CN104158522A - Personal protection interlock circuit in work area - Google Patents
Personal protection interlock circuit in work area Download PDFInfo
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- CN104158522A CN104158522A CN201410391638.2A CN201410391638A CN104158522A CN 104158522 A CN104158522 A CN 104158522A CN 201410391638 A CN201410391638 A CN 201410391638A CN 104158522 A CN104158522 A CN 104158522A
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Abstract
The invention provides a personal protection interlock circuit with sound and light alarm, and relates to a personal security circuit, which is composed of a power supply circuit, a signal input circuit, a processing circuit, an interlock control circuit and a sound and light alarm circuit, wherein the power supply circuit is composed of a power supply interface, a rectifier transformer, a rectifier integrated block, a voltage-stabilizing block and a filter capacitor; the signal input circuit is composed of an infrared emission tube, an infrared receiving tube, a signal transmission interface, an NAND gate and an isolating diode; the processing circuit is composed of a feedback resistor, an NAND gate b, an isolating resistor, and an NAND gate c; the interlock control circuit is composed of a button switch, an NAND gate c, a drive resistor, a triode a, a clamp diode, a relay and an interlock interface; and the sound and light alarm circuit is composed of a solid voice circuit, a rate resistor, a rate capacitor, a bias resistor, a triode b, a loudspeaker, and an alarm light-emitting diode. With the protection interlock circuit of the invention, when a person enters a dangerous area for work, accidental start-up of equipment can be automatically stopped, and sound and light alarm can be carried out.
Description
Technical field
The present invention relates to electronic circuit, specially refer to a kind of personal safety circuit.
Background technology
People are when having the region operation that threatens personal safety, need there is safeguard measure, when the factor that threatens personal safety is during from plant equipment, common safeguard measure is that infrared ray cuts off shutdown and manually power-off shutdown, wherein, it is to utilize human body to be isolated between infrared emission tube and receiving tube that infrared ray cuts off shutdown, make receiving tube not receive infrared signal and make equipment downtime, but operating personnel are when body departs from the linear extent between infrared emission tube and receiving tube in the course of the work, equipment can cause personnel to be clamped and casualty accident occurs by accidental activation, or receiving tube is subject to that light disturbs and misoperation makes equipment accidental activation and have an accident, this type of accident often has generation, operative employee, repeat for a long time same action, or work fatigue and do not carry out manual power-off, also often cause equipment accidental activation and have an accident.
Summary of the invention
The chain circuit of personnel protection that the object of this invention is to provide a kind of Production Regional; chain in the control circuit of main process equipment; accident prone operating area is monitored in real time; when monitoring operation area and have people; automatic prevention equipment accidental activation; and carry out acousto-optic warning, protect better operating personnel's personal safety.
The chain circuit of personnel protection of a kind of operating area of the present invention, it is characterized in that chain circuit is by power circuit, signal processing circuit, delayed processing circuit, imformation memory circuit, chain output circuit and acousto-optic warning circuit form, wherein, power circuit is by power interface a(I), power interface b(II), rectifier transformer (TC), rectification integrated package (IC1), filtering capacitor a(C1), regulator block (IC2) and filtering capacitor b(C2) form, rectifier transformer (TC) comprises primary coil and secondary coil, primary coil has line end a(1) and line end b(2) pick out, secondary coil has line end c(3) and line end d(4) pick out, signal processing circuit is by pyroelectric sensor (SD), signal transmission interface, biasing resistor a(R1), triode a(VT1), isolation resistance a(R2) and not gate a(IC3) form, signal transmission interface comprises feeding interface (III), signaling interface (IV) and interface of the ground wire (V), delayed processing circuit is by isolating diode a(V1), buffer resistance (R3), delay capacitor (C4), discharge resistance (R4), not gate c(IC5) and isolating diode c(V3) form, imformation memory circuit is by isolating diode b(V2), not gate b(IC4), isolation resistance b(R5), not gate d(IC6) and feedback resistance (R6) form, chain output circuit is by driving resistance (R7), triode b(VT2), clamp diode (V4), relay, chain interface a(VI) and chain interface b(VII) form relay pack vinculum circle (K), normally opened contact switch (Ka1) and normally-closed contact switch (Ka2), acousto-optic warning circuit is by solid-state sound circuit (IC7), speed resistance (R9), speed capacitor (C5), biasing resistor b(R8), triode c(VT3), loud speaker (BL) and luminous alarming pipe (V5) form, power interface a(I) and power interface b(II) be connected respectively to the line end a(1 of rectifier transformer (TC)) and line end b(2), the line end c(3 of rectifier transformer (TC)) and line end d(4) be connected respectively to two inputs of rectification integrated package (IC1), the positive pole of rectification integrated package (IC1) is connected to filtering capacitor a(C1) positive pole and the input of regulator block (IC2), the output of regulator block (IC2) and filtering capacitor b(C2) positive pole form working power (V+) after being connected, the negative pole of rectification integrated package (IC1) and filtering capacitor a(C1) negative pole, the earth terminal of regulator block (IC2) and filtering capacitor b(C2) negative pole form ground wire after being connected, working power (V+) is connected to the power end of pyroelectric sensor (SD) by feeding interface (III), the earth terminal of pyroelectric sensor (SD) is connected to ground wire by interface of the ground wire (V), the signal end of pyroelectric sensor (SD) is connected to biasing resistor a(R1 by signaling interface (IV)) the first pin, biasing resistor a(R1) crus secunda is connected to triode a(VT1) base stage, triode a(VT1) emitter is connected to ground wire, triode a(VT1) collector electrode is connected to isolation resistance a(R2) crus secunda and not gate a(IC3) input, isolation resistance a(R2) the first pin is connected to working power (V+), not gate a(IC3) output is connected to isolating diode a(V1) anode, the first pin of discharge resistance (R4) and isolating diode b(V2) anode, isolating diode a(V1) negative electrode is connected to the first pin of buffer resistance (R3), the crus secunda of buffer resistance (R3) is connected to the positive pole of delay capacitor (C4), crus secunda and the not gate c(IC5 of discharge resistance (R4)) input, the negative pole of delay capacitor (C4) is connected to ground wire, not gate c(IC5) output be connected to isolating diode c(V3) anode, isolating diode b(V2) negative electrode is connected to not gate b(IC4) input and the first pin of feedback resistance (R6), not gate b(IC4) output is connected to isolation resistance b(R5) the first pin, isolation resistance b(R5) crus secunda and isolating diode c(V3) negative electrode be connected to not gate d(IC6) input, not gate d(IC6) output be connected to the crus secunda of feedback resistance (R6) and drive the first pin of resistance (R7), drive the crus secunda of resistance (R7) to be connected to triode b(VT2) base stage, triode b(VT2) emitter is connected to ground wire, triode b(VT2) collector electrode is connected to the anode of clamp diode (V4) and the output of relay coil (K), and the input of the negative electrode of clamp diode (V4) and relay coil (K) is connected to working power (V+), the input of relay normally-closed contact switch (Ka2) is connected to chain interface a(VI), the output of relay normally-closed contact switch (Ka2) is connected to chain interface b(VII), the input of relay normally open contact switch (Ka1) is connected to working power (V+), the output of relay normally open contact switch (Ka1) is connected to the power end of solid-state sound circuit (IC7), the crus secunda of trigger end and speed resistance (R9), the first pin of speed resistance (R9) is connected to the speed control end of solid-state sound circuit (IC7) and the first pin of speed capacitor (C5), the earth terminal of the crus secunda of speed capacitor (C5) and solid-state sound circuit (IC7) is connected to ground wire, the output of solid-state sound circuit (IC7) is connected to triode c(VT3 by biasing resistor (R8)) base stage, triode c(VT3) collector electrode is connected to voice coil loudspeaker voice coil second end of loud speaker (BL), the voice coil loudspeaker voice coil first end of loud speaker (BL) is connected to the output of relay normally open contact switch (Ka1), triode c(VT3) emitter is connected to the anode of luminous alarming pipe (V5), the negative electrode of luminous alarming pipe (V5) is connected to ground wire.
In the present invention, at triode a(VT1) base stage and ground wire between have anti-interference condenser (C3); Not gate a(IC3), not gate b(IC4), not gate c(IC5) and not gate d(IC6) share six ungated integrated circuits, two unnecessary not gates are parallel to not gate d(IC6) on, the power end of ungated integrated circuit is connected to working power (V+), and the earth terminal of ungated integrated circuit is connected to ground wire; Luminous alarming pipe (V5) is more than one, and many luminous alarming pipes (V5) are connected in parallel; Circuit outer is with the phase line (L) of power supply, the zero line (N) of power supply, chain wire a(X1), chain wire b(X2) and control appliance, on control appliance, there is chain port, power interface a(I) and power interface b(II) be connected respectively to the phase line (L) of power supply and the zero line (N) of power supply, chain interface a(VII) and chain interface b(VIII) respectively by chain wire a(X1) and chain wire b(X2) be connected on the chain port of control appliance.
Above-mentioned invention is obtained and is easily sent out the human body information in accident operating area with pyroelectric sensor.Pyroelectric sensor claims again infrared sensor of the human body, is widely used in the infrared fields such as burglar alarm, approach switch.Conventional pyroelectric sensor mostly is passive type, the infrared radiation can only detected event human body discharging, and can not survey constant infrared radiation, when the people in operating area does not move or moves when little, the pyroelectric sensor of conventional passive type just can not be carried human body information to circuit, can cause equipment accidental activation and have an accident, therefore, need be active pyroelectric sensor the transformation of the way of the pyroelectric sensor of conventional passive type, make it to detect and do not move or move little human body information, avoid equipment accidental activation.Active pyroelectric sensor is by detecting element, amplifying circuit, Fresnel Lenses, transmission mechanism and housing form, detecting element and amplifying circuit are arranged on circuit board, Fresnel Lenses is in the place ahead of detecting element, described transmission mechanism comprises motor-driven mechanism or piezoelectric driving plate mechanism or electromagnetic drive mechanism, motion by transmission mechanism swings detecting element, just can detect and not move or move little human body information, housing is cylindrical structure, detecting element, circuit board, Fresnel Lenses and transmission mechanism are arranged in the housing of cylinder and form active human body heat-releasing electric probe.At active human body heat-releasing electric probe front end, install and cover plate again, make detecting element only detect the easy human body information of sending out in accident operating area by covering the transparent area of plate, and survey less than easily sending out accident operating area human body infrared information in addition, to avoid mistake lock, impact is produced.
Active human body heat-releasing electric probe has swung blind area because of detecting element, human body information has of short duration interruption, make information unstable, therefore, the present invention is provided with imformation memory circuit and delayed processing circuit makes human body information stable, the human body information that imformation memory circuit is sent pyroelectric sensor (SD) here is stored in the not gate b(IC4 in circuit in the mode of high level) input, when the human body information short interruption of pyroelectric sensor (SD), not gate b(IC4) input is still high level, thereby make not gate d(IC6) output have stable high level output, when finishing the work, operating personnel withdraw behind accident prone operating area, because pyroelectric sensor (SD) is surveyed less than human body information, not gate a(IC3) output is low level, delay capacitor in delayed processing circuit (C4) by discharge resistance (R4) to not gate a(IC3) output discharge, make not gate c(IC5) output be high level, by isolating diode c(V3) make not gate d(IC6) input be high level, thereby make not gate d(IC6) output and not gate b(IC4) input be reversed to low level.
During above-mentioned invention application, the normally-closed contact switch (Ka2) of relay is connected on by chain output interface and chain wire on the loop of ac contactor coil of control appliance.During work, once there be operating personnel to enter into the operating area that need protect the person, relay in circuit of the present invention is with regard to automatic pick, the normally-closed contact switch (Ka2) of relay just disconnects, the ac contactor coil of control appliance can not be switched on, thereby stop equipment accidental activation, simultaneously, normally opened contact switch (Ka1) closure of relay, make acousto-optic warning circuit work, send and " protect and chainly start, please relieved work " phonetic warning and light luminous alarming pipe (V5), " protect and chainly start, please relieved work " phonetic warning will repeatedly report, until operating personnel withdraws from operation area, relay just can discharge automatically, chain function and acousto-optic warning just can stop, equipment could start, thereby avoid having an accident.Its process is: when operating personnel enter into the operating area that need protect the person and carry out work, the signal of telecommunication of pyroelectric sensor (SD) signal end is by signaling interface (IV) and biasing resistor a(R1) be input to triode a(VT1) base stage, make triode a(VT1) collector electrode and not gate a(IC3) input be low level, not gate a(IC3) output is high level, not gate a(IC3) high level of output is by isolating diode b(V2) be input to not gate b(IC4) input, make not gate b(IC4) output be low level, while not gate a(IC3) high level of output is by isolating diode a(V1), buffer resistance (R3) and discharge resistance (R4) are input to positive pole and the not gate c(IC5 of delay capacitor (C4)) input, delay capacitor (C4) is the voltage of charging quickly to 2/3 working power (V+) very, make not gate c(IC5) input be high level, not gate c(IC5) output is low level, as not gate c(IC5) output and not gate b(IC4) output while being all low level, not gate d(IC6) output is high level, triode b(VT2) conducting, the coil of relay (K) energising, the normally-closed contact switch (Ka2) of relay disconnects, the ac contactor coil of control appliance can not be switched on, thereby stop equipment accidental activation, at not gate d(IC6) output while being high level, high level is transported to not gate b(IC4 by feedback resistance (R6)) input, make not gate b(IC4) input keep high level, at this moment, there is short interruption in the human body information if any pyroelectric sensor (SD), not gate d(IC6) output still have stable high level output, triode b(VT2) continue conducting, the coil of relay (K) continues energising, and the normally-closed contact switch (Ka2) of relay continues to disconnect.Coil (K) energising at relay, when normally-closed contact switch (Ka2) disconnects, normally opened contact switch (Ka1) closure of relay, make acousto-optic warning circuit work, prerecord " protecting and chainly starting in solid-state sound circuit (IC7), please relieved work " voice by loud speaker (BL), played back, luminous alarming pipe (V5) is also lit, pass through acousto-optic warning, verify that whether the work of chain circuit is normal on the one hand, two aspects can make operating personnel eliminate psychological pressure, relieved work, as operating personnel enters operation area, can't hear phonetic warning or can't see light-emitting caution, should exit operation area ascertains the reason at once, eliminate accident potential.During operating personnel does not withdraw operation area, protect chain and acousto-optic warning to carry out always, the voice of " protect chainly to start, please relieved work " are by repeatedly broadcasting.When finishing the work, when operating personnel withdraws from operation area, pyroelectric sensor (SD) is surveyed and is worked and rested less than human body, not gate a(IC3) output is low level, delay capacitor (C4) by discharge resistance (R4) to not gate a(IC3) output discharge, when the voltage on delay capacitor (C4) is discharged to lower than the voltage of 1/3 working power (V+), not gate c(IC5) input is low level, make not gate c(IC5) output be high level, by isolating diode c(V3) make not gate d(IC6) input be high level, thereby make not gate d(IC6) output be reversed to low level, triode b(VT2) cut-off, the coil of relay (K) power-off, it is closed that the normally-closed contact switch (Ka2) of relay recovers, for equipment normal starting ready, simultaneously, the normally opened contact switch (Ka1) of relay disconnects, acousto-optic warning circuit quits work, at not gate d(IC6) output while being reversed to low level, by the effect of feedback resistance (R6), make not gate b(IC4) input be low level, not gate b(IC4) output is high level, not gate b(IC4) high level of output is transported to not gate d(IC6 by isolation resistance (R5)) input.In the present invention, by determining that the resistance of discharge resistance (R4) and the capacitance of definite delay capacitor (C4) make delay capacitor (C4) be discharged to the low level time, it it is 3-5 second, then by determining that the time that the resistance of buffer resistance (R3) makes delay capacitor (C4) charge to high level is less than 1 second, delay capacitor (C4) charges to the time of high level and is discharged to the low level time to be determined by t=0.693RC.
In above-mentioned invention, the model of selecting of six ungated integrated circuits is the digital integrated circuit of the CMOS of CC4069, and cmos digital integrated circuit is a kind of desirable micropower circuit, strong anti-interference performance, interface circuit is simple, makes the simple circuit of composition, and reliable operation.
The invention has the beneficial effects as follows: the chain circuit of personnel protection of a kind of Production Regional providing; chain in the control circuit of main process equipment, accident prone operating area is monitored in real time, when monitoring operation area and have people; automatic prevention equipment accidental activation, and carry out acousto-optic warning.The acousto-optic warning function that the present invention has, verifies that whether the work of chain circuit is normal on the one hand, can protect better operating personnel's personal safety, and two aspects can make operating personnel eliminate psychological pressure, and relieved work, increases work efficiency.
Accompanying drawing explanation
Accompanying drawing 1 is block diagram of the present invention.
Accompanying drawing 2 is the chain circuit diagrams of the personnel protection of a kind of operating area of the present invention.
In figure: 1. line end a, 2. line end b, 3. line end c, 4. line end d, I. power interface a, II. power interface b, III. feeding interface, IV. signaling interface, V. interface of the ground wire, VI. chain interface a, VII. chain interface b, R1. biasing resistor a, R2. isolation resistance a, R3. buffer resistance, R4. discharge resistance, R5. isolation resistance b, R6. feedback resistance, R7. drive resistance, R8. biasing resistor b, R9. speed resistance, C1. filtering capacitor a, C2. filtering capacitor b, C3. anti-interference condenser, C4. delay capacitor, C5. speed capacitor, V1. isolating diode a, V2. isolating diode b, V3. isolating diode c, V4. clamp diode, V5. luminous alarming pipe, VT1. triode a, VT2. triode b, VT3. triode c, V+. working power, IC1. rectification integrated package, IC2. regulator block, IC3. not gate a, IC4. not gate b, IC5. not gate c, IC6. not gate d, IC7. solid-state sound circuit, BL. loud speaker, K. the coil of relay, Ka1. the normally opened contact switch of relay, Ka2. the normally-closed contact switch of relay, SD. pyroelectric sensor, TC. rectifier transformer, FU. fuse, L. the phase line of power supply, N. the zero line of power supply, X1. chain wire a, X2. chain wire b.
Embodiment
embodimentin execution mode shown in accompanying drawing 1 and accompanying drawing 2, a kind of chain circuit of personnel protection of operating area is by power circuit, signal processing circuit, delayed processing circuit, imformation memory circuit, chain output circuit and acousto-optic warning circuit form, wherein, power circuit is by power interface a(I), power interface b(II), rectifier transformer (TC), rectification integrated package (IC1), filtering capacitor a(C1), regulator block (IC2) and filtering capacitor b(C2) form, rectifier transformer (TC) comprises primary coil and secondary coil, primary coil has line end a(1) and line end b(2) pick out, secondary coil has line end c(3) and line end d(4) pick out, signal processing circuit is by pyroelectric sensor (SD), signal transmission interface, biasing resistor a(R1), anti-interference condenser (C3), triode a(VT1), isolation resistance a(R2) and not gate a(IC3) form, signal transmission interface comprises feeding interface (III), signaling interface (IV) and interface of the ground wire (V), delayed processing circuit is by isolating diode a(V1), buffer resistance (R3), delay capacitor (C4), discharge resistance (R4), not gate c(IC5) and isolating diode c(V3) form, imformation memory circuit is by isolating diode b(V2), not gate b(IC4), isolation resistance b(R5), not gate d(IC6) and feedback resistance (R6) form, chain output circuit is by driving resistance (R7), triode b(VT2), clamp diode (V4), relay, chain interface a(VI) and chain interface b(VII) form relay pack vinculum circle (K), normally opened contact switch (Ka1) and normally-closed contact switch (Ka2), acousto-optic warning circuit is by solid-state sound circuit (IC7), speed resistance (R9), speed capacitor (C5), biasing resistor b(R8), triode c(VT3), loud speaker (BL) and luminous alarming pipe (V5) form, power interface a(I) and power interface b(II) be connected respectively to the line end a(1 of rectifier transformer (TC)) and line end b(2), the line end c(3 of rectifier transformer (TC)) and line end d(4) be connected respectively to two inputs of rectification integrated package (IC1), the positive pole of rectification integrated package (IC1) is connected to filtering capacitor a(C1) positive pole and the input of regulator block (IC2), the output of regulator block (IC2) and filtering capacitor b(C2) positive pole form working power (V+) after being connected, the negative pole of rectification integrated package (IC1) and filtering capacitor a(C1) negative pole, the earth terminal of regulator block (IC2) and filtering capacitor b(C2) negative pole form ground wire after being connected, working power (V+) is connected to the power end of pyroelectric sensor (SD) by feeding interface (III), the earth terminal of pyroelectric sensor (SD) is connected to ground wire by interface of the ground wire (V), the signal end of pyroelectric sensor (SD) is connected to biasing resistor a(R1 by signaling interface (IV)) the first pin, biasing resistor a(R1) crus secunda is connected to triode a(VT1) base stage and the first pin of anti-interference condenser (C3), the crus secunda of anti-interference condenser (C3) and triode a(VT1) emitter be connected to ground wire, triode a(VT1) collector electrode is connected to isolation resistance a(R2) crus secunda and not gate a(IC3) input, isolation resistance a(R2) the first pin is connected to working power (V+), not gate a(IC3) output is connected to isolating diode a(V1) anode, the first pin of discharge resistance (R4) and isolating diode b(V2) anode, isolating diode a(V1) negative electrode is connected to the first pin of buffer resistance (R3), the crus secunda of buffer resistance (R3) is connected to the positive pole of delay capacitor (C4), crus secunda and the not gate c(IC5 of discharge resistance (R4)) input, the negative pole of delay capacitor (C4) is connected to ground wire, not gate c(IC5) output be connected to isolating diode c(V3) anode, isolating diode b(V2) negative electrode is connected to not gate b(IC4) input and the first pin of feedback resistance (R6), not gate b(IC4) output is connected to isolation resistance b(R5) the first pin, isolation resistance b(R5) crus secunda and isolating diode c(V3) negative electrode be connected to not gate d(IC6) input, not gate d(IC6) output be connected to the crus secunda of feedback resistance (R6) and drive the first pin of resistance (R7), drive the crus secunda of resistance (R7) to be connected to triode b(VT2) base stage, triode b(VT2) emitter is connected to ground wire, triode b(VT2) collector electrode is connected to the anode of clamp diode (V4) and the output of relay coil (K), and the input of the negative electrode of clamp diode (V4) and relay coil (K) is connected to working power (V+), the input of relay normally-closed contact switch (Ka2) is connected to chain interface a(VI), the output of relay normally-closed contact switch (Ka2) is connected to chain interface b(VII), the input of relay normally open contact switch (Ka1) is connected to working power (V+), the output of relay normally open contact switch (Ka1) is connected to the power end of solid-state sound circuit (IC7), the crus secunda of trigger end and speed resistance (R9), the first pin of speed resistance (R9) is connected to the speed control end of solid-state sound circuit (IC7) and the first pin of speed capacitor (C5), the earth terminal of the crus secunda of speed capacitor (C5) and solid-state sound circuit (IC7) is connected to ground wire, the output of solid-state sound circuit (IC7) is connected to triode c(VT3 by biasing resistor (R8)) base stage, triode c(VT3) collector electrode is connected to voice coil loudspeaker voice coil second end of loud speaker (BL), the voice coil loudspeaker voice coil first end of loud speaker (BL) is connected to the output of relay normally open contact switch (Ka1), triode c(VT3) emitter is connected to the anode of luminous alarming pipe (V5), the negative electrode of luminous alarming pipe (V5) is connected to ground wire.In the present embodiment, not gate a(IC3), not gate b(IC4), not gate c(IC5) and not gate d(IC6) share six ungated integrated circuits, two unnecessary not gates are parallel to not gate d(IC6) on, the power end of ungated integrated circuit is connected to working power (V+), the earth terminal of ungated integrated circuit is connected to ground wire, and the model of selecting of six ungated integrated circuits is the digital integrated circuit of the CMOS of CC4069; Luminous alarming pipe (V5) is more than one, and many luminous alarming pipes (V5) are connected in parallel; Circuit outer is with the phase line (L) of power supply, the zero line (N) of power supply, chain wire a(X1), chain wire b(X2) and control appliance, on control appliance, there is chain port, power interface a(I) and power interface b(II) be connected respectively to the phase line (L) of power supply and the zero line (N) of power supply, chain interface a(VII) and chain interface b(VIII) respectively by chain wire a(X1) and chain wire b(X2) be connected on the chain port of control appliance.
The above embodiments are obtained and are easily sent out the human body information in accident operating area with pyroelectric sensor.Select active pyroelectric sensor, make it to detect and do not move or move little human body information, avoid equipment accidental activation.Active pyroelectric sensor is by detecting element, amplifying circuit, Fresnel Lenses, transmission mechanism and housing form, detecting element and amplifying circuit are arranged on circuit board, Fresnel Lenses is in the place ahead of detecting element, described transmission mechanism comprises motor-driven mechanism or piezoelectric driving plate mechanism or electromagnetic drive mechanism, motion by transmission mechanism swings detecting element, just can detect and not move or move little human body information, housing is cylindrical structure, detecting element, circuit board, Fresnel Lenses and transmission mechanism are arranged in the housing of cylinder and form active human body heat-releasing electric probe.At active human body heat-releasing electric probe front end, install and cover plate again, detecting element is only surveyed and easily sent out the human body information in accident operating area, and survey less than the human body infrared information of easily sending out beyond accident operating area, to avoid that mistake is chain and impact is produced.Active human body heat-releasing electric probe has swung blind area because of detecting element, and human body information has of short duration interruption, makes information unstable, and therefore, the present embodiment is provided with imformation memory circuit and delayed processing circuit makes human body information stable.In the present embodiment when application,, the normally-closed contact switch (Ka2) of relay is connected on by chain output interface and chain wire on the loop of ac contactor coil of control appliance.During work, once there be operating personnel to enter into the operating area that need protect the person, relay in the present embodiment circuit is with regard to automatic pick, the normally-closed contact switch (Ka2) of relay just disconnects, the ac contactor coil of control appliance can not be switched on, thereby stop equipment accidental activation, simultaneously, normally opened contact switch (Ka1) closure of relay, make acousto-optic warning circuit work, send and " protect and chainly start, please relieved work " phonetic warning and light luminous alarming pipe (V5), " protect and chainly start, please relieved work " phonetic warning will repeatedly report, until operating personnel withdraws from operation area, relay just can discharge automatically, chain function and acousto-optic warning just can stop, equipment could start, thereby avoid having an accident.
Vertical parting flaskless shoot-squeeze moulding machine is adopted a kind of cast member moulding machine by numerous casting producer, when the present embodiment is applied on this moulding machine, the normally-closed contact switch (Ka2) of relay is connected on by chain wire on the loop of ac contactor coil of this moulding machine control appliance.During work, moulder enter into hydraulic pressure module driving machine and the sand mo(u)ld made between clear up and during reinforced work, the signal of telecommunication of pyroelectric sensor (SD) signal end is by signaling interface (IV) and biasing resistor a(R1) be input to triode a(VT1) base stage, make triode a(VT1) collector electrode and not gate a(IC3) input be low level, not gate a(IC3) output is high level, not gate a(IC3) high level of output is by isolating diode b(V2) be input to not gate b(IC4) input, make not gate b(IC4) output be low level, while not gate a(IC3) high level of output is by isolating diode a(V1), buffer resistance (R3) and discharge resistance (R4) are input to positive pole and the not gate c(IC5 of delay capacitor (C4)) input, delay capacitor (C4) is the voltage of charging quickly to 2/3 working power (V+) very, make not gate c(IC5) input be high level, not gate c(IC5) output is low level, as not gate c(IC5) output and not gate b(IC4) output while being all low level, not gate d(IC6) output is high level, triode b(VT2) conducting, the coil of relay (K) energising, the normally-closed contact switch (Ka2) of relay disconnects, the ac contactor coil of control appliance can not be switched on, thereby stop equipment accidental activation, at not gate d(IC6) output while being high level, high level is transported to not gate b(IC4 by feedback resistance (R6)) input, make not gate b(IC4) input keep high level, at this moment, there is short interruption in the human body information if any pyroelectric sensor (SD), not gate d(IC6) output still have stable high level output, triode b(VT2) continue conducting, the coil of relay (K) continues energising, and the normally-closed contact switch (Ka2) of relay continues to disconnect.Coil (K) energising at relay, when normally-closed contact switch (Ka2) disconnects, normally opened contact switch (Ka1) closure of relay, make acousto-optic warning circuit work, prerecord " protecting and chainly starting in solid-state sound circuit (IC7), please relieved work " voice by loud speaker (BL), played back, luminous alarming pipe (V5) is also lit, pass through acousto-optic warning, verify that whether the work of chain circuit is normal on the one hand, two aspects can make moulder eliminate psychological pressure, relieved work, as moulder enters operation area, can't hear phonetic warning or can't see light-emitting caution, should exit operation area ascertains the reason at once, eliminate accident potential.During operating personnel does not withdraw operation area, protect chain and acousto-optic warning to carry out always, the voice of " protect chainly to start, please relieved work " are by repeatedly broadcasting.When finishing the work, when operating personnel withdraws from operation area, pyroelectric sensor (SD) is surveyed and is worked and rested less than human body, not gate a(IC3) output is low level, delay capacitor (C4) by discharge resistance (R4) to not gate a(IC3) output discharge, when the voltage on delay capacitor (C4) is discharged to lower than the voltage of 1/3 working power (V+), not gate c(IC5) input is low level, make not gate c(IC5) output be high level, by isolating diode c(V3) make not gate d(IC6) input be high level, thereby make not gate d(IC6) output be reversed to low level, triode b(VT2) cut-off, the coil of relay (K) power-off, it is closed that the normally-closed contact switch (Ka2) of relay recovers, for equipment normal starting ready, simultaneously, the normally opened contact switch (Ka1) of relay disconnects, acousto-optic warning circuit quits work, at not gate d(IC6) output while being reversed to low level, by the effect of feedback resistance (R6), make not gate b(IC4) input be low level, not gate b(IC4) output is high level, not gate b(IC4) high level of output is transported to not gate d(IC6 by isolation resistance (R5)) input.In the present embodiment, by determining that the resistance of discharge resistance (R4) and the capacitance of definite delay capacitor (C4) make delay capacitor (C4) be discharged to the low level time, it it is 3-5 second, then by determining that the time that the resistance of buffer resistance (R3) makes delay capacitor (C4) charge to high level is less than 1 second, delay capacitor (C4) charges to the time of high level and is discharged to the low level time to be determined by t=0.693RC.
Claims (5)
1. the chain circuit of the personnel protection of an operating area, it is characterized in that chain circuit is by power circuit, signal processing circuit, delayed processing circuit, imformation memory circuit, chain output circuit and acousto-optic warning circuit form, wherein, power circuit is by power interface a(I), power interface b(II), rectifier transformer (TC), rectification integrated package (IC1), filtering capacitor a(C1), regulator block (IC2) and filtering capacitor b(C2) form, rectifier transformer (TC) comprises primary coil and secondary coil, primary coil has line end a(1) and line end b(2) pick out, secondary coil has line end c(3) and line end d(4) pick out, signal processing circuit is by pyroelectric sensor (SD), signal transmission interface, biasing resistor a(R1), triode a(VT1), isolation resistance a(R2) and not gate a(IC3) form, signal transmission interface comprises feeding interface (III), signaling interface (IV) and interface of the ground wire (V), delayed processing circuit is by isolating diode a(V1), buffer resistance (R3), delay capacitor (C4), discharge resistance (R4), not gate c(IC5) and isolating diode c(V3) form, imformation memory circuit is by isolating diode b(V2), not gate b(IC4), isolation resistance b(R5), not gate d(IC6) and feedback resistance (R6) form, chain output circuit is by driving resistance (R7), triode b(VT2), clamp diode (V4), relay, chain interface a(VI) and chain interface b(VII) form relay pack vinculum circle (K), normally opened contact switch (Ka1) and normally-closed contact switch (Ka2), acousto-optic warning circuit is by solid-state sound circuit (IC7), speed resistance (R9), speed capacitor (C5), biasing resistor b(R8), triode c(VT3), loud speaker (BL) and luminous alarming pipe (V5) form,
Power interface a(I) and power interface b(II) be connected respectively to the line end a(1 of rectifier transformer (TC)) and line end b(2), the line end c(3 of rectifier transformer (TC)) and line end d(4) be connected respectively to two inputs of rectification integrated package (IC1), the positive pole of rectification integrated package (IC1) is connected to filtering capacitor a(C1) positive pole and the input of regulator block (IC2), the output of regulator block (IC2) and filtering capacitor b(C2) positive pole form working power (V+) after being connected, the negative pole of rectification integrated package (IC1) and filtering capacitor a(C1) negative pole, the earth terminal of regulator block (IC2) and filtering capacitor b(C2) negative pole form ground wire after being connected,
Working power (V+) is connected to the power end of pyroelectric sensor (SD) by feeding interface (III), the earth terminal of pyroelectric sensor (SD) is connected to ground wire by interface of the ground wire (V), the signal end of pyroelectric sensor (SD) is connected to biasing resistor a(R1 by signaling interface (IV)) the first pin, biasing resistor a(R1) crus secunda is connected to triode a(VT1) base stage, triode a(VT1) emitter is connected to ground wire, triode a(VT1) collector electrode is connected to isolation resistance a(R2) crus secunda and not gate a(IC3) input, isolation resistance a(R2) the first pin is connected to working power (V+), not gate a(IC3) output is connected to isolating diode a(V1) anode, the first pin of discharge resistance (R4) and isolating diode b(V2) anode,
Isolating diode a(V1) negative electrode is connected to the first pin of buffer resistance (R3), the crus secunda of buffer resistance (R3) is connected to the positive pole of delay capacitor (C4), crus secunda and the not gate c(IC5 of discharge resistance (R4)) input, the negative pole of delay capacitor (C4) is connected to ground wire, not gate c(IC5) output be connected to isolating diode c(V3) anode;
Isolating diode b(V2) negative electrode is connected to not gate b(IC4) input and the first pin of feedback resistance (R6), not gate b(IC4) output is connected to isolation resistance b(R5) the first pin, isolation resistance b(R5) crus secunda and isolating diode c(V3) negative electrode be connected to not gate d(IC6) input, not gate d(IC6) output be connected to the crus secunda of feedback resistance (R6) and drive the first pin of resistance (R7);
Drive the crus secunda of resistance (R7) to be connected to triode b(VT2) base stage, triode b(VT2) emitter is connected to ground wire, triode b(VT2) collector electrode is connected to the anode of clamp diode (V4) and the output of relay coil (K), and the input of the negative electrode of clamp diode (V4) and relay coil (K) is connected to working power (V+); The input of relay normally-closed contact switch (Ka2) is connected to chain interface a(VI), the output of relay normally-closed contact switch (Ka2) is connected to chain interface b(VII);
The input of relay normally open contact switch (Ka1) is connected to working power (V+), the output of relay normally open contact switch (Ka1) is connected to the power end of solid-state sound circuit (IC7), the crus secunda of trigger end and speed resistance (R9), the first pin of speed resistance (R9) is connected to the speed control end of solid-state sound circuit (IC7) and the first pin of speed capacitor (C5), the earth terminal of the crus secunda of speed capacitor (C5) and solid-state sound circuit (IC7) is connected to ground wire, the output of solid-state sound circuit (IC7) is connected to triode c(VT3 by biasing resistor (R8)) base stage, triode c(VT3) collector electrode is connected to voice coil loudspeaker voice coil second end of loud speaker (BL), the voice coil loudspeaker voice coil first end of loud speaker (BL) is connected to the output of relay normally open contact switch (Ka1), triode c(VT3) emitter is connected to the anode of luminous alarming pipe (V5), the negative electrode of luminous alarming pipe (V5) is connected to ground wire.
2. the chain circuit of the personnel protection of a kind of operating area according to claim 1, is characterized in that at triode a(VT1) base stage and ground wire between have anti-interference condenser (C3).
3. the chain circuit of the personnel protection of a kind of operating area according to claim 1; it is characterized in that not gate a(IC3), not gate b(IC4), not gate c(IC5) and not gate d(IC6) share six ungated integrated circuits; two unnecessary not gates are parallel to not gate d(IC6) on; the power end of ungated integrated circuit is connected to working power (V+), and the earth terminal of ungated integrated circuit is connected to ground wire.
4. the chain circuit of the personnel protection of a kind of operating area according to claim 1, is characterized in that luminous alarming pipe (V5) is more than one, and many luminous alarming pipes (V5) are connected in parallel.
5. the chain circuit of the personnel protection of a kind of operating area according to claim 1; what it is characterized in that circuit is with the phase line (L) of power supply, the zero line (N) of power supply, chain wire a(X1 outward), chain wire b(X2) and control appliance; on control appliance, there is chain port; power interface a(I) and power interface b(II) be connected respectively to the phase line (L) of power supply and the zero line (N) of power supply, chain interface a(VII) and chain interface b(VIII) respectively by chain wire a(X1) and chain wire b(X2) be connected on the chain port of control appliance.
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| CN201410391638.2A CN104158522B (en) | 2014-08-12 | 2014-08-12 | A kind of chain circuit of the personnel protection of operating area |
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| CN201410391638.2A CN104158522B (en) | 2014-08-12 | 2014-08-12 | A kind of chain circuit of the personnel protection of operating area |
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| CN104158522B (en) | 2017-10-20 |
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