Steering prompting circuit and device

Abstract

The utility model discloses a steering prompt circuit and device, and relates to the technical field of automobiles, the steering prompt circuit comprises a steering angle sensor, a signal identification module, a driving module and a prompt module; the signal recognition module is connected with the driving module and the steering angle sensor, the driving module is further connected with the prompting module, and the steering angle sensor is arranged on a whole vehicle steering wheel. The steering angle sensor is used for collecting the current rotating angle of a steering wheel of the whole vehicle and sending a corresponding steering angle signal to the signal identification module; the signal identification module is used for identifying the steering angle signal and sending a corresponding control signal to the driving module; the driving module is used for sending a driving signal to the prompting module when receiving the control signal; and the prompting module is used for prompting the user to pay attention to the rear road condition when receiving the driving signal, so that the safety awareness of the driver in the turning process is enhanced, and the probability of traffic accidents caused by inattention when the driver drives the vehicle to turn is further reduced.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a steering prompt circuit and device. Background Art

[0002] As a means of transportation, cars have become increasingly common in every household. However, as the number of cars increases and roads become increasingly congested, the probability of traffic accidents is also increasing. Some accidents occur when drivers fail to pay attention to the road conditions behind them and arbitrarily slow down and change direction when turning or changing lanes, resulting in collisions with following vehicles. The habit of checking the road conditions behind you before turning or changing lanes requires extensive driving experience. New drivers, with their limited experience and tendency to become nervous behind the wheel, are prone to forgetting to check the road conditions behind them in complex traffic situations. Utility Model Content

[0003] The main purpose of this application is to provide a steering prompt circuit and device, aiming to solve the technical problem of how to enhance the driver's safety awareness when turning.

[0004] To achieve the above-mentioned object, the present application provides a steering prompt circuit, which includes: a steering angle sensor, a signal recognition module, a driving module and a prompt module;

[0005] The signal recognition module is respectively connected to the driving module and the steering angle sensor, the driving module is also connected to the prompt module, and the steering angle sensor is arranged on the steering wheel of the vehicle;

[0006] The steering angle sensor is used to collect the current rotation angle of the vehicle steering wheel and send a corresponding steering angle signal to the signal recognition module;

[0007] The signal recognition module is used to recognize the steering angle signal and send a corresponding control signal to the driving module;

[0008] The driving module is configured to send the driving signal to the prompting module upon receiving the control signal;

[0009] The prompt module is used to prompt the user to pay attention to the road conditions behind when receiving the driving signal.

[0010] In one embodiment, the signal recognition module includes: a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor, and a voltage comparison chip;

[0011] The first positive input terminal and the second positive input terminal of the voltage comparison chip are both connected to the steering angle sensor, the first negative input terminal of the voltage comparison chip is connected to the first end of the first resistor, the first end of the second resistor and the first end of the first capacitor, the second negative input terminal of the voltage comparison chip is connected to the first end of the third resistor, the first end of the fourth resistor and the first end of the second capacitor, the first output terminal of the voltage comparison chip is connected to the first input terminal of the driving module, and the second output terminal of the voltage comparison chip is connected to the second input terminal of the driving module; the second end of the first resistor is connected to the first power supply, the second end of the second resistor and the second end of the first capacitor are grounded; the second end of the third resistor is connected to the second power supply, the second end of the fourth resistor and the second end of the second capacitor are grounded.

[0012] In one embodiment, the control signal includes a first control signal and a second control signal, the driving signal includes a first driving signal and a second driving signal, and the driving module includes: a first driving unit and a second driving unit;

[0013] The input end of the first driving unit is connected to the first output end of the voltage comparison chip, and the output end of the first driving unit is connected to the first input end of the prompt module; the input end of the second driving unit is connected to the second output end of the voltage comparison chip, and the output end of the second driving unit is connected to the second input end of the prompt module;

[0014] The steering angle sensor is configured to send a steering angle signal having a voltage value corresponding to the rotation angle to the signal recognition module;

[0015] The signal recognition module is further configured to send the first control signal to the first drive unit when it is recognized that the voltage value of the steering angle signal is higher than a first voltage, and send the second control signal to the second drive unit when it is recognized that the voltage value of the steering angle signal is lower than a second voltage;

[0016] The first driving unit is configured to send the first driving signal to the prompt module upon receiving the first control signal;

[0017] The second driving unit is configured to send the second driving signal to the prompt module upon receiving the second control signal;

[0018] The prompt module is further configured to prompt the user to observe the road condition behind the left side when the first driving signal is received, and to prompt the user to observe the road condition behind the right side when the second driving signal is received.

[0019] In one embodiment, the first driving unit includes: a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a third capacitor, a first N-type transistor, and a first PMOS transistor;

[0020] The base of the first N-type transistor is connected to the first end of the eighth resistor, the emitter of the first N-type transistor is grounded, the collector of the first N-type transistor is connected to the first end of the seventh resistor, the second end of the eighth resistor is connected to the first output end of the voltage comparison chip, and the second end of the seventh resistor is connected to the gate of the first PMOS transistor; the source of the first PMOS transistor is respectively connected to the first end of the third capacitor, the first end of the fifth resistor and the first end of the sixth resistor, and the drain of the first PMOS transistor is connected to the first input end of the prompt module; the second end of the fifth resistor is connected to the third power supply, and the second end of the sixth resistor and the second end of the third capacitor are grounded.

