Automobile, keyless entry system, capacitance door handle and switch of capacitance door handle
By introducing a transistor switch into the capacitive door handle switch and connecting it to the output pin of the microcontroller, the BCM body domain controller is directly triggered to perform key legal positioning, which solves the problems of long response time and false triggering of existing capacitive door handle switches, realizes a faster unlocking and locking process, and reduces the false triggering rate and power consumption.
Patent Information
- Application Number
- CN202423107820.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-12-16
AI Technical Summary
Existing capacitive door handle switches require filtering and confirmation after being touched by a human hand before triggering the lock or unlock signal, resulting in a long response time and a tendency to be falsely triggered due to environmental changes.
Design a capacitive door handle switch, including first and second touch units, which are connected to the output pin of a microcontroller via a transistor switch to directly trigger the BCM (Body Control Module) to perform key authentication, thereby realizing the parallel operation of capacitive door handle detection and BCM searching for a valid key.
It shortens the response time for unlocking and locking, reduces the chance of accidental triggering, improves the smoothness of use, and reduces vehicle power consumption.
Smart Images
Figure CN223520786U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of electronic circuits, in particular to an automobile, a keyless entry system, a capacitive door handle and a switch thereof. BACKGROUND
[0002] With the continuous development of automobile technology, users have more and more intelligent needs for automobiles, and the demand for keyless entry is becoming more and more common. In the entire keyless entry system, the door handle switch is the first trigger entry, and its application is also becoming more and more popular. Compared with the key switch, the capacitive door handle switch has the advantages of good concealment and not easy to damage, so it is favored by more and more vehicle manufacturers.
[0003] PE unlocking to enter the vehicle is called passive entry. After the user touches the door handle, the door handle switch transmits the unlocking information to the BCM (Body Control Module, vehicle body domain controller). The BCM vehicle body domain controller finds the key through the antenna, and if the key is found, the corresponding unlocking action is performed. The entire unlocking process does not require the user to actively press the key. In order to match the reaction speed of human activities, the keyless unlocking time needs to be controlled within 200ms. Among them, the time of the keyless unlocking process mainly concentrates on the time of the capacitive door handle detection trigger, the time of the BCM vehicle body domain controller searching for a legal key, and the time of the BCM vehicle body domain controller driving unlocking.
[0004] At present, most capacitive door handle switches mainly have two touch units for unlocking and locking, and each touch unit corresponds to a touch surface of one capacitive plate. After the hand touches, the capacitive door handle must be filtered for a certain time, and then the locking signal or the unlocking signal is triggered to be transmitted to the BCM vehicle body domain controller. The BCM vehicle body domain controller confirms whether the key position is legal, and performs the corresponding unlocking action or locking action according to the confirmation result. The entire unlocking and locking process has a long response time. CONTENT OF THE UTILITY MODEL
[0005] To this end, the present application provides an automobile, a keyless entry system, a capacitive door handle and a switch thereof, which can directly trigger the BCM vehicle body domain controller to execute key legal positioning after the hand touches the capacitive door handle, and the BCM vehicle body domain controller searches for a legal key in parallel with the capacitive door handle detection trigger, so as to solve the problem that in the existing capacitive door handle switch, after the hand touches, the capacitive door handle must be filtered for a certain time, and then the locking signal or the unlocking signal is triggered to be transmitted to the BCM vehicle body domain controller. The BCM vehicle body domain controller confirms whether the key position is legal, and performs the corresponding unlocking action or locking action according to the confirmation result. The entire unlocking and locking process has a long response time.
[0006] To achieve the above object, the embodiments of the present application provide the following technical solutions:
[0007] The first aspect of the present application discloses a capacitive door handle switch, comprising: a first touch unit, a second touch unit and a capacitive switch controller;
[0008] The first touch unit is provided with at least one capacitive plate, and the capacitive plate of the first touch unit is connected to an input pin of a microcontroller of the capacitive switch controller;
[0009] The capacitive plate of the second touch unit is connected to an input pin of the microcontroller and an external power supply through a triode switch;
[0010] The triode switch is connected to an output pin of the microcontroller and is controlled by the microcontroller;
[0011] When the input pin of the microcontroller connected to the capacitive plate of the second touch unit has a voltage jump, the capacitive switch controller outputs a handle touch signal, and the microcontroller controls the triode switch to switch from a conducting state to a disconnected state, and the handle touch signal is used to trigger the vehicle body domain controller to perform key legal positioning.
