JPH0196507A - Distance detecting device - Google Patents
Distance detecting deviceInfo
- Publication number
- JPH0196507A JPH0196507A JP25357887A JP25357887A JPH0196507A JP H0196507 A JPH0196507 A JP H0196507A JP 25357887 A JP25357887 A JP 25357887A JP 25357887 A JP25357887 A JP 25357887A JP H0196507 A JPH0196507 A JP H0196507A
- Authority
- JP
- Japan
- Prior art keywords
- guide tube
- distance
- torch
- reference surface
- reflected
- 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.)
- Granted
Links
- 238000005259 measurement Methods 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 9
- 239000012809 cooling fluid Substances 0.000 claims 1
- 238000003466 welding Methods 0.000 description 23
- 239000000463 material Substances 0.000 description 17
- 238000010586 diagram Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000011324 bead Substances 0.000 description 3
- 239000010953 base metal Substances 0.000 description 2
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 229920001817 Agar Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は超音波を用いて距離を検出する装置に係わり、
例えば、消耗電極を用いたアーク溶接中にトーチと被溶
接物間の距離を一定に保つに好適な距離検出装置に関す
る。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for detecting distance using ultrasonic waves.
For example, the present invention relates to a distance detection device suitable for maintaining a constant distance between a torch and a workpiece during arc welding using a consumable electrode.
消耗電極を用いたアーク溶接の自動制御を進める上で、
溶接トーチと装置ビード表面との間隔を一定に保つこと
は不可欠である。しかし、被溶接物（母材）表面を倣っ
て溶接トーチの位置決めを行う、いわゆる上下倣いにつ
いてはなかなか実用的な検出装置が無くて困っているの
が実状である。In advancing automatic control of arc welding using consumable electrodes,
It is essential to maintain a constant distance between the welding torch and the equipment bead surface. However, the current situation is that there is no practical detection device for so-called vertical scanning, in which the welding torch is positioned by tracing the surface of the workpiece (base metal).
第９図は実用されている代表的な上下倣いセンサとして
、接触式のセンサを示した説明図である。FIG. 9 is an explanatory diagram showing a contact type sensor as a typical vertical scanning sensor in practical use.
同図に示すように、上下倣いセンサのボディ１は溶接ト
ーチ２と一体に動くようにトーチ２に連結されている。As shown in the figure, a body 1 of the vertical scanning sensor is connected to a welding torch 2 so as to move together with the welding torch 2.
母材表面３に接触棒４の先端を接触させ、センサ・ボデ
ィ１の内部に接触棒４の支点５を設けて置き、てこの原
理で接触棒４の他端の移動量を２個のリミットスイッチ
６．７で検出し、トーチ２と母材表面３間の距離が近す
ぎるとき、下限リミットスイッチ６がｏｎとなり、トー
チ２を上昇させる。逆にトーチ２と母材表面３間の距離
が遠すぎるとき、上限リミットスイッチ７がＯｎとなり
、トーチ２を下降する。この様にしてトーチ２と母材表
面３間の距離を自動的に一定に保つようにしている。The tip of the contact rod 4 is brought into contact with the base material surface 3, the fulcrum 5 of the contact rod 4 is provided inside the sensor body 1, and the amount of movement of the other end of the contact rod 4 is limited by two limits using the lever principle. When the distance between the torch 2 and the base material surface 3 is too short as detected by the switch 6.7, the lower limit switch 6 is turned on and the torch 2 is raised. Conversely, when the distance between the torch 2 and the base material surface 3 is too long, the upper limit switch 7 is turned on and the torch 2 is lowered. In this way, the distance between the torch 2 and the base material surface 3 is automatically kept constant.
しかし、通常、接触棒４の先端は、アーク８による加熱
・溶融を避け、またスパッタ付着を避けるために、溶接
進行方向に溶融池９から２０ｇＩｒ５以上離れた点を倣
っている。However, normally, the tip of the contact rod 4 is located at a point 20 gIr5 or more away from the molten pool 9 in the direction of welding progress in order to avoid heating and melting by the arc 8 and to avoid adhesion of spatter.
