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 invention relates to a cleaning system for a perception sensor of an unmanned vehicle, and in particular to an ion wind cleaning system for a perception sensor of an unmanned vehicle. Background Art

[0002] With the continuous advancement of science and technology, the automobile industry has achieved rapid development. Autonomous vehicles have begun to be gradually applied and have broad market prospects. Autonomous vehicles need to be equipped with many perception sensors, such as optical sensors and radars, to detect the vehicle's surrounding environment to provide accurate information to the vehicle control system to correctly control and drive the vehicle. Therefore, the cleanliness of the perception sensors is very important to ensure the accuracy of the collected data information.

[0003] Due to the influence of environmental factors, perception sensors will inevitably be contaminated, so there is an urgent need to develop a cleaning system for driverless car perception sensors. After the perception sensors are contaminated, the system can be turned on to clean them, maintain the cleanliness requirements of the vehicle perception sensors, and ensure the accuracy of the collected data information. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned deficiencies in the prior art and provide an ion wind cleaning system for the perception sensor of an unmanned vehicle, so that the perception sensor of the unmanned vehicle can be cleaned to ensure that the perception sensor can work normally.

[0005] The technical solution adopted by the present invention to solve the above-mentioned problem is as follows: an ion wind cleaning system for a sensing sensor of an unmanned vehicle comprises an air pump, an air storage tank, an electromagnetic drain valve, a liquid level sensor, a pressure sensor, an electromagnetic exhaust valve and a nozzle. The exhaust joint of the air pump is connected to the air inlet joint of the air storage tank, the water inlet joint of the electromagnetic drain valve is connected to the drain joint of the air storage tank, the liquid level sensor and the pressure sensor are installed on the air storage tank, the air outlet joint of the air storage tank is connected to the air inlet joint of the electromagnetic exhaust valve, an ion generator is arranged in the electromagnetic exhaust valve, the ions generated by the ion generator form ion wind together with the compressed gas, and the air outlet joint is connected to the nozzle; when the pressure sensor senses the air storage tank, the air When the air pressure in the tank reaches the set standard value, the pressure sensor will feedback a signal to the vehicle control system, and the vehicle control system will immediately stop the air pump; when the vehicle control system receives a feedback signal that one or more sensing sensors are contaminated, it will immediately open the corresponding electromagnetic exhaust valve, and synchronously start the ion generator in the electromagnetic exhaust valve to generate ions, and the ion wind will clean the sensing sensor through the nozzle; the electromagnetic drain valve is set at the bottom of the gas tank, and when the liquid level sensor detects that the liquid water in the gas tank reaches the set upper limit water level, the liquid level sensor will feedback a signal to the vehicle control system, and the vehicle control system will immediately open the electromagnetic drain valve to discharge the liquid water in the gas tank from the drain port set by the electromagnetic drain valve.

[0006] Preferably, the motor used in the air pump is a brushless motor, which can reduce the interference of EMC electromagnetic interference on other electronic equipment or control systems of the car when the air pump is working, and can also reduce noise and extend service life.

[0007] Preferably, the air pump comprises an upper cover component, a brushless motor, a cylinder and a lower cover component; the cylinder comprises a cylinder bracket, a cylinder sleeve, and an eccentric shaft, the cylinder sleeve is fixed on the cylinder bracket, the brushless motor comprises a stator assembly and a rotor assembly, the rotor housing of the rotor assembly is fixed to the motor shaft by an interference fit, the motor shaft is connected to the eccentric shaft of the cylinder, the stator assembly comprises a hollow shaft, the hollow shaft is fixed to the cylinder bracket by an interference fit, the lower cover component comprises a flange, an annular reducer The vibration pad is attached to the protruding edge, and then relatively fixed together by the edge of the upper cover component and the edge of the lower cover component. A plurality of positioning bosses are also provided on the edge of the lower cover ring to position the edge of the annular vibration damping pad. The upper cover is also provided with a plurality of bosses to perform axial positioning of the annular vibration damping pad, so that the cylinder bracket is firmly mounted by the edge of the upper cover component and the lower cover component to ensure that the brushless motor and the cylinder are reliably fixed. Moreover, the brushless motor and the cylinder are damped by the annular vibration 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] Preferably, a left ball bearing and a right ball bearing are fixed in the inner hole of the hollow shaft of the stator assembly, and a sleeve is provided between the left ball bearing and the right ball bearing to perform axial positioning on the left ball bearing and the right ball bearing.

