Vehicle key induction area position detection device

Abstract

The utility model discloses an automobile control module testing device, which comprises a shell, a battery, a power supply control module, an antenna module, a main control module and a detection signal prompting module are arranged in the shell, and the main control module is respectively connected with the power supply control module, the antenna module and the detection signal prompting module; keys are arranged on the surface of the shell and are respectively connected with the power supply control module and the main control module; the antenna module is used for detecting a wireless signal of a vehicle key induction area and sending the wireless signal to the main control module; the detection signal prompt module outputs a prompt signal according to the control signal of the main control module, and the prompt signal can indicate the wireless signal intensity sensed by the antenna module; the battery supplies power to the whole device through the power supply control module and the power supply module, and the power supply control module controls on-off of a power supply circuit from the battery to the power supply module according to signals of the keys and power supply control signals of the main control module. According to the utility model, a user can be effectively helped to find the position of a vehicle key sensing area so as to check the failure reason of the sensing key.

Description

Technical Field

[0001] The utility model belongs to the field of vehicle equipment detection, and particularly relates to a device and a method for detecting the position of a vehicle key induction area. Background Art

[0002] Some vehicles are equipped with an automatic induction unlocking system. As long as the vehicle's intelligent key is carried on the owner's body and the intelligent key and the vehicle reach a certain distance, the vehicle will automatically unlock. Similarly, if the owner leaves the vehicle with the intelligent key and reaches a certain distance, the vehicle will also automatically lock. This function can provide great convenience for the vehicle owner and avoid the situation of forgetting to lock the vehicle due to carelessness. The automatic induction unlocking system can be applied to vehicles such as cars, electric bicycles, and motorcycles.

[0003] In specific implementation, a vehicle key induction area is provided outside or inside the cab of the vehicle. A wireless signal generating device is provided in the vehicle key induction area. Correspondingly, a wireless signal receiving and responding device is provided in the intelligent key. When the vehicle owner triggers the vehicle's automatic induction unlocking state, the wireless signal generating device in the vehicle key induction area will start to send a wireless signal. If a response from the intelligent key in the induction area is obtained, the vehicle will automatically unlock. In addition, the vehicle is equipped with a one-key start system. After the vehicle owner presses the one-key start button, the vehicle automatically senses the intelligent key in the cab. After obtaining a response, the vehicle will automatically start.

[0004] However, in actual applications, the situation of the induction key failure may occur. There are various reasons for the induction key failure, including the intelligent key being out of power or damaged, and the vehicle sensor being out of power or damaged. When the induction key fails, the vehicle owner cannot determine which specific reason causes it and it is difficult to carry out subsequent disposal and response, which affects the use of the vehicle. When the intelligent key has low power, since the position of the vehicle induction coil cannot be determined, it is also difficult to perform emergency start by approaching the intelligent key to the induction coil.

[0005] In view of this, a new device and method are needed to solve the above problems. Summary of the Utility Model

[0006] To solve the problems commonly existing in the prior art, the utility model provides a device for detecting the position of a vehicle key induction area, which can passively detect the wireless signal strength of the vehicle key induction area and give a prompt, and can effectively help the user find the position of the vehicle key induction area to check the reasons for the induction key failure.

[0007] The technical solution adopted by the utility model is as follows:

[0008] A vehicle key induction area position detection device, comprising: a housing, wherein a battery, a power supply control module, an antenna module, a main control module and a detection signal prompt module are arranged inside the housing, and the main control module is respectively connected to the power supply control module, the antenna module and the detection signal prompt module; a key is arranged on the surface of the housing, and the key is respectively connected to the power supply control module and the main control module; the antenna module is used for detecting the wireless signal of the vehicle key induction area and sending it to the main control module; the detection signal prompt module outputs a prompt signal according to the control signal of the main control module, and the prompt signal can indicate the intensity of the wireless signal sensed by the antenna module; the battery supplies power to the whole device through the power supply control module and the power module, and the power supply control module controls the on-off of the power supply line from the battery to the power module according to the signal of the key and the power control signal of the main control module.

