JPS6239893B2 - - Google Patents
Info
- Publication number
- JPS6239893B2 JPS6239893B2 JP9399280A JP9399280A JPS6239893B2 JP S6239893 B2 JPS6239893 B2 JP S6239893B2 JP 9399280 A JP9399280 A JP 9399280A JP 9399280 A JP9399280 A JP 9399280A JP S6239893 B2 JPS6239893 B2 JP S6239893B2
- Authority
- JP
- Japan
- Prior art keywords
- air
- leak
- air leak
- wristwatch
- strain
- 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
Links
- 230000007423 decrease Effects 0.000 claims description 8
- 238000007689 inspection Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000002775 capsule Substances 0.000 claims description 6
- 238000012360 testing method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/36—Investigating fluid-tightness of structures by using fluid or vacuum by detecting change in dimensions of the structure being tested
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Description
【発明の詳細な説明】
この発明は、腕時計の防水試験を空気加圧時の
エアリークの有無によつて行うエアリーク検査方
法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air leak testing method for testing the waterproofness of a wristwatch by determining the presence or absence of air leaks when air is pressurized.
先ず、この発明の対象とする腕時計のエアリー
ク検査方法について説明する。 First, an air leak testing method for a wristwatch, which is the object of the present invention, will be explained.
第１図に示すように、密閉したカプセル１内の
置台３上に腕時計２を載置し、空気加圧口４から
加圧空気を注入してカプセル１内を空気加圧す
る。 As shown in FIG. 1, a wristwatch 2 is placed on a stand 3 inside a sealed capsule 1, and pressurized air is injected from an air pressurizing port 4 to pressurize the inside of the capsule 1.
この時、腕時計２にエアリークがないか、あつ
ても極めて少なければ、時計内部の圧力より外側
の圧力の方が高くなるため、その圧力差によつて
風防ガラス２ａ及び裏蓋２ｂが歪を起し、完全に
洩れのない時計であれば一定の空気加圧状態では
一定の歪量が維持される。 At this time, if there is no air leak in the watch 2, or if there is a very small air leak, the pressure outside the watch will be higher than the pressure inside the watch, and this pressure difference will cause distortion in the windshield 2a and back cover 2b. However, if the watch is completely leak-free, a constant amount of distortion will be maintained under a constant air pressure.
腕時計２に僅かでもエアリークがあると、その
内部の圧力が僅かづつ上昇して内外の圧力差が減
少するため、加圧による歪が徐々に回復する。 If there is even a slight air leak in the wristwatch 2, the internal pressure will rise little by little and the pressure difference between the inside and outside will decrease, so the strain caused by pressurization will gradually recover.
腕時計２の防水が全く不完全で大きなエアリー
クがある場合には、空気加圧しても腕時計２の内
部も外側と同じ圧力になつてしまうため歪が生じ
ない。 If the waterproofing of the wristwatch 2 is completely incomplete and there is a large air leak, even if air is pressurized, the inside of the wristwatch 2 will have the same pressure as the outside, so no distortion will occur.
そこで、差動トランス等による歪センサ５によ
つてこの空気加圧時の風防ガラス２ａ又は裏蓋２
ｂの歪量を検出して、リーク検出器６でエアリー
クの有無を検出し、ランプ等による表示器７にそ
れを表示するようにした腕時計のエアリーク検査
装置が近時使用されるようになつた。 Therefore, a strain sensor 5 such as a differential transformer is used to detect the windshield 2a or the back cover 2 when the air is pressurized.
An air leak testing device for wristwatches has recently come into use, which detects the amount of distortion in the air leakage point b, detects the presence or absence of an air leak with a leak detector 6, and displays it on a display 7 using a lamp or the like. .
このような装置において、歪量の時間的変化曲
線は、前述のように、エアリークが全くない場合
は第２図の曲線ａのように空気加圧力増加中T1
以後は一定の歪量を維持し、僅かなエアリークが
ある場合は曲線ｂのように空気加圧力増加中T1
以後の一定加圧状態で歪量が減少し、大きなエア
リークがある場合は曲線ｃのように歪が発生しな
いと考えられていた。 In such a device, as mentioned above, when there is no air leak, the time change curve of the strain amount is T 1 during the increase in air pressure, as shown by curve a in Fig. 2.
After that, maintain a constant amount of strain, and if there is a slight air leak, the air pressurization pressure increases as shown in curve b T 1
It was thought that the amount of strain would decrease under a constant pressurization state, and that if there was a large air leak, no strain would occur as shown by curve c.
そのため、従来のリーク検出器６では、空気加
圧力増加中の時間T1ではリークの有無を判断せ
ず、一定加圧状態の測定時間T2において、一定
の時間間隔で歪量の変化を検出し、例えば歪量が
0.06μ以上減少したら小リーク有り（不良）と判
定し、また初めから殆んど歪が生じない場合は大
リーク有り（不良）と判定し、そのいずれでもな
い場合にリークなし（良品）と判定していた。 Therefore, the conventional leak detector 6 does not judge the presence or absence of a leak during the time T 1 when the air pressure is increasing, but detects changes in the amount of strain at regular time intervals during the measurement time T 2 when the air pressurization is constant. For example, if the amount of distortion is
If it decreases by 0.06 μ or more, it is determined that there is a small leak (defective), if there is almost no distortion from the beginning, it is determined that there is a large leak (defective), and if neither of these occurs, it is determined that there is no leak (good product). Was.
ところが、実際には第２図の曲線ｄのように、
空気加圧力増加中にある程度まで歪量が増加した
後一時減少してそのまま、あるいはその後再び増
加し、一定加圧力の測定時間T1では一定の歪量
を維持してしまう場合がある。 However, in reality, like curve d in Figure 2,
While the air pressurizing force is increasing, the amount of strain increases to a certain extent, then temporarily decreases, remains the same, or increases again after that, and may maintain a constant amount of strain during the measurement time T 1 of the constant pressurizing force.
これは、腕時計２のエアリーク部が一定の差圧
を維持する弁の作用をなしてしまうためと推考さ
れるが、このような時計を水中加圧すれば、内外
の圧力差が一定以上になつた時に水が入つてしま
うため防水不良としなければならない。 This is thought to be because the air leak part of wristwatch 2 acts as a valve to maintain a constant pressure difference, but if such a watch is pressurized underwater, the pressure difference between the inside and outside will exceed a certain level. It must be considered waterproof because water can get in when it is used.
しかるに、従来のエアリーク検査方法では、こ
のような場合にエアリークなし（良品）と判定し
てしまう不都合があつた。 However, the conventional air leak testing method has the disadvantage that in such cases it is determined that there is no air leak (good product).
この発明は、このような不都合を解消し、エア
リークの有無すなわち腕時計の防水性の良否を正
確に検査し得るようにすることを目的とする。 It is an object of the present invention to eliminate such inconveniences and to make it possible to accurately test whether there is an air leak, that is, whether the waterproofness of a wristwatch is good or bad.
そのため、この発明は、前述のような従来のエ
アリーク検査方法に加えて、カプセル内の空気加
圧力を増加させている間にもエアリークの有無を
検査するようにし、その間に歪量が減少した時に
もエアリーク有りと判定するものである。 Therefore, in addition to the conventional air leak testing method as described above, this invention also tests for the presence of air leaks while increasing the air pressure inside the capsule, and when the amount of strain decreases during that time, It is also determined that there is an air leak.
以下、添付図面の第３図乃至第５図を参照し
て、この発明の実施例を説明する。 Embodiments of the present invention will be described below with reference to FIGS. 3 to 5 of the accompanying drawings.
第３図はこの発明によるエアリーク検査方法を
実施するためのリーク検出回路の一例を示す。 FIG. 3 shows an example of a leak detection circuit for carrying out the air leak inspection method according to the present invention.
この回路は第１図のリーク検出器内に設けるも
のであり、歪センサ５の出力信号を整形増幅して
得た歪量に比例する歪信号電圧ａを入力する入力
端子１０と、その入力電圧のピーク値を保持する
ピークホールド回路１１と、その出力を分圧する
抵抗１２，１３と、オペアンプを用いた比較器１
４及びその出力端子１５からなる。 This circuit is provided in the leak detector shown in FIG. 1, and includes an input terminal 10 for inputting a strain signal voltage a proportional to the amount of strain obtained by shaping and amplifying the output signal of the strain sensor 5, and A peak hold circuit 11 that holds the peak value of , resistors 12 and 13 that divides its output, and a comparator 1 that uses an operational amplifier.
4 and its output terminal 15.
ピークホールド回路１１は、オペアンプ１６と
ダイオード１７及びコンデンサ１８からなり、入
力端子１０からの入力電圧が上昇している間はそ
れをオペアンプ１６及びダイオード１７を介して
インピーダンス変換してコンデンサ１８に充電
し、Ｂ点の出力電圧を入力電圧と等しくするが、
入力電圧が低下するとダイオード１７が非導通状
態になつてＢ点の電圧の低下を阻止し、ピーク値
を保持させる。 The peak hold circuit 11 consists of an operational amplifier 16, a diode 17, and a capacitor 18, and while the input voltage from the input terminal 10 is rising, it converts the input voltage through the operational amplifier 16 and the diode 17 to impedance and charges the capacitor 18. , the output voltage at point B is equal to the input voltage, but
When the input voltage decreases, the diode 17 becomes non-conductive to prevent the voltage at point B from decreasing and maintain the peak value.
そこで、抵抗１２，１３の抵抗値を大きくと
り、抵抗１２の抵抗値をR12、抵抗１３の抵抗値
をR13とした時、例えばR12＝990KΩR13＝10KΩ
とすれば、その分圧点B′の電圧ｂはピークホール
ド回路１１の出力電圧の99％の大きさになる。 Therefore, when the resistance values of resistors 12 and 13 are set large, and the resistance value of resistor 12 is R 12 and the resistance value of resistor 13 is R 13 , for example, R 12 = 990KΩR 13 = 10KΩ
Then, the voltage b at the voltage dividing point B' becomes 99% of the output voltage of the peak hold circuit 11.
例えば、空気加圧力増加期間T1で第４図イに
実線で示すように変化する歪信号電圧ａが入力端
子１０に入力すると、分圧点B′の電圧ｂは同図に
破線で示すように変化することになる。 For example, when the strain signal voltage a that changes as shown by the solid line in Fig. 4A during the air pressure increase period T 1 is input to the input terminal 10, the voltage b at the voltage dividing point B' changes as shown by the broken line in the figure. It will change to.
この歪信号電圧ａと分圧点B′の電圧ｂを比較器
１４の非反転入力端子と反転入力端子に入力
して比較するので、歪信号電圧ａが上昇中はａ＞
ｂなので比較器１４の出力ｃは第４図ロに示すよ
うにハイレベル“Ｈ”であるが、歪信号電圧ａが
ピーク値より１％以上低下するとａ＜ｂになるの
で、比較器１４の出力ｃが反転してローレベル
“Ｌ”になる。 Since this distortion signal voltage a and the voltage b at the voltage dividing point B' are input to the non-inverting input terminal and the inverting input terminal of the comparator 14 and compared, when the distortion signal voltage a is rising, a>
Therefore, the output c of the comparator 14 is at a high level "H" as shown in FIG. Output c is inverted and becomes low level "L".
この比較器１４の出力ｃが“Ｈ”から“Ｌ”へ
反転することがエアリーク有りの判定となる。 When the output c of the comparator 14 is inverted from "H" to "L", it is determined that there is an air leak.
また、歪信号電圧ａが第５図イに実線で示すよ
うに変化した場合にも、電圧ｂは同図に破線で示
すように変化し、比較器１４の出力ｃは第５図ロ
に示すように空気加力増加期間T1内で一旦
“Ｈ”から“Ｌ”になつて再び“Ｈ”になる。 Furthermore, when the distortion signal voltage a changes as shown by the solid line in FIG. As shown, within the air force increase period T1 , the signal changes from "H" to "L" and then becomes "H" again.
したがつて、この場合にも比較器１４の出力ｃ
が“Ｈ”から“Ｌ”に反転した時にエアリーク有
りの判定とする。 Therefore, in this case as well, the output c of the comparator 14
When the voltage changes from "H" to "L", it is determined that there is an air leak.
歪信号電圧がピーク値からどのくらい低下した
時にエアリーク有りと判定するかは、抵抗１２と
１３の比の選び方によつて変更できる。また、リ
ーク検出回路は第３図の回路に限るものではな
い。 The degree to which it is determined that there is an air leak when the distortion signal voltage decreases from the peak value can be changed by selecting the ratio of the resistors 12 and 13. Further, the leak detection circuit is not limited to the circuit shown in FIG.
なお、空気加圧を一定にした後のエアリーク検
査方法は従来と同様であるから説明を省略する。 Note that the air leak inspection method after the air pressurization is made constant is the same as the conventional method, so the explanation will be omitted.
以上説明したように、この発明のエアリーク検
査方法によれば、第４図イ及び第５図イに実線で
示すように歪量が変化して、空気加圧力が一定に
なつた時はその歪量が変化しない場合にも、エア
リークを検出することができるので、腕時計の防
水試験の精度をより向上させることができる。 As explained above, according to the air leak inspection method of the present invention, when the amount of strain changes as shown by the solid line in Figure 4A and Figure 5A, and the air pressure becomes constant, the strain changes. Since air leaks can be detected even when the amount does not change, the accuracy of waterproof tests for wristwatches can be further improved.
第１図はこの発明を適用すべき腕時計のエアリ
ーク検査装置の構成図、第２図はその検査方法を
説明するための線図、第３図はこの発明の方法を
実施するためリーク検出回路の一例を示す回路
図、第４図及び第５図はその動作説明のための各
部の信号波形図である。
１……カプセル、２……腕時計、２ａ……風防
ガラス、２ｂ……裏蓋、４……空気加圧口、５…
…歪センサ、６……リーク検出器、７……表示
器、１１……ピークホールド回路、１２，１３…
…抵抗、１４……比較器。
Fig. 1 is a block diagram of an air leak inspection device for a wristwatch to which the present invention is applied, Fig. 2 is a diagram for explaining the inspection method, and Fig. 3 is a diagram of a leak detection circuit for carrying out the method of the present invention. A circuit diagram showing an example, and FIGS. 4 and 5 are signal waveform diagrams of various parts for explaining the operation. 1...Capsule, 2...Watch, 2a...Windshield, 2b...Back cover, 4...Air pressurization port, 5...
...Distortion sensor, 6...Leak detector, 7...Display device, 11...Peak hold circuit, 12, 13...
...Resistor, 14...Comparator.
Claims (1)
プセル内を空気加圧し、腕時計の風防ガラス又は
裏蓋の歪量を測定してエアリークの有無を判定す
る腕時計のエアリーク検査方法において、前記カ
プセル内の空気加圧力を増加させている間に前記
歪量が減少した時にも、エアリーク有りと判定す
ることを特徴とする腕時計のエアリーク検査方
法。1. In a wristwatch air leak inspection method in which a wristwatch is placed in a sealed capsule, the inside of the capsule is pressurized with air, and the amount of distortion of the windshield or back cover of the wristwatch is measured to determine the presence or absence of an air leak. An air leak inspection method for a wristwatch, characterized in that it is determined that there is an air leak even when the amount of strain decreases while increasing the pressurizing force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9399280A JPS5719638A (en) | 1980-07-11 | 1980-07-11 | Inspection for air leak of wrist watch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9399280A JPS5719638A (en) | 1980-07-11 | 1980-07-11 | Inspection for air leak of wrist watch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5719638A JPS5719638A (en) | 1982-02-01 |
| JPS6239893B2 true JPS6239893B2 (en) | 1987-08-25 |
Family
ID=14097891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9399280A Granted JPS5719638A (en) | 1980-07-11 | 1980-07-11 | Inspection for air leak of wrist watch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5719638A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003532863A (en) * | 2000-09-26 | 2003-11-05 | マーチン・レーマン | Method and apparatus for closed container leak inspection |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5735288U (en) * | 1980-08-08 | 1982-02-24 |
-
1980
- 1980-07-11 JP JP9399280A patent/JPS5719638A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003532863A (en) * | 2000-09-26 | 2003-11-05 | マーチン・レーマン | Method and apparatus for closed container leak inspection |
| JP4854891B2 (en) * | 2000-09-26 | 2012-01-18 | マーチン・レーマン | Method and apparatus for closed container leak inspection |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5719638A (en) | 1982-02-01 |
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