[0021] In one embodiment, the second driving unit includes: a ninth resistor, a tenth resistor, an eleventh resistor, a fourth capacitor, and a second PMOS transistor;

[0022] The gate of the second PMOS tube is connected to the first end of the eleventh resistor, the source of the second PMOS tube is respectively connected to the first end of the fourth capacitor, the first end of the ninth resistor and the first end of the tenth resistor, and the drain of the second PMOS tube is connected to the second input end of the prompt module; the second end of the eleventh resistor is connected to the second output end of the voltage comparison chip, the second end of the ninth resistor is connected to the fourth power supply, and the second end of the tenth resistor and the second end of the fourth capacitor are grounded.

[0023] In one embodiment, the prompt module includes a voice player.

[0024] In one embodiment, the signal identification module includes: a first ESD transistor, a second ESD transistor, a fifth capacitor, a sixth capacitor, a common mode inductor, and a communication chip;

[0025] The first primary pin of the common-mode inductor is respectively connected to the first end of the first ESD tube, the first end of the fifth capacitor and the first communication end of the steering angle sensor, the second primary pin of the common-mode inductor is connected to the first communication end of the communication chip, the first secondary pin of the common-mode inductor is respectively connected to the first end of the second ESD tube, the first end of the sixth capacitor and the second communication end of the steering angle sensor, and the second secondary pin of the common-mode inductor is connected to the second communication end of the communication chip; the second end of the first ESD tube and the second end of the second ESD tube are grounded; the second end of the fifth capacitor and the second end of the sixth capacitor are grounded; the output end of the communication chip is connected to the input end of the driving module.

[0026] In one embodiment, the driving module includes: a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a seventh capacitor, and a third PMOS transistor;

[0027] The gate of the third PMOS tube is connected to the first end of the twelfth resistor, the drain of the third PMOS tube is connected to the prompt module, and the source of the third PMOS tube is respectively connected to the first end of the thirteenth resistor, the first end of the fourteenth resistor and the first end of the seventh capacitor; the first end of the twelfth resistor is connected to the output end of the communication chip; the second end of the thirteenth resistor is connected to the fifth power supply, and the second end of the fourteenth resistor and the second end of the seventh capacitor are grounded.

[0028] In one embodiment, the prompt module includes at least one of a vibrator and a voice player.

[0029] In addition, to achieve the above-mentioned purpose, the present application also provides a turn signal device, which adopts the turn signal circuit described above.

[0030] The present application provides a steering prompt circuit and device, which includes: a steering angle sensor, a signal recognition module, a drive module and a prompt module; the signal recognition module is respectively connected to the drive module and the steering angle sensor, and the drive module is also connected to the prompt module, and the steering angle sensor is arranged on the steering wheel of the whole vehicle; the steering angle sensor is used to collect the current rotation angle of the steering wheel of the whole vehicle and send a corresponding steering angle signal to the signal recognition module; the signal recognition module is used to identify the steering angle signal and send a corresponding control signal to the drive module; the drive module is used to send the drive signal to the prompt module when receiving the control signal; the prompt module is used to remind the user to pay attention to the road conditions behind when receiving the drive signal. The steering angle sensor obtains the current steering wheel rotation angle of the vehicle and sends a steering angle signal corresponding to the rotation angle to the signal recognition module. The signal recognition module determines whether the vehicle currently has the intention to turn or change lanes based on the rotation angle corresponding to the recognized steering angle signal. If so, the corresponding control signal is sent to the drive module to drive the prompt module to remind the user to pay attention to the road conditions behind, thereby enhancing the driver's safety awareness during the turning process and reducing the probability of traffic accidents caused by the driver's inattention when driving the vehicle to turn. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0033] Figure 1 A schematic diagram of the structure of the first embodiment of the turn prompt circuit of the present application;

[0034] Figure 2 A schematic diagram of the structure of the second embodiment of the turn prompt circuit of this application;

[0035] Figure 3 This is a structural diagram provided for the third embodiment of the turn prompt circuit of this application.

[0036] The purpose, features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0037] It should be understood that the specific embodiments described herein are merely used to explain the technical solutions of the present application and are not intended to limit the present application.

[0038] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0039] This application proposes a first embodiment of the turn prompt circuit, please refer to Figure 1 The steering prompt circuit includes: a steering angle sensor 10, a signal recognition module 20, a driving module 30 and a prompt module 40;

[0040] The signal recognition module 20 is respectively connected to the driving module 30 and the steering angle sensor 10, the driving module 30 is also connected to the prompt module 40, and the steering angle sensor 10 is set on the steering wheel of the vehicle;

[0041] The steering angle sensor 10 is used to collect the current rotation angle of the vehicle steering wheel and send a corresponding steering angle signal to the signal recognition module 20;

[0042] The signal recognition module 20 is used to recognize the steering angle signal and send a corresponding control signal to the driving module 30;

[0043] The driving module 30 is configured to send the driving signal to the prompting module 40 upon receiving the control signal;

[0044] The prompt module 40 is used to prompt the user to pay attention to the road conditions behind when receiving the driving signal.

