Data acquisition system based on Internet of Things

Abstract

The utility model provides a data acquisition system based on Internet of Things, comprising an environmental parameter acquisition module, a data processing device, a data storage module, a wireless transmission module and a man-machine interaction system, the environmental parameter acquisition module, the data storage module, the wireless transmission module and the man-machine interaction system are all electrically connected with the data processing device; the environmental parameter acquisition module comprises a PM2.5 sensor, a temperature sensor, a humidity sensor, a smoke sensor and a combustible gas sensor; the data processing device comprises a box body; a power supply, an analog signal preprocessing board, a signal acquisition control board, a parallel signal processing board and a display control and storage unit are arranged in the box body; mutual interference of analog and digital parts can be well reduced through separate supply of the analog power supply and the digital power supply, in addition, the modular design is adopted, the reliability of the system is improved, and high-reliability, safe and credible data acquisition and transmission are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of Internet of Things, and in particular relates to a data acquisition system based on Internet of Things. Background Art

[0002] In recent years, my country has vigorously strengthened the information construction of environmental supervision business, and has made a lot of exploration and efforts in environmental quality monitoring, automatic monitoring of pollution sources, environmental emergency response, etc. Automatic monitoring of the environment requires automatic, continuous, real-time, and all-weather monitoring and monitoring of the quality of various environmental factors, but the existing monitoring system is not reliable. Summary of the invention

[0003] In view of this, the utility model aims to overcome the shortcomings of the above-mentioned problems in the prior art, proposes a data acquisition system based on the Internet of Things, and proposes a highly reliable and secure data acquisition system based on environmental data collection and transmission of the Internet of Things.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] A data acquisition system based on the Internet of Things, comprising an environmental parameter acquisition module, a data processing device, a data storage module, a wireless transmission module and a human-computer interaction system, wherein the environmental parameter acquisition module, the data storage device, the wireless transmission module and the human-computer interaction system are all electrically connected to the data processing device;

[0006] The environmental parameter acquisition module includes a PM2.5 sensor, a temperature sensor, a humidity sensor, a smoke sensor, and a combustible gas sensor;

[0007] The data processing device comprises a box, in which a power supply, an analog signal preprocessing board, a signal acquisition control board, a parallel signal processing board, a display control and storage unit are arranged;

[0008] The analog signal preprocessing board includes two circuit boards, the parallel signal processing board includes two independent processing boards, the signal acquisition control board and the power supply part are each a circuit board, the display control and storage unit is directly connected to the signal acquisition control board, and the power supply, analog signal preprocessing board, signal acquisition control board, and parallel signal processing board are all connected through a backplane;

[0009] The analog signal preprocessing board is used to complete the buffering, amplification, filtering and linear isolation of the input signal, including an operational amplifier circuit, a low-pass filter, a high-pass filter, a buffer amplifier, and a linear optocoupler isolation circuit connected in sequence;

[0010] The signal acquisition control board includes an analog-to-digital converter, a first processor, an optical fiber module, and an interface unit, and the analog-to-digital converter, the optical fiber module, and the interface unit are all connected to the first processor;

[0011] The parallel signal processing board includes a second processor, FLASH, and SDRAM, and the FLASH and SDRAM are both connected to the second processor.

[0012] Furthermore, the signal acquisition control board communicates with the human-computer interaction system via optical fiber.

[0013] Furthermore, the power supply, analog signal preprocessing board, signal acquisition control board, parallel signal processing board and backplane are connected via a CPIC slot.

[0014] Furthermore, the signal acquisition control board and the parallel signal processing board are interconnected via an I / O interface of the FPGA.

[0015] Furthermore, the power board includes four outputs, including three digital power supplies, which are respectively supplied to the signal acquisition control board and two parallel signal processing boards, and one analog power supply, which is supplied to two analog signal preprocessing boards. The digital power supply adopts a PWM switching power supply, and the analog power supply adopts an LDO power supply.

[0016] Furthermore, the low-pass filter is constructed by a second-order filter consisting of three operational amplifiers.

[0017] Furthermore, the linear optocoupler isolation circuit adopts a linear optocoupler chip with a signal of IL388, which includes an infrared light LED, a feedback photodiode and an emission light diode.

[0018] Furthermore, the first processor is a single chip microcomputer.

[0019] Furthermore, the second processor is a single chip microcomputer.

[0020] Compared with the prior art, the data acquisition system based on the Internet of Things described in the utility model has the following advantages:

[0021] The power supply of the utility model adopts a high-efficiency PWM power supply to power the digital part, and uses a small ripple LDO power supply chip to power the analog part. The separate supply of analog and digital power supplies can effectively reduce the mutual interference between the analog and digital parts. In addition, a modular design is adopted to increase the reliability of the system and realize highly reliable and secure data acquisition and transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the principle of a data acquisition system based on the Internet of Things of the present utility model;

[0024] Figure 2 This is a schematic diagram of the principle of the data processing device of the utility model;

[0025] Figure 3 This is a schematic diagram of the principle of the analog signal preprocessing board of the utility model;

[0026] Figure 4 This is a schematic diagram of the principle of the signal acquisition control board of the utility model;

[0027] Figure 5 This is a schematic diagram of the principle of the parallel signal processing board of the utility model. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0029] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0031] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0032] like Figure 1 As shown, the utility model provides a data acquisition system based on the Internet of Things, including an environmental parameter acquisition module, a data processing device, a data storage module, a wireless transmission module and a human-computer interaction system, wherein the environmental parameter acquisition module, the data storage device, the wireless transmission module and the human-computer interaction system are all electrically connected to the data processing device, and the data is transmitted to the server end through the wireless transmission module;

[0033] The environmental parameter acquisition module includes a PM2.5 sensor, a temperature sensor, a humidity sensor, a smoke sensor, and a combustible gas sensor, which are used to collect PM2.5 data, temperature data, humidity data, smoke concentration data, and combustible gas concentration data of the environment, and send them to a data processing device;

[0034] like Figure 2 As shown, the data processing device includes a box body, in which a power supply, an analog signal preprocessing board, a signal acquisition control board, a parallel signal processing board, a display control and storage unit are arranged;

[0035] The analog signal preprocessing board includes two circuit boards, the parallel signal processing board includes two independent processing boards, the signal acquisition control board and the power supply part are each a circuit board, the display control and storage unit is directly connected to the signal acquisition control board, and the power supply, analog signal preprocessing board, signal acquisition control board, and parallel signal processing board are all connected through a backplane;

[0036] like Figure 3 As shown, the analog signal preprocessing board is used to complete the buffering, amplification, filtering and linear isolation of the input signal, including an operational amplifier circuit, a low-pass filter, a high-pass filter, a buffer amplifier, and a linear optocoupler isolation circuit connected in sequence;

[0037] like Figure 4 As shown, the signal acquisition control board includes an analog-to-digital converter, a first processor, an optical fiber module, and an interface unit, and the analog-to-digital converter, the optical fiber module, and the interface unit are all connected to the first processor;

[0038] like Figure 5 As shown, the parallel signal processing board includes a second processor, FLASH, and SDRAM, and the FLASH and SDRAM are both connected to the second processor.

[0039] Specifically, the signal acquisition control board communicates with the human-computer interaction system via optical fiber.

[0040] Specifically, the power supply, analog signal preprocessing board, signal acquisition control board, parallel signal processing board and backplane are connected via a CPIC slot.

[0041] Specifically, the signal acquisition control board and the parallel signal processing board are interconnected via an I / O interface of the FPGA.

[0042] Specifically, the power board includes four outputs, including three digital power supplies, which are respectively supplied to the signal acquisition control board and two parallel signal processing boards, and one analog power supply, which is supplied to two analog signal preprocessing boards. The digital power supply adopts a PWM switching power supply, and the analog power supply adopts an LDO power supply.

[0043] Specifically, the low-pass filter is constructed by a second-order filter consisting of three operational amplifiers.

