JPH0972801A - Tension measuring apparatus for rope - Google Patents
Tension measuring apparatus for ropeInfo
- Publication number
- JPH0972801A JPH0972801A JP22535395A JP22535395A JPH0972801A JP H0972801 A JPH0972801 A JP H0972801A JP 22535395 A JP22535395 A JP 22535395A JP 22535395 A JP22535395 A JP 22535395A JP H0972801 A JPH0972801 A JP H0972801A
- Authority
- JP
- Japan
- Prior art keywords
- rope
- box
- outer box
- inner box
- tension
- 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.)
- Pending
Links
- 239000002184 metal Substances 0.000 claims abstract description 18
- 238000006073 displacement reaction Methods 0.000 claims abstract description 15
- 239000000470 constituent Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Landscapes
- Force Measurement Appropriate To Specific Purposes (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、例えばエレベー
タのかごを吊る主ロープの張力を測定するロープの張力
測定装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rope tension measuring device for measuring the tension of a main rope for suspending an elevator car, for example.
【０００２】[0002]
【従来の技術】図３は従来のエレベータ主ロープの張力
測定方法を示す説明図である。図３において、１は主ロ
ープ６の一端に懸架されて昇降路を昇降するかご、２は
主ロープ６の他端に懸架されたつり合いおもり、３は昇
降路最上部に設けられた機械室５に設置されてかご１を
昇降させる主ロープ６の巻上シーブ、４は主ロープのそ
らせ車である。2. Description of the Related Art FIG. 3 is an explanatory view showing a conventional tension measuring method for an elevator main rope. In FIG. 3, 1 is a car that is suspended at one end of the main rope 6 to elevate the hoistway, 2 is a counterweight that is suspended at the other end of the main rope 6, and 3 is a machine room 5 provided at the top of the hoistway. The hoisting sheaves 4 of the main rope 6 installed at the upper and lower portions of the car 1 are the deflecting wheels of the main rope.
【０００３】今、３本の主ロープ６でエレベータのかご
１を吊っていると仮定する。主ロープ６の張力を測定す
る場合に、まず、作業者はかご１上に位置して手動運転
にてかご１をそらせ車４とつり合いおもり２の中間位置
付近へ昇降させる。そして、作業者は、図３に示すよう
に、主ロープ６の１本を手でつかみ、手前に引き寄せ、
そのときの力の掛かり具合を手で感じ取る。以下、残り
の２本についても同様な動作を繰り返し、３本の主ロー
プ６の力の掛かり具合を比べる。It is now assumed that the elevator car 1 is suspended by three main ropes 6. When measuring the tension of the main rope 6, first, an operator is positioned on the car 1 and manually moves the car 1 to deflect the car 1 and to move it up and down to a position near the intermediate position of the weight 2 in balance with the car 4. Then, as shown in FIG. 3, the operator grasps one of the main ropes 6 with his hand and pulls it toward him,
You can feel how much force is applied at that time. Hereinafter, the same operation is repeated for the remaining two ropes, and the force applied by the three main ropes 6 is compared.
【０００４】[0004]
【発明が解決しようとする課題】上述した従来の主ロー
プ６の張力測定方法は、主ロープ６を手前に引き寄せ、
そのときの力の掛かり具合を手で感じ取るようにしたの
で、３本の主ロープ６の張力を正確に比べることが難し
かった。The conventional method of measuring the tension of the main rope 6 described above pulls the main rope 6 toward you,
It was difficult to accurately compare the tensions of the three main ropes 6 because the force applied at that time was felt by hand.
【０００５】この発明は上述した従来例に係る問題点を
解消するためになされたもので、ロープの張力を数値化
して比較することができるロープの張力測定装置を得る
ことを目的とするものである。The present invention has been made in order to solve the above-mentioned problems of the conventional example, and an object thereof is to obtain a rope tension measuring device capable of numerically comparing and comparing rope tensions. is there.
