Ionic wind cleaning system of pilotless automobile perception sensor

Abstract

According to the ionic wind cleaning system of the pilotless automobile perception sensor, an exhaust connector of an air pump is communicated with an air inlet connector of an air storage tank, a water inlet connector of an electromagnetic drain valve is communicated with a drain connector of the air storage tank, a liquid level sensor and a pressure sensor are installed on the air storage tank, and an air outlet connector of the air storage tank is communicated with an air inlet connector of an electromagnetic exhaust valve. An ion generator is arranged in the electromagnetic exhaust valve, ions generated by the ion generator and compressed air form ion wind together, and the air outlet connector is communicated with the nozzle; when the pressure sensor senses that the air pressure in the air storage tank reaches a set standard value, the pressure sensor feeds back a signal to the automobile control system, and the automobile control system stops the air pump immediately; when an automobile control system receives a feedback signal indicating that one or more sensing sensors are polluted, the corresponding electromagnetic exhaust valves are opened immediately, ion generators in the electromagnetic exhaust valves are started synchronously to generate ions, and ion wind cleans the sensing sensors through nozzles.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of cleaning systems of unmanned vehicle perception sensor, in particular to a kind of ion wind cleaning system of unmanned vehicle perception sensor. BACKGROUND

[0002] With the continuous progress of science and technology, the automobile industry has developed rapidly, and unmanned vehicles have begun to be gradually applied and have a wide market prospect. Unmanned vehicles need to install many perception sensors, such as optical sensors and radars, to detect the environment around the vehicle to provide accurate information to the vehicle control system for correct control and driving of the vehicle. Therefore, the cleanliness of the perception sensor is very important to ensure the accuracy of the collected data information.

[0003] Due to the influence of environmental factors, the perception sensor will inevitably be contaminated, so it is urgent to develop a cleaning system for the perception sensor of an unmanned vehicle, which can be started to clean the perception sensor after it is contaminated, maintain the cleanliness of the perception sensor and ensure the accuracy of the collected data information. SUMMARY

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an ion wind cleaning system for the perception sensor of an unmanned vehicle, which can clean the perception sensor of the unmanned vehicle to ensure that the perception sensor can work normally.

[0005] The utility model discloses a technical scheme that solves the problem: unmanned vehicle perception sensor's ion wind cleaning system, including air pump, gas storage tank, electromagnetic drain valve, liquid level sensor, pressure sensor, electromagnetic exhaust valve, nozzle, the air pump's exhaust joint with the air inlet joint of gas storage tank intercommunication, the water inlet joint of electromagnetic drain valve and the drainage joint of gas storage tank intercommunication, liquid level sensor, pressure sensor install on gas storage tank, the air outlet joint of gas storage tank with the air inlet joint of electromagnetic exhaust valve intercommunication, set up ion generator in electromagnetic exhaust valve, and the ion of ion generator generates together with compressed gas forms ion wind, and the air outlet joint with nozzle intercommunication, when pressure sensor senses that the gas pressure reaches the set standard value in gas storage tank, pressure sensor just feeds back the signal to automobile control system, and automobile control system stops air pump work immediately, when automobile control system receives the feedback signal of one or more perception sensors being contaminated, just open corresponding electromagnetic exhaust valve, and simultaneously start the ion generator in electromagnetic exhaust valve and produce ion, and the ion wind is cleaned to perception sensor through nozzle, the electromagnetic drain valve sets up at the bottom of gas storage tank, when liquid level sensor detects that the liquid water reaches the set upper limit water level in gas storage tank, liquid level sensor feeds back the signal to automobile control system, and automobile control system just opens electromagnetic drain valve and discharges the liquid water in gas storage tank from the drainage port of electromagnetic drain valve setting.

[0006] Better, the motor used by the air pump adopts a brushless motor, which can reduce the interference of EMC electromagnetic interference on other electronic devices or control systems of the automobile when the air pump is working, and also can reduce noise and prolong service life.

