Liquid level detection device and cleaning system of pilotless automobile

Abstract

A liquid level detection device comprises a circuit board, a magnet, a connecting piece, a floating body and a fixing piece. One end of the connecting piece fixes the floating body, the other end of the connecting piece is provided with a fixing part, the fixing part is rotatably connected to the fixing piece, the fixing piece is installed on the side face of the box body, the circuit board is installed on the magnet installation part of the fixing piece, the circuit board is provided with the Hall element, and the Hall element is right opposite to a magnet in the magnet installation part. When the floating body drives the magnet to rotate under the action of liquid buoyancy to change the output voltage of the Hall element, the Hall element provides a measured voltage signal for the controller, and the controller determines the rotating angle of the connecting piece according to the relation between the output voltage of the Hall sensor and the magnetic field of the magnet, so that the liquid level is calculated. The utility model further provides a cleaning system of the pilotless automobile with the liquid level detection device. The liquid level detection device can detect the liquid volume of the cleaning system in real time and monitor the liquid volume at any time, measurement is more correct, and therefore the safety of the pilotless automobile is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of liquid level detection device and the cleaning system of unmanned vehicle containing the liquid level detection device. BACKGROUND

[0002] The cleaning system of unmanned vehicle is the important part to ensure that vehicle sensor, camera and other key components are kept clean to maintain its normal operation.The existing car cleaning system uses washing system, and the detection of washing liquid needs to be improved. SUMMARY

[0003] The technical problem to be solved by the utility model is to overcome the above-mentioned shortcomings of prior art and provide a liquid level detection device and a cleaning system for unmanned vehicle containing the liquid level detection device, so as to measure the liquid level accurately and timely.

[0004] The utility model adopts the technical scheme to solve the above problems:

[0005] A kind of liquid level detection device, characterized in that: including circuit board, magnet, connecting piece, float, fixed part;The connecting piece one end fixed float, the other end is provided with fixed part, fixed part is rotatably connected on fixed part, fixed part is installed on the side of box, the circuit board is installed on the magnet installation part of fixed part, Hall element is installed on the circuit board, so that Hall element and the magnet in magnet installation part are opposite, when float is driven magnet to rotate by liquid buoyancy and changes the output voltage of Hall element, Hall element provides the voltage signal measured by controller, controller determines the angle of connecting piece rotation according to the output voltage of Hall sensor and the magnetic field relationship of magnet, to calculate the liquid level.

[0006] Better, the fixed part cross section is "G" shape, two supports are provided on the fixed part, the fixed part is clamped in the round hole of two supports, and the inner side of the two ends of the fixed part is respectively abutted against the outer side of two supports.

[0007] Better, the fixed part one end is provided with recess, the magnet is same with the recess in shape and size and is fixed in the recess, and is sealed by outer cover, so that the magnet can be better sealed.

[0008] Better, the connecting piece one end is provided with elastic buckle, after elastic buckle passes through the center hole of float, the elastic head is popped out to buckle the float.

[0009] The utility model provides a cleaning system of unmanned vehicle, including box, liquid level detection device, cleaning pump, electromagnetic valve, nozzle, controller, liquid level detection device and cleaning pump are installed on the box respectively, liquid level detection device is connected with the controller, and the liquid level signal that liquid level detection device detects in the box is transmitted to the controller and calculates the liquid level in real time, the controller judges the liquid level information, if the liquid level is too low, then output liquid supplement information, through the corresponding liquid of external input, if the liquid level is normal, then be in the standby state, the nozzle is connected with the outlet of cleaning pump through electromagnetic valve, and the cleaning pump, electromagnetic valve are controlled by the controller, and the cleaning fluid is sprayed from the nozzle or is closed through the opening and close control of cleaning pump, electromagnetic valve, and the corresponding type sensor is cleaned.

[0010] More specifically, the nozzle is a front cleaning nozzle, a rear cleaning nozzle and a sensing sensor cleaning nozzle.

[0011] Better, the side wall of the box is provided with a recess, and the cleaning pump is fixed in the recess, so that the structure is compact and the volume is small.

[0012] Better, the recess is provided with a bottom plate, a buckle and a top plate, the bottom of the cleaning pump is supported by the bottom plate, the side of the cleaning pump is installed on the side wall of the box through the buckle, and the top surface of the cleaning pump is limited by the top plate, so that the cleaning pump is firmly installed in the recess.

[0013] Compared with the prior art, the utility model has the advantages that: since the liquid level detection device is adopted, the liquid capacity of the cleaning system can be detected in real time, and the measurement is more correct, so that the safety of the unmanned vehicle is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structure principle drawing of the cleaning system of the unmanned vehicle of the utility model embodiment.

[0015] Figure 2 It is the three-dimensional schematic view in the cleaning system of the unmanned vehicle of the utility model embodiment.

[0016] Figure 3 It is the vertical direction sectional view of the utility model embodiment.

[0017] Figure 4 It is the horizontal direction sectional view of the utility model embodiment.

[0018] Figure 5 It is Figure 4 The enlarged view of the P part in the middle.

[0019] Figure 6 It is the exploded schematic view of the liquid level detection device of the utility model embodiment.

[0020] Figure 7Is the initial schematic diagram between the magnetic field of the magnet and the Hall sensor of the embodiment of the utility model.

[0021] Figure 8 Is the relationship diagram between the magnetic field direction of the magnet and the Hall sensor output voltage of the embodiment of the utility model. DETAILED DESCRIPTION

[0022] The utility model will be further described below in combination with the drawings and embodiments.

[0023] As Figures 1-8 Indicated, a kind of unmanned vehicle's cleaning system, including box 1, liquid level detection device 2, cleaning pump 3, electromagnetic valve 4, front cleaning nozzle 5, rear cleaning nozzle 6, perception sensor cleaning nozzle 7, controller 8.

[0024] The liquid level detection device 2 is connected with controller 8, the liquid level signal detected by the liquid level detection device 2 in box 1 is transmitted to controller 8 and real-time calculation is carried out to liquid level.Controlled by controller 8, if liquid level information, such as liquid level is too low, then output liquid supplement information, pass through the corresponding liquid of external input.If liquid level is normal, then in standby state.

[0025] In the embodiment, unmanned vehicle uses three types of nozzles, front cleaning nozzle 5, rear cleaning nozzle 6, perception sensor cleaning nozzle 7, and front cleaning nozzle 5, rear cleaning nozzle 6, perception sensor cleaning nozzle 7 clean corresponding type sensor respectively.

[0026] The inlet of the cleaning pump 3 is communicated with the box, the outlet is connected with pipeline, and is controlled by the controller 8, and the opening or closing of the cleaning pump 3 is controlled by the switch instruction of the controller 8.

[0027] The front cleaning nozzle 5, rear cleaning nozzle 6, perception sensor cleaning nozzle 7 are connected with the outlet of the cleaning pump 3 by electromagnetic valve 4, and the opening or closing of the cleaning liquid from the front cleaning nozzle 5, rear cleaning nozzle 6, perception sensor cleaning nozzle 7 is controlled by the electromagnetic valve 4.

[0028] When controller 8 receives the signal that certain sensor or certain sensors need to be cleaned, controller 8 outputs the opening signal, controls the operation of cleaning pump 3, and opens the electromagnetic valve 4 of the nozzle corresponding to certain sensor or certain sensors to be cleaned, and the cleaning liquid is sprayed from the corresponding nozzle through cleaning pump 3 and electromagnetic valve 4 in the box, to clean certain sensor or certain sensors, and then close electromagnetic valve 4 and cleaning pump 3 after cleaning.

[0029] As Figures 2-4 Indicated, the side wall of the box 1 is provided with liquid level detection device mounting hole 113, and the liquid level detection device 2 is mounted on the side wall of the box 1 through the liquid level detection device mounting hole 113.

