Parking accuracy measurement system, method and electronic device

Abstract

The present disclosure relates to a parking precision measurement system, method and electronic device, the system comprising: a controller arranged on a vehicle and a distance sensor arranged on a preset position, a ranging baffle arranged in a preset parking area, the controller being connected with the distance sensor, when the vehicle enters the preset parking area, an included angle between the ranging baffle and a plane where the distance sensor is located is a preset angle, and a measurement signal sent by the distance sensor can reach the ranging baffle. The controller is configured to send a measurement instruction to the distance sensor when a parking signal is received, the distance sensor is configured to send a first measurement signal to the ranging baffle according to the measurement instruction, and receive a second measurement signal reflected back by the ranging baffle to determine a first distance between the distance sensor and the ranging baffle, and the controller is further configured to receive the first distance sent by the distance sensor, and determine parking precision of the vehicle entering the preset parking area according to the first distance, a preset reference distance and the preset angle.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of electronic measurement, in particular to a parking precision measurement system, method and electronic device. BACKGROUND

[0002] With the continuous development of rail transportation, trains, subways, light rails, trams and other transportation methods have become a common choice for people's daily travel. When the vehicle arrives at the station and stops, the parking precision (i.e. the distance between the parking position and the specified position) is an important indicator of the performance of the vehicle control, which will directly affect the user's riding experience. In the prior art, to monitor the parking precision of the vehicle, the parking position of the vehicle in different stations and different time periods needs to be collected multiple times, and the distance between the parking position and the specified position is measured manually by a scale, which consumes a lot of manpower and has low efficiency and accuracy of testing. SUMMARY

[0003] The purpose of the present disclosure is to provide a parking precision measurement system, method and electronic device to solve at least one problem of low measurement efficiency and accuracy of parking precision in the prior art.

[0004] To achieve the above purpose, according to a first aspect of an embodiment of the present disclosure, a parking precision measurement system is provided, the system comprising: a controller arranged on the vehicle, a distance sensor arranged on a preset part of the vehicle, and a ranging baffle arranged in a preset parking area.

[0005] The controller is connected with the distance sensor, when the vehicle enters the preset parking area, the included angle between the ranging baffle and the plane where the distance sensor is located is a preset angle, and the measurement signal sent by the distance sensor can reach the ranging baffle;

[0006] The controller is configured to send a measurement instruction to the distance sensor when a parking signal is received, the parking signal being used to indicate that the vehicle has entered the preset parking area and stopped;

[0007] The distance sensor is configured to send a first measurement signal to the ranging baffle according to the measurement instruction, and receive a second measurement signal reflected back by the ranging baffle, to determine a first distance between the distance sensor and the ranging baffle, and the distance sensor is further configured to send the first distance to the controller;

[0008] The controller is further configured to receive the first distance sent by the distance sensor, and determine a parking accuracy of the vehicle entering the preset parking area according to the first distance, a preset reference distance, and the preset angle, the reference distance being a distance between the distance sensor and the ranging baffle when the vehicle is parked at a reference position in the preset parking area.

[0009] Optionally, the controller is specifically configured to:

[0010] determine a distance difference between the parking position and the reference position according to a difference between the first distance and the reference distance, and the preset angle;

[0011] take the distance difference as the parking accuracy.

[0012] Optionally, the preset parking area has a plurality of preset parking areas, and at least one ranging baffle is arranged in each of the preset parking areas, and the controller is further configured to:

[0013] record the parking accuracy of each of the preset parking areas when the vehicle enters the plurality of preset parking areas;

[0014] determine a characteristic index of the vehicle parking in at least one of the preset parking areas according to the parking accuracy of each of the preset parking areas.

[0015] Optionally, the characteristic index is a process capability index CPK, and the controller is configured to:

[0016] determine a process accuracy and a process precision of the vehicle parking in at least one of the preset parking areas according to the parking accuracy of each of the preset parking areas, the reference position, and a length of the ranging baffle;

[0017] determine the CPK according to the process accuracy and the process precision.

[0018] Optionally, the distance sensor is at least one of an optical distance sensor, an infrared distance sensor, and an ultrasonic distance sensor.

[0019] Optionally, the preset part is a bottom of a door frame of the vehicle.

[0020] The ranging baffle is arranged on a ground surface in the preset parking area.

[0021] According to a second aspect of the embodiments of the present disclosure, a parking accuracy measurement method is provided, and is applied to a parking accuracy measurement system, the system comprising: a distance sensor arranged on a preset part of a vehicle, and a ranging baffle arranged in a preset parking area.

[0022] When the vehicle enters the preset parking area, the included angle between the ranging baffle and the plane where the distance sensor is located is a preset angle, and the measurement signal sent by the distance sensor can reach the ranging baffle;

[0023] The method comprises:

[0024] When a parking signal is received, the distance sensor is sent a measurement instruction, the parking signal is used to indicate that the vehicle has entered the preset parking area and parked, and the measurement instruction is used to instruct the distance sensor to send a first measurement signal to the ranging baffle and receive a second measurement signal reflected back by the ranging baffle to determine a first distance between the distance sensor and the ranging baffle;

[0025] The first distance sent by the distance sensor is received;

[0026] The parking accuracy of the vehicle entering the preset parking area is determined according to the first distance, a preset reference distance and the preset angle, the reference distance being a distance between the distance sensor and the ranging baffle when the vehicle is parked at a reference position in the preset parking area.

