JPH0230645B2 - - Google Patents
Info
- Publication number
- JPH0230645B2 JPH0230645B2 JP58113919A JP11391983A JPH0230645B2 JP H0230645 B2 JPH0230645 B2 JP H0230645B2 JP 58113919 A JP58113919 A JP 58113919A JP 11391983 A JP11391983 A JP 11391983A JP H0230645 B2 JPH0230645 B2 JP H0230645B2
- Authority
- JP
- Japan
- Prior art keywords
- thickness
- measuring
- heat
- thermistor
- voltage
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Description
【発明の詳細な説明】
〔技術分野〕
本発明は、建築物のコンクリートパネル等の間
に充填されるシーリング材等の厚みを計測するの
に用いられる厚み計測装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a thickness measuring device used to measure the thickness of a sealant, etc. filled between concrete panels, etc. of a building.
建築物の施工において、レンガやコンクリート
ブロツク等を組積する場合、接合部分には、各ブ
ロツクの熱膨張・収縮あるいはそりによつて応力
が作用するので、この応力を軽減する為に目地が
形成される。
When constructing a building, when bricks, concrete blocks, etc. are assembled, stress is applied to the joints due to thermal expansion, contraction, or warping of each block, so joints are formed to reduce this stress. be done.
この目地部分をシールするために、第１図に示
すように、コンクリート１の間の目地２に、発泡
材にてなる充填材３を充填することが行なわれ
る。充填材３は、表面側のシーリング層３ａと基
材３ｂの２層で構成される。シーリング材３ａ
は、外観と強度上の問題から、密度の高い高価な
材料が用いられ、また、内側基材３ｂは、密度が
低い多孔性の材料が用いられる。 In order to seal this joint, as shown in FIG. 1, the joint 2 between the concrete 1 is filled with a filler 3 made of a foam material. The filler 3 is composed of two layers: a sealing layer 3a on the surface side and a base material 3b. Sealing material 3a
For reasons of appearance and strength, a high-density and expensive material is used, and the inner base material 3b is made of a low-density porous material.
この種の充填材３は、シーリング材３ａが一定
以上の厚さを必要とするが、この充填材３が目地
２に充填された後ではコンクリート１で囲まれて
しまうので、シーリング材３ａの厚さを目視で計
ることはできない。 This type of filler 3 requires the thickness of the sealant 3a to be at least a certain level, but after the filler 3 is filled into the joint 2, it is surrounded by the concrete 1, so the thickness of the sealant 3a is It is not possible to measure it visually.
その為、従来では、超音波厚み計等を使用して
シーリング材の厚みを計測することが試みられた
が、シーリング材が粘性に富んでおり計測できな
かつた。この為、従来では、精度および経済性が
悪い破壊試験が、シーリング材の厚みを計測する
唯一の方法であつた。 Therefore, in the past, attempts have been made to measure the thickness of the sealant using an ultrasonic thickness meter or the like, but the sealant is highly viscous and cannot be measured. For this reason, conventionally, the only method for measuring the thickness of a sealing material was a destructive test that was not accurate or economical.
本発明の目的は、従来の破壊試験によらなくて
も、目地に充填される部材のように、異なる複数
の材料を接合して形成された部材の各材料の厚み
を正確かつ容易に計測できる厚み計測装置を提供
することにある。
An object of the present invention is to accurately and easily measure the thickness of each material of a member formed by joining a plurality of different materials, such as a member filled in a joint, without using conventional destructive testing. An object of the present invention is to provide a thickness measuring device.
