EP-4242991-B1 - PORTABLE DEVICE FOR UNLOCKING VEHICLE, METHOD, AND STORAGE MEDIUM

EP4242991B1EP 4242991 B1EP4242991 B1EP 4242991B1EP-4242991-B1

Inventors

HAN, Yiqi
XIAO, BOHONG
LIU, ZHENG
HE, YUNWEI
SHEN, Qizhuang
ZHOU, Tongzhou
WANG, Zihan
WANG, CHENG

Dates

Publication Date: 20260506
Application Date: 20230306

Claims (13)

A portable device for unlocking a vehicle, comprising: a communication unit configured to scan a pairing request signal from the vehicle, and transmit a locking/unlocking signal to the vehicle; and a processing unit configured to: receive a motion status signal indicating a motion status of the portable device and a temperature signal indicating an ambient temperature of the portable device; and switch an operating mode of the portable device based on at least one of the motion status signal and the temperature signal, characterized in that the processing unit is further configured to, when the ambient temperature is lower than a second temperature threshold, switch the portable device to a protective operating mode and perform the following operations: reducing the scanning frequency of the portable device to a first frequency threshold; reducing the transmit power of the portable device to a first power threshold; and increasing the transmit frequency of the portable device to a second frequency threshold.
The device according to claim 1, wherein at least one of the following parameters of the portable device changes when the operating mode is switched: a scanning frequency, a transmit power, a transmit frequency, and an on-off status of each sensor.
The device according to claim 1 or 2, wherein the portable device further comprises at least one of the following: a motion sensor configured to detect the motion status of the portable device; and a temperature sensor configured to detect the ambient temperature of the portable device.
The device according to any one of claims 1 to 3, wherein the processing unit is further configured to switch the portable device to a protective operating mode when the ambient temperature is higher than a first temperature threshold.
The device according to claim 4, wherein the processing unit is further configured to perform at least one of the following operations when the ambient temperature is higher than the first temperature threshold: reducing the scanning frequency of the portable device to a first frequency threshold; and reducing the transmit power of the portable device to a first power threshold.
The device according to any one of claims 4 to 5, wherein the processing unit is further configured to: when the ambient temperature is lower than a third temperature threshold, generate a first command for generating alarm prompt information, wherein the third temperature threshold is lower than or equal to the second temperature threshold.
The device according to any one of claims 1 to 6, wherein the processing unit is further configured to switch the portable device to a deep sleep mode when the motion status signal indicates that the portable device has been in a stationary state for a first time threshold.
The device according to claim 7, wherein in the deep sleep mode, the processing unit is further configured to: reduce the scanning frequency of the portable device to a third frequency threshold; and generate a second command for disabling an ambient temperature detection function.
A control method for a portable device, the portable device being configured to unlock a vehicle, and the method comprising the following steps: A. receiving a motion status signal indicating a motion status of the portable device and a temperature signal indicating an ambient temperature of the portable device; and B. switching an operating mode of the portable device based on at least one of the motion status signal and the temperature signal, characterized in that step B comprises: when the ambient temperature is lower than a second temperature threshold, switching the portable device to a protective operating mode and perform the following operations: reducing the scanning frequency of the portable device to a first frequency threshold; reducing the transmit power of the portable device to a first power threshold; and increasing the transmit frequency of the portable device to a second frequency threshold.
The method according to claim 9, wherein at least one of the following parameters of the portable device changes when the operating mode is switched: a scanning frequency, a transmit power, a transmit frequency, and an on-off status of each sensor.
The method according to claim 9 or 10, wherein step B comprises: B1. switching the portable device to a protective operating mode when the ambient temperature is higher than a first temperature threshold.
The method according to claim 11, wherein in step B1, at least one of the following operations is performed when the ambient temperature is higher than the first temperature threshold: reducing the scanning frequency of the portable device to a first frequency threshold; and reducing the transmit power of the portable device to a first power threshold.
A computer-readable storage medium storing a computer program thereon, wherein the program implements, when executed by a portable device of any one of claims 1-8, a method of any one of claims 9-12.

Description

Technical Field The disclosure relates to the field of vehicles, and more specifically, to a portable device for unlocking a vehicle, a control method for a portable device, and a storage medium. Background Art A passive keyless entry system of a vehicle, that is, a passive entry passive start system of the vehicle, is a vehicle identification code identification system based on a radio frequency technology. With advancement of technology and expansion of automobile markets, an increasing quantity of models are equipped with the system. In a passive keyless entry system of a vehicle, when a smart key enters a range of the system, through direct communication between the smart key and the vehicle, a user may unlock the vehicle without inserting a key into a mechanical lock, and may switch on the ignition after entering the vehicle. The smart key system is convenient and practical, and is currently quite popular. However, a conventional vehicle key and a smart key currently on the market cannot perceive a motion status and an action posture of a vehicle owner, and consequently, often unnecessarily consume power in a carrying process. A key with a low battery may bring a great trouble to use a vehicle in an environment where the vehicle owner leaves the vehicle. Therefore, how to reduce power consumption in conjunction with a real intention of the vehicle owner when the key is idle will be an important issue. In addition, in different environments, a performance parameter of the smart key is greatly affected. For example, a vehicle key often fail in severe winter weather in the north. Because a signal transmitted by the vehicle key cannot be adaptively adjusted according to environmental changes, it is easy to cause failure of unlocking or locking in a scenario of using the vehicle. DE 10 2017 129 058 A1 relates to a wireless key for motor vehicles with a transceiving device for wireless communication with a vehicle control device, a microcontroller and an energy storage unit for supplying the microcontroller and the transceiving device. A movement sensor and a temperature sensor are with the microcontroller coupled. US 2019/0090119 A1 relates to a Bluetooth Low Energy controller that includes a temperature sensor which monitors the ambient temperature periodically. US 2007/268110 A1 relates to a radio monitoring system for equipment or equipment functions and is suitable for use in a passive access system to allow authorised access to a restricted area. Summary According to an aspect of the disclosure, a portable device for unlocking a vehicle is provided, including: a communication unit configured to scan a pairing request signal from the vehicle, and transmit a locking/unlocking signal to the vehicle; and a processing unit configured to: receive a motion status signal indicating a motion status of the portable device and a temperature signal indicating an ambient temperature of the portable device; and switch an operating mode of the portable device based on at least one of the motion status signal and the temperature signal, wherein the processing unit is further configured to, when the ambient temperature is lower than a second temperature threshold, switch the portable device to a protective operating mode and perform the following operations: reducing the scanning frequency of the portable device to a first frequency threshold; reducing the transmit power of the portable device to a first power threshold; and increasing the transmit frequency of the portable device to a second frequency threshold. As an alternative or addition to the above solution, in the device according to an embodiment of the disclosure, at least one of the following parameters of the portable device changes when the operating mode is switched: a scanning frequency, a transmit power, a transmit frequency, and an on-off status of each sensor. As an alternative or addition to the above solution, in the device according to an embodiment of the disclosure, the portable device further includes at least one of the following: a motion sensor configured to detect the motion status of the portable device; and a temperature sensor configured to detect the ambient temperature of the portable device. As an alternative or addition to the above solution, in the device according to an embodiment of the disclosure, the processing unit is further configured to switch the portable device to a protective operating mode when the ambient temperature is higher than a first temperature threshold. As an alternative or addition to the above solution, in the device according to an embodiment of the disclosure, the processing unit is further configured to perform at least one of the following operations when the ambient temperature is higher than the first temperature threshold: reducing the scanning frequency of the portable device to a first frequency threshold; and reducing the transmit power of the portable device to a first power threshold. As an alterna