High Frequency Laser Ranging Sensor
The module operates with a laser wavelength of 905 nanometers, falling within the near-infrared spectrum, which ensures minimal transmission loss in the atmosphere and poses negligible risk of harm to human eyes. Laser sensors with a 700-meter (standard specs) range typically offer high accuracy and extensive ranging capabilities, making them well-suited for applications requiring long-distance measurements. These sensors find widespread use in military, aerospace, surveying, geological exploration, and other related fields.
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To protect the greenhouse from cold weather, a multilayer film can be used. This may include double or multi-layer insulation films, or it can be covered with shade cloth or mulch within the structure. Alternatively, non-woven fabric can also be applied to provide an extra layer of protection. These methods help in maintaining a stable internal temperature and reducing heat loss.
In addition, installing a second curtain on the inner side of the greenhouse is highly effective. Materials such as straw curtains or reed mats can be used to create an additional buffer between the outside air and the inside environment, significantly improving the insulation performance of the structure.
During severe cold spells, a heating furnace equipped with a properly sealed exhaust pipe can be used to warm the space. It's crucial that the exhaust system is tightly connected to avoid any smoke leakage, which could damage the crops and pose health risks.
Another quick method to raise the temperature is by burning wood or charcoal. In an acre-sized greenhouse, placing 2-3 tiles filled with sawdust and lighting them can generate enough heat to combat the cold. Similarly, firewood or charcoal can be arranged along the pathways, but care must be taken to keep the flames small and controlled to prevent damage to nearby plants. Fire safety should always be a top priority.
Installing warming bulbs is another practical solution. For an acre of greenhouse space, 25 to 30 warming lights can be installed and operated day and night to provide continuous frost protection.
Other options include using electric heating cables or applying warm organic fertilizers to increase soil temperature. However, electric heating systems are typically more suitable for seedling nurseries due to their high cost and limited scalability. They are not recommended for large-scale applications.
With advancements in technology, various temporary warming solutions are now available. These include air heating lines, electric heating wires, portable heaters, iodine tungsten lamps, incandescent bulbs, LED energy-saving lamps, and reflective films. These tools are especially useful in emergency situations and can provide rapid and effective temperature control.
By combining these methods, greenhouse operators can effectively protect their crops during harsh winter conditions while ensuring optimal growing environments.