[0030] Figure 5 A bottom view of a monitoring device according to an embodiment of the present application is shown.

[0031] Figure 6 A schematic diagram of the structure of a millimeter wave radar of a monitoring device according to an embodiment of the present application is shown.

[0032] Figure 7 A schematic structural diagram of an electromagnetic flowmeter of a monitoring device according to an embodiment of the present application is shown.

[0033] Description of Reference Numerals

[0034] 100 millimeter wave radar; 110 first radar module; 120 second radar module; 130 radar shielding cover; 140 radar main control board; 150 mounting bracket;

[0035] 200 housing; 210 first mounting surface; 220 second mounting surface; 230 front guide surface; 231 first arc surface; 232 first connection surface; 240 bottom measurement surface; 241 chamfer; 242 center line; 243 connection hole; 250 housing side surface; 260 second arc surface; 270 edge; 280 cable connection port;

[0036] 300 electromagnetic flowmeter; 310 excitation coil; 311 axis; 320 induction electrode; 330 grounding electrode; 340 electromagnetic main control board; 350 shielding cover for electromagnetic flowmeter;

[0037] 400 Liquid level gauge;

[0038] 500 Upper cover;

[0039] 600 seal ring;

[0040] 700 cables;

[0041] 800 sealant. DETAILED DESCRIPTION

[0042] The exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present application, and are not intended to exhaust all possible methods of the present application, nor to limit the scope of the present application.

[0043] This application provides monitoring equipment, see Figures 1 to 3 , the monitoring device may include a millimeter wave radar 100 and a housing 200 .

[0044] The millimeter wave radar 100 may include a first radar module 110 for measuring water level and a second radar module 120 for measuring water flow rate. The radar frequencies of the first radar module 110 and the second radar module 120 may be the same or different. For example, the radar frequencies of the first radar module 110 and the second radar module 120 may both be 80 GHz. Alternatively, the radar frequency of the first radar module 110 is 80 GHz, and the radar frequency of the second radar module 120 is 24 GHz. In the two radar modules, at least the first radar module 110 uses a multi-element antenna. Exemplarily, the multi-element antenna includes an array of 8 rows and 16 columns of oscillator elements. Of course, the array of oscillators may be composed of more oscillator elements.

[0045] The housing 200 has no lenses on both sides of the inner and outer sides corresponding to the first radar module 110, and forms a planar structure without protrusions. In an optional embodiment, the housing 200 may also have no lenses on both sides of the inner and outer sides corresponding to the second radar module 120, and forms a planar structure without protrusions.

[0046] It can be understood that the existing millimeter wave radar 100 mostly uses an ellipsoidal lens antenna, whose ellipsoidal reflecting surface focuses electromagnetic waves, and has a lens and a corresponding protruding structure. The millimeter wave radar 100 provided in the present application uses a multi-element antenna to increase the transmission signal strength and the number of receiving ends, and does not require an ellipsoidal structure to constrain the beam angle. Therefore, the present application does not need to set a lens, avoiding the problem of lens contamination. Without a lens, the radar setting position on the housing 200 is formed into a planar structure (no protrusions are generated), reducing the problem of the protruding structure being easily covered by garbage, thereby reducing the frequency of equipment maintenance.

[0047] In one embodiment of the present application, see Figure 6 , the millimeter wave radar 100 may also include a radar shielding cover 130, a radar main control board 140 and a mounting bracket 150. The first radar module 110 and the second radar module 120 may be electrically connected to the radar main control board 140. The radar main control board 140 may be arranged together with the second radar module 120, and a radar shielding cover 130 may be arranged between the second radar module 120 and the radar main control board 140 to prevent the radar main control board 140 and the second radar module 120 from interfering with each other. Similarly, if the first radar module 110 and the radar main control board 140 are arranged together, a radar shielding cover 130 may be arranged between the first radar module 110 and the radar main control board 140. Of course, the radar main control board 140, the first radar module 110 and the second radar module 120 may also be provided with radar shielding covers respectively. The radar shielding cover 130 may be a metal shielding cover. The mounting bracket 150 is used to provide an installation position for the second radar module 120.

