Electrical control device and hydraulic control device in runway surface friction coefficient testing car

The invention discloses an electrical control device and a hydraulic control device in a runway surface friction coefficient testing car, relating to an automatic controller system, wherein the electrical control device comprises an upper computer, a lower computer, a relay, a power supply, a printer, an amplification conditioning module, a sensor, a signal converting circuit, an auto speed pulsesignal exit side and a braking signal exit side; wherein the upper computer is an industrial control computer the lower computer is a PLC computer, and the sensor comprises a horizontal force sensor,a vertical force sensor and a water pressure sensor. The hydraulic control device uses a hydraulic cylinder two-way connecting vessel and is composed of a hydraulic pump station, a three-position four-way electromagnetic directional valve, a pressure testing adapter, a hydraulic energy storage, a hydraulic cylinder, an electromagnetic directional ball valve, a hydraulic lock, a valve block and a travel switch, wherein the