CN108151638A - Signal processing system, method, apparatus, storage medium and processor - Google Patents
Signal processing system, method, apparatus, storage medium and processor Download PDFInfo
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- CN108151638A CN108151638A CN201711160991.XA CN201711160991A CN108151638A CN 108151638 A CN108151638 A CN 108151638A CN 201711160991 A CN201711160991 A CN 201711160991A CN 108151638 A CN108151638 A CN 108151638A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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Abstract
The invention discloses a kind of signal processing system, method, apparatus, storage medium and processors.The system includes：First signal for obtaining the first signal, and is converted into second signal by signal processing circuit, wherein, the first signal is collected by the probe of at least two eddy current displacement sensors according to pumping signal, and the precision of second signal is higher than the precision of the first signal；Microcontroller is connected with signal processing circuit, for obtaining second signal, and second signal is converted into linear signal.By the present invention, achieve the effect that improve the efficiency of signal processing.
Description
Technical field
The present invention relates to field of signal processing, are situated between in particular to a kind of signal processing system, method, apparatus, storage
Matter and processor.
Background technology
At present, the signal processing circuit of eddy current displacement sensor is added using analog circuit or using analog circuit
Software correction mode, when carrying out signal acquisition to integrated type sensor, it is also desirable to which multichannel can just be met the requirements.
Above-mentioned analog circuit uses multichannel pmultiple amplifier and processing circuit, for example, exciting circuit, amplifying circuit, filtering and inspection
Wave circuit；Above-mentioned analog circuit adds software correction mode cost higher, and is also required to amplification and filter circuit.
The overall volume of the signal processing circuit of eddy current displacement sensor is larger, and component is more, by circuit in itself
It is larger with external interference, the problem of presence signal treatment effeciency is low.
For the problem of signal processing efficiency is low in the prior art, currently no effective solution has been proposed.
Invention content
It is a primary object of the present invention to provide a kind of signal processing system, method, apparatus, storage medium and processor,
At least to solve the problems, such as that signal processing efficiency is low.
To achieve these goals, according to an aspect of the invention, there is provided a kind of signal processing system.The system packet
It includes：First signal for obtaining the first signal, and is converted into second signal by signal processing circuit, wherein, the first signal is by extremely
The probe of few two eddy current displacement sensors is collected according to pumping signal, and the precision of second signal is higher than the first signal
Precision；Microcontroller is connected with signal processing circuit, for obtaining second signal, and second signal is converted into linear signal.
Optionally, signal processing circuit includes：Signal processing chip for acquiring the first signal, and the first signal is turned
Turn to second signal.
Optionally, signal processing circuit further includes：Peripheral control circuits are connected with signal processing chip, for believing
Under the adjustment of number processing chip, the measuring range of eddy current displacement sensor is controlled.
Optionally, signal processing circuit further includes：Source circuit is encouraged, for generating pumping signal；Difference channel, for pair
Difference processing is carried out according to the first signal that pumping signal collects by the probe of at least two eddy current displacement sensors, is obtained
To third signal；Detecting circuit is connected with difference channel, for carrying out detection processing to third signal, obtains fourth signal；
Filtering and amplifying circuit is connected with detecting circuit, for being amplified filtering process to fourth signal, obtains the 5th signal；Number
Word signal processing circuit is connected with filtering and amplifying circuit, for being corrected to the 5th signal, obtains second signal.
Optionally, signal processing circuit further includes：Digital analog converter, for the second signal of digital form to be converted
Second signal for analog form；Voltage follower circuit is connected with digital analog converter, for exporting the of analog form
Voltage signal in binary signal.
To achieve these goals, according to an aspect of the present invention, a kind of signal processing method is additionally provided.This method
Including：The first signal is obtained, wherein, the first signal is adopted by the probe of at least two eddy current displacement sensors according to pumping signal
Collection obtains；First signal is converted into second signal, wherein, the precision of second signal is higher than the precision of the first signal；To monolithic
Machine sends second signal, wherein, second signal is converted into linear signal by microcontroller.
Optionally, before the first signal is obtained, this method further includes：Under the control of microcontroller, pumping signal is generated；
Respectively pumping signal is sent to the probe of at least two eddy current displacement sensors.
Optionally, the first signal is converted into second signal and includes at least one of：By the first signal by resonance
Reason, is converted into second signal；By the filtered processing of the first signal, it is converted into second signal；By the first signal by amplification
Reason, is converted into second signal；Analog signal is passed through into analog-to-digital conversion, obtains digital signal, wherein, the first signal, which includes simulation, to be believed
Number, second signal includes digital signal.
To achieve these goals, according to an aspect of the present invention, a kind of signal processing method is additionally provided.This method
Including：Obtain the second signal that is sent by signal processing circuit, wherein, second signal by signal processing circuit to the first signal into
Row conversion obtains, and the first signal is collected by the probe of at least two eddy current displacement sensors according to pumping signal；By
Binary signal is converted into linear signal.
Optionally, before the second signal sent by signal processing circuit is obtained, this method further includes：At setting signal
The driving source of circuit is managed, so that signal processing circuit generates pumping signal.
Optionally, second signal is converted into linear signal to include：To second signal into line linearity correction, it is converted into linear
Signal.
Optionally, second signal is converted into linear signal to include：Second signal is corrected and difference processing, conversion
For linear signal, wherein, linear signal is exported in target range interior lines property.
Optionally, after second signal is converted into linear signal, this method further includes：Export linear signal.
Optionally, when exporting linear signal, this method further includes：Linear signal is filtered, is filtered
Signal；Export filtering signal.
To achieve these goals, according to an aspect of the present invention, a kind of signal processing apparatus is additionally provided.The device
Including：Acquiring unit, for obtaining the first signal, wherein, the first signal by least two eddy current displacement sensors probe
It is collected according to pumping signal；Conversion unit, for the first signal to be converted into second signal, wherein, the essence of second signal
Degree is higher than the precision of the first signal；Transmitting element, for sending second signal to microcontroller, wherein, second signal is by microcontroller
It is converted into linear signal.
To achieve these goals, according to an aspect of the present invention, a kind of signal processing apparatus is additionally provided.The device
Including：Acquiring unit, for obtaining the second signal sent by signal processing circuit, wherein, second signal is by signal processing electricity
Road is converted to obtain to the first signal, and the first signal is by the probe of at least two eddy current displacement sensors according to pumping signal
It collects；Conversion unit, for second signal to be converted into linear signal.
To achieve these goals, according to an aspect of the present invention, a kind of storage medium is additionally provided.The storage medium
Program including storage, wherein, equipment is performed at the signal of the embodiment of the present invention where controlling storage medium when program is run
Reason method.
To achieve these goals, according to an aspect of the present invention, a kind of processor is additionally provided.The processor is used for
Program is run, wherein, the signal processing method of execution embodiment of the present invention when program is run.
In embodiments of the present invention, the first signal is obtained by signal processing circuit, and the first signal is converted into second
Signal, wherein, the first signal is collected by the probe of at least two eddy current displacement sensors according to pumping signal, the second letter
Number precision be higher than the first signal precision；It is connected by microcontroller with signal processing circuit, for obtaining second signal, and
Second signal is converted into linear signal.Acquire what multiple sensor was popped one's head in simultaneously due to being realized by a signal processing circuit
Signal, and feed back to microcontroller and handled, circuit is small and cost-effective, and the efficiency for solving signal processing low is asked
Topic, and then achieved the effect that improve the efficiency of signal processing.
Description of the drawings
The attached drawing for forming the part of the application is used to provide further understanding of the present invention, schematic reality of the invention
Example and its explanation are applied for explaining the present invention, is not constituted improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is a kind of schematic diagram of signal processing system according to embodiments of the present invention；
Fig. 2 is a kind of flow chart of signal processing method according to embodiments of the present invention；
Fig. 3 is the flow chart of another signal processing method according to embodiments of the present invention；
Fig. 4 is a kind of schematic diagram of signal processing circuit according to embodiments of the present invention；
Fig. 5 is a kind of schematic diagram of the signal processing of microcontroller according to embodiments of the present invention；
Fig. 6 is the schematic diagram of another signal processing circuit according to embodiments of the present invention；
Fig. 7 is a kind of schematic diagram of signal processing apparatus according to embodiments of the present invention；And
Fig. 8 is the schematic diagram of another signal processing apparatus according to embodiments of the present invention.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
In order to which those skilled in the art is made to more fully understand application scheme, below in conjunction in the embodiment of the present application
The technical solution in the embodiment of the present application is clearly and completely described in attached drawing, it is clear that described embodiment is only
The embodiment of the application part, instead of all the embodiments.Based on the embodiment in the application, ordinary skill people
Member's all other embodiments obtained without making creative work should all belong to the model of the application protection
It encloses.
It should be noted that term " first " in the description and claims of this application and above-mentioned attached drawing, "
Two " etc. be the object for distinguishing similar, and specific sequence or precedence are described without being used for.It should be appreciated that it uses in this way
Data can be interchanged in the appropriate case, so as to embodiments herein described herein.In addition, term " comprising " and " tool
Have " and their any deformation, it is intended that cover it is non-exclusive include, for example, containing series of steps or unit
Process, method, system, product or equipment are not necessarily limited to those steps or unit clearly listed, but may include without clear
It is listing to Chu or for the intrinsic other steps of these processes, method, product or equipment or unit.
Embodiment 1
An embodiment of the present invention provides a kind of signal processing systems.
Fig. 1 is a kind of schematic diagram of signal processing system according to embodiments of the present invention.As shown in Figure 1, the system includes：
Signal processing circuit 10 and microcontroller 20.
First signal for obtaining the first signal, and is converted into second signal by signal processing circuit 10, wherein, first
Signal is collected by the probe of at least two eddy current displacement sensors according to pumping signal, and the precision of second signal is higher than the
The precision of one signal.
In this embodiment, front end of the signal processing circuit 10 as signal processing system can connect at least two electricity
The probe of eddy displacement sensor, to obtain the first signal, which can be analog signal, can be high-frequency signal,
It is collected by the probe of at least two eddy current displacement sensors according to pumping signal, for example, at least two current vortex displacements
Sensor is four eddy current displacement sensors, the probes of at least two eddy current displacement sensors be respectively pop one's head in 1, probe 2,
Probe 3 and probe 4, it is achieved thereby that the purpose of multiplexed signal sampling, and the acquisition speed of the probe of eddy current displacement sensor
Degree is high, also higher according to the precision of the first signal that pumping signal collects.