【０００６】[0006]
【課題を解決するための手段】この発明に係るロープの
張力測定装置は、一側面が開口された外箱と、その外箱
の開口部に対向する一側面が開口されていて該外箱内に
引き出し自在に収納される内箱と、上記外箱と内箱の開
口部と相対向する内壁面間に内箱を外箱内に収納する方
向に付勢するようにして固着されたばねと、上記外箱に
設けられかつ外部に位置して測定対象のロープを引っか
けるためのフックと、上記内箱に設けられかつ外部に位
置して引っ張ることで内箱を外箱から引き出し固定点に
係止させるための把手と、上記内箱と上記外箱の開口部
に対向する側面に内箱が外箱内に収納された状態で所定
距離離間するようそれぞれ固着された第１と第２のセン
サ構成要素を有し、上記フックを上記ロープに引っかけ
上記把手を引っ張り固定点に係止させた状態で該ロープ
の張力に応じて変化する第１と第２のセンサ構成要素間
の幾何学量に応じた出力を得る変位センサと、この変位
センサの出力に基づいて上記ロープの張力に応じた値を
出力する測定部とを備えたものである。SUMMARY OF THE INVENTION A rope tension measuring device according to the present invention comprises an outer box having one side open and one side facing the opening of the outer box. An inner box that can be stored in a retractable manner, and a spring that is fixed between the outer box and the inner wall surface facing the opening of the inner box so as to urge the inner box in the direction to store the inner box in the outer box. A hook provided on the outer box and located outside to hook the rope to be measured, and a hook provided on the inner box and located outside to pull the inner box from the outer box and lock it at a fixed point And a first sensor structure and a second sensor structure that are fixed to side surfaces of the inner box and the outer box facing the openings of the inner box so as to be separated from each other by a predetermined distance in a state where the inner box is housed in the outer box. Element, hook the hook on the rope and pull the handle A displacement sensor that obtains an output according to a geometric amount between the first and second sensor constituent elements that changes according to the tension of the rope in a state of being locked at a fixed point, and based on the output of this displacement sensor And a measuring unit for outputting a value according to the tension of the rope.
【０００７】また、上記変位センサは、第１のセンサ構
成要素として差動トランスを備えると共に、第２のセン
サ構成要素として上記差動トランスの出力コイルから発
せられる交流磁界によって渦電流を引き起こす金属板を
備え、渦電流を用いた変位センサを構成し、上記差動ト
ランスの出力コイルの出力は、上記金属板との距離に応
じて変化することを特徴とするものである。The displacement sensor includes a differential transformer as a first sensor component, and a metal plate that causes an eddy current by an AC magnetic field emitted from the output coil of the differential transformer as a second sensor component. And a displacement sensor using an eddy current, wherein the output of the output coil of the differential transformer changes in accordance with the distance from the metal plate.
【０００８】[0008]
【発明の実施の形態】図１はこの発明に係るロープの張
力測定装置の構成を模式的に示す断面図である。同図に
おいて、７は一側面が開口された外箱、８は外箱７の開
口部に対向する一側面が開口されていて外箱７内に引き
出し自在に収納された内箱で、この外箱７と内箱８との
開口部と相対向する内壁面間には、ばね９ａと９ｂが内
箱８を外箱７内に収納する方向に付勢するようにして両
側に固着されている。1 is a sectional view schematically showing the structure of a rope tension measuring device according to the present invention. In the figure, 7 is an outer box with one side open, and 8 is an inner box with one side facing the opening of the outer box 7 that is openably housed in the outer box 7. Springs 9a and 9b are fixed between the inner wall surfaces of the box 7 and the inner box 8 facing each other so as to urge the inner box 8 into the outer box 7 between the inner wall surfaces thereof. .
【０００９】外箱７の開口部に対向する側面のほぼ中央
部には、孔を貫通しかつ大部分が箱内に収納されるよう
にして取付金具によって固着された差動トランス１０
と、この差動トランス１０に連結され箱外部に位置して
主ロープ６を引っかけるためのフック１１とが設けられ
ている。差動トランス１０は入力コイル１０ａと出力コ
イル１０ｂとを備え、入力コイル１０ａには電源スイッ
チ１２を介して外部から交流入力が与えられるようにな
されている。A differential transformer 10 is fixed to the outer box 7 by means of a metal fitting so as to penetrate through the hole and to be housed in the box in a substantially central portion of the side surface facing the opening.
