CN209911999U

CN209911999U - Handheld orchard management terminal based on RFID

Info

Publication number: CN209911999U
Application number: CN201921054304.0U
Authority: CN
Inventors: 孙鲁青; 孙康
Original assignee: Binzhou University
Current assignee: Binzhou University
Priority date: 2019-07-08
Filing date: 2019-07-08
Publication date: 2020-01-07
Anticipated expiration: 2029-07-08

Abstract

The utility model relates to an agricultural information ization technical field, in particular to hand-held type orchard management terminal based on RFID. The portable handheld electronic device comprises a handheld shell, wherein a detachable front cover is arranged at the front end of the handheld shell, and a handle is arranged at the rear end of the handheld shell; the upper end surface of the handheld shell is inclined towards the rear end, and a display screen is arranged on the upper end surface; the handheld shell comprises a handheld shell body and is characterized in that a main control board is fixed on the inner wall of the handheld shell body, and the main control board is respectively connected with a display screen, an RFID reader-writer, a GPS module, a USB expansion module, a sensor expansion module, a front panel indication module and a power management module through flat cables; the power management module is connected with a power supply installed in the handheld shell, and the power management module is connected with the power switch and the sensor expansion module through flat cables. The utility model discloses can accomplish the collection and the management of orchard relevant information, the data collection is compared with calibration reference data after, and the rate of accuracy is about 85%, and it is consuming time 2-3 minutes to detect every tree on average.

Description

Handheld orchard management terminal based on RFID

Technical Field

The utility model relates to an agricultural information ization technical field, in particular to hand-held type orchard management terminal based on RFID.

Background

China is a large country for fruit production and sale, and as one of the main horticultural crops in China, the fruit production and sale already have a large share in national economy in China, and the fruit production and sale are daily consumer goods very popular with people. According to research, in the whole growth period of fruit trees, environmental parameters such as the temperature and humidity of air, the intensity of illumination, the rainfall, the temperature and humidity of soil, the pH value and the like are basic parameters influencing the growth and the achievement of the fruit trees. Therefore, the information can be mastered better and more comprehensively, and a basis can be provided for orchard management. In addition, the temperature and humidity of air and soil are the most important environmental factors for the disease and insect attack of fruit trees, and the timely monitoring of environmental parameters of the orchard is also very important for the prediction and prevention of the disease and insect damage of the fruit trees.

At present, most of domestic orchard environment data acquisition still needs to be finished by manual acquisition, and the work of fruit tree growth environment, management technology implementation, pest and disease damage prevention and the like mainly depends on manual experience. The mode consumes a large amount of labor and time cost, the recording and analysis of data have high randomness and blindness, and the method has great influence on improving the management level of fruit trees and the quality of fruits, so that the method has great significance on implementing information management on orchard environment.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a remedy prior art not enough, provide a hand-held type orchard management terminal based on RFID.

The utility model discloses a realize through following technical scheme:

the utility model provides a hand-held type orchard management terminal based on RFID which characterized in that: the portable handheld electronic device comprises a handheld shell, wherein a detachable front cover is arranged at the front end of the handheld shell, and a handle is arranged at the rear end of the handheld shell; the upper end surface of the handheld shell is inclined towards the rear end, and a display screen is arranged on the upper end surface; the handheld shell comprises a handheld shell body and is characterized in that a main control board is fixed on the inner wall of the handheld shell body, and the main control board is respectively connected with a display screen, an RFID reader-writer, a GPS module, a USB expansion module, a sensor expansion module, a front panel indication module and a power management module through flat cables; the power management module is connected with a power supply installed in the handheld shell, and the power management module is connected with the power switch and the sensor expansion module through flat cables.

Furthermore, the master control board is integrated with a GPRS module.

Further, the sensor expansion module comprises 6 sensor connectors, and the sensor connectors are embedded in the bottom of the side wall of the handheld shell.

Further, the front panel indicating module comprises a button and an indicating lamp, and is installed on the upper end face of the handheld shell and located at the lower end of the display screen.

Further, the main control board comprises a MCU minimum system, SIM900A and W5500 peripheral circuits, nRF24L01+ radio frequency circuit.

Further, the MCU minimum system comprises a crystal oscillator system, a digital power supply, an analog power supply, a reset circuit and a debugging circuit.

The utility model has the advantages that: the utility model can complete the collection and management of orchard related information, the identification accuracy rate of a single fruit tree is 100 percent, and the accuracy rate is about 85 percent after the collected data is compared with the calibration reference data; the human-computer interaction interface is simple and friendly, the operation is convenient, and the average detection of each tree takes 2-3 minutes.

Drawings

The present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic side view of the present invention;

FIG. 3 is a schematic diagram of the circuit connection of the present invention;

FIG. 4 is a flow chart illustrating the operation of the present invention;

FIG. 5 is a circuit for outputting voltage according to the present invention;

fig. 6 is a schematic diagram of a STM32F030F4P6 minimum system according to the present invention;

fig. 7 is a diagram of the resistance voltage-dividing circuit of the present invention;

fig. 8 is a driving circuit diagram of the present invention;

fig. 9 is a circuit diagram of an output interface of the present invention;

in the figure, 1 a handheld shell, 2 handles, 3 display screens, 4 main control boards, 5RFID readers, 6GPS modules, 7USB expansion modules, 8 sensor expansion modules, 9 front panel indication modules, 10 power management modules and 11 power switches.

Detailed Description

The attached drawing is a concrete embodiment of the utility model. The handheld shell comprises a handheld shell body 1, wherein a detachable front cover is arranged at the front end of the handheld shell body 1, and a handle 2 is arranged at the rear end of the handheld shell body 1; the upper end surface of the handheld shell 1 is inclined towards the rear end, and the upper end surface is provided with a display screen 3; a main control board 4 is fixed on the inner wall of the handheld shell 1, and the main control board 4 is respectively connected with a display screen 3, an RFID reader-writer 5, a GPS module 6, a USB expansion module 7, a sensor expansion module 8, a front panel indication module 9 and a power management module 10 through flat cables; the power management module 10 is connected with a power supply installed in the handheld shell 1, and the power management module 10 is respectively connected with a power switch 11 and a sensor expansion module 8 through a flat cable. According to the power supply requirement, a 3S lithium battery (the lowest voltage is 11.1V, and 12.6V is fully charged) is selected as a complete machine power supply battery, and an EUP3476 synchronous voltage reduction DC-DC chip is used as a voltage reduction chip. In order to ensure the voltage stability of the control system and not to make the lithium battery over-discharge to protect the lithium battery, a protection and detection device should be arranged in the power module. The STM32F030F4P6 singlechip is selected as the control chip of the power supply system, and the main tasks of the singlechip are to detect the voltage of a battery and provide a power switch.

A power management module: generating voltage required by a system to ensure the stability of power supply voltage; the power supply acts as the heart for the entire system and its design is critical. The whole system is driven by electric power, and in order to guarantee endurance and power, the lithium battery is adopted to supply power to the whole system.

According to the power supply requirement, a 3S lithium battery (the lowest voltage is 11.1V, and 12.6V is fully charged) is selected as a complete machine power supply battery, and an EUP3476 synchronous voltage reduction DC-DC chip is used as a voltage reduction chip.

As can be seen by referring to the EUP3476 data manual, the buck IC output voltage is determined by the voltage divider resistance, as shown in equation 3-1.

（3-1）

Wherein, R2 is a ground terminal resistor, and the handbook indicates that R2 can not exceed 100K omega at most, and recommends 10K omega; according to the voltage requirements, taking R2 as 10K omega, respectively calculating the voltage dividing resistance value as follows:

according to the standard resistance table, the most recent value of the 0603 series resistance 40K omega is 40.2K omega; if R1 is 40.2K Ω and R2 is 10K Ω, the output voltage is:

according to the SIM900A data sheet, the normal power supply range is 3.8V-4.2V, 4.016V is within the normal power supply range, so the divider resistors are selected to be R1= 40.2K Ω, and R2=10K Ω.

According to the above calculation method, the values of the voltage dividing resistors required for calculating 3.3V and 5V respectively are:

the output voltage circuit can be plotted according to the recommended circuit of the EUP3476 data manual, as shown in fig. 5.

In order to ensure the voltage stability of the control system and not to make the lithium battery over-discharge to protect the lithium battery, a protection and detection device should be arranged in the power module. The STM32F030F4P6 singlechip is selected as the control chip of the power supply system, and the main tasks of the singlechip are to detect the voltage of a battery and provide a power switch. A schematic diagram of the STM32F030F4P6 minimum system is shown in fig. 6.

Wherein, the SWD terminal is as debugging interface, and the UART interface links to each other with the mainboard, and the main function provides electric quantity information for main control chip to and low-power alarm function.

In order to detect the voltage, the voltage is divided by using a resistance voltage division mode and then is sent to an ADC (analog to digital converter) interface of the singlechip, and the voltage is converted into a digital quantity and then is calculated to be a power supply voltage value. The resistance voltage division is shown in fig. 7, wherein PA1 is an AD interface of the single chip microcomputer, R19 and D2 are combined to realize overvoltage protection, and R18 and R21 realize voltage division.

When shutdown is needed, the output voltage is controlled and switched by using the MOSFET, the IRF3205 is selected as a power tube, the N-channel MOS tube is easier to control by using low-end driving, and the IRF3205 is driven after the control signal voltage is raised by using the triode S8050. Wherein GND _ SYS _ OUT is GND of the output terminal. The driving circuit is shown in fig. 8. After the above design, the interface finally connected with the motherboard is shown in fig. 9.

Further, the main control board 4 is integrated with a GPRS module. The GSM module SIM900A acts as a 2G network access IC; in order to facilitate connection with the existing internet of things, 2.4G wireless support is added in the design, nRF24L01+ is used as a 2.4G communication IC, and RF2401C is added as a 2.4G PA amplification chip; RC522 is used when reading and writing RFID tags.

Further, the sensor expansion module 8 comprises 6 sensor connectors embedded in the bottom of the side wall of the handheld shell 1. The sensors comprise a temperature and humidity sensor (including air and soil), a CO2 concentration sensor, an illumination sensor, a wind power and wind direction sensor, an image sensor and the like; and the joint of the sensor expansion module is butted with the sensor.

Further, the front panel indicating module 9 comprises a button and an indicating lamp, and the front panel indicating module 9 is installed on the upper end surface of the handheld shell 1 and is located at the lower end of the display screen 3.

Further, the main control board 4 includes a MCU minimum system, SIM900A and W5500 peripheral circuits, nRF24L01+ radio frequency circuits.

Further, the MCU minimum system comprises a crystal oscillator system, a digital power supply, an analog power supply, a reset circuit and a debugging circuit. Two MCUs of ARMCortex-M4 kernels are selected, namely STM32F429IGT6 and MK60DN512VLL10 are respectively used as an interactive MCU and a sensor processing MCU, wherein the STM32F429IGT6 is provided with a high-speed RGB LCD driver, the main frequency of the RGB LCD driver reaches 192MHZ, the MK60DN512VLL10 has extremely wide working temperature, the lowest working temperature of the RGB LCD driver is-40 ℃, and the RGB LED driving circuit can be safely used in most agricultural environments in China.

When in use: the specific operation flow is shown in fig. 4, when the device is held by a worker, when the device approaches an RFID tag hung on a fruit tree or other crops, an RFID card reader is activated, the tag is scanned at the same time, the sensor is collected according to the collection sequence, the current sensor value can be collected by pressing a button, the collection of the current tag is completed, the next tag is continuously waited to enter the range of the sensor, and the collection history is recorded in a list. After all data acquisition is completed, the handheld terminal needs to be connected to a computer by using a USB, and a sensor-picture uploading tool is selected from software to complete the subsequent uploading work of pictures.

The present invention has been described above by way of example, but the present invention is not limited to the above-mentioned embodiments, and any modification or variation based on the present invention is within the scope of the present invention.

Claims

1. The utility model provides a hand-held type orchard management terminal based on RFID which characterized in that: the portable handheld electronic device comprises a handheld shell, wherein a detachable front cover is arranged at the front end of the handheld shell, and a handle is arranged at the rear end of the handheld shell; the upper end surface of the handheld shell is inclined towards the rear end, and a display screen is arranged on the upper end surface; the handheld shell comprises a handheld shell body and is characterized in that a main control board is fixed on the inner wall of the handheld shell body, and the main control board is respectively connected with a display screen, an RFID reader-writer, a GPS module, a USB expansion module, a sensor expansion module, a front panel indication module and a power management module through flat cables; the power management module is connected with a power supply installed in the handheld shell, and the power management module is connected with the power switch and the sensor expansion module through flat cables.

2. The RFID-based handheld orchard management terminal of claim 1, wherein: the main control board is integrated with a GPRS module.

3. The RFID-based handheld orchard management terminal of claim 1, wherein: the sensor expansion module comprises 6 sensor connectors, and the sensor connectors are embedded in the bottom of the side wall of the handheld shell.

4. The RFID-based handheld orchard management terminal of claim 1, wherein: the front panel indicating module comprises a button and an indicating lamp, and is installed on the upper end face of the handheld shell and located at the lower end of the display screen.

5. The RFID-based handheld orchard management terminal of claim 1, wherein: the main control board comprises a MCU minimum system, SIM900A and W5500 peripheral circuits, and a nRF24L01+ radio frequency circuit.

6. The RFID-based handheld orchard management terminal of claim 5, wherein: the MCU minimum system comprises a crystal oscillator system, a digital power supply, an analog power supply, a reset circuit and a debugging circuit.