Signal acquisition devices

A signal acquisition device, comprising:

• a wearable object provided with a sensor, wherein the wearable object is configured to be worn on a user and acquire a physiological signal of the user via the sensor;
• a sub-base configured to accommodate a circuit structure, wherein the circuit structure includes a power supply circuit and a signal transmitter, the power supply circuit is configured to supply power to the sensor, and the signal transmitter is configured to send the physiological signal to an external device;
• and
• a mother base fixed on the wearable object, wherein the sub-base is detachably connected with the mother base, the mother base includes a transmission interface, and when the mother base is connected with the sub-base, the circuit structure is electrically connected with the sensor via the transmission interface;
• wherein the circuit structure includes a transmission plug adapted to the transmission interface;
• one of the transmission plug and the transmission interface includes a plurality of pop pins, and the plurality of pop pins are distributed in an array;
• the other of the transmission plug and the transmission interface includes a plurality of contact points, and the plurality of contact points correspond to the plurality of pop pins one by one;
• when the transmission plug is electrically connected with the transmission interface, end portions of the plurality of contact points are in contact with end portions of the plurality of pop pins one by one;
• the mother base further includes a second circuit board, and the transmission interface is connected with a wire of the second circuit board;
• the signal acquisition device includes a plurality of conducting wires;
• and
• for each of the plurality of conducting wires, one end of the conducting wire is electrically connected with the sensor, and another end of the conducting wire is connected with one contact point or one pop pin of the transmission interface through the wire of the second circuit board.