Wireless water level gauge based on data fusion of laser radar and millimeter wave radar

Abstract

The utility model provides a wireless water level gauge based on data fusion of a laser radar and a millimeter wave radar, which relates to the technical field of water level gauges and comprises a shell, a circuit board, the millimeter wave radar, the laser radar, a power supply module and a communication module. A millimeter-wave radar cover and a laser radar protection cover are installed on the outer side of the millimeter-wave radar and the outer side of the laser radar respectively, the communication module comprises an antenna connector, the power supply module comprises a power supply connector, and the antenna connector and the power supply connector are arranged on the different side faces of the shell respectively and are different from the arrangement faces of the millimeter-wave radar and the laser radar. By arranging the millimeter wave radar and the laser radar, the two kinds of radars can acquire measurement data, so that the system has the advantages of high light interference resistance and high reliability of distance measurement data; and different module parts are effectively separated in layout, so that protection processing can be carried out in time after a single process is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of water level meters, in particular to a wireless water level meter based on the fusion of laser radar and millimeter wave radar data. Background Art

[0002] Rangefinders are used to measure the distance between a carrier and a target. They typically utilize laser, millimeter wave, or microwave measurement principles. Laser ranging utilizes the phase of light waves or the transmission time of pulsed light waves to obtain distance measurements. This method offers high accuracy and precise measurement locations. However, its disadvantage is that the light waves are easily affected by ambient light. Interference resistance can be improved by increasing the optical power or selecting wavelengths that differ from those of interfering light. However, due to safety and cost considerations, significant improvements in interference resistance are often not feasible in common applications, and the reliability of the ranging data is subject to certain risks. Millimeter wave ranging offers the advantages of low cost, all-weather operation, and compensating for the ambient light effects of laser ranging. However, the divergence angle of millimeter wave ranging is much larger than that of laser ranging. Distance measurement results are typically determined by the projected area determined by the divergence angle and the distance being measured, resulting in low resolution. If the projected surface is uneven, the test results, depending on the strategy, may output a composite measurement data that may differ significantly from the actual distance to the measured location, resulting in unreliable ranging results.

[0003] As mentioned above, laser ranging suffers from significant interference from external light, while millimeter-wave ranging suffers from low position resolution. Therefore, there is an urgent need to develop a rangefinder that is both robust to light interference and provides highly reliable data. Utility Model Content

[0004] The purpose of the utility model is to provide a wireless water level meter based on the fusion of laser radar and millimeter wave radar data, which solves the problems of large interference from external light or low ranging position resolution when using single laser ranging or millimeter wave ranging.

[0005] To solve the above problems, the utility model provides a wireless water level meter based on the fusion of laser radar and millimeter wave radar data, including a shell, a circuit board, a millimeter wave radar, a laser radar, a power supply module and a communication module. The millimeter wave radar and the laser radar are both installed on the shell and are facing the same side, preferably installed on the same surface. The millimeter wave radar and the laser radar are respectively installed with a millimeter wave radar cover and a laser radar protective cover on the outside. The communication module includes an antenna connector, and the power supply module includes a power supply connector. The antenna connector and the power supply connector are respectively arranged on different sides of the shell and on different surfaces from the setting surface of the millimeter wave radar and the laser radar.

[0006] By installing millimeter-wave radar and lidar, the problem of low reliability of traditional water level meters using a single component for ranging is solved. In addition, considering that the assembly process of the portable ranging module involves multiple processes and links such as functional module assembly, circuit assembly, dispensing, inspection, adjustment and testing, the different module parts are effectively separated in layout.

[0007] According to an embodiment of the present invention, the water level gauge further comprises a bracket, wherein the bracket is a bent plate, and holes for installing the shell are provided on the bracket, thereby realizing a suspended installation of the shell.

[0008] According to an embodiment of the present invention, a mounting lug is provided on the housing, and the housing is aligned with the hole on the bracket through the mounting lug, and then connected by bolts.

[0009] According to an embodiment of the present invention, a positioning rib is provided in the housing, and a positioning groove matching the positioning rib is provided on the circuit board for positioning and installing the circuit board.

[0010] Optionally, the water level meter of this solution can be powered directly by the mains or by batteries.

[0011] Preferably, the power supply module further includes a battery, the power supply connector is connected to the battery, and the battery is charged through the power supply connector.

[0012] According to one embodiment of the utility model, a battery positioning and mounting area is provided in the shell, and a battery positioning and mounting area is formed around the battery positioning and mounting area by arranging positioning columns, cooperating with the raised portion and the outer wall of the shell to form a battery positioning and mounting area that matches the shape of the battery. The battery is installed in the battery positioning and mounting area and fixed by a battery fixing plate.

[0013] According to an embodiment of the present invention, there are gaps between the millimeter wave radar, the laser radar and the battery to ensure heat dissipation.

[0014] According to an embodiment of the present invention, a detachable cover is installed on the housing, and the provision of the cover facilitates the installation and maintenance of internal equipment.

