Vehicle-mounted physical key, control method and storage medium

Abstract

The invention discloses a vehicle-mounted physical key, a control method and a storage medium. The vehicle-mounted physical key comprises a UWB system-on-chip, a charge pump and a UWB antenna, the UWB system-on-chip is electrically connected with the UWB antenna and the charge pump; the charge pump is used for supplying power to the UWB system-on-chip, so that the UWB system-on-chip carries out positioning and ranging based on the UWB antenna; and when positioning and ranging of the UWB system-on-chip are completed, the charge pump is disconnected with the UWB system-on-chip, the charge pump stops supplying power to the UWB system-on-chip, and the UWB system-on-chip is in a standby state. According to the vehicle-mounted physical key, the charge pump is arranged in the vehicle-mounted physical key, the output current can be improved through the charge pump to supply power to the UWB system-level chip, the service life of the vehicle-mounted physical key is prolonged, and the heating value of a battery of the vehicle-mounted physical key is reduced.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a vehicle-mounted physical key, a control method, and a storage medium. Background Art

[0002] Most existing physical vehicle key solutions use button batteries to power the system. The battery capacity is small, the battery life is limited, and it needs to be replaced regularly. The service life is about one or two years. As the key solution becomes more intelligent and more functions are added, the battery consumes power faster and faster.

[0003] For example, Ultra Wide Band (UWB) technology is increasingly being used in the field of in-vehicle physical keys due to its high ranging accuracy. However, it requires a relatively large current. In particular, when using UWB ranging and positioning, the continuous current consumption due to the large load will cause the battery capacity to decline rapidly, further reducing the service life of the in-vehicle physical key. Summary of the Invention

[0004] The present invention provides a vehicle-mounted physical key, a control method and a storage medium to solve the problem in the prior art that the battery of the vehicle-mounted physical key consumes power too quickly and has a short service life.

[0005] In a first aspect, a vehicle-mounted physical key is provided, comprising: a UWB system-level chip, a charge pump, and a UWB antenna; the UWB system-level chip is electrically connected to the UWB antenna and the charge pump;

[0006] The charge pump is used to supply power to the UWB system-level chip, so that the UWB system-level chip performs positioning and ranging based on the UWB antenna;

[0007] When the positioning and ranging of the UWB system-level chip is completed, the charge pump is disconnected from the UWB system-level chip, and the charge pump stops supplying power to the UWB system-level chip, and the UWB system-level chip is in a standby state.

[0008] Optionally, the vehicle-mounted physical key also includes: a button battery and a Bluetooth Low Energy (BLE) system-level chip, the button battery is electrically connected to the charge pump and the BLE system-level chip, and is used to charge the charge pump, power the BLE system-level chip, and power the UWB system-level chip in standby state.

[0009] Optionally, the charge pump includes a selection switch, and the selection switch has three terminals, wherein a first terminal is electrically connected to the UWB system chip, a second terminal is electrically connected to the button battery, and a third terminal is grounded.

[0010] Optionally, the charge pump further includes a capacitor, which is used to store electrical energy when the button battery charges the charge pump.

[0011] Optionally, the vehicle-mounted physical key further includes: a Bluetooth antenna, the BLE system-level chip is electrically connected to the Bluetooth antenna, and the BLE system-level chip detects the distance between the vehicle-mounted physical key and the vehicle based on the Bluetooth antenna.

[0012] Optionally, when the distance between the on-board physical key and the vehicle does not reach a set distance threshold, the second terminal in the charge pump is connected to the third terminal and the first terminal, and the button battery continues to charge the charge pump and power the UWB system-level chip in standby state.

[0013] Optionally, the BLE system-on-chip is electrically connected to the charge pump and the UWB system-on-chip, and the BLE system-on-chip is specifically used to:

[0014] When the distance between the on-board physical key and the vehicle reaches a set distance threshold, a first control signal is sent to the UWB system-level chip to control the UWB system-level chip to turn on, and a second control signal is sent to the charge pump to control the second terminal of the charge pump to be disconnected from the third terminal and the first terminal, so that the button battery stops charging the charge pump and stops supplying power to the UWB system-level chip in the standby state, and controls the first terminal of the charge pump to be connected to the third terminal, so that the charge pump supplies power to the UWB system-level chip;

[0015] When the positioning and ranging of the UWB system-level chip is completed, a third control signal is sent to the charge pump based on the feedback information received from the UWB system-level chip to control the first terminal and the third terminal in the charge pump to be disconnected so that the charge pump stops supplying power to the UWB system-level chip, and controls the second terminal in the charge pump to be connected to the third terminal and the first terminal, and the button battery charges the charge pump and supplies power to the UWB system-level chip in the standby state.