[0009] Preferably, the upper cover component includes an upper cover, a bushing and a vibration-damping ring. The vibration-damping ring is provided with an annular groove, which cooperates with and is fixed in the mounting hole provided in the upper cover. The bushing is installed in the inner hole of the vibration-damping ring. This can reduce the transmission and diffusion of vibration during the operation of the air pump and reduce the impact on the automobile environment.

[0010] Preferably, the lower cover component includes a lower cover, a bushing and a vibration damping ring; the vibration damping ring is provided with an annular groove which cooperates with the mounting hole of the lower cover, the annular groove is fixed in the mounting hole, and the bushing is installed in the inner hole of the vibration damping ring, thereby reducing the transmission and diffusion of vibration during the operation of the air pump and reducing the impact on the automobile environment.

[0011] Preferably, the nozzle is a telescopic air blowing nozzle, which automatically rises to a set height before performing high-pressure ion wind cleaning on the sensing sensor and then performs cleaning, and automatically retracts back to its original position after cleaning. In this way, when it is installed on an exterior surface of a car with appearance requirements, it will not affect the appearance of the car due to protrusions, and will not cause harm to pedestrians.

[0012] Preferably, a dustproof pad is arranged at the lower end of the nozzle head to prevent dust from entering the interior of the housing and affecting the sliding sealing effect between the piston ring and the inner circular surface of the housing.

[0013] Compared with the prior art, the advantages of the present invention are: due to the provision of ion wind, the cleaning ability of the cleaning system is improved. When the vehicle perception sensor is contaminated and cannot be used normally, the ion wind blowing cleaning system is started to remove the dust and restore the cleanliness requirements of the vehicle perception sensor; when the perception sensor is seriously contaminated, the existing cleaning system can be started first to clean the perception sensor, and then the ion wind cleaning system can be started to remove and dry the cleaning liquid remaining on the vehicle perception sensor to restore the cleanliness requirements of the vehicle perception sensor, thereby ensuring that the vehicle can use the vehicle perception sensor normally, ensuring the accuracy of the collected data information, and thus ensuring the normal driving and safety of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic diagram of an ion wind cleaning system of a perception sensor for an unmanned vehicle according to an embodiment of the present invention.

[0015] Figure 2 Schematic diagram of the structure of an air pump according to an embodiment of the present invention.

[0016] Figure 3 It is a schematic diagram of an exploded view of an upper cover component according to an embodiment of the present invention.

[0017] Figure 4 Schematic diagram of an exploded view of a brushless motor according to an embodiment of the present invention.

[0018] Figure 5 2 is an exploded schematic diagram of a cylinder according to an embodiment of the present invention.

[0019] Figure 6 It is a schematic diagram of the exploded view of the lower cover component of an embodiment of the present invention.

[0020] Figure 7 2 is a three-dimensional schematic diagram of a cylinder liner according to an embodiment of the present invention.

[0021] Figure 8 yes Figure 2 An enlarged schematic diagram of the exhaust of part A.

[0022] Fig. 9 yes Figure 2 An enlarged schematic diagram of local A.

[0023] Fig.10 It is a schematic structural diagram of the telescopic air blowing nozzle of an embodiment of the present invention when not in operation.

[0024] Fig.11 It is a schematic structural diagram of the telescopic air blowing nozzle of an embodiment of the present invention when in operation.

[0025] Fig.12 2 is a three-dimensional schematic diagram of a transmission rod according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] like Figure 1-12 As shown, the ion wind cleaning system of the driverless car perception sensor includes an air pump 1, an air storage tank 2, an electromagnetic drain valve 3, a liquid level sensor 4, a pressure sensor 5, an electromagnetic exhaust valve 6, a fixed air blowing nozzle 7 and a telescopic air blowing nozzle 8.

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

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

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

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

[0032] The inner hole 120112 of the laminated winding component 12011 of the stator assembly 1201 and the outer cylindrical surface 120131 of the hollow shaft 12013 are fixed to the hollow shaft 12013 by interference fit, and the wiring clip 12031 of the plug-in assembly 1203 fixes and conducts the winding wire end 120113 of the laminated winding component 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 a sleeve 12014 is arranged between the left ball bearing 12012 and the right ball bearing 12015 to perform axial positioning on the left ball bearing 12012 and the right ball bearing 12015.

