CN109781861B - Electronic switch type main/auxiliary multi-channel ultrasonic acquisition system and electronic equipment - Google Patents
Electronic switch type main/auxiliary multi-channel ultrasonic acquisition system and electronic equipment Download PDFInfo
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Abstract
The invention provides an electronic switch type main/auxiliary multi-channel ultrasonic acquisition system and electronic equipment, wherein the acquisition system comprises: the ultrasonic monitoring system comprises N ultrasonic probes, N-path selection switches, an ultrasonic transmitting module and an ultrasonic collecting module, wherein the ultrasonic probes are used for collecting ultrasonic data; if the ith probe is not provided with an auxiliary channel, directly acquiring ultrasonic data aiming at the ith probe; if the ith probe is provided with a plurality of auxiliary channels, dividing the ultrasonic data fed back by a path of selection switch and an ultrasonic probe into a plurality of paths of ultrasonic data, and acquiring each path of ultrasonic data through an acquisition channel corresponding to each auxiliary channel; setting the auxiliary channel for the ith probe means setting different gains for the ith probe and outputting ultrasonic data with different gains through different acquisition channels. The invention avoids the problem that a certain channel signal needs to be collected again due to overload, and simultaneously realizes that the probes at the same position of different auxiliary channel signals are basically similar in waveform.
Description
Technical Field
The invention belongs to the technical field of in-service inspection of nuclear power stations, relates to an acquisition system, and particularly relates to an electronic switch type main/auxiliary multi-channel ultrasonic acquisition system and electronic equipment.
Background
Nuclear power plant safety is of paramount importance and the plant is subject to thorough inspection and maintenance during each refueling. In-service inspection is one of important contents, ultrasonic flaw detection is required to be carried out on welding seams of key equipment (such as a pressure vessel, a steam generator, a main pipeline and the like), a plurality of refraction angle probes are usually specified to be adopted in operation regulations, and each angle probe is arranged in four directions to carry out whole-volume detection on the welding seams, so that 8-16 ultrasonic probes are required for one-time scanning, and a multi-channel ultrasonic flaw detector is required.
In a conventional multi-channel ultrasonic detection instrument, a plurality of probes, a plurality of corresponding transceiver circuits, a plurality of amplifiers, a plurality of band-pass filters and one analog-to-digital converter (multi-channel recycling) are used. The function of the auxiliary channel is not provided, namely the function of outputting a plurality of signals with different amplitudes by one probe signal is not provided.
The nuclear power station key equipment often has ionizing radiation, can cause the injury to the human body long-time work, and check out test set is comparatively huge moreover, if pressure vessel detects and adopts remote control robot hand. In addition, the time window for nuclear power plant inspection and maintenance is limited, and inspection and maintenance work needs to be completed within a limited time. In the ultrasonic detection process, the gain set according to the program requirement sometimes causes amplitude overload of a detection signal because of a large defect, and cannot correctly perform qualitative and quantitative analysis on the defect, and at the moment, the gain must be reduced to perform data acquisition again to obtain an amplitude-overload-free waveform signal, so that the working time is prolonged, the labor intensity is increased, and an operator is irradiated by more radiation. At present, the time division multiplexing technology of the amplifier is adopted to realize that one probe signal has different gains, which is the time division multiplexing amplifier in the process of multiple transmission and reception of the ultrasonic probe. In practice, a probe is the process of transmitting and receiving ultrasound waves at a number of different locations. The signals of the auxiliary channel and the main channel are not signals at the same position and have slightly different signal shapes. The distance between different positions depends on the depth of the scan, the speed of the scan and the accuracy requirements of the detected positions.
Therefore, how to provide an electronic switch type main/auxiliary multi-channel ultrasonic acquisition system and an electronic device to solve the problems of the prior art, such as occurrence of data re-acquisition due to signal overload, generation of work delay, increase of labor intensity, and more radiation exposure to an operator, has become a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide an electronic switch-type main/auxiliary multi-channel ultrasound acquisition system and an electronic device, which are used to solve the problems of occurrence of data re-acquisition phenomenon due to signal overload, generation of work delay, increase of labor intensity, and exposure of operators to more radiation in the prior art.
