CN105425048A - Device and method capable of sampling and detecting multipath impedance - Google Patents

Device and method capable of sampling and detecting multipath impedance Download PDF

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Publication number
CN105425048A
CN105425048A CN201510747218.8A CN201510747218A CN105425048A CN 105425048 A CN105425048 A CN 105425048A CN 201510747218 A CN201510747218 A CN 201510747218A CN 105425048 A CN105425048 A CN 105425048A
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module
voltage
current
tested
sampling
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CN105425048B (en
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徐梦银
胡磊
肖家波
朱亚凡
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Wuhan Jingce Electronic Technology Co Ltd
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Wuhan Jingce Electronic Technology Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/08Measuring resistance by measuring both voltage and current

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

The invention relates to the technical field of electronic equipment voltage testing, and specifically relates to a device and method capable of sampling and detecting multipath impedance. The device comprises a current detection module, a voltage detection module, an impedance calculation module, and a detection result output module. The current detection module and the voltage detection module receive a power signal of a to-be-detected power supply, and carry out the sampling and detection of the current and voltage of the to-be-detected power supply. The impedance calculation module solves an impedance value according to the detected current and voltage data, generates R-T curve data along with detected time, and outputs the data to the detection result output module. The detection result output module enables the R-T curve data to be converted into signal output which can be processed by a display terminal. The interior of the device is provided with a plurality of detection modules, and the detection modules can be used for detecting a plurality of power signals of the to-be-detected power supply at the same time. Through the selection of power-on, power-off and normal detection types, the device can detect the mean value of each power signal, also can detect the peak and valley values, and plots an impedance-time (R-T) curve graph through the impedance values at all moments.

Description

The device and method of sampling Yu detecting can be carried out to multichannel impedance
Technical field
The present invention relates to the voltage tester technical field of electronic equipment, be specifically related to a kind ofly to carry out the device and method of sampling Yu detecting to multichannel impedance.
Background technology
Various different operating voltage can be needed in many sophisticated electronicses normally to work to make this equipment at present simultaneously, in order to ensure the work of these electronic equipment energy normal table, whether normally need to monitor its each working impedance simultaneously.And existingly in the market comprise the instrument of the monitoring voltage of multimeter or multiple tested impedance cannot be monitored simultaneously, or cannot long-time continuous detect.In addition, circumstance complication, the interference of many electronic device works are large, and existing detecting instrument is difficult to reliably working in such a case.
For this reason, in order to meet the work requirements of these electronic equipments, need a kind of energy simultaneously and continuous detecting multichannel impedance signal, and the checkout equipment worked under the environment large at complex jamming that can be reliable and stable.
Summary of the invention
For solving the problems of the technologies described above, what work under the invention provides the reliable and stable environment large at complex jamming of a kind of energy can carry out the device and method of sampling Yu detecting to multichannel impedance.
The present invention is a kind of can carry out the device of sampling Yu detecting to multichannel impedance, and its technical scheme is: comprise impedance computation module, testing result output module, with power supply to be measured multiple power supply signal output terminal multiple current detection module, multiple voltage detection module of connecting respectively with multiple current detection module one to one;
Described current detection module comprises tested Current amplifier attenuation module, A/D current sample module and current calculation module, and described A/D current sample module comprises current sample module and current value A/D modular converter;
Described voltage detection module comprises tested voltage amplification attenuation module, A/D voltage sample module and voltage computing module, and described A/D voltage sample module comprises voltage sample module and magnitude of voltage A/D modular converter;
Described tested Current amplifier attenuation module receives the power supply signal that power supply to be measured exports, A/D current sample module is exported to by after the current signal decay in power supply signal or amplification, described A/D current sample module is sampled to tested electric current and A/D changes, and export sampled current value, tested time and synchronous control signal to current calculation module, described current calculation module according to the sampled current value received, tested time and synchronous control signal output current value and tested time to impedance computation module;
Described tested voltage amplification attenuation module receives the power supply signal that power supply to be measured exports, A/D voltage sample module is exported to by after the voltage signal decay in power supply signal or amplification, described A/D voltage sample module is sampled to tested voltage and A/D changes, and export sample voltage value, tested time and synchronous control signal to voltage computing module, described voltage computing module according to the sample voltage value received, tested time and synchronous control signal output voltage values and tested time to impedance computation module;
Described impedance computation module calculates the impedance of power supply to be measured according to the current value received and magnitude of voltage, and generate R-T curve data, described testing result output module receives the R-T curve data of impedance computation module input, converts the accessible signal of display terminal to and exports.
