CN204166642U - Infrared ray audible-visual annunciator - Google Patents

Abstract

The utility model discloses a kind of infrared ray audible-visual annunciator, its feature comprises: described infrared light emission circuit is made up of infrarede emitting diode D1 and resistance R1 and linear potentiometer RP, and the model that infrarede emitting diode D1 selects is SE303; Described infrared electro change-over circuit is made up of infrared photodiode D2 and resistance R2, NPN transistor VT1, resistance R3, time base circuit IC1 and electric capacity C1, the model that infrared photodiode D2 selects is PH202, and the model that time base circuit IC1 selects is NE555; Described level signal is amplified and sound light alarming circuit is made up of resistance R4, NPN transistor VT2, hummer HA, red light emitting diodes LED and resistance R5.Emission and receiving of infrared is arranged on the both sides of passage or door by infrared ray audible-visual annunciator described in the utility model respectively, when having detected human body or object process is blocked, at once sends sound and light alarm.

Description

Infrared ray audible-visual annunciator

Technical field

The utility model belongs to application of electronic technology and technical field of security and protection, relates to a kind of infrared ray audible-visual annunciator.

Background technology

On market, burglar alarm is various in style, obtains the mode of alert nothing more than there being following a few class: one be market share maximum be the alarm that (adding Fresnel Lenses with pyroelectric effect device) manufacture of popping one's head in infrared sensor; Two is be against shock, tamper evident, the noise-proofing alarm that using of representative is vibrated, displacement transducer manufactures with vehicle-mounted; Three be a small amount of touch, inductive probe, microwave probe manufacture alarm.The leading position that these burglar alarms are taken precautions against in a lot of field and positive role undoubted.

But take infrared sensor as the alarm of probe, also really there are some problems in actual use.Market uses maximum human body heat-releasing infrared detection alarming devices, outward appearance is white half garden cylindricality, is commonly called as infrared eye.Using pyroelectric effect device in infrared probe, having added again Fresnel Lenses to improve detection range.In addition, these infrared probes are all sensitiveer, reliable when indoor test, but often will give a discount in actual applications.

1. when indoor air temperature >=30 degree in summer, because environment temperature floods body temperature, people's shell temperature adds that sweat evaporation probably only has 31 degree, so body temperature is close to environment temperature, in infrared eye, detection chip is difficult to the body temperature detecting people, cause detection range sharply to shorten detection effect is unreliable or lost efficacy;

2. during room temperature 25 ~ 30 degree, meet thief and animal (comprising pet) in the face of infrared probe window move laterally, walk about time can report to the police, if when slowly doing longitudinally to keep straight on facing to detection window, infrared probe is just slow in reacting or lost efficacy;

3. room temperature is 25 degree time, and human body is when the hot probe window releasing infrared detection alarming device travels longitudinally, and namely in the face of infrared acquisition window is close at leisure, only to closing alarm at leisure, infrared detection alarming device is usually without reflection;

4. have a kind of being placed on that window protects window radar, it also belongs to human body heat-releasing infrared detection alarming device.Although temperature only has twenties degree, the Infrared intrusion detector be contained on window is subject to sunlight and irradiates, and alarm internal temperature is difficult to distribute, and detection chip also affects detection effect because temperature in casket is too high;

What 5. also have is arranged on human body heat-releasing infrared detection alarming device on courtyard wall, and by the interference of environment temperature, its effect also can be had a greatly reduced quality, and easily suffers that lead-in wire is cut off or destroyed.

As can be seen here: to use out of doors summer or to install human body heat-releasing Infrared intrusion detector serviceability reliable not.The invader being familiar with infrared probe principle of work can manage the dead angle utilizing probe, closes from infrared probe side, below or destroys alarm, thus enters infrared acquisition and take precautions against region.Infrared probe, to not mobile object, can not be reacted to the object not sending out infrared heat, and invader can utilize club to change the search coverage of infrared probe.Some product toys are strayed into defence area and wrong report phenomenon occur, and too sensitive product has mouse to enter defence area also to report to the police, and these situations often cause some to bother to monitor staff.

In order to problems such as some shortcoming and price of solving and making up the burglar alarm existence with infrared sensor being probe are on the market higher, infrared emission and infrared receiver are arranged on the both sides of passage or door by the utility model infrared ray audible-visual annunciator respectively, when having detected human body or object process is blocked, at once send sound and light alarm.

Below describe the guardian technique content involved in implementation process of infrared ray audible-visual annunciator described in the utility model in detail.

Utility model content

Goal of the invention and beneficial effect: in order to problems such as some shortcoming and price of solving and making up the burglar alarm existence with infrared sensor being probe are on the market higher, infrared emission and infrared receiver are arranged on the both sides of passage or door by the utility model infrared ray audible-visual annunciator respectively, when having detected human body or object process is blocked, at once send sound and light alarm.

Circuit working principle: the circuit of infrared ray audible-visual annunciator is by infrared transmitting circuit, and infrared electro change-over circuit and sound light alarming circuit form.Infrarede emitting diode D1 and resistance R1 and linear potentiometer RP forms infrared light emission circuit, resistance R1 and linear potentiometer RP is used as step-down current limliting, the size of linear adjustment potentiometer RP resistance, infrarede emitting diode D1 working current is made to be limited within 25mA, to ensure its safe and reliable work.Infrared photodiode D2 and resistance R2 forms photoelectric switching circuit, when the infrared ray light path between infrared light emission and infrared light receive is not blocked, infrared photodiode D2 converts the infrared signal that infrarede emitting diode D1 sends to electric signal, infrared photodiode D2 is made to be Low ESR (about several kilo-ohms), make NPN transistor VT1 base voltage≤0.35V, NPN transistor VT1 is in cut-off state, the collector of NPN transistor VT1 is high level, time base circuit IC1 is made to be in reset mode, time base circuit IC1 the 3rd pin exports as low level, sound light alarming circuit does not work without electricity.

When the infrared ray light path of infrared light launching and receiving is blocked, when infrared photodiode D2 does not receive the infrared light that infrarede emitting diode D1 sends, infrared photodiode D2 is that high resistant (resistance in the dark is greater than 500K Ω) makes NPN transistor VT1 base potential raise, NPN transistor VT1 saturation conduction, NPN transistor VT1 collector potential≤0.8V, make time base circuit IC1 set, time base circuit IC1 the 3rd pin is high level, NPN transistor VT2 is obtained be biased and conducting, LED is made to obtain electric being lit, hummer HA obtains electric sound of sounding a buzzer.

Accompanying drawing explanation

Accompanying drawing 1 is the embodiment circuit working schematic diagram that the utility model provides an infrared ray audible-visual annunciator, and two dotted lines in accompanying drawing 1 are the extended line of drawing, and its length should be determined as required.

Embodiment

According to the infrared ray sound and light alarm circuit fundamental diagram shown in accompanying drawing 1 and accompanying drawing explanation, and according to annexation between components and parts in each several part circuit described in utility model content, and components and parts technical parameter described in embodiment requires and circuit production main points are carried out enforcement and can be realized the utility model, is further described correlation technique of the present utility model below in conjunction with embodiment.

Technical scheme: infrared ray audible-visual annunciator, it comprises 12V direct supply, infrared light emission circuit, infrared electro change-over circuit, level signal amplification and sound light alarming circuit, it is characterized in that:

Infrared light emission circuit: it is made up of infrarede emitting diode D1 and resistance R1 and linear potentiometer RP, the model that infrarede emitting diode D1 selects is SE303, infrarede emitting diode D1 positive pole connects linear potentiometer RP one end by resistance R1, the linear potentiometer RP other end and movable end connection circuit positive pole VCC thereof, infrarede emitting diode D1 negative pole connection circuit ground GND;

Infrared electro change-over circuit: it is by infrared photodiode D2 and resistance R2, NPN transistor VT1, resistance R3, time base circuit IC1 and electric capacity C1 forms, the model that infrared photodiode D2 selects is PH202, the model that time base circuit IC1 selects is NE555, NPN transistor VT1 base stage connects infrared photodiode D2 negative pole and resistance R2 one end, resistance R2 other end connection circuit positive pole VCC, infrared photodiode D2 positive pole and NPN transistor VT1 emitter connection circuit ground GND, NPN transistor VT1 collector connecting resistance R3 one end and time base circuit IC1 the 2nd pin and the 6th pin, resistance R3 other end connection circuit positive pole VCC, time base circuit IC1 the 1st pin connection circuit ground GND, time base circuit IC1 the 5th pin is by electric capacity C1 connection circuit ground GND,

Level signal is amplified and sound light alarming circuit: it is made up of resistance R4, NPN transistor VT2, hummer HA, red light emitting diodes LED and resistance R5, time base circuit IC1 the 3rd pin connects NPN transistor VT2 base stage by resistance R4, NPN transistor VT2 collector connects negative pole and resistance R5 one end of hummer HA, another termination red light emitting diodes of resistance R5 LED negative pole, the positive pole of hummer HA and red light emitting diodes LED positive pole connection circuit positive pole VCC, NPN transistor VT2 emitter connection circuit ground GND;

12V DC power anode connection circuit positive pole VCC, 12V DC power cathode is connected with circuit ground GND.

