Method, device and terminal equipment for detecting installation position of device

Abstract

The application is suitable for the field of intelligent traffic technology, and provides a device installation position detection method and device and terminal equipment, comprising: detecting the transmitting performance and receiving performance of an ETC on-vehicle unit model relative to an ETC roadside unit model in a simulation environment during movement of a vehicle model in the simulation environment, wherein the simulation environment is generated according to actual installation parameters of the ETC on-vehicle unit and roadside unit, and the actual installation parameters comprise constant parameters and variable parameters; if the transmitting performance and / or the receiving performance does not meet a preset condition, adjusting the variable parameters in the actual installation parameters, wherein the preset condition is determined according to the constant parameters in the actual installation parameters; and if the transmitting performance and the receiving performance both meet the preset condition, determining the current actual installation parameters as target parameters. Through the above method, the ETC charging success rate is effectively improved, and user experience is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of intelligent transportation, and particularly relates to a device installation position detection method and device and a terminal device. BACKGROUND

[0002] The current electronic toll collection (ETC) system is an automatic toll collection system. In the system, through the dedicated short-range communication between the on board unit (OBU) installed on the windshield of a vehicle and the road side unit (RSU) installed on the ETC lane, the computer networking technology is used to perform the background settlement with the bank, so as to achieve the purpose of paying the highway or bridge fee without stopping at the highway or bridge toll station.

[0003] At present, the installation position of the ETC-OBU is generally unified, that is, the OBU is installed on the front windshield of the vehicle. The OBU is preferably installed in the central position above the front windshield for small passenger vehicles, and is preferably installed below the front windshield for large passenger vehicles. For vehicles that have a microwave window in the front windshield in advance, the OBU is preferably installed at the microwave window position. The microwave window is generally set according to experience. However, in actual application, due to the influence of factors such as the device performance of the OBU / RSU and the lane environment, the above installation position is not necessarily a reasonable position, which can easily lead to toll failure and reduce user experience. SUMMARY

[0004] The embodiments of the present application provide a device installation position detection method and device and a terminal device, which can effectively improve the ETC toll success rate and improve user experience.

[0005] In a first aspect, the embodiments of the present application provide a device installation position detection method, comprising:

[0006] In the process of moving the vehicle model in the simulation environment, the transmission performance and the reception performance of the OBU model in the simulation environment relative to the RSU model are detected, wherein the simulation environment is generated according to the actual installation parameters of the OBU and the RSU of the ETC, and the actual installation parameters include constant parameters and variable parameters;

[0007] If the transmission performance and / or the reception performance do not meet the preset condition, the variable parameters in the actual installation parameters are adjusted, wherein the preset condition is determined according to the constant parameters in the actual installation parameters;

[0008] If the transmission performance and the reception performance both meet the preset condition, the current actual installation parameters are determined as the target parameters.

[0009] In the embodiments of the application, the actual installation parameters of the device are used to generate a simulation environment, in which the installation position of the device is determined to be reasonable by detecting the transmission performance and the receiving performance of the device model, and if not, the actual installation parameters are adjusted until a reasonable installation position is determined. Through the above method, a reasonable installation position is simulated according to the actual installation parameters of the device, which effectively improves the ETC charging success rate and improves the user experience.

[0010] In a possible implementation of the first aspect, the step of detecting the transmission performance of the on-board unit model of the ETC relative to the road-side unit model of the ETC comprises:

[0011] obtaining a first antenna gain of the road-side unit model in the direction of the on-board unit model;

[0012] calculating a first transmission power of the on-board unit model to the road-side unit model;

[0013] when the first transmission power is greater than or equal to a first receiving sensitivity of the road-side unit model, detecting the transmission performance according to the first transmission power and the first antenna gain.

[0014] In a possible implementation of the first aspect, the step of obtaining the first antenna gain of the road-side unit model in the direction of the on-board unit model comprises:

[0015] calculating a first coordinate of the on-board unit model relative to the road-side unit model in a first coordinate system, wherein the first coordinate system is a coordinate system with the position of the road-side unit model as the origin;

[0016] calculating the first antenna gain according to the first coordinate.

[0017] In a possible implementation of the first aspect, the transmission performance comprises a first communication distance of a vehicle at a toll entrance and a second communication distance of a vehicle in a free flow environment.

[0018] The step of detecting the transmission performance according to the first transmission power and the first antenna gain when the first transmission power is greater than or equal to the first receiving sensitivity of the road-side unit model comprises:

[0019] when the first transmission power is greater than or equal to the first receiving sensitivity of the road-side unit model, calculating the first communication distance and / or the second communication distance according to the first transmission power and the first antenna gain.

