CN1395097A - Portable watermelon tester apparatus - Google Patents
Portable watermelon tester apparatus Download PDFInfo
- Publication number
- CN1395097A CN1395097A CN 02136378 CN02136378A CN1395097A CN 1395097 A CN1395097 A CN 1395097A CN 02136378 CN02136378 CN 02136378 CN 02136378 A CN02136378 A CN 02136378A CN 1395097 A CN1395097 A CN 1395097A
- Authority
- CN
- China
- Prior art keywords
- watermelon
- microprocessor
- microphones
- spring
- sound wave
- 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.)
- Granted
Links
- 241000219109 Citrullus Species 0.000 title claims abstract description 34
- 235000012828 Citrullus lanatus var citroides Nutrition 0.000 title claims abstract description 34
- 239000010985 leather Substances 0.000 claims abstract description 5
- 102000008482 12E7 Antigen Human genes 0.000 claims description 8
- 108010020567 12E7 Antigen Proteins 0.000 claims description 8
- 101000893549 Homo sapiens Growth/differentiation factor 15 Proteins 0.000 claims description 8
- 101000692878 Homo sapiens Regulator of MON1-CCZ1 complex Proteins 0.000 claims description 8
- 102100026436 Regulator of MON1-CCZ1 complex Human genes 0.000 claims description 8
- 241000519996 Teucrium chamaedrys Species 0.000 claims description 8
- 238000000034 method Methods 0.000 abstract description 9
- 238000012360 testing method Methods 0.000 abstract description 3
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000005070 ripening Effects 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 5
- 239000003086 colorant Substances 0.000 description 3
- 238000009659 non-destructive testing Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 244000241257 Cucumis melo Species 0.000 description 1
- 235000015510 Cucumis melo subsp melo Nutrition 0.000 description 1
- FJJCIZWZNKZHII-UHFFFAOYSA-N [4,6-bis(cyanoamino)-1,3,5-triazin-2-yl]cyanamide Chemical compound N#CNC1=NC(NC#N)=NC(NC#N)=N1 FJJCIZWZNKZHII-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000012850 discrimination method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000010152 pollination Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invented portable tester for testing watermelon includes the two miniature microphones, which through the leather cups are fixed on the bracket. The drive hammer trough the hinge is installed on the bracket. The one end of the spring is fixed on the bracket, and the stop rod is on the bar of the drive hammber above the spring. The signal wire through the differential amplifier, the filter and the comparator to the microprocessor. In the ripening process of watermelon, the propagation speed of the sound wave is decreased as increase of the maturity. This is the reference of the invention. The two microphones are setup at certain distance. Slapping watermelon generates the sound wave. The two microphones record the sound wave. The propagation speed is calculated from the time difference of the two microphones so as to determine the maturity.
Description
Technical field
The present invention relates to a kind of device of energy Non-Destructive Testing watermelon degree of ripeness, especially a kind of portable watermelon tester apparatus.
Background technology
The discrimination method of watermelon degree of ripeness is a lot, and modal is to beat the melon body with hand, judges its degree of ripeness by listening, and this method depends on operator's experience fully.In order to obtain a kind of comparatively objective, easy method of testing, carried out some researchs both at home and abroad:
Labeling acts:, over time, survey sample with destructive method to doing same label with the watermelon of a collection of artificial pollination.Obviously this is a kind of detection method that diminishes.
Unit weight method: judge its degree of ripeness by measuring the watermelon volume and weight.These class methods all are to use the volume and weight that watermelon is measured in the watermelon draining respectively, and the result of measurement or by pointer indication perhaps determines by tabling look-up.The method operation is comparatively complicated, is not suitable for the field and uses.
Resistance method: the degree of ripeness of judging watermelon by the resistivity of measuring watermelon.This also is a kind of detection method that diminishes.
Electronic equipment is distinguished method: this class methods example is more, all is the resonant frequency of measuring watermelon basically.Generally all collect sound by microphone, after operations such as amplifications, filtering, or computing machine provides measurement result by Computer Processing, or shows that with pointer instrument or loudspeaker export, and still needs artificial judgment.With regard to practicality, the former volume is excessive, the cost height, and the latter still has certain requirement to the operator.
Summary of the invention
The invention provides a kind of by impacting the portable watermelon tester apparatus that the watermelon surface produces sound wave and realizes Non-Destructive Testing watermelon degree of ripeness by the processing acoustic signals.
Technical scheme of the present invention is: it comprises two midget microphone MIC1, MIC2, be fixed on the support by leather cup, peening hammer is rack-mount by hinge, spring one end is fixed on the support, on the strike hammer stem above the spring, arresting lever is arranged, midget microphone MIC1, MIC2 signal wire are connected to microprocessor through differential amplifier, active filter, comparer, and microprocessor is connected with the light emitting diode of three different colours.
Differential amplifier, active filter, comparer are the LM324 integrated operational amplifier, and microprocessor is PIC12C508, and light emitting diode D1 is red light emitting diodes, D2 green LED, D3 yellow light-emitting diode.
