CN204116182U

CN204116182U - The pick-up unit of a kind of pin-point accuracy PM2.5

Info

Publication number: CN204116182U
Application number: CN201420528789.3U
Authority: CN
Inventors: 李洪星; 朱雪华
Original assignee: SUZHOU FULAIXI INTELLIGENT TECHNOLOGY Co Ltd
Current assignee: SUZHOU FULAIXI INTELLIGENT TECHNOLOGY Co Ltd
Priority date: 2014-09-16
Filing date: 2014-09-16
Publication date: 2015-01-21
Anticipated expiration: 2024-09-16

Abstract

The utility model discloses the pick-up unit of a kind of pin-point accuracy PM2.5, comprise: dust sensor, it comprises the first dust sensor (1) and the second dust sensor (2), and the first dust sensor (1) and the second dust sensor (2) are respectively used to obtain particle diameter and are greater than the dust granules content that 1um and particle diameter be greater than 2.5um; Single-chip microcomputer (3), it is connected with the first dust sensor (1) and the second dust sensor (2) respectively; WiFi module (4), it is connected with single-chip microcomputer (3), for receiving the data after single-chip microcomputer (3) process, and is sent to server by network.The pick-up unit of pin-point accuracy PM2.5 described in the utility model can obtain the value of PM2.5 in air fast and accurately in real time, simplify collecting flowchart, accurately record the dust content in extraneous real air, and by WiFi module, data can be sent to server, be applicable to the popularization in extensive Internet of Things field.

Description

The pick-up unit of a kind of pin-point accuracy PM2.5

Technical field

The utility model relates to air quality collection and monitoring field, is specially the pick-up unit of a kind of pin-point accuracy PM2.5.

Background technology

PM2.5 is also known as fine particle, and refer to that in surrounding air, aerodynamics equivalent diameter is less than or equal to the particle of 2.5 microns, its aerial content concn is higher, just represents air pollution more serious.PM2.5 particle diameter is little, containing a large amount of poisonous and harmful substances and atmospheric residence time is long, fed distance is far away; Meanwhile, fine particle is larger to other pollutants of the hazard ratio of health, because diameter is less, the position entering respiratory tract is darker.The particle of 10 micron diameters is deposited on the upper respiratory tract usually, the be deep into bronchiole of less than 2 microns and alveolar.After fine particle enters human body alveolar, directly affect the ventilatory function of lung, make body easily be in anaerobic condition, therefore the impact of fine particle on health and atmosphere quality is very large.

The detection method of existing PM2.5 has: gravimetric method, micro-oscillating balance method, β rays method, optical principle sensor method etc.Wherein the particle filtering being greater than 2.5 microns in air is mainly removed by separating component by existing sensor method, and the endpiece of particle separation parts is connected with the inlet end of PM2.5 detecting sensor, thus realizes the measurement to the PM2.5 parameter in air.But, when air-flow for a long time continuous be separated by filter membrane time, the material that filter membrane collects can cause the loss of volatility and half volatile material along with the change of air-flow and temperature; Determine by the pore-size of filter membrane or dust board completely the filter effect of different-grain diameter particle, simultaneously through separating component, composition of air changes, and what sensor recorded is not real-time PM2.5 value.

Utility model content

For above-mentioned technical matters, the utility model discloses the pick-up unit of a kind of pin-point accuracy PM2.5, comprise: dust sensor, it comprises the first dust sensor 1 and the second dust sensor 2, and described first dust sensor 1 and the second dust sensor 2 are respectively used to obtain particle diameter and are greater than the dust granules content that 1um and particle diameter be greater than 2.5um; Single-chip microcomputer 3, it is connected, for the data message of real-time reception dust granules content with described first dust sensor 1 and the second dust sensor 2 respectively; WiFi module 4, it is connected with described single-chip microcomputer 3, for receiving the data after the process of described single-chip microcomputer 3, and is sent to server by network.

The beneficial effects of the utility model are that described device is by use two dust sensor determination dust granules scopes, the value of PM2.5 in air can be obtained fast and accurately in real time, simplify collecting flowchart, eliminate air separation mechanism, accomplished survey air and extraneous real air, reduce the error introduced because being separated air; And utilize the mode that two or more dust sensor combines, effectively maintain the former state of surveyed air, make surveyed data more accurate; And by the setting of WiFi module, just data are sent to server very easily, the characteristic of its integrated and accessible network is applicable to the large-scale promotion in Internet of Things field.