[0012] Optionally, in the capacitive door handle switch, the capacitive plate of the second touch unit is connected to an input pin of a microcontroller of the capacitive switch controller, comprising:
[0013] The capacitive plate of the second touch unit is connected to an input pin of a microcontroller of the capacitive switch controller through a current-limiting resistor.
[0014] Optionally, in the capacitive door handle switch, the number of capacitive plates of the first touch unit is 2.
[0015] Optionally, in the capacitive door handle switch, each capacitive plate of the first touch unit is connected to an input pin of a microcontroller of the capacitive switch controller through a corresponding current-limiting resistor.
[0016] Optionally, in the capacitive door handle switch, the input pin of the microcontroller and the output pin of the microcontroller are pin pins.
[0017] The second aspect of the present application discloses a keyless entry system, comprising: a vehicle body domain controller, a key, a door lock, a radio frequency receiver controller and the capacitive door handle switch disclosed in any one of the first aspect;
[0018] The vehicle body domain controller is connected to the capacitive door handle switch, the key, the door lock and the radio frequency receiver controller, respectively;
[0019] The radio frequency receiver controller is also connected to the key.
[0020] Optionally, in the keyless entry system, further comprising: a keyless entry and start system controller, the radio frequency receiver controller is connected to the BCM body domain controller through the keyless entry and start system controller.
[0021] And / or, a low frequency antenna, the BCM body domain controller is connected to the key through the low frequency antenna.
[0022] The third aspect of the present application discloses a capacitive door handle, comprising: a door handle upper shell, a door handle lower shell, a capacitive switch circuit board, and a capacitive door handle switch according to any one of the first aspect.
[0023] The circuit of the capacitive door handle switch is arranged on the capacitive switch circuit board, the touch surface of the capacitive plate in the first touch unit of the capacitive door handle switch is arranged on the door handle upper shell, and the touch surface of the capacitive plate in the second touch unit of the capacitive door handle switch is arranged on the door handle lower shell.
[0024] Optionally, in the capacitive door handle, the door handle upper shell and the door handle lower shell are connected through snap-in nesting.
[0025] The fourth aspect of the present application discloses an automobile, wherein the automobile is provided with a keyless entry system according to any one of the second aspect, and / or at least one door of the automobile is provided with a capacitive door handle according to any one of the third aspect.
[0026] The capacitive door handle switch provided by the application comprises a first touch unit, a second touch unit and a capacitive switch controller. The first touch unit is provided with at least one capacitive pole plate, the capacitive pole plate of the first touch unit is connected to an input pin of a microcontroller of the capacitive switch controller, the capacitive pole plate of the second touch unit is connected to an input pin of the microcontroller and connected to an external power supply through a triode switch, the triode switch is connected to an output pin of the microcontroller and controlled by the microcontroller, when the input pin of the microcontroller connected to the capacitive pole plate of the second touch unit has a voltage jump, the capacitive switch controller outputs a handle touch signal, the microcontroller controls the triode switch to switch from a conduction state to a disconnection state, and the handle touch signal is used to trigger the BCM vehicle body area controller to perform key legal positioning. The BCM vehicle body area controller searches for a legal key in parallel with the capacitive door handle detection trigger, so as to solve the problem that the existing capacitive door handle switch must be filtered for a certain time after a hand touches the capacitive door handle, and then a locking signal or an unlocking signal is transmitted to the BCM vehicle body area controller, the BCM vehicle body area controller confirms whether the key position is legal, and corresponding unlocking action or locking action is performed according to the confirmation result. The whole unlocking and locking process has a long response time. BRIEF DESCRIPTION OF DRAWINGS
[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.