[0045] It should be noted that, in this embodiment, the steering angle sensor 10 can be installed on the vehicle's steering wheel (not shown in the figure) to collect the current rotation angle of the vehicle's steering wheel. When a steering angle is detected, the steering angle sensor 10 generates a steering angle signal corresponding to the steering angle, and then transmits the steering angle signal to the signal recognition module 20. If the steering angle sensor 10 does not detect that the vehicle's steering wheel has rotated, it will not generate a steering angle signal, and thus will not send the steering angle signal to the signal recognition module 20.

[0046] It is easy to understand that in this embodiment, when the steering angle sensor 10 detects the steering wheel rotation angle of the vehicle, it will send a steering angle signal corresponding to the rotation angle to the signal recognition module 20. When the signal recognition module 20 recognizes the transmitted steering angle signal, it can determine whether the current driver intends to turn or change lanes based on the electrical parameters of the steering angle signal. If so, it will output a corresponding control signal with a small current to the drive module 30. Upon receiving the small current control signal, the drive module 30 outputs a large current drive signal to the prompt module 40, driving the prompt module 40 to generate a clear physical prompt signal, thereby prompting the driver to pay attention to the road conditions behind. Each time the driver turns the vehicle's steering wheel, the prompt module 40 is automatically triggered to operate, prompting the driver to pay attention to the road conditions behind. This not only serves as a warning to the driver, but also cultivates the driver's driving habits, reducing the probability of traffic accidents caused by bad driving habits.

[0047] The physical prompt signal may be a light signal, a sound signal or other relatively obvious physical signals.

[0048] The present application provides a steering prompt circuit, which includes: a steering angle sensor, a signal recognition module, a drive module and a prompt module; the signal recognition module is respectively connected to the drive module and the steering angle sensor, the drive module is also connected to the prompt module, and the steering angle sensor is arranged on the steering wheel of the whole vehicle; the steering angle sensor is used to collect the current rotation angle of the steering wheel of the whole vehicle and send a corresponding steering angle signal to the signal recognition module; the signal recognition module is used to identify the steering angle signal and send a corresponding control signal to the drive module; the drive module is used to send the drive signal to the prompt module when receiving the control signal; the prompt module is used to remind the user to pay attention to the road conditions behind when receiving the drive signal. The steering angle sensor obtains the current steering wheel rotation angle of the vehicle and sends a steering angle signal corresponding to the rotation angle to the signal recognition module. The signal recognition module determines whether the vehicle currently has the intention to turn or change lanes based on the rotation angle corresponding to the recognized steering angle signal. If so, the corresponding control signal is sent to the drive module to drive the prompt module to remind the user to pay attention to the road conditions behind, thereby enhancing the driver's safety awareness during the turning process and reducing the probability of traffic accidents caused by the driver's inattention when driving the vehicle to turn.

[0049] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above embodiment 1 can be referred to the above introduction and will not be described in detail later. Figure 2 , the signal recognition module 20 includes: a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first capacitor C1, a second capacitor C2 and a voltage comparison chip U1;

[0050] The first positive input terminal and the second positive input terminal of the voltage comparison chip U1 are both connected to the steering angle sensor 10, the first negative input terminal of the voltage comparison chip U1 is connected to the first end of the first resistor R1, the first end of the second resistor R2 and the first end of the first capacitor C1, the second negative input terminal of the voltage comparison chip U1 is connected to the first end of the third resistor R3, the first end of the fourth resistor R4 and the first end of the second capacitor C2, the first output terminal of the voltage comparison chip U1 is connected to the first input terminal of the driving module 30, and the second output terminal of the voltage comparison chip U1 is connected to the second input terminal of the driving module 30; the second end of the first resistor R1 is connected to the first power supply VCC1, the second end of the second resistor R2 and the second end of the first capacitor C1 are grounded; the second end of the third resistor R3 is connected to the second power supply VCC2, the second end of the fourth resistor R4 and the second end of the second capacitor C2 are grounded.