To achieve the above and other related objects, there is provided in accordance with one aspect of the present invention an electronically switched master/slave multi-channel ultrasound acquisition system including: n ultrasonic probes, N route selector switches corresponding to N ultrasonic probes; n is a positive integer greater than 1; the ultrasonic transmitting module is connected with the multi-path selection switch and is used for transmitting ultrasonic data; the ultrasonic acquisition module is respectively connected with the multi-path selection switch and the ultrasonic emission module and is used for acquiring the ultrasonic data; if no auxiliary channel is set for the ith probe, the ultrasonic acquisition module directly acquires ultrasonic data for the ith probe; if a plurality of auxiliary channels are arranged for the ith probe, the ultrasonic wave acquisition module divides ultrasonic wave data fed back by a path of selection switch and an ultrasonic wave probe into a plurality of paths of ultrasonic wave data, and each path of ultrasonic wave data is acquired by the acquisition channel corresponding to each auxiliary channel; setting the auxiliary channel for the ith probe means setting different gains for the ith probe and outputting ultrasonic data with different gains through different acquisition channels.
In an embodiment of the present invention, the ultrasonic acquisition module includes a multi-path voltage follower, an amplifier electrically connected to the multi-path voltage follower, a filter electrically connected to the amplifier, an analog-to-digital converter electrically connected to the filter, a programmable device electrically connected to the analog-to-digital converter, and a digital signal processor electrically connected to the programmable device; the number of the amplifiers and the filters is the same as that of the paths of the multi-path followers.
In an embodiment of the invention, the programmable device is connected to the digital signal processor through an external memory interface.
In an embodiment of the present invention, the multi-path voltage follower includes a first capacitor, a resistor, a second capacitor, a first negative feedback amplifier, a multi-path analog switch, and a second negative feedback amplifier connected to each path of analog switch; the closed loop gain of each second negative feedback amplifier is in one-to-one correspondence and identical to the gain set on the ith probe; the multi-path analog switch comprises a plurality of paths of analog switches connected in parallel.
In an embodiment of the present invention, one end of a first capacitor, one end of a resistor, and one end of a second capacitor are connected to the positive input end of the first negative feedback amplifier, the other end of the first capacitor is connected to each of the selection switches, the other end of the resistor is grounded, the other end of the second capacitor is grounded, and the negative input end of the first negative feedback amplifier is connected to the output end; the output end of the first negative feedback amplifier is connected with one end of each analog switch, the other end of each analog switch is connected with the positive input end of the corresponding second negative feedback amplifier, and the output end of each second negative feedback amplifier is connected with the input end of each amplifier.
In an embodiment of the present invention, if no auxiliary channel is set for the ith probe, only one of the multiple analog switches is kept in the on state, and the other analog switches are kept in the off state.
In an embodiment of the invention, if a plurality of auxiliary channels are set for the ith probe, the analog switches corresponding to the plurality of auxiliary channels in the multi-channel analog switch are kept in a conducting state.
In an embodiment of the present invention, the ultrasonic wave transmitting module includes: the synchronous pulse emitter and the decoder are connected with the synchronous pulse emitter and the multi-way selection switch; the synchronous pulse transmitter is used for transmitting synchronous pulses according to the sampling frequency; the decoder is used for selecting a channel from the multi-way selector switch and sequentially applying high voltage to the probe on the selected channel at a sampling frequency so as to generate reverse sharp pulses applied to the probe and enable the probe to transmit ultrasonic data.
In another aspect, the invention provides an electronic device comprising the electronically switched primary/secondary multi-channel ultrasound acquisition system.
As described above, the electronic switch type main/auxiliary multi-channel ultrasonic acquisition system and the electronic device of the present invention have the following advantages:
the electronic switch type main/auxiliary multi-channel ultrasonic acquisition system and the electronic equipment realize that a probe signal simultaneously enters a plurality of amplifiers with different gains to obtain signals with different gains of the same probe, can sequentially and circularly carry out rapid digitization on the signals with different gains, avoid the problem that the signals are required to be acquired again due to the overload of a certain channel signal, and simultaneously realize that the probes with different auxiliary channel signals from the same position and the waveforms are basically similar.
Drawings
Fig. 1 is a schematic structural diagram of an electronic switch type main/auxiliary multi-channel ultrasound acquisition system according to an embodiment of the present invention.
FIG. 2 is a circuit diagram of the 4-way voltage follower of the present invention.
