Automation of the test bench for experimental research of the local air cooler of the vehicle driver

The question of automation of the test bench for research and selection on the basis of experimental data of rational supply of L air by a local water evaporator cooler of a vehicle driver (tractor, car, road-building machine) is considered. In the design of an automated test bench made in the form of an open wind tunnel, along with an auxiliary electric fan, an electric heater of the treated air, a local air cooler and a human heat simulator Qh, there are elements for measuring and controlling the quantities L, Qh, the temperature t of the treated air and th - the body surface simulator. The imple- mentation of the control system with active computing devices, where the leading role is played by the STH0024UY-v3 thermostat with a remote temperature sensor DS18B20, containing a microprocessor and a control electrical relay. s Such modules for t and th are assigned the main function of automated control of the stand, and the personal computer provides execution of the program of automated control in the «pulse - pause - pulse» mode, and also performs the auxiliary task of collecting and storing information about the data of the research results. As a result of the automation of the test bench, the time is shortened and the laboriousness of the study is eliminated. At control experimental check of functional qualities of the stand it is established that in the manual control mode the stabilization of indications th, t and L at a given level is associated with a great emotional and physical load of the operator, as he must almost continuously monitor them and to some extent intuitively influence changing their mechanisms. At the same time, a considerable time is wasted to achieve the necessary result. Automated control can almost completely free the operator from unnecessary manipulation, and only at certain intervals (not more than 120 seconds) he controls the readings of the instruments without interfering with the work of the stand. This removes his emotional and physical load, and due to the exclusion of unnecessary manipulation of controls, the experiment time will be shortened.

normalization of the driver's thermal state, local air cooler, automated control, disturbing influences, driver's heat, emission air, air temperature, open body surface temperature, active computing devices, executive mechanisms