Liquid level monitoring radar

Abstract

The utility model discloses a liquid level monitoring radar which comprises a detection device upper cover, a detection device lower shell is connected to the outer side of the lower end of the detection device upper cover through threads, a wire outlet hole is formed in the upper end of the detection device upper cover, a connecting cable is in contact with the interior of the wire outlet hole, and a wire locking table is fixedly connected to the outer side of the connecting cable. The fixed ring and the rotating ring are arranged at the lower end of the wave guide cover, the micro air pump and the motor are arranged on the fixed ring, the motor drives the rotating ring to rotate, and the air outlet pipe on the rotating ring discharges air to the lower end of the lens and cleans the lower end of the lens, so that the lower end of the lens is prevented from being adhered with water drops and other impurities; and meanwhile, the lens is wrapped inside the fixed ring and the rotating ring, so that the contact between the lens and the outside is more inconvenient, a protection effect on the lens can be achieved, and the lens is prevented from being impacted and damaged in the using and transporting process.

Description

Technical Field

[0001] The utility model relates to the technical field of detection radars, in particular to a liquid level monitoring radar. Background Art

[0002] Ultrasonic level sensors measure the level of liquids or materials by transmitting and receiving ultrasonic signals. The working principle is as follows: Transmission: The sensor transmits ultrasonic signals, usually through the transmitter on the top of the sensor. Propagation and reflection: Ultrasonic waves propagate in the air, and when they encounter the liquid / material interface, part of the ultrasonic waves are reflected back to the sensor. The receiver on the top of the sensor receives these reflected signals. Calculate the liquid level: Based on the time interval between the transmission and reception of the ultrasonic wave, the height or level of the liquid or material can be calculated. Ultrasonic level sensors have the following characteristics: non-contact measurement, high accuracy, wide measurement range, strong anti-interference ability, and strong adaptability.

[0003] The prior art provides a radar liquid level device for urban waterlogging and drainage monitoring (Announcement No.: CN219977525U), which includes: a detection device upper cover, a detection device lower shell, a radar antenna module, an integrated circuit board, and a waveguide cover; the detection device upper cover is cooperatively connected to the detection device lower shell, and the waveguide cover is cooperatively connected to the detection device lower shell; the radar antenna module is connected to the integrated circuit board, and the radar antenna module and the integrated circuit board are both installed inside the detection device upper cover.

[0004] But the device still has the following defects:

[0005] When the device is in use, the lower end of the lens is in contact with the outside world. Since the device is often used to detect the liquid level, the moisture content in the air above the liquid surface is relatively high. During the use of the lens, water droplets are easily attached to the bottom of the lens, and the water droplets are easy to adsorb other impurities in the air. When there are more impurities under the lens, it is easy to affect the use effect of the radar; the traditional high-precision liquid level monitoring radar adopts a frequency-modulated continuous wave system. The problem is that in order to improve the ranging accuracy and resolution, the bandwidth needs to be increased. Due to the limitation of the device, the cost of increasing the bandwidth of the unit chirp signal is too high. At the same time, the power consumption is also relatively large. In the application of liquid level monitoring, high precision and low power consumption are more important. Therefore, we need to propose a liquid level monitoring radar. Utility Model Content

[0006] The purpose of the utility model is to provide a liquid level monitoring radar, by arranging a fixed ring and a rotating ring at the lower end of the waveguide cover, a micro air pump and a motor are arranged on the fixed ring, the motor drives the rotating ring to rotate, and at the same time, the air outlet pipe on the rotating ring exhausts air to the lower end of the lens, so as to clean the lower end of the lens, so as to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A liquid level monitoring radar comprises an upper cover of a detection device, wherein the outer side of the lower end of the upper cover of the detection device is connected to a lower shell of the detection device by means of threads, a wire outlet hole is provided at the upper end of the upper cover of the detection device, a connecting cable is contacted inside the wire outlet hole, a wire locking platform is fixedly connected to the outer side of the connecting cable, the wire locking platform is fixedly connected to the upper cover of the detection device, a controller is fixedly connected to the inside of the upper cover of the detection device, a radar reflection cone is fixedly connected to the inside of the lower shell of the detection device, a lens is fixedly connected to the outer side of the radar reflection cone, a weight reduction groove is provided on the outer side of the lower shell of the detection device, a waveguide cover is fixedly connected to the lower end of the lower shell of the detection device, the waveguide cover is fixedly connected to the lens, and a cleaning component is arranged on the outer side of the waveguide cover.

[0009] Preferably, a fixing ring is fixedly connected to the outer side of the waveguide cover, a micro air pump is fixedly connected to the upper end of the fixing ring, a ventilation groove is provided inside the fixing ring, the ventilation groove is fixedly connected to the output pipe of the micro air pump, a T-shaped ring groove is provided inside the fixing ring, and a T-shaped block is slidably connected inside the T-shaped ring groove.

[0010] Preferably, the controller is in contact with the lower shell of the detection device, and the controller is fixedly connected to the connecting cable.

[0011] Preferably, a radar transmitting antenna is fixedly connected to the lower end of the controller, and the radar transmitting antenna is in contact with the lower shell of the detection device.

[0012] Preferably, a radar receiving antenna is fixedly connected to the lower end of the controller, and the radar receiving antenna is in contact with the lower shell of the detection device.

[0013] Preferably, the lower end of the fixed ring is rotatably connected to a rotating ring, and the rotating ring is fixedly connected to the T-block.

[0014] Preferably, an air outlet pipe is fixedly connected to the interior of the rotating ring, a micro motor is fixedly connected to the upper end of the fixed ring, and a connecting rod is fixedly connected to the output shaft of the micro motor.

[0015] Preferably, a rubber plate is fixedly connected to the lower end of the connecting rod, and the rubber plate is in contact with the rotating ring.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model arranges a fixed ring and a rotating ring at the lower end of the waveguide cover, and a micro air pump and a motor are arranged on the fixed ring. The motor drives the rotating ring to rotate, and at the same time, an air outlet pipe on the rotating ring exhausts air to the lower end of the lens, so as to clean the lower end of the lens, thereby preventing the lower end of the lens from being attached with water drops and other impurities, which would affect the use effect of the radar. At the same time, the fixed ring and the rotating ring wrap the lens inside, making it more inconvenient for the lens to contact with the outside world, thereby protecting the lens and preventing the lens from being hit and damaged during use and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The structure of the utility model is shown in FIG. Figure 1 ;

[0019] Figure 2 The structure of the utility model is shown in FIG. Figure 2 ;

[0020] Figure 3 It is a schematic diagram of the internal structure of the utility model;

[0021] Figure 4 The structure of the utility model Figure 3 A partial enlarged schematic diagram in the middle;

[0022] Figure 5 This is a graph showing how the electromagnetic frequency changes with time in this practical application.

[0023] In the figure: 1. detection device upper cover; 2. detection device lower shell; 3. wire outlet hole; 4. connecting cable; 5. wire locking platform; 6. controller; 7. radar transmitting antenna; 8. radar receiving antenna; 9. radar reflecting cone; 10. lens; 11. weight reduction groove; 12. waveguide cover; 13. cleaning assembly; 131. fixing ring; 132. micro air pump; 133. ventilation groove; 134. T-ring groove; 135. T-block; 136. rotating ring; 137. air outlet pipe; 138. micro motor; 139. connecting rod; 1310. rubber sheet. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-5 , the utility model provides a technical solution:

[0026] A liquid level monitoring radar comprises a detection device upper cover 1, the lower end outer side of the detection device upper cover 1 is connected to the detection device lower shell 2 by threading, the upper end of the detection device upper cover 1 is provided with a wire outlet hole 3, the inside of the wire outlet hole 3 contacts with a connecting cable 4, the outside of the connecting cable 4 is fixedly connected with a wire locking platform 5, the wire locking platform 5 is fixedly connected to the detection device upper cover 1, the inside of the detection device upper cover 1 is fixedly connected with a controller 6, the inside of the detection device lower shell 2 is fixedly connected with a radar reflection cone 9, the outside of the radar reflection cone 9 is fixedly connected with a lens 10, the outside of the detection device lower shell 2 is provided with a weight reduction groove 11, the lower end of the detection device lower shell 2 is fixedly connected with a waveguide cover 12, the waveguide cover 12 is fixedly connected to the lens 10, and the outside of the waveguide cover 12 is provided with a cleaning component 13.

[0027] Through the design of the radar reflection cone 9 and the lens 10, the radar reflection cone 9 is designed to have a reflection cone angle of 30 degrees, and the cone is mirror polished, which effectively reduces the attenuation of radar waves when they are reflected by the medium; the lens 10 is processed with a composite material with good wave transmission functionality, so that it has a larger wave transmittance, lower reflectivity and loss. Based on simulation and various data experiments, it is concluded that the optimal wave transmission thickness of the lens 10 is 2.2 mm.

[0028] A fixing ring 131 is fixedly connected to the outer side of the waveguide cover 12, a micro air pump 132 is fixedly connected to the upper end of the fixing ring 131, a ventilation groove 133 is provided inside the fixing ring 131, the ventilation groove 133 is fixedly connected to the output pipe of the micro air pump 132, a T-shaped ring groove 134 is provided inside the fixing ring 131, and a T-shaped block 135 is slidably connected inside the T-shaped ring groove 134.

[0029] The controller 6 is in contact with the lower shell 2 of the detection device, and the controller 6 is fixedly connected to the connecting cable 4 .

[0030] The lower end of the controller 6 is fixedly connected with a radar transmitting antenna 7, and the radar transmitting antenna 7 is in contact with the lower shell 2 of the detection device.

[0031] The lower end of the controller 6 is fixedly connected with a radar receiving antenna 8, and the radar receiving antenna 8 is in contact with the lower shell 2 of the detection device.

[0032] The lower end of the fixed ring 131 is rotatably connected to a rotating ring 136 , and the rotating ring 136 is fixedly connected to the T-block 135 .

[0033] An air outlet pipe 137 is fixedly connected to the interior of the rotating ring 136 , a micro motor 138 is fixedly connected to the upper end of the fixed ring 131 , and a connecting rod 139 is fixedly connected to the output shaft of the micro motor 138 .

