阅读说明：本技术 一种洗车机及车辆位置异常监控方法 (Car washer and method for monitoring abnormal positions of cars ) 是由 范春林 高志军 陈弘昌 于 2021-09-27 设计创作，主要内容包括：本发明涉及自动洗车机领域,尤其涉及一种洗车机及车辆位置异常监控方法,所述方法应用于洗车机,洗车机包括控制器、电机、传送装置和多组位置传感器,传送装置由电机驱动并用于传送待洗车辆,电机上设置有编码器,编码器用于向控制器发送编码值,位置传感器用于响应待洗车辆的触发而向控制器发送位置信号,控制器分别与编码器、位置传感器电连接,多组位置传感器按照设定的距离关系沿待洗车辆传送的方向布置,所述方法包括：通过控制器与各组位置传感器的配合,判断控制器确定编码值与所述多组位置传感器之间的位置换算关系,能够及时判断车辆清洗过程是否出现异常,及时采取相应措施,避免对洗车机和车辆造成不可挽回的伤害。(The invention relates to the field of automatic car washers, in particular to a car washer and a method for monitoring abnormal positions of cars, wherein the method is applied to the car washer, the car washer comprises a controller, a motor, a transmission device and a plurality of groups of position sensors, the transmission device is driven by the motor and is used for transmitting the cars to be washed, the motor is provided with an encoder, the encoder is used for sending an encoded value to the controller, the position sensors are used for responding to the triggering of the cars to be washed and sending position signals to the controller, the controller is respectively and electrically connected with the encoder and the position sensors, and the plurality of groups of position sensors are arranged along the transmission direction of the cars to be washed according to a set distance relationship, and the method comprises the following steps: through the cooperation of the controller and each group of position sensors, the judgment controller determines the position conversion relation between the code value and the plurality of groups of position sensors, can judge whether the vehicle cleaning process is abnormal in time and take corresponding measures in time, thereby avoiding irreparable damage to the car washer and the vehicle.)

1. A vehicle position abnormity monitoring method is applied to a car washer and is characterized by comprising a controller, a motor, a conveying device and a plurality of groups of position sensors, wherein the conveying device is driven by the motor and is used for conveying a vehicle to be washed, an encoder is arranged on the motor and comprises an encoding disc and a spiral type proximity switch, the encoder is used for sending an encoding value to the controller, the position sensors are used for responding to the triggering of the vehicle to be washed and sending position signals to the controller, the controller is respectively and electrically connected with the encoder and the position sensors, and the plurality of groups of position sensors are arranged along the conveying direction of the vehicle to be washed according to a set distance relationship, and the method comprises the following steps:

when a vehicle to be washed triggers a first group of position sensors, a controller acquires a first coding value currently sent by an encoder;

according to the first encoding value and the distance relationship among the plurality of groups of position sensors, the controller determines the position conversion relationship between the encoding value and the plurality of groups of position sensors;

when the vehicle to be washed triggers the second group of position sensors, the controller acquires a second encoding value currently sent by the encoder; the second group of position sensors are any group of position sensors except the first group of position sensors in the plurality of groups of position sensors;

the controller determines whether the second coded value and the second group of position sensors accord with the position conversion relation or not, and if not, the controller determines that the position of the vehicle to be washed is abnormal.

2. The vehicle position abnormality monitoring method according to claim 1, wherein when the controller determines that the second code value and the second group of position sensors do not comply with the position conversion relationship, the method further includes:

when the vehicle to be washed triggers the second group of position sensors, if the second code value currently sent by the encoder acquired by the controller is smaller than the set value, the reason that the position of the vehicle to be washed is abnormal is determined as follows: the vehicle is coasting or the vehicle is in motion;

when the vehicle to be washed triggers the second group of position sensors, if the second code value currently sent by the encoder acquired by the controller is larger than the set value, the reason that the position of the vehicle to be washed is abnormal is determined as follows: the vehicle is braked.

3. The vehicle position abnormality monitoring method according to claim 1, characterized in that the second group of position sensors includes a light correlation sensor provided at an exit end of the conveyor, the method further comprising:

when the vehicle to be washed triggers the light correlation sensor, the controller judges whether the time for which the light correlation sensor is triggered is longer than a set time threshold value, if so, an alarm instruction is sent to an alarm device, and the alarm instruction is used for indicating the alarm device to send an alarm signal.

4. The vehicle position abnormality monitoring method according to claim 1, characterized in that the conveying device includes a belt conveyor or a link conveyor.