Fig. 3 is a schematic diagram of the electronic device according to the present invention.
Description of the element reference numerals
1 electronic switch type main/auxiliary multi-channel ultrasonic acquisition system
11 ultrasonic probe
12N-way selection switch
13 ultrasonic wave transmitting module
14 ultrasonic acquisition module
131 synchronous pulse emitter
132 decoder
141 multi-way voltage follower
142 amplifier
143 filter
144 analog-to-digital converter
145 programmable device
146 digital signal processor
3 electronic device
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
This embodiment provides an electronic switch formula owner/supplementary multichannel ultrasonic acquisition system, electronic switch formula owner/supplementary multichannel ultrasonic acquisition system includes:
n ultrasonic probes, N route selector switches corresponding to N ultrasonic probes; n is a positive integer greater than 1;
the ultrasonic transmitting module is connected with the multi-path selection switch and is used for transmitting ultrasonic data;
the ultrasonic acquisition module is respectively connected with the multi-path selection switch and the ultrasonic emission module and is used for acquiring the ultrasonic data;
if no auxiliary channel is set for the ith probe, the ultrasonic acquisition module directly acquires ultrasonic data for the ith probe;
if a plurality of auxiliary channels are arranged for the ith probe, the ultrasonic wave acquisition module divides ultrasonic wave data fed back by a path of selection switch and an ultrasonic wave probe into a plurality of paths of ultrasonic wave data, and each path of ultrasonic wave data is acquired by the acquisition channel corresponding to each auxiliary channel;
setting the auxiliary channel for the ith probe means setting different gains for the ith probe and outputting ultrasonic data with different gains through different acquisition channels.
The electronically switched main/auxiliary multi-channel ultrasound acquisition system provided by the present embodiment will be described in detail with reference to the drawings. In this embodiment, the parameters of each channel in the main/auxiliary multi-channel ultrasonic acquisition system, including the high voltage value, the amplifier gain, the band-pass filtering parameters, the a \ D conversion frequency and the resolution, are set by the PC. Setting the auxiliary channel for the ith probe means setting different gains for the ith probe and outputting ultrasonic data with different gains through different acquisition channels.
In order to avoid the phenomenon of data acquisition again due to signal overload, a plurality of different gains need to be set for signals of the same probe to obtain signals with different gains, namely an auxiliary channel with variable gain needs to be set, even if a certain channel signal is overloaded, other signals with lower gains can not be used by the overloaded channel, so that more accurate quantitative and qualitative analysis can be carried out on the signals, and in order to overcome the problem of non-simultaneity of the acquired waveform data, four paths of signals are divided behind each main channel, and rapid cycle digitalization is carried out sequentially (1-4) by utilizing a rapid A \ D analog-to-digital converter, so that the acquired waveforms have simultaneity, namely different auxiliary channel signals come from the same position of the probe, and the waveform shapes are approximately the same. The embodiment provides an electronic switch type main/auxiliary multi-channel ultrasonic acquisition system: the ultrasonic probe comprises a plurality of ultrasonic probes, a main channel multi-channel electronic analog switch (one of sixteen can be selected, such as CD4067 and AD705, one of eight can be selected, such as CD4051, AD7501 and AD7503, and one of four can be selected), an auxiliary channel is a four-channel analog switch (such as chips CD4066 and AD7510), a four-channel follower, a four-channel band-pass filter, an A \ D converter, an FPGA, a DSP, a PC and the like. The four-way selection switch device can be switched on and off independently for each way of switch, and also can be switched on and off simultaneously for a plurality of ways, wherein the channel No. 1 is always in an on state (or any way of the 4 ways of channels is always in an on state). A main channel (probe) is divided into four auxiliary channels, each auxiliary channel can be set with different gains according to actual conditions, the four auxiliary channels share one A \ D analog-to-digital converter, and signals of the auxiliary channels are digitized in a time-sharing and sequential cycle mode. Referring to fig. 1, a schematic structural diagram of an electronic switch type main/auxiliary multi-channel ultrasound acquisition system in an embodiment is shown. As shown in fig. 1, the electronically switched main/auxiliary multi-channel ultrasound acquisition system 1 includes:
16 ultrasonic probes 11, and 16-way selector switches 12 corresponding to the 16 ultrasonic probes 11.
