CN101800574B - Signal-sending switching device and power line carrier communication system using same - Google Patents
Signal-sending switching device and power line carrier communication system using same Download PDFInfo
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- CN101800574B CN101800574B CN 201010111861 CN201010111861A CN101800574B CN 101800574 B CN101800574 B CN 101800574B CN 201010111861 CN201010111861 CN 201010111861 CN 201010111861 A CN201010111861 A CN 201010111861A CN 101800574 B CN101800574 B CN 101800574B
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Abstract
The invention discloses a signal-sending switching device and a power line carrier communication system using same. The device comprises a SCM, a call monitor circuit, a signal-receiving state detection circuit and a line switching and pulse signal-sending circuit. The power line carrier communication system comprises a power dispatcher, a dispatching exchanger, a digital carrier for power dispatching, a digital carrier install in a high-grade converting station, analog carriers communicating with the corresponding subordinate converting stations of the high-grade converting station, analog carriers installed in the subordinate converting stations and phones which are connected with the analog carriers. The signal-sending switching device of the invention constantly monitors call state signals through the call monitor circuit, and the SCM sends line switching control signals and completes the switching of line according to the condition for receiving of the analog carriers fed back by the signal-receiving state detection circuit, thus the problem that the seizing signal and signal-sending pulse transmitted by the digital carrier can not be received at the same time owning to the slow responding speed of the analog carriers is overcome.
Description
Technical field
The present invention relates to a kind of signal-sending switching device and use its power line carrier communication system, belong to the carrier communication in the power transmission and distribution field.
Background technology
The power circuit carrier communication is the main means of communication in present power transmission and distribution field, and the power circuit carrier communication can carry out operation of power networks real-time Data Transmission and telephone voice communication simultaneously.Early stage power circuit carrier communication is man-to-man analog carrier communication, namely when needing analog carrier machine of transformer station's installation of communication, each in the transformer station of power scheduling access port the identical analog carrier machine of quantity to be installed also, digital carrier machine has appearred in recent years, it can realize a pair of three or the power circuit carrier communication of one-to-many, namely in the transformer station of power scheduling access port one number of units word carrier terminal equipment is installed, just can carry out operation of power networks real-time Data Transmission and telephone voice communication to the digital carrier machine of three or more transformer station, but the digital carrier machine cost is higher, and existing analog carrier machine can also normally use, give it up and to cause the waste of resource, add the reasons such as limited fund of electric network reconstruction, the backbone digital carrier machine that the power circuit carrier communication occurred, subordinate's transformer station still uses the situation of analog carrier machine, the communication system that this digital carrier machine and analog carrier machine mix is by power attemper platform, scheduling switch, the digital carrier machine of power scheduling access port, high-grade transformer station that install with the digital carrier machine Direct Communication power scheduling access port digital carrier machine and with each transformer station of its subordinate analog carrier machine of corresponding communication one by one, the analog carrier machine that each subordinate transformer station installs and coupled working telephone machine form, although this system also can realize using on operation of power networks real-time Data Transmission and the backbone transformer station of digital carrier machine to the telephone voice communication of power attemper platform, but power attemper platform can't use the transformer station of analog carrier machine to carry out telephone voice communication to the subordinate, its reason is: power attemper platform is the private subscribers of scheduling switch, each user of transformer station is the end user of power scheduling, scheduling is when making a phone call for each end user, do not need to dial extension, the respective keys that only need press on the dispatching desk has just sent out required number, this cries to condense and sends out number, it is one of function of scheduling switch, scheduling switch is when sending out number, be not as the people makes a phone call, to hear to send out the again number of sending out behind number sound, but Seize ACK message and number pulse are sent out simultaneously, it is no matter the equipment of back is ready to no, the this point digital carrier machine can normally receive, and the analog carrier machine is just not all right, this is because its reaction speed is slow, when it receives that Seize ACK message does not also have to collect the digits equipment access, the number pulse of digital carrier machine is all or part of sending, cause present analog carrier machine can't receive the pulse of digital carrier machine number, just can't realize that also digital carrier machine converses to the number of sending out of analog carrier machine.
Summary of the invention
The purpose of this invention is to provide a kind of power circuit carrier communication system that can make the analog carrier machine normally receive the signal-sending switching device of digital carrier machine number pulse and use this device, can't receive the normally problem of the number of sending out conversation of power circuit carrier communication system that the pulse of digital carrier machine number and digital carrier machine and analog carrier machine form with the analog carrier machine that solves subordinate transformer station.
