CN215930948U - Water quality monitoring data acquisition device - Google Patents

Abstract

The utility model relates to a water quality monitoring data acquisition device, which comprises a microprocessor module, a GSM/GPRS communication module and a sensor module; the input end of the sensor module is connected with a detecting head, and the detecting head is immersed in the water body to be detected to obtain water quality data of the water body to be detected; the output end of the sensor module is in communication connection with the input end of the microprocessor module through an RS485 bus so as to realize the transmission and reception of water quality data; the output end of the microprocessor module is connected with the input end of the GSM/GPRS communication module, and the output end of the GSM/GPRS communication module outputs the water quality data. The GSM/GPRS communication module is added to realize the transmission of water quality data to cloud and the subsequent display and processing by taking the RS485 bus as a data transmission mode, and the system can be deployed and used at each point needing monitoring flexibly and quickly, so that the cost for acquiring data is greatly reduced.

Description

Water quality monitoring data acquisition device

Technical Field

The utility model relates to the technical field of water quality monitoring, in particular to a water quality monitoring data acquisition device.

Background

The main problems faced by China in the aspect of water quality monitoring are as follows: firstly, the number of monitoring stations is small and is often less than the number of monitored water areas, so that the water quality condition of one area is difficult to reflect on the whole. Secondly, the monitoring capability of each monitoring department is insufficient, equipment aging exists, and the sampling frequency is low. With the rapid development of computer networks, communication and automation technologies, it is of great significance to design and establish an all-dimensional water quality data acquisition system.

The signal transmission mode that present water quality monitoring system adopted is mostly AD transmission based on 232 interfaces, and the stability of system is relatively poor, and the interface uses the less strong mode communication of common place of interference killing feature, realizes that networking function is more difficult, and the associativity is not strong enough, can't accomplish the high automation of monitoring.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a water quality monitoring data acquisition device, which adopts an RS485 bus as a data transmission mode, is additionally provided with a GSM/GPRS communication module to realize the transmission of water quality data to cloud and the subsequent display and processing, can be flexibly and rapidly deployed and used at each point needing to be monitored, and greatly reduces the cost required by data acquisition.

In order to solve the technical problem, the utility model provides a water quality monitoring data acquisition device, which comprises a microprocessor module, a GSM/GPRS communication module and a sensor module; the input end of the sensor module is connected with a detecting head, and the detecting head is immersed in the water body to be detected to obtain water quality data of the water body to be detected; the output end of the sensor module is in communication connection with the input end of the microprocessor module through an RS485 bus so as to realize the transmission and reception of water quality data; the output end of the microprocessor module is connected with the input end of the GSM/GPRS communication module, and the output end of the GSM/GPRS communication module outputs the water quality data.

Preferably, an LM324 signal conditioning chip is connected between the output end of the sensor module and the input end of the micro-processing module to convert the current signal of the water quality data into a voltage signal.

Preferably, the sensor module comprises a temperature sensor, a PH sensor, a dissolved oxygen sensor, a conductivity sensor and a turbidity sensor; the temperature sensor, the PH sensor, the dissolved oxygen sensor, the conductivity sensor and the turbidity sensor are all in communication connection with the microprocessor through an RS485 bus.

Preferably, the sensor module adopts a modbus-rtu communication protocol to transmit water quality data.

Preferably, the water quality monitoring data acquisition device further comprises an LCD display screen, and the LCD display screen is welded on the microprocessor module to display the read water quality data.

Preferably, the water quality monitoring data acquisition device further comprises an upper computer terminal, and the upper computer terminal is in communication connection with the microprocessor module through a 2G network; and the upper computer terminal is connected with the output end of the GSM/GPRS communication module so as to transmit the collected water quality data to the upper computer terminal.

Preferably, the GSM/GPRS communication module uses a communication chip SIM800C, and the communication chip SIM800C is connected to an RS-232 interface of the microprocessor to realize wireless transmission of water quality data.

Preferably, the water quality monitoring data acquisition device further comprises a power supply, and the GSM/GPRS communication module and the sensor module are powered by the power supply.

Preferably, the microprocessor module is a single chip microcomputer STM32F 103.

Preferably, the crystal oscillator of the microprocessor module and the singlechip adopts 11.0592 MHz.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

1. the microprocessor module and the sensor module of the utility model realize the sending and receiving of water quality data by taking RS485 bus communication as a data transmission mode. Compared with the traditional AD transmission based on 232 interface, the method can easily realize one-to-many working mode, can realize multi-machine communication by networking on the bus, and allows hanging a plurality of transceivers on the bus. Meanwhile, the RS485 bus communication adopts a differential transmission mode, and the mode can effectively inhibit common-mode interference on an industrial field and improve the stability of the system.

2. According to the utility model, the GSM/GPRS communication module is arranged, so that the transmission of water quality data to the upper computer and subsequent display and processing can be realized, the water quality data can be flexibly and rapidly deployed and used at each point needing to be monitored, and the cost required for acquiring the data is greatly reduced.

3. The utility model has small volume and low cost, and is easy to arrange in various places and automatically collect water quality data.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a block diagram of a hardware circuit of the present invention;

fig. 2 is a schematic structural diagram of the present invention.

The specification reference numbers indicate: 1-detecting head, 2-sensor module, 3-LCD display screen, 4-upper computer terminal, 5-water body to be measured.

Detailed Description

The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

Referring to fig. 1 to 2, the present invention discloses a water quality monitoring data acquisition apparatus, including:

microprocessor module, GSM/GPRS communication module and sensor module 2.

The input end of the sensor module 2 is connected with a probe 1, and the probe 1 is immersed in the water body 5 to be detected and used for monitoring the water quality of the water body 5 to be detected to obtain relevant water quality data. The output end of the sensor module 2 is in communication connection with the input end of the microprocessor module through the RS485 bus, when the detection head 1 of the sensor module 2 is completely immersed into liquid to be detected, a data request command can be automatically sent through the RS485 bus, and meanwhile, data returned by the sensor module 2 are received through the RS485 bus in real time.

Preferably, the RS485 bus communication is adopted as a data transmission mode, so that a one-to-many working mode can be easily realized, the networking can be performed on the bus to realize multi-machine communication, and a plurality of transceivers are allowed to be hung on the bus. Meanwhile, the RS485 bus communication adopts a differential transmission mode, and the mode can effectively inhibit common-mode interference on an industrial field and improve the stability of the system. Meanwhile, the interface of the RS485 is very simple, similar to MAX232 used by the RS232, only one RS485 converter is needed, the RS485 converter can be directly connected with a UART serial interface of the single chip microcomputer, and an asynchronous serial communication protocol consistent with the UART is completely used, so that the RS485 converter can be easily adapted to the existing water quality measurement product.

The sensor module 2 comprises five sensors of different types, including a temperature sensor for measuring the temperature of the water body, a turbidity sensor for measuring the turbidity of the water quality, a dissolved oxygen sensor for measuring the oxygen content in the water body, a PH value sensor for monitoring the pH value of the water body, and a conductivity sensor for monitoring the conductivity of the water body. Temperature sensor, PH sensor, dissolved oxygen sensor, conductivity sensor and turbidity sensor all pass through RS485 bus communication with microprocessor and are connected, and the quality of water data that above-mentioned sensor module 2 detected can be through RS485 bus transmission to microprocessor in.

And an SP3481 chip is selected when the communication connection is realized through an RS485 bus. The SP3481 chips are a series of +3.3V low-power consumption half-duplex transceivers, which completely meet the requirements of RS-485 and RS-422 serial protocols. It is compatible with the pins of SP481, SP483 and SP485 of Sipex, as well as the industry standard specification. SP3481 combines the electrical specifications of RS-485 and RS-422 serial protocols, the data transmission rate can reach 10Mbps, and the data transmission efficiency is higher.

Preferably, the water quality data detected by the sensor module 2 is a current signal, and a signal conditioning circuit is connected between the output end of the sensor module 2 and the input end of the microprocessor module. The signal conditioning circuit takes the LM324 signal conditioning chip as a core, and can convert 4-20mA current signals of water quality data detected by the sensor module 2 into 0-5V voltage signals through four independent high-gain internal frequency compensation amplifiers in the LM324 signal conditioning chip, and transmit the voltage signals to the microprocessor module through the conditioning circuit.

Further, the sensor module 2 selects a modbus-rtu communication protocol to transmit water quality data, and the water quality data is transmitted to the microprocessor module for processing and analysis through the conditioning circuit.

The output end of the microprocessor module is connected with the input end of the GSM/GPRS communication module, and the output end of the GSM/GPRS communication module can output water quality data. The GSM/GPRS communication module adopts a communication chip SIM800C, and the communication chip SIM800C is connected with an RS-232 interface of the microprocessor to realize wireless transmission of water quality data. The communication chip SIM800C is a high-performance industrial grade GSM/GPRS development board developed by ALIENTEK, has complete functions, is suitable for various fields needing voice/short messages/GPRS data/Bluetooth communication services, and the communication chip SIM800C can realize various functions such as GPRS transmission, short message notification and the like through AT commands. The system supports SMS (short Message service) in Text and PDU formats, can realize restart and fault recovery through AT commands or shutdown signals, and has better data communication effect and higher transmission efficiency.