Further, described current detection module also comprises
Current detecting selector switch module: for arranging type of detection, and control signal to tested Current amplifier attenuation module and electric current identification module according to type of detection output selection;
Electric current identification module: described A/D current sample module comprises peak A/D current sample module, normal A/D current sample module, valley A/D current sample module, described electric current identification module is for receiving the tested electric current selecting control signal and tested Current amplifier attenuation module to export, according to selection control signal and tested current amplitude, tested electric current correspondence is input in the unit of A/D current sample module, and to current calculation module input switch-over control signal.
Further, described peak A/D current sample module comprises the sampling of peak point current forward and oppositely samples and A/D converting unit with A/D converting unit and peak point current, and described peak point current forward sampling and A/D converting unit are oppositely sampled to peak point current and exported synchronous control signal with A/D converting unit;
Described normal A/D current sample module comprises the sampling of normal current forward and oppositely samples and A/D converting unit with A/D converting unit and normal current, and described normal current forward sampling and A/D converting unit are oppositely sampled to normal current and exported synchronous control signal with A/D converting unit;
Described valley A/D current sample module comprises the sampling of valley point current forward and oppositely samples and A/D converting unit with A/D converting unit and valley point current, and described valley point current forward sampling and A/D converting unit are oppositely sampled to valley point current and exported synchronous control signal with A/D converting unit.
Further, described voltage detection module also comprises
Voltage detecting selector switch module: for arranging type of detection, and control signal to tested voltage amplification attenuation module and voltage identification module according to type of detection output selection;
Voltage identification module: described A/D voltage sample module comprises overshoot A/D voltage sample module, normal A/D voltage sample module, ultralow A/D voltage sample module, described voltage identification module is for receiving the tested voltage selecting control signal and tested voltage amplification attenuation module to export, according to selection control signal and tested voltage magnitude, tested voltage correspondence is input in the unit of A/D voltage sample module, and to voltage computing module input switch-over control signal.
Further, described overshoot A/D voltage sample module comprises the sampling of overshoot voltage forward and oppositely samples and A/D converting unit with A/D converting unit and overshoot voltage, and described overshoot voltage forward sampling and A/D converting unit are oppositely sampled to overshoot voltage and exported synchronous control signal with A/D converting unit;
Described normal A/D voltage sample module comprises the sampling of normal voltage forward and oppositely samples and A/D converting unit with A/D converting unit and normal voltage, and described normal voltage forward sampling and A/D converting unit are oppositely sampled to normal voltage and exported synchronous control signal with A/D converting unit;
Described ultralow A/D voltage sample module comprises the sampling of extra low voltage forward and oppositely samples and A/D converting unit with A/D converting unit and extra low voltage, and described extra low voltage forward sampling and A/D converting unit are oppositely sampled to extra low voltage and exported synchronous control signal with A/D converting unit.
Further, each measure loop of described power supply to be measured is all connected to ground by a ground loop module.
Further, be all connected with anti-mistake between the input end of each described current detection module and ground and hit module, for by power supply signal sparking or spike signal import the earth.
Further, be provided with anti-tampering earthing module between adjacent described current detection module, described anti-tampering earthing module one end is connected to each other, other end ground connection, for current detection module electromagnetic screen.
The present invention is a kind of can carry out the method for sampling Yu detecting to multichannel impedance, and its technical scheme comprises the following steps:
S1: power supply output multi-channel power supply signal to be measured is to current detection module and voltage detection module;
S2: tested Current amplifier attenuation module receives the power supply signal that power supply to be measured exports, exports A/D current sample module to by after the current signal decay in power supply signal or amplification; Tested voltage amplification attenuation module receives the power supply signal that power supply to be measured exports, and exports A/D voltage sample module to by after the voltage signal decay in power supply signal or amplification;
S3:A/D current sample module is sampled to tested electric current and A/D changes, and exports sampled current value, tested time and synchronous control signal to current calculation module; A/D voltage sample module is sampled to tested voltage and A/D changes, and exports sample voltage value, tested time and synchronous control signal to voltage computing module;
S4: current calculation module generates current value according to the sampled current value received, tested time and synchronous control signal, and by current value and tested time input impedance computing module; Voltage computing module according to the sample voltage value received, tested time and synchronous control signal formation voltage value, and by magnitude of voltage and tested time input impedance computing module;
S5: impedance computation module calculates impedance according to the current value received, magnitude of voltage, generates R-T curve data according to impedance and tested time, and exports these data to testing result output module;
S6: R-T curve data is converted into the accessible signal of display terminal and exports by testing result output module.
Further, described current detection module power on by current detecting selector switch model choice, power down, normality type of detection;
When selecting normality to detect, current detecting selector switch module exports normality and selects to control signal to tested Current amplifier attenuation module, described tested Current amplifier attenuation module exports electric current identification module to by tested Current amplifier or after decaying to electric current that applicable subsequent module normally works, electric current to be measured is exported to normal A/D current sample module or peak A/D current sample module by described electric current identification module, and detects switch-over control signal to current calculation module input normality;
When select power on, detection of power loss time, current detecting selector switch module exports power or power-down and selects to control signal to tested Current amplifier attenuation module, described tested Current amplifier attenuation module exports electric current identification module to after amplifying separately separately several times electric current, electric current to be measured is exported to normal A/D current sample module or valley A/D current sample module by described electric current identification module, and to current calculation module input power on, detection of power loss switch-over control signal.
Further, described voltage detection module power on by voltage detecting selector switch model choice, power down, normality type of detection;
When selecting normality to detect, voltage detecting selector switch module exports normality and selects to control signal to tested voltage amplification attenuation module, described tested voltage amplification attenuation module exports voltage identification module to by tested voltage amplification or after decaying to voltage that applicable subsequent module normally works, voltage to be measured is exported to normal A/D voltage sample module or overshoot A/D voltage sample module by described voltage identification module, and detects switch-over control signal to voltage computing module input normality;
When select power on, detection of power loss time, voltage detecting selector switch module exports power or power-down and selects to control signal to tested voltage amplification attenuation module, described tested voltage amplification attenuation module exports voltage identification module to after amplifying separately separately several times voltage, voltage to be measured is exported to normal A/D voltage sample module or ultralow A/D voltage sample module by described voltage identification module, and to voltage computing module input power on, detection of power loss switch-over control signal.
Further, described current detection module carries out forward sampling and A/D conversion process to electric current and oppositely samples and A/D conversion process, the current value of described current calculation module output be to both result averaged after current value;
Described voltage detection module is carried out forward sampling and A/D conversion process to voltage and is oppositely sampled and A/D conversion process, the magnitude of voltage of described voltage computing module output be to both result averaged after magnitude of voltage.
Beneficial effect of the present invention: inside arranges multiple current detection module and voltage detection module, can detect multiple power supply signals of power supply to be measured simultaneously; Between each detection module, electromagnetic screen is set, each power supply signal to be measured influencing each other in testing process can be avoided; By sparking or spike undesired signal importing the earth on power supply signal to be measured, can avoid being subject to external environment condition and disturb the detection mistake caused; Carry out forward sampling simultaneously and oppositely sample, the metrical error that internal components drift characteristic causes can be avoided; Simple to operate, without the need to other utility appliance, long-time continuously tested voltage signal can be detected, be convenient to use on a large scale in factory; By select power on, power down, normality type of detection, electric current and voltage are sent into different modules process according to the type of detection selected and electric current, voltage magnitude, the average of every road current signal, voltage signal can not only be detected, electric current, voltage peak and valley can also be detected, and be depicted as impedance-time (R-T) curve map according to magnitude of voltage and current value.