The invention has the beneficial effects as follows: in the maturation of watermelon, the propagation rate of sound wave can reduce along with the increase of degree of ripeness, beasurement base of the present invention that Here it is.In certain distance, arrange two microphones, impact watermelon and produce sound wave, write down the measuring-signal of two microphones, measure the propagation rate of sound wave indirectly by the travel-time of measuring acoustic signals, realize Non-Destructive Testing, thereby determine the degree of ripeness of watermelon, measurement result is represented by the pilot lamp of different colours.Can obtain the propagation rate of sound wave, thereby determine the degree of ripeness of watermelon.
Description of drawings
Fig. 1 is the outside drawing and the test synoptic diagram of portable watermelon tester apparatus.
Fig. 2 is the circuit diagram of portable watermelon tester apparatus.
Embodiment
As shown in Figure 1, two midget microphone MIC1, MIC2, be fixed on the support by leather cup, peening hammer is installed on the support 2 by hinge, spring one end is fixed on the support 2, on the strike hammer stem above the spring arresting lever is arranged, midget microphone MIC1, MIC2 signal wire are connected to microprocessor through differential amplifier, active filter, comparer, and microprocessor is connected with the light emitting diode of three different colours.So just formed portable watermelon tester apparatus.
When depositing at ordinary times,, when being pressed onto to a certain degree, arresting lever 1 is inserted support, the strike hammer stem is hidden in the support under the acting in conjunction of spring 4 and arresting lever 1 rotation in the counterclockwise direction of peening hammer 6.During actual the test, portable watermelon tester apparatus is positioned over tested watermelon A top (see figure 1), suitably exert pressure, make leather cup 3 be close to tested watermelon A surface, extract the arresting lever 1 that is contained on the support 2, discharge peening hammer 4 it is hit on the watermelon surface, produce sound, collected by midget microphone MIC1 and MIC2 when voice signal is propagated in watermelon.The signal that midget microphone MIC1 and MIC2 collect is sent into differential amplifier A1 (see figure 2) and is amplified the back by active filter A2 filtering with further amplify, and the signal after the amplification is input to comparer A3, with a given voltage ratio, convert square-wave signal to.Because it is variant that sound wave arrives time of two MIC, once hit finish after, can obtain two square waves at the voltage comparator output terminal, square-wave signal is input to microprocessor PIC12C508, finishes measurement to two square wave front edge mistimings by this processor.Because the distance between two MIC is certain, the speed in the time of therefore should can representing sound wave to pass through two MIC the mistiming, and the latter can be reflected the degree of ripeness of watermelon.So also just measured the degree of ripeness of watermelon indirectly.Measurement result can be represented underdone, ripe, overdone respectively by lighting of light emitting diode D1 (redness), D2 (green), D3 (yellow).
Claims (2)
1. portable watermelon tester apparatus, it is characterized in that: it comprises two midget microphone MIC1, MIC2, be fixed on the support (2) by leather cup (3), peening hammer (6) is installed on the support (2) by hinge (5), spring one end is fixed on the support (2), arresting lever (1) is arranged on the strike hammer stem above the spring, midget microphone MIC1, MIC2 signal wire are connected to microprocessor through differential amplifier (A1), active filter (A2), comparer (A3), and microprocessor is connected with three light emitting diodes (D1), (D2), (D3).
2. portable watermelon tester apparatus according to claim 1, it is characterized in that: differential amplifier (A1), active filter (A2), comparer (A3) are the LM324 integrated operational amplifier, microprocessor is PIC12C508, and light emitting diode (D1) is red light emitting diodes, (D2) green LED, (D3) yellow light-emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021363781A CN1180253C (en) | 2002-08-03 | 2002-08-03 | Portable watermelon tester apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021363781A CN1180253C (en) | 2002-08-03 | 2002-08-03 | Portable watermelon tester apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1395097A true CN1395097A (en) | 2003-02-05 |
| CN1180253C CN1180253C (en) | 2004-12-15 |
Family
ID=4748624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021363781A Expired - Fee Related CN1180253C (en) | 2002-08-03 | 2002-08-03 | Portable watermelon tester apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1180253C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101609068B (en) * | 2008-06-19 | 2011-11-09 | 林俊明 | Novel acoustic nondestructive test method |
| CN104062357A (en) * | 2014-05-23 | 2014-09-24 | 浙江大学 | Multi-point synchronous measurement device for watermelon knocking vibration |
| CN107589175A (en) * | 2016-07-09 | 2018-01-16 | 石河子大学 | A kind of "Hami" melon maturity acoustics the cannot-harm-detection device |
-
2002
- 2002-08-03 CN CNB021363781A patent/CN1180253C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101609068B (en) * | 2008-06-19 | 2011-11-09 | 林俊明 | Novel acoustic nondestructive test method |
| CN104062357A (en) * | 2014-05-23 | 2014-09-24 | 浙江大学 | Multi-point synchronous measurement device for watermelon knocking vibration |
| CN107589175A (en) * | 2016-07-09 | 2018-01-16 | 石河子大学 | A kind of "Hami" melon maturity acoustics the cannot-harm-detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1180253C (en) | 2004-12-15 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |