CN214985078U - Vehicle door integrated safety device based on STC89C52RC single-chip microcomputer - Google Patents
Vehicle door integrated safety device based on STC89C52RC single-chip microcomputer Download PDFInfo
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- CN214985078U CN214985078U CN202120694484.XU CN202120694484U CN214985078U CN 214985078 U CN214985078 U CN 214985078U CN 202120694484 U CN202120694484 U CN 202120694484U CN 214985078 U CN214985078 U CN 214985078U
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Abstract
The utility model discloses a vehicle door comprehensive safety device based on an STC89C52RC single chip microcomputer, which comprises an infrared induction module, the infrared induction module is electrically connected with the STC89C52RC single chip microcomputer, the STC89C52RC single chip microcomputer is electrically connected with the HC-SR04 radar speed measurement module, the infrared distance measurement module, the emergency device, the wireless remote control device and the 315M wireless receiving device respectively, the utility model has simple structure, if the infrared induction module senses the action of opening the vehicle door, the STC89C52RC single chip microcomputer starts the HC-SR04 speed measurement module and the infrared distance measurement module to work, the HC-SR04 speed measurement module detects whether an object exceeding the dangerous speed is close to the vehicle door or not, the infrared distance measurement module detects that a static object blocks in the opening range of the vehicle door, when an object exceeding the dangerous speed approaches the car door or a static object is blocked in the door opening range, the central control lock is locked, and an alarm is given out through the buzzer.
Description
Technical Field
The utility model relates to a door safety device technical field especially relates to a safety device is synthesized to door based on STC89C52RC singlechip.
Background
The 'getting-off' seems to be a simple matter, but a safe underground vehicle needs many steps, firstly, the traffic flow situation behind the vehicle is observed before the vehicle is driven, then, after the safety is confirmed, the vehicle door is opened by a hand close to the central control side of the vehicle, pedestrians or non-motor vehicles behind are observed, finally, the safety is confirmed again, the vehicle door is opened, the vehicle is rapidly driven off and closed, meanwhile, the situation of the rear driven vehicle needs to be noticed, in reality, the multiple steps are often ignored, the vehicle door is directly opened to drive off, the door driving accidents are frequently caused, casualties and unnecessary vehicle damage are caused, along with the increase of the number of the motor vehicles and the rapid development of cities, the road conditions of the cities are more and more complicated, the roads are crowded, the door driving accidents are more and more frequently caused, related reports are more and more, and besides that the vehicle or the vehicle door can be driven by the pedestrians behind is confirmed before the vehicle is driven by the vehicle door before the vehicle is driven by the vehicle front vehicle is driven by the traffic regulation on the cities, there are no other reliable solutions, there are almost no relevant research reports at home and abroad through inquiry, there are only a few relevant inventions, and the door opening warning system is being developed for the domestic and domestic Chery cars, but the function is single, and it can only play a certain degree of reminding function for the passengers in the car, and can not completely avoid the door opening accident.
In summary, the existing research can not completely avoid the occurrence of door opening accidents on the premise of ensuring the comfort and safe operation of passengers in the vehicle, or the system is too complex, does not meet the requirements of actual traffic scenes or is inconvenient to maintain, lacks application space, meets the transformation surge of the automobile industry, and the safety gradually becomes the factor of primary consideration of consumers, so vehicle enterprises are 'good for the best of the people', the research field of vehicle active and passive safety design has much space, so the requirements of passenger operation habits, emergency treatment, traffic participants protection and the like in the vehicle are comprehensively considered, and the vehicle door comprehensive safety device based on related development software and hardware of a single chip microcomputer has the advantages of active protection, strong safety, function modularization, strong maintenance and upgrading flexibility, simple structure and low cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a vehicle door integrated safety device based on a STC89C52RC single chip microcomputer.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the vehicle door comprehensive safety device based on the STC89C52RC single chip microcomputer comprises an infrared induction module, wherein the infrared induction module is electrically connected with the STC89C52RC single chip microcomputer, the STC89C52RC single chip microcomputer is electrically connected with an HC-SR04 radar speed measurement module, an infrared distance measurement module, an emergency device, a wireless remote control device and a 315M wireless receiving device respectively, and the 315M wireless receiving device is electrically connected with a buzzer and a central controller respectively.
Preferably, the infrared distance measuring module comprises a pair of infrared transmitting and receiving tubes installed outside the vehicle, the transmitting tube transmits infrared signals with specific frequency, the receiving tube receives the infrared signals with the frequency, when the infrared detection direction meets an obstacle, the infrared signal is reflected back to be received by the receiving tube and is processed, the infrared return signal can be used by the MCU to identify the change of the surrounding environment, the emission frequency of the MCU is about 38kHz generally, the detection distance is short generally, the MCU is used for identifying the short-distance obstacle target, because infrared sensor mainly used survey the near barrier of distance door and handle department response people hand contact among this door safety integrated device, the working distance is shorter, and it is higher to adopt infrared sensor as range finding module precision, and action and alarm signal's reaction is fast.
