Detection device and detection method thereof, door handle and vehicle

Abstract

The invention provides a detection device and a detection method thereof, a door handle and a vehicle, and relates to the technical field of ultrasonic sensors. The detection device is applied to the door handle, the door handle comprises a handle body, a groove structure is formed in the side, facing an installation object of the handle body, of the handle body, the detection device comprises a sensor module, the sensor module is used for being installed on the side, in the length direction, of the groove structure, and the signal receiving and transmitting end of the sensor module faces the other side, in the length direction, of the groove structure; and the processor is configured to emit the ultrasonic signal, obtain an echo signal returned by the ultrasonic signal and determine whether the door handle has an obstacle based on the echo signal. Whether the barrier exists in the door handle is detected in an ultrasonic mode, and the detection rate and reliability of whether the barrier exists in the door handle are greatly improved and improved.

Description

Technical Field

[0001] The present application relates to the technical field of ultrasonic sensors. Specifically, the present application relates to a detection device and a detection method thereof, a door handle, and a vehicle. Background Art

[0002] At present, some door handles need to detect whether there are obstacles, such as hidden door handles. Commonly used door handles determine whether there are obstacles in the following two ways: Method 1: The presence of an object is sensed through physical contact between the mechanism and the object. However, this method has the disadvantages of low sensitivity and poor resolution during contact, which results in a low detection rate and reliability of the door handle detecting whether there is an obstacle.

[0003] Method 2: Use commonly used capacitive sensors to detect whether there are obstacles. However, when there are impurities such as oil, water, and dirt, the capacitance value will be affected, resulting in false alarms due to capacitance changes, which will also lead to low detection rate and reliability of detecting whether there are obstacles on the door handle.

[0004] Therefore, there is an urgent need for a new method of detecting door handle obstacles to enhance and improve the detection rate and reliability of whether there are obstacles on the door handle. Summary of the invention

[0005] The present application proposes a detection device and a detection method thereof, a door handle, and a vehicle, so as to solve the technical problems of low detection rate and reliability of whether there is an obstacle on the door handle existing in the related art.

[0006] In a first aspect, an embodiment of the present application provides a detection device, which is applied to a door handle. The door handle includes a handle body, and a side of the handle body facing the installation object has a groove structure. The detection device includes: The sensor module is used to be installed on one side of the groove structure in the length direction with the signal receiving and transmitting end of the sensor module facing the other side of the groove structure in the length direction. It is configured to transmit an ultrasonic signal and obtain an echo signal returned by the ultrasonic signal, and determine whether there is an obstacle on the door handle based on the echo signal.

[0007] In a possible implementation, the sensor module is specifically configured to: determine an echo waveform based on the echo signal, and determine whether there is an obstacle on the door handle based on the echo waveform.

[0008] In a possible implementation, the sensor module is specifically configured to: determine that there is an obstacle on the door handle if the echo waveform meets a predetermined condition; Among them, satisfying the predetermined condition includes at least one of the following: the echo waveform is different from the preset initial waveform, the amplitude of the echo waveform is not within the predetermined amplitude range, and the duration of the echo waveform exceeds the predetermined time.

[0009] In a possible implementation, the detection device further includes at least one of the following: The sensor module is also configured to send first target information to the controller when determining that there is an obstacle on the door handle, so that the controller controls the motor to stop rotating or rotate in the reverse direction based on the first target information; The frequency range of the ultrasonic signal is not less than 200 kHz and not more than 400 kHz.

[0010] In a second aspect, an embodiment of the present application provides a door handle, comprising: a handle body and the detection device of the first aspect; The sensor module of the detection device is installed on one side of the length direction of the groove structure and the signal transceiver end of the sensor module faces the other side of the length direction of the groove structure.

[0011] In a possible implementation, the door handle includes: a first groove is formed on one side of the groove structure in the length direction; The sensor module is installed in the first groove.

[0012] In one possible implementation, a door handle includes: a handle body movably connected to a mounting object; When the handle body is in the first position, the handle body is exposed from the installation object; when the handle body is in the second position, the handle body is completely received in the receiving groove of the installation object.

[0013] In a third aspect, an embodiment of the present application provides a vehicle, comprising: a vehicle body, a controller, a motor, and the door handle of the second aspect; The controller and the motor are arranged in the vehicle body, the door handle is installed on the door of the vehicle body, and the door has a receiving groove matching the door handle; The controller is used to control the motor to rotate so as to drive the door handle to be exposed from the vehicle body or to be accommodated in the accommodation groove of the vehicle body.

[0014] In a fourth aspect, an embodiment of the present application provides a detection method, which is applied to the detection device of the first aspect, including: Transmitting an ultrasonic signal and acquiring an echo signal returned by the ultrasonic signal; Determine whether there is an obstacle in the door handle based on the echo signal.

[0015] In a possible implementation, determining whether there is an obstacle at the door handle based on the echo signal includes: determining an echo waveform based on the echo signal, and determining whether there is an obstacle at the door handle based on the echo waveform; Determining whether there is an obstacle on the door handle based on the echo waveform includes: if the echo waveform satisfies a predetermined condition, determining that there is an obstacle on the door handle; wherein satisfying the predetermined condition includes at least one of the following: the echo waveform is different from a preset initial waveform, the amplitude of the echo waveform is not within a predetermined amplitude range, and the duration of the echo waveform exceeds a predetermined time; And / or, the detection method further includes: when it is determined that there is an obstacle on the door handle, sending first target information to the controller, so that the controller controls the motor to stop rotating or rotate in the reverse direction based on the first target information.

[0016] The beneficial technical effects brought about by the technical solution provided by the embodiment of the present application include: The sensor module of the embodiment of the present application can be installed on one side of the groove structure in the length direction, and the signal transceiver end of the sensor module faces the other side of the groove structure in the length direction, so that the sensor module can emit ultrasonic waves in the space between the groove structure and the installation object, and then the echo signal returned by the ultrasonic signal can be obtained in the sensor module, and the door handle can be determined based on the echo signal. The embodiment of the present application detects whether there is an obstacle on the door handle by ultrasonic means, avoiding the shortcomings of low sensitivity and poor resolution caused by the direct contact method of the mechanism, and also avoiding the shortcomings of capacitive sensors that are prone to false detection due to impurities on the surface, greatly improving and improving the detection rate and reliability of whether there is an obstacle on the door handle, and can be applied to hidden door handles.

[0017] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which: Figure 1 A schematic diagram of a detection system in which a detection device provided in an embodiment of the present application is applied to a door handle; Figure 2 A schematic diagram of the structure of a sensor module provided in an embodiment of the present application transmitting an ultrasonic signal to a handle space; Figure 3 A schematic diagram of an echo waveform when there are no obstacles provided in an embodiment of the present application; Figure 4 A schematic diagram of a first echo waveform when an obstacle exists in the second space provided in an embodiment of the present application; Figure 5 A schematic diagram of a second echo waveform when an obstacle exists in the second space provided in an embodiment of the present application; Figure 6A schematic diagram of an echo waveform when an obstacle exists in the first space provided by an embodiment of the present application; Figure 7 A flowchart of the first detection method provided in the embodiment of the present application; Figure 8 A flowchart of the second detection method provided in an embodiment of the present application. Description of the drawings: 10-Sensor module; 20-Obstacles; 30-handle space, 301-first space, 302-second space; 40-controller; 50-Motor. DETAILED DESCRIPTION

[0020] The embodiments of the present application are described below in conjunction with the drawings in the present application. It should be understood that the implementation methods described below in conjunction with the drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions of the embodiments of the present application.

[0021] It will be understood by those skilled in the art that, unless specifically stated, the "said" and "the" used herein may also include plural forms. It should be further understood that the wording "including" used in the specification of the present application refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the implementation of other features, information, data, steps, operations, elements, components and / or combinations thereof supported by the present technical field. It should be understood that when we say that an element is "connected" or "coupled" to another element, the element may be directly connected or coupled to the other element, or it may refer to the connection relationship between the element and the other element through an intermediate element. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein refers to at least one of the items defined by the term, for example, "A and / or B" may be implemented as "A", or as "B", or as "A and B".

[0022] In the related art, with the development of automobile intelligence, hidden door handles have been introduced to improve the appearance and reduce wind resistance. However, in actual use, the driving mode of hidden door handles has safety hazards, especially when locking, if the user's hand stays on the door handle, it may cause the hand to be pinched, causing personal injury. Therefore, how to improve the safety of hidden door handles of vehicles and avoid the risk of physical injury to users during use is a technical problem that needs to be solved urgently by those skilled in the art.

[0023] Technical defect 1: The commonly used door handle anti-pinch system senses whether there is an object through physical contact between the mechanism and the object. The contact anti-pinch system has the disadvantages of low sensitivity and poor resolution. It cannot identify small objects after contact due to the small feedback signal, resulting in missed judgment, which may cause personal injury, especially for children's fingers.

[0024] Technical defect 2: The anti-pinch function implemented by the commonly used capacitive sensor is based on the principle of the change of the collected capacitance value. This control method is prone to false triggering. When there are impurities such as oil, water, and dirt, the capacitance value will be affected, resulting in a false alarm due to the capacitance change. Capacitive sensors are easily affected by environmental interference due to their capacitive characteristics, and the vehicle operating conditions need to meet the operating environment and operate at extreme temperatures of -40°C or 85°C. Therefore, it is easy for some electromagnetic interference, temperature and humidity changes, high pressure and other environments to cause changes in capacitance and lead to false alarms. Although these scenarios can be solved through some isolation technology, shielding technology, etc., this will increase the cost and technical difficulty of the sensor.

[0025] Therefore, the anti-pinch detection of hidden door handles needs to be improved in terms of detection rate and reliability.

[0026] The detection device and detection method thereof, door handle, and vehicle provided in this application are intended to solve the above technical problems of the prior art.

[0027] The following is a detailed description of the technical solution of the present application and how the technical solution of the present application solves the above technical problems with specific embodiments. It should be noted that the following implementations can refer to, draw on or combine with each other, and the same terms, similar features and similar implementation steps in different implementations will not be described repeatedly.

[0028] See also Figure 1 As shown, an embodiment of the present application provides a schematic diagram of a detection system in which a detection device is applied to a door handle. Figure 1 As shown, the detection system of the embodiment of the present application can be used as an application scenario of the detection device. The detection system includes a detection device, a controller 40 and a motor 50.

[0029] The detection device provided in the embodiment of the present application is applied to a door handle. The door handle includes a handle body, and a groove structure is provided on the side of the handle body facing the installation object.

[0030] The detection device includes a sensor module 10, which is used to be installed on one side of the groove structure in the length direction and the signal transceiver end of the sensor module 10 faces the other side of the groove structure in the length direction. The sensor module 10 is configured to transmit an ultrasonic signal and obtain an echo signal returned by the ultrasonic signal, and determine whether there is an obstacle 20 on the door handle based on the echo signal.

[0031] See also Figure 1 As shown, the handle space 30 is a space formed between the groove structure and the installation object, and the sensor module 10 emits ultrasonic waves in the handle space 30 to detect whether there is an obstacle 20 in the handle space 30. The installation object can be a door on which a door handle is installed, and the door can be used in a vehicle door, a vehicle tailgate, a building gate, or a switch door of other electronic equipment.

[0032] Optionally, the length direction is the direction in which the handle body is horizontally arranged. The echo signal is the signal returned by the ultrasonic signal after encountering an obstacle. Since the signal transceiver end of the sensor module 10 faces the other side of the length direction of the groove structure, the ultrasonic signal will return an echo signal when it encounters the other side of the length direction of the groove structure. If it encounters an additional obstacle 20, it will also return an echo signal. The echo signals with and without the obstacle 20 are definitely different, so it can be determined whether there is an obstacle 20 on the door handle based on the echo signal.

[0033] Alternatively, the obstacle 20 may be a PVC pipe, an adult's finger, or a child's finger.

[0034] The sensor module 10 of the embodiment of the present application can be installed on one side of the groove structure in the length direction with the signal receiving and transmitting end of the sensor module 10 facing the other side of the groove structure in the length direction, so that the sensor module 10 can emit ultrasonic waves in the space between the groove structure and the installation object, and then the echo signal returned by the ultrasonic signal can be obtained in the sensor module 10, and whether there is an obstacle 20 on the door handle can be determined based on the echo signal.

[0035] The embodiment of the present application detects whether there is an obstacle 20 on the door handle by ultrasonic means, avoiding the disadvantages of low sensitivity and poor resolution brought about by the direct contact method of the mechanism, and also avoiding the disadvantage of the capacitive sensor that is prone to false detection due to impurities on the surface. It greatly enhances and improves the detection rate and reliability of whether there is an obstacle 20 on the door handle, and can be applied to hidden door handles.

[0036] In some embodiments, the sensor module 10 is specifically configured to: determine an echo waveform based on the echo signal, and determine whether there is an obstacle 20 on the door handle based on the echo waveform.

[0037] The embodiment of the present application can determine the echo waveform based on the echo signal, and then determine whether there is an obstacle 20 according to the echo waveform. The echo signals returned by different obstacles 20 will be different.

[0038] See also Figure 1As shown, the embodiment of the present application utilizes the sensor module 10 to emit ultrasonic waves in the handle space 30. When there is an obstacle 20, the ultrasonic sound field in the door handle is disturbed, thereby sensing whether there is an obstacle 20 invading the detected space.

[0039] In some embodiments, the sensor module 10 is specifically configured to: determine that there is an obstacle 20 on the door handle if the echo waveform meets a predetermined condition; Among them, satisfying the predetermined condition includes at least one of the following: there is a difference between the echo waveform and the preset initial waveform, the amplitude of the echo waveform is not within the predetermined amplitude range, and the duration of the echo waveform exceeds the predetermined time.

[0040] Optionally, the initial waveform is the echo waveform when there is no obstacle 20 , the predetermined amplitude range is the amplitude range of the echo waveform when there is no obstacle 20 , and the predetermined time is the duration of the echo waveform when there is no obstacle 20 .

[0041] See also Figure 2 As shown, the embodiment of the present application provides a schematic diagram of a structure in which a sensor module 10 transmits an ultrasonic signal to a handle space 30. Figure 2 As shown, the handle space 30 includes a first space 301 and a second space 302, and the first space 301 and the second space 302 are separated by a Figure 2 The vertical line in the figure is used to distinguish. The first space 301 is the near zone, and the second space 302 is the far zone. There is a blind zone in the near zone. The area filled with the slope in the figure is the detection space of the ultrasonic signal, and the area without the slope is the blind zone. The embodiment of the present application mainly determines whether there is an obstacle 20 by the change of the echo waveform.

[0042] See also Figure 3 As shown, the embodiment of the present application provides a schematic diagram of an echo waveform when there is no obstacle 20. Figure 3 As shown, the horizontal axis is time and the vertical axis is amplitude. When there is no obstacle 20, the ultrasonic signal can return when it encounters the inner wall of the groove structure, and the flight time returned on the other side of the length direction of the groove structure is the longest. The echo waveform when there is no obstacle 20 can be used as the initial waveform.

[0043] See also Figure 4 As shown, the embodiment of the present application provides a first schematic diagram of an echo waveform when an obstacle 20 exists in the second space 302. Figure 4 As shown in the figure, of the two echo waveforms, the first one is Figure 3 The echo waveform shown when there is no obstacle 20 is consistent, and can be considered as the waveform returned by the ultrasonic wave encountering the other side of the length direction of the groove structure. The amplitude of the second waveform is lower than that of the first waveform, corresponding to the echo signal returned by encountering the obstacle 20.

[0044] See also Figure 5 As shown, the embodiment of the present application provides a second echo waveform schematic diagram when there is an obstacle 20 in the second space 302. Figure 5 As shown in the figure, of the two echo waveforms, the first one is Figure 3 The echo waveforms shown when there is no obstacle 20 are consistent, and can be considered to be the waveforms returned by the ultrasonic wave when it encounters the other side of the length direction of the groove structure. The amplitude of the second waveform is also lower than that of the first waveform, corresponding to the echo signal returned when encountering the obstacle 20.