Accompanying drawing explanation
Fig. 1 is model calling figure of the present invention;
Fig. 2 is the inner connection layout of current detection module of the present invention;
Fig. 3 is the inner connection layout of voltage detection module of the present invention;
Fig. 4 is the inner connection layout of impedance computation module of the present invention;
Embodiment
Below in conjunction with accompanying drawing and example, the invention will be further described, and obvious described example is only a part of example of the present invention, instead of whole examples, so described example should not be construed as limitation of the present invention.
As shown in Figure 1, the present invention includes current detection module 1, voltage detection module 8, ground loop module 2, anti-tampering earthing module 3, anti-mistake hit module 4, the earth earthing module 5, testing result output module 6 and impedance computation module 9.Power supply to be measured is any direct supply, such as TV set power, comprises multiple output terminal, every road output terminal is all connected with load blocks, such as a televisor.Each current detection module 1 is parallel to the two ends of each load blocks respectively, passes through electric current for what detect each load blocks.And after voltage detection module 8 is series at current detection module separately, for detecting the voltage that power supply to be measured exports.
The earth earthing module 5 is for will electrically be connected with the earth ground of reality, and it is a spherical metallic conductor, buries beneath, makes electrically signal really become earth potential.Ground loop module 2 is connected between each output terminal of power supply to be measured and the earth earthing module 5, makes each detection module work in independently electric loop.Its similar low-pass filter, can avoid on the one hand that the ground bullet signal that electrically formed because of interference is counter to be poured in current detection module 1, guarantee that impedance ground, earth potential are unchanged on the other hand, be not subject to power source change to be measured and cause current detection module 1 job insecurity.Anti-tampering earthing module 3 is metallic conductor plane, be enclosed between each current detection module 1, and it is in parallel between them, its one end is connected to each other, the other end is connected with circuit loop ground, both prevent external disturbance on the impact of each current detection module 1, prevent again the mutual interference between each current detection module 1.When the electromagnetic distu having external disturbance or current detection module 1 self to occur, each anti-tampering earthing module 3 plays electromagnetic shielding action, and its undesired signal can be sent into electrically exclusive PCR.Anti-mistake hit module 4 be connected in parallel on current detection module 1 input end and electrically between, the power supply signal exported for preventing power supply to be measured sparks or spike undesired signal (these signals are as strong jammings such as static discharge, electrical network short pulse, thunders and lightnings) to destruction of the present invention.The anti-mistake of normal condition is hit module 4 and is not worked, and when producing these spike signals, anti-mistake is hit module 4 and can be absorbed rapidly and be imported to electrically, thus protects subsequent conditioning circuit and normally work.Impedance computation module 9 for generating R-T curve data according to the current value received, magnitude of voltage and tested time, and exports these data to testing result output module 6.
Current detection module 1 comprises current detecting selector switch module 101, tested Current amplifier attenuation module 102, electric current identification module 103, A/D current sample modules A, current calculation module 116.A/D current sample modules A comprises peak A/D current sample module, normal A/D current sample module, valley A/D current sample module.Peak A/D current sample module is made up of peak point current forward sampling module 104, forward peak current value A/D modular converter 105, the reverse sampling module 106 of peak point current, inverse peak current value A/D modular converter 107.Normal A/D current sample module is made up of normal current forward sampling module 108, forward normal electrical flow valuve A/D modular converter 109, the reverse sampling module 110 of normal current, oppositely normal electrical flow valuve A/D modular converter 111.Valley A/D current sample module is made up of electric current valley forward sampling module 112, forward current valley A/D modular converter 113, the reverse sampling module 114 of electric current valley, inverse current valley A/D modular converter 115.
