TWI673675B - A system and calibration method of setting accelerometer and gyroscope to vehicle - Google Patents

Abstract

The invention discloses a system and a calibration method for installing an accelerometer and a gyroscope on a vehicle device. The system and a calibration method are composed of a smart phone, an accelerometer, a gyroscope, and a vehicle-mounted device. Among them, the acceleration mounted on a vehicle is used by the smart phone Taking into account the gyroscope for fast installation and calibration, under normal circumstances, the installer operates the smart phone and connects to the vehicle device via the Bluetooth connection to achieve the function of quick calibration and installation of the accelerometer and gyroscope. Through the system and calibration method for installing an accelerometer and a gyroscope in a vehicle device of the present invention, an installer can correctly and appropriately install the accelerometer and the gyroscope in a proper position on a vehicle, and can perform rapid equipment calibration and use. Provide efficient and convenient installation to achieve the safe use of vehicle condition detection and management.

Description

System and calibration method for installing accelerometer and gyroscope in vehicle device

The present invention relates to a device installation and calibration of a vehicle device, and more particularly, to a system and a calibration method for installing an accelerometer and a gyroscope on a vehicle device.

At present, when tools are used to install accelerometers and gyroscopes in automotive devices, manual calibration equipment is usually required, which has a significant impact on the purpose of installing at precise angles. Specifically, automotive devices can be connected through long-distance wireless networks. (GPRS, 3G / HSDPA, WiMax, 4G / LTE) connection to the background, detection by the background, then initialization and parameter calibration for the accelerometer and gyroscope, and manual calibration by the installer, but this method is easy because Network communication conditions affect calibration time and accuracy.

As mentioned above, the method of installing the accelerometer and gyroscope on the vehicle device still requires user intervention or the device initialization and parameter calibration of the accelerometer and gyroscope can only be performed remotely. This may have a calibration time. Disadvantages affected by network problems. In addition, the installer must also carry a laptop or tablet with him, which also causes inconvenience to the installer. Consider today ’s wisdom In the case of universal use of mobile phones, it is not good to set up through the connection background and the installer through a laptop or tablet. How to effectively improve the installation of accelerometers and gyroscopes and consider the convenience of calibration, it becomes equally important. .

It can be known from the above that if a method for installing and calibrating a vehicle device can be found, for example, a portable device can be used to improve the shortcomings of the conventional remote device for accelerometer and gyroscope initialization and parameter correction, which will become the current Those skilled in the art are eager to solve the technical problems.

The purpose of the present invention is to achieve the purpose of correctly installing an accelerometer and a gyroscope on a vehicle-mounted device only through a smart phone through simple settings, so that the detection and safety management of the vehicle state is simpler. It is applied to the vehicle's active and safe front-loading business in the depot to achieve the purpose of simple control and save operating manpower.

In order to achieve the above or other objectives, the present invention proposes a system for installing an accelerometer and a gyroscope on a vehicle device, which includes: a vehicle state detection device, which is arranged in a vehicle and used to collect vehicle state information of the vehicle To obtain the vehicle acceleration value and the angular velocity value; a vehicle-mounted device is provided in the vehicle for receiving the vehicle acceleration value and the angular velocity value from the vehicle state detection device to analyze and calculate the vehicle acceleration value and The angular velocity value is used to obtain a vehicle speed value and a rotation angle value, and a correction message is generated when the vehicle speed value and the rotation angle value exceed a set value and a preset offset angular velocity value, respectively; a handheld communication device, which passes the vehicle Connect to the vehicle-mounted device under the identity of the device to provide users with The handheld communication device controls the vehicle-mounted device to install and calibrate the accelerometer and gyroscope, wherein the handheld communication device transmits remote management information to the vehicle-mounted device through a long-distance wireless communication network and through a short distance The wireless communication network performs transmission of the handshake message and the calibration message with the vehicle-mounted device.

