CN201075734Y - Automatic power supply intelligent converter special for addressable wire television network - Google Patents

Abstract

The utility model relates to a cable network power supply technology, in particular to an automatic power supply intelligent converter for the addressable cable network, which mainly consists of a CPU control core, a converter power supply circuit, an unloading circuit and a CPU reset circuit (also called watchdog circuit); the converter is provided with two input ports (IN1 and IN2), two output ports (OUT1 and OUT2), each port adopts a general-purpose F joint for the external connection; the IN1 and OUT1 are connected with a primary power supplier A and a secondary power supplier B respectively; the CPU control core includes a CPU and a sampling circuit, an and gate circuit, and a front inverter that are sequentially arranged at the side of CPU input end and corresponding to the primary power supplier A and the secondary power supplier B, and a rear inverter, a driver and a relay that are sequentially arranged at the side of the CPU output end. The utility model can overcome the defect of the existing addressable cable network power supply technology, guarantee that the addressable cable network no longer suffer power failure.

Description

The Special Automatic supply intelligent transducer of addressable cable TV network

Technical field

The utility model relates to about the cable TV network power supply technique, is specially a kind of addressable cable TV network automatic power intelligent converter that is exclusively used in.

Background technology

Since self-built of the cable TV, network power supply is troubling numerous teletricians always.The cable TV HFC network generally adopts hub-and-spoke configuration, and the optical receiver in city or the output signal of amplifier are generally divided a few road direction different directions, extends towards periphery after relay is amplified through 1-3 level amplifier again.And optical receiver or amplifier can only one tunnel power supplies.Multichannel to optical receiver or amplifier power supply, will clash damage equipment simultaneously.And lack of standardization in the rural electricity consumption management, tripping operation happens occasionally with line fault.When particularly summer, electricity consumption put upon the full stretch, the power failure frequency was higher.Along with the raising of standard of living, air-conditioning, refrigerator generally step into family in the city, the power consumption surge, and power supply department increases many high-tension transformers for this reason, dwindles the electricity consumption scope, increases the power supply section.Adopt the burst of avoiding the peak hour to have a power failure in electric peak period, the probability that cable TV signal interrupts is also greatly increased.Along with cable TV spreads to huge numbers of families, along with entering of Digital Television, open-minded along with the cable TV network transmitted in both directions, carrying out of multi-media value-added business, how solve the problem that cable TV optical receiver or amplifier have a power failure and bring preferably with limited fund, set up the broadband networks of a stable operation, become each cable TV station's problem demanding prompt solution.The network of many stations has carried out the addressable transformation in present stage; every grade of amplifier all is furnished with a charger; and be 20 left and right sides hub power supplies at the corresponding levels; belonged to full-load run, if prime charger A has a power failure, back level charger B switches to prime charger A power supply; to be 40 hub power supplies; back level charger B will seriously overload, and all hubs will be coruscated, and enter the protection operating state.Cause A, B section all can't normally watch cable TV.

The utility model content

Goal of the invention of the present utility model just is to provide a kind of deficiency that can overcome above-mentioned addressable cable TV network power supply technique, guarantees that the power supply of addressable cable TV network no longer has a power failure, and is exclusively used in the intelligent converter of the automatic power of addressable cable network.

