CN113071382A

CN113071382A - Rearview mirror synchronous tracking and feedback adjusting circuit based on memory adjustment of automobile seat

Info

Publication number: CN113071382A
Application number: CN202110493183.5A
Authority: CN
Inventors: 胡中意; 于向东; 黄伟; 苟华刚; 惠海岗; 辛艺
Original assignee: Chongqing Yanfeng Adient Automotive Components Co Ltd
Current assignee: Chongqing Adient Automotive Components Co Ltd
Priority date: 2021-05-07
Filing date: 2021-05-07
Publication date: 2021-07-06

Abstract

The invention discloses a rearview mirror synchronous tracking and feedback adjusting circuit based on memory adjustment of an automobile seat, which comprises a seat adjusting switch detection unit, a seat motor driving reverse connection prevention unit, a motor working current detection unit, a rearview mirror direction adjusting motor driving unit and a power circuit, wherein the seat adjusting switch detection unit is connected with the seat motor driving unit; the seat motor driving unit and the rearview mirror direction adjusting motor driving unit perform self-adaptive adjustment and driving according to the seat adjusting switch detection unit, and the power circuit outputs power supply after adjustment and awakening. The seat motor drive reverse connection prevention unit and the motor working current detection unit effectively guarantee safe and stable operation of the automobile seat. The intelligent degree is high, and the whole operation is reliable in seat position and the adjustment of rearview mirror angle one key.

Description

Rearview mirror synchronous tracking and feedback adjusting circuit based on memory adjustment of automobile seat

Technical Field

The invention relates to the technical field of automobile seat adjusting circuits, in particular to a rearview mirror synchronous tracking and feedback adjusting circuit based on automobile seat memory adjustment.

Background

With the rapid development of the automobile industry and the electronic technology, the automobile seat focuses on comfort and safety more and more, the extended functions are more and more, and the conventional electric adjusting seat control mode cannot meet the requirements of users.

With the research and design of the seat, aiming at the difference of body types of passengers and drivers, a personalized adjustable seat with pertinence is designed, and the passengers can select a seat with proper sitting posture according to the body types of the passengers to adjust a seat back, a cushion, a headrest and the like.

Based on the design, a seat with multiple postures is designed, and the seat motor arranged on the seat needs to be driven and adjusted based on the seat posture adjustment, so that the control of the seat is realized, namely aiming at the requirement, a circuit capable of realizing the detection of the seat adjustment key and the driving of the seat motor needs to be provided aiming at the new design. And because of the need of adjusting the seat, a plurality of seat motors are designed around the seat for realizing the adjustment of a plurality of postures, but along with the discovery of design and use, when the weight of passengers is different, the range values adopted during the design are designed, when the seat motors are adjusted under different load conditions, the seat motors are unstable in work, and the corresponding circuits are more prone to faults after being used for a plurality of times, such as faults of short circuit, overcurrent and the like, so that the seat motor detection circuits are necessarily designed correspondingly aiming at the characteristics of adjusting the seat, so as to improve the reliability of the intelligent seat. After the seat is adjusted, the angles of the rearview mirrors on the two sides of the vehicle are often required to be adjusted, and after the seat is adjusted, a subsequent series of adjustments are required, so that the operation is complex and the time is wasted.

Disclosure of Invention

In order to solve the problems, the invention provides a rearview mirror synchronous tracking and feedback adjusting circuit based on memory adjustment of an automobile seat.

In order to achieve the purpose, the invention adopts the following specific technical scheme:

the utility model provides a rear-view mirror synchronous tracking and feedback control circuit based on car seat memory is adjusted, its key technology lies in: the device comprises a seat adjusting switch detection unit, a seat motor driving reverse connection prevention unit, a motor working current detection unit, a rearview mirror direction adjusting motor driving unit and a power circuit;

the seat adjusting key signal input end of the seat adjusting switch detection unit is used for acquiring an adjusting key signal, and the switch detection output end of the seat adjusting switch detection unit is used for sending a seat adjusting switch detection signal to the processor;

a seat motor driving signal input end of the seat motor driving unit is used for receiving a seat motor control signal sent by the processor, and all seat motor driving signal output ends of the seat motor driving unit are connected with seat motors of a seat motor group in a one-to-one correspondence manner;

the rearview mirror motor driving signal input end of the rearview mirror direction adjusting motor driving unit is used for receiving a rearview mirror motor control signal sent by the processor, and the rearview mirror motor driving signal output ends of all rearview mirror motor driving units of the rearview mirror direction adjusting motor driving unit are connected with rearview mirror motors of a rearview mirror motor group in a one-to-one correspondence manner;

a relay enabling end of the seat motor driving reverse connection preventing unit is used for acquiring a relay enabling signal sent by the processor;

the seat motor driving reverse connection prevention unit is also provided with a motor current sampling end, the motor current sampling end of the seat motor driving reverse connection prevention unit is connected with the current sampling input end of the motor working current detection unit, the overcurrent output end of the motor working current detection unit outputs an overcurrent detection signal to the processor, and the short circuit output end of the motor working current detection unit is used for outputting a short circuit detection signal to the processor;

the power circuit is used for supplying power to the seat adjusting switch detection unit, the motor working current detection unit and the rearview mirror direction adjusting motor driving unit.

Through the design, set up various buttons or the switch to the gesture regulation on the seat, for example, the seat is slide adjusting around the seat, the back is leaned on the regulation around the seat, seat cushion rear portion altitude mixture control, functional switch or button such as the anterior altitude mixture control of seat cushion, based on above-mentioned button or switch, it is used for detecting the regulation key signal to correspond design seat regulating switch detecting element, and adjust key signal transmission to the treater with corresponding, the treater corresponds the port and sends seat motor control signal to seat motor drive unit's seat motor drive signal input, thereby the seat motor that corresponds in the control seat motor group rotates, the realization is to the seat around realizing, function regulation such as from top to bottom. The seat motor drive reverse connection prevention unit is connected to a relay grounding wire of the seat motor drive unit, and the on-off state of the seat motor drive reverse connection prevention unit is controlled through the processor so as to control whether the grounding wire is grounded. When the seat motor drive reverse connection prevention unit does not work, the seat motor does not malfunction, and therefore reverse connection protection of the seat motor drive unit is achieved. And set up seat motor current sampling end, carry out real-time sampling to seat motor current, guaranteed the normal operating of seat motor. And when the seat is adjusted, the adaptability of the rearview mirror is synchronously adjusted, so that the passengers can avoid adjusting the rearview mirror again, the time is saved, and the intelligent degree is high.

The rearview mirror switch detection and awakening unit is provided with a voltage division unit, a one-way voltage stabilization unit, a key input judgment unit, a control switch unit and an awakening detection unit;

the voltage division unit is provided with a key input end RVM _ SW _ CN, and the key input end RVM _ SW _ CN is used for receiving a key pressing signal;

the voltage division unit is provided with a first voltage division output end which is connected with a detection end of the awakening detection unit, and the awakening detection unit is used for transmitting an awakening signal to the processor through an awakening end RVM _ SW _ WAKEUP _ N;

the switch control terminal RVM _ SW _ CTRL1 of the control switch unit is used for receiving a control switch signal sent by the processor; the control power supply end of the control switch unit is connected with the first voltage division output end of the voltage division unit;

the key input end RVM _ SW _ CN of the voltage dividing unit is connected with the second voltage dividing output end of the key input judging unit through the one-way voltage stabilizing unit; the key input judgment unit is used for sending a key input judgment signal to the processor through the key input judgment end RVM _ SW _ ADC.

Adopt above-mentioned scheme, still be provided with solitary rear-view mirror and awaken up the unit, then the rear-view mirror can carry out the synchronous tracking when adjusting the seat and adjust, can also detect and awaken up the unit through the rear-view mirror switch, carries out solitary control and regulation to the rear-view mirror to improve the regulation precision of rear-view mirror, in order to adapt to different rear-view demands.

In the state of no rearview mirror adjustment, the key signals are all pulled up by 12V in the board, and the circuit part is in the non-working state. The automobile rearview mirror combination switch detection circuit is at least provided with 1 path, when rearview mirror setting adjustment needs to be carried out on a rearview mirror, all key signals are set to be pulled up at 12V in a board, keys are pressed down, at least 1 path of the internal signal of the board is pulled down and is used as a wake-up signal to wake up a processor, the processor controls to turn on a switch, and then whether the key input signal is grounded, pulled up to VS _12V or in an open circuit state is detected through ADC input. As can be seen from fig. 6, the switch input for adjusting the direction of the rearview mirror has three states, i.e., high level, low level, and floating.

According to a further technical scheme, the voltage division unit comprises a resistor R119 and a resistor R120; one end of the resistor R119 is connected with the VS-12V power supply, the other end of the resistor R120 is connected with the common end of the key input end RVM _ SW _ CN, and the key input end RVM _ SW _ CN is connected with the one-way voltage stabilizing unit; the other end of the resistor R120 is used as a first voltage division output end which is respectively connected with the control switch unit and the awakening detection unit;

the awakening detection unit comprises a PNP triode Q29, an emitting electrode of the PNP triode Q29 is connected with a VS _12V power supply, a base electrode of the PNP triode Q29 is connected with one end of a resistor R84, the other end of the resistor R84 serves as a detection end of the awakening detection unit, the detection end is connected with the first voltage division output end and a common end of a power control end, a resistor R85 is connected between the base electrode and the emitting electrode of the PNP triode Q29, and a collecting electrode of the PNP triode Q29 is connected with one end of a resistor R86; the other end of the resistor R86 is grounded through a resistor R87 and a capacitor C136 respectively; the other end of the resistor R86 is used as a wake-up detection end RVM _ SW _ AKEUP _ N;

the control switch unit comprises an NPN triode Q22; a collector of the NPN transistor Q22 is used as a control power supply terminal, the control power supply terminal is connected to the first voltage division output terminal, an emitter of the NPN transistor Q22 is grounded, an emitter and a base of the NPN transistor Q22 are connected to the resistor R122, a base of the NPN transistor Q22 is connected to one end of the resistor R121, and the other end of the resistor R121 is used as the switch control terminal RVM _ SW _ CTRL 1; the unidirectional voltage stabilizing unit comprises a voltage stabilizing diode D19, and the cathode of the voltage stabilizing diode D19 is connected with the voltage dividing unit; the anode of the voltage stabilizing diode D19 is connected with the key input judgment unit

The key input judging unit comprises a resistor R126, a resistor R127 and a resistor R128; one end of the resistor R126 is connected with a 12V power switch output signal VS _12V _ CTL of a power circuit, the other end of the resistor R126 is connected with one end of the resistor R127, a common end of the resistor R126 and the resistor R127 serves as a second voltage division output end, and the second voltage division output end is connected with the unidirectional voltage stabilizing unit; the other end of the resistor R127 is grounded through a resistor R128, and the common end of the resistor R127 and the resistor R128 serves as a key input judgment end RVM _ SW _ ADC.

