CN101451938A - Portable hardometer - Google Patents
Portable hardometer Download PDFInfo
- Publication number
- CN101451938A CN101451938A CNA2007101569908A CN200710156990A CN101451938A CN 101451938 A CN101451938 A CN 101451938A CN A2007101569908 A CNA2007101569908 A CN A2007101569908A CN 200710156990 A CN200710156990 A CN 200710156990A CN 101451938 A CN101451938 A CN 101451938A
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- bump
- piezoelectric ceramics
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- post
- trigger
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Abstract
The invention relates to a portable sclerometer, comprising an impact microphone and a test signal processing circuit, wherein the impact microphone is composed of an engine base, a strike column, a power spring, a trigger and piezoelectric ceramic and a strike head tabled in the strike column, with the head clung with the strike head. In the test signal processing circuit, piezoelectric ceramic output lines are connected with a rectification circuit, a voltage follower, a capacitance storage circuit, an indicating circuit in turn through a transformer. The invention is suitable for testing of each type of bulk objects under the non-vertical state, in addition, the invention has the advantages of high sensitivity, correct testing and wide testing range.
Description
Technical field
The present invention and appliance are particularly to scleroscopic improvement.
Background technology
Existing sclerometer mostly is mesa structure greatly, is to cause the detected material body deformability with pressure of the same size, then according to the deflection size, detects the hardness of object, and this class sclerometer volume is big, is not easy to carry, and can't detects the bulk object.Other has a kind of Rockwell portable hardometer, is the structure that adopts the screw drive extrusion head, and the testee back side needs spacing, just uses two faces, so can only detect thin, miniature workpiece; The Richter scale portable hardometer then is to adopt the bump principle, acceleration transducer is set in impact hammer, bounce-back acceleration detection object hardness according to impact hammer, but this scleroscopic impact hammer is to do the movement of falling object when working, can only be used for the detection of horizontal, be the necessary horizontal positioned of testee, thereby also be not suitable for the detection of special-shaped bulk object.
Summary of the invention
The object of the invention is to provide a kind of sclerometer that various erose large-sized object hardness detect that is suitable for, and uses with convenient.
The solution of the present invention is: portable hardometer, comprise impact microphone and detection signal treatment circuit, it is characterized in that impact microphone is made up of support, bump post, energy-stored spring, trigger and piezoelectric ceramics and bump head, the bump post is located in the guide hole of support, support is provided with trigger, be provided with energy-stored spring between bump post and support, energy-stored spring and trigger constitute the controlled release device; The leading section of bump post is provided with piezoelectric ceramics and bump head successively, and piezoelectric ceramics is embedded in the bump post, and the rear end of piezoelectric ceramics is close to and is contacted with the bump post, and front end and bump are close to.
Be provided with transformer in the detection signal treatment circuit, the piezoelectric ceramics output lead in the impact microphone is connected with transformer input winding, and transformer output winding is electrically connected with rectification circuit, voltage follower, electric capacity storage circuit, indicating circuit order successively.
Advantage of the present invention is: because the release control device that has adopted energy-stored spring and trigger to constitute, the driving force of bump is from energy-stored spring, thereby can detect under non-vertical state, is applicable to the detection of various special-shaped bulk objects; In addition, piezoelectric ceramics output voltage height makes device have advantage highly sensitive, that detection is accurate, sensing range is wide.
Description of drawings
The invention will be further described with embodiment with reference to the accompanying drawings below.
Fig. 1 is a sensor construction synoptic diagram of the present invention.
Fig. 2 is the circuit diagram that detects treatment circuit.
Mark among the figure: 1 back-up ring, 2 triggers, 3 supports, 4 piezoelectric ceramics housings, 5 fixed screws, 6 piezoelectric ceramics, 7 testees, 8 bump heads, 9 bump posts, 10 springs, 11 lead-in wires, 12 energy-stored springs.
Embodiment
The sclerometer of embodiment is made up of impact microphone and the main frame that has comprised the detection signal treatment circuit.
The structure of impact microphone as shown in Figure 1, it is made up of support 3, bump post 9, energy-stored spring 12, trigger 2 and piezoelectric ceramics 6 and bump 8.
9 activities of bump post are located in the guide hole of support 3, and telescopic action is with energy-stored spring 12 on the bump post 9, between guide hole bottom and bump post 9 leading sections.
Move on bump post 9, trigger 2 cards are fended off and are enclosed on 1, and it is fixing to clash into post 9, and when cocking 2, bump post 9 discharges, and bump is placed on the testee of support 3 lower port under the promotion of energy-stored spring 12.
The leading section of bump post 9 is provided with piezoelectric ceramics 6 and bump 8 successively.
Piezoelectric ceramics 6 is fixed in its housing 4, the metal electrode of rear end is close to and is contacted with the bump post, a bump that front end and wimet are made 8 is close to and is contacted, more than each parts make an integral body, be embedded in the front end of bump post 9, fixing with fixed screw 5, in order to guarantee electric conductivity, be provided with spring 10 at the metal electrode and 9 on the post of bump of piezoelectric ceramics.