And the ultrasonic wave transmitting module 13 connected with the 16-way selection switch 12 is used for transmitting ultrasonic wave data. In this embodiment, the ultrasonic wave transmitting module 13 includes a sync pulse transmitter 131 and a decoder 132 connected to the sync pulse transmitter 131 and the multiplexer 12.
Wherein the synchronization pulse transmitter 131 is configured to transmit the synchronization pulse according to the sampling frequency.
The decoder 132 is used for selecting a channel from the multiplexer 12 and sequentially applying a high voltage to the probe on the selected channel at a sampling frequency to generate a reverse spike applied to the probe, so that the probe transmits ultrasonic data.
And the ultrasonic acquisition module 14 is respectively connected with the multi-way selection switch 12 and the ultrasonic emission module 13 and is used for acquiring the ultrasonic data. With continued reference to fig. 1, the ultrasound acquisition module 14 includes a multi-way voltage follower 141, an amplifier 142 electrically connected to the multi-way voltage follower 141, a filter 143 electrically connected to the amplifier 142, an analog-to-digital converter 144 electrically connected to the filter 143, a programmable device 145 electrically connected to the analog-to-digital converter 144, and a digital signal processor 146 electrically connected to the programmable device 145. The number of the amplifiers 142 and the filters 143 is the same as the number of the paths of the multi-path followers 141. In this embodiment, the multi-path voltage follower 141 is a 4-path voltage follower, and a circuit diagram of the 4-path voltage follower is shown in fig. 2. The 4-way voltage follower 141 comprises a first capacitor C1, a resistor R, a second capacitor C2, a first negative feedback amplifier U1, a 4-way analog switch K1 and a second negative feedback amplifier U2 (namely, a second negative feedback amplifier U21, a second negative feedback amplifier U22, a second negative feedback amplifier U23 and a second negative feedback amplifier U24) connected with each way of analog switch; and the closed loop gain of each second negative feedback amplifier is in one-to-one correspondence and identical to the gain set on the ith probe. The 4-path analog switch comprises 4 paths of analog switches K11, K12, K13 and K14 which are connected in parallel. One end of the first capacitor C1, one end of the resistor R, and one end of the second capacitor C2 are connected to the positive input end of the first negative feedback amplifier U1, the other end of the first capacitor C1 is connected to each of the selection switches 12, the other end of the resistor R is grounded, the other end of the second capacitor C2 is grounded, and the negative input end of the first negative feedback amplifier U1 is connected to the output end; the output end of the first negative feedback amplifier U1 is connected to one end of each of the analog switches K11, K12, K13 and K14, the other end of each of the analog switches K11, K12, K13 and K14 is connected to the positive input end of the corresponding second negative feedback amplifier U21, U22, U23 and U24, and the output end of each of the second negative feedback amplifiers U21, U22, U23 and U24 is connected to the input end of each of the amplifiers 142.
In this embodiment, the output voltage of the 4-way voltage follower is the same as the input voltage, that is, the voltage amplification factor of the voltage follower is constantly smaller than and close to 1. The voltage follower has the remarkable characteristics that the input impedance is high, the output impedance is low, and the influence of the turn-off or turn-on quantity of the auxiliary channels on the amplitude of an input signal is small.
Each of the amplifiers 142 employs a broadband amplifier for amplifying the ultrasonic data outputted from each of the 4 voltage followers.
Each of the filters 143 employs a band pass filter for filtering the ultrasonic data amplified by each of the amplifiers 142.
The analog-to-digital converter 144 is used for sequentially and cyclically digitizing the ultrasonic data of the plurality of auxiliary channels.
The programmable device 145 is used for performing multiple-data superposition denoising and data maximization processing on the digitized ultrasonic data. In this embodiment, the programmable device 145 is an FPGA. In this embodiment, the FPGA sets the high voltage value, amplifier gain, sampling rate and resolution of the AD converter, and parameters of the bandpass filter through the SPI interface.
The data processing unit 146 is configured to perform wavelet transform and fourier transform processing on the data processed by the programmable device 145. In this embodiment, the data processing unit 146 employs a DSP. In this embodiment, the FPGA is connected to the DSP through an EMIF interface.