And a hook 11 connected to the differential transformer 10 and located outside the box for hooking the main rope 6. The differential transformer 10 includes an input coil 10a and an output coil 10b, and an AC input is externally applied to the input coil 10a via a power switch 12.
【００１０】他方、内箱８の開口部に対向する側面のほ
ぼ中央部には、差動トランス１０の出力コイル１０ｂに
対向し、内箱８が外箱７内に完全に収納された状態で所
定距離Ｌ0 離間してなる金属板１３が固着されていて、
出力コイル１０ｂから発せられる交流磁界が金属板１３
中の渦電流を引き起こすようになされ、出力コイル１０
ｂのコンダクタンスの中には、金属板１３内での抵抗に
よる渦電流の減衰に起因する成分が含まれ、その大きさ
は出力コイル１０ｂと金属板１３との距離に比例するよ
うになされており、従って、出力コイル１０ｂと金属板
１３との距離に比例して出力コイル１０ｂの出力が変化
し、該差動トランス１０と金属板１３は、渦電流を用い
た変位センサを構成するようになっている。On the other hand, in a substantially central portion of the side surface facing the opening of the inner case 8, the inner case 8 is completely housed in the outer case 7 so as to face the output coil 10b of the differential transformer 10. The metal plate 13 separated by a predetermined distance L 0 is fixed,
The alternating magnetic field generated from the output coil 10b is the metal plate 13
The output coil 10 is adapted to cause an eddy current therein.
The conductance of b includes a component due to the attenuation of the eddy current due to the resistance in the metal plate 13, and the magnitude thereof is proportional to the distance between the output coil 10b and the metal plate 13. Therefore, the output of the output coil 10b changes in proportion to the distance between the output coil 10b and the metal plate 13, and the differential transformer 10 and the metal plate 13 form a displacement sensor using an eddy current. ing.
【００１１】１４は差動トランス１０の出力コイル１０
ｂの出力を増幅する増幅器、１５は増幅器１４の出力を
アナログデジタル変換するＡ／Ｄ変換部、１６は演算部
１６ａとメモリ部１６ｂとを備え、Ａ／Ｄ変換部１５の
出力をメモリ部１６ｂに格納されたあらかじめ設定され
た設定値と比較演算し張力測定結果を出力する張力測定
部であり、表示部１７に出力されて表示されるようにな
っている。また、１８は内箱８に取り付けられてロープ
の張力測定時に内箱８を外箱７から引き出す為の把手で
ある。Reference numeral 14 is an output coil 10 of the differential transformer 10.
An amplifier for amplifying the output of b, 15 is an A / D conversion section for converting the output of the amplifier 14 into an analog-digital format, 16 is provided with an arithmetic section 16a and a memory section 16b, and the output of the A / D conversion section 15 is the memory section 16b. It is a tension measuring unit that performs a comparison calculation with a preset set value stored in the above and outputs a tension measurement result, and is output to and displayed on the display unit 17. Reference numeral 18 is a handle attached to the inner box 8 for pulling out the inner box 8 from the outer box 7 when measuring the tension of the rope.
【００１２】次に、上記構成に係るロープの張力測定装
置の動作について説明する。今、作業者が図３に示すか
ご３上に位置し、主ロープ６の張力を測定しようとする
とき、作業者は把手１８を持ち、図２に示すように、フ
ック１１に主ロープ６を引っかけて把手１８を手前方向
（かご側）に引っ張る。把手１８を引っ張ることで、内
箱８は外箱７より引き出され、その状態で、かご３上に
設けた係止棒（図示せず）に把手１８を係止させる。こ
の時、係止棒を固定点として、差動トランス１０の出力
コイル１０ｂと金属板１３との間隙Ｌ0 は、図２に示す
ように、主ロープ６の張力に応じて内箱８の移動に伴っ
て広がって例えばＬ1 となる。Next, the operation of the rope tension measuring device having the above structure will be described. Now, when the operator is located on the car 3 shown in FIG. 3 and wants to measure the tension of the main rope 6, the operator holds the handle 18, and as shown in FIG. Hook and pull the handle 18 in the front direction (car side). By pulling the handle 18, the inner box 8 is pulled out from the outer box 7, and in that state, the handle 18 is locked by a locking rod (not shown) provided on the car 3. At this time, with the locking rod as a fixed point, the gap L 0 between the output coil 10 b of the differential transformer 10 and the metal plate 13 moves the inner box 8 in accordance with the tension of the main rope 6, as shown in FIG. And becomes, for example, L 1 .
