Rebar diameter detection device for constructional engineering

The utility model discloses a steel bar diameter detection device for constructional engineering, relates to the field of constructional engineering detection equipment, and aims to solve the problems of errors and incapability of linear detection caused by manual reading in the prior art. The sliding block, the compression spring and the weighing sensor are arranged in the sliding groove, the steel bar can be inserted into the hole channel, the sliding block slides into the sliding groove and extrudes the compression spring, the elastic force of the compression spring acts on the weighing sensor, the microprocessor obtains the elastic force of the compression spring by obtaining the detection value of the weighing sensor, and then the diameter of the steel bar can be obtained. The device can automatically detect the diameter of the reinforcing steel bar without manually reading scale marks, and is small in error and sensitive in response; the conveying mechanism can pull the steel bar to pass through the hol