Preferably, the STC89C52RC single chip microcomputer is a low-power-consumption and high-performance CMOS 8-bit microcontroller produced by STC company, and is provided with an 8K-byte system programmable Flash memory, a 4K-byte EEPROM memory space is arranged in the single chip microcomputer, and the single chip microcomputer can be directly downloaded by using a serial port.
Preferably, the HC-SR04 radar ranging module adopts IO to trigger ranging and can be directly connected with the MCU through an IO port, the HC-SR04 radar ranging module is widely applied to the aspect of realizing ranging and speed measurement of the single chip microcomputer, can provide a non-contact distance sensing function of 2cm-400cm, has the ranging precision of up to 3mm, and has the characteristics of stable performance and accurate measured distance.
Preferably, the infrared sensing module comprises an infrared sensor and a sensing lamp which are installed at the door handle, the device mainly recognizes the door opening action of people, and by utilizing the characteristic of high sensitivity of the infrared sensor, as long as a handle extends into the groove of the door handle, the handle can touch the infrared device installed in the groove, and the device can output a level signal to the distance measuring module to enable the distance measuring module to work.
Preferably, the emergency device comprises an emergency button arranged in the vehicle, and the wireless remote control device comprises a wireless remote controller.
Compared with the prior art, the beneficial effects of the utility model are that: the system works by switching on a power supply, the indicator light is not on when the infrared sensor does not sense the blockage of an object, when a finger is inserted into a groove of the door handle to be opened, the indicator light is on when the infrared sensor senses the blockage of the object, the STC89C52RC single chip microcomputer is triggered to start the HC-SR04 speed measurement module and the infrared distance measurement module to work, the HC-SR04 speed measurement module sends out two times of signal test distances in a short time, two continuous signals are transmitted to the STC89C52RC single chip microcomputer to perform data processing calculation, when an object exceeding the dangerous speed is detected to be close to the door, the STC89C52RC single chip microcomputer transmits a signal to the 315M wireless receiving device to control the central lock to be locked, and an alarm is sent out through the buzzer. When the infrared ranging module detects that a static object blocks in the door opening range of the vehicle door, the STC89C52RC single chip microcomputer transmits a signal to the 315M wireless receiving device to control the central control lock to be locked, an alarm is given out through the buzzer, and comprehensive safety system control coverage is realized through detection of objects behind and around the vehicle.
The utility model discloses simple structure, infrared induction module is if the response has the action of opening the door, STC89C52RC singlechip then starts HC-SR04 module and the work of infrared distance measuring module, HC-SR04 module detects whether there is the object that exceeds the dangerous velocity to be close to the door, infrared distance measuring module then detects the door and opens the door and has static object to block in the scope, when exceeding the dangerous velocity object and being close to the door or opening the door and having static object to block, well accuse lock locking to send out the police dispatch newspaper through bee calling organ.
Drawings
Fig. 1 is a system block diagram of a vehicle door integrated safety device based on an STC89C52RC single chip microcomputer provided by the present invention;
fig. 2 is a timing diagram of a distance measuring signal of the vehicle door integrated safety device based on the STC89C52RC single chip microcomputer provided by the utility model;
fig. 3 is a main circuit of the vehicle door integrated safety device STC89C52RC single chip microcomputer based on the STC89C52RC single chip microcomputer provided by the utility model;
fig. 4 is a circuit diagram of an external infrared sensor of the vehicle door integrated safety device based on the STC89C52RC single chip microcomputer provided by the utility model;
fig. 5 is a circuit diagram of the infrared sensor at the handle of the vehicle door integrated safety device based on the STC89C52RC single chip microcomputer of the present invention;
fig. 6 is an external circuit diagram of an ultrasonic velocity measurement module of a vehicle door integrated safety device based on an STC89C52RC single chip microcomputer provided by the utility model;
fig. 7 is a structure diagram of an ultrasonic ranging internal circuit of the car door integrated safety device based on the STC89C52RC single chip microcomputer;
fig. 8 is the utility model provides an outside schematic diagram of safety device 315M wireless receiving arrangement is synthesized to door based on STC89C52RC singlechip.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Example one
Referring to fig. 1-8, a door integrated safety device based on an STC89C52RC singlechip includes an infrared sensing module, the infrared sensing module is electrically connected with an STC89C52RC singlechip, the STC89C52RC singlechip is respectively electrically connected with an HC-SR04 radar speed measuring module, an infrared distance measuring module, an emergency device, a wireless remote control device and a 315M wireless receiving device, and the 315M wireless receiving device is respectively electrically connected with a buzzer and a central controller.
Example two
The embodiment is improved on the basis of the first embodiment: the infrared distance measuring module comprises a pair of infrared transmitting and receiving tubes arranged outside the automobile, the STC89C52RC single chip microcomputer is a low-power-consumption and high-performance CMOS 8-bit microcontroller produced by STC company, the microcontroller is provided with an 8K byte system programmable Flash memory, a 4K byte EEPROM storage space is arranged in the microcontroller, the microcontroller can be downloaded by directly using a serial port, the HC-SR04 radar distance measuring module adopts IO to trigger distance measurement and can be directly connected with an MCU through an IO port, the infrared sensing module comprises an infrared sensor and an induction lamp arranged at a door handle, the emergency device comprises an emergency button arranged in the automobile, and the wireless remote control device comprises a wireless remote controller, the utility model has the advantages of simple structure, when the infrared sensing module senses the action of opening the automobile door, the STC89C52RC single chip microcomputer starts the HC-SR04 speed measuring module and the infrared distance measuring module, and the HC-SR04 speed measuring module detects whether an object exceeding the dangerous speed approaches the automobile door, the infrared distance measurement module detects that a static object blocks in the door opening range of the vehicle door, and the central control lock is locked when the object exceeding the dangerous speed is close to the vehicle door or the static object blocks in the door opening range, and gives an alarm through the buzzer.
The STC89C52RC single-chip microcomputer mainly comprises the following components:
(1) mains power supply pin (2): VCC (Pin 40): power input, +5V power, GND (Pin 20): grounding wire
(2) External crystal oscillator pin (2):
XTAL1(Pin 19): and the input end of the on-chip oscillating circuit.
XTAL2(Pin 20): and the output end of the on-chip oscillating circuit.
(3) Control pins (4):
RST/VPP (Pin 9): and the pin is reset, and the high level of 2 machine periods appears on the pin to reset the single chip microcomputer.
ALE/PROG (Pin 30): the address latch enable signal.
PSEN (Pin 29): an external memory read strobe signal.
EA/VPP (Pin 31): the internal and external gating of the program memory reads the instruction from the external program memory in response to the low level, and reads the instruction from the internal program memory in response to the high level.
(4) Programmable input/output pins (32):
the STC89C52 single chip microcomputer has 4 groups of 8-bit programmable I/O ports, which are respectively a P0 port, a P1 port, a P2 port and a P3 port, and each port has 8 bits (8 pins) and totally 32 ports.
PO port (Pin 39-Pin 32): 8-bit bidirectional I/O port line, named P0.0-P0.7P1 port (Pin 1-Pin 8): 8-level bidirectional I/O port lines named P1.0-P1.7P 2 ports (Pin 21-Pin 28): 8-level bidirectional I/O port lines named P2.0-P2.7P 3 ports (Pin 10-Pin 17): 8-level bidirectional I/O port lines, named P3.0-P3.7.
An infrared sensor circuit:
E18-D80NK-N is a photoelectric sensor integrating emission and reception, emitted light is emitted after modulation, and reflected light is demodulated and output by a receiving head. The interference of visible light is effectively avoided. The use of the lens also makes the sensor detect the problem of 80 cm distance at the farthest (due to the characteristics of infrared light, objects with different colors have different maximum distances to be detected; white objects are the farthest, and black objects are the nearest). The distance for detecting the obstacle can be adjusted by a potentiometer knob at the tail part according to requirements.
The infrared sensor at the handlebar is mainly used for sensing whether a human hand is in contact with the handlebar to touch the MCU for working.
Ultrasonic speed measurement module circuit:
the ultrasonic speed measuring module is connected with P11 and P12 interfaces of the single chip microcomputer.
The HC-SR04 ultrasonic ranging module can provide a non-contact distance sensing function of 2cm-400cm, and the ranging precision can reach 3 mm; the module comprises an ultrasonic transmitter, a receiver and a control circuit. The ultrasonic wave is transmitted and received by a 555 timer.
315M wireless receiving device circuitry:
the working frequency of the data transmitting module is 315M, the SAW frequency stabilization is adopted, the frequency stability is extremely high, and when the ambient temperature is changed between-25 and +85 ℃, the frequency drift is only 3 ppm/degree. It is especially suitable for multiple-sending and one-receiving wireless remote control and data transmission system. The frequency stability of the acoustic surface resonator is second to that of a crystal, the frequency stability and consistency of a common LC oscillator are poor, and even if a high-quality fine tuning capacitor is adopted, the temperature difference change and vibration are difficult to ensure that the tuned frequency point cannot deviate.
The data module is modulated in an ASK mode to reduce power consumption, when a data signal stops, the transmitting current is reduced to zero, the data signal and the input end of the transmitting module can be connected through a resistor or directly and cannot be coupled through a capacitor, otherwise, the transmitting module cannot work normally. The data level should be close to the actual operating voltage of the data module to achieve a high modulation effect.
To avoid being affected by the distribution parameters, the emitting module should be vertically installed on the edge of the main board and be more than 5mm away from the surrounding devices. The transmission distance of the module is related to the frequency and amplitude of the modulated signal, the transmission voltage and the battery capacity, the sensitivity of the transmitting antenna and the receiver and the transceiving environment. Generally, the maximum transmission distance in an open area is about 800 meters, and in case of obstacles, the distance is shortened, and different transceiving environments have different transceiving distances because refraction and reflection in the radio signal transmission process can form dead zones and unstable zones.
The working principle is as follows: the system works by switching on a power supply, the indicator light is not lighted when the infrared sensor does not sense the blockage of an object, when a finger is inserted into a groove of the door handle to prepare for opening the door, the infrared sensor senses the blockage of the object and then the indicator light is lighted in red, the STC89C52RC single chip microcomputer is triggered to start the HC-SR04 speed measurement module and the infrared distance measurement module to work, the HC-SR04 speed measurement module sends out two signal test distances in a short time, two continuous signals are transmitted to the STC89C52RC single chip microcomputer to carry out data processing calculation, when an object exceeding the dangerous speed is detected to approach the door, the STC89C52RC single chip microcomputer transmits a signal to the 315M wireless receiving device control central lock for locking and sends out an alarm through the buzzer, when the infrared distance measurement module detects that a static object is blocked in the door opening range, the STC89C52RC single chip microcomputer also transmits a signal to the 315M wireless receiving device control central lock for locking and sends out an alarm through the buzzer, the detection of objects at the rear and left and right of the vehicle realizes relatively comprehensive control coverage of the safety system, when people meet some conditions and need to open the door emergently, an emergency mode is opened by pressing an emergency button, the central control lock is unlocked, passengers can normally open the vehicle door, and when the safety device which needs to be remotely and flexibly controlled is opened and closed, the mode of the safety device and the locking state of the central control lock of the vehicle door can be controlled through a remote controller.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. The comprehensive vehicle door safety device based on the STC89C52RC single-chip microcomputer comprises an infrared induction module and is characterized in that the infrared induction module is electrically connected with an STC89C52RC single-chip microcomputer, the STC89C52RC single-chip microcomputer is electrically connected with an HC-SR04 radar speed measurement module, an infrared distance measurement module, an emergency device, a wireless remote control device and a 315M wireless receiving device respectively, and the 315M wireless receiving device is electrically connected with a buzzer and a central controller respectively.
2. The integrated vehicle door safety device based on the STC89C52RC single-chip microcomputer according to claim 1, wherein the infrared distance measuring module comprises a pair of infrared transmitting and receiving tubes installed outside the vehicle.
3. The vehicle door integrated safety device based on the STC89C52RC singlechip microcomputer according to claim 1, wherein the STC89C52RC singlechip microcomputer is a low power consumption and high performance CMOS8 bit microcontroller with 8 Kbyte system programmable Flash storage.
4. The vehicle door integrated safety device based on the STC89C52RC single-chip microcomputer according to claim 1, wherein the HC-SR04 radar ranging module adopts IO triggering ranging and can be directly connected with the MCU through an IO port.
5. The integrated door safety device according to claim 1, wherein the infrared sensor module comprises an infrared sensor and a sensor lamp mounted at the door handle.
6. The integrated vehicle door safety device based on the STC89C52RC single chip microcomputer according to claim 1, wherein the emergency device comprises an emergency button disposed in the vehicle, and the wireless remote control device comprises a wireless remote controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120694484.XU CN214985078U (en) | 2021-04-06 | 2021-04-06 | Vehicle door integrated safety device based on STC89C52RC single-chip microcomputer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120694484.XU CN214985078U (en) | 2021-04-06 | 2021-04-06 | Vehicle door integrated safety device based on STC89C52RC single-chip microcomputer |
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| Publication Number | Publication Date |
|---|---|
| CN214985078U true CN214985078U (en) | 2021-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120694484.XU Expired - Fee Related CN214985078U (en) | 2021-04-06 | 2021-04-06 | Vehicle door integrated safety device based on STC89C52RC single-chip microcomputer |
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| Country | Link |
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| CN (1) | CN214985078U (en) |
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2021
- 2021-04-06 CN CN202120694484.XU patent/CN214985078U/en not_active Expired - Fee Related
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