A vehicle-mounted terminal and position acquisition method based on short-range wireless communication

Abstract

A vehicle-mounted terminal and position acquisition method based on short-range wireless communication, the vehicle-mounted terminal includes: a GSM module, a GPS / Beidou module, a short-range wireless communication module and a power module; the GPS / Beidou module is connected to the GSM module to send positioning information; the short-range wireless communication module is connected to the GSM module to send the ID, signal strength and battery power information of the collected device, and / or send the ID, signal strength and battery power information of the vehicle-mounted terminal to other vehicle-mounted terminals; the power module is respectively connected to the GSM module, the GPS / Beidou module and the short-range wireless communication module to supply power. The present invention can solve the shortcomings of the vehicle-mounted terminal of the existing positioning technology that is easily shielded, interfered and detected, and realize the accurate positioning of the collected device; at the same time, it can transmit wireless signals to the collection device to realize the positioning of the vehicle of the vehicle-mounted terminal.

Description

Technical Field

[0001] The present invention relates to the technical field of short-range wireless communication, and in particular to a vehicle-mounted terminal and a position acquisition method based on short-range wireless communication. Background Art

[0002] Vehicle positioning technology is one of the core risk control of automobile finance. At present, the vehicle positioning technologies adopted at home and abroad are generally GPS / Beidou, LBS and WIFI positioning. These positioning technologies generally have well-known principles, standard frequency bands, fixed coding and modulation technologies, so they are relatively easy to be shielded, interfered, detected, and dismantled, thus losing the positioning function. In particular, in the automobile financial leasing industry, when a defaulting vehicle appears, the defaulting party generally hides the vehicle, such as hiding it in a completely closed rolling door garage, a farmyard with high walls, etc. When such a situation occurs, it is impossible to accurately locate the vehicle by relying on traditional positioning methods such as GPS / Beidou, LBS, WIFI (positioning vehicle-mounted terminals), so it is impossible to know which garage or farmyard the car is in. This makes it impossible for the financial leasing company to find the vehicle and to constrain the defaulting party, thereby causing the risk of assets and funds not being recovered. Summary of the invention

[0003] The main purpose of the present invention is to propose a vehicle-mounted terminal and position collection method based on short-range wireless communication, which can solve the shortcomings of vehicle-mounted terminals in existing positioning technologies that are easily shielded, interfered with and detected, and realize accurate positioning of the collected equipment; at the same time, it can transmit wireless signals to the collection equipment to realize the positioning of the vehicle of this vehicle-mounted terminal.

[0004] The present invention adopts the following technical solution:

[0005] On the one hand, the present invention provides a vehicle-mounted terminal based on short-range wireless communication, comprising: a GSM module, a GPS / Beidou module, a short-range wireless communication module and a power module;

[0006] The GPS / Beidou module is connected to the GSM module and is used to send the obtained positioning information to the GSM module;

[0007] The short-range wireless communication module is connected to the GSM module and is used to send the received collected device ID and signal strength information sent by the collected device to the GSM module, and / or send the vehicle terminal ID and signal strength of the vehicle terminal to the collection device;

[0008] The power module is connected to the GSM module, the GPS / Beidou module and the short-range wireless communication module respectively to supply power;

[0009] The GSM module is used to calculate the distance between the vehicle terminal and the collected device according to the received signal strength, and obtain the location information of the collected device based on the positioning information; it is also used to connect to an external wireless or wired network, and for LBS base station positioning.

[0010] Preferably, the distance between the vehicle terminal and the collected device is calculated according to the received signal strength in the following manner:

[0011] d=B Λ (((250-RSSI) / A)-1)

[0012] Among them, d represents the calculated distance in meters; B represents the environmental index factor; RSSI represents the received signal strength; A represents the difference between the signal strength when the collected device and the vehicle terminal are 1 meter apart and the preset signal strength.

[0013] Preferably, a vibration sensor; the vibration sensor is connected to the GSM module to send the collected vehicle vibration information; the power module is connected to the vibration sensor to supply power.

[0014] Preferably, a hardware watchdog; the hardware watchdog is connected to the GSM module to reset the GSM module; the power module is connected to the hardware watchdog to supply power.

[0015] Preferably, the short-range wireless communication module adopts 433M spread spectrum communication.

[0016] Preferably, the short-range wireless communication module adopts si4438 chip.

