CN202448758U - Anti-overload device of bus - Google Patents

Abstract

The utility model discloses an anti-overloading device for a passenger car, which comprises an engine fuel injection system switch, an infrared sensor installed on one side of the door, and a pressure sensor installed under the door pedal. The conversion module is connected with the single-chip microcomputer, the single-chip microcomputer is also connected with an alarm, and the single-chip microcomputer is also connected with the switch of the engine fuel injection system. When an overload situation occurs, the driver will be prompted, and the oil circuit can be automatically cut off if the overload situation is not resolved. The utility model has the advantages of simple structure, convenient installation and low cost.

Description

An anti-overload device for passenger cars

technical field

The utility model belongs to an auxiliary device for a passenger car, in particular to an anti-overloading device for a passenger car. The device can automatically identify the overloading of a passenger car, give an alarm and cut off the oil circuit.

Background technique

With the development of society, people's living standards are gradually improving, and transportation has also developed rapidly. It also caused traffic accidents. At present, traffic safety cannot be underestimated, especially for commercial vehicles.

Many major traffic accidents have something to do with overloading. At present, similar anti-overloading devices have been reported in the literature, but no related products have been released yet. There are many principles used in them. When the number of passengers reaches the specified number, the door will be closed, but the actual operation process still cannot completely solve the problem of overcrowding. For example, it has been reported in recent times that an overloaded bus rushed into a reservoir, and a kindergarten school bus is limited to 9 people. , 64 people were actually loaded, which eventually led to tragedy. Although there is also a great relationship with the operating vehicle conditions, overloading is one of the direct causes. Therefore, effectively prohibiting overloading has very important significance for reducing the incidence of traffic accidents.

Contents of the invention

In order to avoid the defects or deficiencies in the prior art, the purpose of this utility model is to provide an anti-overload device for passenger cars. Automatically cut off the oil circuit when the overload condition is not released.

In order to achieve the above object, the utility model adopts the following technical solutions to achieve:

An anti-overload device for a passenger car, comprising an engine fuel injection system switch, characterized in that it also includes an infrared sensor installed on one side of the door, and a pressure sensor installed under the door pedal, and the infrared sensor and the pressure sensor are respectively converted by A/D The module is connected with the single-chip microcomputer, and the single-chip microcomputer is also connected with an alarm, and the single-chip computer is also connected with the switch of the fuel injection system of the engine.

Other features of the utility model are:

The single-chip microcomputer adopts MC9S12DG256VPV single-chip microcomputer of Freescale Company.

The infrared sensor adopts the D204B pyroelectric infrared sensor of Shenzhen Haiwang Sensor Device Co., Ltd.

The pressure sensor adopts PLD204E circular plate load cell.

Described alarm is made up of LED light and buzzer.

The anti-overload device for passenger cars of the present utility model has the following advantages:

(1) Simple structure, convenient installation and low cost. The components used are all common components, and no relevant professional knowledge is required, as long as the circuit is connected.

(2) Stable performance and high precision. It only needs to be installed in the power supply line of the vehicle to accurately judge whether the bus is overloaded.

(3) Strong adaptability and pertinence. Not only can it be used in long-distance buses, but it can detect children more precisely, especially for preventing overloading of school buses.

Description of drawings

Fig. 1 is a structural block diagram of the utility model.

Figure 2 is a schematic diagram of the installation of the infrared sensor and the pressure sensor.

Below in conjunction with accompanying drawing and embodiment the utility model is further explained.

Detailed ways

With reference to Fig. 1, present embodiment provides a kind of anti-overloading device of passenger car, comprises engine fuel injection system switch, is characterized in that, also comprises the infrared sensor that is installed on one side of car door, and is installed in the pressure sensor below car door pedal, and infrared sensor The pressure sensor and the pressure sensor are respectively connected to the single-chip microcomputer through the A/D conversion module. The single-chip microcomputer is also connected to an alarm, and the single-chip microcomputer is also connected to the switch of the engine fuel injection system. The single-chip microcomputer is powered by the 5V power supply of the vehicle.

In this embodiment, the single-chip microcomputer adopts the MC9S12DG256VPV single-chip microcomputer of Freescale Corporation of the United States. This single-chip microcomputer is a 16-bit high-speed single-chip microcomputer, which is widely used in the field of automotive electronic control. It has low cost and high performance, and provides various integrated modules and bus interfaces. It can be used flexibly in different systems; the detection module includes an infrared detection unit and a pressure detection unit. There are two infrared sensors, which are installed on one side of the door at different heights, and two pressure sensors, which are respectively installed under the door pedal.

The infrared sensor adopts the pyroelectric infrared sensor D204B, which is a sensor that can detect the infrared rays emitted by the human body and output electrical signals. It has stable working performance and high accuracy, and the environmental background radiation has no effect on it. The pressure detection unit adopts PLD204E circular plate load cell, which has stable performance, high precision, and strong adaptability. The alarm uses LED lights and buzzers, and provides light display and sound alarm information at the same time.

Install the anti-overload device for passenger cars of this embodiment on the passenger car, connect the single-chip microcomputer to the positive power line of the engine fuel injection system switch, and connect the power lines to the normally closed contacts of the electromagnetic switch respectively. When the driver turns on the ignition switch, the device starts to work, and the D204B pyroelectric infrared sensor and the PLD204E circular plate force sensor start to continuously detect the infrared signal and pressure signal of getting on and off the bus, and send it to the single chip computer through the A/D conversion module .

The infrared sensor can distinguish whether the passenger is an adult or a child through different installation heights. For example, the height of the infrared sensor 1 in Figure 2 is set to 0.5m lower than the crouching height, and the height of the infrared sensor 2 is set to 1.2m. When infrared sensors (1, 2) all detected signals, then the single-chip microcomputer judged that adults got on and off the bus; if only infrared sensor 1 had a signal and infrared sensor 2 had no signal, the single-chip microcomputer then judged that it was children getting on and off the bus; according to infrared sensors (1, 2) The difference in signal sequence is detected, and the level signal is sent to the single-chip microcomputer, and the single-chip microcomputer performs addition and subtraction counting.

In order to prevent some of the passengers from lowering the height and getting on the bus, the infrared sensor 1 with a height of 0.5m and the pressure sensor 3 cooperate to detect. If only the infrared sensor 1 has a signal, and the pressure sensor 3 measures the mass m≥45kg, it is recorded as Adults, otherwise it is considered as a child, and the microcontroller will not count the child. Through this setting, the microcontroller can accurately calculate the number X of passengers on the bus. At the same time, the microcontroller will also compare X with the rated passenger capacity Y of the bus. If X>Y, the single-chip microcomputer judges that the bus is overloaded. At this time, the single-chip microcomputer will send instructions to the LED light and buzzer in the alarm. If the number of times reaches 3 and the bus is still overloaded, an instruction will be issued to the switch of the engine fuel injection system, so that the normally closed contact of the electromagnetic switch will be disconnected, and the switch of the fuel injection system will be cut off, so that the bus will be turned off and cannot be used; if X≤Y, The single-chip microcomputer judges that the passenger car is not overloaded, and the single-chip microcomputer will not send instructions to the switch of the engine fuel injection system, and the passenger car can run normally.

Claims (5)

1. A passenger car anti-overloading device, comprising an engine fuel injection system switch, is characterized in that it also includes an infrared sensor installed on one side of the car door, and a pressure sensor installed below the door pedal, and the infrared sensor and the pressure sensor pass through A/ The D conversion module is connected with the single-chip microcomputer, the single-chip microcomputer is also connected with an alarm, and the single-chip microcomputer is also connected with the switch of the engine fuel injection system. 2. passenger car anti-overloading device as claimed in claim 1, is characterized in that, described single-chip microcomputer adopts MC9S 12DG256VPV single-chip microcomputer. 3. The anti-overloading device for passenger cars as claimed in claim 1, wherein there are two infrared sensors located at different heights of the car doors. 4. The anti-overloading device for passenger cars according to claim 1, wherein the infrared sensor is a pyroelectric infrared sensor D204B. 5. The anti-overloading device for passenger cars according to claim 1, characterized in that the pressure sensor is a PLD204E disc load cell.

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