CN85105820A - Vital safety monitoring circuit - Google Patents

Abstract

Life safety monitoring circuit comprises an electromagnetic transducer, and converter is delivered to periodic signal on the arm of balanced bridge network of a pair of input end and pair of output.The solid switch circuit jumps on a pair of input end.Operational amplifier jumps on the pair of output.Optically coupled circuit is linked operational amplifier, when solid switch not conducting of circuit and critical element is damaged or during circuit erroneous action, produce the output signal corresponding to the periodic inspection signal.

Description

Vital safety monitoring circuit

This invention is the invention of a relevant vital safety monitoring circuit, in more detail, be about improving output driver circuit, so that on selected element by checking that induction of signal sends into network of electrical bridge, check out the electric state that is presented, when selected element bridge balancing during at first electric state, suppose selected element at second electric state, it is uneven that bridge circuit just becomes.

In various control system, pulse code track circuit as railway and the railway network and/or quick transport operation, it is useful on each location, roadside this control system being set all, location, roadside adjacent tracks partly links to each other, and a centre data treating apparatus (CPU) provides control and/or data processing for a pair of transmitter and receiver altogether.Transmitter and receiver are linked to an end of each track, that is to say, are linked on the rail of respective carter part.The centre data treating apparatus is relevant with local conditional, and produces the pulse code of launching to both direction by railroad track.Each treating apparatus is also with the pulse code that receives, to deposit the data that obtain from the rail portion other end that links.In fact, the preferably solid-state microprocessor device of data processing equipment can obtain any common commercial product rapidly from numerous electric appliances plant theres.The storer of CPU and necessity share or joins use, and as the programmable read-only memory (prom) device, this device is includable.CPU is receiving inputted signal from the local device that detects train situation and transportation condition also, and notes other data of being reported.The data that receive are deposited with in the solid delay line, and are used to control the flow of traffic, and finish other function.Processor device is also monitored the operation of output register lag line, from the next input signal of roadside logic, and by using monitoring device and feedback signal to finish other function.Determine that system works is normal and compare with expected results when consistent that when these performance tests and monitoring device CPU just produces a signal that predetermined special feature is arranged.When this signal is sent to local power supply, in that place, location system and device is begun power supply, just there has been the energy in system.The continuous working of the special use check signal deciding power supply that comes from processor device, and the check signal stop can to make power interruption.When any one that unsuitable operation or system unit is arranged when indication is out of order, all can open circuit in any appointed positions system, to ensure the safety of human life or security of system.

In fact, theme of the present invention is to propose a kind of life security circuit that is used to monitor electric situation on the outlet terminal.

Another theme of the present invention be propose a kind of be used to check the improvement that is presented on electric state on the output terminal supervisory circuit.

Further theme of the present invention is to propose a kind of electronic circuit that is used to monitor the uniqueness of output situation.

It is to propose a kind of electronic monitoring circuit that is used for the round of visits signal(l)ing condition that the present invention also has another theme.

The present invention also have further theme be a kind of new improvement is proposed circuit, be used for monitoring the check signal of delivering to balanced bridge network.

It is the life electronic circuit that proposes a kind of charged bridge network, operational amplifier and photo-coupler that the present invention has a theme again, is used for providing special signal to data processing equipment, and treating apparatus produces the special signal that is sent to network of electrical bridge by converter.

It is to propose a kind of life circuit that the present invention has further theme again, comprise a converter, converter is coupled to periodic signal on an arm of network of electrical bridge, network of electrical bridge has a pair of input end and output terminal, an on-off circuit that is connected across on a pair of input end, an amplifying circuit that is connected across on the pair of output, and the coupled circuit of linking amplifying circuit, when not conducting of on-off circuit and critical element when damaged or circuit working when undesired, produce a output signal corresponding to periodic signal.

The additional theme of the present invention is to propose a kind of life safety monitoring circuit, comprise first device that the check signal is provided, second device from the first device acceptance inspection signal, be coupled to second device so that make second device meet the requirements of the 3rd device, when supposition the 3rd device makes the second device balance, for the amplified inspection signal is coupled to the 4th device of second device, and produce continuously the check signal makes the check signal that reception till second device is uneven condition amplified up to supposition the 3rd device the 5th device.

From the front that description of drawings here connects consideration is described in detail, chat theme of the present invention and further feature advantage before recognizing very soon.

Single figure is the schematic block diagram of a life security electronic monitoring circuit, is enforcement schematic diagram of the present invention.

With reference to the accompanying drawings, show the best block diagram of implementing of electronics output driver life security type of check output situation here, so that determine corresponding to the output situation that is stored in state in the microprocessor.Just as shown in the figure, solid-state supervisory circuit comprises that each arm has four substitutional resistance R1, R2, R3 and R4(original text herein for R7, and is wrong-annotation of translation) balanced bridge network BN.Can also see that low end of resistance R 1 is connected on the common lead L1, L1 links the end of negative voltage power supply-V.A higher end of resistance R 1 is linked resistance R 2 than low side, forms the first output terminal OT1.Resistance R 2 higher-end are linked resistance R 5 than low side, and R5 is the resistance that and R1, R2, R3 and R4 resistance value are compared small resistance value.So resistance R 2 and R5(original text are R1, and be wrong-annotation of translation) between node form first input end IT1.The higher-end of resistance R 5 is linked positive voltage source+V end.As shown in the figure, directly the linking on the common lead L1 of resistance R 3 than low side, L1 works as the second input end IT2.The higher-end of resistance R 3 link resistance R 4 than low side, form the second output terminal OT2.Resistance R 4 is linked the lead-in wire L2 of positive voltage source+V by the Low ESR secondary coil of an electromagnetic transducer T1, and this converter T1 will be described in detail in the back.The higher-end of resistance R 4 is clearly directly linked first input end by Low ESR and resistance R 5 that the converter secondary coil presents.Here can see that on-off circuit jumps on the resistance R 1 and R2 of network of electrical bridge BN, the on off state circuit comprises a NPN transistor Q1, and this transistor has an emitter e 1, base stage b1, collector c1.Emitter e 1 is linked the second input end IT2, and collector C1(original text is C2; Original text is wrong-annotation of translation) link first input end IT1, and first input end forms output terminal B to transistor switching circuit.Base stage b1 links the input end A of transistor switching circuit.

As shown in the figure, two of resistor network BN output terminal OT1 and OT2 link respectively on the just non-conversion terminal and negative conversion terminal C and D of operational amplifier OA.Operational amplifier can be monolithic RM741, and its output terminal is linked the E end by current-limiting resistance R6.Can see that output terminal E links the light emitting diode D1 anode a1 that isolates photo-coupler OC, and the negative electrode K1 of diode D1 links common lead L1.Photo-coupler OC comprises a photosensitive NPN transistor Q2, and Q2 has base b2 launch site e2 and collecting zone C2.The emitter of launch site e2 is directly linked common lead L1, and the collector of collecting zone C2 is then linked positive supply+B by pull-up resistor R7.Output terminal F links on the input end of central data processing unit or solid microprocessor, as shown in the block scheme being the MC6809 type CPU that uses always.The solid microprocessor CPU can be any model in the prior art, possess enough storeies, with railway or the railway network and/or fast the pulse code track circuit system operation of transport operation combine, carry out various functions.

As shown in the figure, a pair of output lead OL1 and OL2 interconnect between microprocessor and converter primary coil P1.If microprocessor CPU receives all that be fit to or correct information data, the check signal just is sent to primary coil P1 by output line OL1 and OL2, the check signal can be a continuous impulse, and the frequency of 500Hz is for example arranged, or presses the recurrent pulse that selected fixed intervals occur.In addition, from seeing here, another output lead OL3 of microprocessor CPU links input end A by isolating photo-coupler OC1, and this input end A links the base stage b1 of switching transistor Q1 again.Photo-coupler OC and OC1 make positive supply+B and voltage source+V and-V carries out necessary isolation.

In the narration operation, to suppose and do not touch supervisory circuit, each parts are suitably operation all, and normal information data is being sent to microprocessor CPU.In this case, switching transistor is nonconducting state, exchanges the primary coil P1 that the check signal is delivered to converter.An AC signal is sensed secondary coil S1.Because the nonconducting state of transistor Q1, in fact output terminal OT1 and OT2 are the level of DC voltage.So, be presented on exchanging pulsation and can make the voltage of output terminal OT2 rise or descend on arm resistance R3 and the R4 along with output terminal OT1 voltage.Like this, operational amplifier is just with the rate conversion switch of AC ripple same frequency or be lockable.So, the amplifier output of E end just will make the hypermutation bias voltage be added to transistor Q2 by light emitting diode D1 forward and backward, make Q2 according to exchange the pulsation the frequency-changeover switch state, pass to the input end of microprocessor in the AC signal of F end, make this situation aggravation, promptly reduce the energize of switching transistor Q1, first input end IT1 and B end is+the V state, microprocessor will continue to produce the check signal, with the electricity condition of monitoring transistor Q1 and the level of output terminal B.

Now let us is supposed the state that microprocessor CPU for a certain reason becomes out switching transistor Q1, and the conducting of transistor Q1 causes that the level of IT1 and B end descends.In fact, the parameter of circuit component designs, and makes the direct current fall of IT1 end more than the peak-to-peak value that exchanges pulsation, so that the voltage of output terminal OT1 can not surpass the voltage of OT2 end.The voltage of the input end D of operational amplifier remains on than the positive state of input end C voltage continuing.Therefore, operational amplifier OA supposition is in steady state (SS), still keeps the negative voltage normality of output terminal E.The last shortage that exchanges pulsation of output terminal F makes CPU identify the B point and IT1 no longer is+the V state.If it is described to resemble this situation, CPU has caused that Q1 reduces energy and supplies with and make B point and the decline of IT1 terminal voltage, and the shortage of F point alternating voltage is exactly desired state.If it is exactly to indicate one or more component wear, result that B point and IT1 terminal voltage are descended that the state that Q1 does not convert to open by CPU, F point exchange the shortage of pulsation.By the shortage of this interchange of sensing pulsation, the CPU suitably action of having the ability has the energy of problem circuit to supply with as minimizing, and control is added to+the supply voltage (not shown) of the restriction of having ready conditions of B end.

This point is valuable, be that aforementioned the present invention is a kind of signal, be not that the present invention is only limited to described accurate enforcement and other variation, those prior aries can be improved and conversion in additional extent of competence, and do not break away from spirit of the present invention and scope.

Claims (20)

1. According to the invention of having stated, I ask to use the patent protection of written form the present invention as new technology, and the requirement assurance is:

   1, life safety monitoring circuit comprises first device that the check signal is provided; Second device from the first device acceptance inspection signal; For keeping the second unit state condition to be coupled to the 3rd device of second device; When the 3rd device makes second device be equilibrium condition, be incorporated into the 4th device of second device for the amplified inspection signal; And produce the check signal continuously, make the reception till second device presents uneven condition amplify the 5th device of checking signal up to the 3rd device.
2. 2, life safety monitoring circuit describes in detail as claim 1, and said here first device comprises an electromagnetic transducer one by one.
3. 3, life safety monitoring circuit, as described in claim 1, said second device comprises a balanced bridge network.
4. 4, life safety monitoring circuit, such as claim 3 detailed description, said balanced bridge network comprises a resistance circuit that four arms are arranged.
5. 5, life safety monitoring circuit, such as claim 1 detailed description, said the 3rd device comprises a solid switch device.
6. 6, life safety monitoring circuit, such as claim 5 detailed description, said solid switch device comprises the NPN transistor of a not conducting of normal condition.
7. 7, life safety monitoring circuit, such as claim 1 detailed description, said the 4th device comprises an operational amplifier.
8. 8, life safety monitoring circuit, such as claim 1 detailed description, said the 5th device comprises a photo-coupler with light emitting diode and photodiode.
9. 9, life safety monitoring circuit, such as claim 4 detailed description, said first device includes a converter of linking the secondary winding of one of four arm resistance circuits arm.
10. 10, the life circuit comprises the converter that periodic signal is coupled to one of them arm of network of electrical bridge of first pair of input end and pair of output; Be connected across the on-off circuit of a pair of input end; Jump to the amplifying circuit of a pair of input end; When on-off circuit was the damaged or circuit erroneous action of nonconducting state and critical element, the coupled circuit of linking amplifying circuit produced the output signal corresponding to periodic signal.
11. 11, life circuit describes in detail as claim 10, and said here network of electrical bridge is four branch road resistance circuits of a balance.
12. 12, life circuit describes in detail as claim 10, and said here on-off circuit comprises a NPN transistor.
13. 13, life circuit, such as claim 10 detailed description, said coupled circuit comprises photo-coupler.
14. 14, life circuit, such as claim 10 detailed description, said here network of electrical bridge comprises an in fact substitutional resistance group.
15. 15, life circuit, such as claim 10 detailed description, said here coupled circuit comprises a light emitting diode and photistor.
16. 16, life circuit, such as claim 10 detailed description, said here amplifying circuit comprises an operational amplifier.
17. 17, life circuit, such as claim 10 detailed description, said here on-off circuit comprises a solid state device, when circuit is conducting state, the network of electrical bridge imbalance.
18. 18, life circuit, such as claim 10 detailed description, said here periodic signal is a pulsating volage.
19. 19, life circuit, such as claim 14 detailed description, said converter comprises a secondary winding, windings in series is on a resistance of actual substitutional resistance group.
20. 20, life circuit, such as claim 10 detailed description, said amplifying circuit comprises the first input end with one of pair of output linked, and links second input end of the pair of output other end in addition.