[0007] Better, the air pump includes an upper cover component, a brushless motor, a cylinder and a lower cover component; the cylinder includes a cylinder support, a cylinder sleeve and an eccentric shaft, the cylinder sleeve is fixed on the cylinder support, the brushless motor includes a stator assembly and a rotor assembly, a rotor housing of the rotor assembly is fixed on a motor shaft through interference fit, the motor shaft is connected with the eccentric shaft of the cylinder, the stator assembly includes a hollow shaft, the hollow shaft is fixed on the cylinder support through interference fit, the lower cover component includes a protruding edge, an annular damping pad is attached to the protruding edge, and the edge of the upper cover component and the edge of the lower cover component are fixed together, a plurality of positioning bosses are arranged on the edge of the lower cover ring to position the edge of the annular damping pad, a plurality of bosses are arranged on the upper cover to axially position the annular damping pad, thereby the cylinder support is firmly mounted by the edge of the upper cover component and the lower cover component, ensuring reliable fixation of the brushless motor and the cylinder, and the brushless motor and the cylinder are damped by the annular damping pad, which can reduce the transmission and diffusion of vibration during the operation of the air pump, reduce noise and prevent the brushless motor and the cylinder from loosening.

[0008] Better, the inner hole of the hollow shaft of the stator assembly is fixed with the left and right ball bearings, and a bushing is arranged between the left and right ball bearings to axially position the left and right ball bearings.

[0009] Better, the upper cover component comprises an upper cover, a bushing and a damping ring, the damping ring is provided with an annular groove and is fixed in the mounting hole of the upper cover, and the bushing is mounted in the inner hole of the damping ring, so that the transmission and diffusion of vibration during the operation of the air pump are reduced, and the influence on the environment of the automobile is reduced.

[0010] Better, the lower cover component comprises a lower cover, a bushing and a damping ring, the damping ring is provided with an annular groove and is fixed in the mounting hole of the lower cover, and the bushing is mounted in the inner hole of the damping ring, so that the transmission and diffusion of vibration during the operation of the air pump are reduced, and the influence on the environment of the automobile is reduced.

[0011] Better, the nozzle is a telescopic air blowing nozzle, which is automatically raised to a set height before cleaning the sensing sensor with high-pressure ion wind, and is automatically retracted to the original position after cleaning is completed, so that the nozzle installed on the outer surface of the automobile with appearance requirements will not affect the appearance of the automobile due to the protrusion, and will not cause harm to pedestrians.

[0012] Better, the dustproof pad is arranged at the lower end of the nozzle head, which can prevent dust from entering the inside of the shell and affecting the sliding sealing effect of the piston ring and the inner circular surface of the shell.

[0013] Compared with the prior art, the ion wind blowing cleaning system of the unmanned vehicle sensing sensor of the utility model has the advantages that: the ion wind is arranged to improve the cleaning capacity of the cleaning system. When the sensing sensor is polluted and cannot be normally used, the ion wind blowing cleaning system is started to clean the dust and restore the cleanliness requirement of the sensing sensor. When the pollution of the sensing sensor is relatively serious, the existing cleaning system is started to clean the sensing sensor, and then the ion wind cleaning system is started to clean and dry the cleaning liquid remaining on the sensing sensor, so that the cleanliness requirement of the sensing sensor is restored, the sensing sensor of the automobile can be normally used, the accuracy of the collected data information is ensured, and the normal driving and safety of the automobile are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a three-dimensional schematic view of the ion wind cleaning system of the unmanned vehicle sensing sensor of the utility model embodiment.

[0015] Figure 2 is a structural schematic view of the air pump of the utility model embodiment.

[0016] Figure 3It is the exploded schematic view of the upper cover component of the embodiment of the utility model.

[0017] Figure 4 It is the exploded schematic view of the brushless motor of the embodiment of the utility model.

[0018] Figure 5 It is the exploded schematic view of the cylinder of the embodiment of the utility model.

[0019] Figure 6 It is the exploded schematic view of the lower cover component of the embodiment of the utility model.

[0020] Figure 7 It is the three-dimensional schematic view of the cylinder sleeve of the embodiment of the utility model.

[0021] Figure 8 It is Figure 2 The enlarged schematic view of the air outlet of partial A.

[0022] Figure 9 It is Figure 2 The enlarged schematic view of partial A.

[0023] Figure 10 It is the structural schematic view of the telescopic blowing nozzle of the embodiment of the utility model when not working.

[0024] Figure 11 It is the structural schematic view of the telescopic blowing nozzle of the embodiment of the utility model when working.