The technical scheme of signal-sending switching device of the present invention is: a kind of signal-sending switching device, this device comprises single-chip microcomputer, the call supervision circuit, Number Receiving Status testing circuit and circuit switching and pulse signaling circuit, described call supervision circuit receives the call state signal, make call supervision circuit output state supervisory signal to an I/O mouth of single-chip microcomputer, single-chip microcomputer detects the Number Receiving Status signal of described Number Receiving Status testing circuit output by another I/O mouth, the Number Receiving Status signal of this Number Receiving Status testing circuit output is by number locking relay control of sending out in this circuit, this number locking relay is the dial line Enable Pin of connecting analog carrier terminal equipment also, single-chip microcomputer is received the Number Receiving Status signal of described Number Receiving Status testing circuit output and the dial line Enable Pin of analog carrier machine is enabled, single-chip microcomputer is finished circuit switching by the 3rd I/O mouth outlet line switch-over control signal to the circuit switching control end of circuit switching and pulse signaling circuit, single-chip microcomputer is sent out to feel the pulse by the output of the 4th I/O mouth and is flushed to sending out to feel the pulse and rushing input of described circuit switching and pulse signaling circuit, the dialing tone input that the number pulse of digital carrier machine outputs to the analog carrier machine by the circuit switching that is connected with its number pulse output end and pulse signaling circuit.
Described call supervision circuit comprises the relay of call state signal controlling, the branch road of the light-emitting diode of the normally open contact of this relay and a photoelectrical coupler and a current-limiting resistance series connection formation connects the both positive and negative polarity of power supply, the collector electrode of described photoelectrical coupler coupling triode connects an I/O mouth of pull-up resistor one end and described single-chip microcomputer, the other end of described pull-up resistor connects the positive pole of single-chip microcomputer power supply, and the emitter of this coupling triode connects the negative pole of single-chip microcomputer power supply.
Described Number Receiving Status testing circuit comprises sends out number locking relay, the branch road of the normally closed interlock of this relay and a current-limiting resistance series connection formation connects the both positive and negative polarity of power supply, wherein the serial connection of current-limiting resistance and normally closed interlock point connects the dial line Enable Pin of positive pole and the analog carrier machine of a photoelectrical coupler light-emitting diode, the negative pole of described photoelectrical coupler light-emitting diode connects the negative pole of power supply, the collector electrode of described photoelectrical coupler coupling triode connects an end of a pull-up resistor and another I/O mouth of described single-chip microcomputer, the other end of described pull-up resistor connects the positive pole of single-chip microcomputer power supply, and the emitter of this coupling triode connects the negative pole of single-chip microcomputer power supply.
Described circuit switching and pulse signaling circuit comprise circuit switching branch road and Pulse Dialing branch road, described circuit switching branch road comprises circuit switching control triode, the base stage of this triode connects the 3rd I/O mouth of current-limiting resistance and described single-chip microcomputer, its emitter connects the negative pole of single-chip microcomputer power supply, and its collector electrode is by the positive pole of the solenoid link transfer relay rated power supply power supply of circuit switching relay; Described Pulse Dialing branch road also comprises a photoelectrical coupler, the positive pole of described photoelectrical coupler light-emitting diode connects the 4th the I/O mouth that draws resistance and described single-chip microcomputer, the negative pole of this light-emitting diode connects the negative pole of single-chip microcomputer power supply, the emitter of described photoelectrical coupler coupling triode connects the number pulse output end of digital carrier machine, its collector electrode connects analog carrier machine dialing tone input, and the normally closed interlock of described circuit switching relay is attempted by the two ends of coupling transistor collector and emitter.
Described device also comprises number identification circuit and display circuit, described number identification circuit comprises four identical branch roads, every is propped up switch of route and diode series connection formation, one end of described four branch roads connects respectively corresponding four the I/O mouths of described single-chip microcomputer, and their other end connects the 5th I/O mouth of described single-chip microcomputer together; Described number display circuit comprises display and corresponding drive circuit, and the corresponding pin of described drive circuit is by the I/O mouth control of single-chip microcomputer connection corresponding to it.
