The invention discloses a
strain type linear bidirectional large displacement sensor and a detection method of the
strain type linear bidirectional large displacement sensor. According to the
strain type linear bidirectional large displacement sensor, a strain sheet is arranged on a displacement strain conversion beam to form a
bridge circuit which is connected with a
strain gauge, a fixed end of the displacement strain conversion beam is fixed on a detection point, and a freed end of the displacement strain conversion beam is inserted into a rigid guide groove and fixed at a reference position. According to the detection method of the strain type linear bidirectional large displacement sensor, when the detection point moves, the displacement of the rigid guide groove is in
linear relation with the strain at the position of the strain sheet on the displacement strain conversion beam, strain values during the movement of the detection point are recorded through the
strain gauge, and the displacement value of the detection point is determined through the recorded strain values according to a marked relational expression between the strain and the displacement. The strain type linear bidirectional large displacement sensor is simple in structure, good in
repeatability, high in sensitivity, convenient to manufacture and install, low in cost, and suitable for detection and tests in an
engineering structure, especially the measurement of large displacement of the
engineering structure and components of the
engineering structure.