[0017] On the other hand, the present invention provides a method for collecting position using a vehicle-mounted terminal based on short-range wireless communication, characterized in that it includes the vehicle-mounted terminal; the method for collecting position includes:

[0018] The GSM module is connected to a data network;

[0019] The GSM module obtains base station number information;

[0020] The GPS / Beidou module collects satellite signals to calculate the location information of the vehicle-mounted terminal and sends it to the GSM module;

[0021] The short-range wireless communication module obtains the collected device ID and signal strength information sent by the collected device and sends them to the GSM module;

[0022] The GSM module calculates the distance between the vehicle terminal and the collected device according to the signal strength, and obtains the location information of the collected device in combination with the positioning information obtained by the GPS / Beidou module;

[0023] The GSM module sends information including the ID of the collected device and the location of the collected device to the background service center.

[0024] Preferably, the location acquisition method specifically includes:

[0025] Step a, the GSM module determines whether it can connect to the data network. If not, the short-range wireless communication module is controlled to start the short-range transmission function and send the vehicle terminal ID and signal strength information of the vehicle terminal to the acquisition device; if yes, execute step b;

[0026] Step b, the GSM module obtains base station number information;

[0027] Step c, the GSM module determines whether the GPS module can locate the location information of the vehicle-mounted terminal; if not, the short-range wireless communication module is controlled to start the short-range transmission function, and send the vehicle-mounted terminal ID and signal strength information of the vehicle-mounted terminal to the acquisition device; if yes, step d is executed;

[0028] Step d, the GSM module determines whether it has received the short-distance transmission start instruction sent by the background service center. If it has received it, it sends the vehicle terminal ID and signal strength information of the vehicle terminal to the acquisition device; if it has not received it, execute step e;

[0029] The GSM module sends information including the ID of the collected device and the location of the collected device to the background service center.

[0030] Preferably, the location acquisition method further includes:

[0031] The GSM module acquires vibration information of the vehicle on which the vehicle-mounted terminal is installed, thereby determining the movement status of the vehicle on which the vehicle-mounted terminal is installed.

[0032] Preferably, the location acquisition method further includes:

[0033] The hardware watchdog monitors whether the GSM module operates normally, and if not, resets the GSM module.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] (1) In addition to the traditional GPS / Beidou, LBS and WIFI positioning functions, the vehicle terminal based on short-range wireless communication of the present invention also has a short-range wireless communication function. It can receive the wireless signal sent by the collected device (position transmitter or other vehicle terminal) on other vehicles within a range of 1000 meters, determine the other party's vehicle terminal ID and signal strength, and report it to the background service center in combination with its own GPS and other location information to achieve the positioning of the collected device with a positioning accuracy of about 1 meter. It realizes the short-range vehicle search function that is urgently needed in the industry, which will surely bring considerable social and economic benefits;

[0036] (2) The vehicle-mounted terminal based on short-range wireless communication of the present invention can calculate the distance between the vehicle-mounted terminal and the collected device according to the received signal strength of the collected device, and then obtain the location information of the collected device in combination with the positioning information obtained by the GPS / Beidou module;

[0037] (3) When the vehicle-mounted terminal based on short-range wireless communication of the present invention is blocked and cannot upload any data to the background service center after its own GPS / Beidou, LBS and WIFI positioning functions are blocked, it can activate the short-range wireless transmission function to send a wireless signal including its own vehicle-mounted terminal ID and signal strength to other vehicle-mounted terminals or handheld finders within a range of 1000 meters. Other vehicle-mounted terminals or handheld finders report to the background service center to realize the positioning of the vehicle-mounted terminal;

[0038] (4) The method for collecting position of a vehicle terminal based on short-range wireless communication of the present invention first determines whether the vehicle terminal can connect to the network. If not, the vehicle terminal actively turns on the short-range transmission function. If it can connect to the network, the base station number information is obtained to further determine whether the GPS module can locate. If not, the vehicle terminal actively turns on the short-range transmission function. If it can locate, but due to the positioning error of the GPS itself and the vehicle is hidden and invisible, the short-range transmission function of the vehicle terminal is actively turned on through the background service center.

[0039] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention so that it can be implemented in accordance with the contents of the specification, and in order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below.

[0040] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a structural block diagram of the vehicle-mounted terminal of the present invention;

[0042] Figure 2 This is the main flow chart of the vehicle terminal location acquisition method of the present invention;

[0043] Figure 3 This is a specific flow chart of the vehicle-mounted terminal location acquisition method described in the present invention. DETAILED DESCRIPTION

[0044] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0045] See also Figure 1 As shown, on the one hand, the present invention is a vehicle-mounted terminal based on short-range wireless communication, comprising: a GSM module 101, a GPS / Beidou module 102, a short-range wireless communication module 103, a vibration sensor 105, a hardware watchdog 106 and a power module 104. The GSM module 101 is connected to the GPS / Beidou module 102, the short-range wireless communication module 103, the vibration sensor 105 and the hardware watchdog 106 respectively; the power module 104 is connected to the GSM module 101, the GPS / Beidou module 102, the short-range wireless communication module 103, the vibration sensor 105 and the hardware watchdog 106 respectively.

[0046] Specifically, the GSM module 101 is used to realize the following three functions: 1) establishing a connection with a public communication network (wired or wireless network), such as a GPRS communication connection; 2) LBS positioning, that is, base station positioning, collecting base station number information near the vehicle-mounted terminal; 3) serving as the main control module of the entire vehicle-mounted terminal, summarizing, analyzing and processing the data information of the GPS / Beidou module 102, the short-range wireless communication module 103, and the vibration sensor 105.

[0047] The GPS / Beidou module 102 receives navigation information broadcast by satellites in the sky in real time, performs navigation calculations, obtains current latitude and longitude, altitude, speed and other information, and sends it to the GSM module 101 for processing.

[0048] The short-range wireless communication module 103 receives the wireless signal sent by the collected device within a range of 1000 meters, analyzes the collected device ID and signal strength information therein, and sends this information to the GSM module 101. Specifically, the collected device includes a position transmitter and / or other vehicle-mounted terminals (the other vehicle-mounted terminals described in the present invention have the same structure and function as the vehicle-mounted terminals, but are installed on different vehicles). When the collected device is a position transmitter, the short-range wireless communication module 103 is used to send the received position transmitter ID and signal strength information sent by the position transmitter to the GSM module 101; when the collected device is other vehicle-mounted terminals, the received vehicle-mounted terminal ID and signal strength information sent by other vehicle-mounted terminals are sent to the GSM module 101. The collected device ID is used to uniquely identify a device. The wireless signal sent by the collected device to the vehicle-mounted terminal 10 can also be agreed upon as needed, such as including battery power information, and the vehicle-mounted terminal 10 sends the battery power information to the background service center 30 together so as to determine the search strategy according to the battery power information of the position transmitter 20.

[0049] At the same time, when the GPS / Beidou, LBS and WIFI positioning functions of the vehicle terminal itself are blocked, the short-range wireless communication module 103 starts the short-range wireless transmission function, and can send a wireless signal including the vehicle terminal ID and signal strength information to the collection device (other vehicle terminals or handheld finders) within a range of 1000 meters. The wireless signal can also be agreed upon as needed, such as including battery power information, so as to determine the search strategy according to the battery power information of the collected device.

[0050] The short-range wireless communication module 103 uses the si4438 chip, and the short-range wireless communication module 103 uses 433M spread spectrum communication with the position transmitter or other vehicle-mounted terminals. The specific air data format is shown in Table 1 below.

[0051] Table 1

[0052]

[0053] Specifically, after the vehicle terminal receives the signal strength (RSSI) of the collected device, the distance between the vehicle terminal and the collected device is calculated according to the received signal strength, as follows:

[0054] d=B Λ (((250-RSSI) / A)-1)

[0055] Where, d represents the calculated distance in meters; B represents the environmental index factor; Λrepresents the index; RSSI represents the received signal strength; A represents the difference between the signal strength when the collected device and the vehicle terminal are 1 meter apart and the preset signal strength.

[0056] Specifically, the environmental index factor refers to the loss of the radio frequency signal when it propagates in various media (such as air). In this embodiment, B is 4; the range of RSSI is 0 to 250, and the larger the value, the stronger the strength and the closer the distance; the preset signal strength is 250 (such as the signal strength is 220 when the distance is 1m, then A=30).

[0057] It should be noted that when the vehicle-mounted terminal is used as a collection device, the frequency, coding, and modulation methods used by the short-range wireless module in the vehicle-mounted terminal and the short-range transmission module in the collected device are exactly the same. In this way, the vehicle-mounted terminal can receive the ID sent by the collected device and the corresponding battery power information of the ID. At the same time, the vehicle-mounted terminal obtains its own position through its own GPS module, and judges the distance between the position transmitter and itself through the signal strength of the position transmitter, thereby obtaining the location information of the position transmitter, and then uploads it to the background service center to realize the positioning of the position transmitter.

[0058] When the vehicle-mounted terminal is used as the collected device, the air data format between it and the collection device can refer to Table 1, and the distance calculation method between the vehicle-mounted terminal and the collection device can also refer to the above formula. The frequency, coding, and modulation methods used by the short-range wireless module in the vehicle-mounted terminal and the short-range wireless module in the collection device are exactly the same. In this way, the collection device can receive the ID sent by the vehicle-mounted terminal and the corresponding battery power information of the ID. At the same time, the collection device obtains its own position through its own GPS module, and judges the distance between the vehicle-mounted terminal and itself through the signal strength of the vehicle-mounted terminal, thereby obtaining the location information of the position transmitter, and then uploading it to the background service center to realize the positioning of the vehicle-mounted terminal.

[0059] The vibration sensor 105 can collect vehicle vibration information, thereby determining whether the vehicle is in motion or stationary state, and deciding whether to turn on or off certain components to achieve the purpose of saving power.

[0060] The hardware watchdog 106 resets the entire system when an abnormality occurs in the operation of the vehicle-mounted terminal, thereby ensuring that the vehicle-mounted terminal can operate without failure for a long time.

[0061] The power supply module 104 provides suitable operating voltage and current for the GSM module 101, the GPS / Beidou module 102, the short-range wireless communication module 103, the vibration sensor 105 and the hardware watchdog 106, ensuring that the GSM module 101, the GPS / Beidou module 102, the short-range wireless communication module 103, the vibration sensor 105 and the hardware watchdog 106 can be powered on and work normally.

[0062] See also Figure 2 As shown, on the other hand, a method for collecting position by a vehicle-mounted terminal based on short-range wireless communication includes the vehicle-mounted terminal based on short-range wireless communication; the method for collecting position includes:

[0063] Step 201, the GSM module is connected to a data network;

[0064] Step 202, the GSM module obtains base station number information;

[0065] Step 203, the GPS / Beidou module collects satellite signals to calculate the location information of the vehicle-mounted terminal and sends it to the GSM module;

[0066] Step 204, the short-range wireless communication module obtains the ID and signal strength information of the collected device sent by the collected device and sends it to the GSM module;

[0067] Step 205, the GSM module calculates the distance between the vehicle terminal and the collected device according to the signal strength, and obtains the location information of the collected device in combination with the positioning information obtained by the GPS / Beidou module;

[0068] Step 206: The GSM module sends information including the ID and location of the collected device to the background service center.

[0069] See also Figure 3 As shown, in this embodiment, the location acquisition method specifically includes:

[0070] Step a, the GSM module determines whether it can connect to the data network. If not, the short-range wireless communication module is controlled to start the short-range transmission function and send the vehicle terminal ID and signal strength information of the vehicle terminal to the acquisition device; if yes, execute step b;

[0071] Step b, the GSM module obtains base station number information;

[0072] Step c, the GSM module determines whether the GPS module can locate the location information of the vehicle-mounted terminal; if not, the short-range wireless communication module is controlled to start the short-range transmission function, and send the vehicle-mounted terminal ID and signal strength information of the vehicle-mounted terminal to the acquisition device; if yes, step d is executed;

[0073] Step d, the GSM module determines whether it has received the short-distance transmission start instruction sent by the background service center. If it has received it, it sends the vehicle terminal ID and signal strength information of the vehicle terminal to the acquisition device; if it has not received it, execute step e;

[0074] The GSM module sends information including the ID of the collected device and the location of the collected device to the background service center.

[0075] In this embodiment, the location acquisition method further includes:

[0076] The GSM module acquires vibration information of the vehicle on which the vehicle-mounted terminal is installed, thereby determining the movement status of the vehicle on which the vehicle-mounted terminal is installed.

[0077] In this embodiment, the location acquisition method further includes:

[0078] The hardware watchdog monitors whether the GSM module operates normally, and if not, resets the GSM module.

[0079] Specifically, the short-range wireless transmission function in the vehicle-mounted terminal of the present invention is mainly used in the following situations:

[0080] (1) When all GSM and GPS signals are blocked and no data can be uploaded to the background service center (the background service center in the present invention refers to a system that can connect to the data network for data processing and data display), the vehicle terminal will actively turn on the short-range transmission function, and the vehicle seeker can use a handheld finder (the handheld finder in the present invention refers to a device that includes short-range wireless communication function, has an interface display, and can be carried and moved by a person or vehicle) to search for the vehicle location in places where the vehicle installed with the vehicle terminal has frequently appeared. During the movement of the handheld finder, the handheld finder can receive signals from the vehicle terminal within a radius of 1,000 meters with the handheld finder as the center, thereby determining the location of the blocked vehicle;

[0081] (2) When the GSM signal is good but the GPS signal is blocked, the vehicle seeker can find the approximate location of the vehicle based on the positioning information of the GSM base station, and then use a handheld finder to receive the short-range wireless signal emitted by the vehicle-mounted device, gradually approach the vehicle, and finally find the vehicle's location;

[0082] (3) When the GSM signal and GPS signal are good, but due to the positioning error of the GPS itself and the vehicle is hidden and invisible, the short-range transmission function of the vehicle terminal is actively turned on through the background service center. At this time, the vehicle seeker can first reach the approximate location of the vehicle, and then use a handheld finder to receive short-range wireless signals, gradually approach the vehicle, and finally find the vehicle location.

