Device for detecting electric quantity of automobile remote control key

Abstract

The utility model is suitable for the field of automobile detection, and provides a device for detecting the electric quantity of an automobile remote control key, which comprises a power supply module, and a main control module, a wireless signal detection module and a display module which are respectively connected with the power supply module, and the main control module is also respectively connected with the wireless signal detection module and the display module. The battery capacity of the automobile remote control key can be detected in a lossless manner without dismounting the shell of the automobile remote control key.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of automobile detection, especially relates to a device for detecting the electric quantity of automobile remote key. BACKGROUND

[0002] The automobile remote key is generally powered by a button cell, and transmits wireless signals to lock and unlock the automobile, but the button cell is sealed in the key shell and cannot be directly measured by conventional multimeter or other tools. SUMMARY

[0003] The utility model discloses a device for detecting the electric quantity of automobile remote key, which aims to solve the problem of how to nondestructively detect the battery capacity of the automobile remote key.

[0004] The utility model provides a device for detecting the electric quantity of automobile remote key, including power supply module and respectively with power supply module connects the main control module, wireless signal detection module and display module, the main control module still respectively connects wireless signal detection module and display module,

[0005] The wireless signal detection module is used for receiving the wireless signal transmitted by the automobile remote key, demodulating the wireless signal, and obtaining the frequency value and intensity value of the wireless signal.

[0006] The main control module is used for obtaining the frequency value and intensity value of the wireless signal from the wireless signal detection module, obtaining the remaining battery capacity of the automobile remote key according to the frequency value of the wireless signal, the corresponding intensity value, and the corresponding relationship between the intensity value of the wireless signal and the battery capacity of the automobile remote key, and controlling the display module to display the remaining battery capacity and / or the frequency value of the wireless signal.

[0007] Further, the wireless signal detection module includes an antenna and a wireless signal receiving chip connected to the antenna, the SPI interface of the wireless signal receiving chip is connected to the main control module, and the main control module configures the wireless signal receiving chip and obtains the frequency value and intensity value of the wireless signal through the SPI interface.

[0008] Further, the device further includes a CAN bus and a K-line detection circuit, and the CAN bus and the K-line detection circuit are respectively connected to the main control module and the power supply module.

[0009] The CAN bus and the K-line detection circuit are used for data interaction with the automobile through the CAN bus or the K-line, and reading the relevant state information of the automobile.

[0010] The master module is also used for obtaining relevant state information of the automobile from the CAN bus and K-line detection circuit, processing the relevant state information, obtaining automobile fault codes, and controlling the display module to display the automobile fault codes.

[0011] Further, the CAN bus and K-line detection circuit comprises an MCU master control chip, and a CAN transceiver and a K-line single-end conversion transceiving GPIO circuit connected with the MCU master control chip respectively, the CAN bus and K-line detection circuit further comprises an automobile CAN bus interface connector connected with the CAN transceiver, and an automobile K-line interface connector connected with the K-line single-end conversion transceiving GPIO circuit; the MCU master control chip is connected with the master module.

[0012] Further, the MCU master control chip is built-in with a CAN controller, and the CAN controller is connected with the CAN transceiver.

[0013] Further, the MCU master control chip is built-in with a transceiving GPIO, and the transceiving GPIO is connected with the K-line single-end conversion transceiving GPIO circuit.

[0014] Further, the device further comprises an input module, and the input module is connected with the master module and the power supply module respectively.

[0015] In the utility model, the frequency value and the intensity value of wireless signal are obtained through wireless signal detection module, and the residual battery capacity of automobile remote key is obtained according to the frequency value and the corresponding intensity value of wireless signal and the corresponding relation between the intensity value of wireless signal and the battery capacity of automobile remote key. Therefore, the shell of automobile remote key can be exempted from disassembling, and the battery capacity of automobile remote key is detected without damage. Since the CAN bus and K-line detection circuit are further included, the relevant state information of automobile is obtained through the CAN bus and K-line detection circuit, and the automobile fault codes are obtained. Therefore, the device has the functions of detecting the battery capacity of automobile remote key and automobile fault, and brings convenience for automobile maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural block diagram of the device for detecting the battery capacity of automobile remote key provided by an embodiment of the utility model.

[0017] Figure 2 It is a circuit principle diagram of the wireless signal detection module provided by an embodiment of the utility model.

[0018] Figure 3 It is a structural block diagram of another device for detecting the battery capacity of automobile remote key provided by an embodiment of the utility model.

[0019] Figure 4It is a structure block diagram of the CAN bus and K-line detection circuit provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0020] In order to make the utility model purposes, technical solutions and beneficial effects more clearly, the following will be further described in detail by combining with the drawings and examples. It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.

[0021] In order to explain the technical solutions of the utility model, the following will be explained by specific examples.

