TWI873492B - Vehicle control system and vehicle control method - Google Patents

Abstract

A vehicle control system and vehicle control method are provided. The vehicle control system includes a power module and a vehicle detecting device. The power module has a power signal. The vehicle detecting device includes a controller and a monitoring module. The controller is coupled to the power module via a power cable to receive the power signal. The controller determines that the vehicle detecting device operates in a first mode or a second mode according to the power signal, to enable the monitoring module.

Description

Vehicle control system and vehicle control method

The present invention relates to a control system, and more particularly to a vehicle control system and a vehicle control method.

Cars or heavy motorcycles can be connected to additional electronic devices (such as dashcams). Generally speaking, dashcams can be connected to a cigarette lighter interface or a normal power interface to obtain power. However, when the vehicle is turned off, for dashcams connected to the cigarette lighter interface, the power supply is cut off, causing the dashcam to be unable to achieve parking monitoring. For dashcams connected to the normal power interface, the dashcam can still obtain power, but parking monitoring will consume too much power and cause the battery to run out of power.

The embodiment of the present invention provides a vehicle control system that can perform parking monitoring in a low power consumption manner when the vehicle is turned off.

The vehicle control system of the embodiment of the present invention includes a power module and a vehicle detection device. The power module has a power signal. The vehicle detection device includes a first controller and a monitoring module. The first controller is coupled to the power module through a power cable to receive the power signal. The first controller determines whether the vehicle detection device operates in the first mode or the second mode according to the power signal, so as to enable the monitoring module.

The embodiment of the present invention also provides a vehicle control method. The vehicle control method includes the following steps. A power signal of a power module is transmitted through a power cable. The vehicle detection device is determined to operate in a first mode or a second mode according to the power signal, wherein the vehicle detection device is coupled to the power cable and includes a monitoring module. In the first mode, the monitoring module is enabled. In the second mode, the monitoring module is enabled.

Based on the above, the vehicle control system and vehicle control method of the embodiment of the present invention can transmit a power signal through a power cable, and switch the operation mode of the vehicle detection device according to the power signal, and enable the monitoring module in each operation mode. In this way, the vehicle detection device can be easily installed in the vehicle, and operate in different operation modes according to the state of the vehicle to reduce power consumption, and the monitoring module can monitor at any time.

In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below and described in detail with reference to the accompanying drawings.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. When the same element symbols appear in different drawings, they will be regarded as the same or similar elements. These embodiments are only part of the present invention and do not disclose all possible implementations of the present invention. More precisely, these embodiments are only examples within the scope of the patent application of the present invention.

FIG. 1 is a circuit block diagram of a vehicle control system according to an embodiment of the present invention. Referring to FIG. 1 , the vehicle control system 100 may be applicable to vehicles such as automobiles or heavy motorcycles. In this embodiment, the vehicle control system 100 may include a power module 110, a vehicle detection device 120, and a power cable 130. The power module 110 may be coupled to the vehicle detection device 120 via the power cable 130.

In this embodiment, the power module 110 has a power signal VBAT to provide power to the vehicle and/or the vehicle detection device 120. The power module 110 may be, for example, a storage battery module. The power module 110 may include a lead storage battery.

In this embodiment, the power cable 130 can transmit the power signal VBAT. In some embodiments, the power cable 130 can also transmit the status signal of the vehicle (such as the status signal VST shown in FIG. 3 ). The power cable 130 can be, for example, an On-Board Diagnostics (OBD-II) cable. The power cable 130 can transmit a signal that complies with the OBD-II communication protocol, such as a signal of the Controller Area Network (CANBUS) communication protocol. In some embodiments, the power cable 130 can be, for example, a J1939 cable to transmit a signal that complies with the J1939 communication protocol.

In the present embodiment, the vehicle detection device 120 is detachably connected to the power cable 130, or is detachably connected to the power module 110 together with the power cable 130. The vehicle detection device 120 can operate based on the power signal VBAT. The vehicle detection device 120 can be, for example, a dash cam. In the present embodiment, the vehicle detection device 120 can include a first controller 121, a monitoring module 122, a first operating module 123, and a second operating module 124. The first controller 121 is coupled to the monitoring module 122, the first operating module 123, and the second operating module 124. The first controller 121 can be coupled to the power module 110 via the power cable 130 to receive the power signal VBAT to receive the power provided to the vehicle detection device 120 .

In this embodiment, the first controller 121 can also process the power signal VBAT to convert the power signal VBAT from an analog signal to a digital signal and obtain the voltage value of the power signal VBAT. The first controller 121 can also control the operation of each module (such as the monitoring module 122) in the vehicle detection device 120. The first controller 121 may be, for example, a signal converter, a field programmable gate array (FPGA), a central processing unit (CPU), or other programmable general-purpose or special-purpose microprocessor, digital signal processor (DSP), programmable controller, application specific integrated circuits (ASIC), programmable logic device (PLD) or other similar devices or a combination of these devices, which can load and execute relevant firmware or software to implement control functions.

In this embodiment, the monitoring module 122 can monitor events around the vehicle and/or the vehicle itself to achieve the monitoring function. The monitoring module 122 can be, for example, a micro camera, and includes a camera and a memory. The camera can record images of the environment in which the vehicle is located (for example, photos, videos, or time-lapsed videos). The memory can store user interfaces (UI), firmware or software, program codes, and the aforementioned images related to the operation of the vehicle detection device 120. In this embodiment, the memory may be, for example, a dynamic random access memory (DRAM), a flash memory, or a non-volatile random access memory (NVRAM). In some embodiments, the monitoring module 122 may further include a sensor. The sensor may sense the surroundings of the vehicle to sense whether an object passes by or hits the vehicle.

FIG2 is a flow chart of a vehicle control method according to an embodiment of the present invention. Referring to FIG1 and FIG2 , the vehicle control system 100 may execute the following steps S210 to S240 to control the operation of the vehicle detection device 120. In this embodiment, steps S210 to S240 may be applied to the following exemplary situations.

When the vehicle is parked, the vehicle gear is locked. At this time, the power module 110 stops supplying power to the vehicle engine and accessory devices such as windows and radios. The voltage value of the power signal VBAT may be within a first range, and the vehicle detection device 120 may operate in a first mode.

When the vehicle is in a ready-to-start state or a ready-to-park state, the vehicle gear position of the vehicle is the accessory power position (ACC). At this time, the power module 110 can provide power to all or part of the accessory devices, and the engine is turned off. The voltage value of the power signal VBAT can be within the second range or the third range, and the vehicle detection device 120 can operate in the first mode.

When the vehicle is ready to start, the vehicle gear is switched from the accessory power-on gear to the start gear (START). At this time, the voltage value of the power signal VBAT may have a magnitude change (e.g., a sudden drop). Then, the vehicle gear is switched from the start gear to the on gear (ON). The power module 110 may start to provide power to the engine and all accessory devices, and the engine is started. The voltage value of the power signal VBAT may be within the third range, and the vehicle detection device 120 may operate in the second mode.

When the vehicle is in the starting (or switched on) state, the vehicle gear position of the vehicle is the switched on gear. At this time, the power module 110 can provide power to the engine and all accessory devices, and the engine is started. The voltage value of the power signal VBAT can be within the fourth range, and the vehicle detection device 120 can operate in the second mode.

In step S210, the power signal VBAT of the power module 110 is transmitted to the first controller 121 of the vehicle detection device 120 through the power cable 130 to provide power to the vehicle detection device 120. In other words, the first controller 121 can obtain the voltage value of the power signal VBAT at any time.

In step S220, the first controller 121 determines whether the vehicle detection device 120 operates in the first mode or the second mode according to the power signal VBAT. Since the voltage value of the power signal VBAT can correspond to different states of the vehicle (parking state, waiting to start state, waiting to park state, ready to start state or starting state), the first controller 121 can switch the operation mode of the vehicle detection device 120 according to the state of the vehicle.