[0027] Optionally, the determination of the parking accuracy of the vehicle entering the preset parking area according to the first distance and the preset reference distance comprises:

[0028] According to a difference between the first distance and the reference distance and the preset angle, a distance difference between the parking position and the reference position is determined.

[0029] The distance difference is taken as the parking accuracy.

[0030] Optionally, the preset parking area has a plurality of preset parking areas, and at least one ranging baffle is arranged in each of the preset parking areas.

[0031] The method further comprises:

[0032] The parking accuracy of the vehicle entering each of the preset parking areas is recorded.

[0033] According to the parking accuracy of each of the preset parking areas, a characteristic index of the vehicle parked in at least one of the preset parking areas is determined.

[0034] Optionally, the characteristic index is a process capability index CPK, and the determination of the characteristic index of the vehicle parked in at least one of the preset parking areas according to the parking accuracy of each of the preset parking areas comprises:

[0035] determine a process accuracy and a process precision of parking of the vehicle in the at least one preset parking area according to the parking accuracy of each of the preset parking areas, the reference distance, and a length of the distance measuring baffle;

[0036] determine the CPK according to the process accuracy and the process precision.

[0037] According to a third aspect of the embodiments of the present disclosure, an electronic device is provided, applied to a parking accuracy measurement system, the system comprising: a distance sensor arranged on a preset part of the vehicle, and a distance measuring baffle arranged in a preset parking area.

[0038] When the vehicle enters the preset parking area, an included angle between the distance measuring baffle and a plane where the distance sensor is located is a preset angle, and a measurement signal sent by the distance sensor can reach the distance measuring baffle.

[0039] The electronic device comprises:

[0040] a memory having a computer program stored thereon;

[0041] a processor configured to execute the computer program in the memory to implement the steps of the method of the second aspect of the embodiments of the present disclosure.

[0042] According to the above technical solution, the parking accuracy measurement system provided by the present disclosure comprises a controller arranged on the vehicle, a distance sensor arranged on a preset part of the vehicle, and a distance measuring baffle arranged in a preset parking area, wherein the controller is connected to the distance sensor, when the vehicle enters the preset parking area, an included angle between the distance measuring baffle and a plane where the distance sensor is located is a preset angle, and a measurement signal sent by the distance sensor can reach the distance measuring baffle. When the controller receives a parking signal indicating that the vehicle has entered the preset parking area and parked, the controller sends a measurement instruction to the distance sensor, the distance sensor sends a first measurement signal to the distance measuring baffle according to the measurement instruction, and receives a second measurement signal reflected back by the distance measuring baffle, so as to determine a first distance between the distance sensor and the distance measuring baffle. The controller receives the first distance sent by the distance sensor, and determines a parking accuracy of the vehicle entering the preset parking area according to the first distance, a preset reference distance, and the preset angle. The present disclosure converts the parking accuracy measurement in the horizontal direction into the measurement in the vertical direction by using the distance sensor arranged on the vehicle and the distance measuring baffle arranged at a corresponding position in the parking area, so as to realize the automatic measurement of the parking accuracy, without the need for manual participation, and improve the measurement efficiency and the measurement accuracy of the parking accuracy.

[0043] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0044] The accompanying drawings are included to provide a further understanding of the disclosure and constitute a part of the specification, illustrate the present disclosure and, together with the specific embodiments described below, serve to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:

[0045] Figure 1 is a structural diagram of a parking precision measurement system according to an exemplary embodiment;

[0046] Figure 2 is a structural diagram of a parking precision measurement system according to an exemplary embodiment; Figure 1 is a schematic diagram of the positional relationship between the distance sensor and the ranging baffle in the measurement system shown in FIG. 8;

[0047] Figure 3 is a flowchart of a parking precision measurement method according to an exemplary embodiment;

[0048] Figure 4 is a flowchart of another parking precision measurement method according to an exemplary embodiment;

[0049] Figure 5 is a flowchart of another parking precision measurement method according to an exemplary embodiment;

[0050] Figure 6 is a flowchart of another parking precision measurement method according to an exemplary embodiment;

[0051] Figure 7 is a block diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0052] The exemplary embodiments will be described in detail below with reference to the accompanying drawings. In the following description, the same numbers refer to the same elements throughout the drawings, unless otherwise represented. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the present disclosure, as detailed in the appended claims.

[0053] Before introducing the parking precision measurement system, method and electronic device provided by the present disclosure, first introduce the application scenarios involved in each embodiment of the present disclosure. The application scenario can be any vehicle, which can be a vehicle running according to a preset track, such as a train, a subway, a light rail, a tram, or a car and other types of motor vehicles. The preset parking area can be a designated area such as a station or a platform where the vehicle needs to stop. In this embodiment, the vehicle is taken as an example of a train.

[0054] Figure 1is a structural diagram of a parking precision measurement system according to an exemplary embodiment, as shown in Figure 1 The system 100 includes a controller 101 arranged on a vehicle, a distance sensor 102 arranged at a preset position of the vehicle, and a ranging baffle 103 arranged in a preset parking area.

[0055] The controller 101 is connected to the distance sensor 102. When the vehicle enters the preset parking area, the ranging baffle 103 is arranged at a preset angle with respect to the plane on which the distance sensor 102 is arranged, and the measurement signal sent by the distance sensor 102 can reach the ranging baffle 103.

[0056] For example, the controller 101 is arranged on the vehicle, and the distance sensor 102 is arranged at a preset position of the vehicle. The controller 101 may, for example, be a standalone MCU (Microcontroller Unit), or an ECU (Electronic Control Unit) or BCM (Body Control Module) or host computer configured in the vehicle, or any other control module capable of data interaction with the distance sensor 102. The controller 101 is connected to the distance sensor 102. The connection may, for example, be through physical wiring, such as a CAN (Controller Area Network) bus or a LIN (Local Interconnect Network) bus, or wireless connection according to a preset wireless communication protocol, such as Bluetooth, Wi-Fi, Internet, WLAN (Wireless Local Area Networks), Telematics, etc., so that the controller 101 and the distance sensor 102 can interact with each other. The distance sensor 102 may, for example, be arranged above or below the vehicle door frame (i.e., the position of the vehicle door when it is closed), or at a fixed position of the vehicle window. The system 100 further includes the ranging baffle 103 arranged in the preset parking area and facing the vehicle. When the vehicle enters the preset parking area, the ranging baffle 103 is arranged at a position corresponding to the distance sensor 102, i.e., when the vehicle is parked in the preset parking area, the measurement signal sent by the distance sensor 102 can reach the ranging baffle 103. Further, the ranging baffle 103 is arranged at a preset angle with respect to the plane on which the distance sensor 102 is arranged, as shown in Figure 1The preset angle is angle a, and the preset angle can also be a complementary angle of angle a, and the disclosure does not limit this. The preset angle is angle a in the embodiment. The ranging baffle 103 can be fixed at a position with the same height as the distance sensor 102 in the preset parking area according to the position of the distance sensor 102 on the vehicle. For example, if the distance sensor 102 is arranged above the door frame of the vehicle, the ranging baffle can be arranged at the same height as the distance sensor 102. If the distance sensor 102 is arranged below the door frame of the vehicle, the ranging baffle can be arranged on the ground.

[0057] Specifically, the process of measuring the parking accuracy by the system 100 can include the following steps.

[0058] The controller 101 is configured to send a measurement instruction to the distance sensor 102 when receiving a parking signal, and the parking signal is used to indicate that the vehicle has entered the preset parking area and parked.

[0059] The distance sensor 102 is configured to send a first measurement signal to the ranging baffle 103 according to the measurement instruction, and receive a second measurement signal reflected by the ranging baffle 103 to determine a first distance between the distance sensor 102 and the ranging baffle 103. After determining the first distance, the distance sensor 102 is further configured to send the first distance to the controller 101.

[0060] The controller 101 is further configured to receive the first distance sent by the distance sensor 102, and determine the parking accuracy of the vehicle entering the preset parking area according to the first distance, a preset reference distance, and a preset angle. The reference distance is the distance between the distance sensor 102 and the ranging baffle 103 when the vehicle is parked at a reference position in the preset parking area.

[0061] For example, the controller 101 can be connected with a TCMS (Train Control and Management System) through an Ethernet, a WLAN (Wireless Local Area Networks), a Telematics (vehicle information service), a V2X (Vehicle to X) or other wireless networks. The controller 101 can listen to the TCMS in real time to determine whether the TCMS sends a parking signal for indicating the vehicle to enter a preset parking area and to park. When the vehicle is running on the track and receives the parking signal sent by the TCMS, the vehicle can park. At this time, the controller 101 also receives the parking signal and sends a measurement instruction to the distance sensor 102. After receiving the measurement instruction, the distance sensor 102 sends a first measurement signal to the ranging baffle 103 and receives a second measurement signal reflected by the ranging baffle 103. The distance sensor 102 determines a first distance between the distance sensor 102 and the ranging baffle 103 according to the first measurement signal and the second measurement signal. The first distance can be understood as the distance between the position point of the ranging baffle 103 reflecting the second measurement signal back and the distance sensor 102. Finally, the distance sensor 102 sends the first distance to the controller 101.

[0062] After receiving the first distance sent by the distance sensor 102, the controller 101 can determine the parking accuracy of the vehicle entering the preset parking area according to the first distance, a preset reference distance and a preset angle. The reference distance is the distance between the distance sensor 102 and the ranging baffle 103 when the vehicle is parked at a reference position in the preset parking area. The reference position can be understood as the position of the vehicle in the preset parking area, i.e., the position of the vehicle when the vehicle is parked accurately. If the vehicle is parked at the reference position, the parking accuracy is 0.