[0034] A rubber plate 1310 is fixedly connected to the lower end of the connecting rod 139 , and the rubber plate 1310 is in contact with the rotating ring 136 .

[0035] Working principle: When installing the utility model, one end of the connecting cable 4 is connected to the external device, and the other end is connected to the controller 6. The wire locking platform 5 is fixed on the upper cover 1 of the detection device to fix the connecting cable 4 and seal the outlet hole 3. The controller 6 is fixedly installed in the upper cover 1 of the detection device. The radar transmitting antenna 7 and the radar receiving antenna 8 are fixedly connected to the controller 6. The radar reflection cone 9 is installed in the lower shell 2 of the detection device, and the lens 10 is installed at the lower end of the radar reflection cone 9. Finally, the waveguide cover 12 is installed at the lower end of the lower shell 2 of the detection device, and a sealing ring is provided between the waveguide cover 12 and the lower shell 2 of the detection device. The cleaning component 13 is fixedly installed on the waveguide cover 12;

[0036] The controller 6 controls the radar transmitting antenna 7 to synthesize a large bandwidth by means of segmented frequency conversion, thereby improving the monitoring distance accuracy and reducing the linearity requirements for each segment, making the hardware easier to implement. The pulse accumulation method is adopted, which can not only improve the sensitivity but also reduce the power consumption. During use, the micro motor 138 drives the connecting rod 139 to rotate, and the connecting rod 139 drives the rubber plate 1310 to rotate. The rubber plate 1310 rubs the rotating ring 136 to drive the rotating ring 136 to rotate. When the rotating ring 136 rotates, The T-block 135 rotates in the T-ring groove 134, and the T-block 135 limits and guides the rotating ring 136. At the same time, the micro air pump 132 works to inflate the inside of the ventilation groove 133. The air flow passes through the ventilation groove 133, enters the rotating ring 136, and is finally discharged from the air outlet pipe 137. The air outlet pipe 137 has the same slope as the lower end of the lens 10. The gas discharged from the air outlet pipe 137 cleans and dries the lower end of the lens 10 to prevent water droplets or gas impurities from adhering to the lower end of the lens 10 and affecting the detection results of the radar.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquid level monitoring radar, characterized in that: include: A detection device upper cover (1), wherein the outer side of the lower end of the detection device upper cover (1) is connected to the detection device lower shell (2) via threads; A wire outlet hole (3) is provided at the upper end of the upper cover (1) of the detection device, the interior of the wire outlet hole (3) contacts a connection cable (4), the outer side of the connection cable (4) is fixedly connected to a wire locking platform (5), and the wire locking platform (5) is fixedly connected to the upper cover (1) of the detection device; A radar reflection cone (9) fixedly connected to the interior of the lower shell (2) of the detection device, wherein a lens (10) is fixedly connected to the outer side of the radar reflection cone (9); A weight-reducing groove (11) is provided on the outer side of the lower shell (2) of the detection device; a waveguide cover (12) is fixedly connected to the lower end of the lower shell (2) of the detection device; the waveguide cover (12) is fixedly connected to the lens (10); and a cleaning assembly (13) is provided on the outer side of the waveguide cover (12).

2. A liquid level monitoring radar according to claim 1, characterized in that: A fixing ring (131) is fixedly connected to the outer side of the waveguide cover (12); a micro air pump (132) is fixedly connected to the upper end of the fixing ring (131); a ventilation groove (133) is provided inside the fixing ring (131); the ventilation groove (133) is fixedly connected to an output pipe of the micro air pump (132); a T-shaped ring groove (134) is provided inside the fixing ring (131); a T-shaped block (135) is slidably connected inside the T-shaped ring groove (134).

3. The liquid level monitoring radar according to claim 1, characterized in that: A controller (6) is fixedly connected to the interior of the upper cover (1) of the detection device, the controller (6) is in contact with the lower shell (2) of the detection device, and the controller (6) is fixedly connected to the connecting cable (4).

4. A liquid level monitoring radar according to claim 3, characterized in that: The lower end of the controller (6) is fixedly connected to a radar transmitting antenna (7), and the radar transmitting antenna (7) is in contact with the lower shell (2) of the detection device.

5. The liquid level monitoring radar according to claim 3, characterized in that: The lower end of the controller (6) is fixedly connected to a radar receiving antenna (8), and the radar receiving antenna (8) is in contact with the lower shell (2) of the detection device.

6. A liquid level monitoring radar according to claim 2, characterized in that: The lower end of the fixed ring (131) is rotatably connected to a rotating ring (136), and the rotating ring (136) is fixedly connected to the T-block (135).

7. A liquid level monitoring radar according to claim 6, characterized in that: An air outlet pipe (137) is fixedly connected inside the rotating ring (136), a micro motor (138) is fixedly connected to the upper end of the fixed ring (131), and a connecting rod (139) is fixedly connected to the output shaft of the micro motor (138).

8. The liquid level monitoring radar according to claim 7, characterized in that: The lower end of the connecting rod (139) is fixedly connected to a rubber plate (1310), and the rubber plate (1310) is in contact with the rotating ring (136).

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