CN202793980U - Distributed wireless dust measuring instrument - Google Patents

Abstract

The utility model relates to a distributed wireless dust measuring instrument, which comprises a host computer and a plurality of lower computers. The host computer includes a first microprocessor, a display module, a button module, an alarm module, an SD card memory and a wireless receiving module. module, button module, alarm module, SD card memory and wireless receiving module are all connected to the first microprocessor, and the lower computer includes the second microprocessor, dust signal detection module, A/D converter, power supply module, temperature and humidity signal The detection module and the wireless transmission module, the power supply module are respectively electrically connected to the wireless transmission module, the dust signal detection module and the second microprocessor, the dust signal detection module is connected to the second microprocessor through the A/D converter, the wireless transmission module and the second microprocessor The temperature and humidity signal detection modules are all connected to the second microprocessor, and the hardware configurations of the multiple lower computers are the same, and they are respectively placed in multiple areas to be measured. The utility model can measure the dust and temperature and humidity data in multiple areas at the same time. Its structure is simple, easy to use, and has good visibility. Multi-point measurement, good scalability.

Description

Distributed Wireless Dust Meter

Technical field:

The utility model relates to the technical field of instrument design, in particular to a distributed wireless dust measuring instrument.

Background technique:

With the development of industry and agriculture, the hazards of dust are becoming more and more serious. Excessively large respirable dust particles in the atmosphere will cause adverse effects on human health. In addition to the hazards of respirable dust to the human body, some combustible dusts are also explosive. Dust concentration monitoring is an important measure to prevent dust hazards. After years of research and development, various types of dust measuring instruments and measurement methods are currently developed and produced at home and abroad, and the methods of expressing dust concentration are also different. According to their principles, they can be roughly divided into two categories: sampling method and non-sampling methods. The sampling method is to extract some representative dust-containing gas samples from the area to be tested and send them to the subsequent analysis and measurement system to measure the concentration and particle size of dust. The basic working principle is to collect a certain volume of air from the dust-containing area. Dust-containing samples, filter or separate the dust particles contained in them, calculate the dust concentration of the gas according to the collected dust mass and volume, and at the same time, use various particle size measurements and other analysis tests to measure and analyze the filtered dust samples together. The average particle size, particle size distribution, physical characteristics, and chemical composition of dust particles can be further obtained. The sampling method is the most basic and simple in principle, and can obtain relatively reliable results. The disadvantages of the sampling method are also obvious, and the requirements for sampling operations are high. The sampling method is point measurement, which can only collect gas samples at a certain point each time. In order to obtain the average concentration value of dust in the entire dust-containing area, it is necessary to measure and average at multiple points, which will undoubtedly greatly increase Measurement workload, and often requires manual operation, low degree of automation. The non-sampling method is to use the physical and optical characteristics of dust to directly measure without sampling. The methods of dust emission concentration and particle size mainly include blackness method, scattering method, and light transmission method. The non-sampling method can realize online measurement of dust emission concentration, some of which can automatically and continuously monitor dust emission, and others can give the concentration and particle size of dust at the same time, especially the light scattering method does not change the physical and chemical properties of floating dust. It has the advantages of high precision and the ability to monitor the dust concentration in the air in real time, so the application prospect of this type of method is relatively broad.

Among the various monitoring instruments and means currently available in our country, except for the relatively popular application of sampling method, the instruments of other methods are still at a relatively backward level, and it is difficult to meet the growing demands of environmental protection and on-line monitoring of safety production. Therefore, the development of a simple, efficient, accurate and practical dust meter suitable for engineering applications not only has great practical significance and application prospects, but also has high social value and economic benefits. At the same time, the application of wireless communication technology to dust measurement In the instrument, the sensor collects the dust information of each measurement point in real time, and after processing by the processor, the data is transmitted to the monitoring terminal through the wireless data acquisition system. The operator can select the test point on the handheld terminal and process the received data on the handheld terminal. Displayed on the display screen of the terminal, so as to achieve the purpose of integration, low cost and easy operation.

Invention content:

The technical problem to be solved by the utility model is: to provide a distributed wireless dust measuring instrument, which can automatically monitor the dust concentration, temperature and humidity in multiple areas by wireless means.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a distributed wireless dust measuring instrument, including a host computer and a plurality of lower computers, and the host computer includes a first microprocessor, a display module, a key module, an alarm module, SD Card memory and wireless receiving module, display module, button module, alarm module, SD card memory and wireless receiving module are all connected with the first microprocessor, and the lower computer includes the second microprocessor, dust signal detection module, A/D conversion device, power supply module, temperature and humidity signal detection module and wireless transmission module, the power supply module is electrically connected to the wireless transmission module, dust signal detection module and the second microprocessor respectively, and the dust signal detection module passes the A/D converter and the second microprocessor The processors are connected, the wireless transmission module and the temperature and humidity signal detection module are connected to the second microprocessor, and the hardware configurations of the multiple lower computers are the same, and they are respectively placed in multiple areas to be measured.

Preferably, the alarm module is a voice alarm.

Preferably, the display module is an LCD display.

Preferably, the SD card memory is connected to the first microprocessor in SPI bus mode.

Preferably, the dust signal detection module is a dust sensor.

