CN1025271C - Microprocessor controlled ground system monitor - Google Patents

Abstract

The present invention relates to a system for monitoring a grounded system, which can be arranged in a telephone exchange station. The system scans a large quantity of grounded conductors in a main grounded electrode by a hall effect sensor so as to monitor alternating currents and direct currents on the conductors. If a surge enters a telephone exchange station, the surge is coupled to the ground. A microprocessor is guaranteed to continuously take out current values on each grounded conductor. The microprocessor compares the current values with preset parameters. If the current values exceed threshold values of the preset parameters, an alarm report in which alternating currents and direct currents of each grounded conductor are listed is generated so as to obtain the permission to look up and modify any generated problem.

Description

Microprocessor controlled ground system monitor

The present invention relates to be used for for example grounding system (ground system) monitor of telephone exchange station (telephone switching offices).More particularly, the present invention relates to monitor the AC/DC electric current on a large amount of earthing conductors and produce and list for example AC on all monitored conductors of identification place and the microprocessor-controlIed ground system monitor of DC current surge (pulsation) level alarm report.

Microprocessor-controlIed ground system monitor of the present invention is preferably used in the grounding system in the monitoring telephone exchange station.In the past, the telephone exchange station used dynamo-electric switching device shifter to be coupled communication line to reach the telephonic communication between two places.In such switching system, what be switched on or switched off is out and out contact.

Computerized switching is changed at modern telephone exchange station slave TURP exchange device.In computerized switching, do not use dynamo-electric action component but remove to trigger electronic switch by control signal.

One of advantage of using the telephone exchange station of electric mechanical switch and vacuum tube amplifier is that these elements are compared the infringement that for example far is not vulnerable to the surge current that caused by electric storm with the computerized parts in their modern times.Modern integrated circuit (IC) apparatus is compared the increase or the surge current that can not stand voltage with original electromechanical component.

Thereby; comprise that for the modern telephone board grounding system of a fail safe is a particular importance; this system can protect the equipment that cost is very high in the telephone exchange station and strengthen reliability, even make telephone exchange station endure after suffering high voltage and current pulsation.A kind of like this grounding system has been arranged, if surge current passes to the telephone exchange station, single-point grounding system just is coupled to main earthing strip (master ground bar) in the telephone exchange station to the electric current on the earthing conductor.Like this, if for example cause surge current by thunder and lightning or with neglectful contact of high-voltage line on shielded wire harness, this high voltage will be coupled to the earth.By this way, personnel in the telephone exchange station and setting all are protected.

In making exchange high cost equipment for example digital exchange system avoid the infringement, the interruption of telephone service also can be prevented because of such grounding system.Because it is main revenue source for telephone operator that telephonic communication is provided, thereby interruption cost concerning these companies of service is extreme expensive.

Computer-controlled switching device in the telephone exchange station comprises separately independently ground connection.Though the different piece of phone switching device is connected electrically on the computer, each environment division all comprises ground connection separately.All distinguish separately under the situation of ground connection at all devices, if there is voltage to raise, then this voltage raises will not had potential difference between each environment division like this by reflection with being equal to.In this case, if telephone exchange station staff contacts two environment divisions,, just can not injure the staff if these two environment divisions all connect the earth.

Unfortunately, because many telephone exchange station all increases a lot of equipment strengthening its ability to communicate, and these new equipments do not have independently when mounted or suitable ground connection.These do not meet the installation of the equipment of safety requirements, have caused a series of problems in the many telephone exchange station that spreads all over the country.

In the past, monitored the grounding system Ambulatory monitoring unit that is used for trouble-shooting and failure diagnosis in telephone exchange station.But this prior art monitoring system only can provide the diagnostic message of limited quantity.

For example, in prior art, if high voltage or surge current enter a telephone exchange station, the resulting information of switching station only is to have a surge current to make some equipment suffer infringement.But this switching station is not apprised of for example source of surge current, and promptly surge current from which earthing conductor enters.

