CN210970854U

CN210970854U - Vehicle-mounted reversing early warning circuit based on single chip microcomputer

Info

Publication number: CN210970854U
Application number: CN201921937855.1U
Authority: CN
Inventors: 郭旭洋
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2020-07-10
Anticipated expiration: 2029-11-12

Abstract

The utility model discloses a vehicle-mounted reversing early warning circuit based on a single chip microcomputer, including single chip microcomputer IC1, power supply circuit, display circuit, acquisition circuit, indicating circuit and buzzer circuit, power supply circuit's power source P7 electric connection is in vehicle-mounted power supply delivery outlet, and single chip microcomputer IC1, display circuit, acquisition circuit, indicating circuit and buzzer circuit are connected to power supply circuit for single chip microcomputer IC1, display circuit, acquisition circuit, indicating circuit and buzzer circuit; the utility model discloses guaranteeing under the lower cost condition, having realized the visual distance indication when backing a car, monitoring temperature information simultaneously to visual demonstration guarantees lower cost, has improved visual degree, has good market using value.

Description

Vehicle-mounted reversing early warning circuit based on single chip microcomputer

Technical Field

The utility model relates to an on-vehicle early warning circuit field especially relates to an on-vehicle early warning circuit that backs a car based on singlechip.

Background

With the increasing popularity of automobiles year by year, consumers have made more demands on the arrangement of automobiles while using automobiles as transportation vehicles, and especially have made higher demands on safety. For many drivers, especially novices, backing is certainly very painful, and the backing radar can help the driver to solve the problem.

The existing vehicle-mounted reversing radar only grasps the distance behind the vehicle when reversing according to the frequency of sound, but for a novice driver, the distance behind the vehicle is still difficult to recognize only through the frequency of sound, while the existing video reversing device can observe the situation behind the vehicle, the novice driver still grasps the distance behind the vehicle, and the video reversing device is expensive in manufacturing cost and tens of millions of people.

The prior art has defects and needs to be improved.

SUMMERY OF THE UTILITY MODEL

In order to solve the defect that prior art exists, the utility model provides a vehicle-mounted early warning circuit that backs a car based on singlechip.

The utility model provides a technical document, a vehicle-mounted reversing early warning circuit based on singlechip, including singlechip IC1, power supply circuit, display circuit, acquisition circuit, indicating circuit and buzzer circuit, power supply circuit's power source P7 electric connection is in vehicle-mounted power delivery outlet, the output electric connection singlechip IC1 of power supply circuit, display circuit, acquisition circuit, indicating circuit and buzzer circuit, for singlechip IC1, display circuit, acquisition circuit, indicating circuit and buzzer circuit power supply, display circuit, acquisition circuit, indicating circuit and buzzer circuit all with singlechip IC1 electric connection, acquisition circuit gathers distance information and temperature information transmission to singlechip IC1 and handles, shows through display circuit and indicating circuit to early warning is carried out through buzzer circuit, acquisition circuit includes distance acquisition circuit and temperature acquisition circuit, the distance acquisition circuit and the temperature acquisition circuit are both electrically connected with the singlechip IC 1.

Preferably, the power supply circuit includes a power supply interface P7, a filter capacitor and a buck chip U2, the power supply interface P7 is electrically connected to an output port of the vehicle-mounted power supply, filter capacitors C7 and C7 are disposed between

pins

1 and 2 of the power supply interface P7 for filtering, pin 2 of the power supply interface P7 is electrically connected to pin 3 of the buck chip U7, pin 3 and pin 5 of the buck chip U7 are electrically connected through a resistor R7, pin 6 of the buck chip U7 and pin 2 of the buck chip U7 are electrically connected through a capacitor C7, pin 2 of the buck chip U7 is electrically connected to one end of the inductor 7, the other end of the inductor 7 is grounded through a parallel capacitor C7 and a capacitor C7, the other end of the inductor 7 is grounded through series resistors R7 and R7, the middle ends of the series resistors R7 and R7 are electrically connected to the pin 4 of the buck chip U7, the buck chip U7 and the buck chip U7 is connected to the buck chip V7 and the buck chip.

Preferably, the power circuit is further provided with an indication unit, the indication unit comprises a light emitting diode D1 and a resistor R1, the 5V power supply is electrically connected with the anode of the light emitting diode D1, the cathode of the light emitting diode D1 is grounded through the resistor R1, and the indication unit is used for indicating whether the power circuit supplies power.