この様に、実際にアーク８が発生している所とは違う場
所を倣っているので、たとえば、第１０図に示すように
、厚肉管を回転しながら多層溶接している場合などで、
装置ビードのスタート部９に重ねてビードを置く時には
、接触棒４が先に重ね部に到達してそこでトーチ２を上
昇させる信号を形成するので、トーチ２は重ね部に到達
する前に上昇し、このためトーチ２と母材表面３間の間
隔を一定に保つ事ができなくなる。In this way, since the location where the arc 8 is actually generated is imitated, for example, as shown in FIG. 10, when multi-layer welding is being performed while rotating a thick-walled pipe,
When placing a bead overlapping the starting part 9 of the device bead, the contact rod 4 reaches the overlapping part first and generates a signal there to raise the torch 2, so that the torch 2 rises before reaching the overlapping part. Therefore, it becomes impossible to maintain a constant distance between the torch 2 and the base material surface 3.
この問題を解決するためには、接触棒４とアーク８間の
距離と溶接速度を勘案して時間遅れ信号を形成すること
が考えられるが、マイコンを用いた記憶・演算制御が必
要となり、またセンサボディ１とトーチ２は別々に動く
構造としなければならず、複雑かつ高価な制御装置とな
るので、実用されることは希れであった。又、接触棒４
は母材忙急激な凹凸が有ると引掛りを生じてしばしば損
傷することがあった。これらの事から、接触棒４を用い
た上下倣いは、主に大きなうねり的な変化に対応する場
合に有効な手段として使用されている。In order to solve this problem, it is possible to form a time-delayed signal by taking into account the distance between the contact rod 4 and the arc 8 and the welding speed, but this requires memory and calculation control using a microcomputer, and also The sensor body 1 and the torch 2 must be structured to move separately, resulting in a complicated and expensive control device, so it has rarely been put to practical use. Also, contact rod 4
When the base material has sharp irregularities, it often gets caught and gets damaged. For these reasons, vertical scanning using the contact rod 4 is mainly used as an effective means for dealing with large undulation-like changes.
他の実用的な上下倣いに、第１１図で説明するアークセ
ンサ法が知られている。アーク用電源の出力電圧および
ワイヤ送給速度を一定に保っておき、ワイヤ１０の突出
し長さｅが増すと、そこでの電圧降下が増すためにアー
ク電流が減少することから。Another practical example of vertical scanning is the arc sensor method described in FIG. 11. This is because when the output voltage and wire feeding speed of the arc power source are kept constant and the protrusion length e of the wire 10 increases, the voltage drop there increases and the arc current decreases.
コンタクトチップ１１と母材３間の距離が長くなったこ
とを検出する方法である。この方法によると。This is a method of detecting that the distance between the contact tip 11 and the base material 3 has become longer. According to this method.
アーク８発生部でのトーチ２と母材３間の距離を一定に
保つことが出来る。The distance between the torch 2 and the base material 3 at the arc 8 generation part can be kept constant.
しかし、実際にはコンタクトチップ１１におけるワイヤ
１０への接触通電点１２と母材３間δ距離を一定に保と
うとするものであることから、ワイヤ１０が通過スるコ
ンタクトチップ１１の穴が摩耗で損傷したり、あるいは
ワイヤ１００曲り癖が変化したりすると、接触通電点１
２の位置が安定せず、それが距離の変化として検出され
てしまい、結局、上下倣いは非常に不安定になることが
あった。このことは、第１２図に示すような波形の塑性
変形をワイヤ１０に与えながら溶接することを特徴とす
る特公昭６０−５０５４４号の狭開先溶接法の場合には
、より一層通電点１２が安定しないために、このアーク
センサ法の適用は困難であった。However, in reality, the distance δ between the contact energizing point 12 of the contact tip 11 to the wire 10 and the base metal 3 is to be kept constant, so the hole in the contact tip 11 through which the wire 10 passes may be worn out. If the wire 100 is damaged or the bending tendency of the wire 100 changes, the contact current point 1
2 is not stable, and this is detected as a change in distance, and as a result, vertical scanning becomes extremely unstable. This is even more true in the case of the narrow gap welding method disclosed in Japanese Patent Publication No. 60-50544, which is characterized in that welding is performed while applying waveform plastic deformation to the wire 10 as shown in FIG. It was difficult to apply this arc sensor method because of the instability of the arc sensor method.
上記の従来技術の一つはアーク８発生部から相当に離れ
た点でのトーチ２と母材３間の距離を検出していると言
う問題、そして他の一つはコンタクトチップ１１におけ
るワイヤ１０への通電点１２が始終変化するような波形
に塑性変形したワイヤ１０を用いた狭開先溶接等の場合
には使用出来ないと言う問題があった。One problem with the above-mentioned prior art is that the distance between the torch 2 and the base material 3 is detected at a point considerably away from the arc 8 generating part, and the other problem is that the distance between the torch 2 and the base material 3 is detected at a point considerably away from the arc 8 generating part, and the other problem is that There is a problem in that it cannot be used in cases such as narrow gap welding using a wire 10 that has been plastically deformed into a waveform in which the energizing point 12 changes over time.
本発明の目的は、前述したような従来技術の欠点を解消
し、簡単な構成でかつ正確に距離が検出できる距離検出
装置を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the prior art as described above and to provide a distance detection device that has a simple configuration and can accurately detect distance.
前述の目的を達成するため、本発明は、超音波パルスを
送受信する送受信回路と、送信された超音波パルスを測
定面に案内する中空状の案内管と、その案内管と一体く
設けられた反射基準面部と、前記送受信回路から送信さ
れた超音波パルスの一部が反射基準面部で反射して送受
信回路に到達する時間ならびに超音波パルスの一部が測
定面で反射して送受信回路に到達する時間の差から反射
基準面部と測定面との距離を検出する検出部とを備えて
いることを特徴とするものである。In order to achieve the above object, the present invention provides a transceiver circuit that transmits and receives ultrasonic pulses, a hollow guide tube that guides the transmitted ultrasonic pulses to a measurement surface, and a device that is provided integrally with the guide tube. Reflection reference plane part and the time during which a part of the ultrasonic pulse transmitted from the transmission/reception circuit is reflected by the reflection reference plane part and reaches the transmission/reception circuit, and a part of the ultrasonic pulse is reflected by the measurement surface and reaches the transmission/reception circuit. The present invention is characterized in that it includes a detection section that detects the distance between the reflective reference surface section and the measurement surface from the difference in time between the reflection reference surface section and the measurement surface.
第１図は、本発明の機器の動作原理を説明する為の構成
図である。本発明に使用する超音波回路は、超音波パル
スを形成するための信号発生回路１３、超音波を送受信
する圧電素子１４、受信信号から距離を検知する信号処
理回路１５およびこれらをつなぐ送受信線１６から構成
されている。圧電素子１４がら空中に発信された超音波
パルスは、ホーン部１７を介して案内管１８に入って案
内管１８の端部に到達し、超音波パルスの一部はそと忙
設けられた反射基準面部となる突起部１９に当たって反
射し、案内管１８にそって圧電素子１４に戻ってくる。FIG. 1 is a configuration diagram for explaining the operating principle of the device of the present invention. The ultrasonic circuit used in the present invention includes a signal generation circuit 13 for forming ultrasonic pulses, a piezoelectric element 14 for transmitting and receiving ultrasonic waves, a signal processing circuit 15 for detecting distance from a received signal, and a transmission/reception line 16 connecting them. It consists of The ultrasonic pulses emitted into the air by the piezoelectric element 14 enter the guide tube 18 via the horn section 17 and reach the end of the guide tube 18, and a part of the ultrasonic pulses is reflected by a The light hits the protrusion 19 that serves as a reference surface and is reflected, and returns to the piezoelectric element 14 along the guide tube 18 .
残りの超音波パルスは案内管１８の端部から外に出て、
突起部１９の反射面から距離ｇ離れた所にある測定面２
０に当たって反射し、再び案内管１８に戻ってきて、圧
電素子１４に戻ってくる。これ等の戻ってきた超音波パ
ルスは圧電素子１４で受信し、信号処理回路１５にて、
その到達時間差から距離ｇを求めている。The remaining ultrasonic pulses exit from the end of the guide tube 18;
Measurement surface 2 located at a distance g from the reflective surface of the protrusion 19
0, it is reflected, returns to the guide tube 18, and returns to the piezoelectric element 14. These returned ultrasonic pulses are received by the piezoelectric element 14 and sent to the signal processing circuit 15.
