CN209198637U - Port machinery equipment Hall transformer test device - Google Patents

Abstract

The utility model discloses a kind of port machinery equipment Hall transformer test devices, mainly include Switching Power Supply, LED amplitude features indicating circuit, output operation detecting circuit, digital display meter, strong current generator, A.C. voltmeter, delay operation detection reference voltage table, output operation detection reference voltage table；According to Hall transformer detection output 0-4V ac voltage signal value, the size of corresponding primary side load current is used as foundation to carry out sampling comparison, with the output load current of strong current generator substitution driver, the conducting wire of strong current generator is passed through from Hall transformer centre bore, closed loop is formed to strong current generator, it is made to generate load current.The utility model is mainly used for test driver Hall transformer working condition when ports handling machine works and runs, reach Hall transformer not and also can really reflect on a drive operating condition when work, so as to effectively test Hall transformer state, and zero-bit and range-adjusting and identification are carried out in testing, come whether differentiating normal.

Description

Port machinery equipment Hall transformer test device

Technical field

The utility model relates to the fields of the electrical automation technology of container terminal handling technologies and equipment, and in particular to Yi Zhonggang Machine equipment Hall transformer test device.

Background technique

The capital equipment at harbour is bridge crane, gantry crane, and the dragging of the main electric-control system of these port machinery equipments mostly uses day Intrinsic safety river driver, UND-600/600 (4V/600AT) Hall transformer used in driver are peace river customed products, it The necessary electromechanical automatic for carrying out detection monitoring controlling of sampling protection to motor load electric current to raising, cart, trolley etc. is fed back Device is that modern automation industrial control equipment often uses one of device.Hall transformer is all mounted on driver three-phase on port machinery equipment On load outputs, as service life increases, the failure of Chang Fasheng Hall transformer exception especially occurs in Hall transformer When zero shift, failure can reset automatic disappearance sometimes, in cutting in and out, be not easy adjustment judgement.

Hall transformer service life in the machine driver of port is longer, general service life after 6-8 or so, Chang Fasheng Drift or damage in Hall transformer parameter, this device are all that import producer has matched Hall transformer made to order.From technology angle Degree considers, the zero-bit and range value in Hall transformer can be adjusted as the drift in parameter, parameter is made to meet the requirements, It can continue to use, mutate or abnormal deviation when it exports AC signal, can only replace first wife's device, and with other mutual inductors Then it is difficult to replace, main bottleneck is embodied in parameter correctness and installation volume problem, so often replacing original-pack mutual inductor, more It is big to change maintenance cost.Beilun In Ningbo trans-container harbour Co., Ltd all drives electric-control system using peace river substantially, and Hall is mutual Sensor is applied on the peace river driver of these port machines.And Hall transformer working method is adopted to load current detection The necessary electromechanical automatic feedback device of sample control, forms automation control.It breaks down in reason in driver, it is mutual by Hall Driver malfunction accounting example caused by sensor is also higher.In view of the foregoing, for be easier adjustment Hall sensor zero-bit and Amplitude and judge mutual inductor superiority and inferiority, in the hope of reaching quick-replaceable and saving the principle of fittings cost, needs a port machine Hall mutual Sensor test device, simulation Hall transformer carry out testing and debugging and judge Hall mutual inductance under the operation of internal drive real working condition Device.

Utility model content

The purpose of the utility model is to overcome the shortcomings of the prior art, and provide a kind of port machinery equipment Hall mutual inductance Device test device.

The purpose of this utility model is completed by following technical solution: this port machinery equipment Hall transformer test Device mainly includes Switching Power Supply, LED amplitude features indicating circuit, output operation detecting circuit, digital display meter, high current generation Device, A.C. voltmeter, delay operation detection reference voltage table, output operation detection reference voltage table；It is examined according to Hall transformer Output end 0-4V ac voltage signal value is surveyed, the size of corresponding primary side load current is used as foundation to carry out sampling comparison, With the output load current of strong current generator substitution driver, the conducting wire of strong current generator is worn from Hall transformer centre bore It crosses, closed loop is formed to strong current generator, it is made to generate load current；When strong current generator three-phase exports no-load current feelings Under condition, the output signal of Hall transformer is also zeroed, in strong current generator threephase load size of current ratio, Hall transformer Secondary side output AC voltage signal should be risen by corresponding proportion；Rise beyond ratio or rise not in scale or do not rise, all It can assert Hall transformer exception, zero-bit or range-adjusting are carried out to Hall transformer according to ratio situation, when adjustment can not When reaching normal parameter, it can only replace at this time.