Preferably, the display circuit comprises a resistor P2, a potentiometer R3 and a display screen L CD1, wherein a common pin 1 of the resistor P2 is electrically connected with a 5V power supply, pins 2-9 of the resistor P2 are electrically connected with pins P00-P07 of a singlechip IC1 in sequence, the potentiometer R3 is connected in a 5V circuit loop in series, a tap of the potentiometer R3 is electrically connected with a pin 3 of the display screen L CD1 and used for adjusting the brightness of the display screen L CD1, a pin 1 of the display screen L CD1 is grounded, a pin 2 of the display screen L CD1 is connected with the 5V power supply, pins 4-6 of the display screen L CD1 are respectively connected with a pin P25-P27 of the singlechip IC1, pins 7-14 of the display screen L CD1 are respectively connected with a pin P00-P07 of the singlechip IC1, a pin 3615 of the display screen L is connected with a pin P L of the singlechip IC L, and the pin 7-P L of the display screen L is connected with a pin L.

Preferably, the distance acquisition circuit comprises an ultrasonic interface P4 and an ultrasonic sensor, the ultrasonic interface P4 is electrically connected with the ultrasonic sensor,

pins

2 and 3 of the ultrasonic interface P4 are electrically connected with pins P22 and P23 of the single chip microcomputer IC1, pin 1 of the ultrasonic interface P4 is connected with a 5V power supply, and pin 4 of the ultrasonic interface P4 is grounded.

Preferably, the temperature acquisition circuit comprises a temperature interface P3, a temperature sensor and a resistor R5, wherein a pin 1 of the temperature interface P3 is grounded, a pin 2 of the temperature interface P3 is connected with a pin P23 of the singlechip IC1, a pin 3 of the temperature interface P3 is connected with a 5V power supply, and a pin 2 and a pin 3 of the temperature interface P3 are connected with the resistor R5.

Preferably, the indication circuit comprises a bank P6, light emitting diodes D2-D9 and a shift register U1, wherein a common pin 1 of the bank P6 is connected with a 5V power supply, pins 2-9 of the bank P6 are electrically connected with pins 15 and 1-7 of the shift register U1 through positive connection light emitting diodes D2-D9 respectively,

pins

8 and 13 of the shift register U1 are grounded,

pins

10 and 16 of the shift register U1 are connected with the 5V power supply, and

pins

11, 12 and 14 of the shift register U1 are connected with pins P14, P13 and P12 of the singlechip IC1 respectively.

Preferably, the buzzer circuit comprises a buzzer B1, a triode P5 and a resistor R6, a P20 pin of the singlechip IC1 is electrically connected with a base electrode of a triode P5 through a resistor R6, a collector electrode of the triode P5 is grounded, an emitter electrode is connected with a negative electrode of the buzzer B1, and a positive electrode of the buzzer B1 is connected with a 5V power supply.

Compared with the prior art, the automobile reversing distance monitoring device has the advantages that the distance acquisition circuit and the buzzer circuit are arranged, the automobile reversing distance monitoring device is practical in monitoring the reversing distance, the ringing frequency of the buzzer circuit is defined, the distance between an automobile and an obstacle is indicated through the number of the luminous L ED lamps in the reversing process by adding the indicating circuit, the visual distance indication during reversing is increased under the condition that excessive cost is not increased, the temperature monitoring function is increased by arranging the temperature acquisition circuit and the display circuit, the monitoring and the display of the temperature outside the automobile or the temperature inside the automobile are realized, the diversity of products is increased, and the working condition of the power circuit is indicated by arranging the indicating unit.

Drawings

FIG. 1 is a schematic view of the structural connection of the present invention;

fig. 2 is a circuit diagram of the single chip microcomputer IC1, the acquisition circuit and the buzzer circuit;

FIG. 3 is a circuit diagram of the present invention;

FIG. 4 is a power circuit diagram of the present invention;

fig. 5 is an indicating circuit diagram of the present invention.

Detailed Description

It should be noted that the above technical features are continuously combined with each other to form various embodiments which are not listed above, and all the embodiments are regarded as the scope of the present invention described in the specification; moreover, modifications and variations will occur to those skilled in the art in light of the foregoing description, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.

In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "electrically connected" to another element, it can be directly electrically connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The present invention will be described in detail with reference to the accompanying drawings.