[0009] Further, the power supply control module includes a first switching tube, a second switching tube, a first resistor, a second resistor, a third resistor, a first diode, a second diode and a first capacitor. The first switching tube is a PMOS tube, and the second switching tube is an NMOS tube. The source electrode of the first switching tube is connected to the positive terminal of the battery, the drain electrode is connected to the power supply input terminal of the power module, and the gate electrode is connected to the drain electrode of the second switching tube. A first resistor is connected in parallel between the gate electrode and the source electrode of the first switching tube. The source electrode of the second switching tube is connected to the negative terminal of the battery, the gate electrode is connected to the power control terminal of the main control module, and a second resistor is connected in parallel between the gate electrode and the source electrode of the second switching tube. The gate electrode of the first switching tube is connected to the anode of the first diode, the cathode of the first diode is connected to one end of the key switch, the cathode of the second diode and the key signal receiving terminal of the main control module. The anode of the second diode is connected to one end of the third resistor and one end of the first capacitor. The other end of the third resistor is connected to the power supply output terminal of the power module, and the other end of the first capacitor and the other end of the key switch are connected to the negative terminal of the battery.

[0010] Further, the source electrode of the first switching tube is connected to the positive terminal of the battery through a fuse.

[0011] Further, the power module includes a boost unit and a voltage stabilization unit connected in sequence.

[0012] Further, the antenna module includes a three-axis induction receiving antenna, and the three inductance units of the three-axis induction receiving antenna are respectively connected to the first analog signal input terminal, the second analog signal input terminal and the third analog signal input terminal of the main control module.

[0013] Further, the detection signal prompt module includes an LED lamp group arranged on the surface of the housing.

[0014] Further, the detection signal prompt module includes a buzzer arranged inside the housing.

[0015] The beneficial effects of the present utility model are as follows:

[0016] The present utility model provides a test device for an automotive control module. The device is designed to be portable and is powered by a battery itself, facilitating handheld use by users. Through the prompt signal output by the detection signal prompt module, users can accurately locate the key induction area of the vehicle. For new vehicle models, the detection device can quickly locate the key induction area of the vehicle, facilitating the placement of a new key in the key induction area for matching, effectively avoiding the problem that the original vehicle key cannot start the vehicle due to key learning and matching. For vehicles with damaged or missing induction coils in the key induction area due to damage or human factors, the detection device can quickly determine the condition of the coil by approaching the induction area. The detection device can provide timely and effective detection results to ensure that the vehicle can successfully complete the process of matching intelligent keys. Brief Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of an embodiment of a device for detecting the position of a vehicle key induction area according to the present utility model;

[0018] Figure 2 is an internal electrical principle block diagram;

[0019] Figure 3 is a circuit schematic diagram of the power supply control module;

[0020] Figure 4 is a circuit schematic diagram of the power supply module;

[0021] Figure 5 is a circuit schematic diagram of the antenna module;

[0022] Figure 6 is a circuit schematic diagram of the LED lamp group;

[0023] Figure 7 is a circuit schematic diagram of the buzzer.

[0024] In the figure:

[0025] 1 - housing, 2 - button, 3 - LED lamp group. Detailed Embodiment

[0026] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0027] The terms "first", "second", and "third" in this application are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity or order of the indicated technical features. All directional indications (such as up, down, left, right, front, back...) in the embodiments of this application are only used to explain the relative positional relationship or movement conditions between components in a specific posture (as shown in the drawings); it should be noted that when a component is referred to as "fixed to", "disposed on", "connected to" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component, or there may be one or more intermediate components therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0028] As Figures 1 to 7 shown, to solve the problems commonly existing in the prior art, an embodiment of a vehicle key induction area position detection device is proposed in the present utility model, which can passively detect the wireless signal strength of the vehicle key induction area and issue a prompt, and can effectively help the user find the position of the vehicle key induction area to troubleshoot the cause of the failure of the induction key.

[0029] Specifically, referring to Figure 1 and Figure 2 , an embodiment of a vehicle key induction area position detection device includes a housing 1. A battery, a power supply control module, an antenna module, a main control module, and a detection signal prompt module are provided inside the housing 1. The main control module is respectively connected to the power supply control module, the antenna module, and the detection signal prompt module; a key 2 is provided on the surface of the housing, and the key 2 is respectively connected to the power supply control module and the main control module; the antenna module is used to detect the wireless signal of the vehicle key induction area and send it to the main control module; the detection signal prompt module outputs a prompt signal according to the control signal of the main control module, and the prompt signal can indicate the wireless signal strength sensed by the antenna module; the battery supplies power to the entire device through the power supply control module and the power module, and the power supply control module controls the on-off of the power supply line from the battery to the power module according to the signal of the key and the power control signal of the main control module.