By adopting the scheme, under the condition that the rearview mirror is not adjusted, the one-way voltage stabilizing unit is not conducted due to the characteristic of the one-way diode, the treatment is not wakened up, the NPN triode Q22 is not opened, and the circuit part is in a non-working state. When the seat of the rearview mirror needs to be adjusted, the relevant keys are pressed, the signal of the case input end is pulled down, the circuit signal is pulled down, the signal is used as a wake-up signal, after the processor is awakened, the processor controls to open an NPN triode Q22, the case signal is input through an ADC (analog to digital converter) to be detected whether to be grounded or not, and the case signal is pulled up to VS-12V or an open circuit state, so that the combined function of the keys is judged. The power consumption is saved, the circuit design is ingenious and simple, the circuit layout of the key unit is effectively utilized for multiple times, the mutual interference is avoided, and the output voltage is stable.

According to a further technical scheme, the seat motor driving reverse connection prevention unit comprises a relay K5 and an NPN triode Q1, wherein the type of the relay is ACP331-CP1 a-12V;

the base electrode of the triode Q1 is connected with one end of a resistor R13, the other end of the resistor R13 is used as the RELAY enabling end of the seat motor drive anti-reverse connection unit, the emitter electrode of the triode Q1 is grounded, a resistor R14 is connected between the emitter electrode and the base electrode of the triode Q1, the collector electrode of the triode Q1 is connected with one end of a coil of the RELAY K5 through a resistor R15, the other end of the coil of the RELAY K5 is connected with the cathode of a diode D1, and the anode of the diode D1 is connected with a power supply VS _12V _ RELAY; one end of a coil of the relay K5 is connected with the anode of a diode D3, and the cathode of the diode D3 is connected with the anode of the diode D1; one switch end of the relay K5 is connected with the R _ GND ground, and the other switch end of the relay K5 is connected with the M _ GND ground through a resistor R1.

By adopting the scheme, after the base electrode of the triode Q1 receives the high-level signal received by the relay enabling end, the triode Q1 is conducted, the contact of the relay K5 is sucked, the seat motor driving unit realizes grounding of the grounding wire, the seat motor driving unit starts to work, and when the positive electrode and the negative electrode of the power supply are reversely connected, the relay K5 does not work. Thereby the reverse connection protection of the seat motor driving circuit is realized.

According to a further technical scheme, the seat motor group comprises a seat front-back sliding seat motor, a seat back front-back leaning seat motor, a seat cushion rear height adjusting seat motor and a seat cushion front height adjusting seat motor; eight paths of seat adjusting switch detection circuits are arranged in the seat adjusting switch detection unit, each seat motor corresponds to two paths of seat adjusting switch detection circuits, and the eight paths of seat adjusting switch detection circuits are consistent in structure; the seat motor driving unit comprises four paths of seat motor driving circuits, namely a seat front-back sliding seat motor driving circuit, a seat back front-back leaning seat motor driving circuit, a seat cushion rear height adjusting seat motor driving circuit and a seat cushion front height adjusting seat motor driving circuit;

each seat motor can rotate in a forward and reverse mode, each seat motor needs to correspond to two driving signals, and eight seat adjusting switch detection circuits are correspondingly arranged in the four seat motors and used for obtaining a key switch request of a passenger.

The seat adjusting switch detection circuit comprises a triode Q17, the base electrode of the triode Q17 is connected with one end of an inductor L9 after passing through a resistor R104, the other end of the inductor L9 is grounded through a capacitor C69, and the other end of the inductor L9 is used as the seat adjusting key signal input end of the seat adjusting switch detection unit; the common end of the inductor L9 and the resistor R104 is connected with a 5V power supply through a resistor R100 and a resistor R99, the emitter of the triode Q17 is connected with the common end of the resistor R100 and the resistor R99, the emitter of the triode Q17 is used as the switch detection output end of the seat adjustment switch detection circuit, the emitter of the triode Q17 is grounded through a capacitor C73, and the collector of the triode Q17 is grounded;

after the chair adjusting key signal input end acquires a low level signal, the triode Q17 is conducted, and the switch detection output end outputs a high level to the processor.

Any seat motor driving circuit comprises two seat motor driving signal input ends and two seat motor driving signal output ends, and the two seat motor driving signal input ends and the two seat motor driving signal output ends are in one-to-one correspondence; a transistor high-level driving circuit and a relay closing driving circuit are sequentially arranged between the seat motor driving signal input end and the seat motor driving signal output end; and the ground end of a relay coil in the relay closing drive circuit is isolated by a relay K5 in the seat motor drive reverse connection prevention unit.

The multiple transistor high-level driving circuits are designed by adopting integrated driving chips, the integration level is high, the arrangement is convenient, and the space is saved. The transistor is of NPN type, and belongs to the prior art. For the relay closing drive circuit, high level signal output can be generated by electrifying the relay coil to control the contact to be closed and the like. And the on-off of the grounding wire is controlled by adopting the seat motor to drive the reverse connection prevention unit, so that the reverse connection prevention is realized.

According to a further technical scheme, the sensor comprises a Hall sensor group unit; the Hall signal output end of the Hall sensor group unit is connected with the Hall signal input end of the Hall sensor detection unit, and the Hall detection enabling end of the Hall sensor detection unit is used for acquiring a Hall detection enabling signal sent by the processor; a Hall detection signal end of the Hall sensor detection unit feeds a Hall detection signal back to the processor; the Hall power supply acquisition device comprises a Hall sensor group unit, a Hall power supply end and a Hall power supply acquisition end, wherein the Hall power supply end of the Hall sensor group unit is also connected with the Hall sensor power supply unit, the Hall power supply enable end of the Hall sensor power supply unit is used for acquiring a Hall power supply enable signal sent by the processor, the Hall power supply acquisition end of the Hall sensor power supply unit is used for feeding back the Hall power supply acquisition signal to the processor, and the Hall power supply end of the Hall sensor power supply unit is connected with the Hall power supply end of the Hall sensor group unit.

By adopting the scheme, the position and the rotating angle of each seat motor in the seat can be acquired, so that the whole circuit can realize signal control and feedback closed loop.

According to a further technical scheme, the Hall sensor detection unit comprises four detection branches, namely a seat front-back sliding seat motor Hall detection branch, a seat back front-back leaning seat motor Hall detection branch, a seat cushion rear height adjusting seat motor Hall detection branch and a seat cushion front height adjusting seat motor Hall detection branch;

a seat front-rear sliding seat motor Hall signal input end of the seat front-rear sliding seat motor Hall detection branch circuit is connected with one end of a resistor R37 through a resistor R26, the other end of the resistor R37 is grounded through a capacitor C10, and the other end of the resistor R37 is used as a seat front-rear sliding seat motor Hall detection signal end of the seat front-rear sliding seat motor Hall detection branch circuit; the common end of the resistor R26 and the resistor R37 is connected with the collector of an NPN triode Q4 after passing through a resistor R33, the base of the triode Q4 is connected with one end of a resistor R27, the other end of the resistor R27 is used as the Hall detection enabling end of the Hall sensor detection unit, the emitter of the triode Q4 is grounded, and a resistor R32 is connected between the emitter and the base of the triode Q4;

the seat back front and back leaning seat motor Hall signal input end of the seat back front and back leaning seat motor Hall detection branch circuit is connected with one end of a resistor R38 through a resistor R29, the other end of the resistor R38 is grounded through a capacitor C11, and the other end of the resistor R38 is used as the seat back front and back leaning seat motor Hall detection signal end of the seat back front and back leaning seat motor Hall detection branch circuit; the common end of the resistor R29 and the resistor R38 is connected with the collector of the triode Q4 after passing through the resistor R34;

the Hall signal input end of a seat cushion rear height adjusting seat motor of the seat cushion rear height adjusting seat motor Hall detection branch circuit is connected with one end of a resistor R39 through a resistor R30, the other end of the resistor R39 is grounded through a capacitor C12, and the other end of the resistor R39 is used as a seat cushion rear height adjusting seat motor Hall detection signal end of the seat cushion rear height adjusting seat motor Hall detection branch circuit; the common end of the resistor R30 and the resistor R39 is connected with the collector of the triode Q4 after passing through the resistor R35;

the Hall signal input end of the seat cushion front height adjusting seat motor Hall detection branch circuit is connected with one end of a resistor R40 through a resistor R31, the other end of the resistor R40 is grounded through a capacitor C13, and the other end of the resistor R40 is used as the Hall signal end of the seat cushion front height adjusting seat motor Hall detection branch circuit; the common end of the resistor R31 and the resistor R40 is connected with the collector of the triode Q4 after passing through the resistor R36;

the hall sensor power supply unit comprises an NPN triode Q6, the base of the triode Q6 is connected with one end of a resistor R43, the other end of the resistor R43 is used as a hall power supply enabling end of the hall sensor power supply unit, the emitter of the triode Q6 is grounded, a resistor R44 is connected between the emitter and the base of the triode Q6, the collector of the triode Q6 is connected with the collector of a PNP triode Q5 through a resistor R46, the emitter of the triode Q5 is connected with a VS _12V power supply, the base of the triode Q5 is connected with a VS _12V power supply through a resistor R42 and a resistor R41, the collector of the triode Q5 is connected with the common end of the resistor R46 through a resistor R45 and the common end of the resistor R42 and the resistor R41, the two ends of the resistor R45 are connected with a capacitor C14 in parallel, the common end of the collector and the resistor R5 of the triode Q5 is further connected with the gate of a P-channel MOS 5, and the source of the MOS 5, The common end of the resistor R41 is connected, the drain electrode of the MOS tube Q7 is connected with the anode of the diode D11 through the inductor L5, the cathode of the diode D11 is used as the Hall power supply end of the Hall sensor power supply unit, the drain electrode of the MOS tube Q7 is connected with the common end of the inductor L5 through the resistor R47 and the resistor R48 which are grounded, the common ends of the resistor R47 and the resistor R48 are connected with one end of the resistor R49, and the other end of the resistor R49 is used as the Hall power supply acquisition end of the Hall sensor power supply unit.

The seat motor Hall detection branch is correspondingly designed aiming at the design of the seat motor, and data acquisition and processing are realized. The Hall sensor power supply unit realizes power supply control of the Hall sensor detection circuit, and the invention realizes double closed-loop control by combining a seat motor drive closed loop and a Hall sensor closed loop.

According to a further technical scheme, the seat motor working current detection unit comprises a seat motor overcurrent detection branch and a seat motor short circuit detection branch;

the seat motor over-current detection branch comprises an over-current sampling filter module, an over-current sampling input end of the over-current sampling filter module is used for acquiring seat motor sampling differential voltage, an over-current sampling output end of the over-current sampling filter module is connected with an over-current signal input end of a seat motor over-current signal linear amplification module, and an over-current output end of the seat motor over-current signal linear amplification module is used for outputting an over-current detection signal to a processor;

the seat motor short circuit detection branch circuit comprises a short circuit sampling filtering module, the short circuit sampling input end of the short circuit sampling filtering module is used for acquiring seat motor sampling voltage, the short circuit sampling output end of the short circuit sampling filtering module is connected with the short circuit signal input end of the seat motor short circuit signal linear amplification module, and the short circuit output end of the seat motor short circuit signal linear amplification module is used for outputting a short circuit detection signal to the processor;

the power supply input end of the power supply circuit is used for acquiring a 12V power supply, and the power supply enabling end of the power supply circuit is used for acquiring a power supply enabling signal VCC5V _2_ EN sent by the processor; and the 5V power output end of the power circuit is used for supplying power to the seat motor overcurrent signal linear amplification module and the seat motor short circuit signal linear amplification module.

The seat motor overcurrent detection branch circuit and the seat motor short circuit detection branch circuit are designed, the seat motor overcurrent detection branch circuit acquires differential voltage on a reverse connection prevention circuit driven by a seat motor, and overcurrent detection signals obtained after the seat motor overcurrent detection branch circuit is processed and amplified are transmitted to a processor. The seat motor short circuit detection branch circuit obtains a voltage signal in the seat motor reverse connection prevention circuit, and the voltage amplified through the fixed line is used for feeding back to the processor, so that the function of detecting short circuit current is achieved. After the processor receives the current signal, the working state of the seat motor can be acquired by comparing the signal size with the preset circuit threshold value size, so that the working state of a driver or a passenger seat is prompted, and when a short circuit or overcurrent occurs, the working reliability of the seat motor is improved quickly or through fault information. In the working process of the seat motor, the processor sends a power supply enabling signal VCC5V _2_ EN to control the power supply circuit to start working, so that the power supply circuit supplies power to the two current detection branches, and the power supply does not supply power when the seat motor does not work, so that the electric energy can be saved through the design.

Still further, the system also comprises a rearview mirror motor position sensor detection unit, a rearview mirror motor position sensor power circuit and a rearview mirror motor position sensor group; the rearview motor position sensors in the rearview motor position sensor group are installed in one-to-one correspondence with the rearview motors, a rearview position detection input end of the rearview motor position sensor detection unit is used for acquiring rearview sensing signals of the rearview motor position sensors, and a rearview position detection output end of the rearview motor position sensor detection unit is used for feeding back rearview position signals to the processor; the sensor power supply end of the power circuit of the rearview mirror motor position sensor is used for supplying power to the rearview mirror motor position sensor, the sensor power supply enabling end of the power circuit of the rearview mirror motor position sensor is connected with the processor, and the sensor power supply feedback end of the power circuit of the rearview mirror motor position sensor is connected with the processor;

the rearview mirror motor set comprises four rearview mirror motors which are respectively as follows: a left side left and right deflection rearview mirror motor, a left side up and down deflection rearview mirror motor, a right side left and right deflection rearview mirror motor and a right side up and down deflection rearview mirror motor;

the rearview mirror direction adjusting motor driving unit comprises a rearview mirror motor driving chip IC4, and the model of the rearview mirror motor driving chip IC4 is L99MD02 XP; a seventh pin of the rearview mirror motor driving chip IC4 is connected with one end of a resistor R55, the other end of the resistor R55 serves as a driving signal input end of a rearview mirror motor at the left side of the rearview mirror direction adjusting motor driving unit, and the seventh pin of the rearview mirror motor driving chip IC4 is grounded through a resistor R58 and a capacitor C17; an eighth pin of the rearview mirror motor driving chip IC4 is connected with one end of a resistor R56, and the other end of the resistor R56 is used as a driving signal input end of a rearview mirror motor at the right side of the rearview mirror direction adjusting motor driving unit; an eighth pin of the rearview mirror motor driving chip IC4 is grounded through a resistor R57 and a capacitor C16 respectively; the second pin, the third pin, the sixteenth pin and the seventeenth pin of the rearview mirror motor driving chip IC4 are correspondingly connected with the four rearview mirror motors one by one; the thirtieth pin, the second eighth pin, the second sixth pin and the second fourth pin of the rearview mirror motor driving chip IC4 are respectively connected with the four rearview mirror driving feedback ends of the processor in a one-to-one correspondence manner;

the rearview mirror motor position sensor detection unit comprises four paths of rearview mirror motor position sensor detection circuits, the four paths of rearview mirror motor position sensor detection circuits are consistent in structure and comprise detection resistors Rjc, two ends of each detection resistor Rjc are grounded through a capacitor, one end of each detection resistor Rjc serves as a rearview mirror position detection input end, and the other end of each detection resistor Rjc serves as a rearview mirror position detection output end;

the power circuit of the rearview mirror motor position sensor comprises a PNP triode Q10, an emitter of a triode Q10 is connected with a base of a triode Q10 through a capacitor C31 and a resistor R68 respectively, an emitter of a triode Q10 is connected with a base of a PNP triode Q8 through a resistor R65, an emitter of the triode Q10 is further connected with an output end of VCC5V of the power circuit through a resistor R64, an emitter of the triode Q8 is connected with an output end of VCC5V of the power circuit, a collector of the triode Q8 is connected with a base of the triode Q10, a base of the triode Q10 is further connected with a collector of the triode Q9 through a resistor R69, a base of the triode Q9 is connected with one end of a resistor R66, and the other end of the resistor R66 is used as a sensor power supply enabling end SEM _ Poweer _ RVEN of the power circuit of the rearview mirror motor position sensor;

the emitter of the triode Q9 is grounded, and a resistor R67 is connected between the emitter and the base of the triode Q9; the collector of the triode Q10 is grounded through a capacitor C32, the collector of the triode Q10 is grounded through a resistor R70 and a resistor R71, the common ends of the resistor R70 and the resistor R71 are connected with one end of the resistor R72, and the other end of the resistor R72 is used as a sensor power supply feedback end I _ A _ RVMSEN _ ADC of the power circuit of the rearview mirror motor position sensor; the collector of the triode Q10 is also connected with the anode of a voltage stabilizing diode D15 through an inductor L4, and the cathode of the voltage stabilizing diode D15 is used as the power supply end of the power supply circuit sensor of the rearview mirror motor position sensor.

By adopting the scheme, the rearview mirror motor position sensor group

The position of the rearview mirror motor is collected and fed back in real time, and accurate adjustment is achieved. The detection unit of the rearview mirror motor position sensor feeds back the detected signal to the processor in real time; the power supply circuit of the rearview mirror motor position sensor is controlled by the processor and outputs a power supply signal to be controlled in real time, after a sensor power supply enabling end RVM _ Sen _ Poweer _ EN of the power supply circuit of the rearview mirror motor position sensor acquires a control signal, the triode Q9 is conducted to conduct the triode Q10, and the power supply end 5V _ RNM _ SEN of the power supply circuit of the rearview mirror motor position sensor outputs the power supply signal. The PNP transistor Q8 plays a role in current limiting/short circuit protection, and when the current flowing through the resistor R64 is excessive, the transistor Q8 is turned on due to the increased voltage drop of the resistor R64, and the transistor Q10 is turned off, so that the power supply of the sensor is stopped. The voltage divided by the resistor R70 and the resistor R72 is fed back to the processor for measuring the power supply voltage of the sensor.

According to a further technical scheme, the power supply circuit comprises a 12V power supply switch unit, and a power supply current limiting, decoupling and bypass unit, a low-voltage difference voltage stabilizing unit, a power supply decoupling unit and a 5V power supply switch unit which are sequentially connected;

the 12V switch input end of the 12V power switch unit is used for receiving a 12V power switch driving signal sent by the processor, and the power end of the 12V power switch unit is connected with a VS-12V power supply; a 12V switch output end of the 12V power switch unit outputs a 12V power switch output signal VS _12V _ CTL; the 12V switch output end of the 12V power switch unit supplies power to the seat adjusting switch detection unit and the rearview mirror switch detection and awakening unit;

the power supply current-limiting decoupling and bypass unit comprises a current-limiting resistor R62, one end of a current-limiting resistor R62 is used as a power supply input end of the power supply circuit, the other end of the current-limiting resistor R62 is grounded through a polar capacitor C27, and the other end of the resistor R62 is grounded through a capacitor C28 and a capacitor C29 which are connected in series in sequence;

the low dropout voltage regulator unit comprises a low dropout voltage regulator IC5, and the model is as follows: the BD450M2FP3-CE2, the input end of the low dropout regulator IC5 is connected with the other end of the current-limiting resistor R62, and the output end of the low dropout regulator IC5 is connected with the power supply decoupling unit;

the power supply decoupling unit comprises a capacitor C30 and a resistor R63, one end of the capacitor C30 is connected with one end of the resistor R63, the other end of the capacitor C30 is grounded, the common end of the capacitor C30 and the resistor R63 is connected with the output end of the low-dropout regulator IC5, the other end of the resistor R63 is connected with the 5V power supply switch unit, and the other end of the resistor R63 and the common end of the 5V power supply switch unit are also used as a first 5V power supply output end of the power supply circuit; the first 5V power output end of the power supply circuit is used for supplying power to the power supply circuit of the rearview mirror motor position sensor;

the 5V power switch unit comprises a P-channel enhancement type MOS field effect transistor Q13, a source S of the P-channel enhancement type MOS field effect transistor Q13 is connected with the other end of the resistor R63, the source S of the field effect transistor Q13 is connected with a grid G of the field effect transistor Q13 through a resistor R92 and a capacitor C63 which are connected in parallel, the grid G of the field effect transistor Q13 is used as a power supply enabling end of the power circuit, and a drain electrode of the field effect transistor Q13 is used as a second 5V power output end VCC5V _2 of the power circuit;

and a second 5V power output end VCC5V _2 of the power supply circuit is used for supplying power to the rearview mirror direction adjusting motor driving unit and the motor working current detection unit.

Adopt above-mentioned scheme, the power is handled through the step-down steady voltage, obtain 5V or 12V's power output, to the power supply circuit part of second 5V power output VCC5V _2 and first 5V power output, the centre adopts the switch element to carry out ability control to the output, can only be when seat motor during operation promptly, the power that corresponds current detection circuit corresponds just exports corresponding power supply, other moments are out of work, the power supply is controllable, when not waking up the state, stop supplying power, it is controllable to realize the power supply.

The invention has the beneficial effects that: through above-mentioned circuit design, when realizing seat key switch signal acquisition, combine to gather the seat motor that the signal pair corresponds and drive, realize one-to-one control, the position signal that seat regulating switch selected can be followed to the rear-view mirror simultaneously, and the follow of self-adaptation is adjusted. In the circuit, an anti-reverse connection design is designed for the driving of the seat motor, so that the reliability of the seat motor driving circuit is improved. In order to realize accurate control of the seat motor by carrying out feedback acquisition, a Hall sensor detection circuit and the like are designed to realize the acquisition of the position and the rotation angle of the seat motor, and the design of a closed-loop control circuit of the seat motor is realized. The control is more accurate, and the detection is more reliable. And the seat motor over-current detection branch and the seat motor short circuit detection branch are also designed, the seat motor over-current detection branch acquires differential voltage on a seat motor drive anti-reverse connection circuit, and an over-current detection signal obtained after the seat motor over-current detection branch is processed and amplified is transmitted to the processor. The seat motor short circuit detection branch circuit obtains a voltage signal in the seat motor reverse connection prevention circuit, and the voltage amplified through the fixed line is used for feeding back to the processor, so that the function of detecting short circuit current is achieved. After the processor receives the current signal, the working state of the seat motor can be acquired by comparing the signal size with the preset circuit threshold value size, so that the working state of a driver or a passenger seat is prompted, and when a short circuit or overcurrent occurs, the working reliability of the seat motor is improved quickly or through fault information. And power supply circuit carries out real-time adaptability power supply according to seat motor operating condition, and is intelligent high, practices thrift the electric energy. Meanwhile, the adjusting circuit of the seat is powered by a wake-up power supply, and when the adjusting circuit is not required to be adjusted, part of the power supply circuit does not work, so that electric energy is saved.

