Fig. 2From: Influence of boundary conditions on acoustic emission propagation characteristics of Zelkova schneiderianaSchematic diagram of the test scheme. ① Ruler ②AE source ③AE signal acquisition computer ④PAI front-end amplifier ⑤Sound-absorbing cotton ⑥Sensors ⑦Aluminum plate ⑧Vise ⑨NI acquisition card ⑩Arbitrary waveform generatorBack to article page