[0020] In a possible implementation manner of the first aspect, the step of detecting the receiving performance of the on-board unit model of the ETC relative to the road-side unit model of the ETC comprises the following steps.

[0021] obtaining a second antenna gain of the on-board unit model in the direction of the road-side unit model;

[0022] calculating a second transmission power of the road-side unit model to the on-board unit model;

[0023] when the second transmission power is greater than or equal to a second receiving sensitivity of the on-board unit model, detecting the receiving performance according to the second transmission power and the second antenna gain.

[0024] In a possible implementation manner of the first aspect, the step of obtaining the second antenna gain of the on-board unit model in the direction of the road-side unit model comprises the following steps.

[0025] calculating a second coordinate of the road-side unit model relative to the on-board unit model in a second coordinate system, wherein the second coordinate system is a coordinate system with the position of the on-board unit model as the origin;

[0026] calculating the second antenna gain according to the second coordinate.

[0027] In a possible implementation manner of the first aspect, the receiving performance comprises a third communication distance of a vehicle at a tollgate and a fourth communication distance of a vehicle in a free flow environment.

[0028] The step of detecting the receiving performance according to the second transmission power and the second antenna gain when the second transmission power is greater than or equal to the second receiving sensitivity of the on-board unit model comprises the following steps.

[0029] when the second transmission power is greater than or equal to the second receiving sensitivity of the on-board unit model, calculating the third communication distance and / or the fourth communication distance according to the second transmission power and the second antenna gain.

[0030] In a second aspect, an embodiment of the present application provides a device installation position detection apparatus, comprising:

[0031] a detection unit configured to detect, in a process of moving a vehicle model in a simulation environment, a transmission performance and a receiving performance of an on-board unit model of an ETC relative to a road-side unit model of the ETC, wherein the simulation environment is generated according to actual installation parameters of the on-board unit and the road-side unit, and the actual installation parameters comprise constant parameters and variable parameters.

[0032] an adjusting unit configured to adjust a variable parameter in the actual installation parameter if the transmitting performance and / or the receiving performance does not satisfy a preset condition, wherein the preset condition is determined according to a constant parameter in the actual installation parameter;

[0033] a result unit configured to determine the current actual installation parameter as a target parameter if both the transmitting performance and the receiving performance satisfy a preset condition.

[0034] In a third aspect, an embodiment of the present application provides a terminal device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, and the processor implements the device installation position detection method according to any one of the first aspect when executing the computer program.

[0035] In a fourth aspect, an embodiment of the present application provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the device installation position detection method according to any one of the first aspect.

[0036] In a fifth aspect, an embodiment of the present application provides a computer program product, which, when running on a terminal device, enables the terminal device to execute the device installation position detection method according to any one of the first aspect.

[0037] It can be understood that the beneficial effects of the second aspect to the fifth aspect can be referred to the related description of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0039] Figure 1 is a flowchart of the device installation position detection method provided by the embodiments of the present application;

[0040] Figure 2 is a schematic diagram of a coordinate system provided by the embodiments of the present application;

[0041] Figure 3 is a structural schematic diagram of the device installation position detection apparatus provided by the embodiments of the present application.

[0042] Figure 4 is a structural schematic diagram of the terminal device provided by the embodiments of the present application. DETAILED DESCRIPTION

[0043] In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular architectures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known methods, devices, circuits, and

[0044] It will be understood that the terms "comprises" and / or "comprising," when used in this specification, include the presence of one or more features, integers, steps, operations, elements, and / or components described in the specification, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0045] It will be understood that the term "and / or," when used in the specification and in the following claims, is intended to mean one or more of the associated listed items can be present, and includes the possibilities of one or more of the associated listed items being present, and / or the possibility of none of the associated listed items being present.

[0046] As used in the description of the application and the following claims, the term "if" can be interpreted to mean "when" or "upon" or "in response to determining" or "in response to detecting" depending on the context. Similarly, the phrase "if it is determined" or "if [a described condition or event] is detected" can be interpreted to mean "upon determining" or "in response to determining" or "upon [the described condition or event] being detected" or "in response to [the described condition or event] being detected," depending on the context.

[0047] In addition, the terms "first," "second," "third," etc. are used herein only to distinguish one element from another, and do not imply a relative importance or a given order.

[0048] The terms "a or an" as used herein mean "one or more" when used in the description of the application and the following claims unless otherwise indicated. As used in the description of the application and the following claims, the term "plurality" means "two or more," unless otherwise indicated. As used in the description of the application and the following claims, the term "one or more of’ means "one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve, thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen, twenty, twenty-one, twenty-two, twenty-three, twenty-four, twenty-five, or more," unless otherwise indicated.