The technical scheme of power line carrier communication system of the present invention is: this system comprises power attemper platform, scheduling switch, the digital carrier machine of power scheduling mouth, the digital carrier machine that high-grade transformer station installs and with each transformer station of its subordinate analog carrier machine of corresponding communication one by one, the analog carrier machine that each transformer station of subordinate installs and coupled phone, it is characterized in that: the digital carrier machine that described high-grade transformer station installs and each and its subordinate transformer station all are connected to a signal-sending switching device between the analog carrier machine of corresponding communication one by one, described signal-sending switching device comprises single-chip microcomputer, the call supervision circuit, Number Receiving Status testing circuit and circuit switching and pulse signaling circuit, described call supervision circuit receives the call state signal, make call supervision circuit output state supervisory signal to an I/O mouth of single-chip microcomputer, single-chip microcomputer detects the Number Receiving Status signal of described Number Receiving Status testing circuit output by another I/O mouth, the Number Receiving Status signal of this Number Receiving Status testing circuit output is by number locking relay control of sending out in this circuit, this number locking relay is the dial line Enable Pin of connecting analog carrier terminal equipment also, single-chip microcomputer is received the Number Receiving Status signal of described Number Receiving Status testing circuit output and the dial line Enable Pin of analog carrier machine is enabled, single-chip microcomputer is finished circuit switching by the 3rd I/O mouth outlet line switch-over control signal to the circuit switching control end of circuit switching and pulse signaling circuit, single-chip microcomputer is sent out to feel the pulse by the output of the 4th I/O mouth and is flushed to sending out to feel the pulse and rushing input of described circuit switching and pulse signaling circuit, the dialing tone input that the number pulse of digital carrier machine outputs to the analog carrier machine by the circuit switching that is connected with its number pulse output end and pulse signaling circuit.
Described call supervision circuit comprises the relay of call state signal controlling, the branch road of the light-emitting diode of the normally open contact of this relay and a photoelectrical coupler and a current-limiting resistance series connection formation connects the both positive and negative polarity of power supply, the collector electrode of described photoelectrical coupler coupling triode connects an I/O mouth of pull-up resistor one end and described single-chip microcomputer, the other end of described pull-up resistor connects the positive pole of single-chip microcomputer power supply, and the emitter of this coupling triode connects the negative pole of single-chip microcomputer power supply.
Described Number Receiving Status testing circuit comprises sends out number locking relay, the branch road of the normally closed interlock of this relay and a current-limiting resistance series connection formation connects the both positive and negative polarity of power supply, wherein the serial connection of current-limiting resistance and normally closed interlock point connects the dial line Enable Pin of positive pole and the analog carrier machine of a photoelectrical coupler light-emitting diode, the negative pole of described photoelectrical coupler light-emitting diode connects the negative pole of power supply, the collector electrode of described photoelectrical coupler coupling triode connects an end of a pull-up resistor and another I/O mouth of described single-chip microcomputer, the other end of described pull-up resistor connects the positive pole of single-chip microcomputer power supply, and the emitter of this coupling triode connects the negative pole of single-chip microcomputer power supply.
Described circuit switching and pulse signaling circuit comprise circuit switching branch road and Pulse Dialing branch road, described circuit switching branch road comprises circuit switching control triode, the base stage of this triode connects the 3rd I/O mouth of current-limiting resistance and described single-chip microcomputer, its emitter connects the negative pole of single-chip microcomputer power supply, and its collector electrode is by the positive pole of the solenoid link transfer relay rated power supply power supply of circuit switching relay; Described Pulse Dialing branch road also comprises a photoelectrical coupler, the positive pole of described photoelectrical coupler light-emitting diode connects the 4th the I/O mouth that draws resistance and described single-chip microcomputer, the negative pole of this light-emitting diode connects the negative pole of single-chip microcomputer power supply, the emitter of described photoelectrical coupler coupling triode connects the number pulse output end of digital carrier machine, its collector electrode connects analog carrier machine dialing tone input, and the normally closed interlock of described circuit switching relay is attempted by the two ends of coupling transistor collector and emitter.
This device also comprises number identification circuit and display circuit, described number identification circuit comprises four identical branch roads, every is propped up make contact of route and diode series connection formation, one end of described four branch roads connects respectively corresponding four the I/O mouths of described single-chip microcomputer, and their other end connects the 5th I/O mouth of described single-chip microcomputer together; Described number display circuit comprises display and corresponding drive circuit, and the corresponding pin of described drive circuit is by the I/O mouth control of single-chip microcomputer connection corresponding to it.
