CN105807122A - Noise suppression method used in micro-electro-mechanical product current acquisition process - Google Patents
Noise suppression method used in micro-electro-mechanical product current acquisition process Download PDFInfo
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- CN105807122A CN105807122A CN201610302090.9A CN201610302090A CN105807122A CN 105807122 A CN105807122 A CN 105807122A CN 201610302090 A CN201610302090 A CN 201610302090A CN 105807122 A CN105807122 A CN 105807122A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0046—Arrangements for measuring currents or voltages or for indicating presence or sign thereof characterised by a specific application or detail not covered by any other subgroup of G01R19/00
- G01R19/0053—Noise discrimination; Analog sampling; Measuring transients
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Abstract
The invention relates to the technical field of micro-electro-mechanical product measurement and provides a noise suppression method used in the micro-electro-mechanical product current acquisition process.The method includes the steps that according to a control instruction of a main control board, information communication is built between a data acquisition card and a current acquisition card, and signal synchronization is operated between the data acquisition card and the current acquisition card; when current acquisition instruction information of the data acquisition card is received, the current state of an information communication channel is set to be a silent state; when the information communication channel is in the silent state, the data acquisition card controls a current acquisition moment of the current acquisition card according to a state control signal, and the current acquisition card acquires current data at the current acquisition moment and denoise the current data; the denoised current data is sent to the main control board, so that the current acquisition moment is accurately controlled through the state control signal, and synchronous moment of the current acquisition card and the data acquisition card is improved.Besides, interference in the current acquisition process is avoided, and accuracy of the acquired current data is improved.
Description
Technical field
The invention belongs to micro electronmechanical product field of measuring technique, particularly relate to the noise suppressing method in a kind of micro electronmechanical product current collection process.
Background technology
In the measurement process of micro electronmechanical product, it is necessary to the current value of test product, wherein, the collection of electric current is completed by special current acquisition card, and the read-write of product is realized by special data collecting card.
In measurement process, the electric current of micro electronmechanical product is generally fainter, and current acquisition is stuck in gatherer process, it is easy to be subject to the interference of extraneous various noise, make the current value that current acquisition card collects relatively big with actual current value deviation, thus further affecting the result that micro electronmechanical product is measured.
Summary of the invention
It is an object of the invention to provide the noise suppressing method in a kind of micro electronmechanical product current collection process, aim to solve the problem that in prior art, the electric current of micro electronmechanical product is generally fainter, current acquisition is stuck in gatherer process, it is easily subject to the interference of extraneous various noise, makes the problem that current value that current acquisition card collects is bigger with actual current value deviation.
The present invention is achieved in that the noise suppressing method in a kind of micro electronmechanical product current collection process, and described method comprises the steps:
Control instruction according to master control borad, sets up message communicating between data collecting card and current acquisition card and operation signal synchronizes；
When described current acquisition card receives the current acquisition instruction message that described data collecting card sends, the state of current message communication port is set to silent status；
When message communicating passage is in silent status, described data collecting card controls described current acquisition card by state control signal and gathers the moment of electric current, described current acquisition is stuck in the current acquisition moment and current data is acquired, and current data is carried out denoising, wherein, after current acquisition completes, the state of message communicating passage is set to non-silence state；
Current data after denoising is sent to described master control borad by message communicating passage.
As a kind of improved plan, the described control instruction according to master control borad, the step setting up message communicating and operation signal synchronization between data collecting card and current acquisition card specifically includes following step:
Control instruction according to master control borad, described data collecting card sends current range message and range switching synchronizing signal to described current acquisition card；
Described current acquisition card resolves described current range message, it is thus achieved that current current range；
According to the current current range obtained, carry out current range switching, and send, to described data collecting card, the synchronizing signal that current acquisition is ready to complete.
As a kind of improved plan, also comprise the steps: after the described step sending the synchronizing signal that current acquisition is ready to complete to described data collecting card
When described data acquisition was stuck in the default time, do not receive described current acquisition card send current acquisition be ready to complete synchronizing signal time, described data collecting card again to described current acquisition card send current range message and range switching synchronizing signal.
As a kind of improved plan, described data collecting card also comprises the steps: again after the step of described current acquisition card transmission current range message and range switching synchronizing signal
Resend current range message and range switching synchronizing signal to described current acquisition card when described data collecting card after, when not receiving the synchronizing signal that the current acquisition that described current acquisition card sends is ready to complete yet, then control to carry out alarm prompt.
As a kind of improved plan, the step that described data collecting card controls, by state control signal, the moment that described current acquisition card gathers electric current specifically includes following step:
Start the control to micro electronmechanical product to operate；
Gathered the moment of electric current by current acquisition card described in state control signal real-time informing, when the moment gathering electric current arrives, described current acquisition card carries out the collection of current data.
As a kind of improved plan, when the moment gathering electric current arrives, described method also comprises the steps:
The current acquisition action of described current acquisition card is carried out delays time to control, controls to remove current break spike.
As a kind of improved plan, described method also comprises the steps:
Performance according to current break, pre-sets the time delay acquisition time of current acquisition card.
As a kind of improved plan, the described step that current data carries out denoising specifically includes following step:
The current data collected is removed the operation made an uproar at the end；
Current data after being made an uproar in the removal end is filtered processing, and the current data after Filtering Processing is changed, and is converted to described control and blocks discernible current data.
As a kind of improved plan, after the described step that current data is carried out denoising, also comprise the steps: before the described step that current data after denoising is sent to described master control borad
Judge whether current message communication port is in silent status；
When current message communication port is in silent status, then continue waiting for, and return continuation judgement；
When current message communication port is not in silent status, perform the described step that current data after noise suppressed process is sent to described master control borad.
In embodiments of the present invention, the control instruction according to master control borad, sets up message communicating between data collecting card and current acquisition card and operation signal synchronizes；When current acquisition card receives the current acquisition instruction message of data collecting card, the state of current message communication port is set to silent status；Data collecting card controls current acquisition card by state control signal and gathers the moment of electric current, current acquisition is stuck in the current acquisition moment and current data is acquired, and current data is carried out denoising, wherein, after current acquisition completes, the state of message communicating passage is set to non-silence state；Current data after denoising is sent to master control borad by message communicating passage, thus realizing communication information transmission control instruction and data, accurately controlled to gather the moment of electric current by state control signal, improve the synchronization point of current acquisition card and data collecting card, and avoid outside noise and the interference to current collection process of the message communicating passage, improve the accuracy of the current data that current acquisition card collects.
Accompanying drawing explanation
Fig. 1 is the flowchart of the noise suppressing method in micro electronmechanical product current collection process provided by the invention；
Fig. 2 is the control instruction according to master control borad provided by the invention, and that sets up signal synchronization between data collecting card and current acquisition card implements flow chart.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
Fig. 1 illustrates the flowchart of the noise suppressing method in micro electronmechanical product current collection process provided by the invention, and it specifically includes following step:
In step S101, the control instruction according to master control borad, sets up message communicating between data collecting card and current acquisition card and operation signal synchronizes.
In this step, master control borad makes the detection control core of whole micro electronmechanical product, and it, for sending the control instruction of data acquisition to data acquisition, does not repeat them here.
In step s 102, when described current acquisition card receives the current acquisition instruction message that described data collecting card sends, the state of current message communication port is set to silent status.
Wherein, after synchronously completing between data collecting card and current acquisition card, data collecting card sends current acquisition instruction message to current acquisition card, and meanwhile, micro electronmechanical product is also written and read operation by data collecting card, does not repeat them here.
In this step, this message communicating passage is the data transmission state of communication line, and this communication line includes but not limited to CAN and Ethernet etc., does not repeat them here.
This purpose that message communicating passage is set to silent status is the noise jamming for avoiding message communicating tunneling traffic to bring to current acquisition, simultaneously, current acquisition card also stops corresponding data transfer activity, data are avoided to be transferred to the noise jamming that current acquisition brings, wherein, current acquisition card controls message communicating passage by state control signal and enters silent status, namely informs that in test process, other plate or equipment are in silent status.
In step s 103, when message communicating passage is in silent status, data collecting card controls described current acquisition card by state control signal and gathers the moment of electric current, and current acquisition is stuck in the current acquisition moment and current data is acquired, and current data is carried out denoising.
In this step, the step that data collecting card controls, by state control signal, the moment that described current acquisition card gathers electric current specifically includes following step:
(1) start the control to micro electronmechanical product to operate；
(2) gathered the moment of electric current by current acquisition card described in state control signal real-time informing, when the moment gathering electric current arrives, current acquisition card carries out the collection of current data.