In an embodiment, the vehicle-mounted device is used to determine whether the vehicle speed value exceeds the set value, so that when the set value is exceeded, the handheld communication device is notified via the short-range wireless communication network to perform the accelerometer parameters and Calibration of hardware equipment, and judging whether the gyroscope installed in the vehicle exceeds the preset offset angular velocity value, so that when the offset angular velocity value is exceeded, the hand-held communication device is notified via the short-range wireless communication network to perform Calibration of the gyroscope parameters and hardware equipment.

In another embodiment, the vehicle-mounted device includes a long-range wireless communication module, a short-range Bluetooth communication interface, and a wired transmission interface, and the wired transmission interface is used to connect with the vehicle status detection device.

In yet another embodiment, the vehicle state detection device includes the accelerometer, the gyroscope, and a wired transmission interface. The wired transmission interface is used to connect with the vehicle-mounted device, and the accelerometer and the gyroscope are used to obtain the Vehicle status information.

In yet another embodiment, the handheld communication device includes a Bluetooth communication interface, a mobile communication network, and a positioning unit. The Bluetooth communication interface is used for short-distance connection with the vehicle-mounted device, and the mobile communication network is used for communication with the vehicle-mounted device. The long-distance connection, as well as the mobile communication network and the positioning unit, are used for authentication / setting, emergency connection and correction function activation with the vehicle-mounted device. In addition, The positioning unit uses GPS, AGPS, Wifi, or Cell ID for positioning.

In one embodiment, the vehicle-mounted device is a car computer, an external host, a tablet computer, or a smart phone. The long-distance wireless communication network is GPRS, 3G / HSDPA, WiMax, or 4G / LTE, and the short-distance wireless communication network. The road is Bluetooth communication.

In addition, the vehicle state detection device can be integrated into the vehicle-mounted device.

The invention further proposes a calibration method for installing an accelerometer and a gyroscope on a vehicle device. The calibration method includes: connecting a handheld communication device with an on-board device after identification, and enabling the vehicle state detection device to obtain vehicle state information of the vehicle to Transmit to the vehicle-mounted device; cause the vehicle-mounted device to analyze and calculate the vehicle state information to obtain the vehicle speed value and rotation angle value of the vehicle; and cause the vehicle-mounted device to determine whether the vehicle speed value and the rotation angle value exceed a set value and A preset offset angular velocity value, so that when the rotation angle value exceeds the set value or the rotation angle value exceeds the preset offset angular velocity value, the handheld communication device is notified via a short-range wireless communication network to perform accelerometer parameters and hardening. Calibration of body equipment or gyroscope parameters and calibration of hardware equipment.

In addition, the vehicle state information includes a three-axis angular velocity value and a three-axis acceleration value, and the three-axis angular velocity value and the three-axis acceleration value are transmitted to a central processor of the vehicle-mounted device for calculation to obtain the vehicle speed value and the rotation angle value. It is stored in the memory of the vehicle-mounted device to perform the installation and calibration of the accelerometer and the gyroscope when the vehicle speed value and the rotation angle value exceed the set value and the preset offset angular speed value.

Compared with the prior art, the purpose of the present invention is to install an accelerometer and a gyroscope on a vehicle device using a handheld communication device such as a smart phone. The system is composed of a smartphone, an accelerometer, a gyroscope, and a vehicle device. The front-end installation business or vehicle management system used in a car factory needs to add a remote servo device. Specifically, a smart phone that allows accelerometers and gyroscopes to be stored in the vehicle device can use one of the door address / IMSI code / IMEI code / Bluetooth device's MAC address as an identification to control the vehicle device. For the use object, the in-vehicle device can have a long-range wireless (3G / HSDPA, 4G / LTE) communication function to perform a correction data return function. In addition, when a smartphone is installed with an accelerometer and a gyroscope on a car device, it will be connected and started to install the interface according to the Bluetooth communication interface signal of the user's smartphone. The car device is connected to the smartphone for the first time. When the line is online, the device calibration operation interface will be activated immediately, and the Bluetooth signal strength of the connected smartphone is detected at any time. When the vehicle's power switch is closed, the battery voltage is too low, or the long-range wireless communication signal is lost or extremely weak, It can still automatically open the device installation and calibration interface by detecting the Bluetooth signal of the smart phone, and correct the accelerometer and gyroscope parameters and fix the position, thereby helping users to install the accelerometer and gyroscope correctly and efficiently. Focus on the purpose of the vehicle device.

1‧‧‧ vehicle device

11‧‧‧Long distance wireless communication module

12‧‧‧Central Processing Unit

13‧‧‧Memory

14‧‧‧Bluetooth interface

15‧‧‧Wired transmission interface

2‧‧‧ Handheld communication equipment

2’‧‧‧ smart phone

21‧‧‧long-distance wireless communication module

22‧‧‧Bluetooth interface

23‧‧‧ positioning unit

3‧‧‧vehicle condition detection device

31‧‧‧Accelerometer

32‧‧‧ Gyroscope

33‧‧‧Wired transmission interface

34‧‧‧ Vehicle Control Interface

4‧‧‧Short-range wireless communication network

5‧‧‧Long distance wireless communication network

100 ~ 102‧‧‧ steps

200 ~ 207‧‧‧ steps

300 ~ 307‧‧‧ steps

S201 ~ S204‧‧‧step

FIG. 1 is a system architecture diagram of a system for installing an accelerometer and a gyroscope in a vehicle device according to the present invention; FIG. 2 is a step diagram of a calibration method for installing an accelerometer and a gyroscope in a vehicle device according to the present invention; FIG. 3 is a schematic structural diagram of a specific embodiment of a system for installing an accelerometer and a gyroscope to a vehicle device according to the present invention; FIG. 4 is a flowchart of a method for calibrating the accelerometer to a vehicle device according to the present invention; and FIG. 5 is a flowchart of a calibration method for installing a gyroscope on a vehicle device according to the present invention.

The technical content of the present invention will be described below with specific embodiments. Those skilled in the art can easily understand the advantages and effects of the present invention from the content disclosed in this specification. However, the present invention can also be implemented or applied in other specific embodiments.

FIG. 1 is a system architecture diagram illustrating a system for installing an accelerometer and a gyroscope in a vehicle device according to the present invention. As shown in the figure, the system for installing an accelerometer and a gyroscope in a vehicle device of the present invention includes a vehicle-mounted device 1, a handheld communication device 2 and a vehicle state detection device 3.

The vehicle state detection device 3 is installed in a vehicle, and is used to collect vehicle state information of the vehicle to obtain a vehicle acceleration value and an angular velocity value.

In one embodiment, the vehicle state detection device 3 includes an accelerometer, a gyroscope, and a wired transmission interface. The wired transmission interface is used to connect with the vehicle-mounted device 1, and the accelerometer and the gyroscope are used as sensors for Get the vehicle status information of the vehicle.

The in-vehicle device 1 is also disposed in a vehicle. In an embodiment, the in-vehicle device 1 may be a car computer, an external host, a tablet computer, or a smart phone. The vehicle-mounted device 1 is used to receive the vehicle The speed value and the angular speed value are used to analyze and calculate the vehicle acceleration value and the angular speed value to obtain the vehicle speed value and the rotation angle value. The vehicle speed value and the rotation angle value exceed a set value and a preset offset, respectively. The angular velocity value generates a correction message.

In one embodiment, the vehicle-mounted device 1 includes a long-range wireless communication module, a short-range Bluetooth communication interface, and a wired transmission interface. The wired transmission interface is used to connect with the vehicle status detection device 3.

The handheld communication device 2 is connected to the vehicle-mounted device 1 through the identification of the vehicle-mounted device 1. The user can control the vehicle-mounted device 1 through the handheld communication device 2 to install and calibrate the accelerometer and gyroscope. Among them, the handheld communication device 2 passes through A long-distance wireless communication network 5 transmits remote management information to the vehicle-mounted device 1. For example, the long-distance wireless communication network may be a communication network such as GPRS, 3G / HSDPA, WiMax, or 4G / LTE; in addition, handheld communication The device 2 transmits a handshake message and the calibration message to the vehicle-mounted device 1 through a short-range wireless communication network 4. For example, the short-range wireless communication network 4 is Bluetooth communication.