The LED amplitude features indicating circuit: it is indicated using digital circuit and luminous tube, to distinguish tested Hall mutual inductance One circuit of device signal output amplitude grade size；When detecting normal operation, the signal amplitude value pair of Hall transformer output It answers a luminous tube to shine, illustrates not within the scope of this range value if not shining；Different light emitting diodes is lighted then to represent The reference frame of Hall transformer signal output amplitude grade size.

Further, the LED amplitude features indicating circuit: X1 is power input, and X2 is current transformer, According to the size of load current, thus the ac voltage signal output for keeping Hall transformer output end output 0-4V variable；X3 is Signal output AC voltage display, X4, X5, X6, X7, X8 are that LED exports display lamp, and U3, U4 are LM339 voltage comparator； U5 is 74HC04N, is the silicon gate CMOS device of high speed, and the TTL NOT gate of compatible low-power consumption Schottky, and U6, U7, U8 are 4 group 2 defeated Enter AND gate circuit CD4081；When conducting wire passes through Hall transformer centre bore, and has load current to flow through, Hall transformer is then examined Measure electric current；The detection signal output end of Hall transformer has exchange 0-4V voltage to show over the display when normal；The exchange Voltage signal obtains a direct-flow signal voltage after D15, C6, R10 rectifying and wave-filtering, and the voltage after rectifying and wave-filtering is rectification filter 1.414 times of wavefront, U3 and U4 inverting input terminal have 5 reference voltages, and Hall transformer signal end exports the alternating voltage of IN Respectively 0V, 0.5V, 1.5V, 2.5V and 3.5V.

The output operation detecting circuit: 1 or 3 Hall transformers are serially connected in three-phase output current loop, Tri- tunnel U1, V1, W1 of output represents the ac voltage signal of output size of current, and 3 inside U10 four-operational amplifier LM348 Group amplifier and peripheral cell constitute three tunnel precision half-wave rectifiers, will input the negative half-wave paraphase of 3 phase ac voltage signals At positive voltage signal, it is input to and inverting amplifier is constituted by the 4th group of operational amplifier inside U10 four-operational amplifier LM348 Input terminal exports negative I/UVW full current signal, and I/UVW is divided into two-way again, is sent into rear class on-off model processing circuit.

This port machinery equipment Hall transformer test method described in the utility model, this method comprises the following steps: first The conducting wire of strong current generator is passed through from Hall transformer centre bore first, closed loop is formed to strong current generator, makes its generation Load current；Successively test device and strong current generator are powered on, by the 0-600A parameter of Hall transformer to big electricity Flow-generator enhances electric current, when Hall transformer centre bore passes through primary side input 50A under normal circumstances, the output of secondary side signal Detected value 0.33V/AC, the output detection value 0.67V/AC in 100A, as 600A output detection value 4.00V/AC, Output operation detecting circuit is compared each secondary side signal output detection value at this time, and corresponding indicator light is lighted, while secondary Side relevant voltage value is shown on digital display meter；The secondary output rule of the numerical value and Hall transformer shown to indicator light and digital display meter Definite value is compared, as larger in found to have any different after detection, be can determine that the Hall transformer is problematic, is passed through zero-bit or amplitude It is adjusted；When adjustment can not reach output specified value, it may be determined that Hall transformer damage.

The utility model has the following beneficial effects:

1, the utility model measuring accuracy is high, mainly solves the adjustment of test mutual inductor and distinguishes between good and bad；With it is small in size, The characteristics of conveniently moving, real-time working condition simulation height, the high and low cost of test accuracy, low-power consumption, low complex degree, to mutual inductor Maintenance repairs detection work belt and carrys out great convenience, has a test equipment smoothly to electrical apparatus technology personnel, solves technical problem, It allows mutual inductor to be fully used, reduces Hall transformer acquisition cost, avoid because of mulual inductor malfunction bring driver malfunction, To influence production operation situation；The utility model can also expand the mutual inductor application test job being applied in other industries.

2, the utility model is mainly used for test driver Hall transformer work when ports handling machine works and runs Make state, reach Hall transformer not and also can really reflect on a drive operating condition when work, so as to effective right Hall transformer state is tested, and carries out zero-bit and range-adjusting and identification in testing, come whether differentiating normal.

Detailed description of the invention

Fig. 1 is the electric appliance block diagram of the utility model.

Fig. 2 is that the LED amplitude features of the utility model indicate electrical schematic.

Fig. 3 is that the operation of the utility model detects displaying principle figure.

Fig. 4 is the shape panel schematic diagram of the utility model.

Specific embodiment

Detailed introduction is done to the utility model below in conjunction with attached drawing:

As shown in Figure 1, the utility model is mainly according to Hall transformer detection output 0-4V ac voltage signal value, The size of corresponding primary side load current is used as foundation to carry out sampling comparison.The defeated of driver is substituted with strong current generator Load current out, in the case of driver (strong current generator) three-phase exports no-load current, the output of Hall transformer is believed It number is also zeroed, in driver threephase load size of current ratio, mutual inductor secondary side output AC voltage signal should be by corresponding ratio Example rises.Rise beyond ratio or rise not in scale or do not rise, mutual inductor exception can be all assert, according to ratio situation to mutual Sensor carries out zero-bit or range-adjusting, when adjustment can not reach normal parameter, can only replace at this time.

One, Hall transformer test device power solution:

Working power solution: model NET-35C Switching Power Supply, power input 100-240VAC wide electricity are used Source exports the 2.5A power supply of the 1A for stable+15V, the 0.5A of -15V ,+5V.Can meet completely transformer for supplying power and digital display and The power reguirements of signal processing circuit power supply, and have the advantages that small in size, therefore select this power supply.

Two, detection circuit key components and application:

According to the adjustment requirement of mutual inductor, to the integrated circuit type selecting major parameter of current detecting: inside LM348 integrated package There are four independent operational amplifiers for dress, and working characteristics: 1) low source current consumption, AB class output stage is without cross distortion；2) Low input offset voltage is compatible: the typical case of 1mV；3) low input bias current: 4na is typical；4) low input bias current: 30na allusion quotation Type；5) gain bandwidth (unit gain): 1.0mhz is typical；5) isolated amplifier: there is the 120db of input and output overload to protect Shield, supply voltage are maximum 36V.

The characteristics of independent voltage comparator there are four dresses inside LM339 integrated package, the voltage comparator, is: 1) imbalance electricity Press small, representative value 2mV；2) supply voltage range is wide, single supply 2-36V, and dual-supply voltage is ± 1V- ± 18V；3) it compares It is limited compared with the internal resistance of signal source wider；4) common mode range is big；5) differential input voltage range is larger, big electric to that can be equal to power supply Pressure；6) output terminal potential can be selected flexibly and easily.

For the ac voltage signal value of Hall transformer output, therefore operation is carried out with LM348 and LM339 and compares detection, All there is independent four high guaily unit, working power voltage range is wide, and peripheral circuit is simple, the stable feature of performance inside the two.

Three, digital display meter feature and type selecting:

Exchange the alternating-current meter that digital display uses three Semi-digital SM3DC-AV20 direct current supply, feature: 7 sections of LED are shown, are handed over Signal measurement is flowed using precise rectification circuit, measurement is accurate, good linearity, and standard power supply is DC5V, it powers and signal internal insulation, A power supply can be shared with a variety of instrument.The above feature equality circuit requirement, therefore select such model.

Suitable for accurate measurement and the higher occasion of stability requirement, direct current digital display is widely applied and uses three Semi-digitals The alternating-current meter of HB5135B direct current supply, feature: in various instrument and meters, the measurement of the parameters such as voltage, the electric current of electromechanical equipment And display, direct current 5V power supply, 0.56 inch of red LED digital-scroll technique are clear, stable.The above feature equality circuit power supply, display Reading requires, therefore selects such model.

Four, the utility model LED amplitude features indicate working principle introduction:

In order to more understand intuitively there is obvious differentiation to mutual inductor output signal value size, LED letter is devised again thus Number sizes values discrimination circuit, designs 5 segment signal value instruction devices altogether, is 0V, 0.5V, 1.5V, 2.5V and 3.5V reference field respectively Indicated value, the specific working principle is as follows, as shown in Figure 2.

X1 is power input, and X2 is current transformer, according to the size of load current, to make Hall current mutual inductance Device output end exports the variable ac voltage signal output of 0-4V.X3 is signal output AC voltage display.X4,X5,X6, X7, X8 are that LED exports display lamp.U3, U4 are LM339 voltage comparator.U5 is 74HC04N, is the silicon gate CMOS device of high speed, And the TTL NOT gate of compatible low-power consumption Schottky.U6, U7, U8 are 4 group of 2 input AND gate circuit CD4081.

When conducting wire passes through Hall current mutual inductor centre bore, and has load current to flow through, mutual inductor then detects electric current. The detection signal output end of current transformer has exchange 0-4V voltage to show over the display when normal.Ac voltage signal warp After D15, C6, R10 rectifying and wave-filtering, a direct-flow signal voltage is obtained, before the voltage after rectifying and wave-filtering is about rectifying and wave-filtering 1.414 again.U3 and U4 inverting input terminal has 5 reference voltages, and the alternating voltage of Hall transformer signal end output IN is respectively 0V, 0.5V, 1.5V, 2.5V and 3.5V.

When the detection signal output end of current transformer, export when being added in wiring board IN for the voltage signal of 0-0.5V, B1 Have output then for high level, B2, B3, B4, B5 are then low level without output, the signal exported after U5 phase inverter E1, E2, E3, The high level of E4.By U6/CD4081 AND gate circuit by 5 high level state Xiang Yuhou of B1, E1, E2, E3, E4, output is high Level goes to light the LED1 at the end X4, it is promoted to shine.The current transformer detection output signal is between 0-0.5V at this time.

When the detection signal output end of current transformer, export when being added in wiring board IN for the voltage signal of 0.5-1.5V, B1, B2 have output then for high level, and B3, B4, B5 are then low level without output, the signal export after U5 phase inverter be E2, E3, The level of E4.By U6/CD4081 AND gate circuit by 5 high level state Xiang Yuhou of B1, B2, E2, E3, E4, high electricity is exported The flat LED2 for going to light the end X5, promotes it to shine.Since B2 state is converted from low to high, thus the LED1 at the end X4 loses signal and puts out It goes out.The current transformer detection output signal is between 0.5-1.5V at this time.

When the detection signal output end of current transformer, export when being added in wiring board IN for the voltage signal of 1.5-2.5V, It is high level that then B1, B2, B3, which have output then,.And B4, B5 are then low level without output, which exports after U5 phase inverter as height Level E3, E4.With AND gate circuit by B1, B2, B3, E3, E4 totally 5 high level state phases with output high level goes to light the end X6 Luminous tube LED3.At this point, the luminous tube LED2 at the end X5 extinguishes because the state of B3 changes.Illustrate that the current transformer is examined at this time Output end signal is surveyed between 1.5-2.5V.

When the detection signal output end of current transformer, export when being added in wiring board IN for the voltage signal of 2.5-3.5V, It is high level that then B1, B2, B3, B4, which have output then,.And B5 is then low level without output, which exports after U5 phase inverter as height Level E4.With AND gate circuit by B1, B2, B3, B4, E4 totally 5 high level state phases with output high level goes to light the hair at the end X7 Light pipe LED4.Become high level from low level because of B4 at this time, causing the state of E3 to change extinguishes the luminous tube LED3 at the end X6.This When illustrate the current transformer detection output signal between 2.5-3.5V.

When the detection signal output end of current transformer, export when being added in wiring board IN for the voltage signal of 3.5V or more, It is high level that then B1, B2, B3, B4, B5, which have output then,.With AND gate circuit by B1, B2, B3, B4, B5 totally 5 high level state phases With, output high level go to light the luminous tube LED5 at the end X8.Become high level from low level because of B5 at this time, the state of E4 is caused to change Change extinguishes the luminous tube LED4 at the end X7.Illustrate the current transformer detection output signal in 3.5V or more at this time.

This partial circuit of the utility model is indicated using digital circuit and luminous tube, defeated to distinguish tested transducer signal A circuit of magnitude level size out.When detecting normal operation, the corresponding luminous tube of the signal amplitude value of mutual inductor output It shines, illustrates not within the scope of this range value if not shining.Lighting different light emitting diodes, then to represent transducer signal defeated The reference frame of magnitude level size out.

Five, the utility model detection circuit introduction:

As shown in figure 3, X10 is power supply power supply input terminal, input+15V, -15V ,+5V, wherein+15V, -15V are used for Hall Mutual inductor and IC power supply ,+5V is for the power supply such as core circuit and digital display meter.X11, X12, X13 are 3 current transformers, 3 electricity Current transformer is serially connected with three-phase output current loop, and output tri- tunnel UI, VI, WI represents the alternating voltage letter of output size of current Number.U10, U11 LM324 are the four-operational amplifiers with very differential input.U12 is LM339, is voltage comparator.U13 It is TL431 with U14, is the controllable regulated power supply of precision.

The detection circuit principle of the utility model: 1 or 3 Hall transformers are serially connected with three-phase output current loop In, tri- tunnel U1, V1, W1 of output represents the ac voltage signal of output size of current.Inside U10 four-operational amplifier LM348 3 groups of amplifiers and peripheral cell constitute three tunnel precision half-wave rectifiers, by input 3 phase ac voltage signals negative half-wave fall It coordinates positive voltage signal, is input to and is made of reverse phase amplification the 4th group of operational amplifier inside U10 four-operational amplifier LM348 Device input terminal exports negative I/UVW full current signal, and I/UVW is divided into two-way again, is sent into rear class on-off model processing circuit.

LM348 has actually constituted three-plase half wave rectifier circuit, and the pulsation of rectified signal I/UVW actually 3 voltage wave heads is straight Signal is flowed, the information containing U, V, W three-phase output electric current.The signal is input to U11 operational amplifier after value effect through clamper 13 feet, constitute voltage shaping circuit, through 14 feet export.

I/UVW signal is sent into the two-stage hysteresis voltage comparator LM339 inverting input terminal being made of U12 simultaneously.Two-stage is slow The in-phase end of stagnant voltage comparator is to form two reference voltages through electric resistance partial pressure by 10V reference voltage, wherein the benchmark of 9 feet Voltage is higher than the reference voltage of 11 feet, and hysteresis voltage comparator output reversion by 5V clamper high level, is changed into the low electricity of 0V clamper Flat, this road exports overcurrent signal, indicates output alarm by LED lighting.If electric current is serious uneven or continues to rise, Current detection signal is input to 8 feet of U12 through resistance, and when voltage value is more than the reference voltage value of 9 feet, 14 foot output states are anti- Turn, the negative signal of output -15V, this road is that significant current is uneven, is shown under digital table voltage when delay runs detection 5V benchmark Drop illustrates that the output of mutual inductor real signal value is larger, and load current is more than specified value.When output runs detection benchmark 2.5V decline When, illustrate wherein there are one or more transducer signal output abnormalities.

Utility model diagram is as shown in Figure 4.It is by Switching Power Supply+LED amplitude features indicating circuit+output operation inspection Slowdown monitoring circuit+digital display device+mechanical stage+can also add the integration such as oscilloscope measurement wavy manner composition, cooperate strong current generator Work.By to installing in each component graphic designs, processing, equipment, testing, rectifying and improving, retesting, according to operating condition item Part designs a test device of the Hall transformer in the operation of different loads current segment.Hall transformer is according to driving The load current size of device output, output sampled signal reflect load current size with the form that alternating voltage shows.Port The load current of machine driver output is exactly the sampling and outputting voltage by mutual inductor, it is with the rule of 600:4, that is works as driving Device is exported in 600A at full capacity, and the voltage signal of Hall transformer output is 4V, i.e., load output size of current corresponds to suddenly The ratio value of your mutual inductor secondary side voltage output signal.According to this scale parameter value, we, which can integrate, passes through oscillograph Voltage waveform and the corresponding current detection circuit of production are measured to adjust the zero-bit or range value of identification Hall transformer.This is surveyed It is exactly driver Hall transformer working condition when ports handling machine works and runs that trial assembly, which sets main application to be equal to,.Reach suddenly Your mutual inductor can not reflect operating condition when work really on a drive yet, so as to effectively to Hall transformer state It is tested, and carries out zero-bit and range-adjusting and identification in testing, come whether differentiating normal.

Hall transformer test device requires process:

Utility model device has selected Yangzhou can China to adapt to load current demand when Hall transformer test The NHLP-1000A strong current generator of Electrical utility firms production, which is according to power department and industrial and mining enterprises electrical Equipment test is such as: various switches, current transformer and other electrical equipments are made current loading test and temperature rise test and are specially set Count the special equipment of manufacture.This current feedback circuit fictitious load electric current, it is adjustable from 0-1000A, fully meet harbour driver The requirement of Hall sampling load current 0-600A.

Hall transformer test device detects control flow: first by the conducting wire of strong current generator from Hall current mutual inductance Device centre bore passes through, and forms closed loop to current feedback circuit, purpose makes it generate load current.Successively to test device and high current Generator powers on, and enhances electric current to strong current generator by the 0-600A parameter of mutual inductor, under normal circumstances Current Mutual Inductance When device centre bore passes through primary side input 50A, secondary side signal output detection value 0.33V/AC, the output detection value in 100A 0.67V/AC and so on, the output detection value 4.00V/AC as 600A, detection circuit exports each secondary side signal and examines at this time Measured value is compared, and corresponding indicator light is lighted, while secondary side relevant voltage value is shown on digital display meter.By naked eyes to instruction The numerical value that lamp and digital display meter are shown can be easily compared, as sent out after detection with Current Transformer Secondary output specified value Existing difference is larger, can determine that the mutual inductor is problematic, can be adjusted by zero-bit or amplitude, when adjustment can not reach To when exporting specified value, it may be determined that mutual inductor damage.

This transformer test device can expand oscillograph and survey waveform: the utility model is also to transducer signal value with waveform Mode detects.So intuitively being observed in conjunction with oscillograph mutual inductor output waveform, tracked by measurement, cooperates detection circuit Zero-bit or range-adjusting more easily are carried out to mutual inductor.

It is understood that it will be understood by those skilled in the art that the technical solution of the utility model and utility model structure Think of is subject to equivalent substitution or change all and should belong to the protection scope of the utility model the attached claims.

Claims (4)

1. a kind of port machinery equipment Hall transformer test device, it is characterised in that: mainly include Switching Power Supply, LED amplitude features Indicating circuit, output operation detecting circuit, digital display meter, strong current generator, A.C. voltmeter, delay operation detection reference voltage Table, output operation detection reference voltage table；It is corresponding primary according to Hall transformer detection output 0-4V ac voltage signal value The size of lateral load electric current is used as according to sampling comparison is carried out, with the output loading electricity of strong current generator substitution driver Stream, the conducting wire of strong current generator are passed through from Hall transformer centre bore, form closed loop to strong current generator, generate it negative Carry electric current；In the case of strong current generator three-phase exports no-load current, the output signal of Hall transformer is also zeroed, by big Current feedback circuit threephase load size of current ratio, Hall transformer secondary side output AC voltage signal should be by corresponding proportion It rises；Rise beyond ratio or rise not in scale or do not rise, Hall transformer exception can be all assert, according to ratio situation to suddenly You carry out zero-bit or range-adjusting by mutual inductor, when adjustment can not reach normal parameter, can only replace at this time.

2. port machinery equipment Hall transformer test device according to claim 1, it is characterised in that: the LED amplitude Differentiate indicating circuit: being indicated using digital circuit and luminous tube, it is big to distinguish tested Hall transformer signal output amplitude grade A small circuit；When detecting normal operation, the corresponding luminous tube of the signal amplitude value of Hall transformer output shines, if not It is luminous then illustrate not within the scope of this range value；It lights different light emitting diodes and then represents Hall transformer signal output amplitude The reference frame of grade size.

3. port machinery equipment Hall transformer test device according to claim 1, it is characterised in that: the LED amplitude Differentiate indicating circuit: X1 is power input, and X2 is current transformer, according to the size of load current, to keep Hall mutual Sensor output end exports the variable ac voltage signal output of 0-4V；X3 be signal output AC voltage display, X4, X5, X6, X7, X8 are that LED exports display lamp, and U3, U4 are LM339 voltage comparator；U5 is 74HC04N, is the silicon gate CMOS device of high speed, And the TTL NOT gate of compatible low-power consumption Schottky, U6, U7, U8 are 4 group of 2 input AND gate circuit CD4081；When conducting wire is mutual across Hall Sensor centre bore, and when thering is load current to flow through, Hall transformer then detects electric current；The detection letter of Hall transformer when normal Number output end has exchange 0-4V voltage to show over the display；The ac voltage signal obtains after D15, C6, R10 rectifying and wave-filtering To a direct-flow signal voltage, the voltage after rectifying and wave-filtering is 1.414 times before rectifying and wave-filtering, U3 and U4 inverting input terminal has 5 A reference voltage, the alternating voltage that Hall transformer signal end exports IN is respectively 0V, 0.5V, 1.5V, 2.5V and 3.5V.

4. port machinery equipment Hall transformer test device according to claim 1, it is characterised in that: the output operation Detection circuit: 1 or 3 Hall transformers are serially connected in three-phase output current loop, tri- Lu Daibiao of U1, V1, W1 of output The ac voltage signal of size of current is exported, the 3 groups of amplifiers and peripheral cell inside U10 four-operational amplifier LM348 are constituted Three tunnel precision half-wave rectifiers, by the negative half-wave paraphase for inputting 3 phase ac voltage signals at positive voltage signal, be input to by The 4th group of operational amplifier inside U10 four-operational amplifier LM348 constitutes inverting amplifier input terminal, exports negative I/UVW Full current signal, I/UVW are divided into two-way again, are sent into rear class on-off model processing circuit.