The technical parameter of components and parts and selection requirement

D1 is infrarede emitting diode, and its model selected is SE303; D2 is infrared photodiode, and its model selected is PH202;

IC1 is time base circuit, and the model selected is NE555, or selects Ka555; Time base circuit IC1 is that 8 pin dual inline type DIP encapsulate, and each pin function is: the 1st pin is circuit ground GND; 2nd pin is trigger end; 3rd pin output terminal; 4th pin preset end; 5th pin is control voltage; 6th pin thresholding (threshold value); 7th pin is discharge end; 8th pin connection circuit positive pole VCC;

VT1, VT2 are NPN transistor, and the model selected is 2SC9013, requires enlargement factor β >=160;

Select 1/8W metalfilmresistor, resistance R1 resistance is 510 Ω, and resistance R2 resistance is 82K Ω, and resistance R3 resistance is 47K Ω, and resistance R4 resistance is 1K Ω, and resistance R5 resistance is 1.2K Ω;

RP is linear potentiometer, and its resistance is 1.5K Ω;

C1 is electric capacity, and its capacity is 0.01 μ F;

LED is red light emitting diodes, selects diameter ￠ 5mm red light emitting diodes;

HA is hummer, selects hummer to be built-in with audio generating circuit, and operating voltage is 9 ~ 10V.

Circuit production and circuit debugging

Because the circuit structure of infrared ray audible-visual annunciator is fairly simple, comparison is easy, as long as the electronic devices and components performance generally selected is intact, and the components and parts annexation to specifications in accompanying drawing 1 is welded, physical connection line and welding quality are through carefully checking correctly, and circuit of the present utility model does not substantially need to carry out debugging and can normally work;

In order to ensure monitor channel validity, can be the straight tube of 40mm in outer cover ￠ 15mm of infrarede emitting diode D1, length, to strengthen the directive property of infrared light, effective transmitting range >=7 meter of infrarede emitting diode D1;

The size of linear adjustment potentiometer RP resistance, makes infrarede emitting diode D1 working current be limited within 30mA, to ensure its safe and reliable work, burns to avoid infrarede emitting diode D1 electric current excessive;

When the infrared ray light path of infrared light emission and reception is blocked, infrared electro change-over circuit can reliably switch, if messy rapid in handoff procedure, can distinguish the resistance of suitable linear adjustment potentiometer RP, resistance R2, resistance R3 or resistance R4;

The outward appearance of circuit components layout of the present utility model, board design, infrared ray audible-visual annunciator and physical dimension etc. are not guardian techniques of the present utility model; neither the claimed technology contents of the utility model, therefore do not illustrate one by one in the description.

Claims (1)

1. an infrared ray audible-visual annunciator, it comprises 12V direct supply, infrared light emission circuit, infrared electro change-over circuit, level signal amplification and sound light alarming circuit, it is characterized in that:

Described infrared light emission circuit is made up of infrarede emitting diode D1 and resistance R1 and linear potentiometer RP, the model that infrarede emitting diode D1 selects is SE303, infrarede emitting diode D1 positive pole connects linear potentiometer RP one end by resistance R1, the linear potentiometer RP other end and movable end connection circuit positive pole VCC thereof, infrarede emitting diode D1 negative pole connection circuit ground GND;

Described infrared electro change-over circuit is by infrared photodiode D2 and resistance R2, NPN transistor VT1, resistance R3, time base circuit IC1 and electric capacity C1 forms, the model that infrared photodiode D2 selects is PH202, the model that time base circuit IC1 selects is NE555, NPN transistor VT1 base stage connects infrared photodiode D2 negative pole and resistance R2 one end, resistance R2 other end connection circuit positive pole VCC, infrared photodiode D2 positive pole and NPN transistor VT1 emitter connection circuit ground GND, NPN transistor VT1 collector connecting resistance R3 one end and time base circuit IC1 the 2nd pin and the 6th pin, resistance R3 other end connection circuit positive pole VCC, time base circuit IC1 the 1st pin connection circuit ground GND, time base circuit IC1 the 5th pin is by electric capacity C1 connection circuit ground GND,

Described level signal is amplified and sound light alarming circuit is made up of resistance R4, NPN transistor VT2, hummer HA, red light emitting diodes LED and resistance R5, time base circuit IC1 the 3rd pin connects NPN transistor VT2 base stage by resistance R4, NPN transistor VT2 collector connects negative pole and resistance R5 one end of hummer HA, another termination red light emitting diodes of resistance R5 LED negative pole, the positive pole of hummer HA and red light emitting diodes LED positive pole connection circuit positive pole VCC, NPN transistor VT2 emitter connection circuit ground GND;

Described 12V DC power anode connection circuit positive pole VCC, 12V DC power cathode is connected with circuit ground GND.