[0015] According to an embodiment of the present invention, the antenna connector is a 4G antenna connector.

[0016] According to an embodiment of the present invention, the water level meter further includes a program debugging interface.

[0017] The beneficial effect of the present invention is that, by arranging millimeter-wave radar and laser radar, both radars can obtain measurement data when performing ranging, thereby having the advantages of strong resistance to light interference and high reliability of ranging data; and, in this solution, by integrating the various structures, the water level meter has high integration, small size, and is easy to install. Different module parts are effectively separated in layout, which is convenient for timely protection processing after a single process is completed, and can effectively avoid the introduction of quality risks such as static electricity, excess objects, and foreign object damage in the assembly, debugging, combined transportation, and process handover. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the overall structure of the water level gauge;

[0020] Figure 2 It is a structural diagram of the internal components of the water level gauge;

[0021] Figure 3 This is a schematic diagram of the structure of the internal components of the water level gauge behind the hidden circuit board;

[0022] Figure 4 is a structural schematic diagram of the shell;

[0023] Figure 5 This is a structural diagram of the water level gauge installed on the bracket;

[0024] Figure 6 This is a schematic diagram of the connection between the circuit board and other structures. DETAILED DESCRIPTION

[0025] The following description is intended only to disclose the present invention and to enable those skilled in the art to implement the present invention. The embodiments described below are provided for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention as defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other solutions that do not depart from the spirit and scope of the present invention.

[0026] Example 1:

[0027] A wireless water level meter based on the fusion of lidar and millimeter wave radar data, such as Figure 5 , including a water level meter 1 and a bracket 2.

[0028] like Figure 1 The water level meter 1 includes a housing 102, a circuit board 108 ( Figure 6 system board), millimeter wave radar 109, lidar 110, power supply module and communication module.

[0029] The housing 102 is as follows Figure 1 、 Figure 2 As shown, the housing 102 is made of hard aluminum alloy 2A12-T4 with a high elastic modulus / density ratio, a high yield strength / density ratio, and good thermal conductivity, and the surface is black anodized.

[0030] A detachable cover 101 is mounted on the housing 102 . The provision of the cover 101 facilitates installation and maintenance of internal equipment.

[0031] The circuit board 108 is electrically connected to the millimeter wave radar 109, the laser radar 110, the power supply module and the communication module. Figure 6 , which includes a power management module, a communication module and a 4G communication module. The power supply module includes a power supply connector 112 and a battery 114. The power supply connector 112 is connected to the battery 114. The battery 114 is charged through the power supply connector 112. The battery 114 supplies power to other devices through the circuit board 108.

[0032] like Figure 4 A battery positioning and mounting area 117 is provided in the shell 102. Positioning columns 116 are provided around the battery positioning and mounting area 117, which cooperate with the raised portion and the outer wall of the shell to form a battery positioning and mounting area 117 that matches the shape of the battery. The battery 114 is installed in the battery positioning and mounting area 117 and fixed by the battery fixing plate 113.

[0033] like Figure 2 A plurality of positioning ridges 118 are provided on the inner wall of the housing 102, and a positioning groove matching the positioning ridges 118 is provided on the circuit board 108 for positioning and installing the circuit board 108. After being installed in place, the circuit board 108 is fixed by screws.

[0034] The circuit board 108 and the battery 114 are layered to reduce the overall volume.

[0035] Preferably, if Figure 2 , a notch 119 is provided on the circuit board 108 to achieve the effect of assisting heat dissipation and facilitating maintenance of internal components, such as Figure 3 There are gaps between the millimeter wave radar 109, the laser radar 110 and the battery 114 to ensure heat dissipation.

[0036] The millimeter wave radar 109 and the laser radar 110 are both facing the same side and are preferably installed on the same surface. The millimeter wave radar cover 105 and the laser radar protective cover 106 are respectively installed on the outside of the millimeter wave radar 109 and the laser radar 110. The laser radar 110 is fixed by a laser radar fixing plate 115.

[0037] The communication module includes an antenna connector 103, which is a 4G antenna connector and an SMA connector installed on the structural cover for connecting a 4G antenna. The signal interface of the antenna is connected to the SMA connector. The antenna body has a suction cup and the placement position can be adjusted according to the signal quality.

[0038] Considering that the assembly process of the portable distance measurement module involves multiple processes and links such as functional module assembly, circuit assembly, dispensing, inspection, adjustment and testing, different module parts are effectively separated in layout to facilitate timely protection after the completion of a single process. This can effectively avoid the introduction of static electricity, excess objects, foreign object damage and other quality risks during assembly, debugging, combined transportation, process handover and other links. Figure 1 A millimeter wave radar 109, a laser radar 110 and a switch 107 are set at the bottom of the shell 102, an antenna connector 103 is set on the side of the shell 102, and a power supply connector 112 and a program debugging interface 111 are set on the top surface of the shell 102.

[0039] The program debugging interface 111 is a DB9 female plug-in, which is specially used for software debugging and upgrading. After the product is delivered, the DB9 connector is sealed with a sealing cover.

