Mechanical performance on-line detection device

The invention relates to a mechanical performance on-line detection device which comprises an operating isolator, a pressure sensor, a linkage mechanism and a laser displacement sensor. One end of the pressure sensor is fixedly connected with a movable conducting rod on the bottom portion of a vacuum arc-extinguishing chamber through the operating isolator, the other end of the pressure sensor is fixedly connected with the linkage mechanism, the laser displacement sensor comprises a transmitting and receiving device and a reflector, the reflector is fixed to the operating isolator, and the position of the transmitting and receiving device corresponds to that of the reflector. The force values output by the pressure sensor are changed to obtain the rigid combination and rigid separating points of a moving contact and a fixed contact in the vacuum arc-extinguishing chamber, and therefore the abrasion degree of the moving contact and the fixed contact is known. Meanwhile, the opening distance, the over travel, the speed and other parameters of the vacuum arc-extinguishing chamber are known through the changing curve of the voltage output by the laser displacement sensor, therefore, the mechanical performance on-line detection of the vacuum arc-extinguishing chamber is achieved. The laser displacement sensor is in a non-contact type, and therefore the service life of the detection device is prolonged.