[0051] It should be noted that the voltage comparison chip U1 can specifically be an LM393 chip. The LM393 chip is composed of two sets of voltage comparators and can perform two sets of voltage comparisons simultaneously. In this embodiment, it can be understood that there are at least two sets of voltage comparators within the voltage comparison chip U1. The positive input terminals of the two sets of voltage comparators within the voltage comparison chip U1 (the first positive input terminal and the second positive input terminal of the voltage comparison chip U1) are connected together and connected to the steering angle sensor 10. The first negative input terminal corresponding to the first positive input terminal is connected to the first power supply VCC1 via a voltage divider structure formed by a first resistor R1 and a second resistor R2. The second negative input terminal corresponding to the second positive input terminal is connected to the second power supply VCC2 via a voltage divider structure formed by a third resistor R3 and a fourth resistor R4. In this way, the voltage comparison chip U1 can simultaneously compare the voltage value of the received steering angle signal with a first voltage V1 obtained by dividing the first reference voltage output by the first power supply VCC1 through the first resistor R1 and the second resistor R2, and a second voltage V2 obtained by dividing the second reference voltage output by the second power supply VCC2 through the third resistor R3 and the fourth resistor R4. When the voltage value of the steering angle signal is higher than the first voltage V1, a corresponding high-level signal is output to the first input terminal of the driving module 30 through the first output terminal of the voltage comparison chip U1; when the voltage value of the steering angle signal is lower than the first voltage V1, a corresponding low-level signal is output to the first input terminal of the driving module 30 through the first output terminal of the voltage comparison chip U1; when the voltage value of the steering angle signal is higher than the second voltage V2, a corresponding high-level signal is output to the second input terminal of the driving module 30 through the second output terminal of the voltage comparison chip U1; when the voltage value of the steering angle signal is lower than the second voltage V2, a corresponding low-level signal is output to the second input terminal of the driving module 30 through the second output terminal of the voltage comparison chip U1.

[0052] The first capacitor C1 is used to filter the electrical signal received by the first reverse input terminal of the voltage comparator chip U1, and the second capacitor C2 is used to filter the electrical signal received by the second reverse input terminal of the voltage comparator chip U1. The first resistor R1 and the second resistor R2 form a voltage divider structure for dividing the first reference voltage output by the first power supply VCC1 to obtain the first voltage V1 required by the voltage comparator chip U1 and output it to the first reverse input terminal of the voltage comparator chip U1. The first resistor R1 also serves as a current-limiting resistor to limit the current flowing into the first reverse input terminal of the voltage comparator chip U1 to protect the voltage comparator chip U1. Similarly, the third resistor R3 and the fourth resistor R4 form a voltage divider structure for dividing the second reference voltage output by the second power supply VCC2 to obtain the second voltage V1 required by the voltage comparator chip U1 and output it to the second reverse input terminal of the voltage comparator chip U1. The third resistor R3 also serves as a current-limiting resistor to limit the current flowing into the second reverse input terminal of the voltage comparator chip U1 to protect the voltage comparator chip U1.

[0053] It is worth noting that in this embodiment, the first power supply VCC1 and the second power supply VCC2 can be the same power supply or different power supplies. Therefore, the first reference voltage can be equal to or different from the second reference voltage. The corresponding relationship between the first voltage V1 and the second voltage V2 is also the same as the relationship between the first reference voltage and the second reference voltage described above. The specific voltage magnitudes can be determined by the resistance values of the first resistor R1 to the fourth resistor R4 set by the user. Regarding the first power supply and the second power supply, both can be vehicle battery power supplies, which can provide a voltage of 12V or 24V. If both can provide a voltage of 12V (the first reference voltage and the second reference voltage), the first voltage V1 can be 5.5V and the second voltage V2 can be 4.5V, with 1V left in between as a comparison fault tolerance voltage.

[0054] Furthermore, in this embodiment, the control signal includes a first control signal and a second control signal, the driving signal includes a first driving signal and a second driving signal, and the driving module 30 includes: a first driving unit 31 and a second driving unit 32;

[0055] The input end of the first driving unit 31 is connected to the first output end of the voltage comparison chip U1, and the output end of the first driving unit 31 is connected to the first input end of the prompt module 40; the input end of the second driving unit 32 is connected to the second output end of the voltage comparison chip U1, and the output end of the second driving unit 32 is connected to the second input end of the prompt module 40;

[0056] The steering angle sensor 10 is configured to send a steering angle signal having a voltage value corresponding to the rotation angle to the signal recognition module 20;

[0057] The signal recognition module 20 is further configured to send the first control signal to the first drive unit 31 when it is recognized that the voltage value of the steering angle signal is higher than a first voltage, and send the second control signal to the second drive unit 32 when it is recognized that the voltage value of the steering angle signal is lower than a second voltage;

[0058] The first driving unit 31 is configured to send the first driving signal to the prompt module 40 upon receiving the first control signal;

[0059] The second driving unit 32 is configured to send the second driving signal to the prompt module 40 upon receiving the second control signal;

[0060] The prompt module 40 is further configured to prompt the user to observe the road condition behind the left side when the first driving signal is received, and to prompt the user to observe the road condition behind the right side when the second driving signal is received.

[0061] It should be noted that, in this embodiment, the steering angle sensor 10 can collect the steering angle of the vehicle's steering wheel and generate an analog steering angle signal accordingly, such as an electrical signal with a voltage of 1-10V, wherein when the steering angle is 0°, the voltage value of the steering angle signal can be 5V; when the steering angle of the vehicle's steering wheel is a left turn angle, the voltage value of the steering angle signal changes within the range of 1-5V following the size of the steering angle; correspondingly, when the steering angle of the vehicle's steering wheel is a right turn angle, the voltage value of the steering angle signal changes within the range of 5-10V following the size of the steering angle.

