CN210863746U

CN210863746U - Portable alcohol tester

Info

Publication number: CN210863746U
Application number: CN201921876264.8U
Authority: CN
Inventors: 王文涛; 姜汉周; 武煜康; 宗臣; 杨希康; 杨志源
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-01
Filing date: 2019-11-01
Publication date: 2020-06-26
Anticipated expiration: 2029-11-01

Abstract

The utility model discloses a portable alcohol tester, including microprocessor, alcohol sensor, amplifier circuit, AD conversion module, display screen, button and power supply circuit, alcohol sensor pass through amplifier circuit and AD conversion module with microprocessor is connected, microprocessor respectively with display screen and button are connected, power supply circuit includes steady voltage chip, MOS pipe and trigger switch, the S utmost point of MOS pipe connects external voltage, the D utmost point of MOS pipe connects the voltage input end of steady voltage chip, the G utmost point of MOS pipe connects microprocessor, trigger switch is connected with microprocessor; the D pole of the MOS tube is provided with a controlled voltage V1, and the voltage stabilizing chip outputs a controlled voltage V2. The utility model discloses energy-conserving, can see directly perceivedly by the measuring person volume of blowing and can preserve and upload by the measuring person information of examining.

Description

Portable alcohol tester

Technical Field

The utility model relates to a portable alcohol tester.

Background

The alcohol tester is the indispensable instrument that the traffic police checked wine and drives, and current alcohol tester has following problem when using: 1. the battery is not durable. Because the machine is started for a long time for detection, the electric quantity is consumed too fast, and a user rarely turns off the power supply after detecting one, and turns on the power supply when detecting the next time. And frequent turning on and off of the power supply may reduce the service life. 2. During detection, some detected people pretend to blow air or blow little air, so that the measurement result is inaccurate. 3. The detected data can not be stored and lost at any time. Therefore, it is necessary to design an energy-saving alcohol tester which can visually see the air blowing amount of a detected person and can store and upload the detection information of the detected person.

SUMMERY OF THE UTILITY MODEL

The not enough to above-mentioned prior art, the utility model mainly designs an energy-saving portable alcohol tester, it can also see directly perceivedly by the measuring person volume of blowing and can preserve and upload by measuring person's detected information.

The utility model provides a technical scheme that its technical problem adopted is:

a portable alcohol tester comprises a microprocessor, an alcohol sensor, an amplifying circuit, an AD conversion module, a display screen, keys and a power circuit, wherein the alcohol sensor is connected with the microprocessor through the amplifying circuit and the AD conversion module; the D pole of the MOS tube is provided with a controlled voltage V1, and the voltage stabilizing chip outputs a controlled voltage V2.

The device also comprises a gas flow meter arranged in a pipe orifice of the air blowing end of the alcohol tester, the gas flow meter is in control connection with the microprocessor, and an exhaust flow indicator lamp is arranged on the shell of the alcohol tester. Further, the gas flowmeter comprises an impeller and a rotating speed sensor, the impeller is arranged in an air inlet of the portable alcohol tester, the rotating speed sensor is located at one end of a rotating shaft of the impeller, and the rotating speed sensor is connected with the microprocessor.

The alcohol tester also comprises a card reader and a wireless communication module which are connected with the microprocessor, a slot which can be inserted with an identity card is arranged at the bottom of the shell of the alcohol tester, a somewhat movable trigger switch is arranged in the slot, and the trigger switch is pressed and triggered by the identity card after the identity card is inserted into the slot.

The utility model has the advantages that: through the design of the energy-saving circuit, the power consumption of the device is greatly reduced, the service life is greatly prolonged, and the power-on is ensured only when the detection is carried out by matching with the trigger switch in the slot. The designed gas flow monitoring device can visually see the blowing action of a detected person, and the identity card information is read in a matching manner, so that the authenticity of detection is ensured.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic circuit diagram of the present invention;

FIG. 3 is a schematic view of an impeller installation;

fig. 4 is a schematic view of an impeller and a rotational speed sensor.

In the figure, a shell 1, a slot 11, a trigger switch 12, an air inlet 13, an impeller 2, a rotating shaft 21, a magnetic point 22, a blade 23, a rotating speed sensor 3, an airflow indicating lamp 4, a slope mark 5 and a baffle 6.

Detailed Description

For a better understanding of the present invention, embodiments of the present invention will be explained in detail below with reference to fig. 1 to 4.

The utility model discloses a portable alcohol tester includes the shell, sets up microprocessor, alcohol sensor, amplifier circuit, AD conversion module, display screen, button and power supply circuit in shell 1. As shown in fig. 2, the alcohol sensor is an MQ3 alcohol sensor, the alcohol sensor is connected with the microprocessor (AT 89C51 or other types of single-chip microcomputer, hereinafter referred to as AT89C51 for example) through the amplifying circuit (using an LM393 chip) and the AD conversion module, an OUT output pin of the LM393 is connected with a VIN pin of the ADC0804, and the ADC0804 is connected with the AT89C51 single-chip microcomputer. And the microprocessor is respectively connected with the display screen and the keys. The above all adopt the prior art, and the specific circuit connection is also a conventional technical means, and is not described again. The utility model discloses key design as follows: the power supply circuit comprises a voltage stabilizing chip (TPS 78228 is preferably adopted), an MOS tube and a trigger switch SB, wherein a source electrode S of the MOS tube is connected with an external 3.6V battery power supply (specific value can be determined according to requirements), a drain electrode D of the MOS tube is connected with a voltage input end VIN of the voltage stabilizing chip, a grid electrode G of the MOS tube is connected with a P1.0 pin of the microprocessor, an EN pin of the voltage stabilizing chip is connected with a P1.1 pin of the microprocessor, and a pull-down resistor R7 is arranged at the EN pin. The trigger switch SB is connected with the microprocessor. The drain D of the MOS tube is provided with a controlled voltage V1, the voltage stabilizing chip outputs a controlled voltage V2, the voltage V2 is 2.8V, the voltage stabilizing chip provides working voltage for a wireless communication module, a card reader, a flow meter and an indicator light, and the voltage V1 provides working voltage for other components. The working principle of the power circuit is as follows: when the P1.0 pin of the microprocessor outputs a low level, the MOS transistor is turned on, V1 is 3.6V, and the device requiring V1 to supply power starts to operate; when the pin P1.0 outputs a high level, the MOS transistor is turned off, and V1 is equal to 0V. When the pin P1.1 outputs a high level, the voltage regulator chip operates normally, V2 is 2.8V, and the components requiring V2 for power supply start to operate, and when the pin P1.1 outputs a low level, V2 is 0V. Of course, the specific voltage values of V1 and V2 may also be set as desired. Through the design of the power supply circuit, the microprocessor is powered on to be in a low power consumption state in a starting state, and when detection is needed, the trigger switch SB is pressed to supply power for other components through the power supply circuit.

In order to guarantee that the person being detected normally blows, prevent to only contain the gas blow pipe and do not blow or blow a bit of gas, the utility model discloses still be provided with gas flowmeter in the mouth of pipe of alcohol tester end of blowing, gas flowmeter with microprocessor control connects be provided with a gas flow pilot lamp on alcohol tester's the shell. To gas flowmeter, can adopt current miniature pipeline gas flow sensor, the utility model designs a gas flowmeter with low costs simple structure principle, as shown in figure 3 and figure 4, this gas flowmeter includes impeller 2 and revolution speed sensor 3, as shown in figure 3 set up in portable alcohol tester's the air inlet 13 impeller 2, the blade 23 setting of impeller are in pivot 21, and the both ends of pivot are rotatable installs on the air inlet inner wall. Of course, it is possible to design the baffle 6 in the air inlet, as shown in fig. 3, with the air outlet left at one end of the baffle, and the impeller 2 below the air outlet. Specifically, a circular groove which corresponds to the rotating shaft and is slightly larger than the rotating shaft in diameter can be arranged on the inner wall of the air inlet, and the rotating shaft can rotate in the rotating groove. Bearings may also be provided within the circular grooves. The rotating speed sensor is located at one end of a rotating shaft 21 of the impeller 2, preferably, the rotating speed sensor 3 adopts a Hall sensor, a magnetic point 22 is arranged on the rotating shaft 21, the rotating speed sensor 3 is connected with the microprocessor, and the rotating speed of the rotating shaft is detected by the Hall sensor in the prior art, so that the circuit connection is not repeated herein. An exhaust flow indicator lamp 4 is arranged on the shell 1 of the alcohol tester, after the microprocessor receives a detection signal of the Hall sensor, the number of the exhaust flow indicator lamps 4 is sequentially lightened according to the rotating speed, and the larger the rotating speed is, the more the illuminated exhaust flow indicator lamps 4 are. An increasing slope mark 5 is also arranged above the airflow indicating lamp 4 and used for marking the airflow to be larger and larger.

In order to carry out identification to the person being detected, with its identity information and the same packing of detection data and preserve, the utility model discloses still include with card reader and wireless communication module (can adopt the zigbee chip) that microprocessor connects are provided with the slot 11 that can insert the ID card in the 1 bottom of the casing of alcohol tester set up the trigger switch 12 (the trigger switch SB in figure 2 in the slot 11 of a bit movable type, in the embodiment that does not adopt the identification module, trigger switch SB is the press the switch that sets up on shell 1), insert as the ID card after slot 11, trigger switch 12 is pressed by the ID card and is triggered, at this moment, microprocessor control power supply circuit work, for each components and parts power supply.

Claims

1. The utility model provides a portable alcohol tester, includes microprocessor, alcohol sensor, amplifier circuit, AD conversion module, display screen, button and power supply circuit, the alcohol sensor passes through amplifier circuit and AD conversion module with microprocessor connects, microprocessor respectively with display screen and button connection, its characterized in that: the power supply circuit comprises a voltage stabilizing chip, an MOS tube and a trigger switch, wherein the S pole of the MOS tube is connected with external voltage, the D pole of the MOS tube is connected with the voltage input end of the voltage stabilizing chip, the G pole of the MOS tube is connected with the microprocessor, and the trigger switch is connected with the microprocessor; the D pole of the MOS tube is provided with a controlled voltage V1, and the voltage stabilizing chip outputs a controlled voltage V2.

2. The portable alcohol tester as recited in claim 1, wherein: the device also comprises a gas flow meter arranged in a pipe orifice of the air blowing end of the alcohol tester, the gas flow meter is in control connection with the microprocessor, and an exhaust flow indicator lamp is arranged on the shell of the alcohol tester.

3. The portable alcohol tester as recited in claim 2, wherein: the gas flowmeter comprises an impeller and a rotating speed sensor, wherein the impeller is arranged in an air inlet of the portable alcohol tester, the rotating speed sensor is located at one end of a rotating shaft of the impeller, and the rotating speed sensor is connected with the microprocessor.

4. The portable alcohol tester as recited in claim 1, wherein: the alcohol tester also comprises a card reader and a wireless communication module which are connected with the microprocessor, a slot which can be inserted with an identity card is arranged at the bottom of the shell of the alcohol tester, a somewhat movable trigger switch is arranged in the slot, and the trigger switch is pressed and triggered by the identity card after the identity card is inserted into the slot.