CN201087869Y

CN201087869Y - Stay-away alarm for medical use

Info

Publication number: CN201087869Y
Application number: CNU2007200205878U
Authority: CN
Inventors: 柳青; 郑建华; 郑海芳
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-04-11
Filing date: 2007-04-11
Publication date: 2008-07-16
Anticipated expiration: 2017-04-11

Abstract

The utility model relates to a medical keep-away alarm, in particular to an acoustics sound and light alarm device for reminding and warning people in medical danger area. The medical keep-away alarm is composed of an induction piece, a field-effect transistor, a time base circuit and a buzzer. When nobody approaches in normal times, the induction piece S is connected with the grid of the field-effect transistor BG; a drain electrode of the field-effect transistor BG is connected with a resistor R1, and a pin 2 of the time base circuit NE555 is connected with a source, and a pin 3 is connected with the buzzer Y and an light-emitting diode (LED); when somebody approaches, the induction piece S and the pin 2 and the pin 1 of the time base circuit NE555 are connected with an adjustable resistor W1; a pin 5 is connected with a capacitor C1 and a capacitor C2 of which the other end is connected with a pin 7, a pin 6, a resistor R2, the buzzer Y, the light-emitting diode (LED), a battery E and a switch K. The utility model is the medical keep-away alarm which has the advantages of simple structure, small size, light weight, convenient installation and debugging, clear alarm hint and alarm sound, integrates the sound, the light and the electricity into one body and is extensively used in medical danger area.

Description

Medical not near alarm

Technical field:

The utility model relates to a kind of medical not near alarm, and particularly medical hazardous location is to other people prompting warning tones sound light warning device.

Background technology:

At present, be provided with on the little board in medical hazardous location and write the warning word, some people does not read, come into medical explosive area, work the mischief to other people are healthy, particularly medical radiation X ray and isotope, other people enter into nearby, cause serious harm to other people are healthy.On the warning board word time permanent, writing is unintelligible, causes other people to be strayed into medical explosive area.

Summary of the invention:

The purpose of this utility model; provide a kind of medical not near alarm; it is the form one warning device that adopts collection acousto-optic electromechanical tiltedly to swing moving; the prompting alerts people is away from medical hazardous location; in order to avoid healthy working the mischief; protect other people healthy timely and effectively, prevent that other people from entering medical hazardous location.

The medical not near alarm of the utility model takes following technical scheme to realize, it is to be made of sensing chip and field effect transistor and time base circuit and hummer, nobody is connected with the grid of field effect transistor BG near sensing chip S at ordinary times, the drain electrode of field effect transistor BG is connected with resistance R 1, NE555 time base circuit 2 pin that are connected with source electrode, 3 pin connect hummer Y and LED; Someone is connected adjustable resistance W1 with NE555 time base circuit 2 pin with 1 pin near sensing chip S, and 5 pin connect capacitor C 1, C2, and the C2 other end connects 7 pin, 6 pin, resistance R 2 and hummer Y, LED, battery E, K switch.The clutter of human body sensing joins on the grid of field effect transistor BG by sensing chip S, field effect transistor BG was turn-offed by moment, though the time is very short, make the NE555 time base circuit be temporary steady state (SS) by the steady state (SS) upset, the drain electrode of field effect transistor BG and the resistance value between the source electrode are increased, time base circuit 2 pin current potential step-downs are less than or equal to 1/3VCC, time base circuit 3 pin output high level, hummer is reported to the police, and time-delay time base circuit 1 pin, and resistance R 2 was 40 seconds with capacitor C 2 time-delays.Time base circuit internal discharge pipe ends, and allows external capacitive C2 charging, and the current potential of time base circuit 6 pin that link to each other with capacitor C 2 anodes also raises along with charging, when its current potential raises the threshold values 2/3VCC of then basic circuit 6 pin, time base circuit 3 pin output low levels, hummer are not rung, and stop to report to the police.Adjustable resistance control people and sensing chip spacing distance, LED flash is shinny, and NE555 is a time base circuit, BG is a 3DJ6 type field effect transistor, and E is a laminated cell, its saturated drain current position 2.5MA, sensing chip is that scale copper is made, and the sensing chip device is on the inwall of box shell.

The medical not effect of nearly alarm of the utility model is simple in structure, volume is little in light weight, Installation and Debugging are convenient, the prompting warning is eye-catching, and the acousto-optic electricity is integrated, the warning song, people and sensing chip spacing distance are adjustable, prevent the people medical hazardous location of entering into, in order to avoid healthy working the mischief, what be widely used in medical hazardous location does not closely point out alarm.

Description of drawings:

The medical not near alarm of the utility model will describe in further detail in conjunction with the accompanying drawings.

Accompanying drawing is the medical not circuit layout card of nearly alarm of the utility model.

Embodiment:

With reference to accompanying drawing, the medical not near alarm of the utility model, it is to be made of sensing chip and field effect transistor and time base circuit and hummer, nobody is connected with the grid of field effect transistor BG near sensing chip S at ordinary times, the drain electrode of field effect transistor BG is connected with resistance R 1, NE555 time base circuit 2 pin that are connected with source electrode, 3 pin connect hummer Y and LED; Someone is connected adjustable resistance W1 with NE555 time base circuit 2 pin with 1 pin near sensing chip S, and 5 pin connect capacitor C 1, C2, and the C2 other end connects 7 pin, 6 pin, resistance R 2 and hummer Y, LED, battery E, K switch.The clutter of human body sensing joins on the grid of field effect transistor BG by sensing chip S, field effect transistor BG was turn-offed by moment, though the time is very short, make the NE555 time base circuit be temporary steady state (SS) by the steady state (SS) upset, drain electrode and the resistance value between the source electrode of field effect transistor BG are increased, NE555 time base circuit 2 pin current potential step-downs are less than or equal to 1/3VCC, NE555 time base circuit 3 pin output high level, hummer Y reports to the police, and time-delay NE555 time base circuit 1 pin, resistance R 2 was 40 seconds with capacitor C 2 time-delays, capacitor C 1 is logical burnt every value, and small induction people's alternating signal is provided, and NE555 time base circuit internal discharge pipe ends, allow external capacitive C2 charging, the current potential of NE555 time base circuit 6 pin that link to each other with capacitor C 2 anodes also raises along with charging, when its current potential is elevated to the threshold values 2/3VCC of NE555 time base circuit 6 pin, and NE555 time base circuit 3 pin output low levels, hummer Y does not ring, and stops to report to the police.Adjustable resistance W1 control people and sensing chip spacing distance, the LED flicker is shinny, and NE555 is a time base circuit, BG is a 3DJ6 type field effect transistor, and E is a laminated cell, its saturated drain current position 2.5MA, sensing chip S is that scale copper is made, and sensing chip S device is on the inwall of box shell.

Claims

1. medical near alarm, it is to be made of sensing chip and field effect transistor and time base circuit and hummer, it is characterized in that nobody is connected with the grid of field effect transistor BG near sensing chip S, the drain electrode of field effect transistor BG is connected with resistance R (1), NE555 time base circuit 2 pin that are connected with source electrode, 3 pin connect hummer Y and LED; Someone is connected adjustable resistance W1 with NE555 time base circuit 2 pin with 1 pin near sensing chip S, and 5 pin connect capacitor C (1), C (2), C (2) other end connect 7 pin, 6 pin, resistance R (2), with hummer Y, LED, battery E, K switch.