The invention has the beneficial effects as follows: signal-sending switching device of the present invention monitors the call state signal constantly by its call supervision circuit, and with the call signal notice single-chip microcomputer that monitors, single-chip microcomputer is prepared the situation of reception according to the analog carrier machine of Number Receiving Status testing circuit feedback, send the circuit switching control signal, finish the switching of circuit, finished the reception of sending out the punching of feeling the pulse by the analog carrier machine, this number device has overcome the analog carrier machine because self response speed is slow, can not receive simultaneously Seize ACK message and a problem of feeling the pulse and rushing that digital carrier machine sends, realized the purpose of Direct Communication between digital carrier machine and the analog carrier machine, power line carrier communication system of the present invention can take full advantage of the analog carrier machine of present use, has greatly reduced the communication system improvement cost.
Description of drawings
Fig. 1 is the theory diagram of power line carrier communication system of the present invention;
Fig. 2 is the schematic diagram of call supervision circuit;
Fig. 3 is the schematic diagram of Number Receiving Status testing circuit;
Fig. 4 is the schematic diagram of circuit switching and pulse signaling circuit;
Fig. 5 is the sequential chart of power line carrier communication system of the present invention;
Fig. 6 is the circuit theory diagrams of signal-sending switching device.
Embodiment
In conjunction with Fig. 1～Fig. 4 signal-sending switching device of the present invention is described, this device comprises single-chip microcomputer U1, the call supervision circuit, the Number Receiving Status testing circuit, circuit switching and pulse signaling circuit and number identification circuit and display circuit, described call supervision circuit receives the call state signal, make call supervision circuit output state supervisory signal to the P24 mouth of single-chip microcomputer U1, single-chip microcomputer U1 detects the Number Receiving Status signal of described Number Receiving Status testing circuit output by the P23 mouth, the Number Receiving Status signal of this Number Receiving Status testing circuit output is by number locking relay JM1 control of sending out in this circuit, this number locking relay JM1 is the dial line Enable Pin of connecting analog carrier terminal equipment also, single-chip microcomputer is received the Number Receiving Status signal of described Number Receiving Status testing circuit output and the dial line Enable Pin of analog carrier machine is enabled, single-chip microcomputer U1 finishes circuit switching by P26 mouth outlet line switch-over control signal to the circuit switching control end of circuit switching and pulse signaling circuit, send out to feel the pulse by P25 mouth output and be flushed to sending out to feel the pulse and rushing input of described circuit switching and pulse signaling circuit, the dialing tone input that the number pulse of digital carrier machine outputs to the analog carrier machine by the circuit switching that is connected with its number pulse output end and pulse signaling circuit, P10～P13 of described number identification circuit one termination single-chip microcomputer U1, the other end meets the P27 of single-chip microcomputer U1, the negative electrode controlled end of described number display circuit meets P10～P17 of single-chip microcomputer U1 by driver 74LS07, the anode controlled end of described number display circuit also connects 12～17 pin of single-chip microcomputer U1 by driver 74LS07, the reset pin RESET of described single-chip microcomputer U1 is connected to reset circuit, described reset circuit is made of electrochemical capacitor C1 and resistance R 2 series connection, the two ends of described electrochemical capacitor C1 also are connected to K switch 2-4 and the manual branch road of resistance R 1 series connection formation, the two ends of described resistance R 2 also are connected to diode D5 and the branch road of resistance R 3 series connection formations, the reset pin RESET of described single-chip microcomputer U1 connects the serial connection point of diode D5 and resistance R 3, be connected to crystal oscillator between the oscillator input X1 of described single-chip microcomputer U1 and the output X2, they are connected to respectively capacitor C 2 and capacitor C 3 to ground.
Described call supervision circuit comprises the relay J M2 of call state signal controlling, the branch road of the normally open contact of this relay J M2 and the light-emitting diode of a photoelectrical coupler U9 and a current-limiting resistance RM2 series connection formation connects the both positive and negative polarity of 24V power supply, the collector electrode of described photoelectrical coupler U9 coupling triode connects the P24 mouth of pull-up resistor R40 one end and described single-chip microcomputer U1, the positive pole of another termination power supply VCC of described pull-up resistor R40, the emitter of this coupling triode connects the negative pole of power supply VCC, described call supervision circuit also comprises a call state display circuit, this display circuit is made of an indicator light DS and a current-limiting resistance RM1 series connection, the negative pole of the light-emitting diode of one termination photoelectrical coupler U9 of this call state display circuit, the positive pole of its another termination 24V power supply.
Described Number Receiving Status testing circuit comprises sends out number locking relay JM1, the branch road of the normally closed interlock of this relay J M1 and a current-limiting resistance RM3 series connection formation connects the both positive and negative polarity of 24V power supply, wherein the serial connection of current-limiting resistance RM3 and normally closed interlock point connects the dial line Enable Pin of positive pole and the analog carrier machine of a photoelectrical coupler U8 light-emitting diode, the negative pole of this light-emitting diode connects the negative pole of 24V power supply, the collector electrode of described photoelectrical coupler U8 coupling triode connects the end of a pull-up resistor R39 and the P23 mouth of described single-chip microcomputer U1, the positive pole of another termination power supply VCC of described pull-up resistor R39, the emitter of this coupling triode connects the negative pole of power supply VCC.
Described circuit switching and pulse signaling circuit comprise circuit switching branch road and Pulse Dialing branch road, described circuit switching branch road comprises circuit switching control triode Q15, the base stage of this triode Q15 connects the P26 mouth of current-limiting resistance R26 and described single-chip microcomputer U1, its emitter connects the negative pole of power supply VCC, its collector electrode connects the positive pole of 12V power supply by the solenoid of circuit switching relay J, the two ends of the solenoid of described circuit switching relay J are parallel with diode D6; Described Pulse Dialing branch road also comprises a photoelectrical coupler U7, the positive pole of described photoelectrical coupler U7 light-emitting diode connects the P25 mouth that draws resistance R 4 and described single-chip microcomputer U1, the negative pole of this light-emitting diode connects the negative pole of power supply VCC, be connected to the normally closed interlock of described circuit switching relay J between the emitter and collector of described photoelectrical coupler U7 coupling triode, the two ends of this normally closed interlock connect respectively digital carrier machine and analog carrier machine.
Described number identification circuit comprises four branch roads of being connected and consisting of with four diode D7～D10 respectively by four K switch 2-1～K2-4, one end of described four branch roads connects respectively the P10 of described single-chip microcomputer U1～P13 mouth, and the other end of these four branch roads connects the P27 mouth of described single-chip microcomputer U1 together; Described number display circuit comprises four common anode number of poles code display tubes, the cathode control circuit of digital display tube and anode control circuit, the negative electrode of described each common anode number of poles code display tube all is connected with the cathode control circuit of digital display tube, the cathode control circuit of described digital display tube connects the P10 of single-chip microcomputer U1～P13 mouth by driver 74LS07, the cathode control circuit of described digital display tube comprises eight control branch roads, every the control branch road comprises a triode, its collector electrode connects the negative electrode of corresponding light-emitting diode by current-limiting resistance, its emitter connects the negative pole of power supply VCC, its base stage connects the output of a bleeder circuit, this bleeder circuit is made of two resistance series connection, described anode control circuit comprises four control branch roads, these four control branch road one ends connect respectively the anode of described four common anode number of poles code display tubes, the other end connects the I/O mouth of single-chip microcomputer U1 by driver 74LS07, described anode control circuit comprises four branch roads, every branch road comprises a triode, its collector electrode connects the anode of digital display tube, its emitter connects the positive pole of 12V power supply, its base stage connects the output of a bleeder circuit, and this bleeder circuit is made of two resistance series connection.
This signal-sending switching device also comprises power-supply circuit, described power-supply circuit comprises transformer T, the input of the output termination rectifier bridge of described transformer, the input of the output termination circuit of three-terminal voltage-stabilizing integrated LM7812 of this rectifier bridge, the input of its output termination circuit of three-terminal voltage-stabilizing integrated LM7805, the single-chip microcomputer of exporting to of circuit of three-terminal voltage-stabilizing integrated LM7805 provides power supply.
In conjunction with Fig. 5, Fig. 6 illustrates power-line carrier communication system of the present invention, this system comprises power attemper platform, scheduling switch, the digital carrier machine of power scheduling mouth, the digital carrier machine that high-grade transformer station installs and with each transformer station of its subordinate analog carrier machine of corresponding communication one by one, the analog carrier machine that each transformer station of subordinate installs and coupled working telephone machine, the digital carrier machine that described high-grade transformer station installs and each and its subordinate transformer station all are connected to a signal-sending switching device between the analog carrier machine of corresponding communication one by one, its work engineering is as follows: after the signal-sending switching device energising, Single Chip Microcomputer (SCM) system crystal oscillator starting of oscillation work, the reset enable signal single-chip microcomputer U1 that is produced greater than 30ms by reset circuit obtains sufficient resetting time, after the normal operation, through initialization, just enter the call monitoring state, when dispatching desk sends calling by digital carrier machine, the relay J M2 adhesive of the call state signal controlling in the call supervision circuit, call supervision circuit output low level is to the P24 mouth of single-chip microcomputer, at this moment single-chip microcomputer U1 obtains call signal, after obtaining call signal, confirm the Subscriber Number of this calling, number ready for sending out, for preventing that moment from having missed the actions such as machine or interference, single-chip microcomputer U1 detects the incoming level of P23 mouth, judge whether the analog carrier machine is ready to reception and sends out the punching of feeling the pulse, number blocking relay JM1 adhesive in the Number Receiving Status testing circuit, single-chip microcomputer P23 mouth input low level, the dial line Enable Pin of analog carrier machine enables, single-chip microcomputer U1 carries out the time-delay of 500-1000ms this is called out further affirmation of do, with the tasteless calling of thorough elimination, delay time complete, the P26 mouth output switching control signal of single-chip microcomputer U1, circuit switching control relay J adhesive in the control control switching circuit, disconnect the normally closed interlock between digital carrier machine number pulse output end and the analog carrier machine dialing tone input, give transistor Q16 with the control of circuit, make circuit be in number state of sending out, then, the time-delay of beginning 30ms disconnects with the normally closed interlock of confirming circuit switching control relay J, the P25 mouth of single-chip microcomputer U1 is sent and is sent out the punching of feeling the pulse, coupling control transistor Q16 through photoelectrical coupler U7 does corresponding action, the analog carrier machine receives the number pulse that sends, meanwhile single-chip microcomputer U1 drives four digital display tube, this number of sending out is carried out simultaneous display, number is sent, single-chip microcomputer U1 discharges circuit transfer relay J immediately through the P26 port, end by transistor Q16 through the P25 port, and after the 3S time-delay, close digital display tube, single-chip microcomputer U1 resets, and finishes this call treatment.
Claims (10)
1. signal-sending switching device, it is characterized in that: this device comprises single-chip microcomputer, the call supervision circuit, Number Receiving Status testing circuit and circuit switching and pulse signaling circuit, described call supervision circuit receives the call state signal, make call supervision circuit output state supervisory signal to an I/O mouth of single-chip microcomputer, single-chip microcomputer detects the Number Receiving Status signal of described Number Receiving Status testing circuit output by another I/O mouth, the Number Receiving Status signal of this Number Receiving Status testing circuit output is by number locking relay control of sending out in this circuit, this number locking relay is the dial line Enable Pin of connecting analog carrier terminal equipment also, single-chip microcomputer is received the Number Receiving Status signal of described Number Receiving Status testing circuit output and the dial line Enable Pin of analog carrier machine is enabled, single-chip microcomputer is finished circuit switching by the 3rd I/O mouth outlet line switch-over control signal to the circuit switching control end of circuit switching and pulse signaling circuit, single-chip microcomputer is sent out to feel the pulse by the output of the 4th I/O mouth and is flushed to sending out to feel the pulse and rushing input of described circuit switching and pulse signaling circuit, the dialing tone input that the number pulse of digital carrier machine outputs to the analog carrier machine by the circuit switching that is connected with its number pulse output end and pulse signaling circuit.
2. signal-sending switching device according to claim 1, it is characterized in that: described call supervision circuit comprises the relay of call state signal controlling, the branch road of the light-emitting diode of the normally open contact of this relay and a photoelectrical coupler and a current-limiting resistance series connection formation connects the both positive and negative polarity of power supply, the collector electrode of described photoelectrical coupler coupling triode connects an I/O mouth of pull-up resistor one end and described single-chip microcomputer, the other end of described pull-up resistor connects the positive pole of single-chip microcomputer power supply, and the emitter of this coupling triode connects the negative pole of single-chip microcomputer power supply.
3. signal-sending switching device according to claim 1, it is characterized in that: described Number Receiving Status testing circuit comprises sends out number locking relay, the branch road of the normally closed interlock of this relay and a current-limiting resistance series connection formation connects the both positive and negative polarity of power supply, wherein the serial connection of current-limiting resistance and normally closed interlock point connects the dial line Enable Pin of positive pole and the analog carrier machine of a photoelectrical coupler light-emitting diode, the negative pole of described photoelectrical coupler light-emitting diode connects the negative pole of power supply, the collector electrode of described photoelectrical coupler coupling triode connects an end of a pull-up resistor and another I/O mouth of described single-chip microcomputer, the other end of described pull-up resistor connects the positive pole of single-chip microcomputer power supply, and the emitter of this coupling triode connects the negative pole of single-chip microcomputer power supply.
4. signal-sending switching device according to claim 1, it is characterized in that: described circuit switching and pulse signaling circuit comprise circuit switching branch road and Pulse Dialing branch road, described circuit switching branch road comprises circuit switching control triode, the base stage of this triode connects the 3rd I/O mouth of current-limiting resistance and described single-chip microcomputer, its emitter connects the negative pole of single-chip microcomputer power supply, and its collector electrode is by the positive pole of the solenoid link transfer relay rated power supply power supply of circuit switching relay; Described Pulse Dialing branch road also comprises a photoelectrical coupler, the positive pole of described photoelectrical coupler light-emitting diode connects the 4th the I/O mouth that draws resistance and described single-chip microcomputer, the negative pole of this light-emitting diode connects the negative pole of single-chip microcomputer power supply, the emitter of described photoelectrical coupler coupling triode connects the number pulse output end of digital carrier machine, its collector electrode connects analog carrier machine dialing tone input, and the normally closed interlock of described circuit switching relay is attempted by the two ends of coupling transistor collector and emitter.
5. signal-sending switching device according to claim 1, it is characterized in that: this device also comprises number identification circuit and display circuit, described number identification circuit comprises four identical branch roads, every is propped up switch of route and diode series connection formation, one end of described four branch roads connects respectively corresponding four the I/O mouths of described single-chip microcomputer, and their other end connects the 5th I/O mouth of described single-chip microcomputer together; Described number display circuit comprises display and corresponding drive circuit, and the corresponding pin of described drive circuit is by the I/O mouth control of single-chip microcomputer connection corresponding to it.
6. power line carrier communication system, this system comprises power attemper platform, scheduling switch, the digital carrier machine of power scheduling mouth, the digital carrier machine that high-grade transformer station installs and with each transformer station of its subordinate analog carrier machine of corresponding communication one by one, the analog carrier machine that each transformer station of subordinate installs and coupled phone, it is characterized in that: the digital carrier machine that described high-grade transformer station installs and each and its subordinate transformer station all are connected to a signal-sending switching device between the analog carrier machine of corresponding communication one by one, described signal-sending switching device comprises single-chip microcomputer, the call supervision circuit, Number Receiving Status testing circuit and circuit switching and pulse signaling circuit, described call supervision circuit receives the call state signal, make call supervision circuit output state supervisory signal to an I/O mouth of single-chip microcomputer, single-chip microcomputer detects the Number Receiving Status signal of described Number Receiving Status testing circuit output by another I/O mouth, the Number Receiving Status signal of this Number Receiving Status testing circuit output is by number locking relay control of sending out in this circuit, this number locking relay is the dial line Enable Pin of connecting analog carrier terminal equipment also, single-chip microcomputer is received the Number Receiving Status signal of described Number Receiving Status testing circuit output and the dial line Enable Pin of analog carrier machine is enabled, single-chip microcomputer is finished circuit switching by the 3rd I/O mouth outlet line switch-over control signal to the circuit switching control end of circuit switching and pulse signaling circuit, single-chip microcomputer is sent out to feel the pulse by the output of the 4th I/O mouth and is flushed to sending out to feel the pulse and rushing input of described circuit switching and pulse signaling circuit, the dialing tone input that the number pulse of digital carrier machine outputs to the analog carrier machine by the circuit switching that is connected with its number pulse output end and pulse signaling circuit.
7. power line carrier communication system according to claim 6, it is characterized in that: described call supervision circuit comprises the relay of call state signal controlling, the branch road of the light-emitting diode of the normally open contact of this relay and a photoelectrical coupler and a current-limiting resistance series connection formation connects the both positive and negative polarity of power supply, the collector electrode of described photoelectrical coupler coupling triode connects an I/O mouth of pull-up resistor one end and described single-chip microcomputer, the other end of described pull-up resistor connects the positive pole of single-chip microcomputer power supply, and the emitter of this coupling triode connects the negative pole of single-chip microcomputer power supply.
8. power line carrier communication system according to claim 6, it is characterized in that: described Number Receiving Status testing circuit comprises sends out number locking relay, the branch road of the normally closed interlock of this relay and a current-limiting resistance series connection formation connects the both positive and negative polarity of power supply, wherein the serial connection of current-limiting resistance and normally closed interlock point connects the dial line Enable Pin of positive pole and the analog carrier machine of a photoelectrical coupler light-emitting diode, the negative pole of described photoelectrical coupler light-emitting diode connects the negative pole of power supply, the collector electrode of described photoelectrical coupler coupling triode connects an end of a pull-up resistor and another I/O mouth of described single-chip microcomputer, the other end of described pull-up resistor connects the positive pole of single-chip microcomputer power supply, and the emitter of this coupling triode connects the negative pole of single-chip microcomputer power supply.
9. power line carrier communication system according to claim 6, it is characterized in that: described circuit switching and pulse signaling circuit comprise circuit switching branch road and Pulse Dialing branch road, described circuit switching branch road comprises circuit switching control triode, the base stage of this triode connects the 3rd I/O mouth of current-limiting resistance and described single-chip microcomputer, its emitter connects the negative pole of single-chip microcomputer power supply, and its collector electrode is by the positive pole of the solenoid link transfer relay rated power supply power supply of circuit switching relay; Described Pulse Dialing branch road also comprises a photoelectrical coupler, the positive pole of described photoelectrical coupler light-emitting diode connects the 4th the I/O mouth that draws resistance and described single-chip microcomputer, the negative pole of this light-emitting diode connects the negative pole of single-chip microcomputer power supply, the emitter of described photoelectrical coupler coupling triode connects the number pulse output end of digital carrier machine, its collector electrode connects analog carrier machine dialing tone input, and the normally closed interlock of described circuit switching relay is attempted by the two ends of coupling transistor collector and emitter.
10. power line carrier communication system according to claim 6, it is characterized in that: this device also comprises number identification circuit and display circuit, described number identification circuit comprises four identical branch roads, every is propped up make contact of route and diode series connection formation, one end of described four branch roads connects respectively corresponding four the I/O mouths of described single-chip microcomputer, and their other end connects the 5th I/O mouth of described single-chip microcomputer together; Described number display circuit comprises display and corresponding drive circuit, and the corresponding pin of described drive circuit is by the I/O mouth control of single-chip microcomputer connection corresponding to it.
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| US9727117B2 (en) | 2015-06-25 | 2017-08-08 | International Business Machines Corporation | Validating power paths to it equipment |
| CN107196330B (en) * | 2017-05-25 | 2023-04-07 | 沈阳清能院清洁能源有限公司 | Solar dispatching optimization equipment capable of being remotely monitored |
| CN109785555B (en) * | 2019-03-15 | 2023-08-08 | 广西科技大学鹿山学院 | Ward calling system and calling method thereof |
| CN113256947B (en) * | 2021-06-22 | 2023-11-10 | 江西师范大学 | Alarm device for preventing articles from losing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2571072Y (en) * | 2001-07-18 | 2003-09-03 | 杭州东辰信息科技有限公司 | Carrier wave electric power signal monitor |
| CN1988402A (en) * | 2006-10-10 | 2007-06-27 | 东南大学 | Method for realizing power line carrier communication system |
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| AU2003237796A1 (en) * | 2002-01-24 | 2003-09-02 | Matsushita Electric Industrial Co., Ltd. | Method of and system for power line carrier communications |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2571072Y (en) * | 2001-07-18 | 2003-09-03 | 杭州东辰信息科技有限公司 | Carrier wave electric power signal monitor |
| CN1988402A (en) * | 2006-10-10 | 2007-06-27 | 东南大学 | Method for realizing power line carrier communication system |
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