Voltage detection module 8 comprises voltage detecting selector switch module 801, tested voltage amplification attenuation module 802, voltage identification module 803, A/D voltage sample module B, voltage computing module 816.A/D voltage sample module B comprises overshoot A/D voltage sample module, normal A/D voltage sample module, ultralow A/D voltage sample module.Overshoot A/D voltage sample module is made up of overshoot voltage forward sampling module 804, forward overshoot voltage value A/D modular converter 805, the reverse sampling module 806 of overshoot voltage, oppositely overshoot voltage value A/D modular converter 807.Normal A/D voltage sample module is made up of normal voltage forward sampling module 808, forward normal voltage value A/D modular converter 809, the reverse sampling module 810 of normal voltage, oppositely normal voltage value A/D modular converter 811.Ultralow A/D voltage sample module is made up of voltage dips forward sampling module 812, forward voltage valley A/D modular converter 813, the reverse sampling module 814 of voltage dips, reverse voltage valley A/D modular converter 815.
Each current detection module 1 and voltage detection module 8 receive the multiple power supplies signal of power supply to be measured separately, carry out respectively sampling and detect the current signal in the power supply signal received separately and voltage signal.Because current detection module 1 is identical with the course of work of voltage detection module 8, only voltage detection module 8 is described here.Before voltage detection module 8 detects, first type of detection is set by voltage detecting selector switch module 801, as the time-series rules that powers on, power-off sequential detection, normal operating conditions detect.Voltage detecting selector switch module 801 produces corresponding selection control signal according to the different type of detection selected, and sends into tested voltage amplification attenuation module 802, voltage identification module 803.Tested voltage amplification attenuation module 802, for detecting voltage swing, normally works to subsequent module and provides the tested voltage of a suitable amplitude.When under normal operating conditions type of detection, the selection control signal received is that normality selects control signal.If tested brownout, is amplified to appropriate voltage value, if too high, decay to appropriate value.When electrifying timing sequence or power-off sequential type of detection, the selection control signal received is that control signal is selected in power or power-down.Because voltage range changes greatly, (arrives normal range saltus step 0) comparatively rapidly, therefore need to operate with more high speed detection, and do independent amplification to each change in voltage among a small circle, thus ensure minimumly to be detected by subsequent module to maximum magnitude of voltage.
Tested voltage amplification attenuation module 802 inputs to voltage identification module 803 to after the tested voltage process of input.Voltage identification module 803 is sampled for being sent in different modules by different magnitudes of voltage.Because the responding range of sampling and the conversion of different amplitude range, precision are different, in order to the change of tested voltage can be captured more accurately, need to be sent in the module of different disposal.When normality voltage type detects, the selection control signal that voltage identification module 803 receives is that normality selects control signal, and tested voltage is sent to normal A/D voltage sample module or overshoot A/D voltage sample module according to voltage magnitude by voltage identification module 803.Powering on, power-off sequential type detection time, the selection control signal that voltage identification module 803 receives is that control signal is selected in power or power-down, because voltage changes to normal voltage by 0, thus send in ultralow A/D voltage sample module or normal A/D voltage sample module according to change in voltage amplitude.When switching output module, by switch-over control signal, voltage identification module 803 informs that voltage computing module 816 is switched to the time of which module and switching, make response correct in time to make voltage computing module 816 pairs of correlation modules.
After the voltage receiving voltage identification module 803 input, A/D voltage sample inside modules is carried out forward sampling and A/D conversion process simultaneously, is oppositely sampled and A/D conversion process.And mathematic interpolation is done to the formed polarity measurement data that mutually size is identical on the contrary, with eliminate because of working environment change (as temperature, humidity change), the drift of internal components operating characteristic and some disturbing factor issuable the measuring error that causes.Concrete operations are described as follows:
If tested voltage is V, it is sent into overshoot voltage forward sampling module 804, the reverse sampling module 806 of overshoot voltage by voltage identification module 803 respectively, overshoot voltage forward sampling module 104 carries out forward at interval of certain hour, and sampling should be carried out, forward overshoot voltage value A/D modular converter 805 then carries out analog to digital conversion and becomes digital bit data, causes forward overshoot voltage value A/D modular converter 805 can export the value of a band error for (V+X) because aforesaid error (being assumed to be X) exists.The reverse sampling module of overshoot voltage 806 and reverse overshoot voltage value A/D modular converter 807 be oppositely sampling and quantification then, and its polarity is negative, then oppositely the same value exporting band error of overshoot voltage value A/D modular converter 807 is (-V+X).Have when voltage computing module 816 calculates two data: ((V+X)-(-V+X))/2=X, thus obtain tested voltage accurately, eliminate measuring error.