The water quality monitoring data acquisition device further comprises an upper computer terminal 4, and the upper computer terminal 4 is in communication connection with the microprocessor module through a 2G network. When the microprocessor module is connected with the upper computer terminal 4 through a 2G network, the upper computer terminal 4 is connected with the output end of the GSM/GPRS communication module, collected water quality data can be transmitted to the upper computer terminal 4, and the data can be transmitted to the cloud and can be subsequently displayed and processed.

Preferably, the monitoring interface of the upper computer terminal 4 can realize real-time display of data and waveforms, and simultaneously store the collected water quality data and has the functions of alarming when the time is out of limit and sending an alarm data short message to a registered mobile phone number in the system.

Further, the microprocessor module realizes wireless transmission of water quality data and communication with the upper computer terminal 4 through an RS-232 interface, level conversion is realized by adopting an MAX232 chip interface circuit, in order to obtain accurate baud rate, a crystal oscillator of the microprocessor adopts 11.0592MHz, and an SIM800C chip is connected to an RS-232 serial port of the microprocessor.

The water quality monitoring data acquisition device further comprises an LCD display screen 3, the LCD display screen 3 is welded on the microprocessor module, the input end of the LCD display screen 3 is connected with the output end of the microprocessor module, and water quality data acquired by the microprocessor module can be displayed.

Preferably, the microprocessor module is a single chip microcomputer STM32F103, a SIM800C communication chip and the sensor module 2 are all powered by separate 5V power supplies.

The working principle is as follows:

the detector head 1 is completely immersed into a water body 5 to be detected, the sensor module 2 collects water quality data, various collected water quality data signals are converted into current data, the current data are converted into voltage signals through the signal conditioning circuit, and finally the voltage signals are converted into stable digital signals through the microprocessor module. The water quality data can be displayed on the LCD display screen 3, and under the condition that the upper computer terminal 4 and the microprocessor module are successfully connected through a 2G network, wireless transmission of the water quality data can be realized through the GSM/GPRS communication module, and the collected water quality data is transmitted to the upper computer terminal 4.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the utility model may be made without departing from the spirit or scope of the utility model.

Claims (7)

1. The utility model provides a water quality monitoring data acquisition device, its quality of water that is used for monitoring the body of awaiting measuring, its characterized in that includes:

the system comprises a microprocessor module, a GSM/GPRS communication module and a sensor module;

the input end of the sensor module is connected with a detecting head, and the detecting head is immersed in the water body to be detected to obtain water quality data of the water body to be detected; the output end of the sensor module is in communication connection with the input end of the microprocessor module through an RS485 bus so as to realize the transmission and reception of water quality data;

the output end of the microprocessor module is connected with the input end of the GSM/GPRS communication module, and the output end of the GSM/GPRS communication module outputs the water quality data;

an LM324 signal conditioning chip is connected between the output end of the sensor module and the input end of the microprocessor module so as to convert the current signal of the water quality data into a voltage signal;

the system also comprises an upper computer terminal which is in communication connection with the microprocessor module through a 2G network; the upper computer terminal is connected with the output end of the GSM/GPRS communication module so as to transmit the collected water quality data to the upper computer terminal;

the GSM/GPRS communication module adopts a communication chip SIM800C, and the communication chip SIM800C is connected with an RS-232 interface of the microprocessor to realize wireless transmission of water quality data.

2. The water quality monitoring data acquisition device of claim 1, wherein the sensor module comprises a temperature sensor, a PH sensor, a dissolved oxygen sensor, a conductivity sensor, and a turbidity sensor; the temperature sensor, the PH sensor, the dissolved oxygen sensor, the conductivity sensor and the turbidity sensor are all in communication connection with the microprocessor through an RS485 bus.

3. A water quality monitoring data collection device according to claim 2, wherein the sensor module employs a modbus-rtu communication protocol for transmitting water quality data.

4. The water quality monitoring data acquisition device according to claim 1, further comprising an LCD display screen welded to the microprocessor module; and the output end of the microprocessor module is connected with the input end of the LCD display screen so as to display the read water quality data.

5. The water quality monitoring data acquisition device of claim 1, further comprising a power supply, wherein the microprocessor module, the GSM/GPRS communication module and the sensor module are all powered by the power supply.

6. The water quality monitoring data acquisition device of claim 1, wherein the microprocessor module is a single chip microcomputer STM32F 103.

7. The water quality monitoring data acquisition device of claim 6, wherein the microprocessor module and the crystal oscillator of the singlechip adopt 11.0592 MHz.

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