CN2198948Y - Tester for servicing net ball - Google Patents
Tester for servicing net ball Download PDFInfo
- Publication number
- CN2198948Y CN2198948Y CN 94202955 CN94202955U CN2198948Y CN 2198948 Y CN2198948 Y CN 2198948Y CN 94202955 CN94202955 CN 94202955 CN 94202955 U CN94202955 U CN 94202955U CN 2198948 Y CN2198948 Y CN 2198948Y
- Authority
- CN
- China
- Prior art keywords
- net
- piezoelectric ceramic
- ball
- ceramic piece
- servicing
- 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 - Lifetime
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- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The utility model belongs to a tester for servicing net of ball matches. A string of piezoelectric ceramic sheets 1 are horizontally arranged in the clamping layer of the cloth edge 2 on the ball net, and the distance is less than or equal to 1 / 10 of the ball diameter; each sheet of piezoelectric ceramic sheet is connected in parallel, and when the ball is served the net, the piezoelectric ceramic sheet exerted by mechanical stress generates scores of millivolts pulse voltage signals which are transmitted to a signal processing indicating unit by a conducting wire. The utility model has the advantages of high sensitivity of servicing net test, real time output and stability and reliability.
Description
The utility model service touching the net checkout gear belongs to ball game net checkout gear, can be used for table tennis, tennis, shuttlecock and vollyball etc.
Ball game all is by the visual judgement net of referee, because the limitation of referee's observation angle erroneous judgement usually occurs, fails to judge.In the international tournament occasion, in the time of general the match, record a video, when dispute occurring, play the auxiliary reference effect of having recorded a video.At present, still detect indicating device without any net.
The purpose of this utility model provides a net checkout gear, when ball net, and real time output.
Below in conjunction with its technical scheme of description of drawings.
Piezoelectric ceramic piece installation diagram in Fig. 1 top of the net selvedge interlayer.
Fig. 2 top of the net selvedge interlayer profile.
In top of the net selvedge 2 interlayers, in order horizontal a string piezoelectric ceramic piece 1 passes through. This piezoelectric ceramic piece sintering is on brass substrate 4, and another side is by silver, and formation silver layer 5 sticks with glue or line is fixed in top of the net selvedge 2 interlayers, and edge is parallel with upper limb selvedge 2 on it, and slightly exceeds upper limb selvedge 2. Each sheet piezoelectric ceramics 1 spacing is less than or equal to the diameter of 1/10 ball, and the brass substrate 4 of each sheet piezoelectric ceramic piece 1 and silver layer 5 are connected mutually, and each sheet piezoelectric ceramic piece 1 is parallel with one another. Hollow Pillar 3 by net one end causes billiard table or detection indicating member outside the venue.
The piezoelectric ceramics sheet material is lead titanates, lead zirconate titanate and lead niobate etc.
When the ball net, ball touches piezoelectric ceramic piece 1, and piezoelectric ceramic piece 1 is subjected to the both ends of the surface of mechanical stress, i.e. brass substrate and produced an electric pulse by silver electrode, this signal be by treatment circuit, generation sound, light indication.
The utility model advantage is that net detects sensitivity, detects in real time, installs and implements conveniently.
Embodiment describes in further detail below in conjunction with table tennis net checkout gear, and it installs as shown in Figure 1 and Figure 2.Piezoelectric ceramic piece is of a size of wide 27 millimeters, high 3 millimeters, piezoelectric ceramics and by thick 0.4 millimeter of silver electrode.Spacing is 1 millimeter in each sheet piezoelectric ceramic piece, exceeds 0.5 millimeter of top of the net selvedge.The brass substrate of each sheet piezoelectric ceramics and connected by silver electrode serial connection, with the lead soldering, lead is the multiply flexible cord, and is hidden in net selvedge interlayer, and causes signal by net one end Hollow Pillar and handle indicating member.
When the table tennis net, piezoelectric ceramic piece is subjected to the both ends of the surface of mechanical stress, can produce tens millivolts pulse voltage signal, and this signal strength signal intensity is enough to driving signal and handles indicating member, produces the acousto-optic indication, indication in real time, and reliable and stable.
Claims (2)
1, a kind of service touching the net checkout gear is characterized in that: in top of the net selvedge [2] interlayer, stick with glue in order from an end to the other end or the line fixing horizontal is arranged a string piezoelectric ceramic piece [1]; Each sheet piezoelectric ceramic piece [1] spacing is less than or equal to ball warp 1/10, and each sheet piezoelectric ceramic piece [1] slightly exceeds top of the net selvedge [2].
2, service touching the net checkout gear according to claim 1 is characterized in that: the brass substrate ［ 4 ］ of each sheet piezoelectric ceramic piece ［ 1 ］ both sides and silver layer ［ 5 ］ are connected with the multiply flexible cord, and the multiply flexible cord is drawn from Hollow Pillar ［ 3 ］.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94202955 CN2198948Y (en) | 1994-02-05 | 1994-02-05 | Tester for servicing net ball |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94202955 CN2198948Y (en) | 1994-02-05 | 1994-02-05 | Tester for servicing net ball |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2198948Y true CN2198948Y (en) | 1995-05-31 |
Family
ID=33822596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94202955 Expired - Lifetime CN2198948Y (en) | 1994-02-05 | 1994-02-05 | Tester for servicing net ball |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2198948Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2925418A4 (en) * | 2012-11-27 | 2016-07-13 | Group One Ltd | Tennis net tension system including service let indication feature |
| US10080943B2 (en) | 2012-11-27 | 2018-09-25 | Group One Limited | Tennis net tension system including service let indication feature |
| US10272307B2 (en) | 2012-11-27 | 2019-04-30 | Group One Limited | Tennis net tension system including service let indication feature |
| US11738248B2 (en) | 2012-11-27 | 2023-08-29 | Group One Limited | Tennis net tension system including service let indication feature |
-
1994
- 1994-02-05 CN CN 94202955 patent/CN2198948Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2925418A4 (en) * | 2012-11-27 | 2016-07-13 | Group One Ltd | Tennis net tension system including service let indication feature |
| US9687707B2 (en) | 2012-11-27 | 2017-06-27 | Group One Limited | Tennis net tension system including service let indication feature |
| US10080943B2 (en) | 2012-11-27 | 2018-09-25 | Group One Limited | Tennis net tension system including service let indication feature |
| US10272307B2 (en) | 2012-11-27 | 2019-04-30 | Group One Limited | Tennis net tension system including service let indication feature |
| US10583341B2 (en) | 2012-11-27 | 2020-03-10 | Group One Limited | Tennis net tension system including service let indication feature |
| US11318362B2 (en) | 2012-11-27 | 2022-05-03 | Group One Limited | Tennis net tension system including service let indication feature |
| US11738248B2 (en) | 2012-11-27 | 2023-08-29 | Group One Limited | Tennis net tension system including service let indication feature |
| US11944881B2 (en) | 2012-11-27 | 2024-04-02 | Group One Limited | Tennis net tension system including service let indication feature |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |