CN2435288Y

CN2435288Y - Cut-off protection for driving after drinking wine

Info

Publication number: CN2435288Y
Application number: CN 00223767
Authority: CN
Inventors: 崔太平
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-07-21
Filing date: 2000-07-21
Publication date: 2001-06-20
Anticipated expiration: 2010-07-21

Abstract

The utility model discloses a cut-off protection device for driving after drinking wine, which comprises a sampling return circuit, a comparing control return circuit, and an alarm return circuit, wherein, the sampling return circuit is composed of a gas sensing element. The utility model is characterized in that the gas sensing element in the sampling return circuit is arranged in an automobile driving cab; the comparing control return circuit comprises a comparator and a relay which is connected with the output end of the comparator, wherein, one input end of the comparator is connected with one detecting electrode of the gas sensing element, and contacts of the relay is respectively connected in series with the alarm return circuit and a motor control return circuit. The utility model has the advantages that drunk driving can be prevented; the utility model has active effects in ensuring traffic safety and reducing traffic accidents; the operation is reliable, and the cost of use is low.

Description

The power-off protection apparatus of driving when intoxicated

The utility model relates to a kind of power-off protection apparatus, particularly a kind of power-off protection apparatus of driving when intoxicated.

In the traffic accident that takes place, the accident that leads to because of driving when intoxicated is occupied sizable ratio, forbids that it is the effective measures that reduce traffic accident that chaufeur is driving a car under the influence of alcohol.At present, traffic constable uses the alcohol concentration survey meter to check whether chaufeur drinks.The gas that this survey meter adopts gas sensor that chaufeur is breathed out detects, if contain alcohol in the gas, the gas sensor resistance will change, and be converted into the variation of electric signal and will be shown as corresponding alcohol concentration by circuit.Though this device has the characteristics of the usefulness of being simple and easy to, adopt this device all chaufeurs to be detected in real time and control, those not checked drunken drivings are still the major hidden danger of safety traffic.

The purpose of this utility model provides a kind of power-off protection apparatus of driving when intoxicated, and promptly drives when intoxicated when chaufeur, and this fender guard is with automatic combustion cutoff power supply.

The utility model comprises the sampling circuit that gas sensor constitutes, and key is also to comprise comparison control loop and alarm loop; Gas sensor in the described sampling circuit is arranged on the indoor direction machine of vehicle drive; Described relatively control loop comprises comparator, with comparator output terminal bonded assembly relay, the contact of described relay is series at engine control loop and alarm loop respectively, one input end of described comparator is connected with a detection utmost point of gas sensor in the sampling circuit, and the other end is connected with divider resistance.

Above-mentioned alarm loop comprises flashing light alarm and audio alert loop.

Chaufeur is the drinking drive automobile not, and the controlling of sampling loop does not detect alcoholic gas, and then comparator is output as lowly, and relay is failure to actuate, to the control of driving engine and alarm loop with inoperative; Drive after chaufeur is drunk, sampling circuit will detect alcoholic gas, and comparator is output as high level, relay coil gets electronic work, the engine control loop will be cut off, and flashing light alarm and audio alert loop works remind chaufeur to forbid after drinking driving simultaneously.

The utility model adopts and to be arranged on the gas that the gas sensor that is used for detecting alcohol in the operator's compartment breathes out to chaufeur and to detect; and check with this whether chaufeur belongs to and drive when intoxicated, to this power-off protection apparatus of drunken driving with combustion cutoff control loop power supply and report to the police.Therefore the utility model can be controlled in real time to driving when intoxicated, and has overcome alcohol survey meter in the background technology and can only lean on traffic constable control few part to be examined the defective of chaufeur, to guaranteeing safety traffic, reducing traffic accident and have vital function; The utility model also has reliable operation and the lower advantage of use cost simultaneously.

Fig. 1 is a block diagram of the present utility model;

Fig. 2 is schematic circuit diagram of the present utility model;

The schematic diagram that Fig. 3 controls driving engine for the utility model.

Among the figure: 1, sampling circuit, 2, control loop relatively, 3, alarm loop.

Embodiment: as Fig. 2 ,+12V power supply is provided by automobile power source, and resistance R 1, R2, R3 are series at power positive cathode, and its resistance is respectively 2k, 5k, 5k; Gas sensor M adopts the MQ-3 type, and two add thermoae f1 and f2 divides in addition and is connected with point of connection and the power cathode of resistance R 2 and R3, detects utmost point A and links to each other with the point of connection of resistance R 1 and R2, and detection utmost point B is that the resistance R 7 of 2k is connected with power cathode by resistance; Resistance R 5, R6 are series at power positive cathode, and resistance is respectively 2k, 4k; The negative input of amplifier IC1 is connected with the C point, and positive input detects utmost point B with gas sensor M and is connected, and mouth is that the resistance R 8 of 5.1k is connected with the base stage of aerotron BG by resistance; Relay J 1 and diode D2 are parallel to transistor collector and positive source, the open contact J1-1 of relay J 1, resistance R 9, R10 are series at power positive cathode, the resistance of resistance R 9, R10 is 2k, the normally closed contact J1-2 of relay J 1 is connected in driving engine M1 control loop, as shown in Figure 3; Der Blink und Abblendschalter IC2 adopts the SL3909 integrated circuit, and its power input is connected with the E point by resistance R 11, and all the other connect in the usual way, and resistance R 11, R12 resistance are respectively 0.001k, 1.5k, and capacitor C 2 is 400 μ F; The power input of speech IC IC3 is connected with negative pole with the E point respectively, and mouth is connected with an end of piezoelectric buzzer.

During this utility model work, the A point is 10V to power cathode voltage, and gas sensor M heating voltage across poles is 5V.When alcohol-free gas, C point current potential is higher than B point current potential, and comparator output terminal is an active potential, and aerotron BG ends.When detecting alcohol gas, gas sensor M surface electrical resistance reduces, B point current potential raises gradually because of capacitor C 1 effect and is higher than C point current potential, and comparator output terminal becomes high potential, aerotron BG conducting, relay J 1 coil gets electric and moves, its open contact J1-1 closure, alarm loop work, normally closed contact J1-2 disconnects, driving engine M1 current supply circuit is cut off, and reaches the purpose that makes the drunken driving can't start automobile with this.

Claims

1, a kind of power-off protection apparatus of driving when intoxicated comprises the sampling circuit that gas sensor constitutes, and it is characterized in that also comprising comparison control loop and alarm loop; Gas sensor in the described sampling circuit is arranged on the indoor direction machine of vehicle drive; Described relatively control loop comprises comparator, with comparator output terminal bonded assembly relay, the contact of described relay is series at engine control loop and alarm loop respectively, one input end of described comparator is connected with a detection utmost point of gas sensor in the sampling circuit, and the other end is connected with divider resistance.

2, the power-off protection apparatus of driving when intoxicated according to claim 1 is characterized in that described alarm loop comprises flashing light alarm and audio alert.