[0063] In summary, the parking precision measurement system provided by the present disclosure includes a controller arranged on a vehicle, a distance sensor arranged at a preset position of the vehicle, and a distance measuring baffle arranged in a preset parking area. The controller is connected with the distance sensor. When the vehicle enters the preset parking area, the included angle between the distance measuring baffle and the plane where the distance sensor is arranged is a preset angle, and the measurement signal sent by the distance sensor can reach the distance measuring baffle. When the controller receives a parking signal indicating that the vehicle has entered the preset parking area and parked, the controller sends a measurement instruction to the distance sensor. The distance sensor sends a first measurement signal to the distance measuring baffle according to the measurement instruction and receives a second measurement signal reflected by the distance measuring baffle, so as to determine a first distance between the distance sensor and the distance measuring baffle. The controller receives the first distance sent by the distance sensor and determines the parking precision of the vehicle entering the preset parking area according to the first distance, a preset reference distance, and the preset angle. The present disclosure converts the parking precision measurement in the horizontal direction into the distance measurement in the vertical direction by using the distance sensor arranged on the vehicle and the distance measuring baffle arranged at the corresponding position in the parking area, so as to realize the automatic measurement of the parking precision without manual participation, and improve the measurement efficiency and accuracy of the parking precision.

[0064] In a specific implementation scenario, the distance sensor 102 can be at least one of an optical distance sensor, an infrared distance sensor, and an ultrasonic distance sensor. Correspondingly, if the distance sensor 102 is an optical distance sensor, the first measurement signal and the second measurement signal are both optical signals. If the distance sensor 102 is an infrared distance sensor, the first measurement signal and the second measurement signal are both infrared signals. If the distance sensor 102 is an ultrasonic distance sensor, the first measurement signal and the second measurement signal are both ultrasonic signals. The distance sensor 102 can determine the first distance according to the propagation speed of the measurement signal (i.e., the first measurement signal and the second measurement signal), and the difference between the time of transmitting the first measurement signal and the time of receiving the second measurement signal. Further, if the vehicle is parked, the doors are opened in two directions, i.e., in the driving direction, different stations can open the doors on the right side or the left side, respectively. Therefore, two distance sensors 102 can be arranged on the two sides of the vehicle. The parking signal sent by the TCMS can indicate which side of the door of the vehicle will be opened when parking. The controller 101 sends a measurement instruction to the corresponding distance sensor 102 according to the parking signal, so as to measure the parking precision.

[0065] Accordingly, the material and color of the ranging baffle 103 should meet the accuracy requirements of the distance sensor 102. For example, the color of the ranging baffle 103 is generally white (reflectivity greater than 90%) to ensure that the reflectivity reaches its maximum. The length of the ranging baffle 103 should be greater than the empirical range of vehicle parking accuracy (i.e., exceeding the maximum value of parking accuracy in both positive and negative directions), and the width of the ranging baffle 103 needs to meet the minimum requirements of the distance sensor 102. Furthermore, in order to minimize changes to the vehicle's driving environment, the distance sensor 102 can be installed at the bottom of the vehicle's door frame (i.e., the preset location). Correspondingly, the ranging baffle 103 can be fixed to the ground within the preset parking area, where the ground should be flat.

[0066] It should be noted that the preset angle (i.e., angle α) between the plane containing the ranging baffle 103 and the distance sensor 102 can be any angle within the range of greater than 0 and less than 90 degrees. If the preset angle is 0 or 90 degrees, meaning the plane containing the ranging baffle 103 and the distance sensor 102 is parallel or perpendicular, only the first distance can be measured, and it cannot be converted into parking accuracy. Furthermore, if the preset angle is 0 degrees, there will inevitably be interference between the ranging baffle 103 and the distance sensor 102 in the direction of vehicle movement, which will also affect the vehicle's operational safety.

[0067] Specifically, the controller 101 determines the parking accuracy by including the following steps:

[0068] 1) Determine the distance difference between the parking position and the reference position based on the difference between the first distance and the reference distance, and the preset angle.

[0069] 2) Use the distance difference as the parking accuracy.

[0070] like Figure 2 The diagram shows the positional relationship between the distance sensor 102 and the ranging baffle 103. The difference between the first distance and the reference distance, along with the distance difference between the parking position and the reference position, form a right triangle. Therefore, the distance difference can be determined based on a preset angle, and then used as the parking accuracy. If the parking position is at point A (i.e., in front of the reference position), then the first distance is longer than the reference distance, so the distance difference can be calculated as (first distance - reference distance) / tan(a). If the parking position is at point B (i.e., behind the reference position), then the first distance is shorter than the reference distance, so the distance difference can be calculated as -[(reference distance - first distance) / tan(a)].

[0071] Further, in order to facilitate measurement, the preset angle can be set as 45, and then the difference between the first distance and the reference distance, and the distance difference between the parking position and the reference position form an isosceles right triangle, and the distance difference is the difference between the first distance and the reference distance.

[0072] In an implementation scenario, in order to further improve the measurement accuracy of the parking precision, when the vehicle enters the preset parking area, the controller 101 can send multiple measurement instructions to make the distance sensor 102 measure the first distance multiple times, and multiple measurement values of the first distance can be obtained, and the controller 101 can determine the first distance according to the multiple measurement values of the first distance sent by the distance sensor 102. For example, the average value, the maximum value or the minimum value of the multiple measurement values of the first distance can be taken as the first distance. Finally, the parking precision is determined in combination with the reference distance and the preset angle.

[0073] In another implementation scenario, there are multiple preset parking areas, and at least one distance measuring baffle 103 is arranged in each preset parking area. Since the vehicle passes through multiple preset parking areas in the process of driving, the parking precision of the vehicle in multiple preset parking areas can be counted in actual application, and therefore the controller 101 is further configured to perform the following steps:

[0074] A) record the parking precision of each preset parking area when the vehicle enters the multiple preset parking areas.

[0075] B) determine the characteristic index of the vehicle in at least one preset parking area according to the parking precision of each preset parking area.

[0076] For example, the TCMS sends a parking signal to the controller 101 when the vehicle enters multiple preset parking areas, and the parking signal can further include the number of the preset parking area, the current time information, etc. The controller 101 measures the parking precision of the preset parking area according to each parking signal (one or more measurements can be performed in the preset parking area), and records the parking precision of the preset parking area. The controller 101 can remain in a dormant state when no parking signal is received, and at the same time, the distance sensor 102 is turned off to reduce the total power consumption of the system 100. The controller 101 can also record the number of the preset parking area corresponding to the parking precision, the current time information, etc. when recording the parking precision. Then, according to the parking precision of each preset parking area, the characteristic index of the vehicle in at least one preset parking area among the multiple preset parking areas can be determined. The characteristic index can be any statistical characteristic of the multiple parking precisions, such as the average value, the variance, the peak value, etc., but is not limited thereto.

[0077] Taking the characteristic index CPK (Process Capability Index) as an example, the controller 101 can be divided into the following two sub-steps when performing step B):

[0078] 1) According to the parking accuracy, the reference position and the length of the ranging stop plate 103 of each preset parking area, the process accuracy and the process precision of the vehicle parking in at least one preset parking area are determined.

[0079] 2) According to the process accuracy and the process precision, the CPK is determined.

[0080] For example, the process accuracy (Capability of Accuracy, Ca) and the process precision (Capability of Precision, Cp) of the vehicle parking in multiple preset parking areas can be determined according to the parking accuracy, the reference position and the length of the ranging stop plate 103 of each preset parking area. Wherein, Ca and Cp can be determined by the following formula:

[0081]

[0082]

[0083] Wherein, is the average value of multiple parking accuracies, C is the specification center, i.e. the reference position, T is the length of the ranging stop plate 103, i.e. the specification tolerance of the parking accuracy, which can be understood as the difference between the maximum value that can be measured in the positive direction and the maximum value that can be measured in the negative direction, and σ is the standard deviation of multiple parking accuracies. It should be noted that the process accuracy can reflect the consistency between the actual average value of the parking accuracy and the specification center value (i.e. the reference position), and the process precision can reflect the ratio between the specification tolerance width (i.e. the length T of the ranging stop plate 103) and the actual variation range of the parking accuracy. According to the process accuracy and the process precision, the process capability of the vehicle parking, i.e. CPK, can be determined.

[0084] Further, after Ca and Cp are determined, the CPK of the vehicle can be determined according to the following formula:

[0085] CPK = Cp (1 - |Ca|)

[0086] Further, multiple parking accuracies can be saved according to station classification to obtain the CPK of the vehicle of different stations, or all parking accuracies of stations can be regarded as a whole without distinction to obtain the CPK of the vehicle of all stations.

[0087] For example, during normal operation of the vehicle, the parking accuracy of each passing A station is recorded for 24 hours. The parking accuracy of the vehicle is measured continuously for 24 hours, and the error statistical analysis value of each time segment is obtained. For example, it can be found that the parking accuracy of the vehicle will slowly deteriorate after 10 hours of operation. Another example is that the parking accuracy of each station is unevenly distributed when the vehicle is running. In order to determine the distribution relationship of the parking accuracy, the station and the vehicle itself, the parking accuracy of 5 vehicles and 7 stations can be measured respectively, and the vehicle is continuously driven for 7 days and 24 hours. Each parking accuracy value is collected. The classification statistics of the parking accuracy of each station and the classification statistics of the parking accuracy of each vehicle can be obtained. In this way, it can be determined which vehicles in the 5 vehicles have a larger deviation in parking accuracy, and which stations in the 7 stations have a larger deviation in parking accuracy, so as to adjust the vehicle and the station respectively to improve the overall parking accuracy.

[0088] In summary, the parking accuracy measurement system provided by the present disclosure includes a controller arranged on the vehicle, a distance sensor arranged at a predetermined position of the vehicle, and a distance measuring baffle arranged in a predetermined parking area. The controller is connected with the distance sensor. When the vehicle enters the predetermined parking area, the included angle between the distance measuring baffle and the plane where the distance sensor is located is a predetermined angle, and the measurement signal sent by the distance sensor can reach the distance measuring baffle. When the controller receives a parking signal indicating that the vehicle has entered the predetermined parking area and parked, the controller sends a measurement instruction to the distance sensor. The distance sensor sends a first measurement signal to the distance measuring baffle according to the measurement instruction, and receives a second measurement signal reflected back by the distance measuring baffle, so as to determine a first distance between the distance sensor and the distance measuring baffle. The controller receives the first distance sent by the distance sensor, and determines the parking accuracy of the vehicle entering the predetermined parking area according to the first distance, a predetermined reference distance and the predetermined angle. The present disclosure converts the parking accuracy measurement in the horizontal direction into the distance measurement in the vertical direction by using the distance sensor arranged on the vehicle and the distance measuring baffle arranged at the corresponding position in the parking area, so as to realize the automatic measurement of the parking accuracy without manual participation, and improve the measurement efficiency and accuracy of the parking accuracy.

[0089] Figure 3 A flow chart of a parking accuracy measurement method according to an example embodiment is shown in FIG. 1. Figure 3 The method is applied to the parking accuracy measurement system described above, which includes a distance sensor arranged at a predetermined position of a vehicle, and a distance measuring baffle arranged in a predetermined parking area. When the vehicle enters the predetermined parking area, the included angle between the distance measuring baffle and the plane where the distance sensor is located is a predetermined angle, and the measurement signal sent by the distance sensor can reach the distance measuring baffle.

[0090] The method includes:

[0091] Step 201, upon receiving a parking signal, sending a measurement instruction to the distance sensor, the parking signal being used to indicate that the vehicle has entered a preset parking area and parked, the measurement instruction being used to instruct the distance sensor to send a first measurement signal to the ranging baffle and receive a second measurement signal reflected back by the ranging baffle to determine a first distance between the distance sensor and the ranging baffle.

[0092] Step 202, receiving the first distance sent by the distance sensor.

[0093] Step 203, determining the parking accuracy of the vehicle entering the preset parking area according to the first distance, a preset reference distance and a preset angle, the reference distance being the distance between the distance sensor and the ranging baffle when the vehicle is parked at a reference position in the preset parking area.

[0094] Figure 4 is a flowchart of another method for measuring parking accuracy according to an example embodiment, as shown in Figure 4 The implementation of step 203 can include the following steps:

[0095] Step 2031, determining a distance difference between the parking position and the reference position according to the difference between the first distance and the reference distance, and the preset angle.

[0096] Step 2032, taking the distance difference as the parking accuracy.

[0097] Figure 5 is a flowchart of another method for measuring parking accuracy according to an example embodiment, as shown in Figure 5 In the scenario where there are multiple preset parking areas, each of which is provided with at least one ranging baffle, the method can further include the following steps:

[0098] Step 204, recording the parking accuracy of each preset parking area when the vehicle enters the multiple preset parking areas.

[0099] Step 205, determining a characteristic index of the vehicle parking in the at least one preset parking area according to the parking accuracy of each preset parking area.

[0100] Figure 6 is a flowchart of another method for measuring parking accuracy according to an example embodiment, as shown in Figure 6 In the scenario where the characteristic index is a process capability index CPK, step 205 can include the following steps:

[0101] Step 2051, determining the process accuracy and the process precision of the vehicle parking in the at least one preset parking area according to the parking accuracy of each preset parking area, the reference position and the length of the ranging baffle.

[0102] Step 2052, according to the process accuracy and process precision, determine CPK.

[0103] As to the method in the above-mentioned embodiments, the specific implementation of each step has been described in detail in the embodiments related to the system, and will not be described in detail here.

[0104] In summary, the parking precision measurement method provided by the disclosure is applied to a parking precision measurement system, which includes a distance sensor arranged at a preset position of a vehicle and a distance measuring baffle arranged in a preset parking area. When the vehicle enters the preset parking area, the included angle between the distance measuring baffle and the plane where the distance sensor is located is a preset angle, and the measurement signal sent by the distance sensor can reach the distance measuring baffle. When a parking signal indicating that the vehicle has entered the preset parking area and parked is received, a measurement instruction is sent to the distance sensor. The distance sensor sends a first measurement signal to the distance measuring baffle according to the measurement instruction and receives a second measurement signal reflected back by the distance measuring baffle, so as to determine a first distance between the distance sensor and the distance measuring baffle. The first distance sent by the distance sensor is received, and the parking precision of the vehicle entering the preset parking area is determined according to the first distance, a preset reference distance and the preset angle. The disclosure converts the parking precision measurement in the horizontal direction into the measurement in the vertical direction by using the distance sensor arranged on the vehicle and the distance measuring baffle arranged at the corresponding position in the parking area, so as to realize the automatic measurement of the parking precision without manual participation, and improve the measurement efficiency and accuracy of the parking precision.