[0083] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A vehicle-mounted terminal based on short-range wireless communication, characterized in that: include: GSM module, GPS / Beidou module, short-range wireless communication module and power module; The GPS / Beidou module is connected to the GSM module and is used to send the obtained positioning information to the GSM module; The short-range wireless communication module is connected to the GSM module and is used to send the received collected device ID and signal strength information sent by the collected device to the GSM module, and / or send the vehicle terminal ID and signal strength of the vehicle terminal to the collection device; The power module is connected to the GSM module, the GPS / Beidou module and the short-range wireless communication module respectively to supply power; The GSM module is used to calculate the distance between the vehicle terminal and the collected device according to the received signal strength, and obtain the location information of the collected device based on the positioning information; It is also used to connect to external wireless or wired networks and for LBS base station positioning; The distance between the vehicle terminal and the collected device is calculated based on the received signal strength as follows: d=B Λ (((250-RSSI) / A)-1) Where, d represents the calculated distance in meters; B represents the environmental index factor; RSSI indicates the received signal strength; A indicates the difference between the signal strength when the collected device and the vehicle terminal are 1 meter apart and the preset signal strength.

2. The vehicle-mounted terminal based on short-range wireless communication according to claim 1, characterized in that: Also includes: Shock sensor; The vibration sensor is connected to the GSM module to send the collected vehicle vibration information; The power module is connected to the vibration sensor to supply power.

3. The vehicle-mounted terminal based on short-range wireless communication according to claim 1, characterized in that: Also includes: Hardware watchdog; the hardware watchdog is connected to the GSM module to reset the GSM module; The power supply module is connected to the hardware watchdog to supply power.

4. The vehicle-mounted terminal based on short-range wireless communication according to claim 1, characterized in that: The short-range wireless communication module adopts 433M spread spectrum communication.

5. The vehicle-mounted terminal based on short-range wireless communication according to claim 1, characterized in that: The short-range wireless communication module adopts the si4438 chip.

6. A method for collecting position using a vehicle-mounted terminal based on short-range wireless communication, characterized in that: Applicable to the vehicle-mounted terminal according to any one of claims 1 to 5; the location acquisition method comprises: The GSM module is connected to a data network; The GSM module obtains base station number information; The GPS / Beidou module collects satellite signals to calculate the location information of the vehicle-mounted terminal and sends it to the GSM module; The short-range wireless communication module obtains the collected device ID and signal strength information sent by the collected device and sends them to the GSM module; The GSM module calculates the distance between the vehicle terminal and the collected device according to the signal strength, and obtains the location information of the collected device in combination with the positioning information obtained by the GPS / Beidou module; The GSM module sends information including the ID of the collected device and the location of the collected device to the background service center.

7. The method for position acquisition by a vehicle-mounted terminal based on short-range wireless communication according to claim 6, characterized in that: The position acquisition method specifically includes: Step a, the GSM module determines whether it can connect to the data network. If not, the short-range wireless communication module is controlled to start the short-range transmission function and send the vehicle terminal ID and signal strength information of the vehicle terminal to the acquisition device; if yes, execute step b; Step b, the GSM module obtains base station number information; Step c, the GSM module determines whether the GPS module can locate the location information of the vehicle-mounted terminal; if not, the short-range wireless communication module is controlled to start the short-range transmission function, and send the vehicle-mounted terminal ID and signal strength information of the vehicle-mounted terminal to the acquisition device; if yes, step d is executed; Step d, the GSM module determines whether it has received the short-distance transmission start instruction sent by the background service center. If it has received it, it sends the vehicle terminal ID and signal strength information of the vehicle terminal to the acquisition device; if it has not received it, execute step e; Step e: the GSM module sends information including the ID and location of the collected device to the background service center.

8. The method for collecting position of a vehicle-mounted terminal based on short-range wireless communication according to claim 6, characterized in that: The position acquisition method further includes: The GSM module acquires vibration information of the vehicle on which the vehicle-mounted terminal is installed, thereby determining the movement status of the vehicle on which the vehicle-mounted terminal is installed.

9. The method for collecting position of a vehicle-mounted terminal based on short-range wireless communication according to claim 6, characterized in that: The position acquisition method further includes: The hardware watchdog monitors whether the GSM module operates normally, and if not, resets the GSM module.

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