Detection signal treatment circuit in the main frame mainly is made up of transformer, rectification circuit, voltage follower, electric capacity storage circuit, indicating circuit as shown in Figure 2.
Among the figure, diode D is as rectification circuit; Operational amplifier IC1 is a voltage follower; Isolating diode D2, capacitor C, reset button AN forms the electric capacity storage circuit; Voltage follower IC2, resistance R, gauge outfit G form indicating circuit.
The piezoelectric ceramics output lead is connected with transformer input winding, and transformer output winding is electrically connected with rectification circuit, voltage follower, electric capacity storage circuit, indicating circuit order successively.
Because piezoelectric ceramics output impedance height, voltage height, so the transformer B that adopts is a step-down transformer, the input impedance that embodiment adopts is the 10K level, and transformation ratio is 10:1.
During test, because testee hardness difference, when wimet bump head clashed into its generation, the deflection of testee also had nothing in common with each other, and under identical impact effect, object hard hit hit intensity more is big more, and the output voltage of piezoelectric ceramics is high more, otherwise low more.
This voltage signal is through transformer B step-down, and the D rectification becomes DC pulse, because its energy is little, behind voltage follower IC, charges to C by D2, and the magnitude of voltage of C is the peak value of signal pulse, and this numerical value is directly relevant with testee hardness.
By the IC2 effect, can demonstrate stable reading on the gauge outfit G, by scale in advance, this reading is corresponding hardness reading.
Claims (1)
- Portable hardometer, comprise impact microphone and detection signal treatment circuit, it is characterized in that: it is characterized in that impact microphone is made up of support (3), bump post (9), energy-stored spring (12), trigger (2) and piezoelectric ceramics (6) and bump (8), bump post (9) is located in the guide hole of support (3), support (3) is provided with trigger (2), be provided with energy-stored spring (12) between bump post (9) and support (3), energy-stored spring (12) and trigger (3) constitute the controlled release device; The leading section of bump post (9) is provided with piezoelectric ceramics (6) and bump head (8) successively, and piezoelectric ceramics (6) is embedded in bump post (9), and the rear end of piezoelectric ceramics (6) is close to bump post (9) and is contacted, front end with clash into (8) and be close to; Be provided with transformer (B) in the detection signal treatment circuit, the output lead of the piezoelectric ceramics in the impact microphone (11) is connected with transformer input winding, and transformer output winding is electrically connected with rectification circuit, voltage follower, electric capacity storage circuit, indicating circuit order successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101569908A CN101451938A (en) | 2007-11-29 | 2007-11-29 | Portable hardometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101569908A CN101451938A (en) | 2007-11-29 | 2007-11-29 | Portable hardometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101451938A true CN101451938A (en) | 2009-06-10 |
Family
ID=40734303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101569908A Pending CN101451938A (en) | 2007-11-29 | 2007-11-29 | Portable hardometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101451938A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106610361A (en) * | 2016-12-14 | 2017-05-03 | 王昌益 | Material hardness unification and comparison research method and hardmeter |
| CN107607422A (en) * | 2017-08-30 | 2018-01-19 | 苏州昌田机械设备制造有限公司 | A kind of coating for metal surfaces hardness-testing device |
| CN107615040A (en) * | 2015-06-25 | 2018-01-19 | 麦克赛尔株式会社 | Hardometer |
| CN110234975A (en) * | 2016-11-29 | 2019-09-13 | 赫尔穆特费舍尔股份有限公司电子及测量技术研究所 | For seeking measuring device, measurement component and the method for measuring signal when pressure head indentation moves in specimen surface |
| CN110420058A (en) * | 2019-07-12 | 2019-11-08 | 南京航空航天大学 | A kind of flexible robot and detection method with hardness determination function |
| CN111198143A (en) * | 2020-01-09 | 2020-05-26 | 大连理工大学 | Electric control type penetrometer for measuring hardness of accumulated snow |
-
2007
- 2007-11-29 CN CNA2007101569908A patent/CN101451938A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107615040A (en) * | 2015-06-25 | 2018-01-19 | 麦克赛尔株式会社 | Hardometer |
| CN110234975A (en) * | 2016-11-29 | 2019-09-13 | 赫尔穆特费舍尔股份有限公司电子及测量技术研究所 | For seeking measuring device, measurement component and the method for measuring signal when pressure head indentation moves in specimen surface |
| CN106610361A (en) * | 2016-12-14 | 2017-05-03 | 王昌益 | Material hardness unification and comparison research method and hardmeter |
| CN107607422A (en) * | 2017-08-30 | 2018-01-19 | 苏州昌田机械设备制造有限公司 | A kind of coating for metal surfaces hardness-testing device |
| CN110420058A (en) * | 2019-07-12 | 2019-11-08 | 南京航空航天大学 | A kind of flexible robot and detection method with hardness determination function |
| CN110420058B (en) * | 2019-07-12 | 2021-10-26 | 南京航空航天大学 | Flexible robot with hardness detection function and detection method |
| CN111198143A (en) * | 2020-01-09 | 2020-05-26 | 大连理工大学 | Electric control type penetrometer for measuring hardness of accumulated snow |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090610 |