[0025] Figure 12 It is the three-dimensional schematic view of the transmission rod of the embodiment of the utility model. Specific implementation

[0026] The utility model is further explained in combination with the drawings and embodiments.

[0027] As Figures 1-12 Indicated, the ion wind cleaning system of the unmanned vehicle sensing sensor includes air pump 1, air storage tank 2, electromagnetic drain valve 3, liquid level sensor 4, pressure sensor 5, electromagnetic exhaust valve 6, fixed blowing nozzle 7 and telescopic blowing nozzle 8.

[0028] The air pump 1 is provided with an exhaust joint 1301 connected to the air inlet joint 25 of the air tank 2 through an air pipe, the electromagnetic water drain valve 3 is provided with a water inlet joint 31 connected to the water drain joint 21 of the air tank 2 through a water pipe, the liquid level sensor 4 is installed on the fixing hole 22 of the air tank 2, the pressure sensor 5 is installed on the fixing hole 23 of the air tank 2, the air outlet joint 24 of the air tank 2 is connected to the air inlet joint 61 of the electromagnetic exhaust valve 6 through a plurality of air pipes, a part of the air outlet joint 62 of the electromagnetic exhaust valve 6 is connected to the air inlet joint 71 of the fixed blowing nozzle 7 through an air pipe, and the other part of the air outlet joint 62 of the electromagnetic exhaust valve 6 is connected to the air inlet joint 8042 of the telescopic blowing nozzle 8 through an air pipe.

[0029] The air pump 1 comprises an upper cover part 11, a brushless motor 12, a cylinder 13 and a lower cover part 14.

[0030] The upper cover part 11 comprises an upper cover 1101, a bushing 1102 and a damping ring 1103, the damping ring 1103 is provided with an annular groove 11031 fixed in the upper cover 1101 through the cooperation of the mounting hole 11014, and the bushing 1102 is installed in the inner hole 11032 of the damping ring 1103, which can reduce the transmission and diffusion of vibration during the operation of the air pump.

[0031] The brushless motor 12 comprises a stator assembly 1201, a rotor assembly 1202 and a plug-in assembly 1203.

[0032] The inner hole 120112 of the lamination winding part 12011 of the stator assembly 1201 is fixed on the hollow shaft 12013 by interference fit with the outer circular surface 120131 of the hollow shaft 12013, and the wiring clip 12031 of the plug-in assembly 1203 fixes and conducts the winding wire head 120113 of the lamination winding part 12011.

[0033] The left ball bearing 12012 and the right ball bearing 12015 of the stator assembly 1201 are fixed in the inner hole 120132 of the hollow shaft 12013, and the shaft sleeve 12014 is arranged between the left ball bearing 12012 and the right ball bearing 12015 to axially position the left ball bearing 12012 and the right ball bearing 12015.

[0034] The permanent magnet magnetic ring 12022 of the rotor assembly 1202 is fixed in the rotor shell 12021 by interference fit, the inner hole 120212 of the rotor shell 12021 is fixed on the motor shaft 12023 by interference fit, the copper ring 12016 is arranged between the rotor shell 12021 and the right ball bearing 12015 for axial positioning, the elastic stop ring 12024 is installed in the stop ring groove 120232 of the motor shaft 12023 for axial positioning of the motor shaft 12023, the outer circular surface of the rotor shell 12021 of the rotor assembly 1202 forms a gap with the inner hole 11013 of the upper cover 1101, the inner circular surface 120222 of the permanent magnet magnetic ring 12022 forms an air gap with the outer circular surface 120111 of the laminated winding component 12011, and the rotor assembly 1202 can rotate along the axis.

[0035] The cylinder 13 includes an exhaust joint 1301, a sealing ring 1302, an annular damping pad 1303, a cylinder support 1304, a cylinder cover 1305, a compression spring 1306, a sealing seat 1307, a fixing screw 1308, a sealing ring 1309, a cylinder sleeve 1310, a piston ring 1311, a fixing screw 1312, a piston connecting rod 1313, an elastic stop ring 1314, a gasket 1315, a ball bearing 1316, a coupling shaft 1317, and an eccentric wheel 1318.

[0036] The outer circular surface 120131 of the hollow shaft 12013 is fixed on the cylinder support 1304 by interference fit through the fixing hole 13042 of the cylinder support 1304.

