A piezoelectric sensing apparatus, comprising: a plurality of piezoelectric regions( 1 005, 1006;2005,2006;3007,3008;4007,4008,4009,40 10;5003,5006;6003,600 5;7003,7005,7006;8004,8006,8007,8009;9006,9007,9008,9009; 10010,1001 1, 10012, 1 0013,10014,10015,10016,10017), each piezoelectric region including a piezoelectric body, an anode surface and a cathode surface, wherein the plurality of piezoelectric regions are successively connected via at least one electrode(1004;2004;3001,3002;4004,4006;5001,5002;6004;7002,7004;8002,8005,80 08;9002,9003,9004;10002,10003,10004,10005,10006,10007,10008) from a first end of the first piezoelectric region to a first end of the last piezoelectric region such that between adjacent piezoelectric regions, surfaces of a same polarity are connected, i.e., one anode surface is connected to another anode surface, while one cathode surface is connected to another cathode surface; and the piezoelectric body refers to a material body with piezoelectric effect; a first lead electrode(1001;2001;3004;4001;5004;6001;7001;8001;9001;10001) and a second lead electrode(1002;2002;3005;4003;5005;6002;7007;8003;9005;10009), which are coupled to a second end of the first piezoelectric region which is not connected to its adjacent region and a second end of the last piezoelectric region which is not connected to its adjacent region, Z respectively; and characterized in that the at least one electrode is arranged to be mechanically connected to a to-be-measured vibrating object, so that a potential difference is produced between the first lead electrode and the second lead electrode thanks to the piezoelectric effect wherein under the action of the potential difference, an electrical signal is produced; wherein by adjusting the magnitude of the equivalent distance between the two adjacent piezoelectric regions, the demarcation point between the high frequency signal and the low frequency signal of the electrical signal be adjusted and the amplification multiple of the high frequency signal of the electrical signal be adjusted a demarcation point between the high frequency and the low frequency herein is defined as: ƒ = ν / 6 * d where v denotes the speed of mechanical wave propagation in a to-be-measured object, and d denotes an equivalent distance between the two piezoelectric regions, a signal with a frequency above the ƒ = v /(6 ∗ d) in the equation is referred to as a high-frequency signal, while a signal below the ƒ = v / (6 ∗ d) is referred to as a low-frequency signal. a plurality of piezoelectric regions( 1 005, 1006;2005,2006;3007,3008;4007,4008,4009,40 10;5003,5006;6003,600 5;7003,7005,7006;8004,8006,8007,8009;9006,9007,9008,9009; 10010,1001 1, 10012, 1 0013,10014,10015,10016,10017), each piezoelectric region including a piezoelectric body, an anode surface and a cathode surface, wherein the plurality of piezoelectric regions are successively connected via at least one electrode(1004;2004;3001,3002;4004,4006;5001,5002;6004;7002,7004;8002,8005,80 08;9002,9003,9004;10002,10003,10004,10005,10006,10007,10008) from a first end of the first piezoelectric region to a first end of the last piezoelectric region such that between adjacent piezoelectric regions, surfaces of a same polarity are connected, i.e., one anode surface is connected to another anode surface, while one cathode surface is connected to another cathode surface; and the piezoelectric body refers to a material body with piezoelectric effect; a first lead electrode(1001;2001;3004;4001;5004;6001;7001;8001;9001;10001) and a second lead electrode(1002;2002;3005;4003;5005;6002;7007;8003;9005;10009), which are coupled to a second end of the first piezoelectric region which is not connected to its adjacent region and a second end of the last piezoelectric region which is not connected to its adjacent region, Z respectively; and characterized in that the at least one electrode is arranged to be mechanically connected to a to-be-measured vibrating object, so that a potential difference is produced between the first lead electrode and the second lead electrode thanks to the piezoelectric effect wherein under the action of the potential difference, an electrical signal is produced; wherein by adjusting the magnitude of the equivalent distance between the two adjacent piezoelectric regions, the demarcation point between the high frequency signal and the low frequency signal of the electrical signal be adjusted and the amplification multiple of the high frequency signal of the electrical signal be adjusted a demarcation point between the high frequency and the low frequency herein is defined as: ƒ = ν / 6 * d where v denotes the speed of mechanical wave propagation in a to-be-measured object, and d denotes an equivalent distance between the two piezoelectric regions, a signal with a frequency above the ƒ = v /(6 ∗ d) in the equation is referred to as a high-frequency signal, while a signal below the ƒ = v / (6 ∗ d) is referred to as a low-frequency signal.