First signal can be converted into second signal by the signal processing circuit 10 of the embodiment, the precision of the second signal
It is higher than the first signal, for example, the analog signal collected by the probe of at least two eddy current displacement sensors is converted
For high-precision digital signal, the AD sampling precisions of the signal processing circuit can reach 28 position digital signals, and sample frequency is every
Road can reach more than 2Ksps, on the basis of it disclosure satisfy that multiplexed signal sampling, and can realize high speed, high-precision signal
Processing.
The pumping signal of the embodiment can be generated by the setting to driving source, to trigger at least two current vortex positions
The probe of displacement sensor acquires the first signal.
Microcontroller 20 is connected with signal processing circuit 10, for obtaining second signal, and second signal is converted into line
Property signal.
The signal processing system of the embodiment further includes microcontroller 20, can be to letter as the rear end of signal processing system
Number processing circuit is controlled.The microcontroller 20 can be STM32 microcontrollers, be connected with signal processing circuit 10.At signal
Reason circuit 10 feeds back second signal to microcontroller 20, and microcontroller 20 reads the second signal, and second signal is converted into line
Property signal, for example, obtaining linear signal into line linearity correction to the second linear signal by software, it is linear finally to export this again
Signal.
The microcontroller 20 of the embodiment can be also used for control signal processing circuit and generate pumping signal, at least two whirlpools
The probe of flow sensor is sent, and is communicated so as to realize with 28 high accuracy datas of signal processing collector.
The embodiment obtains the first signal by signal processing circuit 10, and the first signal is converted into second signal,
In, the first signal is collected by the probe of at least two eddy current displacement sensors according to pumping signal, the essence of second signal
Degree is connected by microcontroller 20 with signal processing circuit 10 higher than the precision of the first signal, acquisition second signal, and by second
Signal is converted into linear signal.Due to realizing the signal for acquiring multiple sensor simultaneously and popping one's head in by a signal processing circuit,
And feed back to microcontroller and handled, circuit is small and cost-effective, so as to solve the problems, such as that the efficiency of signal processing is low,
And then the efficiency of signal processing is achieved the effect that improve.
Optionally, the signal processing circuit of the embodiment includes：Signal processing chip, for acquiring the first signal, and will
First signal is converted into second signal.
The signal processing circuit of the embodiment can include signal processing chip, and the signal processing chip is to inductance coil ratio
It is more sensitive, it can be used primarily on short distance contact button, the application on eddy current displacement sensor is needed to peripheral circuit
It is adjusted, to ensure the requirement of the measuring range of eddy current displacement sensor.Optionally, which is LDC1614,
It can be with acquiring the first signal by the signal acquisition interface of the first signal, for example, being adopted simultaneously by four tunnel signal acquisition interfaces
Collect the first signal, and the first signal is handled, it can be by generating resonance, signal filtering, signal amplification and carrying out AD
The processing modes such as sampling, the AD samplings in the signal processing chip can enable the precision of signal to reach 28 bit digitals letter
Number, sample frequency can reach more than 2Ksps per road, it is achieved thereby that the first signal is converted into the higher second signal of precision
Purpose.
Optionally, the signal processing circuit of the embodiment further includes：Peripheral control circuits are connected with signal processing chip
It connects, under the adjustment of signal processing chip, controlling the measuring range of eddy current displacement sensor.
The signal processing circuit of the embodiment can also include peripheral control circuits, the peripheral control circuits namely periphery electricity
Road is connected with signal processing chip, under the adjustment of signal processing chip, controlling the measurement of eddy current displacement sensor
Range, for example, application of the signal processing chip on eddy current displacement sensor, needs to be adjusted peripheral circuit, just may be used
To meet the requirement of the measuring range of eddy current displacement sensor.
Optionally, the signal processing circuit of the embodiment further includes：Source circuit is encouraged, for generating pumping signal；Difference
Circuit, for being carried out to the probe by least two eddy current displacement sensors according to the first signal that pumping signal collects
Difference processing obtains third signal；Detecting circuit is connected with difference channel, for carrying out detection processing to third signal, obtains
To fourth signal；Filtering and amplifying circuit is connected with detecting circuit, for being amplified filtering process to fourth signal, obtains
5th signal；Digital signal processing circuit is connected with filtering and amplifying circuit, for being corrected to the 5th signal, obtains
Binary signal.
The embodiment can be configured the driving source of signal processing circuit by microcontroller, to generate pumping signal.
The signal processing circuit can include excitation source circuit, may be used under the control of microcontroller, using Digital Signal Processing
(Digital Signal Processing, referred to as DSP) directly generates square-wave signal, so as to generate satisfactory excitation
Signal.The signal processing circuit can also include difference channel, and the difference channel is to the spy by least two eddy current sensors
First signal of head feedback carries out difference processing, obtains third signal, and then the third signal is carried out by detecting circuit again
Detection is handled, and obtains fourth signal, so as to which detection modulated signal is come without distortion.Finally again by filtering and amplifying circuit to the 4th
Signal is amplified filtering process, obtains the 5th signal, enters back into digital signal processing circuit and carries out software school to the 5th signal
Just, for example, to the 5th signal into line linearity correction and error correction, second signal is obtained, it is achieved thereby that signal processing circuit
The first signal got is converted into the purpose of second signal, and then second signal is converted by linear letter by microcontroller
Number, circuit is small and cost-effective, has achieved the effect that improve the efficiency of signal processing.
Optionally, the signal processing circuit of the embodiment further includes：Digital analog converter, for by the of digital form
Binary signal is converted into the second signal of analog form；Voltage follower circuit is connected with digital analog converter, for exporting mould
Voltage signal in the second signal of plan form.
The signal processing circuit of the embodiment can also include digital analog converter (Digital to Analog
Converter, referred to as DAC), second signal can be the second signal of digital form, by digital analog converter by number
The second signal of font formula is converted into the second signal of analog form, achievees the purpose that digital signal is converted into analog signal, so
Pass through the voltage signal in the required analog signal of voltage follower circuit output afterwards.
The embodiment can be handled by dsp software, output linearity measuring range is corrected, to output voltage signal
Be adjusted, the output of linearity measuring range and voltage signal can carry out software processing by DSP, then by DAC and voltage with
Required voltage signal is exported with circuit.Since the voltage signal of output is directly exported by the DAC of DSP,
The voltage signal of output may range from 0-3.3V.
The embodiment on eddy current displacement sensor signal processing temporarily not yet apply, by signal processing circuit with
The mode that microcontroller is simply combined can either meet the acquisition of the signal of multichannel eddy current displacement sensor, and can realize height
Fast, high-precision signal processing, signal processing circuit it is small, it is cost-effective, reached the efficiency for improving signal processing
Effect.
Embodiment 2
The embodiment of the present invention additionally provides a kind of signal processing method described from signal processing circuit side.It needs to illustrate
, the signal processing method of the embodiment can perform by the signal processing system of the embodiment of the present invention.
Fig. 2 is a kind of flow chart of signal processing method according to embodiments of the present invention.As shown in Fig. 2, this method includes
Following steps：
Step S202 obtains the first signal.
In the technical solution provided in above-mentioned steps S202 of the present invention, the first signal is obtained, wherein, the first signal is by least
The probe of two eddy current displacement sensors is collected according to pumping signal.
In this embodiment, the first signal is acquired by the probe of at least two eddy current displacement sensors according to pumping signal
It obtains, can be analog signal, can be high-frequency signal, for example, probe of first signal by four eddy current displacement sensors
It is collected according to pumping signal, obtains first signal, it is achieved thereby that the purpose of multiplexed signal sampling, wherein, excitation letter
Number signal processing circuit can be controlled to generate by microcontroller, for example, excitation of the microcontroller to signal processing circuit can be passed through
Source is configured to generate, and the first signal is acquired to trigger the probe of at least two eddy current displacement sensors.In addition, due to this
The picking rate of the probe of the eddy current displacement sensor of embodiment is high, the essence of the first signal collected according to pumping signal
Degree is also higher, so as to achieve the effect that improve signal acquisition precision.
First signal is converted into second signal by step S204.
In the technical solution provided in above-mentioned steps S204 of the present invention, the first signal is converted into second signal, wherein, the
The precision of binary signal is higher than the precision of the first signal.
After the first signal is obtained, the first signal is converted into second signal, the precision of the second signal is higher than
Analog signal for example, when the first signal is analog signal, can be converted high-precision digital signal by one signal.The AD is adopted
Sample precision can reach 28 position digital signals, and sample frequency can reach more than 2Ksps per road, disclosure satisfy that multiple signals adopt
On the basis of collection, and it can realize high speed, high-precision signal processing.
Step S206 sends second signal to microcontroller, wherein, second signal is converted into linear signal by microcontroller.
In the technical solution provided in above-mentioned steps S206 of the present invention, second signal is sent to microcontroller, wherein, the second letter
Number linear signal is converted by microcontroller.
After the first signal is converted into second signal, to microcontroller send second signal, that is, by second signal to
Singlechip feedbsck handles the first signal by microcontroller, the first signal is converted into linear signal.Optionally, the first letter
It number is corrected by microcontroller and difference processing, enables also may be used inside certain range linear convergent rate, microcontroller
To carry out software filtering to second signal.
The embodiment by obtaining the first signal, wherein, the first signal by least two eddy current displacement sensors spy
Head is collected according to pumping signal；First signal is converted into second signal, wherein, the precision of second signal is higher than the first letter
Number precision；Second signal is sent to microcontroller, wherein, second signal is converted to linear signal by microcontroller, due to adopting simultaneously
Collect the signal of multiple sensor probe, and feed back to microcontroller and handled, circuit is small and cost-effective, solves signal
The problem of efficiency of processing is low, and then achieved the effect that improve the efficiency of signal processing.
As an alternative embodiment, in step S202, before obtaining the first signal, this method further includes：In list
Under the control of piece machine, pumping signal is generated；Respectively pumping signal is sent to the probe of at least two eddy current displacement sensors.
In this embodiment, the first signal is acquired by the probe of at least two eddy current displacement sensors according to pumping signal
It obtains, before the first signal is obtained, generates pumping signal, pumping signal can be generated under the control of microcontroller, for example,
By single chip circuit, driving source setting is carried out to signal processing circuit, satisfactory excitation is added for signal processing circuit
Signal.After pumping signal is generated, pumping signal is sent to the probe of at least two eddy current displacement sensors respectively, to touch
The probe for sending out at least two eddy current displacement sensors acquires the first signal, and then obtain first signal, and the first signal is turned
Second signal is turned to, second signal is sent to microcontroller, to be converted to linear signal by microcontroller, improves the effect of signal processing
Rate.
As an alternative embodiment, step S204, by the first signal be converted into second signal include it is following at least
One of：First signal by resonance is handled, is converted into second signal；By the filtered processing of the first signal, it is converted into second
Signal；By the first signal by enhanced processing, it is converted into second signal；By analog signal by analog-to-digital conversion, digital letter is obtained
Number, wherein, the first signal includes analog signal, and second signal includes digital signal.
In this embodiment, when the first signal is converted into second signal, the first signal by resonance is handled, is generated
Resonance, so as to which the first signal is converted into second signal；First signal can be filtered, the first signal is converted
For second signal；The first signal can be converted into second signal to the first signal by enhanced processing；Simulation can be believed
Number by analog-to-digital conversion, digital signal is obtained, then using the signal after the above-mentioned conversion of the microcontroller of rear end, and carries out software line
Property correction, finally export linear signal, the AD sampling precisions of the embodiment can reach 28 position digital signals, and sample frequency is per road
More than 2Ksps can be reached, on the basis of it disclosure satisfy that multiplexed signal sampling, and can be realized at a high speed, at high-precision signal
Reason.
The embodiment of the present invention additionally provides a kind of signal processing method described from microcontroller side.It should be noted that
The signal processing method of the embodiment can also be performed by the signal processing system of the embodiment of the present invention.
Fig. 3 is the flow chart of another signal processing method according to embodiments of the present invention.As shown in figure 3, this method packet
Include following steps：
Step S302 obtains the second signal sent by signal processing circuit.
In the technical solution provided in above-mentioned steps S302 of the present invention, the second letter sent by signal processing circuit is obtained
Number, wherein, second signal is converted to obtain by signal processing circuit to the first signal, and the first signal is by least two current vortexs
The probe of displacement sensor is collected according to pumping signal.
In this embodiment, the first signal is acquired by the probe of at least two eddy current displacement sensors according to pumping signal
It obtains, can be analog signal, for example, the first signal is acquired by the probe of four eddy current displacement sensors according to pumping signal
It obtains.Second signal is converted to obtain by signal processing circuit to the first signal, for example, when the first signal is analog signal
When, analog signal can be converted to high-precision digital signal, which can reach 28 position digital signals, sampling frequency
Shuai Mei roads can reach more than 2Ksps, on the basis of it disclosure satisfy that multiplexed signal sampling, and can realize at a high speed, it is high-precision
Signal processing.The second signal that microcontroller acquisition is sent by signal processing circuit.
Second signal is converted into linear signal by step S304.
In the technical solution provided in above-mentioned steps S304 of the present invention, second signal is converted into linear signal.
After the second signal sent by signal processing circuit is obtained, the linear school of software can be carried out to the first signal
Just, the linear signal is finally exported.
The embodiment is by obtaining the second signal sent by signal processing circuit, and the second signal is by signal processing circuit
First signal is converted to obtain, the first signal is adopted by the probe of at least two eddy current displacement sensors according to pumping signal
Collection obtains；Second signal is converted into linear signal.Due to acquiring multiple sensor probe simultaneously by signal processing circuit
Signal, and obtained and handled by microcontroller, circuit is small and cost-effective, and so as to solve, the efficiency of signal processing is low to ask
Topic, and then achieved the effect that improve the efficiency of signal processing.
As an alternative embodiment, in step S302, obtain the second signal that is sent by signal processing circuit it
Before, this method further includes：The driving source of setting signal processing circuit, so that signal processing circuit generates pumping signal.
In this embodiment, pumping signal, that is, probe pumping signal, obtain sent by signal processing circuit the
Before binary signal, microcontroller can also setting signal processing circuit driving source, control signal processing circuit generate it is satisfactory
Pumping signal acquires the first signal to trigger the probe of at least two eddy current displacement sensors.
As an alternative embodiment, step S304, is converted into linear signal by second signal and includes：Believe second
Number into line linearity correction, it is converted into linear signal.
In this embodiment, when second signal is converted into linear signal, can to second signal into line linearity correction,
For example, microcontroller reads second signal, software linearity correction is carried out to the second signal, so as to which second signal be converted into linearly
Signal.
As an alternative embodiment, step S304, is converted into linear signal by second signal and includes：Believe second
It number is corrected and difference processing, is converted into linear signal, wherein, linear signal is exported in target range interior lines property.
In this embodiment, when second signal is converted into linear signal, second signal can be corrected and poor
Office is managed, and enables to carry out the signal of linear convergent rate inside certain range linear convergent rate, microcontroller
Software filtering.
As an alternative embodiment, in step S304, after second signal is converted into linear signal, this method
It further includes：Export linear signal.
In this embodiment, after second signal is converted into linear signal, microcontroller output linear signal.
As an alternative embodiment, when exporting linear signal, microcontroller is filtered linear signal,
Obtain filtering signal；Export filtering signal.
In this embodiment, when exporting linear signal, the linear signal of output can also be filtered inside microcontroller
Wave processing for example, carrying out software filtering to linear signal, obtains filtering signal, and then export filtering signal, improves at signal
The precision of reason improves the efficiency of signal processing.
The signal processing circuit of the embodiment can connect multiple sensor probe simultaneously, carry out signal acquisition, pass through list
The control output of piece machine probe signal speed is fast, precision is high, signal processing circuit is small, can reduce cost, improve letter
Number processing efficiency.