For example, if no auxiliary channel is set for the 1 st probe, the ultrasound acquisition module 14 directly acquires ultrasound data for the 1 st probe. Specifically, only the first path of selection switch is turned on, only the first path of analog switch K11 of the ultrasonic acquisition module 14 keeps on state, and the 2-4 paths of analog switches K12, K13 and K14 are in off state.
If 4 auxiliary channels are set for the 1 st probe, the ultrasonic data fed back by the first path selection switch and the ultrasonic probe is divided into 4 paths of ultrasonic data by the ultrasonic acquisition module 14, and each path of ultrasonic data is acquired by the acquisition channel corresponding to each auxiliary channel. Specifically, the first path selecting switch is turned on, and the ultrasonic wave collecting module 14 selects 4 paths of analog switches K11, K12, K13, and K14 to keep a conducting state, that is, ultrasonic wave data is collected through 4 paths of collection.
Fig. 3 shows a schematic structural diagram of an electronic device 3 according to the present embodiment. As shown in fig. 3, the electronic device 3 includes the electronic switch-type main/auxiliary multi-channel ultrasound acquisition system 1 described above.
In summary, the electronic switch type main/auxiliary multi-channel ultrasonic acquisition system and the electronic device of the present invention realize that a probe signal enters a plurality of amplifiers with different gains at the same time to obtain signals with different gains of the same probe, and can sequentially and circularly rapidly digitize the signals with different gains, thereby avoiding the problem that the signals must be acquired again due to overload of a certain channel signal, and simultaneously realizing that the probes with different auxiliary channel signals from the same position and waveforms are basically similar. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. An electronically switched master/slave multi-channel ultrasound acquisition system, comprising:
n ultrasonic probes, N route selector switches corresponding to N ultrasonic probes; n is a positive integer greater than 1;
the ultrasonic transmitting module is connected with the N-path selection switch and is used for transmitting ultrasonic data;
the ultrasonic acquisition module is respectively connected with the N-way selection switch and the ultrasonic emission module and is used for acquiring the ultrasonic data;
if no auxiliary channel is set for the ith probe, the ultrasonic acquisition module directly acquires ultrasonic data for the ith probe;
if a plurality of auxiliary channels are arranged for the ith probe, the ultrasonic wave acquisition module divides ultrasonic wave data fed back by a path of selection switch and an ultrasonic wave probe into a plurality of paths of ultrasonic wave data, and each path of ultrasonic wave data is acquired by the acquisition channel corresponding to each auxiliary channel;
setting the auxiliary channel for the ith probe means setting different gains for the ith probe and outputting ultrasonic data with different gains through different acquisition channels.
2. The electronically switched master/slave multichannel ultrasound acquisition system according to claim 1, wherein said ultrasound acquisition module comprises a plurality of voltage followers, an amplifier electrically connected to said plurality of voltage followers, a filter electrically connected to said amplifier, an analog-to-digital converter electrically connected to said filter, a programmable device electrically connected to said analog-to-digital converter, and a digital signal processor electrically connected to said programmable device; the number of the amplifiers and the filters is the same as that of the paths of the multi-path followers.
3. The electronically switched master/slave multi-channel ultrasound acquisition system according to claim 2, wherein the programmable device is connected to the digital signal processor through an external memory interface.
4. The electronically switched master/slave multi-channel ultrasound harvesting system of claim 2, wherein the multi-path voltage follower comprises a first capacitor, a resistor, a second capacitor, a first negative feedback amplifier, a multi-path analog switch, and a second negative feedback amplifier connected to each path analog switch; the closed loop gain of each second negative feedback amplifier is in one-to-one correspondence and identical to the gain set on the ith probe; the multi-path analog switch comprises a plurality of paths of analog switches connected in parallel.
5. The electronically switched main/auxiliary multi-channel ultrasound acquisition system according to claim 4, wherein one end of a first capacitor, one end of a resistor, and one end of a second capacitor are connected to the positive input terminal of said first negative feedback amplifier, the other end of the first capacitor is connected to each of the selection switches, the other end of the resistor is grounded, the other end of the second capacitor is grounded, and the negative input terminal of said first negative feedback amplifier is connected to the output terminal; the output end of the first negative feedback amplifier is connected with one end of each analog switch, the other end of each analog switch is connected with the positive input end of the corresponding second negative feedback amplifier, and the output end of each second negative feedback amplifier is connected with the input end of each amplifier.
