CN104986143A - Anti-theft alarm device for automobile fuel oil - Google Patents

Abstract

The invention discloses an automobile fuel anti-theft alarm device. The device includes a main control circuit and a wireless signal receiving circuit. The main control circuit includes a single chip microcomputer, a distance sensor, a first relay, a second relay, a third relay, a fourth A relay, a warning light and a wireless transmitting module, the wireless signal receiving circuit includes a wireless receiving module, a fifth relay and a buzzer. The present invention compares the signal of the distance sensor at the current moment with the preset value of the system, turns on or off the fuel anti-theft alarm device, can issue an alarm in time when the fuel is stolen, and prevents accidents caused by passing pedestrians or vehicles. The occurrence of false alarm action improves the timeliness and reliability of fuel oil anti-theft.

Description

An automobile fuel anti-theft alarm device

technical field

The present invention relates to the field of electronic technology, and more specifically relates to an automobile fuel anti-theft alarm device.

Background information

Since the Industrial Revolution, when the steam engine and the internal combustion engine were invented, especially after humans have improved the internal combustion engine into today’s engine and been widely used in automobiles, automobiles have increasingly become the most important means of transportation for contemporary people. According to incomplete statistics, the current human More than 90% of the transportation of people and materials is done by automobiles. With the development of society, more and more automobiles are owned. In recent years, there have been energy crises of varying degrees in the world. Prices have also soared; incidents of car fuel theft have also increased day by day.

Car transportation is generally long-distance, and the driver will inevitably stop to rest during a transportation process; the fuel storage capacity of the fuel tank of long-distance trucks is generally very large, which makes the fuel of trucks the first choice for fuel theft, especially in the When the driver stops to eat and rest; if the fuel oil of the car is stolen, it will not only cause serious economic losses to the driver, but also bring huge mental pressure to the driver due to the existence of the risk of fuel theft. Therefore, the anti-theft of fuel oil of trucks has also become an important social problem.

Existing fuel anti-theft technologies are mainly divided into three categories.

The first type of anti-theft device is to determine whether the fuel is stolen by detecting the abnormal change of the fuel pressure in the fuel tank, and trigger the alarm module after the fuel is determined to be stolen; the disadvantage of this type of fuel alarm system is that the alarm has a hysteresis When the driver finds out and calls the police, the thieves have already stolen the fuel before they come forward to stop them; driver's life safety.

The second type of anti-theft device is mechanical anti-theft, such as adding an anti-theft net inside the fuel tank, using more complicated anti-theft locks, etc. The shortcoming of this type of anti-theft device is that when the driver is sleeping soundly in the car or eating at a distance, the thief is easy to forcibly open the fuel tank to carry out the theft.

The third type of anti-theft device uses infrared, ultrasonic principles or vibration detection devices to detect whether someone is close to the fuel tank, and an alarm will be triggered when someone is close to the fuel tank. The disadvantage of this type of anti-theft device is that it cannot distinguish between people passing by the fuel tank and thieves. It is also difficult for the vibration detection device to accurately distinguish the vibration caused by the passing of the vehicle and the vibration caused by the thief forcibly opening the fuel tank; it is very prone to false alarms. Phenomenon.

Contents of the invention

In order to solve the above problems, the present invention provides an automobile fuel anti-theft alarm device based on wireless communication and a distance sensor, so as to solve the problems of untimely alarm, high probability of false alarm and low alarm range that often occur in the fuel anti-theft detection and control method in the prior art. Small, low reliability and other issues.

The technical scheme adopted in the present invention is: an automobile fuel anti-theft alarm device, comprising a main control circuit and a wireless signal receiving circuit, the main control circuit comprising a single-chip microcomputer, a distance sensor, a first relay, a second relay, a third relay, The fourth relay, the warning lamp and the wireless transmitting module, the first relay is connected with the automobile power supply, the first relay is connected with the first signal input terminal of the single-chip microcomputer, and the warning lamp and the wireless transmitting module are respectively connected with the third relay and the fourth relay, The third relay and the fourth relay are respectively connected to the second signal output end, the first signal output end of the single-chip microcomputer is connected to the second relay, and the distance sensor is respectively connected to the second relay and the second signal input end of the single-chip microcomputer; The wireless signal receiving circuit includes a wireless receiving module, a fifth relay and a buzzer, wherein the wireless receiving module, the fifth relay and the buzzer are connected in sequence.

The beneficial effects produced by the present invention are: compared with various existing fuel anti-theft devices, the present invention compares the signal of the distance sensor at the current moment with the preset value of the system, if the signal of the distance sensor at the current moment is greater than the preset value Or there is no signal, the sound and light alarm and wireless remote alarm will be carried out through the alarm unit and the wireless communication unit, and when the car key is in the open state again, the whole alarm system will be automatically closed; The alarm is issued in time, and the occurrence of false alarm actions caused by passing pedestrians or vehicles is prevented, and the timeliness and reliability of fuel oil anti-theft are improved.

Description of drawings

Fig. 1 is the structural representation of main control circuit among the present invention;

Fig. 2 is a schematic structural diagram of a wireless signal receiving circuit in the present invention;

FIG. 3 is a schematic diagram of the installation of the distance sensor in this embodiment.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Fig. 1 and Fig. 2, the present invention is a kind of alarm device for anti-theft of automobile fuel oil, and this device comprises main control circuit part and wireless signal receiving circuit two parts, and wherein, main control circuit comprises single-chip microcomputer 1, distance sensor 2. The first relay 5, the second relay 6, the third relay 7, the fourth relay 8, the alarm lamp 3 and the wireless transmitting module 4. The main control circuit relies on the car power supply for power supply, and detects the on-off state of the car key switch through the first relay 5. When the key switch is not disconnected from the power supply and the car is in working condition, the first relay 5 is in the off state; the key is removed When the power supply is disconnected and the vehicle stops, the alarm device starts to work. The automobile power supply outputting 12V voltage is connected with the first relay 5, the first relay 5 is connected with the single-chip microcomputer 1, the single-chip microcomputer 1 is connected with the second relay 6, and the distance sensor 2 is connected with the second relay 6 and the single-chip microcomputer 1 respectively, and the single-chip microcomputer 1 is also connected respectively. The third relay 7 and the fourth relay 8 are connected, the third relay 7 is connected to the alarm light 3 , and the fourth relay 8 is connected to the wireless transmitting module 4 . Wherein, the second relay 6, the third relay 7 and the fourth relay 8 are all in a normally open state.

The wireless signal receiving circuit includes a wireless receiving module 9, a fifth relay 10 and a buzzer 11, the wireless receiving module 9, the fifth relay 10 and the buzzer 11 are connected in sequence, and the fifth relay 10 is in a normally open state.

When the fuel anti-theft alarm device is turned on, the MCU 1 will obtain the signal of the distance sensor 2 at the current moment and compare it with the system preset value. If the distance sensor 2 obtained at the current moment is greater than the system preset value or the distance sensor 2 has no signal, the MCU will 1 to issue an alarm indication. After the warning indication is issued, the warning light 3 and the wireless transmitting module 4 will be activated, and the wireless receiving module 9 will send the received signal to the buzzer 11 through the fifth relay 10, thereby making the buzzer 11 work to remind the driver.

The following is an embodiment of the present invention:

As shown in FIG. 3 , the distance sensor 2 in the present invention is fixed on the support 13 through the nut 12 , and the support 13 is arranged next to the fuel tank nozzle 15 through the cable tie 16 , and the fuel tank nozzle cover 14 is arranged outside the fuel tank nozzle 15 . The distance sensor 2 is installed next to the fuel tank nozzle 15 for collecting the distance signal between the fuel tank nozzle cover 14 and the distance sensor 2 in real time.

What needs to be explained here is that the reason why the distance sensor 2 signal is greater than the system preset value or the distance sensor 2 has no signal must be that the fuel tank nozzle cover 14 is removed or the signal line is damaged, so it must be caused by theft by the thief, so The invention can well avoid the alarm delay phenomenon and false alarm situation produced by other alarms, and improves the reliability of the fuel anti-theft alarm.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to this embodiment will be readily apparent to those skilled in the art, and the principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Accordingly, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (1)

1. a vehicle fuel antitheft alarm system, it is characterized in that: comprise governor circuit and wireless signal receiving circuit, described governor circuit comprises micro controller system, rang sensor, first relay, second relay, 3rd relay, 4th relay, alarm lamp and wireless transmitter module, the first described relay is connected with automobile power source, first relay connects the first signal input part of micro controller system, alarm lamp and wireless transmitter module are connected the 3rd relay and the 4th relay respectively, the 3rd described relay is connected with secondary signal mouth respectively with the 4th relay, first signal output part of micro controller system connects the second relay, described rang sensor connects the secondary signal input end of the second relay and micro controller system respectively, described wireless signal receiving circuit comprises wireless receiving module, the 5th relay and buzzer phone, and wherein wireless receiving module, the 5th relay are connected successively with buzzer phone.