One of the indispensable components in the money counter is the photoelectric sensor. The counter of the money counter adopts non-contact infrared photoelectric detection technology, which has the advantages of simple structure, high precision and fast response speed.
The counter of the money counter uses two sets of infrared photoelectric sensors. Each sensor consists of an infrared light-emitting diode and a photosensitive triode that receives infrared light, leaving a proper distance between the two.
When no banknotes pass, the receiving tube is turned on by light, and the output is 0. When a banknote passes through, the infrared light is blocked, the luminous flux of the receiving tube is insufficient, and the output is 1. After the banknote passes, the receiving tube receives the infrared light and conducts it again. In this way, a pulse signal is generated at the output of this part of the circuit. These signals are shaped and amplified by the subsequent circuit and then input into the single-chip microcomputer. The single-chip microcomputer drives the execution motor, and completes counting and display accordingly. The reason why the banknote counter uses two sets of photoelectric sensors is to detect the integrity of the banknotes and prevent the remaining coins from being counted.
The photoelectric sensor is used to detect the counting of the banknotes to realize the accumulation of the number of banknotes, and then use the liquid crystal and the external display part to intuitively display the number of banknotes to the user, and automatically alarm the user when an abnormality occurs.