CN207197567U - Forest fire protection well based on GPRS and single-chip microcomputer remotely monitors transmitting device - Google Patents

Abstract

The utility model discloses a kind of forest fire protection well based on GPRS and single-chip microcomputer remotely to monitor transmitting device, including sensor group, battery pack and electric power management circuit, data acquisition unit MCU, GPRS data Transmission system, and monitoring central server；The data detected are sent to data acquisition unit MCU by sensor group；Data acquisition unit MCU is sent to GPRS data Transmission system after carrying out Treatment Analysis to the data received, is resent to monitoring central server；Whole monitoring device is timed wake-up control using timer circuit, and timing uploading detection data to monitoring central server are to realize the reading of long-range Monitoring Data.The utility model is carried out data transmission using mobile public network, reliable and stable, and flexibility is good, and design is low with operating cost, preferably meets the needs of monitoring system；Powered using conventional batteries, battery active duty cycle length, eliminate the trouble that frequent charge changes battery；It is applied widely.

Description

Remote monitoring and transmission device for forest fire prevention water well based on GPRS and single chip computer

technical field

The utility model relates to a remote monitoring and transmission device for forest fire-proof water wells based on GPRS and a single-chip microcomputer, which belongs to the technical field of monitoring.

Background technique

Monitoring data transmission is an important part of monitoring systems such as electric power, environmental protection, water regime forecasting, dam safety monitoring, and bridge monitoring. With the development of Internet of Things technology, higher requirements are put forward for data transmission of monitoring systems. The original data Transmission can no longer meet the requirements of distribution, data processing and analysis, network sharing and mobility.

At present, the commonly used wireless data transmission methods are mainly divided into two categories: ultrashort wave radio stations and public mobile networks. The existing ultrashort wave radio monitoring system is widely used, but it has the following disadvantages: 1. The communication distance is limited; 2. The communication rate is not high, and the anti-interference ability is insufficient; 3. Both the measuring point and the monitoring center must be equipped with radio stations, and the cost is high.

The use of public mobile networks for data transmission is an important direction for the development of monitoring systems. Taking China Mobile’s network as an example, there are three ways to use public mobile networks for data transmission: short message SMS, circuit switched data service CSD mode, and GPRS mode .

Among them, short message SMS is widely used, but it has the following disadvantages: 1. The communication delay is long, and the wireless channel is prone to congestion; 2. The amount of information transmitted at one time is limited, less than 160 bytes. When the data packet is larger than 160 bytes 3. Charge according to the number of short messages, which costs more; 4. Both the measuring point and the monitoring center must be equipped with short message data transmission modules, which is costly.

Circuit-switched data service CSD mode transmission data is similar to telephone communication. There are not many applications in the existing monitoring system, and there are the following shortcomings: 1. The rate is calculated based on the length of use time. , according to long-distance charges, cost more; 2, the communication rate is not high, generally 9600 bps; 3, the measurement point and monitoring center must be equipped with mobile phone modules, the cost is relatively high.

The GPRS mode (General Packet Radio Service, General Packet Radio Service) is a high-efficiency data transmission mode using packet switching. Each user can occupy multiple wireless channels at the same time, and the same wireless channel is shared by multiple users. The resources are effectively utilized, and the data transmission rate is as high as 170 kbps. Using GPRS technology to realize data packet sending and receiving, users are always online and according to traffic billing, quickly reducing service costs. Its features are highlighted as follows: 1. Strong real-time performance. Since GPRS has real-time online characteristics, the system has no delay, which can well meet the system's requirements for real-time data collection and transmission; 2. The layout of measuring points is flexible, and the GPRS network has Covering most areas, there is basically no blind area, and a large-scale monitoring can be realized; 3. The monitoring center can be moved flexibly, as long as it can be connected to the Internet, the measuring point can be monitored; 4. The amount of information transmitted at one time can reach 1024 5. High communication rate, up to 40 kbps; 6. Using GPRS public network platform, no need to build a network, only need to install GPRS data transmission module at the measuring point, low construction cost.

The forest fire prevention water well monitoring system is located in a forested mountainous area, and the distribution of fire prevention water well measurement points is relatively scattered. A monitoring system that can meet the needs of forest monitoring.

Contents of the invention

Aiming at the problems existing in the above-mentioned prior art, the utility model provides a remote monitoring and transmission device for forest fire prevention water wells based on GPRS and single-chip microcomputer, which uses mobile public network for data transmission, which can meet the needs of forest fire prevention water well monitoring and reduce operating costs.

In order to achieve the above object, a remote monitoring and transmission device for forest fire prevention wells based on GPRS and single-chip microcomputer adopted by the utility model includes a sensor group, a battery pack and a power management circuit, a data acquisition unit MCU, a GPRS data transmission system, and a monitoring center server ; The sensor group is used to detect the real-time status of the forest fire prevention water well, and the detected data is sent to the data acquisition unit MCU; the data acquisition unit MCU processes and analyzes the received data and sends it to the GPRS data transmission system, and through The GPRS data transmission system is transmitted to the monitoring center server; the battery pack and the power management circuit are used for the power supply of each module in the whole monitoring device; the whole monitoring device adopts a timer circuit to carry out timing wake-up control, and regularly uploads detection data to the monitoring center server to Realize the reading of remote monitoring data.

The data acquisition unit MCU adopts STC15F2K60S2 series single-chip microcomputer, and the GPRS data transmission system adopts SIM900A communication module.

The sensor group, the data acquisition unit MCU, and the GPRS data transmission system are respectively powered by the sensor power supply, the single-chip power supply, and the communication module power supply in the battery pack, and control the switching on of each power supply in time-sharing and sequential order through the power management circuit according to the system control requirements and shutdown.

Preferably, the power supply of the single-chip power supply, the sensor power supply, and the communication module power supply usually take a power-off mode, and only when the timer timing time arrives, when it is necessary to collect, process and send data, the timer circuit generates a trigger wake-up pulse, which is controlled by the power management circuit. Single-chip microcomputer power supply, after the single-chip microcomputer is powered on, the system initialization work is carried out first, and the power supply to the sensor and communication module is controlled. consumption.

Preferably, the sensor group includes a temperature sensor and a liquid level sensor.

Further, it also includes a communication case, the battery pack, power management circuit, data acquisition unit MCU and GPRS data transmission system are installed in the communication case, and the sensor group is arranged outside the communication case.

Further, the communication case is provided with an anti-theft alarm device, and the anti-theft alarm device is connected with the data acquisition unit MCU. When the communication case is opened, the anti-theft alarm device automatically alarms, and sends an alarm signal to the data acquisition unit MCU, and then transmits the alarm signal to the data acquisition unit MCU, and then transmits the alarm signal to the data acquisition unit MCU via GPRS. The data transmission system uploads to the data center.

Compared with the prior art, the utility model uses the mobile public network for data transmission, which is stable, reliable, flexible, low in design and operation costs, and can better meet the requirements of the monitoring system. At the same time, it adopts an extremely low power consumption design and is powered by a conventional battery. The effective working cycle of the battery is more than one year, which saves the trouble of frequent charging and replacing the battery. It has a wide range of applications and can be widely used in fields such as electric power, environmental protection, water regime forecasting, dam safety monitoring, and bridge monitoring. In addition, the timely anti-theft warning and timely transmission of alarm data are designed to facilitate the development of anti-theft management of equipment. Moreover, the equipment chassis can be designed with an outdoor waterproof integral aluminum casting communication chassis, which fully meets the requirements for installation and use in outdoor environments.

Description of drawings

Fig. 1 is the schematic diagram of the principle of the utility model;

Fig. 2 is the hardware structural block diagram of the present utility model;

Fig. 3 is the circuit diagram of the present utility model;

Fig. 4 is the control circuit diagram of the utility model STC15F2K60S2 series single-chip microcomputer;

Fig. 5 is the utility model SIM900A communication module interface circuit;

Fig. 6 is a partial circuit diagram of the clock power supply of the utility model;

Fig. 7 is the utility model single-chip microcomputer power schematic diagram;

Fig. 8 is a schematic diagram of the sensor power supply of the present invention;

Fig. 9 is a schematic diagram of the timing circuit of the utility model;

Fig. 10 is a schematic diagram of the power supply of the communication module of the present invention;

Fig. 11 is the utility model SIM card circuit schematic diagram;

Fig. 12 is a flow chart of data transmission of the utility model.

Detailed ways

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

As shown in Figure 1, a kind of forest fire prevention water well remote monitoring transmission device based on GPRS and single-chip microcomputer includes sensor group, battery pack and power management circuit, data acquisition unit MCU, GPRS data transmission system, and monitoring center server; Described sensor The group is used to detect the real-time status of forest fire prevention water wells, and transmit the detected data to the data acquisition unit MCU; the data acquisition unit MCU processes and analyzes the received data and sends them to the GPRS data transmission system, and then through the GPRS data transmission system Send to the monitoring center server; the battery pack and the power management circuit are used for the power supply of each module in the entire monitoring device; the entire monitoring device uses a timer circuit for timing wake-up control, and regularly uploads detection data to the monitoring center server to realize remote monitoring data to read.

As shown in Fig. 2 and Fig. 3, the MCU of the data acquisition unit adopts the STC15F2K60S2 series single-chip microcomputer, and the GPRS data transmission system adopts the SIM900A communication module. The STC15F2K60S2 series single-chip microcomputer with 8051 core commonly used in the market is selected. The STC15F2K60S2 series single-chip microcomputer has dual serial ports/UART, low power consumption design, supports power-down wake-up, large-capacity memory, hardware watchdog (WDT), advanced instruction set structure , high speed, wide voltage, ISP/IAP programming, high speed ADC and other functional characteristics, especially suitable for this device. And SIM900A is a new generation of wireless communication GSM/GPRS module, which can quickly, safely and reliably realize data, voice transmission, short message service (Short Message Service) and fax in the system solution. The working voltage of the module is 3.2- 4.8 V, the working frequency band is EGSM 900 MHz and DCS 1 800 MHz. The maximum power consumption of the frequency bands is 2 W (900 MHz) and 1 W (1 800 MHz) respectively. SIM900 A is designed with power-saving technology, so the minimum current consumption in Sleep mode is only 1.0 mA. Common working modes include Sleep, Idle, Talk and other modes. As the size is only 24 mm×24 mm×3 mm, SIM900A can almost meet the space size requirements in all user applications, such as M2M, data transmission systems, etc. SIM900A is packaged in SMT, based on STE single-chip solution, using ARM926EJ-S architecture, which can realize bidirectional transmission of power connection, instructions, data, voice signals, and control signals. Keypad and SPI display interfaces allow users to flexibly design custom applications. The main serial port and debugging serial port can help users develop applications easily. One audio interface, including a microphone input and a speaker output. Programmable general-purpose input and output (GPIO). SIM900A is embedded with TCP/IP protocol, and the extended TCP/IPAT command allows users to easily use TCP/IP protocol, and it is widely used in data transmission. Wherein, the control circuit diagram of the STC15F2K60S2 series single-chip microcomputer is shown in FIG. 4 , and the interface circuit of the SIM900A communication module is shown in FIG. 5 . At the same time, the single-chip microcomputer communicates through the serial port and writes different AT commands to SIM900A to complete various functions, such as network registration, login, connection, reading the phone number on the SIM card, sending and receiving messages, data deletion messages, etc.

The sensor group, the data acquisition unit MCU, and the GPRS data transmission system are respectively powered by the sensor power supply in the battery pack, the single-chip power supply, and the communication module power supply. The timer power supply, the sensor power supply, the single-chip power supply, and the communication module power supply all adopt a separate power supply mode. According to the system control requirements, the power management circuit controls the on and off of each power supply in time-sharing and sequence, so as to obtain the minimum power consumption and greatly prolong the service life of the battery.

In order to obtain the minimum power consumption and prolong the service life of the power supply, the timer timing wake-up control method can be adopted. The power supply of the single-chip microcomputer power supply, sensor power supply, and communication module power supply are usually powered off. When it is turned on, the anti-theft circuit generates a trigger wake-up pulse), when it is necessary to collect, process and send data, the timer circuit generates a trigger wake-up pulse, and controls the power supply to the single-chip microcomputer through the power management circuit. After the power supply of the sensor and communication module, data collection and processing and data transmission are completed, the power supply of the sensor power supply, communication module power supply and single-chip microcomputer power supply is automatically turned off to obtain the minimum power consumption. The above-mentioned power sources are conventional batteries.

Among them, the circuit diagram of the clock power supply part is shown in Figure 6; the power supply of the single-chip microcomputer is shown in Figure 7; the sensor power supply is shown in Figure 8; the timing circuit can choose the TPL5000 low-power ASIC circuit launched by Ti, and its circuit diagram is shown in Figure 9 Show. The power supply of the communication module is shown in Figure 10. The SIM900A uses a single power supply with a VBAT of 3.4-4.5 V. In some cases, the burst of signal transmission can cause a voltage drop, and the peak current consumption can reach 2 A at this time. Therefore, the power supply must be able to provide enough current of 2A. To supply power to SIM900A, adopt TPS5430 to realize step-down processing from 5 to 4 V. In addition, the 6-pin SIM card circuit of SIM900A is shown in Figure 11. The interface level of the SIM card is provided by the voltage regulator inside the module, and the normal voltage value is 2.8V or 1.8V. After reset, all pins output low level.

Preferably, the sensor group includes a temperature sensor and a liquid level sensor, which are used to detect the ambient temperature and the liquid level information of the fire well in real time, and transmit the detected values to the data acquisition unit MCU.

Further, it also includes a communication case, the battery pack, power management circuit, data acquisition unit MCU and GPRS data transmission system are installed in the communication case, and the sensor group is arranged outside the communication case. The communication chassis can be designed with outdoor waterproof integral aluminum casting.

Further, the communication case is provided with an anti-theft alarm device, and the anti-theft alarm device is connected with the data acquisition unit MCU. When the communication case is opened, the anti-theft alarm device automatically alarms, and sends an alarm signal to the data acquisition unit MCU, and then transmits the alarm signal to the data acquisition unit MCU, and then transmits the alarm signal to the data acquisition unit MCU via GPRS. The data transmission system uploads to the data center.

Before use, you can install the device at the place to be installed, connect the liquid level sensor, install the battery, set the timing, press the power button, close the communication box cover, and the system can send monitoring data regularly. The data transmission process of the whole device is shown in Figure 12. When the box cover is opened, the system will automatically alarm immediately and upload the alarm signal to the data center through the communication module for timely processing.

The debugging of this system is completed, and it runs stably during the debugging process. After the low-power optimization design, it can ensure the long-term low-power operation of the device, and the static working current is as low as 100 microamps. The design cost and use cost are low, and it can be widely used in fields such as electric power, environmental protection, water regime forecasting, dam safety monitoring, bridge monitoring, etc. In the coming era of the Internet of Things, the application of wireless communication systems will play a key role.

To sum up, the utility model uses the mobile public network for data transmission, which is stable, reliable, flexible, low in design and operating costs, and can better meet the needs of the monitoring system. At the same time, it adopts an extremely low power consumption design and is powered by a conventional battery. The effective working cycle of the battery is more than one year, which saves the trouble of frequent charging and replacing the battery. It has a wide range of applications and can be widely used in fields such as electric power, environmental protection, water regime forecasting, dam safety monitoring, and bridge monitoring. In addition, the timely anti-theft warning and timely transmission of alarm data are designed to facilitate the development of anti-theft management of equipment. Moreover, the equipment chassis can be designed with an outdoor waterproof integral aluminum casting communication chassis, which fully meets the requirements for installation and use in outdoor environments.

The above description is only a description of the preferred embodiments of the present utility model, and is not intended to limit the concept and scope of the present utility model. Under the premise of not departing from the design concept of the present utility model, various modifications and improvements made by ordinary persons in the art to the technical solution of the present utility model should fall into the protection scope of the present utility model, and the technology claimed by the utility model The contents are all described in the claims.

Claims (4)

1. A forest fire prevention water well remote monitoring transmission device based on GPRS and single-chip microcomputer, is characterized in that, comprises sensor pack, battery pack and power management circuit, data acquisition unit MCU, GPRS data transmission system, and monitoring center server; The sensor group is used to detect the real-time status of forest fire prevention water wells, and transmits the detected data to the data acquisition unit MCU; the data acquisition unit MCU processes and analyzes the received data and then sends it to the GPRS data transmission system, and transmits the data to the GPRS data transmission system through the GPRS The data transmission system is sent to the monitoring center server; the battery pack and the power management circuit are used for the power supply of each module in the whole monitoring device; The entire monitoring device uses a timer circuit for timing wake-up control, and regularly uploads detection data to the monitoring center server to realize remote monitoring data reading. 2. a kind of forest fire prevention well remote monitoring transmission device based on GPRS and single-chip microcomputer according to claim 1, is characterized in that, described data acquisition unit MCU adopts STC15F2K60S2 series single-chip microcomputer, and GPRS data transmission system adopts SIM900A communication module. 3. A kind of forest fire prevention well remote monitoring transmission device based on GPRS and single-chip microcomputer according to claim 1, characterized in that, said sensor group includes a temperature sensor and a liquid level sensor. 4. a kind of forest fire prevention water well remote monitoring transmission device based on GPRS and single-chip microcomputer according to claim 1, is characterized in that, also comprises communication chassis, described battery pack and power management circuit, data acquisition unit MCU and GPRS data transmission The system is installed in the communication case, and the sensor group is arranged outside the communication case.