[0016] In a second aspect, a method for controlling a vehicle-mounted physical key is provided. The method is applied to the vehicle-mounted physical key described in any embodiment of the present invention, comprising:

[0017] Real-time detection of the distance between the vehicle-mounted physical key and the vehicle;

[0018] When the distance reaches a set distance threshold, the UWB system chip is controlled to turn on, and the charge pump is controlled to power the UWB system chip, so that the UWB system chip is turned on and powered on to perform positioning and ranging.

[0019] When the UWB system-level chip positioning and ranging are completed, the charge pump is controlled to stop supplying power to the UWB system-level chip, the UWB system-level chip is in a standby state, and the button battery is controlled to charge the charge pump.

[0020] Optionally, the distance between the vehicle-mounted physical key and the vehicle is detected in real time, and further includes:

[0021] When the distance does not reach a set distance threshold, the button battery is controlled to continuously charge the charge pump.

[0022] In a third aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the vehicle-mounted physical key control method described in any embodiment of the present invention when executed.

[0023] The technical solution of an embodiment of the present invention provides a vehicle-mounted physical key, comprising: a UWB system-level chip, a charge pump, and a UWB antenna; the UWB system-level chip is electrically connected to the UWB antenna and the charge pump; the charge pump is used to power the UWB system-level chip so that the UWB system-level chip can perform positioning and ranging based on the UWB antenna; when the UWB system-level chip completes positioning and ranging, the charge pump is disconnected from the UWB system-level chip, and the charge pump stops powering the UWB system-level chip, and the UWB system-level chip is in a standby state. The present invention provides a charge pump in the vehicle-mounted physical key, which can increase the output current to power the UWB system-level chip. This solves the problem in the prior art that the vehicle-mounted physical key battery directly powers the UWB system-level chip, causing the vehicle-mounted physical key battery to consume too quickly and the vehicle-mounted physical key to have a too short service life. This extends the service life of the vehicle-mounted physical key and reduces the heat generated by the vehicle-mounted physical key battery.

[0024] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A schematic structural diagram of a vehicle-mounted physical key provided in the first embodiment of the present invention;

[0027] Figure 2A working principle diagram of a charge pump provided in Example 1 of the present invention;

[0028] Figure 3 This is a flow chart of a vehicle-mounted physical key control method provided in the second embodiment of the present invention;

[0029] Figure 4 This is a complete flow chart of a vehicle-mounted physical key control method provided in the second embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0031] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] Example 1

[0033] Figure 1 This is a structural diagram of a vehicle-mounted physical key provided in the first embodiment of the present invention. This embodiment is applicable to situations where positioning and ranging are performed using a vehicle-mounted physical key, such as Figure 1 As shown, a vehicle-mounted physical key provided by the first embodiment of the present invention includes: a UWB system-on-chip (UWB SOC) U200, a charge pump U300, and a UWB antenna J300; in this embodiment, the UWB system-on-chip U200 can be a device for performing positioning and ranging functions; the charge pump 2 can be a device for powering the UWB system-on-chip U200; the UWB antenna J300 can be a device for combining with the UWB system-on-chip U200 to transmit and receive wireless radio frequency signals, and to identify and eliminate interference caused by multipath effects through signal processing algorithms, thereby improving the accuracy of ranging.

[0034] The UWB system-on-chip U200 is electrically connected to the UWB antenna J300 and the charge pump U300. The UWB antenna J300 can be electrically connected to the UWB system-on-chip U200 by welding or using a connector. The charge pump 2 can be directly electrically connected to the corresponding pins on the UWB system-on-chip U200 through wires, traces on a circuit board, or other methods. The specific electrical connection method is not limited in this embodiment.

[0035] The charge pump U300 is used to power the UWB system-level chip U200 so that the UWB system-level chip U200 can perform positioning and ranging based on the UWB antenna J300. Specifically, the charge pump U300 can provide a relatively large current capacity and can power the UWB system-level chip 1 when the positioning and ranging conditions are met, wherein the positioning and ranging conditions may refer to the distance between the vehicle-mounted physical key and the vehicle reaching a preset distance threshold. For example, the distance threshold may be 20m. After the UWB system-level chip is powered on, it can be combined with the UWB antenna J300 to perform precise positioning and ranging. It can also use signal processing algorithms to identify and eliminate interference from multipath effects, further improving the accuracy of ranging; wherein, the signal processing algorithm can be a Time of Flight (TOF) bilateral algorithm, a Multiple Signal Classification (MUSIC) algorithm, an Estimation of Signal Parameters via Rotational Invariance Techniques (ESPRIT), etc.

[0036] When the positioning and ranging of the UWB system-level chip U200 is completed, the charge pump U300 is disconnected from the UWB system-level chip U200, and the charge pump U300 stops supplying power to the UWB system-level chip U200. At this time, the UWB system-level chip U200 is in standby state, and the button battery in the vehicle's physical key can be used to power the UWB system-level chip U200 in standby state.

