CN109798388A - A kind of infrared induction tap control system - Google Patents

Abstract

The present invention relates to a kind of infrared induction tap control system, present invention application infrared reflection principle is made of infrared transmitting circuit, infrared receiver amplifying circuit, control circuit, electromagnetism, power supply etc.；When persons or things close to when, automatically generate control signal, the actuating of relay obtains solenoid valve and electric is attracted to automatically open water source；It is on the contrary then water source is automatically closed.Compared with traditional water supply facility, the present invention can be improved the service efficiency of water resource.

Description

A kind of infrared induction tap control system

Technical field

The invention patent relates to Eletronmechanical Design Technique field more particularly to a kind of infrared induction tap control systems.

Background technique

Many people have such experience in daily life, and whenever cooking in kitchen, both hands are always stained with grease, want to use Oily both hands are opened tap and are rinsed, and worry to stay in grease on the switch of tap, cause cleaning in the future inconvenient. And for the tap in public place, with contact people more than, just have many bacteriums above, contact will take thin every time Bacterium is detrimental to health.Especially medical tap more needs to pay attention in terms of avoiding bacterial cross-infection.And for general For logical tap, it not can avoid these troubles, but induction type water-saving tap can just help you to solve these to ask completely Topic.It is automatically performed without contacting any position of faucet, water outlet and pass water by inductor, can effectively avoid bacterial cross-infection, The automatic outletting in induction range simultaneously is finished automatic turning off water feature and also plays the effect for saving water resource.

Patent of invention content

The invention patent relates to a kind of infrared induction tap control system, present invention application infrared reflection principles, by infrared The composition such as transmit circuit, infrared receiver amplifying circuit, control circuit, electromagnetism, power supply；When persons or things close to when, automatically generate Signal is controlled, the actuating of relay makes solenoid valve obtain electric be attracted to automatically open water source；It is on the contrary then water source is automatically closed.

Compared with traditional water supply facility, the present invention can be improved the service efficiency of water resource.

Detailed description of the invention

Fig. 1: reflection infrared sensor figure.

Fig. 2: voltage-stabilized power supply circuit figure.

Fig. 3: the multivibrator figure being made of timer.

Fig. 4: SFM506-38 inside schematic diagram.

Fig. 5: LM741 integrated operational amplifier figure.

Specific embodiment

In order to which the objects, technical solutions and advantages of the invention patent are more clearly understood, below in conjunction with attached drawing and implementation Example, is further elaborated the invention patent.It should be appreciated that specific embodiment described herein is only used to explain The invention patent is not intended to limit the present invention patent.

The invention patent relates to a kind of infrared induction tap control system, present invention application infrared reflection principle, by The composition such as infrared transmitting circuit, infrared receiver amplifying circuit, control circuit, electromagnetism, power supply；When persons or things close to when, automatically Control signal is generated, the actuating of relay makes solenoid valve obtain electric be attracted to automatically open water source；It is on the contrary then water source is automatically closed.

Further, present invention employs reflection infrared sensors.The transmitting and reception of infrared ray are generally using infrared Light emitting diode and infrared receiving tube are completed.When have object close to when, a part of infrared light is launched into reception pipe.It is reflective Infrared sensor is as shown in Figure 1.Reflective photoelectric sensor can be used to detect the variation of ground light and shade and color, can also visit Whether there is or not close objects for survey.The control process of infrared control automatic faucet is: when people or object is close to automatic faucet, The infrared of infrared emission photoelectric tube sending is reflected into infrared receiver photoelectric tube through people and object.Receive the reflection that photoelectric tube receives Optical signal is automatically converted to electric signal, is further amplified by subsequent conditioning circuit, shaping, decoding, and last driving circuit controls electromagnetism Valve events open water source.When manpower or object leave automatic faucet, receives photoelectric tube and do not receive reflected light signal, drive Circuit disconnects power of electromagnetic valve, to close water source.

Further, infrared ray fire hose head control circuit includes transmit circuit and reception decoding control circuit.Wherein emit Circuit is by multivibrator and infrared-emitting diode；Receiving circuit includes infrared receiving tube D1 and D2, operational amplifier LM741), tone decoder (LM567), relay K, power circuit etc. form.

Further, in transmit circuit, multivibrator is by IC(555) and R0.R1 and C7 etc. form.Its frequency of oscillation is F=1.44/(R0+2R1) C7, oscillation output signal drives LED1 ~ LED3 work of TLN104 type, to generate infrared pulse tune Wave processed.It receives infrared accepting header D1.D2 in circuit to match with the transmitting tube in transmitting, using TLN104 type.Infrared pulse tune System is converted into electric signal through D1.D2 reception pipe, is bonded to LM741 through C1 lotus root, then the 3rd pin of LM567 is input to through C2, identified Decoding, so that centre frequency f=1/1.1R6C3 is consistent with infrared modulated frequency 40KHZ, making the output of the 8th pin is low level, again After inverted, driving VT2 conducting, relay has exchange to export because control has signal triggering.When someone washes one's hands infrared beam When blocking, corresponding D1.D2 carries out photoelectric conversion because receiving optical signal, to make LM567 due to having signal input the 8th Foot output is flat for low spot, and inverted VT2 conducting, relay is attracted, and alternating voltage is switched on, to make the battery valve actuation of tap Make, water source is opened.