[0048] In one embodiment of the present application, see Figure 2 and Figure 3 The monitoring device further includes an electromagnetic flowmeter 300, a liquid level meter 400 and a control device. The electromagnetic flowmeter 300 is used to contact-measure the flow rate of the water body, and the liquid level meter 400 is used to contact-measure the liquid level of the water body. The control device is configured to control the electromagnetic flowmeter 300 to work when the data measured by the liquid level meter 400 exceeds the set value or the data measured by the first radar module 110 exceeds the set value, and control the second radar module 120 to work when it does not exceed the set value. The control device can be set separately or integrated in the first radar module 110 or the liquid level meter 400.

[0049] Exemplarily, the control device is configured as follows: when the liquid level height exceeds the measurement starting point of the liquid level meter 400, the electromagnetic flowmeter 300 works to perform contact monitoring, and the millimeter wave radar 100 does not work; when the liquid level does not exceed the measurement starting point of the liquid level meter 400, the millimeter wave radar 100 works, the first radar module 110 measures the water level, the second radar module 120 measures the water flow rate, non-contact monitoring is performed, and the electromagnetic flowmeter 300 does not work.

[0050] It is understandable that when using contact monitoring equipment or non-contact monitoring equipment alone for monitoring, there are blind spots in the monitoring. For example, when the water level is low, the contact monitoring equipment cannot work, and when the water level is high, the non-contact monitoring equipment cannot work. The present application combines the millimeter wave radar 100, the electromagnetic flowmeter 300 and the liquid level meter 400 to monitor the water body under various liquid level conditions, achieve measurement without blind spots, and has strong applicability. The monitoring equipment has a high degree of integration and a small size as a whole. It can be installed on the top of the inner wall of the pipe and is suitable for pipes with small diameters.

[0051] In one embodiment of the present application, see Figure 2 The housing 200 has an installation opening on the top to enable the installation of various components in the housing 200. The monitoring device also includes an upper cover 500 and a sealing ring 600. The upper cover 500 is installed at the installation opening of the housing 200. The sealing ring 600 is arranged between the upper cover 500 and the housing 200 to achieve sealing and meet the waterproof requirements. The monitoring device provided in the present application has a predetermined installation state, for example, when the upper cover 500 is fixed to the top of the inner wall of the pipeline, it is in a predetermined installation state.

[0052] In one embodiment of the present application, see Figure 3 The inner wall surface of the housing 200 includes a rear end of the housing ( Figure 3 The first mounting surface 210 is parallel to the water surface to be measured, the second mounting surface 220 is connected to the first mounting surface 210 and is inclined relative to the first mounting surface 210, the first radar module 110 is mounted on the first mounting surface 210, and the second radar module 120 is mounted on the second mounting surface 220.

[0053] It can be understood that for the first radar module 110, it can calculate the corresponding distance by the time from the signal being emitted to the time it is reflected by the water surface, and then calculate the water level by other fixed parameters (such as the diameter of the pipe to be measured, etc.). For the second radar module 120, it can calculate the flow rate of the fluid based on the principle of detecting Doppler frequency shift.

[0054] In one embodiment of the present application, see Figure 3The outer wall of the housing 200 includes a front guide surface 230 and a bottom measuring surface 240. The bottom measuring surface 240 is parallel to the water surface to be measured, and the measuring position of the electromagnetic flowmeter 300 and the measuring position of the liquid level meter 400 are located on the bottom measuring surface 240, which reduces the probability of garbage hanging and reduces the frequency of equipment maintenance.

[0055] In one embodiment of the present application, see Figure 3 , the front guide surface 230 can be perpendicular to the bottom measuring surface 240, so that the water body is not directed to the bottom, and the water flow rate of the bottom measuring surface 240 is not affected as much as possible. Of course, the front guide surface 230 can also be inclined to the bottom measuring surface 240. For example, the upper end of the front guide surface 230 is inclined toward the inner side of the shell 200, which can also have the effect of not affecting the water flow rate of the bottom measuring surface 240. In comparison, since the monitoring equipment is fixed to the top of the inner wall of the pipe to be measured, the implementation method in which the front guide surface 230 is perpendicular to the bottom measuring surface 240 can also avoid garbage accumulation on the upper part, which is a more preferred implementation method. Furthermore, a chamfer 241 can be set at the transition between the front guide surface 230 and the bottom measuring surface 240 (see Figure 3 ), reduce undulations and sharp edges.

[0056] In one embodiment of the present application, see Figure 3 and Figure 5 The front guide surface 230 includes a first arc surface 231 and two first connecting surfaces 232. The first arc surface 231 faces the front side of the housing 200 (eg Figure 3 The two first connection surfaces 232 are respectively connected to the two rear ends of the first arc surface 231. The housing 200 further includes a housing side surface 250 and a second arc surface 260, and the first connection surface 232 and the housing side surface 250 are connected via the second arc surface 260.

[0057] It can be understood that the shell 200 of the present application adopts a streamlined design as a whole, similar to the smooth front end face of a ship or submarine, without large undulations and sharp edges and corners, which can reduce its impact on the water flow pattern and improve the measurement accuracy of the electromagnetic flowmeter 300, thereby greatly improving the reliability and accuracy of the monitoring equipment. Of course, the front end face of the front guide surface 230 can also be formed by splicing two planes at an acute angle. The acute angle formed is conducive to dividing the water flow, reducing the impact of the water body, and making the monitoring equipment more stable. In one embodiment of the present application, the first curved surface 231, the first connecting surface 232, the second curved surface 260, and the shell side 250 can be continuous arcs to maintain a streamlined structural design.

[0058] In one embodiment of the present application, see Figure 2 and Figure 5The first curved surface 231 can extend all the way to the edge 270 of the top of the housing 200 for connecting with the upper cover 500 . The outer section of the curved surface (the first curved surface 231 , the second curved surface 260 ) in the front guide surface 230 is perpendicular to the bottom measuring surface 240 .

[0059] In one embodiment of the present application, see Figure 3 and Figure 7 The electromagnetic flowmeter 300 may include an excitation coil 310, an induction electrode 320, a ground electrode 330, an electromagnetic main control board 340, and an electromagnetic flowmeter shielding cover 350. The excitation coil 310, the induction electrode 320, and the ground electrode 330 may be connected to the electromagnetic main control board 340. The electromagnetic flowmeter shielding cover 350 may cover the electromagnetic main control board 340 to prevent electromagnetic interference between components.

[0060] In one embodiment of the present application, see Figure 5 , the axis 311 of the excitation coil 310 intersects perpendicularly with the center line 242 of the bottom measuring surface 240. It can be understood that the black dot at the axis 311 indicates the position of the axis, and the excitation coil 310 inside the housing 200 cannot be seen from the top view.

[0061] Although the design of the front guide surface 230 has reduced the impact on the water flow velocity of the bottom measuring surface 240 as much as possible, the shell will inevitably affect the water below it. Among them, the water flow velocity on the center line 242 of the bottom measuring surface 240 is least affected. Further, the axis of the excitation coil 310 of the electromagnetic flowmeter 300 can coincide with the axis of the inscribed cylinder of the first arc surface 231.

[0062] In one embodiment of the present application, see Figure 5 and Figure 7 There are two induction electrodes 3220 in the electromagnetic flowmeter 300 and they are arranged on the left and right sides of the excitation coil 310 ( Figure 5 The connection line of the two sensing electrodes 320 passes through the axis of the excitation coil 310 and is perpendicular to the front-to-back direction (or water flow direction, upstream and downstream direction) of the monitoring device.

[0063] See also Figure 3, the bottoms of the two sensing electrodes 320 pass through the bottom measuring surface 240 to form the measuring site of the electromagnetic flowmeter 300. The bottom of the grounding electrode 330 may be higher than the bottom of the sensing electrode 320. For example, a connecting hole 243 is provided on the bottom measuring surface 240, and the bottom of the grounding electrode 330 is located inside the shell 200, and contacts the water body through the connecting hole 243. Similarly, the measuring site of the liquid level meter 400 may be located on the bottom measuring surface 240, and the liquid level meter 400 may be higher than the grounding electrode 330, so that when the liquid level meter 400 contacts the water, both the sensing electrode 320 and the grounding electrode 330 have already contacted the water. When the liquid level meter 400 sends a signal to measure the flow rate of the water body through the electromagnetic flowmeter 300, the electromagnetic flowmeter 300 can have already contacted the water body and work normally.

[0064] The water can flow along the axis of the pipe to be tested, for example, Figure 4 The arrow direction shown on the middle upper cover 500 is the flow direction of the water body. The electromagnetic flowmeter 300 can be located at the front end of the monitoring device, the liquid level meter 300 is in the middle, and the millimeter wave radar 100 is located at the rear end.

