Host-free vehicle-mounted radar

Abstract

The utility model provides a host-free vehicle-mounted radar. The host-free vehicle-mounted radar comprises a connector, a lead, a circuit board, a metal sheet, a shell body and an inductor, the connector is connected with the circuit board through the lead wire, the circuit board is fixedly connected with one surface of the metal sheet through a PIN needle of the metal sheet, the shell body is bonded with the other surface of the metal sheet through a conductive bonding material, the inductor is arranged at the tail end of the shell body and is provided with a lead wire, and the inductor is connected with the circuit board through the lead wire. One end of the lead is provided with a pin type connector which is welded on a circuit board, and the circuit board is fixedly connected with the shell body through screws. The host-free vehicle-mounted radar does not need an ultrasonic boost driver, and is few in components, high in integration level and lower in cost. In addition, the host-free vehicle-mounted radar is installed on the vehicle through the connector, installation is more convenient and faster, adjustment is convenient, and better adaptability is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle-mounted radars, and in particular to a hostless vehicle-mounted radar. Background Art

[0002] Vehicle-mounted radar is an essential device to ensure vehicle driving safety. Traditional vehicle-mounted radar generally includes a control box, multiple sensors and at least one alarm device. The multiple sensors are connected to the control box respectively and work in coordination with each other under the control of the control box. Each sensor detects the distance data of the obstacle and transmits it to the control box for processing and analysis. When the distance to the obstacle reaches the corresponding alarm condition, the controller drives the alarm device to provide the driver with alarm prompt information. For this type of vehicle-mounted radar, the control box costs a large proportion, and the wiring harness from the control box to each sensor is long, which increases the cost and is also more likely to introduce external interference from the wiring harness and affect product performance.

[0003] The existing patent document discloses a host-free reversing radar system (application number: CN2014104608904), and the radar system disclosed in the patent includes 2-4 sensors and an alarm device. Each sensor includes an ID pin, a ground pin, a data pin and a power pin, and the data pin of each sensor is respectively connected to a communication bus, and the ground pin and the power pin of each sensor are respectively connected to the ground wire and the power wire; one of the sensors is used as a master sensor, and the other sensors are used as slave sensors. The ID pin of the master sensor is connected to the alarm device, and the ID pin of the slave sensor is connected to the ground wire, the communication bus or not connected. Each sensor assigns an address to itself according to the connection state of its own ID pin; the master sensor sends a working instruction to each slave sensor through the communication bus, and each slave sensor obtains sensor data and sends the sensor data to the master sensor through its own data pin. The master sensor processes the sensor data obtained by itself and the received sensor data to obtain a control instruction, and sends the control instruction to the alarm device through its own ID pin, and the alarm device executes the control instruction.

[0004] Although the hostless reversing radar system recorded in the existing patent documents can be realized without a host, the radar hardware is still implemented using many discrete components such as AD converters, MCUs, ultrasonic drivers, bus transceivers, AD and OP converters, etc., and the component integration is not high. The material management in the production process is complicated and costly. The ultrasonic echo signal is a small analog signal. In the signal filtering and amplifying circuit built with discrete components, it is easily interfered by external electromagnetic waves, which affects the system performance and even causes functional failure. Utility Model Content

[0005] This application provides a hostless vehicle-mounted radar to reduce the overall cost of the radar system. The specific solution is as follows:

[0006] The utility model provides a hostless vehicle-mounted radar comprising: a connector, a lead, a circuit board, a metal sheet, a shell body and a sensor;

[0007] The connector is connected to the circuit board through the lead, the circuit board is fixedly connected to one side of the metal sheet through the PIN pin of the metal sheet, the shell body is bonded to the other side of the metal sheet through a conductive adhesive material, the sensor is arranged at the end of the shell body and is provided with a lead, one end of the lead has a pin connector welded on the circuit board, and the circuit board is fixedly connected to the shell body by screws.

[0008] Optionally, the shell body is provided with screw holes, the circuit board is provided with through-hole pads, and screws pass through the screw holes and the through-hole pads to fix the shell body and the circuit board.