In one embodiment, the handheld communication device 2 includes a Bluetooth communication interface, a mobile communication network, and a positioning unit. The Bluetooth communication interface is used for short-distance connection with the vehicle-mounted device 1, and the mobile communication network is used for long-distance communication with the vehicle-mounted device 1. Distance connection, and the mobile communication network and positioning unit can be used for authentication / setting, emergency connection and activation of the calibration function with the vehicle-mounted device 1. In addition, the aforementioned positioning unit can use GPS, AGPS, Wifi, or Cell ID for positioning

Specifically, the vehicle-mounted device 1 is used to determine whether the vehicle speed value is When the set value is exceeded, when the set value is exceeded, the short-range wireless communication network 4 notifies the handheld communication device 2 to perform calibration of the accelerometer parameters and hardware equipment; in addition, the vehicle-mounted device 1 is used to judge the Whether the gyroscope installed in the vehicle exceeds a preset offset angular velocity value, so that when the offset angular velocity value is exceeded, the handheld communication device 2 is notified via the short-range wireless communication network 4 to perform the gyroscope parameters and hardware equipment Of correction.

In order to reduce the space occupied by the equipment in the vehicle, in another embodiment, the vehicle state detection device 3 is integrated in the vehicle-mounted device 1. In this case, the vehicle state detection device 3 and the in-vehicle device 1 can perform internal data transfer without performing message transfer through an external line.

FIG. 2 illustrates the steps of the method for calibrating an accelerometer and a gyroscope in a vehicle device according to the present invention, that is, explaining that a vehicle is equipped with a vehicle-mounted device and a vehicle state detection device. The vehicle state detection device senses the vehicle state and returns To the vehicle-mounted device, the vehicle-mounted device can be connected with the user's handheld communication device, so that the user can install and calibrate the accelerometer and gyroscope through the handheld communication device. The steps are shown in the figure, please refer to the system in Figure 1 Architecture.

In step S201, the handheld communication device is connected with the vehicle-mounted device after the identity is identified. This step is to explain that the handheld communication device must pass the identification before connecting with the on-board device on the vehicle. The identification method can be through, for example, the door number, IMSI code, IMEI code of the smart phone or the MAC address of the Bluetooth device. After identity recognition, the handheld communication device is allowed to connect with the vehicle-mounted device and hand over the control of the calibration device to be operated by the user.

In step S202, a vehicle state detection device is caused to obtain the vehicle status. Vehicle status information is transmitted to the vehicle-mounted device. Because of the correction, the vehicle status information, such as the triaxial acceleration value and triaxial angular velocity value, must be obtained and sent to the vehicle-mounted device for analysis and judgment. If the obtained vehicle status information is different from the data presented by the accelerometer and gyroscope, This means that the accelerometer and gyroscope need to be calibrated.

In step S203, the vehicle-mounted device is caused to analyze and calculate the vehicle state information to obtain a vehicle speed value and a rotation angle value of the vehicle. This step indicates that the vehicle-mounted device will analyze and calculate according to the vehicle status information, such as the triaxial angular velocity value and the triaxial acceleration value, and transmit it to the central processor of the vehicle device for calculation to obtain the vehicle speed value and rotation angle of the vehicle. Value, vehicle speed value and rotation angle value can be stored in the memory of the vehicle-mounted device, and then compared with the data presented by the accelerometer and gyroscope.

In step S204, the vehicle-mounted device is caused to determine whether the vehicle speed value and the rotation angle value exceed a set value and a preset offset angular speed value, so that the rotation angle value exceeds the set value or the rotation angle value exceeds the preset value. When offsetting the angular velocity value, the handheld communication device is notified via short-range wireless communication to perform calibration of accelerometer parameters and hardware devices or correction of gyroscope parameters and hardware devices. This step is to determine whether the vehicle speed value and the rotation angle value exceed the set value and the preset offset angular speed value. If it exceeds, it means that the accelerometer or gyroscope needs to be calibrated, so you can contact the handheld communication device via the short-range wireless communication network for After the user receives the notification, the on-board device is operated by the handheld communication device to calibrate the parameters of the accelerometer or gyroscope and the hardware equipment.

FIG. 3 is a device for installing an accelerometer and a gyroscope in a vehicle according to the present invention The architecture diagram of a specific embodiment of the system is described below. The overall architecture of the system for installing an accelerometer and a gyroscope on a vehicle device, as well as the vehicle-mounted device 1, the smart phone 2 ', and the vehicle state detection are further explained under the structure shown in FIG. Specific implementation details of each device such as the device 3.

The vehicle-mounted device 1 includes a long-distance wireless communication module 11, a central processing unit 12, a memory 13, a Bluetooth interface 14, and a wired transmission interface 15. The long-distance wireless communication module 11 can be used for management setting / monitoring or receiving functions of the smart phone 2 'and installing accelerometers and gyroscopes. In addition, the short-range Bluetooth communication interface (referred to as the Bluetooth interface) can be used with smart phones. 2 'connection, used to judge and execute the automatic prompt to install the accelerometer and gyroscope to correct the timing.

The on-vehicle device 1 stores a smart phone that allows controlling the door, such as identification through door number, IMSI code, IMEI code, or the MAC address of the Bluetooth device, as a basis for allowing calibration of the accelerometer and gyroscope functions. Used to manage the use rights of the vehicle. When the vehicle-mounted device 1 and the certified smartphone 2 'complete the connection operation, enter the calibration menu. When only the smartphone 2' and the vehicle-mounted device 1 are allowed to be connected, the vehicle-mounted device 1 will surrender control of the calibration device Operated by the user.

Specifically, the in-vehicle device 1 may be a car computer, an external host, a tablet computer, or a smart phone. The long-range wireless communication (GPRS, 3G / HSDPA, WiMax, 4G / LTE) module 11 of the in-vehicle device 1 and the Bluetooth interface 14 (short-range Bluetooth communication interface) can connect the in-vehicle device 1 and the smartphone 2 ' The wired transmission interface 15 can exchange information with the vehicle condition detection device 3, for example, via USB / UART / RS-232, or the vehicle condition detection device 3 can be integrated in the vehicle device 1, so that the two are single. device.

The vehicle state detection device 3 includes sensors such as an accelerometer 31 and a gyroscope 32, a wired transmission interface 33, and a vehicle control interface 34. The vehicle control interface 34 collects the vehicle status, such as the door opening and closing status, the accelerometer and gyroscope calibration status, and the switch ON / OFF status, and has the function of returning calibration data. The sensor is used to obtain the vehicle status information, and its content can be the three-axis angular velocity and three-axis acceleration value and transmitted back to the vehicle-mounted device 1 through the wired transmission interface 33 (such as USB / UART / RS-232, etc.), and the vehicle condition detection device 3 The acceleration value obtained by detecting the vehicle will be sent to the central processor 12 of the vehicle-mounted device 1 to calculate the vehicle speed value to determine whether the traveling speed exceeds the set value and stored in the memory 13 of the vehicle-mounted device 1. In addition, the angular velocity value obtained by the vehicle state detection device 3 detecting the vehicle is transmitted to the central processing unit 12, which is calculated by the central processing unit 12 to obtain the rotation angle value. By determining whether the rotation angle exceeds a preset offset angular velocity value, Then, it is stored in the memory 13, and then the smart phone 2 ′ is notified for the user to perform the calibration of the accelerometer and the gyroscope.

In the foregoing, the vehicle status detection device 3 may be integrated in the vehicle-mounted device 1. In this case, the wired transmission interface (USB / RS-232) between the vehicle control interface 34 and the vehicle control interface 34 of the vehicle status detection device 3 can be reduced. )setting.