[0040] The switch 107 is preferably a push button switch with an indicator light, which is used to control the power on and off of the entire module. The switch is installed on the structural body. After the switch connector is turned on, the ring-shaped indicator light on the switch lights up, and the indicator light goes out after the switch is turned off.

[0041] Preferably, an alarm signal interface may also be provided on the housing 102, through which an audible and visual alarm may be connected.

[0042] This solution solves the problem of low reliability of traditional water level meters using a single component for distance measurement by providing a millimeter wave radar 109 and a laser radar 110 .

[0043] When performing ranging, the first step is to perform laser ranging; the second step is to perform millimeter wave ranging; the third step is to perform fusion calculations on the ranging results according to the internal setting program, or directly output the two ranging results through the 4G communication module, and the control center that aggregates the data processes the data to obtain the ranging result.

[0044] like Figure 5 The bracket 2 is a bent plate with a fixed portion on one side and a hole for installing the shell 102 on the other side, so that the shell 102 can be installed in the air. This bracket structure is simple and easy to install. Several mounting ears 104 are provided on the shell 102. The shell 102 is aligned with the holes on the bracket 2 through the mounting ears 104, and then connected by bolts.

[0045] Example 2: Based on Example 1, the module's external power supply is compatible with two modes, namely standard DC power supply (laboratory) or solar cell (outdoor). The module power supply rated voltage is 16V to 32V. The module power supply logic is as follows:

[0046] (1) When using a standard power supply, the module load is powered by an external power supply, and the external power supply charges the battery at the same time;

[0047] (2) There are two situations when using solar cells for power supply: when the solar cell panel is set, when the solar cell has output (the solar cell has two working states, when the supply voltage exceeds 18V, it outputs the actual voltage to the outside, and when the supply voltage is lower than 18V, it stops supplying power), the module load is powered by the solar cell, and the solar cell charges the built-in battery at the same time; when the solar cell has no output, the module load is powered by the built-in battery.

[0048] (3) The switch only turns the module load on and off and does not affect the charging of the module's built-in battery.

[0049] This solution can give full play to the advantages of laser ranging and millimeter wave ranging, overcome the disadvantages of laser ranging that is greatly interfered with by external light, and overcome the disadvantage of millimeter wave ranging that is low ranging position resolution, and has the characteristics of strong resistance to light interference and high reliability of ranging data.

[0050] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended only as examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations and modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

1. A wireless water level meter based on laser radar and millimeter wave radar data fusion, characterized by: The invention comprises a housing (102), a circuit board (108), a millimeter-wave radar (109), a laser radar (110), a power supply module and a communication module. The millimeter-wave radar (109) and the laser radar (110) are both mounted on the housing (102) and face the same side. A millimeter-wave radar cover (105) and a laser radar protective cover (106) are respectively mounted on the outsides of the millimeter-wave radar (109) and the laser radar (110). The communication module comprises an antenna connector (103). The power supply module comprises a power supply connector (112). The antenna connector (103) and the power supply connector (112) are respectively arranged on different sides of the housing (102) and on different sides from the arrangement surface of the millimeter-wave radar (109) and the laser radar (110).

2. The wireless water level meter based on laser radar and millimeter wave radar data fusion according to claim 1 is characterized in that: The water level gauge further comprises a bracket (2), wherein the bracket (2) is a bent plate body, and a hole for mounting the housing (102) is provided on the bracket (2).

3. The wireless water level meter based on laser radar and millimeter wave radar data fusion according to claim 2 is characterized in that: The shell (102) is provided with a mounting lug (104), and the shell (102) is connected to the bracket (2) via the mounting lug (104).

4. The wireless water level meter based on laser radar and millimeter wave radar data fusion according to claim 1 is characterized in that: A positioning rib (118) is provided in the housing (102), and a positioning groove matching the positioning rib (118) is provided on the circuit board (108).

5. The wireless water level meter based on laser radar and millimeter wave radar data fusion according to claim 4 is characterized in that: The power supply module further includes a battery (114), and the power supply connector (112) is connected to the battery (114).

6. The wireless water level meter based on laser radar and millimeter wave radar data fusion according to claim 5 is characterized in that: A battery positioning and installation area (117) is provided in the housing (102), and the battery (114) is installed in the battery positioning and installation area (117) and fixed by a battery fixing plate (113).

7. The wireless water level meter based on laser radar and millimeter wave radar data fusion according to claim 5 or 6, characterized in that: There are gaps between the millimeter wave radar (109), the laser radar (110) and the battery (114).

8. The wireless water level meter based on laser radar and millimeter wave radar data fusion according to any one of claims 1 to 6, characterized in that: A detachable cover (101) is mounted on the housing (102).

9. The wireless water level meter based on laser radar and millimeter wave radar data fusion according to claim 7, characterized in that: The antenna connector (103) is a 4G antenna connector.

10. The wireless water level meter based on laser radar and millimeter wave radar data fusion according to claim 7, characterized in that: The water level meter also includes a program debugging interface (111).

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