The technical solution of the utility model is: cable TV addressable network-specific automatic power intelligent converter, and it is mainly by CPU control core, and the converter power circuit, and unloading circuit, cpu reset circuit claim that again watchdog circuit constitutes; This transducer is provided with two input port IN1, IN2, and two output port OUT1, OUT2, each port outwards connect the general F joint of employing; Be connected with main charger A and secondary charger B respectively at IN1 and OUT1 port, the power supply of major-minor charger A, B output, one the tunnel inserts power circuit by transformer B5 and BI respectively sets up the transducer operating voltage, relay switch voltage, one the tunnel meets normally opened contact J1-1 and the J3-1 of CPU control core relay J 1 and J3 respectively, one the tunnel connects each sample circuit of CPU control core respectively, connects CPU control core more respectively; The amplifier out signal divides two-way, one the tunnel through connecting the general F joint of IN1, again through connecting a capacitor C1, through cable, again through connecting capacitor C2, connect converter output end mouth OUT1 then signal is sent into the next stage amplifier, another road is through connecting the general F joint of IN2, again through connecting a capacitor C3, through cable, through connecting capacitor C4, connect each hub that converter output end mouth OUT2 sends into signal this section then again, above-mentioned two-way is the cable TV signal passage, and it does not allow operating voltage to pass through; The power supply passage, only allow operating voltage to pass through, this operating voltage one tunnel is via the inductance L 1 that is connected the general F joint of transducer input port IN1, control the normally opened contact J3-1 of core relay J 3 again by CPU, insert output port OUT1 by the inductance L 3 that is connected converter output end mouth OUT1 again and receive secondary charger B, one the tunnel via the inductance L 1 that is connected the general F joint of transducer input port IN1, by the normally opened contact J1-1 of CPU control core relay J 1, be connected to main charger A by inductance L 5 more again; One tunnel operating voltage of the inductance L 1 one ends output that is connected by the general F joint of transducer input port IN1 is connected to a reset circuit by a sample circuit and claims watchdog circuit again, and watchdog circuit output reset pulse is connected to the RST port that resets of CPU; Unloading circuit comprises the normally opened contact J2-1 of inductance L 4 that emptier, emptier connect, relay J 2 that inductance connects, and the normally opened contact J2-1 of relay J 2 connects main charger A by inductance L 5; Described CPU control core comprises that CPU and corresponding respectively major-minor charger A, B are successively set on sample circuit, AND circuit, the preceding reverser of CPU input one side and are successively set on back reverser, driver, the relay of CPU output one side; The input of its sample circuit connects the alternating current of major-minor charger input, output termination AND circuit one input of sample circuit, another input of AND circuit switches through parallel operation power circuit output+5V voltage, the output of AND circuit connects CPU respective input mouth by preceding reverser, by reverser after the corresponding output termination, back reverser output signal promotes the corresponding actuating of relay by driver after the CPU detection identification signal.

The utility model is to belong to the addressable network tailored version.(user has signal to teleview) emptier unloads automatically when the prime master powers the power failure of A section, the automatic and network disconnection with 20 hubs in prime master charger A section, and the back secondary charger B of level oppositely powers to the amplifier of prime master charger A.Guarantee that signal does not interrupt, guarantee that the back secondary charger B section user of level can watch cable television program.Immediately by prime master charger A power supply, emptier is connected 20 hubs automatically when prime master charger A sends a telegram here, and recovers normally operation.The back secondary charger B of level stops to power to prime master charger A immediately.Its signal allocation principle is as follows: amplifier output signal divides 2 the tunnel, the one tunnel through IN1 → capacitor C 1 →-3 cables 1 → C2 → OUT1, next stage amplifier.Another road is through IN2 → C3 →-3 cables 2 → C4 → OUT2,20 hubs.

The beneficial effects of the utility model are: the utility model has overcome the deficiency of existing addressable cable TV network power supply technique, rise and to guarantee that fully the power supply of addressable cable TV network no longer has a power failure, make present stage much carry out the station network that addressable is transformed, can no longer occur causing next section can't watch the problem of cable TV, be fit to generally promote the use of owing to a section has a power failure.

Description of drawings

Fig. 1 is the theory diagram of the utility model embodiment

Embodiment

Its main feature of the utility model is as shown in drawings, has increased major-minor power supply and automatic offloading functions.The major-minor power supply is to utilize the low priority interrupt of program and high-priority interrupt to control.Automatically unloading utilizes hardware circuit to realize.When main charger A had a power failure, B5 did not work, its 21V port no-output, D8,7812A does not work, the output of 7812A no-voltage, and relay J 2 is not worked, normally opened contact J2-1 disconnects, and emptier unloads automatically, and 20 hubs and the power failure break-make of main charger A section are opened.After CPU detects main charger A and has a power failure, secondary charger B work (program setting), through sampling, relatively, with door, reverse 2, CPU, reverser 2A, driver makes relay J 3 actions, normally opened contact J3-1 closure.The power supply route is OUT1 → L3 → J3-1 → L1 → IN1 → amplifier.Thereby after guaranteeing that main charger A has a power failure, main charger A with amplifier work as usual.Guarantee that secondary charger B section user can watch cable television program.When secondary charger B worked, B1, D7,7812B be normally operation, 7812B output+12V, because unilateral conduction and the buffer action of D9, relay J 2 is not worked, and emptier is unloading still.When main charger A incoming call, main charger A work (program setting), through sampling, relatively, with door, reverser 1, CPU, reverser 1A, driver, relay J 1 is worked, make normally opened contact J1-1 closure.Its power supply route is: main charger A → L5 → J1-1 → L1 → IN1 → amplifier.Secondary charger quits work (program setting) immediately, and the J3-1 normally opened contact disconnects.B5 exports 21V to D8, and D8 output+22V to 7812A, 7812A output+12V make relay J 2 work to relay J 2, normally opened contact J2-1 closure, and emptier is connected 20 hubs automatically, recovers normally operation.

Claims (1)

1. the Special Automatic supply intelligent transducer of addressable cable TV network is characterized in that: this transducer is mainly by CPU control core, and the converter power circuit, and unloading circuit, cpu reset circuit claim that again watchdog circuit constitutes; This transducer is provided with two input port IN1, IN2, and two output port OUT1, OUT2, each port outwards connect the general F joint of employing; Be connected with main charger A and secondary charger B respectively at IN1 and OUT1 port, the power supply of major-minor charger A, B output, one the tunnel inserts power circuit by transformer B5 and BI respectively sets up the transducer operating voltage, relay switch voltage, one the tunnel meets normally opened contact J1-1 and the J3-1 of CPU control core relay J 1 and J3 respectively, one the tunnel connects each sample circuit of CPU control core respectively, connects CPU control core more respectively; The amplifier out signal divides two-way, one the tunnel through connecting the general F joint of IN1, again through connecting a capacitor C1, through cable, again through connecting capacitor C2, connect converter output end mouth OUT1 then signal is sent into the next stage amplifier, another road is through connecting the general F joint of IN2, again through connecting a capacitor C3, through cable, through connecting capacitor C4, connect each hub that converter output end mouth OUT2 sends into signal this section then again, above-mentioned two-way is the cable TV signal passage, and it does not allow operating voltage to pass through; The power supply passage, only allow operating voltage to pass through, this operating voltage one tunnel is via the inductance L 1 that is connected the general F joint of transducer input port IN1, control the normally opened contact J3-1 of core relay J 3 again by CPU, insert output port OUT1 by the inductance L 3 that is connected converter output end mouth OUT1 again and receive secondary charger B, one the tunnel via the inductance L 1 that is connected the general F joint of transducer input port IN1, by the normally opened contact J1-1 of CPU control core relay J 1, be connected to main charger A by inductance L 5 more again; One tunnel operating voltage of the inductance L 1 one ends output that is connected by the general F joint of transducer input port IN1 is connected to a reset circuit by a sample circuit and claims watchdog circuit again, and watchdog circuit output reset pulse is connected to the RST port that resets of CPU; Unloading circuit comprises the normally opened contact J2-1 of inductance L 4 that emptier, emptier connect, relay J 2 that inductance connects, and the normally opened contact J2-1 of relay J 2 connects main charger A by inductance L 5; Described CPU control core comprises that CPU and corresponding respectively major-minor charger A, B are successively set on sample circuit, AND circuit, the preceding reverser of CPU input one side and are successively set on back reverser, driver, the relay of CPU output one side; The input of its sample circuit connects the alternating current of major-minor charger input, output termination AND circuit one input of sample circuit, another input of AND circuit switches through parallel operation power circuit output+5V voltage, the output of AND circuit connects CPU respective input mouth by preceding reverser, by reverser after the corresponding output termination, back reverser output signal promotes the corresponding actuating of relay by driver after the CPU detection identification signal.

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