The distance g is calculated from the arrival time difference.
第２図は、圧電素子１４で検出した超音波パルス信号の
測定例を示している。信号の各ピークは送信パルス２１
、ホーン部でのエコー２２、突起部１９カらのエコー２
３および測定面２０からのエコー２４を示している。こ
れ等のうち、送信パルス２１およびホーン部エコー２２
はタイミング的にゲートを掛けて除外し、突起部１９か
らのエコー２３が到達してから測定面エコー２４が到達
するまでの時間Δｔを検出することは容易である。この
様にして、超音波パルス発生部から相当に離れた場所で
あっても、端部に突起部１９を設けた案内管１８を用い
ることによって、突起部１９か、ら測定面２０までの距
離ｇが、空気中の音速をもとに、確度よく求められる。FIG. 2 shows an example of measurement of an ultrasonic pulse signal detected by the piezoelectric element 14. Each peak of the signal is a transmitted pulse 21
, echo 22 from the horn section, echo 2 from the protrusion 19
3 and echoes 24 from the measurement surface 20 are shown. Among these, the transmission pulse 21 and the horn section echo 22
It is easy to exclude by applying a timing gate and detect the time Δt from when the echo 23 from the protrusion 19 arrives until when the measurement surface echo 24 arrives. In this way, even if the location is quite far from the ultrasonic pulse generator, by using the guide tube 18 with the protrusion 19 at the end, the distance from the protrusion 19 to the measurement surface 20 can be adjusted. g can be determined with high accuracy based on the speed of sound in the air.
第３図に狭開先溶接トーチに組込んだ実施例を示す。超
音波パルス発生回路１３は１００ｋＨｚで５波の超音波
パルスを１００ｍ５毎に発生し、圧電素子１４に印加し
ている。ホーン部１７を介して出来るだけ案内管１８内
に強い音波を入れるようにと、外径３０■の圧電素子１
４は凹面を形成している。そしてホーン部１７の側面か
らシールドガスな入れ、内径８−１長さ約３００１１１
１のビニールホースを第一案内管２５として用いて、狭
開先溶接トーチ２６の長さ約２００ ｆｉの先行シール
ドガス管２７を第２の案内管としてつないでいる。先行
シールドガス管２７は内断面積が約２５−でトーチ２６
の厚さを６Ｗ以下にするために楕円形をしているが、そ
のアーク側の出口近傍に高さＩＩＩＩｍの突起部２８を
設けている。FIG. 3 shows an embodiment in which it is incorporated into a narrow gap welding torch. The ultrasonic pulse generation circuit 13 generates five ultrasonic pulses at 100 kHz every 100 m5 and applies them to the piezoelectric element 14. In order to introduce as strong a sound wave as possible into the guide tube 18 through the horn part 17, a piezoelectric element 1 with an outer diameter of 30 cm was used.
4 forms a concave surface. Then, enter the shield gas from the side of the horn part 17, inner diameter 8-1 length approximately 300111
A vinyl hose of No. 1 is used as a first guide pipe 25, and a leading shield gas pipe 27 having a length of about 200 fi is connected to a narrow gap welding torch 26 as a second guide pipe. The leading shield gas pipe 27 has an internal cross-sectional area of approximately 25 mm and the torch 26
In order to keep the thickness to 6W or less, it has an elliptical shape, and a protrusion 28 with a height of IIIm is provided near the exit on the arc side.
その他は通常用いている特公昭６０−５０５４４号等に
ある狭開先溶接用のトーチと変りなく、先行シールドガ
ス管２７の他、ワイヤ１２を案内するガイドチューブ２
９、その先端に取付けたコンタクトチップ３０．水冷管
３１、および後方シールドガス管３２等の鋼管を一体に
して、トーチ２６を構成している。The rest is the same as the normally used torch for narrow gap welding in Japanese Patent Publication No. 60-50544, etc. In addition to the leading shield gas pipe 27, the guide tube 2 that guides the wire 12
9. Contact tip 30 attached to its tip. The torch 26 is constructed by integrating steel pipes such as the water cooling pipe 31 and the rear shield gas pipe 32.