[0065] In one embodiment of the present application, the front end of the housing 200 has a cable connection port 280, and the monitoring device also includes a cable 700, which can pass through the cable connection port 280 and provide power and interactive signals for the components in the housing 200. A sealant 800 can be provided at the cable connection port 280 to meet the waterproof requirements. Similarly, the excitation coil 310 of the electromagnetic flowmeter 300, the electromagnetic main control board 340, the level meter 400 and other parts can be potted with a sealant 800 to enhance the waterproof performance.

[0066] The monitoring device provided by the present application solves the problem of blind spots in the measurement of contact and non-contact flow meters, and solves the problem of large amounts of suspended matter and bubbles in sewage wells such as urban pipe networks affecting measurement accuracy. The monitoring device adopts an integrated structure with high integration and compact size.

[0067] The above is a preferred embodiment of the present application. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A monitoring device, characterized in that: include: A millimeter-wave radar, wherein the millimeter-wave radar comprises a first radar module for measuring a water level and a second radar module for measuring a water flow rate, wherein at least the first radar module uses a multi-element antenna. A shell, wherein the inner wall surface of the shell includes a first mounting surface and a second mounting surface. In a predetermined installation state of the monitoring device, the first mounting surface is parallel to the water surface to be measured, the second mounting surface is connected to the first mounting surface and is inclined relative to the first mounting surface, the first radar module is installed on the first mounting surface, and the second radar module is installed on the second mounting surface. No lenses are arranged on the inner and outer sides of the shell corresponding to the first radar module, but a planar structure is formed.

2. The monitoring device according to claim 1, characterized in that The radar frequency of the first radar module is 80 GHz, the radar frequency of the second radar module is 24 GHz, and the multi-element antenna includes an element array consisting of 8 rows and 16 columns of element elements.

3. The monitoring device according to claim 1, characterized in that: The millimeter wave radar includes a radar main control board and a radar shielding cover, the first radar module and the radar main control board are arranged together, and the radar shielding cover is arranged between the first radar module and the radar main control board; or The second radar module and the radar main control board are arranged together, and the radar shielding cover is arranged between the second radar module and the radar main control board.

4. The monitoring device according to claim 1, characterized in that The monitoring device also includes: Electromagnetic flowmeter, used to measure the flow rate of water in contact; Liquid level meter, used for contact measurement of water level; A control device, wherein the control device is configured to control the electromagnetic flowmeter to operate when the data measured by the liquid level meter exceeds a set value or when the data measured by the first radar module exceeds a set value, and to control the second radar module to operate when the data does not exceed the set value.

5. The monitoring device according to claim 4, characterized in that The outer wall surface of the shell includes a front guide surface and a bottom measuring surface. In a predetermined installation state of the monitoring device, the bottom measuring surface is parallel to the water surface to be measured, the measuring position of the electromagnetic flowmeter and the measuring position of the liquid level meter are located on the bottom measuring surface, and the front guide surface is perpendicular to the bottom measuring surface.

6. The monitoring device according to claim 5, characterized in that The front end guide surface comprises: a first arcuate surface, the first arcuate surface protruding toward the front side of the housing; Two first connecting surfaces, the two first connecting surfaces are respectively connected to two rear ends of the first arc-shaped surface. The shell further includes a shell side surface and a second arcuate surface, and the first connecting surface and the shell side surface are connected via the second arcuate surface.

7. The monitoring device according to claim 6, characterized in that The electromagnetic flowmeter comprises an excitation coil, the axis of which intersects perpendicularly with the center line of the bottom measuring surface, or the axis of which coincides with the axis of the inscribed cylinder of the first arc-shaped surface.

8. The monitoring device according to claim 7, characterized in that The electromagnetic flowmeter also includes two induction electrodes respectively arranged on the left and right sides of the excitation coil, the connection line of the two induction electrodes passes through the axis of the excitation coil and is perpendicular to the front-to-back direction of the monitoring device, and the bottom of the two induction electrodes passes through the bottom measuring surface to form the measuring site of the electromagnetic flowmeter.

9. The monitoring device according to claim 8, characterized in that The electromagnetic flowmeter further comprises an electromagnetic main control board and a shielding cover for the electromagnetic flowmeter. The excitation coil and the induction electrode are connected to the electromagnetic main control board, and the shielding cover for the electromagnetic flowmeter is sleeved on the outer side of the electromagnetic main control board.

10. The monitoring device according to any one of claims 1 to 9, characterized in that: The monitoring device further comprises an upper cover, which is mounted on the top of the shell, and a sealing ring is arranged between the upper cover and the shell.

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