JPS60158288U - Pyroelectric infrared intrusion alarm device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

The drawings relate to a pyroelectric intrusion alarm device. Figure 1 shows the warning area with - mirrors when using a dual element sensor, Figure 2 shows the warning area when a predetermined number of mirrors are combined depending on the warning distance and range, and Figure 3: Dual element equivalent. Circuit, Fig. 4: Example of voltage comparison circuit, Fig. 5: Threshold value and input relationship diagram, Fig. 6:
Output diagram, Figure 7: Voltage comparison port with hinterris characteristic,
Fig. 8: Output diagram with hysteresis characteristic, Fig. 9: Output diagram, Fig. 10: Output diagram with constant output direction, Fig. 11N: Discrimination circuit according to the present invention, Fig. 12: Various parts Waveform diagram.

Claims (1)

[Scope of utility model registration request] In a pyroelectric infrared intrusion alarm device, there are a plurality of input reception pulse signals generated by the light reception sensor when far infrared rays are incident on the light reception sensor, and when the plurality of input reception pulse signals are input to the intrusion alarm circuit, A plurality of input received pulse signals are input to the intrusion alarm circuit within a certain period of time, which is preset in the discrimination circuit by a discrimination circuit installed in the intrusion alarm circuit. The intrusion alarm output signal is output according to the set number of input received pulse signals by checking whether there is a plurality of input received pulse signals input within a set fixed time. Electric type infrared intrusion alarm device.