UWB wireless positioning system of automobile digital key

Abstract

The application discloses a UWB wireless positioning system of a digital key of an automobile, which is provided with an automobile shell and rubber pads uniformly assembled on the inner surface of the automobile shell; the UWB wireless positioning system comprises a base connected to one side of the outer surface of the rubber pad and assembled on the inner surface of the automobile shell in cooperation with screws, a nesting piece is mounted on the inner side of the outer surface of the base, a shock pad is connected to the inner surface of the nesting piece in a nested mode, and a fixing plate is mounted on the outer surface of the shock pad. The UWB wireless positioning system of the digital key of the automobile is provided with the base connected with the shock-absorbing rubber pads, the shock-absorbing rubber pads are assembled in cooperation with the nesting piece, the component assembly stability of the control board in the later stage is improved, then the control board on the right front side of the inner surface of the automobile shell is assembled with multiple Bluetooth chips, the rest of the control boards are only assembled with radio frequency chips and control chips, and the components formed by the silica gel are arranged, the assembly stability is improved, and stable cooling treatment is carried out.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of wireless positioning, and particularly relates to a UWB wireless positioning system of a digital key of an automobile. BACKGROUND

[0002] In a traditional communication system, a carrier is generally used to carry data transmission, but UWB does not need to use a carrier, instead, data is transmitted by sending and receiving extremely narrow pulses with nanoseconds or even sub-nanoseconds, and one information bit can be mapped to hundreds of such pulses; according to the Fourier time-frequency transformation rule, the shorter the time domain width of a single cycle UWB pulse is, the wider the corresponding frequency domain bandwidth is, and such a nanosecond time domain pulse signal can generate a frequency domain bandwidth with GHz level; therefore, this technology is also called UWB ultra-wideband technology, and the nanosecond time domain pulse makes the UWB signal have extremely high time resolution, which is suitable for high-precision positioning; UWB is initially mainly used in the military field, and gradually begins to be applied to the commercial field after the commercial specification is published in 2002; the FiRa (fine ranging) alliance and the CCC (global automotive alliance) successively publish corresponding technical protocol specifications to define the corresponding ranging method.

[0003] In the prior art, the authorized publication (announcement) No. CN115843101A is “a UWB automobile digital key positioning system based on wireless transmission ToF distance”, wherein the application relates to a UWB automobile digital key positioning system based on wireless transmission ToF distance, which comprises an automobile key with a UWB chip, a base station installed on an automobile and a host computer. The application has the beneficial effect that the UWB wireless information transmission method is used instead of the traditional CAN bus information transmission method, so as to reduce the material cost of the CAN bus wire harness and chip and the assembly cost of the UWB digital automobile key system. In addition, the application also designs and uses only one frame of data, solves the problem of poor stability of traditional wireless information transmission, and uses a reliable transmission mechanism based on the stop-and-wait protocol to solve the problem of high data packet loss rate.

[0004] In the working process of the above device, the car key initiates ranging communication and transmits frame data information with the base station, and each device saves the transmission and reception time stamp of each message; each ranging communication, the base station and the host carry out reliable transmission based on the principle of stop-and-wait protocol to ensure the accuracy of the data; S2, the base station transmits the data frame information to the host with the UWB chip and adds a data frame, which stores the ranging result at the last time; the host receives the data frame information and returns an acknowledgement character or a denial character to determine whether the data frame information needs to be sent repeatedly, and sets a timeout retransmission to prevent the base station from waiting for the host to return the acknowledgement character indefinitely. Improve channel utilization and ensure the accuracy of data transmission; S3, the host obtains the ranging value by analyzing the data frame to replace the effect of transmitting ToF ranging through the CAN bus; in S3, the host calculates the coordinates by performing mean filtering on the time stamp, signal strength and other information in the data frame, and transmits the coordinates to the central controller; in the design of the data frame, first, each base station uses the asymmetric double-sided bidirectional ranging method to perform point-to-point ranging through the saved time stamp, then performs mean filtering operation on the ranging result, and finally stores it in the data frame, but it is not convenient to set the position of the set chip during use, which may affect the recognized distance, and the set chip position is less, which may cause chip recognition error.

[0005] In addition, in the prior art, the authorized publication (announcement) number: CN113085782A "digital car key positioning system and method", wherein the embodiment of the present application discloses a digital car key positioning system and method, which comprises at least three vehicle end UWB modules and a vehicle end main module, the distance between the digital car key and the vehicle end UWB module is obtained through each vehicle end UWB module, the position information of the digital car key is determined through the vehicle end main module, and the working frequency of the vehicle end UWB module is updated according to the position information, so that the working frequency of the vehicle end UWB module can be flexibly changed according to the actual positioning demand, thereby reducing the power consumption of the vehicle-mounted UWB module; and without starting Bluetooth to wake up the vehicle end UWB module, further reducing the power consumption of the vehicle-mounted UWB module, solving the problem of high energy consumption of the vehicle in the non-starting state, but in the working process of the above device, it is not convenient to protect the chip setting, and the chip set in the high temperature weather is easy to absorb the temperature with the temperature of the automobile shell, which may cause the chip to overheat and affect the signal recognition, and the chip cannot be effectively protected. SUMMARY

[0006] The UWB wireless positioning system of the automobile digital key aims to solve the problems of inconvenient setting of the set chip position, easy influence on the recognition distance, less set chip position, easy chip recognition error, inconvenient chip protection setting, and easy chip overheating in high-temperature weather to affect signal recognition and unable to effectively protect the chip.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a UWB wireless positioning system of an automobile digital key, provided with an automobile shell and rubber pads uniformly assembled on the inner surface of the automobile shell.

[0008] It comprises a base connected to one side of the outer surface of the rubber pad and assembled on the inner surface of the automobile shell with screws, a nesting piece mounted on the inner surface of the outer surface of the base, a shock pad connected to the inner surface of the nesting piece, and a fixed plate mounted on the outer surface of the shock pad.

[0009] A positioning pin is adhesively connected to the inner part of the outer surface of the fixed plate, and the other end of the positioning pin is adhesively connected to a control assembly, the inner surface of the control assembly is rotatably connected to a lead screw, and one end of the outer surface of the lead screw is rotatably connected to a conveyor belt.

[0010] A moving piece is threadedly connected to the outer surface of the lead screw and slidably connected to the inner surface of the control assembly, a moving frame is mounted on one side of the outer surface of the moving piece, threaded rods are rotatably connected to the left and right sides of the outer surface of the moving frame, and a control board is clamped and connected to the inner surface of the moving frame.

[0011] A radio frequency chip is mounted on one side of the outer surface of the control board, a control chip and a Bluetooth chip are mounted on the outer surface of the control board, heat dissipation fin frames are connected to the outer surface of the Bluetooth chip, ear hooks are mounted on the left and right sides of the outer surface of the heat dissipation fin frames, and another set of ear hooks is mounted on the outer surface of the heat dissipation frame.

[0012] A fan is rotatably connected to the middle end of the inner surface of the heat dissipation frame, a nesting ring is mounted on the outer surface of the heat dissipation frame, a protective shell is adhesively connected to the outer surface of the nesting ring, a clamping strip is adhesively connected to the inner surface of the protective shell, and a connecting piece is mounted on the outer surface of the clamping strip.

[0013] Through the above structure, stable assembly is performed during use, and the buffer and temperature reduction structures are matched to improve the stability of the device, the protective shell made of metal material can be connected to the chip for signal reception and release, and the protective shells are separated by insulating materials to prevent mutual influence.

[0014] Preferably, the base forms a damping structure with the automobile shell through a rubber pad, and the automobile shell and the base form a threaded structure, and the base forms a limiting nested structure with the damping pad through a nesting piece, and the damping pad and the fixed plate form a hollow structure.

[0015] Through the above structure, stable assembly is realized during use, the stability of assembly is improved, and damping use is realized through the damping pad.

[0016] Preferably, the fixed plate forms a limiting connection of adhesive nesting with the control assembly through a positioning pin, the control assembly forms a nested rotating structure with the lead screw and the conveying belt, and the outer surface of the lead screw is provided in a bidirectional symmetrical thread.

[0017] Through the above structure, stable nested connection is realized during use, the stability of assembly is improved, and the control of the later structure is synchronized.

[0018] Preferably, the moving piece forms a sliding structure with the control assembly through the lead screw, the moving piece is embeddedly installed on the outer surface of the moving frame, the moving frame forms a rotating structure with the threaded rod, and the outer surface of the moving frame is provided in an inclined structure.

[0019] Through the above structure, stable thread adjustment is realized during use, and later clamping positioning is facilitated.

[0020] Preferably, the inner surface of the moving frame is adhesively connected with a first silica gel pad, the inner surface of the moving frame is snap-connected with a positioning piece, the outer surface of the positioning piece is provided with a second silica gel pad, and the second silica gel pad forms a limiting snap structure with the moving frame through the positioning piece.

[0021] Through the above structure, stable nested assembly is realized during use, extrusion damage during assembly is prevented, and limiting is realized to prevent falling off.

[0022] Preferably, the outer surface of the threaded rod is threadedly connected with a sliding block, the outer surface of the sliding block is provided with a clamping piece, and the inner surface of the clamping piece is limitingly connected with a third silica gel pad.

[0023] Through the above structure, thread adjustment is realized during use, the stability of secondary clamping of the control device is controlled, and protection is formed.

[0024] Preferably, the control plate forms an integrated structure with a radio frequency chip, a control chip and a Bluetooth chip, the Bluetooth chip forms a heat dissipation structure with a heat dissipation fin rack in a pasting manner, the heat dissipation fin rack forms an integrated structure with a hanging ear, and the heat dissipation fin rack forms a bolt connection structure with a heat dissipation rack through the hanging ear.

[0025] Through the above structure, stable connection is realized during use, and heat dissipation treatment is realized in cooperation with the cooling structure.

[0026] Preferably, the heat dissipation frame forms a limiting nested structure with the protective shell through nesting rings, the protective shell forms a clamping structure with the connecting piece through a clamping strip, and the protective shell is symmetrically arranged about the middle end of the outer surface of the connecting piece, and the connecting piece forms an integrated structure with the automobile shell.

[0027] Through the above structure, the stability of the clamping of the protective shell is improved during use, and the connecting piece of the insulating material is used to separate the signal receiving and releasing areas.

[0028] Preferably, the UWB wireless positioning system works as follows:

[0029] S1: After the control board is powered on for use, the radio frequency chip, the control chip and the Bluetooth chip are used to detect the signals of the radio frequency chip and the control chip on the automobile digital key;

[0030] S2: Cooperate with the five groups of control boards assembled with the automobile shell, cooperate with the hyperbolic positioning principle, and form eight orientation areas in the intersection area;

[0031] S3: After the hyperbolic positioning is finished, triangular positioning is carried out for correction, and finally the collected data is simulated and corrected by low-pass filtering, Kalman filtering and other filtering algorithms to generate a positioning point, thereby improving the detection positioning effect.

[0032] Through the above structure, stable control and detection are formed during use, and the stability and accuracy of detection are improved.

[0033] Compared with the prior art, the beneficial effects of the present application are:

[0034] 1. The UWB wireless positioning system of the automobile digital key is provided with a base connected with a rubber pad for shock absorption assembly, and the rubber pad is assembled with a nesting piece to improve the stability of the component assembly of the control board in the later stage, and then the control board on the right front side of the inner surface of the automobile shell is assembled with a plurality of Bluetooth chips, and the remaining control boards are only assembled with radio frequency chips and control chips, and the components formed by the silica gel are arranged to improve the stability of the assembly and to stably cool down;

[0035] 2. The UWB wireless positioning system of the automobile digital key is provided with a moving piece for left and right center adjustment, a first silica gel pad, and a second silica gel pad assembled with a positioning piece, and the second silica gel pad is inclined, which can cooperate with the inward inclination of the clamping piece to improve the stability of the clamping use, and the clamping piece can be adjusted separately with a threaded rod to clamp and position in the vertical direction in the first clamping, thereby avoiding damage to the control board due to extrusion;

[0036] 3. The UWB wireless positioning system of the automobile digital key is provided with a control board and is assembled with a radio frequency chip, a control chip and a Bluetooth chip, and is respectively symmetrically assembled at the top of the left and right automobile housings inside the automobile housing, and based on the hyperbolic positioning principle, when the handheld automobile digital key enters the intersection area of eight orientation areas, a unique positioning result can be calculated by two UWB modules on a straight line in the area, and the hyperbolic positioning mode designed according to the eight orientation layout. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 It is a schematic diagram of the automobile housing half-section perspective structure of the present application;

[0038] Figure 2 It is a schematic diagram of the automobile housing perspective structure of the present application;

[0039] Figure 3 It is a schematic diagram of the base perspective structure of the present application;

[0040] Figure 4 It is a schematic diagram of the base half-section perspective structure of the present application;

[0041] Figure 5 It is a schematic diagram of the nested part partial-section perspective structure of the present application;

[0042] Figure 6 It is a schematic diagram of the control assembly partial-section perspective structure of the present application;

[0043] Figure 7 It is a schematic diagram of the connecting part perspective structure of the present application.

[0044] In the figure: 1, automobile housing; 2, rubber pad; 3, base; 4, nested part; 5, shock pad; 6, fixed plate; 7, positioning pin; 8, control assembly; 9, lead screw; 10, conveying belt; 11, moving part; 12, moving frame; 1201, first silica gel pad; 1202, positioning part; 1203, second silica gel pad; 13, threaded rod; 1301, sliding block; 1302, clamping part; 1303, third silica gel pad; 14, control board; 15, radio frequency chip; 16, control chip; 17, Bluetooth chip; 18, heat dissipation fin frame; 19, hanging ear; 20, heat dissipation frame; 21, fan; 22, nested ring; 23, protective shell; 24, clamping strip; 25, connecting part. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0046] Please refer to Figures 1-7 The application provides a technical scheme: a UWB wireless positioning system of a digital key of an automobile, which is provided with an automobile shell 1, and rubber pads 2 are uniformly assembled on the inner surface of the automobile shell 1;

[0047] It comprises a base 3 connected to one side of the outer surface of the rubber pad 2, and the base 3 is assembled on the inner surface of the automobile shell 1 by cooperating with a screw, and a nesting piece 4 is installed on the inner side of the outer surface of the base 3, and a shock pad 5 is connected in a nested manner on the inner surface of the nesting piece 4, and a fixing plate 6 is installed on the outer surface of the shock pad 5;

[0048] A positioning pin 7 is connected in a nested manner to the inner side of the outer surface of the fixing plate 6, and the other end of the positioning pin 7 is connected to a control assembly 8, and the inner surface of the control assembly 8 is rotatably connected to a lead screw 9, and one end of the outer surface of the lead screw 9 is rotatably connected to a conveyor belt 10;

[0049] The base 3 and the automobile shell 1 constitute a shock absorption structure through the rubber pad 2, and the automobile shell 1 and the base 3 constitute a threaded structure, and the base 3 and the shock pad 5 constitute a limiting nested structure through the nesting piece 4, and the shock pad 5 and the fixing plate 6 form a hollow structure.

[0050] The fixing plate 6 and the control assembly 8 constitute a limiting connection in a nested manner through the positioning pin 7, and the control assembly 8, the lead screw 9 and the conveyor belt 10 constitute a rotating structure in a nested manner, and the outer surface of the lead screw 9 is provided in a bidirectional symmetrical screw thread.

[0051] In use, the rubber pads 2 are assembled at the four corners and the top of the automobile shell 1, and the base 3 is installed by cooperating with the bolts, and the nesting piece 4 assembled on the outer side of the base 3 is used to connect the shock pad 5 in a nested manner, and the fixing plate 6 installed on the shock pad 5 is used to connect the positioning pin 7 in a nested manner, and the control assembly 8 is installed, which improves the stability of assembly, prevents collision and buffering by cooperating with the rubber pad 2 and the shock pad 5, and reduces the use of shock, improves the stability of the device, and then controls the rotation of the lead screw 9 on the control assembly 8.

[0052] A moving piece 11 is threadedly connected to the outer surface of the lead screw 9, and the moving piece 11 is slidably connected to the inner surface of the control assembly 8, and a moving frame 12 is installed on one side of the outer surface of the moving piece 11, and a threaded rod 13 is rotatably connected to the left and right sides of the outer surface of the moving frame 12, and a control board 14 is clamped and connected to the inner surface of the moving frame 12;

[0053] The radio frequency chip 15 is installed on one side of the outer surface of the control panel 14, and the control chip 16 and the Bluetooth chip 17 are installed on the outer surface of the control panel 14, and the outer surface of the Bluetooth chip 17 is connected with the heat dissipation fin rack 18, and the outer surface of the heat dissipation fin rack 18 is installed with the hanging ears 19 on the left and right sides, and the outer surface of the other group of hanging ears 19 is installed with the heat dissipation rack 20;

[0054] The fan 21 is rotationally connected to the inner surface of the middle end of the heat dissipation rack 20, and the outer surface of the heat dissipation rack 20 is installed with the nested ring 22, and the outer surface of the nested ring 22 is nested with the protective shell 23, and the outer surface of the protective shell 23 is connected with the clamping strip 24 on the inner side, and the outer surface of the clamping strip 24 is installed with the connecting piece 25.

[0055] The moving part 11 is slidably connected with the control assembly 8 through the lead screw 9, and the moving part 11 is embeddedly installed on the outer surface of the moving rack 12, and the moving rack 12 is rotationally connected with the threaded rod 13, and the inner surface of the moving rack 12 is shaped as an inclined structure.

[0056] The inner surface of the moving rack 12 is connected with the first silica gel pad 1201, and the inner surface of the moving rack 12 is connected with the positioning part 1202, and the outer surface of the positioning part 1202 is installed with the second silica gel pad 1203, and the second silica gel pad 1203 is connected with the moving rack 12 through the positioning part 1202 to form a limiting clamping structure.

[0057] The outer surface of the threaded rod 13 is threadedly connected with the sliding block 1301, and the outer surface of the sliding block 1301 is installed with the clamping part 1302, and the inner surface of the clamping part 1302 is limitingly connected with the third silica gel pad 1303.

[0058] The control panel 14 is integrally connected with the radio frequency chip 15, the control chip 16 and the Bluetooth chip 17, and the Bluetooth chip 17 is connected with the heat dissipation fin rack 18 to form a heat dissipation structure, and the heat dissipation fin rack 18 is integrally connected with the hanging ears 19, and the heat dissipation fin rack 18 is screwedly connected with the heat dissipation rack 20 through the hanging ears 19.

[0059] The heat dissipation rack 20 is limitingly nested with the protective shell 23 through the nested ring 22, and the protective shell 23 is clamped with the connecting piece 25 through the clamping strip 24, and the protective shell 23 is symmetrically arranged about the middle end of the outer surface of the connecting piece 25, and the connecting piece 25 is integrally connected with the automobile shell 1.

[0060] The working mode of the UWB wireless positioning system is as follows:

[0061] S1: After the control panel 14 is powered on for use, the radio frequency chip 15 and the control chip 16 on the automobile digital key are detected by the radio frequency chip 15, the control chip 16 and the Bluetooth chip 17;

[0062] S2:And five groups of control panels 14 assembled with the automobile shell 1, cooperate with the hyperbolic positioning principle, form eight orientation areas in the intersection area;

[0063] S3:And after the hyperbolic positioning is completed, triangular positioning will be carried out for position correction, and finally the collected data is simulated and corrected by low-pass filtering, Kalman filtering and other filtering algorithms to generate positioning points and improve the detection positioning effect.

[0064] The control screw 9 can control the synchronous adjustment of the conveying belt 10, the moving frame 12 installed on the threaded adjustment moving part 11 can be centrally adjusted, and the second silica gel pad 1203 installed on the first silica gel pad 1201 and the positioning part 1202 on the moving frame 12 can be centrally adjusted, and the control panel 14 is placed between the moving frames 12, and the left and right clamping is carried out, and the clamping of the moving frame 12 is carried out, and the positioning assembly is formed, and then the threaded rod 13 can be adjusted to rotate, and the clamping part 1302 installed on the sliding block 1301 and the third silica gel pad 1303 clamped on the inner surface of the clamping part 1302 can be centrally clamped, and the clamping stability is improved by cooperating with the inclined structure on the upper side of the inner surface of the clamping part 1302 and the inclined structure on the lower side of the inner surface of the moving frame 12, and the control panel 14 is clamped and protected, and the radio frequency chip 15, the control chip 16 and the Bluetooth chip 17 are assembled on the control panel 14, and the heat dissipation fin rack 18 is attached to the outer surface of the radio frequency chip 15, the control chip 16 and the Bluetooth chip 17, and the fan 21 built-in the heat dissipation rack 20 assembled with the hanging ear 19 is used for cooling treatment, and then the nested ring 22 assembled with the heat dissipation rack 20 can be nested in the inner surface of the protective shell 23, and the symmetrically arranged protective shell 23 is clamped and installed on the clamping strip 24 and the connecting piece 25 is arranged, and then when the radio frequency chip 15, the control chip 16 and the Bluetooth chip 17 are used for detection, eight cross areas are formed, the detection stability of the device is improved, and the protection and the use of the signal are increased.

[0065] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0066] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A UWB wireless positioning system for a car digital key, comprising a car shell (1) and rubber pads (2) uniformly assembled on the inner surface of the car shell (1); characterized in that include: The base (3) is connected to one side of the outer surface of the rubber pad (2), and the base (3) is assembled on the inner surface of the car body (1) with screws. The inner side of the outer surface of the base (3) is fitted with a nesting part (4), and the inner surface of the nesting part (4) is nested with a shock-absorbing pad (5). At the same time, the outer surface of the shock-absorbing pad (5) is fitted with a fixing plate (6). The positioning pin (7) is bonded and nested inside the outer surface of the fixing plate (6), and the other end of the positioning pin (7) is bonded to the control component (8), and the inner surface of the control component (8) is rotatably connected to the lead screw (9), while one end of the outer surface of the lead screw (9) is rotatably connected to the conveyor belt (10). The movable part (11) is threaded to the outer surface of the lead screw (9) and slidably connected to the inner surface of the control assembly (8). A movable frame (12) is installed on one side of the outer surface of the movable part (11), and a threaded rod (13) is rotatably connected to the left and right sides of the outer surface of the movable frame (12). At the same time, a control plate (14) is clamped and connected to the inner surface of the movable frame (12). An RF chip (15) is installed on one side of the outer surface of the control board (14), and a control chip (16) and a Bluetooth chip (17) are installed on the outer surface of the control board (14). A heat sink fin bracket (18) is connected to the outer surface of the Bluetooth chip (17), and hooks (19) are installed on the left and right sides of the outer surface of the heat sink fin bracket (18). Furthermore, a heat sink bracket (20) is installed on the outer surface of another set of hooks (19). The fan (21) is rotatably connected to the middle of the inner surface of the heat sink (20), and a nested ring (22) is installed on the outer surface of the heat sink (20). A protective shell (23) is nested on the outer surface of the nested ring (22), and a locking strip (24) is engaged on the inner side of the outer surface of the protective shell (23). A connector (25) is installed on the outer surface of the locking strip (24).

2. The UWB wireless positioning system of a digital key for a vehicle according to claim 1, characterized in that: The base (3) forms a shock-absorbing structure with the car body (1) through the rubber pad (2), and the car body (1) and the base (3) form a threaded structure. The base (3) forms a limiting nested structure with the shock-absorbing pad (5) through the nesting part (4), and the shock-absorbing pad (5) and the fixing plate (6) form a hollow structure.

3. The UWB wireless positioning system of a digital key for a vehicle according to claim 1, characterized in that: The fixed plate (6) forms a bonded nested limiting connection with the control component (8) through the positioning pin (7), and the control component (8) forms a nested rotating structure with the lead screw (9) and the conveyor belt (10), and the outer surface of the lead screw (9) is set with a bidirectional symmetrical thread.

4. The UWB wireless positioning system of a digital key for a vehicle according to claim 1, characterized in that: The movable part (11) forms a sliding structure with the control component (8) through the lead screw (9), and the movable part (11) and the outer side of the movable frame (12) are embedded and installed, and the movable frame (12) and the threaded rod (13) form a rotating structure. At the same time, the inner side of the outer surface of the movable frame (12) is inclined.

5. The UWB wireless positioning system of a digital key for a vehicle according to claim 1, characterized in that: The inner surface of the moving frame (12) is connected with a first silica gel pad (1201) through bonding, and the inner surface of the moving frame (12) is connected with a positioning piece (1202) through clamping, and the outer surface of the positioning piece (1202) is provided with a second silica gel pad (1203), and the second silica gel pad (1203) and the moving frame (12) form a limiting clamping structure through the positioning piece (1202).

6. The UWB wireless positioning system of a digital key for a vehicle according to claim 1, characterized in that: The outer surface of the threaded rod (13) is connected with a sliding block (1301) through threading, and the outer surface of the sliding block (1301) is provided with a clamping piece (1302), and the inner surface of the clamping piece (1302) is connected with a third silica gel pad (1303) through limiting.

7. The UWB wireless positioning system of a digital key for a vehicle according to claim 1, characterized in that: The control board (14), the radio frequency chip (15), the control chip (16) and the Bluetooth chip (17) form an integrated structure, the Bluetooth chip (17) and the heat dissipation fin rack (18) form a heat dissipation structure, and the heat dissipation fin rack (18) and the lug (19) form an integrated structure, and the heat dissipation fin rack (18) and the heat dissipation rack (20) form a bolted connection structure through the lug (19).

8. The UWB wireless positioning system of a digital key for a vehicle according to claim 1, characterized in that: The heat dissipation rack (20) and the protective shell (23) form a limiting nested structure through the nested ring (22), and the protective shell (23) and the connecting piece (25) form a clamping structure through the clamping strip (24), and the protective shell (23) is symmetrically arranged about the outer surface of the connecting piece (25), and the connecting piece (25) and the automobile shell (1) form an integrated structure.

9. The UWB wireless positioning system of a digital key for a vehicle according to claim 1, characterized in that The working mode of the UWB wireless positioning system is as follows: S1: After the control board (14) is powered on, the radio frequency chip (15) and the control chip (16) on the automobile digital key are detected through the radio frequency chip (15), the control chip (16) and the Bluetooth chip (17); S2: Five control boards (14) assembled with the automobile shell (1) are used in cooperation with the hyperbolic positioning principle to form eight orientation areas in the intersection area; S3: After the hyperbolic positioning is completed, triangular positioning is performed for position correction, and finally the collected data is simulated and corrected by a low-pass filter algorithm or a Kalman filter algorithm to generate a positioning point and improve the positioning effect.

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