Research on Measurement Accuracy of Area Measuring Instrument Combined with GPS

In recent years, the development of mobile computing and remote sensing technology, and the continuous maturity of GPS technology, the application of various industries is constantly deepening, providing strong technical support for the use of embedded development of location-based geographic information services. The state is implementing a digital strategy that requires various industries to achieve information and digitalization, such as digital cities, digital transportation, digital forestry, and intensive farming. In these areas, remote sensing, GPS satellite positioning and other technologies are used to obtain information, and GIS systems are used to store and process information. With the help of computer networks and communications, information processing and analysis are finally achieved, decision-making basis is provided, and information is transmitted in real time. The area measuring instrument plays a very important role in the measurement of agricultural area, and the related results obtained are also accurate and reliable.

The area measuring instrument adopts GPS single point positioning to determine the coordinates of the sub-group boundary points, and the principle is the same as the distance rendezvous in the measurement distance. The position of the GPS satellite in the air is known at any moment. As long as the star source is used to observe 4 satellites in the air at the boundary feature of the subclass, the distance (the pseudorange) from the observation instant to the point to be measured can be calculated. The coordinates of the point to be measured. Because GPS satellites operate independently in the air, the GPS time of each satellite is corrected to become a unified UTC time. Ground users can open Star Sources to observe and locate anytime, anywhere. The distance from the punctual point observed by Starsource to the satellite is not the actual distance, which includes the error caused by the satellite clock and the satellite receiver's clock skew.

The accuracy of the area measuring instrument is affected by many factors such as the GPS positioning error, the size of the plot, the shading of the forest and the mountains. If the Xingyuantong Palm Forest Surveyor can accept more than 4 satellites, it can effectively locate and complete the area measurement. When the plot area is less than 600m2, the area measurement error will exceed 5%. The smaller the parcel, the greater the relative error. Canopy closure affects the reception of GPS signals, which in turn affects area measurements. When equipped with micro-antennas, Xingyuantong can be positioned smoothly in woods with close to 1 degrees of cactus without affecting the accuracy of area measurement. The effect of the mountain on satellite signals is an issue that cannot be overcome by any GPS device. In the Grand Canyon, because of the inability to receive signals from 4 satellites, this product, like other products, is difficult to locate and measure.

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Brief Introduction

U Shape Screw Conveyor , which is generally used in processing of food, pharmaceuticals, chemicals, minerals, ceramics, plastic and rubber. Its design is very simple & eliminates the need for any additional operating equipment such as filters or bearing. It consists of electric motor driven spiral, which is the only moving part, rotates within a food grade & sealed tube. The material moves along the spiral within the tube. The unique action of the Screw Conveyor eliminates the risk of the product separation that can take place in conventional pneumatic conveying systems where mixed materials have components of different densities and particle size.In fact,the conveying action ensures constant remixing.Conveyor maximum length can be upto 10 meters for material and may be  increased  or decreased inversely with bulk density.Vertical installation are also possible, but carrying capacity  decreases with increase in angle of inclination. Feed hopper is available in standard size or according to customers specification.



Features

1. It is available in options of stainless  steel  or  mild  steel  /  painted.  for most applications, flat : for fine powder. proscrew : for difficult material.

2. Dust free, Easy to Clean, high & low level control, safe & hygienic handling.

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Application

Chemical industry:resin, pigment,cosmetic, coatings, chinese medicine powder.

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Medicinal industry: all kinds of medicine

Waste treatment: disposed oil, disposed water, disposed dye waste water, active carbon.


U Shape Screw Conveyor

U Shape Screw Conveyor

U Shape Screw Conveyor ,U Trough Screw Conveyor,Inclined Screw Conveyor,Stainless Steel Screw Conveyor

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