本発明は、各材料の熱伝導性の差に着目して、
自己加熱機能を備えた感熱素子を先端に有する探
針を各材料の接合面に向けて部材に挿入して、こ
の感熱素子の温度変化率が各材料の熱伝導性に依
存していることから、この温度変化を検出するこ
とによつて挿入された探針の先端部分の材料を検
知して、探針の挿入長さより各材料の厚みを計測
しようとするものである。本発明の厚み計測装置
は、熱伝導度が異なる少なくとも２つの材料は重
ねて形成された部材の一方の厚みを計測する厚み
計測装置であつて、上記部材に挿入し得る計測針
と、この計測針の先端部に内設され定電圧を印加
することによつて一定量の発熱をさせることがで
き、かつ温度によつて電気抵抗が変化することか
ら、その電気抵抗を測ることによつて温度を検知
することができる感熱素子と、この感熱素子の電
気抵抗の変化を示す出力信号が急変したことを検
出する回路を備えたことを特徴とする。
The present invention focuses on the difference in thermal conductivity of each material, and
A probe with a heat-sensitive element at its tip that has a self-heating function is inserted into the member toward the joint surface of each material, and the temperature change rate of this heat-sensitive element depends on the thermal conductivity of each material. By detecting this temperature change, the material at the tip of the inserted probe is detected, and the thickness of each material is measured from the inserted length of the probe. The thickness measuring device of the present invention is a thickness measuring device that measures the thickness of one of a member formed by overlapping at least two materials having different thermal conductivities, and includes a measuring needle that can be inserted into the member, and a measuring needle that can be inserted into the member. By applying a fixed voltage to the tip of the needle, a certain amount of heat can be generated, and since the electrical resistance changes depending on the temperature, the temperature can be determined by measuring the electrical resistance. The present invention is characterized by comprising a heat-sensitive element capable of detecting a change in electrical resistance of the heat-sensitive element, and a circuit that detects a sudden change in an output signal indicating a change in electrical resistance of the heat-sensitive element.
第２図および３図において、４は、先端に感熱
素子としてサーミスタ５が装着された探針であ
り、探針４は、目地に充填されたシーリング材３
の厚みよりも十分に大きな長さを有する。また、
探針４の内部は中空になつており、図示しない２
本の被覆導線が探針４内に挿入されており、この
導線の一端はサーミスタ５に接続されるととも
に、他端は詳細後述の電気回路に接続されてい
る。
In FIGS. 2 and 3, 4 is a probe with a thermistor 5 attached as a heat-sensitive element at the tip, and the probe 4 is connected to a sealing material 3 filled in the joint.
It has a length that is sufficiently larger than its thickness. Also,
The inside of the probe 4 is hollow, and there is a hole 2 (not shown) inside the probe 4.
A coated conducting wire is inserted into the probe 4, and one end of this conducting wire is connected to a thermistor 5, and the other end is connected to an electric circuit which will be described in detail later.
６は、探針４がその内面と接触しないように挿
入された円筒形状の金属管であり、金属管６の先
端は、シーリング材３に挿入しやすいように斜め
に切断されている。サーミスタ５は、金属管６の
先端部にある。７は、サーミスタ５が発する熱を
金属管６へ伝導させない為の断熱材であり、断熱
材７は、探針４のサーミスタ５の近傍の部分と金
属管６との間に設けられている。 Reference numeral 6 denotes a cylindrical metal tube into which the probe 4 is inserted so as not to come into contact with its inner surface, and the tip of the metal tube 6 is cut diagonally so that it can be easily inserted into the sealing material 3. The thermistor 5 is located at the tip of the metal tube 6. Reference numeral 7 denotes a heat insulating material for preventing heat generated by the thermistor 5 from being conducted to the metal tube 6, and the heat insulating material 7 is provided between a portion of the probe 4 near the thermistor 5 and the metal tube 6.
断熱材７を設ける代わりに、第４図に示すよう
に、サーミスタ５を放熱させる多数の通風孔８
を、金属管６の先端部近傍に形成してもよい。 Instead of providing the heat insulating material 7, as shown in FIG.
may be formed near the tip of the metal tube 6.
上記の構造を有する金属管６が、第１図に示す
ように、目地２に充填されたシーリング材３ａの
表面に垂直に挿入され、金属管６先端のサーミス
タ５の熱抵抗変化により、シーリング材３ａと基
材３ｂとの接合位置が検出される。 The metal tube 6 having the above structure is inserted perpendicularly to the surface of the sealant 3a filled in the joint 2, as shown in FIG. The joining position between 3a and base material 3b is detected.
