CN105259407B - It can be to the device and method that Multi-path electricity stream is sampled and is detected - Google Patents
It can be to the device and method that Multi-path electricity stream is sampled and is detected Download PDFInfo
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- CN105259407B CN105259407B CN201510742794.3A CN201510742794A CN105259407B CN 105259407 B CN105259407 B CN 105259407B CN 201510742794 A CN201510742794 A CN 201510742794A CN 105259407 B CN105259407 B CN 105259407B
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Abstract
The present invention relates to the electric current test technology fields of electronic equipment, it can be to the device and method that Multi-path electricity stream is sampled and is detected more particularly to one kind, including testing result output module and with the multiple power supply signal output ends of power supply to be measured multiple current detection modules correspondingly, current detection module includes tested Current amplifier attenuation module, A/D sampling module and current calculation module, sampled current value and tested time generate I-T curve data to current calculation module based on the received, it exports to testing result output module, I-T curve data is converted into the accessible signal of display terminal and exported by testing result output module.The internal multiple current detection modules of setting of the invention, can simultaneously detect multiple current signals of power supply to be measured；It is powered on by selection, power down, normality detection type, the mean value of every road current signal can not only be detected, moreover it is possible to detect current peak, electric current valley, and the current value at each moment is depicted as current-vs-time (I-T) curve graph.
Description
Technical field
The present invention relates to the electric current test technology fields of electronic equipment, and in particular to one kind can sample Multi-path electricity stream
With the device and method of detection.
Background technique
A variety of different operating currents can be needed to come so that the equipment is normal simultaneously in many sophisticated electronics at present
Whether normal work, in order to ensure the work of these electronic equipment energy normal tables, need to monitor its each operating current simultaneously.
And currently on the market the instrument of the existing monitor current including multimeter or multiple tested electric currents can not be monitored simultaneously,
It can not be carried out continuously detection for a long time.In addition, the environment of many electronic device works is complicated, interference is big, and existing detection
Instrument is difficult to reliably working in such a case.
For this purpose, in order to meet the work requirements of these electronic equipments, need a kind of to detect simultaneously and continuously Multi-path electricity
Flow signal, and the detection device to work under the reliable and stable environment big in complex jamming of energy.
Summary of the invention
In order to solve the above technical problems, the present invention provides works under a kind of reliable and stable environment big in complex jamming of energy
That makees can be to the device and method that Multi-path electricity stream is sampled and is detected.
One kind of the present invention can be to the device that Multi-path electricity stream is sampled and is detected, technical solution: including testing result
Output module and with the multiple power supply signal output ends of power supply to be measured multiple current detection modules correspondingly, wherein current detecting
Module includes tested Current amplifier attenuation module, A/D sampling module and current calculation module, and the A/D sampling module includes electricity
Flow sampling module and current value A/D conversion module；
The tested Current amplifier attenuation module receives the power supply signal of power supply output to be measured, by the electric current in power supply signal
To A/D sampling module, the A/D sampling module carries out sampling to tested electric current and converts with A/D for output after signal decaying or amplification,
And exporting sampled current value, tested time and synchronous control signal to current calculation module, the current calculation module is according to connecing
The sampled current value of receipts and tested time generate I-T curve data, and export to testing result output module, the testing result
Received I-T curve data is converted into the accessible signal of display terminal and exported by output module.
Further, the current detection module further includes
Current detecting selects switch module: exporting selection control signal for detection type to be arranged, and according to detection type
To tested Current amplifier attenuation module and electric current identification module；
Electric current identification module: the A/D sampling module includes peak A/D sampling module, normal A/D sampling module, valley
A/D sampling module, the electric current identification module be used for receives selection control signal and tested Current amplifier attenuation module export
Tested electric current correspondence is input to each of A/D sampling module according to selection control signal and tested current amplitude by tested electric current
In unit, and switch-over control signal is inputted to current calculation module.
Further, the peak A/D sampling module includes the sampling of peak point current forward direction and A/D converting unit and peak value electricity
The reversed sampling of stream and A/D converting unit, the peak point current forward direction sampling reversely sample with A/D converting unit to peak point current and
A/D converting unit exports synchronous control signal；
The normal A/D sampling module includes that the sampling of normal current forward direction is reversely adopted with A/D converting unit and normal current
Sample and A/D converting unit, the normal current forward direction sampling is reversely sampled with A/D converting unit to normal current to be converted with A/D
Unit exports synchronous control signal；
The valley A/D sampling module includes that the sampling of valley point current forward direction is reversely adopted with A/D converting unit and valley point current
Sample and A/D converting unit, the valley point current forward direction sampling is reversely sampled with A/D converting unit to valley point current to be converted with A/D
Unit exports synchronous control signal.