【００１３】この差動トランス１０の出力コイル１０ｂ
と金属板１３との間隙Ｌ0 からＬ1への変化に伴い、差
動トランス１０の出力コイル１０ｂの出力電圧が変化
し、該出力電圧は増幅器１４によって増幅され、Ａ／Ｄ
変換器１５にてアナログ値からデジタル値に変換され、
そのデジタル値は、張力測定部１６に入力されて、演算
部１６ａによりメモリ部１６ｂにあらかじめ格納された
設定値と比較演算され、その結果が表示部１７により表
示される。Output coil 10b of the differential transformer 10
And with a gap L 0 of the metal plate 13 to change to L 1, the output voltage changes in the output coil 10b of the differential transformer 10, the output voltage is amplified by the amplifier 14, A / D
The converter 15 converts the analog value into a digital value,
The digital value is input to the tension measuring unit 16 and is compared and calculated by the calculating unit 16a with the set value stored in advance in the memory unit 16b, and the result is displayed on the display unit 17.
【００１４】このとき、演算部１６ａは、メモリ部１６
ｂにあらかじめ設定された設定値が例えば「５」であ
り、演算部１７に入力された値が「６」であれば、「＋
１」を表示部１７に表示させる。このようにして、主ロ
ープ６の張力測定後、把手１８を係止棒から外し、把手
１８を引く力を弱めると、内箱８はばね９ａ、９ｂによ
り外箱７内に収納される。主ロープ６が３本ある場合
は、同様な動作を３回繰り返すことにより、それぞれの
張力に対応する数値を表示部１７に表示させることによ
り、正確に３本の主ロープ６の張力を比較することがで
きる。At this time, the arithmetic unit 16a is operated by the memory unit 16
For example, if the preset value set in b is “5” and the value input to the calculation unit 17 is “6”, “+” is given.
1 ”is displayed on the display unit 17. In this way, after the tension of the main rope 6 is measured, the handle 18 is removed from the locking rod and the pulling force of the handle 18 is weakened, whereby the inner box 8 is stored in the outer box 7 by the springs 9a and 9b. When there are three main ropes 6, the same operation is repeated three times, and the numerical values corresponding to the respective tensions are displayed on the display unit 17, so that the tensions of the three main ropes 6 are accurately compared. be able to.
【００１５】以上のように、この発明によれば、一側面
が開口された外箱と、その外箱の開口部に対向する一側
面が開口されていて該外箱内に引き出し自在に収納され
る内箱と、上記外箱と内箱の開口部と相対向する内壁面
間に内箱を外箱内に収納する方向に付勢するようにして
固着されたばねと、上記外箱に設けられかつ外部に位置
して測定対象のロープを引っかけるためのフックと、上
記内箱に設けられかつ外部に位置して引っ張ることで内
箱を外箱から引き出し固定点に係止させるための把手
と、上記内箱と上記外箱の開口部に対向する側面に内箱
が外箱内に収納された状態で所定距離離間するようそれ
ぞれ固着された第１と第２のセンサ構成要素を有し、上
記フックを上記ロープに引っかけ上記把手を引っ張り固
定点に係止させた状態で該ロープの張力に応じて変化す
る第１と第２のセンサ構成要素間の幾何学量に応じた出
力を得る変位センサと、この変位センサの出力に基づい
て上記ロープの張力に応じた値を出力する測定部とを備
えたので、ロープの張力を数値化して求め比較すること
ができる。As described above, according to the present invention, the outer box having one side surface opened and the one side surface facing the opening portion of the outer box are opened so that the outer box can be stored in the outer box so as to be freely drawn. An inner box, a spring fixed between the outer box and an inner wall surface facing the opening of the inner box so as to bias the inner box in the outer box, and the spring provided on the outer box. And a hook that is located outside and hooks the rope to be measured, and a handle that is provided in the inner box and that is located outside and that pulls the inner box from the outer box to lock it at a fixed point, The inner box and the outer box each have first and second sensor components fixed to a side surface facing the opening of the inner box so as to be separated from each other by a predetermined distance in a state where the inner box is housed in the outer box; The hook is hooked on the rope and the handle is pulled to lock it at the fixed point. And a displacement sensor that obtains an output according to a geometric amount between the first and second sensor constituent elements that changes according to the tension of the rope, and a value corresponding to the tension of the rope based on the output of the displacement sensor. Since it is provided with a measuring section for outputting, the rope tension can be numerically calculated and compared.
【００１６】また、上記変位センサは、第１のセンサ構
成要素として差動トランスを備えると共に、第２のセン
サ構成要素として上記差動トランスの出力コイルから発
せられる交流磁界によって渦電流を引き起こす金属板を
備え、金属板との距離に応じて差動トランスの出力コイ
ルの出力が変化するように構成したので、渦電流を用い
た変位センサを構成することができ、その変位センサを
用いてロープの張力を数値化することができる。The displacement sensor includes a differential transformer as a first sensor component, and a metal plate that causes an eddy current by an AC magnetic field emitted from an output coil of the differential transformer as a second sensor component. Since the output coil of the differential transformer is configured to change according to the distance from the metal plate, it is possible to configure a displacement sensor that uses eddy current. The tension can be quantified.
【図１】 この発明に係るロープの張力測定装置の構成
を模式的に示す断面図である。FIG. 1 is a sectional view schematically showing a configuration of a rope tension measuring device according to the present invention.
【図２】 図１の動作説明図である。FIG. 2 is an operation explanatory diagram of FIG.
【図３】 従来例に係るロープの張力測定方法の説明図
である。FIG. 3 is an explanatory diagram of a rope tension measuring method according to a conventional example.
６ 主ロープ、７ 外箱、８ 内箱、９ａ、９ｂ ば
ね、１０ 差動トランス、１０ａ 入力コイル、１０ｂ
出力コイル、１１ フック、１３ 金属板、１６ 張
力測定部、１７ 表示部、１８ 把手。6 main rope, 7 outer box, 8 inner box, 9a, 9b spring, 10 differential transformer, 10a input coil, 10b
Output coil, 11 hooks, 13 metal plate, 16 tension measuring section, 17 display section, 18 grip.
Claims (2)
開口部に対向する一側面が開口されていて該外箱内に引
き出し自在に収納される内箱と、上記外箱と内箱の開口
部と相対向する内壁面間に内箱を外箱内に収納する方向
に付勢するようにして固着されたばねと、上記外箱に設
けられかつ外部に位置して測定対象のロープを引っかけ
るためのフックと、上記内箱に設けられかつ外部に位置
して引っ張ることで内箱を外箱から引き出し固定点に係
止させるための把手と、上記内箱と上記外箱の開口部に
対向する側面に内箱が外箱内に収納された状態で所定距
離離間するようそれぞれ固着された第１と第２のセンサ
構成要素を有し、上記フックを上記ロープに引っかけ上
記把手を引っ張り固定点に係止させた状態で該ロープの
張力に応じて変化する第１と第２のセンサ構成要素間の
幾何学量に応じた出力を得る変位センサと、この変位セ
ンサの出力に基づいて上記ロープの張力に応じた値を出
力する測定部とを備えたロープの張力測定装置。1. An outer box having one side surface opened, an inner box having one side surface facing the opening of the outer box opened so that the outer box can be freely pulled out, and the outer box. A spring fixed between the inner wall surfaces facing the opening of the inner box so as to urge the inner box in the direction to store the inner box in the outer box; A hook for hooking the rope, a handle for pulling the inner box out of the outer box and locking it at a fixed point provided on the inner box and located outside, and openings of the inner box and the outer box. Has a first and a second sensor component fixed to the side surface facing the part so as to be separated by a predetermined distance in a state where the inner box is housed in the outer box, and hooks the hook on the rope to hook the handle. It changes according to the tension of the rope while locked at the tension fixing point. A displacement sensor that obtains an output according to a geometric amount between the first and second sensor components, and a measuring unit that outputs a value according to the tension of the rope based on the output of the displacement sensor. Rope tension measuring device.
おいて、上記変位センサは、第１のセンサ構成要素とし
て差動トランスを備えると共に、第２のセンサ構成要素
として上記差動トランスの出力コイルから発せられる交
流磁界によって渦電流を引き起こす金属板を備え、渦電
流を用いた変位センサを構成し、上記差動トランスの出
力コイルの出力は、上記金属板との距離に応じて変化す
ることを特徴とするロープの張力測定装置。2. The rope tension measuring device according to claim 1, wherein the displacement sensor includes a differential transformer as a first sensor constituent element, and an output coil of the differential transformer as a second sensor constituent element. A displacement sensor using an eddy current is provided, which is provided with a metal plate that causes an eddy current by an alternating magnetic field emitted from the output coil of the differential transformer, and the output of the output coil changes depending on the distance from the metal plate. Characteristic rope tension measuring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22535395A JPH0972801A (en) | 1995-09-01 | 1995-09-01 | Tension measuring apparatus for rope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22535395A JPH0972801A (en) | 1995-09-01 | 1995-09-01 | Tension measuring apparatus for rope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0972801A true JPH0972801A (en) | 1997-03-18 |
Family
ID=16828017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22535395A Pending JPH0972801A (en) | 1995-09-01 | 1995-09-01 | Tension measuring apparatus for rope |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0972801A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009161302A (en) * | 2008-01-04 | 2009-07-23 | Toshiba Elevator Co Ltd | Method for adjusting rope tension of elevator |
| JP2011116511A (en) * | 2009-12-04 | 2011-06-16 | Toshiba Elevator Co Ltd | Device and method for measuring tension of elevator main rope |
| CN103318732A (en) * | 2013-07-02 | 2013-09-25 | 茆海洋 | Rope detection device and rope detection method both for elevators |
| KR20170019046A (en) * | 2015-08-11 | 2017-02-21 | 한국과학기술원 | Structure diagnosis system and method of operating structure diagnosis system |
| WO2018101626A1 (en) * | 2016-11-30 | 2018-06-07 | 한국과학기술원 | Sensor for monitoring tendon tensile strength and tendon tensile strength diagnosis system using same |
| CN110104519A (en) * | 2019-05-29 | 2019-08-09 | 胡战生 | A kind of detection device for mechanical detection accidental movement of elevator cage |
-
1995
- 1995-09-01 JP JP22535395A patent/JPH0972801A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009161302A (en) * | 2008-01-04 | 2009-07-23 | Toshiba Elevator Co Ltd | Method for adjusting rope tension of elevator |
| JP2011116511A (en) * | 2009-12-04 | 2011-06-16 | Toshiba Elevator Co Ltd | Device and method for measuring tension of elevator main rope |
| CN103318732A (en) * | 2013-07-02 | 2013-09-25 | 茆海洋 | Rope detection device and rope detection method both for elevators |
| KR20170019046A (en) * | 2015-08-11 | 2017-02-21 | 한국과학기술원 | Structure diagnosis system and method of operating structure diagnosis system |
| WO2018101626A1 (en) * | 2016-11-30 | 2018-06-07 | 한국과학기술원 | Sensor for monitoring tendon tensile strength and tendon tensile strength diagnosis system using same |
| KR20180061869A (en) * | 2016-11-30 | 2018-06-08 | 한국과학기술원 | Sensor for monitoring tendon force, and system for analyzing tendon force using the same |
| CN110104519A (en) * | 2019-05-29 | 2019-08-09 | 胡战生 | A kind of detection device for mechanical detection accidental movement of elevator cage |
| CN110104519B (en) * | 2019-05-29 | 2021-05-18 | 胡战生 | Detection device for mechanically detecting accidental movement of elevator car |
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