CN1695419A - Intelligent production measurement system based on remote data transmission - Google Patents

Abstract

An intelligent yield estimating system based on remote data transmission is composed of master control system, voltage-stabilized power supply, running speed sensor, impact sensor for measuring the impact of grains stream, humidity sensor for measuring the humidity of grains, harvesting bench sensor, GPS sensor, speed sensor for grains lifting unit, and radio transmission module.

Description

Intelligent production measurement system based on remote data transmission

technical field

The invention relates to a measurement system in the field of information technology, in particular to an intelligent production measurement system based on remote data transmission.

Background technique

The current production measurement system generally includes two types: remote sensing measurement and on-line measurement. Among them, remote sensing measurement includes satellite remote sensing and aerial remote sensing, which are generally only used for total production assessment due to low resolution and poor accuracy. The online measurement is to measure the yield in real time while the combine harvester is working, so the resolution is high. Commonly used online measurement systems include: volumetric measurement system, which uses photoelectric sensors to measure the grain thickness of the scraper elevator to determine the output. Due to the large variation of grain density and the weak ability of the photoelectric sensor to resist dust pollution, the reliability and measurement accuracy are not ideal. The radiation measurement system determines the grain yield by measuring the attenuation degree of the ray after penetrating the grain flow. It has high precision, but it is generally seldom used because of the complexity of auxiliary equipment and radioactive pollution. Weighing measurement system monitors weight changes through weight sensor measurement or sets up a special screw conveyor to detect weight changes.

After searching the existing technical literature, it was found that the Chinese patent application number: 200310117204.5, title: "A Combine Harvester Grain Yield Flow Monitoring Method and Device", the device consists of a driving device, a screw conveyor, a load cell and a vehicle-mounted Composed of a computer, the grain is transported to the granary through the auger conveyor installed horizontally on the frame. The two ends of the screw conveyor are equipped with load cells, and the signal measured by the load cells is integrated to obtain the grain output. The main problem of this kind of system is that it is seriously affected by external interference. Because the ground is rough when the harvester is driving in the field, the external excitation is easily transmitted to the weight sensor through the vehicle body to form irregular strong interference noise, and the vehicle body or the device itself is caused by The inertial force generated by acceleration is also difficult to remove, and simple shock absorption cannot effectively solve the above problems. In addition, the system requires major modifications to existing harvesters and is difficult to install. Impulse sensor measurement system, that is, a plate-shaped or finger-shaped impulse sensor is installed at the outlet of the grain lifter of the harvester to obtain yield information. How to solve the problem of the influence of the grain flow velocity (related to the velocity of the grain hoist) on the yield determination is the difficulty of this method. There is no domestic research literature on the impulse system.

Contents of the invention

Aiming at the deficiencies and defects in the prior art, the present invention provides an intelligent production measurement system based on remote data transmission. It can be installed on the combine harvester. During the harvesting process, each sensor collects real-time information such as field yield, humidity and harvester walking speed, supplemented by the longitude and latitude of the harvester at this time, and each location point can be obtained. Yield information in the surrounding local area, and at the same time, the total area and cumulative yield of the harvested fields can also be obtained. These data can be used to make crop yield distribution maps, combined with agricultural expert systems, to formulate reasonable management strategies for the next round of agricultural production.

The present invention is realized through the following technical solutions, including: main control system, stabilized power supply, walking speed sensor, impulse sensor, humidity sensor, header sensor, GPS (Global Positioning System) sensor, wireless transmission module and grain hoist speed sensor. The connection method is as follows: the main control system is placed above the interior of the harvester cab to realize the reception of each sensor signal and the calculation, processing and storage of data; the regulated power supply is connected to the main control system through wires to provide stable power for the system; The walking speed sensor is set above the wheel shaft of the driving wheel of the harvester, and is connected to the main control system through a wire, and the walking speed V of the harvester can be obtained by measuring the number of wheel rotations; the impulse sensor is set at the exit of the grain hoist on the top of the harvester granary, and It is connected to the main control system through wires to measure the impulse W generated by the grain flow from the grain elevator in real time; the humidity sensor is fixed at the outlet of the grain elevator inside the harvester granary, and is connected to the main control system through wires to measure the humidity of the crops h; The header sensor is fixed above the header, connected to the main control system through wires, and monitors the working conditions of the harvester by judging the lifting state of the header; It is connected with the control system, accepts the positioning signal from the GPS satellite, obtains the real-time data of the longitude and latitude of the harvester's location, and transmits it to the main control system through the wire; Connected with the main control system, it is mainly used to measure the speed R information of the hoist, and transmit it to the main control system through the wire. After the main control system receives the information transmitted by the above-mentioned sensors through the wire, on the one hand, it performs processing and calculation and stores the data in the internal memory; .

After the main control system receives the above-mentioned sensor information, first according to the grain hoist speed R, the grain flow impulse W, the grain quality information m can be obtained by the impulse function W=f(m, R). Then the harvesting area S=V·L in a certain period of time can be obtained from the walking speed V of the harvester and the width L of the header, then the yield $Y=(1-h)\mathrm{km}/S$ It is measured (here k is the correction coefficient, which is obtained by calculating the proportional relationship between the measured value and the weighed value during actual use). Then the main control system stores the production and coordinate data in the internal memory on the one hand, and on the other hand transmits them to the computer in the monitoring center through the wireless transmission module through the wire, so as to perform centralized and accurate production statistics and analysis. And because of the mobile communication platform, the transmission distance is not limited.

The main control system is composed of a main control computer, a storage module, a touch screen man-machine interface, an analog conditioning conversion module, a digital isolation input module, and two serial interfaces. Among them, the main control computer is the core of the main control system; the storage module is responsible for storing the system program and the collected data; the touch screen man-machine interface is used to display the output and other information in real time, and provides a window and means for parameter adjustment; analog quantity conditioning conversion The module is used to convert the analog signal from the impulse sensor and the humidity sensor into a digital signal for use by the main control computer; the digital isolated input module mainly processes the pulse signal from the header sensor, walking speed sensor and grain hoist speed sensor The isolation is transformed into a voltage level that the main control computer can adapt to; the two serial interfaces are responsible for exchanging information with the GPS sensor and the wireless transmission module using the serial RS-232 protocol.

The wireless transmission module is composed of a wireless signal transceiver module, a serial interface and a data protocol conversion module. After the serial interface receives the information from the main control system, it is packaged and converted by the data protocol conversion module into a data frame that meets the requirements of the mobile communication protocol, and is transmitted externally through the wireless signal transceiver module.

The invention realizes the real-time measurement of the longitude and latitude of the location of the harvester, the measurement of the walking speed of the harvester, the monitoring of the working state of the harvester, the monitoring of the output of instantaneous objects harvested, the total output, the harvested area, the storage and display of sensory data, and the remote wireless data transmission and other functions. And by adding the speed sensor of the grain hoist, the problem of the influence of the speed of the grain hoist on the measurement of the impulse signal is simply and effectively solved. The walking speed sensor used also solves the speed measurement problem simply by measuring the number of wheel revolutions, avoiding the use of expensive radar or ultrasonic speed sensors, which not only reduces the cost, but also simplifies the setup and greatly improves the practicability of the system. The increase of the wireless transmission function greatly extends the use space of the equipment, making the final collection of data simple and feasible, and realizing the dual sharing of experts and data.

Description of drawings

Fig. 1 is a structural block diagram of the present invention;

Fig. 2 is the use setting schematic diagram of the present invention on harvester;

Fig. 3 is the structural block diagram of main control system of the present invention;

Fig. 4 is a structural block diagram of the wireless transmission module of the present invention.

Detailed ways

As shown in Figures 1 and 2, the present invention includes: main control system 1, regulated power supply 2, walking speed sensor 3, impulse sensor 4, humidity sensor 5, header sensor 6, GPS sensor 7, wireless transmission module 8 and grain Hoist speed sensor 9. The connection method is as follows: the main control system 1 and the stabilized power supply 2 are set in the cab of the harvester and connected by wires, and the walking speed sensor 3 is set above the front drive wheel shaft of the harvester to measure the number of wheel rotations and transmit it to the main control system 1 , after being processed by the main control system 1, the walking speed of the harvester is obtained. The impulse sensor 4 is set at the exit of the grain hoist on the top of the grain cabin to measure the impulse generated by the grain flow coming out of the grain hoist in real time. The humidity sensor 5 is set inside the grain cabin Facing the exit of the grain elevator, measure the humidity of the crops. The header sensor 6 is set above the header to monitor the work of the harvester by judging the lifting state of the header. The GPS sensor 7 and the wireless transmission module 8 are adsorbed on the cab roof by magnets. The GPS sensor 7 receives the positioning signal from the GPS satellite, obtains the real-time data of the longitude and latitude of the harvester's location and transmits it to the main control system 1 through a wire, and the grain hoist speed sensor 9 is arranged above the driving wheel shaft of the grain hoist. Measure the speed of the hoist and transmit it to the main control system 1 through the wire. After the main control system 1 receives the information transmitted by the above-mentioned sensors through the wire, on the one hand, it performs calculation processing and stores the data in the internal memory. On the other hand, it transmits the information wirelessly through the wire The module 8 is sent to the computer of the monitoring center to realize the real-time online measurement of the grain output.

As shown in Figure 3, the main control system 1 is composed of a main control computer 10, a storage module 11, a touch-screen man-machine interface 12, an analog conditioning conversion module 13, a digital isolation input module 14, a serial interface 15 and a serial interface 16 composition. Wherein the main control computer 10 is the core of the system, the storage module 11 is responsible for storing data, the touch-screen man-machine interface 12 is used to provide means for human-computer interaction, and the analog quantity conditioning conversion module 13 transfers the analog quantity transmitted from the impulse sensor 4 and the humidity sensor 5 The signal is converted into a digital signal for the main control computer 10 to use; the digital quantity isolation input module 14 isolates and transforms the pulse signal that the header sensor 6, the walking speed sensor 3 and the grain hoist speed sensor 9 transmit into the main control computer 10. Voltage level; the serial interfaces 15 and 16 use the serial RS-232 protocol to exchange information with the GPS sensor 7 and the wireless transmission module 8, and each part is interconnected through an internal bus.

As shown in FIG. 4 , the wireless transmission module 8 is composed of a wireless signal transceiver module 17 , a serial interface 18 and a data protocol conversion module 19 . After the serial interface 18 receives the information from the main control system 1, it is packaged and converted by the data protocol conversion module 19 into a data frame that meets the requirements of the mobile communication protocol, and is transmitted externally through the wireless signal transceiver module 17.

The main control computer 10 stores the data in the storage module 11 after calculation and processing, and transmits the data to the serial interface 18 through the serial interface 15, and then the data is processed and packaged by the data protocol conversion module 19 and sent out through the wireless signal transceiver module 17 , to realize real-time wireless transmission of production information.

The walking speed sensor 3 adopts a proximity switch to measure the speed of the traveling wheel and then obtains the operating speed of the combine harvester. The impulse sensor 4 adopts an intercepting finger grain flow sensor based on a double-hole parallel beam. Humidity sensor 5 adopts capacitive grain humidity sensor. Header sensor 6 adopts proximity switch to perceive header state. The grain hoist speed sensor 9 utilizes a proximity switch to measure the grain hoist transmission chain drive wheel speed.

When the present invention is used, the header of the harvester is lowered to the working height, and the reel of the harvester rotates to start harvesting. Turn on the regulated power supply 2 switch to supply power, after the header sensor 6 captures the header position change signal, it is transmitted to the main control system 1, and after being processed by the digital quantity isolation input module 14, it is transmitted to the main control computer 10, and the main control computer 10 is notified to start Start the system collection mechanism and enter the working state. During work, the walking speed sensor 3 arranged near the front driving wheel shaft of the harvester continuously accumulates the number of driving wheel revolutions, and transmits the signal to the main control computer 10 through the digital quantity isolation input module 14, and the main control computer 10 is based on the previously calibrated rotation speed. The walking speed V per unit time is obtained by calculating the ratio of the number to the actual distance; Wherein, as shown in Figure 2, the impulse sensor 4 is arranged at the exit of the grain hoist on the top of the harvester granary, and the grain flow from the grain hoist acts on the impulse sensor to generate a corresponding current signal, which is transmitted to the main control via the wire. The analog quantity conditioning conversion module 13 of system 1, the conditioning conversion main control computer 10 can receive the digital signal; The analog quantity adjustment conversion module 13 adjusts and converts the main control computer 10 to receive digital signals; the grain hoist speed sensor 9 is arranged near the hoist driving wheel shaft, and is mainly used to measure the hoist speed R information, which is input to the module through digital isolation 14 to the main control computer 10. The reason for adopting the grain elevator speed sensor 9 is that when the grain flow is thrown out from the grain elevator, its throwing speed V and the rotating speed R of the elevator have a linear relationship V=aR (a is a proportional coefficient). If the relationship between the impulse and the quality of the grain flow is treated on the assumption that the speed of the hoist is constant, once the speed R of the hoist changes, it will inevitably cause a large error, so it must be revised according to the actual speed of the hoist. The main control system 1 first obtains the grain quality information m from the impulse function W=f(m, R) according to the speed R of the grain hoist and the impulse W of the grain flow. Then the harvesting area S=V L in a certain period of time can be obtained from the walking speed V of the harvester and the width L of the header, and after humidity compensation, the output $Y=(1-h)\mathrm{km}/S$ It is measured (here k is the correction coefficient, which is obtained by calculating the proportional relationship between the measured value and the weighed value during actual use). The main control computer 10 obtains the latitude and longitude information received by the GPS sensor 7 through the serial interface 16, and fuses the output at this time with the latitude and longitude information to form the output data at this point. The main control computer 10 constantly repeats the above-mentioned process, and the output information of the field can be continuously obtained and recorded. At the same time, the main control computer 10 stores the data in its own storage module 11 after calculation and processing, and transmits the data to the serial interface 19 of the wireless transmission module 8 through the serial interface 15, and then through the data protocol conversion module 19. After being processed and packaged, it is sent out through the wireless signal transceiver module 17. The real-time wireless transmission of production information is realized.

The invention realizes the real-time on-line measurement of the grain yield, and has functions such as remote wireless transmission of data, prolongs the use space of the equipment, makes the final collection of data simple and feasible, and realizes double sharing of experts and data. By adding the speed sensor of the grain hoist, the problem of the influence of the speed of the grain hoist on the measurement of the impulse signal is effectively solved, and the accuracy problem of the impulse type yield measurement method is solved. The walking speed sensor adopts the method of measuring the number of rotations of the wheels, which not only reduces the cost, but also simplifies the setting and improves the practicability of the system.

Claims (9)

1. An intelligent production measurement system based on remote data transmission, comprising: main control system (1), voltage stabilized power supply (2), GPS sensor (7), characterized in that it also includes: walking speed sensor (3), Impulse sensor (4), humidity sensor (5), header sensor (6), wireless transmission module (8) and grain hoist speed sensor (9), main control system (1) and regulated power supply (2) are set in In the cab of the harvester; the walking speed sensor (3) is set above the front drive wheel shaft of the harvester, measures the number of rotations of the wheel and transmits it to the main control system (1), and the main control system (1) obtains the walking speed of the harvester after processing; the impulse The sensor (4) is arranged at the outlet of the grain elevator on the top of the grain cabin, and measures the impulse generated by the grain flow coming out of the grain elevator in real time; the humidity sensor (5) is arranged inside the grain cabin directly facing the outlet of the grain elevator, and measures the humidity of the crops; The header sensor (6) is set above the header, and monitors the work of the harvester by judging the lifting state of the header. The GPS sensor (7) and the wireless transmission module (8) are adsorbed on the cab ceiling by magnets, and the GPS sensor (7) accepts The positioning signal from the GPS satellite obtains the real-time data of the longitude and latitude of the harvester and transmits it to the main control system (1); the grain hoist speed sensor (9) is set above the driving wheel shaft of the grain hoist to measure the hoist machine speed and transmit it to the main control system (1); after the main control system (1) receives the information collected by the above-mentioned sensors, on the one hand, it performs calculation processing and stores the data in the internal memory; It is transmitted to the computer in the monitoring center to realize real-time online measurement of grain production. 2. The intelligent production measurement system based on remote data transmission according to claim 1, characterized in that the main control system (1) consists of a main control computer (10), a storage module (11), a touch screen man-machine interface (12 ) and an analog quantity conditioning conversion module (13), a digital quantity isolation input module (14), a serial interface (15) and a serial interface (16), wherein the main control computer (10) is the core of the system, and the storage module ( 11) Responsible for storing system programs and collected data. The touch screen man-machine interface (12) displays system information in real time, and provides a window and means for parameter adjustment. The analog quantity conditioning conversion module (13) connects the impulse sensor (4) and The analog signal sent by the humidity sensor (5) is converted into a digital signal and sent to the main control computer (10), and the digital isolated input module (14) connects the header sensor (6), the walking speed sensor (3) and the grain hoist The pulse signal sent by the speed sensor (9) is isolated and transformed into a voltage level that the main control computer (10) can adapt to, and the serial interface (15, 16) utilizes the serial RS-232 protocol to communicate with the GPS sensor (7) and the wireless transmission module (8) For information exchange, each part is interconnected through an internal bus. 3. The intelligent production measurement system based on remote data transmission according to claim 1, characterized in that the wireless transmission module (8) consists of a wireless signal transceiver module (17), a serial interface (18) and a data protocol conversion module ( 19), the serial interface (18) receives the information from the main control system (1) and packs and converts it into a data frame that meets the requirements of the mobile communication protocol through the data protocol conversion module (19), and passes through the wireless signal transceiver module (17) ) to send out. 4. The intelligent production measurement system based on remote data transmission according to claim 2 or 3, characterized in that the main control computer (10) stores the data in the storage module (11) after calculation and processing, and at the same time passes the data through The serial interface (15) is passed to the serial interface (18), and then processed and packaged by the data protocol conversion module (19) and sent out by the wireless signal transceiver module (17), realizing real-time wireless transmission of production information. 5. The intelligent yield measurement system based on remote data transmission according to claim 1, characterized in that the walking speed sensor (3) uses a proximity switch to measure the speed of the road wheel to obtain the operating speed of the combine harvester. 6. The intelligent yield measurement system based on remote data transmission according to claim 1, characterized in that the impulse sensor (4) is an intercepting finger grain flow sensor based on a double-hole parallel beam. 7. The intelligent yield measurement system based on remote data transmission according to claim 1, characterized in that the humidity sensor (5) is a capacitive grain humidity sensor. 8. The intelligent yield measurement system based on remote data transmission according to claim 1, characterized in that the header sensor (6) is close to the switch to sense the status of the header. 9. The intelligent yield measurement system based on remote data transmission according to claim 1, characterized in that the speed sensor (9) of the grain hoist uses a proximity switch to measure the rotational speed of the driving wheel of the grain hoist conveyor chain.

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