[0028] Figure 1 A software logic diagram of an existing capacitive switch controller provided by the embodiments of the present application;
[0029] Figure 2 A hardware structure schematic diagram of an existing second touch unit provided by the embodiments of the present application;
[0030] Figure 3 A structure schematic diagram of a capacitive door handle switch provided by the embodiments of the present application;
[0031] Figure 4 A hardware structure schematic diagram of a second touch unit provided by the embodiments of the present application;
[0032] Figure 5 And Figure 6 Hardware structure schematic diagrams of two first touch units provided by the embodiments of the present application;
[0033] Figure 7A structure schematic diagram of a keyless entry system provided for an embodiment of the present application;
[0034] Figure 8 A handle touch signal generation flowchart provided for an embodiment of the present application;
[0035] Figure 9 An unlock flowchart of a capacitive door handle switch provided for an embodiment of the present application;
[0036] Figure 10 An exploded view of a capacitive door handle provided for an embodiment of the present application. DETAILED DESCRIPTION
[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.
[0038] First of all, it needs to be pointed out that the existing capacitive door handle detection trigger time is about 50 ms, the BCM vehicle body domain controller searching for a legal key time is about 100 ms, and the BCM vehicle body domain controller driving unlocking time is 50 ms-100 ms. The existing capacitive switch controller can output 1 and output 2 to the BCM vehicle body domain controller according to the touch situation of the touch surface of the capacitive plate in different touch units; output 1 represents triggering an unlock instruction, and output 2 represents triggering a lock instruction; the software logic of the existing capacitive switch controller is as follows Figure 1 , and the hardware structure schematic diagram of the second touch unit is as follows Figure 2 After starting the software logic program, 10 ms period is used to find out whether a touch event occurs on the touch surface of the capacitive plate in the second touch unit, if it occurs, multiple filtering confirmations are performed, if the filtering number is reached, it is considered that an unlock instruction is triggered, and the unlocking information is transmitted to the BCM vehicle body domain controller by pulling down output 1, and the BCM vehicle body domain controller performs subsequent key searching and unlocking operations. The filtering time after the hand touches the capacitive door handle is 30 ms-50 ms, and the filtering process and the BCM vehicle body domain controller searching for a legal key are serial, which is one of the reasons for the long response time of the unlocking process.
[0039] To address this issue, this application provides a capacitive door handle switch that directly triggers the Body Control Module (BCM) to perform key authentication after a human touches the capacitive door handle. This parallels the BCM's search for a valid key with the capacitive door handle detection, solving the problem of long response times in existing capacitive door handle switches where the door handle must first filter for a certain period after a human touch before triggering a lock or unlock signal to the BCM. The BCM then verifies the key's position and performs the corresponding unlocking or locking action based on the verification result.
[0040] Please see Figure 3 The capacitive door handle switch mainly includes: a first touch unit ( Figure 3 101 in the middle), the second touch unit ( Figure 3 103 in the middle) and capacitor switch controller ( Figure 3 102 in the middle).
[0041] like Figure 5 and Figure 6 As shown, the first touch unit is provided with at least one capacitor plate. Figure 5 and Figure 6 In 1031), the capacitor plate of the first touch unit is connected to the microcontroller of the capacitor switch controller. Figure 5 and Figure 6 The input pin of 1021 (in the middle) Figure 5 and Figure 6 (The input pin in the text). Figure 5 This illustrates a scenario where the first touch unit is equipped with a capacitor plate. Figure 6 The first touch unit is shown to have two capacitor plates.
[0042] In some embodiments, the number of capacitor plates in the first touch unit is 2, that is... Figure 6 As shown. In practical applications, each capacitor plate of the first touch unit is connected to a corresponding current-limiting resistor ( Figure 5 and Figure 6 (1032) is connected to the input pin of the microcontroller of the capacitor switch controller.
[0043] like Figure 4 As shown, the capacitor plates of the second touch unit ( Figure 4 The microcontroller (1011 in the middle) is connected to the capacitor switch controller. Figure 4 The input pin of 1021 (in the middle) Figure 4 The input pin in the middle), and through the transistor switch ( Figure 4 (1012) is connected to an external power supply; the transistor switch is connected to the output pin of the microcontroller ( Figure 4The output pin of the microcontroller is connected to the output pin of the capacitor switch controller, and is controlled by the microcontroller.
[0044] When the voltage of the input pin of the microcontroller connected to the capacitor plate of the second touch unit jumps, the capacitor switch controller outputs a handle touch signal, the microcontroller controls the triode switch to switch from the on state to the off state, and the handle touch signal is used to trigger the BCM body domain controller to perform key legal positioning.
[0045] As shown in Figure 7 , the capacitor switch controller is connected to the BCM body domain controller in the keyless entry system, and the capacitor switch controller outputs 1 and output 2 to the BCM body domain controller according to the touch condition of the touch surface of the capacitor plate in different touch units. Touch area 1 in the figure represents the touch surface of the capacitor plate in the first touch unit, and touch area 2 in the figure represents the touch surface of the capacitor plate in the second touch unit. After the voltage of the input pin of the microcontroller connected to the capacitor plate of the second touch unit jumps, the capacitor switch controller can deliver a handle touch signal to the BCM body domain controller.
[0046] In comparison Figure 2 and Figure 4 , compared with the existing capacitor door handle switch, in addition to being connected to the input pin of the microcontroller of the capacitor switch controller, the capacitor plate of the second touch unit is also connected to the external power supply through the triode switch. When the triode switch is in the on state, the external power supply is used to provide a pull-up voltage.
[0047] The input pin of the microcontroller can be provided with a digital quantity capture module and a capacitive touch module; in the initial state, that is, the untriggered state, the digital quantity capture module of the input pin of the microcontroller can be enabled, and the triode switch can be controlled by the output pin of the microcontroller to be in the on state, so that the external power supply can provide a pull-up voltage for the capacitor plate of the second touch unit; when someone touches the touch surface of the capacitor plate of the second touch unit, due to the human touch, the capacitance of the capacitor plate of the second touch unit will change, thereby causing the voltage of the input pin of the microcontroller connected to the capacitor plate of the second touch unit to jump. At this time, the digital quantity capture module will immediately generate a voltage jump interrupt and deliver it to the microcontroller, and the microcontroller can pull down output 1 to deliver a handle touch signal to the BCM body domain controller after obtaining the interrupt time. The corresponding flowchart can be as shown in Figure 8 , the whole process takes less than 5ms, and the BCM body domain controller starts to perform the key legal positioning process after receiving the handle touch signal. At this time, the microcontroller can control the triode switch to switch from the on state to the off state, turn off the pull-up voltage of the capacitor plate of the second touch unit, and enable the capacitive touch module of the input pin of the microcontroller to perform the subsequent trigger judgment process.
[0048] It should be noted that in actual application, time problem needs to be considered only when unlocking, and therefore the present application can distinguish between human touching the handle and normal triggering of unlocking, and when human hand touches the handle, the handle touch signal is transmitted to the BCM body domain controller through the capacitive switch controller to enable the BCM body domain controller to start the legal key positioning process; at the same time, the capacitive door handle performs filtering judgment of the unlocking triggering logic, so that the process of capacitive door handle detection triggering and the process of BCM body domain controller searching for legal key are changed from serial to parallel, so as to shorten the response time of the unlocking process.
[0049] In actual application, the input pin and the output pin of the microcontroller can be Pin pins, as shown in Figure 4 , Figure 5 , Figure 6 illustrated; of course, it is not limited to this, but can be determined according to the application environment and user needs, and the present application is not limited, and all are within the protection scope of the present application.
[0050] In some embodiments, as also shown in Figure 4 , the capacitive plate of the second touch unit is connected to the input pin of the microcontroller of the capacitive switch controller, and specifically can be: the capacitive plate of the second touch unit is connected to the input pin of the microcontroller of the capacitive switch controller through the current limiting resistor (1013) in Figure 4 .
[0051] The inventor found that the two touch units of the unlocking and locking of most capacitive door handle switches at present are capacitive switches, and the capacitive change caused by human hand touching and the capacitive change caused by other environment (such as rain, leaves, other sticky objects) are difficult to distinguish, and a large number of different environment calibration is needed, but no matter how calibrated, it is impossible to completely avoid the false triggering caused by the environment. False triggering of the capacitive door handle will cause the BCM body domain controller to be awakened, so as to possibly awaken the whole vehicle network, and if multiple false triggering occurs, a large amount of vehicle power will be consumed, and in severe cases, the vehicle will be out of power.
[0052] For this, in some embodiments of the present application, when the first touch unit is provided with only one capacitive plate, that is, the case as shown in Figure 5 , the unlocking logic of the capacitive door handle switch can include: touching the touch surface of the capacitive plate of the second touch unit and the touch surface of the capacitive plate of the first touch unit in turn, and the locking logic of the capacitive door handle switch can include: intermittent touching the touch surface of the capacitive plate of the first touch unit twice in succession. When the first touch unit is provided with two capacitive plates, that is, the case as shown in Figure 6In the case shown, the unlocking logic of the capacitive door handle switch can include successively touching the touch surface of the capacitive plate of the second touch unit and the touch surface of at least one capacitive plate in the first touch unit, and the locking logic of the capacitive door handle switch can include successively touching the touch surfaces of two capacitive plates in the first touch unit.
[0053] It can be understood that the capacitive door handle switch of the present application can only successfully trigger the unlocking logic by first touching the touch surface of the capacitive plate in the second touch unit of the capacitive door handle switch and then touching the touch surface of the capacitive plate in the first touch unit of the capacitive door handle switch, and can trigger the locking logic by successively touching the touch surfaces of two capacitive plates in the first touch unit of the capacitive door handle switch or successively touching the touch surfaces of two capacitive plates in the first touch unit, and such unlocking trigger logic and locking trigger logic are almost impossible to be triggered by the natural environment, which can greatly reduce the probability of false triggering of the capacitive door handle switch.
[0054] In specific application, when the first touch unit is provided with only one capacitive plate, the unlocking process of the capacitive door handle switch can be as shown in Figure 9 If the unlocking trigger condition is met, the output 1 and output 2 of the capacitive switch controller are simultaneously pulled low to transmit an unlocking signal to the BCM body domain controller, and the BCM body domain controller performs subsequent unlocking operation after receiving the unlocking signal.
[0055] In addition, compared with the prior art which only unlocks by touching the touch surface of the capacitive plate in the second touch unit and locks by touching the touch surface of the capacitive plate in the first touch unit, since the touch surface of the capacitive plate in the first touch unit is the force point of the thumb when the handle is held, according to the prior art, the user often unconsciously avoids the touch surface of the capacitive plate in the first touch unit when unlocking the door, thereby causing a sense of awkwardness in use, and the unlocking logic of the present application which successively touches the touch surface of the capacitive plate in the second touch unit and the touch surface of the capacitive plate in the first touch unit can hold the touch surface of the capacitive plate in the second touch unit with four fingers, and the touch surface of the capacitive plate in the first touch unit is the correct unlocking logic, which conforms to the habit of human beings to unlock.
[0056] Based on the above principle, the capacitive door handle switch provided by the embodiment comprises: a first touch unit, a second touch unit and a capacitive switch controller; the first touch unit is provided with at least one capacitive plate, the capacitive plate of the first touch unit is connected to an input pin of a microcontroller of the capacitive switch controller; the capacitive plate of the second touch unit is connected to an input pin of the microcontroller of the capacitive switch controller and an external power supply through a triode switch; the triode switch is connected to an output pin of the microcontroller and is controlled by the microcontroller; when the input pin of the microcontroller connected to the capacitive plate of the second touch unit has a voltage jump, the capacitive switch controller outputs a handle touch signal; the microcontroller controls the triode switch to switch from a conduction state to a disconnection state; the handle touch signal is used to trigger the BCM body area controller to perform key legal positioning; the BCM body area controller searches for a legal key in parallel with the capacitive door handle detection trigger; the problem that the existing capacitive door handle switch must be filtered for a certain time after a hand touches the capacitive door handle, and then a locking signal or an unlocking signal is transmitted to the BCM body area controller, the BCM body area controller confirms whether the key position is legal, and corresponding unlocking action or locking action is performed according to the confirmation result, and the whole unlocking and locking process has a long response time is solved.
