CN1082282C - Household signal transmission system - Google Patents

Abstract

The present invention relates to a household signal transmission system which is composed of a transmitter and a receiver, wherein the transmitter and the receiver are inserted and arranged in a power supply socket on the wall to obtain a power supply, and household original power supply wiring is used as a medium; the transmitter has a sensing function, and transmits signals by the household power supply wiring under the presetting condition. The receiver end is provided with loads of an indicator light, a musical bell, etc. which can inform users.

Description

The signal transmission system that the household uses

The present invention relates to the signal transmission system that a kind of household uses, be meant a kind of reflector and receiver can being plugged in the supply socket of wall especially, the signal transmission system of using as the household of transmission medium by the original power-supply wiring of household.

General household is as installing alarm, and the alarm device of anti-fire all need be laid electric wire, so that with lines such as transducer, circuit and buzzers, however the not only trouble that connects up, and can destroy attractive in appearance that the household arranges.Other has a kind of radio alarm, though do not need the cloth pull the wire, often change battery, and is cumbersome, unstable again.

The purpose of this invention is to provide the signal transmission system that a kind of household uses, it can save the granny rag electric wire as transmission medium and all disadvantages and the inconvenience that cause with the original power line of household.

The present invention is achieved in that the reflector that includes in the supply socket of assigning on wall, receiver, to cooperate power-supply circuit to obtain power supply and to pass through the original power-supply wiring of general household as transmission medium, it is characterized in that: above-mentioned reflector is by transducer, timer, square-wave oscillator, with door, decoder, modulator, in all transformers form, wherein transducer can be to default situation sensitivity, wherein timer is after receiving the signal of transducer, can in Preset Time, continue to trigger square-wave oscillator, make it to produce low-frequency square-wave signal, when wherein receiving the high potential signal of timer and square-wave oscillator at the same time with door, will export high potential signal and give encoder, this encoder input is provided with thumb-acting switch, and it can be converted to code signal with the data with door and thumb-acting switch; This modulator then passes through the pulse signal of oscillator output rule as carrier wave, so that code signal is modulated; In all transformers can import the high-frequency signal after the modulation into supply socket, and can isolate power supply low frequency signal from supply socket input, disturbed in order to avoid transmit; Above-mentioned receiver is made up of middle all transformers, preprocessor, oneself receiving circuit and load, but the power supply low frequency signal that all transformer insulating power supply sockets are imported wherein only allows the high-frequency signal input; Wherein preprocessor includes coupler, filter, amplifier, wave detector and reshaper, can be with input signal filtering, amplification, detection and shaping reduction; The output of this preprocessor is connected with oneself receiving circuit, in order to be received from the launcher signal of family expenses respectively; Wherein oneself receiving circuit is to be connected with thumb-acting switch at the decoder output, with corresponding with the thumb-acting switch at encoder place, can be with the decoding of the input signal after handling, and the decoder output is provided with indicator light, bright when receiving the transmitting of reflector, the decoder output is connected with many indicator lights, make corresponding thumb-acting switch bright when transmitting so that receive, and each indicator light is in parallel with one-shot circuit respectively, continue the conducting indicator light, and the output of one-shot circuit connects of short duration holding circuit, to continue the conducting indicator light in a short time; Again, oneself is provided with delayer by the of short duration holding circuit output of receiving circuit, so as just to drive after postponing a period of time next stage music bell or relay load in parallel.

So, reflector and receiver can be by the original power-supply wiring of household as transmission mediums, and reflector during to default situation, can send signal at sensor sensing, and receiver can received signal and drive indicator light and load in good time, with the prompting user.

Wherein the transducer of reflector can be temperature sensor, sound transducer, magnetic red pipe, Smoke Sensor, gas sensor, flame sensor and knob.

Wherein oneself receiving circuit of receiver is connected with permanent holding circuit at the output of one-shot circuit, so that make the indicator light of its output continue to keep bright.

Wherein the delayer input of receiver is provided with a switch, the other end of this switch then with one of the common input of the output of delayer or, should or the just above-mentioned load in parallel of output of door.Therefore, press this switch, and when the signal that of short duration holding circuit transmits is arranged, just can drive load immediately, and needn't after delayer postpones a period of time, just drive load.

Wherein the load that delayer drove of receiver comprises a radiating circuit; This radiating circuit has an oscillator that triggered by delayer, the output pulse of this oscillator can trigger encoder, make encoder can cooperate thumb-acting switch to produce the preset coding signal, and cooperating oscillator to modulate through modulator, the high-frequency signal after will modulating by middle all transformers of receiver again imports socket into; Also be provided with a secondary receiver that is used for the receiving circuit output signal, this secondary receiver can be for being inserted in supply socket, and it receives high-frequency signal by middle all transformers, by preprocessor input signal filtering, amplification, detection and shaping are reduced again, cooperate corresponding to thumb-acting switch signal decoding by decoder again, the output of this decoder is provided with indicator light and load, so that action when receiving the transmitting of radiating circuit.

Wherein the preprocessor output of receiver is connected with a joint defence receiving circuit in parallel with oneself receiving circuit, is used to receive the launcher signal that joint defence is used; This joint defence receiving circuit is connected with thumb-acting switch at the decoder output, with corresponding with the thumb-acting switch at encoder place, can be with the decoding of the input signal after handling, and the decoder output is provided with indicator light, and can be bright when receiving the transmitting of reflector; Moreover the decoder output is provided with many indicator lights, so that make the bright of corresponding thumb-acting switch when transmitting receiving; And each indicator light is all in parallel with one-shot circuit respectively, the output of one-shot circuit is connected with permanent holding circuit simultaneously, so that make the indicator light of its output continue to keep bright, and the pulse output is connected with of short duration holding circuit, so that continue the above-mentioned load that conducting indicator light and next stage are connected with in a short time.

Wherein the relay of receiver load can connect a telephone automatic dialing system, so that when the sensor sensing of reflector arrives abnormal case, can allow telephone automatic dialing arrive predetermined place.

When wherein being the magnetic red pipe, can between transducer and timer, be connected with one-shot circuit, can only trigger timer once when guaranteeing the action of magnetic red pipe as the transducer of reflector.

The present invention has following advantage: 1, the supply socket 3,4,43 that is inserted in wall of this reflector 1, receiver 2 and secondary receiver 9 is when obtaining power supply, can pass through the original power-supply wiring of household simultaneously as transmission medium, so, needn't be between reflector 1, receiver 2 and the secondary receiver 9 again from row wiring.2, transducer 11 can be changed according to actual needs,, can reach equally when perceiving abnormal conditions, can notify user's function immediately with sensitivity as various uses.3, can use the present invention with neighbours, with as the joint defence purposes.4, the relay 72 of receiver 2 can connect a telephone automatic dialing system, or the load 95 of secondary receiver 9 telephone automatic dialing system, so that when the sensor senses abnormal case, can impel telephone automatic dialing to default local immediately.

Below in conjunction with accompanying drawing, introduce technological means of the present invention, circuit structure and effect in detail.

Fig. 1 is a transmitter circuit block diagram of the present invention.

Fig. 2 is an acceptor circuit block diagram of the present invention.

Fig. 3 is the removing circuit block diagram of receiver of the present invention.

Fig. 4 is the second acceptor circuit block diagram of the present invention.

Referring to Fig. 1 to Fig. 3, the present invention is the supply socket 3,4 that reflector 1 and receiver 2 is plugged in wall, obtain power supply to cooperate power supply circuit 31,41, and pass through the original power-supply wiring of general household as transmission medium, and power supply circuit 31,41 also is connected with storage circuit 32,42, gives apparatus of the present invention so that can continue power supply when having a power failure.

Reflector 1 is by transducer 11, timer 12, square-wave oscillator 13, formed with door 14, decoder 15, modulator 16, middle all transformers 17, and wherein transducer 11 can be temperature sensor, sound transducer, magnetic red pipe, Smoke Sensor, gas sensor, flame sensor and knob.Wherein timer 12 is behind the signal that receives transducer 11, can in Preset Time, continue to trigger square-wave oscillator 13, make it to produce low-frequency square-wave signal, and when wherein receiving the high potential signal of timer 12 and square-wave oscillator 13 at the same time with door 14, will intermittently export high potential signal and give encoder 15, these encoder 15 inputs are provided with thumb-acting switch 151,152, and it can be converted to code signal with the data with door 14 and thumb-acting switch 151,152; 16 pulse signals that pass through oscillator 161 output rules of this modulator are as carrier wave, so that code signal is modulated; In all transformers 17 can import the high-frequency signal after the modulation into supply socket 3, and can isolate from the power supply low frequency signal of supply socket 3 input, disturbed in order to avoid transmit; When wherein being the magnetic red pipe, can between transducer and timer, be connected with one-shot circuit, can only trigger timer once when guaranteeing the action of magnetic red pipe as the transducer of reflector.Above-mentioned receiver 2 is by middle all transformers 21, preprocessor 22, oneself receiving circuit 5, joint defence receiving circuit 6, load 7, remove circuit and secondary receiver 9 is formed, the power supply low frequency signal that but all transformer 21 insulating power supply sockets 4 are imported wherein only allows high-frequency signal input; Wherein this preprocessor includes coupler, filter, amplifier, wave detector and reshaper, can be with input signal filtering, amplification, detection and shaping reduction; The output of this preprocessor 22 is connected in parallel to oneself identical receiving circuit 5 and joint defence receiving circuit 6 of two circuit, the signal of the reflector of using in order to reflector 1 signal that is received from family expenses respectively or joint defence 1; This oneself receiving circuit 5 is to be connected with thumb-acting switch 511,611 at decoder 51,61 outputs with joint defence receiving circuit 6, with corresponding with the thumb-acting switch 151,152 at encoder 15 places, can be with the decoding of the input signal after handling, and decoder 51,61 outputs are provided with indicator light 512,612, and are bright when receiving the transmitting of reflector; Moreover, decoder 51,61 outputs are connected with many indicator lights 513,613, so that receive corresponding thumb-acting switch 151,152 is become clear, and each indicator light 513,613 is in parallel with one- shot circuit 52,62 respectively, wherein oneself receiving circuit of receiver is connected with permanent holding circuit 53,63 (this sentences rest-set flip-flop as holding circuit) at the output of one- shot circuit 52,62, so that make the indicator light 531,631 of its output continue to keep bright.And the output of one- shot circuit 52,62 connects of short duration holding circuit 54,64 (being to connect a delayer to form between the R of rest-set flip-flop input and Q output) herein, to continue conducting indicator light 541,641 in a short time; Again, oneself is provided with delayer 23 by of short duration holding circuit 54 outputs of receiving circuit 5, so as just to drive after postponing a period of time next stage music bell 71 or relay 72 or reflector 73 even loads 7 in parallel.The of short duration holding circuit 64 of joint defence receiving circuit 6 then can directly drive load 7; Simultaneously, delayer 23 inputs are provided with a switch 231, the other end of this switch then with one of the common input of the output of delayer 23 or 232, should or the just above-mentioned load 7 in parallel of output of door 232.Therefore, press [ON] this switch, and when of short duration holding circuit 54 transmits signal, just can drive load 7 immediately, and needn't postpone just to drive load 7 after a period of time through delayer 23.

This radiating circuit 73 has an oscillator 731, triggered by delayer 23 (the not conducting of switch 231 this moment) or of short duration holding circuit 54 (switch 231 conductings this moment), and the output pulse by oscillator 731 can trigger encoder 732, make encoder 732 cooperate thumb-acting switch 733,734 to produce default code signal, and cooperating oscillators 736 to be modulated through modulator 735, the high-frequency signal after will modulating by middle all transformers 21 of receiver 2 again imports supply socket 4 into.

This removing circuit 8 is the one termination power+V at the clear switch 81 of one three contact, its other two ends then can connect an one- shot circuit 82,83 respectively, the output of two one- shot circuit 82,83 then can be connected to the permanent holding circuit 53,63 and the of short duration holding circuit 54,64 of oneself receiving circuit 5 and joint defence receiving circuit 6, so that these circuit are removed; Simultaneously, the power input of one- shot circuit 82,83 can be connected with indicator light 821,831, to become clear along with the input of power supply, and the output of an one one-shot circuit 83 connects an of short duration holding circuit 832, so that during the power supply input, can keep an indicator light 833 to be bright state at short notice.Moreover, but the B contact of a relay 222 between preprocessor 22 and oneself receiver 5 of the input interlock of this indicator light 833, so when start, this of short duration holding circuit 832 can make indicator light 833 continue in the short time bright, and the B contact that makes relay 222 opens circuit (OPEN), and has the removing circuit function.In addition, after this blink, indicator light 833 extinguishes, and the B contact of relay 222 reverts to short circuit (ON) state, makes circuit recover normal inital status; Be provided with a switch 221 again between preprocessor 22 and oneself receiver 5, and 81 of clear switches and these switch 221 interlocks.