Further, each measure loop of power supply to be measured passes through an earth-return circuit module and is connected to ground.
Further, anti-mistake is respectively connected between the input terminal and ground of each current detection module and hits module, be used for
Sparking on power supply signal or spike signal are imported into the earth.
Further, anti-tampering earthing module, the anti-tampering ground connection mould are equipped between the adjacent current detection module
Block one end is connected to each other, other end ground connection, for being electromagnetically shielded to current detection module.
One kind of the present invention can be to the method that Multi-path electricity stream is sampled and is detected, technical solution, comprising the following steps:
S1: power supply output multi-channel power supply signal to be measured to current detection module；
S2: tested Current amplifier attenuation module receives the power supply signal of power supply output to be measured, by the electric current in power supply signal
It exports after signal decaying or amplification to A/D sampling module；
S3:A/D sampling module carries out sampling to tested electric current and converts with A/D, and export sampled current value, the tested time and
Synchronous control signal is to current calculation module；
S4: sampled current value and tested time generate I-T curve data to current calculation module based on the received, and export extremely
Testing result output module；
S5: testing result output module converts the accessible signal of display terminal for I-T curve data and exports.
Further, the current detection module can by current detecting select switch module selection power on, power down, normality
Detection type；
When selecting normality detection, current detecting selection switch module output normality selection control signal to tested electric current is put
Big attenuation module, the tested Current amplifier attenuation module is by tested Current amplifier or decays to suitable subsequent module normal work
Electric current after output to electric current identification module, the electric current identification module electric current to be measured is exported to normal A/D sampling module or
Peak A/D sampling module, and switch-over control signal is detected to current calculation module input normality；
When selection powers on, detection of power loss when, current detecting select switch module output power or power-down selection control signal
To tested Current amplifier attenuation module, the tested Current amplifier attenuation module exports after respectively individually amplifying several times to electric current
To electric current identification module, electric current to be measured is exported to normal A/D sampling module or valley A/D and samples mould by the electric current identification module
Block, and input and power on to current calculation module, detection of power loss switch-over control signal.
Further, the current detection module carries out positive sampling simultaneously to electric current and adopts with A/D conversion process and reversely
Sample and A/D conversion process, the current calculation module sample positive and the value and reversed sampling and A/D after A/D conversion process
As detection gained electric current output after value averaged after conversion process.
Beneficial effects of the present invention: multiple current detection modules are arranged in inside, can be simultaneously to multiple electric currents of power supply to be measured
Signal is detected；Electromagnetic shielding is set between current detection module, is avoided that each tested current signal in the detection process
It influences each other；Sparking on power supply signal or spike interference signal are imported into the earth, are avoided that by external environment
Mistake is detected caused by interference；Positive sampling and reversed sampling are carried out simultaneously, are avoided that caused by internal components drift characteristic
Detection error；It is easy to operate, other ancillary equipments are not necessarily to, continuously tested current signal can be detected for a long time, be convenient for work
Large-scale use in factory；It is powered on by selection, power down, normality detection type, the detection type and current amplitude according to selection will
Electric current inputs peak A/D sampling module, normal A/D sampling module, valley A/D sampling module, can not only detect every road electric current letter
Number mean value, moreover it is possible to detect current peak, electric current valley, and the current value at each moment be depicted as current-vs-time (I-T) song
Line chart.
Detailed description of the invention
Fig. 1 is module connection figure of the present invention；
Fig. 2 is connection figure inside current detection module of the present invention；
In figure: 1-current detection module, 101-current detectings selection switch module, 102-tested Current amplifier decaying
Module, 103-electric current identification modules, 104-peak point current forward direction sampling modules, 105-positive peak current value A/D moduluss of conversion
Block, the reversed sampling module of 106-peak point currents, 107-inverse peak current value A/D conversion modules, 108-normal currents are positive
Sampling module, 109-forward direction normal current value A/D conversion modules, the reversed sampling module of 110-normal currents, 111-it is reversed just
Normal current value A/D conversion module, 112-electric current valley forward direction sampling modules, 113-forward current valley A/D conversion modules,
The reversed sampling module of 114-electric current valleies, 115-reverse current valley A/D conversion modules, 116-current calculation modules, 2-
Earth-return circuit module, 3-anti-tampering earthing modules, 4-anti-mistakes hit module, 5-the earth earthing modules, the output of 6-testing results
Module, 7-load blocks, A-A/D sampling module.
Specific embodiment
The invention will be further described with example with reference to the accompanying drawing, it is clear that the example is only one of the invention
Point example, rather than whole examples, so the example should not be construed as limiting the invention.
As shown in Figure 1, the present invention includes current detection module 1, earth-return circuit module 2, anti-tampering earthing module 3, anti-mistake
Hit module 4, the earth earthing module 5, testing result output module 6, load blocks 7.Power supply to be measured is any DC power supply, such as
TV set power, including multiple output ends are respectively connected with a load blocks, such as television set on every road output end.Each electricity
Stream detection module 1 is parallel to the both ends of each load blocks respectively, passes through electric current for detect each load blocks.
Wherein, for the earth earthing module 5 for will electrically be connected with actual earth ground, it is a spherical metal
Conductor, buries beneath, and electrical earth signal is made really to become ground potential.Earth-return circuit module 2 is connected to each output of power supply to be measured
Between end and the earth earthing module 5, each current detection module 1 is made to work in independent electric loop.It is similar to low-pass filtering
On the one hand device can avoid electrically being poured into current detection module 1 because the ground bullet signal of interference formation is counter, on the other hand ensure to connect
Ground impedance, ground potential are unchanged, are not led to 1 job insecurity of current detection module by tested curent change.It is anti-tampering to connect
Ground module 3 is metallic conductor plane, is enclosed between each current detection module 1, and in parallel between them, and one end is each other
It connects to connection, the other end and circuit loop, has not only prevented influence of the external disturbance to each current detection module 1, but also prevent each
Interfering with each other between a current detection module 1.When the electromagnetic distu for thering is external disturbance or current detection module 1 itself to occur
When, each anti-tampering earthing module 3 plays electromagnetic shielding action, and its interference signal can be sent into electrically exclusive PCR.
Anti- mistake hit module 4 be connected in parallel on current detection module 1 input terminal and electrically between, for preventing moment on tested current signal
Electric discharge or spike interference signal (strong jammings such as these signals such as static discharge, power grid short pulse, thunder and lightning) are to of the invention
It destroys.The anti-mistake of normal condition hits module 4 and does not work, and when generating these spike signals, anti-mistake, which hits module 4, to be absorbed rapidly
And be conducted into electrically, so that subsequent conditioning circuit be protected to work normally.
Current detection module 1 includes current detecting selection switch module 101, tested Current amplifier attenuation module 102, electric current
Identification module 103, A/D sampling module A, current calculation module 116.A/D sampling module A includes peak A/D sampling module, normal
A/D sampling module, valley A/D sampling module.Peak A/D sampling module is by peak point current forward direction sampling module 104, positive peak value
The reversed sampling module 106 of current value A/D conversion module 105, peak point current, 107 structure of inverse peak current value A/D conversion module
At.Normal A/D sampling module is by normal current forward direction sampling module 108, forward direction normal current value A/D conversion module 109, normally
The reversed sampling module 110 of electric current, reversed normal current value A/D conversion module 111 are constituted.Valley A/D sampling module is by electric current paddy
It is worth positive sampling module 112, forward current valley A/D conversion module 113, the reversed sampling module 114 of electric current valley, reverse current
Valley A/D conversion module 115 is constituted.
Each current detection module 1 respectively receives the power supply signal all the way of power supply to be measured, to respective received power supply signal
In current signal sampled and detected respectively.Before current detection module 1 is detected, selected first by current detecting
Detection type is arranged in switch module 101, such as powers on time-series rules, power-off sequential detection, normal operating conditions detection.Current detecting
It selects switch module 101 to generate corresponding selection control signal according to the different detection types of selection, is sent into tested Current amplifier and declines
Subtract module 102, electric current identification module 103.Tested Current amplifier attenuation module 102 gives subsequent module for detecting size of current
It works normally and the tested electric current of an appropriate amplitude is provided.Under normal operating conditions detection type, the selection control that receives
Signal processed is normality selection control signal.It is amplified to appropriate current value if tested electric current is too low, if excessively high decay to suitably
Value.In electrifying timing sequence or power-off sequential detection type, what is received selects control signal to select to control for power or power-down
Signal.Because current range changes greatly, (jumps 0 to normal range (NR)) relatively rapidly, therefore need to operate with higher speed detection, and
Independent amplification is done to each small-scale curent change, to guarantee that minimum can be detected to maximum current value by subsequent module
It arrives.