[0049] The current electronic toll collection (ETC) system is an automatic toll collection system. In the system, through the dedicated short-range communication between the on board unit (OBU) installed on the windshield of the vehicle and the road side unit (RSU) installed on the ETC lane, the computer networking technology and the bank are used for the background settlement processing, so as to achieve the purpose of paying the highway or bridge fee without stopping at the highway or bridge toll station.

[0050] At present, the installation position of the ETC-OBU is generally unified, that is, the OBU is integrally installed on the front windshield of the vehicle. The small passenger car is preferably installed in the central position above the front windshield of the vehicle; the large passenger car is preferably installed below the front windshield; and for the vehicle with a microwave window left in the front windshield in advance, the OBU is preferably installed at the microwave window position. However, in actual application, due to the influence of the device performance of the OBU / RSU, the lane environment and other factors, the above installation position is not necessarily the best position, which is easy to cause the toll failure and reduce the user experience.

[0051] In order to solve the above problems, the embodiment of the present application provides a device installation position detection method. In the method, the actual installation parameters related to the device installation are extracted, and the parameters are classified; then the simulation environment is generated by using the actual installation parameters of the device, in the simulation environment, whether the installation position of the device is reasonable is judged by detecting the transmission performance and the receiving performance of the device model; in addition, in order to evaluate whether the installation position of the device is reasonable, the coordinate system of the on board unit relative to the road side unit is established. Through the above method, the ETC toll success rate is effectively improved, and the user experience is improved.

[0052] Firstly, the influence factors of the ETC-OBU installation position are introduced, which include the following aspects:

[0053] (1) The ETC-OBU aspect, the influence factors include the installation position elements and the ETC-OBU performance elements, the installation position elements include the distance from the ground height, the elevation angle (such as θ angle) and the azimuth angle (such as angle), the OBU in-vehicle point coordinates, the glass medium parameters, the distance from the glass, and the distance from the surrounding metal objects, the ETC-OBU performance elements include the equivalent isotropically radiated power (e.i.r.p), the wake-up sensitivity and the receiving sensitivity.

[0054] (2) ETC-RSU side, the influencing factors include installation position elements and ETC-RSU performance elements, the installation position elements include distance from ground height, distance from ground angle and position relative to lane center, and the performance elements include e.i.r.p and receiving sensitivity.

[0055] (3) Lane environment side, including lane width and turning angle, etc.

[0056] (4) Vehicle side, the influencing factors include vehicle speed and vehicle length. The vehicle speed includes vehicle speed in entrance and exit environment and vehicle speed in free flow environment. The OBU in-vehicle coordinate includes lane direction coordinate position and vertical lane direction coordinate position.

[0057] (5) Transaction time, this factor is the longest transaction time obtained through sampling analysis.

[0058] As can be seen from the above, there are many factors affecting the installation position of the ETC-OBU, and it is difficult to quantitatively analyze. In order to solve this problem, the embodiments of the application classify the above influencing factors, one class is constant parameter and one class is variable parameter.

[0059] Specifically, the height, elevation angle (such as θ angle) and azimuth angle (such as φ angle) of the OBU installation are defined as variable parameters, which are affected by user behavior. Other factors are controllable, so they are considered as constant parameters, as follows:

[0060] (1) ETC-OBU side:

[0061] a) e.i.r.p is defined as a constant, such as 0 dBm.

[0062] b) Receiving sensitivity is defined as a constant, such as -70 dBm.

[0063] c) Glass dielectric constant is known, such as 6.

[0064] d) Distance from glass is known, such as 5 mm.

[0065] e) Distance from surrounding metal is known, such as 11 mm.

[0066] (2) ETC-RSU side

[0067] a) e.i.r.p is defined as a constant, such as 33 dBm.

[0068] b) Receiving sensitivity is defined as a constant, such as 60 dBm for entrance and exit and 85 dBm for free flow.

[0069] c) RSU installation height is defined as a constant, such as 5 m for entrance and exit and 8.1 m for free flow.

[0070] ​d) RSU installation angle is defined as a constant, such as 45° for the entrance and exit and 60° for the free flow.

[0071] e) The distance between the RSU and the center of the lane is defined as a constant, such as 0m.

[0072] (3) Lane environment

[0073] a) The lane width is known, such as 3.4m.

[0074] b) The turning angle is known, such as 0°.

[0075] (4) Vehicle

[0076] a) The maximum speed is known, such as 40km / h for the entrance and exit and 180km / h for the free flow.

[0077] b) The vehicle length is known, such as 5m.

