CN210037692U

CN210037692U - High-precision miniature air-blowing type alcohol gas detector and detection system thereof

Info

Publication number: CN210037692U
Application number: CN201920382694.8U
Authority: CN
Inventors: 郑盈盈; 程磊; 陈仿林
Original assignee: Hefei Juyi Electric Technology Co Ltd
Current assignee: Hefei Juyi Electric Technology Co Ltd
Priority date: 2019-03-25
Filing date: 2019-03-25
Publication date: 2020-02-07
Anticipated expiration: 2029-03-25

Abstract

The utility model discloses a high-precision micro air-blowing type alcohol gas detector and a detection system thereof, which belong to the technical field of alcohol detection, wherein the detector comprises a circuit board and an alcohol sensor, the circuit board is arranged in a shell, an electric joint is arranged at one end of the shell, and the surface of the circuit board is provided with the alcohol sensor, an ADC acquisition module, an acquisition driving module, a control module and a storage module; the detection system comprises a detector body and a mobile terminal, wherein the mobile terminal is used for displaying an alcohol detection result and providing electric energy for the detector through a power taking module in the control module. The utility model discloses used detector simple structure, small in size can get the electricity on being connected to mobile terminal through electric connection, need not built-in power supply, along with inserting along with using convenient to use, ADC collection module is through gathering drive module control work, and only ADC collection module just opens when the alcoholic strength is higher and carries out data acquisition, can practice thrift the electric energy effectively.

Description

High-precision miniature air-blowing type alcohol gas detector and detection system thereof

Technical Field

The utility model relates to an alcohol detects technical field, in particular to miniature air blowing type alcohol gas detector of high accuracy and detecting system thereof.

Background

The existing alcohol tester in the market is an instrument which converts alcohol gas exhaled by the lung of a person into an electric signal and is represented by a number, and can be used as an important detection tool for detecting the alcohol content of a drinker in the process of law enforcement by traffic police so as to effectively reduce the occurrence of serious traffic accidents; the method can also be used in other application scenes to avoid personal casualties and heavy property loss, such as enterprises which forbid post-drinking in some high-risk fields.

The alcohol tester in the prior art is large in size and inconvenient to carry, the electrochemical alcohol sensor is low in precision, a battery needs to be replaced or charged frequently when the battery is charged or a dry battery is used for supplying power, and the problem of sanitation and safety of a blow pipe type contact blow nozzle is solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a miniature air blowing type alcohol gas detector of high accuracy and detecting system thereof in order to break through the problem of alcohol test instrument among the market prior art, have based on mobile phone terminal along with inserting along with usefulness, simple structure, small in size, high accuracy, low-cost need not the advantage of outside power supply.

The utility model realizes the above purpose by the following technical proposal, the high-precision micro air-blowing type alcohol gas detector comprises a detector body consisting of a circuit board and an alcohol sensor, wherein the circuit board is arranged inside a shell, one end of the shell is provided with an electric joint, and the surface of the circuit board is provided with the alcohol sensor, an ADC acquisition module, an acquisition driving module, a control module and a storage module;

the acquisition driving module is used for driving the ADC acquisition module to work, and the ADC acquisition module is used for converting acquired analog signals into digital signals;

the alcohol detection resistor in the alcohol sensor is a variable resistor, the variable resistor and the fixed value resistor are subjected to voltage division, and the voltage output end of the alcohol sensor is electrically connected with the voltage input end of the ADC acquisition module;

the control module is used for controlling the acquisition driving module to drive the ADC acquisition module and receiving signals of the ADC acquisition module.

Preferably, the electrical connector is a type-c interface.

Preferably, the collection driving module is internally composed of two constant value resistors with divided voltages, and the voltage output end of the collection driving module is electrically connected with the input end of the ADC collection module.

Preferably, the control module is a single chip microcomputer of a model CH549F, a 12-bit ADC integrated with a built-in clock, a USB host, an equipment mode, a timer, a power-taking module and a comparator are arranged in the control module.

Preferably, the electricity taking module is used for obtaining electric energy for the work of each component, and the comparator is used for comparing the voltage output by the alcohol sensor with the voltage output by the acquisition driving module.

Preferably, the storage module is a FLASH memory chip of model W25N01GV, and the memory 128M is used for storing an APP installation package for alcohol detection.

The detection system based on the high-precision miniature air-blowing type alcohol gas instrument comprises a detector body and a mobile terminal, wherein the detector body is electrically connected with the mobile terminal through an electric connector.

Preferably, the mobile terminal is used for displaying the alcohol detection result and providing electric energy for the detector through a power taking module in the control module.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses used detector simple structure, small in size, can get the electricity on being connected to mobile terminal through electric connection, need not built-in power supply, do not need worry power consumption problem, ADC collection module is through gathering drive module control work, only ADC collection module just opens when the alcoholic strength is higher and carries out data acquisition, can practice thrift the electric energy effectively, and this detector is inside to include by storage module, the installation package of APP is used in the storage alcohol detection, when the detector passes through type-c interface and inserts mobile terminal, can directly install the APP unit on mobile terminal, need not the network and download this APP, reach the effect along with inserting along with using.

Drawings

Fig. 1 is the structure diagram of the detector of the present invention.

Fig. 2 is a schematic diagram of the detection system of the present invention.

Fig. 3 is a schematic circuit diagram of the alcohol sensor and the collection driving module of the present invention.

Fig. 4 is the structural schematic diagram of the single chip microcomputer in the control module.

Fig. 5 is a schematic diagram of the memory chip of the present invention.

In the figure: 1. casing, 2, electrical connector, 3, circuit board, 4, alcohol sensor.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Referring to fig. 1-2, the high-precision micro-blowing alcohol gas detector comprises a detector body consisting of a circuit board 3 and an alcohol sensor 4, wherein the circuit board 3 is installed inside a shell 1, one end of the shell 1 is provided with an electrical connector 2, and the surface of the circuit board 3 is provided with the alcohol sensor 4, an ADC acquisition module, an acquisition driving module, a control module and a storage module; the acquisition driving module is used for driving the ADC acquisition module to work, the ADC acquisition module is used for converting acquired analog signals into digital signals, and the digital signals are convenient for the control module to receive; the alcohol detection resistor inside the alcohol sensor 4 is a variable resistor, the variable resistor and the fixed value resistor are used for voltage division, and the voltage output end of the alcohol sensor 4 is electrically connected with the voltage input end of the ADC acquisition module; the control module is used for controlling the acquisition driving module to drive the ADC acquisition module and receiving signals of the ADC acquisition module, the detection system based on the high-precision micro air-blowing type alcohol gas detector comprises a detector body and a mobile terminal, the detector body is electrically connected with the mobile terminal through an electric connector 2, the mobile terminal is used for displaying an alcohol detection result, and the electricity-taking module in the control module provides electric energy for the detector, the model of the alcohol sensor 4 is MP-3B, a multilayer thick film manufacturing process is adopted, a heater and a metal oxide semiconductor gas-sensitive layer are respectively manufactured on two sides of a micro Al2O3 ceramic substrate and are encapsulated in a metal shell, the method has good sensitivity to alcohol in a wide concentration range, and has the advantages of low power consumption, quick response recovery, excellent selectivity, simple detection circuit, good stability, long service life and the like.

Referring to fig. 3-4, the collection driving module is internally composed of two divided constant value resistors, the voltage output end of the collection driving module is electrically connected with the input end of the ADC collection module, the control module is a single chip microcomputer of type CH549F, a clock integrated 12-bit ADC is built in, a USB host, a device mode, a timer, a power-taking module and a comparator, the alcohol sensor 4 is heated by power, when not contacting alcohol, the internal resistance is large, when contacting alcohol, the resistance is rapidly reduced, by using the characteristic and combining with the voltage division principle, the

internal detection resistors

3 and 4 and R7 of the sensor divide voltage, the voltage value of P10 is proportional to the change of alcohol concentration, the P10 is output to the ADC collection module for conversion and processing, the R3 and R8 in the collection driving module form a voltage division network to obtain a P11 voltage value, which is also output to the ADC collection module for conversion and processing, and finally output to the comparator in the control module for comparison, when the voltage of P10 is higher than the voltage value of P11, the ADC acquisition module is triggered to work, the voltage amplitude signal of P10 is sent to an AIN0 pin of an ADC in a single chip microcomputer CH549F, the threshold voltage signal of P11 is sent to an AIN1 pin of an ADC in a single chip microcomputer CH549F, the voltage amplitude signal is sent to a negative input end of a comparator through code configuration of the single chip microcomputer, the P10 signal is also connected to a positive input end of the comparator through code configuration, the ADC acquisition module is triggered to start sampling when the alcohol sensor 4 is contacted with alcohol gas, the sampling is finished after the alcohol sensor is timed for 10S through an internal timer of the single chip microcomputer, and finally the mobile.

Referring to fig. 2-5, the electrical connector 2 is a type-c interface, the power-taking module is used for obtaining the electrical energy for the operation of each component, the comparator is used for comparing the voltage output by the alcohol sensor 4 with the voltage output by the acquisition driving module, a 5.1 kilo ohm pull-down resistor is connected to the CC pin according to the official protocol of the type-c interface, namely 5V500mA power can be reversely obtained from VBUS, and then converted into 3.3V and 2.5V power through the LDO in the chip of the single chip microcomputer CH549F and the RT9193 independent LDO power chip, so as to provide power for the single chip microcomputer, the alcohol sensor 4 and the storage FSASH, without installing a battery or other power adapters for power supply, the storage module is a FLASH memory chip of the type W25N01GV, the memory 128M is used for storing an APP installation package for alcohol detection, the SPI pin is externally connected with an SPI FLASH memory chip, and is virtualized into a 128M U disk through codes, so as to provide an APP software, the method does not need to download operation from an application market, and can be used in a network-free environment.

The utility model discloses a theory of operation: the detector has simple structure, can be carried about, is matched with a detection system to detect alcohol gas, only needs to insert the electric connector 2 of the type-c interface into a smart phone when in use, installs an alcohol detection APP single machine on the smart phone through a storage module, can get electricity through an official protocol of the type-c interface by a control module inside the detector, provides electric energy for normal work of the detector, and when in alcohol detection, a detected person only needs to blow towards the alcohol sensor 4, if no alcohol is detected, the voltage value output by the alcohol sensor 4 is smaller than the voltage value output by the acquisition driving module, the control module can not start the ADC acquisition module to acquire alcohol data, if alcohol is detected, the voltage value output by the alcohol sensor 4 is higher than the voltage value output by the acquisition driving module, and the ADC acquisition module starts to work, and displaying the acquired alcohol measurement result through an APP installed on the smart phone.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. Miniature air blowing type alcohol gas detector of high accuracy, the detector body that includes circuit board (3) and alcohol sensor (4) constitution, its characterized in that: the alcohol sensor (4), the ADC acquisition module, the acquisition driving module, the control module and the storage module are mounted on the surface of the circuit board (3);

the alcohol detection resistor in the alcohol sensor (4) is a variable resistor, the variable resistor and the fixed value resistor are subjected to voltage division, and the voltage output end of the alcohol sensor (4) is electrically connected with the voltage input end of the ADC acquisition module;

2. The micro air-blowing alcohol gas detector of claim 1, wherein: the electric connector (2) is a type-c interface.

3. The micro air-blowing alcohol gas detector of claim 1, wherein: the acquisition driving module is internally composed of two fixed-value resistors with divided voltages, and the voltage output end of the acquisition driving module is electrically connected with the input end of the ADC acquisition module.

4. The micro air-blowing alcohol gas detector of claim 1, wherein: the control module is a single chip microcomputer with the model CH549F, a 12-bit ADC integrated with a built-in clock, a USB host, an equipment mode, a timer, a power taking module and a comparator.

5. The micro air-blowing alcohol gas detector of claim 4, wherein: the electricity taking module is used for obtaining electric energy for the work of each component, and the comparator is used for comparing the voltage output by the alcohol sensor (4) with the voltage output by the collecting driving module.

6. The micro air-blowing alcohol gas detector of claim 1, wherein: the storage module is a FLASH storage chip with the model W25N01GV, and the memory 128M is used for storing an APP installation package for alcohol detection.

7. The detection system of the high-precision micro air-blowing type alcohol gas detector based on any one of claims 1 to 6, characterized in that: the detector comprises a detector body and a mobile terminal, wherein the detector body is electrically connected with the mobile terminal through an electric connector (2).

8. The detecting system of the micro air-blowing type alcohol gas detector of claim 7, wherein: the mobile terminal is used for displaying an alcohol detection result and providing electric energy for the detector through the power taking module in the control module.