[0105] Figure 7 is a block diagram of an electronic device 300 according to an exemplary embodiment. The electronic device 300 is applied to the above-mentioned parking precision measurement system, which includes a distance sensor arranged at a preset position of a vehicle and a distance measuring baffle arranged in a preset parking area. When the vehicle enters the preset parking area, the included angle between the distance measuring baffle and the plane where the distance sensor is located is a preset angle, and the measurement signal sent by the distance sensor can reach the distance measuring baffle. As shown in Figure 7 The electronic device 300 can include a processor 301 and a memory 302. The electronic device 300 can further include one or more of a multimedia component 303, an input / output (I / O) interface 304, and a communication component 305.

[0106] The processor 301 is configured to control overall operations of the electronic device 300 to complete all or part of the steps of the parking precision measurement system described above. The memory 302 is configured to store various types of data to support the operations of the electronic device 300, which can include, for example, instructions for any application or method operating on the electronic device 300, and application-related data, such as contact data, sent and received messages, pictures, audio, video, and the like. The memory 302 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The multimedia component 303 can include a screen and an audio component. The screen can be, for example, a touch screen, and the audio component is configured to output and / or input audio signals. For example, the audio component can include a microphone configured to receive external audio signals. The received audio signals can be further stored in the memory 302 or transmitted through the communication component 305. The audio component also includes at least one speaker configured to output audio signals. The I / O interface 304 provides an interface between the processor 301 and other interface modules, which can be a keyboard, a mouse, a button, and the like. The buttons can be virtual buttons or physical buttons. The communication component 305 is configured to perform wired or wireless communication between the electronic device 300 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, near field communication (NFC), 2G, 3G or 4G, or a combination of one or more of them, so the corresponding communication component 305 can include a Wi-Fi module, a Bluetooth module, an NFC module.

[0107] In an exemplary embodiment, the electronic device 300 can be implemented by one or more Application Specific Integrated Circuit (ASIC), Digital Signal Processor (DSP), Digital Signal Processing Device (DSPD), Programmable Logic Device (PLD), Field Programmable Gate Array (FPGA), control unit, micro control unit, microprocessor or other electronic elements for executing the parking precision measurement system described above.

[0108] In another exemplary embodiment, a computer readable storage medium including program instructions which, when executed by a processor, implement the steps of the parking precision measurement system described above is also provided. For example, the computer readable storage medium can be the memory 302 described above including program instructions which can be executed by the processor 301 of the electronic device 300 to complete the parking precision measurement system described above.

[0109] In another exemplary embodiment, a computer program product is also provided, which contains a computer program capable of being executed by a programmable device, the computer program having code portions for executing the parking precision measurement system described above when executed by the programmable device.

[0110] In summary, the present disclosure is applied to a parking precision measurement system, which includes a distance sensor arranged at a predetermined position of a vehicle and a distance measuring baffle arranged in a predetermined parking area. When the vehicle enters the predetermined parking area, the included angle between the distance measuring baffle and the plane where the distance sensor is arranged is a predetermined angle, and the measurement signal sent by the distance sensor can reach the distance measuring baffle. When a parking signal indicating that the vehicle has entered the predetermined parking area and parked is received, a measurement instruction is sent to the distance sensor, the distance sensor sends a first measurement signal to the distance measuring baffle according to the measurement instruction, and receives a second measurement signal reflected back by the distance measuring baffle, so as to determine a first distance between the distance sensor and the distance measuring baffle. The first distance sent by the distance sensor is received, and the parking precision of the vehicle entering the predetermined parking area is determined according to the first distance, a predetermined reference distance and the predetermined angle. The present disclosure converts the parking precision measurement in the horizontal direction into the measurement in the vertical direction by using the distance sensor arranged on the vehicle and the distance measuring baffle arranged at the corresponding position in the parking area, so as to realize the automatic measurement of the parking precision without manual participation, and improve the measurement efficiency and accuracy of the parking precision.

[0111] The preferred embodiments of the present disclosure are described in detail above with reference to the drawings, but the present disclosure is not limited to the specific details in the above-described embodiments. Various simple modifications can be made to the technical solutions of the present disclosure within the technical concept of the present disclosure, and all of these simple modifications shall fall within the protection scope of the present disclosure.

[0112] In addition, it should be noted that each specific technical feature described in the above-described specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, various possible combinations are not described again by the present disclosure.

[0113] In addition, various different embodiments of the present disclosure can also be combined in any appropriate manner, as long as they do not deviate from the idea of the present disclosure, and they should also be considered as disclosed by the present disclosure.

