The current temperature and humidity monitor has a wide variety of temperature and humidity sensors, and the performance accuracy varies greatly, resulting in a huge price difference between the temperature and humidity sensors. The sensors used in various locations of the distributed system may not be consistent. For example, in some laboratories, the accuracy of temperature and humidity sensors requires the use of high-precision sensors, while in some laboratories the requirements are relatively low, and these process variables need to be monitored in the same temperature and humidity monitoring system. The adoption of a high-precision temperature and humidity sensor can satisfy the requirements for the collection of environmental parameters, but the entire system grid is tens or even a thousand times the price of the lower-precision sensor.
Multi-function wireless ad hoc network temperature and humidity monitor, through the analog switch circuit allows the system to configure different temperature and humidity sensors according to different environmental requirements, through the desktop temperature and humidity monitoring and wireless data receiving and sending, can improve the temperature monitoring accuracy of the workbench, reduce System cost meets metrological verification requirements.
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Split set bolt is also called "Split Set Stabilizer". It was successfully developed by American Professor Scott in the early 1970s. It was used as a patented product by Ingersoll Rand for mining support. In the early 1980s, the Beijing Institute of Well Construction conducted exploratory tests on slotted pipe anchors in the laboratory and achieved good results. Later, it was gradually promoted and applied in the coal system.
Split set bolt is a underground mining support product. It has simple installation process and convenient use. It has strong anchoring force and tensile strength in underground mining and shotcrete support. It has Large force, strong expansion force.
Split set bolt has good supporting effect. Bolt support conforms to modern rock mechanics and surrounding rock control theory in terms of support principles, and belongs to active support. After the bolt is installed, the stability of the surrounding rock can be mobilized and utilized, and the bearing capacity of the surrounding rock can be fully utilized, and controls the deformation of the surrounding rock of the roadway effectively.so split set bolt can protect the stability of the surrounding rock of the roadway and improve the maintenance of the roadway.
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