Fixing device and positioning method of patch type temperature measuring sensor

The invention provides a fixing device and a positioning method for a surface-mounted temperature measurement sensor. The fixing device comprises an arc-shaped sheet, a first connecting piece, a second connecting piece and a pressing clamp, a shape memory alloy is arranged on the arc-shaped sheet, and comprises an initial state with an arc-shaped cross section and a bent state with curled into a circle along the length direction; scales and a clamping groove are arranged on the arc-shaped piece in the length direction, the first connecting piece is located on the inner side of the clamping groove and can slide in the length direction of the arc-shaped piece, and the pressing clamp is located on the outer side of the clamping groove and is fixedly connected with the first connecting piece through the second connecting piece. The pressing portion of the pressing clamp is located on the side away from the arc-shaped piece, the lowest position of the pressing clamp is lower than the bottom face of the arc-shaped