第５図には、その抵抗変化を検出する電気回路
９が示されている。電気回路９において、サーミ
スタ５は、抵抗Ｒ１，Ｒ２，Ｒ３とともにホイー
トストンブリツジを形成する。抵抗Ｒ１とサーミ
スタ５との中継点Ａは、演算増幅器OP１の反転
入力端子に接続されるとともに、抵抗R2と抵抗
R3の中継点Ｂは、演算増幅器OP１の非反転入力
端子に接続される。そして、サーミスタ５の抵抗
Rsの変化が、演算増幅器OP１において、中継点
Ａの電位VAと中継点Ｂの電位VBとの間の電位差
VB−VAとして検出され、電位差VB−VAが、演算
増幅器OP１から出力される。 FIG. 5 shows an electric circuit 9 for detecting the resistance change. In the electrical circuit 9, the thermistor 5 forms a Wheatstone bridge together with the resistors R1, R2, R3. The relay point A between the resistor R1 and thermistor 5 is connected to the inverting input terminal of the operational amplifier OP1, and the resistor R2 and the resistor
The relay point B of R3 is connected to the non-inverting input terminal of the operational amplifier OP1. And the resistance of thermistor 5
The change in R s is the potential difference between the potential V A at relay point A and the potential V B at relay point B in operational amplifier OP1.
The voltage difference V B -V A is detected as V B -V A, and the potential difference V B - V A is output from the operational amplifier OP1.
１０は、入力端子が演算増幅器OP１の出力端
子に接続されたサンプルホールド回路であり、サ
ンプルホールド回路１０は、タイミングパルスに
したがつて一定時間毎に、入力端子に印加されて
いる電圧VB−VAをサンプルして、次のサンプリ
ング時点まで、サンプルした電圧をその出力端子
に保持する。 Reference numeral 10 denotes a sample and hold circuit whose input terminal is connected to the output terminal of the operational amplifier OP1, and the sample and hold circuit 10 detects the voltage V B − applied to the input terminal at fixed time intervals according to the timing pulse. Samples V A and holds the sampled voltage at its output terminal until the next sampling point.
サンプルホールド回路１０の出力端子は、演算
増幅器OP２の反転入力端子に接続されるととも
に、演算増幅器OP２の非反転入力端子には、演
算増幅器OP１の出力端子が接続される。そして、
演算増幅器OP２では、電圧VB−VAとそのサンプ
ルリング電圧とが比較されて、電圧VB−VAの変
化率が検出される。 The output terminal of the sample hold circuit 10 is connected to the inverting input terminal of the operational amplifier OP2, and the output terminal of the operational amplifier OP1 is connected to the non-inverting input terminal of the operational amplifier OP2. and,
In the operational amplifier OP2, the voltage V B -V A and its sampling voltage are compared, and the rate of change of the voltage V B - V A is detected.
以上の回路構成において、金属管６が充填材３
に挿入されていない時、ホイーストンブリツジの
端子Ｃに所定電圧Vcが印加され、サーミスタ５
が自己発熱を開始しても、この熱はすべて空気中
に放熱される。その結果、サーミスタ５の温度が
変化しないので、その抵抗Rsは一定であり、第
６図に示すように、電圧VB−VAも一定である。 In the above circuit configuration, the metal tube 6 is the filler material 3
When the terminal C of the Wheatstone bridge is not inserted, a predetermined voltage V c is applied to the thermistor 5.
begins to self-heat, all of this heat is radiated into the air. As a result, since the temperature of the thermistor 5 does not change, its resistance R s remains constant, and as shown in FIG. 6, the voltage V B -V A also remains constant.
次に、金属管６がシーリング材３ａに一定速度
で垂直に挿入されると、シーリング材３ａの熱伝
導率は低いので、放熱量が少なく、サーミスタ５
の温度が自己発熱により上昇し、その抵抗Rsが
減少する。その結果、Ａ点の電位VAが低下して、
電圧VB−VAが増大する。 Next, when the metal tube 6 is vertically inserted into the sealing material 3a at a constant speed, since the thermal conductivity of the sealing material 3a is low, the amount of heat dissipated is small, and the thermistor 5
temperature rises due to self-heating, and its resistance R s decreases. As a result, the potential V A at point A decreases,
The voltage V B −V A increases.
更に、金属管６の先端が基材３ｂに達して、基
材３ｂ中に進入すると、その熱伝導率はシーリン
グ材３ａよりも高く、サーミスタ５の放熱量が多
くなるので、サーミスタ５の温度が低下する。そ
の結果、サーミスタ５の抵抗RSが増大して、電
位VAが上昇するので、電圧VB−VAが減少する。 Furthermore, when the tip of the metal tube 6 reaches the base material 3b and enters the base material 3b, its thermal conductivity is higher than that of the sealing material 3a, and the amount of heat dissipated from the thermistor 5 increases, so the temperature of the thermistor 5 increases. descend. As a result, the resistance R S of the thermistor 5 increases and the potential V A increases, so that the voltage V B - V A decreases.
したがつて、第６図に示すように、サーミスタ
５の抵抗に逆比例する電圧VB−VAの極点Ｐにお
ける金属管６の挿入長さが、シーリング材３ａの
厚みに等しい。 Therefore, as shown in FIG. 6, the insertion length of the metal tube 6 at the pole point P of the voltage V B -V A , which is inversely proportional to the resistance of the thermistor 5, is equal to the thickness of the sealing material 3a.
演算増幅器OP１の出力変化は、第７図に示す
ように、上述した電圧VB−VAの変化に等しい。
また、サンプルホールダ回路１０の出力は、タイ
ミングパルスが立上るまでは、演算増幅器OP１
の出力の前のサンプル電圧を保持し、タイミング
パルスが立上ると、その時点の演算増幅器OP１
の出力電圧がサンプルされて、その電圧が保持さ
れる。 The change in the output of operational amplifier OP1 is equal to the change in voltage V B -V A described above, as shown in FIG.
In addition, the output of the sample holder circuit 10 is supplied to the operational amplifier OP1 until the timing pulse rises.
Holds the sample voltage before the output of OP1, and when the timing pulse rises, the operational amplifier OP1 at that time
The output voltage of is sampled and held.
したがつて、演算増幅器OP１の出力電圧が上
昇する極点Ｐの前では、増幅器OP１の出力はサ
ンプルホールド回路１０の出力以上であり、増幅
器OP２の出力電圧が下降する極点Ｐの後では、
増幅器OP１の出力はサンプルホールド回路１０
の出力以下となる。 Therefore, before the pole point P where the output voltage of the operational amplifier OP1 increases, the output of the amplifier OP1 is equal to or higher than the output of the sample and hold circuit 10, and after the pole point P where the output voltage of the amplifier OP2 decreases,
The output of amplifier OP1 is sent to sample and hold circuit 10.
The output will be less than or equal to the output of
その結果、増幅器OP１の出力からサンプルホ
ールド回路１０の出力を減算する演算増幅器OP
２の出力は、極点Ｐの前では正となり、極点Ｐの
後では負となる。 As a result, the operational amplifier OP subtracts the output of the sample and hold circuit 10 from the output of the amplifier OP1.
The output of 2 is positive before the pole P and negative after the pole P.
したがつて、演算増幅器OP２の出力電圧が正
から負へ変化する時点に、金属管６を止めて、充
填材３に挿入した金属管６の長さを測定すれば、
その長さがシーリング材３ａの厚みに等しい。こ
のようにしてシーリング材３ａの厚みを計測する
ことができる。 Therefore, if the metal tube 6 is stopped and the length of the metal tube 6 inserted into the filling material 3 is measured at the point when the output voltage of the operational amplifier OP2 changes from positive to negative,
Its length is equal to the thickness of the sealing material 3a. In this way, the thickness of the sealing material 3a can be measured.
なお、本発明は、上述したような目地２に充填
されたシーリング材３ａの厚み計測だけでなく、
熱伝導率が異なる複数の材料を重ねて形成された
部材の各材料の厚みを計測するのに広く用いるこ
とができる。 Note that the present invention is not limited to measuring the thickness of the sealing material 3a filled in the joint 2 as described above.
It can be widely used to measure the thickness of each material in a member formed by stacking multiple materials with different thermal conductivities.
以上に詳述したように、本発明によれば、自己
加熱機能を備えた感熱素子を先端に有する計測棒
を、複数の材質を重ねて形成された部材に挿入
し、各材質の熱伝導度に依存する上記感熱素子の
温度変化率を検出して、各材質の厚みを計測する
ようにしたので、コンクリート等を破壊すること
なく、目地に充填された充填材のシーリング材の
厚みを正確かつ容易に計測できる厚み計測装置を
提供することができる。
As detailed above, according to the present invention, a measurement rod having a heat-sensitive element with a self-heating function at the tip is inserted into a member formed by stacking a plurality of materials, and the thermal conductivity of each material is measured. The thickness of each material is measured by detecting the temperature change rate of the heat-sensitive element, which depends on A thickness measuring device that can easily measure thickness can be provided.
第１図はコンクリートブロツクの接合部に設け
られた目地を示す断面図、第２図は本発明の一実
施例による計測棒を示す断面図、第３図は第２図
の側面図、第４図は断熱材の代わりに通風孔を設
けた金属管を示す側面図、第５図はこの発明の実
施例に用いられる電気回路を示す回路図、第６図
はサーミスタ５の温度に比例した電圧VB−VAの
変化を示す線図、第７図は演算増幅器OP１，OP
２およびサンプルホールド回路１０の出力を示す
線図である。
３ｂ……基材、３ａ……シーリング材、４……
探針、５……サーミスタ、OP１，OP２……演算
増幅器、１０……サンプルホールド回路。
FIG. 1 is a sectional view showing a joint provided at a joint of concrete blocks, FIG. 2 is a sectional view showing a measuring rod according to an embodiment of the present invention, FIG. 3 is a side view of FIG. 2, and FIG. The figure is a side view showing a metal tube provided with ventilation holes instead of a heat insulating material, FIG. 5 is a circuit diagram showing an electric circuit used in an embodiment of this invention, and FIG. 6 is a voltage proportional to the temperature of the thermistor 5. A diagram showing the change in V B −V A , Figure 7 shows operational amplifiers OP1 and OP.
2 is a diagram showing the outputs of the sample and hold circuit 10. 3b... Base material, 3a... Sealing material, 4...
Probe, 5... thermistor, OP1, OP2... operational amplifier, 10... sample hold circuit.
Claims (1)
ねて形成された部材の一方の厚みを計測する厚み
計測装置であつて、上記部材に挿入し得る計測針
と、この計測針の先端部に内設され定電圧を印加
することによつて一定量の発熱をさせることがで
き、かつ温度によつて電気抵抗が変化することか
ら、その電気抵抗を測ることによつて温度を検知
することができる感熱素子と、この感熱素子の電
気抵抗の変化を示す出力信号が急変したことを検
出する回路を備えたことを特徴とする厚み計測装
置。1 A thickness measuring device for measuring the thickness of one of a member formed by stacking at least two materials having different thermal conductivities, which includes a measuring needle that can be inserted into the member, and a measuring needle installed inside the tip of the measuring needle. A thermosensitive device that can generate a certain amount of heat by applying a constant voltage, and because the electrical resistance changes depending on the temperature, the temperature can be detected by measuring the electrical resistance. 1. A thickness measuring device comprising: an element; and a circuit for detecting a sudden change in an output signal indicating a change in electrical resistance of the heat-sensitive element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11391983A JPS604805A (en) | 1983-06-23 | 1983-06-23 | Thickness measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11391983A JPS604805A (en) | 1983-06-23 | 1983-06-23 | Thickness measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS604805A JPS604805A (en) | 1985-01-11 |
| JPH0230645B2 true JPH0230645B2 (en) | 1990-07-09 |
Family
ID=14624472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11391983A Granted JPS604805A (en) | 1983-06-23 | 1983-06-23 | Thickness measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS604805A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114544716A (en) * | 2020-11-24 | 2022-05-27 | 娄底市安地亚斯电子陶瓷有限公司 | A kind of urban pipeline sludge detection equipment, detection method and manufacturing method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5517315A (en) * | 1978-07-24 | 1980-02-06 | Masayuki Ishikawa | Novel 1-phthalazone derivative |
| JPS574501A (en) * | 1980-06-12 | 1982-01-11 | Jeol Ltd | Monitoring device |
| JPS5724842A (en) * | 1980-07-22 | 1982-02-09 | Toa Medical Electronics Co Ltd | Particle analyzing device |
-
1983
- 1983-06-23 JP JP11391983A patent/JPS604805A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS604805A (en) | 1985-01-11 |
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