6. The electronically switched main/auxiliary multi-channel ultrasound acquisition system according to claim 4, wherein if no auxiliary channel is provided for the ith probe, only one of the analog switches of the plurality of analog switches remains on, and the other analog switches remain off.
7. The electronically switched main/auxiliary multi-channel ultrasound acquisition system according to claim 4, wherein if a plurality of auxiliary channels are provided for the ith probe, the analog switches corresponding to the plurality of auxiliary channels among the plurality of analog switches are kept in a conducting state.
8. The electronically switched master/slave multichannel ultrasound acquisition system according to claim 1, characterized in that said ultrasound transmission module comprises: the synchronous pulse emitter and the decoder are connected with the synchronous pulse emitter and the N-path selection switch;
the synchronous pulse transmitter is used for transmitting synchronous pulses according to the sampling frequency;
the decoder is used for selecting a channel from the N-way selector switch and sequentially applying high voltage to the probe on the selected channel at a sampling frequency so as to generate reverse sharp pulses applied to the probe and enable the probe to transmit ultrasonic data.
9. An electronic device, characterized in that: the electronic device comprising an electronically switched primary/secondary multi-channel ultrasound acquisition system as claimed in any one of claims 1 to 8.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995027897A1 (en) * | 1994-04-07 | 1995-10-19 | Reeves R Dale | Ultrasonic flaw detection device |
| CN1975410A (en) * | 2005-11-04 | 2007-06-06 | 通用电气检查技术有限合伙人公司 | Digital log amplifier for ultrasonic testing |
| CN101253401A (en) * | 2005-07-01 | 2008-08-27 | 霍尼韦尔国际公司 | A molded cartridge with 3D hydrodynamic focusing |
| CN102662553A (en) * | 2011-12-31 | 2012-09-12 | 核动力运行研究所 | Nuclear power plant ultrasonic detector software view dynamic segmentation and layout method |
| CN103414482A (en) * | 2013-06-17 | 2013-11-27 | 电子科技大学 | Analog-digital-combined closed loop sidelobe cancellation method and system |
| CN203824966U (en) * | 2014-03-26 | 2014-09-10 | 南京信息工程大学 | Digital ultrasonic flaw detection signal exciting device |
| CN106918643A (en) * | 2017-04-18 | 2017-07-04 | 南通友联数码技术开发有限公司 | A kind of portable general multichannel ultrasonic detection module |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7593481B2 (en) * | 1998-08-31 | 2009-09-22 | Kamilo Feher | CDMA, W-CDMA, 3rd generation interoperable modem format selectable (MFS) systems with GMSK modulated systems |
| GB9818348D0 (en) * | 1998-08-22 | 1998-10-14 | Malvern Instr Ltd | Improvements relating to the measurement of particle size distribution |
-
2017
- 2017-11-10 CN CN201711105512.4A patent/CN109781861B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995027897A1 (en) * | 1994-04-07 | 1995-10-19 | Reeves R Dale | Ultrasonic flaw detection device |
| CN101253401A (en) * | 2005-07-01 | 2008-08-27 | 霍尼韦尔国际公司 | A molded cartridge with 3D hydrodynamic focusing |
| CN1975410A (en) * | 2005-11-04 | 2007-06-06 | 通用电气检查技术有限合伙人公司 | Digital log amplifier for ultrasonic testing |
| CN102662553A (en) * | 2011-12-31 | 2012-09-12 | 核动力运行研究所 | Nuclear power plant ultrasonic detector software view dynamic segmentation and layout method |
| CN103414482A (en) * | 2013-06-17 | 2013-11-27 | 电子科技大学 | Analog-digital-combined closed loop sidelobe cancellation method and system |
| CN203824966U (en) * | 2014-03-26 | 2014-09-10 | 南京信息工程大学 | Digital ultrasonic flaw detection signal exciting device |
| CN106918643A (en) * | 2017-04-18 | 2017-07-04 | 南通友联数码技术开发有限公司 | A kind of portable general multichannel ultrasonic detection module |
Non-Patent Citations (2)
| Title |
|---|
| Combining sum-difference and auxiliary beams for adaptive monopulse in jamming;Rongfeng Li;《Journal of Systems Engineering and Electronics》;20130630;全文 * |
| 八通道可变增益高速数据采集系统;黄新栋等;《集成电路应用》;20090106;第47-49页 * |
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