5. The vehicle position abnormality monitoring method according to claim 1, characterized in that the position sensor includes a light correlation sensor or a proximity switch.

6. The car washer is characterized by comprising a controller, a motor, a conveying device and a plurality of groups of position sensors, wherein the conveying device is driven by the motor and used for conveying a car to be washed, an encoder is arranged on the motor and comprises an encoding disc and a spiral proximity switch, the encoder is used for sending an encoding value to the controller, the position sensors are used for responding to triggering of the car to be washed and sending position signals to the controller, the controller is respectively electrically connected with the encoder and the position sensors, the plurality of groups of position sensors are arranged along the conveying direction of the car to be washed according to a set distance relationship, and the controller is used for:

when a vehicle to be washed triggers a first group of position sensors, acquiring a first coding value currently sent by an encoder;

determining a position conversion relation between the code values and the plurality of groups of position sensors according to the first code values and the distance relation between the plurality of groups of position sensors;

when a vehicle to be washed triggers a second group of position sensors, a second coding value currently sent by the coder is obtained; the second group of position sensors are any group of position sensors except the first group of position sensors in the plurality of groups of position sensors;

and determining whether the second coded value and the second group of position sensors accord with the position conversion relation, and if not, determining that the position of the vehicle to be washed is abnormal.

7. The car washer according to claim 6, wherein when the controller determines that the second code value and the second set of position sensors do not comply with the position scaling relationship, the controller is further configured to:

when the vehicle to be washed triggers the second group of position sensors, the second code value currently sent by the obtained encoder is smaller than the set value, and the reason that the position of the vehicle to be washed is abnormal is determined as follows: the vehicle is coasting or the vehicle is in motion;

when the vehicle to be washed triggers the second group of position sensors, the second code value currently sent by the obtained encoder is larger than the set value, and the reason that the position of the vehicle to be washed is abnormal is determined as follows: the vehicle is braked.

8. The car washer of claim 6, wherein the second set of position sensors comprises a light correlation sensor disposed at an exit end of the conveyor, the controller further configured to:

when a vehicle to be washed triggers the light correlation sensor, whether the time for which the light correlation sensor is triggered is longer than a set time threshold value or not is judged, if yes, an alarm instruction is sent to an alarm device, and the alarm instruction is used for indicating the alarm device to send an alarm signal.

9. A car washer according to claim 6, characterized in that the conveying means comprise a belt conveyor or a scraper chain conveyor.

10. A car washer according to claim 6, characterized in that the position sensor comprises a light correlation sensor or a proximity switch.

Technical Field

The invention relates to the technical field of automatic car washers, in particular to a car washer and a method for monitoring abnormal positions of cars.

Background

Tunnel car washers usually transport the car to each car washing area via a conveyor platform and then transport the car out of the car washer to achieve automatic car washing.

In the related art, the car washing process of the car washer is as follows: after the vehicle to be washed is in neutral, the vehicle is dragged by the chain plate to be conveyed forwards, the chain plate is driven by a motor, an encoder is arranged on the motor, the distance for dragging the vehicle by the chain plate to be conveyed forwards can be determined through an encoding value provided by the encoder, the distance can be used as a coordinate of the vehicle in a car washer, and the cleaning mechanism at the corresponding coordinate position is controlled to act according to the coordinate of the vehicle to complete the vehicle cleaning work.

The related art adopts an encoder to determine the coordinates of the vehicle in the car washer, and when the car washer has an incorrect operation on a chain plate, for example, a car owner makes a handbrake, steps on a brake, engages N gears, steps on an accelerator during the car washing process, operates the vehicle, and the like, the incorrect operation may cause inaccurate coordinate information of the vehicle in the car washer.

Disclosure of Invention

The invention aims to provide a car washer and a method for monitoring abnormal positions of a car, which can judge whether the coordinate information of the car determined by an encoder is accurate or not and find whether the position of the car is abnormal or not.