As shown in figure 1, the vehicle-mounted reversing early warning circuit based on the single chip microcomputer comprises a single chip microcomputer IC1, a power circuit, a display circuit, a collection circuit, an indication circuit and a buzzer circuit, the power supply interface P7 of the power supply circuit is electrically connected with the vehicle-mounted power supply output port, the output end of the power supply circuit is electrically connected with the singlechip IC1, the display circuit, the acquisition circuit, the indicating circuit and the buzzer circuit to supply power for the singlechip IC1, the display circuit, the acquisition circuit, the indicating circuit and the buzzer circuit, the display circuit, the acquisition circuit, the indicating circuit and the buzzer circuit are all electrically connected with the singlechip IC1, the acquisition circuit acquires distance information and temperature information and transmits the distance information and temperature information to the singlechip IC1 for processing, show through display circuit and indicating circuit to carry out the early warning through buzzer circuit, acquisition circuit includes apart from acquisition circuit and temperature acquisition circuit, apart from acquisition circuit and temperature acquisition circuit all with singlechip IC1 electric connection.

As shown in fig. 4, preferably, the power circuit includes a power interface P7, a filter capacitor and a buck chip U2, the power interface P7 is electrically connected to an output port of a vehicle-mounted power supply, filter capacitors C7 and C7 are disposed between

pins

1 and 2 of the power interface P7 for filtering, pin 2 of the power interface P7 is electrically connected to pin 3 of the buck chip U7,

pins

3 and 5 of the buck chip U7 are electrically connected through a resistor R7, pin 6 of the buck chip U7 and pin 2 of the buck chip U7 are electrically connected through a capacitor C7, pin 2 of the buck chip U7 is electrically connected to one end of the inductor 7, the other end of the inductor 7 is grounded through a parallel capacitor C7 and the capacitor C7, the other end of the inductor 7 is grounded through series resistors R7 and R7, the middle ends of the resistors R7 and R7 are electrically connected to 4 of the buck chip U7, and the buck chip U7, the buck chip U7 and the buck chip V7 are connected to the buck chip.

As shown in fig. 3, preferably, the display circuit includes a bank P2, a potentiometer R3 and a display screen L CD1, a common 1 pin of the bank P2 is electrically connected to a 5V power supply, 2-9 pins of the bank P2 are sequentially electrically connected to P00-P07 pins of the one-chip microcomputer IC1, the potentiometer R3 is connected in series in a 5V circuit, a tap of the potentiometer R3 is electrically connected to 3 pins of the display screen L CD1 for adjusting the brightness of the display screen L0 CD1, 1 pin of the display screen L CD1 is grounded, 2 pin of the display screen L CD1 is connected to the 5V power supply, 4-6 pins of the display screen L CD1 are respectively connected to P25-P27 pins of the one-chip microcomputer IC1, 7-14 pins of the display screen 27 CD 27 are respectively connected to P27-P27 pins of the one-chip microcomputer IC 27, a power supply of the display screen 27 CD 27 is connected to the display screen 27, and a display screen 27 is connected to the display screen 27, for example, the display screen 27 is connected to the CD 27, and the display screen 27 is connected to the CD.

As shown in fig. 2, preferably, the distance acquisition circuit includes an ultrasonic interface P4 and an ultrasonic sensor, the ultrasonic interface P4 is electrically connected to the ultrasonic sensor,

pins

2 and 3 of the ultrasonic interface P4 are electrically connected to pins P22 and P23 of the single chip IC1, pin 1 of the ultrasonic interface P4 is connected to a 5V power supply, and pin 4 of the ultrasonic interface P4 is grounded; for example, the model of the ultrasonic sensor is CA800956-XA 2.

Preferably, the temperature acquisition circuit comprises a temperature interface P3, a temperature sensor and a resistor R5, wherein a 1 pin of the temperature interface P3 is grounded, a2 pin of the temperature interface P3 is connected with a P23 pin of a singlechip IC1, a 3 pin of the temperature interface P3 is connected with a 5V power supply, and a2 pin and a 3 pin of the temperature interface P3 are connected with the resistor R5, for example, the model of the temperature sensor is set to be DS18B02 or M L X90614 ESF.

As shown in FIG. 5, preferably, the indication circuit comprises a bank P6, light emitting diodes D2-D9 and a shift register U1, wherein a common 1 pin of the bank P6 is connected with a 5V power supply, pins 2-9 of the bank P6 are electrically connected with pins 15 and pins 1-7 of the shift register U1 through forward connection light emitting diodes D2-D9,

pins

8 and 13 of the shift register U1 are grounded,

pins

10 and 16 of the shift register U1 are connected with the 5V power supply, and

pins

11, 12 and 14 of the shift register U1 are connected with pins P14, P13 and P12 of a single chip IC1 respectively.

Further, the single chip microcomputer IC1 is further provided with a clock circuit, the clock circuit includes a crystal oscillator X1, capacitors C2 and C3, XTA L2 and XTA L1 of the single chip microcomputer IC1 are electrically connected through the crystal oscillator X1, and two ends of the crystal oscillator X1 are grounded through the capacitors C2 and C3, respectively.

According to the working principle of the automobile anti-theft alarm device, a power interface P7 receives power from an output port of a vehicle-mounted power supply, the power is reduced to 5V from 12V through filtering and voltage reduction operations, a light emitting diode D1 of an indicating unit is used for indicating whether the 5V power supply is in a working state or not, when the 5V power supply normally works, a light emitting diode D1 is lightened, when a circuit is in an open circuit, the light emitting diode is extinguished, the 5V power supply is abnormal in working, a temperature sensor electrically connected with a temperature interface P3 collects the temperature inside or outside of the automobile and transmits the temperature to a singlechip IC1, then the temperature is displayed through a display screen L CD1, when the automobile is processed and reversed, an ultrasonic sensor electrically connected with an ultrasonic product P4 senses distance information and transmits the distance information to an IC1 for processing, the singlechip controls different buzzer to prompt the distance of an obstacle behind the automobile through controlling different buzzer frequency, when the obstacle distance is far, the buzzer frequency is low, when the obstacle distance is close to the automobile and the obstacle distance, the automobile is close to the obstacle distance, the buzzer frequency is gradually increased when the automobile is close to the obstacle distance to the automobile, the automobile is controlled by a register U1 to control LED D2-D9, the LED is controlled by a register U42 to control LED, when the obstacle distance is close to be lightened, the distance, the automobile is reduced, the automobile is reduced by.

The second embodiment is different from the first embodiment in that the single chip microcomputer IC1 is further provided with a reset circuit, the reset circuit comprises a key S5, a capacitor C1 and a resistor R4, the 5V power supply is electrically connected to a reset pin REST of the single chip microcomputer IC1 through the capacitor C1, the 5V power supply is electrically connected to the reset pin REST of the single chip microcomputer IC1 through the key S5, the reset pin REST of the single chip microcomputer IC1 is grounded through the resistor R4, and the single chip microcomputer IC1 is reset by touching the key S5.

The third embodiment is different from the previous embodiments in that the single chip microcomputer IC1 is further provided with a program download interface P1, pins 1 to 4 of the program download interface P1 are connected together and then grounded, a pin 5 of the program download interface P1 is connected to a 5V power supply, a pin 6 of the program download interface P1 is electrically connected to a pin P16 of the single chip microcomputer IC1, a pin 7 of the program download interface P1 is electrically connected to a pin P17 of the single chip microcomputer IC1, a pin 15 of the program download interface P1 is vacant, and a pin 10 of the program download interface P1 is electrically connected to a pin 15 of the single chip microcomputer IC 1.

Claims

1. A vehicle-mounted reversing early warning circuit based on a single chip microcomputer is characterized by comprising a single chip microcomputer IC1, a power supply circuit, a display circuit, a collection circuit, an indicating circuit and a buzzer circuit, wherein a power supply interface P7 of the power supply circuit is electrically connected with a vehicle-mounted power supply output port, the output end of the power supply circuit is electrically connected with the single chip microcomputer IC1, the display circuit, the collection circuit, the indicating circuit and the buzzer circuit to supply power to the single chip microcomputer IC1, the display circuit, the collection circuit, the indicating circuit and the buzzer circuit are all electrically connected with the single chip microcomputer IC1, the collection circuit collects distance information and temperature information and transmits the distance information and the temperature information to the single chip microcomputer IC1 for processing, the distance information and the temperature information are displayed through the display circuit and the indicating circuit, and early warning is carried out through the buzzer circuit, the collection circuit comprises the distance, the distance acquisition circuit and the temperature acquisition circuit are both electrically connected with the singlechip IC 1.

