CN2280892Y - Self-diagnosing multifunction sparger - Google Patents

Abstract

The utility model relates to a self-diagnosing multifunction sparger. The purpose of the utility model is to realize the operating status detection and the safety management of a local transducer. The structure of the utility model is that the detection, the diagnosis, the protection, the calculation, the isolation, the transformation and the limitation of the current signal of the local transducer can be realized, V/I switching signals and voltage buffering signals can be exported to a control chamber, and a communication circuit, a status indication circuit, and an alarm circuit are arranged in the process of diagnosis. The utility model has the advantages that self-diagnostic function is added, the operating status of a measurement circuit and fault conditions can be automatically displayed, the workers who are in a control room can accurately know the operating condition of the local transducer in time, and effective control and the safety management can be realized.

Description

The self diagnosis Multifunction distributor

The utility model relates to the self diagnosis Multifunction distributor between in-situ transducer and the indoor controller, realizes control and safety management to the transmitter duty.

In background technology, the distributor of selling on the market is seen Figure 13, Fig. 1, is reached Fig. 3 to shown in Figure 7, explain with Fig. 1, in distributor, power supply unit is powered to on-the-spot two-wire system transformer through current limliting with 24V voltage, simultaneously, in-situ transducer detects the signal DC4～20mA current signal of duty output, computing, sound insulation becomes DC4～20mA and DC1～5V output to the DC electrical signal conversion after isolating.There is following weak point in practice in its distributor, and 1. the distributor of selling on the market is a black box product, and product self does not have any pilot lamp, and one does not know whether product is in duty; Two do not know whether product is in normal operating conditions; The 3rd, do not know to measure that the loop occurs is which class fault.2. distributor generates the control system very flexible at present.Because of the function of distributor is few, generation system needs other supporting instrument many, simultaneously because of distributor output fixedly the signal of specification make troubles to more supporting Measurement and Control System.3. because the Measurement and Control System that this distributor generates is that output signal according to distributor is a foundation to the judgement of measuring the loop, so warning, detection system poor reliability that distributor generates, make to have following unfavorable factor like this: the one, the foundation of judging is not direct signal from the scene, has reduced the authenticity and the reliability of distinguishing rule like this.The 2nd, because reliability, stability and the precision of distributor self work have produced influence to the differentiation credibility of follow-up instrument.4. the Measurement and Control System debugging of distributor generation at present and maintenance inconvenience, the measuring-signal loop that common distributor and transmitter constitute, transmitter is installed in the scene, and distributor is installed in the pulpit, connect with signal wire between the two, because of distributor is a kind of black box duty, can't indication measurement loop works state, failure condition, need operating personnel's in-site measurement to confirm, time-consuming taking a lot of work, and bother very much, work efficiency is low.

The purpose of this utility model is development a kind of " self diagnosis Multifunction distributor ", at background technology, addresses the problem: 1. improve the black box duty of existing distributor, increase instrumentation pilot lamp and working station indicator; 2. increase self-diagnostic function, instrument self is shown automatically measure loop works state and failure condition; 3. increase communication function and can make the staff in the pulpit, just can pass through state display screen or supervisory control comuter rapidly, accurately, know that distributor and in-situ transducer constitute the working condition and the fault state of measuring system; 4. increase warning function, can be fast, accurately, the direct alarm condition of reflected measurement signal, improve the accuracy and the reliability of reporting to the police; 5. increase converter unit and can make the output signal of distributor many flexibly just, adjust by user's demand; 6. improve system to the reaction velocity of failure condition, shorten troubleshooting time; 7. make things convenient for system debug and maintenance; 8. realize that system product satisfies the demand to different system.

Technical solution of the present utility model is as follows:

Comprise in-situ transducer current signal unit after testing; arithmetic element; isolated location exports two the tunnel; one the tunnel through limiting unit by V/I converting unit output current signal; another road through limiting unit by voltage buffer cell output voltage signal; its special character is; connection diagnostic unit and protected location between detecting unit and arithmetic element; realize that self shows measurement loop works situation and failure condition automatically; in diagnosis unit; comprise state indicating member and alarm unit; its output connects communication unit; realization passes to the staff rapidly and accurately with diagnostic result; and the state of diagnostic result shows and the warning of deadly condition; between isolated location and limiting unit, connect converter unit, realize the signal that output is flexible and changeable.

Technical solution of the present utility model also comprises:

In diagnosis unit and protected location, by in-situ transducer out ₁₃ Pin output 4～20mA current signal connects integrated IC of amplifier ₂₉To IC ₂₄With by voltage stabilizing diode D ₂₀The protected location of forming is by out ₂₀Pin is exported to the signal of protection, wherein integrated IC of amplifier ₂₉And IC ₃₀Export the bound alerting signal respectively, respectively through triode Q ₁₂And Q ₁₃The state indication light emitting diode D that connects upper limit alarm ₁₁, relay J ₄Indicate light emitting diode D with the state that lower limit is reported to the police ₁₅, relay J ₅, by relay J ₄Out ₁₄Pin and relay J ₅Out ₁₅Pin output surmounts the alerting signal of bound deadly condition, is used to detect measurement loop short circuit and the excessive integrated IC of amplifier of electric current ₃₁Export two the tunnel, the one tunnel and meet state indication light emitting diode D ₁₇, another road output terminal out ₁₆Connect the news unit, be used to detect and measure the loop and measure integrated too small IC of electric current ₃₂Export two the tunnel, the one tunnel and meet state indication light emitting diode D ₁₈, another road output terminal out ₁₇Connect the news unit, be used for the stuck circuit of detection signal, integrated IC of integrating circuit ₃₃Output is through integrated IC of subtracter ₃₄Connection is by integrated IC ₃₅～IC ₃₇The zero level recognizer of forming, its integrated IC ₃₇Export two the tunnel, the one tunnel and connect normal condition indication light emitting diode D ₁₉, another route out ₁₈Output terminal connects communication unit.

In diagnosis unit, detection signal is through IN ₉End connects integrated IC ₄₈Convert corresponding digital signal to, integrated IC ₄₆Output via integrated IC ₄₈, IC ₄₉, IC ₅₀, IC ₅₁And IC ₄₇The single chip computer device of forming draws various diagnostic results by out after running software calculates ₂₁To out ₂₃Be sent to communication unit, out ₂₄To out ₂₇Output alarm signal.

In communication unit, be like this as level, contact outputting communication element circuit structure, cross large-signal through IN by detection measurement loop short circuit, the electric current of diagnosis unit output ₁Pin exports two the tunnel, the one tunnel through photoelectrical coupler G ₁By out ₁Output level is isolated communication signal, and another road is through triode Q ₄And relay J ₁, by out ₂Pin output disconnects or the conducting contact point signal, and the measurement of diagnosis unit output in like manner loop open circuit and electric current are too small through IN ₂Pin exports two the tunnel, the one tunnel through photoelectrical coupler G ₂By out ₃Output level is isolated communication signal, and another road is through triode Q ₅, relay J ₂By out ₄The output control signal, same, the signal of the stuck state of diagnosis unit output detection signal is through IN ₃Pin is by photoelectrical coupler G ₃Out ₅Output level is isolated communication signal, in addition by triode Q ₆Succeed electrical equipment J ₃Out ₆Pin output control signal.

In communication unit, can also be like this as computing machine RS422 communication unit circuit structure, by integrated IC of detection three road signals connection trigger of diagnosis unit circuit output ₃₈Input pin IN _9～11, integrated IC ₃₈Output connects by integrated IC of single-chip microcomputer ₄₀, integrated IC of ROM ₄₁, integrated IC of RAM ₄₂And integrated IC of latch ₄₃The single card microcomputer of forming carries out software processes, by integrated IC ₄₀Output pin connects integrated IC of RS422 level circuit respectively ₄₅And IC ₄₄, by integrated IC ₄₄Out ₁₉Pin outputting communication level signal is given host computer, by integrated IC ₄₅Input end receive the communication information that host computer sends.

In converter unit, meet IN by the isolated location output signal ₆Input end, signal is via integrated 22 of amplifier, potentiometer W ₅Form the electrical level transfer circuit with resistance, integrated 22 output is via integrated IC of double operational ₂₃, resistor group move in pairs the back signal amplification and dwindle circuit, the excision switch S ₁Be articulated in resistance R ₅₈Output terminal and resistance R ₅₄Between realize that excision is to the amplification of migration signal with dwindle resistance R ₅₈Output connects by resistance R ₆₀, the limiting unit formed of voltage stabilizing diode D, by out ₉Pin export-restriction voltage and current signal.

Description of drawings is as follows:

Fig. 1 is a background technology distributor principle of work block diagram.

Fig. 2 is a distributor principle of work block diagram of the present utility model.

Fig. 3 is an AC220V power supply unit schematic diagram in the background technology.

Fig. 4 is a 24VDC power supply unit schematic diagram in the background technology.

Fig. 5 is current limliting unit and a detecting unit schematic diagram in the background technology.

Fig. 6 is an arithmetic element schematic circuit in the background technology.

Fig. 7 is a Signal Spacing unit line schematic diagram in the background technology.

Fig. 8 is converter unit and limiting unit schematic circuit.

Fig. 9 is voltage output buffer cell and V/I converting unit schematic circuit.

Figure 10 is diagnosis unit, alarm unit, state indicating member and protected location circuit theory diagrams.

Figure 11 is level, contact outputting communication element circuit schematic diagram.

Figure 12 is a computing machine RS422 communication unit schematic circuit.

Figure 13 is that distributor can generate TT﹠C system figure in the background technology.

Figure 14 is that the utility model and existing distributor can generate TT﹠C system figure.

Figure 15 is a distributor structural drawing of the present utility model.

Figure 16 is a computer diagnosis unit schematic diagram.

Be that the utility model adjoint is described in further detail below: referring to Fig. 1, this is a background technology principle of work block diagram, distributor is originally carried the power supply power supply to in-situ transducer, promptly alternating current 220V or direct current 24V is transformed into required power supply and powers to in-situ transducer after current limliting.4～20mA electric current by in-situ transducer output converts voltage signal to behind the unit after testing accurately and reliably, through arithmetic element, isolated location signal is exported two the tunnel, the one tunnel through limiting unit, V/I converting unit output current signal; Another road is through limiting unit, voltage buffer cell output voltage signal.Referring to Fig. 2, this is a circuit block diagram of the present utility model, and wherein the single frame line is same as in figure 1, and two frame lines are inventive points of the present utility model.Connection diagnostic unit and protected location between detecting unit and arithmetic element; in diagnosis unit, comprise state indicating member and alarm unit; the diagnostic result of state indication and warning is passed to communication unit; between isolated location and limiting unit, connect converter unit, realize the conversion of signal system, the shift function of level.Referring to Fig. 3, this is an AC 220V power supply circuit schematic diagram, and AC220V connects transformer B through fuse B * 1 ₁Former limit is through ac buck and be split into four groups of outputs, again through diode bridge D _1～4Rectification becomes dc pulse moving voltage and connects three terminal regulator IC through capacitor filtering ₁～IC ₅(model is 7824,7815,7915), two groups of isolation voltage+24V are arranged ,+15V ,-15V after voltage stabilizing, purpose is to improve operational reliability, anti-interference and the precision that instrument becomes the system of institute, wherein+24V is for instrument input and output usefulness, and ± 15V uses for instrument self work.Referring to Fig. 4, this is the wiring diagram of direct current 24V power supply, and direct current 24V can directly export, and another road is through three terminal regulator IC ₇(7815) exportable direct current 15V, another road is for oscillator IC ₈(time base circuit NE555) power supply, the square-wave signal control triode Q of a 20～18KHZ of oscillator IC8 output ₁～Q ₃Transformer B is given in work ₂～B ₄Former limit produces pulse current, produces coupled voltages through transformer coupled to felling, again through diode rectification, connects three terminal regulator IC behind the capacitor filtering ₉～IC ₁₂(7815,7915,7824), output stabilized voltage supply+15V ,-15V ,+24V.Referring to Fig. 5, this is limiting unit and detection cell circuit schematic diagram.Direct current+24V is through triode Q ₁₀Flow to in-situ transducer, resistance R with resistance R 68 ₆₈Pressure drop of last generation is as triode Q ₁₁When the electric current at emitter junction bias voltage flow direction scene is excessive, resistance R ₅₈On pressure drop increase triode Q ₁₁Conducting enters magnifying state, Q ₁₁Collector current through resistance R ₅₇Flow to power supply ground end, R ₅₇On pressure drop increase triode Q ₁₀The emitter junction voltage decreases flows through triode Q thereby make ₁₀The electric current of collector reduces, and reaches the purpose of current limliting, prevents that effectively super-high-current from burning out transmitter, or produces electric spark at the scene and cause unsafe factor, also prevents to measure the loop short circuit and damages distributor.Detecting unit is the resistance R by a high precision, high stability ₅₉Realize that the dc current signal that in-situ transducer is sent here converts d. c. voltage signal accurately and reliably to, by out ₁₃End output.Referring to Figure 10, by detecting unit out ₁₃Output signal IN ₈End, IN ₈End also meets double operational IC29 (AD708, NE5532, FF153, TL082), IC ₃₀(the same, OP215, LF412, LF154), IC ₃₁(model is the same), IC ₃₂(the same, ZF747 of model), IC ₃₃The input pin of (model is the same, F1437, CF1558) and IC34 (model is the same), wherein double operational IC29 negative terminal connects limit alarm settings potentiometer W6, when operate as normal, amplifier IC ₂₉Positive terminal voltage be lower than negative terminal voltage, output electronegative potential, triode Q ₁₂End relay J ₄Out ₁₄The output off-state is when the upper limit occurring when offside, IC ₂₉Positive terminal voltage be higher than negative terminal voltage, output noble potential, Q ₁₂Conducting, J ₄Adhesive, out ₁₄The output conducting state realizes the upper limit alarm process.Amplifier IC in like manner ₃₀One the input positive termination lower limit alarm settings potentiometer W ₇, during operate as normal, IC ₃₀Negative terminal voltage be higher than anode, output electronegative potential, Q ₁₃End J ₅Out ₁₅The output off-state is when lower limit occurring when offside, IC ₃₀Positive terminal voltage be higher than negative terminal, output noble potential, Q ₁₃Conducting, J ₅Adhesive, out ₁₅The output conducting state realizes the lower limit alarm procedure.Amplifier IC ₃₁Negative terminal connect and set potentiometer W ₈, IC ₃₁Main detection measurement loop short circuit and electric current are excessive, work as IN ₈Magnitude of voltage greater than a certain setting value, then IC ₃₁The output noble potential, light emitting diode D ₁₇The state indication, out ₁₆Communication unit is sent in short circuit and outrange fault status signal.In like manner, amplifier IC ₃₂Positive termination set potentiometer W ₉, during operate as normal, IC ₃₂Negative terminal voltage is higher than positive terminal voltage, output low level, and one the tunnel through R ₇₃By out ₁₇Be sent to communication unit, another road is through R ₇₄Sending and receiving optical diode D ₁₇, when measuring loop open circuit or transmitter damage, measure the loop no current and pass through 1N ₈Terminal voltage is zero, IC ₃₂Positive terminal voltage be higher than negative terminal, output high level, a route out ₁₇Fault-signal is sent to communication unit, and another road is through light emitting diode D ₁₈Luminous, indicating fault status.IN ₈Signal is through resistance R ₁₆Meet double operational IC ₃₈The integrating circuit that forms, IC ₃₃Produce one with IN ₈Lag the signal that changes through resistance R ₇₇Meet IC ₃₄Negative terminal, the IC of composition subtracter ₃₄Positive termination IN ₈End, during operate as normal, integrator IC ₃₃Output signal and IN ₈Signal is unequal, has only IN ₈When signal does not change often (stuck), these two signals could equate that the signal that equates is through IC ₂₄Output is continuously zero (normal condition can not be continuously zero) signal, connects by amplifier IC ₃₅(AD708, C F158, CF442), IC ₃₆(model the same, ICC7621), with a door IC ₃₇(74HC00,44CS00,54CS00) and potentiometer W ₁₀, W ₁₁The zero level recognizer of forming, when input signal is zero, level determiner out ₁₈The output high level is sent to communication unit, simultaneously the stuck malfunction in light emitting diode D19 luminous indication measurement loop.Referring again to Figure 16, the diagnostic circuit that this is made up of the single card microcomputer device, IN ₉Termination detecting unit output terminal out ₁₃, signal is through A/D converter IC ₄₈(ADC0804) convert corresponding digital signal to, enter by single-chip microcomputer IC ₄₇(8031,8051), ROMIC ₅₀(2732,2764), code translator IC ₅₁(74LS138), RAMIC ₄₉(6116) and/D-latch IC ₄₈(74HC373) single chip computer device of Zu Chenging through running software, draws each diagnostic result by out after the calculating ₂₁～out ₂₃Be sent to communication unit, by out ₂₄～out ₂₇Export as alerting signal.Referring to Figure 11, this is low and real work level, the contact output communication circuit theory diagrams commonly used of cost, and its way of output has two kinds, and a kind of is the current potential height, output low level during operate as normal, output noble potential when breaking down.Another kind is contact output, and just often contact disconnects, and junction closure is connected when breaking down, three road input ends, IN ₁, IN ₂, IN ₃Output terminal out with correspondence ₁, out ₂, out ₃, out ₄, out ₅, out ₆The course of work and the principle formed are identical, here with first group of IN ₁And out ₁, out ₂Between principle of work make an explanation, IN ₁Out in the disconnected unit sees and treat patients ₁₆The fault-signal of output, IN when fault is arranged ₁Being noble potential, is electronegative potential during non-fault, and by two inputs along separate routes, the one tunnel through resistance R ₉, photoelectrical coupler G ₁And resistance R ₁₅Finish level and isolate output function, another road is through resistance R ₁₀, triode G ₄, relay J ₁With diode D ₈Finish the contact output function, thereby realized the transport process of level, contact communication.Referring to Figure 12, this is computing machine RS422 communication unit wiring diagram: IN ₉, IN ₁₀And IN ₁₁The see and treat patients out of disconnected unit of input end ₁₆, out ₁₇And out ₁₃Output terminal, the diagnostic result signal is through trigger IC ₃₈(74HC175,74LS175,54LS175) buffering back connects single-chip microcomputer IC ₄₀PB ₀, BP ₁And PB ₂Interface is then via single-chip microcomputer IC ₄₀(μ PD78C10), ROM IC ₄₁(WPD272,256), RAM IC ₄₂(UPD4364), latch IC ₄₃(74LS373,74HC373) after the main single card microcomputer device in house software of forming is handled, converts communication information to through RS4 22 level circuit IC ₄₄(MC34050) out ₁₉The outputting communication level is given host computer, and the information sent of host computer is through IC in addition ₄₅(MC34050) input end enters the single card microcomputer system.Referring to Fig. 6, this is the arithmetic element circuit schematic diagram, realizes the calculation function to input signal.Out by protected location among Figure 10 ₂₀Output meets IN ₄End, signal is through resistance R 18, amplifier IC ₁₃(AD707, OP07, OP17,0P37, μ A741), resistance R ₂₃, R ₂₂, R ₂₁, potentiometer W ₁, R ₂₀, stabilivolt D ₁₂Form the signals migrate circuit, migration signal concatenation operation device IC ₁₄(AD534, AD634, BB4213, VZ B4214) ₁End, its IC ₁₄With diode D11, potentiometer W ₂Form the evolution circuit, the evolution signal is through diode D ₁₁Via amplifier IC ₁₅The in-phase amplification circuit that (AD708, μ A747, mZ1437, MC4 558, LM1558) and resistance are formed connects by amplifier IC ₁₆The adder circuit that (AD708, LF442 μ A798, RC4558, LF412) and resistance are formed is by out ₇End output computing signal is given isolated location.Referring to Fig. 7, out ₇Output voltage signal connects IN ₅End, voltage signal is via amplifier IC ₁₇(LM108, LF157, LF156, μ PC807), V/F conversion IC ₁₈(LM131, LM231, LM331) and peripheral original paper are formed accurate V/F translation circuit, connect photoelectrical coupler G ₄(PC817), the frequency signal after isolating is by G ₄Output is via the F/V conversion IC ₁₉(LM1 31), amplifier IC ₂₀(LM108) the tight F/V translation circuit of Zu Chenging, and amplifier IC ₂₁(LM108) level-conversion circuit of Zu Chenging is by out ₈The isolation voltage signal of exporting 1: 1 connects converter unit, thereby realizes the not property and the floating ground property altogether of on-site signal and pulpit signal, reaches the anti-interference of raising system and the purpose of functional reliability.Referring to Fig. 8, converter unit, IN ₆Out in the input end map interlinking 7 ₈The output terminal isolation signals is via amplifier IC ₂₂(AD708, OP14, MC4558, MC1558) and resistance R ₅₁To R ₅₄And potentiometer W ₅Form the electrical level transfer circuit, connect by amplifier IC ₂₃(AD708) and resistance R ₅₅To R ₅₈Composition excises switch S to the amplification of signal after moving and the circuit of reduction capability ₁Be articulated in resistance R ₅₈And R ₅₄Between, realization (closed back) is excised the amplification of migration signal and is dwindled, thereby makes circuit reach the conversion of realization signal amplitude and range ability, satisfies instrument, the supporting use of instrument widely.By resistance R ₅₈The signal of output is via resistance R ₆₀Series diode D ₂₂The limiting unit of forming realizes that deboost, current signal are within the numerical value of regulation, by R ₆₀And D ₂₂Node out ₉The voltage buffer cell of output signal map interlinking 9 and V/I converting unit.Referring to Fig. 9, the out of Fig. 8 ₉Meet IN ₇End, signal is through IN ₇, amplifier IC ₂₄Export amplifier IC to behind (LM224, MC4741, μ PC458, OP11) signal ₂₅(LM224), IC ₂₆(LM224) and IC ₂₇(LM308), by IC ₂₅Output terminal out ₁₁, IC ₂₆Output terminal out ₁₂, as two-way voltage buffer output terminal.And IC ₂₇Output is through triode Q ₇, amplifier IC ₂₈(LM308), triode Q ₈, Q ₉And peripheral original paper composition V/I change-over circuit, realize by the mapping function of voltage, by Q to electric current ₉The capacitor C that emitter connects ₅₂Two ends out ₁₀Export as electric current.Referring to Figure 13 and Figure 14, be connected between the existing distributor of background technology and in-situ transducer and the control system and see Figure 13, and Figure 14 is seen in connection of the present utility model, and visible the utility model has increased functions such as warning, duty demonstration, computing machine, signal be transportable.Figure 15 is the structural drawing of distributor, and watch core 1 can insert in the watchcase 2 and get final product operate as normal.

Advantage of the present utility model and effect are as follows:

1, because circuit adopts diagnosis unit and state indication unit, alarm unit and logical The news unit, historical facts or anecdotes has showed distributor and has had instrumentation indicator lamp, working station indicator And the output of self diagnosis signal, make instrument self automatic display measurement loop works state and event The barrier situation, the staff just is sitting in the control room can be rapidly, accurately aobvious by state Show that screen or supervisory control comuter know working condition and the fault state of measuring system.

2, owing to the increase converter unit, thus can make the output signal of distributor flexible and changeable, Demand according to the user is adjusted, do not need in system, to set up specially again signal conversion unit, The minimizing system consists of, and improves system reliability.

3, improved the reaction speed of system to failure condition, when having shortened the fault eliminating Between.

4, make things convenient for system debug and maintenance, reduced labour intensity.

5, realized series of products, serial profile and structure satisfy the need of different system Ask.

Claims (6)

1; the self diagnosis Multifunction distributor; comprise in-situ transducer current signal unit after testing; arithmetic element; isolated location exports two the tunnel; one the tunnel through limiting unit by V/I converting unit output current signal; another road through limiting unit by voltage buffer cell output voltage signal; it is characterized in that: connection diagnostic unit and protected location between detecting unit and arithmetic element; realize that self shows measurement loop works situation and failure condition automatically; in diagnosis unit; comprise state indicating member and alarm unit; its output connects communication unit; realization passes to the staff rapidly and accurately with diagnostic result; and the state of diagnostic result shows and the warning of deadly condition; between isolated location and limiting unit, connect converter unit, realize the signal that output is flexible and changeable.

2, self diagnosis Multifunction distributor according to claim 1 is characterized in that: in diagnosis unit and protected location, by in-situ transducer out ₁₃Pin output 4～20mA current signal connects integrated IC of amplifier ₂₉To IC ₃₄With by voltage stabilizing diode D ₂₀The protected location of forming is by out ₂₀Pin is exported to the signal of protection, wherein integrated IC of amplifier ₂₉And IC ₃₀Export the bound alerting signal respectively, respectively through triode Q ₁₂And Q ₁₃The state indication light emitting diode D that connects upper limit alarm ₁₃, relay J ₄Indicate light emitting diode D with the state that lower limit is reported to the police ₁₅, relay J ₅, by relay J ₄Out ₁₄Pin and relay J ₅Out ₁₅Pin output surmounts the alerting signal of bound deadly condition, is used to detect measurement loop short circuit and the excessive integrated IC of amplifier of electric current ₃₁Export two the tunnel, the one tunnel and meet state indication light emitting diode D ₁₇, another road output terminal out ₁₆Connect the news unit, be used to detect and measure the loop and measure integrated too small IC of electric current ₃₂Export two the tunnel, the one tunnel and meet state indication light emitting diode D ₁₈, another road output terminal out ₁₇Connect the news unit, be used for the stuck circuit of detection signal, integrated IC of integrating circuit ₃₃Output is through integrated IC of subtracter ₃₄Connection is by integrated IC ₃₅～IC ₃₇The zero level recognizer of forming, its integrated IC ₃₇Export two the tunnel, the one tunnel and connect normal condition indication light emitting diode D ₁₉, another route out ₁₈Output terminal connects communication unit.

3, self diagnosis Multifunction distributor according to claim 1, it is characterized in that: in diagnosis unit, detection signal is through IN ₉End connects integrated IC ₄₆Convert corresponding digital signal to, integrated IC ₄₈Output via integrated IC ₄₈, IC ₄₉, IC ₅₀, IC ₅₁And IC ₄₇The single chip computer device of forming draws various diagnostic results by out after running software calculates ₂₁To out ₂₃Be sent to communication unit, out ₂₄To out ₂₇Output alarm signal.

4, self diagnosis Multifunction distributor according to claim 1 is characterized in that: in communication unit, be like this as level, contact outputting communication element circuit structure, cross large-signal through IN by detection measurement loop short circuit, the electric current of diagnosis unit output ₁Pin exports two the tunnel, the one tunnel through photoelectrical coupler G ₁By out ₁Output level is isolated communication signal, and another road is through triode Q ₄And relay J ₁, by out ₂Pin output disconnects or the conducting contact point signal, and the measurement of diagnosis unit output in like manner loop open circuit and electric current are too small through IN ₂Pin exports two the tunnel, the one tunnel through photoelectrical coupler G ₂By out ₃Output level is isolated communication signal, and another road is through triode Q ₅, relay J ₂By out ₄The output control signal, same, the signal of the stuck state of diagnosis unit output detection signal is through 1N ₃Pin is by photoelectrical coupler G ₃Out ₅Output level is isolated communication signal, in addition by triode Q ₆Succeed electrical equipment J ₃Out ₃Pin output control signal.

5, self diagnosis Multifunction distributor according to claim 1 is characterized in that: in communication unit, can also be like this as computing machine RS422 communication unit circuit structure, by integrated IC of detection three road signals connection trigger of diagnosis unit circuit output ₃₈Input pin IN _9～11, integrated IC ₃₈Output connects by integrated IC of single-chip microcomputer ₄₀, integrated IC of ROM ₄₁, integrated IC of RAM ₄₂And integrated IC of latch ₄₃The single card microcomputer of forming carries out software processes, by integrated IC ₄₀Output pin connects integrated IC of RS422 level circuit respectively ₄₅And IC ₄₄, by integrated IC ₄₄Out ₁₉Pin outputting communication level signal is given host computer, by integrated IC ₄₅Input end receive the communication information that host computer sends.

6, self diagnosis Multifunction distributor according to claim 1 is characterized in that: in converter unit, meet IN by the isolated location output signal ₆Input end, signal is via integrated 22 of amplifier, potentiometer W ₅Form the electrical level transfer circuit with resistance, integrated 22 output is via integrated IC of double operational ₂₃, resistor group move in pairs the back signal amplification and dwindle circuit, the excision switch S ₁Be articulated in resistance R ₅₈Output terminal and resistance R ₅₄Between realize that excision is to the amplification of migration signal with dwindle resistance R ₅₈Output connects by resistance R ₆₀, voltage stabilizing diode D ₂₂The limiting unit of forming is by out ₉Pin export-restriction voltage and current signal.

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