CN104820023B

CN104820023B - The ultrasonic phased array detection means of the convertible array format of low-power consumption

Info

Publication number: CN104820023B
Application number: CN201510180902.2A
Authority: CN
Inventors: 杨涛; 张华�; 皮明; 陈曦
Original assignee: Southwest University of Science and Technology
Current assignee: Southwest University of Science and Technology
Priority date: 2015-04-16
Filing date: 2015-04-16
Publication date: 2017-12-19
Anticipated expiration: 2035-04-16
Also published as: CN104820023A

Abstract

The invention provides a kind of low-power consumption can real-time transform array pattern ultrasonic phased array detection means.Whole system includes：FPGA control modules, square MEMS ultrasonic sensings array, pci bus, signal processing module, array format and frequency-selecting module.FPGA module includes pulse control unit and Beamsteering Unit, and square MEMS ultrasonic sensings array forms horizontally-arranged square phased array equal and constant gap with tandem number by many individual MEMS sonacs, the arrangement of array simultaneously is by row's emission array and row's receiving array cross arrangement, each transmitting array element has independent pulse excitation passage, and each array element that receives has independent echo reception passage；Signal processing module is made up of the amplifying unit and filter unit equal with receiving array element quantity；Array format and frequency-selecting module are made up of push-button array, some a variety of different array patterns and different ultrasonic frequencies can be represented respectively to adapt to different detection cases, so as to simplify the hardware configuration of array, it is more suitable for applying in the various detections of a variety of particular surroundings robots progress.

Description

The ultrasonic phased array detection means of the convertible array format of low-power consumption

Technical field

The present invention relates to ultrasonic phase array detection identification technology field, and in particular to a kind of array format and ultrasonic frequency The low-power consumption ultrasonic phase array that can be changed by real-time selection, can easily carry out the change of array pattern and ultrasonic frequency, It can be applied to select the ultrasound detection carried in the particular surroundings robot of different array formats according to different working environments Device.

Background technology

Ultrasound examination occupies increasingly consequence as a kind of Non-Destructive Testing in detection field, and it is not applied only to Military field, aerospace field, medical field, be also more and more applied to now industrial flaw detection, particular surroundings detection, The fields such as gesture identification.As industrial environment becomes increasingly complex, for wanting for the precision of ultrasonic phase array, accuracy and resolution ratio Also more and more higher is sought, but the phased array of different patterns has the advantages of respective in terms of precision, accuracy and resolution ratio, adapts to Different situations.

Traditional phased array typically has square formation, circle battle array, meter Zi Zhen, linear array, triangle battle array, quincunx battle array etc., each of which There are shortcoming and advantage, suitable for different scenes.General each of which may be only available for several occasions of fixation, if being used for it He just has the defects of very big at occasion, goes to detect so may need to change different arrays in different occasions, so as to cause to make With very inconvenient, hardware cost is greatly increased.Meanwhile transmitting at this stage and the ultrasonic wave ring of receiving array mostly use simulation Energy device, thus needs the signal processing circuit of complexity, while hardware cost is increased the power consumption of whole system can also increased Greatly.Therefore, it is possible to be combined into the detection that different conventional array formats carries out low-power consumption alterable array on minimum hardware Into existing ultrasonic phase array problem encountered.

The content of the invention

It is an object of the invention to provide a kind of low-power consumption can real-time selection array format ultrasonic detection device.

The object of the present invention is achieved like this：By using identical quantity analog sensor form emission array and The receiving array of digital sensor composition intersects is arranged in formation ultrasound detection phased array on one piece of surface-mounted integrated circuit at equal intervals, The spacing that a discharge therein is penetrated between the row of the array element one interlaced arrangement of reception array element and each array element is equal, transmitting and reception battle array The row that member each forms is equal.Each transmitting array element has independent pulse-triggered passage, and each array element that receives has independence Echo signal processing passage.Each reception array element in array is connected with a filtration module in signal processing module, Amplification and A/D change-over circuits are eliminated so as to simplify the process circuit of receives echo-signal, the signal after processing is directly fed to Velocity of wave control unit in FPGA carries out subsequent treatment.Different array patterns and ultrasonic wave frequency are selected by push-button array simultaneously Rate, after FPGA pulse control unit detects the signal of input, the pulse of frequency according to needed for producing the program finished Trigger corresponding array element and be combined into required array pattern, while the ultrasonic wave of frequency required for generation.

The push-button array that the present invention uses, which can be integrated in FPGA on one piece of circuit board, reduces volume, and sensor permutation It can be connected by bus with FPGA, facilitate push-button array to visit and reach farther distance.

Different frequencies can not only be selected by the selection of push-button array, can also will be launched according to actually detected needs Array and receiving array are chosen to different or identical array format.

Technical scheme more than can be seen that because the present invention is using digital MEMS sensor reception permutation letter Change signal processing circuit and greatlyd save processing time and hardware cost, reduce power consumption, while by the selection of button, It need not re-replace and may be selected by different array patterns on the basis of hardware, greatly facilitate the selection of array, reduce Use cost.

Brief description of the drawings

By referring to accompanying drawing be more fully described the present invention exemplary embodiment, above and other aspect of the invention and Advantage will become more easily clear, in the accompanying drawings：

Fig. 1 is the phased array arrangement architecture schematic diagram of the present invention；

Fig. 2 is the systematic schematic diagram of detection means.

Embodiment

Hereinafter, the present invention is more fully described now with reference to accompanying drawing, various embodiments is shown in the drawings.So And the present invention can be implemented in many different forms, and it should not be construed as limited to embodiment set forth herein.Phase Instead, there is provided these embodiments make it that the disclosure will be thorough and complete, and fully convey the scope of the present invention to ability Field technique personnel.

Hereinafter, the exemplary embodiment of the present invention is more fully described with reference to the accompanying drawings.

Specific description and explanation are done to the present invention below in conjunction with the accompanying drawings, parameter is not formed to this hair used by embodiment Bright restriction.

The present invention one 8 × 8 square ultrasonic array being made up of 64 MEMS sensors of design are as shown in figure 1, this battle array Row are received by row's emission array and row's receiving array cross arrangement, the expression transmitting array element of solid black, hollow expression Array element, array element are all welded on surface-mounted integrated circuit, then the square array of emission array and receiving array all for 8 × 4.

With reference to Fig. 2, each array element of launching is connected by a mouth after programmable amplifier and filter unit directly with FPGA, And each receive array element and be first connected with a filter unit of signal processing module and be connected on FPGA.Each array element that receives exists Receive to be amplified after echo-signal and change with A/D and signal is directly filtered processing, the signal after processing The pulse control unit for being directly fed to FPGA is handled for showing testing result, so both saved signal processing time while or Signal processing circuit is become simpler, reduce hardware cost.Each button of 4 × 4 push-button arrays is respectively with FPGA's One mouth is connected, and so each button represents different input signals.When FPGA pulse control unit collects different key Input signal when, corresponding processing is made according to the program write inside FPGA, it is possible to produce synchronizing frequency Corresponding amplifier is connected in the port that trigger pulse is output to different control array element, drives the array element accordingly connected, produces phase The ultrasonic wave of frequency is answered, material is thus formed required array pattern and ultrasonic frequency, so that same hardware configuration Can aspect change dissolve many kinds of array patterns and ultrasonic frequency, greatly simplified hardware configuration.Pass through FPGA programs Delay process ultrasonic wave caused by corresponding array element can be made to enter the control that phase is realized in horizontal deflection, so as to carry out ultrasonic scanning Detection.Finally, the result of Scanning Detction can be given to display screen by bus or PC is shown.

The present invention is described in detail above, small volume of the invention, simple in construction, cost is low, and small power consumption can To go out most array patterns with minimum hardware combinations, it is particularly suitable for the detection of varying environment situation.

Embodiments of the invention are the foregoing is only, are not intended to limit the invention.The present invention can have various conjunctions Suitable change and change.Any modification, equivalent substitution and improvements made within the spirit and principles of the invention etc., all should Within protection scope of the present invention.

Claims

A kind of 1. ultrasonic phased array detection means of the convertible array format of low-power consumption, it is characterised in that：Described device includes MEMS ultrasonic sensings phased array, array format and ultrasonic frequency selecting module, signal processing module, FPGA control modules；Institute State array format and ultrasonic frequency selecting module is used to select array format and it is expected ultrasonic frequency, and signal is transmitted to FPGA；MEMS sonacs composition N × N phased array forms square, circular, rice font or line for triggering corresponding array element The corresponding array pattern of type；

The square array for forming N × N by several MEMS sonacs includes what is be made up of analog MEMS sonac The receiving array of emission array and the formed objects being made up of digital MEMS sonacs, a discharge therein penetrate the row of array element one The spacing received between the interlaced arrangement of array element and each array element is equal, launches equal with the row that reception array element each forms；

Each transmitting array element has independent pulse-triggered passage, and the method that detection means is combined using push-button array and FPGA is entered The selection of a variety of array formats of row and ultrasonic frequency.
2. the ultrasonic phased array detection means of the convertible array format of low-power consumption as claimed in claim 1, it is characterised in that Receiving array is by digital ultrasound sensor group into each receive connects signal processing module respectively behind array element.
3. the ultrasonic phased array detection means of the convertible array format of low-power consumption as claimed in claim 1, it is characterised in that The FPGA control modules include pulse control unit and Beamsteering Unit.
4. the ultrasonic phased array detection means of the convertible array format of low-power consumption as claimed in claim 2, it is characterised in that The signal processing module is made up of the amplifying unit and filter unit equal with receiving array element quantity；Array format and frequency choosing Module is selected to be made up of push-button array.