[0062] It is easy to understand that in this embodiment, the signal recognition module 20 can identify the voltage value of the analog steering angle signal transmitted by the steering angle sensor 10, and can send a corresponding first control signal to the first drive unit 31 when the voltage value of the steering angle signal is greater than a preset first voltage. When the first drive unit 31 receives the first control signal, it can send a first drive signal to the prompt module 40 to drive the prompt module 40 to prompt the user to observe the road conditions behind the left; in addition, the signal recognition module 20 can also send a corresponding second control signal to the second drive unit 32 when the voltage value of the steering angle signal is less than a preset second voltage. When the second drive unit 32 receives the second control signal, it can send a second drive signal to the prompt module 40 to drive the prompt module 40 to prompt the user to observe the road conditions behind the right.

[0063] Furthermore, in this embodiment, the first driving unit 31 includes: a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a third capacitor C3, a first N-type transistor and a first PMOS transistor Qp1;

[0064] The base B of the first N-type transistor is connected to the first end of the eighth resistor R8, the emitter E of the first N-type transistor is grounded, the collector E of the first N-type transistor is connected to the first end of the seventh resistor R7, the second end of the eighth resistor R8 is connected to the first output end of the voltage comparison chip U1, and the second end of the seventh resistor R7 is connected to the gate G of the first PMOS transistor Qp1; the source S of the first PMOS transistor Qp1 is respectively connected to the first end of the third capacitor C3, the first end of the fifth resistor R5 and the first end of the sixth resistor R6, and the drain D of the first PMOS transistor Qp1 is connected to the first input end of the prompt module 40; the second end of the fifth resistor R5 is connected to the third power supply VCC3, and the second end of the sixth resistor R6 and the second end of the third capacitor C3 are grounded.

[0065] It is easy to understand that in this embodiment, the first control signal can be a high-level signal. When the first N-type transistor Vn1 receives the high-level first control signal through the eighth resistor R8, it enters the on state, and connects the gate G of the first PMOS tube Qp1 to the ground through the seventh resistor R7, so that the third reference voltage output by the third power supply VCC3 can be divided by the voltage divider structure formed by the fifth resistor R5 and the sixth resistor R6 and then flow through the conductive first PMOS tube Qp1 to the prompt module 40. That is, when the first drive unit 31 receives the high-level first control signal, it outputs a high-level first drive signal to the prompt module 40 to drive the prompt module 40 to prompt the user to observe the road conditions behind the left.

[0066] The third capacitor C3 is used to filter out the peak current generated when the first PMOS transistor Qp1 switches between on and off states, thereby ensuring the stability of signal transmission in the circuit. The fifth resistor R5 and the sixth resistor R6 form a voltage divider structure, which is primarily used to divide the third reference voltage output by the third power supply VCC3 to obtain a third voltage, which is transmitted to the prompt module 40 through the first PMOS transistor Qp1. The fifth resistor R5 also acts as a current-limiting resistor, primarily used to limit the current flowing through the first PMOS transistor Qp1 and the prompt module 40, preventing excessive current from damaging the prompt module 40 and the first PMOS transistor Qp1.

[0067] In addition, the seventh resistor R7 also serves as a current-limiting resistor, used to limit the current flowing through the gate G of the first PMOS transistor Qp1 to protect the first PMOS transistor Qp1; the eighth resistor R8 also serves as a current-limiting resistor, used to limit the current flowing through the base B of the first N-type transistor Vn1 to protect the first N-type transistor Vn1.

[0068] Furthermore, in this embodiment, the second driving unit 32 includes: a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a fourth capacitor C4 and a second PMOS transistor Qp2;

[0069] The gate G of the second PMOS transistor Qp2 is connected to the first end of the eleventh resistor R11, the source S of the second PMOS transistor Qp2 is respectively connected to the first end of the fourth capacitor C4, the first end of the ninth resistor R9 and the first end of the tenth resistor R10, and the drain D of the second PMOS transistor Qp2 is connected to the second input end of the prompt module 40; the second end of the eleventh resistor R11 is connected to the second output end of the voltage comparison chip U1, the second end of the ninth resistor R9 is connected to the fourth power supply VCC4, and the second end of the tenth resistor R10 and the second end of the fourth capacitor C4 are grounded.

[0070] It is easy to understand that in this embodiment, the second control signal can be a low-level signal. When the gate G of the second PMOS tube Qp2 receives the low-level second control signal through the eleventh resistor R11, it enters the on state, so that the fourth reference voltage output by the fourth power supply VCC4 can pass through the voltage divider structure formed by the ninth resistor R9 and the tenth resistor R10 and flow through the conductive second PMOS tube Qp2 to the prompt module 40. That is, when the second drive unit 32 receives the low-level second control signal, it outputs a high-level second drive signal to the prompt module 40 to drive the prompt module 40 to prompt the user to observe the road conditions behind the right.

