Vehicle-mounted ultrasonic radar

Abstract

The embodiment of the utility model provides a vehicle-mounted ultrasonic radar which comprises an ultrasonic sensor, an analog-to-digital signal processing module, an LIN communication module, a control processing module, a power supply module, a transformer driving module and a transformer, and the transformer driving module is respectively connected with the control processing module, the power supply module and two ends of a primary winding of the transformer. The two ends of a secondary winding of the transformer are correspondingly connected with the ultrasonic sensors, and the transformer driving module is used for responding to a control instruction, converting initial voltage provided by the power supply module into wave sending driving voltage and then loading the wave sending driving voltage to a primary winding of the transformer. And the transformer amplifies the wave-generating driving voltage and then supplies the amplified wave-generating driving voltage to the ultrasonic sensor. According to the embodiment of the utility model, the wave-emitting driving voltage is amplified by the transformer and then is supplied to the ultrasonic sensor, so that the emission energy of the ultrasonic sensor is enhanced, farther-distance obstacle detection can be realized, an LIN (Local Interconnect Network) communication mode is reserved, a corresponding ECU (Electronic Control Unit) does not need to be additionally arranged, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of motor vehicle accessories, and in particular to a vehicle-mounted ultrasonic radar. Background Art

[0002] The vehicle-mounted ultrasonic radar transmits and receives ultrasonic waves through ultrasonic sensors, and then calculates the distance information of obstacles around the vehicle based on the time difference between transmitting and receiving ultrasonic waves, and gives the driver corresponding alarms and distance prompts. It is often used as a parking radar for motor vehicles.

[0003] Existing vehicle-mounted ultrasonic radars usually use LIN (Local Interconnect Network) communication modules to transmit signals within the vehicle system. However, the voltage that the LIN communication module can carry is limited. Therefore, the wave energy of the ultrasonic sensor is also limited, and the maximum detection distance can only reach 2 meters. In order to meet the user's demand for a longer detection distance, a common method is to use a GPIO (General-Purpose Input / Output) communication module or a DSI3 (Digital Speech Interpolation) communication module and equip it with a corresponding ECU (Electronic Control Unit) to control the GPIO communication module or DSI3 communication module separately, which can increase the maximum detection distance to 5 meters. However, the cost of equipping the ECU is relatively high, and the compatibility of DSI3 communication is poor, which is relatively inconvenient to use. Utility Model Content

[0004] The technical problem to be solved by the embodiment of the utility model is to provide a vehicle-mounted ultrasonic radar that adopts low-cost LIN communication to achieve longer-distance detection.

[0005] In order to solve the above technical problems, the embodiment of the utility model provides the following technical solutions: a vehicle-mounted ultrasonic radar, comprising:

[0006] An ultrasonic sensor, used for transmitting ultrasonic signals and receiving corresponding echo signals;

[0007] An analog-to-digital signal processing module, connected to the ultrasonic sensor, and used to convert the echo signal into a digital signal;

[0008] A LIN communication module, used to establish LIN communication with a vehicle computer system of a motor vehicle to receive control instructions issued by the vehicle computer system and to feed back the digital signal to the vehicle computer system;

[0009] a control processing module connected to the ultrasonic sensor, the analog-to-digital signal processing module and the LIN communication module, and configured to control the analog-to-digital signal processing module and the LIN communication module to work in coordination and control the ultrasonic sensor to transmit and receive ultrasonic waves according to the received control instructions; and

[0010] A power supply module, connected to the control processing module and connected to an external power supply;

[0011] The vehicle-mounted ultrasonic radar also includes: a transformer driving module and a transformer, wherein the transformer driving module is respectively connected to the control processing module, the power supply module and the two ends of the primary winding of the transformer, and the two ends of the secondary winding of the transformer are correspondingly connected to the ultrasonic sensor. The transformer driving module is used to respond to the control instruction to convert the initial voltage provided by the power supply module into a wave driving voltage and then load it to the primary winding of the transformer. The transformer amplifies the wave driving voltage and supplies it to the ultrasonic sensor.

[0012] Furthermore, the power supply module is a low voltage drop linear regulator.

[0013] Furthermore, the analog-to-digital signal processing module includes:

[0014] an analog signal processing unit, connected to the ultrasonic sensor, for filtering, amplifying and converting the echo signal into a digital signal; and

[0015] The digital signal processing unit is connected to the analog signal processing unit and is used to filter and amplify the digital signal processed by the analog signal processing unit.

[0016] Furthermore, the analog-to-digital signal processing module also includes an automatic threshold adjustment filter connected between the analog signal processing unit and the ultrasonic sensor, which is used to automatically adjust the threshold according to the environment to filter out noise and clutter.

[0017] Furthermore, the analog signal processing unit includes:

[0018] An analog signal filtering subunit connected to the ultrasonic sensor and used for filtering the echo signal;

[0019] an analog signal amplifying subunit connected to the analog signal filtering subunit and used for amplifying the analog signal obtained by filtering; and

[0020] An analog-to-digital conversion subunit connected to the analog signal amplification subunit is used to convert the amplified analog signal into a digital signal.

[0021] Furthermore, the digital signal processing unit comprises:

[0022] A digital signal filtering subunit connected to the analog signal processing unit and configured to filter the digital signal; and

[0023] A digital signal amplifying subunit connected between the digital signal filtering subunit and the LIN communication module for amplifying the digital signal obtained by filtering.

[0024] Furthermore, the vehicle-mounted ultrasonic radar also includes:

[0025] an analog data acquisition module connected to the analog signal processing unit and used for collecting and storing the amplified analog signal; and

[0026] A GPIO communication interface connected to the analog data acquisition module for externally exporting the amplified analog signal.

[0027] Furthermore, the power supply module, the control processing module, the LIN communication module, the analog-to-digital signal processing module, the analog data acquisition module and the GPIO communication interface are integrated into a main control chip.

[0028] Furthermore, the vehicle-mounted ultrasonic radar also includes a temperature sensor, which is connected to the control processing module and is used to detect the temperature of the main control chip in real time and feed back the temperature detection value to the control processing module. The control processing module determines the working status of the main control chip based on the temperature detection value.

[0029] Furthermore, the main control chip also integrates a pulse wave module which is respectively connected to the control processing module, the power supply module and the transformer drive module, and is used to convert the initial voltage provided by the power supply module into a pulse voltage under the control of the control processing module and then supply it to the transformer drive module.

[0030] After adopting the above technical scheme, the embodiment of the utility model has at least the following beneficial effects: the embodiment of the utility model connects a transformer driving module and a transformer between the output end of the power supply module and the ultrasonic sensor, and the control processing module controls the transformer driving module according to the control instruction of the vehicle system to convert the initial voltage provided by the power supply module into a wave driving voltage and load it to the primary winding of the transformer, and the transformer amplifies the wave driving voltage and then supplies it to the ultrasonic sensor. By increasing the wave driving voltage of the ultrasonic sensor, the emission energy of the ultrasonic sensor is enhanced, and obstacle detection at a longer distance can be achieved. At the same time, the LIN communication mode is retained, and there is no need to set up a corresponding ECU, thereby reducing the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1The figure is a schematic structural diagram of an optional embodiment of the vehicle-mounted ultrasonic radar of the utility model.

[0032] Figure 2 This is a schematic structural diagram of another optional embodiment of the vehicle-mounted ultrasonic radar of the utility model.

[0033] Figure 3 This is a schematic structural diagram of an analog signal processing unit of another optional embodiment of the vehicle-mounted ultrasonic radar of the utility model.

[0034] Figure 4 This is a structural schematic diagram of a digital signal processing unit of another optional embodiment of the vehicle-mounted ultrasonic radar of the utility model. DETAILED DESCRIPTION

[0035] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the present invention and are not intended to limit the present invention. In addition, the embodiments and features in the embodiments of the present application may be combined with each other without conflict.

[0036] like Figure 1-Figure 4 As shown, an optional embodiment of the utility model provides a vehicle-mounted ultrasonic radar, including:

[0037] Ultrasonic sensor 2, used for transmitting ultrasonic signals and receiving corresponding echo signals;

[0038] An analog-to-digital signal processing module 10, connected to the ultrasonic sensor 2, for converting the echo signal into a digital signal;

[0039] The LIN communication module 14 is used to establish LIN communication with the vehicle system of the motor vehicle to receive the control command issued by the vehicle system and to feed back the digital signal to the vehicle system;

[0040] a control processing module 16 connected to the ultrasonic sensor 2, the analog-to-digital signal processing module 10 and the LIN communication module 14, and configured to control the analog-to-digital signal processing module 10 and the LIN communication module 14 to work in coordination and control the ultrasonic sensor 2 to transmit and receive ultrasonic waves according to the received control instructions; and

[0041] A power supply module 12, connected to the control processing module 16 and connected to an external power source;

[0042] The vehicle-mounted ultrasonic radar also includes: a transformer driving module 4 and a transformer 3, wherein the transformer driving module 4 is respectively connected to the control processing module 16, the power supply module 12 and the two ends of the primary winding 30 of the transformer 3, and the two ends of the secondary winding 32 of the transformer 3 are correspondingly connected to the ultrasonic sensor 2. The transformer driving module 4 is used to respond to the control instruction to convert the initial voltage provided by the power supply module 12 into a wave driving voltage and then load it to the primary winding 30 of the transformer 3. The transformer 3 amplifies the wave driving voltage and supplies it to the ultrasonic sensor 2.

[0043] The embodiment of the utility model connects the transformer driving module 4 and the transformer 3 between the output end of the power supply module 12 and the ultrasonic sensor 2. The control processing module 16 controls the transformer driving module 4 to convert the initial voltage provided by the power supply module 12 into a wave driving voltage and loads it to the primary winding 30 of the transformer 3 according to the control instruction of the vehicle system. The transformer 3 amplifies the wave driving voltage and then supplies it to the ultrasonic sensor 2. By increasing the wave driving voltage of the ultrasonic sensor 2, the emission energy of the ultrasonic sensor 2 is enhanced, and obstacle detection at a longer distance can be achieved. At the same time, the LIN communication mode is retained, and there is no need to set up a corresponding ECU, which reduces the manufacturing cost. After actual testing, after the transformer 3 increases the driving voltage, the maximum distance that can be detected by this vehicle-mounted ultrasonic radar can reach 5 meters.

[0044] In another optional embodiment of the utility model, the power supply module 12 is a low voltage difference linear regulator. This embodiment uses a low voltage difference linear regulator 12 as a power supply module to ensure the stability of the output voltage. The output end of the low voltage difference linear regulator 12 is connected to the transformer driving module 4. The initial voltage of the input of the transformer driving module 4 is more stable, and the converted pulse driving voltage is also more accurate, which is conducive to the accurate fixed-point detection of the ultrasonic sensor 2.

[0045] In another optional embodiment of the present invention, Figure 2 As shown, the analog-to-digital signal processing module 10 includes:

[0046] an analog signal processing unit 101, connected to the ultrasonic sensor 2, for filtering, amplifying and converting the echo signal into a digital signal; and

[0047] The digital signal processing unit 103 is connected to the analog signal processing unit 101 and is used to filter and amplify the digital signal processed by the analog signal processing unit 101 .

[0048] The analog-to-digital signal processing module 10 in this embodiment filters, amplifies and converts the echo signal received from the ultrasonic sensor 2 into a digital signal through the analog signal processing unit 101. The digital signal is transmitted to the digital signal processing unit 103, and filtered and amplified to obtain the amplified digital signal, which is convenient for subsequent operation and processing of the digital signal data and accurately calculates the distance of the obstacle. In the specific implementation process, the analog signal processing unit 101 is connected to the positive and negative electrodes of the ultrasonic sensor 2 through the AINS pin and the AING pin respectively to receive the echo signal.

[0049] In another optional embodiment of the utility model, Figure 2 As shown, the analog-to-digital signal processing module 10 also includes an automatic threshold adjustment filter 105 connected between the analog signal processing unit 101 and the ultrasonic sensor 2, which is used to automatically adjust the threshold according to the environment to filter out noise and clutter. In this embodiment, by setting an automatic threshold adjustment filter 105 between the analog signal processing unit 101 and the ultrasonic sensor 2, it is convenient to automatically adjust the filter threshold according to the environmental noise, automatically lower the threshold in a low-noise environment, and automatically increase the threshold in a high-noise environment, so as to efficiently filter out noise and clutter.

[0050] In another optional embodiment of the present invention, Figure 3 As shown, the analog signal processing unit 101 includes:

[0051] The analog signal filtering subunit 1010 connected to the ultrasonic sensor 2 and used for filtering the echo signal:

[0052] an analog signal amplifying subunit 1012 connected to the analog signal filtering subunit 1010 and used for amplifying the analog signal obtained by filtering; and

[0053] The analog-to-digital conversion subunit 1014 is connected to the analog signal amplification subunit 1012 and is used to convert the amplified analog signal into a digital signal.

[0054] The analog signal processing unit 101 in this embodiment includes an analog signal filtering subunit, an analog signal amplifying subunit 1012 and an analog-to-digital conversion subunit 1014, which are used to filter, amplify and convert the analog signal into a digital signal, reduce analog signal data redundancy, and convert it into a digital signal to improve the efficiency of subsequent data transmission and calculation.

[0055] In another optional embodiment of the present invention, Figure 4 As shown, the digital signal processing unit 103 includes:

[0056] A digital signal filtering subunit 1030 connected to the analog signal processing unit 101 and configured to filter the digital signal; and

[0057] A digital signal amplifying subunit 1032 connected between the digital signal filtering subunit 1030 and the LIN communication module 14 is used to amplify the digital signal obtained by filtering.

[0058] The digital signal processing unit 103 in this embodiment includes a digital signal filtering subunit 1030 and a digital signal amplifying subunit 1032. The digital signal filtering subunit 1030 filters out noise clutter according to a corresponding algorithm to accurately obtain effective digital signals and improve the detection accuracy of obstacles. The digital signal amplifying subunit 1032 amplifies the effective digital signal obtained by filtering to facilitate data measurement and improve detection efficiency. In the specific implementation process, a fast time algorithm can be used to filter out clutter. Accurately extract effective digital signals.

[0059] In another optional embodiment of the present invention, Figure 2 As shown, the vehicle-mounted ultrasonic radar also includes:

[0060] An analog data acquisition module 18 connected to the analog signal processing unit 101 for collecting and storing the amplified analog signal; and

[0061] A GPIO communication interface 19 is connected to the analog data acquisition module 18 and is used to export the amplified analog signal to the outside.

[0062] In this embodiment, the analog data acquisition module 18 collects the analog signal amplified by the analog signal processing unit 101, and exports the amplified analog signal to the outside through the corresponding GPIO communication interface 19, so as to facilitate the design of the primary analysis data model in the later stage.

[0063] In another optional embodiment of the present invention, Figure 2 As shown, the power supply module 12, the control processing module 16, the LIN communication module 14, the analog-to-digital signal processing module 10, the analog data acquisition module 18, and the GPIO communication interface 19 are integrated into a main control chip 1. In this embodiment, by integrating the power supply module 12, the control processing module 16, the LIN communication module 14, the analog-to-digital signal processing module 10, the analog data acquisition module 18, and the GPIO communication interface 19 into a main control chip 1, compared with the traditional enameled wire core probe, the embodiment has high integration, can be automatically produced, has a simple process flow, and has high reliability.

[0064] In another optional embodiment of the present invention, Figure 1-Figure 2As shown, the vehicle-mounted ultrasonic radar also includes a temperature sensor 5, which is connected to the control processing module 16 and is used to detect the temperature of the main control chip 1 in real time and feed back the temperature detection value to the control processing module 16, and the control processing module 16 determines the working state of the main control chip 1 according to the temperature detection value. In this embodiment, the temperature sensor 5 detects the temperature of the main control chip 1 in real time and feeds back the temperature detection value, and the control processing module 16 determines the working state of the main control chip 1 according to the temperature detection value, so that the user can know the state of the main control chip 1 and troubleshoot in time.

[0065] In another optional embodiment of the present invention, Figure 1-Figure 2 As shown, the main control chip 1 is also integrated with a pulse wave module 17 connected to the control processing module 16, the power supply module 12 and the transformer driving module 4 respectively, which is used to convert the initial voltage provided by the power supply module 12 into a pulse voltage under the control of the control processing module 16 and then supply it to the transformer driving module 4. In this embodiment, the pulse wave module 17 is respectively connected to the control processing module 16, the power supply module 12 and the transformer driving module 4, and is used to respond to the control instruction of the control processing module 16 to convert the initial voltage provided by the power supply module 12 into a pulse voltage and supply it to the transformer driving module 4. The transformer driving module 4 converts the pulse voltage into a wave driving voltage and loads it to the primary winding 30 of the transformer 3, and loads the amplified voltage to the positive and negative poles of the ultrasonic sensor 2 through the secondary winding 32 of the transformer 3, so as to realize the wave control of the ultrasonic sensor 2.

[0066] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many variations without departing from the scope of protection of the purpose of the present invention and the claims, which all fall within the scope of protection of the present invention.

Claims

1. A vehicle-mounted ultrasonic radar, comprising: An ultrasonic sensor, used for transmitting ultrasonic signals and receiving corresponding echo signals; An analog-to-digital signal processing module, connected to the ultrasonic sensor, and used to convert the echo signal into a digital signal; A LIN communication module, used to establish LIN communication with a vehicle computer system of a motor vehicle to receive control instructions issued by the vehicle computer system and to feed back the digital signal to the vehicle computer system; A control processing module, connected to the ultrasonic sensor, the analog-to-digital signal processing module and the LIN communication module, for controlling the analog-to-digital signal processing module and the LIN communication module to work together and controlling the ultrasonic sensor to send and receive ultrasonic waves according to the received control instructions; as well as A power supply module, connected to the control processing module and connected to an external power supply; It is characterized in that the vehicle-mounted ultrasonic radar also includes: a transformer driving module and a transformer, wherein the transformer driving module is respectively connected to the control processing module, the power supply module and the two ends of the primary winding of the transformer, and the two ends of the secondary winding of the transformer are correspondingly connected to the ultrasonic sensor. The transformer driving module is used to respond to the control instruction to convert the initial voltage provided by the power supply module into a wave driving voltage and then load it to the primary winding of the transformer. The transformer amplifies the wave driving voltage and supplies it to the ultrasonic sensor.

2. The vehicle-mounted ultrasonic radar according to claim 1, characterized in that: The power supply module is a low voltage drop linear regulator.

3. The vehicle-mounted ultrasonic radar according to claim 1, characterized in that: The analog-to-digital signal processing module comprises: an analog signal processing unit, connected to the ultrasonic sensor, for filtering, amplifying and converting the echo signal into a digital signal; and The digital signal processing unit is connected to the analog signal processing unit and is used to filter and amplify the digital signal processed by the analog signal processing unit.

4. The vehicle-mounted ultrasonic radar according to claim 3, characterized in that: The analog-to-digital signal processing module also includes an automatic threshold adjustment filter connected between the analog signal processing unit and the ultrasonic sensor, which is used to automatically adjust the threshold according to the environment to filter out noise and clutter.

5. The vehicle-mounted ultrasonic radar according to claim 3, characterized in that: The analog signal processing unit comprises: An analog signal filtering subunit connected to the ultrasonic sensor and used for filtering the echo signal; an analog signal amplifying subunit connected to the analog signal filtering subunit and used for amplifying the analog signal obtained by filtering; and An analog-to-digital conversion subunit connected to the analog signal amplification subunit is used to convert the amplified analog signal into a digital signal.

6. The vehicle-mounted ultrasonic radar according to claim 3, characterized in that: The digital signal processing unit comprises: A digital signal filtering subunit connected to the analog signal processing unit and configured to filter the digital signal; and A digital signal amplifying subunit connected between the digital signal filtering subunit and the LIN communication module for amplifying the digital signal obtained by filtering.

7. The vehicle-mounted ultrasonic radar according to claim 3, characterized in that: The vehicle-mounted ultrasonic radar also includes: an analog data acquisition module connected to the analog signal processing unit and used for collecting and storing the amplified analog signal; and A GPIO communication interface connected to the analog data acquisition module for externally exporting the amplified analog signal.

8. The vehicle-mounted ultrasonic radar according to claim 7, characterized in that: The power supply module, the control processing module, the LIN communication module, the analog-to-digital signal processing module, the analog data acquisition module and the GPIO communication interface are integrated into a main control chip.

9. The vehicle-mounted ultrasonic radar according to claim 8, characterized in that: The vehicle-mounted ultrasonic radar also includes a temperature sensor, which is connected to the control processing module and is used to detect the temperature of the main control chip in real time and feed back the temperature detection value to the control processing module. The control processing module determines the working status of the main control chip based on the temperature detection value.

10. The vehicle-mounted ultrasonic radar according to claim 8, characterized in that: The main control chip also integrates a pulse wave module which is respectively connected to the control processing module, the power supply module and the transformer driving module, and is used to convert the initial voltage provided by the power supply module into a pulse voltage under the control of the control processing module and then supply it to the transformer driving module.

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