JPH023155Y2 - - Google Patents
Info
- Publication number
- JPH023155Y2 JPH023155Y2 JP10766481U JP10766481U JPH023155Y2 JP H023155 Y2 JPH023155 Y2 JP H023155Y2 JP 10766481 U JP10766481 U JP 10766481U JP 10766481 U JP10766481 U JP 10766481U JP H023155 Y2 JPH023155 Y2 JP H023155Y2
- Authority
- JP
- Japan
- Prior art keywords
- strain gauge
- branch
- frost
- support frame
- sensor
- 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
- 238000005452 bending Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910002482 Cu–Ni Inorganic materials 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
Landscapes
- Defrosting Systems (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Description
【考案の詳細な説明】
本案はストレンゲージを使用した霜センサーに
関するものである。[Detailed description of the invention] This invention relates to a frost sensor using a strain gauge.
周知される様に、冷却、冷凍装置等においては
霜の発生を早期に検出する事が要望されている
が、従来の此種センサーは構造が複雑で価格も高
いものであつた。 As is well known, there is a demand for early detection of frost formation in cooling and freezing equipment, but conventional sensors of this type have a complex structure and are expensive.
本案はこの様な装置に用いて便利な霜センサー
を安価に提供せんとするものである。 The present invention aims to provide a convenient frost sensor for use in such devices at a low cost.
以下に本案霜センサーを添付図面につき説明す
ると、第１図は本案センサーの１実施例を示すも
ので、この図において、１はストレンゲージ、２
は支片、３は柔軟な断熱材で作られた断熱クツシ
ヨン層、４は支枠である。 The frost sensor of the present invention will be explained below with reference to the accompanying drawings. Fig. 1 shows one embodiment of the sensor of the present invention. In this figure, 1 is a strain gauge, 2
3 is a heat insulating cushion layer made of a flexible heat insulating material, and 4 is a support frame.
上記ストレンゲージ１は、変歪によつて抵抗値
が変化する変歪型可変抵抗体（以下抵抗体と称
す）例へばCu−NiやNi−Crの線材や箔材を電気
絶縁性のフイルム状基材に重着して作られたもの
で基材が屈曲して抵抗体が引張られた時には端子
間抵抗値が増大し、又基材が屈曲して抵抗体が圧
縮された時には端子間抵抗値が減小する特性を有
している。 The above-mentioned strain gauge 1 is a variable strain type variable resistor (hereinafter referred to as a resistor) whose resistance value changes depending on strain. For example, the strain gauge 1 is made of an electrically insulating film-like material made of Cu-Ni or Ni-Cr wire or foil material. When the base material is bent and the resistor is pulled, the resistance between the terminals increases, and when the base material is bent and the resistor is compressed, the resistance between the terminals increases. It has the characteristic of decreasing.
上記支片２は屈曲性の良い材料、更に望ましく
は銅やアルミニウム等の熱伝導性の良い材料で作
られており、霜柱の成育による圧力で屈曲する様
薄く作られると共に片面にはストレンゲージ１を
密着保持している。 The above-mentioned support piece 2 is made of a material with good flexibility, preferably a material with good thermal conductivity such as copper or aluminum. is held closely.
上記断熱クツシヨン層３は、所望により設けら
れるもので、上記支片２の片面、例へば上面に重
層されており、これによつて支片２の片面に霜が
発生するのを防止している。 The heat insulating cushion layer 3 is provided as desired, and is layered on one side, for example, the top surface, of the branch piece 2, thereby preventing frost from forming on one side of the branch piece 2.
上記支枠４は、上記支片２の１端を支承すると
共に、被検知部例へば冷却パイプ５に固定する様
構成されており、実施例では、熱伝導性の良い材
料、例へば銅で箱型に作られている。 The support frame 4 is configured to support one end of the support piece 2 and to be fixed to the cooling pipe 5 to the detected part. It is made in
この実施例では、上記断熱クツシヨン層３は上
記支枠４の上面内壁と支片２の上面との間に密に
形成されており、この断熱クツシヨン層３により
この部分における霜の発生が防止されると共に、
外部震動によつて支片２が屈曲する事も防止され
ている。 In this embodiment, the heat insulating cushion layer 3 is densely formed between the upper inner wall of the support frame 4 and the upper surface of the support piece 2, and the heat insulating cushion layer 3 prevents frost from forming in this area. Along with
The support piece 2 is also prevented from being bent due to external vibrations.
上記ストレンゲージ１には、上記支片２の長手
方向即ち屈曲方向に沿つた両端に夫々端子１１，
１２が設けてあり、此等端子１１，１２は検知回
路６に接続されている。 The strain gauge 1 includes terminals 11 at both ends of the branch piece 2 along the longitudinal direction, that is, the bending direction.
12 are provided, and these terminals 11 and 12 are connected to the detection circuit 6.
上記検知回路６は、上記ストレンゲージ１の抵
抗変化を検出して動作する様構成されており、例
へば、第３図に示す如く、ストレンゲージ１を抵
抗成分として１辺に挿入したブリツジ回路６１
と、このブリツジ回路６１の出力を増幅する増幅
器６２及びこの増幅器６２の出力側に接続された
作動回路６３、例へば冷却パイプ系中にあるバル
ブを駆動する回路や、冷却回路を停止せしめる制
御回路等で構成されている。 The detection circuit 6 is configured to operate by detecting a change in the resistance of the strain gauge 1. For example, as shown in FIG. 3, a bridge circuit 61 in which the strain gauge 1 is inserted as a resistance component on one side.
An amplifier 62 that amplifies the output of this bridge circuit 61 and an operating circuit 63 connected to the output side of this amplifier 62, such as a circuit that drives a valve in a cooling pipe system, a control circuit that stops the cooling circuit, etc. It is made up of.
この場合には、上記ブリツジ回路６１を、上記
ストレンゲージ１の通常時における抵抗値で平衡
ならしめる様設定しておく事が普通であるが、特
殊な場合にはストレンゲージ１の抵抗値で不平衡
電圧を発生せしめておいても良い。 In this case, it is normal to set the bridge circuit 61 so as to balance it with the resistance value of the strain gauge 1 under normal conditions, but in special cases, the resistance value of the strain gauge 1 may be used to balance it. A balanced voltage may be generated.
上記実施例では、１本の支片２が屈曲する事
で、この支片２に密着せしめられているストレン
ゲージ１が変歪する様構成しているが、本案セン
サーは第２図に示す如く、２本の支片２，２′を
その自由端２１，２１′が相互に対向する様固定
して此等１対の支片２，２′の自由端間にストレ
ンゲージ１を跨着しても良く、かくすれば、１対
の支片２，２′が図中下方より成育する霜柱Ｆに
押上げられた時、ストレンゲージ１が鎖線で示す
如く支片２，２′の屈曲動作を相乗的に受ける事
になるから、ストレンゲージ１の抵抗値変化を大
きくする事が出来ると云う利益がある。 In the above embodiment, the strain gauge 1 that is closely attached to the branch piece 2 is deformed by bending one of the branch pieces 2, but the sensor of the present invention is as shown in FIG. , the two branches 2, 2' are fixed so that their free ends 21, 21' face each other, and the strain gauge 1 is straddled between the free ends of the pair of branches 2, 2'. In this way, when the pair of branches 2, 2' are pushed up by the frost column F growing from below in the figure, the strain gauge 1 will bend the branches 2, 2' as shown by the chain lines. This has the advantage that the resistance value change of the strain gauge 1 can be increased.
本案センサーはこの様に安価に入手出来るスト
レンゲージ１を霜柱Ｒの成育によつて動作せしめ
る様構成したものであるから、低廉な製造販売が
可能であると共に、ストレンゲージ１は形状が小
さいため、センサー全体を小型化出来ると云う利
益もある。 Since the sensor of the present invention is constructed so that the strain gauge 1, which can be obtained at low cost, is operated by the growth of the frost column R, it can be manufactured and sold at low cost, and since the strain gauge 1 is small in shape, There is also the benefit of being able to downsize the entire sensor.
第１図、第２図は夫々本案センサーの縦断側面
図、第３図は本案センサーを使用した検出回路図
である。
図中１はストレンゲージ、２，２′は支片、３
は断熱クツシヨン層、４は支枠、５は被検知部と
しての冷却パイプを示す。
1 and 2 are longitudinal sectional side views of the sensor of the present invention, and FIG. 3 is a detection circuit diagram using the sensor of the present invention. In the figure, 1 is a strain gauge, 2 and 2' are branch pieces, and 3
Reference numeral 4 indicates a heat insulating cushion layer, 4 a support frame, and 5 a cooling pipe as a detected portion.
Claims (1)
端を固定して他端を自由端とした屈曲可能な支
片とこの支片に取付けられて支片の屈曲動作に
より伸長、圧縮せしめられるストレンゲージと
を備え、上記支枠内に成育する霜柱によつて上
記支片が屈曲せしめられこれによつてストレン
ゲージの端子間抵抗値が変化する様に構成した
霜センサー。 ２ 上記支枠に１対の支片がその自由端を相互に
対向する様にして固設され、上記ストレンゲー
ジが上記支片の自由端間に跨着されている実用
新案登録請求の範囲第１項記載の霜センサー。[Scope of claim for utility model registration] 1. A support frame attached to the detected part, and 1.
A frost pillar that grows within the support frame, comprising a bendable branch with one end fixed and the other end free, and a strain gauge attached to this branch that is expanded and compressed by the bending action of the branch. The frost sensor is configured such that the branch piece is bent by the bending motion, thereby changing the resistance value between the terminals of the strain gauge. 2. Utility model registration claim No. 1, wherein a pair of support pieces are fixed to the support frame with their free ends facing each other, and the strain gauge is straddled between the free ends of the support pieces. The frost sensor described in item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10766481U JPS5814142U (en) | 1981-07-20 | 1981-07-20 | frost sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10766481U JPS5814142U (en) | 1981-07-20 | 1981-07-20 | frost sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5814142U JPS5814142U (en) | 1983-01-28 |
| JPH023155Y2 true JPH023155Y2 (en) | 1990-01-25 |
Family
ID=29902092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10766481U Granted JPS5814142U (en) | 1981-07-20 | 1981-07-20 | frost sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5814142U (en) |
-
1981
- 1981-07-20 JP JP10766481U patent/JPS5814142U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5814142U (en) | 1983-01-28 |
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