[0022] Please refer to Figure 1 The utility model an embodiment provides a device for detecting automobile remote key electric quantity, including power supply module 101 and respectively with power supply module 101 connection's main control module 102, wireless signal detection module 103 and display module 104;The main control module 102 still respectively connects wireless signal detection module 103 and display module 104;

[0023] The wireless signal detection module 103 is used to receive the wireless signal of automobile remote key emission, and the frequency value and intensity value of wireless signal are obtained by demodulating the wireless signal;

[0024] The main control module 102 is used to obtain the frequency value and intensity value of wireless signal from wireless signal detection module 103, and the remaining battery capacity of automobile remote key is obtained according to the frequency value and corresponding intensity value of wireless signal and the corresponding relationship between the intensity value of preset wireless signal and the battery capacity of automobile remote key, and the display module is controlled to display the remaining battery capacity and / or the frequency value of wireless signal.

[0025] In the utility model an embodiment, the display module 104 can be LCD display screen or LED display screen. The display module 104 can display the remaining battery capacity of automobile remote key and / or the frequency value of wireless signal, and also can display automobile fault code, to facilitate maintenance work.

[0026] The automobile remote key electric quantity detection process is as follows:

[0027] S1, the frequency commonly used for automobile remote key, such as 315MHZ and 433.92MHZ etc. is preexisting in the memory of main control module, and is suitable for the application scene that user knows the frequency of automobile remote key of his own car;

[0028] When the user does not know the frequency of the car remote key, the traversal method can be used to input a frequency value on the device for detecting the power of the car remote key in sequence, the frequency value is the frequency commonly used by the car remote key, when the car remote key button is triggered, if the device detects the frequency signal, the display module 104 displays, if the device cannot detect the frequency signal, it will prompt that the frequency is incorrect, until the frequency of the car remote key is found.

[0029] S2, when the frequency of the car remote key is found, the frequency can be recorded in the device, and the power of the car remote key is detected, when any button of the car remote key is pressed and triggered, the device can demodulate the signal of the frequency, calculate the strength value of the wireless signal, and the main control module 102 can calculate the percentage value of the current battery remaining capacity according to the preset corresponding relationship between the strength value of the wireless signal and the battery capacity of the car remote key.

[0030] The preset corresponding relationship between the strength value of the wireless signal and the battery capacity of the car remote key can be obtained by the following method:

[0031] For example, the battery capacity of the car remote key is measured by a conventional tool, when the battery capacity is 100%, the strength value of the wireless signal emitted by the car remote key is recorded as 100%, when the battery capacity is 90%, the strength value of the wireless signal emitted by the car remote key is recorded as 90%, and so on. If you want to detect the remaining capacity of the car remote key, the wireless signal detection module 103 receives the wireless signal emitted by the car remote key, demodulates the signal, obtains the frequency value and strength value of the wireless signal, the main control module 102 obtains the frequency value and strength value of the wireless signal from the wireless signal detection module 103, obtains the remaining battery capacity of the car remote key according to the frequency value of the wireless signal, the corresponding strength value and the preset corresponding relationship between the strength value of the wireless signal and the battery capacity of the car remote key, and controls the display module to display the remaining battery capacity and / or the frequency value of the wireless signal.

[0032] In an embodiment of the utility model, the power supply module 101 is composed of 12V power supply and battery power supply circuit. The two power supplies can supply power to each module together, or can supply power individually.

[0033] In an embodiment of the utility model, the main control module 102 is a central processing unit.

[0034] In an embodiment of the utility model, wireless signal detection module 103 including antenna and with antenna connection wireless signal receiving chip, wireless signal receiving chip's SPI interface connects host module 102, host module 102 is configured to wireless signal receiving chip through SPI interface and obtains the frequency value and intensity value of wireless signal.

[0035] The model of the wireless signal receiving chip is CC1101.

[0036] Figure 2 It is the circuit schematic diagram of wireless signal detection module, and the wireless signal receiving chip CC1101 is configured by the host module, so that the wireless signal receiving chip CC1101 can receive the wireless signals of 315, 433, 868 and 915 MHz ISM / SRDbands, and the frequency values and energy values of the wireless signals are obtained, and the host module 102 obtains the frequency value and intensity value of the wireless signal through the SPI interface.

[0037] Please refer to Figure 3 In an embodiment of the utility model, the device further includes CAN bus and K line detection circuit 105, CAN bus and K line detection circuit 105 are connected with host module 102 and power supply module 101 respectively;

[0038] The CAN bus and K line detection circuit 105 are used for data interaction with the automobile through CAN bus or K line, and the relevant state information of the automobile is read;

[0039] The host module 102 is further used to obtain the relevant state information of the automobile from the CAN bus and K line detection circuit 105, process the relevant state information, obtain the automobile fault code, and control the display module to display the automobile fault code.

[0040] Please refer to Figure 4 In an embodiment of the utility model, the CAN bus and K line detection circuit 105 include MCU host chip 201, and CAN transceiver 202 and K line single-ended conversion transceiver GPIO circuit 203 connected with MCU host chip 201 respectively, the CAN bus and K line detection circuit further include automobile CAN bus interface connector 204 connected with CAN transceiver 202, and automobile K line interface connector 205 connected with K line single-ended conversion transceiver GPIO circuit 203; MCU host chip 201 is connected with host module 102.

