CN203772945U

CN203772945U - Voltage online monitor

Info

Publication number: CN203772945U
Application number: CN201420112461.3U
Authority: CN
Inventors: 林瑞祖
Original assignee: Individual
Current assignee: Beijing Jiuzhou Hengsheng Electric Technology Co ltd
Priority date: 2014-03-13
Filing date: 2014-03-13
Publication date: 2014-08-13
Anticipated expiration: 2024-03-13

Abstract

The utility model relates to a voltage online monitor which includes a three-phase voltage signal acquisition circuit, a single-chip microcomputer control circuit, a carrier-wave signal phase lock circuit, an RS485 communication interface circuit and a linkage circuit. Output signals of the three-phase voltage signal acquisition circuit are transmitted to the single-chip microcomputer control circuit via an A/D data conversion circuit. Output signals of the single-chip microcomputer control circuit are transmitted to the carrier-wave signal phase lock circuit, the RS485 communication interface circuit and the linkage circuit respectively. The output signals of the carrier-wave signal phase lock circuit are also sent to a frequency selection amplification alarm circuit. When faults happen in the circuits, through judgment by the A/D data conversion and single-chip microcomputer control circuits, the carrier-wave signals are transmitted to a carrier-wave host to send an alarm signal and at the same time, the carrier-wave signals are transmitted to a computer host via an RS485 communication bus so that double networking selection is realized. The voltage online monitor has the advantages of being simple in integration, reliable in performance and high in intelligent degree and the like so that reliable operation of a system is ensured and linkage output conversion is carried out to another path of power supply.

Description

Voltage on-line monitoring device

Technical field

The utility model relates to a kind of watch-dog, particularly be a kind of voltage on-line monitoring device.

Background technology

Three-phase supply is supplied with task for various circuit provide power supply, quite important aspect circuit application, once break down, just will make circuit arrangement lose operation.

Utility model content

The purpose of this utility model is to provide a kind of voltage on-line monitoring device.

The utility model solves the technical scheme that its technical matters adopts: voltage on-line monitoring device, include three-phase voltage signal Acquisition Circuit, single chip machine controlling circuit, carrier signal phase lock circuitry, RS485 communication interface circuit and linkage circuit, the output signal of described three-phase voltage signal Acquisition Circuit is transferred to single chip machine controlling circuit through A/D data converting circuit, the output signal of described single chip machine controlling circuit is transferred to respectively carrier signal phase lock circuitry, RS485 communication interface circuit and linkage circuit, the output signal of described carrier signal phase lock circuitry is also sent to frequency-selecting and amplifies warning circuit.

The threephase potential transformer YB that described three-phase voltage signal Acquisition Circuit is connected by three-phase power input end gathers three-phase voltage and forms 380V loop voltage, and the output terminal of described threephase potential transformer YB is also connected with rectification, filtering circuit.

The capacitor C 10 that described carrier signal phase lock circuitry is connected by LM567 tone decoder IC5 and periphery thereof, the multivibrator that resistance R 5 forms form.

Transistor VT1 and audio-frequency transformer (AFT) T that described frequency-selecting amplification warning circuit is connected successively by LM567 tone decoder IC5 output terminal form, and the secondary L2 of described audio-frequency transformer (AFT) T sends alerting signal by capacitor C9 to carrier wave main frame.

Described RS485 communication interface circuit is connected with the com port of host computer by RS-485 remote communication module IC4.

By adopting above-mentioned technical scheme, the beneficial effects of the utility model are: in the time that circuit breaks down, the utility model is after A/D data-switching and single chip machine controlling circuit judgement, reach carrier wave main frame by carrier signal and send alerting signal, reach host computer through RS485 communication bus simultaneously, realizing dual networking selects, have integrated simple, dependable performance, intelligent degree advantages of higher, avoid because fault affects circuit arrangement operation, ensure that the reliability service of system and the output that links are converted to the supply of another road power supply.

Brief description of the drawings

Fig. 1 is frame assumption diagram of the present utility model;

Fig. 2 is circuit theory diagrams of the present utility model.

Embodiment

Further illustrate the utility model below in conjunction with the drawings and specific embodiments.

As shown in Figure 1, voltage on-line monitoring device of the present utility model, include three-phase voltage signal Acquisition Circuit, single chip machine controlling circuit, carrier signal phase lock circuitry, RS485 communication interface circuit and linkage circuit, the output signal of described three-phase voltage signal Acquisition Circuit is transferred to single chip machine controlling circuit through A/D data converting circuit, the output signal of described single chip machine controlling circuit is transferred to respectively carrier signal phase lock circuitry, RS485 communication interface circuit and linkage circuit, and the output signal of described carrier signal phase lock circuitry is also sent to frequency-selecting and amplifies warning circuit.

As shown in Figure 2, the threephase potential transformer YB that described three-phase voltage signal Acquisition Circuit is connected by three-phase power input end gathers three-phase voltage and forms 380V loop voltage, export through 100:1 ratio, through diode D1, D2, D3 rectification respectively, through capacitor C 1 filtering, adjust potentiometer W1 and can change the high or low of voltage signal output, this signal is through capacitor C 2, C3 filtering, be input to the 2nd pin of A/D data-switching chip IC 2, form data transmission circuit by the 5th, 6,7 pin and single-chip microcomputer IC1 the 35th, 36,37 pin of A/D data-switching chip IC 2.In the time that the secondary output voltage of threephase potential transformer YB is 310V, its output terminal is 3.1V, after the inner A/D data-switching of A/D data-switching chip IC 2, after single-chip microcomputer IC1 reading out data, be judged as under-voltage fault through single-chip microcomputer IC1 internal processes, single-chip microcomputer IC1Fen sends on tri-tunnels to control and drives signal, form multivibrator component carrier signal locking circuit by LM567 tone decoder IC5 and peripheral capacitor C 10, resistance R 5 etc. thereof, its oscillation frequency determines by the parameter of capacitor C 10, resistance R 5, and carrier frequency is adjusted within the scope of 150-300KHZ.Form frequency-selecting by elementary L1, capacitor C 7, the capacitor C8 of triode VT1, audio-frequency transformer (AFT) T and amplify warning circuit, by the 32nd pin output high level signal of single-chip microcomputer IC1, make LM567 tone decoder IC5 obtain working power, LM567 tone decoder IC5 starts working, secondary L2, capacitor C 9 by audio-frequency transformer (AFT) T are coupled to telephone wire, send data-signal to carrier wave main frame, and carrier wave main frame receives after alerting signal, send chimes of doom, show fault type.Another road output is sent data-signal by single-chip microcomputer IC1 to RS-485 remote communication module IC4, and after RS-485 remote communication module IC4 decoding, the com port by RS485 bus transfer to host computer, shows current fault type by computer system software.Third Road output is by the 8th pin output high level signal of single-chip microcomputer IC1, make transistor VT2 conducting, relay J adhesive, the contact J-1 of relay J transfers normally closed point to, interlock power supply transition trigger signal is provided, avoid because fault affects circuit arrangement operation, ensure that the reliability service of system and the output that links are converted to the supply of another road power supply.

Above-described is only a preferred embodiment of the present utility model, can not limit the scope that the utility model is implemented, and every equalization of doing according to the utility model claim changes and decorates, and all should still belong in the scope that the utility model contains.

Claims

1. voltage on-line monitoring device, it is characterized in that: include three-phase voltage signal Acquisition Circuit, single chip machine controlling circuit, carrier signal phase lock circuitry, RS485 communication interface circuit and linkage circuit, the output signal of described three-phase voltage signal Acquisition Circuit is transferred to single chip machine controlling circuit through A/D data converting circuit, the output signal of described single chip machine controlling circuit is transferred to respectively carrier signal phase lock circuitry, RS485 communication interface circuit and linkage circuit, and the output signal of described carrier signal phase lock circuitry is also sent to frequency-selecting and amplifies warning circuit.

2. voltage on-line monitoring device according to claim 1, it is characterized in that: the threephase potential transformer YB that described three-phase voltage signal Acquisition Circuit is connected by three-phase power input end gathers three-phase voltage and forms 380V loop voltage, and the output terminal of described threephase potential transformer YB is also connected with rectification, filtering circuit.

3. voltage on-line monitoring device according to claim 1, is characterized in that: the capacitor C 10 that described carrier signal phase lock circuitry is connected by LM567 tone decoder IC5 and periphery thereof, the multivibrator that resistance R 5 forms form.

4. voltage on-line monitoring device according to claim 3, it is characterized in that: transistor VT1 and audio-frequency transformer (AFT) T that described frequency-selecting amplification warning circuit is connected successively by LM567 tone decoder IC5 output terminal form, and the secondary L2 of described audio-frequency transformer (AFT) T sends alerting signal by capacitor C9 to carrier wave main frame.

5. voltage on-line monitoring device according to claim 1 and 2, is characterized in that: described RS485 communication interface circuit is connected with the com port of host computer by RS-485 remote communication module IC4.