[0034] The permanent magnet ring 12022 of the rotor assembly 1202 and the rotor housing 12021 are fixed in the rotor housing 12021 by interference fit, and the inner hole 120212 of the rotor housing 12021 and the motor shaft are fixed to the motor shaft 12023 by interference fit. A copper ring 12016 is set between the rotor housing 12021 and the right ball bearing 12015 for axial positioning. An elastic retaining ring 12024 is installed in the retaining ring groove 120232 set on the shaft 12023 to axially position the motor shaft 12023. The outer cylindrical surface of the rotor shell 12021 of the rotor assembly 1202 and the inner hole 11013 of the upper cover 1101 form a gap, and the inner cylindrical surface 120222 of the permanent magnet ring 12022 and the outer cylindrical surface 120111 of the laminated winding component 12011 form an air gap. The rotor assembly 1202 can rotate along the axis.

[0035] The cylinder 13 includes an exhaust joint 1301, a sealing ring 1302, an annular vibration damping pad 1303, a cylinder bracket 1304, a cylinder head 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, a circlip 1314, a gasket 1315, a ball bearing 1316, a connecting shaft 1317 and an eccentric wheel 1318.

[0036] The outer cylindrical surface 120131 of the hollow shaft 12013 and the fixing hole 13042 of the cylinder bracket 1304 are fixed to the cylinder bracket 1304 by interference fit.

[0037] The eccentric wheel 1318 of the cylinder 13 is provided with a flat hole 13181 and the shaft flat 120233 provided on the motor shaft 12023 is fixedly connected to the motor shaft 12023 by an interference fit. The connecting shaft 1317 is provided with a shaft flat 13172 and the flat hole 13182 provided on the eccentric wheel 1318 is fixedly connected by an interference fit. The ball bearing 1316 is fixed in the inner hole 13135 provided in the piston connecting rod 1313. A gasket 1315 is provided on the left side of the ball bearing 1316. An elastic retaining ring 1314 is installed in the annular groove 13171 provided on the connecting shaft 1317 to axially position the piston connecting rod 1313.

[0038] The cylinder bracket 1304 is provided with a plurality of mounting holes 13041 which are connected to the threaded holes 13106 provided on the cylinder sleeve 1310 via fixing screws 1312 , thereby fixing the cylinder sleeve 1310 on the cylinder bracket 1304 .

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

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

[0041] The sealing seat 1307 is installed in the annular step 13102 set in the cylinder liner 1310, and a compression spring 1306 is set at the annular step 13051 of the cylinder head 1305. The compression spring 1306 squeezes 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 sleeve 1310 to form a seal between the cylinder head 1305 and the cylinder sleeve 1310 .

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

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

[0045] The vibration 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 vibration damping ring 1403, thereby reducing the transmission and diffusion of vibration during the operation of the air pump and reducing the impact on the automobile environment.

[0046] The annular vibration-damping pad 1303 is fixed on the cylinder bracket 1304 via the annular groove 13031 .

[0047] The lower cover component 14 also includes a protrusion 14013, and the annular vibration damping pad 1303 is attached to the protrusion 14013, and then the edge of the upper cover component 11 and the edge of the lower cover component 14 are relatively fixed together. The edge of the lower cover 1401 is also provided with a plurality of positioning bosses 14011 to position the edge of the annular vibration damping pad 1303. The upper cover 1101 is also provided with a plurality of bosses 11011 to axially position the annular vibration damping pad 1303, so that the cylinder bracket 1304 is firmly installed by the edge of the upper cover component 11 and the lower cover component 14 to ensure that the brushless motor 12 and the cylinder 13 are reliably fixed. Moreover, the brushless motor 12 and the cylinder 13 are damped by the annular vibration 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 storage tank 2 is provided with an air inlet joint 25, which is communicated with the exhaust joint 1301 set by the air pump through an air pipe, a drain joint 21 is provided, which is connected and communicated with the water inlet joint 31 set by the electromagnetic drain valve 3 through a water pipe, a fixing hole 22 is provided to install a fixed liquid level sensor 4, a fixing hole 23 is provided to install a fixed pressure sensor 5, and an air outlet joint 24 is provided to connect and communicate with the air inlet joint 61 set by the electromagnetic exhaust valve 6 of multiple branches through an air pipe.

[0049] When the brushless motor 12 is working, the eccentric wheel 1318 is driven to rotate through the motor shaft 12023, and the eccentric wheel 1318 drives the piston connecting rod 1313 to move upward through the connecting shaft 1317, and the pressure gradually increases after the air in the cylinder sleeve 1310 is compressed. When the pressure rises to the set value, the sealing seat 1307 is pushed to squeeze the compression spring 1306 to open the sealing seat 1307, and the pressurized air flows to the exhaust joint 1301 and enters the air storage tank 2 through the air pipe; when the piston connecting rod 1313 moves downward, as the The air pressure in the cylinder sleeve 1310 drops until the compression spring 1306 closes the sealing seat 1307, and the air in the cylinder sleeve 1310 forms a negative pressure, and then the air enters the cylinder sleeve 1310 through the air inlet hole 13131 set in the piston connecting rod 1313, and the reciprocating cycle is repeated to realize the inflation 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 the set standard value, the pressure sensor 5 feeds back a signal to the vehicle control system, and the vehicle control system immediately stops the operation of the air pump 1.

[0050] Since the air contains moisture, as the gas is compressed and stored in the gas tank 2, the moisture will condense and form liquid water. When the liquid level sensor 4 detects that the liquid water in the gas tank 2 reaches the set upper limit water level, the liquid level sensor 4 sends a signal to the vehicle control system, and the vehicle control system immediately opens the electromagnetic drain valve 3 to discharge the liquid water in the gas tank 2 from the drain port 32 of the electromagnetic drain valve 3 until the drain stops.

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

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

[0053] The telescopic air blowing nozzle 8 comprises a nozzle head 801 , a dustproof pad 802 , an end cover 803 , a housing 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 provided on the transmission rod 807 , and the piston ring 806 forms a sliding seal with the inner wall 8041 of the housing 804 .

[0055] The sealing sleeve 809 is installed on the outer cylindrical surface 8072 of the transmission rod 807 to form an elastic seal. Two exhaust ports 8071 are symmetrically arranged along the center of the upper part of the transmission rod 807. The nozzle body 808 is fixed on the transmission rod 807 by means of the bayonet 8082 provided therein cooperating with the clamping platform 8073 provided on the transmission rod 807, and the annular step 8083 provided on the nozzle body 808 cooperates with the annular boss 8091 provided on the sealing sleeve 809 to form a seal. The compression spring 805 is sleeved on the outer circumferential surface of the nozzle body 808, with the upper end limited by the housing 804 and the lower end limited by the transmission rod.

[0056] The end cover 803 is provided with a bayonet 8031, which cooperates with a buckle 8043 provided on the shell 804 for fixation.

[0057] The nozzle head 801 is fixed to the upper end of the nozzle body 808 , and a seal is formed between the inner circular surface 8011 of the nozzle head 801 and the sealing convex ring 8081 provided on the nozzle body 808 .

[0058] A dustproof pad 802 is arranged above the sealing part between the end cover 803 and the nozzle body 808 . The dustproof pad 802 is fixed on the nozzle head 801 . The dustproof pad 802 can prevent dust from entering the interior of the housing 804 and affecting the sliding sealing effect between the piston ring 806 and the inner wall 8041 of the housing 804 .

[0059] When the telescopic air blowing nozzle 8 is working, the high-pressure ion wind entering from the air inlet joint 8042 pushes the transmission rod 807 and the nozzle body 808 to move upward and squeeze the compression spring 805. When the compression spring 805 can no longer be compressed, the nozzle body 808 moves to the uppermost position, and then the air pressure gradually increases with the continued increase of gas in the shell 804. After the pressure reaches the set standard value, the elastic sealing sleeve 809 is opened, and the high-pressure ion wind is discharged from the exhaust port 8071 of the transmission rod 807 to the nozzle head 801, and then blown out from the air port 8012 of the nozzle head 801 to clean the optical sensor or radar. After the cleaning is completed, the air intake is stopped, the air pressure in the shell drops, the sealing sleeve 809 contracts and the air intake is closed, 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 air blowing nozzle 8 is installed on the exterior surface of the car with appearance requirements, which will not affect the beauty of the car due to the bulge, and will not cause harm to pedestrians.

[0060] When the vehicle control system receives a feedback signal that one or more optical sensors or radars are contaminated, it will immediately open the electromagnetic exhaust valve 6 of the corresponding branch, and synchronously start the ion generator 63 in the electromagnetic exhaust valve 6, and the high-pressure ion wind will flow into the fixed air blowing nozzle 7 through the air pipe, and blow out from the air outlet 72 to clean the contaminated optical sensor or radar. If the corresponding branch is provided with a telescopic air blowing nozzle 8, the high-pressure ion wind will push the nozzle head 801 of the telescopic air blowing nozzle 8 to extend to the uppermost position, and then the high-pressure ion wind will blow out from the air outlet 8012 of the telescopic nozzle head 801 to clean the optical sensor or radar, thereby ensuring the cleanliness of the vehicle perception sensor and the accuracy of the collected data information, thereby ensuring the normal driving and safety of the vehicle.

[0061] It should be noted that the directional characters such as inside, outside, left, right, up, and down and words containing the directional characters mentioned in this embodiment and this application document that indicate directions are only used for the convenience of explanation and only refer to specific directions determined during the description, and do not constitute a limitation on the content and protection scope of the present invention.

Claims

1. The ion wind cleaning system for the sensor of the driverless car is characterized by: The invention comprises an air pump, an air storage tank, an electromagnetic drain valve, a liquid level sensor, a pressure sensor, an electromagnetic exhaust valve and a nozzle. The exhaust joint of the air pump is connected to the air inlet joint of the air storage tank, the water inlet joint of the electromagnetic drain valve is connected to the drain joint of the air storage tank, the liquid level sensor and the pressure sensor are installed on the air storage tank, the air outlet joint of the air storage tank is connected to the air inlet joint of the electromagnetic exhaust valve, an ion generator is arranged in the electromagnetic exhaust valve, the ions generated by the ion generator form ion wind together with the compressed gas, and the air outlet joint is connected to the nozzle; when the pressure sensor senses that the air pressure in the air storage tank reaches the set standard value, the pressure sensor The electromagnetic drain valve is arranged at the bottom of the gas tank. When the liquid level sensor detects that the liquid water in the gas tank reaches the set upper water level, the liquid level sensor feeds back a signal to the vehicle control system, and the vehicle control system immediately opens the electromagnetic drain valve to discharge the liquid water in the gas tank from the drain port arranged by the electromagnetic drain valve.

2. The ion wind cleaning system for the driverless car sensor as claimed in claim 1, characterized in that: The air pump adopts a brushless motor.

3. The ion wind cleaning system for the driverless car sensor as claimed in claim 1, characterized in that: The air pump includes an upper cover component, a brushless motor, a cylinder and a lower cover component; the cylinder includes a cylinder bracket, a cylinder sleeve, and an eccentric shaft, the cylinder sleeve is fixed on the cylinder bracket, the brushless motor includes a stator assembly and a rotor assembly, the rotor housing of the rotor assembly is fixed to the motor shaft by an interference fit, the motor shaft is connected to the eccentric shaft of the cylinder, the stator assembly includes a hollow shaft, and the hollow shaft is fixed to the cylinder bracket by an interference fit, the lower cover component includes a protrusion, an annular vibration damping pad is attached to the protrusion, and then the edge of the upper cover component and the edge of the lower cover component are relatively fixed together, a plurality of positioning bosses are also provided on the edge of the lower cover ring to position the edge of the annular vibration damping pad, the upper cover is also provided with a plurality of bosses to axially position the annular vibration damping pad, and the cylinder bracket is fixed by the edge of the upper cover component and the lower cover component.

4. The ion wind cleaning system for the driverless car sensor as claimed in claim 3, characterized in that: A left ball bearing and a right ball bearing are fixed in the inner hole of the hollow shaft of the stator assembly, and a shaft sleeve is arranged between the left ball bearing and the right ball bearing to axially position the left ball bearing and the right ball bearing.

5. The ion wind cleaning system for the driverless car sensor as claimed in claim 3, characterized in that: The upper cover component comprises an upper cover, a bushing and a vibration-damping ring. The vibration-damping ring is provided with an annular groove, which cooperates with the mounting hole provided in the upper cover and is fixed therein. The bushing is installed in the inner hole of the vibration-damping ring.

6. The ion wind cleaning system for the driverless car sensor as claimed in claim 3, characterized in that: The lower cover component comprises a lower cover, a bushing and a vibration damping ring; the vibration damping ring is provided with an annular groove which cooperates with the mounting hole of the lower cover, the annular groove is fixed in the mounting hole, and the bushing is installed in the inner hole of the vibration damping ring.

7. The ion wind cleaning system for the driverless car sensor as claimed in claim 1, characterized in that: The nozzle is a retractable air blowing nozzle, which will automatically rise to a set height before performing high-pressure ion wind cleaning on the sensing sensor, and then automatically retract to its original position after cleaning is completed.

8. The ion wind cleaning system for the driverless car sensor as claimed in claim 7, characterized in that: A dustproof pad is arranged at the lower end of the nozzle head.

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