[0041] The CAN bus and K line detection circuit can read the fault code of the relevant vehicle model from the interface of automobile CAN bus interface connector and automobile K line interface connector, compare the read fault code data with the standard parameter, and correctly judge the performance of the whole machine.

[0042] In an embodiment of the utility model, the MCU main control chip is built-in CAN controller, the CAN controller is connected CAN transceiver. Through CAN transceiver and automobile CAN bus interface connector with CAN network on the car information interaction is carried out.

[0043] In an embodiment of the utility model, the MCU main control chip is built-in transceiver GPIO, the transceiver GPIO connects K line single-ended conversion transceiver GPIO circuit.

[0044] The working principle of the CAN bus and K line detection circuit is:

[0045] The K line is used to inquire the automobile MCU main control chip, and the K line and the automobile MCU main control chip exchange data through the device for detecting the electric quantity of the automobile remote key.

[0046] The CAN bus transmits signals through twisted pair, adopts multi-master working mode, each node can actively send messages, realizes information sharing and exchange.The MCU main control chip of the CAN bus and K line detection circuit is built-in CAN controller, and the CAN controller exchanges information with the CAN network on the car through external CAN transceiver.

[0047] In an embodiment of the utility model, the device for detecting the electric quantity of the automobile remote key further includes an input module, and the input module is connected with the main control module and the power supply module respectively. The input module is used to input the frequency value of the automobile remote key, when the automobile remote key button is triggered, if the device detects the frequency signal, the frequency value will be displayed on the display module, if the frequency signal cannot be detected, it will be prompted that the frequency is not correct, until the frequency value of the automobile remote key is found.

[0048] The embodiment of the utility model obtains the frequency value and intensity value of the wireless signal through the wireless signal detection module, obtains the residual battery capacity of the automobile remote key according to the frequency value and corresponding intensity value of the wireless signal and the corresponding relationship between the intensity value of the wireless signal and the battery capacity of the automobile remote key. Therefore, the shell of the automobile remote key can be removed without damaging the battery capacity of the automobile remote key. In addition, the device also includes the CAN bus and K line detection circuit, and the relevant state information of the automobile is obtained through the CAN bus and K line detection circuit, and the automobile fault code is obtained. Therefore, the device has the functions of detecting the electric quantity of the automobile remote key and the automobile fault, which brings convenience to automobile maintenance.

[0049] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A device for detecting the battery level of a car remote key, characterized in that, The device comprises a power supply module, and a master control module, a wireless signal detection module and a display module connected with the power supply module respectively; the master control module is further connected with the wireless signal detection module and the display module respectively. The wireless signal detection module is used for receiving the wireless signal emitted by the automobile remote key, demodulating the wireless signal, and obtaining the frequency value and intensity value of the wireless signal. The master control module is used for obtaining the frequency value and intensity value of the wireless signal from the wireless signal detection module, obtaining the residual battery capacity of the automobile remote key according to the frequency value of the wireless signal, the corresponding intensity value, and the preset corresponding relationship between the intensity value of the wireless signal and the battery capacity of the automobile remote key, and controlling the display module to display the residual battery capacity and / or the frequency value of the wireless signal.

2. The apparatus of claim 1, wherein, The wireless signal detection module comprises an antenna and a wireless signal receiving chip connected with the antenna; an SPI interface of the wireless signal receiving chip is connected with the master control module; the master control module configures the wireless signal receiving chip and obtains the frequency value and intensity value of the wireless signal through the SPI interface.

3. The apparatus of claim 1, wherein, The device further comprises a CAN bus and a K-line detection circuit, which are connected with the master control module and the power supply module respectively. The CAN bus and the K-line detection circuit are used for data interaction with the automobile through the CAN bus or the K-line, and reading the relevant state information of the automobile. The master control module is further used for obtaining the relevant state information of the automobile from the CAN bus and the K-line detection circuit, processing the relevant state information, obtaining the automobile fault code, and controlling the display module to display the automobile fault code.

4. The apparatus of claim 3, wherein, The CAN bus and the K-line detection circuit comprise an MCU master control chip, a CAN transceiver and a K-line single-ended conversion transceiving GPIO circuit connected with the MCU master control chip respectively; the CAN bus and the K-line detection circuit further comprise an automobile CAN bus interface connector connected with the CAN transceiver, and an automobile K-line interface connector connected with the K-line single-ended conversion transceiving GPIO circuit; the MCU master control chip is connected with the master control module.

5. The apparatus of claim 4, wherein, The MCU master control chip is built-in with a CAN controller, and the CAN controller is connected with the CAN transceiver.

6. The apparatus of claim 4, wherein, The MCU master control chip is built-in with a transceiving GPIO, and the transceiving GPIO is connected with the K-line single-ended conversion transceiving GPIO circuit.

7. The apparatus of claim 1, wherein, The device further comprises an input module connected with the master control module and the power supply module respectively.

Images