Preferably, the power module is a lithium ion battery.

Preferably, the temperature and humidity signal detection module is a digital temperature and humidity sensor.

Preferably, the wireless transmitting module is matched with the wireless receiving module and communicates wirelessly.

Compared with the prior art, the utility model has the advantages that: it can measure the dust and temperature and humidity data in multiple areas at the same time. Its structure is simple, easy to use, and has good visibility. The computer and multiple lower computers can be moved at any time, which is convenient for multi-point measurement and has good scalability.

Description of drawings:

Fig. 1 is the structural block diagram of the distributed wireless dust measuring instrument described in the utility model;

Fig. 2 is a structural block diagram of the lower computer described in the present invention.

Detailed ways:

Below in conjunction with accompanying drawing, the utility model is further described.

As a kind of embodiment of the present utility model, referring to Fig. 1 and Fig. 2, the utility model has a host computer and a plurality of lower computers, and the host computer includes a first microprocessor, a display module, a key module, an alarm module, and an SD card memory And the wireless receiving module, display module, key module, alarm module, SD card memory and wireless receiving module are all connected with the first microprocessor, the lower computer includes the second microprocessor, dust signal detection module, A/D converter, Power supply module, temperature and humidity signal detection module and wireless transmission module, the power supply module is electrically connected to the wireless transmission module, dust signal detection module and the second microprocessor respectively, and the dust signal detection module passes the A/D converter and the second microprocessor connected, the wireless transmitting module and the temperature and humidity signal detection module are connected to the second microprocessor, and the hardware configurations of the multiple lower computers are the same, and they are respectively placed in multiple areas to be measured. The alarm module is a voice alarm. The display module is an LCD display. The SD card memory adopts the SPI bus mode to be connected with the first microprocessor. The dust signal detection module is a dust sensor. The power module is a lithium-ion battery. The temperature and humidity signal detection module is a digital temperature and humidity sensor. The wireless transmitting module matches with the wireless receiving module and communicates wirelessly therebetween.

When in use, place multiple lower-position computers in multiple areas to be measured, and multiple lower-position computers convert the measured dust data into analog electrical signals through dust sensors, and then convert the analog electrical signals into microprocessors through the A/D converter. At the same time, the temperature and humidity data is collected by the digital temperature and humidity sensor, and then the microprocessor transmits all the measured data to the wireless transmission module, and then stimulates the wireless transmission module to send the data. After the upper computer is powered on, put the wireless receiving module in the receiving state, and wait for the lower computer to send data. When it detects that the lower computer has data to send and the carrier frequency matches the address, the upper computer wireless receiving module starts to receive the data sent by the corresponding lower computer. After receiving the data, the corresponding measurement results are processed and stored in the SD card memory (the SD card memory is used to save the real-time measurement data, and then it can be opened by a computer to analyze all the measurement data, fit the historical curve, etc.), and at the same time in the LCD displayed on the screen. The button module can set the alarm threshold of dust and temperature and humidity at each measurement point. When the data of a certain monitoring point exceeds the standard, the system will automatically start the alarm module to give a voice alarm.

Preferably, the first microprocessor and the second microprocessor select AT89C52 or STC89C52 single-chip microcomputer, the dust signal detection module selects dust sensor PD20V, the temperature and humidity signal detection module selects digital temperature and humidity sensor SHT11, A/D conversion The TLC1549 chip is selected for the device, the NRF905 chip is selected for the wireless transmitting module and the wireless receiving module, the LCD12864 liquid crystal display is selected for the display module, and the ISD1420 voice chip is selected for the alarm.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model . Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. distributed wireless dust gauge, comprise a host computer and a plurality of slave computer, it is characterized in that: described host computer comprises first microprocessor, display module, key-press module, alarm module, SD card memory and wireless receiving module, described display module, key-press module, alarm module, the SD card memory all links to each other with first microprocessor with wireless receiving module, described slave computer comprises the second microprocessor, the dust signal detection module, A/D converter, power module, temperature-humidity signal detection module and wireless transmitter module, described power module is respectively at wireless transmitter module, dust signal detection module and the second microprocessor are electrically connected, described dust signal detection module links to each other with the second microprocessor by A/D converter, described wireless transmitter module all links to each other with the second microprocessor with the temperature-humidity signal detection module, the hardware configuration of described a plurality of slave computers is identical, is placed on respectively multi-disc zone to be measured.

2. distributed wireless dust gauge according to claim 1, it is characterized in that: described alarm module is phonetic alarm.

3. distributed wireless dust gauge according to claim 1, it is characterized in that: described display module is LCD display.

4. distributed wireless dust gauge according to claim 1 is characterized in that: described SD card memory adopts the spi bus pattern to link to each other with first microprocessor.

5. distributed wireless dust gauge according to claim 1, it is characterized in that: described dust signal detection module is dust sensor.

6. distributed wireless dust gauge according to claim 1, it is characterized in that: described power module is lithium ion battery.

7. distributed wireless dust gauge according to claim 1, it is characterized in that: described temperature-humidity signal detection module is digital temperature-humidity sensor.

8. distributed wireless dust gauge according to claim 1 is characterized in that: described wireless transmitter module and wireless receiving module be complementary and between wireless telecommunications.

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