CN2872312Y - Agricultural environmental factor collector - Google Patents

Abstract

Portable agricultural key environmental factor collector, including front panel (1), Chinese ICD liquid crystal display (2), touch input button (3), external DC power supply indicator light (4), lithium battery charging indicator light (5), Main circuit board (6), control module (7) composed of MSP430F135 microcontroller and peripheral circuits, RS485 network communication interface (8), sensor signal input interface (9), DC power interface (10), USB power interface (11) , a lithium battery (12), a power switch (13), a plastic box (14), an integrated temperature and humidity sensor (15), a ground temperature sensor (16), and a light sensor (17). It is used for automatic measurement of air temperature, air humidity, dew point temperature, soil temperature and light intensity in greenhouses, cities, fields, farmland and other environments.

Description

Portable Agricultural Key Environmental Factor Collector

Technical field:

The utility model belongs to the field of agricultural environment monitoring instruments and is used for automatic measurement of key environmental factors such as greenhouses, cities, fields, and farmland.

Background technique:

Existing portable environmental information collectors generally have the following problems:

1. There are few environmental parameters to measure. If you want to measure multiple environmental parameters, you need to use multiple collectors at the same time.

2. The accuracy and long-term stability are not very good, and the dew point cannot be measured with high quality

3. Only data measurement can be performed, but the data cannot be stored or the storage capacity is very small, and the networking is difficult, so it is difficult to perform multi-point measurement.

4. Using dry batteries for power supply requires frequent replacement of batteries, which is inconvenient to use and increases costs.

5. Many foreign products are expensive and inconvenient to operate and use, and it is difficult to guarantee after-sales service.

Invention content:

The purpose of this utility model is to introduce a kind of data storage that can measure air temperature, air humidity, dew point temperature, soil temperature, light intensity, large capacity, communicate with computer through RS485 interface, use lithium battery for power supply, have very good reliability It is a new type of portable agricultural key environmental factor collector with high accuracy, high accuracy and long-term stability. The technical solution adopted by the utility model to solve its technical problems:

MSP430F135 is an ultra-low power consumption MSP430 series product, the operating voltage is 1.8~3.6V, 5 low power consumption modes, 16kB FLASH program memory that can be programmed multiple times, and a full-duplex serial interface. 1 hardware SPI interface, 8-channel 12-bit AD converter; the serial port uses SN65HVD3082 to expand into an RS485 interface to realize data transmission with the host computer; the SPI interface is connected to the data memory AT45DB081 to achieve large-capacity data storage; After pressing, it is connected to 1 AD converter to measure the remaining power. The real-time clock DS1302 provides a time reference for the system, and the data collected according to the set value is regularly stored in the data memory. The watchdog MAX706 is used to enhance the anti-jamming performance, and the system can recover by itself after crashing due to strong interference. The data acquisition interface is a digital signal interface, and the signal is directly sent to the single-chip microcomputer for processing; the temperature and humidity sensor uses the integrated SHT71 to realize calibration-free and can accurately measure the dew point; the ground temperature sensor uses a first-line device DS18B20; the light sensor uses TSL230, which can realize the range Automatic conversion. The human-machine interface is composed of power switch, touch input button, JHD12232A Chinese LCD display, and light-emitting diodes. It completes the power on and off, the setting of various parameters, the scrolling display of collected data and date and time, the display of remaining power, and the status of external power supply. indication, charging status indication, etc. The system can be powered by a lithium battery, 5V DC power supply or computer USB port to charge the lithium battery through the charging chip LTC4055.

The beneficial effects of the utility model:

1. Realized the measurement of air temperature, air humidity, dew point temperature, soil temperature, and light intensity, Chinese LCD display, and large-capacity data storage.

2. It can exchange data with the upper computer through the RS485 network interface, the transmission distance is long, and the operation is convenient.

3. Powered by lithium battery, it can be recharged and used repeatedly without replacing the battery.

4. Ultra-low power consumption design, saving battery power.

Description of drawings:

Fig. 1 is a schematic top view of the physical structure of the present utility model.

Fig. 2 is a schematic side view of the physical structure of the present invention.

Fig. 3 is a schematic diagram of the composition and structure of the system of the present utility model.

Detailed ways:

As shown in Figure 1, the Chinese LCD liquid crystal display screen (2), the touch input button (3), the external DC power supply indicator light (4), and the lithium battery charging indicator light (5) are fixed on the front panel (1), and the front panel (1) Fix the front part of the plastic box (14) with screws; control module (7), RS485 network communication interface (8), sensor signal input interface (9), DC power interface (10), USB power interface (11 ) is welded on the main circuit board (6), and the main circuit board (6) and the lithium battery (12) are fixed on the inside of the plastic box (14) with screws; between the front panel (1) and the main circuit board (6) Cable connection; the power switch (13) is fixed on the side of the plastic box (14); the temperature and humidity integrated sensor (15), the ground temperature sensor (16), and the light sensor (17) are respectively connected to the sensor signal input interface (9) through cables .

The system is powered by a lithium battery, and the 5V DC power supply charges the lithium battery (12) through the DC power interface (10) or the USB bus of the computer through the USB power interface (11). The entire system adopts ultra-low power consumption design, which can work continuously for a long time without external power supply.

A power switch (13), a Chinese LCD liquid crystal display (2), a touch input button (3), an external DC power supply indicator light (4) and a lithium battery charging indicator light (5) form a man-machine interface and a status display. Through the man-machine interface, the machine can be turned on and off, and various parameters can be set, such as: system number, system date and time, data storage time interval, etc., scrolling display of collected data, system date and time, system operating status and remaining power, etc. The indication of the external DC power supply and lithium battery charging is given by the indicator light. The network communication interface is composed of RS485 network communication interface (8). The system can communicate with the computer through the RS485 network communication interface, receive various commands and send the collected data.

The control module (7) is composed of a MSP430F135 single-chip microcomputer and its peripheral circuits, including a data memory circuit, a real-time clock circuit, a watchdog circuit and the like. As the control core of the whole system, the control module controls each part of the circuit to complete parameter setting, sensor data reading conversion, time and date reading discrimination, data storage in the data memory, scrolling display of data and prompt information, status Overall tasks such as display, data communication with the computer, battery power detection, etc.

Claims (2)

1. Portable agricultural key environmental factor collector, characterized by a front panel (1), a Chinese LCD display (2), a touch input button (3), an external DC power supply indicator (4), and a lithium battery charging indicator (5), main circuit board (6), control module composed of MSP430F135 microcontroller and peripheral circuits (7), RS485 network communication interface (8), sensor signal input interface (9), DC power interface (10), USB power supply Interface (11), lithium battery (12), power switch (13), plastic box (14), temperature and humidity integrated sensor (15), ground temperature sensor (16), light sensor (17) together form a whole; Chinese LCD liquid crystal display The screen (2), touch input button (3), external DC power indicator light (4), lithium battery charging indicator light (5) are fixed on the front panel (1), and the front panel (1) is fixed on the plastic box ( 14) at the front; control module (7), RS485 network communication interface (8), sensor signal input interface (9), DC power interface (10), USB power interface (11) are welded on the main circuit board (6) , the main circuit board (6) and the lithium battery (12) are fixed inside the plastic box (14) with screws; the front panel (1) and the main circuit board (6) are connected with cables; the power switch (13) is fixed On the side of the plastic box (14); the temperature and humidity integrated sensor (15), the ground temperature sensor (16), and the light sensor (17) are respectively connected to the sensor signal input interface (9) by cables. 2. The portable agricultural key environmental factor acquisition instrument as claimed in claim 1, characterized in that the circuit part consists of single-chip microcomputer MSP430F135, watchdog MAX706, charging chip LTC4055, boost chip MAX756, step-down chip TPS7333, voltage reverse chip ICL7660 , real-time clock DS1302, data memory AT45DB081, sensor signal input interface, DC power interface, USB power interface, power switch, Chinese LCD liquid crystal display JHD12232A, SN65HVD3082 chip extended RS485 network interface, touch input button, external DC power indicator light, Lithium battery charging indicator light, temperature and humidity integrated sensor SHT71, ground temperature sensor DS18B20, and light sensor TSL230 are jointly composed; MSP430F135 and its internal software are the control core of the entire system, and the watchdog is connected to the reset pin of MSP430F135; The bus is connected to the SPI interface of MSP430F135, and the RS485 network interface is connected to the serial port of MSP430F135 through the expansion chip; MSP430F135; the lithium battery is connected to the 1-way AD conversion interface of MSP430F135 after being divided by a precision resistor; the system uses a lithium battery for power supply, and the external power supply charges the lithium battery through a DC power interface or a USB power interface.

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