[0037] The eccentric wheel 1318 of the cylinder 13 is fixedly connected with the motor shaft 12023 by interference fit through the flat hole 13181 of the eccentric wheel 1318 and the shaft flat 120233 of the motor shaft 12023, the coupling shaft 1317 is fixedly connected with the eccentric wheel 1318 by interference fit through the shaft flat 13172 of the coupling shaft 1317 and the flat hole 13182 of the eccentric wheel 1318, the ball bearing 1316 is fixed in the inner hole 13135 of the piston connecting rod 1313, the gasket 1315 is arranged on the left side of the ball bearing 1316, and the elastic stop ring 1314 is installed in the annular groove 13171 of the coupling shaft 1317 for axial positioning of the piston connecting rod 1313.

[0038] The cylinder support 1304 is provided with a plurality of mounting holes 13041, and the cylinder sleeve 1310 is fixed on the cylinder support 1304 by connecting the threaded holes 13106 of the cylinder sleeve 1310 with the fixing screws 1312.

[0039] The piston ring 1311 is installed in the annular groove 13133 provided in the piston connecting rod 1313, and the piston ring 1311 can move up and down in the annular groove 13133. When the piston connecting rod 1313 runs downward, the piston ring 1311 moves upward and tightly abuts the upper side surface 13132 of the annular groove, and air can enter the cylinder liner 1310 through the air inlet hole 13131 provided in the piston connecting rod 1313. See Figure 8 When the piston connecting rod 1313 runs upward, the piston ring 1311 moves downward and tightly abuts the lower side surface 13134 of the annular groove to form a seal. The outer circular surface 13111 of the piston ring 1311 forms a sliding seal with the inner circular surface 13105 of the cylinder liner 1310. See Figure 9 .

[0040] The cylinder head 1305 is provided with a plurality of screw holes 13053 and is connected with the threaded holes 13104 provided in the cylinder liner 1310 through the fixing screws 1308 to be fixed on the cylinder liner 1310.

[0041] The sealing seat 1307 is installed in the annular step 13102 provided in the cylinder liner 1310, and the compression spring 1306 is provided at the annular step 13051 of the cylinder head 1305. The compression spring 1306 presses the sealing seat 1307, so that the sealing surface 13071 of the sealing seat 1307 forms a seal with the annular step 13102 of the cylinder liner 1310.

[0042] The sealing ring 1309 is installed in the annular groove 13103 provided in the cylinder liner 1310 to form a seal between the cylinder head 1305 and the cylinder liner 1310.

[0043] The exhaust joint 1301 is fixed in the exhaust hole 13054 provided in the cylinder head 1305, and the sealing ring 1302 is provided to form a seal between the exhaust joint 1301 and the cylinder head 1305.

[0044] The lower cover part 14 includes a lower cover 1401, a bushing 1402, and a damping ring 1403.

[0045] The damping ring 1403 is provided with an annular groove 14031 which cooperates with the mounting hole 14012 provided in the lower cover 1401. The annular groove 14031 is fixed in the mounting hole 14012, and the bushing 1402 is installed in the inner hole 14032 provided in the damping ring 1403. Thus, the transmission and diffusion of vibration during the operation of the air pump can be reduced, and the impact on the environment of the automobile can be reduced.

[0046] The annular damping pad 1303 is fixed on the cylinder support 1304 through the annular groove 13031 provided therein.

[0047] The lower cover part 14 also includes a protruding edge 14013, the annular damping pad 1303 is attached to the protruding edge 14013, and the upper cover part 11 edge and the lower cover part 14 edge are fixed together, the lower cover 1401 ring edge is also provided with a plurality of positioning bosses 14011 for positioning the edge of the annular damping pad 1303, and the upper cover 1101 is also provided with a plurality of bosses 11011 for axially positioning the annular damping pad 1303, thereby firmly mounting the cylinder bracket 1304 by the upper cover part 11 edge and the lower cover part 14, ensuring that the brushless motor 12 and the cylinder 13 are fixed reliably, and the brushless motor 12 and the cylinder 13 are damped by the annular damping pad 1303, which can reduce the transmission and diffusion of vibration during the operation of the air pump, reduce noise, and prevent the brushless motor 12 and the cylinder 13 from loosening.