[0030] The working principle of the embodiment of the present utility model is as follows: The user triggers the automatic sensing unlocking state of the vehicle by approaching the vehicle door lock, approaching the vehicle driving area, etc., or presses the "one-key start" button to trigger the one-key start state of the vehicle, and the coil at the key sensing area of the vehicle starts to emit a wireless signal. Thereafter, the user long-presses Button 2, and the power supply control module controls the battery to be connected to the power module, and the detection device is powered on. The detection device senses the wireless signal emitted by the vehicle key sensing area through the antenna module. The main control module controls the detection signal prompt module to output a prompt signal according to the sensed signal strength. The prompt signal output by the detection signal prompt module can reflect the signal strength sensed by the antenna module. The user can place the detection device at different positions of the vehicle and judge whether it is close to the vehicle key sensing area and find the position of the vehicle key sensing area according to the output signal of the detection signal prompt module. After the detection is completed, the user can turn off the power supply of the detection device by long-pressing Button 2. If no wireless signal is detected by the antenna module after power-on, the detection device automatically powers off and stops after a set time.

[0031] The embodiment of the present utility model provides a device for detecting the position of a vehicle key sensing area, which is of a portable design and is powered by a battery itself, facilitating the user to hold and use. Through the prompt signal output by the detection signal prompt module, the user can accurately find the position of the vehicle key sensing area. For new models, the detection device can quickly locate the position of the vehicle key sensing area, facilitating the placement of a new key in the key sensing area for matching, effectively avoiding the problem that the original vehicle key cannot start the vehicle due to failed key matching. For vehicles with damaged or artificially damaged and missing induction coils in the key sensing area, the detection device can quickly judge the condition of the coil by approaching the sensing area. The detection device can provide timely and effective detection results to ensure that the vehicle can normally complete the process of matching intelligent keys.

[0032] In some embodiments, refer to Figure 3The power supply control module includes a first switching transistor Q1, a second switching transistor Q2, a first resistor R9, a second resistor R16, a third resistor R11, a first diode D1, a second diode D2, and a first capacitor C9. The first switching transistor Q1 is a PMOS transistor, and the second switching transistor Q2 is an NMOS transistor. The source of the first switching transistor Q1 is connected to the positive terminal of the battery BAT3V+, the drain is connected to the power supply input terminal of the power supply module, and the gate is connected to the drain of the second switching transistor Q2. A first resistor R9 is connected in parallel between the gate and the source of the first switching transistor Q1. The source of the second switching transistor Q2 is connected to the negative terminal of the battery GND, the gate is connected to the power supply control terminal POW_EN of the main control module, and a second resistor R16 is connected in parallel between the gate and the source of the second switching transistor Q2. The gate of the first switching transistor Q1 is connected to the anode of the first diode D1, the cathode of the first diode D1 is connected to one end of the key switch KEY1, the cathode of the second diode D2, and the key signal receiving terminal SPOT of the main control module. The anode of the second diode D2 is connected to one end of the third resistor R11 and one end of the first capacitor C9. The other end of the third resistor R11 is connected to the power supply output terminal VCC-3V3 of the power supply module, and the other end of the first capacitor C9 and the other end of the key switch KEY1 are connected to the negative terminal of the battery GND.

[0033] In a specific implementation, the key switch KEY1 is associated with key 2. When the user long-presses key 2, the key switch KEY1 is turned on, and the gate of the first switching transistor Q1 is connected to the negative terminal GND of the battery through the first diode D1. The first switching transistor Q1 is turned on, and the battery starts to supply power to the power supply module. After being powered on, the main control module turns on the second switching transistor Q2 by setting the power supply control terminal POW_EN high. The gate of the first switching transistor Q1 is connected to the negative terminal GND of the battery through the second switching transistor Q2. At this time, when the user releases key 2, the first switching transistor Q1 remains turned on, and the battery continues to supply power to the power supply module. When the user presses key 2 again, the key signal receiving terminal SPOT of the main control module is low, and at other times, the key signal receiving terminal SPOT of the main control module is in a high impedance state. The operation of the user on key 2 can be received by the main control module. When power-off and shutdown are required, the second switching transistor Q2 is turned off by setting the power supply control terminal POW_EN high. When the user does not press key 2, the gate of the first switching transistor Q1 is in a high impedance state, and the first switching transistor Q1 is turned off, and the detection device is powered off and shut down.

