CN210923640U

CN210923640U - Portable indoor formaldehyde detection device

Info

Publication number: CN210923640U
Application number: CN201921978358.6U
Authority: CN
Inventors: 余燕娟; 高翔
Original assignee: Zhangzhou Institute of Technology
Current assignee: Zhangzhou Institute of Technology
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-07-03
Anticipated expiration: 2029-11-15

Abstract

The utility model provides a portable indoor formaldehyde detection device, which comprises a gas acquisition system, an AD converter, a central controller, an alarm system, a DA converter, an exhaust system, a wireless communication module and a display terminal; the gas acquisition system performs one-way signal transmission with the central controller through the AD converter; the central controller carries out bidirectional signal transmission with the display terminal through the wireless communication module; the central controller controls the starting of the alarm system; the central controller is in signal transmission with the exhaust system through a DA converter; and the display terminal receives and processes the data transmitted by the central controller. The utility model discloses a portable indoor formaldehyde detection device can realize monitoring and reporting to the police simultaneously a plurality of monitoring point formaldehyde gas concentration in room, and when the formaldehyde gas concentration of certain indoor region exceeded the warning and set up the restriction, the alarm that corresponds with it sent the warning sound, and the indoor personnel of being convenient for in time know and handle.

Description

Portable indoor formaldehyde detection device

Technical Field

The utility model relates to an indoor air quality detects technical field, particularly, relates to a portable indoor formaldehyde detection device.

Background

The living standard of people is continuously improved, and the requirement for living is higher and higher. At present, most of decoration materials are cementing materials or paint and the like, and most of the materials can release toxic substances such as benzene, toluene, xylene, formaldehyde and the like. The concentrations of benzene, toluene and xylene are high and the concentration of formaldehyde is low in a short time during decoration; however, the concentration of benzene, toluene and xylene gradually decreases and the concentration of formaldehyde tends to increase with the passage of time, and the substances can seriously affect the health of human bodies. With the health emphasis of people and the rise of home decoration industry, the detection of typical pollutants is also one of the key points of current research. The formaldehyde has the characteristics of lasting harm and serious consequences, so that most of the detection in the market at present aims at the formaldehyde. The national standard methods for formaldehyde analysis can be divided into two major types, namely spectrophotometry and gas chromatography, but the two types of methods need to collect gas samples on a monitoring site and return the gas samples to a laboratory for analysis, so that the analysis period is long, the cost is high, the steps are complicated, and the condition of indoor air formaldehyde pollution cannot be reflected in real time. If the measurement is to be fast and portable, sensor measurement can be used, and the current portable measuring instruments used in the market are electrochemical sensors.

Formaldehyde testers and toluene testers are widely available on the market, and the testers are usually separated independently. Taking a formaldehyde tester as an example, most of the formaldehyde testers sold on the market currently utilize an electrochemical Sensor of DART Sensor company, but the output current of the electrochemical Sensor is only nA level, the signal is weak, the electrochemical Sensor is easily interfered by the outside, the price is expensive, and the low cost is difficult to achieve. Meanwhile, the sensor cannot effectively store data when measuring data, does not have a wireless communication mode, and is complex in wiring, high in cost, and poor in expansibility and mobility. Moreover, the real-time display of the processing of the test data does not provide an effective reference for the quality analysis and judgment of the living space. In view of the above disadvantages, it is a significant task to develop a new monitor that is fast, continuous, automatic, and inexpensive.

Disclosure of Invention

In order to solve the problem that the formaldehyde detection data sensitivity among the above-mentioned prior art is low, can not real-time processing data, can not wireless communication, the utility model provides a portable indoor formaldehyde detection device.

The technical scheme of the utility model is that: a portable indoor formaldehyde detection device comprises a gas acquisition system, an AD converter, a central controller, an alarm system, a DA converter, an exhaust system, a wireless communication module and a display terminal; the gas acquisition system performs one-way signal transmission with the central controller through the AD converter; the central controller carries out bidirectional signal transmission with the display terminal through the wireless communication module; the central controller controls the starting of the alarm system; the central controller is in signal transmission with the exhaust system through a DA converter; and the display terminal receives and processes the data transmitted by the central controller.

Further, the gas collection system comprises a plurality of formaldehyde gas sensors, and the alarm system comprises a plurality of audible and visual alarms; the formaldehyde gas sensors are in one-to-one correspondence with the audible and visual alarms, and when the concentration detected by one formaldehyde gas sensor exceeds an alarm value, the corresponding audible and visual alarm gives an alarm.

Furthermore, the monitoring range of the formaldehyde gas sensor is 0-100 ppm, the resolution is less than or equal to 1ppm, and the response time is less than or equal to 35 s.

Further, the plurality of formaldehyde gas sensors are dispersedly arranged in a plurality of areas in the room.

Further, the display terminal is a mobile phone or a computer.

Further, the wireless communication module and the display terminal perform signal transmission through GSM or CDMA or LTE or WiFi.

Furthermore, formaldehyde monitoring system software is installed in the display terminal, and the formaldehyde monitoring system can realize the functions of formaldehyde concentration dynamic curve display, historical data query, exhaust system starting and alarm reminding.

Further, the central controller is an MSP430 single chip microcomputer, and the formaldehyde gas sensor is a nano sensor.

Furthermore, the formaldehyde gas sensor is connected into a gas collection system in a constant-current mode.

Further, the central controller supplies power through commercial power or a storage battery; the formaldehyde gas sensor is powered by a battery.

Compared with the prior art, the beneficial effects of the utility model are that:

1) the utility model discloses a portable indoor formaldehyde detection device can realize monitoring and reporting to the police simultaneously a plurality of monitoring point formaldehyde gas concentration in room, and when the formaldehyde gas concentration of certain indoor region exceeded the warning and set up the restriction, the alarm that corresponds with it sent the warning sound, and the indoor personnel of being convenient for in time know and handle.

2) The utility model discloses a portable indoor formaldehyde detection device can pass to display terminal through the wireless network with the gas concentration who gathers and carry out the linear data fitting, and then realizes functions such as dynamic curve demonstration, historical data inquiry and warning.

3) The portable indoor formaldehyde detection device of the utility model adopts the nanometer sensor, can reach the high-precision acquisition circuit of 10uA grade signals, and ensures the accuracy and the sensitivity of data; the sensor is connected in a constant current mode, so that the power consumption can be as low as tens of microwatts; meanwhile, the chip which does not work is dormant by utilizing program optimization, so that the power consumption of spare elements is reduced, and the service life and the efficiency of the product are improved.

4) The utility model discloses a portable indoor formaldehyde detection device, which utilizes the wireless communication technology to realize the data communication and information sharing between the equipment and the terminal; therefore, the user can check the test result through a computer or a mobile phone.

Drawings

FIG. 1 is a schematic structural view of the portable indoor formaldehyde detecting device of the present invention;

the reference numbers are as follows: 1. a formaldehyde gas sensor; 2. an AD converter; 3. a central controller; 4. an alarm system; 5. a DA converter; 6. an exhaust system; 7. a wireless communication module; 8. and displaying the terminal.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Example 1

As shown in fig. 1, a portable indoor formaldehyde detection device comprises a gas collection system 1, an AD converter 2, a central controller 3, an alarm system 4, a DA converter 5, an exhaust system 6, a wireless communication module 7, and a display terminal 8; the gas acquisition system 1 performs one-way signal transmission with the central controller 3 through the AD converter 2; the central controller 3 performs bidirectional signal transmission with the display terminal 8 through the wireless communication module 7; the central controller 3 controls the starting of the alarm system 4; the central controller 3 performs signal transmission with the exhaust system 6 through the DA converter 5; the display terminal 8 receives and processes the data transmitted from the central controller 3.

The gas acquisition system 1 comprises a plurality of formaldehyde gas sensors, and the alarm system 4 comprises a plurality of audible and visual alarms; the formaldehyde gas sensors are in one-to-one correspondence with the audible and visual alarms, and when the concentration detected by one formaldehyde gas sensor exceeds an alarm value, the corresponding audible and visual alarm gives an alarm.

In this example, the central controller 3 is an MSP430 single chip microcomputer, and the formaldehyde gas sensor is a nanosensor. The plurality of formaldehyde gas sensors are dispersedly arranged in a plurality of areas in the room. The monitoring range of the formaldehyde gas sensor is 0-100 ppm, the resolution is less than or equal to 1ppm, and the response time is less than or equal to 35 s. The wireless communication module 7 and the display terminal 8 perform signal transmission through GSM or CDMA or LTE or WiFi. The display terminal 8 is a mobile phone or a computer. The display terminal 8 is internally provided with formaldehyde monitoring system software, and the formaldehyde monitoring system can realize the functions of formaldehyde concentration dynamic curve display, historical data query, starting of an exhaust system and alarm reminding. The formaldehyde gas sensor is connected into the gas collection system 1 in a constant current mode. The central controller 3 is powered by commercial power or a storage battery; the formaldehyde gas sensor is powered by a battery.

The utility model discloses a portable indoor formaldehyde detection device can realize monitoring and reporting to the police simultaneously a plurality of monitoring point formaldehyde gas concentration in room, and when the formaldehyde gas concentration of certain indoor region exceeded the warning and set up the restriction, the alarm that corresponds with it sent the warning sound, and the indoor personnel of being convenient for in time know and handle.

While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. The utility model provides a portable indoor formaldehyde detection device which characterized in that: the gas alarm system comprises a gas acquisition system (1), an AD converter (2), a central controller (3), an alarm system (4), a DA converter (5), an exhaust system (6), a wireless communication module (7) and a display terminal (8); the gas collection system (1) is in one-way signal transmission with the central controller (3) through the AD converter (2); the central controller (3) performs bidirectional signal transmission with the display terminal (8) through the wireless communication module (7); the central controller (3) controls the starting of the alarm system (4); the central controller (3) is in signal transmission with an exhaust system (6) through a DA converter (5); and the display terminal (8) receives and processes the data transmitted by the central controller (3).

2. The portable indoor formaldehyde detecting device according to claim 1, characterized in that: the gas collection system (1) comprises a plurality of formaldehyde gas sensors, and the alarm system (4) comprises a plurality of audible and visual alarms; the formaldehyde gas sensors are in one-to-one correspondence with the audible and visual alarms, and when the concentration detected by one formaldehyde gas sensor exceeds an alarm value, the corresponding audible and visual alarm gives an alarm.

3. The portable indoor formaldehyde detecting device according to claim 2, characterized in that: the monitoring range of the formaldehyde gas sensor is 0-100 ppm, the resolution is less than or equal to 1ppm, and the response time is less than or equal to 35 s.

4. The portable indoor formaldehyde detecting device according to claim 2, characterized in that: the plurality of formaldehyde gas sensors are dispersedly arranged in a plurality of areas in the room.

5. The portable indoor formaldehyde detecting device according to claim 1, characterized in that: the display terminal (8) is a mobile phone or a computer.

6. The portable indoor formaldehyde detecting device according to claim 1, characterized in that: the wireless communication module (7) and the display terminal (8) carry out signal transmission through GSM or CDMA or LTE or WiFi.

7. The portable indoor formaldehyde detecting device according to claim 1, characterized in that: the formaldehyde monitoring system is characterized in that formaldehyde monitoring system software is installed in the display terminal (8), and the formaldehyde monitoring system can realize the functions of displaying a formaldehyde concentration dynamic curve, inquiring historical data, starting an exhaust system and alarming and reminding.

8. The portable indoor formaldehyde detecting device according to claim 2, characterized in that: the central controller (3) is an MSP430 single chip microcomputer, and the formaldehyde gas sensor is a nano sensor.

9. The portable indoor formaldehyde detecting device according to claim 8, wherein: the formaldehyde gas sensor is connected into the gas collection system (1) in a constant-current mode.

10. The portable indoor formaldehyde detecting device according to claim 9, wherein: the central controller (3) is powered by commercial power or a storage battery; the formaldehyde gas sensor is powered by a battery.