[0045] in, Figure 5 and Figure 4 The waveforms in the figure correspond to the echo waveforms of different obstacles 20, all of which are the cases where obstacles 20 appear in the far area. When other obstacles 20 appear, the amplitudes of the waveforms will change due to the different types of obstacles 20. For example, the amplitude of a human hand will be lower, and the amplitude returned by other entities will be higher.

[0046] See also Figure 6 As shown, the embodiment of the present application provides a schematic diagram of an echo waveform when an obstacle 20 exists in the first space 301. Figure 6 The echo waveform shown is similar to Figure 3 The duration of the echo waveform when there is no obstacle 20 is significantly prolonged on the horizontal axis. When measuring an obstacle 20 in the near zone, the ultrasonic sensor will have residual vibration, and the residual vibration will overlap with the original measurement waveform, which will cause the duration of the horizontal axis to increase. If this waveform appears in the comparison process when measuring the obstacle 20, it is judged that the obstacle 20 appears in the near zone.

[0047] In the embodiment of the present application, it is also possible to determine whether an obstacle appears in the far zone or the near zone based on the change in the echo waveform.

[0048] In some embodiments, the detection device further includes at least one of the following: the sensor module 10 is further configured to send first target information to the controller 40 when determining that there is an obstacle 20 on the door handle, so that the controller 40 controls the motor 50 to stop rotating or rotate in the reverse direction based on the first target information; The frequency range of the ultrasonic signal is not less than 200 kHz and not more than 400 kHz.

[0049] Optionally, the sensor module 10 is further configured to send second target information to the controller 40 when it is determined that there is no obstacle 20 on the door handle, so that the controller 40 controls the motor 50 to continue rotating in the current direction based on the second target information.

[0050] Optionally, the first target information may be a high level, and the second target information may be a low level.

[0051] Optionally, the sensor module 10 is also configured to determine the type of obstacle based on the echo waveform when determining that there is an obstacle 20 on the door handle, and send corresponding control information to the controller 40 based on the obstacle type, so that the controller 40 controls the rotation of the motor 50 based on the control information.

[0052] Optionally, the sensor module 10 is specifically configured to match the echo waveform with a first preset waveform set. If the echo waveform matches any first preset waveform in the first preset waveform set, the obstacle type is determined to be a finger, and a first control information is sent to the controller 40, so that the controller 40 controls the motor 50 to stop rotating or rotate in the opposite direction based on the first control information; the first preset waveform set is the echo waveform when the obstacle 20 is a variety of fingers.

[0053] Specifically, the first preset waveform set can be an echo waveform collected based on multiple fingers of multiple people as obstacles 20, so that the obstacle type can be identified as a finger in cases such as adults or children, or different fingers of a person, and then the corresponding control operation can be performed, for example: controlling the motor 50 to rotate in the opposite direction, and the door handle moves toward the side away from the installation object, thereby loosening the door handle to prevent the fingers from being pinched.

[0054] Optionally, the sensor module 10 is specifically configured to match the echo waveform with the first preset waveform set when it is determined that there is an obstacle 20 in the door handle. If the echo waveform does not match all the first preset waveforms in the first preset waveform set, the obstacle type is determined to be other obstacles, and second control information is sent to the controller 40, so that the controller 40 controls the alarm module to issue corresponding alarm prompt information based on the second control information.

[0055] Optionally, the sensor module 10 is specifically configured to match the echo waveform with a second preset waveform set when it is determined that there is an obstacle 20 on the door handle. If the echo waveform matches any second preset waveform in the second preset waveform set, the obstacle type is determined to be other obstacles, and second control information is sent to the controller 40, so that the controller 40 controls the alarm module to issue corresponding alarm prompt information based on the second control information; the second preset waveform set is an echo waveform when the obstacle 20 is a preset physical object other than a finger.

[0056] Specifically, the second preset waveform set can be an echo waveform obtained based on a variety of different physical objects collected as obstacles 20, so that when a physical object that is easily stuck in a door handle in daily life is stuck in a door handle, the obstacle type can be identified as an obstacle other than a finger, and then the corresponding control operation can be performed.