[0034] Through the power supply method flexibly set by the power supply control module, it is convenient for the user to turn on and off the device, can reduce power consumption, and extend the battery usage time.

[0035] In some embodiments, referring to Figure 3 , the source of the first switching transistor Q1 is connected to the positive terminal BAT3V+ of the battery through a fuse F1. The fuse F1 can prevent damage to the detection device caused by excessive current during use.

[0036] In some embodiments, the power supply module includes a boost unit and a voltage stabilizing unit connected in sequence.

[0037] In a specific implementation, refer to Figure 4 , the boost unit includes a DC / DC conversion chip U1. An inductor L1 is connected in parallel between the IN pin and the SW pin. The SW pin is connected to the anode of a diode D6, and the cathode of the diode D6 serves as the output terminal of the boost unit. The cathode of the diode D6 is connected to the battery negative terminal GND through a capacitor C4. The output terminal of the boost unit is also connected to the FB terminal of the DC / DC conversion chip U1 through voltage division by a resistor R2 and a resistor R4 as output feedback. The boost unit can boost the voltage of about 3V of the battery to 4V. The voltage stabilizing unit is mainly a voltage stabilizing chip U3, and the output voltage of the power supply module is stabilized at 3.3V through the voltage stabilizing chip U3. The setting of multiple capacitors is used for filtering and voltage stabilization.

[0038] In some embodiments, refer to Figure 5 , the antenna module includes a three-axis inductive receiving antenna L3, and the three inductive units of the three-axis inductive receiving antenna L3 are respectively connected to the first analog signal input terminal SIG, the second analog signal input terminal SIG2, and the third analog signal input terminal SIG3 of the main control module.

[0039] In a specific implementation, the model of the three-axis inductive receiving antenna L3 can be SMD3D11, and one ends of the three inductive units therein are all connected to the battery negative terminal GND. The power supply output terminal VCC-3V3 of the power supply module is connected to the other end of the first inductive unit of the three-axis inductive receiving antenna L3 after voltage division by a resistor R17 and a resistor R21, and is connected to the first analog signal input terminal SIG of the main control module through a resistor R18. A diode D3 is connected in parallel across the resistor R17. The connection methods of the other two inductive units of the three-axis inductive receiving antenna L3 are the same. The main control module is internally provided with multiple analog-to-digital conversion units, and the first analog signal input terminal SIG, the second analog signal input terminal SIG2, and the third analog signal input terminal SIG3 are respectively connected to the input pins of the respective analog-to-digital conversion units.

[0040] It should be noted that when the main control module receives the output signal of the three-axis inductive receiving antenna L3, the signals of each axis are converted into digital signals through the internally provided analog-to-digital conversion units, and an algorithm logic is set inside the main control module to calculate the strength of the receiving antenna signal.

[0041] In some embodiments, refer to Figure 6 , the detection signal prompt module includes an LED lamp group 3 arranged on the surface of the housing 1, and the LED lamp group 3 includes multiple light-emitting diodes.

[0042] In a specific implementation, multiple lamp control pins (LEV1, LEV2, …, LEV5) of the main control unit are connected to the cathodes of the light-emitting diodes in the LED lamp group 3 through resistors, and the anodes of the light-emitting diodes are all connected to the power supply output terminal VCC-3V3 of the power supply module. The main control unit controls the number of light-emitting diodes in the LED lamp group 3 to be lit according to the strength of the received antenna signal. The stronger the received antenna signal, the more light-emitting diodes are lit; the weaker the received antenna signal, the fewer light-emitting diodes are lit.

[0043] In some embodiments, referring to Figure 7 , the detection signal prompt module includes a buzzer BUZ1 arranged in the housing 1.