Drawings

FIG. 1 is a circuit block diagram of the seat adjustment circuit of the present invention;

FIG. 2 is a circuit diagram corresponding to the seat adjustment switch detection unit of FIG. 1;

FIG. 3 is a corresponding circuit diagram of the seat motor drive unit of FIG. 1;

FIG. 4 is a circuit diagram corresponding to the seat motor drive anti-reverse unit of FIG. 1;

FIG. 5 is a circuit diagram corresponding to the Hall sensor detecting unit in FIG. 1;

FIG. 6 is a circuit diagram corresponding to the Hall sensor power supply unit in FIG. 1;

FIG. 7 is a block diagram of a seat motor operating current detecting unit shown in FIG. 1;

fig. 8 is a circuit diagram of a seat motor operating current detecting unit in fig. 1;

FIG. 9 is a circuit diagram of a drive unit of the mirror direction adjusting motor of FIG. 1;

FIG. 10 is a block diagram of the internal connections of the mirror switch detection and wake-up unit of FIG. 1;

FIG. 11 is a circuit diagram of the rearview mirror switch detection and wake-up unit of FIG. 1;

FIG. 12 is a circuit diagram of a detection unit of the mirror motor position sensor of FIG. 1;

FIG. 13 is a circuit diagram of a power supply circuit for the mirror motor position sensor of FIG. 1;

FIG. 14 is a power supply block diagram of the power supply circuit;

fig. 15 is a power supply circuit internal block diagram.

Fig. 16 is a power supply circuit diagram.

Detailed Description

The following provides a more detailed description of the embodiments and the operation of the present invention with reference to the accompanying drawings.

A rearview mirror synchronous tracking and feedback adjusting circuit based on automobile seat memory adjustment can be seen from figure 1 and comprises a seat adjusting switch detection unit 1, a seat motor driving unit 2, a seat motor driving reverse connection prevention unit 3, a motor working current detection unit 7, a rearview mirror direction adjusting motor driving unit 9 and a power circuit C;

in this embodiment, as can also be seen in fig. 1, a seat adjustment key signal input end of the seat adjustment switch detection unit 1 is configured to obtain an adjustment key signal, and a switch detection output end of the seat adjustment switch detection unit 1 is configured to send the seat adjustment switch detection signal to the processor K;

in this embodiment, as can also be seen in fig. 1, a seat motor driving signal input end of the seat motor driving unit 2 is configured to receive a seat motor control signal sent by the processor K, and all seat motor driving signal output ends of the seat motor driving unit 2 are connected to seat motors of a seat motor group in a one-to-one correspondence manner;

in this embodiment, as can also be seen from fig. 1, a driving signal input end of a mirror motor of the mirror direction adjusting motor driving unit 9 is configured to receive a mirror motor control signal sent by the processor K, and output ends of all mirror motor driving signals of the mirror direction adjusting motor driving unit 9 are connected to mirror motors of a mirror motor group in a one-to-one correspondence manner;

in this embodiment, as can also be seen from fig. 1, a seat motor driving reverse connection prevention unit 3 is connected to a relay ground wire of the seat motor driving unit 2, and a relay enable end of the seat motor driving reverse connection prevention unit 3 is used for acquiring a relay enable signal sent by the processor K;

in this embodiment, as can also be seen in combination with fig. 1, the seat motor driving reverse connection prevention unit 3 is further provided with a seat motor current sampling end, a seat motor current sampling end I _ sen _ p of the seat motor driving reverse connection prevention unit 3 is connected with a current sampling input end of the seat motor working current detection unit 7, an overcurrent output end I _ SEATsen _ MCU _ ADC of the seat motor working current detection unit 7 outputs an overcurrent detection signal to the processor K, and a short-circuit output end I _ SEATsen2_ MCU _ ADC of the seat motor working current detection unit 7 is used for outputting a short-circuit detection signal to the processor K.

In this embodiment, a memory is disposed in the processor K, and is used for storing at least three seat sitting posture data, where each seat sitting posture data corresponds to a seat adjustment switch position; when the seat adjusting switch detecting unit 1 obtains the switch signal of the corresponding seat adjusting switch, the processor 1 performs adaptive adjustment on the seat sitting posture and the angle and position of the rearview mirror according to the seat sitting posture data of the memory.

In the present embodiment, as can also be seen from fig. 1 and 13, the power supply circuit C is used for supplying power to the seat adjustment switch detection unit 1, the motor operating current detection unit 7, and the mirror direction adjustment motor driving unit 9.

In this embodiment, referring to fig. 1 and 10, the device further includes a rearview mirror switch detecting and waking unit 8, a plurality of different rearview mirror switch detecting and waking units 8 need to be designed for different seats, in this embodiment, 5 rearview mirror switch detecting and waking units 8 are provided, and the structures are consistent.

As a different embodiment, the circuit configuration of the mirror switch detection and wake-up unit 8 may be different.

In the present embodiment, referring to fig. 10 and 11, the rearview mirror switch detecting and waking unit 8 is provided with a voltage dividing unit 81, a one-way voltage stabilizing unit 82, a key input judging unit 83, a control switch unit 84, and a waking detecting unit 85; the voltage dividing unit 81 is provided with a key input terminal RVM _ SW _ CN for receiving a key pressing signal; the voltage dividing unit 81 is provided with a first voltage dividing output end, the first voltage dividing output end is connected with the detection end of the wake-up detection unit 85, and the wake-up detection unit 85 is used for transmitting a wake-up signal to the processor through the wake-up end RVM _ SW _ wake _ N; the switch control terminal RVM _ SW _ CTRL1 of the control switch unit 84 is used for receiving a control switch signal sent by the processor; a control power supply end of the control switch unit 84 is connected with a first voltage division output end of the voltage division unit 81; the key input end RVM _ SW _ CN of the voltage dividing unit 81 is connected to the second voltage dividing output end of the key input judging unit 83 through the one-way voltage stabilizing unit 82; the key input determination unit 83 is configured to send a key input determination signal to the processor through the key input determination terminal RVM _ SW _ ADC.

Referring to fig. 11, the voltage dividing unit 81 includes a resistor R119 and a resistor R120; one end of the resistor R119 is connected with the VS-12V power supply, the other end of the resistor R120 is connected with the common end of the key input end RVM _ SW _ CN, and the key input end RVM _ SW _ CN is connected with the one-way voltage stabilizing unit 82; the other end of the resistor R120 serves as a first voltage division output end, and the first voltage division output end is respectively connected to the control switch unit 84 and the wake-up detection unit 85; the awakening detection unit 85 comprises a PNP triode Q29, an emitting electrode of the PNP triode Q29 is connected with a VS _12V power supply, a base electrode of the PNP triode Q29 is connected with one end of a resistor R84, the other end of the resistor R84 serves as a detection end of the awakening detection unit 85, the detection end is connected with the first voltage division output end and a common end of a power control end, a resistor R85 is connected between the base electrode and the emitting electrode of the PNP triode Q29, and a collector electrode of the PNP triode Q29 is connected with one end of a resistor R86; the other end of the resistor R86 is grounded through a resistor R87 and a capacitor C136 respectively; the other end of the resistor R86 is used as a wake-up detection end RVM _ SW _ AKEUP _ N; the control switching unit 84 includes an NPN transistor Q22; a collector of the NPN transistor Q22 is used as a control power supply terminal, the control power supply terminal is connected to the first voltage division output terminal, an emitter of the NPN transistor Q22 is grounded, an emitter and a base of the NPN transistor Q22 are connected to the resistor R122, a base of the NPN transistor Q22 is connected to one end of the resistor R121, and the other end of the resistor R121 is used as the switch control terminal RVM _ SW _ CTRL 1; the unidirectional voltage regulation unit 82 comprises a voltage regulation diode D19, and the cathode of the voltage regulation diode D19 is connected with the voltage division unit 81; the anode of the zener diode D19 is connected to the key input determination unit 83, and the key input determination unit 83 includes a resistor R126, a resistor R127, and a resistor R128; one end of the resistor R126 is connected with a 12V power switch output signal VS _12V _ CTL of a power circuit, the other end of the resistor R126 is connected with one end of the resistor R127, a common end of the resistor R126 and the resistor R127 serves as a second voltage division output end, and the second voltage division output end is connected with the unidirectional voltage stabilizing unit 82; the other end of the resistor R127 is grounded through a resistor R128, and the common end of the resistor R127 and the resistor R128 serves as a key input judgment end RVM _ SW _ ADC.

As can be seen in fig. 1 and 4, the seat motor driving reverse connection prevention unit 3 comprises a relay K5 and an NPN triode Q1, wherein the relay is of an ACP331-CP1a-12V type;

in this embodiment, referring to fig. 4, a base of the transistor Q1 is connected to one end of a resistor R13, the other end of the resistor R13 serves as a RELAY enabling end of the seat motor drive anti-reverse connection unit 3, an emitter of the transistor Q1 is grounded, a resistor R14 is connected between the emitter and the base of the transistor Q1, a collector of the transistor Q1 is connected to one end of the coil of the RELAY K5 through the resistor R15, the other end of the coil of the RELAY K5 is connected to a cathode of a diode D1, and an anode of the diode D1 is connected to a power source VS _12V _ RELAY; one end of a coil of the relay K5 is connected with the anode of a diode D3, and the cathode of the diode D3 is connected with the anode of the diode D1; one switch end of the relay K5 is connected with the R _ GND ground, and the other switch end of the relay K5 is connected with the M _ GND ground through a resistor R1.

In the embodiment, the seat motor group comprises a seat front-back sliding seat motor, a seat back front-back leaning seat motor, a seat cushion rear height adjusting seat motor and a seat cushion front height adjusting seat motor; eight paths of seat adjusting switch detection circuits are arranged in the seat adjusting switch detection unit 1, each seat motor corresponds to two paths of seat adjusting switch detection circuits, and the eight paths of seat adjusting switch detection circuits are consistent in structure;

the seat motor driving unit 2 comprises four paths of seat motor driving circuits, namely a seat front-back sliding seat motor driving circuit, a seat back front-back leaning seat motor driving circuit, a seat cushion rear height adjusting seat motor driving circuit and a seat cushion front height adjusting seat motor driving circuit;

in this embodiment, in fig. 1, the seat adjustment key signal input terminals of the eight-way seat adjustment switch detection circuit are SSB, SSF, SBR, SBF, CRD, CFD, CRU, and CFU;

in fig. 1, SSB, SSF, SBR, SBF, CRD, CFD, CRU, CFU are denoted by an symbol "EN" to indicate eight seat motor drive signal inputs;

IN fig. 1, HALL indicates SS, SB, CR, and CF, and indicates HALL signal input terminals of four HALL sensors.

