Signal acquisition device

The utility model discloses a signal acquisition device which comprises a protective shell, a placing table is fixedly installed at the inner bottom of the protective shell, an acquisition device body is arranged at the top of the placing table, clamping plates are arranged on the two sides of the acquisition device body, and a clamping assembly connected with the two clamping plates is arranged in the protective shell. Through grooves are formed in the two sides of the protective shell. In the use process of the signal acquisition device, the acquisition device body can be effectively assembled and disassembled by the signal acquisition device, and the situation that a protective shell and a heat dissipation dustproof net are fixed to the acquisition device body through a large number of bolts in an existing signal acquisition device is avoided; and dust and impurities are gradually accumulated on the side surface of the dustproof net after long-time use, so that blockage is easily caused, the dustproof net