According to the present invention, telephone exchange company can discern surge current and which Ampereconductors to enter the telephone exchange station from.Yet this exchange can determine that for example, though surge current should be coupled to ground, some surge current has been coupled on the framework of a certain equipment of exchange.Such data have been arranged, and telephone exchange company just can find out in the grounding system defective design and do and improve to prevent that such infringement from taking place once more accordingly.Like this, the telephone exchange station just can notice at once, for example, during an outside contractor appliance arrangement, violated generally acknowledged ground connection operation rules.This makes can in time correct the repairing that prevents arm and a leg smart devices and the personnel that prevent sustain damage.

According to the present invention, the transducer that interrelates with each earthing conductor is scanned periodically, makes that the electric current on each earthing conductor comes under observation continuously.The present invention utilizes a real-time clock generation time and date and time information to monitor and to report the data of earthing conductor with respect to the time.

The present invention can be worked with single-point grounding system one that use, that all earthing conductors are coupled to a main earthing strip in the telephone exchange station.This main earthing strip is single benchmark (reference) point to the positive voltage and the earth of switching station.AC and the DC electric current of the present invention's monitoring on each earthing conductor of main earthing strip place.

According to the present invention, microprocessor-controlIed ground system monitor promptly almost produces alarm report continuously once being provided with.From these initial reports, the electric current on all conductors is promptly determined.Can determine that from this data to what current value of a certain switching station be normal.These values are used to then to select that the user's preset the warning trigger parameter.Like this, parameter value can determine to make alarm report not produce continuously by rule of thumb.Certainly, these parameters should be configured to produce report when action must be taked when correcting.

The present invention allows to read low current value and a large amount of earthing conductors of continuous monitoring from earthing conductor.The electric current of conductor of flowing through produces an electromagnetic field, and it causes electric current in the Hall effect converter.The electric current of each Hall effect converter of flowing through is detected and produces the voltage (proportional with the hall effect sensor electric current) of an indicator current by hall effect sensor.These signals are exaggerated and are coupled to microprocessor, and it is the voltage level conversion that detects the current level of indicating the corresponding earthing conductor electric current of flowing through.

Microprocessor-controlIed grounding system of the present invention for example for good and all is arranged in the telephone exchange station.The present invention uses the hall effect sensor be exaggerated to scan a large amount of earthing conductors at main earthing strip place and monitors AC and DC electric current on the conductor.If a surge enters the telephone exchange station, it just is coupled to ground.

The present invention monitors these earthing conductors to guarantee the operate as normal of grounding system.Microprocessor guarantees to read continuously the electric current on each earthing conductor.Microprocessor compares current indication and the parameter that presets.If reading surpasses the predetermined parameters threshold value, just produce an alarm report.

Report is not only listed as the electric current on the conductor in surge source, and shows the increase of any electric current on other monitored earthing conductor.Like this, if surge enters on an earthing conductor, flow on another earthing conductor, and enter station equipment thus, system of the present invention will indicate these situations and produce alarm report so that survey and proofread and correct the problem of any generation.

Such report has been arranged, and the non-isolation earthing conductor (non-isolated ground conductor) that is coupled to main earthing strip and a certain device framework just can carefully be monitored.Electric current on the conductor although it is so may be minimum, still, increases 10 or 100 times if this conductor for example shows electric current, the present invention just can provide the time and date data, electric current increase on the earthing conductor is connected with other incidents, and for example equipment is equipped with problem, electric storm etc.

In some cases, the excessive electric current on earthing conductor can cause severe impairment to the computer switching device, if it and a high surge voltage will be like this when being coupled.By means of the present invention, such harm just can be avoided.

The present invention considers that the low relatively level surge of continuity a period of time may trigger enough error messages and cause the interruption of telephone service on the computer of telephone exchange company.The error message that this low relatively voltage surge produces may surpass the memory capacity that allows, and temporarily blocks the computer at telephone exchange station thus.The application of the invention is monitored, and this lower voltage surge can be coupled to the earth and not cause the error message at telephone exchange station.The present invention monitors this low relatively voltage surge that enters the telephone exchange station, makes telephone operator can find the potential problem that interrelates therewith.

