CN200965552Y - Universal antenna feedback line fault warning unit - Google Patents

Abstract

The utility model relates to an antenna feeder fault precaution device, which takes a SCM as the central control unit and is provided with a keyboard unit, a displaying unit, an alarm indicating unit and a power circuit in connection. The SCM data acquisition access comprises an incident voltage acquisition access of the antenna feeder, an incident voltage acquisition access of a circulator, a reflected voltage acquisition access of the antenna feeder, a reflected voltage acquisition access of the circulator, an incident voltage magnifying acquisition access of the antenna feeder, an incident voltage magnifying acquisition access of the circulator introduced respectively by signals of the output ends of cymoscopes on signals of antenna feeders, incidence of circulators and reflected voltage. Each data acquisition access is connected with the data port of the SCM through a plurality of simulating switch circuits, a limiter circuit, a peak detection circuit and a modulus A/D converter. The utility model realizes the technical aims of faults automatically judging alarm, easy discovery of fault in time, quick isolation of faults and emergency repair of faults.

Description

General antenna feeder fault pre-alarming device

Technical field

The utility model relates to the antenna feeder fault detect prior-warning device of equipment such as radar, wireless telecommunications, medical treatment.

Background technology

To be that example describes mainly below with the radar antenna feeder.It is very difficult searching and overhaul radar antenna feeder fault, because the antenna feeder oscillator has tens even thousands of, up to ten thousand usually, if its fault of untimely maintenance, reflective power will be damaged equipment such as coaxial cable, high frequency transmission line, transmitter and receiver, and loss is huge; Also there is same problem with principle wireless telecommunications and Medical Devices.Detect the antenna feeder standing-wave ratio (SWR) and be determine and show that the duty of highfrequency transmission systems and work quality, judgement antenna feeder are intact, the important detection method of poor efficiency or fault.In the present prior art; one class technology is to be provided with reflective power self check and holding circuit in radar; guaranteeing the work safety of radar highfrequency transmission systems, but because it does not possess reflective power and standing wave deixis, thereby be not easy to the technician and in time understand the antenna feeder working condition.Its second class technology contents is: install directional coupler additional at radar circulator the 3rd port, detect the leakage power of antenna feeder and circulator in the task start, according to the emissive power indication, can use

Accurately calculate standing-wave ratio (SWR); The technical problem underlying that this technology exists is: its detection needs time a few minutes, and when detecting leakage power, need to use special power meter and attenuator, these instruments are because of costing an arm and a leg, grass-roots unit is difficult to popularize, the problem that still exists fault in time not overhaul.For this reason, radar has been allotted sweep generator, the electric bridge of forming by means of one 50 Ω measuring resistance detects antenna, circulator standing-wave ratio (SWR), show that through a large amount of practices this measuring method error is bigger, can incur loss through delay troubleshooting time equally, technician have to often use instrument such as avometer, megger to detect antenna feeder, and the use of these instruments needs a large amount of dismounting antenna feeders, is subjected to the serious restriction of task and weather on the one hand, and the intrinsic reliability of antenna feeder is reduced.In sum, prior art ubiquity performance poor, need more auxiliary detection instrument, detection means complexity, technical matters that automaticity is low.

Summary of the invention

Goal of the invention of the present utility model is to provide a kind of automaticity height that can detect antenna feeder and circulator duty automatically, the radar job failure is reported to the police automatically, detects accurately and rapidly general antenna feeder fault pre-alarming device.The general antenna feeder fault pre-alarming device technical scheme that the utility model provides, its major technique content is: a kind of general antenna feeder fault pre-alarming device, with the single-chip microcomputer is central control unit, be connected with keyboard unit, display unit, warning indicating member and power circuit, the data acquisition channel of single-chip microcomputer comprises respectively by antenna feeder, circulator incident, the antenna feeder incident voltage acquisition channel that reflected voltage signal wave detector output end signal is introduced, circulator incident voltage acquisition channel, antenna feeder reflected voltage acquisition channel, circulator reflected voltage acquisition channel, the antenna feeder reflected voltage amplifies acquisition channel, the circulator reflected voltage amplifies acquisition channel, and each data acquisition channel is through multi-channel analog switch circuit and amplitude limiter circuit, peak-detector circuit and analog to digital converter are connected to the single-chip data port.

The disclosed general antenna feeder fault pre-alarming device technical scheme of the utility model, the antenna feeder incident voltage can be finished, reflection electric circuit and circulator incident voltage, on the basis that reflected voltage detects, automatically realize the computing of standing-wave ratio (SWR), and with its important indicator as judgement antenna feeder and circulator serviceability quality, the realization fault judgement is reported to the police, so that find timely, fast isolated fault and being rushed to repair has reached automatic high-speed, quick judgement, the maintenance radar, wireless telecommunications, the Medical Devices antenna feeder, the contour technical purpose that keeps pouring in the communication system fault of circulator.

Description of drawings

Accompanying drawing is the circuit composition frame chart of this general antenna feeder fault pre-alarming device.

Embodiment

General antenna feeder fault pre-alarming device of the present utility model shown in its structured flowchart, is to be central control unit with the singlechip CPU chip, is provided with each peripheral function unit, and they comprise keyboard unit, display unit, warning indicating member and power circuit.The data acquisition channel that the single-chip microcomputer central control unit is connected with, comprise respectively by antenna feeder, the circulator incident voltage, the antenna feeder incident voltage acquisition channel that the sound detector output terminal of reflected voltage is introduced, circulator incident voltage acquisition channel, antenna feeder reflected voltage acquisition channel, circulator reflected voltage acquisition channel, because reflected voltage signal is fainter usually, so the amplification channel of two reflected voltages need be set, be the amplification acquisition channel of antenna feeder reflected voltage through amplifier, the circulator reflected voltage dwindles corresponding multiple with digital value by central control unit and can carry out direct computing through the amplification acquisition channel of amplifier in program design; By the threeway head with four road pulse envelope output signals of the incident of antenna feeder, circulator, reflected signal wave detector respectively as the input acquired signal of above-mentioned each data acquisition channel, thereby guarantee the power indication and the standing-wave protecting circuit operate as normal of former machine.In its data acquisition channel design, be provided with multiselect one multi-channel analog switch circuit of the selection instruction port that is controlled by central control unit, input to the data-in port of singlechip chip through amplitude limiter circuit, peak-detector circuit and modulus a/d transducer, carry out data processing and analysis, computing by singlechip chip, according to actual detected calculation of parameter standing-wave ratio (SWR), compare according to the antenna feeder standing-wave ratio (SWR), the wave detector standing-wave ratio (SWR) predetermined value that are provided with in advance respectively again, when surpassing predetermined value, report to the police through the warning indicating member.In this enforcement structure, what its modulus a/d transducer adopted is integral a/d converter, and its setting can obtain slewing rate faster, and the resolution of its conversion can be provided with again flexibly, and to satisfy the accuracy requirement of this precaution device, cost performance is higher.Definition is provided with A, B, four main buttons of C/D, E/F in its keyboard unit, its A key definition selects to be provided with button for the antenna feeder standing-wave ratio (SWR), its B key definition is selected button is set for the circulator standing-wave ratio (SWR), and C/D, E/F are respectively standing-wave ratio (SWR) lower limit predetermined value, upper limit predetermined value.

Claims (3)

1, a kind of general antenna feeder fault pre-alarming device, it is characterized in that, with the single-chip microcomputer is central control unit, be connected with keyboard unit, display unit, warning indicating member and power circuit, the data acquisition channel of single-chip microcomputer comprises respectively by antenna feeder, circulator incident, the antenna feeder incident voltage acquisition channel that reflected voltage signal wave detector output end signal is introduced, circulator incident voltage acquisition channel, antenna feeder reflected voltage acquisition channel, circulator reflected voltage acquisition channel, the antenna feeder reflected voltage amplifies acquisition channel, the circulator reflected voltage amplifies acquisition channel, and each data acquisition channel is through multi-channel analog switch circuit and amplitude limiter circuit, peak-detector circuit and analog to digital converter are connected to the single-chip data port.

2, general antenna feeder fault pre-alarming device according to claim 1, it is characterized in that its keyboard unit definition is provided with the antenna feeder standing-wave ratio (SWR) and selects to be provided with button A, the circulator standing-wave ratio (SWR) is selected button B is set, and standing-wave ratio (SWR) lower limit predetermined value, upper limit predetermined value are provided with key C/D, E/F.

3, general antenna feeder fault pre-alarming device according to claim 1 is characterized in that the incident of antenna feeder, circulator, four road pulse envelope output signals of reflected signal wave detector are connected to the collection input end of each data acquisition channel by the threeway head.

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