CN105203824A - Proportional solenoid valve control signal detection method and apparatus, and performance test system - Google Patents
Proportional solenoid valve control signal detection method and apparatus, and performance test system Download PDFInfo
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- CN105203824A CN105203824A CN201410532895.3A CN201410532895A CN105203824A CN 105203824 A CN105203824 A CN 105203824A CN 201410532895 A CN201410532895 A CN 201410532895A CN 105203824 A CN105203824 A CN 105203824A
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Abstract
The invention discloses a proportional solenoid valve control signal detection method and an apparatus, and a performance test system. The apparatus comprises a Hall detector and a current determination unit. The Hall detector is used for generating a measurement voltage signal of a secondary side compensating circuit according to a detected current signal of a primary side, wherein the detected current signal is a proportional solenoid valve control signal. The current determination unit is used for determining a detected current signal according to the measurement voltage signal. A magnetic balance principle is combined with a Hall effect and is applied in acquisition of proportional solenoid valve signals. Through a compensation current, a detected signal is obtained. Any changes of the detected signal can be detected acutely so that random waveform currents and voltage can be measured, wherein an impulse waveform is included. Performance of the detection apparatus is stable, linearity is good, precision is high and a measurement scope is wide.
Description
Technical field
The present invention relates to proportion magnetic valve input field, particularly a kind of proportional solenoid valve control signal detecting method and device and Performance Test System.
Background technology
The control signal that passing ratio solenoid valve receives and input-output characteristic curve that its output signal is formed are one of major criterions of a measurement magnetic valve performance quality, be also technician use, study and design proportion solenoid valve pay close attention to emphasis.
Especially the difficulty gathered pwm signal due to proportion magnetic valve signal is comparatively large, does not also gather the proprietary detection system of proportion magnetic valve signal at present.The process of the performance study of this comparative example electromagnetic valve element own and lifting, for grasping proportion magnetic valve performance in systems in practice and measurement, it also result in larger obstacle to the impact of real system.
Summary of the invention
In view of above technical matters, the invention provides a kind of proportional solenoid valve control signal detecting method and device and Performance Test System, the control signal of proportion magnetic valve can be gathered, and anti-interferencely can carry accurate collection signal easily.
According to an aspect of the present invention, a kind of proportional solenoid valve control signal supervisory instrument is provided, comprises hall detector and current determination unit, wherein:
Hall detector, for producing the measurement voltage signal of secondary compensating circuit according to the tested current signal on former limit, wherein said tested current signal is proportional solenoid valve control signal;
Current determination unit, for determining described tested current signal according to described measurement voltage signal.
In one embodiment of the invention, described current determination unit comprises offset current determination module and tested electric current determination module, wherein:
Offset current determination module, for according to described measurement voltage signal and measured resistance value determination secondary offset current;
Tested electric current determination module, for determining the tested electric current in former limit according to secondary offset current, the secondary coil number of turn and the primary coil number of turn.
In one embodiment of the invention, described hall detector comprises C shape magnet ring, former limit measured signal line, secondary coil, Hall element, amplifying circuit, measuring resistance, wherein:
Magnet ring, for have at former limit measured signal line tested electric current by time, the first magnetic field that former limit measured signal line produces is gathered on Hall element;
Hall element, for when sensing the first magnetic field that magnet ring is assembled, exports Hall voltage;
Amplifying circuit, for amplifying Hall voltage, and forms secondary offset current on the secondary compensating coil of magnet ring, so that secondary offset current produces the second magnetic field by multicircuit winding on magnet ring, to compensate the first magnetic field;
Measuring resistance, is converted to measurement voltage signal for secondary offset current when the first magnetic field being equaled the second magnetic field, and exports to current determination unit.
In one embodiment of the invention, described former limit measured signal line is arranged on the center of C shape magnetic ring inner hole.
