CN203876653U - Wheel returning alarm device for parking of vehicle - Google Patents

Abstract

The utility model relates to a wheel returning alarm device for the parking of a vehicle. The device comprises a singlechip unit, a streering wheel corner sensor, a vehicle speed sensor, an audio processing unit, an audio frequency power amplifier unit, and a power supply unit for providing a working voltage for the wheel returning alarm device for the parking of the whole vehicle, wherein signal output terminals of the streering wheel corner sensor and the vehicle speed sensor are respectively connected with an input terminal of the singlechip unit; and an output terminal of the singlechip unit is connected with an input terminal of the audio processing unit, and an output terminal of the audio processing unit is connected with an input terminal of the audio frequency power amplifier unit. According to the device disclosed by the utility model, under the condition that wheels do not return when the vehicle parks, the device actively starts voice broadcast to remind a driver to return the wheels timely, so that the damage to the vehicle is reduced, and the safety of the vehicle is improved.

Description

Car parking wheel back to the reminder device

technical field

The utility model relates to a vehicle-mounted device, in particular to a reminder device for turning the wheels of a car to the right when it is parked. the

Background technique

With the rapid development of my country's automobile industry, automobiles provide people with more convenient and faster life enjoyment. At the same time, more electronic auxiliary equipment makes your driving experience easier and improves your driving safety.

And at present, the situation that steering wheel does not return to normal when car drivers stop is very common, and most of them are some careless car owners who use cars carelessly. In fact, this kind of parking habit is very bad, and frequent parking in this way will cause damage to the vehicle.

On the one hand, if the wheels do not return to the right position when parking, the wheels will drag the steering rod and cannot return. At the same time, the gear of the steering wheel and the rack of the steering rod are also under stress, which will cause accelerated aging or deformation of these parts over time.

On the other hand, in the case of normal parking, the suspension system is in a relatively relaxed state, and the four suspensions are evenly stressed. However, when the steering wheel does not return to normal when parking (that is, the wheels do not return to normal), the wheels of many models will have an inclination angle, and the suspension system will tilt in one direction. Some rubber shock absorbers in the system have a stress that makes them struggle and cannot return normally. Although it will not cause damage in a short period of time, it will cause certain damage to the suspension system after a long time. If the shock-absorbing rubber pad in the suspension system ages, frame weight will appear at the connection of the swing arm or connecting rod of the suspension. The larger the frame weight, the more severe the wear and tear, forming a vicious circle.

In addition, if the steering wheel does not return to normal when parking, it will not only damage the above two parts, but also damage the tires. Under normal circumstances, the tire will keep the tread on the ground and bear the force. When the steering wheel is not back upright, due to the existence of the kingpin inclination and the camber design of the passenger car tire, the tire is not completely on the tread, but Stress is applied to the shoulder and part of the tread. In this case, the pressure on the sidewall of the tire is relatively large. Since the sidewall of the tire is relatively thin, if the tire is often subjected to unbalanced force in this way, the aging deformation of the tire sidewall will be accelerated. After the tire sidewall is aging and deformed, It is likely to cause air leakage or blowout.

There is not a kind of reminding device on the car at present, and the driver will not be reminded actively that the wheels are not back to normal when the car is parked. Parking according to this habit for a long time will bring greater damage and potential safety hazards to the car. the

Contents of the invention

The utility model mainly solves the technical problem that the car will not actively remind the driver that the wheels have not returned to the center when the car is parked, and the long-term non-returning wheel parking will bring greater damage and hidden safety hazards to the car; it provides a car parking car The reincarnation reminder device, when the car is parked and the wheels do not return to the right position, it will actively send out a voice message to remind the driver to return to the right wheel in time, reducing vehicle damage and improving vehicle safety.

The above-mentioned technical problems of the utility model are mainly solved by the following technical solutions: the utility model comprises a single-chip microcomputer unit, a steering wheel angle sensor, a vehicle speed sensor, a voice processing unit and an audio power amplifier unit and provides The power supply unit of the working voltage, the signal output terminals of the steering wheel angle sensor and the vehicle speed sensor are respectively connected with the input terminals of the single-chip microcomputer unit, the output terminal of the single-chip microcomputer unit is connected with the input terminal of the described voice processing unit, and the output of the voice processing unit The terminal is connected with the input terminal of the audio power amplifier unit. When the car is parked, the signal detected by the speed sensor is zero. At this time, the single-chip microcomputer unit processes the signal collected by the steering wheel angle sensor, and judges whether the wheel of the car is back to the center by the signal output by the steering wheel angle sensor. If the wheel is not back to the center, then The single-chip unit outputs control signals to start the voice processing unit to output voice information, and after processing by the audio power amplifier unit, voice broadcasts, such as "please return the wheels", remind the driver to return the wheels as required, thereby reducing damage to the vehicle , also improves vehicle safety.

As a preference, the said device for reminding the wheels of the car parked to turn back includes an indicator lamp reminding circuit, which is connected with the said single-chip microcomputer unit. If the wheel does not return to normal when the car is parked, the single-chip unit outputs a control signal to start the indicator light reminder circuit and light the indicator light. There are both voice reminders and light alarms, and the two-pronged approach improves the reliability of the wheel backing reminder and alarm.

As preferably, the single-chip microcomputer unit includes a unit machine U1, and the single-chip microcomputer U1 adopts a M430F149 single-chip microcomputer; the voice processing unit includes a voice chip U2, and the voice chip U2 adopts a WT588D voice chip; the signal output terminal of the steering wheel angle sensor and the single-chip microcomputer The 35 pins of U1 are connected, and the signal output end of described speed sensor is connected with the 33 pins of single-chip microcomputer U1, and 7 pins, 21 pins, 18 pins, 17 pins and 16 pins of voice chip U2 are connected with 2 pins, 3 pins of single-chip microcomputer U1 respectively. Pins, 4 pins, 5 pins and 6 pins are connected, and 18 pins, 17 pins and 16 pins of the voice chip U2 are respectively connected to D3.3V voltage through resistor R8, resistor R7 and resistor R6. It is convenient to realize and has high reliability.

As a preference, the audio power amplifier unit includes an audio power amplifier U3, and the audio power amplifier U3 adopts a TPA3123D2 audio power amplifier; the 8 pins of the voice chip U2 pass through the resistance R2 and the capacitor C4 and the 5 pins of the audio power amplifier U3. The other is connected to the capacitor C5 and pin 6 of the audio power amplifier U3 through the resistor R3, and the other is grounded through the parallel circuit of the resistor R1 and the capacitor C1, and the parallel connection of the resistor R2 and the capacitor C4 is connected through the parallel connection of the resistor R9 and the capacitor C3 The circuit is grounded, the parallel contact of resistor R3 and capacitor C5 is grounded through the parallel circuit of resistor R4 and capacitor C2, the 19 pins and 20 pins of audio power amplifier U3 are both connected to +12V voltage, and grounded through the parallel circuit of electrolytic capacitor C6 and capacitor C7 , pin 7 of audio power amplifier U3 is grounded through capacitor C8, pin 11 of audio power amplifier U3 is grounded through capacitor C9, pin 8 and pin 9 of audio power amplifier U3 are grounded, pin 2 of audio power amplifier U3 is grounded through resistor R10 and microcontroller The 16 pins of U1 are connected, the 4 pins of the audio power amplifier U3 are connected with the 34 pins of the single chip microcomputer U1 through the resistor R11, one end of the resistor R12 and the resistor R13 are both connected to the voltage VDD, and the other ends of the resistor R12 and the resistor R13 are respectively connected to the audio power amplifier U3 The 17th and 18th feet of the audio power amplifier U3 are connected, the resistance R14 and one end of the resistance R15 are grounded, the other ends of the resistance R14 and the resistance R15 are respectively connected with the 17th and 18th feet of the audio power amplifier U3, and the 1st and 3rd feet of the audio power amplifier U3 , pin 10 and pin 12 are all connected to +12V voltage, pin 13, pin 14, pin 23 and pin 24 of the audio power amplifier U3 are all grounded, and an electrolytic capacitor C16 is connected between pin 1 and pin 13 of the audio power amplifier U3 , the parallel circuit of electrolytic capacitor C17, capacitor C18 and capacitor C19, capacitor C10 is connected between pin 16 and pin 15 of audio power amplifier U3, and pin 15 of audio power amplifier U3 passes through inductance L1, electrolytic capacitor C12 and 1 of speaker U4 The feet are connected, the capacitor C11 is connected between the 22 feet and 21 feet of the audio power amplifier U3, the 22 feet of the audio power amplifier U3 are connected with the 3 feet of the speaker U4 through the inductor L2, the electrolytic capacitor C13, the 2 feet of the speaker U4 are grounded, and the inductor The parallel junction of L1 and electrolytic capacitor C12 is grounded via capacitor C14, and the parallel junction of inductor L2 and electrolytic capacitor C13 is grounded via capacitor C15. The circuit is simple, the implementation is convenient, and the broadcast is clear.

