JPS5978925U - Heat wire deposit burnout device for hot wire flowmeter - Google Patents
Heat wire deposit burnout device for hot wire flowmeterInfo
- Publication number
- JPS5978925U JPS5978925U JP17353082U JP17353082U JPS5978925U JP S5978925 U JPS5978925 U JP S5978925U JP 17353082 U JP17353082 U JP 17353082U JP 17353082 U JP17353082 U JP 17353082U JP S5978925 U JPS5978925 U JP S5978925U
- Authority
- JP
- Japan
- Prior art keywords
- hot wire
- burnout
- flowmeter
- wire
- circuit
- 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
Landscapes
- Measuring Volume Flow (AREA)
- Details Of Flowmeters (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は熱線付着物焼切り装置を備えた熱線流量計の従
来例を示す回路図、第２図は同上装置に使用される熱線
の取付部を示す斜視図、第３図は同上装置の各部に生じ
る信号の波形を示すタイムチャート、第４図は本考案の
一実施例を示す回路図、第５図は第４図の各部に生じる
信号の波形を示すタイムチャートである。
ＲＨ・・・熱線、Ｒｋ、 Ｒ２，Ｒ３・・・ブリッヂ回
路の抵抗、Ｒ４・・・焼切り回路の抵抗、Ｒ５，Ｒ６・
・・積分回路の抵抗、Ｃ・・・積分回路のコシデンサ、
Ｔｒ□、 Ｔｒ２・・・ト −ランジスタ、Ｏｐ
・・・差動増幅器。Fig. 1 is a circuit diagram showing a conventional example of a hot wire flowmeter equipped with a device for burning off hot wire deposits, Fig. 2 is a perspective view showing the mounting part of the hot wire used in the above device, and Fig. 3 is a diagram of the same as the above device. FIG. 4 is a circuit diagram showing an embodiment of the present invention, and FIG. 5 is a time chart showing the waveforms of signals generated in each portion of FIG. 4. RH... Hot wire, Rk, R2, R3... Resistance of bridge circuit, R4... Resistance of burnout circuit, R5, R6.
...Resistance of the integrating circuit, C...Cocidenser of the integrating circuit,
Tr□, Tr2... transistor, Op
...Differential amplifier.
Claims (1)
より、熱線に大電流を供給して熱線への付着物を定時的
に焼切るようにした熱線流量計の熱線付着物焼切り装置
において、焼切り信号発生回路と焼切り回路の信号入力
端子との間に抵抗とコンデンサからなる積分回路を接続
して構成し、焼切り信号出力時に熱線に流れる電流の立
ち上り及び立ち下りを緩やかに変化する特性に制御する
ようにしたことを特徴とする熱線流量計の熱線付着物焼
切り装置。A hot wire deposit burnout device for a hot wire flowmeter that supplies a large current to the hot wire in response to a signal output from the burnout signal generation circuit to the burnout circuit to periodically burn off the deposits on the hot wire. An integral circuit consisting of a resistor and a capacitor is connected between the burnout signal generation circuit and the signal input terminal of the burnout circuit, and the rise and fall of the current flowing through the hot wire are changed gradually when the burnout signal is output. A device for burning off hot wire deposits in a hot wire flowmeter, which is characterized by controlling the characteristics of the hot wire flowmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17353082U JPS5978925U (en) | 1982-11-18 | 1982-11-18 | Heat wire deposit burnout device for hot wire flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17353082U JPS5978925U (en) | 1982-11-18 | 1982-11-18 | Heat wire deposit burnout device for hot wire flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5978925U true JPS5978925U (en) | 1984-05-28 |
Family
ID=30378003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17353082U Pending JPS5978925U (en) | 1982-11-18 | 1982-11-18 | Heat wire deposit burnout device for hot wire flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5978925U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5594114A (en) * | 1979-01-10 | 1980-07-17 | Bosch Gmbh Robert | Temperature controller for measuring resistor of internal combustion engine |
-
1982
- 1982-11-18 JP JP17353082U patent/JPS5978925U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5594114A (en) * | 1979-01-10 | 1980-07-17 | Bosch Gmbh Robert | Temperature controller for measuring resistor of internal combustion engine |
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