Claims

1. A system for measuring parking accuracy, characterized in that, The system includes: a controller installed on the vehicle, two distance sensors installed at preset locations on both sides of the vehicle, and a distance measuring baffle installed within a preset parking area; The controller is connected to the two distance sensors. When the vehicle enters the preset parking area, the angle between the distance measuring baffle and the plane where the distance sensor is located is a preset angle, and the measurement signal sent by the distance sensor can reach the distance measuring baffle. The reflection coefficient of the distance measuring baffle is greater than a preset threshold, and the length of the distance measuring baffle is greater than a preset parking accuracy empirical range. The preset angle is greater than 0 degrees and less than 90 degrees. The controller is used to determine the target side of the vehicle door opening based on the parking signal when a parking signal is received, and send a measurement command to the distance sensor set on the target side. The parking signal is used to indicate that the vehicle has entered the preset parking area and stopped. The distance sensor disposed on the target side is used to send a first measurement signal to the ranging baffle according to the measurement command, and receive a second measurement signal reflected back by the ranging baffle, so as to determine a first distance between the distance sensor disposed on the target side and the ranging baffle. The distance sensor disposed on the target side is also used to send the first distance to the controller. The controller is further configured to receive the first distance sent by the distance sensor disposed on the target side, and determine the distance difference between the parking position and the reference position based on the difference between the first distance and a preset reference distance and the preset angle; use the distance difference as the parking accuracy of the vehicle entering the preset parking area, and the reference distance is the distance between the distance sensor disposed on the target side and the ranging baffle when the vehicle is parked at the reference position in the preset parking area; There are multiple preset parking areas, and at least one ranging baffle is provided in each preset parking area. The controller is also used for: Record the parking accuracy of each of the preset parking areas when the vehicle enters multiple preset parking areas; Based on the parking accuracy of each preset parking area, a characteristic index is determined for the vehicle to park in at least one of the preset parking areas.

2. The apparatus according to claim 1, characterized in that, The characteristic indicator is the process capability index CPK, and the controller is used for: Based on the parking accuracy of each preset parking area, the reference position, and the length of the ranging baffle, the process accuracy and process precision of the vehicle parking in at least one preset parking area are determined. The CPK is determined based on the process accuracy and the process precision.

3. The apparatus according to claim 1 or 2, characterized in that, The distance sensor is at least one of an optical distance sensor, an infrared distance sensor, and an ultrasonic distance sensor.

4. The apparatus according to claim 1 or 2, characterized in that, The preset location is the bottom of the door frame of the vehicle; The ranging baffle is set on the ground within the preset parking area.

5. A method for measuring parking accuracy, characterized in that, A measurement system for parking accuracy includes: two distance sensors installed at preset locations on both sides of the vehicle, and a distance measuring baffle installed within a preset parking area; When the vehicle enters the preset parking area, the angle between the ranging baffle and the plane where the distance sensor is located is a preset angle, and the measurement signal sent by the distance sensor can reach the ranging baffle. The reflection coefficient of the ranging baffle is greater than a preset threshold, and the length of the ranging baffle is greater than a preset parking accuracy empirical range. The preset angle is greater than 0 degrees and less than 90 degrees. The method includes: Upon receiving a parking signal, the target side of the vehicle door is determined based on the parking signal, and a measurement command is sent to the distance sensor located on the target side. The parking signal indicates that the vehicle has entered the preset parking area and stopped. The measurement command instructs the distance sensor located on the target side to send a first measurement signal to the distance measuring baffle and receive a second measurement signal reflected back by the distance measuring baffle, so as to determine a first distance between the distance sensor located on the target side and the distance measuring baffle. Receive the first distance sent by the distance sensor located on the target side; Based on the difference between the first distance and the preset reference distance, and the preset angle, the distance difference between the parking position and the reference position is determined; the distance difference is used as the parking accuracy of the vehicle entering the preset parking area, and the reference distance is the distance between the distance sensor and the ranging baffle set on the target side when the vehicle is parked at the reference position in the preset parking area; There are multiple preset parking areas, and at least one ranging baffle is provided in each preset parking area; The method further includes; Record the parking accuracy of each of the preset parking areas when the vehicle enters multiple preset parking areas; Based on the parking accuracy of each preset parking area, a characteristic index is determined for the vehicle to park in at least one of the preset parking areas.

6. The method according to claim 5, characterized in that, The characteristic index is the process capability index CPK. Determining the characteristic index of the vehicle parking in at least one of the preset parking areas based on the parking accuracy of each preset parking area includes: Based on the parking accuracy of each preset parking area, the reference position, and the length of the ranging baffle, the process accuracy and process precision of the vehicle parking in at least one preset parking area are determined. The CPK is determined based on the process accuracy and the process precision.

7. An electronic device, characterized in that, A measurement system for parking accuracy, the system comprising: a distance sensor disposed at a preset location on the vehicle, and a distance measuring baffle disposed within a preset parking area; When the vehicle enters the preset parking area, the angle between the ranging baffle and the plane where the distance sensor is located is a preset angle, and the measurement signal sent by the distance sensor can reach the ranging baffle. The reflection coefficient of the ranging baffle is greater than a preset threshold, and the length of the ranging baffle is greater than a preset parking accuracy empirical range. The preset angle is greater than 0 degrees and less than 90 degrees. The electronic device includes: A memory on which computer programs are stored; A processor for executing the computer program in the memory to implement the steps of the method of claim 5 or 6.

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