As a preference, the said car parking wheel back-to-center reminding device includes an indicator light reminding circuit, which is connected to the single-chip microcomputer unit; said indicator light reminding circuit includes a resistor R5 and a light-emitting diode D1, and the light-emitting diode D1 The negative pole is connected to pin 3 of the microcontroller U1, the positive pole of the light-emitting diode D1 is connected to one end of the resistor R5, and the other end of the resistor R5 is connected to the D3.3V voltage. The circuit is simple, the installation is convenient, and the light-emitting diode D1 can be embedded on the car dashboard, which is intuitive and clear.

Preferably, the power supply unit is powered by a rechargeable battery, and the rechargeable battery is connected to the car battery. When the car is started, the on-board accumulator will charge the rechargeable battery, and the technical solution can still work after the car is turned off, and can still remind the wheels to return to alignment.

The beneficial effect of the utility model is that: when the wheels are not turned back when the car is parked, the sound and light alarm will be given actively, the warning light will be lighted, and the voice broadcast will be made to remind the driver to turn the wheels back in time, thereby reducing damage to the vehicle. damage and improve vehicle safety.

Description of drawings

Fig. 1 is a block diagram of circuit principle connection structure of the utility model.

Fig. 2 is a kind of circuit schematic diagram of the single-chip microcomputer unit in the utility model.

Fig. 3 is a kind of circuit schematic diagram of the voice processing unit and the indicator light reminding circuit in the utility model.

Fig. 4 is a circuit schematic diagram of the audio power amplifier unit in the utility model.

In the figure 1. SCM unit, 2. Steering wheel angle sensor, 3. Vehicle speed sensor, 4. Voice processing unit, 5. Audio power amplifier unit, 6. Power supply unit, 7. Indicator light reminder circuit, 8. Rechargeable battery, 9. Vehicle storage battery.

Detailed ways

The technical solutions of the present utility model will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

Embodiment: the car parking wheel of the present embodiment returns to the right reminder device, as shown in Figure 1, comprises single-chip microcomputer unit 1, steering wheel angle sensor 2, vehicle speed sensor 3, voice processing unit 4, audio frequency power amplifier unit 5 and indicator light reminder circuit 7 And the power supply unit 6 that provides the working voltage for the entire automobile parking wheel back-to-center reminder device, the signal output terminals of the steering wheel angle sensor 2 and the vehicle speed sensor 3 are respectively connected with the input terminals of the single-chip microcomputer unit 1, and the output terminals of the single-chip microcomputer unit 1 are connected with the voice processing unit respectively. The input end of the unit 4 and the indicator lamp reminding circuit 7 are connected, and the output end of the voice processing unit 4 is connected with the input end of the audio amplifier unit 5 . In this embodiment, the power supply unit 6 is powered by a rechargeable battery 8 , and the rechargeable battery 8 is connected to the vehicle battery 9 .

