Bridge resonance testing device and method

The invention discloses a bridge resonance testing device and method. The bridge resonance testing device comprises a bridge and a vibration sensor installed on the bridge. The vibration sensor comprises a supporting column which is fixedly installed on the top face of the bridge and is perpendicular to the horizontal line, a piezoelectric cantilever beam is fixedly connected to one side of the supporting column, and a piezoelectric piece is fixedly connected to the side, close to the supporting column, of the piezoelectric cantilever beam. The piezoelectric piece is connected with an A/D converter through a data line, measured data is transmitted to a microprocessor through the data line after A/D conversion, the microprocessor is connected with a computer, and finally, the monitored datais uploaded to the computer. Vibration amplitudes and characteristic parameters of vibration frequencies of multiple positions of the bridge can be captured, and therefore, the state of the bridge can be detected sensitively