CN203203955U - Digital alcohol tester - Google Patents

Abstract

The utility model discloses a digital alcohol tester, which comprises a single-chip microcomputer, a display driver, a six-digit digital tube, an alcohol concentration sensor, an analog-to-digital conversion module, a temperature sensor, a sound and light alarm device, a data storage module, a keyboard module and a power supply module. The single-chip microcomputer controls the analog-to-digital conversion module to detect the data of the alcohol concentration sensor and the temperature sensor through the input and output ports, and displays the measurement data through the display driver and the six-digit digital tube; when the detected data exceeds the alarm threshold, an alarm is issued through the sound and light alarm device; The keyboard module controls or sets the display data or alarm threshold; the power supply module provides power for each module respectively. The utility model has the advantages of simple structure, low production difficulty, low cost, strong anti-interference, strong visualization, automatic over-limit alarm function, and can store the time and alcohol concentration value of each test, which is convenient for later reading and processing when needed, and improves the Alcohol concentration detection efficiency for drunk driving.

Description

Digital Alcohol Tester

technical field

The utility model relates to the technical field of alcohol testers, in particular to a digital alcohol tester.

Background technique

Drunk driving is prone to traffic accidents. In order to prevent motor vehicle drivers from drinking and driving, alcohol testing instruments are usually used to carry out on-the-spot detection to the drivers to determine whether the drivers drink alcohol. Alcohol testing instruments commonly used at home and abroad include fuel-type and semiconductor-type breath alcohol testers, but the structure of the fuel cell alcohol sensor used by the former is very precise, difficult to manufacture, and expensive; and the semiconductor type used by the latter The indication error and repeatability of the type sensor are not easy to meet the standard, and the anti-interference ability is poor. Therefore, the alcohol tester is gradually developing towards the combination of single-chip microcomputer and gas sensor. In addition, food processing, brewing and other occasions that need to monitor the alcohol concentration in the air also need to use alcohol testers.

Utility model content

In view of the shortcomings of traditional fuel-type and semiconductor-type breath alcohol testers, which are difficult to manufacture, expensive, and poor in anti-interference ability, the applicant has improved through research and provided a digital display, memory, alarm and temperature measurement. Functional digital alcohol tester.

The technical scheme of the utility model is as follows:

A digital alcohol tester includes a single-chip microcomputer, a display driver, a six-digit digital tube, an alcohol concentration sensor, an analog-to-digital conversion module, a temperature sensor, an audible and visual alarm device, a data storage module, a keyboard module, and a power supply module; The driver, analog-to-digital conversion module, temperature sensor, sound and light alarm device, data storage module and keyboard module are connected, which is the core of the digital alcohol tester, used for data analysis and processing and issuing control instructions; the input of the display driver and the single-chip microcomputer Connected, its output is connected with the input of the six-digit digital tube, which is used to drive the six-digit digital tube for display under the control of the single-chip microcomputer; the input of the six-digit digital tube is connected with the output of the display driver for displaying measurement data; The alcohol concentration sensor converts the detected alcohol concentration into an electrical signal, and its output is connected to the input of the analog-to-digital conversion module; the input of the analog-to-digital conversion module is connected to the output of the alcohol concentration sensor, and the output signal of the alcohol concentration sensor is simulated The digital signal is converted into a digital signal; the output of the analog-to-digital conversion module is connected to the single-chip microcomputer; the temperature sensor is used to detect temperature data, and its output is connected to the single-chip microcomputer; Light alarm; the data storage module is connected with the single-chip microcomputer for recording measurement data; the output of the keyboard module is connected with the single-chip microcomputer for controlling or setting the display data or alarm threshold; The module provides power.

Its further technical solution is: the single-chip microcomputer adopts STC89C52. The display driver uses MAX7219. The alcohol concentration sensor adopts MQ3. The ADC0832 integrated chip is used in the analog-to-digital conversion module. The temperature sensor adopts DS18B20. The data storage module adopts a circuit composed of AT24C16 storage chips.

The beneficial technical effect of the utility model is:

Compared with the existing breath-type alcohol tester, the digital alcohol tester provided by the utility model has the advantages of simple structure, low production difficulty, low cost, strong anti-interference, strong visualization, and automatic over-limit alarm function, which is more It is user-friendly, and can store the time and alcohol concentration of each test at the same time, which is convenient for later reading and processing when needed, and improves the efficiency of alcohol concentration detection for drunk driving. The utility model can also be used in enterprises in high-risk areas where drinking is forbidden to work, so as to prevent employees from being in danger after entering the post after drinking, and improve the safety guarantee of the enterprise.

Additional advantages of the present invention will be given in the description of the following specific embodiments, part will become apparent from the following description, or be understood through the practice of the present invention.

Description of drawings

Fig. 1 is a structural block diagram of a circuit module of the present invention.

Detailed ways

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described further.

Fig. 1 has shown the schematic circuit diagram of the utility model. As shown in Figure 1, the utility model comprises the following circuit modules: single-chip microcomputer 1, display driver 2, six digital tubes 3, alcohol concentration sensor 4, analog-to-digital conversion module 5, temperature sensor 6, sound and light alarm device 7, data storage Module 8, keyboard module 9 and power supply module 10.

As shown in Figure 1, single-chip microcomputer 1 is connected with display driver 2, analog-to-digital conversion module 5, temperature sensor 6, sound and light alarm device 7, data storage module 8 and keyboard module 9 respectively, is the core of the present utility model; Display driver The input of 2 is connected with the single-chip microcomputer 1, and its output is connected with the input of the six-digit digital tube 3; Connection; the output of the temperature sensor 6 is connected with the single-chip microcomputer 1; the input of the sound and light alarm device 7 is connected with the single-chip microcomputer 1; the data storage module 8 is connected with the single-chip microcomputer 1; the output of the keyboard module 9 is connected with the single-chip microcomputer 1; the power supply module 10 They are respectively connected with the above-mentioned modules to provide power for the above-mentioned modules.

Each module of the utility model can adopt commercially available commodity. In one embodiment, single-chip microcomputer 1 adopts STC89C52; Display driver 2 adopts MAX7219; Alcohol concentration sensor 4 adopts MQ3; Analog-to-digital conversion module 5 adopts ADC0832 integrated chip; Temperature sensor 6 adopts DS18B20; circuit.

In conjunction with Fig. 1, the working process of the present utility model is as follows:

The alcohol concentration sensor 4 converts the detected alcohol concentration into an electrical signal, and then transmits the electrical signal to the analog-to-digital conversion module 5 . The single-chip microcomputer 1 collects the digital signal converted by the analog-to-digital conversion module 5 , analyzes and processes it, and displays the result of the analysis and processing through a data display unit composed of a display driver 2 and a six-digit digital tube 3 . Utilize data storage module 8 to carry out the storage of alcohol concentration data as required again. Simultaneously, the temperature data detected by the temperature sensor 6 can be controlled and displayed by the keyboard module 9; the keyboard module 9 can also set the alcohol concentration overrun threshold, and when the detected alcohol concentration exceeds the set threshold, the single-chip microcomputer 1 sends a control command , the sound and light alarm device 7 is made to report to the police.

In summary, the utility model uses an alcohol concentration sensor to detect the concentration of alcohol in the exhaled gas of a person, and outputs a voltage signal, and then transmits the signal to a low-power, low-cost, high-performance CMOS single-chip microcomputer for processing through an analog-to-digital conversion device. And complete data collection, storage, display, overrun alarm and other functions. The utility model can also freely set information such as drinking and intoxication alarm values. When the tester alarms, it will be accompanied by sound alarm information, and the display module will also display corresponding prompt information to help the driver distinguish the alarm categories. It is simple and convenient to use.

In addition to being applicable to detect whether the driver of a motor vehicle is drunk driving and reduce the traffic accident rate caused by drunk driving, the utility model can also be used in enterprises in high-risk areas where drinking is forbidden to work, so as to prevent employees from becoming dangerous after entering the post after drinking. Improve enterprise security.

The above are only preferred implementations of the utility model, and the utility model is not limited to the above examples. It can be understood that other improvements and changes that are directly derived or conceived by those skilled in the art without departing from the basic concept of the present utility model shall be considered to be included in the protection scope of the present utility model.

Claims (7)

1. A digital alcohol tester, characterized in that it includes a single-chip microcomputer (1), a display driver (2), a six-digit digital tube (3), an alcohol concentration sensor (4), an analog-to-digital conversion module (5), a temperature Sensor (6), sound and light alarm device (7), data storage module (8), keyboard module (9) and power supply module (10); The single-chip microcomputer (1) is respectively connected with the display driver (2), the analog-to-digital conversion module (5), the temperature sensor (6), the sound and light alarm device (7), the data storage module (8) and the keyboard module (9), for The core of the digital alcohol tester, used for data analysis and processing and issuing control instructions; The input of the display driver (2) is connected to the single-chip microcomputer (1), and its output is connected to the input of the six-digit digital tube (3), which is used to drive the six-digit digital tube (3) for display under the control of the single-chip microcomputer (1) ; The input of the six-digit digital tube (3) is connected with the output of the display driver (2) for displaying measurement data; The alcohol concentration sensor (4) converts the detected alcohol concentration into an electrical signal, and its output is connected to the input of the analog-to-digital conversion module (5); The input of the analog-to-digital conversion module (5) is connected to the output of the alcohol concentration sensor (4), and the output signal of the alcohol concentration sensor (4) is converted into a digital signal; the output of the analog-to-digital conversion module (5) is connected to the single-chip computer (1) connected; The temperature sensor (6) is used to detect temperature data, and its output is connected with the single-chip microcomputer (1); The input of the sound and light alarm device (7) is connected with the single-chip microcomputer (1), and the sound and light alarm is performed under the control of the single-chip microcomputer (1); The data storage module (8) is connected with the single chip microcomputer (1) for recording measurement data; The output of the keyboard module (9) is connected to the microcontroller (1) for controlling or setting display data or alarm thresholds; The power supply module (10) is respectively connected with the above-mentioned modules to provide power for the above-mentioned modules. 2. The digital alcohol tester according to claim 1, characterized in that: the single-chip microcomputer (1) adopts STC89C52. 3. The digital alcohol tester according to claim 1, characterized in that: the display driver (3) adopts MAX7219. 4. The digital alcohol tester according to claim 1, characterized in that: the alcohol concentration sensor (4) adopts MQ3. 5. The digital alcohol tester according to claim 1, characterized in that: the analog-to-digital conversion module (5) adopts an ADC0832 integrated chip. 6. The digital alcohol tester according to claim 1, characterized in that: the temperature sensor (6) adopts DS18B20. 7. The digital alcohol tester according to claim 1, characterized in that: said data storage module (8) adopts a circuit composed of AT24C16 memory chips.

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