CN2554628Y - Hand detecting instrument for ripe of watermelon - Google Patents
Hand detecting instrument for ripe of watermelon Download PDFInfo
- Publication number
- CN2554628Y CN2554628Y CN 02266029 CN02266029U CN2554628Y CN 2554628 Y CN2554628 Y CN 2554628Y CN 02266029 CN02266029 CN 02266029 CN 02266029 U CN02266029 U CN 02266029U CN 2554628 Y CN2554628 Y CN 2554628Y
- Authority
- CN
- China
- Prior art keywords
- watermelon
- ripeness
- acoustic wave
- microprocessor
- light emitting
- 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.)
- Expired - Fee Related
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- 241000219109 Citrullus Species 0.000 title claims abstract description 34
- 235000012828 Citrullus lanatus var citroides Nutrition 0.000 title claims abstract description 34
- 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
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- 238000009659 non-destructive testing Methods 0.000 description 2
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- 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
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- 238000010998 test method Methods 0.000 description 1
Images
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model discloses a hand-held watermelon ripeness detector. Two sensors formed of rheomicrophones through a rubber cup and fixed on a supporting frame are connected with a hammer and a spring on the supporting frame through a hinge for the generation of acoustic wave signals, and a signal processing circuit is composed of a differential motion amplifying circuit, a wave filter, a comparator and a microprocessor; a display circuit is composed of a light emitting diode connected with the microprocessor, and a limiting rod is used for controlling the intensity of the acoustic wave signal. The utility model has the advantages that the propagation rate of the acoustic wave decreases with the increasing of the ripeness in the course of the ripeness of the watermelon, and the measuring basis of the utility model lies in the above. Within a certain distance, two microphones are arranged to hit the watermelon, the measurement signals of the two microphones are recorded, and the propagation rate of the acoustic wave is indirectly measured through measuring the propagation time of the acoustic wave signal, thereby the ripeness of the watermelon is determined, and the measurement results are shown by indicating lamps with different colors.
Description
Technical field
The utility model relates to a kind of device of energy Non-Destructive Testing watermelon degree of ripeness, especially a kind of hand-held watermelon degree of ripeness detector.
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 utility model provides a kind of hand-held watermelon degree of ripeness detector, carries out signal analysis by the sonic transmissions process of peening hammer being hit the generation of watermelon surface and realizes Non-Destructive Testing.
The technical solution of the utility model is:
Hand-held watermelon degree of ripeness detector is fixed on the support by leather cup by microphone MIC1, MIC2, peening hammer is connected through the hinge on the support, spring and gag lever post are fixed on the support, two microphone MIC1, MIC2 signal wire are connected to microprocessor through differential amplifier circuit, wave filter, comparer, and microprocessor is connected with three light emitting diodes.
Differential amplifier, wave filter, comparer are the LM324 integrated operational amplifier, and microprocessor is PIC12C508, and light emitting diode is respectively red light emitting diodes, green LED, 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, write down the measuring-signal of two microphones, by the indirect propagation rate of measuring sound wave of the travel-time of measuring acoustic signals, thus the degree of ripeness of definite watermelon, and measurement result is represented by the pilot lamp of different colours.
Description of drawings
Fig. 1 is the outside drawing and the test synoptic diagram of hand-held watermelon degree of ripeness detector.
Fig. 2 is the circuit diagram of hand-held watermelon degree of ripeness detector.
Embodiment
As shown in Figure 1 and Figure 2, hand-held watermelon degree of ripeness detector is fixed on the support 1 by leather cup 2 by microphone MIC1, MIC2, peening hammer 5 connects on the support 1 by hinge 4, spring 3 and gag lever post 6 are fixed on the support 1, two microphone MIC1, MIC2 signal wire are connected to microprocessor through differential amplifier circuit A1, wave filter A2, comparer A3, and microprocessor is connected with three light emitting diode D1, D2, D3.Differential amplifier A 1, wave filter A2, comparer A3 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.
During actual the test, hand-held watermelon degree of ripeness detector is positioned over tested watermelon A top (see figure 1), suitably exert pressure, make leather cup 2 be close to tested watermelon surface,, make its compression spring 3 rotation in the counterclockwise direction of peening hammer 4, when peening hammer 4 is pressed onto strike bar 6, discharge peening hammer 4 it is hit on the watermelon surface, produce sound, collected by microphone MIC1 and MIC2 when voice signal is propagated in watermelon.The signal that microphone MIC1 and MIC2 collect is sent into differential amplifier A1 (referring to Fig. 2) and is amplified, and afterwards by wave filter A2 filtering with further amplify, 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. hand-held watermelon degree of ripeness detector, it is characterized in that: be fixed on the support (1) by leather cup (2) by microphone MIC1, MIC2, peening hammer (5) connects on the support (1) by hinge (4), spring (3) and gag lever post (6) are fixed on the support (1), two microphone MIC1, MIC2 signal wire are connected to microprocessor through differential amplifier circuit (A1), wave filter (A2), comparer (A3), and microprocessor is connected with three light emitting diodes (D1), (D2), (D3).
2. hand-held watermelon degree of ripeness detector according to claim 1, it is characterized in that: differential amplifier (A1), wave 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 |
|---|---|---|---|
| CN 02266029 CN2554628Y (en) | 2002-08-03 | 2002-08-03 | Hand detecting instrument for ripe of watermelon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02266029 CN2554628Y (en) | 2002-08-03 | 2002-08-03 | Hand detecting instrument for ripe of watermelon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2554628Y true CN2554628Y (en) | 2003-06-04 |
Family
ID=33731945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02266029 Expired - Fee Related CN2554628Y (en) | 2002-08-03 | 2002-08-03 | Hand detecting instrument for ripe of watermelon |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2554628Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100507476C (en) * | 2007-03-29 | 2009-07-01 | 扬州大学 | Water melon maturemeter |
| CN105466847A (en) * | 2015-12-05 | 2016-04-06 | 重庆丰之农农业开发有限公司 | Watermelon maturity judging device |
| CN109490725A (en) * | 2018-11-13 | 2019-03-19 | 广西电网有限责任公司电力科学研究院 | The isolator detecting system for having active intelligent recognition function |
-
2002
- 2002-08-03 CN CN 02266029 patent/CN2554628Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100507476C (en) * | 2007-03-29 | 2009-07-01 | 扬州大学 | Water melon maturemeter |
| CN105466847A (en) * | 2015-12-05 | 2016-04-06 | 重庆丰之农农业开发有限公司 | Watermelon maturity judging device |
| CN109490725A (en) * | 2018-11-13 | 2019-03-19 | 广西电网有限责任公司电力科学研究院 | The isolator detecting system for having active intelligent recognition function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |