A circuit for identifying tire pattern

Abstract

The utility model discloses a circuit for identifying tire patterns, comprising a programmable logic control unit and a power conversion unit, wherein the power conversion unit converts a 5V power supply to a required voltage value to supply power to the programmable logic control unit, and further comprising: an image acquisition unit, which can acquire tire pattern image information of a local position of the tire pattern at a time point, continuously acquire tire pattern image information of multiple local positions of the tire pattern within a time period, and send the tire pattern image information to the programmable logic control unit to achieve high-efficiency acquisition of tire pattern image information; the programmable logic control unit processes the received tire pattern image information to obtain tire pattern data; a DVP output unit and an HDMI output unit, wherein the programmable logic control unit sends the processed tire pattern data to a display through the DVP output unit and the HDMI output unit for display.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuits, in particular to a circuit for identifying tire patterns. Background Art

[0002] The traditional tire pattern recognition solution is implemented through a point-type infrared laser ranging sensor. This solution requires a servo motor to move the point-type infrared laser ranging sensor left and right, resulting in the time for identifying the tire pattern relying on the moving speed of the servo motor. The speed cannot be too fast or too slow. If it is too fast, the recognition data will be inaccurate, and if it is too slow, the recognition time will be too long, thus affecting the recognition efficiency. Utility Model Content

[0003] The utility model aims to provide a circuit for identifying tire patterns, which can accurately and efficiently identify tire pattern data.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A circuit for identifying tire patterns, comprising a programmable logic control unit and a power conversion unit, wherein the power conversion unit converts a 5V power supply to a required voltage value to supply power to the programmable logic control unit, and further comprising:

[0006] The image acquisition unit can acquire tire pattern image information of a local position of the tire pattern at a time point, continuously acquire the tire pattern image information of multiple local positions of the tire pattern within a time period, and send the tire pattern image information to the programmable logic control unit, thereby realizing efficient acquisition of tire pattern image information;

[0007] The programmable logic control unit processes the received tire pattern image information to obtain tire pattern data;

[0008] The programmable logic control unit sends the processed tire pattern data to a display through the DVP output unit and the HDMI output unit for display.

[0009] The beneficial effects of the utility model are as follows:

[0010] 1. By directly shooting the image of the tire pattern with the NOIP2SE1300A camera, the local image information of the tire pattern can be accurately obtained, and then the collected image information of the tire pattern is processed by the programmable logic control unit EP4CE15F17C8N to obtain accurate data information of the tire pattern. The data is completely processed in the programmable logic control unit EP4CE15F17C8N and will not occupy the time for the NOIP2SE1300A camera to collect images.

[0011] 2. NOIP2SE1300A camera can capture images of local tire patterns in an instant. NOIP2SE1300A camera continuously collects tire pattern image information at multiple local positions of the tire pattern within a period of time, and efficiently collects tire pattern images. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A block diagram of the circuit for identifying tire tread patterns of the utility model;

[0013] Figure 2 A circuit diagram of a power conversion unit for providing a 1.2V power supply according to the utility model;

[0014] Figure 3 A circuit diagram of a power conversion unit for providing a 1.8V power supply according to the utility model;

[0015] Figure 4 A circuit diagram of a power conversion unit for providing a 2.5V power supply according to the utility model;

[0016] Figure 5 A circuit diagram of a power conversion unit for providing a 3.3V power supply according to the utility model;

[0017] Figure 6 A circuit diagram of a solidified storage unit of the utility model;

[0018] Figure 7 A circuit diagram of a storage unit of the utility model;

[0019] Figure 8 A circuit diagram of a connector for connecting an image sensor according to the utility model;

[0020] Fig. 9 A circuit diagram of the HDMI of the utility model;

[0021] Fig.10 This is a circuit diagram of the DVP output interface of the utility model;

[0022] Fig.11FIG EP4CE15F17C8N is a first part of the utility model;

[0023] Fig.12 FIG is a second portion of the utility model EP4CE15F17C8N;

[0024] Fig.13 FIG is a third portion of the utility model EP4CE15F17C8N;

[0025] Fig.14 FIG is a fourth portion of the utility model EP4CE15F17C8N;

[0026] Fig.15 FIG is a fifth portion of the utility model EP4CE15F17C8N;

[0027] Fig.16 FIG is a sixth portion of the utility model EP4CE15F17C8N;

[0028] Fig.17 FIG is a seventh portion of the utility model EP4CE15F17C8N;

[0029] Fig.18 FIG is an eighth portion of the utility model EP4CE15F17C8N;

[0030] Fig.19 FIG is a ninth portion of the utility model EP4CE15F17C8N;

[0031] Fig. 20 This is a diagram of the tenth part of EP4CE15F17C8N of the present utility model. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0033] The traditional tire pattern recognition solution is implemented through a point-type infrared laser ranging sensor. This solution requires a servo motor to move the point-type infrared laser ranging sensor left and right, resulting in the time for identifying the tire pattern relying on the moving speed of the servo motor. The speed cannot be too fast or too slow. If it is too fast, the recognition data will be inaccurate, and if it is too slow, the recognition time will be too long, thus affecting the recognition efficiency.

[0034] In order to accurately and efficiently identify tire patterns, refer to Figure 1This embodiment provides a circuit for identifying tire patterns, including a programmable logic control unit and a power conversion unit. The power conversion unit converts a 5V power supply to a required voltage value to provide power for the programmable logic control unit. The programmable logic control unit uses a chip model of EP4CE15F17C8N_C51702.

[0035] The circuit for identifying tire patterns also includes an image acquisition unit, which can acquire tire pattern image information at a local position of the tire pattern at a time point, continuously acquire tire pattern image information at multiple local positions of the tire pattern within a time period, and send the tire pattern image information to the programmable logic control unit, thereby realizing efficient acquisition of tire pattern image information.

[0036] The programmable logic control unit processes the received tire pattern image information to obtain tire pattern data. Specifically, the programmable logic control unit processes the tire pattern image information using a triangular parallax ranging algorithm to calculate and obtain the tire pattern data. Using a triangular parallax ranging algorithm to process tire pattern image information is common knowledge in the art and will not be elaborated in detail.

[0037] The circuit for identifying tire patterns also includes a DVP output unit and an HDMI output unit, and the programmable logic control unit sends the processed tire pattern data to a display through the DVP output unit and the HDMI output unit for display.

[0038] Among them, the chip model used by the image acquisition unit is NOIP2SE1300A, which is used to collect tire pattern image information.

[0039] In the present application, the image of the tire pattern is directly captured by the NOIP2SE1300A camera, so that local image information of the tire pattern can be accurately acquired. The acquired image information of the tire pattern is then processed by the programmable logic control unit (EP4CE15F17C8N) to obtain accurate data information of the tire pattern. The data is completely processed by the programmable logic control unit (EP4CE15F17C8N) and does not occupy the time of the NOIP2SE1300A camera to acquire the image.

[0040] Secondly, the NOIP2SE1300A camera can instantly capture images of local tire patterns. In a continuous period of time, the NOIP2SE1300A camera can capture images of tire patterns at multiple local locations at multiple moments, efficiently collecting tire pattern images.

[0041] Reference Figure 2The power conversion unit includes a power chip, a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a second capacitor C2, a third capacitor C3, and a first inductor L1. The power chip is SY8009AAAC.

[0042] The common end of the first capacitor C1, the first resistor R1 and the pin IN of the power chip is connected to a 5V power supply, the other end of the first capacitor C1 is grounded, and the other end of the first resistor R1 is electrically connected to the pin EN of the power chip. The pin GND of the power chip is grounded.

[0043] One end of the first inductor L1 is electrically connected to the pin LX of the power chip. The second resistor R2 and the third resistor R3 are connected in series, the second capacitor C2 and the third capacitor C3 are connected in parallel, and the common end of the third resistor R3, the second capacitor C2 and the third capacitor C3 is grounded.

[0044] A common end of the first inductor L1 , the second resistor R2 , the second capacitor C2 and the third capacitor C3 is a power output end.

[0045] The power conversion unit divides the input 5V power supply to obtain a target power supply that meets the required voltage value. The target power supply is output from the common end of the first inductor L1, the second resistor R2, the second capacitor C2 and the third capacitor C3 to supply power to the programmable logic control unit.

[0046] In response to different voltage value requirements, the resistance value of the second resistor R2 is adjusted to adjust the output voltage value of the target power supply.

[0047] Specifically, the voltage value of the target power supply is adjusted by setting the resistance value of the second resistor R2 as follows:

[0048] Reference Figure 2 When the pin FB of the power chip is connected to a 1.2V power supply and the second resistor R2 is 10 kilo-ohms, the voltage value of the target power supply is 1.2V.

[0049] Reference Figure 3 When the pin FB of the power chip is connected to a 1.8V power supply and the second resistor R2 is 20 kilo-ohms, the voltage value of the target power supply is 1.8V.

[0050] Reference Figure 4 When the pin FB of the power chip is connected to a 2.5V power supply and the second resistor R2 is 31.6 kilo-ohms, the voltage value of the target power supply is 2.5V.

[0051] Reference Figure 5The power conversion unit includes a power chip SY8009AAAC, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a second inductor L2 and a light emitting diode D1.

[0052] The common end of the fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, the fourth resistor R4 and the pin IN of the power chip SY8009AAAC is connected to a 5V power supply, the other common end of the fourth capacitor C4, the fifth capacitor C5 and the sixth capacitor C6 is grounded, and the other end of the fourth resistor R4 is electrically connected to the pin EN of the power chip SY8009AAAC. The pin GND of the power chip SY8009AAAC is grounded.

[0053] One end of the second inductor L2 is electrically connected to the pin LX of the power chip, the fifth resistor R5 and the sixth resistor R6 are connected in series, the seventh resistor R7 is connected in series to the positive electrode of the light-emitting diode D1, and the common end of the negative electrode of the light-emitting diode D1, the seventh capacitor C7, the eighth capacitor C8 and the sixth resistor R6 is grounded. The common end of the fifth resistor R5, the seventh capacitor C7, the eighth capacitor C8 and the seventh resistor R7 is electrically connected to the other end of the second inductor L2.

[0054] The power conversion unit divides the input 5V power supply to obtain a target power supply that meets the required voltage value, and outputs it from the common end of the second inductor L2, the fifth resistor R5, the seventh capacitor C7, the eighth capacitor C8 and the seventh resistor R7 to supply power to the programmable logic control unit.

[0055] Reference Figure 6 The circuit for identifying tire patterns also includes a solidified storage unit, which includes a first storage chip W25Q16JVSSIQ, an eighth resistor R8 and a ninth resistor R9.

[0056] Pin CLK of the first storage chip W25Q16JVSSIQ is electrically connected to pin DCLK of the programmable logic control unit EP4CE15F17C8N through a ninth resistor R9, and pin DO / DI1 of the first storage chip is electrically connected to pin DATA0 of the programmable logic control unit through an eighth resistor R8, for transmitting and storing information of the programmable logic control unit into the first storage chip W25Q16JVSSIQ to prevent loss during power failure.

[0057] The pin CS of the first storage chip W25Q16JVSSIQ is electrically connected to the pin D2 of the programmable logic control unit EP4CE15F17C8N, referring to Fig.11, Pin DO / DI0 of the first storage chip W25Q16JVSSIQ is electrically connected to pin C1 of the programmable logic control unit EP4CE15F17C8N, pin IO2 of the first storage chip W25Q16JVSSIQ is connected to a 3.3V power supply, pin GND is grounded, and pin IO3 and pin VCC are connected to a 3.3V power supply.

[0058] Reference Figure 7 The circuit for identifying the tire pattern further includes a storage unit, and the storage unit includes a second storage chip MT47H32M16NF, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a ninth capacitor C9 and a tenth capacitor C10.

[0059] One end of the eleventh resistor R11 is grounded, the other end of the eleventh resistor R11 is connected in series with the tenth resistor R10, and the common end of the tenth resistor R10 and the eleventh resistor R11 is electrically connected to the pin VREF of the second storage chip MT47H32M16NF.

[0060] One end of the tenth capacitor C10 is grounded, the other end of the tenth capacitor C10 is connected in series with the ninth capacitor C9, and a common end of the tenth capacitor C10 and the ninth capacitor C9 is electrically connected to a pin VREF of the second storage chip MT47H32M16NF.

[0061] A common end of the other end of the tenth resistor R10 and the other end of the ninth capacitor C9 is electrically connected to one end of the twelfth resistor R12, and the other end of the twelfth resistor R12 is connected to a 1.8V power supply.

[0062] The electrical connection between the second memory chip MT47H32M16NF and the programmable logic control unit EP4CE15F17C8N is as follows:

[0063] The pins VDD and VDDQ of the second memory chip MT47H32M16NF are connected to a 1.8V power supply, the pins VSS and VSSQ are grounded, the pin DQ14 is electrically connected to the pin J14 of the programmable logic control unit EP4CE15F17C8N, the pin UDM of the second memory chip MT47H32M16NF is connected to the pin N14 of EP4CE15F17C8N, and the pin UDQS of the second memory chip MT47H32M16NF is electrically connected to the pin K15. For details, refer to Figure 7 and Figures 11 to 20 .

[0064] The second storage chip MT47H32M16NF is electrically connected to the programmable logic control unit EP4CE15F17C8N, and is used for receiving and storing data sent by the programmable logic control unit.

[0065] The image acquisition unit includes an image sensor NOIP2SE1300A, and the programmable logic control unit EP4CE15F17C8N drives the image sensor to acquire tire pattern data.

[0066] In this application, the image sensor NOIP2SE1300A is electrically connected to the programmable logic control unit EP4CE15F17C8N through the connector FPC-05F-32PH20. For specific connection methods, refer to Figure 8 , Pin 1 of the connector FPC-05F-32PH20 is electrically connected to Pin D16 of EP4CE15F17C8N, Pin 2 is electrically connected to Pin D15 of EP4CE15F17C8N, Pin 3 is electrically connected to Pin C16 of EP4CE15F17C8N, and Pin 4 is electrically connected to Pin C15 of EP4CE15F17C8N. For details, please refer to the attached Figure 8 , Attachment Fig.11 To Attachment Fig. 20 .

[0067] Reference Fig. 9 The HDMI output unit includes a first connector, and the first connector adopts HDMI-019S.

[0068] One end of the thirteenth resistor R13 is electrically connected to the eleventh capacitor C11, and the other end of the eleventh capacitor C11 is electrically connected to the pin D2+ of the HDMI-019S connector. One end of the fourteenth resistor R14 is electrically connected to the twelfth capacitor C12, and the other end of the twelfth capacitor C12 is electrically connected to the pin D2- of the HDMI-019S connector.

[0069] One end of the fifteenth resistor R15 is electrically connected to the thirteenth capacitor C13, and the other end of the thirteenth capacitor C13 is electrically connected to the pin D1+ of the HDMI-019S connector. One end of the sixteenth resistor R16 is electrically connected to the fourteenth capacitor C14, and the other end of the fourteenth capacitor C14 is electrically connected to the pin D1- of the HDMI-019S connector. One end of the seventeenth resistor R17 is electrically connected to the fifteenth capacitor C15, and the other end of the fifteenth capacitor C15 is electrically connected to the pin D0+ of the HDMI-019S connector. One end of the eighteenth resistor R18 is electrically connected to the sixteenth capacitor C16, and the other end of the sixteenth capacitor C16 is electrically connected to the pin D0- of the HDMI-019S connector. One end of the nineteenth resistor R19 is electrically connected to the seventeenth capacitor C17, and the other end of the seventeenth capacitor C17 is electrically connected to the pin CK+ of the HDMI-019S connector. One end of the twentieth resistor R20 is electrically connected to the eighteenth capacitor C18, and the other end of the eighteenth capacitor C18 is electrically connected to the pin CK- of the HDMI-019S connector.

[0070] The common end of the thirteenth resistor R13 and the eleventh capacitor C11 is electrically connected to the pin P2 of EP4CE15F17C8N, the common end of the fourteenth resistor R14 and the twelfth capacitor C12 is electrically connected to the pin P1 of EP4CE15F17C8N, the common end of the fifteenth resistor R15 and the thirteenth capacitor C13 is electrically connected to the pin N2 of EP4CE15F17C8N, the common end of the sixteenth resistor R16 and the fourteenth capacitor C14 is electrically connected to the pin N1 of EP4CE15F17C8N, The common end of the seventeenth resistor R17 and the fifteenth capacitor C15 is electrically connected to the pin L2 of EP4CE15F17C8N, the common end of the eighteenth resistor R18 and the sixteenth capacitor C16 is electrically connected to the pin L1 of EP4CE15F17C8N, the common end of the nineteenth resistor R19 and the seventeenth capacitor C17 is electrically connected to the pin J2 of EP4CE15F17C8N, and the common end of the twentieth resistor R20 and the eighteenth capacitor C18 is electrically connected to the pin J1 of EP4CE15F17C8N.

[0071] A common terminal of the thirteenth resistor R13, the fourteenth resistor R14, the fifteenth resistor R15, the sixteenth resistor R16, the seventeenth resistor R17, the eighteenth resistor R18, the nineteenth resistor R19 and the twentieth resistor R20 is connected to a 3.3V power supply.

[0072] The anode of the diode is connected to the 5V power supply, and the cathode of the diode is connected to pin 18 of the HDMI-019S connector. Pins D2_SHIELD, D1_SHIELD, D0_SHIELD, CK_SHIELD, and GND of the HDMI-019S connector are grounded. Pins 20, 21, 22, and 23 of the HDMI-019S connector are grounded.

[0073] The programmable logic control unit processes the image of the tire pattern and obtains data which is sent to the display through the HDMI-019S connector for display, thereby visually presenting the data of the tire pattern.

[0074] Reference Fig.10 The DVP output unit includes a second connector, and the second connector adopts an FPC-05F-20PH20 connector.

[0075] Pin 1 of the FPC-05F-20PH20 connector is electrically connected to pin C8 of EP4CE15F17C8N, pin 2 is electrically connected to pin A7 of EP4CE15F17C8N, pin 3 is electrically connected to pin B7 of EP4CE15F17C8N, pin 4 is electrically connected to pin A6 of EP4CE15F17C8N, pin 5 is electrically connected to pin B6 of EP4CE15F17C8N, and pin 6 is electrically connected to pin A5 of EP4CE15F17C8N. The pin connection relationship between the FPC-05F-20PH20 connector and EP4CE15F17C8N is detailed in the attached Fig.10 and attached Fig.11 To Attachment Fig. 20 .

[0076] The programmable logic control unit (EP4CE15F17C8N) processes the image of the tire pattern and obtains data which is sent to the display through the FPC-05F-20PH20 connector for display.

[0077] The algorithms and control logic in this application are implemented by software programming in combination with circuits, which is the prior art in this field and will not be described in detail here.

[0078] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A circuit for identifying tire treads, comprising a programmable logic control unit and a power conversion unit, wherein the power conversion unit converts a 5V power supply to a required voltage value to supply power to the programmable logic control unit, characterized in that , also includes: The image acquisition unit can acquire tire pattern image information of a local position of the tire pattern at a time point, continuously acquire the tire pattern image information of multiple local positions of the tire pattern within a time period, and send the tire pattern image information to the programmable logic control unit, thereby realizing efficient acquisition of tire pattern image information; The programmable logic control unit processes the received tire pattern image information to obtain tire pattern data; The programmable logic control unit sends the processed tire pattern data to a display through the DVP output unit and the HDMI output unit for display.

2. The circuit for identifying tire tread according to claim 1, characterized in that , the power conversion unit includes a power chip, a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a second capacitor C2, a third capacitor C3 and a first inductor L1; The common end of the first capacitor C1, the first resistor R1 and the pin IN of the power chip is connected to a 5V power supply, the other end of the first capacitor C1 is grounded, and the other end of the first resistor R1 is electrically connected to the pin EN of the power chip; one end of the first inductor L1 is electrically connected to the pin LX of the power chip; the second resistor R2 and the third resistor R3 are connected in series, and the second capacitor C2 and the third capacitor C3 are connected in parallel; the common end of the third resistor R3, the second capacitor C2 and the third capacitor C3 is grounded; the input 5V power supply is divided to obtain a target power supply that meets the required voltage value, and is output from the common end of the first inductor L1, the second resistor R2, the second capacitor C2 and the third capacitor C3.