[0037] Specifically, when the UWB SoC U200 completes positioning and ranging, it generates a "ranging completed" feedback message. Based on this feedback, the charge pump U300 disconnects from the UWB SoC U200 and stops supplying power to the UWB SoC U200. At this point, the UWB SoC U200 is in standby mode, after which the button battery can power the standby UWB SoC U200. In low-power mode, the UWB SoC can reduce current to the microampere (uA) level, without generating any heat. Therefore, after the charge pump U300 stops supplying power to the UWB system-level chip U200, the UWB system-level chip U200 is in a low-power standby state. Specifically, the button battery can be used to power the UWB system-level chip U200 in the standby state through the charge pump U300. In this state, the UWB system-level chip U200 can receive external signals or commands to be reactivated when needed, and this standby mode helps save power while maintaining responsiveness. When the positioning and ranging conditions are met, the UWB system-level chip U200 can be reactivated and turned on, and positioning and ranging can continue after the charge pump U300 supplies power to the UWB system-level chip again.

[0038] In this embodiment, a vehicle-mounted physical key is provided, which includes: a UWB system-level chip, a charge pump, and a UWB antenna; the UWB system-level chip is electrically connected to the UWB antenna and the charge pump; the charge pump is used to power the UWB system-level chip so that the UWB system-level chip can perform positioning and ranging based on the UWB antenna; when the positioning and ranging of the UWB system-level chip are completed, the charge pump is disconnected from the UWB system-level chip, and the charge pump stops powering the UWB system-level chip, and the UWB system-level chip can be powered by a button battery; the present invention can flexibly power the UWB system-level chip through the charge pump according to actual conditions, so that the vehicle-mounted physical key can achieve low-power operation while ensuring high-performance positioning and ranging, effectively saving the electric energy consumed by the vehicle-mounted physical key battery and extending the service life of the vehicle-mounted physical key. Furthermore, if the vehicle-mounted physical key battery directly supplies power to the UWB system-level chip with a continuous high current output, the vehicle-mounted physical key battery will generate heat. By setting a charge pump, the output current can be increased to power the UWB system-level chip. This not only solves the problem in the prior art that the vehicle-mounted physical key battery directly supplies power to the UWB system-level chip, resulting in excessive power consumption of the vehicle-mounted physical key and a short service life of the vehicle-mounted physical key, but also reduces the heat generated by the vehicle-mounted physical key battery.

[0039] Optionally, the vehicle physical key also includes: a button battery J100 and a BLE system-level chip (BLE SOC) U100. The button battery J100 is electrically connected to the charge pump U300 and the BLE system-level chip U100, and is used to charge the charge pump U300, power the BLE system-level chip U100, and power the UWB system-level chip U200 in standby mode.

[0040] The button battery J100 may refer to a small, round, flat battery. There are various types of button battery J100, such as alkaline batteries, zinc-air batteries, silver oxide batteries, and lithium-manganese batteries. The BLE system-on-chip U100 may refer to a chip that integrates Bluetooth Low Energy (BLE) communication functions, a processor core, memory, and possibly other external devices and interfaces.

[0041] In this embodiment, the button battery J100 in the vehicle physical key is electrically connected to the charge pump U300 and the BLE system-level chip U100. It can be used to charge the charge pump U300 when the positioning and ranging conditions are not met, or when the positioning and ranging of the UWB system-level chip U200 is completed, to power the BLE system-level chip U100 in real time, and to power the UWB system-level chip U200 in standby state through the charge pump U300.

[0042] Optionally, the charge pump U300 includes a selection switch, which has three terminals, wherein the first terminal is electrically connected to the UWB system chip, the second terminal is electrically connected to the button battery J100, and the third terminal is grounded through the energy storage capacitor.

[0043] A selector switch is a switching device that combines the functions of a tap selector and a diverter switch, capable of carrying and switching current. It can be used to select different input signals, control different output devices, or switch different circuit paths. The terminals in a selector switch refer to electrical components used to connect different parts of a circuit to select and control the current path.

[0044] Specifically, the charge pump U300 can also be designed as an integrated circuit and packaged into an integrated chip. The corresponding pins are controlled by the BLE system-level chip to connect the lines, thereby realizing charging control of the UWB system-level chip.

[0045] In this embodiment, Figure 2 A working principle diagram of a charge pump provided in the first embodiment of the present invention is shown as follows: Figure 2As shown, the first terminal S1 is electrically connected to the UWB system chip. When the positioning and ranging conditions are met, the first terminal S1 in the charge pump U300 can be controlled to be connected to the third terminal S3, so that the charge pump U300 can power the UWB system chip. The second terminal S2 is electrically connected to the button battery J100. When the positioning and ranging conditions are not met, or when the positioning and ranging of the UWB system chip is completed, the second terminal S2 in the charge pump U300 can be controlled to be connected to the third terminal S3 and the first terminal S1, so that the button battery J100 can charge the charge pump U300 and power the UWB system chip U200 in standby mode. Among them, Line2 and n4 are the same line, and Line1 and n1 are the same line.

[0046] Optionally, the charge pump U300 further includes a capacitor C100, which is used to store electrical energy when the button battery J100 charges the charge pump U300.

[0047] The capacitor C100 may refer to a device for storing charge and electric energy, and specifically may refer to a device for storing charge and electric energy composed of two electrodes made of conductors that are close to and insulated from each other. Figure 2 As shown, the capacitor C100 is located between the third terminal and the ground.

[0048] In this embodiment, when the second terminal of the charge pump U300 is connected to the third terminal, the capacitor C100 can store the energy used by the button cell battery J100 to charge the charge pump U300. When the first terminal of the charge pump U300 is connected to the third terminal, the capacitor C100 can provide a relatively high current capacity to power the UWB system-on-chip U200.

[0049] Optionally, the vehicle-mounted physical key also includes: a Bluetooth antenna J200, a BLE system-level chip U100 electrically connected to the Bluetooth antenna J200, and the BLE system-level chip U100 communicates with the electronic control unit (ECU) in the vehicle based on the Bluetooth antenna J200. The ECU in the vehicle will calculate the distance between the physical key and the vehicle based on the signal strength of the Bluetooth signal emitted by the Bluetooth antenna J200, and after calculating the distance information, the distance information will be fed back to the BLE system-level chip U100 through the Bluetooth antenna J200, where the distance information can refer to a specific distance value, for example, 70m, 50m, etc.

[0050] Among them, the Bluetooth antenna J200 can refer to a wireless communication device specifically used to receive and send Bluetooth signals; the BLE system-level chip U100 can be connected to the vehicle through the Bluetooth antenna J200 to realize short-distance wireless data communication between the vehicle-mounted physical key and the vehicle.

[0051] In this embodiment, when the on-board physical key approaches the vehicle, the vehicle will send a Bluetooth signal; after the BLE system-level chip U100 in the on-board physical key receives the Bluetooth signal through the Bluetooth antenna J200, the ECU in the vehicle will estimate the distance between the on-board physical key and the vehicle based on the strength and quality of the signal.

[0052] Optionally, when the distance between the on-board physical key and the vehicle does not reach the set distance threshold, the second terminal in the charge pump U300 is connected to the third terminal and the first terminal, and the button battery J100 continues to charge the charge pump U300 and power the UWB system-level chip U200 in standby mode.

[0053] Specifically, when the distance between the on-board physical key and the vehicle does not reach the set distance threshold, it means that the distance between the on-board physical key and the vehicle is far. At this time, the UWB system-level chip U200 in the on-board physical key has not been turned on and is in standby mode. The button battery J100 can be used to power the UWB system-level chip U200 in standby mode with a current of microamperes uA. This not only saves the standby current loss of the UWB system-level chip U200, but the button battery J100 can also charge the charge pump U300 with a smaller current (such as 10mA, 20mA, etc.), effectively saving the energy consumed by the on-board physical key battery and extending the service life of the on-board physical key.

[0054] Optionally, the BLE system-on-chip U100 is electrically connected to the charge pump U300 and the UWB system-on-chip U200. The BLE system-on-chip is specifically used for:

[0055] When the distance reaches the set distance threshold, a first control signal is sent to the UWB system-level chip U200 to control the UWB system-level chip U200 to turn on, and a second control signal is sent to the charge pump U300 to control the second terminal of the charge pump U300 to be disconnected from the third terminal and the first terminal, so that the button battery J100 stops charging the charge pump U300 and stops supplying power to the UWB system-level chip in the standby state, and controls the first terminal of the charge pump U300 to be connected to the third terminal, so that the charge pump U300 supplies power to the UWB system-level chip U200;

[0056] The first control signal may be a signal that controls the activation of the UWB system-on-chip U200, and the second control signal may be a signal that controls the disconnection of the second terminal from the third terminal and the first terminal in the charge pump U300, switching the connection between the first terminal and the third terminal. Specifically, the control signal may be transmitted via a full-duplex synchronous serial peripheral interface (SPI) bus communication method.