Accompanying drawing explanation

Fig. 1 is the structural representation of the pick-up unit of pin-point accuracy PM2.5 described in the utility model;

Fig. 2 is the connection diagram of the pick-up unit of pin-point accuracy PM2.5 described in the utility model.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail, can implements according to this with reference to instructions word to make those skilled in the art.

As shown in the figure, the utility model discloses the pick-up unit of a kind of pin-point accuracy PM2.5, comprise: dust sensor, it comprises the first dust sensor 1 and the second dust sensor 2, and described first dust sensor 1 and the second dust sensor 2 are respectively used to obtain particle diameter and are greater than the dust granules content that 1um and particle diameter be greater than 2.5um; Single-chip microcomputer 3, it is connected, for the data message of real-time reception dust granules content with described first dust sensor 1 and the second dust sensor 2 respectively; WiFi module 4, it is connected with described single-chip microcomputer 3, for receiving the data after the process of described single-chip microcomputer 3, and is sent to server by network.

Specifically tell about the pick-up unit of pin-point accuracy PM2.5 described in the utility model below.

The model of the first dust sensor 1 described in the utility model and the second dust sensor 2 is PPD42NJ, has 5 pins, is respectively used to:

1: ground connection;

2: adjustable accuracy output pin;

3:5V power supply;

4: acquiescence precision (1um or 2.5um) output pin;

5: precision controlling pin (unsettled acquiescence precision is 1um).

The connected mode of the first dust sensor 1 and the second dust sensor 2 is as follows:

1. the first dust sensor 1:

Pin 5 is unsettled, and dust sensor acquiescence precision is 1um, then can detect that in air, particle size diameter is greater than the powder dust particle of 1um; Output pin 4 is connected single-chip microcomputer.

2. the second dust sensor 2:

At the indirect resistance R of pin 1 and pin 5, the measuring accuracy of the second dust sensor 2 is adjusted to 2.5um, then can detects that in air, particle size diameter is greater than the powder dust particle of 2.5um; Output pin 2 is connected single-chip microcomputer.

Testing process:

First, the precision of the first dust sensor 1 and the second dust sensor 2 is adjusted to 1um and 2.5um respectively, make the first dust sensor 1 and the second dust sensor 2 can obtain particle diameter respectively and be greater than the dust granules content data that 1um and particle diameter be greater than 2.5um, then the first dust sensor 1 and the second dust sensor 2 are connected with single-chip microcomputer 3 respectively, single-chip microcomputer 3 can the data message of real-time reception dust granules content;

Then, starter gear, single-chip microcomputer 3 obtains numerical value PM1 and PM2 that the collection of the first dust sensor 1 and the second dust sensor 2 is returned, and then draws PM2.5=| PM1-PM2 | dust number, through calibrating the concrete numerical value finally obtaining PM2.5;

Finally, the data after process are sent to server by the WiFi module 4 be connected with single-chip microcomputer 3 by single-chip microcomputer 3.

Device described in the utility model is by use two dust sensor determination dust granules scopes, the value of PM2.5 in air can be obtained fast and accurately in real time, simplify collecting flowchart, eliminate air separation mechanism, accomplished survey air and extraneous real air, reduce the error introduced because being separated air; And utilize the mode that two or more dust sensor combines, effectively maintain the former state of surveyed air, make surveyed data more accurate; And by the setting of WiFi module, just data are sent to server very easily, the characteristic of its integrated and accessible network is applicable to the large-scale promotion in Internet of Things field; Simultaneously, this device has extensibility, by organizing the dust sensor combination of different accuracy more, can be used for detecting the granule densities such as PM1.0, PM5, PM10, and measurement procedure is simple, measuring accuracy is high, and simultaneity factor integrated level is high, there is WiFi module and external WiFi interface, Internet of Things field can be widely used in.

Although embodiment of the present utility model is open as above, but it is not restricted to listed in instructions and embodiment utilization, it can be applied to various applicable field of the present utility model completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the utility model is not limited to specific details and illustrates here and the legend described.

Claims

1. a pick-up unit of pin-point accuracy PM2.5, is characterized in that, comprising:

Dust sensor, it comprises the first dust sensor (1) and the second dust sensor (2), and described first dust sensor (1) and the second dust sensor (2) are respectively used to obtain particle diameter and are greater than the dust granules content that 1um and particle diameter be greater than 2.5um;

Single-chip microcomputer (3), it is connected, for the data message of real-time reception dust granules content with described first dust sensor (1) and the second dust sensor (2) respectively;

WiFi module (4), it is connected with described single-chip microcomputer (3), for receiving the data after described single-chip microcomputer (3) process, and is sent to server by network.