阅读说明：本技术 一种车内空气质检系统 (Air quality inspection system in car ) 是由 路秀生 王文浩 冯硕 于 2018-06-19 设计创作，主要内容包括：一种车内空气质检系统,属于传感器检测技术领域,是主要由传感器阵列、信号调理电路、气路控制模块、存储模块、温度传感器、主控芯片、键盘模块、显示模块和声光报警模块组成的,其特征在于：所述传感器阵列和信号调理电路相连接,信号调理电路、气路控制模块、存储模块、温度传感器均与主控芯片相连接,键盘模块、显示模块和声光报警模块均设置在主控芯片的输出端,本发明的车内空气质检系统,便携、可靠性高、操作简单、成本低,能够真实反映车内污染气体种类及含量的检测仪,具有非常现实的意义。(The utility model provides an air quality testing system in car, belongs to sensor detection technical field, is mainly by sensor array, signal conditioning circuit, gas circuit control module, storage module, temperature sensor, main control chip, keyboard module, display module and audible-visual alarm module constitute, its characterized in that: the in-vehicle air quality inspection system is portable, high in reliability, simple to operate and low in cost, can truly reflect the type and content of the pollution gas in the vehicle, and has very practical significance.)

1. The utility model provides an air quality testing system in car, is mainly by sensor array, signal conditioning circuit, gas circuit control module, storage module, temperature sensor, main control chip, keyboard module, display module and audible-visual alarm module constitute, its characterized in that: the sensor array is connected with the signal conditioning circuit, the gas circuit control module, the storage module and the temperature sensor are all connected with the main control chip, and the keyboard module, the display module and the acousto-optic alarm module are all arranged at the output end of the main control chip.

2. The in-vehicle air quality inspection system according to claim 1, characterized in that: the sensor array comprises a formaldehyde gas sensor ME₃M-CH₂O and styrene gas sensor GS 2602.

3. The in-vehicle air quality inspection system according to claim 1, characterized in that: the main control chip adopts a C8051F020 main control chip, 8 channels of the ADC0 are led out on the circuit board through 8 contact pin pins, and the purpose of the method is to collect different signals into the singlechip and further process data in the subsequent design process. Because the system only collects the concentration of two gases of formaldehyde and styrene in the experimental process, the channels AINO and AIN1 are set to be in single-end input mode and are analog voltage signal input channels of a formaldehyde gas sensor and a styrene gas sensor respectively.

Technical Field

The invention relates to an in-vehicle air quality detection system, and belongs to the technical field of sensor detection.

Background

Since the 21 st century, the economy of China is rapidly developed, the quality of life of people is continuously improved, automobiles are more and more commonly used in daily life, meanwhile, most consumers need to decorate the interior of the automobile after buying the automobile, even some automobiles need to be re-decorated after being driven for a period of time, some merchants take the automobile-purchased ornaments as sales promotion means, so that decorative materials containing toxic substances enter the automobile, and the toxic gases inevitably pollute the air in the automobile, so that people are poisoned unconsciously. The invention develops an in-vehicle air quality inspection system.

Disclosure of Invention

Aiming at the defects, the invention provides an in-vehicle air quality detection system.

The invention is realized by the following technical scheme: the utility model provides an air quality testing system in car, is mainly by sensor array, signal conditioning circuit, gas circuit control module, storage module, temperature sensor, main control chip, keyboard module, display module and audible-visual alarm module constitute, its characterized in that: the sensor array is connected with the signal conditioning circuit, the gas circuit control module, the storage module and the temperature sensor are all connected with the main control chip, and the keyboard module, the display module and the acousto-optic alarm module are all arranged at the output end of the main control chip.

The sensor array comprises a formaldehyde gas sensor ME₃M-CH₂O and styrene gas sensor GS 2602.

The main control chip adopts a C8051F020 main control chip, 8 channels of the ADC0 are led out on the circuit board through 8 contact pin pins, and the purpose of the method is to collect different signals into the singlechip and further process data in the subsequent design process. Because the system only collects the concentration of two gases of formaldehyde and styrene in the experimental process, the channels AINO and AIN1 are set to be in single-end input mode and are analog voltage signal input channels of a formaldehyde gas sensor and a styrene gas sensor respectively.

The invention has the advantages that: the in-vehicle air quality detection system is portable, high in reliability, simple to operate and low in cost, can truly reflect the type and content of the in-vehicle polluted gas, and has very practical significance.

Drawings

FIG. 1 is a schematic diagram of the system of the present invention.

In the figure, the device comprises a sensor array 1, a signal conditioning circuit 2, a gas circuit control module 3, a storage module 4, a temperature sensor 5, a main control chip 6, a keyboard module 7, a display module 8, a sound-light alarm module 9.

Detailed Description

The utility model provides an air quality testing system in car, is mainly by sensor array 1, signal conditioning circuit 2, gas circuit control module 3, storage module 4, temperature sensor 5, main control chip 6, keyboard module 7, display module 8 and acousto-optic warning module 9 constitute, its characterized in that: the sensor array 1 is connected with the signal conditioning circuit 2, the signal conditioning circuit 3, the gas circuit control module 4, the storage module 5 and the temperature sensor 5 are all connected with the main control chip 6, and the keyboard module 7, the display module 8 and the acousto-optic alarm module 9 are all arranged at the output end of the main control chip.

The sensor array 1 comprises a formaldehyde gas sensor ME₃M-CH₂O and styrene gas sensor GS 2602.

The main control chip 6 adopts a C8051F020 main control chip, 8 channels of the ADC0 are led out on the circuit board through 8 contact pin pins, and the purpose of the method is to collect different signals into a single chip microcomputer and perform further data processing in the subsequent design process. Because the system only collects the concentration of two gases of formaldehyde and styrene in the experimental process, the channels AINO and AIN1 are set to be in single-end input mode and are analog voltage signal input channels of a formaldehyde gas sensor and a styrene gas sensor respectively.

This device is at the during operation, in the experimentation, let in the air chamber with clean air, wash and zero signal's benchmark correction to the sensor, the gas (like formaldehyde) that will dispose the known concentration after the washing is accomplished is even, steady lets in the air chamber, react with the sensor, output corresponding signal of telecommunication, after carrying out processing such as filtering, enlargeing to the gained signal, convert the digital quantity into by singlechip AD, and give SD card with data transfer through SPI serial bus, the data that represent gas concentration information just is saved in the document of TXT form. The switching of the gas path sampling channel is realized through the key, another gas (such as styrene) is detected, and the working process is the same as the above. The system is used for a sensor for detecting gas concentration and is provided with a corresponding conditioning circuit; designing a gas path for controlling gas circulation to sample harmful gas, designing a gas chamber for placing a sensor array according to the sizes of the sensor and the conditioning circuit, and determining the placement position of the sensor array in the gas chamber by observing the gas inlet and outlet conditions of gas in the gas chamber; the method comprises the following steps of carrying out single chip microcomputer model selection, designing a corresponding peripheral circuit according to functions to be realized by the system, and realizing data transplantation from a lower computer to an upper computer by establishing a FATFS file system for an SD card; the software design of the lower computer is completed, and the functions of data storage, display, sound and light alarm and the like corresponding to the hardware circuit are realized; LabVIEW upper computer development software is used as an auxiliary tool to complete functions of temperature compensation, concentration calibration and the like of data. The sensor array is a gas detection element, and the external SD card is a hardware system of the data storage module. In the process of debugging the system, software developed by Lab VIEW in an upper computer is used as an auxiliary module, and data stored in an SD card is subjected to temperature compensation, concentration calibration and other processing so as to obtain the concentration value of gas directly through digital quantity subjected to A/D conversion by a single chip microcomputer when lower computer software is designed.

It will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in the embodiments described above without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims.