CN110177068A - Signal recognition device and method - Google Patents
Signal recognition device and method Download PDFInfo
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- CN110177068A CN110177068A CN201910511746.1A CN201910511746A CN110177068A CN 110177068 A CN110177068 A CN 110177068A CN 201910511746 A CN201910511746 A CN 201910511746A CN 110177068 A CN110177068 A CN 110177068A
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- 235000008434 ginseng Nutrition 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 15
- 230000002463 transducing effect Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0012—Modulated-carrier systems arrangements for identifying the type of modulation
Abstract
The embodiment of the invention discloses a kind of signal recognition device and method, which includes the digital processing unit being successively electrically connected, transmitting terminal energy converter, modem and receiving end energy converter；The digital processing unit is used to control the first via signal parameter and second road signal parameter of the transmitting terminal energy converter transmitting；The transmitting terminal energy converter is for sending first via signal and second road signal；The modem obtains modulated signal for being modulated to the first via signal and the second road signal；The digital processing unit is for receiving the modulated signal, to realize accuracy of identification height, can exclusive PCR, meet the needs of high-precision occasion.
Description
Technical field
The present embodiments relate to signal processing technology more particularly to a kind of signal recognition device and methods.
Background technique
Accurately identifying for ultrasound echo signal is the key link in applications of ultrasound technology, medical ultrasonic, flow measurement,
There is wide application in the fields such as gas phase measurement.
Currently used recognition methods is identified using signal peak, that is, is examined after receiving echo-signal
Wave, the time that the simple recognition threshold corresponding time receives as echo-signal.
This method accuracy of identification is low, is easy to be interfered, and is no longer satisfied the needs of high-precision occasion.
Summary of the invention
The present invention provides a kind of signal recognition device and method, to realize accuracy of identification height, can exclusive PCR, meet high
The needs of precision occasion.
In a first aspect, the embodiment of the invention provides a kind of signal recognition device, including at the number that is successively electrically connected
Manage device, transmitting terminal energy converter, modem and receiving end energy converter；
The digital processing unit is used to control the first via signal parameter and the second road letter of the transmitting terminal energy converter transmitting
Number parameter；
The transmitting terminal energy converter is for sending first via signal and second road signal；
The modem obtains modulation letter for being modulated to the first via signal and the second road signal
Number；
The digital processing unit is for receiving the modulated signal.
Second aspect, the embodiment of the invention also provides a kind of signal recognition methods, comprising:
Modulated signal is generated according to the first signal and the second signal, first signal and the second signal interval are default
Time cycle；
First signal and the second signal are sent by transmitting terminal energy converter, for digital processing unit according to the tune
Signal processed determines echo-signal duration.
The embodiment of the present invention includes the digital processing unit being successively electrically connected, transmitting terminal energy converter, modem and connect
Receiving end energy converter；The digital processing unit is used to control first via signal parameter and the second tunnel of the transmitting terminal energy converter transmitting
Signal parameter；The transmitting terminal energy converter is for sending first via signal and second road signal；The modem for pair
The first via signal and the second road signal are modulated, and obtain modulated signal；The receiving end energy converter is for receiving
The modulated signal determines echo-signal duration by modulated signal, with realize accuracy of identification height, can exclusive PCR, meet
The needs of high-precision occasion.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram for signal recognition device that the embodiment of the present invention one provides；
Fig. 2 is a kind of circuit diagram for signal recognition device that the embodiment of the present invention one provides；
Fig. 3 is a kind of flow diagram of signal recognition method provided by Embodiment 2 of the present invention；
Fig. 4 is the flow diagram of the digital processing unit course of work provided by Embodiment 2 of the present invention；
Fig. 5 is the waveform diagram of first via signal provided by Embodiment 2 of the present invention；
Fig. 6 is a kind of waveform diagram of determining echo-signal duration provided by Embodiment 2 of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
It should be mentioned that some exemplary embodiments are described as before exemplary embodiment is discussed in greater detail
The processing or method described as flow chart.Although each step is described as the processing of sequence by flow chart, many of these
Step can be implemented concurrently, concomitantly or simultaneously.In addition, the sequence of each step can be rearranged.When its operation
The processing can be terminated when completion, it is also possible to have the additional step being not included in attached drawing.The processing can be with
Corresponding to method, function, regulation, subroutine, subprogram etc..
Embodiment one
Fig. 1 is a kind of structural schematic diagram for signal recognition device that the embodiment of the present invention one provides, institute of the embodiment of the present invention
Signal recognition method provided by any embodiment of the invention can be performed in the signal recognition device of offer, and it is corresponding to have execution method
Functional module and beneficial effect.The device includes the digital processing unit 101 being successively electrically connected, transmitting terminal energy converter 102, adjusts
Modulator-demodulator 103 and receiving end energy converter 104；The digital processing unit 101 is used to control the transmitting terminal energy converter transmitting
First via signal parameter and second road signal parameter；The transmitting terminal energy converter 102 is for sending first via signal and the second tunnel
Signal；The modem 103 obtains modulation letter for being modulated to the first via signal and the second road signal
Number；The receiving end energy converter 104 is for receiving the modulated signal.
Above-mentioned digital processing unit includes but is not limited to dsp chip, micro-control unit (Microcontroller Unit；
MCU), also known as one chip microcomputer (Single Chip Microcomputer) or single-chip microcontroller, wherein dsp chip refers to energy
Enough realize the chip of Digital Signal Processing.Dsp chip is a kind of microprocessor of fast powerful, is unique in that its energy
Immediately processing data.The inside of the dsp chip Harvard structure separated using program and data, has special hardware multiplier,
It can be used to quickly realize various digital signal processing algorithms.
Energy converter refers to the device that electric energy harmony can be converted mutually.In echo depth sounder, Doppler log and acoustic correlation
It is used in tachometer.The energy converter for converting electric energy to sound energy is known as transmitting terminal energy converter；Sound can be converted into the transducing of electric energy
Device is receiving end energy converter.Transmitting terminal energy converter and receiving end energy converter are usually to be used separately, but can also share one.
Wherein, the main performance index of transmitting terminal energy converter and receiving end energy converter has: working frequency, frequency bandwidth, electroacoustic frequency, humorous
Impedance, directive property and sensitivity when vibration frequency etc..
Described device further includes multiway analog switch, the multiway analog switch respectively with the digital processing unit and described
The connection of transmitting terminal energy converter；The multiway analog switch is used to control the first via signal by on-off and second road is believed
Number level.Wherein, the digital processing unit, is specifically used for: exporting the first via signal and second tunnel by pin
The level of signal, the first via signal and the second road signal pass through the multiway analog switch to the transmitting terminal transducing
Device.
The signal that above-mentioned first via signal and second road signal are made of low and high level, illustratively, from digital processing
The high level of the pin output first via signal of device is 3V high level, and the low level for exporting first via signal is 0V low level, the
The high level of two road signals is 3V high level, and the low level for exporting second road signal is 0V low level.When first via signal and
When the high level of two road signals passes through multiway analog switch, multiway analog switch is switched into open state, by first via signal
The high level of 24V is zoomed into the high level of 3V in second road signal, then is emitted by transmitting terminal energy converter to receiving end
Energy converter.
Illustratively, when the low level of first via signal and second road signal is 0V low level, multiway analog switch is cut
Closed state is shifted to, then transmitting terminal energy converter emits 0V low level, is emitted by transmitting terminal energy converter to receiving end transducing
Device.
Wherein, pass through the preset time between first via signal and the high level signal and low level signal of second road signal
It is sent, can accurately detect the duration of echo-signal.
Described device further include: amplifying circuit, wherein one end of the amplifying circuit and the receiving end energy converter are electrical
Connection, the other end of the amplifying circuit and the modem are electrically connected.
After receiving end energy converter receives modulated signal, modulated signal is sent to by digital processing unit by amplifying circuit,
Wherein, amplifying circuit includes: primary amplifying circuit, common amplifier circuit, signal power amplifying circuit, and digital processing unit receives
After modulated signal, further according to modulated signal detection echo-signal duration, for details, reference can be made to Fig. 2 shows a kind of signal identification dress
The circuit diagram set.
The technical solution of the embodiment of the present invention passes through the digital processing unit, transmitting terminal energy converter, modulation being successively electrically connected
Demodulator and receiving end energy converter；The digital processing unit is used to control the first via signal ginseng of the transmitting terminal energy converter transmitting
Several and second road signal parameter；The transmitting terminal energy converter is for sending first via signal and second road signal；The modulatedemodulate
It adjusts device for being modulated to the first via signal and the second road signal, obtains modulated signal；The receiving end transducing
Device is for receiving the modulated signal, and the duration by detecting echo-signal in digital processing unit, to realize accuracy of identification height,
Can exclusive PCR, meet the needs of high-precision occasion.