In fig. 1, I _ a _ HALL _ ADC indicates SS, SB, CR, and CF, and indicates HALL detection signal terminals of four HALL sensor detection circuits in the HALL sensor detection unit.

In this embodiment, referring to fig. 2, the seat adjustment switch detection circuit includes a transistor Q17, a base of the transistor Q17 is connected to one end of an inductor L9 through a resistor R104, the other end of the inductor L9 is grounded through a capacitor C69, and the other end of the inductor L9 is used as a seat adjustment key signal input end of the seat adjustment switch detection unit 1; the common end of the inductor L9 and the resistor R104 is connected with a 5V power supply through a resistor R100 and a resistor R99, the emitter of the triode Q17 is connected with the common end of the resistor R100 and the resistor R99, the emitter of the triode Q17 is used as the switch detection output end of the seat adjustment switch detection circuit, the emitter of the triode Q17 is grounded through a capacitor C73, and the collector of the triode Q17 is grounded; the other parts also comprise a seat backward sliding seat adjusting switch detection circuit, a seat backrest forward leaning seat adjusting switch detection circuit, a seat backrest backward leaning seat adjusting switch detection circuit, a seat cushion rear upward adjusting seat adjusting switch detection circuit, a seat cushion rear downward adjusting seat adjusting switch detection circuit, a seat cushion front upward adjusting seat adjusting switch detection circuit and a seat cushion front downward adjusting seat adjusting switch detection circuit; the seat adjusting switch detection circuit structure is consistent with the seat forward sliding seat adjusting switch detection circuit structure, and is not described herein, and is detailed in fig. 2.

Referring to fig. 3, any of the seat motor driving circuits includes two seat motor driving signal input terminals and two seat motor driving signal output terminals, and the two seat motor driving signal input terminals and the two seat motor driving signal output terminals are in one-to-one correspondence; a transistor high-level driving circuit and a relay closing driving circuit are sequentially arranged between the seat motor driving signal input end and the seat motor driving signal output end; the ground end of a relay coil in the relay closing drive circuit is isolated by a relay K5 in the seat motor drive reverse connection prevention unit 3.

In the present embodiment, the seat forward and backward slide seat motor driving circuit, the seat back forward and backward reclining seat motor driving circuit, and the seat cushion rear height adjustment seat motor driving circuit share the same transistor high-level driving chip, which is a darlington driving chip, model number ULQ2003D1013 TRY.

The seat motor driving circuit for adjusting the front height of the seat cushion independently adopts two transistor high-level driving circuits for driving, and can be seen by combining fig. 3 that NPN triodes Q2 and Q3 are respectively adopted, and the types are as follows: BC 817-40W.

In the present embodiment, referring to fig. 1, a hall sensor group unit 4 is further included; the Hall signal output end of the Hall sensor group unit 4 is connected with the Hall signal input end of the Hall sensor detection unit 5, and the Hall detection enabling end of the Hall sensor detection unit 5 is used for acquiring a Hall detection enabling signal sent by the processor K; a Hall detection signal end of the Hall sensor detection unit 5 feeds a Hall detection signal back to the processor K; the Hall power supply device is characterized in that a Hall sensor power supply unit 6 is further connected to a Hall power supply end of the Hall sensor group unit 4, a Hall power supply enabling end of the Hall sensor power supply unit 6 is used for acquiring a Hall power supply enabling signal sent by the processor K, a Hall power supply collecting end of the Hall sensor power supply unit 6 is used for feeding back the Hall power supply collecting signal to the processor K, and a Hall power supply end of the Hall sensor power supply unit 6 is connected with a Hall power supply end of the Hall sensor group unit 4.

In this embodiment, the hall sensor detection unit 5 includes four detection branches, which are a seat front and rear slide seat motor hall detection branch, a seat back front and rear leaning seat motor hall detection branch, a seat cushion rear height adjustment seat motor hall detection branch, and a seat cushion front height adjustment seat motor hall detection branch, respectively;

a seat front-rear sliding seat motor Hall signal input end of the seat front-rear sliding seat motor Hall detection branch circuit is connected with one end of a resistor R37 through a resistor R26, the other end of the resistor R37 is grounded through a capacitor C10, and the other end of the resistor R37 is used as a seat front-rear sliding seat motor Hall detection signal end of the seat front-rear sliding seat motor Hall detection branch circuit; the common end of the resistor R26 and the resistor R37 is connected with the collector of an NPN triode Q4 after passing through a resistor R33, the base of the triode Q4 is connected with one end of a resistor R27, the other end of the resistor R27 is used as the Hall detection enabling end of the Hall sensor detection unit 5, the emitter of the triode Q4 is grounded, and a resistor R32 is connected between the emitter and the base of the triode Q4;

specifically referring to fig. 5, a seat back front-back leaning seat motor hall signal input end of the seat back front-back leaning seat motor hall detection branch circuit is connected with one end of a resistor R38 through a resistor R29, the other end of the resistor R38 is grounded through a capacitor C11, and the other end of the resistor R38 is used as a seat back front-back leaning seat motor hall detection signal end of the seat back front-back leaning seat motor hall detection branch circuit; the common end of the resistor R29 and the resistor R38 is connected with the collector of the triode Q4 after passing through the resistor R34;

referring to fig. 5, a seat cushion rear height adjustment seat motor hall signal input end of the seat cushion rear height adjustment seat motor hall detection branch is connected with one end of a resistor R39 through a resistor R30, the other end of the resistor R39 is grounded through a capacitor C12, and the other end of the resistor R39 is used as a seat cushion rear height adjustment seat motor hall detection signal end of the seat cushion rear height adjustment seat motor hall detection branch; the common end of the resistor R30 and the resistor R39 is connected with the collector of the triode Q4 after passing through the resistor R35;

referring to fig. 5, a seat cushion front height adjusting seat motor hall signal input end of the seat cushion front height adjusting seat motor hall detection branch is connected with one end of a resistor R40 through a resistor R31, the other end of the resistor R40 is grounded through a capacitor C13, and the other end of the resistor R40 is used as a seat cushion front height adjusting seat motor hall detection signal end of the seat cushion front height adjusting seat motor hall detection branch; the common end of the resistor R31 and the resistor R40 is connected with the collector of the triode Q4 after passing through the resistor R36;

referring to fig. 6, the hall sensor power supply unit 6 includes an NPN transistor Q6, a base of the transistor Q6 is connected to one end of a resistor R43, the other end of the resistor R43 serves as a hall power supply enable terminal of the hall sensor power supply unit 6, an emitter of the transistor Q6 is grounded, a resistor R44 is connected between the emitter and the base of the transistor Q6, a collector of the transistor Q6 is connected to a collector of a PNP transistor Q5 through a resistor R46, an emitter of the transistor Q5 is connected to a VS _12V power supply, a base of the transistor Q5 is connected to a VS _12V power supply through a resistor R42 and a resistor R41, a collector of the transistor Q5 and a common terminal of the resistor R46 are connected to common terminals of the resistor R42 and the resistor R41 through a resistor R45, two ends of the resistor R639 are connected in parallel to a capacitor C14, a collector and a common terminal of the transistor Q5 and a collector and a gate of the resistor R46 are connected to a gate, the source of MOS pipe Q7 the common terminal of resistance R42, resistance R41 is connected, the drain-source resistance of MOS pipe Q7 is connected with the positive pole of diode D11 through inductance L5, the negative pole of diode D11 is as the hall power supply end of hall sensor power supply unit 6, the drain-source resistance of MOS pipe Q7 with the common terminal of inductance L5 is through resistance R47, resistance R48 ground connection, resistance R47, resistance R48 common terminal are connected with the one end of resistance R49, the other end of resistance R49 is as the hall power supply collection end of hall sensor power supply unit 6.

Referring to fig. 7, the seat motor working current detection unit 7 is provided with a seat motor overcurrent detection branch a and a seat motor short-circuit detection branch B;

as can be further seen from fig. 7, the seat motor over-current detection branch a includes an over-current sampling filter module a1, an over-current sampling input terminal of the over-current sampling filter module a1 is configured to obtain a seat motor sampling differential voltage, an over-current sampling output terminal of the over-current sampling filter module a1 is connected to an over-current signal input terminal of the seat motor over-current signal linear amplification module a2, and an over-current output terminal of the seat motor over-current signal linear amplification module a2 is configured to output an over-current detection signal to the processor K; the seat motor short circuit detection branch circuit B comprises a short circuit sampling filtering module B1, a short circuit sampling input end of the short circuit sampling filtering module B1 is used for obtaining seat motor sampling voltage, a short circuit sampling output end of the short circuit sampling filtering module B1 is connected with a short circuit signal input end of a seat motor short circuit signal linear amplification module B2, and a short circuit output end of the seat motor short circuit signal linear amplification module B2 is used for outputting a short circuit detection signal to the processor K;

in this embodiment, the seat motor sampling voltage high-voltage end VIN + of the overcurrent sampling filtering module a1 and the seat motor sampling voltage VIN + obtained by the short-circuit sampling input end of the short-circuit sampling filtering module B1 both come from a seat motor drive anti-reverse connection circuit.

Referring to fig. 8, the over-current sampling filter module a1 includes a resistor R76 and a resistor R5, a capacitor C56 is connected in parallel to two ends of the resistor R5, a common end of the resistor R76 and the resistor R5 is used as an over-current sampling output end of the over-current sampling filter module a1, and one end of the resistor R76, which is far away from the common end of the resistor R76 and the resistor R5, is used as an over-current sampling input end of the over-current sampling filter module a 1;

the seat motor overcurrent signal linear amplification module A2 comprises an operational amplifier IC3B, wherein the model of the operational amplifier IC3B is BA2904YF-M in the embodiment. The non-inverting input end of the operational amplifier IC3B is used as the overcurrent signal input end of the seat motor overcurrent signal linear amplification module a2, and is connected with the common end of the resistor R76 and the resistor R5, the inverting input end of the operational amplifier IC3B is grounded through the resistor R75, the output end of the operational amplifier IC3B is connected with the inverting input end of the operational amplifier IC3B through the resistor R6 and the capacitor C57 which are connected in parallel, the output end of the operational amplifier IC3B is connected with one end of the resistor R8, and the other end of the resistor R8 is used as the overcurrent output end I _ setsen _ MCU _ ADC of the seat motor overcurrent signal linear amplification module a 2. The resistance values of the components in this embodiment are shown in fig. 8.

