CN103234446B - Lawn height detection device based on piezoelectric sensor - Google Patents
Lawn height detection device based on piezoelectric sensor Download PDFInfo
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- CN103234446B CN103234446B CN201310159682.6A CN201310159682A CN103234446B CN 103234446 B CN103234446 B CN 103234446B CN 201310159682 A CN201310159682 A CN 201310159682A CN 103234446 B CN103234446 B CN 103234446B
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- piezoelectric sensor
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Abstract
The invention discloses a lawn height detection device based on a piezoelectric sensor, which is arranged at the bottom of a mower. The lawn height detection device comprises a housing, an electronic device, a grass scraping rod and a fender, wherein the housing is used for accommodation and installation, a circular hole is formed in the housing, and the piezoelectric sensor used for vibration detection is arranged in the circular hole; the electronic device is installed inside the housing and connected with the piezoelectric sensor, so as to detect and process signals; the grass scraping rod is used for vibration amplification and arranged in front of the housing, and the height of the grass scraping rod is set the same as that of the housing; the electronic device is provided with an amplifying and filtering circuit, a microprocessor and an interface circuit, wherein the microprocessor is connected with the amplifying and filtering circuit, and the interface circuit is connected with the microprocessor; and the fender is arranged between a cutting knife and the housing, and the height of the fender is greater than that of the housing.
Description
Technical field
The present invention relates to a kind of lawn height detection device based on piezoelectric sensor, belong to the technical field of sensor.
Background technology
Along with the raising that people require living environment, in city, the area of turf plant is increasing.Our living environment has not only been beautified on lawn, and becomes an ingredient of CO2-O2 circulation in air.In order to make lawn keep clean and tidy and attractive in appearance always, need regularly to prune lawn.For artificial mode of pruning, be push that trolley type mower is complete on lawn walks one section, the true altitude not for lawn is treated with a certain discrimination, therefore causes the work of mower partial invalidity; Whether now, automatic mower gets more and more, automatic mower adopts random walking manner to carry out turf-mown, does not distinguish lawn height, also do not distinguish to have cut, almost every day random work on lawn always, efficiency is very low.
If can detect lawn height, not only can judge whether that needs are mowed, can also judge whether to have cut, the turf-mown for becoming more meticulous is provided technical foundation by this.
Summary of the invention
The object of the invention is to meet existing technical requirement, improve the efficiency in mowing process, design a kind of lawn height detection device based on piezoelectric sensor, detect the vibration signal that culm pats this device, judge whether the grass on lawn grows tall certain height, the program can be used as the basis for estimation whether mower works, and therefore improves intelligence degree and work efficiency.
The technical solution adopted for the present invention to solve the technical problems is:
Based on the lawn height detection device of piezoelectric sensor, be arranged on the bottom of mower, described bottom arranges the rotary cutting knife of mowing, comprise for the shell held and install, described shell arranges circular port, described circular port arranges the piezoelectric sensor carrying out shock detection, and is arranged on the electronic installation of described enclosure, described electronic installation is connected with described piezoelectric sensor, carries out input and process; Also comprise carry out shake amplify scrape careless bar, described careless bar of scraping is arranged on described shell anterior position, and described careless bar of scraping arranges same height with described shell.
Described electronic installation arranges filtering and amplifying circuit, the microprocessor be connected with described filtering and amplifying circuit, and the interface circuit to be connected with described microprocessor, the signal that described filtering and amplifying circuit is responsible for described piezoelectric sensor exports amplifies and filtering, described microprocessor is responsible for detection and the process of carrying out signal, described interface circuit is used for being connected with external circuit, exportable judged result.
Also comprise the mud guard be arranged between described cutter and described shell, the height of described mud guard is greater than described shell.
Described circular port and piezoelectric sensor arrange at least one group.
Whether implementing good effect of the present invention is: whether the grass that 1, can detect lawn grows to certain altitude, mower can be instructed to work; 2, stable performance, is not afraid of accumulation dust, grass bits and mud etc.
Accompanying drawing explanation
Fig. 1 is the side view of mower;
Fig. 2 is the outside drawing of this device;
Fig. 3 is the outside drawing scraping careless bar;
Fig. 4 is the principles of signal processing block diagram of this device.
Embodiment
Now the invention will be further described by reference to the accompanying drawings:
With reference to Fig. 1-4, based on the lawn height detection device of piezoelectric sensor, being arranged on the bottom of mower 1, for detecting lawn height, may be used for judging whether that needs are mowed, can also be used for judging whether to cut.
The instrument of the mowing of mower 1 is arranged on chassis, is generally rotary cutting knife 4.
Comprise the shell 2 for holding and install, described shell 2 arranges circular port, for arranging the piezoelectric sensor 6 carrying out shock detection.Described piezoelectric sensor 6 is made up of quartz piezoelectric material or ceramic piezoelectric material, vibration signal can be converted to electric signal.
Arrange electronic installation in described shell 2 inside, described electronic installation is connected with described piezoelectric sensor 6, carries out input and process, and the electric signal that described piezoelectric sensor 6 exports is carried out amplification filtering and process.
Described shell 2 anterior position carry out shake amplify scrape careless bar 3, described careless bar 3 of scraping arranges same height with described shell 2.Because grass itself is softer, if under normal conditions mower 1 process time, grass is scraped or beats in the dynamics of described piezoelectric sensor 6 large not, and the signal of described piezoelectric sensor 6 output is very faint, is not enough to judge; And add described careless bar 3 of scraping, can, by the bend forward in advance of the grass on the path of mower 1 process, then beat to described piezoelectric sensor 6 backward, increase impact dynamics, output signal can be detected.
Described electronic installation arranges filtering and amplifying circuit 7, the microprocessor 8 be connected with described filtering and amplifying circuit 7, and the interface circuit 9 be connected with described microprocessor 8.Described filtering and amplifying circuit 7 signal be responsible for described piezoelectric sensor 6 exports amplifies and filtering, described microprocessor 8 is responsible for detection and the process of carrying out signal, determine whether the signal that effective grass impacts, described interface circuit 9 for being connected with external circuit, the judged result of exportable described microprocessor 8.
Between described cutter 4 and described shell 2, arrange mud guard 5, the height of described mud guard 5 is greater than described shell 2.The grass bits kicked up for preventing described cutter 4, the piezoelectric sensor 6 described in mud etc. impact, causes undesired signal, also can keep the clean of described shell 2 simultaneously.
Described circular port and piezoelectric sensor 6 arrange at least one group, and many groups arrange the foundation that sensor can increase judgement, improve the accuracy judged.
In sum, the present invention designs a kind of lawn height detection device based on piezoelectric sensor, detect the vibration signal that culm pats this device, after amplification filtering and process, whether the grass on judgement lawn grows tall certain height, this design can be used as the basis for estimation whether mower works, and can improve intelligence degree and the work efficiency of lawn maintenance.
Claims (2)
1. based on the lawn height detection device of piezoelectric sensor, be arranged on the bottom of mower, described bottom arranges the rotary cutting knife of mowing, it is characterized in that: comprise for the shell held and install, described shell arranges circular port, described circular port arranges the piezoelectric sensor carrying out shock detection, and is arranged on the electronic installation of described enclosure, described electronic installation is connected with described piezoelectric sensor, carries out input and process; Also comprise carry out shake amplify scrape careless bar, described careless bar of scraping is arranged on described shell anterior position, and described careless bar of scraping arranges same height with described shell; Described electronic installation arranges filtering and amplifying circuit; the microprocessor be connected with described filtering and amplifying circuit; and the interface circuit to be connected with described microprocessor; the signal that described filtering and amplifying circuit is responsible for described piezoelectric sensor exports amplifies and filtering; described microprocessor is responsible for detection and the process of carrying out signal; described interface circuit is used for being connected with external circuit, exportable judged result; Also comprise the mud guard be arranged between described cutter and described shell, the height of described mud guard is greater than described shell.
2., as claimed in claim 1 based on the lawn height detection device of piezoelectric sensor, it is characterized in that: described circular port and piezoelectric sensor arrange at least one group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310159682.6A CN103234446B (en) | 2013-05-03 | 2013-05-03 | Lawn height detection device based on piezoelectric sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310159682.6A CN103234446B (en) | 2013-05-03 | 2013-05-03 | Lawn height detection device based on piezoelectric sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103234446A CN103234446A (en) | 2013-08-07 |
| CN103234446B true CN103234446B (en) | 2015-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310159682.6A Expired - Fee Related CN103234446B (en) | 2013-05-03 | 2013-05-03 | Lawn height detection device based on piezoelectric sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103234446B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107027433A (en) * | 2016-02-03 | 2017-08-11 | 苏州宝时得电动工具有限公司 | Hay mover |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5450678A (en) * | 1994-01-27 | 1995-09-19 | Check Signature, Inc. | Grass length measuring device |
| CN101743804A (en) * | 2009-12-29 | 2010-06-23 | 江苏大学 | Grain cleaning loss detection method for combined harvester and device thereof |
| CN203216444U (en) * | 2013-05-03 | 2013-09-25 | 慈溪迈思特电子科技有限公司 | Lawn height detection device based on piezoelectric sensor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011032307A1 (en) * | 2009-09-15 | 2011-03-24 | Lin Xiaodong | Contact sensor for lawns |
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2013
- 2013-05-03 CN CN201310159682.6A patent/CN103234446B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5450678A (en) * | 1994-01-27 | 1995-09-19 | Check Signature, Inc. | Grass length measuring device |
| CN101743804A (en) * | 2009-12-29 | 2010-06-23 | 江苏大学 | Grain cleaning loss detection method for combined harvester and device thereof |
| CN203216444U (en) * | 2013-05-03 | 2013-09-25 | 慈溪迈思特电子科技有限公司 | Lawn height detection device based on piezoelectric sensor |
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| CN103234446A (en) | 2013-08-07 |
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Owner name: HANGZHOU JINGYI INTELLIGENT TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: CIXI MASTE ELECTRONIC TECHNOLOGY CO., LTD. Effective date: 20150409 |
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Free format text: CORRECT: ADDRESS; FROM: 315300 NINGBO, ZHEJIANG PROVINCE TO: 310013 HANGZHOU, ZHEJIANG PROVINCE |
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Effective date of registration: 20150409 Address after: 310013 Xihu District, Hangzhou, Wensanlu Road, No. venture building, room 199, room 1402 Applicant after: HANGZHOU JINGYI INTELLIGENT TECHNOLOGY CO., LTD. Address before: 315300 Zhejiang city of Ningbo province Cixi city Kandun Industrial Park Road No. 1 big Applicant before: Cixi Maste Electronic Technology Co., Ltd. |
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