In one embodiment of the invention, described device also comprises mounting protection device, and wherein, mounting protection device, for fixedly mounting described hall detector.
In one embodiment of the invention, described mounting protection device adopts aluminum alloy material.
In one embodiment of the invention, described device also comprises anti-interference equipment, described anti-interference equipment comprise resistance and electric capacity composition resistance-capacitance network, described anti-interference equipment one end is connected with the negative pole of hall detector measuring voltage output terminal, the other end be connected in analog.
In one embodiment of the invention, described device also comprises output interface, and described output interface is connected with current determination unit, for outwards exporting described tested current signal.
According to a further aspect in the invention, provide a kind of proportion magnetic valve Performance Test System, comprise control signal output unit, proportion magnetic valve, proportional solenoid valve control signal supervisory instrument, proportion magnetic valve performance testing device and data collecting instrument, wherein:
Control signal output unit, for generation of with export ratio solenoid control signal;
Proportion magnetic valve, for exporting corresponding solenoid valve signal according to proportional solenoid valve control signal;
Proportional solenoid valve control signal supervisory instrument is the proportional solenoid valve control signal supervisory instrument described in above-mentioned any embodiment;
Proportion magnetic valve performance testing device, for the solenoid valve signal determination magnetic valve performance grade that the tested current signal that exports according to proportional solenoid valve control signal supervisory instrument and proportion magnetic valve export;
Data collecting instrument, for gathering the tested current signal that proportional solenoid valve control signal supervisory instrument exports.
According to a further aspect in the invention, a kind of proportional solenoid valve control signal detecting method is provided, comprises:
Hall detector produces the measurement voltage signal of secondary compensating circuit according to the tested current signal on former limit, and wherein said tested current signal is proportional solenoid valve control signal;
Current determination unit determines described tested current signal according to described measurement voltage signal.
In one embodiment of the invention, according to described measurement voltage signal, current determination unit determines that the step of described tested current signal comprises:
According to described measurement voltage signal and measured resistance value determination secondary offset current;
The tested electric current in former limit is determined according to secondary offset current, the secondary coil number of turn and the primary coil number of turn.
In one embodiment of the invention, the step that hall detector produces the measurement voltage signal of secondary compensating circuit according to the tested current signal on former limit comprises:
Magnet ring former limit measured signal line have tested electric current by time, the first magnetic field that former limit measured signal line produces is gathered on Hall element;
Hall element, when sensing the first magnetic field that magnet ring is assembled, exports Hall voltage;
Amplifying circuit amplifies Hall voltage, and forms secondary offset current on the secondary compensating coil of magnet ring, so that secondary offset current produces the second magnetic field by multicircuit winding on magnet ring, to compensate the first magnetic field;
Secondary offset current when first magnetic field is equaled the second magnetic field by measuring resistance is converted to measurement voltage signal, and exports to current determination unit.
Magnetic balance principle is applied to the collection of proportion magnetic valve signal by the present invention in conjunction with Hall effect, measured signal is obtained by offset current, any change of measured signal can sharp being detected, therefore electric current and the voltage that can measure random waveform comprise pulse waveform, therefore this pick-up unit stable performance, the linearity is good, and precision is high, and measurement range is wide.
Description of the invention provides in order to example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is in order to principle of the present invention and practical application are better described, and enables those of ordinary skill in the art understand the present invention thus design the various embodiments with various amendment being suitable for special-purpose.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of a proportional solenoid valve control signal supervisory instrument of the present invention embodiment.
Fig. 2 is the schematic diagram of hall detector in one embodiment of the invention.
Fig. 3 is the schematic diagram of hall detector in another embodiment of the present invention.
Fig. 4 is the schematic diagram of current determination unit in one embodiment of the invention.
Fig. 5 is the schematic diagram of another embodiment of proportional solenoid valve control signal supervisory instrument of the present invention.
Fig. 6 is the schematic diagram of mounting protection device in one embodiment of the invention.