2. The vehicle-mounted reversing early warning circuit based on the single-chip microcomputer according to claim 1, wherein the power supply circuit comprises a power supply interface P7, a filter capacitor and a voltage-reducing chip U2, the power supply interface P7 is electrically connected to an output port of a vehicle-mounted power supply, a filter capacitor C7 and a filter capacitor C7 are arranged between pins 1 and 2 of the power supply interface P7 for filtering, a pin 2 of the power supply interface P7 is electrically connected to a pin 3 of the voltage-reducing chip U7, pins 3 and 5 of the voltage-reducing chip U7 are electrically connected through a resistor R7, a pin 6 of the voltage-reducing chip U7 and a pin 2 of the voltage-reducing chip U7 are electrically connected through a capacitor C7, a pin 2 of the voltage-reducing chip U7 is electrically connected to one end of an inductor 7, the other end of the inductor 7 is grounded through a capacitor C7 and the capacitor C7 in parallel connection, the other end of the inductor 7 is grounded through a series resistor R7 and a resistor R7, the other end of the inductor 7 is electrically connected to the voltage-reducing chip R7, the intermediate end of the capacitor R7 and the voltage-reducing chip R7 is connected to the output circuit of the voltage-reducing chip U7, and the capacitor C7, and the voltage-reducing chip U.

3. The vehicle-mounted reversing early warning circuit based on the single chip microcomputer according to claim 2, wherein the power circuit is further provided with an indicating unit, the indicating unit comprises a light emitting diode D1 and a resistor R1, a 5V power supply is electrically connected with the anode of the light emitting diode D1, the cathode of the light emitting diode D1 is grounded through the resistor R1, and the indicating unit is used for indicating whether the power circuit supplies power or not.

4. The vehicle-mounted reversing early warning circuit based on the single chip microcomputer according to claim 2, characterized in that the display circuit comprises a resistor P, a potentiometer R and a display screen CD, wherein a common 1 pin of the resistor P is electrically connected with a 5V power supply, 2-9 pins of the resistor P are sequentially electrically connected with a P-P pin of the single chip microcomputer IC, the potentiometer R is connected in a 5V circuit loop in series, a tap of the potentiometer R is electrically connected with a 3 pin of the display screen CD and used for adjusting the brightness of the display screen CD, the 1 pin of the display screen CD is grounded, the 2 pin of the display screen CD is connected with the 5V power supply, 4-6 pins of the display screen CD are respectively connected with the P-P pin of the single chip microcomputer IC, 7-14 pins of the display screen CD are respectively connected with the P-P pin of the single chip microcomputer IC, the 15 pin of the display screen CD is connected with the power supply, and 16 pin of the display screen CD is connected.

5. The vehicle-mounted reversing early warning circuit based on the single-chip microcomputer according to claim 2, wherein the distance acquisition circuit comprises an ultrasonic interface P4 and an ultrasonic sensor, the ultrasonic interface P4 is electrically connected with the ultrasonic sensor, pins 2 and 3 of the ultrasonic interface P4 are electrically connected with pins P22 and P23 of the single-chip microcomputer IC1 respectively, pin 1 of the ultrasonic interface P4 is connected with a 5V power supply, and pin 4 of the ultrasonic interface P4 is grounded.

6. The vehicle-mounted reversing early warning circuit based on the single chip microcomputer according to claim 2, wherein the temperature acquisition circuit comprises a temperature interface P3, a temperature sensor and a resistor R5, a pin 1 of the temperature interface P3 is grounded, a pin 2 of the temperature interface P3 is connected with a pin P23 of the single chip microcomputer IC1, a pin 3 of the temperature interface P3 is connected with a 5V power supply, and a resistor R5 is connected between pins 2 and 3 of the temperature interface P3.

7. The vehicle-mounted reversing early warning circuit based on the single chip microcomputer of claim 2 is characterized in that the indicating circuit comprises a resistor P6, light emitting diodes D2-D9 and a shift register U1, a common 1 pin of the resistor P6 is connected with a 5V power supply, pins 2-9 of the resistor P6 are electrically connected with pins 15 and pins 1-7 of the shift register U1 through forward connection of the light emitting diodes D2-D9, pins 8 and 13 of the shift register U1 are grounded, pins 10 and 16 of the shift register U1 are connected with the 5V power supply, and pins 11, 12 and 14 of the shift register U1 are connected with pins P14, P13 and P12 of a single chip microcomputer IC 1.

8. The vehicle-mounted reversing early warning circuit based on the single-chip microcomputer according to claim 2, wherein the buzzer circuit comprises a buzzer B1, a triode P5 and a resistor R6, a P20 pin of the single-chip microcomputer IC1 is electrically connected with a base electrode of a triode P5 through a resistor R6, a collector electrode of the triode P5 is grounded, an emitter electrode of the triode P5 is connected with a negative electrode of the buzzer B1, and a positive electrode of the buzzer B1 is connected with a 5V power supply.