[0057] For example, it can be assumed that the set distance is 20m, and when the on-board physical key approaches the vehicle, the BLE system-level chip U100 can detect that the distance between the on-board physical key and the vehicle is approximately 70m through the Bluetooth antenna J200. When the BLE system-level chip U100 detects that the distance between the on-board physical key and the vehicle is approximately 20m and reaches the set distance threshold, the BLE system-level chip sends a first control signal to the UWB system-level chip U200 to control the UWB system-level chip U200 to turn on; and sends a second control signal to the charge pump U300 to control the second terminal and the third terminal and the first terminal in the charge pump U300 to be disconnected, so that the button battery J100 stops charging the capacitor C100 in the charge pump U300 and stops supplying power to the UWB system-level chip U300 in the standby state, and controls the first terminal and the third terminal in the charge pump U300 to be connected, so that the capacitor C100 in the charge pump U300 supplies power to the UWB system-level chip U200.

[0058] In this embodiment, when the distance reaches a set distance threshold, a first control signal is sent to the UWB system-level chip to control the UWB system-level chip to turn on, and a second control signal is sent to the charge pump to control the second terminal in the charge pump to be disconnected from the third terminal and the first terminal, so that the button battery stops supplying power to the charge pump and stops supplying power to the UWB system-level chip in the standby state, and the first terminal and the third terminal in the charge pump are controlled to be connected so that the capacitor C100 in the charge pump supplies power to the UWB system-level chip, wherein the capacitor C100 can provide a relatively large current capacity, which not only saves the energy consumed by the vehicle-mounted physical key battery, extends the service life of the vehicle-mounted physical key, but also reduces the heat generated by the vehicle-mounted physical key battery. When the UWB system-level chip is turned on and powered on, positioning and ranging are performed.

[0059] When the positioning and ranging of the UWB system-level chip U200 is completed, a third control signal is sent to the charge pump U300 based on the feedback information received from the UWB system-level chip U200 to control the first terminal and the third terminal in the charge pump U300 to be disconnected, so that the charge pump U300 stops supplying power to the UWB system-level chip U200, and controls the second terminal in the charge pump U300 to be connected to the third terminal and the first terminal, and the button battery J100 charges the charge pump U300 and supplies power to the UWB system-level chip in the standby state.

[0060] The feedback information may refer to information indicating "positioning and ranging completed" fed back by the UWB SoC U200 to the BLE SoC U100 via a software bus protocol or a private protocol. The third control signal may control the charge pump U300 to disconnect the first terminal from the third terminal and switch the connection between the second terminal, the third terminal, and the first terminal.

[0061] In this embodiment, when the UWB system-level chip completes positioning and ranging, the UWB system-level chip will enter a standby state, and the UWB system-level chip will feedback the information of "positioning and ranging completed" to the BLE system-level chip. The BLE system-level chip sends a third control signal to the charge pump based on the received feedback information to control the first terminal and the third terminal in the charge pump to be disconnected, so that the capacitor in the charge pump stops supplying power to the UWB system-level chip. The button battery supplies power to the UWB system-level chip in the standby state with a current of microamperes, and controls the second terminal and the third terminal in the charge pump to be connected. The button battery charges the capacitor in the charge pump with a smaller current, which effectively saves the power consumed by the vehicle physical key battery and extends the service life of the vehicle physical key.

[0062] Optional, such as Figure 1 As shown, the vehicle physical key also includes a key switch B100, which is mainly connected to the BLE system-level chip U100. The key switch B100 can control the vehicle to execute commands such as unlocking or locking, driving, or opening the trunk through the BLE system-level chip U100. Figure 1 As shown, Figure 1 Among them, n6 and n2 can use SPI bus communication mode; n1, n3-n5 can use hard line mode.

[0063] Example 2

[0064] Figure 3 This is a flow chart of a vehicle physical key control method provided in the second embodiment of the present invention. This embodiment is applicable to the case of extending the service life of the vehicle physical key. The method can be executed by the BLE system-level chip in the vehicle physical key. The BLE system-level chip can be implemented in the form of hardware and can be configured in the vehicle physical key. Figure 3 As shown, the method includes:

[0065] S110: Detect the distance between the vehicle-mounted physical key and the vehicle in real time.

[0066] Among them, the on-board physical key may refer to a smart car key with an independent entity; the vehicle may refer to a vehicle paired with the on-board physical key; and the distance may refer to the distance between the vehicle and the on-board physical key.

[0067] Specifically, the distance between the vehicle-mounted physical key and the vehicle can be detected in real time through the BLE system-level chip and the Bluetooth antenna in the vehicle-mounted physical key.

[0068] In this embodiment, when the on-board physical key approaches the vehicle, the vehicle will send a Bluetooth signal; after the BLE system-level chip in the on-board physical key receives the Bluetooth signal through the Bluetooth antenna, the ECU processor on the vehicle side will estimate the distance between the on-board physical key and the vehicle in real time based on the strength and quality of the signal.

[0069] S120 . When the distance reaches a set distance threshold, the UWB system-level chip is controlled to be turned on, and the charge pump is controlled to supply power to the UWB system-level chip, so that the UWB system-level chip is turned on and powered on to perform positioning and ranging.

[0070] The set distance threshold may refer to a pre-set distance threshold, and positioning and ranging are performed if the threshold is reached. A UWB system-on-chip may refer to a chip that integrates key components of UWB technology; UWB technology is a wireless carrier communication technology that does not use a sinusoidal carrier, but instead uses nanosecond-level non-sinusoidal narrow pulses to transmit data, so it occupies a wide spectrum range. UWB technology has the advantages of low system complexity, low power spectrum density of transmitted signals, insensitivity to channel fading, low interception capability, and high positioning accuracy. A charge pump may refer to a switched capacitor voltage converter, which is a DC-DC (converter) that uses so-called "flying" or "pumping" capacitors (rather than inductors or transformers) to store energy; a specific charge pump is a DC-DC converter that uses capacitors as energy storage elements.

[0071] For example, it can be assumed that the pre-set distance threshold is 20m. When the BLE system-level chip detects that the distance between the on-board physical key and the vehicle reaches 20m, the BLE system-level chip can send a control signal to control the UWB system-level chip to turn on, and control the charge pump to power the UWB system-level chip, so that the UWB system-level chip can be turned on and powered on to perform positioning and ranging, thereby obtaining the precise distance between the on-board physical key and the vehicle and the vehicle location information.

[0072] In this embodiment, when the BLE system-level chip in the vehicle physical key detects that the distance between the vehicle physical key and the vehicle reaches a set distance threshold, it can send a first control signal to the UWB system-level chip through SPI bus communication to control the UWB system-level chip to turn on, and send a second control signal to the charge pump to control the charge pump to power the UWB system-level chip, so that the UWB system-level chip can perform positioning and ranging after being turned on and powered on.

[0073] S130 . When the UWB system-level chip positioning and ranging are completed, the charge pump is controlled to stop supplying power to the UWB system-level chip, the UWB system-level chip is in a standby state, and the button battery is controlled to charge the charge pump.

[0074] Specifically, when the UWB system-level chip completes positioning and ranging, the UWB system-level chip enters a standby state, and the UWB system-level chip will feedback the information of "positioning and ranging completed" to the BLE system-level chip. The BLE system-level chip sends a third control signal to the charge pump based on the received feedback information to control the charge pump to stop supplying power to the UWB system-level chip. At this time, the UWB system-level chip is in a standby state, and the button battery can be used to power the UWB system-level chip in the standby state with a current of microamperes. The button battery can also be controlled to charge the capacitor in the charge pump with a smaller current, which effectively saves the energy consumed by the battery of the on-board physical key and extends the service life of the on-board physical key.

[0075] In this embodiment, the distance between the vehicle's physical key and the vehicle is detected in real time. When the distance reaches a set distance threshold, the UWB system-level chip is controlled to turn on, and the charge pump is controlled to power the UWB system-level chip, so that the UWB system-level chip turns on and performs positioning and ranging after power is connected. When the UWB system-level chip completes positioning and ranging, the charge pump is controlled to stop powering the UWB system-level chip. The button battery can be used to power the UWB system-level chip in standby mode, and the button battery is controlled to charge the charge pump. The UWB system-level chip is flexibly controlled to turn on and the charge pump is controlled to power the UWB system-level chip based on the distance threshold. The charge pump can increase the output current to power the UWB system-level chip, solving the problem of the existing technology that the vehicle-mounted physical key battery directly powers the UWB system-level chip, causing the vehicle-mounted physical key battery to consume too quickly and the vehicle-mounted physical key to have a short service life. This extends the service life of the vehicle-mounted physical key and reduces the heat generated by the vehicle-mounted physical key battery.

[0076] Optionally, real-time detection of the distance between the on-board physical key and the vehicle also includes controlling the button battery to continuously charge the charge pump and power the UWB system-level chip in the standby state when the distance does not reach a set distance threshold.

[0077] Specifically, when the distance between the on-board physical key and the vehicle does not reach the set distance threshold, it means that the distance between the on-board physical key and the vehicle is far. At this time, the UWB system-level chip in the on-board physical key has not been turned on and is in standby mode.

[0078] In this embodiment, when the distance does not reach the set distance threshold and the UWB system-level chip is in standby state, the second terminal in the charge pump is connected to the third terminal and the first terminal, that is, the charge pump and the button battery are in a connected state, and the button battery is also connected to the UWB system-level chip in standby state through the charge pump. The button battery can power the UWB system-level chip in standby state with a current of microamperes, and can also charge the charge pump with a smaller current, effectively saving the energy consumed by the vehicle physical key battery and extending the service life of the vehicle physical key.