The present invention can produce report on the teletype writer of this machine, on demonstration or the printing terminal.In addition, the present invention can use the telephone number to dial central station (centralsite) automatically to transmit the alarm condition report to the there with modulator-demodulator.Modulator-demodulator also can be used for receiving the phone from central station, so that once requiring with regard to triggering for generating grounding system status report.Also can carry out other according to the present invention and change, for example change the parameter of monitoring or regulate real-time clock (for example, changing the summer time into) etc.

Of the present invention these and other purpose and advantage by reading being described in detail of the most preferred embodiment done below in conjunction with accompanying drawing, will be better understood.

Fig. 1 is the hardware block diagram according to the microprocessor-controlIed grounding system of exemplary embodiments of the present invention.

Fig. 2 is the earthing conductor transducer figure that describes telephone exchange station owner earthing strip and interrelate.

Fig. 3 is the schematic diagram of the analog signal adjuster hardware of a path of expression.

Fig. 4 and Fig. 5 are the flow charts that is shown in the performed job order of the microprocessor of Fig. 1.

Fig. 6 is that a typical case who is used to allow the operator to revise parameter shows.

Fig. 7 A and Fig. 7 B are typical alarm reports.

Fig. 1 is the hardware block diagram according to the micro-processor controlled ground system monitor of one embodiment of the present of invention.Power supply 2 is given all component power supply in the system, shown in " power supply input " among Fig. 1.For example, real-time clock 22 is given in power supply 2 power supply, microcomputer 14 and the transducer of getting in touch with the Hall effect converter that is seated in from the conductor of main earthing strip.Power supply 2 also provides digital assembly required voltage, for example ± 5 volt.Equally, provide ± 5 volts of voltages to hall effect sensor.

The anode of power supply 2 is with reference to (benchmark) point with the earth as shown in Figure 1, all is so usually in the many exchanges system.Power supply provides one-25 volts virtual earth, by virtual earth will ± 12 volts supplies except that line drive that links to each other with teletype writer with modulator-demodulator and all component the line receiver.Modulator-demodulator and teletype writer ± 12 volt power supply is benchmark with the earth.One signal level converter (translator) is set up the communication connection between digital hardware and connection driver and receiver.Power supply 2 comprises battery backup (not shown) in addition so that provide stand-by power supply to (in real time) clock and RAM26, makes when power-fail not obliterated data.

The microprocessor-controlIed ground system monitor that is shown in Fig. 1 receives its input data from sensor groups 4.Point out that as top each earthing conductor at main earthing strip place interrelates in Hall effect converter and the single-point grounding system, just as in the protective earthing system of central telephone station typical case's use.

Shown in Figure 2 is that the part of central station protective earthing system, this grounding system for example can be to imitate the sort of of district electrified management board (Rural Electrification Administration) TE C handbook part 810, the 6 interim explanations.Hall effect sensor S1, S2, S3 ... SN is added in the central station protective earthing system.

As shown in Figure 2, hall effect sensor interrelates with each system grounding conductor that is connected contact R, C, M, G, N, B, L, W, N1, N2, I1 and I2 on the main earthing strip 30.

As shown in Figure 2, hall effect sensor S1 to SN be arranged on main earthing strip each earthing conductor around.Each earthing conductor that is connected to main earthing strip then is connected on the miscellaneous equipment at the station of being protected by grounding system.For example, the conductor 32 that is connected to earthing strip contact R is linked wireless device chamber 34.Earthing conductor 36 can for example be linked cable input end grounding bar 38, thus, cable input end grounding bar 38 is linked to each other with main earthing strip C point.Cable input end grounding bar 38 is linked cable shield earth terminal or earth strip then, as shown in Figure 2.Though illustrate in Fig. 2, easy to understand is linked main earthing strip at the computerization switched system of central station and other digital device of central station through the earthing conductor that is connected with isolation ground connection window shape band (window bar).

Hall effect converter and amplifying circuit A1 ... the hall effect sensor S1 of AN and each ring-type ... SN interrelates and produces sensor output signal.The circuit A1-AN that interrelates with each hall effect sensor comprises power supply and amplifying circuit.In order to ensure the stability of transducer, transducer by accurately ± 5 volts of power supplies.The amplifying circuit that interrelates with each transducer S1 to SN is used to amplify the signal from each transducer that interrelates.Because very little from the tested current value of each transducer S1 to SN, thereby such amplifying circuit is necessary.

Each circuit A1 to AN receives power supply 2 supplies ± 12 volts of voltages.Each circuit A1 ... AN receive ± 12 volts be converted to ± 5 volts.Rely on these DC level, in the transducer S1 to SN that interrelates, produce electric current.The amplifier section of A1 is also by ± 5 volts of power supplies.By from ± 12 volts to ± 5 volts voltage transitions process, the voltage of supplying with Hall element in amplifying circuit is calibrated to guarantee the burning voltage of each transducer.By this way, even power source voltage changes, the voltage of calibrating in A1 to AN guarantees to supply with each amplifier A1 to AN with ± 5 volts.

Amplifier A1 to AN is highly accurate, stable amplifier, their amplifications send the analog signal adjuster (analog signal conditioner) 6 that is shown in Fig. 1 to from the signal of the hall effect sensor of getting in touch with it and these signals, and the latter will be described in detail below.By amplifying the very little voltage signal that is produced by each Hall effect converter, the precision of native system improves greatly.Hall effect sensor S1 to SN measures up to for example 100 amperes AC and DC electric current.

What link with each transducer S1 to SN that is shown in Fig. 2 and amplifier A1 to AN is the analog signal adjuster that is shown in Fig. 1.Like this, if 16 transducer S1 to S16 are arranged, a signal conditioner will be arranged in these 16 transducers each.Analog signal adjuster 6 is divided into 4 components to the output signal from each circuit A1 to AN, that is, and and the AC level of each transducer, DC level, the surging signal of positive and negative.The AC level signal is determined by the P-to-P voltage measured value of sensor output signal.

Shown in the example of Fig. 3, analog signal adjuster 6 comprises testing circuit 50,52.For example, the output of the amplifier A1 that is coupled with the transducer S1 that is shown in Fig. 2 is input to circuit shown in Figure 3 at the node 48 of Fig. 3.The peak detection circuit 50,52 that comprises the surge passage comprises amplifier 54,56, and they link diode 58,60 respectively, and 58,60 of diodes are linked electric capacity 62 and 64, capacity earth respectively.Diode 58 and 60 is coupled to the inverting input of amplifier 54,56 in addition respectively.

During work, suppose an input 48 that is coupled to Fig. 3 than higher voltage.If the peak is a posivtive spike, then diode 58 is forward bias, and electric capacity 62 is recharged.Because this voltage peak, diode 60 will be blocked electric current, thereby electric capacity 64 can not be by such posivtive spike charging.Like this, because diode 58 and 60 polarity are opposite, if a negative surge is arranged, electric capacity 64 will be recharged and diode 58 will be blocked the charging current to electric capacity 62.As below will being narrated, the output peak signal of this positive and negative by microcomputer 14 and preset parameter relatively, if surpass this parameter then produce an alarm report.For each transducer S1-SN all have one have as shown in Figure 3 two electric capacity and the peak detector of two diodes, thus, produce the peak value surge output of positive and negatives respectively at output 66 and 68.Like this, positive surge passage 50 is followed the tracks of positive signal and is kept maximum positive signal, and negative surge passage 52 is followed the tracks of negative signal and kept maximum negative signal.

In output 76 and 88 output signals, direct current channel comprises amplifier 70 respectively for direct current channel and communication channel, its non-inverting input ground connection and its inverting input is linked resistance 59, and resistance 59 is linked the non-inverting input of amplifier 56 and 54 again.The output of amplifier 70 feeds back to its inverting input through resistance 72 and shunt capacitance 74.Dc channel circuit 71 is signal follower, its filtering AC signal.

Communication channel comprises amplifier 78, and diode 79 is linked in its output.The output of diode 79 feeds back to the inverting input of amplifier 78.The non-inverting input of amplifier 78 is linked resistance 86(, and it also is coupled to ground) and capacitance 84(it be coupled to the non-inverting input of amplifier 54 and 56).Diode 79 is also linked parallel connection and is linked the resistance 80 and the electric capacity 82 on ground.Communication channel circuit 77 is here as halfwave rectifier and peak detector.It is coupled to the input signal of input 48 through electric capacity 84, thereby has got rid of direct current signal.Each amplifier 54,56,70 and 78 for example can be Harris 4741 amplifiers.

Like this, analog signal adjuster 6 is that each produces 4 signals (posivtive spike, negative peak, DC level and AC level) among the transducer S1-SN.These signals are coupled to the analog multiplexer 8 that is shown in Fig. 1.Like this, if 16 transducers are arranged, promptly S1 is to S16, and analog multiplexer 8 is always selected a signal 64 input signals of self simulation signal conditioner 6 (from the signal of each transducer generation).On " signal selection " input, selected by microcomputer 14 by the output that analog multiplexer 8 produces.Like this, if 64 signals are input to analog multiplexer 8 by analog signal adjuster 6, microcomputer 14 selects an input signal as the output signal for analog-digital converter 10 processing on the holding wire 9 through 6 binary codes that are coupled to " signal selection " input uniquely.By these signals being coupled to current sink (currentsink) 12, this multiplexer 8 also is used for AC and surging signal are reduced to zero.

The signal that analog-digital converter 10 receives self simulation multiplexer 8 in ± 100 amperes scope with 50 milliamperes resolution digitalization.Be coupled to microcomputer 14 from the numeral output that analog-digital converter 10 comes out.Will narrate as following, microcomputer 14 compares signal that receives from analog-digital converter 10 and the preset parameter of determining warning and/or alert if.Analog to digital converter 10 can be common for example MAXIM162, and it is a kind of commercially available 12 and approaches analog-digital converter one by one.

If surpass preset parameter from transducer S1 detected signal of any in the SN, then stored and, for example printing on the terminal 18 to all detection signals of SN through serial i/o interface 16 from transducer S1.Signal by microcomputer 14 for example the serial communication interface through linking serial i/o interface 16 be transferred to terminal 18.Interface 16 is converted to for example RS232 level (its signal ground equals the earth) to the digital signal by microcomputer 14.

Serial i/o interface 16 comprises at least two two-way I/O passages, and one is used for to teletype writer terminal 18 transmission information and receives its information, another be used for and modulator-demodulator 20 between transmission and reception information.Transmission to teletype writer (or printer) terminal 18 is used for producing at the scene a hard copy.Can transmit to central station (not shown) by telecommunication medium to the transmission of modulator-demodulator 20 from serial i/o interface 16.In addition, as described below, from the signal of modulator-demodulator 20 at a distance central station requirement and start the dump (downloading) of hall effect sensor status report.Serial i/o interface 16 can be commercially available interface, and for example the National semiconductor 324.

The report that produces comprises the time and date information that is produced by real-time clock 22.Microcomputer 14 receives these data of self-clock 22 and can control clock and makes it to reset, so that for example transfer the reflection summer time to.Also be used to trigger readout clock so that produce report from the signal of microcomputer 14 to real-time clock 22 transmission.

Ground system monitor of the present invention is under micro processor controls.Microcomputer 14 for example comprises for example HD64180 of Hitachi of 8 commercially available microprocessor.Microcomputer 14 comprises that also at least one ROM24 that is used for storage system program and application program and at least one are used for the RAM26 of stored program, sensing data and other data.The content of RAM26 when power-fail, is preserved by the battery backup that is used in combination with power supply 2.

Fig. 4 and Fig. 5 are the flow charts that is described in according to the operating sequence of carrying out during microcomputer 14 monitoring grounding systems in the exemplary embodiments of the present invention.At first with reference to Fig. 4, as shown in Figure 4, at square frame 100, in case start (or system replacement back), microcomputer 14 promptly carries out initialization to system.For example, the CPU register is initialised so that suitable operation to be provided.In addition, modulator-demodulator 20 places suitable Transmission bit rate.For frame 100, for example, if receive the request of teletype writer 18 or modulator-demodulator 20, when requiring the status report of transducer, then will produce interruption, and make microcomputer 14 suspend all other processing and its register is carried out initialization so that once requiring just to produce earthing conductor warning/status report.In addition, after power-fail, square frame 100 enters system initialization to recover from power failure.

Then, shown in frame 102, the reading zero setting of all the sensors S1 to SN.At this moment, be shown in electric capacity 62 and 64 discharges of Fig. 3, thereby obtain the zero output reading.Like this, previous detected surge is eliminated the influence of dateout report afterwards.Thereby after the earthing conductor sensor groups was scanned at every turn, dateout was changed to zero.

Then, all passages are scanned, so that obtain data (frame 104) through analog-digital converter 10 from transducer S1 to SN.Microcomputer 14 is stored the expression positive and negative surging signal of each transducer S1 to SN, the numeral of AC level and DC level signal in RAM26 for example.

Then, shown in frame 106, the reading of each transducer is regulated one " compensation " value.About the offset of transducer, notice that when main menu (main menu) shows (these linking frame 120 narrations below), the user can select " sensor compensation is set " inlet.By selecting this main menu inlet, " compensation " of each transducer can be set.What get in this respect, is the reading of the hall effect sensor set-point of being about to be provided with.But this reading (desirable should be zero) is not arranged on the reading of the transducer around the earthing conductor, but the reading in the zone that sensing is about to be provided with.Such reading has reflected earth magnetic field or other factor that must compensate.Each transducer is all got a large amount of this readings and averaged.With reference to frame 106, the average reading of each transducer is as " compensation ", and these offsets are stored among the RAM26.

Thereby in frame 106, each value that receives from analog to digital converter 10 is adjusted, and the offset so that the reflection front is determined obtains more accurate reading thus.For example, if be 1 ampere and the reading of its generation is 5 amperes, in frame 108, it is 4 amperes then with the value of predefined parameter comparison to transducer S1 offset.

Then, the threshold parameter of the adjusted reading of each transducer S1 to SN and selector channel compares (frame 108).Conducting a survey at frame 109, whether controlled reading is surpassed to determine putting fixed parameter.If parameter is not exceeded, determine whether that then regulation will report (frame 110) every day.To not report that if stipulate every day then program is returned all passages of frame 104 multiple scannings.If the inspection of frame 109 points out that parameter surpasses, then send report through frame 114.

If regulation will be reported then check to determine whether sent report today at frame 112 every day.In this way, then program is returned frame 104 to repeat the scanning of all passages.If the report of every day is not sent as yet, then shown in frame 114, on teletype writer 18, produce the report of every day.Do an inspection to determine whether stipulating also and will report that if do not stipulate that then program is returned frame 104 through modulator-demodulator 20 reports, multiple scanning in proper order at frame 115 through modulator-demodulator.

If except that sending the report on teletype writer 18, also regulation will be reported through modulator-demodulator, then dials a number of predesignating.If did not answer in 30 seconds the dialing back, then program is returned frame 104.If answer is arranged, then report is transferred to remote station (frame 116).Then, program is returned frame 104, continues scanning and other treatment step in frame 104-114.

Get back to Fig. 5 now, if an expectant control character is imported into by teletype writer 18, then microcomputer produces and interrupts (frame 118).It is owing to the control character (for example C) that detects from teletype writer 18 is triggered that microcomputer 14 interrupts.Microcomputer 14 forwards to and starts the single program part (frame 120) that shows in main top.If control character does not detect at frame 118, then program forwards frame 128 to, restarts conventional treatment.

Shown in frame 120, by the main menu inlet of selecting one to be shown in the demonstration of Fig. 5, the user can start the controlled function of a ground system monitor.About this point, by selecting to be shown in an inlet of frame 120, the operator can visit more detailed menu, puts fixed parameter so that time, the scheduled time of being defined in generation report every day are set and start to list.

" parameter list " starts the threshold value that will compare with it with the data that retrieve the hall effect sensor generation the visit of RAM26.If select " parameter is set ", then can change parameter.If select " sensor compensation is set ", then can be set up with the interrelate offset of narration of frame 106 by main menu.Note, if the operator will change or be provided with parameter or the sensor compensation value is set, the access code of an approval of system requirements input.

If the operator selects " parameter is set " inlet on main menu, then produce demonstration as shown in Figure 6.As shown in Figure 6, if the operator wants to keep the parameter relevant with for example earthing conductor 1 or earthing conductor 2, then the operator should press empty the triggering every (at interval) bar (spacebar) latter and enter next parameter.As revising parameter, press enter key, indication is arranged simultaneously, and how input parameter is revised the information indicating of data to the operator.Parameter must be with 2 bit digital heel decimal points, and the back is that mode enters numeral more than 2 (for example 08.35), must be 0 or 5 at last again.

Shown in frame 120, the operator can start the report of generation electric current according to nearest sensor value." report regulation " mode allows the operator to select to produce report through teletype writer 18 or modulator-demodulator 20.If select the modulator-demodulator mode, the operator is prompted to import the used telephone number of above-mentioned frame 116.Put calmly if restart the routine operation mode, then program is returned the frame 100 that is shown in Fig. 4.

Get back to frame 130 then, if microcomputer 14 through serial i/o interface 16, detects carrier signal from modulator-demodulator 20, then common handling interrupt, procedure operation prompting calling subscriber (calling party) imports corresponding access code (frame 132).Do an inspection then to determine access code whether effectively (frame 133).If invalid, then program forwards frame 128 to, makes program turn back to that of interruption.By using access code, unauthorized user just can not enter system.If access code is effective, then enters system and show main menu (frame 120).

Shown in frame 121, if if the main menu of being selected by the operator is to restart routine operation or modulator-demodulator (its existence is detected in frame 130 by microcomputer 14) off line, then program forwards frame 128 to and the recovery routine operation.But if the operator determines to be provided with parameter or offset, or regulation reports that by modulator-demodulator then shown in the inspection that frame 122 is done, the operator is required that input parameter changes access code (frame 124).Then, doing one whether effectively checks to determine access code (frame 125).If access code is effective, then carries out main menu requirement (frame 126) and turn back to main menu through frame 120 programs.If access code is invalid, then Invalid parameter is changed access code information and be shown to the operator, program turns back to main menu.Return frame 122 now, do not report that through modulator-demodulator then main menu requires to be performed (frame 126) if the response of main menu do not related to parameter or offset being set or not relating to regulation.

Fig. 7 A and Fig. 7 B are the typical alarm reports that the place produced that microprocessor-controlIed grounding system of the present invention is housed.The alarm report of Fig. 7 A and 7B illustrates the time and date that produces alarm report.If the relatively announcement parameter in Fig. 4 109 frames is exceeded, then these reports produce automatically.Shown in Fig. 7 A and 7B, alarm report has been pointed out the transducer that identifies, AC and DC current surge in the place that identifies.

Though the present invention is described in conjunction with most preferred embodiment, be appreciated that to the invention is not restricted to the above-mentioned embodiment that has disclosed that on the contrary, it is included in the interior various modifications and of equal value setting of spirit and scope of appended claim.

Claims (20)

1, a kind of ground system monitor that is used to have the electric equipment of the grounding system that comprises a plurality of earthing conductors is characterized in that comprising:

Be used for monitoring the device of electric current of each conductor of described a plurality of earthing conductors;

Be used for signal that is illustrated in the electric current that each described earthing conductor flows through and the processing unit that predetermined threshold compares;

Be used for be illustrated in monitor on each described earthing conductor the signal of electric current be coupled to the device of described processing unit;

Described processing unit comprises that described device, the startup that is used for comparison of response produces the device of indication report of electric current on described earthing conductor;

Respond described processing unit, be used to produce the output device of described report;

Be coupled to describedly be used for device for monitoring, in order to the device of the AC and DC current surge signal of each conductor of producing the described a plurality of conductors of expression; With

Be used for producing the device of each the conductor AC and DC current level signal that is illustrated in described a plurality of conductors.

2, ground system monitor as claimed in claim 1 is characterized in that, the described device for monitoring that is used for comprises the hall effect sensor that interrelates with described each earthing conductor.

3, ground system monitor as claimed in claim 1, it is characterized in that, the described device that is used to be coupled comprises, is used to receive from the described a plurality of inputs that are used for device for monitoring and producing a multipath conversion apparatus that is illustrated in the output signal of streaming current on of described a plurality of earthing conductors on its output selectively.

4, ground system monitor as claimed in claim 3, it is characterized in that, described processing unit comprises, be used to control the scanning means of the reception of the data relevant with each earthing conductor, described scanning means comprise be coupled to described multipath conversion apparatus, that be used to discern a plurality of inputs which will be coupled to the device of described output.

5, ground system monitor as claimed in claim 1 is characterized in that further comprising, is coupled to reservoir unit described processing unit, that be used to store the relevant data of streaming current on each conductor with described earthing conductor.

6, ground system monitor as claimed in claim 1 is characterized in that further comprising, is used for described report is transferred to the device in place, a distant place.

7, ground system monitor as claimed in claim 1 is characterized in that, each conductor of described a plurality of earthing conductors be coupled to a main earthing strip and be used to produce the flow through hall effect sensor of signal of described earthing conductor electric current of expression and interrelate.

8, ground system monitor as claimed in claim 1 is characterized in that, described processing unit comprises the interactive apparatus that allows the operator to start the ground system monitor controlled function.

9, ground system monitor as claimed in claim 1 is characterized in that, described processing unit comprises and is used to make the operator that the device of described predetermined threshold can be set.

10, ground system monitor as claimed in claim 1 is characterized in that, described processing unit comprises, is used to regulate the signal of streaming current on described each conductor that is illustrated in described a plurality of earthing conductors, with the device of compensate for environmental conditions.

11, ground system monitor as claimed in claim 1 is characterized in that, described electric equipment comprises the device of finishing the phone switch operating.

12, a kind of method of that use in the electric equipment with the grounding system that comprises a plurality of earthing conductors, the grounding system that is used to monitor described electric equipment is characterized in that comprising the following steps:

The electric current that monitoring is flowed on each of described a plurality of earthing conductors;

Generation is illustrated in the signal of streaming current on each described earthing conductor;

Processing list is shown in the signal of streaming current on each described earthing conductor; With

Generation shows the report of streaming current on each described earthing conductor.

13, method as claimed in claim 12 is characterized in that, described treatment step comprises signal that is illustrated in the streaming current on each described earthing conductor and predetermined threshold step relatively.

14, method as claimed in claim 12 is characterized in that, further comprises the step of the signal of the AC and DC current surge of each of the described a plurality of earthing conductors of generation expression.

15, method as claimed in claim 12 is characterized in that, further comprises, produces each that be illustrated in described a plurality of earthing conductors and goes up the step of the signal of interchange and direct current level.

16, method as claimed in claim 12 is characterized in that, described treatment step comprises, controls the step of the Data Receiving relevant with each earthing conductor.

17, method as claimed in claim 12 is characterized in that, further comprises, stores the step of the data relevant with streaming current on each described earthing conductor.

18, method as claimed in claim 12 is characterized in that, further comprises, described report is transferred to the step in place, a distant place.

19, method as claimed in claim 12 is characterized in that, described treatment step comprises, allows the operator to start the step of ground system monitor controlled function with interactive mode.

20, method as claimed in claim 12 is characterized in that, described treatment step comprises, regulates the described signal that is illustrated in the streaming current on each of described a plurality of earthing conductors, with the step of compensate for ambient factor.

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