Referring to fig. 8, in this embodiment, the short circuit sampling filtering module B1 in the seat motor short circuit detection branch B includes a resistor R9 and a resistor R11, a capacitor C59 is connected in parallel to two ends of the resistor R11, a common end of the resistor R9 and the resistor R11 serves as a short circuit sampling output end of the short circuit sampling filtering module B1, and an end of the resistor R9, which is far away from the common end of the resistor R9 and the resistor R11, serves as a short circuit sampling input end of the short circuit sampling filtering module B1;

the seat motor short circuit signal linear amplification module B2 includes an operational amplifier IC3A, a positive phase input terminal of the operational amplifier IC3A is used as a short circuit signal input terminal of the seat motor short circuit signal linear amplification module B2, and is connected with a common terminal of the resistor R9 and the resistor R11, an inverting input terminal of the operational amplifier IC3A is grounded through the resistor R10, an output terminal of the operational amplifier IC3A is connected with an inverting input terminal of the operational amplifier IC3A through a resistor R50 and a capacitor C134 which are connected in parallel, an output terminal of the operational amplifier IC3A is connected with one end of the resistor R12, and the other end of the resistor R12 is used as a short circuit output terminal I _ SEATsen2_ MCU _ ADC of the seat motor short circuit signal linear amplification module B2.

In this embodiment, the overcurrent output terminal I _ SEATsen _ MCU _ ADC of the seat motor overcurrent signal linear amplification module a2 corresponds to a current measurement range of 0 to 25A, and is used for seat motor overcurrent protection; the corresponding current measurement range of the short-circuit output end I _ SEATSen2_ MCU _ ADC of the seat motor short-circuit signal linear amplification module B2 is 0-88A, and the seat motor short-circuit signal linear amplification module B is used for seat motor short-circuit protection.

Referring to fig. 13 and 7, the power input terminal of the power supply circuit C is configured to obtain a 12V power supply, and the power enable terminal of the power supply circuit C is configured to obtain a power enable signal VCC5V _2_ EN sent by the processor K; and the 5V power output end of the power circuit C is used for supplying power to the seat motor overcurrent signal linear amplification module A2 and the seat motor short-circuit signal linear amplification module B2.

Referring to fig. 1, the device further comprises a rearview mirror motor position sensor detection unit 11, a rearview mirror motor position sensor power circuit 12 and a rearview mirror motor position sensor group 13; the rear-view mirror motor position sensors in the rear-view mirror motor position sensor group 13 are installed in one-to-one correspondence with the rear-view mirror motors, a rear-view mirror position detection input end of the rear-view mirror motor position sensor detection unit 11 is used for acquiring rear-view mirror sensing signals of the rear-view mirror motor position sensors, and a rear-view mirror position detection output end of the rear-view mirror motor position sensor detection unit 11 is used for feeding back rear-view mirror position signals to the processor K; the power supply end of the power supply circuit 12 of the rearview mirror motor position sensor is used for supplying power to the rearview mirror motor position sensor, the power supply enabling end of the power supply circuit 12 of the rearview mirror motor position sensor is connected with the processor K, and the power supply feedback end of the power supply circuit 12 of the rearview mirror motor position sensor is connected with the processor K;

in this embodiment, the rearview mirror motor set includes four rearview mirror motors, which are respectively: a left side left and right deflection rearview mirror motor, a left side up and down deflection rearview mirror motor, a right side left and right deflection rearview mirror motor and a right side up and down deflection rearview mirror motor;

referring to fig. 9, the mirror direction adjusting motor driving unit 9 includes a mirror motor driving chip IC4, the model of which is L99MD02XP, of a mirror motor driving chip IC 4; a seventh pin of the rearview mirror motor driving chip IC4 is connected to one end of a resistor R55, the other end of the resistor R55 serves as a driving signal input end of a rearview mirror motor on the left side of the rearview mirror direction adjusting motor driving unit 9, and the seventh pin of the rearview mirror motor driving chip IC4 is grounded through a resistor R58 and a capacitor C17; an eighth pin of the rearview mirror motor driving chip IC4 is connected to one end of a resistor R56, and the other end of the resistor R56 serves as a driving signal input terminal of a rearview mirror motor on the right side of the rearview mirror direction adjusting motor driving unit 9; an eighth pin of the rearview mirror motor driving chip IC4 is grounded through a resistor R57 and a capacitor C16 respectively; the second pin, the third pin, the sixteenth pin and the seventeenth pin of the rearview mirror motor driving chip IC4 are correspondingly connected with the four rearview mirror motors one by one; a thirtieth pin, a second eighth pin, a second sixth pin and a second fourth pin of the rearview mirror motor driving chip IC4 are respectively connected with four rearview mirror driving feedback ends of the processor K in a one-to-one corresponding manner;

referring to four diagrams a, b, c and d in fig. 12, the rear view mirror motor position sensor detecting unit 11 includes four rear view mirror motor position sensor detecting circuits, the four rear view mirror motor position sensor detecting circuits have the same structure, and include a detecting resistor Rjc, both ends of the detecting resistor Rjc are grounded via a capacitor, one end of the detecting resistor Rjc serves as a rear view mirror position detecting input end, and the other end of the detecting resistor Rjc serves as a rear view mirror position detecting output end;

referring to fig. 13, the power circuit 12 of the rearview mirror motor position sensor includes a PNP transistor Q10, an emitter of the transistor Q10 is connected to a base of the transistor Q10 through a capacitor C31 and a resistor R68, an emitter of the transistor Q10 is connected to a base of a PNP transistor Q8 through a resistor R65, an emitter of the transistor Q10 is connected to an output terminal of VCC5V of the power circuit C through a resistor R64, an emitter of the transistor Q8 is connected to an output terminal of VCC5V of the power circuit C, a collector of the transistor Q8 is connected to a base of the transistor Q10, a base of the transistor Q10 is connected to a collector of the transistor Q9 through a resistor R69, a base of the transistor Q9 is connected to one end of a resistor R66, and the other end of the resistor R66 serves as a sensor power supply enabling end of the power circuit 12 of the rearview mirror motor position sensor for connection with the processor K, the emitter of the triode Q9 is grounded, and a resistor R67 is connected between the emitter and the base of the triode Q9; the collector of the triode Q10 is grounded through a capacitor C32, the collector of the triode Q10 is grounded through a resistor R70 and a resistor R71, the common end of the resistor R70 and the resistor R71 is connected with one end of the resistor R72, and the other end of the resistor R72 is used as a sensor power supply feedback end of the rearview mirror motor position sensor power circuit 12; the collector of the triode Q10 is also connected with the anode of a voltage stabilizing diode D15 through an inductor L4, and the cathode of the voltage stabilizing diode D15 is used as the power supply end of the power supply circuit 12 of the rearview mirror motor position sensor.

Referring to fig. 15 and 16, the power circuit C includes a 12V power switch unit C5, and a power current limiting, decoupling, and bypass unit C1, a low dropout voltage regulator unit C2, a power decoupling unit C3, and a 5V power switch unit C4, which are connected in sequence; the 12V switch input end of the 12V power switch unit C5 is used for receiving a 12V power switch driving signal sent by a processor, and the power supply end of the 12V power switch unit C5 is connected with a VS-12V power supply; a 12V switch output end of the 12V power switch unit C5 outputs a 12V power switch output signal VS _12V _ CTL; the 12V switch output end of the 12V power switch unit C5 supplies power to the seat adjusting switch detection unit 1 and the rearview mirror switch detection and wake-up unit 8;

in this embodiment, as can be seen from fig. 15 and 14, the power current-limiting decoupling and bypass unit C1 includes a current-limiting resistor R62, one end of the current-limiting resistor R62 serves as a power input end of the power circuit C, the other end of the current-limiting resistor R62 is grounded via a polar capacitor C27, and the other end of the resistor R62 is grounded via a capacitor C28 and a capacitor C29 connected in series in sequence;

in this embodiment, as shown in fig. 15 and 14, the ldo regulator unit C2 includes a ldo regulator IC5, which has a type: the BD450M2FP3-CE2, the input end of the low dropout regulator IC5 is connected with the other end of the current-limiting resistor R62, and the output end of the low dropout regulator IC5 is connected with the power supply decoupling unit C3;

in this embodiment, as can be seen from fig. 15 and 14, the power decoupling unit C3 includes a capacitor C30 and a resistor R63, one end of the capacitor C30 is connected to one end of the resistor R63, the other end of the capacitor C30 is grounded, a common end of the capacitor C30 and the resistor R63 is connected to an output end of the low dropout regulator IC5, the other end of the resistor R63 is connected to the 5V power switch unit C4, and the other end of the resistor R63 and the common end of the 5V power switch unit C4 also serve as a first 5V power output end of the power circuit C; the first 5V power output end of the power circuit C is used for supplying power to the power circuit 12 of the rearview mirror motor position sensor;

in this embodiment, as can be seen from fig. 15, 14 and 16, the 5V power switch unit C4 includes a P-channel enhancement type MOS fet Q13, a source S of the P-channel enhancement type MOS fet Q13 is connected to the other end of the resistor R63, the source S of the fet Q13 is connected to a gate G of the fet Q13 through a resistor R92 and a capacitor C63 which are connected in parallel, the gate G of the fet Q13 serves as a power enable terminal of the power circuit C, and a drain of the fet Q13 serves as a second 5V power output terminal VCC5V _2 of the power circuit C;

in this embodiment, as can be seen from fig. 14, the second 5V power output terminal VCC5V _2 of the power circuit C is used for supplying power to the mirror direction adjusting motor driving unit 9 and the motor operating current detecting unit 7.

When the seat adjusting key signal input end of the seat adjusting switch detection unit 1 acquires a low level, a PNP triode in the seat adjusting switch detection unit 1 is conducted and powered on, so that the switch detection output end of the whole seat adjusting switch detection unit 1 outputs a high level to a processor, the high level driving processor outputs a high level to the seat motor driving signal input end of the corresponding seat motor driving unit, and the corresponding seat motor driving unit 2 starts to work. Meanwhile, the processor drives the rearview mirror direction adjusting motor driving unit 9 to drive the rearview mirror direction adjusting motor to act. At this time, the transistor inside the seat motor driving unit 2 is driven to be turned on by a high level, so that the corresponding relay coil is energized, and the seat motor of the key pair is driven to start working. If the rearview mirror does not meet the requirements of a driver, the rearview mirror can be adjusted with higher precision through the rearview mirror adjusting switch.

In the circuit, a seat motor drive reverse connection prevention unit 3 is arranged on a relay grounding wire of a seat motor drive unit 2, and the on-off state of the seat motor drive reverse connection prevention unit 3 is controlled by a processor so as to control whether the grounding wire is grounded. When the seat motor drive reverse connection prevention unit 3 does not work, the seat motor does not malfunction, thereby realizing reverse connection protection of the seat motor drive unit.

And a Hall sensor is also arranged on each seat motor, so that the position and the rotation angle of each seat motor in the seat can be acquired, and the whole circuit can realize signal control and feedback closed loop.

The seat motor overcurrent detection branch in the seat motor working current detection unit 7 acquires the differential voltage on the seat motor drive reverse connection prevention circuit, and the seat motor overcurrent detection branch is processed and amplified to obtain an overcurrent detection signal which is transmitted to the processor. The seat motor short circuit detection branch of the seat motor working current detection unit 7 acquires a voltage signal in the seat motor reverse connection prevention circuit, and the voltage amplified through fixing linearity is used for feeding back to the processor, so that the function of detecting the short circuit current is achieved.