Fig. 7 is the schematic diagram of the another embodiment of proportional solenoid valve control signal supervisory instrument of the present invention.
Fig. 8 is the schematic diagram of anti-interference equipment in one embodiment of the invention.
Fig. 9 is the schematic diagram of the another embodiment of proportional solenoid valve control signal supervisory instrument of the present invention.
Figure 10 is the schematic diagram of output interface in one embodiment of the invention.
Figure 11 is the schematic diagram of a proportion magnetic valve Performance Test System of the present invention embodiment.
Figure 12 is the schematic diagram of a proportional solenoid valve control signal detecting method of the present invention embodiment.
Figure 13 is the schematic flow sheet of hall detector determination measurement voltage signal in one embodiment of the invention.
Figure 14 is the schematic flow sheet that in one embodiment of the invention, current determination unit determines tested current signal.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the present invention and application or use.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Unless specifically stated otherwise, otherwise positioned opposite, the numerical expression of the parts of setting forth in these embodiments and step and numerical value do not limit the scope of the invention.
Meanwhile, it should be understood that for convenience of description, the size of the various piece shown in accompanying drawing is not draw according to the proportionate relationship of reality.
May not discuss in detail for the known technology of person of ordinary skill in the relevant, method and apparatus, but in the appropriate case, described technology, method and apparatus should be regarded as a part of authorizing instructions.
In all examples with discussing shown here, any occurrence should be construed as merely exemplary, instead of as restriction.Therefore, other example of exemplary embodiment can have different values.
It should be noted that: represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to be further discussed it in accompanying drawing subsequently.
Fig. 1 is the schematic diagram of a proportional solenoid valve control signal supervisory instrument of the present invention embodiment.As shown in Figure 1, described proportional solenoid valve control signal supervisory instrument comprises hall detector 11 and current determination unit 12, wherein:
Hall detector 11, for producing the measurement voltage signal of secondary compensating circuit according to the tested current signal on former limit, wherein said tested current signal is proportional solenoid valve control signal, and secondary offset current is converted to measurement voltage signal by the measuring resistance of secondary compensating circuit, so that gather; And proportion magnetic valve is the commercial unit by Electromagnetic Control, be used in industrial control system adjust medium direction, flow, speed and other parameter, solenoid valve can coordinate different circuit to realize the control of expection, signal in solenoid valve is main with current signal and PWM (Pulse-WidthModulation, width modulation) signal; PWM utilizes the numeral of microprocessor to export the very effective technology of one controlled mimic channel.
Current determination unit 12, for determining described tested current signal according to described measurement voltage signal.
Based on the proportional solenoid valve control signal supervisory instrument that the above embodiment of the present invention provides, magnetic balance principle is applied to the collection of proportion magnetic valve signal in conjunction with Hall effect, measured signal is obtained by offset current, any change of measured signal can sharp being detected, therefore electric current and the voltage that can measure random waveform comprise pulse waveform, therefore this pick-up unit stable performance, and the linearity is good, precision is high, and measurement range is wide; Adopt magnetic balance principle, circuit-under-test and secondary compensating circuit have good electrical separation, affect circuit-under-test hardly; Unbalance to again balancing from magnetic field, less than 1 μ s on required time theory, therefore bandwidth is very wide; Employing magnetic balance type hall detector is contactless, without wearing and tearing, output waveform is clear, non-jitter, nothing are knock-oned, positional repeatability is high.
In one embodiment of the invention, as shown in Figure 2, described hall detector comprises C shape magnet ring, former limit measured signal line, secondary coil, Hall element, amplifying circuit, measuring resistance, wherein:
Former limit measured signal line is through magnet ring, secondary compensating coil is wrapped on magnet ring, Hall element is arranged on magnet ring indentation, there, and the output terminal of Hall element is connected by amplifying circuit one end with secondary compensating coil, and the other end of secondary compensating coil is connected with measuring resistance.