Embodiment two
Fig. 3 is a kind of flow diagram of signal recognition method provided by Embodiment 2 of the present invention, and the present embodiment is applicable
In detect echo-signal duration the case where, this method can be executed by signal recognition device, be specifically comprised the following steps:
Step 310, modulated signal is generated according to first via signal and second road signal, the first via signal and described the
Two preset time cycles in tunnel sigtnal interval.
In the present embodiment, what first via signal and second road signal were set by digital processing unit, digital processing unit
Realize following process, for details, reference can be made to the flow diagrams of the digital processing unit course of work shown in Fig. 4: initializing variable, control
It makes display, key input part, control transmitting and receives, AD acquisition is waited to interrupt, AD data deposit memory, signal adding window, FIR
Filtering, identification signal characteristic value, the starting point for calculating signal characteristic value, judges whether starting point is abnormal, slotting at signal envelope extraction
Value method seeks time value.
The signal that above-mentioned first via signal and second road signal are made of low and high level, illustratively, Fig. 5 show
The waveform diagram of signal all the way, the low level of high level and 0V including 3V.First via signal and second road signal
The phase difference for having 0.5 period was spaced in the preset time cycle, illustratively, such as the week of first via signal and second road signal
The value that period is divided into (N+0.5) * T, N is more than or equal to 2 and to be less than or equal to the vibration period that 5, T is transmitting terminal energy converter.
Step 320, the first via signal and the second road signal are sent by transmitting terminal energy converter, for digital processing
Device determines echo-signal duration according to the modulated signal.
It is described that echo-signal duration is determined according to the modulated signal for digital processing unit, comprising: with zero in the present embodiment
Moment is starting point, as terminal at the time of there is opposite feature value using the modulated signal, is denoted as the first duration；To detect
Stating modulated signal is that starting point as terminal at the time of there is opposite feature value using the modulated signal is denoted as the second duration；It calculates
The difference of first duration and second duration obtains the echo-signal duration.
Wherein, the characteristic value of modulated signal can be wave crest characteristic value, be also possible to trough characteristic value, when modulated signal exists
It is wave crest characteristic value occur with certain period on waveform diagram horizontal datum, then the opposite feature value of modulated signal is that trough is special
Value indicative；When modulated signal is trough characteristic value occur with certain period on waveform diagram horizontal datum, then modulated signal
Opposite feature value is wave crest characteristic value.
In the present embodiment, the first duration refers to that receiving end energy converter start-up time opposite feature value occurs to modulated signal
At the moment, it is denoted as t1, the second duration refers to that receiving end energy converter receives modulated signal and opposite feature value occurs to modulated signal
Moment is denoted as t2, and for details, reference can be made to a kind of waveform diagrams of determining echo-signal duration shown in Fig. 6, specifically, echo is believed
Number when a length of T, make the difference what value obtained by the first duration and the second duration.Wherein, since first via signal and second road signal are deposited
In the phase difference in 0.5 period, so that the modulated signal formed can show apparent modulating characteristic in waveform diagram, wherein
Modulating characteristic refers to that apparent opposite feature value occurs in the envelope part of modulated signal, and the duration △ t of opposite feature value occurs
It is 1.5 times of receiving end energy converter period illustratively greater than the period of receiving end energy converter.Specifically, modulated signal occurs
The opposite feature value moment can be calculated by digital processing unit, particularly by there is the zero crossing of opposite feature value
Moment carries out what statistics obtained.
The technical solution of the embodiment of the present invention generates modulated signal, the first via according to first via signal and second road signal
Signal and second road signal interval preset time cycle, then by digital processing unit according to the first duration and the second duration calculation
Obtain the duration of echo-signal, wherein the first duration is that opposite feature value occur using zero moment as starting point with modulated signal
Moment is terminal, and the second duration is to detect that the modulated signal is starting point, opposite feature value occurs with the modulated signal
At the time of be terminal, the technical solution identification signal precision of the present embodiment is high, strong antijamming capability, can satisfy high-precision and identifies
The requirement of signal.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (7)
1. a kind of signal recognition device, which is characterized in that including be successively electrically connected digital processing unit, transmitting terminal energy converter,
Modem and receiving end energy converter；
The digital processing unit is used to control the first via signal parameter and second road signal ginseng of the transmitting terminal energy converter transmitting
Number；
The transmitting terminal energy converter is for sending first via signal and second road signal；
The modem obtains modulated signal for being modulated to the first via signal and the second road signal；
The receiving end energy converter is for receiving the modulated signal.
2. the apparatus according to claim 1, which is characterized in that described device further includes multiway analog switch, the multichannel
Analog switch is connect with the digital processing unit and the transmitting terminal energy converter respectively；The multiway analog switch is used for by logical
The level of disconnected the control first via signal and the second road signal.
3. the apparatus of claim 2, which is characterized in that the digital processing unit is specifically used for:
The level of the first via signal and the second road signal, the first via signal and described second are exported by pin
Road signal passes through the multiway analog switch to the transmitting terminal energy converter.
4. the apparatus according to claim 1, which is characterized in that described device further include:
Amplifying circuit, wherein one end of the amplifying circuit and the receiving end energy converter are electrically connected, the amplifying circuit
The other end and the modem are electrically connected.
5. a kind of signal recognition method characterized by comprising
Modulated signal, the first via signal and the second road signal interval are generated according to first via signal and second road signal
The preset time cycle；
The first via signal and the second road signal are sent by transmitting terminal energy converter, for digital processing unit according to the tune
Signal processed determines echo-signal duration.
6. according to the method described in claim 5, it is characterized in that, wherein, there is 0.5 period in the preset time cycle
Phase difference.
7. according to the method described in claim 5, it is characterized in that, described determine for digital processing unit according to the modulated signal
Echo-signal duration, comprising:
Using zero moment as starting point, as terminal at the time of there is opposite feature value using the modulated signal, it is denoted as the first duration；
To detect the modulated signal as starting point, as terminal at the time of there is opposite feature value using the modulated signal, note
For the second duration；
The difference for calculating first duration Yu second duration obtains the echo-signal duration.
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| CN201910511746.1A CN110177068A (en) | 2019-06-13 | 2019-06-13 | Signal recognition device and method |
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| CN201910511746.1A CN110177068A (en) | 2019-06-13 | 2019-06-13 | Signal recognition device and method |
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Citations (6)
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|---|---|---|---|---|
| US4271708A (en) * | 1978-05-16 | 1981-06-09 | Fuji Electric Co., Ltd. | Ultrasonic measuring apparatus |
| CN101055311A (en) * | 2007-03-01 | 2007-10-17 | 中国海洋石油总公司 | Multiple beam section sonar signal processing device |
| CN107229052A (en) * | 2017-07-26 | 2017-10-03 | 桂林电子科技大学 | Trailer-mounted radar Object measuring system and operation method based on Multiple Frequency Shift Keying system |
| CN109186693A (en) * | 2018-08-02 | 2019-01-11 | 电子科技大学 | A kind of detection of the backscatter signal circuit of self-adapting ultrasonic |
| CN109387825A (en) * | 2017-08-11 | 2019-02-26 | 德克萨斯仪器股份有限公司 | Pumping signal sequence for ultrasonic transducer |
| CN209787200U (en) * | 2019-06-13 | 2019-12-13 | 上海一诺仪表有限公司 | Signal recognition device |
-
2019
- 2019-06-13 CN CN201910511746.1A patent/CN110177068A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4271708A (en) * | 1978-05-16 | 1981-06-09 | Fuji Electric Co., Ltd. | Ultrasonic measuring apparatus |
| CN101055311A (en) * | 2007-03-01 | 2007-10-17 | 中国海洋石油总公司 | Multiple beam section sonar signal processing device |
| CN107229052A (en) * | 2017-07-26 | 2017-10-03 | 桂林电子科技大学 | Trailer-mounted radar Object measuring system and operation method based on Multiple Frequency Shift Keying system |
| CN109387825A (en) * | 2017-08-11 | 2019-02-26 | 德克萨斯仪器股份有限公司 | Pumping signal sequence for ultrasonic transducer |
| CN109186693A (en) * | 2018-08-02 | 2019-01-11 | 电子科技大学 | A kind of detection of the backscatter signal circuit of self-adapting ultrasonic |
| CN209787200U (en) * | 2019-06-13 | 2019-12-13 | 上海一诺仪表有限公司 | Signal recognition device |
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