CN202853781U

CN202853781U - Handheld agricultural environment temperature detector

Info

Publication number: CN202853781U
Application number: CN 201220517308
Authority: CN
Inventors: 李皓
Original assignee: YANGLING QIANTAI ELECTRONIC TECHNOLOGY Co Ltd
Current assignee: YANGLING QIANTAI ELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2012-09-29
Filing date: 2012-09-29
Publication date: 2013-04-03
Anticipated expiration: 2022-09-29

Abstract

Disclosed is a handheld agricultural environment temperature detector. The detector is internally provided with a temperature sensor which is a DS18B20 digital temperature sensor, the output of the temperature sensor is connected with a core processor which is an STC12LE5A60S2 single chip microcomputer, a human-computer interaction module of the core processor comprises keys and an LCD which are arranged on a detector panel, the core processor is connected with an SD card for data storage and is connected with a clock module to provide a time function, and the clock module uses a DS1302 chip. According to the utility model, devices are reasonably selected to design a corresponding matching circuit, the miniaturization of equipment is realized, functions like field reading and historical data querying can be achieved, the detector supports data communication with a PC and long-term data storage. Practical applications show that the detector can be applied to temperature measurement occasions such as farmlands and greenhouse animal breeding or plant planting environments and has high practical value.

Description

Hand-held agricultural environment temperature monitor

Technical field

The utility model belongs to the modern agricultural technology field, relates to a kind of hand-held agricultural environment temperature monitor.

Background technology

Animal and plant growth all needs the adapt circumstance condition, and temperature is one of topmost envirment factor.For plant, temperature can not only be photosynthetic by impact, breathe, rising etc., and metabolic processes affects plant growth, and can synthesize and absorption and the transporting process influence plant growth of the metabolism such as transportation or liquid manure by impact is organic; For animal, the behavior such as temperature can be direct or indirect affects that it grows, breeding and animation.In addition, the variation of temperature can also cause humidity, precipitation, the oxygen solubleness in water and the change of food and other animals and plants activities or behavior, thus the vegeto-animal vital movement of remote effect.Therefore, in time understand ambient temperature situations and for guiding agricultural production very important practical significance is arranged.At present, the shortcoming such as the most peasant households of China still adopt the method that hangs thermometer to carry out temperature detection, and it is low that this mode exists efficient, and error is large far can not satisfy the demand of modern agricultural development; And existing hand-held temperature monitoring equipment exists the shortcomings such as price height, complicated operation to be difficult to apply in agricultural production.

Summary of the invention

In order to overcome above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of hand-held agricultural environment temperature monitor, and development and operation is simple, accuracy of detection is high, the equipment volume is little, easy to use, is applicable to agriculture actual production.

To achieve these goals, the technical solution adopted in the utility model is:

Hand-held agricultural environment temperature monitor, built-in temperature sensor, temperature sensor adopts the DS18B20 digital temperature sensor, temperature sensor output connects core processor, core processor adopts the STC12LE5A60S2 single-chip microcomputer, and the human-computer interaction module of core processor comprises LCD and the button that is positioned on the detector panel, and core processor meets SD and sticks into capable data storage, core processor connects clock module time function is provided, and clock module adopts the DS1302 chip.

Described detector adopts the external connection battery power supply, the built-in power module, and power module utilizes the TPS79533 chip that the external connection battery voltage transitions is system power supply for 3.3V.

The utility model choose reasonable device, design corresponding match circuit, realized device miniaturization, can realize the functions such as on-the-spot reading, the inquiry of historical data, and the data communication of support and PC and data longer-term storage, prove by practical application, detect occasion applicable to farmland, greenhouse animal-breeding or planting environment temperature, have higher practical value.

Description of drawings

Fig. 1 is the utility model electricity theory diagram.

Fig. 2 is the utility model temperature sensor circuit figure.

Fig. 3 is profile front schematic view of the present utility model.

Embodiment

Below in conjunction with drawings and Examples the utility model is carried out more detailed explanation.

As shown in Figure 1, be the utility model electricity theory diagram, this hand-held tester built-in temperature sensor, temperature sensor adopts the DS18B20 digital temperature sensor, temperature sensor output connects core processor, core processor adopts the STC12LE5A60S2 single-chip microcomputer, the human-computer interaction module of core processor comprises LCD and the button that is positioned on the detector panel, core processor meets SD and sticks into capable data storage, core processor connects clock module time function is provided, and clock module adopts the DS1302 chip.

As shown in Figure 2, the digital temperature sensor DS18B20 that sensor assembly selects DALLAS company to produce, its temperature measurement range-55 ℃～+ 125 ℃, operating voltage range 3V～5.5V, precision ± 0.5 ℃, have the advantages that temperature signal to be directly changed into the processing of serial digital signal confession single-chip microcomputer, and include the working storage of 64 ROM cell and 9 bytes.Its unique one-wire interface has reduced sensor to the taking of single-chip processor i/o mouth, and has simplified logical circuit, make system more flexible, convenient, and reliability is high, and price is low, satisfies agricultural fully and uses requirement to temperature detection.Figure 2 shows that the circuit connection diagram of sensor assembly, 1 pin GND of DS18B20 chip connects power supply ground; 2 pin DQ are digital signal I/O end; 3 pin VDD connect power supply end.

The utility model adopts external three joint 1.5V powered battery, utilizes step-down chip TPS79533 that the external connection battery voltage transitions is 3.3V, is the whole system power supply again.This module is used example design according to the typical case in the TPS79533 chip handbook, does not need to add other circuit.

The utility model selects 51 single-chip microcomputer STC12LE5A60S2 of new generation as micro-control unit (MCU), operating voltage is 3.3V, frequency of operation can reach 35MHz, inside has the RAM of 2 road PWM delivery outlets, 4 16 bit timing devices, 8 tunnel 10 precision A/D conversions, 56KB Flash storage space, 60KB application space, 1280B, and integrated MAX810 Special reset circuit, have UART, the SPI interface, and low in energy consumption, strong interference immunity, satisfy the requirement that system processes temperature collection and data fully, and provide guarantee for system's subsequent development.The P0 mouth connects 8 circuit-switched data mouths of liquid crystal display in this modular circuit; The P1 mouth is connected with sampled signal and the storage of SD card data: P1.0 cut-in temperature detection signal, finish the temperature monitoring data acquisition; P1.4 connects SD card SS, and P1.5 connects SD card MOSI, and P1.6 connects SD card MISO, and P1.7 connects SD card SCLK, realizes that the SD card is to the storage of ambient temperature information; P3.0, P3.1 mouth are connected with serial ports, carry out the programming of program and the communication function between single-chip microcomputer and the PC; P1.1, P4.4, P4.5 link to each other with I/O, SCK, the RST of clock chip DS1302 respectively, realize the system time function; P2.4-P2.7 and four button control linkages satisfy the user key-press operation.

The utility model selects the SD card as memory device, and volume is little, and capacity is large, and data writing speed is high.

The utility model clock module adopts the DS1302 chip, it can to the year, month, day before 2100, week, day, the time, minute, second carries out accurate timing and has the leap year compensate function, satisfies system requirements fully.Simultaneously, DS 1302 is a low-power chips, have the dual power supply pin and can be used for primary power and backup battery dual power supply pattern, 2V-5.5V wide voltage input, can guarantee to transmit the clock signal of a plurality of bytes or RAM data to single-chip microcomputer, embedded 31*8 position ram register for temporal data at every turn.The DS1302 hardware circuit links to each other by I/O, SCK, three pins of RST with CPU based on the design of the typical application circuit in the chip handbook, adds without additional circuit.

As shown in Figure 3, the utility model adopts the hand-held design by above suitable type selecting, and detector 1 roughly is rectangular shape, and there are display screen 2 and keyboard region 3 in the front, and the standby volume of integral installation dwindles greatly, and is very easy to use.

To sum up, the utility model has reduced equipment volume when having guaranteed temperature detecting function, reduced operation easier, and the design of hand-held is so that use conveniently, and cost and power consumption are also very low, can promote in wide farmers.

Claims

1. hand-held agricultural environment temperature monitor, built-in temperature sensor, temperature sensor adopts the DS18B20 digital temperature sensor, it is characterized in that temperature sensor output connects core processor, core processor adopts the STC12LE5A60S2 single-chip microcomputer, the human-computer interaction module of core processor comprises LCD and the button that is positioned on the detector panel, core processor meets SD and sticks into capable data storage, and core processor connects clock module time function is provided, and clock module adopts the DS1302 chip.

2. hand-held agricultural environment temperature monitor according to claim 1 is characterized in that: described detector adopts the external connection battery power supply, the built-in power module, and power module utilizes the TPS79533 chip that the external connection battery voltage transitions is system power supply for 3.3V.