[0057] Furthermore, the application can effectively reduce the trigger time of keyless entry, thereby improving the fluency of the whole unlocking and door opening process; in addition, the consumption of vehicle power caused by the false trigger of the capacitive switch is greatly reduced; finally, the unlocking trigger logic in the application is more suitable for the normal hand holding posture of a human being when pulling a door.
[0058] On the basis of the capacitive door handle switch provided in the above embodiment, optionally, another embodiment of the application further provides a keyless entry system, as shown in Figure 7 The keyless entry system comprises: a BCM body area controller, a key, a door lock, a radio frequency receiver (RFR) controller and a capacitive door handle switch as described in any one of the above embodiments.
[0059] The BCM body area controller is connected to the capacitive door handle switch, the key, the door lock and the radio frequency receiver controller respectively; the radio frequency receiver controller is further connected to the key.
[0060] In actual application, the BCM body area controller can be connected to the door lock through a hard wire; the door lock is a mechanical door lock of a vehicle, which can be unlocked by the keyless entry system or a mechanical key.
[0061] In some embodiments, the keyless entry system can further comprise a low frequency antenna, and the BCM body domain controller can connect the key through the low frequency antenna. In some embodiments, the low frequency antenna can connect the BCM body domain controller through a hardwire.
[0062] In some embodiments, the keyless entry system can further comprise a PEPS (Passive Entry Passive Start) controller, and the radio frequency receiver controller can connect the BCM body domain controller through the PEPS controller.
[0063] It should be noted that the PEPS controller in the keyless entry system can be a separate device or can be integrated into the BCM body domain controller, depending on the application environment and user needs, which are within the scope of the present application.
[0064] It should be further noted that the radio frequency receiver controller and the PEPS controller can be connected through can or lin communication, and the BCM body domain controller and the PEPS controller can also be connected through can or lin communication.
[0065] In practical applications, in the keyless entry system, the capacitance switch controller in the capacitive door handle switch is connected to the BCM body domain controller. The capacitance switch controller outputs 1 and output 2 to the BCM body domain controller according to the touch condition of the touch surface of the capacitance plate in different touch units, Figure 7 Touch area 1 in the above formula represents the touch surface of the capacitance plate in the first touch unit, Figure 7 Touch area 2 in the above formula represents the touch surface of the capacitance plate in the second touch unit.
[0066] When the input pin of the microcontroller connected to the capacitance plate of the first touch unit and the capacitance plate of the second touch unit has a voltage jump, the capacitance switch controller can transmit a handle touch signal to the BCM body domain controller. Upon receiving the handle touch signal, the BCM body domain controller can send a low frequency signal (such as 125 KHz) through the low frequency antenna. If the key is within the legal range, it will receive the low frequency signal and generate a high frequency signal (such as 443 MHz). The radio frequency receiver controller receives the high frequency signal sent by the key and judges whether the key is matched, and sends the matching result to the BCM body domain controller, so that the BCM body domain controller completes the key legal positioning and realizes the unlocking.
[0067] When a voltage jump occurs at the input pin of the microcontroller connected to the capacitor plate of the first touch unit, the capacitor switch controller can transmit the handle touch signal to the BCM body domain controller. Upon receiving the handle touch signal, the BCM body domain controller can identify the handle touch signal and trigger the locking logic to achieve locking.
[0068] It should be noted that the relevant descriptions of the capacitive door handle switch can be found in the corresponding embodiments described above, and will not be repeated here; the relevant descriptions of the keyless entry system can also be found in the prior art, and will not be repeated here either.
[0069] Based on the capacitive door handle switch provided in the above embodiments, alternatively, another embodiment of this application also provides a capacitive door handle, such as... Figure 10 As shown, the capacitive door handle mainly includes: an upper housing for the door handle ( Figure 10 1) Lower housing of door handle ( Figure 10 6) Capacitor switch circuit board ( Figure 10 2) and the capacitive door handle switch described in any of the above embodiments;
[0070] The circuit of the capacitive door handle switch is set on the capacitive switch circuit board, and the capacitor plate in the first touch unit of the capacitive door handle switch ( Figure 10 3) of the touch surface ( Figure 10 7) The capacitor plate in the second touch unit of the capacitive door handle switch is located on the upper housing of the door handle. Figure 10 4) of the touch surface ( Figure 10 8) is located on the lower housing of the door handle.
[0071] In practical applications, the circuit of a capacitive door handle switch includes, but is not limited to, the capacitor plate and current-limiting resistor of the first touch unit, the capacitor plate, current-limiting resistor, and transistor switch of the second touch area; the specific details can be determined according to the application environment and user requirements, and all are within the protection scope of this application.
[0072] In some embodiments, the same applies. Figure 10 As shown, the upper housing and the lower housing of the door handle are connected by a snap-fit nesting connection; of course, it is not limited to this, and can be determined according to the application environment and user needs. No matter what method is used, it is within the protection scope of this application.
[0073] It should be noted that, Figure 10 The number 5 indicates the finished product of the capacitor door handle switch.
[0074] In the embodiment, since the capacitive door handle switch can directly trigger the BCM vehicle body domain controller to perform key legal positioning after a human hand touches the capacitive door handle, the BCM vehicle body domain controller searches for a legal key in parallel with the capacitive door handle detection trigger, and the unlocking logic of the capacitive door handle switch is that the touch surface of the capacitive plate in the second touch unit is touched first and then the touch surface of the capacitive plate in the first touch unit, and the locking logic of the capacitive door handle switch is that the touch surface of the capacitive plate in the first touch unit is intermittently touched twice in succession, which is more suitable for the normal hand holding posture of a human being when opening a door, and therefore the capacitive door handle with the above-mentioned capacitive door handle switch structure also has the same advantages in actual application.
[0075] It should be noted that the related description of the capacitive door handle switch can be referred to the above-mentioned corresponding embodiments, which will not be described herein again. The related description of the capacitive door handle can also be referred to the prior art, and the present application will not be described herein again.
[0076] On the basis of the capacitive door handle and the keyless entry system provided in the above-mentioned embodiments, optionally, another embodiment of the present application further provides an automobile, at least one door of the automobile is provided with the capacitive door handle according to any one of the above-mentioned embodiments, and / or the automobile is provided with the keyless entry system according to any one of the above-mentioned embodiments.
[0077] In some embodiments, the number of doors of the automobile can be 4, of course, but is not limited to this, and can be determined according to the application environment and user demand, which is not limited in the present application and is within the protection scope of the present application.
[0078] In some embodiments, the automobile can be a new energy automobile or a fuel automobile, of course, but is not limited to this, and can be other types of existing automobiles, which are within the protection scope of the present application.
[0079] In the embodiment, the automobile with the capacitive door handle having the advantages that the BCM vehicle body domain controller is directly triggered to perform key legal positioning after a human hand touches the capacitive door handle, the BCM vehicle body domain controller searches for a legal key in parallel with the capacitive door handle detection trigger, and the unlocking logic of the capacitive door handle switch is that the touch surface of the capacitive plate in the second touch unit is touched first and then the touch surface of the capacitive plate in the first touch unit, and the locking logic of the capacitive door handle switch is that the touch surface of the capacitive plate in the first touch unit is intermittently touched twice in succession, which is more suitable for the normal hand holding posture of a human being when opening a door, can effectively reduce the trigger time of the keyless entry of the automobile, and improve the fluency of the whole unlocking and door opening in the actual application process. In addition, the consumption of the vehicle power caused by the false trigger of the capacitive switch is also greatly reduced.
[0080] It should be noted that the above-mentioned description of the capacitive door handle switch and the keyless entry system can refer to the corresponding embodiments described above, and will not be repeated here. The description of the automobile can also refer to the prior art, and will not be repeated here.