[0048] The air tank 2 is provided with an air inlet joint 25 which is communicated with the air outlet joint 1301 of the air pump through an air pipe, a drain joint 21 which is connected and communicated with the water inlet joint 31 of the electromagnetic drain valve 3 through a water pipe, a fixing hole 22 for mounting a liquid level sensor 4, a fixing hole 23 for mounting a pressure sensor 5, and an air outlet joint 24 which is connected and communicated with the air inlet joint 61 of a plurality of branch electromagnetic exhaust valves 6 through an air pipe.

[0049] When the brushless motor 12 is working, the motor shaft 12023 drives the eccentric wheel 1318 to rotate, the eccentric wheel 1318 drives the piston connecting rod 1313 to move upward through the connecting shaft 1317, the air in the cylinder sleeve 1310 is compressed, the pressure gradually increases, and when the pressure rises to a set value, the sealing seat 1307 is pushed to extrude the compression spring 1306 to open the sealing seat 1307, the air with pressure flows to the air outlet joint 1301 and enters the air tank 2 through the air pipe; when the piston connecting rod 1313 moves downward, the air pressure in the cylinder sleeve 1310 decreases until the compression spring 1306 closes the sealing seat 1307, a negative pressure is formed in the cylinder sleeve 1310, and air enters the cylinder sleeve 1310 through the air inlet hole 13131 of the piston connecting rod 1313, so as to realize the air charging of the air tank 2 by the air pump 1; when the pressure sensor 5 detects that the air pressure in the air tank 2 reaches a set standard value, the pressure sensor 5 feeds back a signal to the automobile control system, and the automobile control system immediately stops the operation of the air pump 1.

[0050] Because the air contains moisture, the moisture will condense and form liquid water as the gas is compressed and stored in the air tank 2; when the liquid level sensor 4 detects that the liquid water in the air tank 2 reaches a set upper limit water level, the liquid level sensor 4 feeds back a signal to the automobile control system, and the automobile control system immediately opens the electromagnetic drain valve 3 to discharge the liquid water in the air tank 2 from the drain port 32 of the electromagnetic drain valve 3 to stop emptying.

[0051] The electromagnetic exhaust valve 6 is provided with an ion generator 63 at the air flow channel. When the high-pressure gas flows through the ion generator 63, the high-pressure ion wind generated thereby has a better cleaning effect on the sensing sensor than the ordinary high-pressure wind, and can clean the sensing sensor thoroughly.

[0052] The fixed blowing nozzle 7 is provided with an air inlet joint 71 connected to the air outlet joint 62 of the electromagnetic exhaust valve 6 through an air pipe, and the high-pressure ion wind is blown out of the blowing port 72 to clean the sensing sensor such as an optical sensor or a radar.

[0053] The telescopic blowing nozzle 8 includes a nozzle head 801, a dustproof pad 802, an end cap 803, a shell 804, a compression spring 805, a piston ring 806, a transmission rod 807, a nozzle body 808, and a sealing sleeve 809.

[0054] The piston ring 806 is installed in the annular groove 8074 of the transmission rod 807, and the piston ring 806 and the inner wall 8041 of the shell 804 form a sliding seal.

[0055] The sealing sleeve 809 is installed on the outer circular surface 8072 of the transmission rod 807 to form an elastic seal, and two exhaust ports 8071 are symmetrically arranged on the upper part of the transmission rod 807,

[0056] The nozzle body 808 is fixed on the transmission rod 807 by cooperating the bayonet 8082 of the nozzle body 808 with the clamping table 8073 of the transmission rod 807, and the annular step 8083 of the nozzle body 808 cooperates with the annular boss 8091 of the sealing sleeve 809 to form a seal,

[0057] The compression spring 805 is sleeved on the outer circular surface of the nozzle body 808, and the upper end is limited by the shell 804, and the lower end is limited by the transmission rod.

[0058] The end cap 803 is provided with a bayonet 8031, which cooperates with the clamping buckle 8043 of the shell 804 to be fixed.

[0059] The nozzle head 801 is fixed on the upper end of the nozzle body 808, and the inner circular surface 8011 of the nozzle head 801 forms a seal with the sealing convex ring 8081 of the nozzle body 808.

