Gantry Type Video Measuring Machine The gantry-type Video Measuring Machine can efficiently detect the contours, surface shapes, dimensions, angles, and positions of various workpieces. It is mainly used to measure the size and angle of parts and components that are difficult or impossible to measure with a caliper and angle ruler but play an important role in assembly. It can also be used to take pictures of some parts and components to analyze the causes of defects, especially for PCB boards, films, protective films, optical glass, electronics, large sheet metal parts, connectors, precision mechanical parts, electronic components, semiconductor components, and other industries, It can achieve rapid and accurate detection in large quantities. advantage: Gantry Type Video Measuring Machine,Gantry Type Video Measuring Instrument,Large Image Measuring Instrument,Large Video Measuring Instrument,Video Inspection System Zhejiang dexun instrument technology co., ltd , https://www.dexunmeasuring.com
1. Adopting a high-power industrial high-definition color CCD and a continuous automatic zoom depth lens with fixed frame position, the zoom rate does not require calibration, greatly improving work efficiency and measurement accuracy.
2. Images can be output to electronic computer software for surveying and mapping engineering storage. It can be used for photography, copying, and storage.
3. It can inspect the specifications of buried holes, pipe trenches, etc. on the upper surface of the tested object block. The image and color tone on the surface of the product workpiece can be clearly seen.
In recent years, the improper use of chemical fertilizers by some farmers has led to low fertilizer efficiency, increased costs, and even crop damage. The application of calcium magnesium phosphate fertilizer as a top dressing is slower compared to other forms, and the timing for application is limited. When used as a top dressing, especially during the later growth stages of crops, it not only has a low absorption rate but also shows poor effectiveness. Therefore, it is recommended to apply calcium magnesium phosphate fertilizer as a base fertilizer, mixed with organic matter, or as a side dressing. This allows the nutrients to be gradually released and absorbed by the crops, resulting in a long-lasting effect that supports steady plant growth without premature decline.
Urea and ammonium bicarbonate are often used as surface fertilizers, but despite their high nitrogen content, they must first be converted into ammonium in the soil before plants can absorb them. During this transformation, urea exists in a molecular form, which makes it prone to leaching with water and soil, reducing its availability to crops. Ammonium bicarbonate, when applied on the surface, tends to volatilize easily, releasing ammonia gas that can harm crop leaves and stems, causing damage. To avoid these issues, urea should be applied in furrows and covered with soil. For foliar applications, the concentration should be carefully controlled—0.8% to 1% for crops like wheat, rice, cotton, and corn, and 0.3% to 0.5% for vegetables.
Direct seed placement of superphosphate is not advisable, as it contains 3.5–5% free acid, which can reduce seed germination and emergence rates. If used as a top dressing, it should be applied deep in the soil. For seed fertilization, the superphosphate should be placed 5–6 cm below or beside the seeds, ensuring that the seeds are separated from the fertilizer by a layer of soil.
When using potassium sulfate or potassium nitrate alone, they tend to be weakly physiologically acidic. Once applied to the soil, potassium ions are absorbed and replaced by cations in the soil colloids, making it harder for crops to utilize them. To maximize their benefits, potash fertilizers should be combined with nitrogenous and phosphate fertilizers. In particular, on phosphorus-deficient soils such as mountainous areas, ridges, or newly reclaimed land, mixing potash with phosphate fertilizers enhances their overall effectiveness.
There is a strong "antagonism" between zinc sulfate and superphosphate when mixed together. Applying them simultaneously reduces the effectiveness of zinc fertilizer. To avoid this, it is better to apply phosphorus fertilizer as a base fertilizer and zinc fertilizer as a seedling fertilizer, or vice versa, to improve nutrient uptake efficiency.
Ammonium chloride and potassium chloride contain chloride ions, which can negatively affect certain crops. When applied to sugarcane, watermelon, tobacco, and citrus, chloride ions may lower sugar content in sugarcane and watermelon, reduce the burning quality of tobacco, and cause chronic toxicity in citrus, leading to dull leaves, reduced photosynthesis, and in severe cases, leaf curling, stunted growth, or even plant death. Therefore, these fertilizers should be used on chloride-tolerant crops such as rice, wheat, corn, and cotton to achieve optimal results.