[0071] The fourth capacitor C4 is used to filter out the spike current generated when the second PMOS transistor Qp2 switches between on and off states, thereby ensuring the stability of signal transmission within the circuit. The ninth resistor R9 and the tenth resistor R10 form a voltage divider structure, primarily used to divide the fourth reference voltage output by the fourth power supply VCC4 to obtain a fourth voltage, which is then transmitted to the prompt module 40 via the second PMOS transistor Qp2. The ninth resistor R9 also functions as a current-limiting resistor, primarily used to limit the current flowing through the second PMOS transistor Qp2 and the prompt module 40, preventing damage to the prompt module 40 and the second PMOS transistor Qp2 due to excessive current. The eleventh resistor R11 also functions as a current-limiting resistor, primarily used to limit the current flowing to the gate G of the second PMOS transistor Qp2, preventing damage to the second PMOS transistor Qp2 due to excessive current.

[0072] It is worth noting that, in this embodiment, the third power source VCC3 and the fourth power source VCC4 can also be the same power source or different power sources, which are the same as the first power source VCC1 and the second power source VCC2 described above, and are not described in detail here.

[0073] Furthermore, in this embodiment, the prompt module 40 includes a voice player 41 .

[0074] It is easy to understand that in this embodiment, the prompt module 40 can be a voice player 41. The corresponding voice playback program can be stored in the voice player 41 by inserting a USB flash drive externally or directly storing it internally. When the voice player 41 receives a first driving signal, it plays a voice message similar to "Pay attention to the traffic conditions behind the left" and when it receives a second driving signal, it plays a voice message similar to "Pay attention to the traffic conditions behind the right". This can more clearly remind the user of the things to pay attention to when turning or changing lanes.

[0075] Based on the first embodiment of the present application, in the third embodiment of the present application, the same or similar contents as those in the first embodiment can be referred to the above introduction and will not be described in detail later. Figure 3 The signal recognition module 20 includes: a first ESD transistor ESD1, a second ESD transistor ESD2, a fifth capacitor C5, a sixth capacitor C6, a common mode inductor Lz and a communication chip U2;

[0076] The first primary pin z11 of the common-mode inductor Lz is respectively connected to the first end of the first ESD tube ESD1, the first end of the fifth capacitor C5 and the first communication end of the steering angle sensor 10, the second primary pin z12 of the common-mode inductor Lz is connected to the first communication end of the communication chip U2, the first secondary pin z21 of the common-mode inductor Lz is respectively connected to the first end of the second ESD tube ESD2, the first end of the sixth capacitor C6 and the second communication end of the steering angle sensor 10, the second secondary pin z22 of the common-mode inductor Lz is connected to the second communication end of the communication chip U2; the second end of the first ESD tube ESD1 and the second end of the second ESD tube ESD2 are grounded; the second end of the fifth capacitor C5 and the second end of the sixth capacitor C6 are grounded; the output end of the communication chip U2 is connected to the input end of the driving module 30.

[0077] It should be noted that, in this embodiment, the steering angle sensor 10 may be connected to the signal recognition module 20 via a communication bus, wherein the communication bus may specifically be a CAN communication bus, that is, the steering angle signal may be a differential signal. In a specific implementation, when the steering angle sensor 10 detects that the steering wheel rotation angle of the vehicle exceeds the angle required for the corresponding turning or lane changing operation, the steering angle signal can be output to the communication chip U2 in the signal recognition module 20 through the communication bus. The communication chip U2 can sense whether the steering angle signal is received. When sensing that the steering angle signal is received, the high-level state of its output end can be switched to a low-level state, which can be understood as outputting a low-level control signal to the drive module 30, and the drive prompt module 40 prompts the user to pay attention to the road conditions behind; and when the steering angle sensor 10 does not detect that the steering wheel rotation angle of the vehicle exceeds the angle required for the corresponding turning or lane changing operation, the steering angle signal will not be sent to the communication chip U2. When the communication chip U2 senses that the steering angle signal (CAN signal) is not received, its output end switches from a low-level state back to a high-level state, that is, stops outputting the low-level control signal to the drive module 30, the drive module 30 is turned off, and the prompt module 40 turns off the prompt.

[0078] It is easy to understand that in this embodiment, a first ESD transistor ESD1, a second ESD transistor ESD2, a fifth capacitor C5, a sixth capacitor C6, and a common-mode inductor Lz are provided between the communication chip U2 of the signal recognition module 20 and the steering angle sensor 10. The common-mode inductor Lz can effectively filter out common-mode noise in the differential signal transmitted in the communication bus, i.e., the noise between the two lines and the ground. The first ESD transistor ESD1 and the second ESD transistor ESD2 are respectively provided between the two lines for differential signal transmission and the ground line, for electrostatic protection of the circuit. The fifth capacitor C5 and the sixth capacitor C6 are also respectively provided between the two lines for differential signal transmission and the ground line, for filtering the differential signal transmitted in the circuit. In this way, the stability of the communication channel can be guaranteed. As a preferred solution, the communication chip U2 can be a TJA1043 chip, and the output end of the communication chip U2 can specifically be any one of the RXD pin and the ERR_N pin. When the steering angle signal (CAN signal) is sensed and received, the RXD pin or the ERR_N pin is at a low level; when the steering angle signal (CAN signal) is not sensed and received, the RXD pin or the ERR_N pin is at a high level.

