CN103185744A - Detection device for measuring transmission time of ultrasonic waves in sheet material - Google Patents
Detection device for measuring transmission time of ultrasonic waves in sheet material Download PDFInfo
- Publication number
- CN103185744A CN103185744A CN2011104511040A CN201110451104A CN103185744A CN 103185744 A CN103185744 A CN 103185744A CN 2011104511040 A CN2011104511040 A CN 2011104511040A CN 201110451104 A CN201110451104 A CN 201110451104A CN 103185744 A CN103185744 A CN 103185744A
- Authority
- CN
- China
- Prior art keywords
- ultrasound wave
- sheet material
- circuit
- detection
- sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses a detection device for measuring the transmission time of ultrasonic waves in a sheet material. The device comprises a test board and two groups of ultrasonic wave measuring modules, wherein the test board consists of a fixed seat and a table top; a board table is arranged in front of the fixed seat; and the two groups of ultrasonic wave measuring modules consist of an ultrasonic wave transmitting module and an ultrasonic wave receiving module, and are connected to a computer in parallel after passing through respective corresponding time measuring modules and respective corresponding single chip microcomputers. As proved by factory practice, the requirement of time detection in nondestructive detection of wood can be met by using ultrasonic waves and other detection means, and the detection device has important significance to nondestructive online detection of the strength of artificial plates, and is an extremely important means for increasing the utilization ratio of the artificial plates.
Description
Technical field
The present invention relates to fields of measurement, particularly relate to the pick-up unit in a kind of travel-time of measuring ultrasound wave in sheet material.
Background technology
With the raising of timber demand amount, adopt wood-based plate to replace the log sawn timber to become one of effective ways that efficiently utilize timber resources.The advantage of wood-based plate is: breadth is big, and is structural good, easy construction; The expansion shrinkage factor is low, dimensionally stable, and material is even than sawn timber, is difficult for strain cracking; Be easy to dipping as the veneer of raw material of artifical plate and various particle, thereby can make various functional processing (as fire-retardant, anticorrosion, nonshrink, wear-resisting etc.); Thickness level and the densimetric fraction applicability of wider range are strong; The brake forming performance is better than sawn timber.The shortcoming of wood-based plate is that glue-line can wear out, and the long-time bearing ability has great importance so wood-based plate intensity be can't harm online detection, also is means of crucial importance that improve the wood-based plate utilization factor.Timber detects inconvenience in the prior art, and the defective that detection efficiency is low at present, does not also have the online real-time checkout equipment of timber mechanics intensity in China.
Summary of the invention
Technical matters to be solved by this invention provides a kind of sheet material lossless detection method and device, and solve the existing timber of prior art and detect inconvenience, the defective that detection efficiency is low, and can carry out the division of grade to its detected sheet material.
Principle of work:
According to " through transmission technique " or be transmission beam method, namely with transmitting transducer emission pulsed ultrasonic wave, allow ultrasound wave in the timber that detects, propagate, received by receiving transducer then.The ultrasonic signal that is received is converted into electric signal, carries out sending in the single-chip microcomputer after signal is handled through the ultrasound wave receiving circuit again, can calculate the time of ultrasound wave in sheet material, in basis
V
Speed=L/T (1)
The length of L one sheet material in the formula (1)
The travel-time of T one ultrasound wave in sheet material
V
SpeedThe velocity of propagation of one ultrasound wave in sheet material
Ev=ρ V
Speed 2, (2)
The Ev one sheet material dynamic modulus of elasticity in the formula (2)
ρ one sheet material average density
ρ=M/V
Body(3)
The quality of M one sheet material in the formula (3)
V
BodyThe volume of one sheet material
V
Body=L*W*H (4)
The length of L one sheet material in the formula (4)
The width of W one sheet material
The thickness of H one sheet material
Draw the dynamic modulus of elasticity of sheet material according to (1), (2), (3), (4):
Again because the positive correlation of the mechanical strength of elastic modulus and sheet material is being divided different plates corresponding grade.
For the ultrasound wave in achieving the above object penetrates the detection of sheet material time, the present invention is achieved through the following technical solutions:
The invention discloses the pick-up unit in a kind of travel-time of measuring ultrasound wave in sheet material, this device comprises:
By the test board that holder and table top constitute, the holder front is provided with table top;
Two groups of ultrasonic measurement modules being formed by ultrasound wave transmitter module and ultrasound wave receiver module, behind time corresponding measurement module and each self-corresponding single-chip microcomputer separately, the parallel computing machine that is connected to.
In said apparatus, described ultrasound wave transmitter module comprises ultrasound wave emission sensor and ultrasonic transmit circuit;
Described ultrasound wave receiver module comprises the ultrasound wave receiving sensor and by high-pass filtering circuit, amplifying circuit, resonator, filter and amplifying circuit, full-wave rectifying circuit, thresholding comparator circuit, the ultrasound wave receiving circuit that the Darlington transistor driving circuit connects to form successively.
In said apparatus, ultrasound wave emission sensor and ultrasound wave receiving sensor in the group are installed in the both sides of sheet material on the Width, and are located along the same line;
The sensor of the same type between group is installed in the both sides of sheet material on the vertical width direction, and is located along the same line.
In said apparatus, described ultrasonic sensor is by by in the push-pull device at fixed of air cylinder driven and be built-in with in the holder of spring fixing.
Therefore, the pick-up unit in a kind of among the present invention measures ultrasound wave in sheet material travel-time, can realize utilizing ultrasound wave and other detection meanss realize in the Non-Destructive Testing of timber to the requirement of time detecting, wood-based plate intensity being can't harm online detection have great importance, also is means of crucial importance that improve the wood-based plate utilization factor.
Description of drawings
Fig. 1 is the system chart of the sheet material lossless detection method in the embodiment of the invention;
Fig. 2 is the sensor installation site synoptic diagram of the pick-up unit in the measurement ultrasound wave travel-time in sheet material in the embodiment of the invention;
Fig. 3 is the synoptic diagram of the measurement ultrasound wave pick-up unit in travel-time in sheet material in the embodiment of the invention;
Fig. 4 is ultrasonic transmit circuit and the receiving circuit figure in the embodiment of the invention.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the drawings and specific embodiments.
The specific implementation of the device of sheet material Non-Destructive Testing is provided in the embodiment of the invention, and Fig. 1 is the system chart of the sheet material lossless detection method in the embodiment of the invention, as shown in Figure 1, comprises the following aspects:
1. the device 101 that detects of sheet metal thickness is used for the thickness of sheet material measurement.The measurement of thickness mainly is the subtle change amount of measuring thickness, and each batch thickness of timber in factory is all roughly the same, can be expressed as (W+ Δ w).At first this standard volume is made as W, only need to measure the variation delta w (Δ w has positive and negative branch) of each piece timber and standard value, by the fixing distance of given a pair of displacement transducer, when thickness changes, the amount of compressing into of displacement transducer changes, by signal conditioning circuit, signal is adopted in the controller, thereby carried out THICKNESS CALCULATION.
2. the device 102 of sheet material length detection.In measurement of length, when system can travel forward by sheet material and the friction force of rotary encoder come the motion of driven rotary scrambler, the number of turns of driven rotary scrambler motion obtains the length of sheet material when walking by sheet material measurement.The output of impulse output circuit and phase discriminator inserts after long line transmission in the counting mouth and numeral mouth of data collecting card.Can draw the length of sheet material by the pulse number multiplication by constants of remembering.Constant=(with the girth of the rotary encoder of sheet material touch scrolling)/rotary encoder yardage wherein.
3. after the long end of thickness measuring and survey, arrival is surveyed wide, the static measurement platform of check weighing and velocity of wave, and comprising apparatus for measuring quality 103, width of measuring device 104 and time measurement device 105.The present invention considers the correlative factors such as performance of stressed and LOAD CELLS of objective condition, the rack section of industry spot, adopted the mode of static measurement, after sheet material arrives, behind the static measurement platform, send signal by photoelectric sensor, begin the weighing-up wave of sampling.Repeatedly measure and average to improve the precision of measurement.Because the signal of LOAD CELLS collection is current signal, thus through long line transmission back direct send into after by electric current time variant voltage modulate circuit with data collecting card that host computer links to each other in carry out the collection of data.
4. after weight measurement finishes, the measurement of beginning velocity of wave.Wherein, velocity of wave is measured and is comprised sheet material width of measuring device 104 and the measurement mechanism in the hyperacoustic travel-time on Width 105 again.
With the similar mode of thickness measure, the measurement of width also is the subtle change amount of measuring width.By the fixing distance of given a pair of displacement transducer, when width changed, the amount of compressing into of displacement transducer changed.The output signal of displacement transducer inserts single-chip microcomputer after by signal conditioning circuit.
Wherein, time measurement device comprises: by the test board that holder and table top constitute, the holder front is provided with table top; Two groups of ultrasonic measurement modules being formed by ultrasound wave transmitter module and ultrasound wave receiver module, behind time corresponding measurement module and each self-corresponding single-chip microcomputer separately, the parallel computing machine that is connected to.
Wherein, the ultrasound wave transmitter module comprises ultrasound wave emission sensor and ultrasonic transmit circuit again; The ultrasound wave receiver module comprises the ultrasound wave receiving sensor again and by high-pass filtering circuit, amplifying circuit, resonator, filter and amplifying circuit, full-wave rectifying circuit, thresholding comparator circuit, the ultrasound wave receiving circuit that the Darlington transistor driving circuit connects to form successively.
Fig. 2 is the sensor installation site synoptic diagram of the pick-up unit in the measurement ultrasound wave travel-time in sheet material in the embodiment of the invention, as described in Figure 2, ultrasound wave emission sensor and ultrasound wave receiving sensor in the group are installed in the both sides of sheet material on the Width, and are located along the same line; The sensor of the same type between group is installed in the both sides of sheet material on the vertical width direction, and is located along the same line.
Fig. 3 is the synoptic diagram of the measurement ultrasound wave pick-up unit in travel-time in sheet material in the embodiment of the invention, as described in Figure 3, specifically, after single-chip microcomputer receives the ultrasonic measuring signal of transmission of host computer, send pulse signal to the ultrasound wave transtation mission circuit, and start-up time, measurement module picked up counting.The pulse signal that sends sends ultrasound wave through excitation ultrasonic sensor behind the ultrasonic transmit circuit, penetrating sheet material is received behind the signal through ultrasound wave receiving circuit conditioned signal by the ultrasonic sensor of the other end, produce edge signal, make the time measurement module stop timing.Single-chip microcomputer is by reading the time data of timing chip, and simultaneously according to before the width data measured, the data of its measurement and the velocity amplitude that calculates are returned to computing machine.
5. the evaluation unit 106 that comprises data acquisition unit and data processing unit.Among the present invention, data acquisition unit is data collecting card, and data processing unit is host computer.Host computer carries out computing according to the data collecting card data that collect and the several data that processing obtains.According to the elastic modulus that draws sheet material of above-mentioned principle to carry out grade classification.
6. the method in the embodiment of the invention also further comprises display unit 107, be used for to show the measurement result of each measurement mechanism, and the sheet material elastic modulus that calculates according to measurement result and the grade situation of sheet material.
Therefore, the pick-up unit in a kind of among the present invention measures ultrasound wave in sheet material travel-time, can realize utilizing ultrasound wave and other detection meanss realize in the Non-Destructive Testing of timber to the requirement of time detecting, wood-based plate intensity being can't harm online detection have great importance, also is means of crucial importance that improve the wood-based plate utilization factor.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (3)
1. the pick-up unit in travel-time of measuring ultrasound wave in sheet material is characterized in that this device comprises:
By the test board that holder and table top constitute, the holder front is provided with table top;
Two groups of ultrasonic measurement modules being formed by ultrasound wave transmitter module and ultrasound wave receiver module, behind time corresponding measurement module and each self-corresponding single-chip microcomputer separately, the parallel computing machine that is connected to.
2. device according to claim 1 is characterized in that,
Described ultrasound wave transmitter module comprises ultrasound wave emission sensor and ultrasonic transmit circuit;
Described ultrasound wave receiver module comprises the ultrasound wave receiving sensor and by high-pass filtering circuit, amplifying circuit, resonator, filter and amplifying circuit, full-wave rectifying circuit, thresholding comparator circuit, the ultrasound wave receiving circuit that the Darlington transistor driving circuit connects to form successively.
3. device according to claim 2 is characterized in that,
Ultrasound wave emission sensor and ultrasound wave receiving sensor in the group are installed in the both sides of sheet material on the Width, and are located along the same line;
The sensor of the same type between group is installed in the both sides of sheet material on the vertical width direction, and is located along the same line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104511040A CN103185744A (en) | 2011-12-30 | 2011-12-30 | Detection device for measuring transmission time of ultrasonic waves in sheet material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104511040A CN103185744A (en) | 2011-12-30 | 2011-12-30 | Detection device for measuring transmission time of ultrasonic waves in sheet material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103185744A true CN103185744A (en) | 2013-07-03 |
Family
ID=48677023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104511040A Pending CN103185744A (en) | 2011-12-30 | 2011-12-30 | Detection device for measuring transmission time of ultrasonic waves in sheet material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103185744A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108168622A (en) * | 2018-03-16 | 2018-06-15 | 桂林师范高等专科学校 | Lumber quality detecting system |
| CN111164421A (en) * | 2017-10-04 | 2020-05-15 | 上田日本无线株式会社 | Ultrasonic transmitter, propagation time measuring device, gas concentration measuring device, propagation time measuring program, and propagation time measuring method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1169777A (en) * | 1994-12-13 | 1998-01-07 | B·F·谷德里奇公司 | Contaminant detection system |
| CN1298101A (en) * | 2000-12-29 | 2001-06-06 | 武汉大学 | Ultrasonic vacuum degree detection method and detector for vacuum breaker |
| CN101544306A (en) * | 2009-04-10 | 2009-09-30 | 上海市东方海事工程技术有限公司 | System and method for intelligently controlling electronic weighing type coal feeder |
-
2011
- 2011-12-30 CN CN2011104511040A patent/CN103185744A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1169777A (en) * | 1994-12-13 | 1998-01-07 | B·F·谷德里奇公司 | Contaminant detection system |
| CN1298101A (en) * | 2000-12-29 | 2001-06-06 | 武汉大学 | Ultrasonic vacuum degree detection method and detector for vacuum breaker |
| CN101544306A (en) * | 2009-04-10 | 2009-09-30 | 上海市东方海事工程技术有限公司 | System and method for intelligently controlling electronic weighing type coal feeder |
Non-Patent Citations (3)
| Title |
|---|
| 孙达根: "基于单片机和CPLD的超声波人造板强度检测", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》, no. 11, 15 November 2011 (2011-11-15) * |
| 肖江 等: "基于DSP的木材强度超声波检测系统研究", 《林业机械与木工设备》, vol. 36, no. 1, 31 January 2008 (2008-01-31) * |
| 蒋志峰 等: "复合材料孔隙含量超声检测系统的设计研究", 《玻璃钢/复合材料》, no. 4, 31 December 2009 (2009-12-31), pages 27 - 31 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111164421A (en) * | 2017-10-04 | 2020-05-15 | 上田日本无线株式会社 | Ultrasonic transmitter, propagation time measuring device, gas concentration measuring device, propagation time measuring program, and propagation time measuring method |
| US11499939B2 (en) | 2017-10-04 | 2022-11-15 | Ueda Japan Radio Co., Ltd. | Ultrasonic wave transmitter, propagation time measurement device, gas concentration measurement device, propagation time measurement program, and propagation time measurement method |
| CN108168622A (en) * | 2018-03-16 | 2018-06-15 | 桂林师范高等专科学校 | Lumber quality detecting system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103185554A (en) | Device for detecting thickness of board | |
| CN105158339B (en) | The test system and test method of longitudinal and shear wave Integral ultrasonic probe, elasticity modulus and distribution | |
| CN203535713U (en) | Device for ultrasonic detection of tapes and overlapping in banknote processing | |
| CN202734772U (en) | Device for detecting the thickness of plates | |
| CN104502455A (en) | Air coupling ultrasonic automatic detection system | |
| CN105004791A (en) | Air coupled lamb wave ultrasonic testing D imaging method applied to composite laminate defects and device thereof | |
| CN103234443A (en) | Wide-range magnetostrictive displacement sensor measuring device and method | |
| CN103308012A (en) | Concrete pavement thickness detection system and detection method | |
| CN106124625B (en) | Air Coupling ultrasonic wave high energy detection method and system | |
| CN202974234U (en) | Length detection apparatus for sheet material | |
| CN103185745A (en) | Device for board length detection | |
| CN101706477A (en) | Detector and method based on electromagnetic ultrasonic oblique incidence body wave | |
| CN103185744A (en) | Detection device for measuring transmission time of ultrasonic waves in sheet material | |
| CN105675720A (en) | Fruit firmness information online collecting system and method | |
| CN202720213U (en) | Detection device for measuring transmission time of ultrasonic waves in plate | |
| CN105181491A (en) | Method and device for testing impact stress waves of material | |
| CN103185553A (en) | Device for detecting width of board | |
| CN103185632A (en) | Device for detecting weight of board | |
| CN203148898U (en) | Ultrasonic guided-wave detecting system for steel wire rope | |
| CN202870038U (en) | Device for detecting weight of plate | |
| CN108562528A (en) | A kind of composite material porosity evaluation method based on acoustic emission | |
| CN201269745Y (en) | Intelligentized pipe laser length-measuring apparatus | |
| CN202533055U (en) | Plate width detection device | |
| CN202362112U (en) | Detonation sensor testing arrangement | |
| CN203241319U (en) | Frequency-method testing device for elastic modulus of rectangular dimension stock |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130703 |