[0044] Specifically, the linear optocoupler isolation circuit adopts a linear optocoupler chip with a signal of IL388, which includes an infrared light LED, a feedback photodiode and an emission photodiode.

[0045] Specifically, the first processor is a single chip microcomputer.

[0046] Specifically, the second processor is a single chip microcomputer.

[0047] When the utility model is working, the PM2.5 data, temperature data, humidity data, smoke concentration data and combustible gas concentration data of the environment are collected through the PM2.5 sensor, temperature sensor, humidity sensor, smoke sensor and combustible gas sensor, and sent to the data processing device, the processing device processes the signal and transmits it to the human-computer interaction system and the server. The various parts of the system of the utility model are divided into independent modular panels, which are connected through a backplane, and each part has a spare board to facilitate the replacement and upgrade of each part. Each power supply of the power board has a spare module, and the independent power supplies do not affect each other, which is safe and reliable.

[0048] All matters not mentioned above are prior art.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A data acquisition system based on the Internet of Things, characterized in that: It includes an environmental parameter acquisition module, a data processing device, a data storage module, a wireless transmission module and a human-computer interaction system, wherein the environmental parameter acquisition module, the data storage device, the wireless transmission module and the human-computer interaction system are all electrically connected to the data processing device; The environmental parameter acquisition module includes a PM2.5 sensor, a temperature sensor, a humidity sensor, a smoke sensor, and a combustible gas sensor; The data processing device comprises a box, in which a power supply, an analog signal preprocessing board, a signal acquisition control board, a parallel signal processing board, a display control and storage unit are arranged; The analog signal preprocessing board includes two circuit boards, the parallel signal processing board includes two independent processing boards, the signal acquisition control board and the power supply part are each a circuit board, the display control and storage unit is directly connected to the signal acquisition control board, and the power supply, analog signal preprocessing board, signal acquisition control board, and parallel signal processing board are all connected through a backplane; The analog signal preprocessing board is used to complete the buffering, amplification, filtering and linear isolation of the input signal, including an operational amplifier circuit, a low-pass filter, a high-pass filter, a buffer amplifier, and a linear optocoupler isolation circuit connected in sequence; The signal acquisition control board includes an analog-to-digital converter, a first processor, an optical fiber module, and an interface unit, and the analog-to-digital converter, the optical fiber module, and the interface unit are all connected to the first processor; The parallel signal processing board includes a second processor, FLASH, and SDRAM, and the FLASH and SDRAM are both connected to the second processor.

2. The data acquisition system based on the Internet of Things according to claim 1 is characterized in that: The signal acquisition control board communicates with the human-computer interaction system via optical fiber.

3. The data acquisition system based on the Internet of Things according to claim 1 is characterized in that: The power supply, the analog signal preprocessing board, the signal acquisition control board, the parallel signal processing board and the backboard are connected via a CPIC slot.

4. The data acquisition system based on the Internet of Things according to claim 1, characterized in that: The signal acquisition control board and the parallel signal processing board are connected to each other through the I / O interface of the FPGA.

5. The data acquisition system based on the Internet of Things according to claim 1 is characterized in that: The power board includes four outputs, including three digital power supplies, which are respectively supplied to the signal acquisition control board and two parallel signal processing boards, and one analog power supply, which is supplied to two analog signal preprocessing boards. The digital power supply adopts a PWM switching power supply, and the analog power supply adopts an LDO power supply.

6. The data acquisition system based on the Internet of Things according to claim 1, characterized in that: The low-pass filter is constructed by a second-order filter consisting of three operational amplifiers.

7. The data acquisition system based on the Internet of Things according to claim 1 is characterized in that: The linear optocoupler isolation circuit adopts a linear optocoupler chip with a signal of IL388, which includes an infrared light LED, a feedback photodiode and an emission photodiode.

8. The data acquisition system based on the Internet of Things according to claim 1, characterized in that: The first processor is a single chip microcomputer.

9. The data acquisition system based on the Internet of Things according to claim 1, characterized in that: The second processor is a single chip microcomputer.

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