When carrying out forward sampling and A/D conversion process, oppositely sampling with A/D conversion process, synchronous for ensureing, overshoot voltage forward sampling module 804 and forward overshoot voltage value A/D modular converter 805 pairs of reverse sampling modules of overshoot voltage 806 and reverse overshoot voltage value A/D modular converter 807 and voltage computing module 816 export synchronous control signal (also sending synchronous control signal in the manner described above between all the other modules in A/D voltage sample module).Current calculation module 116 and voltage computing module 816 receive synchronous control signal, simultaneously the tested current data of synchronized update and tested voltage data, and tested current data, voltage data, tested time are sent into impedance computation module 9.
Impedance computation module 9 calculates impedance according to the current value received, magnitude of voltage, and will calculate gained impedance and the tested time generates R-T curve data, exports these data to testing result output module 6.Impedance computation module 9 comprises tested voltage data receiver module 901, tested current data receiver module 902, impedance computation module 903 and impedance data output module 904.The magnitude of voltage that tested voltage data receiver module 901 inputs for receiver voltage detection module 8 and tested time, the current value that tested current data receiver module 902 inputs for received current detection module 1 and tested time.Impedance computation module 903 calculates impedance according to current value, magnitude of voltage, and will calculate gained impedance and the tested time generates R-T curve data, exports testing result output module 6 to finally by impedance data output module 904.R-T curve data is converted into the accessible signal of display terminal (display screen or PC) and exports by testing result output module 6.
The above, be only the specific embodiment of the present invention, it should be pointed out that any those of ordinary skill in the art are in the technical scope disclosed by the present invention, the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.

Claims (12)

1. can carry out the device of sampling Yu detecting to multichannel impedance, it is characterized in that: comprise impedance computation module (9), testing result output module (6), with power supply to be measured multiple power supply signal output terminal multiple current detection module (1), multiple voltage detection module (8) of connecting respectively with multiple current detection module (1) one to one;
Described current detection module (1) comprises tested Current amplifier attenuation module (102), A/D current sample module (A) and current calculation module (116), and described A/D current sample module (A) comprises current sample module and current value A/D modular converter;
Described voltage detection module (8) comprises tested voltage amplification attenuation module (802), A/D voltage sample module (B) and voltage computing module (816), and described A/D voltage sample module (B) comprises voltage sample module and magnitude of voltage A/D modular converter;
Described tested Current amplifier attenuation module (102) receives the power supply signal that power supply to be measured exports, A/D current sample module (A) is exported to by after the current signal decay in power supply signal or amplification, described A/D current sample module (A) samples to tested electric current and A/D changes, and export sampled current value, tested time and synchronous control signal are to current calculation module (116), described current calculation module (116) is according to the sampled current value received, tested time and synchronous control signal output current value and tested time are to impedance computation module (9),
Described tested voltage amplification attenuation module (802) receives the power supply signal that power supply to be measured exports, A/D voltage sample module (B) is exported to by after the voltage signal decay in power supply signal or amplification, described A/D voltage sample module (B) samples to tested voltage and A/D changes, and export sample voltage value, tested time and synchronous control signal are to voltage computing module (816), described voltage computing module (816) is according to the sample voltage value received, tested time and synchronous control signal output voltage values and tested time are to impedance computation module (9),
Described impedance computation module (9) calculates the impedance of power supply to be measured according to the current value received and magnitude of voltage, and generate R-T curve data, described testing result output module (6) receives the R-T curve data that impedance computation module (9) inputs, and converts the accessible signal of display terminal to and exports.
2. can carry out the device of sampling Yu detecting to multichannel impedance as claimed in claim 1, it is characterized in that: described current detection module (1) also comprises
Current detecting selector switch module (101): for arranging type of detection, and control signal to tested Current amplifier attenuation module (102) and electric current identification module (103) according to type of detection output selection;
Electric current identification module (103): described A/D current sample module comprises peak A/D current sample module, normal A/D current sample module, valley A/D current sample module, described electric current identification module (103) is for receiving the tested electric current selecting control signal and tested Current amplifier attenuation module (102) to export, according to selection control signal and tested current amplitude, tested electric current correspondence is input in the unit of A/D current sample module, and to current calculation module (116) input switch-over control signal.
3. can carry out the device of sampling Yu detecting to multichannel impedance as claimed in claim 2, it is characterized in that: described peak A/D current sample module comprises the sampling of peak point current forward and oppositely samples and A/D converting unit with A/D converting unit and peak point current, described peak point current forward sampling and A/D converting unit are oppositely sampled to peak point current and are exported synchronous control signal with A/D converting unit;
Described normal A/D current sample module comprises the sampling of normal current forward and oppositely samples and A/D converting unit with A/D converting unit and normal current, and described normal current forward sampling and A/D converting unit are oppositely sampled to normal current and exported synchronous control signal with A/D converting unit;
Described valley A/D current sample module comprises the sampling of valley point current forward and oppositely samples and A/D converting unit with A/D converting unit and valley point current, and described valley point current forward sampling and A/D converting unit are oppositely sampled to valley point current and exported synchronous control signal with A/D converting unit.
4. can carry out the device of sampling Yu detecting to multichannel impedance as claimed in claim 1, it is characterized in that: described voltage detection module (8) also comprises
Voltage detecting selector switch module (801): for arranging type of detection, and control signal to tested voltage amplification attenuation module (802) and voltage identification module (803) according to type of detection output selection;
Voltage identification module (803): described A/D voltage sample module comprises overshoot A/D voltage sample module, normal A/D voltage sample module, ultralow A/D voltage sample module, described voltage identification module (803) is for receiving the tested voltage selecting control signal and tested voltage amplification attenuation module (802) to export, according to selection control signal and tested voltage magnitude, tested voltage correspondence is input in the unit of A/D voltage sample module, and to voltage computing module (816) input switch-over control signal.
5. can carry out the device of sampling Yu detecting to multichannel impedance as claimed in claim 4, it is characterized in that: described overshoot A/D voltage sample module comprises the sampling of overshoot voltage forward and oppositely samples and A/D converting unit with A/D converting unit and overshoot voltage, described overshoot voltage forward sampling and A/D converting unit are oppositely sampled to overshoot voltage and are exported synchronous control signal with A/D converting unit;
Described normal A/D voltage sample module comprises the sampling of normal voltage forward and oppositely samples and A/D converting unit with A/D converting unit and normal voltage, and described normal voltage forward sampling and A/D converting unit are oppositely sampled to normal voltage and exported synchronous control signal with A/D converting unit;
Described ultralow A/D voltage sample module comprises the sampling of extra low voltage forward and oppositely samples and A/D converting unit with A/D converting unit and extra low voltage, and described extra low voltage forward sampling and A/D converting unit are oppositely sampled to extra low voltage and exported synchronous control signal with A/D converting unit.
6. can carry out the device of sampling Yu detecting to multichannel impedance as claimed in claim 1, it is characterized in that: each measure loop of described power supply to be measured is all connected to ground by a ground loop module (2).
7. can carry out the device of sampling Yu detecting to multichannel impedance as claimed in claim 1, it is characterized in that: be all connected with anti-mistake between the input end of each described current detection module (1) and ground and hit module (4), for by power supply signal sparking or spike signal import the earth.
8. can carry out the device of sampling Yu detecting to multichannel impedance as claimed in claim 1, it is characterized in that: between adjacent described current detection module (1), be provided with anti-tampering earthing module (3), described anti-tampering earthing module (3) one end is connected to each other, other end ground connection, for current detection module (1) electromagnetic screen.