[0009] Optionally, a metal coating is provided on the surface of the shell body.

[0010] Optionally, the connector is connected to the vehicle wiring harness in a lead-wire or PIN-type manner.

[0011] Optionally, the electrode plate is provided with an ultrasonic-specific driving and information processing module, a power supply module, a filtering circuit, a buzzer driving circuit, an echo processing circuit and an EMC protection module;

[0012] Among them, the output of the sensor is respectively connected to the input of the echo processing circuit and the ultrasonic dedicated drive and information processing module, the output of the echo processing circuit is connected to the input of the ultrasonic dedicated drive and information processing module, the output of the ultrasonic dedicated drive and information processing module is connected to the input of the filter circuit and the buzzer drive circuit, the output of the filter circuit and the buzzer drive circuit is connected to the EMC protection module, the power supply module is connected to the EMC protection module and the ultrasonic dedicated drive and information processing module, the power supply end of the EMC protection module is connected to VDD, and the ground end is connected to GND, the ultrasonic dedicated drive and information processing module is provided with a LIN interface, and the LIN interface is provided with an EMC protection module.

[0013] Optionally, the ultrasonic dedicated drive and information processing module is composed of an ultrasonic ranging dedicated chip and peripheral circuit elements, and also integrates an ultrasonic boost driver, a 32-bit MCU, 64kByte memory, 4kByte SRAM and 4 peripheral GPIO interfaces.

[0014] Optionally, the LIN interface includes a LIN1 interface and a LIN2 interface, and the LIN1 interface and the LIN2 interface support slave node position detection.

[0015] Optionally, the echo processing circuit adopts a dual-path RC series circuit.

[0016] Optionally, the EMC protection circuit includes a surge protection element, an electrostatic suppression element and a filter element.

[0017] Optionally, the filtering circuit includes a LIN1 filtering circuit and a LIN2 filtering circuit, both of which are RC filtering circuits composed of resistor-capacitor elements.

[0018] The present application provides a hostless vehicle-mounted radar comprising: a connector, a lead, a circuit board, a metal sheet, a shell body with a metal coating and a sensor; the connector is connected to the circuit board through a lead, the circuit board is fixedly connected to one side of the metal sheet through a PIN pin provided by the metal sheet, the shell body is bonded to the other side of the metal sheet through a conductive adhesive material, the sensor is arranged at the end of the shell body, and is provided with a lead, one end of the lead has a pin connector welded on the circuit board, and the circuit board is fixedly connected to the shell body by screws. The hostless vehicle-mounted radar of the present application does not require an ultrasonic boost driver, has fewer components, a high degree of integration, and a lower cost. In addition, the hostless vehicle-mounted radar of the present application is installed on the vehicle through a connector, which is more convenient and quick to install, easy to adjust, and has better adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic diagram of a hostless vehicle-mounted radar provided in an embodiment of the present application;

[0021] Figure 2 A schematic diagram of the circuits of various modules provided on a circuit board provided in an embodiment of the present application. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] It should be noted that the terms "including" and "having" and any variations thereof in the embodiments of the present application and the accompanying drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0024] like Figure 1 As shown, a hostless vehicle-mounted radar of the present application includes: a connector, a lead, a circuit board, a metal sheet, a housing body and a sensor;

[0025] The connector is connected to the circuit board through the lead, the circuit board is fixedly connected to one side of the metal sheet through the PIN pin of the metal sheet, the shell body is bonded to the other side of the metal sheet through a conductive adhesive material, the sensor is arranged at the end of the shell body and is provided with a lead, one end of the lead has a pin connector welded on the circuit board, and the circuit board is fixedly connected to the shell body by screws.

[0026] Among them, the sensor can be customized according to customer needs. For example, key parameters such as diameter, operating frequency, sensitivity, residual vibration size, horizontal and vertical angles covered by FOV, operating temperature, etc. can meet the customized needs of customers.

[0027] refer to Figure 1 The hostless vehicle-mounted radar in this application is installed on the vehicle through a connector. The sensor uses a vehicle-mounted ultrasonic sensor to detect obstacles around the vehicle and transmit the echo signal of the detected obstacle to the circuit board. The distance information or alarm prompt information is processed by the circuit-specific software on the circuit board and transmitted to the vehicle instrument through the LIN transmission line. Then the instrument emits an alarm tone or displays a picture to inform the driver of the driving situation, which can improve driving safety. The function of the metal sheet is to connect the metal-coated shell body and the circuit board so that the two are fully grounded. The circuit board and the metal sheet of this application are fixedly connected by a PIN pin, which can improve the stability of the circuit board and the metal sheet. The hostless vehicle-mounted radar of this application uses fewer components, has a higher degree of integration, and has a lower overall cost.

[0028] It is worth mentioning that the metal sheet of the present application is formed by die stamping and bending. In the connection method of the shell body, the metal sheet and the circuit board, the metal sheet and the inner surface of the shell body are adhered to the lower surface of the metal sheet through a conductive adhesive material on the one hand, and the elastic structure of the metal sheet itself is in extrusion contact with the inside of the shell body on the other hand. The metal sheet and the circuit board are connected by welding through the PIN needles of the metal sheet, and on the other hand, the screw holes reserved in the metal-coated shell are fixed and connected to the through-hole pads of the circuit board by screws. In this way, the connection strength and grounding reliability among the metal-coated shell, the metal sheet and the circuit board are guaranteed.

[0029] The present application provides a hostless vehicle-mounted radar comprising: a connector, a lead, a circuit board, a metal sheet, a shell body and a sensor; the connector is connected to the circuit board through a lead, the circuit board is fixedly connected to one side of the metal sheet through a PIN pin provided by the metal sheet, the shell body is bonded to the other side of the metal sheet through a conductive adhesive material, the sensor is arranged at the end of the shell body, and is provided with a lead, one end of the lead has a pin connector welded on the circuit board, and the circuit board is fixedly connected to the shell body by screws. The hostless vehicle-mounted radar of the present application does not require an ultrasonic boost driver, has fewer components, a high degree of integration, and lower cost. In addition, the hostless vehicle-mounted radar of the present application is installed on the vehicle through a connector, which is more convenient and quick to install, easy to adjust, and has better adaptability.

[0030] In a specific embodiment, the shell body is provided with screw holes, the circuit board is provided with through-hole pads, and screws pass through the screw holes and the through-hole pads to fix the shell body and the circuit board.

[0031] It is worth noting that: screw holes are provided on the shell body, and through-hole pads are also provided on the circuit board. The screws pass through the screw holes, and the through-hole pads and nuts are matched to fix the circuit board and the shell body, making the interior of the hostless vehicle-mounted radar more stable.

[0032] In a specific embodiment, a metal coating is provided on the surface of the shell body.

[0033] It is worth noting that the metal coating layer has the function of resisting electromagnetic interference. The shell body of the present application is firstly injection molded by a self-owned mold, and then covered with a metal coating by a surface coating process. In this way, the hostless vehicle-mounted radar has stronger EMC protection performance through the protection of the shell body provided with a metal coating, so that the hostless vehicle-mounted radar has an excellent shielding protection effect against the electromagnetic interference radiated by other electrical equipment in the vehicle, and solves the problem that the radar is susceptible to electromagnetic interference radiated by other electrical equipment in the vehicle during actual use.

[0034] In a specific embodiment, the connector is connected to the vehicle wiring harness in a lead-wire or PIN-type manner.

[0035] It is worth noting that the connector in this application can fix the hostless vehicle-mounted radar on the vehicle through lead wire or PIN pin. The specific method can be adjusted according to customer needs. When installing, it can be installed from the outside of the vehicle bumper to the inside. Compared with the installation method of adhesive backing + bracket in the prior art, the connector of this application is easy to adjust, has better adaptability, and is more flexible and convenient to install.

[0036] In a specific embodiment, Figure 2 As shown, the electrode plate is provided with an ultrasonic-specific driving and information processing module, a power supply module, a filtering circuit, a buzzer driving circuit, an echo processing circuit and an EMC protection module;

[0037] Among them, the output of the sensor is respectively connected to the input of the echo processing circuit and the ultrasonic dedicated drive and information processing module, the output of the echo processing circuit is connected to the input of the ultrasonic dedicated drive and information processing module, the output of the ultrasonic dedicated drive and information processing module is connected to the input of the filter circuit and the buzzer drive circuit, the output of the filter circuit and the buzzer drive circuit is connected to the EMC protection module, the power supply module is connected to the EMC protection module and the ultrasonic dedicated drive and information processing module, the power supply end of the EMC protection module is connected to VDD, and the ground end is connected to GND, the ultrasonic dedicated drive and information processing module is provided with a LIN interface, and the LIN interface is provided with an EMC protection module.

[0038] exist Figure 2 In the process, the sensor senses the surrounding environment information or obstacle information to generate ultrasonic signals and feeds them back to the ultrasonic dedicated drive and information processing module and the echo processing circuit. The echo processing circuit performs echo processing on the ultrasonic signal to generate an echo signal and sends it to the ultrasonic dedicated drive and information processing module. The ultrasonic dedicated drive and information processing module samples and performs algorithm analysis on the echo signal to generate a response signal and sends it to the filter circuit and the buzzer drive circuit. The buzzer drive circuit drives the buzzer to vibrate, thereby making a sound to remind the driver to pay attention to the driving situation. The filter circuit mainly filters the signals transmitted or received by itself, while the EMC protection module protects the overall circuit, prevents surges and suppresses static electricity. In addition, it also has a certain filtering effect. The power module provides power for all modules on the entire circuit board, and also provides power for the sensor.

[0039] In a specific embodiment, the ultrasonic dedicated drive and information processing module is composed of an ultrasonic ranging dedicated chip and peripheral circuit elements, and also integrates an ultrasonic boost driver, a 32-bit MCU, 64kByte memory, 4kByte SRAM and 4 peripheral GPIO interfaces.

[0040] It is worth noting that the ultrasonic dedicated drive and information processing module of this application can be composed of a new generation of mass-produced automotive-grade ultrasonic ranging dedicated integrated chip and its peripheral circuit components. The ultrasonic ranging dedicated integrated chip has a small package volume, has 2 standard LIN interfaces, the LIN interface internally supports slave node position detection, and the chip can control the hardware connection and shutdown between the two LIN channels. In addition, in addition to the integrated ultrasonic boost driver, the chip also integrates a 32-bit MCU, 64kByte memory, 4kByte SRAM, 4 peripheral GPIO interfaces and has PWM function.

[0041] In a specific embodiment, the LIN interface includes a LIN1 interface and a LIN2 interface, and the LIN1 interface and the LIN2 interface support slave node position detection.

[0042] It is worth noting that: on the LIN communication line, each hostless vehicle-mounted radar is assigned an ID as a symbol of identity. The LIN interface supports slave node position detection, which means that it supports ID identification of hostless vehicle-mounted radar. If one LIN interface fails to receive or send, the signal path is blocked. The two LIN interfaces in this application can ensure normal signal reception and transmission.

[0043] In a specific embodiment, the echo processing circuit adopts a dual RC series circuit.

[0044] It is worth mentioning that the dual-path RC series circuit is a commonly used echo processing circuit. The circuit is mainly composed of resistors and capacitors. The circuit combination is simple, uses fewer components, and has lower energy consumption, which can improve the integration of the circuit board.

[0045] In a specific embodiment, the EMC protection circuit includes a surge protection element, an electrostatic suppression element and a filter element.

[0046] It is worth mentioning that: EMC protection circuit can ensure the reliability of electronic equipment. Hostless vehicle-mounted radar will generate electromagnetic radiation and electromagnetic interference when working. If these radiation and interference exceed certain limits, it will affect the normal operation of the equipment and even cause damage to the equipment. EMC can reduce electromagnetic radiation and interference by designing appropriate circuits, thereby ensuring the reliability of the equipment. EMC protection is mainly reflected in three aspects: electromagnetic radiation control, electromagnetic compatibility design, and power supply noise control. The present application can adopt mature EMC protection circuits, mainly including surge protection components, electrostatic suppression components and filtering components. These components are low in cost and simple in structure, which can reduce the cost of hostless vehicle-mounted radar.