[0079] Furthermore, in this embodiment, the driving module 30 includes: a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a seventh capacitor C7 and a third PMOS transistor Qp3;

[0080] The gate G of the third PMOS transistor Qp3 is connected to the first end of the twelfth resistor R12, the drain D of the third PMOS transistor Qp3 is connected to the prompt module 40, and the source S of the third PMOS transistor Qp3 is respectively connected to the first end of the thirteenth resistor R13, the first end of the fourteenth resistor R14, and the first end of the seventh capacitor C7; the first end of the twelfth resistor R12 is connected to the output end of the communication chip U2; the second end of the thirteenth resistor R13 is connected to the fifth power supply VCC5, and the second end of the fourteenth resistor R14 and the second end of the seventh capacitor C7 are grounded.

[0081] It is easy to understand that in this embodiment, when the communication chip U2 receives the steering angle signal of the differential signal, it can generate a low-level control signal and transmit it to the gate G of the third PMOS transistor Qp3 through the twelfth resistor R12, so that the third PMOS transistor Qp3 is turned on. At this time, the fifth reference voltage output by the fifth power supply VCC5 can be transmitted to the prompt module 40 through the voltage divider structure formed by the thirteenth resistor R13 and the fourteenth resistor R14 through the turned-on third PMOS transistor Qp3. That is, the prompt module 40 receives the high-level drive signal sent by the drive module 30. When receiving the high-level drive signal, the prompt module 40 can prompt the user to observe the road conditions behind.

[0082] When the communication chip U2 does not receive a steering angle signal, it outputs a high-level signal, and the twelfth resistor R12 is used to limit its current. The voltage divider structure formed by the thirteenth resistor R13 and the fourteenth resistor R14 can divide the fifth reference voltage output by the fifth power supply VCC5 to obtain a fifth voltage that meets the power supply requirements of the prompt module 40 and flows to the prompt module 40 through the conductive third PMOS transistor Qp3. The thirteenth resistor R13 also acts as a current-limiting resistor to limit the current flowing through the third PMOS transistor Qp3 and the prompt module 40, preventing excessive current from damaging the third PMOS transistor Qp3 and the prompt module 40. The seventh capacitor C7 is used to filter out the peak current generated when the third PMOS transistor Qp3 switches between on and off states to ensure the stability of signal transmission in the circuit.

[0083] It is worth noting that, in this embodiment, the fifth power source VCC5 may also be the same as the first power source VCC1 to the fourth power source VCC4 described above, and details thereof will not be repeated here.

[0084] Furthermore, in this embodiment, the prompt module 40 includes at least one of a vibrator 42 and a voice player 41 .

[0085] It will be readily understood that in this embodiment, the prompt module 40 may include either a vibrator 42 or a voice player 41, or may include multiple prompting devices having the same or similar functions. Upon receiving a high-level drive signal, the voice player 41 may play a voice message similar to "Pay attention to the traffic behind you," thereby prompting the user to check the traffic behind them. Correspondingly, the vibrator 42 may vibrate, thereby prompting the user to check the traffic behind them.

[0086] An embodiment of the present application further provides a turn signal device, which uses the turn signal circuit described above.

[0087] The steering prompt device provided in the embodiments of the present application, utilizing the steering prompt circuit described above, can address the technical problem of enhancing a driver's safety awareness during turns. Compared to the prior art, the beneficial effects of the steering prompt device provided in the embodiments of the present application are similar to those of the steering prompt circuit provided in the aforementioned embodiments, and are not further elaborated here.

[0088] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent processing scope of the present application.

Claims

1. A turn signal circuit, characterized in that: The steering prompt circuit includes: a steering angle sensor, a signal recognition module, a driving module and a prompt module; The signal recognition module is respectively connected to the driving module and the steering angle sensor, the driving module is also connected to the prompt module, and the steering angle sensor is arranged on the steering wheel of the vehicle; The steering angle sensor is used to collect the current rotation angle of the vehicle steering wheel and send a corresponding steering angle signal to the signal recognition module; The signal recognition module is used to recognize the steering angle signal and send a corresponding control signal to the driving module; The driving module is configured to send a driving signal to the prompting module upon receiving the control signal; The prompt module is used to prompt the user to pay attention to the road conditions behind when receiving the driving signal.

2. The turn prompt circuit according to claim 1, characterized in that: The signal recognition module includes: a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor and a voltage comparison chip; The first positive input terminal and the second positive input terminal of the voltage comparison chip are both connected to the steering angle sensor, the first negative input terminal of the voltage comparison chip is connected to the first end of the first resistor, the first end of the second resistor and the first end of the first capacitor, the second negative input terminal of the voltage comparison chip is connected to the first end of the third resistor, the first end of the fourth resistor and the first end of the second capacitor, the first output terminal of the voltage comparison chip is connected to the first input terminal of the driving module, and the second output terminal of the voltage comparison chip is connected to the second input terminal of the driving module; the second end of the first resistor is connected to the first power supply, the second end of the second resistor and the second end of the first capacitor are grounded; the second end of the third resistor is connected to the second power supply, the second end of the fourth resistor and the second end of the second capacitor are grounded.

3. The turn prompt circuit according to claim 2, characterized in that: The control signal includes a first control signal and a second control signal, the driving signal includes a first driving signal and a second driving signal, and the driving module includes: a first driving unit and a second driving unit; The input end of the first driving unit is connected to the first output end of the voltage comparison chip, and the output end of the first driving unit is connected to the first input end of the prompt module; the input end of the second driving unit is connected to the second output end of the voltage comparison chip, and the output end of the second driving unit is connected to the second input end of the prompt module; The steering angle sensor is configured to send a steering angle signal having a voltage value corresponding to the rotation angle to the signal recognition module; The signal recognition module is further configured to send the first control signal to the first drive unit when it is recognized that the voltage value of the steering angle signal is higher than a first voltage, and send the second control signal to the second drive unit when it is recognized that the voltage value of the steering angle signal is lower than a second voltage; The first driving unit is configured to send the first driving signal to the prompt module upon receiving the first control signal; The second driving unit is configured to send the second driving signal to the prompt module upon receiving the second control signal; The prompt module is further configured to prompt the user to observe the road condition behind the left side when the first driving signal is received, and to prompt the user to observe the road condition behind the right side when the second driving signal is received.

4. The turn prompt circuit according to claim 3, characterized in that: The first driving unit includes: a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a third capacitor, a first N-type transistor and a first PMOS transistor; The base of the first N-type transistor is connected to the first end of the eighth resistor, the emitter of the first N-type transistor is grounded, the collector of the first N-type transistor is connected to the first end of the seventh resistor, the second end of the eighth resistor is connected to the first output end of the voltage comparison chip, and the second end of the seventh resistor is connected to the gate of the first PMOS transistor; the source of the first PMOS transistor is respectively connected to the first end of the third capacitor, the first end of the fifth resistor and the first end of the sixth resistor, and the drain of the first PMOS transistor is connected to the first input end of the prompt module; the second end of the fifth resistor is connected to the third power supply, and the second end of the sixth resistor and the second end of the third capacitor are grounded.

5. The turn prompt circuit according to claim 3, characterized in that: The second driving unit includes: a ninth resistor, a tenth resistor, an eleventh resistor, a fourth capacitor and a second PMOS transistor; The gate of the second PMOS tube is connected to the first end of the eleventh resistor, the source of the second PMOS tube is respectively connected to the first end of the fourth capacitor, the first end of the ninth resistor and the first end of the tenth resistor, and the drain of the second PMOS tube is connected to the second input end of the prompt module; the second end of the eleventh resistor is connected to the second output end of the voltage comparison chip, the second end of the ninth resistor is connected to the fourth power supply, and the second end of the tenth resistor and the second end of the fourth capacitor are grounded.

6. The turn prompt circuit according to claim 3, characterized in that: The prompt module includes a voice player.

7. The turn prompt circuit according to claim 1, characterized in that: The signal recognition module includes: a first ESD tube, a second ESD tube, a fifth capacitor, a sixth capacitor, a common mode inductor and a communication chip; The first primary pin of the common-mode inductor is respectively connected to the first end of the first ESD tube, the first end of the fifth capacitor and the first communication end of the steering angle sensor, the second primary pin of the common-mode inductor is connected to the first communication end of the communication chip, the first secondary pin of the common-mode inductor is respectively connected to the first end of the second ESD tube, the first end of the sixth capacitor and the second communication end of the steering angle sensor, and the second secondary pin of the common-mode inductor is connected to the second communication end of the communication chip; the second end of the first ESD tube and the second end of the second ESD tube are grounded; the second end of the fifth capacitor and the second end of the sixth capacitor are grounded; the output end of the communication chip is connected to the input end of the driving module.

8. The turn prompt circuit according to claim 7, characterized in that: The driving module includes: a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a seventh capacitor and a third PMOS transistor; The gate of the third PMOS tube is connected to the first end of the twelfth resistor, the drain of the third PMOS tube is connected to the prompt module, and the source of the third PMOS tube is respectively connected to the first end of the thirteenth resistor, the first end of the fourteenth resistor and the first end of the seventh capacitor; the first end of the twelfth resistor is connected to the output end of the communication chip; the second end of the thirteenth resistor is connected to the fifth power supply, and the second end of the fourteenth resistor and the second end of the seventh capacitor are grounded.

9. The turn prompt circuit according to claim 7, characterized in that: The prompt module includes at least one of a vibrator and a voice player.

10. A turning prompt device, characterized in that: The turn signal device adopts the turn signal circuit according to any one of claims 1 to 9.

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