The smart phone 2 'has a long-distance wireless communication module 21, a Bluetooth interface 22 (Bluetooth communication interface), and a positioning unit 23. The Bluetooth interface 22 provides the user to connect with the vehicle-mounted device 1 through the smart phone 2 '. At this time, the short-distance wireless communication network 4 is used to receive the sensing data obtained by the vehicle-mounted device. Long-distance wireless communication module 21, such as GPRS, 3G / HSDPA, Mobile communication systems such as WiMax and 4G / LTE are used to provide the smart phone 2 'to connect with the in-vehicle device 1 through the long-distance wireless communication network 5. This state means that when the smart phone 2' is far from the in-vehicle device 1, Messages can only be transmitted through the long-distance wireless communication network 5, so it can usually be used for authentication / setting, emergency connection, and correction function activation with the vehicle-mounted device 1. In addition, the positioning unit 23 can perform positioning using GPS, AGPS, Wifi, and Cell ID.

Under the above structure, the scenario of automatic prompting for accelerometer and gyroscope calibration is further explained. The vehicle-mounted device 1 is installed in the vehicle, and can transmit messages to and from the user's smartphone 2 'by wireless transmission. The vehicle condition detection device 3 is also installed in the vehicle to collect the vehicle status and transmit the vehicle acceleration and angular velocity to Vehicle-mounted device 1 performs numerical calculations; handheld communication devices specifically refer to smartphones 2 'with Bluetooth communication interfaces, for users to connect with vehicle-mounted device 1 through this device, so that vehicle-mounted device 1 can install accelerometers and gyroscopes on the basis . Long-distance wireless communication network 5 is used as a medium for remote management message transmission of vehicle-mounted device 1 and smart phone 2 ', and short-distance wireless communication network 4 is used as a medium for message transmission of vehicle-mounted device 1 and smart phone 2', and used as a calibration medium The basis of the device parameters. The vehicle-mounted device 1 is used to determine whether the traveling speed exceeds a set value. When the vehicle-mounted device 1 exceeds the set value, the mobile phone 2 'is notified via the short-range wireless communication network 4 for calibration of the accelerometer and hardware equipment. It is used to determine whether the gyroscope installed in the vehicle exceeds a preset offset angular velocity value. When the offset angular velocity value is exceeded, the smartphone 2 'is notified through the short-range wireless communication network 4 to perform the gyroscope parameters and hardware. Equipment calibration.

In other cases, such as when the vehicle's power switch is closed and the long-range wireless (3G / HSDPA, 4G / LTE) signal is almost out of contact or lost (Link-loss), the in-vehicle device 1 can automatically store and record the current speed / Speed / positioning (GPS / AGPS / Wifi / Cell ID positioning) information.

After the vehicle-mounted device 1 detects the Bluetooth signal of the smartphone 2 'and the signal gradually increases for a few seconds, the vehicle-mounted device 1 automatically prompts to install the accelerometer and gyroscope calibration procedures to achieve a convenient installation for the user (driving). purpose.

In order for the in-vehicle device 1 to enter the power-saving mode, when the latest position of the smartphone 2 ′ is as far away as the aforementioned distance that cannot be reached immediately, the smartphone 2 ′ can automatically issue a command for the in-vehicle device 1 to sleep via the long-distance wireless communication network 5. And close the bluetooth communication interface, this power saving function can also be operated by the user to operate the smart phone 2 'manually to execute the command to sleep. In addition, when the user's smart phone 2 'enters a position that can be reached within a few minutes, the smart phone 2' can issue a wake-up command of the in-vehicle device 1 via the long-distance wireless communication network 5 and start the Bluetooth communication interface. This wake-up mechanism also The smart phone 2 'can be operated by the user.

FIG. 4 is a flowchart illustrating a method of calibrating an accelerometer to a vehicle device according to the present invention. As shown in the figure, steps 100 to 102 determine whether the switch is turned on and determine whether it is in sleep mode or need to enter the sleep mode. When the switch is turned on and does not need to be in the sleep state, it enters the standby mode of step 200. In the standby mode, Steps 201 to 202 determine whether there is a connection between the in-vehicle device and the smart phone. If there is a connection, then proceed to steps 203 to 207, that is, the in-vehicle device enters the stage of determining whether a correction is required. The accelerometer is used to read the driving acceleration, and then step 204 sends the driving acceleration to the central processor to calculate the driving speed. Then, step 205 determines whether the calculated driving speed is equal to the actual driving speed. If it enters step 206, it indicates that the calibration is completed. Otherwise, it goes to step 207, changes the accelerometer parameters and the installation angle and orientation, and then returns to steps 203 to 205 to determine whether the calibration is completed or it needs to be recalibrated.

FIG. 5 is a flowchart illustrating a method for calibrating a gyroscope to a vehicle device according to the present invention. As shown in the figure, steps 100 to 102 determine whether the switch is turned on and decides whether it is in sleep mode or needs to enter the sleep mode. When the switch is turned on and does not need to be in the sleep state, it enters the standby mode of step 300. In the standby mode Steps 301 to 302 determine whether there is a connection between the in-vehicle device and the smart phone. If there is a connection, then proceed to steps 303 to 307, that is, the in-vehicle device determines whether the calibration phase is required. At this time, the gyroscope is read by step The rotational angular velocity, and then the step 304 sends the read rotational angular velocity to the central processing unit to calculate the rotational angle. In step 305, it is determined whether the calculated rotational angle is equal to the actual angle. If it enters step 306, it indicates that the calibration is complete. Otherwise, it proceeds to step 307 to change the gyroscope parameters and installation angle and orientation, and then returns to steps 303 to 305 to determine whether the calibration is completed or it is necessary to recalibrate.

In summary, the present invention provides a system and a calibration method for installing an accelerometer and a gyroscope on a vehicle device, which have the following advantages compared with the conventional technology: (1) the vehicle-mounted device can automatically determine the Timing, when the user approaches the in-vehicle device and detects the Bluetooth signal of the smart phone, it will automatically prompt to install the accelerometer and gyroscope calibration procedure, no need to drive again Automatically open the calibration menu; (2) The vehicle-mounted device can execute the process of installing the accelerometer and gyroscope when the owner of the vehicle is turned off and the long-range wireless (3G / HSDPA, 4G / LTE) signal is almost out of link or lost , Has advantages such as convenience and safety; (3) the present invention performs vehicle state detection and safety management in combination with the fleet management business. Therefore, the present invention can be combined with the vehicle's active and safe front-mounted installation business in the depot to achieve the goals of simple control and management manpower savings.

The above detailed description is a specific description of a feasible embodiment of the present invention, but this embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or change that does not depart from the technical spirit of the present invention should be included in Within the scope of the patent in this case.

Claims (12)