In order to achieve the above object, the present invention provides the following technical solutions:

in a first aspect, the present invention provides a vehicle position abnormality monitoring method, which is applied to a car washer, the car washer includes a controller, a motor, a transmission device and a plurality of sets of position sensors, the transmission device is driven by the motor and is used for transmitting a vehicle to be washed, the motor is provided with an encoder, the encoder includes an encoding disc and a spiral proximity switch, the encoder is used for sending an encoding value to the controller, the position sensors are used for sending position signals to the controller in response to the triggering of the vehicle to be washed, the controller is respectively electrically connected with the encoder and the position sensors, the plurality of sets of position sensors are arranged along the transmission direction of the vehicle to be washed according to a set distance relationship, and the method includes:

when a vehicle to be washed triggers a first group of position sensors, a controller acquires a first coding value currently sent by an encoder;

according to the first encoding value and the distance relationship among the plurality of groups of position sensors, the controller determines the position conversion relationship between the encoding value and the plurality of groups of position sensors;

when the vehicle to be washed triggers the second group of position sensors, the controller acquires a second encoding value currently sent by the encoder; the second group of position sensors are any group of position sensors except the first group of position sensors in the plurality of groups of position sensors;

the controller determines whether the second coded value and the second group of position sensors accord with the position conversion relation or not, and if not, the controller determines that the position of the vehicle to be washed is abnormal.

Compared with the prior art, the invention at least has the following beneficial effects: when a car owner pulls a hand brake, steps on a brake, engages N gears, steps on an accelerator in the car washing process, operates a car and the like on a conveying device of the car washer, the car to be washed and the conveying device are subjected to relative displacement through the operations, and the fact that coordinate information determined by an encoder of the car is inaccurate may be caused. According to the invention, the position conversion relation between the code value and the plurality of groups of position sensors is determined according to the first code value and the distance relation between the plurality of groups of position sensors, and when the vehicle to be washed passes through the second group of position sensors, the coordinate information determined by the vehicle through the encoder is inaccurate due to the misoperation, the abnormal position of the vehicle can be found in time, so that the operator is reminded to intervene in the treatment in time, and the vehicle washing machine and the vehicle to be washed are prevented from being damaged.

Further, when the controller determines that the second code value does not comply with the position scaling relationship with the second set of position sensors, the method further comprises:

when the vehicle to be washed triggers the second group of position sensors, the controller acquires that the second code value currently sent by the encoder is smaller than the set value, and then the reason that the position of the vehicle to be washed is abnormal is determined as follows: the vehicle is coasting or the vehicle is in motion.

Further, when the controller determines that the second code value does not comply with the position scaling relationship with the second set of position sensors, the method further comprises:

when the vehicle to be washed triggers the second group of position sensors, the controller acquires that the second code value currently sent by the encoder is larger than the set value, and then the reason that the position of the vehicle to be washed is abnormal is determined as follows: the vehicle is braked.

According to the structural characteristics that the conveying device conveys the vehicle to be washed, when the controller determines that the second code value and the second group of position sensors do not conform to the position conversion relation, the reason for the position abnormality of the vehicle to be washed can be given, matched operation reminding can be sent to a vehicle owner on the vehicle to be washed, and the vehicle owner can correct wrong operation behaviors timely.

Further, the second set of position sensors includes a light correlation sensor disposed at an exit end of the conveyor, the method further comprising:

when the vehicle to be washed triggers the light correlation sensor, the controller judges whether the time for which the light correlation sensor is triggered is longer than a set time threshold value, if so, an alarm instruction is sent to an alarm device, and the alarm instruction is used for indicating the alarm device to send an alarm signal.

Through set up the light correlation sensor at conveyer exit end, can in time monitor from the exit end whether the vehicle that is leaving conveyer pauses unusually, the condition that the vehicle can't be sent out takes place, can in time remind operating personnel to respond to and handle, avoids taking place the accident.

Further, the conveying device comprises a belt conveyor or a chain scraper conveyor.

Further, the position sensor includes a light correlation sensor or a proximity switch.

In a second aspect, the present invention provides a car washer, including a controller, a motor, a transmission device, and a plurality of sets of position sensors, where the transmission device is driven by the motor and is used to transmit a car to be washed, the motor is provided with an encoder, the encoder includes an encoding disc and a spiral proximity switch, the encoder is used to send an encoded value to the controller, the position sensors are used to send position signals to the controller in response to the triggering of the car to be washed, the controller is electrically connected to the encoder and the position sensors, respectively, the plurality of sets of position sensors are arranged along the transmission direction of the car to be washed according to a set distance relationship, and the controller is used to:

when a vehicle to be washed triggers a first group of position sensors, a controller acquires a first coding value currently sent by an encoder;

according to the first encoding value and the distance relationship among the plurality of groups of position sensors, the controller determines the position conversion relationship between the encoding value and the plurality of groups of position sensors;

when the vehicle to be washed triggers the second group of position sensors, the controller acquires a second encoding value currently sent by the encoder; the second group of position sensors are any group of position sensors except the first group of position sensors in the plurality of groups of position sensors;

the controller determines whether the second coded value and the second group of position sensors accord with the position conversion relation or not, and if not, the controller determines that the position of the vehicle to be washed is abnormal.

