CN2049778U - Infrared receiver-transmitter - Google Patents

Abstract

The utility model relates to an infrared transceiver which is suitable for alarming, counting, and remotely controlling, comprising a transmitter, and a receiver. The transmitter is composed of a transmitting assembly, and a corresponding circuit; the receiver is composed of a receiving assembly, and a corresponding circuit. The transmitting assembly is a paraboloid reflecting cover whose focus is provided with an infrared transmitting tube. The receiving assembly is a paraboloid reflecting cover whose focus is provided with a photodiode; the reflecting cover is fixed on a wire line board with a rubber ring.

Description

Infrared receiver-transmitter

The utility model is a kind of infrared transceiver, belongs to warning, counting assembly, is applicable to warning, counting and remote control.

In the prior art, the transmitter of infrared transceiver or the emission of receiver or receiving unit are finished the focussing force of light signal by convex lens.This structure exists not only that eyeglass is easy to fragmentation, focal length is long and the big defective of product size; And owing to, must use optical glass, thereby lead the cost height with common eyeglass decay infrared signal.In addition, prior art also exists shortcomings such as poor reliability and operating distance is near.

The purpose of this utility model is to avoid the above-mentioned weak point of prior art and provides that a kind of volume is little, cost is low, operating distance is far away and security and the high infrared transceiver of reliability.

The technical solution that realizes above-mentioned purpose is: a kind of infrared transceiver, comprise transmitter and receiver, and transmitter or receiver are made up of emission or receiving unit and related circuit thereof.

It is characterized in that said emitting module has one to be used for the reflecting cover of paraboloid that light focuses on, on its focus, place an infrared emission tube, and be fixed in the circuit board with a rubber ring.Said receiving unit also has one to be used for the reflecting cover of paraboloid that light focuses on, and places a photoelectric receiving device on its focus, is fixed in the circuit board with a rubber ring equally, adopts rubber ring to fix, and helps improving the vibration resistance of assembly.Reflecting cover of paraboloid available metal material or nonmetallic materials are made, but reflecting surface should be made the such smooth finish of similar minute surface.

The purpose of this utility model realizes by following technical measures that also the circuit difference from prior art of transmitter is that the receiving end of transmitter has two signal oscillators, promptly produces high frequency f ₁High frequency oscillator and produce low frequency f ₂LF oscillator.f ₁And f ₂After the gate circuit mixing and amplifying, can improve pulse power, improve light intensity, thereby strengthened transmitting range.The prior art difference that the circuit of receiver and resonance amplify is, adds large action-range with phaselock technique.Adopt the PLL digital PLL circuit, it is strong to detect the feeble signal ability.It only detects the corresponding light identical with transmission frequency, thereby can prevent flase drop, has improved reliability and sensitivity greatly, and strengthened operating distance, and general oscillator amplifier circuit, electric signal must could be differentiated more than 1V, adopt phaselock technique, can differentiate the electric signal that 0.5V is above.

The utility model compared with prior art has following advantage: because the technical scheme that the utility model proposes is to finish the focussing force of light signal with the reflecting cover of paraboloid of emission or receiving unit, convex lens that need use optical glass to make not, thereby cause product with compact structure, volume little, advantage such as cost is low.Required reflecting cover of paraboloid, manufacturing process is simple, even can buy from the market.In addition,, thereby improved pulse power and light intensity, strengthened transmitting range because the circuit receiving end of transmitter has two signal oscillators; The circuit of receiver has strengthened operating distance with phaselock technique, and can prevent flase drop.Therefore, the infrared transceiver of the utility model design has also that operating distance is far away, advantages such as reliability and sensitivity height.Coverage can reach 800 meters.

Fig. 1 is the electric theory diagram of transmitter.［ 1 ］-high frequency oscillator; ［ 2 ］-LF oscillator; ［ 3 ］-gate circuit; ［ 4 ］-amplification driving circuit; ［ 5 ］-emitting module.

Fig. 2 is the electric theory diagram of receiver.［ 6 ］-receiving unit; ［ 7 ］-amplifier; ［ 8 ］-digital PLL circuit; ［ 9 ］-shaping circuit; ［ 10 ］-delay circuit; ［ 11 ］-signal output apparatus.

Fig. 3 is emission or receiving unit synoptic diagram.［ 12 ］-reflex housing; ［ 13 ］ power valve or photodiode; ［ 14 ］-rubber ring; ［ 15 ］-wiring board.

Embodiment: the embodiment that the utility model provides is described in detail in detail below in conjunction with accompanying drawing.

The infrared transceiver of the utility model design is made up of transmitter and receiver two parts.Fig. 1 is the electric theory diagram of transmitter.This transmitter has a high frequency oscillator ［ 1 ］ and a LF oscillator ［ 2 ］.Adopt crystal oscillator to produce high frequency f ₁Vibration is to obtain higher frequency stability.LF oscillator is made up of two utmost point phase inverters, produces f ₂Low-frequency square-wave removes to modulate high frequency f ₁f ₁And f ₂Through gate circuit ［ 3 ］ mixing.Signal after the mixing drives the infrared transmitting tube of emitting module ［ 5 ］ after amplification and driving circuit ［ 4 ］ amplify it.Amplifying circuit adopts discrete component to amplify.Components of drive circuit adopts the triode of high-current switch, i.e. 8050 plastic packaging triodes, and immediate current can reach 1A.

Fig. 2 is the electric theory diagram of receiver.The infrared receiving unit ［ 6 ］ of this receiver converts faint infrared light to electric signal and delivers to amplifier ［ 7 ］, carries out low noise and amplifies.Signal after the amplification is sent into digital PLL circuit ［ 8 ］ and is carried out frequency-selecting, and this circuit can be used TA7343P, CD4049 or LM567, has effect same.Then, the frequency-selecting signal is sent into shaping circuit ［ 9 ］, shaping circuit adopts the CD106 schmitt inverter.Signal after the shaping is sent into integrator delay-time circuit ［ 10 ］.Signal output apparatus ［ 11 ］ adopts common electrical magnetic relay JRC-9.

Emitting module or receiving unit include reflecting cover of paraboloid ［ 12 ］, infrared transmitting tube or photodiode ［ 13 ］, rubber ring ［ 14 ］ and wiring board ［ 15 ］.Reflex housing has the cylindric link of 10 millimeters of diameters, is used to insert in the rubber ring.The rubber ring internal diameter is slightly less than 10 millimeters, utilizes the elasticity of rubber ring and the link wringing fit of reflex housing.The edge center of rubber ring has 2 millimeters groove, and wiring board ［ 14 ］ is snapped in this groove.

The infrared transceiver that present embodiment is made, coverage can reach 800 meters.

Claims (2)

1, a kind of infrared transceiver, comprise transmitter and receiver, transmitter and receiver is by emission or receiving unit and related circuit composition thereof, it is characterized in that: said emitting module is a reflecting cover of paraboloid of placing an infrared transmitting tube on its focus, and said receiving unit is a reflecting cover of paraboloid of placing a photelectric receiver on its focus.

2, infrared transmitter according to claim 1 is characterized in that said emission or receiving unit all have one with the fixing rubber ring in the circuit board of its reflecting cover of paraboloid.