It should be noted that step shown in the flowchart of the accompanying drawings can be in such as a group of computer-executable instructions
It is performed in computer system, although also, show logical order in flow charts, it in some cases, can be with not
The sequence being same as herein performs shown or described step.
Embodiment 3
Technical scheme of the present invention is illustrated with reference to preferred embodiment.
The embodiment includes two parts, and a part is signal processing circuit and its peripheral circuit, and another part is to signal
The single chip circuit that processing circuit is controlled.
Fig. 4 is a kind of schematic diagram of signal processing circuit according to embodiments of the present invention.As shown in figure 4, j1 is at signal
The communication control section of circuit is managed, j2, j3, j4, j5 are the probe Acquisition Circuit of No. four sensors, and for acquiring signal, U1 is
Signal processing chip LDC1614.
Above-mentioned signal processing chip LDC1614 is more sensitive to inductance coil, is used primarily on short-range contact button.
Application on eddy current displacement sensor needs to be adjusted peripheral circuit, can just ensure wanting for sensor measurement range
It asks.The circuit has four tunnel signal acquisition interface j2, j3, j4, j5, can carry out signal acquisition simultaneously to four road sensor probes simultaneously
Processing can generate resonance, signal filtering, signal amplification using the signal processing circuit and carry out AD samplings, and then utilize
The microcontroller of rear end reads result and carries out software linearity correction, finally exports linear signal, signal acquisition circuit AD samplings
Precision can reach 28 position digital signals, and sample frequency can reach more than 2Ksps per road.
It should be noted that other components shown in Fig. 4 in addition to j2, j3, j4, j5, U1, only make to illustrate, not
The content of the embodiment of the present invention is caused to limit.
The signal processing module of the embodiment uses LDC1614 chips and peripheral control circuits, and probe can be acquired
Analog signal be converted into high-precision digital signal, so as to feed back to microcontroller with carry out signal processing with output, improve
The efficiency of signal processing.
Fig. 5 is a kind of schematic diagram of the signal processing of microcontroller according to embodiments of the present invention.As shown in figure 5, microcontroller
Circuit is communicated using STM32 microcontrollers with signal processing circuit, and the driving source of signal processing circuit is configured, control
Signal processing circuit generates pumping signal, so as to add satisfactory probe excitation source signal, to trigger four current vortex positions
Probe 1,4 the first signal of acquisition of probe 2, probe 3 and probe of displacement sensor.Microcontroller can receive 28 high-precision numbers
Word signal.In addition, also the signal of acquisition is corrected for microcontroller and difference processing, enable in certain range line
Property output, software filtering is also carried out inside microcontroller to output signal, and then export.
The STM32 microcontrollers of the embodiment are controlled by software generates pumping signal to be sent to four probes, Neng Goushi
Now with 28 high accuracy data communication control of signal processing circuit, the efficiency of signal processing is improved.
It should be noted that above-mentioned probe 1, probe 2, probe 3, probe 4 are merely illustrative, which is not limited to pop one's head in
1st, probe 2, probe 3, probe 4, the embodiment can also include at least two spies in probe 1, probe 2, probe 3, probe 4
Head can also include more probes.
The embodiment in a manner that scm software is combined, is believed signal acquisition circuit in eddy current displacement sensor
Number processing is upper temporarily applies not yet, can meet multiplexed signal sampling, and can realize that high speed, high-precision signal are handled, preceding
It puts that signal processing circuit is small, the cost of signal processing can be reduced, improve the efficiency of signal processing.
Fig. 6 is the schematic diagram of another signal processing circuit according to embodiments of the present invention.As shown in fig. 6, at the signal
Reason circuit includes：Encourage source circuit 1, probe 2, probe 3, difference channel 4, detecting circuit 5, filtering and amplifying circuit 6 and number letter
Number processing circuit 7.
The signal processing circuit of the embodiment is handled by dsp software, and output linearity measuring range is corrected, to output electricity
Pressure signal is adjusted, and linearity measuring range exports with signal and carries out software processing by DSP, then passes through DAC and voltage follow electricity
The required voltage signal of road output.
Excitation source circuit 1 directly exports square-wave signal using DSP, and probe 1 and probe 2 pass through differential electrical by feedback signal
After road 3 carries out difference processing, detection processing is carried out using detecting circuit 4, then by entering number after filtering and amplifying circuit 5
Signal processing is carried out in signal processing circuit 6, to the signal of output into line linearity correction and error correction.
Since the output signal of the embodiment is directly exported by the DAC of DSP, output voltage signal range can be with
For 0-3.3V.
It should be noted that above-mentioned probe 1 and probe 2 are merely illustrative, which is not limited to probe 1 and probe 2, should
Embodiment can also include more probes.
STM32 microcontrollers compared with ball bearing made, can be controlled using a kind of and signal processing circuit be combined by the embodiment,
So as to fulfill the acquisition and processing to signal, which can be high-frequency signal.The STM32 microcontrollers of the embodiment pass through software
Signal processing circuit is controlled, generates probe pumping signal, is sent to four probes of eddy current displacement sensor, which can
Realize 28 high accuracy data communication control of STM32 microcontrollers and signal processing circuit；Signal processing circuit may be used
LDC1614 chips and peripheral control circuits, the part collected analog signal that can will pop one's head in are converted into high-precision number
Word signal so as to feed back to microcontroller, makes microcontroller carry out signal processing, and export to the signal received.Pass through above-mentioned side
Formula can realize four eddy current displacement sensors while signal is acquired that probe signal picking rate is high with precision, and
And have the advantages that circuit board is small and cost-effective.
