To provide means that efficiently acquires oscillation signals by an oscillation sensor.SOLUTION: An oscillation sensor 10 is arranged on a flat surface, a concave/convex surface of signal amplification means 11 is caused to face an up surface of the oscillation sensor 10, and the signal amplification means 11 is arranged so that the concave/convex surface is directed downward. Further, signal amplification means 11A and 11B may be arranged so that concave/convex surfaces face each other above and beneath the oscillation sensor 10. When the signal amplification means 11 is arranged above and below, concavity/convexity of the signal amplification means 11 on an up side and concavity/convexity of the signal amplification means 11 on a down side may match, but the signal amplification means 11A and 11B are preferably provided so that the concavities/convexities are staggered up and down, and mesh. Furthermore, the oscillation sensor unit 11 has a transmission delivery route (wire or wireless), and outputs signals including oscillation detected by the oscillation sensor to a signal processing device via the transmission delivery route.SELECTED DRAWING: Figure 1【課題】振動センサーによって効率よく振動信号を取得する手段を提供する。【解決手段】平坦な表面上に振動センサー１０を配置し、振動センサー１０の上表面に信号増幅手段１１の凹凸面を対向させて、凹凸面が下向きとなるように信号増幅手段１１を配置する。また、振動センサー１０の上下に凹凸面が対向するように信号増幅手段１１Ａ、１１Ｂを配置してもよい。上下に信号増幅手段１１を配置する場合は、上側の信号増幅手段１１Ａの凹凸と下側の信号増幅手段１１Ｂの凹凸とが一致してもよいが、上下で互い違いとなり、凹凸が噛み合うように信号増幅手段１１Ａ、１１Ｂを設けることが好ましい。なお、振動センサー部１は送信伝達経路（有線又は無線）を有し、送信伝達経路を介して振動センサーで検出した振動を含む信号を信号処理装置に出力する。【選択図】図１