Further, circuit of the invention is output voltage+5V, exports electric current 1.5A regulated power supply.Its voltage transformation Device B, bridge rectifier D1 ~ D4, filter capacitor C1.C3 prevent self-excited circuit C2, C3 and a fixed three terminal regulator (7805) extremely simple and convenient to be barricaded as.200v alternating current is transformed into AC low-tension by power transformer, whole using bridge-type The rectification and filtering of current circuit D1 ~ D4 and filter capacitor C1, in the both ends the Vin and GND shape of fixed three terminal regulator LM7805 (voltage usually can be because of reasons such as the variations of fluctuation or load of line voltage for formula one not sufficiently stable DC voltage And change).This DC voltage just generates precision in the output end of regulated power supply by the pressure stabilizing of LM7805 and the filtering of C3 Height, the good DC output voltage of stability.Voltage-stabilized power supply circuit is as shown in Figure 2.

Further, oscillating circuit be one kind do not need external input signal DC energy source can be converted into having it is certain The circuit of the AC energy output of frequency, certain amplitude and certain waveform, the multivibrator being made of timer such as Fig. 3 institute Show.Since 555 internal comparator sensitivity are higher, and difference channel form is used, at this moment temperature of the frequency of oscillation by power supply The influence of variation is smaller.Therefore the second pulse signal that only need to change f by adjusting the resistance value of R1 to make its 1Hz, as gate Signal.

Further, it is infrared receive control circuit be with small-sized integrated infrared receiver/demodulation block accepting header SFM506-38 and Phase-locked loop circuit.It has small in size, and good without outer member, anti-optical jamming performance, accepts angle is wide, low in energy consumption, sensitive Spend the advantages that high.

Further, LM567 is 1 phaselocked loop audio decoding circuit, and using 8 foot dual-in-line plastic packagings, 3 feet are signal input End, working frequency are determined that 8 feet are logic output terminal by the Resistor-Capacitor Unit on 5,6 feet.IC2 and R7, C12 form oscillator, R7, C12 determine the centre frequency of IC2 internal voltage controlled oscillator, and 3 feet of LM567 are signal end, and 8 feet are logic output terminal, this is defeated It is the transistor output of 1 open collector out, maximum sink current is 100mA, and the operating voltage of LM567 is 4.75~9V, work Working frequency 0.1Hz~500kHz, static working current 8mA.When nobody washes one's hands, IC1 receives the infrared arteries and veins of transmit circuit After rushing amplified output to 3 feet of IC2,8 feet of IC2 will export low level, triode VT1 cut-off, and relay K power-off is in Release conditions, solenoid valve Y are failure to actuate, and tap is released without tap water.When being manually placed under tap, IC1 cannot receive infrared Line, the 3 foot no signals input of IC2,8 feet export high level, so that VT1 is connected, relay K is attracted, and are closed its normally opened contact, The 220VAC of solenoid valve Y is connected, Y starts to act, and so that tap is released tap water, while LED issues green light, instruction tap is just Work in the state of discharging water.Washing finishes, and after hand leaves tap, stops discharging water.Schematic diagram such as Fig. 4 institute inside the ground SFM506-38 Show.

Further, voltage amplifier circuit uses LM741 integrated operational amplifier, LM741 integrated operational amplifier such as Fig. 5 It is shown.LM741 is high-performance internally-compensated operational amplifier, low in energy consumption, is compensated without foreign frequency, has short-circuit protection and imbalance Voltage zeroing ability.

Further, tone decoder uses LM567 phase-locked loop circuit, then includes a current controlled oscillator in phaselocked loop Device (CC0), a phase discriminator and a feedback filter.This tone decoding block includes a stable phase-locked loop and a crystalline substance Body Guan Kaiguan, when the input terminal in this integrated package plus first fixed audio when, that is, can produce a ground connection square wave.When input is believed It provides saturation transistor number when in passband to switch over the ground, circuit is made of I and Q wave detector, is driven by voltage-controlled oscillator Oscillator determines decoder centre frequency.Center frequency bandwidth and output delay are independently set with outward element.

Further, three terminal regulator is a kind of standardization, the regulated power supply integrated circuit of the General Linear of seriation, with The features such as its cost low performance small in size is good, and functional reliability is high becomes most widely used a kind of list in current regulated power supply Chip integrated voltage-stabilized device.

Further, LM567 is a kind of less expensive audio pll ic, using it can with structural behavior compared with Good reflective photoelectric sensor.Square-wave signal is provided by the internal oscillator of LM567, the LED of probe is lighted, by the light popped one's head in Quick pipe receives reflected light.Amplify through triode, be converted into being sent to after voltage signal LM567 inside phase discriminator 2 it is synchronous reconcile, so If being converted to numeral output Shunt negative feedback amplifying circuit by the comparator inside LM567 afterwards has stable gain and low input Impedance can eliminate the influence of photosensitive tube capacitor, obtain good high frequency characteristics.The shortcomings that this circuit, is popped one's head in simultaneously when multiple Because frequency is close when use, interference is had once partially overlapping occurs in the hot spot of adjacent cells and causes output jitter, in addition 567 output phase discriminator reference signals are drawn from oscillating capacitance end, are almost orthogonal, demodulation effect with emitting and receiving signal Rate is very low, and prime needs magnification at high multiple.

The above description is only a preferred embodiment of the patent of the present invention, is not intended to limit the invention patent, all at this Made any modifications, equivalent replacements, and improvements etc., should be included in the invention patent within the spirit and principle of patent of invention Protection scope within.

Claims (3)

1. the present invention apply infrared reflection principle, by infrared transmitting circuit, infrared receiver amplifying circuit, control circuit, electromagnetism, The composition such as power supply；When persons or things close to when, automatically generate control signal, the actuating of relay, make solenoid valve obtain it is electric be attracted to Automatically open water source；It is on the contrary then water source is automatically closed.

2. a kind of infrared induction tap control system according to claim 1, which is characterized in that present invention employs anti- Penetrate formula infrared sensor.

3. a kind of infrared induction tap control system according to claim 1, which is characterized in that voltage of the invention is put Big circuit uses LM741 integrated operational amplifier.