[0057] Optionally, the alarm prompt information can be a buzzer sound or a voice prompt information. The voice prompt information can be a prompt that there is an obstacle 20 on the door handle, so that the user can determine the corresponding execution operation, such as: get off the car to check, release the door handle, stop closing the door handle, or continue closing the door handle, etc.

[0058] The embodiment of the present application can identify different types of obstacles 20, thereby providing different anti-pinch strategies according to different types of obstacles, and the intelligent control of anti-pinch is highly flexible, thereby improving user experience.

[0059] The ultrasonic signal emitted by the sensor module 1 of the embodiment of the present application is high-frequency ultrasound, which uses high-frequency ultrasonic detection with high accuracy and a resolution of millimeter level. It can identify small objects at small angles and can be arranged in the small space of a door handle.

[0060] The detection logic of the embodiment of the present application is to use a high-frequency ultrasonic sensor to detect whether there is a target intrusion in a small space. When there is a target, or even some small targets invading the detection space, the target can be identified through waveform detection comparison algorithm processing.

[0061] Based on the same inventive concept, an embodiment of the present application provides a door handle, including: a handle body and a detection device of an embodiment of the present application.

[0062] The sensor module 10 of the detection device is installed on one side of the length direction of the groove structure and the signal transceiver end of the sensor module 10 faces the other side of the length direction of the groove structure.

[0063] In some embodiments, the door handle includes: a first groove is opened on one side of the groove structure in the length direction; and the sensor module 10 is installed in the first groove.

[0064] In some embodiments, the door handle includes: a handle body movably connected to an installation object; when the handle body is in a first position, the handle body is exposed from the installation object; when the handle body is in a second position, the handle body is completely received in a receiving groove of the installation object.

[0065] The embodiments of the present application relate to the field of ultrasonic sensors, and in particular to a detection method for anti-pinch detection of vehicle-mounted hidden door handles. The invention proposes a new anti-pinch detection scheme to address the defects of contact detection and large blind spots of anti-pinch detection technology for vehicle-mounted hidden door handles.

[0066] The door handle applied to the embodiment of the present application can achieve at least the following technical effects: the sensor module 10 of the embodiment of the present application can be installed on one side of the length direction of the groove structure and the signal receiving and transmitting end of the sensor module 10 faces the other side of the length direction of the groove structure, so that the sensor module 10 can emit ultrasonic waves in the space between the groove structure and the installation object, and then the echo signal returned by the ultrasonic signal can be obtained in the sensor module 10, and whether there is an obstacle 20 in the door handle can be determined based on the echo signal.

[0067] The embodiment of the present application detects whether there is an obstacle 20 on the door handle by ultrasonic means, avoiding the disadvantages of low sensitivity and poor resolution brought about by the direct contact method of the mechanism, and also avoiding the disadvantage of the capacitive sensor that is prone to false detection due to impurities on the surface. It greatly enhances and improves the detection rate and reliability of whether there is an obstacle 20 on the door handle, and can be applied to hidden door handles.

[0068] The door handle provided in the embodiment of the present application includes the detection device of the embodiment of the present application, which has the same inventive concept and the same beneficial effects as the various embodiments described in the previous detection devices. The contents not shown in detail in the door handle can be referred to the various embodiments described in the previous embodiments and will not be repeated here.

[0069] Based on the same inventive concept, an embodiment of the present application provides a vehicle, including: a vehicle body, a controller 40, a motor 50, and a door handle according to an embodiment of the present application; The controller 40 and the motor 50 are arranged in the vehicle body, and the door handle is installed on the door of the vehicle body, and the door has a receiving groove matching the door handle; The controller 40 is used to control the motor 50 to rotate so as to drive the door handle to be exposed from the vehicle body or to be received in the receiving groove of the vehicle body.

[0070] The embodiment of the present application can emit ultrasonic waves in the handle space 30 inside the door handle, use the sound field changes of the ultrasonic waves in the handle space 30 to sense whether there is an obstacle 20, and upload the data to the controller 40 through the automobile bus protocol. The controller 40 controls the motor 50 to stop rotating or rotate in the opposite direction, thereby achieving a contactless anti-pinch detection function.

[0071] The vehicle provided in the embodiment of the present application includes the door handle of the embodiment of the present application, and the door handle is equipped with a detection device, which has the same inventive concept and the same beneficial effects as the various embodiments described in the previous detection devices. The contents not shown in detail in the vehicle can be referred to the various embodiments described in the previous embodiments and will not be repeated here.

[0072] See also Figure 7 As shown, the present application embodiment provides a flow chart of a first detection method. Figure 7 As shown, the detection method is applied to the detection device of the embodiment of the present application, including: steps S701 to S702.

[0073] S701: Transmit an ultrasonic signal and obtain an echo signal returned by the ultrasonic signal.

[0074] The detection method of the embodiment of the present application is executed by the sensor module 10, and the sensor module 10 can emit an ultrasonic signal and obtain an echo signal for signal processing.

[0075] S702: Determine whether there is an obstacle 20 on the door handle based on the echo signal.

[0076] Optionally, step S702 includes: determining an echo waveform based on the echo signal, and determining whether there is an obstacle 20 on the door handle based on the echo waveform.

[0077] Specifically, if there is an obstacle 20 , the echo waveform will be different from the initial waveform without the obstacle 20 , so whether there is an obstacle 20 can be determined based on the echo waveform.

[0078] See also Figure 8 As shown, the present application embodiment provides a flow chart of a second detection method. Figure 8 As shown, the detection method includes: steps S801 to S803.

[0079] S801: Transmit an ultrasonic signal and obtain an echo signal returned by the ultrasonic signal.

[0080] Optionally, the principle of step S801 of the embodiment of the present application is consistent with that of step S701 and will not be repeated here.

[0081] S802, determine the echo waveform based on the echo signal, and determine whether there is an obstacle 20 on the door handle based on the echo waveform.

[0082] Optionally, in the embodiment of the present application, if there is an obstacle 20 , the echo waveform will be different from the echo waveform without the obstacle 20 , so whether there is an obstacle 20 can be determined based on the echo waveform.

[0083] S803. If the echo waveform meets the predetermined condition, it is determined that there is an obstacle 20 on the door handle, and the first target information is sent to the controller 40, so that the controller 40 controls the motor 50 to stop rotating or rotate in the reverse direction based on the first target information.

[0084] Among them, satisfying the predetermined condition includes at least one of the following: the echo waveform is different from the preset initial waveform, the amplitude of the echo waveform is not within the predetermined amplitude range, and the duration of the echo waveform exceeds the predetermined time.

[0085] Optionally, if the echo waveform does not meet the predetermined condition, it is determined that there is no obstacle 20 on the door handle, and the second target information is sent to the controller 40, so that the controller 40 continues to control the motor 50 to rotate in the current direction based on the second target information.

[0086] As an example, the present application also provides a detection method, including: The sensor module 10 is powered on and initialized. The sensor module 10 stores the initial waveform, sends an ultrasonic signal, collects an echo signal, determines an echo waveform based on the echo signal, and compares the echo waveform with the initial waveform.

[0087] If there is a difference between the echo waveform and the initial waveform, the first target information is reported through the LIN bus; if there is a difference between the echo waveform and the initial waveform, the second target information is reported through the LIN bus.

[0088] The controller 40 controls the motor 50 to stop rotating or rotate in the reverse direction based on the first target information, or the controller 40 continues to control the motor 50 to rotate in the current direction based on the second target information.

[0089] The detection method provided in the embodiment of the present application is applied to the detection device in the embodiment of the present application, and has the same inventive concept and the same beneficial effect as the various embodiments described in the previous detection device. The contents not shown in detail in the detection method can be referred to the various embodiments described in the previous description, and will not be repeated here.

[0090] Those skilled in the art will appreciate that the various operations, methods, steps, measures, and schemes in the processes discussed in this application may be alternated, changed, combined, or deleted. Furthermore, other steps, measures, and schemes in the various operations, methods, and processes discussed in this application may also be alternated, changed, rearranged, decomposed, combined, or deleted. Furthermore, steps, measures, and schemes in the related art that are similar to those disclosed in this application may also be alternated, changed, rearranged, decomposed, combined, or deleted.

[0091] In the description of the present application, the directions or positional relationships indicated by words such as "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the exemplary directions or positional relationships shown in the accompanying drawings. They are for the convenience of describing or simplifying the description of the embodiments of the present application, and do not indicate or imply that the referred device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0092] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0093] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0094] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0095] The above is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the technical concept of the scheme of the present application, other similar implementation methods based on the technical ideas of the present application are also within the protection scope of the embodiments of the present application.

Claims

1. A detection device, characterized in that: Applied to a door handle, the door handle comprises a handle body, the handle body has a groove structure on one side facing the installation object, and the detection device comprises: The sensor module is used to be installed on one side of the groove structure in the length direction with the signal receiving and transmitting end of the sensor module facing the other side of the groove structure in the length direction. It is configured to transmit an ultrasonic signal and obtain an echo signal returned by the ultrasonic signal, and determine whether there is an obstacle on the door handle based on the echo signal.

2. The detection device according to claim 1, characterized in that: The sensor module is specifically configured to: determine an echo waveform based on the echo signal, and determine whether there is an obstacle on the door handle based on the echo waveform.

3. The detection device according to claim 2, characterized in that: The sensor module is specifically configured to: determine that there is an obstacle on the door handle if the echo waveform meets a predetermined condition; Among them, satisfying the predetermined condition includes at least one of the following: the echo waveform is different from a preset initial waveform, the amplitude of the echo waveform is not within a predetermined amplitude range, and the duration of the echo waveform exceeds a predetermined time.

4. The detection device according to claim 1, characterized in that: Also includes at least one of the following: The sensor module is further configured to send first target information to the controller when determining that there is an obstacle on the door handle, so that the controller controls the motor to stop rotating or rotate in the reverse direction based on the first target information; The frequency range of the ultrasonic signal is not less than 200 kHz and not more than 400 kHz.

5. A door handle, characterized in that: include: A handle body and a detection device as claimed in any one of claims 1 to 4; The sensor module of the detection device is installed on one side of the length direction of the groove structure, and the signal transceiver end of the sensor module faces the other side of the length direction of the groove structure.

6. The door handle according to claim 5, characterized in that: include: A first groove is formed on one side of the groove structure in the length direction; The sensor module is installed in the first groove.

7. The door handle according to claim 5, characterized in that: include: The handle body is movably connected to the installation object; When the handle body is in the first position, the handle body is exposed from the installation object; when the handle body is in the second position, the handle body is completely received in the receiving groove of the installation object.

8. A vehicle, characterized in that: include: A vehicle body, a controller, a motor, and a door handle as claimed in any one of claims 5 to 7; The controller and the motor are arranged in the vehicle body, the door handle is installed on the door of the vehicle body, and the door has a receiving groove matching the door handle; The controller is used to control the motor to rotate so as to drive the door handle to be exposed from the vehicle body or to be accommodated in the accommodation groove of the vehicle body.

9. A detection method, characterized in that: The detection device as claimed in any one of claims 1 to 4 comprises: Transmitting an ultrasonic signal and acquiring an echo signal returned by the ultrasonic signal; It is determined whether there is an obstacle on the door handle based on the echo signal.

10. The detection method according to claim 9, characterized in that: Determining whether there is an obstacle on the door handle based on the echo signal includes: determining an echo waveform based on the echo signal, and determining whether there is an obstacle on the door handle based on the echo waveform; Determining whether there is an obstacle on the door handle based on the echo waveform includes: if the echo waveform satisfies a predetermined condition, determining that there is an obstacle on the door handle; wherein satisfying the predetermined condition includes at least one of the following: the echo waveform is different from a preset initial waveform, the amplitude of the echo waveform is not within a predetermined amplitude range, and the duration of the echo waveform exceeds a predetermined time; And / or, the detection method further includes: when it is determined that there is an obstacle on the door handle, sending first target information to the controller, so that the controller controls the motor to stop rotating or rotate in the reverse direction based on the first target information.

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