In step S230, when the vehicle detection device 120 operates in the first mode, the monitoring module 122 is enabled through the first controller 121, and at least one of the first operation module 123 and the second operation module 124 is disabled. That is, when the voltage value of the power signal VBAT is within the first range (corresponding to the parking state) or within the second range (corresponding to the waiting state), the vehicle detection device 120 has the first power consumption and operates in the first mode, and the monitoring module 122 is enabled to perform monitoring when the engine is not started.

In step S240, when the vehicle detection device 120 operates in the second mode, the monitoring module 122 is enabled through the first controller 121, and the first operation module 123 and the second operation module 124 are enabled. That is, when the voltage value of the power signal VBAT is within the third range (corresponding to the ready-to-start state) or within the fourth range (corresponding to the start state), the vehicle detection device 120 has the second power consumption and operates in the second mode, and the monitoring module 122 is enabled to monitor when the engine is started.

It is worth mentioning that the first controller 121 can enable the monitoring module 122 in each operation mode, so that the monitoring module 122 can monitor at any time. Since the power consumption of the monitoring module 122 is extremely low, even if the vehicle is parked, the vehicle detection device 120 can perform parking monitoring in a low power consumption (i.e., first power consumption) manner to avoid the power of the power module 110 being consumed too much or too quickly and being unable to start the vehicle, and can reduce power consumption. On the other hand, the vehicle detection device 120 can control the operation mode by itself, without the need for an additional control box or switch, and can be easily installed in the vehicle by connecting the power cable 130.

FIG3 is a circuit block diagram of a vehicle control system according to an embodiment of the present invention. Referring to FIG3 , the vehicle control system 300 may include a power module 310, a vehicle detection device 320, and a power cable 330. The vehicle detection device 320 includes a first controller 321, a monitoring module 322, a first operating module 323, and a second operating module 324. The vehicle control system 300, the power module 310, the vehicle detection device 320, the first controller 321, the monitoring module 322, and the power cable 330 shown in FIG3 may refer to the relevant description of the vehicle control system 100 shown in FIG1 and be deduced by analogy, and will not be repeated here.

In this embodiment, the first operation module 323 and the second operation module 324 are respectively coupled to the first controller 321. The first operation module 323 can be controlled by the first controller 321 to be disabled in the first mode and enabled in the second mode. The first operation module 323 can be, for example, a single chip system (System on a Chip, SOC) related to the operation of the vehicle detection device 320. In some embodiments, the first operation module 323 can be enabled in the first mode through the first controller 121.

In this embodiment, the second operation module 324 may be controlled by the first controller 321 to be enabled in the first mode and enabled in the second mode. The second operation module 324 may be, for example, a real-time clock (RTC) circuit related to the operation of the vehicle detection device 320. In some embodiments, the second operation module 324 may be disabled in the first mode through the first controller 321.

In the embodiment shown in FIG3 , the power module 310 may include a second controller 311 , an on-vehicle diagnostic socket 312 , and a battery 313 . The on-vehicle diagnostic socket 312 is coupled to the battery 313 and the second controller 311 .

In this embodiment, the battery 313 can generate a power signal VBAT. The battery 313 can be, for example, a lead storage battery.

In this embodiment, the second controller 311 can generate the state signal VST according to the vehicle gear position of the vehicle. The aforementioned vehicle gear position includes a lock gear (Lock), an accessory power gear (ACC), an on gear (ON) and a start gear (START). The second controller 311 may be, for example, a signal converter, a field programmable gate array (FPGA), a central processing unit (CPU), or other programmable general-purpose or special-purpose microprocessor, digital signal processor (DSP), programmable controller, application specific integrated circuits (ASIC), programmable logic device (PLD) or other similar devices or a combination of these devices, which can load and execute relevant firmware or software to control the power module 310.

In this embodiment, the on-vehicle diagnostic socket 312 is also connected to the power cable 330 to output the power signal VBAT and the status signal VST to the first controller 321. The on-vehicle diagnostic socket 312 may be, for example, an OBD-II socket.

In this embodiment, the first controller 321 can make the vehicle detection device 320 operate in the first mode according to the power signal VBAT, and can determine whether to disable at least one of the first operation module 323 and the second operation module 324 in the first mode according to the status signal VST. That is, in the first mode, the first controller 321 can enable the monitoring module 322 to perform monitoring, and disable at least one of the first operation module 323 and the second operation module 324 to reduce power consumption.

On the other hand, the first controller 321 can operate the vehicle detection device 320 in the second mode according to the power signal VBAT, so that the monitoring module 322, the first operation module 323 and the second operation module 324 can enable all functions of the vehicle detection device 320 when the vehicle is in the ready-to-start or starting state.

It should be noted that both the power signal VBAT and the status signal VST can be transmitted in the power cable 330 to provide power and vehicle status information to the vehicle detection device 320. Therefore, the vehicle control system 300 does not need to be additionally configured with a signal line for transmitting the status signal VST, nor does it need to be additionally configured with a power switch or a power controller, and can obtain the power signal VBAT and the status signal VST through the power cable 330 to control the operation mode by itself.

FIG. 4 is a flow chart of the vehicle control method according to the embodiment of FIG. 3 of the present invention. FIG. 5 is a schematic diagram of the operation of the vehicle control system according to the embodiment of FIG. 3 of the present invention. In FIG. 5, the horizontal axis is the operation time of the vehicle control system, and the vertical axis is the voltage value. Referring to FIG. 3 to FIG. 5 at the same time, the vehicle control system 300 can execute the following steps S410~S490 to control the operation of the vehicle detection device 320.

In step S410, when the vehicle is in a parked state or in a waiting state, the vehicle detection device 320 operates in a first mode and performs parking monitoring in a low power consumption manner.

Specifically, when the vehicle is in a parked state, the vehicle gear is the lock gear ST_LOCK. During this period (i.e., time t1 to t2), the state signal VST has a first voltage value V1, and the voltage value of the power signal VBAT is a first value (e.g., in the range of 12.4 volts (V) to 12.8V). When the vehicle switches from the parked state to the ready-to-start state, the vehicle gear switches from the lock gear ST_LOCK to the accessory power gear ST_ACC. At this time (i.e., time t2), the state signal VST generates a falling edge, and the power signal VBAT decreases slightly. When the vehicle is in the ready-to-start state, the vehicle gear is the accessory power gear ST_ACC. During this period (i.e., time t2 to t3), the state signal VST has a second voltage value V2, and the voltage value of the power signal VBAT is a second value (e.g., in the range of 11.9V to 12.5V). In this embodiment, the first value of the power signal VBAT is higher than the second value. The first value and the second value of the power signal VBAT are respectively higher than the first threshold Valid_THR.

In step S420, in the first mode, the first controller 321 determines whether the voltage value of the power signal VBAT is greater than or equal to the first threshold Valid_THR. If the result of step S420 is no, the vehicle control system 300 re-executes step S410 to maintain operation in the first mode. Otherwise, the vehicle control system 300 executes step S430 to further determine whether the vehicle is ready to start.

When the vehicle is ready to start, the gear of the vehicle is switched from the accessory power-on gear ST_ACC to the start gear ST_START. During this period (i.e., time t3 to t4), the state signal VST has a second voltage value V2. The voltage value of the power signal VBAT has an event E1 in the early stage of this period and suddenly drops, then rises rapidly, and has an event E2 in the later stage of this period and is greater than the second threshold Poweron_THR. Then (i.e., time t4), the gear of the vehicle is switched from the start gear ST_START to the on gear ST_ON to complete the start.

In step S430, in the first mode, when the voltage value of the power signal VBAT is greater than or equal to the first threshold Valid_THR, the first controller 321 determines whether the voltage value of the power signal VBAT has a change in amplitude (e.g., a sudden drop of event E1) during the first period (i.e., the early period of time t3 to t4) and is greater than the second threshold Poweron_THR during the second period (i.e., the late period of time t3 to t4), so as to determine whether to switch the vehicle detection device 320 to the second mode. If the result of step S430 is no, the vehicle control system 300 re-executes step S410 to maintain operation in the first mode. Otherwise, it means that the vehicle is ready to start and will enter the starting state, and the vehicle control system 300 executes step S440.

In step S440, when the vehicle is in the starting state, the vehicle detection device 320 operates in the second mode and performs parking monitoring in a normal working manner.

Specifically, when the vehicle is in the starting state, the vehicle gear is the on gear ST_ON. During this period (i.e., time t4 to t5), the state signal VST has a second voltage value V2, and the voltage value of the power signal VBAT is a third value (e.g., in the range of 13.2 volts (V) to 13.8 V). In this embodiment, the third value of the power signal VBAT is higher than the second threshold Poweron_THR.

In step S450, in the second mode, the first controller 321 determines whether the voltage value of the power signal VBAT is less than the third threshold Off_THR. If the result of step S450 is no, the vehicle control system 300 re-executes step S450 to maintain operation in the second mode. Otherwise, the vehicle control system 300 executes step S460 to further determine whether the vehicle enters the waiting parking state.

When the vehicle switches from the start state to the parking state, the vehicle gear is switched from the on gear ST_ON to the accessory power gear ST_ACC. At this time (i.e., time t5), the state signal VST has the second voltage value V2, and the voltage value of the power signal VBAT begins to decrease. When the vehicle is in the parking state, the vehicle gear is the accessory power gear ST_ACC. During this period (i.e., time t5 to t6), the state signal VST has the second voltage value V2, and the voltage value of the power signal VBAT has event E3 and is less than the third threshold value Off_THR.

In step S460, in the second mode, when the voltage value of the power signal VBAT is less than the third threshold value Off_THR, the first controller 321 determines whether the voltage value of the power signal VBAT is less than or equal to the fourth threshold value Low_THR to determine whether to switch the vehicle detection device 320 to the first mode. If the result of step S460 is yes, it means that the vehicle will enter the power module 310 under-powered state, and the vehicle control system 300 executes step S470. Otherwise, the vehicle control system 300 executes step S480 to further clarify whether the vehicle will actually enter the parking state.

When the vehicle returns to the parking state, the vehicle gear is switched from the accessory power-on gear ST_ACC to the lock gear ST_LOCK. At this time (i.e., time t6), the state signal VST generates a rising edge, and the voltage value of the power signal VBAT is the fourth value. Then, when the vehicle is in the parking state, the vehicle gear is the lock gear ST_LOCK. During this period (i.e., after time t6), the state signal VST has the first voltage value V1, and the voltage value of the power signal VBAT has an event E4 and is less than or equal to the fourth threshold value Low_THR.

In step S470, in the second mode, when the voltage value of the power signal VBAT is less than or equal to the fourth threshold Low_THR, the first controller 321 disables the first operation module 323 and the second operation module 324, and enables the monitoring module 322. Then, the vehicle control system 300 re-executes step S410 to switch the vehicle detection device 300 to the first mode.

In step S480, in the second mode, when the voltage value of the power signal VBAT is not less than or equal to the fourth threshold value Low_THR, the first controller 321 determines whether the voltage value of the state signal VST is the first voltage value V1 to determine whether the vehicle is in a parking state or a temporary parking state and decides whether to switch the vehicle detection device 300 to the first mode. If the result of step S480 is no, it means that the vehicle is not really in a parking state (for example, it is a temporary parking state), and the vehicle control system 300 re-executes step S450 to maintain operation in the second mode. On the contrary, it means that the vehicle is really in a parking state, and the vehicle control system 300 executes step S490.

In step S490, in the second mode, when the voltage value of the status signal VST is the first voltage value V1, the first operating module 323 is disabled through the first controller 321, and the second operating module 324 and the monitoring module 322 are enabled. Then, in step S491, it is determined whether the voltage value of the power signal VBAT is less than or equal to the fourth threshold Low_THR. If the result of step S491 is no, the vehicle control system 300 re-executes step S491 to continue the determination. If the result of step S491 is yes, it indicates that the vehicle enters the power module 310 under-powered state, and the vehicle control system 300 executes step S470. Then, the vehicle control system 300 re-executes step S410 to switch the vehicle detection device 300 to the first mode.

In the present embodiment, the first threshold Valid_THR may be, for example, 12.2 V. The second threshold Poweron_THR may be, for example, 13.2 V. The third threshold Off_THR may be, for example, 13.0 V. The fourth threshold Low_THR may be, for example, 11.6 V. The voltage value of the power signal VBAT, the voltage value of the state signal VST, and the respective values of the above-mentioned multiple thresholds Valid_THR, Poweron_THR, Off_THR, and Low_THR are merely examples and are not limited thereto.

Fig. 6 is a schematic diagram of the on-vehicle diagnostic socket according to the embodiment of Fig. 3 of the present invention. The on-vehicle diagnostic socket 612 shown in Fig. 6 can refer to the relevant description of the on-vehicle diagnostic socket 312 shown in Fig. 3 and be deduced by analogy, which will not be repeated here.

In the embodiment shown in FIG6 , the connector of the on-vehicle diagnostic socket 612 includes a plurality of pins P1 to P16. These pins P1 to P16 can transmit signals that comply with the OBD-II communication protocol. For example, pin P5 can transmit a ground signal. Pin P16 can transmit a power signal VBAT. Pins P6 and P14 can transmit CANBUS signals. Pin P13 can transmit a status signal VST.

In summary, the vehicle control system and vehicle control method of the embodiments of the present invention can enable the vehicle detection device to operate in different operation modes to reduce power consumption, and can monitor at any time in each operation mode through the enabled monitoring module, without causing the battery to run out of power when performing parking monitoring. In addition, the vehicle detection device can be connected to the power module through the OBD-II cable, which has a simple installation method. In some embodiments, the vehicle detection device assists in judging the state of the vehicle according to the state signal to switch the operation mode, which can improve the accuracy of control.

Although the present invention has been disclosed as above by the embodiments, they are not intended to limit the present invention. Any person with ordinary knowledge in the relevant technical field can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be defined by the scope of the attached patent application.

100, 300: vehicle control system 110, 310: power module 120, 320: vehicle detection device 121, 321: first controller 122, 322: monitoring module 123, 323: first operation module 124, 324: second operation module 130, 330: power cable 311: second controller 312, 612: vehicle diagnostic socket 313: battery E1~E4: event Low_THR: fourth threshold Off_THR: third threshold P1~P16: pin Poweron_THR: second threshold S210~S240, S410~S491: step ST_ACC: accessory power-on file ST_LOCK: lock position ST_ON: on position ST_START: start position t1~t6: time V1: first voltage value V2: second voltage value Valid_THR: first threshold value VBAT: power signal VST: status signal

FIG. 1 is a circuit block diagram of a vehicle control system according to an embodiment of the present invention. FIG. 2 is a flow chart of a vehicle control method according to an embodiment of the present invention. FIG. 3 is a circuit block diagram of a vehicle control system according to an embodiment of the present invention. FIG. 4 is a flow chart of a vehicle control method according to the embodiment of FIG. 3 of the present invention. FIG. 5 is an action diagram of a vehicle control system according to the embodiment of FIG. 3 of the present invention. FIG. 6 is a diagram of a vehicle diagnostic socket according to the embodiment of FIG. 3 of the present invention.

100: Automotive control system

110: Power module

120: Vehicle detection device

121: First controller

122: Monitoring module

123: First operation module

124: Second operation module

130: Power cable

VBAT: power signal

Claims (22)

A vehicle control system includes: a power module having a power signal; and a vehicle detection device including a first controller, a monitoring module, a first operation module and a second operation module, wherein the first controller is coupled to the power module via a power cable to receive the power signal to receive the power provided to the vehicle detection device, and the monitoring module monitors events around a vehicle or the vehicle itself, wherein the first controller determines whether the vehicle detection device operates in a first mode or a second mode according to the power signal to enable the monitoring module, wherein in the first mode, the first controller disables at least one of the first operation module and the second operation module, and in the second mode, the first controller enables the first operation module and the second operation module. A vehicle control system as described in claim 1, wherein the power cable is an On-Board Diagnostics (OBD-II) cable. The vehicle control system as described in claim 1, wherein the power module includes: a battery, generating the power signal; a second controller, generating a status signal according to a vehicle gear position; and an on-vehicle diagnostic socket, coupling the battery and the second controller, and connecting the power cable to output the power signal and the status signal to the first controller. A vehicle control system as described in claim 3, wherein the first controller determines whether to disable at least one of the first operating module and the second operating module in the first mode based on the status signal. A vehicle control system as described in claim 1, wherein in the first mode, the first controller determines whether the voltage value of the power signal is greater than or equal to a first threshold. A vehicle control system as described in claim 5, wherein in the first mode, when the voltage value of the power signal is greater than or equal to the first threshold, the first controller determines whether the voltage value of the power signal has an amplitude change during a first period and is greater than a second threshold during a second period, so as to determine whether to switch the vehicle detection device to the second mode. A vehicle control system as described in claim 1, wherein in the second mode, the first controller determines whether the voltage value of the power signal is less than a third threshold value. A vehicle control system as described in claim 7, wherein in the second mode, when the voltage value of the power signal is less than the third threshold, the first controller determines whether the voltage value of the power signal is less than or equal to a fourth threshold to determine whether to switch the vehicle detection device to the first mode. A vehicle control system as described in claim 8, wherein in the second mode, when the voltage value of the power signal is less than or equal to the fourth threshold, the first controller disables the first operation module and the second operation module, and enables the monitoring module to switch the vehicle detection device to the first mode. A vehicle control system as described in claim 8, wherein in the second mode, when the voltage value of the power signal is not less than or equal to the fourth threshold, the first controller determines whether the voltage value of a state signal of the power module is a first voltage value to determine whether to switch the vehicle detection device to the first mode. A vehicle control system as described in claim 10, wherein in the second mode, when the voltage value of the status signal is the first voltage value, the first controller disables the first operation module and enables the second operation module and the monitoring module to switch the vehicle detection device to the first mode. A vehicle control method includes: Transmitting a power signal of a power module through a power cable to provide power to a vehicle detection device; Determining whether the vehicle detection device operates in a first mode or a second mode according to the power signal, wherein the vehicle detection device is coupled to the power cable and includes a monitoring module to monitor events around a vehicle or the vehicle itself; In the first mode, enabling the monitoring module and disabling at least one of a first operating module and a second operating module of the vehicle detection device; and In the second mode, enabling the monitoring module, enabling the first operating module and the second operating module. A vehicle control method as described in claim 12, wherein the power cable is an On-Board Diagnostics (OBD-II) cable. The vehicle control method as described in claim 12 further includes: Generating a status signal according to a vehicle gear position; Transmitting the status signal through the power cable. The vehicle control method as described in claim 14 further includes: Determining whether to disable at least one of the first operating module and the second operating module in the first mode according to the state signal. The vehicle control method as described in claim 12 further includes: In the first mode, determining whether the voltage value of the power signal is greater than or equal to a first threshold value. The vehicle control method as described in claim 16 further includes: In the first mode, when the voltage value of the power signal is greater than or equal to the first threshold value, it is determined whether the voltage value of the power signal has an amplitude change in a first period and is greater than a second threshold value in a second period, so as to determine whether to switch the vehicle detection device to the second mode. The vehicle control method as described in claim 12 further includes: In the second mode, determining whether the voltage value of the power signal is less than a third threshold value. The vehicle control method as described in claim 18 further includes: In the second mode, when the voltage value of the power signal is less than the third threshold value, determining whether the voltage value of the power signal is less than or equal to a fourth threshold value to determine whether to switch the vehicle detection device to the first mode. The vehicle control method as described in claim 19 further includes: In the second mode, when the voltage value of the power signal is less than or equal to the fourth threshold value, the first operation module and the second operation module are disabled, and the monitoring module is enabled to switch the vehicle detection device to the first mode. The vehicle control method as described in claim 19 further includes: In the second mode, when the voltage value of the power signal is not less than or equal to the fourth threshold value, determining whether the voltage value of a state signal of the power module is a first voltage value to determine whether to switch the vehicle detection device to the first mode. The vehicle control method as described in claim 21 further includes: In the second mode, when the voltage value of the status signal is the first voltage value, the first operation module is disabled, and the second operation module and the monitoring module are enabled to switch the vehicle detection device to the first mode.

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