Patent ID: 8205505
Filing Date: 2012-06-26
Classification: G01M

Abstract:
1. A pressure testing device for performing one of a positive pressure test and a negative pressure test to an object at a pressure testing terminal thereof according to pressure testing parameters, comprising: a vacuum pump having a negative pressure terminal and a positive pressure terminal for extracting air at the negative pressure terminal and exhausting air at the positive pressure terminal; a first solenoid valve having a first intake terminal and a first exhaust terminal, wherein the first exhaust terminal is connected to the negative pressure terminal of the vacuum pump; a second solenoid valve having a second intake terminal and a second exhaust terminal, wherein the second intake terminal is connected to the positive pressure terminal of the vacuum pump; a pressure sensor having one end connected to the first intake terminal of the first solenoid valve and the second exhaust terminal of the second solenoid valve and the other end connected to the pressure testing terminal of the object, the pressure sensor being used for transferring one of pressures produced at the first intake terminal and the second exhaust terminal to the pressure testing terminal and sensing pressure state of the object through the pressure testing terminal; an operation module for displaying an operation interface to input the pressure testing parameters; and a control unit electrically connected to the vacuum pump, the first solenoid valve, the second solenoid valve, the pressure sensor and the operation module for performing one of the positive pressure test and the negative pressure test to the object according to the pressure testing parameters received by the operation module, wherein, if the pressure testing parameters belong to a negative pressure test, the control unit controls the vacuum pump and the first solenoid valve to perform an air-extracting process to the object and controls the operation module to display on the operation interface the pressure state of the object sensed by the pressure sensor, on the other hand, if the pressure testing parameters belong to a positive pressure test, the control unit controls the vacuum pump and the second solenoid valve to perform an air-exhausting process to the object and controls the operation module to display on the operation interface the pressure state of the object sensed by the pressure sensor.