Construction field caution device
A technology for construction sites and alarms, which is applied to alarms, instruments, and electrical transmission signal systems, etc., can solve problems such as fuzzy alarm sounds, noise pollution, harshness, etc., achieve good warning effects, avoid noise pollution, The effect of a large warning range
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[0011] The present invention will be further described below in conjunction with the drawings and embodiments.
[0012] See figure 1 , The present invention is composed of a main controller module, an object entry and exit detection module, a brightness detection module, a sound warning module and a flash warning module. figure 2 It is a schematic circuit diagram of an embodiment of the present invention. Switches S1, C17, and R23 form a power-on reset circuit, and crystal oscillators Y1, C8, and C9 form a crystal oscillator circuit. Together with AT98S52, they form the minimum system of a single-chip microcomputer. M-JGDS-LZ5V-M12 laser through-beam sensors RE1~RE8 are respectively connected to the 8 pins of P0 port of AT89S52 single-chip microcomputer to form 8 segments of object entry detection. When a pin inputs an effective level, it indicates that the segment has Object enters. RE9~RE16 are also 8 M-JGDS-LZ5V-M12 laser through-beam sensors, which are used to detect whether...
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