Referring to Fig. 4, secondary receiver 9 is mainly used to receive the signal of radiating circuit 73, it equally can be for being inserted in supply socket 42, and it receives high-frequency signal by middle all transformers 91, by preprocessor 92 input signal filtering, amplification, detection and shaping are reduced again, cooperate corresponding to the thumb-acting switch 931 of thumb-acting switch 733 with to signal decoding by decoder 93 again, the output of this decoder 93 is provided with indicator light 94 and load 95 (as buzzer), so that action when receiving the transmitting of radiating circuit 73.

During use, can be with the present invention as two kinds of the joint defence purposes of oneself signal transmission purposes and the transmission of associating neighbours common signal, and at these two kinds of purposes, every family need select two reflectors 1 and a receiver 2 at least for use, to use and joint defence usefulness as oneself signal transmission; Simultaneously, need identically with thumb-acting switch 511 codings of oneself receiving circuit 5 of receiver 2 as the thumb-acting switch 151 from the reflector 1 of family expenses, and that the thumb-acting switch 151 of the reflector 1 that joint defence is used needs is identical with the thumb-acting switch 611 of the joint defence receiving circuit 6 of receiver 2.

As oneself signal transmission purposes, the difference that user Ke Yi uses is inserted in reflector the supply socket 3 of desiring sensitive sites.To desire fire preventing is example, and this reflector 1 can assign into the supply socket 3 in the place of fire hazardous such as kitchen, and its transducer 11 be temperature sensor, simultaneously, receiver 3 is plugged in the supply socket 4 in obvious place such as parlor or bedroom.The thumb-acting switch 151 that also will stir reflector 1 is to set the address of oneself envisioning, can prevent from also to use identical reflector 1 because of the next door household, so that oneself receiver 2 mistakes are received the signal that next door household's reflector 1 is launched, and the thumb-acting switch 511 of oneself receiving circuit 5 of receiver 2 is the address of the corresponding thumb-acting switch 151 of need also, simultaneously, stir the address that another thumb-acting switch 511 also needs corresponding thumb-acting switch 151.

When transducer 11 sensitivities of reflector rise to temperature, can output signal to timer 12, this timer 12 can continue to trigger square-wave oscillator 13 in Preset Time, and when receiving the high potential signal of timer 12 and square-wave oscillator 13 at the same time with door 14, can export high potential signal and give encoder.In fact, should be identical with the output signal of the output signal of door 14 and square-wave oscillator 13, its objective is promptly that also the square wave oscillation signal that utilizes square-wave oscillator 13 to be produced triggers encoder 15, encoder 15 can cooperate the data of thumb-acting switch 151,152 to be converted to code signal, and modulator 16 can cooperate oscillator 161 to give demodulation with code signal, and middle all transformers 17 then import this restituted signal into supply socket 3.

Moreover, receiver 2 can be via middle all transformers 21 from supply socket 4 received signals, and pass through preprocessor 22 with signal filtering, amplify, detection, shaping, then, the decoder 51 of oneself receiving circuit 5 can cooperate thumb-acting switch 511 with signal decoding, during signal that the reflector 1 in oneself of this signal is sent, indicator light 512 will become clear, and decoder 51 also can make the indicator light 513 of corresponding thumb-acting switch 152 bright, to allow the user learn this reflector position, simultaneously, one-shot circuit 52 can trigger permanent holding circuit 53 and of short duration holding circuit 54 respectively; This permanent holding circuit 53 can make indicator light 531 permanent bright to remind the user, unless push switch 221 makes clear switch 81 interlocks, makes permanent holding circuit 53 be removed circuit 8 and removes, just indicator light 531 can extinguish; This of short duration holding circuit 54 (as 3-5 minute) at short notice continues to trigger indicator light 54 and delayer 23, and this delayer 23 just drives load 7 after will postponing a period of time.When time that the user does not have delayer and postponed, but push switch 231, make load 7 driven by of short duration holding circuit 54, load 7 is driven back music bell 71 and can rings informing the user, and relay 72 can be by excitatory and trigger the various loads (as alarm bell or photoflash lamp etc.) that subordinate connected.

The radiating circuit 73 of load 7 is for signal is set up at the secondary receiver 9 that plugs elsewhere supply socket 43, its still by the original power-supply wiring of household as transmission medium.Wherein the thumb-acting switch 733,734 of radiating circuit 73 is identical with thumb-acting switch 931 codings of secondary receiver 9.When radiating circuit 73 is subjected to delayer 23 (the not conducting of switch 231 this moment) or of short duration holding circuit 54 (switch 231 conductings this moment) when triggering, oscillator 731 can touch encoder 732, and encoder 732 can cooperate thumb-acting switch 733,734 to produce default code signal, and cooperating oscillators 736 to modulate through modulator 735, the high-frequency signal after will modulating by middle all transformers 21 of receiver 2 again imports supply socket 4 into.In addition, secondary receiver 9 can receive high-frequency signal by middle all transformers 91, and pass through preprocessor 92 with input signal filtering, amplification, detection and shaping reduction, cooperate 931 pairs of signal decodings of thumb-acting switch by decoder 93 again, when this signal be radiating circuit 73 exported signal the time, indicator light 94 can be bright, and load 95 (as buzzer or photoflash lamp etc.) can be driven and reminds people.

Therefore, the user can plug some reflectors 1 so that perception is preset situation and sent signal in the supply socket 3 of oneself housing appropriate location, and can plug receiver 1 so that when receiving this signal in supply socket 4, drive indicator light 512,513,531,541, music bell 71 and can be for connecting various loads (as buzzer or photoflash lamp etc.), to remind the user, and this receiver 1 has radiating circuit 73, the load 93 that can trigger this place to the secondary receiver 9 that plugs elsewhere supply socket 43 to transmit (as buzzer etc.) to remind the user, so, all do the signal transmission by the original power-supply wiring of household.

In addition, the present invention is as the joint defence purposes, and the neighbours that oneself and desire are participated in joint defence all need to plug reflector 1 and receiver 2 in supply socket 3,4, and the thumb-acting switch 151 of all reflectors 1 is identical with thumb-acting switch 611 codings of the joint defence receiving circuit 6 of receiver 2; Because joint defence receiving circuit 6 is identical with oneself circuit of receiving circuit 5, have only its thumb-acting switch 611 different, so the operation principle of joint defence circuit 6 is identical with above-mentioned oneself operation principle of receiving circuit 5 with 511 codings.At this, be summarized as follows:

Responsive after the precognition situation with the transducer 11 of reflector 1 when certain tame joint defence, reflector 1 can the encoded device 15 of output cooperates thumb-acting switch 151,152 codings and through the signal of modulator 16 modulation; Then, receiver 2 can be handled in addition filtering of signal, amplification, detection and shaping by preprocessor 22, and joint defence receiving circuit 6 can cooperate thumb-acting switch 611 with signal decoding by encoder 61, make the indicator light 613 of corresponding thumb-acting switch 152 bright again, to allow the user know the position of this reflector, simultaneously, one-shot circuit 62 can trigger permanent holding circuit 63 and of short duration holding circuit 64, make indicator light 631,641 bright, and drive music bell 71, relay 72 or the radiating circuit 73 of load 7; In addition, when the secondary receiver 9 of elsewhere is received the signal of radiating circuit 73, also can drive load 95 and make corresponding action.

Because oneself receiving circuit 5 of receiver 2 and joint defence receiving circuit 6 are in parallel, so this receiver 2 can be received from family expenses and the joint defence signal with reflector 1 emission simultaneously.

In addition, the transducer 11 of reflector 1 can change according to actual needs, for example uses sound transducer as transducer 11, and reflector 1 is placed in the supply socket 3 of infant room wall, when the baby crys, just can know immediately that the adult of receiver 2 ends the baby has wakeeed up.For another example, as transducer 11, and reflector 1 is placed near the supply socket 3 of the wall door and window, when the ruffian swarms within doors, just can knows the user of receiver 2 ends with infrared ray sensing, and can be with the next door housing as the joint defence purposes.

Wherein the relay 72 of receiver 2 can connect a telephone automatic dialing system, or the load 95 of secondary receiver 9 can be the telephone automatic dialing system, so, when fire or ruffian swarm within doors, can make telephone automatic dialing give default place (as fire brigade or police office etc.).

Claims (8)