As shown in Fig. 2, Fig. 3 and Fig. 4, single-chip microcomputer unit 1 comprises unit machine U1 and its peripheral circuit, and single-chip microcomputer U1 adopts M430F149 single-chip microcomputer, and its peripheral circuit can refer to the working manual of this chip; Voice processing unit 4 comprises voice chip U2, Voice chip U2 adopts WT588D voice chip; audio power amplifier unit 5 includes audio power amplifier U3, and audio power amplifier U3 adopts TPA3123D2 audio power amplifier. The signal output terminal of the steering wheel angle sensor 2 is connected to the 35 pin of the single-chip microcomputer U1, the signal output terminal of the vehicle speed sensor 3 is connected to the 33 pin of the single-chip microcomputer U1, and the 7 pins, 21 pins, 18 pins, 17 pins and 16 pins of the voice chip U2 are respectively It is connected with the pins 2, 3, 4, 5 and 6 of the single chip microcomputer U1, and the 18 pins, 17 pins and 16 pins of the voice chip U2 are respectively connected to D3.3V voltage through resistor R8, resistor R7 and resistor R6. The 8-pin of the voice chip U2 is connected with the capacitor C4 and the 5-pin of the audio power amplifier U3 through the resistor R2, the other is connected with the capacitor C5 and the 6-pin of the audio power amplifier U3 through the resistor R3, and the other is connected with the resistor R1 and the capacitor The parallel circuit of C1 is grounded, the parallel connection point of resistor R2 and capacitor C4 is grounded through the parallel circuit of resistor R9 and capacitor C3, the parallel connection point of resistor R3 and capacitor C5 is grounded through the parallel circuit of resistor R4 and capacitor C2, and 19 of the audio power amplifier U3 Pin and pin 20 are both connected to +12V voltage, and grounded through the parallel circuit of electrolytic capacitor C6 and capacitor C7, pin 7 of audio power amplifier U3 is grounded through capacitor C8, pin 11 of audio power amplifier U3 is grounded through capacitor C9, audio power amplifier Both pin 8 and pin 9 of U3 are grounded, pin 2 of audio power amplifier U3 is connected to pin 16 of microcontroller U1 via resistor R10, pin 4 of audio power amplifier U3 is connected to pin 34 of microcontroller U1 via resistor R11, resistor R12, resistor One end of R13 is connected to voltage VDD, the other end of resistor R12 and resistor R13 are respectively connected to pin 17 and pin 18 of the audio power amplifier U3, one end of resistor R14 and resistor R15 is grounded, and the other end of resistor R14 and resistor R15 are respectively connected to The 17-pin and 18-pin of the audio power amplifier U3 are connected, the 1-pin, 3-pin, 10-pin and 12-pin of the audio power amplifier U3 are all connected to +12V voltage, the 13-pin, 14-pin, 23-pin and 24-pin of the audio power amplifier U3 Both are grounded, and a parallel circuit of electrolytic capacitor C16, electrolytic capacitor C17, capacitor C18 and capacitor C19 is connected between pin 1 and pin 13 of the audio power amplifier U3, and a parallel circuit is connected between pin 16 and pin 15 of the audio power amplifier U3. Capacitor C10, pin 15 of audio power amplifier U3 is connected to pin 1 of speaker U4 via inductance L1, electrolytic capacitor C12, capacitor C11 is connected between pin 22 and pin 21 of audio power amplifier U3, pin 22 of audio power amplifier U3 is connected via Inductor L2, electrolytic capacitor C13 are connected to pin 3 of speaker U4, pin 2 of speaker U4 is grounded, the parallel contact of inductor L1 and electrolytic capacitor C12 is grounded via capacitor C14, and the parallel contact of inductor L2 and electrolytic capacitor C13 is grounded via capacitor C15. The indicator light reminder circuit 7 includes a resistor R5 and a light emitting diode D1, the negative pole of the light emitting diode D1 is connected to the pin 3 of the single chip microcomputer U1, the positive pole of the light emitting diode D1 is connected to one end of the resistor R5, and the other end of the resistor R5 is connected to the D3.3V voltage.

Working process: When the car is parked, the signal detected by the speed sensor is zero. At this time, the single-chip microcomputer processes the signal collected by the steering wheel angle sensor. The signal output by the steering wheel angle sensor is used to judge whether the wheel of the car is back. , then the single-chip microcomputer outputs control signals to start the voice processing unit and the indicator light reminder circuit respectively, and the voice processing unit outputs voice information, which is then processed by the audio power amplifier unit to perform voice broadcast, such as "please return the wheel" or "the wheel has not returned to the correct position" etc. After the indicator light reminds the circuit to start, the light-emitting diode is lighted, and the sound and light alarm is carried out at the same time, and the driver is promptly reminded to return to the wheel as required, thereby reducing damage to the vehicle and improving vehicle safety. the

Claims (6)

1. A car parking wheel back to the reminder device, characterized in that it includes a single-chip microcomputer unit (1), steering wheel angle sensor (2), vehicle speed sensor (3), voice processing unit (4) and audio power amplifier unit (5) and for The entire car parking wheel back-alignment reminder device provides the power supply unit (6) of the working voltage, the signal output terminals of the steering wheel angle sensor (2) and the vehicle speed sensor (3) are respectively connected to the input terminals of the single-chip microcomputer unit (1), and the single-chip microcomputer The output end of the unit (1) is connected to the input end of the speech processing unit (4), and the output end of the speech processing unit (4) is connected to the input end of the audio power amplifier unit (5). 2. The vehicle parking wheel turning reminder device according to claim 1, characterized in that it includes an indicator light reminding circuit (7), and the indicator light reminding circuit (7) is connected to the single-chip microcomputer unit (1). 3. The vehicle parking wheel turning reminder device according to claim 1, characterized in that the single-chip microcomputer unit (1) includes a single-chip microcomputer U1, and the single-chip microcomputer U1 adopts an M430F149 single-chip microcomputer; the voice processing unit (4) includes a voice Chip U2, voice chip U2 adopts WT588D voice chip; the signal output terminal of the steering wheel angle sensor (2) is connected to the 35 pin of the single-chip microcomputer U1, and the signal output terminal of the vehicle speed sensor (3) is connected to the 33 pin of the single-chip microcomputer U1 Connected, the 7 pins, 21 pins, 18 pins, 17 pins and 16 pins of the voice chip U2 are respectively connected with the 2 pins, 3 pins, 4 pins, 5 pins and 6 pins of the single chip microcomputer U1, and the 18 pins and 17 pins of the voice chip U2 And 16 pins are respectively connected to D3.3V voltage through resistance R8, resistance R7 and resistance R6. 4. The car parking wheel return reminder device according to claim 3, characterized in that the audio power amplifier unit (5) includes an audio power amplifier U3, and the audio power amplifier U3 adopts a TPA3123D2 audio power amplifier; the voice chip The 8 pins of U2 are connected with the capacitor C4 and the 5 pins of the audio power amplifier U3 through the resistor R2, the other is connected with the capacitor C5 and the 6 pins of the audio power amplifier U3 through the resistor R3, and the other is connected with the resistor R1 and the capacitor C1 The parallel circuit is grounded, the parallel connection point of the resistor R2 and the capacitor C4 is grounded through the parallel circuit of the resistor R9 and the capacitor C3, the parallel connection point of the resistor R3 and the capacitor C5 is grounded through the parallel circuit of the resistor R4 and the capacitor C2, and the 19 pins of the audio power amplifier U3 and The 20 pins are all connected to +12V voltage, and grounded through the parallel circuit of electrolytic capacitor C6 and capacitor C7, the 7 pins of the audio power amplifier U3 are grounded through the capacitor C8, the 11 pins of the audio power amplifier U3 are grounded through the capacitor C9, and the audio power amplifier U3’s Both pin 8 and pin 9 are grounded, pin 2 of the audio power amplifier U3 is connected to pin 16 of the single-chip microcomputer U1 through the resistor R10, pin 4 of the audio power amplifier U3 is connected to pin 34 of the single-chip microcomputer U1 through the resistor R11, and the resistor R12 and the resistor R13 are connected to each other. One end is connected to voltage VDD, the other end of resistor R12 and resistor R13 are respectively connected to pin 17 and pin 18 of the audio power amplifier U3, one end of resistor R14 and resistor R15 is grounded, and the other end of resistor R14 and resistor R15 are respectively connected to audio power Pins 17 and 18 of the amplifier U3 are connected, pins 1, 3, 10 and 12 of the audio power amplifier U3 are connected to +12V voltage, and pins 13, 14, 23 and 24 of the audio power amplifier U3 are grounded , and a parallel circuit of electrolytic capacitor C16, electrolytic capacitor C17, capacitor C18 and capacitor C19 is connected between pin 1 and pin 13 of the audio power amplifier U3, and a capacitor C10 is connected between pin 16 and pin 15 of the audio power amplifier U3 , the 15th pin of the audio power amplifier U3 is connected to the 1st pin of the speaker U4 through the inductor L1, the electrolytic capacitor C12, the capacitor C11 is connected between the 22nd pin and the 21st pin of the audio power amplifier U3, and the 22nd pin of the audio power amplifier U3 is connected through the inductor L2 , The electrolytic capacitor C13 is connected to the 3-pin of the speaker U4, the 2-pin of the speaker U4 is grounded, the parallel contact of the inductor L1 and the electrolytic capacitor C12 is grounded through the capacitor C14, and the parallel contact of the inductor L2 and the electrolytic capacitor C13 is grounded through the capacitor C15. 5. The car parking wheel turning reminder device according to claim 3 or 4, characterized in that it includes an indicator light reminder circuit (7), and the indicator light reminder circuit (7) is connected to the single-chip microcomputer unit (1); The indicator light reminding circuit (7) includes resistor R5 and light emitting diode D1, the negative pole of light emitting diode D1 is connected to pin 3 of single chip microcomputer U1, the positive pole of light emitting diode D1 is connected to one end of resistor R5, and the other end of resistor R5 is connected to D3. 3V voltage. 6. The car parking wheel return reminder device according to claim 1, 2 or 3, characterized in that the power supply unit (6) is powered by a rechargeable battery (8), and the rechargeable battery (8) and the car battery ( 9) Connected.