Embodiment 4
The embodiment of the present invention additionally provides a kind of signal processing apparatus.It should be noted that the signal processing of the embodiment
Device can be used for performing the signal processing method of embodiment illustrated in fig. 2.
Fig. 7 is a kind of schematic diagram of signal processing apparatus according to embodiments of the present invention.As shown in fig. 7, the device includes：
Acquiring unit 30, conversion unit 40 and transmitting element 50.
Acquiring unit 30, for obtaining the first signal, wherein, the first signal is by least two eddy current displacement sensors
Probe is collected according to pumping signal.
Conversion unit 40, for the first signal to be converted into second signal, wherein, the precision of second signal is higher than the first letter
Number precision.
Transmitting element 50, for sending second signal to microcontroller, wherein, second signal is converted into linear letter by microcontroller
Number.
Optionally, which further includes：Generation unit and the first transmitting element.Wherein, generation unit, for obtaining the
Before one signal, under the control of microcontroller, pumping signal is generated；First transmitting element, for respectively at least two electric whirlpools
The probe for flowing displacement sensor sends pumping signal.
Optionally, conversion unit includes 40 at least one of：Resonance processing module, for the first signal to be passed through resonance
Processing, is converted into second signal；Filtering process module, for by the filtered processing of the first signal, being converted into second signal；It will
First signal passes through enhanced processing, is converted into second signal；Analog-to-digital conversion module, for analog signal to be passed through analog-to-digital conversion,
Digital signal is obtained, wherein, the first signal includes analog signal, and second signal includes digital signal.
The embodiment obtains the first signal by acquiring unit 30, wherein, the first signal is by least two current vortex displacements
The probe of sensor is collected according to pumping signal, and first signal is converted into second signal by conversion unit 40, wherein,
The precision of second signal is higher than the precision of the first signal, and second signal is sent to microcontroller by transmitting element 50, wherein, second
Signal is converted into linear signal by microcontroller.Due to realizing that acquiring multiple sensor simultaneously pops one's head in by a signal processing circuit
Signal, and feed back to microcontroller and handled, circuit is small and cost-effective, and the efficiency for solving signal processing low is asked
Topic, and then achieved the effect that improve the efficiency of signal processing.
The embodiment of the present invention additionally provides a kind of signal processing apparatus.It should be noted that the signal processing of the embodiment
Device can be used for performing the signal processing method of embodiment illustrated in fig. 3.
Fig. 8 is the schematic diagram of another signal processing apparatus according to embodiments of the present invention.As shown in figure 8, the device packet
It includes：Acquiring unit 60 and conversion unit 70.
Acquiring unit 60, for obtaining the second signal sent by signal processing circuit, wherein, second signal is by signal
Reason circuit is converted to obtain to the first signal, and the first signal is by the probe of at least two eddy current displacement sensors according to excitation
Signal acquisition obtains.
Conversion unit 70, for second signal to be converted into linear signal.
Optionally, which further includes：Setting unit, for obtain the second signal sent by signal processing circuit it
Before, the driving source of setting signal processing circuit, so that signal processing circuit generates pumping signal.
Optionally, conversion unit 70 includes：Correction module, for, into line linearity correction, being converted into linear to second signal
Signal.
Optionally, conversion unit 70 includes：Correction and differential processing module, for being corrected to second signal and difference
Processing, is converted into linear signal, wherein, linear signal is exported in target range interior lines property.
Optionally, which further includes：Output unit, for after second signal is converted into linear signal, exporting
Linear signal.
Optionally, which further includes：Filter module and output module.Wherein, filter module, for exporting
During linear signal, linear signal is filtered, obtains filtering signal；Output module, for exporting filtering signal.
The embodiment obtains the second signal sent by signal processing circuit by acquiring unit 60, wherein, second signal
The first signal is converted to obtain by signal processing circuit, the first signal by least two eddy current displacement sensors probe
It is collected according to pumping signal, second signal is converted by linear signal by conversion unit 70.Due to passing through a signal
Processing circuit realizes the signal for acquiring multiple sensor probe simultaneously, and feeds back to microcontroller and is handled, circuit it is small and
It is cost-effective, solve the problems, such as that the efficiency of signal processing is low, and then achieved the effect that improve the efficiency of signal processing.
Embodiment 5
The embodiment of the present invention additionally provides a kind of storage medium.The storage medium includes the program of storage, wherein, in program
Equipment performs the signal processing method of the embodiment of the present invention where controlling storage medium during operation.
Embodiment 6
The embodiment of the present invention additionally provides a kind of processor.The processor is used to run program, wherein, program is held when running
The signal processing method of the row embodiment of the present invention.
Obviously, those skilled in the art should be understood that each module of the above-mentioned present invention or each step can be with general
Computing device realize that they can concentrate on single computing device or be distributed in multiple computing devices and be formed
Network on, optionally, they can be realized with the program code that computing device can perform, it is thus possible to which they are stored
In the storage device by computing device come perform either they are fabricated to respectively each integrated circuit modules or by they
In multiple modules or step be fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific
Hardware and software combines.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, that is made any repaiies
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (18)
1. a kind of signal processing system, which is characterized in that including：
First signal for obtaining the first signal, and is converted into second signal by signal processing circuit, wherein, described
One signal is collected by the probe of at least two eddy current displacement sensors according to pumping signal, the precision of the second signal
Higher than the precision of first signal；
Microcontroller is connected with the signal processing circuit, for obtaining the second signal, and the second signal is converted
For linear signal.