[0030] The side wall of the housing 1 is provided with a recess 16, and a cleaning pump base plate 119, mounting hole 116, buckle 117, and top plate 120 are provided in the recess. The bottom of the cleaning pump 3 is supported by the base plate 119. The inlet 32 ​​of the cleaning pump 3 is installed on the cleaning pump mounting hole 116. The side 31 of the cleaning pump 3 is installed on the side wall of the housing 1 by the buckle 117. The top surface 33 of the cleaning pump 3 is limited by the top plate 120, thereby firmly installing the cleaning pump 3 in the recess 16.

[0031] The bottom of the housing 1 is also provided with a mounting part 115, which is installed on the vehicle's mounting position through the mounting holes on the mounting part 115. Side mounting parts 112 and 118 are provided on the side, which are installed on other positions of the autonomous vehicle through the mounting holes on the side mounting parts 112 and 118, thereby firmly fixing the housing 1 and other components to the autonomous vehicle.

[0032] The box 1 also has a cover 12 and an opening 111.

[0033] The cleaning pump 3 is also provided with a power supply and control signal connection connector 34, which is connected to the controller 8.

[0034] like Figures 4-8 As shown, the liquid level detection device 2 includes a circuit board 22, a magnet 24, a connector 25, a float 26, a fixing component 27, a sealing component 28, and an electrical connector 21.

[0035] One end of the connector 25 is provided with an elastic buckle 253. After the elastic buckle 253 passes through the central hole 261 of the float 26, it will be snapped into place by the elastic head 254.

[0036] The other end of the connector 25 is provided with a fixing part 251. The fixing part 251 has an "I" shaped cross section. Two parallel brackets 274 are provided on the fixing part 27. The middle of the fixing part 251 is inserted into the round holes 271 and 272 of the bracket 274. The inner sides of both ends of the fixing part 251 abut against the outer sides of the bracket 274 respectively. Therefore, the other end of the connector 25 is rotatably fixed on the bracket 274.

[0037] The fixing part 251 has a groove at one end. The magnet 24 is the same shape and size as the groove, is fixed inside the groove, and is sealed by the outer cover 23, which can better seal the magnet 24.

[0038] The circuit board 22 is mounted on the magnet mounting portion of the fixing member 27. A Hall element 222 is mounted on the circuit board 22, so that the Hall element 222 is directly opposite the magnet 24 mounted in the fixing portion 251. The initial positional relationship is shown in [reference needed]. Figure 7 .

[0039] The fixing part 273 of the fixing member 27 is provided with a first recess 275, and the sealing member 28 is embedded in the first recess 275, and the sealing member 28 is provided with a second recess, and the edge of the liquid level detection device mounting hole 113 is clamped in the second recess, so that the sealing is better.

[0040] The electric connector 21 is connected to the fixing member 27, the electric connector 21 is connected to the controller 8, and the electric connection ends 211, 212 and 213 of the electric connector 21 are connected to the electric connector 221 on the circuit board 22, and the Hall element 222 provides the corresponding voltage signal measured by the controller.

[0041] The initial position of the magnet 24 is that the N pole faces the vertical upward direction and the S pole faces the vertical downward direction, and as the water level changes, the connecting member 25 rotates, for example, if the water level rises, the connecting member 25 rotates upward, and then the magnet 24 rotates clockwise, and if the water level falls, the connecting member 25 rotates downward, and then the magnet 24 rotates counterclockwise, and the Hall element 222 changes its output voltage under the influence of the angle of rotation of the magnet 24, and the magnetic field direction of the magnet 24 and the output voltage of the Hall sensor have a linear relationship, and the linear relationship of the embodiment is shown in Figure 7 、 8 .

[0042] The box body 1 is provided with the fixing member 27 for installing the liquid level detection device, and specifically, the fixing member 27 is installed on the mounting hole 113 of the box body 1.