圧電素子１４から発射された超音波パルスは実際には軟
らかく、そして超音波に対しては剛体的であるビニール
ホースな超音波の第１案内管２５として用いているので
、圧電素子１４は溶接トーチ２６から少し離れた所に置
くことが出来る。そして先行シールド管２７を第２案内
管として用いているので、超音波はアーク８のごく近い
所にまで案内され、そこでシールド管２７出口と母材３
３間の距離ｇを検知することができる。The ultrasonic pulse emitted from the piezoelectric element 14 is actually soft, and since it is used as the first guide tube 25 of the ultrasonic wave, which is a vinyl hose that is rigid with respect to the ultrasonic wave, the piezoelectric element 14 is used as a welding torch. It can be placed a little far away from 26. Since the leading shield tube 27 is used as the second guide tube, the ultrasonic waves are guided to a place very close to the arc 8, where the shield tube 27 exit and the base material 3
3 can be detected.
狭開先溶接するときには、距離ｇは例えば１５鵡±２１
１１に保つことが要求される。このとき、第２図に示し
た突起部エコー２３と母材３３からのエコー２４との到
達時間間隔は８０ｐｓ程度となっている。実際には、ト
ーチ２６の上下位置をいちいち距離に換算してｇの大小
として考えるのではなく、溶接士は基準となる到達時間
間隔を指定し、その値との大小で、溶接トーチ２６が母
材３３に近付き過ぎているか、離れ過ぎているかを検知
し、溶接トーチ２６を自動的に上下して、所定到達時間
間隔になるように制御している。When performing narrow gap welding, the distance g is, for example, 15 mm ± 21 mm.
11 is required. At this time, the arrival time interval between the protrusion echo 23 and the echo 24 from the base material 33 shown in FIG. 2 is about 80 ps. In reality, instead of converting the vertical position of the torch 26 into a distance and considering it as the magnitude of g, the welder specifies a reference arrival time interval, and the welding torch 26 is It is detected whether the welding torch 26 is too close to or too far away from the material 33, and the welding torch 26 is automatically moved up and down to control the welding torch 26 to reach a predetermined time interval.
超音波の気体中での音速は、温度の影響を大きく受ける
。しかし、２つのパルスの到達時間間隔は極めて短いの
で、案内管２５ 、２７内部での温度変化の影響はほと
んど受けない。一方、シールドノズル２７の外部に出て
母材３３から反射してくる途中では、温度変化の影響を
受ける可能性が有る。実際には前方シールドノズル２７
から母材３３に向けて６ｍ１ｓｅｃ程度の流速でシール
ドガスを吹付けていて、その中を超音波パルスが通過す
るので、これＫよっても温度変化の影糧は少なくなって
いる。The sound speed of ultrasound in gas is greatly affected by temperature. However, since the time interval between the arrival of the two pulses is extremely short, it is hardly affected by temperature changes inside the guide tubes 25 and 27. On the other hand, on the way to the outside of the shield nozzle 27 and reflected from the base material 33, there is a possibility that it will be affected by temperature changes. Actually the front shield nozzle 27
Since the shielding gas is sprayed from the base material 33 at a flow rate of about 6 ml/sec, and the ultrasonic pulse passes through the shielding gas, the effects of temperature changes are reduced even with this K.
尚、シールドガスの流れの中を超音波パルスが往復する
ので、ドツプラー効果に基づく音の伝ばん速度の変化は
、往路と復路とで、相殺されてしまう。第３図の装置を
用いたとき、実際の上下倣いの精度は±２園の範囲に収
まっており、十分に実用することができた。Note that since the ultrasonic pulse reciprocates in the flow of the shielding gas, changes in the sound propagation speed due to the Doppler effect are canceled out on the outward and return paths. When the apparatus shown in Fig. 3 was used, the accuracy of the actual vertical scanning was within the range of ±2 degrees, and it was sufficiently usable for practical use.
なお、母材表面での超音波の反射を利用しているので、
母材表面の凹凸が激しいときには、反射波が戻って来な
い場合がある。その時には、次に反射波を検知するまで
、図示していないトーチ駆動制御回路で、トーチを一定
に保持する様に制御している。In addition, since it uses the reflection of ultrasonic waves on the surface of the base material,
When the surface of the base material is extremely uneven, the reflected waves may not return. At that time, a torch drive control circuit (not shown) controls the torch to be held constant until the next reflected wave is detected.
また、案内管出口の面積は、反射して戻ってきた超音波
パルスの受入れ口ともなるので、案内管出口の面積が狭
いと、反射パルスの検出能力が小さ（なる。また、測定
する距離ｇが遠すぎても検出できなくなる。上記の実施
例の場合には、検出できる距離は５０１１１１１程度ま
でで有った。In addition, the area of the guide tube exit also serves as a receiving port for the reflected and returned ultrasonic pulses, so if the area of the guide tube exit is narrow, the detection ability of reflected pulses will be small (also, the distance to be measured g If it is too far away, it cannot be detected.In the case of the above embodiment, the detectable distance was up to about 50111111111.
第４図は、本発明を通常の消耗電他アーク用トーチ３４
に組合わせて上下倣い出来る様にした実施例である。第
１図に示した案内管１８をトーチの直ぐ脇に配置してい
る。この場合には、案内管１８にはガスを流す必要はな
い。この様にして、一般のアーク溶接用の上下倣いセン
サとして使用できる。FIG. 4 shows the present invention in a conventional consumable arc torch 34.
This is an embodiment in which vertical copying is possible in combination with the above. A guide tube 18 shown in FIG. 1 is placed immediately beside the torch. In this case, there is no need for gas to flow through the guide tube 18. In this way, it can be used as a vertical scanning sensor for general arc welding.
また、第１図の構成の装置を５０１１１１以下の非接触
方式距離検出センサとして使用することも出来る。Further, the device having the configuration shown in FIG. 1 can also be used as a non-contact type distance detection sensor of 501111 or less.
第５図は２組の案内管３５ 、３６の先端をトーチ３４
を挾んで直角に配置して直交する２壁面を倣うことＫよ
り、隅肉溶接線の倣いに適用した例である。Figure 5 shows the tips of the two sets of guide tubes 35 and 36 being connected to
This is an example of application to copying a fillet weld line, which is based on copying two orthogonal wall surfaces by sandwiching them and placing them at right angles.
第６図ないし第８図は、反射基準面部の変形例を説明す
るための図である。前記実施例に係る反射基準面部（突
起部１９）は案内管１８の開口部付近の内側に環状に設
けたが、第６図の変形例の場合、案内管１８の開口部付
近の内側にほぼ三日月状の突起１９を設けた。FIGS. 6 to 8 are diagrams for explaining modified examples of the reflective reference surface section. The reflective reference surface portion (protrusion 19) according to the above embodiment was provided in an annular shape inside near the opening of the guide tube 18, but in the case of the modified example shown in FIG. A crescent-shaped protrusion 19 was provided.
第７図の変形例の場合、案内管１８の一部を内側に切起
こして突起部１９を形成した。第８図の変形例の場合、
案内管１８の開口部から若干外側に連結部材１９ｂを介
して突起部１９ａを設けた。In the case of the modification shown in FIG. 7, a part of the guide tube 18 is cut and raised inward to form a protrusion 19. In the case of the modified example shown in Fig. 8,
A protrusion 19a is provided slightly outward from the opening of the guide tube 18 via a connecting member 19b.
本発明は前述のような構成になっており、非接触状態で
距離の検出ができ、しかも構成が簡単でかつ正確に距離
の検出が可能である。特に、前記実施例で示したように
シールドガスノズルを案内管として兼用できるので、狭
開先溶接の上下倣いセンサとして有効である。The present invention has the above-mentioned configuration, and can detect distance in a non-contact state, has a simple configuration, and can accurately detect distance. In particular, as shown in the above embodiment, the shield gas nozzle can also be used as a guide tube, so it is effective as a vertical scanning sensor for narrow gap welding.
第１図は本発明の実施例に係る距離検出装置の概略構成
図、第２図はその装置の信号波形図、第３図はその装置
の応用例を示す概略構成図、第４図ならびに第５図は例
の応用例を示す説明図、第６図、第７図ならびに＠８図
はその装置の反射基準面部の変形例を示す断面図である
。第９図、第１０図ならびに第１１図は従来の上下倣い
センサの説明図、第１２図は波形ワイヤの平面図である
。
１３・・・・・・信号発生回路、１４・・・・・・圧電
素子、１５・・・・・・信号処理回路、１６・・・・・
・送受信線、１７・・・・・・ホーン部。
１８・・・・・・案内管、１９・・・・・・突起部、２
０・・・・・・測定面。
第１図
第２図
第３図
一名刊糺まｉテ万４司
第４図
第５図
第６図
第７図
〕９
第８図
９ａ
第９図
第１０図FIG. 1 is a schematic configuration diagram of a distance detection device according to an embodiment of the present invention, FIG. 2 is a signal waveform diagram of the device, FIG. 3 is a schematic configuration diagram showing an application example of the device, and FIGS. FIG. 5 is an explanatory diagram showing an example of application, and FIGS. 6, 7, and 8 are cross-sectional views showing modifications of the reflective reference surface portion of the device. 9, 10, and 11 are explanatory diagrams of conventional vertical scanning sensors, and FIG. 12 is a plan view of a corrugated wire. 13... Signal generation circuit, 14... Piezoelectric element, 15... Signal processing circuit, 16...
・Transmission/reception line, 17...Horn part. 18...Guide tube, 19...Protrusion, 2
0...Measurement surface. Fig. 1 Fig. 2 Fig. 3 Ichimei Kanten Maite Man 4 Tsuji Fig. 5 Fig. 6 Fig. 7] 9 Fig. 8 9a Fig. 9 Fig. 10
Claims (4)
れた超音波パルスを測定面に案内する中空状の案内管と
、その案内管と一体に設けられた反射基準面部と、前記
送受信回路から送信された超音波パルスの一部が反射基
準面部で反射して送受信回路に到達する時間ならびに超
音波パルスの一部が測定面で反射して送受信回路に到達
する時間の差から反射基準面部と測定面との距離を検出
する検出部とを備えていることを特徴とする距離検出装
置。(1) A transmitting/receiving circuit that transmits and receives ultrasonic pulses, a hollow guide tube that guides the transmitted ultrasonic pulses to a measurement surface, a reflective reference surface portion provided integrally with the guide tube, and a transmitting/receiving circuit that The reflection reference surface and A distance detection device comprising: a detection section that detects a distance to a measurement surface.
射基準面部が案内管の内側に設けられていることを特徴
とする距離検出装置。(2) The distance detecting device according to claim (1), wherein the reflective reference surface portion is provided inside a guide tube.
射基準面部が案内管の開口付近に設けられていることを
特徴とする距離検出装置。(3) The distance detecting device according to claim (1), wherein the reflective reference surface portion is provided near the opening of the guide tube.
内管内を冷却流体が流通するように構成されていること
を特徴とする距離検出装置。(4) The distance detecting device according to claim (1), characterized in that a cooling fluid flows through the guide tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62253578A JP2656507B2 (en) | 1987-10-09 | 1987-10-09 | Distance detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62253578A JP2656507B2 (en) | 1987-10-09 | 1987-10-09 | Distance detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0196507A true JPH0196507A (en) | 1989-04-14 |
| JP2656507B2 JP2656507B2 (en) | 1997-09-24 |
Family
ID=17253322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62253578A Expired - Lifetime JP2656507B2 (en) | 1987-10-09 | 1987-10-09 | Distance detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2656507B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0525309U (en) * | 1991-04-12 | 1993-04-02 | 安藤電気株式会社 | Calibration circuit of distance measuring device by sound wave |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS48100166A (en) * | 1972-03-31 | 1973-12-18 | ||
| JPS5841322A (en) * | 1981-09-04 | 1983-03-10 | Toshiba Corp | Ultrasonic wave interface measuring device |
-
1987
- 1987-10-09 JP JP62253578A patent/JP2656507B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS48100166A (en) * | 1972-03-31 | 1973-12-18 | ||
| JPS5841322A (en) * | 1981-09-04 | 1983-03-10 | Toshiba Corp | Ultrasonic wave interface measuring device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0525309U (en) * | 1991-04-12 | 1993-04-02 | 安藤電気株式会社 | Calibration circuit of distance measuring device by sound wave |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2656507B2 (en) | 1997-09-24 |
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