[0081] The features described in each of the embodiments in the specification can be replaced or combined with each other, and the same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the difference from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, it is described more simply, and the relevant part can refer to the part of the method embodiment. The above-described system and system embodiment are only illustrative, and the units described as separate components can be or can not be physically separated, and the components displayed as units can be or can not be physical units, that is, they can be located in one place or distributed on multiple network units. According to the actual needs, part or all of the modules can be selected to achieve the purpose of the embodiment. Those skilled in the art can understand and implement without creative labor.
[0082] The skilled person can further realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized in electronic hardware, computer software or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been described in the above description. Whether the functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled persons 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.
[0083] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
[0084] It is also to be noted that, as used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Furthermore, the use of the term "about" in relation to a reference number herein can include ±10% of the reference number unless otherwise stated. Also, the use of the term "if" can include "when" a stated condition is met, and vice versa. Also, the use of the term "including," "containing," or "comprising" or variations thereof are intended to mean "comprising" but not to exclude other elements or steps. Furthermore, the use of the term "a plurality" or "a plurality of" is intended to mean "one or more" but not "two or more."
Claims
1. A capacitive door handle switch, characterized in that The capacitive door handle switch comprises: a first touch unit, a second touch unit and a capacitive switch controller; the first touch unit is provided with at least one capacitive plate, and the capacitive plate of the first touch unit is connected to an input pin of a microcontroller of the capacitive switch controller; the capacitive plate of the second touch unit is connected to an input pin of the microcontroller and an external power supply through a triode switch; the triode switch is connected to an output pin of the microcontroller and is controlled by the microcontroller; when the input pin of the microcontroller connected to the capacitive plate of the second touch unit has a voltage jump, the capacitive switch controller outputs a handle touch signal, the microcontroller controls the triode switch to switch from a conducting state to a disconnected state, and the handle touch signal is used to trigger the vehicle body area controller to perform key legal positioning.
2. The capacitive door handle switch according to claim 1, characterized in that The capacitive plate of the second touch unit is connected to an input pin of a microcontroller of the capacitive switch controller, comprising: The capacitive plate of the second touch unit is connected to an input pin of a microcontroller of the capacitive switch controller through a current-limiting resistor.
3. The capacitive door handle switch of claim 1, wherein The number of capacitive plates of the first touch unit is 2.
4. The capacitive door handle switch according to claim 3, characterized in that Each capacitive plate of the first touch unit is connected to an input pin of a microcontroller of the capacitive switch controller through a corresponding current-limiting resistor.
5. Capacitive door handle switch according to any of claims 1-4, characterized in that The input pin of the microcontroller and the output pin of the microcontroller are pin pins.
6. A keyless entry system characterized by comprising: The capacitive door handle switch comprises: a vehicle body area controller, a key, a door lock, a radio frequency receiver controller and the capacitive door handle switch according to any one of claims 1-5; the vehicle body area controller is connected to the capacitive door handle switch, the key, the door lock and the radio frequency receiver controller respectively; the radio frequency receiver controller is further connected to the key.
7. The keyless entry system of claim 6, wherein The capacitive door handle switch further comprises: a keyless entry and start system controller, the radio frequency receiver controller is connected to the vehicle body area controller through the keyless entry and start system controller; and / or, a low-frequency antenna, the vehicle body area controller is connected to the key through the low-frequency antenna.
8. A capacitive door handle, characterized in that The capacitive door handle switch comprises: a door handle upper shell, a door handle lower shell, a capacitive switch circuit board and the capacitive door handle switch according to any one of claims 1-5; the circuit of the capacitive door handle switch is arranged on the capacitive switch circuit board, the touch surface of the capacitive plate in the first touch unit of the capacitive door handle switch is arranged on the door handle upper shell, and the touch surface of the capacitive plate in the second touch unit of the capacitive door handle switch is arranged on the door handle lower shell.
9. Capacitive door handle according to claim 8, characterized in that The door handle upper shell and the door handle lower shell are connected through snap-in nesting.
10. An automobile characterized by comprising: The capacitive door handle switch comprises: the automobile is provided with the keyless entry system according to claim 6 or 7, and / or at least one door of the automobile is provided with the capacitive door handle according to claim 8 or 9.