[0043] The box body 1 is also provided with a support strip 114 for supporting the fixing member 27.

[0044] As shown in Figure 3 , when the float 26 of the connecting member 25 of the liquid level detection device hits the bottom of the box body, the angle between the connecting member 25 and the vertical direction is θ1, that is, the angle between the magnetic field of the magnet 24 and the Hall element 222 is θ1, and when the float 26 rises to the highest position, the angle between the connecting member 25 and the vertical direction is θ2, that is, the angle between the magnetic field of the magnet 24 and the Hall element 222 is θ2, and since the magnetic field direction of the magnet 24 and the output voltage of the Hall sensor have a linear relationship, the output voltage of the Hall sensor can be measured, and then the height of the float in the box body 1, that is, the height of the liquid level, can be calculated according to the linear relationship between the angle of the magnet 24 and the Hall sensor.

Claims

1. A liquid level detection device, characterized by: The system includes a circuit board, a magnet, a connector, a float, and a fixing component. One end of the connector is fixed to the float, and the other end has a fixing part rotatably connected to the fixing component. The fixing component is mounted on the side of the housing. The circuit board is mounted on the magnet mounting part of the fixing component. A Hall element is mounted on the circuit board, aligning the Hall element with the magnet in the magnet mounting part. When the float is subjected to buoyancy by the liquid, it causes the magnet to rotate, changing the output voltage of the Hall element. The Hall element provides a measured voltage signal to the controller. The controller determines the rotation angle of the connector based on the relationship between the output voltage of the Hall sensor and the magnetic field of the magnet, thereby calculating the liquid level.

2. The liquid level detection device according to claim 1, characterized in that: The cross-section of the fixing part is "I" shaped. Two parallel brackets are provided on the fixing part. The middle of the fixing part is inserted into the round hole of the two brackets. The inner sides of the two ends of the fixing part abut against the outer sides of the two brackets respectively.

3. The liquid level detection device according to claim 1, characterized in that: One end of the fixing part is provided with a groove, the magnet is the same shape and size as the groove and is fixed inside the groove, and is sealed by the outer cover.

4. The liquid level detecting device according to claim 1, characterized by: One end of the connector is provided with an elastic buckle. After the elastic buckle passes through the central hole of the float, the float is secured by the elastic head popping out.

5. A cleaning system for an unmanned vehicle, characterized by: The device includes a housing, a liquid level detection device, a cleaning pump, a solenoid valve, a nozzle, and a controller. The liquid level detection device and the cleaning pump are respectively installed on the housing. The liquid level detection device is the liquid level detection device according to any one of claims 1-4. The liquid level detection device is connected to the controller and transmits the liquid level signal detected by the liquid detection device to the controller and calculates the liquid level in real time. The controller judges the liquid level information. If the liquid level is too low, it outputs liquid replenishment information and inputs the corresponding liquid from the outside. If the liquid level is normal, it is in a standby state. The nozzle is connected to the outlet of the cleaning pump through the solenoid valve. The cleaning pump and the solenoid valve are controlled by the controller. The opening and closing of the cleaning pump and the solenoid valve control the cleaning fluid to spray out of the nozzle or close it to clean the corresponding type of sensor.

6. The cleaning system of the driverless vehicle of claim 5, wherein: The nozzles are a front cleaning nozzle, a rear cleaning nozzle, and a sensor cleaning nozzle.

7. The cleaning system of the driverless vehicle of claim 5, wherein: The side wall of the box is recessed, and the cleaning pump is fixed in the recess.

8. The cleaning system of the driverless vehicle according to claim 7, wherein: The recessed area is equipped with a bottom plate, a buckle, and a top plate. The bottom of the cleaning pump is supported by the bottom plate, the side of the cleaning pump is installed on the side wall of the box by the buckle, and the top surface of the cleaning pump is limited by the top plate.

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