A system for installing an accelerometer and a gyroscope in a vehicle device includes: a vehicle state detection device, which is provided in a vehicle and used to collect vehicle state information of the vehicle to obtain vehicle acceleration values and angular velocity values; An on-vehicle device, which is provided in the vehicle and used to receive the vehicle acceleration value and the angular velocity value from the vehicle state detection device, to analyze and calculate the vehicle acceleration value and the angular velocity value to obtain the vehicle speed value and rotation The angle value is generated when the vehicle speed value and the rotation angle value exceed a set value and a preset offset angular speed value, respectively; a correction message is generated; a hand-held communication device, which is connected to the vehicle under the identity of the vehicle-mounted device Device to provide the user to control the vehicle-mounted device through the handheld communication device for the installation and calibration of the accelerometer and gyroscope, wherein the handheld communication device performs remote management of messages with the vehicle-mounted device through a long-distance wireless communication network Transmission and transmission of handshaking messages and calibration messages with the vehicle-mounted device through a short-distance wireless communication network. The system for installing an accelerometer and a gyroscope in a vehicle device as described in item 1 of the patent scope, wherein the vehicle-mounted device is used to determine whether the vehicle speed value exceeds the set value, and when the set value is exceeded, Notify the handheld communication device via the short-range wireless communication network to perform calibration of the accelerometer parameters and hardware devices, and determine whether the gyroscope installed in the vehicle exceeds the preset offset angular velocity value to exceed the offset When the angular velocity value is passed, the handheld communication device is notified via the short-range wireless communication network to perform calibration of the gyroscope parameters and hardware devices. The system for installing an accelerometer and a gyroscope in a car device as described in item 1 of the patent application scope, wherein the car device is a car computer, an external host, a tablet computer, or a smartphone. The system for installing an accelerometer and a gyroscope in a vehicle device as described in item 1 of the patent application scope, wherein the vehicle-mounted device includes a long-distance wireless communication module, a short-distance Bluetooth communication interface, and a wired transmission interface, the wired transmission The interface is used to connect with the vehicle state detection device. The system for installing an accelerometer and a gyroscope in a vehicle device as described in item 1 of the patent scope, wherein the vehicle state detection device includes the accelerometer, the gyroscope and a wired transmission interface, the wired transmission interface is used for It is connected to the vehicle-mounted device, and the accelerometer and the gyroscope are used to obtain the vehicle state information. The system for installing an accelerometer and a gyroscope in a vehicle device as described in item 1 of the patent application scope, wherein the vehicle state detection device is integrated in the vehicle-mounted device. The system for installing an accelerometer and a gyroscope in a vehicle device as described in item 1 of the patent application scope, wherein the handheld communication device includes a Bluetooth communication interface, a mobile communication network and a positioning unit, and the Bluetooth communication interface is used for The vehicle-mounted device is connected for a short distance, the mobile communication network is used for long-distance connection with the vehicle-mounted device, and the mobile communication network and the positioning unit are used for authentication/setting, emergency connection and correction function activation with the vehicle-mounted device Purpose. The system for installing an accelerometer and a gyroscope in a vehicle device as described in item 7 of the patent application scope, wherein the positioning unit uses GPS, AGPS, Wifi, or Cell ID for positioning. The system for installing an accelerometer and a gyroscope in a vehicle device as described in item 1 of the patent scope, wherein the long-distance wireless communication network is GPRS, 3G/HSDPA, WiMax, or 4G/LTE. The system for installing an accelerometer and a gyroscope in a vehicle device as described in item 1 of the patent application scope, wherein the short-range wireless communication network is Bluetooth communication. A calibration method for installing an accelerometer and a gyroscope in a vehicle device. The calibration method includes: connecting the handheld communication device to the vehicle-mounted device after being identified; and enabling the vehicle state detection device to obtain vehicle state information of the vehicle for transmission to the vehicle-mounted device Device; causing the vehicle-mounted device to analyze and calculate the vehicle state information to obtain the vehicle speed value and rotation angle value of the vehicle; and the vehicle-mounted device to determine whether the vehicle speed value and the rotation angle value exceed the set value and the preset offset Angular velocity value, when the rotation angle value exceeds the set value or the rotation angle value exceeds the preset offset angular velocity value, the handheld communication device is notified via a short-distance wireless communication network to perform accelerometer parameters and hardware device Calibration or calibration of gyroscope parameters and hardware equipment. The calibration method of installing an accelerometer and a gyroscope in a vehicle device as described in item 11 of the patent application scope, wherein the vehicle state information includes a three-axis angular velocity value and a three-axis acceleration value, the three-axis angular velocity value and the three-axis The acceleration value is transmitted to the central processing unit of the vehicle-mounted device for calculation to obtain the vehicle speed value and the rotation angle value and stored in the memory of the vehicle-mounted device, so that the vehicle speed value and the rotation angle value exceed the set value and the When the offset angular velocity value is preset, the installation and calibration of the accelerometer and the gyroscope are performed.