Patent ID: 8625112

Claim:
A thickness measuring system for measuring a thickness of a planar plate-shaped member placed on a conveyer belt, the system comprising: a processor; a first distance measurer coupled to the processor and configured to emit a first light beam that is parallel to the conveyer belt, and to receive the first light beam after the first light beam is reflected by the planar plate-shaped member, to calculate a first distance between the first distance measurer and the planar plate-shaped member; and a second distance measurer coupled to the processor and configured to emit a second light beam and a third light beam, and to receive the second light beam and the third light beam after the second light beam and the third light beam are reflected by the planar plate-shaped member, to calculate a second distance between the second distance measurer and the planar plate-shaped member and a third distance between the second distance measurer and the planar plate-shaped member, wherein the second light beam is parallel to the conveyer belt and is received by the second distance measurer, and a first angle is formed between the second light beam and the third light beam; wherein the processor is configured to calculate a thickness of the plate-shaped member based on the first distance, the second distance, the third distance, the first angle, and a distance between the first distance measurer and the second distance measurer.