The power circuit C outputs a 5V or 12V power signal after acquiring the enabling signal sent by the processor, and supplies power to units such as the rearview mirror direction adjusting motor driving unit 9, the motor working current detecting unit 7, the rearview mirror motor position sensor power circuit 12, the seat adjusting switch detecting unit 1, the rearview mirror switch detecting and awakening unit 8 and the like.

It should be noted that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make variations, modifications, additions or substitutions within the spirit and scope of the present invention.

Claims

1. A rearview mirror synchronous tracking and feedback adjusting circuit based on automobile seat memory adjustment is characterized in that: the device comprises a seat adjusting switch detection unit (1), a seat motor driving unit (2), a seat motor driving reverse connection prevention unit (3), a motor working current detection unit (7), a rearview mirror direction adjusting motor driving unit (9) and a power circuit (C);

a seat adjusting key signal input end of the seat adjusting switch detection unit (1) is used for acquiring an adjusting key signal, and a switch detection output end of the seat adjusting switch detection unit (1) is used for sending a seat adjusting switch detection signal to the processor (K);

a seat motor driving signal input end of the seat motor driving unit (2) is used for receiving a seat motor control signal sent by the processor (K), and seat motor driving signal output ends of all the seat motors of the seat motor driving unit (2) are connected with seat motors of a seat motor set in a one-to-one correspondence manner;

a rearview mirror motor driving signal input end of the rearview mirror direction adjusting motor driving unit (9) is used for receiving a rearview mirror motor control signal sent by the processor (K), and all rearview mirror motor driving signal output ends of the rearview mirror direction adjusting motor driving unit (9) are connected with rearview mirror motors of a rearview mirror motor group in a one-to-one correspondence manner;

a relay grounding wire of the seat motor driving unit (2) is connected with a seat motor driving reverse connection prevention unit (3), and a relay enabling end of the seat motor driving reverse connection prevention unit (3) is used for acquiring a relay enabling signal sent by the processor (K);

the seat motor driving reverse connection prevention unit (3) is further provided with a motor current sampling end, the motor current sampling end of the seat motor driving reverse connection prevention unit (3) is connected with a current sampling input end of the motor working current detection unit (7), an overcurrent output end of the motor working current detection unit (7) outputs an overcurrent detection signal to the processor (K), and a short circuit output end of the motor working current detection unit (7) is used for outputting a short circuit detection signal to the processor (K);

and the power circuit (C) is used for supplying power to the seat adjusting switch detection unit (1), the motor working current detection unit (7) and the rearview mirror direction adjusting motor driving unit (9).

2. The vehicle seat memory adjustment-based rearview mirror synchronous tracking and feedback adjustment circuit as claimed in claim 1, wherein: the rearview mirror switch detection and awakening device is characterized by further comprising a rearview mirror switch detection and awakening unit (8), wherein the rearview mirror switch detection and awakening unit (8) is provided with a voltage division unit (81), a one-way voltage stabilization unit (82), a key input judgment unit (83), a control switch unit (84) and an awakening detection unit (85);

the voltage division unit (81) is provided with a key input end RVM _ SW _ CN, and the key input end RVM _ SW _ CN is used for receiving a key pressing signal;

the voltage dividing unit (81) is provided with a first voltage dividing output end which is connected with a detection end of the awakening detection unit (85), and the awakening detection unit (85) is used for transmitting an awakening signal to the processor through an awakening end RVM _ SW _ WAKEUP _ N;

the switch control terminal RVM _ SW _ CTRL1 of the control switch unit (84) is used for receiving a control switch signal sent by the processor; the control power supply end of the control switch unit (84) is connected with the first voltage division output end of the voltage division unit (81);

the key input end RVM _ SW _ CN of the voltage dividing unit (81) is connected with the second voltage dividing output end of the key input judging unit (83) through the one-way voltage stabilizing unit (82); the key input judgment unit (83) is used for sending a key input judgment signal to the processor through the key input judgment terminal RVM _ SW _ ADC.

3. The vehicle seat memory adjustment-based rearview mirror synchronous tracking and feedback adjustment circuit as claimed in claim 2, wherein: the voltage division unit (81) comprises a resistor R119 and a resistor R120; one end of the resistor R119 is connected with the VS-12V power supply, the other end of the resistor R120 is connected with the common end of the key input end RVM _ SW _ CN, and the key input end RVM _ SW _ CN is connected with the one-way voltage stabilizing unit (82); the other end of the resistor R120 is used as a first voltage division output end which is respectively connected with the control switch unit (84) and the awakening detection unit (85);

the awakening detection unit (85) comprises a PNP triode Q29, an emitting electrode of the PNP triode Q29 is connected with a VS _12V power supply, a base electrode of the PNP triode Q29 is connected with one end of a resistor R84, the other end of the resistor R84 serves as a detection end of the awakening detection unit (85), the detection end is connected with the first voltage division output end and a common end of a control power supply end, a resistor R85 is connected between the base electrode and the emitting electrode of the PNP triode Q29, and a collector electrode of the PNP triode Q29 is connected with one end of a resistor R86; the other end of the resistor R86 is grounded through a resistor R87 and a capacitor C136 respectively; the other end of the resistor R86 is used as a wake-up detection end RVM _ SW _ AKEUP _ N;

the control switch unit (84) comprises an NPN triode Q22; a collector of the NPN transistor Q22 is used as a control power supply terminal, the control power supply terminal is connected to the first voltage division output terminal, an emitter of the NPN transistor Q22 is grounded, an emitter and a base of the NPN transistor Q22 are connected to the resistor R122, a base of the NPN transistor Q22 is connected to one end of the resistor R121, and the other end of the resistor R121 is used as the switch control terminal RVM _ SW _ CTRL 1; the unidirectional voltage stabilizing unit (82) comprises a voltage stabilizing diode D19, and the cathode of the voltage stabilizing diode D19 is connected with the voltage dividing unit (81); the anode of the voltage stabilizing diode D19 is connected with the key input judgment unit (83)

The key input judgment unit (83) comprises a resistor R126, a resistor R127 and a resistor R128; one end of the resistor R126 is connected with a 12V power switch output signal VS _12V _ CTL of a power circuit, the other end of the resistor R126 is connected with one end of the resistor R127, a common end of the resistor R126 and the resistor R127 serves as a second voltage division output end, and the second voltage division output end is connected with the unidirectional voltage stabilizing unit (82); the other end of the resistor R127 is grounded through a resistor R128, and the common end of the resistor R127 and the resistor R128 serves as a key input judgment end RVM _ SW _ ADC.

4. The vehicle seat memory adjustment-based rearview mirror synchronous tracking and feedback adjustment circuit as claimed in claim 1, wherein: the seat motor drive reverse connection prevention unit (3) comprises a relay K5 and an NPN triode Q1, wherein the model of the relay is ACP331-CP1 a-12V;

the base electrode of the triode Q1 is connected with one end of a resistor R13, the other end of the resistor R13 is used as the RELAY enabling end of the seat motor drive reverse connection prevention unit (3), the emitter electrode of the triode Q1 is grounded, a resistor R14 is connected between the emitter electrode and the base electrode of the triode Q1, the collector electrode of the triode Q1 is connected with one end of a coil of the RELAY K5 through a resistor R15, the other end of the coil of the RELAY K5 is connected with the cathode of a diode D1, and the anode of the diode D1 is connected with a power supply VS _12V _ RELAY; one end of a coil of the relay K5 is connected with the anode of a diode D3, and the cathode of the diode D3 is connected with the anode of the diode D1; one switch end of the relay K5 is connected with the R _ GND ground, and the other switch end of the relay K5 is connected with the M _ GND ground through a resistor R1.

5. The vehicle seat memory adjustment-based rearview mirror synchronous tracking and feedback adjustment circuit as claimed in claim 4, wherein: the seat motor group comprises a seat front-back sliding seat motor, a seat back front-back leaning seat motor, a seat cushion rear part height adjusting seat motor and a seat cushion front part height adjusting seat motor; eight paths of seat adjusting switch detection circuits are arranged in the seat adjusting switch detection unit (1), each seat motor corresponds to two paths of seat adjusting switch detection circuits, and the eight paths of seat adjusting switch detection circuits are consistent in structure; the seat motor driving unit (2) comprises four paths of seat motor driving circuits, namely a seat front-back sliding seat motor driving circuit, a seat back front-back leaning seat motor driving circuit, a seat cushion rear height adjusting seat motor driving circuit and a seat cushion front height adjusting seat motor driving circuit;

the seat adjusting switch detection circuit comprises a triode Q17, the base electrode of the triode Q17 is connected with one end of an inductor L9 after passing through a resistor R104, the other end of the inductor L9 is grounded through a capacitor C69, and the other end of the inductor L9 is used as the seat adjusting key signal input end of the seat adjusting switch detection unit (1); the common end of the inductor L9 and the resistor R104 is connected with a 5V power supply through a resistor R100 and a resistor R99, the emitter of the triode Q17 is connected with the common end of the resistor R100 and the resistor R99, the emitter of the triode Q17 is used as the switch detection output end of the seat adjustment switch detection circuit, the emitter of the triode Q17 is grounded through a capacitor C73, and the collector of the triode Q17 is grounded;

any seat motor driving circuit comprises two seat motor driving signal input ends and two seat motor driving signal output ends, and the two seat motor driving signal input ends and the two seat motor driving signal output ends are in one-to-one correspondence; a transistor high-level driving circuit and a relay closing driving circuit are sequentially arranged between the seat motor driving signal input end and the seat motor driving signal output end; and the ground end of a relay coil in the relay closing drive circuit is isolated by a relay K5 in the seat motor drive reverse connection prevention unit (3).

6. The vehicle seat memory adjustment-based rearview mirror synchronous tracking and feedback adjustment circuit as claimed in claim 5, wherein: the sensor group unit also comprises a Hall sensor group unit (4); the Hall signal output end of the Hall sensor group unit (4) is connected with the Hall signal input end of the Hall sensor detection unit (5), and the Hall detection enabling end of the Hall sensor detection unit (5) is used for acquiring a Hall detection enabling signal sent by the processor (K); a Hall detection signal end of the Hall sensor detection unit (5) feeds a Hall detection signal back to the processor (K); the Hall power supply device is characterized in that a Hall sensor power supply unit (6) is further connected to a Hall power supply end of the Hall sensor group unit (4), a Hall power supply enabling end of the Hall sensor power supply unit (6) is used for acquiring a Hall power supply enabling signal sent by the processor (K), a Hall power supply acquisition end of the Hall sensor power supply unit (6) is used for feeding back the Hall power supply acquisition signal to the processor (K), and a Hall power supply end of the Hall sensor power supply unit (6) is connected with a Hall power supply end of the Hall sensor group unit (4).