[0078] (5) Transaction time

[0079] The maximum transaction time is known, such as 530ms.

[0080] According to the above constant parameters, the constraint conditions, i.e. the preset conditions described in the following embodiments, can be calculated.

[0081] For example, according to the constant parameters in (4) and (5) above, the preset condition can be calculated as: the transaction distance of the entrance and exit is less than 6m, and the transaction distance of the free flow is less than 26m.

[0082] Through the above classification of actual parameters, the influencing factors of OBU installation position are simplified, which is equivalent to defining a specific scenario, evaluating the installation position of OBU in the specific scenario, and realizing the quantitative evaluation of device installation position.

[0083] Reference Figure 2 is a flowchart of the device installation position detection method provided by the embodiments of the present application, which is an example and not limited to the method, which can include the following steps:

[0084] S101, in the process of moving the vehicle model in the simulation environment, detecting the transmission performance and reception performance of the on-board unit model of the ETC in the simulation environment relative to the road side unit model of the ETC.

[0085] Wherein, the simulation environment is generated according to the actual installation parameters of the on-board unit and road side unit of the ETC, and the actual installation parameters include constant parameters and variable parameters.

[0086] The simulation environment includes a mounting model of the OBU and a mounting model of the RSU. The mounting model of the OBU includes a three-dimensional model of an OBU shell, a PCB model, an antenna model, a glass and interlayer model, and a peripheral metal object model. The mounting model of the RSU includes a three-dimensional model of a shell, a PCB model, an antenna model, and a peripheral metal object model.

[0087] After the simulation environment is determined, antenna directivity simulation needs to be performed.

[0088] The RSU and the lane are relative to the earth coordinate system and are not changed, but the OBU is mobile, so scene case analysis needs to be performed. With the movement of the OBU, the coordinate change of the RSU in the coordinate system centered on the OBU is determined, to analyze whether the receiving performance of the OBU meets the requirements; the change of the OBU in the coordinate system centered on the RSU is determined, to analyze whether the transmitting performance of the OBU meets the requirements.

[0089] After the scene case analysis, the gain of the OBU and the RSU antenna in different scene cases can be queried according to the simulation results. Through the gain of the antenna, combined with constant parameters such as e.i.r.p, wake-up sensitivity, and receiving sensitivity, the installation position of the OBU can be evaluated.

[0090] In some embodiments, the step of detecting the transmitting performance of the vehicle-mounted unit model of the ETC relative to the road-side unit model of the ETC includes:

[0091] obtaining a first antenna gain of the road-side unit model in the direction of the vehicle-mounted unit model;

[0092] calculating a first transmitting power of the vehicle-mounted unit model to the road-side unit model;

[0093] when the first transmitting power is greater than or equal to a first receiving sensitivity of the road-side unit model, detecting the transmitting performance according to the first transmitting power and the first antenna gain.

[0094] When detecting the transmitting performance of the OBU, the OBU is the transmitting end, and the RSU is the receiving end. The judgment condition is that if the transmitting power (i.e., the first transmitting power) of the OBU to the RSU after attenuation of the e.i.r.p of the OBU is greater than or equal to the receiving sensitivity (i.e., the first receiving sensitivity) of the RSU, it is considered that the RSU can receive the information of the OBU, and the transmitting performance is detected at this time. If the transmitting power of the OBU to the RSU after attenuation of the e.i.r.p of the OBU is less than the receiving sensitivity of the RSU, it is considered that the RSU cannot receive the information of the OBU; in this case, the transmitting performance needs to be continuously monitored with the movement of the vehicle model, and when the transmitting power (i.e., the first transmitting power) of the OBU to the RSU after attenuation of the e.i.r.p of the OBU is greater than or equal to the receiving sensitivity of the RSU, the transmitting performance is detected again.

[0095] Optionally, the first antenna gain is calculated in the following way:

[0096] calculating a first coordinate of the vehicle-mounted unit model relative to the road-side unit model in a first coordinate system, wherein the first coordinate system is a coordinate system with the position of the road-side unit model as an origin; and calculating the first antenna gain according to the first coordinate.

[0097] Referring to Figure 2 is a schematic diagram of a coordinate system provided by an embodiment of the present application.

[0098] When the OBU is taken as an origin O, corresponding to a second coordinate system, the original coordinates P of the RSU are (x, y, z), and when the coordinate system is counterclockwise rotated by F along the Y axis, the point P(x, y, z) is clockwise rotated by F around the Y axis to obtain a point P'(x', y', z'), and the coordinate change is as follows:

[0099]

[0100] Similarly, when the coordinate system is counterclockwise rotated by F along the X axis, the point P(x, y, z) is clockwise rotated by F around the X axis to obtain a point P''(x'', y'', z''), and the coordinate change is as follows:

[0101]

[0102] When the coordinate system is counterclockwise rotated by F along the Z axis, the point P(x, y, z) is clockwise rotated by F around the Z axis to obtain a point P'''(x''', y''', z'''), and the coordinate change is as follows:

[0103]

[0104] In an actual application scenario, Y is considered to be constant, and X and Z change with the movement of the vehicle along the lane direction, so the formula 1 is usually used to calculate the coordinates of the road-side unit relative to the vehicle-mounted unit.

[0105] When the RSU is taken as an origin, corresponding to a first coordinate system, the original coordinates P of the OBU are (x, y, z), and when the coordinate system is counterclockwise rotated by F along the Y axis, the point P(x, y, z) is clockwise rotated by F around the Y axis to obtain a point P'(x', y', z'), and the coordinate change is as follows:

[0106]

[0107] As Figure 2 In the embodiment, the first coordinate of the vehicle-mounted unit model relative to the road-side unit model can be calculated according to the formula 4. Further, the distance of the vehicle-mounted unit model relative to the road-side unit model is calculated according to the first coordinate, and the first antenna gain is calculated according to the distance.

[0108] In the embodiments of the present application, the transmission performance includes a first communication distance of the vehicle at the toll entrance and a second communication distance of the vehicle in a free flow environment. Correspondingly, the detection manner of the transmission performance includes:

[0109] When the first transmission power is greater than or equal to the first receiving sensitivity of the road side unit model, the first communication distance and / or the second communication distance is calculated according to the first transmission power and the first antenna gain.

[0110] For example, the communication distance is calculated by the formula PT-PR-GT+GR, wherein PT represents the transmission power of the transmission end, PR represents the receiving sensitivity of the receiving end, GT represents the antenna gain of the receiving end, and GR represents the antenna gain of the transmission end.

[0111] Similarly, in some embodiments, the step of detecting the receiving performance of the on-board unit model of the ETC relative to the road side unit model of the ETC includes:

[0112] obtaining a second antenna gain of the on-board unit model in the direction of the road side unit model;

[0113] calculating a second transmission power of the road side unit model to the on-board unit model;

[0114] When the second transmission power is greater than or equal to the second receiving sensitivity of the on-board unit model, the receiving performance is detected according to the second transmission power and the second antenna gain.

[0115] When detecting the receiving performance of the OBU, the OBU is the receiving end and the RSU is the transmission end. The judgment condition is that if the transmission power (i.e., the second transmission power) of the e.i.r.p of the RSU after attenuation to the OBU is greater than or equal to the wake-up sensitivity (i.e., the second receiving sensitivity) of the OBU, it is considered that the OBU can receive the information of the RSU, and the receiving performance is detected at this time. If the transmission power of the e.i.r.p of the RSU after attenuation to the OBU is less than the wake-up sensitivity of the OBU after the OBU is woken up, it is considered that the OBU cannot receive the information of the RSU. In this case, the movement of the vehicle model needs to be continued to be monitored, and when the transmission power (i.e., the second transmission power) of the e.i.r.p of the RSU after attenuation to the OBU is greater than or equal to the wake-up sensitivity of the OBU, the receiving performance is detected again.

[0116] Optionally, the calculation manner of the second antenna gain includes:

[0117] calculating a second coordinate of the road side unit model relative to the on-board unit model in a second coordinate system, wherein the second coordinate system is a coordinate system with the position of the on-board unit model as the origin; and calculating the second antenna gain according to the second coordinate.

[0118] As Figure 2 According to the formula 1, the second coordinate of the RSU model relative to the OBU model can be calculated. Further, the distance of the RSU model relative to the OBU model is calculated according to the second coordinate, and the second antenna gain is calculated according to the distance.

[0119] In the embodiments of the present application, the receiving performance includes a third communication distance of the vehicle at the toll gate and a fourth communication distance of the vehicle in the free flow environment. Correspondingly, the detection method of the receiving performance includes:

[0120] When the second transmission power is greater than or equal to the second receiving sensitivity of the OBU model, the third communication distance and the fourth communication distance are calculated according to the second transmission power and the second antenna gain.

[0121] The calculation method of the third communication distance and the fourth communication distance is the same as that of the first communication distance and the second communication distance. For details, refer to the description in the above embodiments, which will not be described here.

[0122] S102, if the transmission performance and / or the receiving performance do not meet the preset conditions, adjusting the variable parameters in the actual installation parameters.

[0123] Adjusting the variable parameters is equivalent to adjusting the height, elevation angle (such as θ angle) and azimuth angle (such as angle) of the OBU installation which are affected by user behavior. After adjustment, the simulation is performed again according to the adjusted actual installation parameters until the transmission performance and the receiving performance meet the preset conditions.

[0124] S103, if the transmission performance and the receiving performance both meet the preset conditions, the current actual installation parameters are determined as the target parameters.

[0125] It should be noted that when the vehicle model needs to pay at the toll gate, the first communication distance and the third communication distance are used as the indicators for evaluating the transmission performance / receiving performance. When the vehicle model needs to pay in the free flow, the second communication distance and the fourth communication distance are used as the indicators for evaluating the transmission performance / receiving performance.

[0126] For example, it is assumed that the preset condition is that the transaction distance of the toll gate is less than 6 m and the transaction distance of the free flow is less than 26 m. When the vehicle model needs to pay at the toll gate, it is determined whether the first communication distance is less than 6 m. If yes, it is determined that the transmission performance meets the preset condition. It is determined whether the third communication distance is less than 6 m. If yes, it is determined that the receiving performance meets the preset condition. When the vehicle model needs to pay in the free flow, it is determined whether the second communication distance is less than 26 m. If yes, it is determined that the transmission performance meets the preset condition. It is determined whether the fourth communication distance is less than 26 m. If yes, it is determined that the receiving performance meets the preset condition.

[0127] In the embodiments of the present application, the actual installation parameters related to the installation of the device are extracted, and these parameters are classified, providing a data basis for the quantitative analysis of the installation position. Then, a simulation environment is generated using the actual installation parameters of the device. In the simulation environment, the transmission performance and the receiving performance of the device model are detected to determine whether the installation position of the device is reasonable. In addition, in order to evaluate whether the installation position of the device is reasonable, a judgment standard is provided, and a coordinate system of the on-board unit relative to the road side unit is established. Through the above method, if the judgment result is unreasonable, the actual installation parameters are adjusted until a reasonable installation position is determined. In other words, a reasonable installation position is simulated according to the actual installation parameters of the device, which effectively improves the ETC charging success rate and improves the user experience.

[0128] It should be noted that the method provided by the embodiments of the present application can be applied to the ETC application scenario as described in the above embodiments, and can also be applied to other intelligent transportation, automatic driving and other application scenarios involving on-board unit installation. The embodiments of the present application do not make specific limitations.

[0129] It should be understood that the size of the serial number of each step in the above embodiments does not mean the order of execution. The execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0130] Corresponding to the device installation position detection method described in the above embodiments, Figure 3 is a structural block diagram of the device installation position detection device provided by the embodiments of the present application. For ease of illustration, only the parts related to the embodiments of the present application are shown.

[0131] Referring to Figure 3 , the device comprises:

[0132] The detection unit 31 is configured to detect the transmission performance and the receiving performance of the on-board unit model of the ETC relative to the road side unit model of the ETC in the process of moving the vehicle model in the simulation environment, wherein the simulation environment is generated according to the actual installation parameters of the on-board unit and the road side unit, and the actual installation parameters include constant parameters and variable parameters.

[0133] The adjusting unit 32 is configured to adjust a variable parameter in the actual installation parameter if the transmission performance and / or the reception performance does not satisfy a preset condition, wherein the preset condition is determined according to a constant parameter in the actual installation parameter.

[0134] The result unit 33 is configured to determine the current actual installation parameter as a target parameter if both the transmission performance and the reception performance satisfy the preset condition.

[0135] Optionally, the detecting unit 31 is further configured to:

[0136] obtain a first antenna gain of the road side unit model in a direction of the vehicle-mounted unit model;

[0137] calculate a first transmission power of the vehicle-mounted unit model to the road side unit model;

[0138] detect the transmission performance according to the first transmission power and the first antenna gain when the first transmission power is greater than or equal to a first reception sensitivity of the road side unit model.

[0139] Optionally, the detecting unit 31 is further configured to:

[0140] calculate a first coordinate of the vehicle-mounted unit model relative to the road side unit model in a first coordinate system, wherein the first coordinate system is a coordinate system with the position of the road side unit model as an origin;

[0141] calculate the first antenna gain according to the first coordinate.

[0142] Optionally, the transmission performance includes a first communication distance of a vehicle at a toll entrance and a second communication distance of a vehicle in a free flow environment.

[0143] Correspondingly, the detecting unit 31 is further configured to:

[0144] calculate the first communication distance and / or the second communication distance according to the first transmission power and the first antenna gain when the first transmission power is greater than or equal to a first reception sensitivity of the road side unit model.

[0145] Optionally, the detecting unit 31 is further configured to:

[0146] obtain a second antenna gain of the vehicle-mounted unit model in a direction of the road side unit model;

[0147] calculate a second transmission power of the road side unit model to the vehicle-mounted unit model;

[0148] when the second transmission power is greater than or equal to the second receiving sensitivity of the on-board unit model, the receiving performance is detected according to the second transmission power and the second antenna gain.

[0149] Optionally, the detection unit 31 is further configured to:

[0150] calculate a second coordinate of the road-side unit model relative to the on-board unit model in a second coordinate system, wherein the second coordinate system is a coordinate system with the location of the on-board unit model as the origin;

[0151] calculate the second antenna gain according to the second coordinate.

[0152] Optionally, the receiving performance includes a third communication distance of a vehicle at a tollgate and a fourth communication distance of a vehicle in a free flow environment.

[0153] Correspondingly, the detection unit 31 is further configured to:

[0154] when the second transmission power is greater than or equal to the second receiving sensitivity of the on-board unit model, the third communication distance and / or the fourth communication distance is calculated according to the second transmission power and the second antenna gain.

[0155] It should be noted that the information interaction, execution process and the like between the above apparatuses / units are based on the same concept as the method embodiments of the present application, and the specific functions and the technical effects brought by the same can be referred to the method embodiments part, which will not be described here.

[0156] In addition, Figure 3 The device installation position detection apparatus shown can be a software unit, a hardware unit or a software and hardware combined unit built in an existing terminal device, can be integrated into the terminal device as an independent pendant, or can exist as an independent terminal device.

[0157] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0158] Figure 4 This is a schematic diagram of the structure of the terminal device provided in the embodiments of this application. For example... Figure 4 As shown, the terminal device 4 in this embodiment includes: at least one processor 40 ( Figure 4 (Only one is shown) a processor, a memory 41, and a computer program 42 stored in the memory 41 and executable on the at least one processor 40, wherein the processor 40 executes the computer program 42 to implement the steps in the embodiments of the detection method for any of the above-described device installation locations.

[0159] The terminal device may be a desktop computer, laptop, handheld computer, or cloud server, etc. This terminal device may include, but is not limited to, a processor and memory. Those skilled in the art will understand that... Figure 4 This is merely an example of terminal device 4 and does not constitute a limitation on terminal device 4. It may include more or fewer components than shown in the figure, or combine certain components, or different components. For example, it may also include input / output devices, network access devices, etc.

[0160] The processor 40 can be a central processing unit (CPU), and can also be other general-purpose processors, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0161] The memory 41 can be an internal storage unit of the terminal device 4 in some embodiments, for example, a hard disk or a memory of the terminal device 4. The memory 41 can also be an external storage device of the terminal device 4 in other embodiments, for example, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. Further, the memory 41 can include both an internal storage unit and an external storage device of the terminal device 4. The memory 41 is used to store an operating system, an application program, a boot loader, data, and other programs, for example, program codes of the computer program, etc. The memory 41 can also be used to temporarily store data that has been output or will be output.

[0162] The embodiments of the present application further provide a computer readable storage medium, which stores a computer program. The computer program is executed by a processor to implement the steps in the above-mentioned various method embodiments.

[0163] The embodiments of the present application provide a computer program product. When the computer program product is run on a terminal device, the terminal device executes the steps in the above-mentioned various method embodiments.

[0164] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the present application can implement all or part of the processes in the above-mentioned embodiment methods through a computer program to instruct relevant hardware to complete, and the computer program can be stored in a computer readable storage medium. When the computer program is executed by a processor, the steps of each method embodiment described above can be implemented. The computer program includes computer program code, which can be in the form of source code, object code, executable files or some intermediate forms. The computer readable medium at least includes any entity or device capable of carrying the computer program code to the device / terminal equipment, recording medium, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium. For example, U disk, mobile hard disk, magnetic disk or optical disk, etc. In some jurisdictions, according to legislation and patent practice, the computer readable medium can not be an electrical carrier signal and a telecommunication signal.

[0165] In the above embodiments, the description of each embodiment has its own focus, and the parts not described or recorded in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0166] Those skilled in the art can appreciate that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. The skilled person can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0167] In the embodiments provided in the present application, it should be understood that the disclosed apparatus / terminal equipment and methods can be implemented in other ways. For example, the apparatus / terminal equipment embodiments described above are only schematic, for example, the division of the modules or units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed each other can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0168] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may also be distributed to multiple network units. Part or all of the units can be selected to achieve the purpose of the embodiment scheme according to actual needs.

[0169] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A method of detecting a mounting position of a device, characterized by, The method comprises the following steps: detecting the transmitting performance and the receiving performance of the OBU model relative to the RRU model in the simulation environment, wherein the simulation environment is generated according to the actual installation parameters of the OBU and the RRU, and the actual installation parameters comprise constant parameters and variable parameters; if the transmitting performance and / or the receiving performance does not meet the preset condition, adjusting the variable parameters in the actual installation parameters, wherein the preset condition is determined according to the constant parameters in the actual installation parameters; if the transmitting performance and the receiving performance both meet the preset condition, determining the current actual installation parameters as the target parameters; wherein the step of detecting the transmitting performance of the OBU model relative to the RRU model comprises the following steps: obtaining the first antenna gain of the RRU model in the direction of the OBU model; calculating the first transmitting power of the OBU model to the RRU model; when the first transmitting power is greater than or equal to the first receiving sensitivity of the RRU model, detecting the transmitting performance according to the first transmitting power and the first antenna gain.

2. The method of detecting a device mounting position according to claim 1, wherein The step of obtaining the first antenna gain of the RRU model in the direction of the OBU model comprises the following steps: calculating the first coordinate of the OBU model relative to the RRU model in the first coordinate system, wherein the first coordinate system is a coordinate system with the position of the RRU model as the origin; calculating the first antenna gain according to the first coordinate.

3. The method of detecting a device mounting position according to claim 1, wherein The transmitting performance comprises the first communication distance of the vehicle at the toll gate and the second communication distance of the vehicle in the free flow environment; The step of detecting the transmitting performance according to the first transmitting power and the first antenna gain when the first transmitting power is greater than or equal to the first receiving sensitivity of the RRU model comprises the following steps: calculating the first communication distance and / or the second communication distance according to the first transmitting power and the first antenna gain when the first transmitting power is greater than or equal to the first receiving sensitivity of the RRU model.

4. The method of detecting a device mounting position according to claim 1, wherein The step of detecting the receiving performance of the OBU model relative to the RRU model comprises the following steps: obtaining the second antenna gain of the OBU model in the direction of the RRU model; calculating the second transmitting power of the RRU model to the OBU model; when the second transmitting power is greater than or equal to the second receiving sensitivity of the OBU model, detecting the receiving performance according to the second transmitting power and the second antenna gain.

5. The method of detecting a device mounting position according to claim 4, wherein The step of obtaining the second antenna gain of the OBU model in the direction of the RRU model comprises the following steps: calculating the second coordinate of the RRU model relative to the OBU model in the second coordinate system, wherein the second coordinate system is a coordinate system with the position of the OBU model as the origin; calculating the second antenna gain according to the second coordinate.

6. The method of detecting a device mounting position according to claim 4, wherein The receiving performance comprises the third communication distance of the vehicle at the toll gate and the fourth communication distance of the vehicle in the free flow environment; when the second transmission power is greater than or equal to the second receiving sensitivity of the vehicle-mounted unit model, detecting the receiving performance according to the second transmission power and the second antenna gain, comprises: when the second transmission power is greater than or equal to the second receiving sensitivity of the vehicle-mounted unit model, calculating the third communication distance and / or the fourth communication distance according to the second transmission power and the second antenna gain.

7. An apparatus for detecting a mounting position of a device, characterized by comprising: comprises: a detecting unit, configured to detect a transmission performance and a receiving performance of a vehicle-mounted unit model of an ETC relative to a road-side unit model of the ETC in a process of movement of a vehicle model in a simulation environment, wherein the simulation environment is generated according to actual installation parameters of the vehicle-mounted unit and the road-side unit, and the actual installation parameters comprise constant parameters and variable parameters; an adjusting unit, configured to adjust a variable parameter in the actual installation parameters if the transmission performance and / or the receiving performance does not meet a preset condition, wherein the preset condition is determined according to the constant parameters in the actual installation parameters; a result unit, configured to determine a current actual installation parameter as a target parameter if both the transmission performance and the receiving performance meet the preset condition; the detecting unit is further configured to: obtain a first antenna gain of the road-side unit model in a direction of the vehicle-mounted unit model; calculate a first transmission power of the vehicle-mounted unit model to the road-side unit model; when the first transmission power is greater than or equal to a first receiving sensitivity of the road-side unit model, detect the transmission performance according to the first transmission power and the first antenna gain.

8. A terminal device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, The processor executes the computer program to realize the method in any one of claims 1 to 6.

9. A computer-readable storage medium storing a computer program, the computer program comprising instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 8. The computer program is executed by the processor to realize the method in any one of claims 1 to 6.

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