The distributed vehicle safety performance detection system technology is a server-to-workstation (Server-CI:ent) structure, and the physical network topology is a Hub-based star structure, but the logical network topology is a bus type, and the network transmission medium is not Shielded twisted pair (UTP, unshielded twisted pair). Taking into account the rapid development of Internet technology and the need for remote data exchange in the future, the system provides remote access routers that can be conveniently accessed anywhere by remote dialing through public telecommunication networks. Detection process: Under the command of the LED dot matrix display and the electronic voice system, the pilots drive from the population into the detection line, and first record the basic data such as the license plate number, vehicle models, and test items on the login machine. The information is written in the database. The workstations request the inspection items of the vehicles to be inspected from the database. The pilots sequentially pass the inspection of the workstations according to the prompts of the workstations and electronic voice systems, and each workstation will detect The results are written to the database. Finally, the login manager summarizes the analysis and the test report sheet is printed out automatically. The average online time for each vehicle to be checked is 3 to 4 minutes, allowing four vehicles to be tested online at the same time.
Polyacrylamide (PAM) is a water-soluble polymer, which is insoluble in most organic solvents, has good flocculating properties, can reduce frictional resistance between liquids, Can be divided into non-ionic, anionic, cationic and amphoteric four types.
When PAM is used for flocculation, it is related to the surface properties of the species being flocculated, especially the potential, viscosity, turbidity, and pH of the suspension. The kinetic potential of the particle surface is the reason for particle inhibition. Can reduce the potential and condense.
Granular polyacrylamide flocculant cannot be directly added to sewage. It must be dissolved in water before use, and its aqueous solution are used to treat sewage.The water in which the particulate polymer is dissolved should be clean. Generally tap water is suitable for formulating polymer solutions. Strong ACID, strong alkali, high salt water is not suitable for preparation. Water at room temperature is ok, no necessary to heat. Dissolution is slow when the water temperature is below 5 ° C. Increasing the water temperature will accelerate the dissolution rate, but above 40 ° C will accelerate the degradation of the polymer and affect the use effect. The solution concentration is recommended to be 0.1% -0.3%.
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