3. The circuit for identifying tire tread according to claim 2, characterized in that , by adjusting the resistance value of the second resistor R2, so as to adjust the voltage value of the output target power supply; When the second resistor R2 is 10 kilo-ohms, the voltage value of the target power supply is 1.2V; When the second resistor R2 is 20 kilo-ohms, the voltage value of the target power supply is 1.8V; When the second resistor R2 is 31.6 kilo-ohms, the voltage value of the target power supply is 2.5V.

4. The circuit for identifying tire tread according to claim 1, characterized in that , the power conversion unit includes a power chip, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a second inductor L2 and a light-emitting diode D1; The common end of the fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, the fourth resistor R4 and the pin IN of the power chip is connected to a 5V power supply; the other common end of the fourth capacitor C4, the fifth capacitor C5 and the sixth capacitor C6 is grounded; the other end of the fourth resistor R4 is electrically connected to the pin EN of the power chip; The second inductor L2 is electrically connected to the pin LX of the power chip, the fifth resistor R5 and the sixth resistor R6 are connected in series, and the seventh resistor R7 is connected in series to the positive electrode of the light-emitting diode D1; the negative electrode of the light-emitting diode D1, the seventh capacitor C7, the eighth capacitor C8 and the common end of the sixth resistor R6 are grounded; the common end of the fifth resistor R5, the seventh capacitor C7, the eighth capacitor C8 and the seventh resistor R7 is electrically connected to the other end of the second inductor L2; The input 5V power supply is divided to obtain a target power supply that meets the required voltage value, and is output from the common end of the second inductor L2, the fifth resistor R5, the seventh capacitor C7, the eighth capacitor C8 and the seventh resistor R7.

5. The circuit for identifying tire tread according to claim 1, characterized in that , further comprising a solidified storage unit, the solidified storage unit comprising a first storage chip W25Q16JVSSIQ, an eighth resistor R8 and a ninth resistor R9; The pin CLK of the first storage chip is electrically connected to the pin DCLK of the programmable logic control unit through a ninth resistor R9; the pin DO / DI1 of the first storage chip is electrically connected to the pin DATA0 of the programmable logic control unit through an eighth resistor R8, so as to transmit and store information of the programmable logic control unit into the first storage chip to prevent loss due to power failure.

6. The circuit for identifying tire tread according to claim 1, characterized in that , further comprising a storage unit, the storage unit comprising a second storage chip MT47H32M16NF, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a ninth capacitor C9 and a tenth capacitor C10; the second storage chip is electrically connected to the programmable logic control unit, and is used to receive and store data sent by the programmable logic control unit; One end of the eleventh resistor R11 is grounded, the other end of the eleventh resistor R11 is connected in series with the tenth resistor R10, and the common end of the tenth resistor R10 and the eleventh resistor R11 is electrically connected to the pin VREF of the second storage chip MT47H32M16NF; one end of the tenth capacitor C10 is grounded, the other end of the tenth capacitor C10 is connected in series with the ninth capacitor C9, and the common end of the tenth capacitor C10 and the ninth capacitor C9 is electrically connected to the pin VREF of the second storage chip MT47H32M16NF; the common end of the other end of the tenth resistor R10 and the other end of the ninth capacitor C9 is electrically connected to one end of the twelfth resistor R12, and the other end of the twelfth resistor R12 is connected to a 1.8V power supply.

7. The circuit for identifying tire tread according to claim 1, characterized in that The image acquisition unit includes an image sensor, and the programmable logic control unit drives the image sensor to acquire tire pattern image information.

8. The circuit for identifying tire tread according to claim 1, characterized in that The HDMI output unit includes a first connector, and the first connector adopts HDMI-019S; the programmable logic control unit transmits tire pattern data to the display through the first connector.

9. The circuit for identifying tire tread according to claim 1, characterized in that , the DVP output unit includes a second connector, and the second connector adopts FPC-05F-20PH20.

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