1, the signal transmission system that a kind of household uses, include the reflector in the supply socket of assigning on wall, receiver, to cooperate power-supply circuit to obtain power supply and to pass through the original power-supply wiring of general household as transmission medium, it is characterized in that: above-mentioned reflector is by transducer, timer, square-wave oscillator, with door, decoder, modulator, in all transformers form, wherein transducer can be to default situation sensitivity, wherein timer is after receiving the signal of transducer, can in Preset Time, continue to trigger square-wave oscillator, make it to produce low-frequency square-wave signal, when wherein receiving the high potential signal of timer and square-wave oscillator at the same time with door, will export high potential signal and give encoder, this encoder input is provided with thumb-acting switch, and it can be converted to code signal with the data with door and thumb-acting switch; This modulator then passes through the pulse signal of oscillator output rule as carrier wave, so that code signal is modulated; In all transformers can import the high-frequency signal after the modulation into supply socket, and can isolate power supply low frequency signal from supply socket input, disturbed in order to avoid transmit; Above-mentioned receiver is made up of middle all transformers, preprocessor, oneself receiving circuit and load, but the power supply low frequency signal that all transformer insulating power supply sockets are imported wherein only allows the high-frequency signal input; Wherein preprocessor includes coupler, filter, amplifier, wave detector and reshaper, can be with input signal filtering, amplification, detection and shaping reduction; The output of this preprocessor is connected with oneself receiving circuit, in order to be received from the launcher signal of family expenses respectively; Wherein oneself receiving circuit is to be connected with thumb-acting switch at the decoder output, with corresponding with the thumb-acting switch at encoder place, can be with the decoding of the input signal after handling, and the decoder output is provided with indicator light, bright when receiving the transmitting of reflector, the decoder output is connected with many indicator lights, make corresponding thumb-acting switch bright when transmitting so that receive, and each indicator light is in parallel with one-shot circuit respectively, continue the conducting indicator light, and the output of one-shot circuit connects of short duration holding circuit, to continue the conducting indicator light in a short time; Again, oneself is provided with delayer by the of short duration holding circuit output of receiving circuit, so as just to drive after postponing a period of time next stage music bell or relay load in parallel.

2, the signal transmission system used of household as claimed in claim 1, it is characterized in that: wherein the transducer of reflector can be temperature sensor, sound transducer, magnetic red pipe, Smoke Sensor, gas sensor, flame sensor and knob.

3, the signal transmission system used of household as claimed in claim 1, it is characterized in that: wherein oneself receiving circuit of receiver is connected with permanent holding circuit at the output of one-shot circuit.

4, the signal transmission system used of household as claimed in claim 1, it is characterized in that: wherein the delayer input of receiver is provided with a switch, the other end of this switch then with one of the common input of the output of delayer or, should or the just above-mentioned load in parallel of output of door.

5, the signal transmission system used of household as claimed in claim 1, it is characterized in that: wherein the load that delayer drove of receiver comprises a radiating circuit; This radiating circuit has an oscillator that triggered by delayer, the output pulse of this oscillator can trigger encoder, make encoder can cooperate thumb-acting switch to produce the preset coding signal, and cooperating oscillator to modulate through modulator, the high-frequency signal after will modulating by middle all transformers of receiver again imports socket into; Also be provided with a secondary receiver that is used for the receiving circuit output signal, this secondary receiver can be for being inserted in supply socket, and it receives high-frequency signal by middle all transformers, by preprocessor input signal filtering, amplification, detection and shaping are reduced again, cooperate corresponding to thumb-acting switch signal decoding by decoder again, the output of this decoder is provided with indicator light and load, so that action when receiving the transmitting of radiating circuit.

6, the signal transmission system used of household as claimed in claim 1, it is characterized in that: wherein the preprocessor output of receiver is connected with a joint defence receiving circuit in parallel with oneself receiving circuit, is used to receive the launcher signal that joint defence is used; This joint defence receiving circuit is connected with thumb-acting switch at the decoder output, with corresponding with the thumb-acting switch at encoder place, can be with the decoding of the input signal after handling, and the decoder output is provided with indicator light, and can be bright when receiving the transmitting of reflector; Moreover the decoder output is provided with many indicator lights, so that make the bright of corresponding thumb-acting switch when transmitting receiving; And each indicator light is all in parallel with one-shot circuit respectively, the output of one-shot circuit is connected with permanent holding circuit simultaneously, so that make the indicator light of its output continue to keep bright, and the pulse output is connected with of short duration holding circuit, so that continue the above-mentioned load that conducting indicator light and next stage are connected with in a short time.

7, the signal transmission system used of household as claimed in claim 1, it is characterized in that: wherein the relay of receiver load can connect a telephone automatic dialing system, so that when the sensor sensing of reflector arrives abnormal case, can allow telephone automatic dialing arrive predetermined place.

8, the signal transmission system used of household as claimed in claim 1 is characterized in that: when wherein being the magnetic red pipe as the transducer of reflector, can be connected with one-shot circuit between transducer and timer, can only trigger timer once when guaranteeing the action of magnetic red pipe.

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