Compared with the prior art, the invention at least has the following beneficial effects: when a car owner pulls a hand brake, steps on a brake, engages N gears, steps on an accelerator in the car washing process, operates a car and the like on a conveying device of the car washer, the car to be washed and the conveying device are subjected to relative displacement through the operations, and the fact that coordinate information determined by an encoder of the car is inaccurate may be caused. According to the invention, the position conversion relation between the code value and the plurality of groups of position sensors is determined according to the first code value and the distance relation between the plurality of groups of position sensors, and when the vehicle to be washed passes through the second group of position sensors, the coordinate information determined by the vehicle through the encoder is inaccurate due to the misoperation, the abnormal position of the vehicle can be found in time, so that the operator is reminded to intervene in the treatment in time, and the vehicle washing machine and the vehicle to be washed are prevented from being damaged.

Further, when the controller determines that the second encoded value does not comply with the position scaling relationship with the second set of position sensors, the controller is further configured to:

when the vehicle to be washed triggers the second group of position sensors, the controller acquires that the second code value currently sent by the encoder is smaller than the set value, and then the reason that the position of the vehicle to be washed is abnormal is determined as follows: the vehicle is coasting or the vehicle is in motion.

Further, when the controller determines that the second code value does not comply with the position scaling relationship with the second set of position sensors, the method further comprises:

when the vehicle to be washed triggers the second group of position sensors, the controller acquires that the second code value currently sent by the encoder is larger than the set value, and then the reason that the position of the vehicle to be washed is abnormal is determined as follows: the vehicle is braked.

According to the structural characteristics that the conveying device conveys the vehicle to be washed, when the controller determines that the second code value and the second group of position sensors do not conform to the position conversion relation, the reason for the position abnormality of the vehicle to be washed can be given, matched operation reminding can be sent to a vehicle owner on the vehicle to be washed, and the vehicle owner can correct wrong operation behaviors timely.

Further, the second set of position sensors includes a light correlation sensor disposed at an exit end of the conveyor, and the controller is further configured to:

when the vehicle to be washed triggers the light correlation sensor, the controller judges whether the time for which the light correlation sensor is triggered is longer than a set time threshold value, if so, an alarm instruction is sent to an alarm device, and the alarm instruction is used for indicating the alarm device to send an alarm signal.

Through set up the light correlation sensor at conveyer exit end, can in time monitor from the exit end whether the vehicle that is leaving conveyer pauses unusually, the condition that the vehicle can't be sent out takes place, can in time remind operating personnel to respond to and handle, avoids taking place the accident.

Further, the conveying device comprises a belt conveyor or a chain scraper conveyor.

Further, the position sensor includes a light correlation sensor or a proximity switch.

Drawings

The invention is further described below with reference to the accompanying drawings and examples;

fig. 1 is a schematic view of a car washer according to an embodiment.

Fig. 2 is a partially enlarged view of a portion a in fig. 1.

FIG. 3 is a flowchart of a method for monitoring vehicle position anomalies, according to one embodiment.

FIG. 4 is a flowchart of a method for monitoring vehicle position anomalies, according to one embodiment.

Wherein, 3, a motor; 4. an encoder; 101. light rays; 100. group 1 light correlation sensor; 110. a 2 nd group of light correlation sensors; 170. group 3 light correlation sensor; 120. group 4 light correlation sensor; 130. a 5 th group of light correlation sensors; 160. a 6 th group of light correlation sensors; 150. a 7 th group of light correlation sensors; 140. a 8 th group of light correlation sensors; 180. and a conveying device.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In one embodiment, a vehicle position abnormality monitoring method is provided, and the method is applied to a car washer.

As shown in fig. 1 and 2, in one embodiment, the car washer comprises a controller, a motor 3, a transmission device 180 and a plurality of sets of position sensors, wherein the transmission device 180 is driven by the motor 3 and is used for transmitting a vehicle to be washed, an encoder 4 is arranged on the motor 3, the encoder 4 comprises an encoding disc 41 and a spiral type proximity switch 42, the encoder 4 is used for sending an encoding value to the controller, the position sensors are used for sending position signals to the controller in response to the triggering of the vehicle to be washed, the controller is respectively electrically connected with the encoder 4 and the position sensors, and the plurality of sets of position sensors are arranged along the transmission direction of the vehicle to be washed according to a set distance relationship.

The conveying device 180 is used for driving the vehicle to be conveyed from right to left, and vehicle cleaning is completed. In one embodiment, the conveyor 180 comprises a belt conveyor or a scraper chain conveyor. In one embodiment, the conveyor 180 is a chain conveyor, and referring to fig. 1, the motor 3 drives the chain to drive the vehicle to move forward from right to left, thereby completing the vehicle cleaning.

Wherein the position sensor may be an optical correlation sensor, as shown in fig. 1, in one embodiment, the position sensor includes a plurality of sets (e.g., 8 sets) of position sensors, respectively, a 1 st set of optical correlation sensor 100, a 2 nd set of correlation sensor 110, a 3 rd set of position sensor 170, a 4 th set of position sensor 120, a 5 th set of position sensor 130, a 6 th set of position sensor 160, a 7 th set of position sensor 150, and an 8 th set of position sensor 140, wherein the 4 th set, the 6 th set, and the 7 th set are short correlation sensors.

Referring to fig. 1, the position sensors may be a group 1 of light correlation sensors and a second group of light correlation sensors shown in fig. 1, the second group of position sensors is any group of position sensors (i.e., any group of 2-8 group position sensors) except the group 1 of position sensors among the plurality of groups of position sensors, and the position sensors are disposed on both sides of the link plate and used for detecting whether the vehicle reaches a specified position.

As shown in fig. 3, in one embodiment, the method comprises:

step S102: when the vehicle to be washed triggers the first group of position sensors, the controller acquires a first code value currently sent by the encoder 4.

Referring to fig. 1, the first group of position sensors is a 1 st group of light correlation sensors, is located at the rightmost end of the car washer, and is a position sensor which is triggered by a car to be washed first.

Step S104: and according to the first encoding value and the distance relationship among the plurality of groups of position sensors, the controller determines the position conversion relationship between the encoding value and the plurality of groups of position sensors.

Wherein, the distance relation between the multiple groups of position sensors comprises: distance between two position sensors. And knowing the distance between the first group of position sensors and the second group of position sensors, and calculating a theoretical second encoding value corresponding to the second group of position sensors according to the first encoding value, wherein the corresponding relation between the encoding value and the distance. For example, assuming that the distance between the first set of position sensors and the second set of position sensors is 1 meter, the correspondence between the code values and the distances is: for every 1000 increments of the code value, the corresponding distance increments by 1 meter, and assuming that the first code value is 10, the theoretical second code value corresponding to the second group of position sensors is 1000+10 — 1010.

Step S106: when the vehicle to be washed triggers the second group of position sensors, the controller acquires a second encoding value currently sent by the encoder 4; the second group of position sensors are any group of position sensors except the first group of position sensors in the plurality of groups of position sensors;

wherein the currently transmitted second encoded value is the current actual second encoded value of the encoder 4.

Step S108: the controller determines whether the second coded value and the second group of position sensors accord with the position conversion relation or not, and if not, the controller determines that the position of the vehicle to be washed is abnormal.

And comparing the obtained actual second code value with a theoretical second code value obtained according to the position conversion relation, and if the actual second code value is different from the theoretical second code value, judging that the position of the vehicle to be washed is abnormal.

The position conversion relation between the code value 4 and the plurality of groups of position sensors is determined through the distance relation between the first code value and the plurality of groups of position sensors, when the vehicle to be washed causes the coordinate information determined by the encoder 4 to be inaccurate due to misoperation, the vehicle to be washed can be found in time when passing through the second group of position sensors, so that the abnormity of the position of the vehicle can be found in time, operators can be reminded of intervening treatment in time, and the vehicle washing machine and the vehicle to be washed are prevented from being damaged.

In one embodiment, when the controller determines that the second code value and the second set of position sensors do not comply with the position scaling relationship, as shown in fig. 4, the method further comprises:

step S202: when the vehicle to be washed triggers the second group of position sensors, the controller acquires that the second code value currently sent by the encoder 4 is smaller than the set value, and then the reason that the position of the vehicle to be washed is abnormal is determined as follows: the vehicle is coasting or the vehicle is in motion.

The set value is the corresponding relation between the distance between every two position sensors and the theoretical coding value.

Step S204: when the vehicle to be washed triggers the second group of position sensors, the controller acquires that the second code value currently sent by the encoder 4 is larger than the set value, and then the reason that the position of the vehicle to be washed is abnormal is determined as follows: the vehicle is braked.

According to the structural characteristics that the conveying device 180 conveys the vehicle to be washed, when the controller determines that the second code value and the second group of position sensors do not conform to the position conversion relation, the reason for the position abnormality of the vehicle to be washed can be given, matched operation reminding can be sent to a vehicle owner on the vehicle to be washed, and the vehicle owner can correct wrong operation behaviors timely.

In one embodiment, the second set of position sensors includes a light correlation sensor disposed at an exit end of the conveyor 180, the method further comprising:

when the vehicle to be washed triggers the light correlation sensor, the controller judges whether the time for which the light correlation sensor is triggered is longer than a set time threshold value, if so, an alarm instruction is sent to an alarm device, and the alarm instruction is used for indicating the alarm device to send an alarm signal.

The optical correlation sensor detects whether the vehicle leaving the conveying device 180 is abnormally stopped, and when the time for which the optical correlation sensor is triggered is greater than a set time threshold (for example, 1 minute), it is determined that the vehicle is abnormally stopped, and at this time, an alarm instruction is sent to the alarm device.

Wherein the alarm device may be a horn, the conveyor 180 comprises a belt conveyor or a slat conveyor, and the position sensor comprises a light correlation sensor or a proximity switch.

Through set up the light correlation sensor at conveyer 180 exit end, can in time monitor from the exit end whether the vehicle that is leaving conveyer 180 pauses unusually, the condition that the vehicle can't be sent out takes place, can in time remind operating personnel to respond to and handle, avoids taking place the accident.

In one embodiment, there is provided a car washer, including a controller, a motor 3, a transmission device 180 and a plurality of sets of position sensors, wherein the transmission device 180 is driven by the motor 3 and is used for transmitting a car to be washed, an encoder 4 is arranged on the motor 3, the encoder 4 includes an encoding disc 41 and a spiral proximity switch 42, the encoder 4 is used for sending an encoding value to the controller, the position sensors are used for sending position signals to the controller in response to the triggering of the car to be washed, the controller is electrically connected with the encoder 4 and the position sensors respectively, the plurality of sets of position sensors are arranged along the transmission direction of the car to be washed according to a set distance relationship, and the controller is used for:

when a vehicle to be washed triggers a first group of position sensors, a first coding value currently sent by a coder 4 is obtained;

determining a position conversion relation between the code values and the plurality of groups of position sensors according to the first code values and the distance relation between the plurality of groups of position sensors;

when the vehicle to be washed triggers the second group of position sensors, a second coding value currently sent by the coder 4 is obtained; the second group of position sensors are any group of position sensors except the first group of position sensors in the plurality of groups of position sensors;

and determining whether the second coded value and the second group of position sensors accord with the position conversion relation, and if not, determining that the position of the vehicle to be washed is abnormal.

When the controller determines that the second encoded value does not comply with the position scaling relationship with the second set of position sensors, the controller is further configured to:

when the vehicle to be washed triggers the second group of position sensors, the second code value currently sent by the encoder 4 is acquired to be smaller than the set value, and the reason that the position of the vehicle to be washed is abnormal is determined as follows: the vehicle is coasting or the vehicle is in motion;

when the vehicle to be washed triggers the second group of position sensors, the second code value currently sent by the encoder 4 is acquired to be larger than the set value, and the reason that the position of the vehicle to be washed is abnormal is determined as follows: the vehicle is braked.

The second set of position sensors includes a light correlation sensor disposed at the exit end of the conveyor 180, and the controller is further configured to:

when a vehicle to be washed triggers the light correlation sensor, whether the duration time for which the light correlation sensor is triggered is greater than a set time threshold value or not is judged, if yes, an alarm instruction is sent to an alarm device, and the alarm instruction is used for indicating the alarm device to send an alarm signal.

The conveyor 180 comprises a belt conveyor or a drag conveyor.

The position sensor includes a light correlation sensor or a proximity switch.

The position conversion relation between the code values and the multiple groups of position sensors is determined through the distance relation between the first code values and the multiple groups of position sensors, when the vehicle to be washed enables the coordinate information determined by the encoder 4 to be inaccurate due to misoperation, the vehicle to be washed can be found in time when passing through the second group of position sensors, so that the abnormity of the position of the vehicle can be found in time, operators are reminded of intervening in time, and the vehicle washer and the vehicle to be washed are prevented from being damaged.

The device embodiment and the method embodiment of the present invention are based on the same inventive concept and are not described herein again.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as the combinations of the technical features are not contradictory.