[0044] In a specific implementation, the positive terminal of the buzzer BUZ1 is connected to the power supply output terminal VCC-3V3 of the power supply module, the negative terminal is connected to the drain of the NMOS switch tube Q4, the gate of the NMOS switch tube Q4 is connected to the buzzer control terminal BUZ of the control module, the source is connected to the battery negative terminal GND, and a resistor R23 is connected in parallel between the gate and the source. When the buzzer control terminal BUZ of the control module is set high, the NMOS switch tube Q4 is turned on, and the buzzer BUZ1 is powered on to emit a beep. When the buzzer control terminal BUZ of the control module is set low, the NMOS switch tube Q4 is turned off, and the buzzer BUZ1 does not emit a beep. The control module has a built-in PWM unit, and the buzzer control terminal BUZ is connected to the output pin of the PWM unit, and can output a PWM wave. The main control unit controls the beeping frequency by controlling the frequency of the PWM wave output, which can be set so that the stronger the received antenna signal, the higher the beeping frequency and the sharper the sound, and the weaker the received antenna signal, the lower the beeping frequency and the slower the sound.

[0045] The present invention is not limited to the above optional implementation manners. Anyone can obtain other various forms of products under the inspiration of the present invention. However, no matter what changes are made in its shape or structure, as long as the technical solutions fall within the scope defined by the claims of the present invention, they are all within the protection scope of the present invention.

Claims

1. A vehicle key sensing area position detection device, characterized in that: include: A shell (1), wherein a battery, a power supply control module, an antenna module, a main control module and a detection signal prompt module are arranged inside the shell (1), and the main control module is respectively connected to the power supply control module, the antenna module and the detection signal prompt module; a button (2) is arranged on the surface of the shell, and the button (2) is respectively connected to the power supply control module and the main control module; the antenna module is used to detect the wireless signal in the vehicle key sensing area and send it to the main control module; the detection signal prompt module outputs a prompt signal according to the control signal of the main control module, and the prompt signal can indicate the strength of the wireless signal sensed by the antenna module; the battery supplies power to the entire device through the power supply control module and the power supply module, and the power supply control module controls the on-off of the power supply line from the battery to the power supply module according to the signal of the button and the power supply control signal of the main control module.

2. A vehicle key sensing area position detection device according to claim 1, characterized in that: The power supply control module comprises a first switch tube (Q1), a second switch tube (Q2), a first resistor (R9), a second resistor (R16), a third resistor (R11), a first diode (D1), a second diode (D2) and a first capacitor (C9); the first switch tube (Q1) is a PMOS tube, the second switch tube (Q2) is an NMOS tube, the source of the first switch tube (Q1) is connected to the positive terminal of the battery (BAT3V+), the drain is connected to the power supply input terminal of the power supply module, and the gate is connected to the drain of the second switch tube (Q2); the first resistor (R9) is connected in parallel between the gate and the source of the first switch tube (Q1), the source of the second switch tube (Q2) is connected to the negative terminal of the battery (GND), and the gate is connected to the power supply of the main control module. A control terminal (POW_EN), a second resistor (R16) is connected in parallel between the gate and source of the second switch tube (Q2), the gate of the first switch tube (Q1) is connected to the anode of the first diode (D1), the cathode of the first diode (D1) is connected to one end of the key switch (KEY1), the cathode of the second diode (D2) and the key signal receiving terminal (SPOT) of the main control module, the anode of the second diode (D2) is connected to one end of the third resistor (R11) and one end of the first capacitor (C9), the other end of the third resistor (R11) is connected to the power supply output terminal (VCC-3V3) of the power module, and the other end of the first capacitor (C9) and the other end of the key switch (KEY1) are connected to the negative terminal (GND) of the battery.

3. A vehicle key sensing area position detection device according to claim 2, characterized in that: The source of the first switch tube (Q1) is connected to the positive terminal (BAT3V+) of the battery through a fuse (F1).

4. A vehicle key sensing area position detection device according to claim 1, characterized in that: The power module comprises a voltage boost unit and a voltage stabilizing unit which are connected in sequence.

5. The vehicle key sensing area position detection device according to claim 1, characterized in that: The antenna module comprises a three-axis inductive receiving antenna (L3), and three inductive units of the three-axis inductive receiving antenna (L3) are respectively connected to a first analog signal input terminal (SIG), a second analog signal input terminal (SIG2) and a third analog signal input terminal (SIG3) of the main control module.

6. The vehicle key sensing area position detection device according to claim 1, characterized in that: The detection signal prompt module comprises an LED light group (3) arranged on the surface of the housing (1).

7. The vehicle key sensing area position detection device according to claim 1, characterized in that: The detection signal prompt module comprises a buzzer (BUZ1) arranged in the housing (1).

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