9. to utilize described in claim 1-8 and can to carry out sampling the method for carrying out with the device detected sampling Yu detecting to multichannel impedance, it is characterized in that, comprise the following steps:
S1: power supply output multi-channel power supply signal to be measured is to current detection module (1) and voltage detection module (8);
S2: tested Current amplifier attenuation module (102) receives the power supply signal that power supply to be measured exports, exports A/D current sample module (A) to by after the current signal decay in power supply signal or amplification; Tested voltage amplification attenuation module (802) receives the power supply signal that power supply to be measured exports, and exports A/D voltage sample module (B) to by after the voltage signal decay in power supply signal or amplification;
S3:A/D current sample module (A) is sampled to tested electric current and A/D changes, and exports sampled current value, tested time and synchronous control signal to current calculation module (116); A/D voltage sample module (B) is sampled to tested voltage and A/D changes, and exports sample voltage value, tested time and synchronous control signal to voltage computing module (816);
S4: current calculation module (116) generates current value according to the sampled current value received, tested time and synchronous control signal, and by current value and tested time input impedance computing module (9); The sample voltage value that voltage computing module (816) basis receives, tested time and synchronous control signal formation voltage value, and by magnitude of voltage and tested time input impedance computing module (9);
S5: impedance computation module (9) calculates impedance according to the current value received, magnitude of voltage, generates R-T curve data according to impedance and tested time, and exports these data to testing result output module (6);
S6: R-T curve data is converted into the accessible signal of display terminal and exports by testing result output module (6).
10. can carry out the method for sampling Yu detecting to multichannel impedance as claimed in claim 9, it is characterized in that: described current detection module (1) is selected to power on by current detecting selector switch module (101), power down, normality type of detection;
When selecting normality to detect, current detecting selector switch module (101) exports normality and selects to control signal to tested Current amplifier attenuation module (102), described tested Current amplifier attenuation module (102) exports electric current identification module (103) to by tested Current amplifier or after decaying to electric current that applicable subsequent module normally works, electric current to be measured is exported to normal A/D current sample module or peak A/D current sample module by described electric current identification module (103), and detects switch-over control signal to current calculation module (116) input normality;
When select power on, detection of power loss time, current detecting selector switch module (101) exports power or power-down and selects to control signal to tested Current amplifier attenuation module (102), described tested Current amplifier attenuation module (102) exports electric current identification module (103) to after amplifying separately separately several times electric current, electric current to be measured is exported to normal A/D current sample module or valley A/D current sample module by described electric current identification module (103), and to current calculation module (116) input power on, detection of power loss switch-over control signal.
11. can carry out the method for sampling Yu detecting to multichannel impedance as claimed in claim 9, it is characterized in that: described voltage detection module (8) is selected to power on by voltage detecting selector switch module (801), power down, normality type of detection;
When selecting normality to detect, voltage detecting selector switch module (801) exports normality and selects to control signal to tested voltage amplification attenuation module (802), described tested voltage amplification attenuation module (802) exports voltage identification module (803) to by tested voltage amplification or after decaying to voltage that applicable subsequent module normally works, voltage to be measured is exported to normal A/D voltage sample module or overshoot A/D voltage sample module by described voltage identification module (803), and detects switch-over control signal to voltage computing module (816) input normality;
When select power on, detection of power loss time, voltage detecting selector switch module (801) exports power or power-down and selects to control signal to tested voltage amplification attenuation module (802), described tested voltage amplification attenuation module (802) exports voltage identification module (803) to after amplifying separately separately several times voltage, voltage to be measured is exported to normal A/D voltage sample module or ultralow A/D voltage sample module by described voltage identification module (803), and to voltage computing module (816) input power on, detection of power loss switch-over control signal.
12. can carry out the method for sampling Yu detecting to multichannel impedance as claimed in claim 9, it is characterized in that: described current detection module (1) carries out forward sampling and A/D conversion process to electric current and oppositely samples and A/D conversion process, the current value that described current calculation module (116) exports be to both result averaged after current value;
Described voltage detection module (8) is carried out forward sampling and A/D conversion process to voltage and is oppositely sampled and A/D conversion process, the magnitude of voltage that described voltage computing module (816) exports be to both result averaged after magnitude of voltage.
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