102 pairs of tested Current amplifier attenuation module is input to electric current identification module 103 after inputting tested current processing.Electric current
Identification module 103 is sampled for being sent into different current values in different modules.Due to the sampling of different amplitude ranges
It is different with the response range of conversion, precision, in order to more accurately capture the variation of tested electric current, needs to be sent to and do not exist together
In the module of reason.In normal state current type detection, what electric current identification module 103 received selects control signal for normality selection
Signal is controlled, tested electric current is sent to normal A/D sampling module or peak A/D according to current amplitude by electric current identification module 103
Sampling module.Power on, power-off sequential type detection when, what electric current identification module 103 received select control signal is powers on
Or power down selection control signal is adopted because electric current is changed by 0 to normal current to be sent into valley A/D according to curent change amplitude
In egf block or normal A/D sampling module.When switching output module, electric current identification module 103 is accused by switch-over control signal
Know that current calculation module 116 is switched to the time of which module and switching, so that current calculation module 116 is to correlation module
Make correctly response in time.
Carried out simultaneously after the electric current for receiving the input of electric current identification module 103, inside A/D sampling module positive sampling with
A/D conversion process, reversed sampling and A/D conversion process.And mutually the identical measurement data of size is done instead to polarity is formed by
Difference calculates, to eliminate because working environment variation (such as temperature, humidity change), internal components working characteristics are drifted about and may
Measurement error caused by the certain disturbing factors generated.Concrete operations are described as follows:
If tested electric current is I, electric current identification module 103 is respectively fed to peak point current forward direction sampling module 104, peak
It is worth the reversed sampling module 106 of electric current, peak point current forward direction sampling module 104 carries out positive sampling once at interval of certain time,
And forward direction peak current value A/D conversion module 105 then carries out analog-to-digital conversion at a number bit data, due to error above-mentioned
(being assumed to be Y), which exists, causes positive peak current value A/D conversion module 105 that can export the value with error as (I+Y).And peak
Being worth the reversed sampling module 106 of electric current and inverse peak current value A/D conversion module 107, then reversely sampling and quantization, polarity are
Negative, then equally value of the output with error of inverse peak current value A/D conversion module 107 is (- I+Y).In current calculation module 116
Have when calculating two data: ((I+Y)-(- I+Y))/2=Y eliminates measurement error to obtain accurately being tested electric current.
When carrying out positive sampling and A/D conversion process, reversed sampling with A/D conversion process, to guarantee synchronization, peak value electricity
The positive sampling module 104 of stream and forward direction peak current value A/D conversion module 105 are to the reversed sampling module of peak point current 106 and instead
Synchronous control signal is exported (in A/D sampling module to peak current value A/D conversion module 107 and current calculation module 116
Synchronous control signal is also sent in the manner described above between remaining module).Current calculation module 116 receives synchronously control letter
Number, synchronized update is tested current data, after the size of tested electric current, tested current measurement time are fabricated to I-T curve data
It is sent into testing result output module 6.Testing result output module 6 by I-T curve data be converted into display terminal (display screen or
PC) accessible signal output.
The above description is merely a specific embodiment, it is noted that anyone skilled in the art exists
Disclosed herein technical scope in, any changes or substitutions that can be easily thought of, should all cover protection scope of the present invention it
It is interior.
Claims (8)
1. one kind can be to the device that Multi-path electricity stream is sampled and is detected, it is characterised in that: including testing result output module (6)
With with the multiple power supply signal output ends of power supply to be measured multiple current detection modules (1) correspondingly, wherein current detection module
It (1) include that tested Current amplifier attenuation module (102), A/D sampling module (A) and current calculation module (116), the A/D are adopted
Egf block (A) includes current sampling module and current value A/D conversion module；
The tested Current amplifier attenuation module (102) receives the power supply signal of power supply output to be measured, by the electricity in power supply signal
Output is to A/D sampling module (A) after flowing signal decaying or amplification, the A/D sampling module (A) to tested electric current carry out sampling with
A/D conversion, and sampled current value, tested time and synchronous control signal are exported to current calculation module (116), the galvanometer
Calculating module (116), sampled current value and tested time generate I-T curve data based on the received, and export to testing result and export
Received I-T curve data is converted into the accessible signal of display terminal by module (6), the testing result output module (6)
Output；
The current detection module (1) includes electric current identification module (103), and the A/D sampling module includes peak A/D sampling mould
Block, normal A/D sampling module, valley A/D sampling module, the electric current identification module (103) is for receiving selection control signal
It, will be by according to selection control signal and tested current amplitude with the tested electric current of tested Current amplifier attenuation module (102) output
It surveys electric current correspondence to be input in each unit of A/D sampling module, and believes to current calculation module (116) input switching control
Number；
After the electric current for receiving electric current identification module (103) input, positive sampling and A/ are carried out inside A/D sampling module simultaneously
D conversion process, reversed sampling and A/D conversion process；And mutually the identical measurement data of size makes the difference instead to polarity is formed by
Value calculates.
2. as described in claim 1 can be to the device that Multi-path electricity stream is sampled and is detected, it is characterised in that: the current detecting
Module (1) further includes
Current detecting selection switch module (101): selection control signal is exported for detection type to be arranged, and according to detection type
To tested Current amplifier attenuation module (102) and electric current identification module (103).
3. as described in claim 1 can be to the device that Multi-path electricity stream is sampled and is detected, it is characterised in that: the peak A/D
Sampling module includes the sampling of peak point current forward direction and A/D converting unit and peak point current reversely samples and A/D converting unit, described
The sampling of peak point current forward direction, which is reversely sampled with A/D converting unit to peak point current, exports synchronous control signal with A/D converting unit；
The normal A/D sampling module include the sampling of normal current forward direction reversely sample with A/D converting unit and normal current and
A/D converting unit, the normal current forward direction sampling reversely sample and A/D converting unit with A/D converting unit to normal current
Export synchronous control signal；
The valley A/D sampling module include the sampling of valley point current forward direction reversely sample with A/D converting unit and valley point current and
A/D converting unit, the valley point current forward direction sampling reversely sample and A/D converting unit with A/D converting unit to valley point current
Export synchronous control signal.
4. as described in claim 1 can be to the device that Multi-path electricity stream is sampled and is detected, it is characterised in that: the power supply to be measured
Each measure loop passes through an earth-return circuit module (2) and is connected to ground.
5. as described in claim 1 can be to the device that Multi-path electricity stream is sampled and is detected, it is characterised in that: each electric current
Be respectively connected with anti-mistake between the input terminal and ground of detection module (1) and hit module (4), for by sparking on power supply signal or
Spike signal imports the earth.
6. as described in claim 1 can be to the device that Multi-path electricity stream is sampled and is detected, it is characterised in that: the adjacent electric current
Anti-tampering earthing module (3) are equipped between detection module (1), described anti-tampering earthing module (3) one end is connected to each other, the other end
Ground connection, for being electromagnetically shielded to current detection module (1).
7. using the device that Multi-path electricity stream is sampled and is detected can be carried out described in any one of claim 1-6 sampling with
The method of detection, which comprises the following steps:
S1: power supply output multi-channel power supply signal to be measured to current detection module (1)；
S2: tested Current amplifier attenuation module (102) receive the power supply signal of power supply output to be measured, by the electric current in power supply signal
It exports after signal decaying or amplification to A/D sampling module (A)；
S3:A/D sampling module (A) carries out sampling to tested electric current and converts with A/D, and export sampled current value, the tested time and
Synchronous control signal is to current calculation module (116)；
S4: sampled current value and tested time generate I-T curve data to current calculation module (116) based on the received, and export
To testing result output module (6)；
S5: testing result output module (6) converts the accessible signal of display terminal for I-T curve data and exports；
The current detection module (1) can by current detecting select switch module (101) selection power on, power down, normality detect
Type；
When selecting normality detection, current detecting selects switch module (101) output normality selection control signal to tested electric current
Amplify attenuation module (102), tested Current amplifier or decay to is suitble to subsequent by the tested Current amplifier attenuation module (102)
To electric current identification module (103), the electric current identification module (103) is defeated by electric current to be measured for output after the electric current that module works normally
Out to normal A/D sampling module or peak A/D sampling module, and to current calculation module (116) input normality detection switching control
Signal processed；
The current detection module (1) carries out positive sampling simultaneously to electric current and converts with A/D conversion process and reversed sampling with A/D
Processing, the current calculation module (116) by positive sampling with after A/D conversion process value and reversed sampling at A/D conversion
As detection gained electric current output after the poor averaged of value after reason.
8. as claimed in claim 7 can be to the method that Multi-path electricity stream is sampled and is detected, it is characterised in that:
When selection powers on, detection of power loss when, current detecting select switch module (101) output power or power-down selection control signal
To tested Current amplifier attenuation module (102), the tested Current amplifier attenuation module (102) is respectively independent several times to electric current
To electric current identification module (103), the electric current identification module (103), which exports electric current to be measured to normal A/D, is adopted for output after amplification
Egf block or valley A/D sampling module, and input and power on to current calculation module (116), detection of power loss switch-over control signal.
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