[0047] In a specific embodiment, the filter circuit includes a LIN1 filter circuit and a LIN2 filter circuit, both of which are RC filter circuits composed of resistor and capacitor elements.

[0048] It is worth noting that the chip used in the ultrasonic dedicated drive and information processing module in this application can be set to two channels, corresponding to two standard LIN interfaces.

[0049] Those skilled in the art can understand that the accompanying drawings are only schematic diagrams of one embodiment, and the modules or processes in the accompanying drawings are not necessarily required to implement the present application.

[0050] Those skilled in the art can understand that the modules in the device in the embodiment can be distributed in the device in the embodiment according to the description of the embodiment, or can be changed accordingly and located in one or more devices different from the embodiment. The modules in the above embodiment can be combined into one module, or can be further divided into multiple sub-modules.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A hostless vehicle-mounted radar, characterized in that: include: Connectors, leads, circuit boards, metal sheets, housing bodies and inductors; The connector is connected to the circuit board through the lead, the circuit board is fixedly connected to one side of the metal sheet through the PIN pin of the metal sheet, the shell body is bonded to the other side of the metal sheet through a conductive adhesive material, the sensor is arranged at the end of the shell body and is provided with a lead, one end of the lead has a pin connector welded on the circuit board, and the circuit board is fixedly connected to the shell body by screws.

2. The hostless vehicle-mounted radar according to claim 1, characterized in that: The shell body is provided with a screw hole, the circuit board is provided with a through-hole pad, and a screw passes through the screw hole and the through-hole pad to fix the shell body and the circuit board.

3. The hostless vehicle-mounted radar according to claim 1, characterized in that: The surface of the shell body is provided with a metal coating.

4. The hostless vehicle-mounted radar according to claim 1, characterized in that: The connection mode between the connector and the vehicle wiring harness is lead wire type or PIN needle type.

5. The hostless vehicle-mounted radar according to claim 1, characterized in that: The circuit board is provided with an ultrasonic-specific driving and information processing module, a power supply module, a filtering circuit, a buzzer driving circuit, an echo processing circuit and an EMC protection module; Among them, the output of the sensor is respectively connected to the input of the echo processing circuit and the ultrasonic dedicated drive and information processing module, the output of the echo processing circuit is connected to the input of the ultrasonic dedicated drive and information processing module, the output of the ultrasonic dedicated drive and information processing module is connected to the input of the filter circuit and the buzzer drive circuit, the output of the filter circuit and the buzzer drive circuit is connected to the EMC protection module, the power supply module is connected to the EMC protection module and the ultrasonic dedicated drive and information processing module, the power supply end of the EMC protection module is connected to VDD, and the ground end is connected to GND, the ultrasonic dedicated drive and information processing module is provided with a LIN interface, and the LIN interface is provided with an EMC protection module.

6. The hostless vehicle-mounted radar according to claim 5, characterized in that: The ultrasonic dedicated drive and information processing module is composed of an ultrasonic distance measurement dedicated chip and peripheral circuit components, and also integrates an ultrasonic boost driver, a 32-bit MCU, a 64kByte memory, a 4kByte SRAM and 4 peripheral GPIO interfaces.

7. The hostless vehicle-mounted radar according to claim 5, characterized in that: The LIN interface includes a LIN1 interface and a LIN2 interface, and the LIN1 interface and the LIN2 interface support slave node position detection.

8. The hostless vehicle-mounted radar according to claim 5, characterized in that: The echo processing circuit adopts a dual-path RC series circuit.

9. The hostless vehicle-mounted radar according to claim 5, characterized in that: The EMC protection module includes a surge protection element, an electrostatic suppression element and a filter element.

10. The hostless vehicle-mounted radar according to claim 5, characterized in that: The filter circuit includes a LIN1 filter circuit and a LIN2 filter circuit, both of which are RC filter circuits composed of resistor and capacitor elements.

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