Wherein, after current acquisition completes, the state of message communicating passage is set to non-silence state, it is ensured that the duty of other plate or equipment in test process.
In step S104, the current data after denoising is sent to master control borad by message communicating passage.
In embodiments of the present invention, in current collection process, data syn-chronization is carried out in advance between current acquisition card and data collecting card, simultaneously, by the confirmation judgement of the silent status of message communicating passage and the denoising to current data, guarantee current acquisition card and data collecting card simultaneously operating, also make the current data collected more smooth simultaneously, be more nearly actual current data.
As in figure 2 it is shown, above-mentioned steps S101, the control instruction according to master control borad, the step setting up message communicating and operation signal synchronization between data collecting card and current acquisition card specifically includes following step:
In step s 201, the control instruction according to master control borad, data collecting card sends current range message and range switching synchronizing signal to current acquisition card.
In step S202, current acquisition card resolves current range message, it is thus achieved that current current range.
In step S203, according to the current current range obtained, carry out current range switching, and send, to described data collecting card, the synchronizing signal that current acquisition is ready to complete.
In step S204, within the default time, it may be judged whether receive the synchronizing signal that the current acquisition of described current acquisition card transmission is ready to complete, if then terminating, otherwise perform step S205.
Wherein, this time preset can be configured according to actual test request, for instance 1 second, does not repeat them here.
In step S205, when described data acquisition is stuck in the default time, do not receive described current acquisition card send current acquisition be ready to complete synchronizing signal time, data collecting card again to described current acquisition card send current range message and range switching synchronizing signal.
In step S206, after described data collecting card resends current range message and range switching synchronizing signal to described current acquisition card, again judge whether to receive the synchronizing signal that the current acquisition of described current acquisition card transmission is ready to complete, if then terminating, otherwise perform step S207.
In step S207, do not receive yet described current acquisition card send current acquisition be ready to complete synchronizing signal time, then control carry out alarm prompt.
Wherein, the mode of this alarm prompt can have multiple, for instance voice message or display reminding etc., does not repeat them here.
In embodiments of the present invention, realize the data syn-chronization between current acquisition card and data collecting card by the way, it is ensured that the synchronization between data collecting card and current acquisition card, be greatly improved the synchronicity between data collecting card and current acquisition card.
In embodiments of the present invention, when the moment gathering electric current arrives, described method also comprises the steps:
The current acquisition action of current acquisition card is carried out delays time to control, controls to remove current break spike；
That is: the characteristic according to current break, when the moment gathering electric current arrives, after can controlling time delay certain time, then carries out current acquisition, to remove current break spike, it is to avoid the impact that current acquisition is brought by current break, wherein:
Performance according to current break, pre-sets the time delay acquisition time of current acquisition card, for instance 10ms, does not repeat them here.
In embodiments of the present invention, in above-mentioned steps S103, the step that current data carries out denoising specifically includes following step:
(1) current data collected is removed the operation made an uproar at the end；
Wherein, the current data that current acquisition card collects itself is relatively fainter, and is easily subject to various interference, and therefore, the process made an uproar at the bottom of this removal is to be made an uproar in the test equipment end inherently and is removed, and reaches to improve further the clean effect of current acquisition；
(2) current data after being made an uproar in the removal end is filtered processing, and the current data after Filtering Processing is changed, and is converted to described control and blocks discernible current data；
Wherein, this Filtering Processing is common removes maximin, the mode then averaged, naturally it is also possible to adopt other modes, do not repeat them here.
In embodiments of the present invention, after step S103, also comprise the steps: before step S104
(1) judge whether current message communication port is in silent status；
(2) when current message communication port is in silent status, then continue waiting for, and return continuation judgement；
(3) when current message communication port is not in silent status, the described step that current data after noise suppressed process is sent to described master control borad is performed.
That is: when current acquisition card collects current data, also need to before current data is sent to master control borad perform to judge whether message communicating passage is in the judgement of silent status, improve the effect of noise removal process further.
In embodiments of the present invention, the control instruction according to master control borad, sets up message communicating between data collecting card and current acquisition card and operation signal synchronizes；When current acquisition card receives the current acquisition instruction message of data collecting card, the state of current message communication port is set to silent status；Data collecting card controls current acquisition card by state control signal and gathers the moment of electric current, current acquisition is stuck in the current acquisition moment and current data is acquired, and current data is carried out denoising, wherein, after current acquisition completes, the state of message communicating passage is set to non-silence state；Current data after denoising is sent to master control borad by message communicating passage, thus realizing communication information transmission control instruction and data, accurately controlled to gather the moment of electric current by state control signal, improve the synchronization point of current acquisition card and data collecting card, and avoid outside noise and the interference to current collection process of the message communicating passage, improve the accuracy of the current data that current acquisition card collects.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent replacement and improvement etc. made within the spirit and principles in the present invention, should be included within protection scope of the present invention.
Claims (9)
1. the noise suppressing method in a micro electronmechanical product current collection process, it is characterised in that described method comprises the steps:
Control instruction according to master control borad, sets up message communicating between data collecting card and current acquisition card and operation signal synchronizes；
When described current acquisition card receives the current acquisition instruction message that described data collecting card sends, the state of current message communication port is set to silent status；
When message communicating passage is in silent status, described data collecting card controls described current acquisition card by state control signal and gathers the moment of electric current, described current acquisition is stuck in the current acquisition moment and current data is acquired, and current data is carried out denoising, wherein, after current acquisition completes, the state of message communicating passage is set to non-silence state；
Current data after denoising is sent to described master control borad by message communicating passage.
2. the noise suppressing method in micro electronmechanical product current collection process according to claim 1, it is characterized in that, the described control instruction according to master control borad, the step setting up message communicating and operation signal synchronization between data collecting card and current acquisition card specifically includes following step:
Control instruction according to master control borad, described data collecting card sends current range message and range switching synchronizing signal to described current acquisition card；
Described current acquisition card resolves described current range message, it is thus achieved that current current range；
According to the current current range obtained, carry out current range switching, and send, to described data collecting card, the synchronizing signal that current acquisition is ready to complete.
3. the noise suppressing method in micro electronmechanical product current collection process according to claim 2, it is characterised in that also comprise the steps: after the described step sending the synchronizing signal that current acquisition is ready to complete to described data collecting card
When described data acquisition was stuck in the default time, do not receive described current acquisition card send current acquisition be ready to complete synchronizing signal time, described data collecting card again to described current acquisition card send current range message and range switching synchronizing signal.
4. the noise suppressing method in micro electronmechanical product current collection process according to claim 3, it is characterized in that, described data collecting card also comprises the steps: again after the step of described current acquisition card transmission current range message and range switching synchronizing signal
Resend current range message and range switching synchronizing signal to described current acquisition card when described data collecting card after, when not receiving the synchronizing signal that the current acquisition that described current acquisition card sends is ready to complete yet, then control to carry out alarm prompt.
5. the noise suppressing method in micro electronmechanical product current collection process according to claim 1, it is characterised in that the step that described data collecting card controls, by state control signal, the moment that described current acquisition card gathers electric current specifically includes following step:
Start the control to micro electronmechanical product to operate；
Gathered the moment of electric current by current acquisition card described in state control signal real-time informing, when the moment gathering electric current arrives, described current acquisition card carries out the collection of current data.
6. the noise suppressing method in micro electronmechanical product current collection process according to claim 5, it is characterised in that when the moment gathering electric current arrives, described method also comprises the steps:
The current acquisition action of described current acquisition card is carried out delays time to control, controls to remove current break spike.
7. the noise suppressing method in micro electronmechanical product current collection process according to claim 6, it is characterised in that described method also comprises the steps:
Performance according to current break, pre-sets the time delay acquisition time of current acquisition card.
8. the noise suppressing method in micro electronmechanical product current collection process according to claim 1, it is characterised in that the described step that current data carries out denoising specifically includes following step:
The current data collected is removed the operation made an uproar at the end；
Current data after being made an uproar in the removal end is filtered processing, and the current data after Filtering Processing is changed, and is converted to described control and blocks discernible current data.
9. the noise suppressing method in micro electronmechanical product current collection process according to claim 1, it is characterized in that, after the described step that current data is carried out denoising, also comprise the steps: before the described step that current data after denoising is sent to described master control borad
Judge whether current message communication port is in silent status；
When current message communication port is in silent status, then continue waiting for, and return continuation judgement；
When current message communication port is not in silent status, perform the described step that current data after noise suppressed process is sent to described master control borad.
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