[0060] The dustproof pad 802 is arranged above the sealing position of the end cap 803 and the nozzle body 808, and the dustproof pad 802 is fixed on the nozzle head 801. The dustproof pad 802 can prevent dust from entering the inside of the shell 804 and affecting the sliding sealing effect of the piston ring 806 and the inner wall 8041 of the shell 804.

[0061] The high-pressure ion wind entering from the air inlet joint 8042 drives the transmission rod 807 and the nozzle body 808 to run upwards and compress the compression spring 805 when the telescopic blowing nozzle 8 is working. When the compression spring 805 cannot be compressed any more, the nozzle body 808 runs to the uppermost position. Then, the gas pressure in the shell 804 gradually increases, and the elastic sealing sleeve 809 is opened when the pressure reaches the set standard value. The high-pressure ion wind is discharged from the exhaust port 8071 of the transmission rod 807, flows to the nozzle head 801, and is blown out from the blowing port 8012 of the nozzle head 801 to clean the optical sensor or radar. After cleaning, the air inlet is stopped, the gas pressure in the shell decreases, the sealing sleeve 809 is retracted to close the air inlet, and the transmission rod 807 and the nozzle body 808 are reset to the initial position under the elastic force of the compression spring 805. Therefore, the telescopic blowing nozzle 8 is installed on the outer surface of the car with appearance requirements, which will not affect the appearance of the car due to the protrusion, and will not cause harm to pedestrians.

[0062] When the car control system receives a feedback signal that one or more optical sensors or radars are contaminated, the electromagnetic exhaust valve 6 of the corresponding branch is immediately opened, and the ion generator 63 in the electromagnetic exhaust valve 6 is started synchronously. The high-pressure ion wind flows into the fixed blowing nozzle 7 through the air pipe and is blown out from the blowing port 72 to clean the contaminated optical sensor or radar. If the telescopic blowing nozzle 8 is arranged in the corresponding branch, the high-pressure ion wind will push the nozzle head 801 of the telescopic blowing nozzle 8 to extend to the uppermost position, and then the high-pressure ion wind is blown out from the blowing port 8012 of the telescopic nozzle head 801 to clean the optical sensor or radar, so as to ensure the cleanliness of the car perception sensor and the accuracy of the collected data information, thereby ensuring the normal driving and safety of the car.

[0063] It should be noted that the directions of the inside, outside, left, right, up, down, and the like mentioned in the embodiments and the present application file are only for convenient description and are only for the specific direction determined during description, and do not constitute a limitation on the content and protection scope of the present application.

Claims

1. An ion wind cleaning system for autonomous vehicle perception sensors, characterized by: The air pump is connected with the air inlet joint of the air tank, the water inlet joint of the electromagnetic drain valve is communicated with the drain joint of the air tank, the liquid level sensor and the pressure sensor are installed on the air tank, the air outlet joint of the air tank is communicated with the air inlet joint of the electromagnetic exhaust valve, the ion generator is arranged in the electromagnetic exhaust valve, the ion generated by the ion generator forms ion wind together with the compressed gas, and the air outlet joint is communicated with the nozzle.

2. The ion wind cleaning system for autonomous vehicle perception sensors of claim 1, wherein: The air pump adopts a brushless motor.

3. The ion wind cleaning system for autonomous vehicle perception sensors of claim 1, wherein: The air pump comprises an upper cover part, a brushless motor, a cylinder and a lower cover part.

4. The ion wind cleaning system for autonomous vehicle perception sensors of claim 3, wherein: The inner hole of the hollow shaft of the stator assembly is fixed with left and right ball bearings, and a shaft sleeve is arranged between the left and right ball bearings to axially position the left and right ball bearings.

5. The ion wind cleaning system for autonomous vehicle perception sensors of claim 3, wherein: The upper cover part comprises an upper cover, a bushing and a damping ring.

6. The ion wind cleaning system for autonomous vehicle perception sensors of claim 3, wherein: The lower cover part comprises a lower cover, a bushing and a damping ring.

7. The ion wind cleaning system for autonomous vehicle perception sensors of claim 1, wherein: The nozzle is a telescopic air blowing nozzle.

8. The ion wind cleaning system for autonomous vehicle perception sensors of claim 7, wherein: The nozzle head lower end is provided with a dustproof pad.

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