Magnet ring, for have at former limit measured signal line measured current I p by time, the first magnetic field that former limit measured signal line produces is gathered on Hall element.
Hall element, for when sensing the first magnetic field that magnet ring is assembled, exports Hall voltage.Wherein: Hall element be people according to Hall effect, the element made with semiconductor material.Hall element has magnetic-field-sensitive, structure is simple, volume is little, frequency response is wide, output voltage change greatly with the advantage such as long service life; And Hall effect passes to control electric current I, and be the uniform magnetic field of B at the vertical direction applying magnetic induction density of thin slice, then, on the direction perpendicular to electric current and magnetic field, the phenomenon that electric potential difference is the Hall voltage of UH will be produced.
Amplifying circuit, for amplifying Hall voltage, and forms secondary offset current on the secondary compensating coil of magnet ring, so that secondary offset current produces the second magnetic field by multicircuit winding on magnet ring, to compensate the first magnetic field.
Measuring resistance, is converted to measurement voltage signal for secondary offset current when the first magnetic field being equaled the second magnetic field, and exports to current determination unit.
In one embodiment of the invention, as shown in Figure 3, described amplifying circuit can comprise operational amplifier and power amplifier.
In one embodiment of the invention, described hall detector also comprises external power source, and external power source is connected with power amplifier, for power amplifier is powered.
In the above embodiment of the present invention, after Hall element exports Hall voltage, this voltage signal is through operational amplifier power amplification rear drive power amplifier and make its conducting, and external power source can by the secondary compensating coil of the power amplifier of conducting on magnetic core forms secondary offset current Is.Is produces magnetic field by multicircuit winding on magnet ring, and this magnetic field is just in time contrary with the magnetic field that measured signal produces, and thus compensate for the magnetic field that measured signal produces, the output of hall device is reduced gradually.
When magnetic field balances, Is no longer increases, and hall device at this moment plays the effect of instruction Zero flux, now can carry out test I p by Is.When Ip changes, magnetic balance is damaged, and hall device has signal to export, and namely repeats said process and again reaches balance.Any change of measured signal all can destroy this balance.Once magnetic field out of trim, hall device just has signal to export.After operational amplifier power amplification, just corresponding electric current is had to flow through secondary compensating coil to compensate unbalance magnetic field immediately.Unbalance to again balancing from magnetic field, less than 1 μ s on required time theory, this is the process of a mobile equilibrium, so any change of measured signal, can display in offset current Is, wherein magnetic balance is for measured signal is forming total mmf through the magnetic field that produces, magnet ring place during circular magnetic core with the magnetic field produced by a secondary compensating coil electric current, and total mmf is relatively stable constant within the specific limits; Mmf for electric current flow through conductor produce the force of magnetic flux, be used to the one amount of measuring magnetic field or electromagnetic field, be similar to the electromotive force in electric field or voltage, it is described to the force that coil can produce magnetic flux, can weigh or predict the actual force that can excite magnetic flux of hot-wire coil with it.
In one embodiment of the invention, described external power source is outside bipolarity power supply.
Proportion magnetic valve signal flow has two kinds: unidirectional and two-way.Measured signal flow direction is different, and the magnetic direction that measured signal wire produces is contrary, is assembled and sense that the signal polarity that hall device produces is also contrary by magnet ring.Add bipolar power supply; when can guarantee that signal polarity that hall device produces is contrary; Hall element will export an opposite polarity voltage signal; still can driving power pipe make its conducting after operational amplifier power amplification; secondary compensating coil is formed offset current Is, carries out normal signals collecting.
When the bipolarity power supply mode provided by the above embodiment of the present invention can ensure that measured signal polarity carries out any switching, can detect that the conversion of signal also collects the value of measured signal accurately accurately; The polarity of measured signal can be considered in use, and connect easy, easy to use.
In one embodiment of the invention, as shown in Figure 4, described current determination unit comprises offset current determination module 121 and tested electric current determination module 122, wherein:
Offset current determination module 121, for according to described measurement voltage signal and measured resistance value determination secondary offset current.
The physical quantity of magnetic balance type hall detector collection is secondary offset current Is; But harvester be generally gather be voltage signal, according to this situation, in secondary equalizing network, increase measuring resistance RM, collection signal be converted to magnitude of voltage.For the actual value obtaining measured signal can calculate as follows:
Secondary offset current Is=measurement voltage signal ÷ RM.
Tested electric current determination module 122, for determining the tested electric current in former limit according to secondary offset current, the secondary coil number of turn and the primary coil number of turn.
When the magnetic field that the tested electric current in former limit and secondary offset current produce reaches balance in magnetic core, namely there is following equation:
N×Ip＝n×Is(1)
In formula (1): Ip is the tested electric current in former limit; N is the number of turn of primary coil; Is is secondary offset current; N is the number of turn of secondary coil.
Found out by above formula, when the former limit of known hall detector and the secondary coil number of turn, by measuring the size of secondary offset current Is, namely by formula
Ip＝(n/N)×Is
Extrapolate the value of primary current Ip, thus achieve the isolation measurement of the tested electric current in former limit.
In one embodiment of the invention, described former limit measured signal line is arranged on the center of C shape magnetic ring inner hole, can obtain higher signal quality thus.
Fig. 5 is the schematic diagram of another embodiment of proportional solenoid valve control signal supervisory instrument of the present invention.Compared with embodiment illustrated in fig. 1, in the embodiment shown in fig. 5, described device also comprises mounting protection device 13, wherein:
Mounting protection device 13, for fixedly mounting described hall detector.
In one embodiment of the invention, described mounting protection device adopts aluminum alloy material.Noiseless to the signal of magnetic balance type Hall inspection detecting device, protection and shielding can be increased simultaneously.
In one embodiment of the invention, as shown in Figure 6, described mounting protection device comprises first area (a-quadrant), second area (B region), wherein:
First area, for fixedly mounting described former limit measured signal line.Determine that a-quadrant is the installation site (i.e. the center of C shape magnetic ring inner hole) of measured signal cable through test of many times; for preventing the damage of tested cable from installing rubber protecting jacket in a-quadrant, the wire diameter difference of different measured signal cables can well be adapted to simultaneously.
Second area reserve certain space convenient install fixing, by arranging nut or band in the 3rd region (C region) punching with fixing described hall detector and mounting protection device.
By the above embodiment of the present invention, even if ensure that tested cable also can be fixed on the endoporus center position of device in the vibration of complete machine occasion or component test occasion solenoid valve operationally tested cable; And described mounting protection device sound construction, volume is little, lightweight, and the life-span is long, easy for installation, vibration resistance, is not afraid of pollution or the corrosion of dust, greasy dirt, steam and salt fog etc.
Fig. 7 is the schematic diagram of the another embodiment of proportional solenoid valve control signal supervisory instrument of the present invention.Compared with embodiment illustrated in fig. 5, in the embodiment shown in fig. 7, described device also comprises anti-interference equipment 14, wherein:
As shown in Figure 8, described anti-interference equipment 14 comprise resistance and electric capacity composition resistance-capacitance network, described anti-interference equipment one end is connected with the negative pole of hall detector measuring voltage output terminal, the other end be connected in analog.
The above embodiment of the present invention, the impact of large common-mode signal can be eliminated by resistance-capacitance network (RC network), and to input common-mode signal carry out HF reject, thus avoid high frequency common-mode signals coupling cause common-mode rejection ratio reduce affect input signal measurement; The succinct dependable performance of RC network parameter matching form in anti-interference equipment, low price is easy to realize, thus has effectively cut down external interference, and the quality that promotion signal gathers improves detection efficiency.
Fig. 9 is the schematic diagram of the another embodiment of proportional solenoid valve control signal supervisory instrument of the present invention.Compared with embodiment illustrated in fig. 7, in the embodiment shown in fig. 9, described device also comprises output interface 15, wherein:
Described output interface 15 is connected with current determination unit 12, for outwards exporting described tested current signal.
In one embodiment of the invention, as shown in Figure 10, adopt D-SUB9 adapter as output interface.
The stitch definition of D-SUB9 joint is as shown in table 1.
Table 1
| Sequence number | Stitch title | Stitch defines |
| 1 | 1 | Power supply just |
| 2 | 2 | Signal just |
| 3 | 7 | Power- |
| 4 | 8 | Signal is born |
The above embodiment of the present invention selects D-SUB9 adapter, and cost is low, highly versatile.
Figure 11 is the schematic diagram of a proportion magnetic valve Performance Test System of the present invention embodiment.As shown in figure 11, described proportion magnetic valve Performance Test System comprises control signal output unit 101, proportion magnetic valve 102, proportional solenoid valve control signal supervisory instrument 103, proportion magnetic valve performance testing device 104 and data collecting instrument 105, wherein:
Control signal output unit 101, for generation of with export ratio solenoid control signal.
Proportion magnetic valve 102, for exporting corresponding solenoid valve signal according to proportional solenoid valve control signal.
Proportional solenoid valve control signal supervisory instrument 103 is the proportional solenoid valve control signal supervisory instruments described in above-mentioned any embodiment.
Proportion magnetic valve performance testing device 104, for the solenoid valve signal determination magnetic valve performance grade that the tested current signal that exports according to proportional solenoid valve control signal supervisory instrument and proportion magnetic valve export.
Data collecting instrument 105, for gathering the tested current signal that proportional solenoid valve control signal supervisory instrument exports.
Based on the proportion magnetic valve Performance Test System that the above embodiment of the present invention provides, can the control signal of accurate measurement scale solenoid valve, thus can conveniently determine magnetic valve performance grade, and then be the performance study of proportion magnetic valve element own and lifting, it provides strong help to the impact of real system to grasp proportion magnetic valve performance in systems in practice and measurement.
Figure 12 is the schematic diagram of a proportional solenoid valve control signal detecting method of the present invention embodiment.Preferably, the present embodiment can be performed by the proportional solenoid valve control signal supervisory instrument in Fig. 1 to Figure 10 described in any embodiment.The method comprises the following steps:
Step 201, hall detector produces the measurement voltage signal of secondary compensating circuit according to the tested current signal on former limit, wherein said tested current signal is proportional solenoid valve control signal, and secondary offset current is converted to measurement voltage signal by the measuring resistance of secondary compensating circuit, so that gather.
Step 202, current determination unit determines described tested current signal according to described measurement voltage signal.
Based on the proportional solenoid valve control signal detecting method that the above embodiment of the present invention provides, magnetic balance principle is applied to the collection of proportion magnetic valve signal in conjunction with Hall effect, measured signal is obtained by offset current, any change of measured signal can sharp being detected, therefore electric current and the voltage that can measure random waveform comprise pulse waveform, therefore this pick-up unit stable performance, and the linearity is good, precision is high, and measurement range is wide; Adopt magnetic balance principle, circuit-under-test and secondary compensating circuit have good electrical separation, affect circuit-under-test hardly; Unbalance to again balancing from magnetic field, less than 1 μ s on required time theory, therefore bandwidth is very wide; Employing magnetic balance type hall detector is contactless, without wearing and tearing, output waveform is clear, non-jitter, nothing are knock-oned, positional repeatability is high.
In one embodiment of the invention, as shown in figure 13, the step 201 in embodiment described in Figure 12 can comprise:
Step 301, magnet ring former limit measured signal line have tested electric current by time, the first magnetic field that former limit measured signal line produces is gathered on Hall element.
Step 302, Hall element, when sensing the first magnetic field that magnet ring is assembled, exports Hall voltage.
Step 303, amplifying circuit amplifies Hall voltage, and forms secondary offset current on the secondary compensating coil of magnet ring, so that secondary offset current produces the second magnetic field by multicircuit winding on magnet ring, to compensate the first magnetic field.
Step 304, secondary offset current when the first magnetic field is equaled the second magnetic field by measuring resistance is converted to measurement voltage signal, and exports to current determination unit.
In one embodiment of the invention, as shown in figure 14, the step 202 in embodiment described in Figure 12 can comprise:
Step 401, according to described measurement voltage signal and measured resistance value determination secondary offset current.
Step 402, determines the tested electric current in former limit according to secondary offset current, the secondary coil number of turn and the primary coil number of turn.
At current determination unit 12 described above, the functional units such as offset current determination module 121 and tested electric current determination module 122 can be implemented as the general processor for performing function described by the application, programmable logic controller (PLC) (PLC), digital signal processor (DSP), special IC (ASIC), field programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components or it is appropriately combined arbitrarily.
By implementing the present invention, following beneficial effect can be obtained:
1, magnetic balance principle is applied to the collection of proportion magnetic valve signal by the present invention in conjunction with Hall effect, measured signal is obtained by offset current, any change of measured signal can sharp being detected, therefore electric current and the voltage that can measure random waveform comprise pulse waveform, therefore this detection system stable performance, the linearity is good, and precision is high, measurement range.
2, the present invention adopts magnetic balance principle, and circuit-under-test and secondary compensating circuit have good electrical separation, affect circuit-under-test hardly; Unbalance to again balancing from magnetic field, less than 1 μ s on required time theory, therefore bandwidth is very wide.
3, magnetic balance type hall detector of the present invention is contactless, without wearing and tearing, output waveform is clear, non-jitter, nothing are knock-oned, positional repeatability is also high.
4, pick-up unit of the present invention adopts bipolarity to power, and can consider the polarity of measured signal in use, connect easy, easy to use.
5, mounting protection device of the present invention, sound construction, volume is little, lightweight, and the life-span is long, easy for installation, vibration resistance, is not afraid of pollution or the corrosion of dust, greasy dirt, steam and salt fog etc.
6, in anti-interference equipment of the present invention, RC network parameter matching is suitable, the succinct dependable performance of form, and low price is easy to realize, and effectively cuts down external interference, and the quality that promotion signal gathers improves detection efficiency.
7, employing D-SUB9 of the present invention adapter is as output interface, and cost is low, highly versatile.
So far, the present invention is described in detail.In order to avoid covering design of the present invention, details more known in the field are not described.Those skilled in the art, according to description above, can understand how to implement technical scheme disclosed herein completely.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can have been come by hardware, the hardware that also can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be ROM (read-only memory), disk or CD etc.
Claims (12)
1. a proportional solenoid valve control signal supervisory instrument, is characterized in that, comprises hall detector and current determination unit, wherein:
Hall detector, for producing the measurement voltage signal of secondary compensating circuit according to the tested current signal on former limit, wherein said tested current signal is proportional solenoid valve control signal;
Current determination unit, for determining described tested current signal according to described measurement voltage signal.
2. device according to claim 1, is characterized in that, described current determination unit comprises offset current determination module and tested electric current determination module, wherein:
Offset current determination module, for according to described measurement voltage signal and measured resistance value determination secondary offset current;
Tested electric current determination module, for determining the tested electric current in former limit according to secondary offset current, the secondary coil number of turn and the primary coil number of turn.
3. device according to claim 1, is characterized in that, described hall detector comprises C shape magnet ring, former limit measured signal line, secondary coil, Hall element, amplifying circuit, measuring resistance, wherein:
Magnet ring, for have at former limit measured signal line tested electric current by time, the first magnetic field that former limit measured signal line produces is gathered on Hall element;
Hall element, for when sensing the first magnetic field that magnet ring is assembled, exports Hall voltage;
Amplifying circuit, for amplifying Hall voltage, and forms secondary offset current on the secondary compensating coil of magnet ring, so that secondary offset current produces the second magnetic field by multicircuit winding on magnet ring, to compensate the first magnetic field;
Measuring resistance, is converted to measurement voltage signal for secondary offset current when the first magnetic field being equaled the second magnetic field, and exports to current determination unit.
4. device according to claim 3, is characterized in that, described former limit measured signal line is arranged on the center of C shape magnetic ring inner hole.
5. device according to claim 4, is characterized in that, also comprises mounting protection device, wherein:
Mounting protection device, for fixedly mounting described hall detector.
6. device according to claim 5, is characterized in that, described mounting protection device adopts aluminum alloy material.
7. device according to claim 1, it is characterized in that, also comprise anti-interference equipment, described anti-interference equipment comprises the resistance-capacitance network of resistance and electric capacity composition, described anti-interference equipment one end is connected with the negative pole of hall detector measuring voltage output terminal, the other end be connected in analog.
8. device according to claim 1, is characterized in that, also comprises output interface, and described output interface is connected with current determination unit, for outwards exporting described tested current signal.
9. a proportion magnetic valve Performance Test System, is characterized in that, comprises control signal output unit, proportion magnetic valve, proportional solenoid valve control signal supervisory instrument, proportion magnetic valve performance testing device and data collecting instrument, wherein:
Control signal output unit, for generation of with export ratio solenoid control signal;
Proportion magnetic valve, for exporting corresponding solenoid valve signal according to proportional solenoid valve control signal;
Proportional solenoid valve control signal supervisory instrument is the proportional solenoid valve control signal supervisory instrument described in any one of claim 1-8;
Proportion magnetic valve performance testing device, for the solenoid valve signal determination magnetic valve performance grade that the tested current signal that exports according to proportional solenoid valve control signal supervisory instrument and proportion magnetic valve export;
Data collecting instrument, for gathering the tested current signal that proportional solenoid valve control signal supervisory instrument exports.
10. a proportional solenoid valve control signal detecting method, is characterized in that, comprising:
Hall detector produces the measurement voltage signal of secondary compensating circuit according to the tested current signal on former limit, and wherein said tested current signal is proportional solenoid valve control signal;
Current determination unit determines described tested current signal according to described measurement voltage signal.
11. methods according to claim 10, is characterized in that, according to described measurement voltage signal, current determination unit determines that the step of described tested current signal comprises:
According to described measurement voltage signal and measured resistance value determination secondary offset current;
The tested electric current in former limit is determined according to secondary offset current, the secondary coil number of turn and the primary coil number of turn.
12. methods according to claim 10, is characterized in that, the step that hall detector produces the measurement voltage signal of secondary compensating circuit according to the tested current signal on former limit comprises:
Magnet ring former limit measured signal line have tested electric current by time, the first magnetic field that former limit measured signal line produces is gathered on Hall element;
Hall element, when sensing the first magnetic field that magnet ring is assembled, exports Hall voltage;
Amplifying circuit amplifies Hall voltage, and forms secondary offset current on the secondary compensating coil of magnet ring, so that secondary offset current produces the second magnetic field by multicircuit winding on magnet ring, to compensate the first magnetic field;
Secondary offset current when first magnetic field is equaled the second magnetic field by measuring resistance is converted to measurement voltage signal, and exports to current determination unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410532895.3A CN105203824A (en) | 2014-10-11 | 2014-10-11 | Proportional solenoid valve control signal detection method and apparatus, and performance test system |
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| CN201410532895.3A CN105203824A (en) | 2014-10-11 | 2014-10-11 | Proportional solenoid valve control signal detection method and apparatus, and performance test system |
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