2. system according to claim 1, which is characterized in that the signal processing circuit includes：
First signal for acquiring first signal, and is converted into the second signal by signal processing chip.
3. system according to claim 1, which is characterized in that the signal processing circuit further includes：
Peripheral control circuits are connected with the signal processing chip, under the adjustment of the signal processing chip, controlling
The measuring range of the eddy current displacement sensor.
4. system according to claim 1, which is characterized in that the signal processing circuit further includes：
Source circuit is encouraged, for generating the pumping signal；
Difference channel, for being acquired to the probe by least two eddy current displacement sensors according to the pumping signal
First signal arrived carries out difference processing, obtains third signal；
Detecting circuit is connected with the difference channel, for carrying out detection processing to the third signal, obtains the 4th letter
Number；
Filtering and amplifying circuit is connected with the detecting circuit, for being amplified filtering process to the fourth signal, obtains
5th signal；
Digital signal processing circuit is connected with the filtering and amplifying circuit, for being corrected to the 5th signal, obtains
The second signal.
5. system according to claim 4, which is characterized in that the signal processing circuit further includes：
Digital analog converter, for the second signal of digital form to be converted into the second signal of analog form；
Voltage follower circuit is connected with the digital analog converter, for exporting second letter of the analog form
Voltage signal in number.
6. a kind of signal processing method, which is characterized in that including：
The first signal is obtained, wherein, first signal is believed by the probe of at least two eddy current displacement sensors according to excitation
It number collects；
First signal is converted into second signal, wherein, the precision of the second signal is higher than the essence of first signal
Degree；
The second signal is sent to microcontroller, wherein, the second signal is converted into linear signal by the microcontroller.
7. according to the method described in claim 6, it is characterized in that, before first signal is obtained, the method is also wrapped
It includes：
Under the control of the microcontroller, the pumping signal is generated；
Respectively the pumping signal is sent to the probe of at least two eddy current displacement sensors.
8. according to the method described in claim 6, include it is characterized in that, first signal is converted into the second signal
At least one of：
First signal by resonance is handled, is converted into the second signal；
By the filtered processing of the first signal, it is converted into the second signal；
By first signal by enhanced processing, it is converted into the second signal；
Analog signal is passed through into analog-to-digital conversion, obtains digital signal, wherein, first signal includes the analog signal, institute
It states second signal and includes the digital signal.
9. a kind of signal processing method, which is characterized in that including：
The second signal that is sent by signal processing circuit is obtained, wherein, the second signal is by the signal processing circuit to the
One signal is converted to obtain, and first signal is adopted by the probe of at least two eddy current displacement sensors according to pumping signal
Collection obtains；
The second signal is converted into linear signal.
10. according to the method described in claim 9, it is characterized in that, obtaining as described in being sent the signal processing circuit
Before second signal, the method further includes：
The driving source of the signal processing circuit is set, so that the signal processing circuit generates the pumping signal.
11. according to the method described in claim 9, it is characterized in that, the second signal is converted into the linear signal packet
It includes：
To the second signal into line linearity correction, it is converted into the linear signal.
12. according to the method described in claim 9, it is characterized in that, the second signal is converted into the linear signal packet
It includes：
The second signal is corrected and difference processing, is converted into the linear signal, wherein, the linear signal is in mesh
Linear convergent rate in scalar journey.
13. according to the method described in claim 9, it is characterized in that, the second signal is converted into the linear signal
Later, the method further includes：
Export the linear signal.
14. according to the method for claim 13, which is characterized in that when exporting the linear signal, the method is also wrapped
It includes：
The linear signal is filtered, obtains filtering signal；
Export the filtering signal.
15. a kind of signal processing apparatus, which is characterized in that
Acquiring unit, for obtaining the first signal, wherein, first signal by least two eddy current displacement sensors spy
Head is collected according to pumping signal；
Conversion unit, for first signal to be converted into second signal, wherein, the precision of the second signal is higher than described
The precision of first signal；
Transmitting element, for sending the second signal to microcontroller, wherein, the second signal is converted by the microcontroller
Linear signal.
16. a kind of signal processing apparatus, which is characterized in that
Acquiring unit, for obtaining the second signal sent by signal processing circuit, wherein, the second signal is by the signal
Processing circuit is converted to obtain to the first signal, first signal by least two eddy current displacement sensors probe root
It is collected according to pumping signal；
Conversion unit, for the second signal to be converted into linear signal.
17. a kind of storage medium, which is characterized in that the storage medium includes the program of storage, wherein, it is run in described program
When control the storage medium where signal processing method in equipment perform claim requirement 6 to 14 described in any one.
18. a kind of processor, which is characterized in that the processor is used to run program, wherein, right of execution when described program is run
Profit requires the signal processing method described in any one in 6 to 14.
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Cited By (1)
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| CN115657584A (en) * | 2022-10-19 | 2023-01-31 | 河北时光射频技术有限公司 | Anti-interference frequency tuning controller of excitation source, method and application |
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Application publication date: 20180612 |