[0079] In a specific embodiment, Figure 4 This is a complete flow chart of a vehicle-mounted physical key control method provided in the second embodiment of the present invention. Figure 4 As shown, the UWB system-level chip can be flexibly powered by judging whether a ranging positioning event is triggered (i.e., judging whether the ranging positioning conditions are met). The process of determining the object frequency by event frequency clustering can be as follows:

[0080] 1. Start the car with the on-board physical key; specifically, when the on-board physical key is installed with a button battery, the on-board physical key will start the car.

[0081] 2. The vehicle's physical key enters a dormant state. Specifically, the vehicle's physical key enters a dormant state after being started, and the UWB system-level chip in the vehicle's physical key is also in a standby dormant state.

[0082] 3. The button battery charges the charge pump; specifically, when the vehicle physical key is in a dormant state, the button battery provides a small current to charge the charge pump.

[0083] 4. Determine whether a ranging and positioning event is triggered; specifically, whether a ranging and positioning event is triggered can be determined by determining whether the distance between the vehicle's physical key and the vehicle reaches a set distance threshold.

[0084] 5. The charge pump supplies power to the UWB system-level chip. Specifically, when the distance between the vehicle's physical key and the vehicle reaches the set distance threshold, a ranging and positioning event is triggered. The BLE system-level chip in the vehicle's physical key will control the UWB system-level chip to turn on and control the charge pump to supply power to the UWB system-level chip, so that the UWB system-level chip can be turned on and powered on for positioning and ranging.

[0085] 6. Distance measurement and positioning are completed; specifically, when the UWB system-level chip completes the distance measurement and positioning, the vehicle physical key re-enters the sleep state, and the UWB system-level chip also re-enters the standby sleep state. The BLE system-level chip in the vehicle physical key will control the charge pump to stop powering the UWB system-level chip, and the button battery will power the UWB system-level chip in the standby state, and control the button battery to provide a small current to charge the charge pump.

[0086] In this embodiment, after the button battery is installed in the vehicle physical key, the vehicle physical key is activated and enters the dormant state. When the vehicle physical key is in the dormant state, the button battery provides a small current to charge the charge pump. By real-time detection of the distance between the vehicle physical key and the vehicle, it is determined whether a ranging and positioning event is triggered and whether the ranging and positioning conditions are met. When the distance reaches the set distance threshold, a ranging and positioning event is triggered. The BLE system-level chip in the vehicle physical key will control the UWB system-level chip to turn on and control the charge pump to power the UWB system-level chip, so that the UWB system-level chip is turned on and connected to power for positioning and ranging. When the UWB system-level chip positioning and ranging are completed, the vehicle physical key re-enters the dormant state, and the UWB system-level chip also re-enters the standby dormant state. The BLE system-level chip in the vehicle physical key will control the charge pump to stop powering the UWB system-level chip, and the button battery will power the standby UWB system-level chip, and control the button battery to charge the charge pump. The present invention determines whether a ranging and positioning event is triggered and whether the ranging and positioning conditions are met through a distance threshold, flexibly controls the start-up of the UWB system-level chip and controls the charge pump to power the UWB system-level chip, wherein the charge pump can increase the output current to power the UWB system-level chip, thereby solving the problem in the prior art that the vehicle-mounted physical key battery directly powers the UWB system-level chip, resulting in excessively fast power consumption of the vehicle-mounted physical key and too short service life of the vehicle-mounted physical key, thereby extending the service life of the vehicle-mounted physical key and reducing the heat generated by the vehicle-mounted physical key battery.

[0087] Example 3

[0088] In some embodiments, the vehicle-mounted physical key control method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium. In some embodiments, part or all of the computer program may be loaded and / or installed on the vehicle-mounted physical key via a ROM and / or a communication line. When the computer program is loaded into RAM and executed by the BLE system-level chip, one or more steps of the vehicle-mounted physical key control method described above may be performed. Alternatively, in other embodiments, the BLE system-level chip may be configured to execute the vehicle-mounted physical key control method by any other appropriate means (e.g., by means of firmware).

[0089] Various embodiments of the systems and techniques described herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard parts (ASSPs), system on chips (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include being implemented in one or more computer programs that are executable and / or interpreted on a programmable system that includes at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0090] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when the computer program is executed by the processor, the functions / operations specified in the flowcharts and / or block diagrams are implemented. The computer program may be executed entirely on the machine, partially on the machine, as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0091] In the context of the present invention, a computer-readable storage medium stores computer instructions that are used to implement the vehicle-mounted physical key control method provided by the present invention when the processor executes the instructions. The computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by an instruction execution system, device or equipment or used in conjunction with an instruction execution system, device or equipment. The computer-readable storage medium can include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the above. Alternatively, the computer-readable storage medium can be a machine-readable signal medium. More specific examples of machine-readable storage media can include electrical connections based on one or more lines, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROMs), optical storage devices, magnetic storage devices, or any suitable combination of the above.

[0092] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a cathode ray tube (CRT) or a liquid crystal display (LCD monitor)) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0093] The systems and techniques described herein can be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with embodiments of the systems and techniques described herein), or a computing system that includes any combination of such back-end components, middleware components, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0094] A computing system may include a client and a server. The client and server are generally remote from each other and typically interact via a communication network. The client-server relationship arises through computer programs running on the respective computers and establishing a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, a host product within a cloud computing service ecosystem that addresses the management difficulties and limited scalability of traditional physical hosts and virtual private server (VPS) services.

[0095] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0096] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A vehicle-mounted physical key, characterized in that: include: Ultra-wideband UWB system-level chip, charge pump, UWB antenna; the UWB system-level chip is electrically connected to the UWB antenna and the charge pump; The charge pump is used to supply power to the UWB system-level chip so that the UWB system-level chip performs positioning and ranging based on the UWB antenna; When the positioning and ranging of the UWB system-level chip is completed, the charge pump is disconnected from the UWB system-level chip, the charge pump stops supplying power to the UWB system-level chip, and the UWB system-level chip is in a standby state.

2. The vehicle-mounted physical key according to claim 1, characterized in that: The vehicle-mounted physical key also includes: a button battery and a Bluetooth low energy BLE system-level chip. The button battery is electrically connected to the charge pump and the BLE system-level chip, and is used to charge the charge pump, power the BLE system-level chip, and power the UWB system-level chip in standby state.

3. The vehicle-mounted physical key according to claim 2, characterized in that: The charge pump comprises a selection switch, which has three terminals, wherein a first terminal is electrically connected to the UWB system chip, a second terminal is electrically connected to the button battery, and a third terminal is grounded.

4. The vehicle-mounted physical key according to claim 3, characterized in that: The charge pump also includes a capacitor for storing electrical energy when the button battery charges the charge pump.

5. The vehicle-mounted physical key according to claim 1, characterized in that: The vehicle-mounted physical key further includes: a Bluetooth antenna, the BLE system-level chip is electrically connected to the Bluetooth antenna, and the BLE system-level chip detects the distance between the vehicle-mounted physical key and the vehicle based on the Bluetooth antenna.

6. The vehicle-mounted physical key according to any one of claims 1 to 5, characterized in that: When the distance between the on-board physical key and the vehicle does not reach a set distance threshold, the second terminal in the charge pump is connected to the third terminal and the first terminal, and the button battery continues to charge the charge pump and power the UWB system-level chip in standby state.

7. The vehicle-mounted physical key according to any one of claims 1 to 5, characterized in that: The BLE system-level chip is electrically connected to the charge pump and the UWB system-level chip, and the BLE system-level chip is specifically used for: When the distance between the on-board physical key and the vehicle reaches a set distance threshold, a first control signal is sent to the UWB system-level chip to control the UWB system-level chip to turn on, and a second control signal is sent to the charge pump to control the second terminal in the charge pump to be disconnected from the third terminal and the first terminal, so that the button battery stops charging the charge pump and stops supplying power to the UWB system-level chip in the standby state, and controls the first terminal in the charge pump to be connected to the third terminal, so that the charge pump supplies power to the UWB system-level chip; When the positioning and ranging of the UWB system-level chip is completed, a third control signal is sent to the charge pump based on the feedback information received from the UWB system-level chip to control the first terminal in the charge pump to be disconnected from the third terminal so that the charge pump stops supplying power to the UWB system-level chip, and controls the second terminal in the charge pump to be connected to the third terminal and the first terminal, and the button battery charges the charge pump and supplies power to the UWB system-level chip in standby state.

8. A vehicle-mounted physical key control method, characterized in that: The method is applied to the vehicle-mounted physical key according to any one of claims 1 to 7, comprising: Real-time detection of the distance between the vehicle-mounted physical key and the vehicle; When the distance reaches a set distance threshold, the UWB system-level chip is controlled to be turned on, and the charge pump is controlled to supply power to the UWB system-level chip, so that the UWB system-level chip is turned on and powered on to perform positioning and ranging; When the positioning and ranging of the UWB system-level chip is completed, the charge pump is controlled to stop supplying power to the UWB system-level chip, the UWB system-level chip is in a standby state, and the button battery is controlled to charge the charge pump.

9. The method according to claim 8, characterized in that Real-time detection of the distance between the vehicle-mounted physical key and the vehicle, including When the distance does not reach a set distance threshold, the button battery is controlled to continuously charge the charge pump.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the vehicle-mounted physical key control method described in any one of claims 8-9 when executed.

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