7. The vehicle seat memory adjustment-based rearview mirror synchronous tracking and feedback adjustment circuit as claimed in claim 6, wherein: the Hall sensor detection unit (5) comprises four detection branches, namely a seat front-back sliding seat motor Hall detection branch, a seat back front-back leaning seat motor Hall detection branch, a seat cushion rear height adjusting seat motor Hall detection branch and a seat cushion front height adjusting seat motor Hall detection branch;

a seat front-rear sliding seat motor Hall signal input end of the seat front-rear sliding seat motor Hall detection branch circuit is connected with one end of a resistor R37 through a resistor R26, the other end of the resistor R37 is grounded through a capacitor C10, and the other end of the resistor R37 is used as a seat front-rear sliding seat motor Hall detection signal end of the seat front-rear sliding seat motor Hall detection branch circuit; the common end of the resistor R26 and the resistor R37 is connected with the collector of an NPN triode Q4 after passing through a resistor R33, the base of the triode Q4 is connected with one end of a resistor R27, the other end of the resistor R27 is used as the Hall detection enabling end of the Hall sensor detection unit (5), the emitter of the triode Q4 is grounded, and a resistor R32 is connected between the emitter and the base of the triode Q4;

the Hall sensor power supply unit (6) comprises an NPN triode Q6, the base electrode of the triode Q6 is connected with one end of a resistor R43, the other end of the resistor R43 is used as the Hall power supply enabling end of the Hall sensor power supply unit (6), the emitter electrode of the triode Q6 is grounded, a resistor R44 is connected between the emitter electrode and the base electrode of the triode Q6, the collector electrode of the triode Q6 is connected with the collector electrode of a PNP triode Q5 through a resistor R46, the emitter electrode of the triode Q5 is connected with a VS _12V power supply, the base electrode of the triode Q5 is connected with a VS _12V power supply through a resistor R42 and a resistor R41, the collector electrode of the triode Q5 is connected with the common end of the resistor R46 through a resistor R45 and the common end of the resistor R42 and the resistor R41, the two ends of the resistor R9 are connected in parallel with a capacitor C14, the common end of the collector electrode of the triode Q5 and the common end of the, the source of MOS pipe Q7 the common terminal of resistance R42, resistance R41 is connected, the drain-source resistance of MOS pipe Q7 is connected with the positive pole of diode D11 through inductance L5, the negative pole of diode D11 is as the hall power supply end of hall sensor power supply unit (6), the drain-source resistance of MOS pipe Q7 with inductance L5's common terminal is through resistance R47, resistance R48 ground connection, resistance R47, resistance R48 common terminal are connected with the one end of resistance R49, the other end of resistance R49 is as the hall power supply collection end of hall sensor power supply unit (6).

8. The vehicle seat memory adjustment-based rearview mirror synchronous tracking and feedback adjustment circuit as claimed in claim 7, wherein: the seat motor working current detection unit (7) comprises a seat motor overcurrent detection branch (A) and a seat motor short circuit detection branch (B);

the seat motor over-current detection branch circuit (A) comprises an over-current sampling filtering module (A1), an over-current sampling input end of the over-current sampling filtering module (A1) is used for acquiring seat motor sampling differential voltage, an over-current sampling output end of the over-current sampling filtering module (A1) is connected with an over-current signal input end of a seat motor over-current signal linear amplification module (A2), and an over-current output end of the seat motor over-current signal linear amplification module (A2) is used for outputting an over-current detection signal to the processor (K);

the seat motor short circuit detection branch circuit (B) comprises a short circuit sampling filtering module (B1), the short circuit sampling input end of the short circuit sampling filtering module (B1) is used for obtaining seat motor sampling voltage, the short circuit sampling output end of the short circuit sampling filtering module (B1) is connected with the short circuit signal input end of the seat motor short circuit signal linear amplification module (B2), and the short circuit output end of the seat motor short circuit signal linear amplification module (B2) is used for outputting a short circuit detection signal to the processor (K);

the power supply input end of the power supply circuit (C) is used for obtaining a 12V power supply, and the power supply enabling end of the power supply circuit (C) is used for obtaining a power supply enabling signal VCC5V _2_ EN sent by the processor (K); and the 5V power output end of the power circuit (C) is used for supplying power to the seat motor overcurrent signal linear amplification module (A2) and the seat motor short circuit signal linear amplification module (B2).

9. The vehicle seat memory adjustment-based rearview mirror synchronous tracking and feedback adjustment circuit as claimed in claim 2, wherein: the rearview mirror motor position sensor detection unit (11), a rearview mirror motor position sensor power circuit (12) and a rearview mirror motor position sensor group (13) are also included; rear-view mirror motor position sensors in the rear-view mirror motor position sensor group (13) are installed in one-to-one correspondence with the rear-view mirror motors, a rear-view mirror position detection input end of the rear-view mirror motor position sensor detection unit (11) is used for acquiring rear-view mirror sensing signals of the rear-view mirror motor position sensors, and a rear-view mirror position detection output end of the rear-view mirror motor position sensor detection unit (11) is used for feeding back rear-view mirror position signals to the processor (K); the power supply end of the power circuit (12) of the rearview mirror motor position sensor is used for supplying power to the rearview mirror motor position sensor, the power supply enabling end of the power circuit (12) of the rearview mirror motor position sensor is connected with the processor (K), and the power supply feedback end of the power circuit (12) of the rearview mirror motor position sensor is connected with the processor (K);

the rearview mirror direction adjusting motor driving unit (9) comprises a rearview mirror motor driving chip IC4, and the model of the rearview mirror motor driving chip IC4 is L99MD02 XP; a seventh pin of the rearview mirror motor driving chip IC4 is connected with one end of a resistor R55, the other end of the resistor R55 is used as a driving signal input end of a rearview mirror motor on the left side of the rearview mirror direction adjusting motor driving unit (9), and the seventh pin of the rearview mirror motor driving chip IC4 is grounded through a resistor R58 and a capacitor C17 respectively; an eighth pin of the rearview mirror motor driving chip IC4 is connected with one end of a resistor R56, and the other end of the resistor R56 is used as a driving signal input end of a rearview mirror motor on the right side of the rearview mirror direction adjusting motor driving unit (9); an eighth pin of the rearview mirror motor driving chip IC4 is grounded through a resistor R57 and a capacitor C16 respectively; the second pin, the third pin, the sixteenth pin and the seventeenth pin of the rearview mirror motor driving chip IC4 are correspondingly connected with the four rearview mirror motors one by one; the thirtieth pin, the eighth pin, the sixth pin and the fourth pin of the rearview mirror motor driving chip IC4 are respectively connected with the four rearview mirror driving feedback ends of the processor (K) in a one-to-one correspondence manner;

the rearview mirror motor position sensor detection unit (11) comprises four paths of rearview mirror motor position sensor detection circuits, the four paths of rearview mirror motor position sensor detection circuits are consistent in structure and comprise detection resistors Rjc, two ends of each detection resistor Rjc are grounded through a capacitor, one end of each detection resistor Rjc serves as a rearview mirror position detection input end, and the other end of each detection resistor Rjc serves as a rearview mirror position detection output end;

the rearview mirror motor position sensor power supply circuit (12) comprises a PNP triode Q10, an emitter of a triode Q10 is connected with a base of a triode Q10 through a capacitor C31 and a resistor R68 respectively, an emitter of a triode Q10 is connected with a base of a PNP triode Q8 through a resistor R65, an emitter of the triode Q10 is connected with an output end of VCC5V of the power supply circuit (C) through a resistor R64, an emitter of the triode Q8 is connected with an output end of VCC5V of the power supply circuit (C), a collector of the triode Q8 is connected with a base of the triode Q10, a base of the triode Q10 is connected with a collector of an NPN triode Q9 through a resistor R69, a base of the triode Q9 is connected with one end of a resistor R66, and the other end of the resistor R66 is used as a sensor power supply enabling end of the rearview mirror motor position sensor power supply circuit (12) and is connected with the processor (K), the emitter of the triode Q9 is grounded, and a resistor R67 is connected between the emitter and the base of the triode Q9; the collector of the triode Q10 is grounded through a capacitor C32, the collector of the triode Q10 is grounded through a resistor R70 and a resistor R71, the common end of the resistor R70 and the resistor R71 is connected with one end of a resistor R72, and the other end of the resistor R72 is used as a sensor power supply feedback end of the rearview mirror motor position sensor power circuit (12); the collector of the triode Q10 is also connected with the anode of a voltage stabilizing diode D15 through an inductor L4, and the cathode of the voltage stabilizing diode D15 is used as the power supply end of the power supply circuit (12) of the rearview mirror motor position sensor.

10. The vehicle seat memory adjustment-based rearview mirror synchronous tracking and feedback adjustment circuit as claimed in claim 9, wherein: the power circuit (C) comprises a 12V power switch unit (C5), a power current limiting, decoupling and bypass unit (C1), a low-dropout voltage stabilizing unit (C2), a power decoupling unit (C3) and a 5V power switch unit (C4), which are connected in sequence;

the 12V switch input end of the 12V power switch unit (C5) is used for receiving a 12V power switch driving signal sent by the processor, and the power supply end of the 12V power switch unit (C5) is connected with a VS-12V power supply; a 12V switch output terminal of the 12V power switch unit (C5) outputs a 12V power switch output signal VS _12V _ CTL; the 12V switch output end of the 12V power switch unit (C5) supplies power to the seat adjusting switch detection unit (1) and the rearview mirror switch detection and awakening unit (8);

the power supply current-limiting decoupling and bypass unit (C1) comprises a current-limiting resistor R62, one end of the current-limiting resistor R62 is used as a power supply input end of the power supply circuit (C), the other end of the current-limiting resistor R62 is grounded through a polar capacitor C27, and the other end of the resistor R62 is grounded through a capacitor C28 and a capacitor C29 which are connected in series in sequence;

the low dropout voltage regulator unit (C2) comprises a low dropout voltage regulator IC5, the type is: the BD450M2FP3-CE2, the input end of the low dropout regulator IC5 is connected with the other end of the current-limiting resistor R62, and the output end of the low dropout regulator IC5 is connected with the power supply decoupling unit (C3);

the power supply decoupling unit (C3) comprises a capacitor C30 and a resistor R63, one end of the capacitor C30 is connected with one end of the resistor R63, the other end of the capacitor C30 is grounded, the common end of the capacitor C30 and the resistor R63 is connected with the output end of the low dropout regulator IC5, the other end of the resistor R63 is connected with the 5V power supply switch unit (C4), and the other end of the resistor R63 and the common end of the 5V power supply switch unit (C4) are also used as the first 5V power supply output end of the power supply circuit (C); the first 5V power output end of the power supply circuit (C) is used for supplying power to the power supply circuit (12) of the rearview mirror motor position sensor;

the 5V power switch unit (C4) comprises a P-channel enhancement type MOS field effect transistor Q13, a source S of the P-channel enhancement type MOS field effect transistor Q13 is connected with the other end of the resistor R63, the source S of the field effect transistor Q13 is connected with a grid G of the field effect transistor Q13 through a resistor R92 and a capacitor C63 which are connected in parallel, the grid G of the field effect transistor Q13 is used as a power supply enabling end of the power circuit (C), and a drain electrode of the field effect transistor Q13 is used as a second 5V power supply output end VCC5V _2 of the power circuit (C);

and a second 5V power output end VCC5V _2 of the power supply circuit (C) is used for supplying power to the rearview mirror direction adjusting motor driving unit (9) and the motor working current detection unit (7).