JPH03119723U - - Google Patents
Info
- Publication number
- JPH03119723U JPH03119723U JP2901190U JP2901190U JPH03119723U JP H03119723 U JPH03119723 U JP H03119723U JP 2901190 U JP2901190 U JP 2901190U JP 2901190 U JP2901190 U JP 2901190U JP H03119723 U JPH03119723 U JP H03119723U
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- zero
- condition
- hot
- hot wire
- 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
- 238000001514 detection method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Measuring Volume Flow (AREA)
Description
第１図は本考案の構成を示すブロツク図、第２
図は本考案の一実施例の構成を示す回路図、第３
図は同上実施例による流量検出ルーチンを示すフ
ローチヤート、第４図はワイヤタイプの熱線式流
量計の出力特性を示す線図、第５図はフイルムタ
イプの熱線式流量計の出力特性を示す線図、第６
図はワイヤタイプの熱線式流量計を使用した従来
例の回路図である。
１…熱線式流量計、２…ＡＤ変換器、３…マイ
クロコンピユータ。
Figure 1 is a block diagram showing the configuration of the present invention;
The figure is a circuit diagram showing the configuration of one embodiment of the present invention.
The figure is a flowchart showing the flow rate detection routine according to the above embodiment, Figure 4 is a line diagram showing the output characteristics of a wire type hot wire flowmeter, and Figure 5 is a line diagram showing the output characteristics of a film type hot wire flowmeter. Figure, 6th
The figure is a circuit diagram of a conventional example using a wire type hot wire flowmeter. 1... Hot wire flowmeter, 2... AD converter, 3... Microcomputer.
Claims (1)
類の熱線式流量計に対応して信号処理する装置で
あつて、流量が零である条件を検出する流量零条
件検出手段と、流量零の条件の検出時に熱線式流
量計の出力電圧を検出する流量零電圧検出手段と
、流量零条件検出時の熱線式流量計の出力電圧を
基準値と比較して熱線式流量計の種類を判別する
判別手段と、判別された熱線式流量計の種類に応
じて出力電圧に応じた流量を演算する流量演算手
段とを備えて構成したことを特徴とする熱線式流
量計の信号処理装置。 This is a signal processing device compatible with two types of hot wire flowmeters that have different output voltages when the flow rate is zero, and includes a zero flow condition detection means for detecting a condition where the flow rate is zero, and a zero flow rate condition detection means for detecting a condition where the flow rate is zero. A flow rate zero voltage detection means detects the output voltage of the hot wire flowmeter when a condition is detected, and the output voltage of the hot wire flowmeter when a zero flow rate condition is detected is compared with a reference value to determine the type of hot wire flowmeter. 1. A signal processing device for a hot-wire flowmeter, comprising: a determining means; and a flow rate calculation means for calculating a flow rate according to an output voltage according to the determined type of hot-wire flowmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990029011U JP2505265Y2 (en) | 1990-03-23 | 1990-03-23 | Signal processor for hot wire flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990029011U JP2505265Y2 (en) | 1990-03-23 | 1990-03-23 | Signal processor for hot wire flow meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03119723U true JPH03119723U (en) | 1991-12-10 |
| JP2505265Y2 JP2505265Y2 (en) | 1996-07-24 |
Family
ID=31531793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990029011U Expired - Lifetime JP2505265Y2 (en) | 1990-03-23 | 1990-03-23 | Signal processor for hot wire flow meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2505265Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0241117U (en) * | 1988-09-12 | 1990-03-22 |
-
1990
- 1990-03-23 JP JP1990029011U patent/JP2505265Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0241117U (en) * | 1988-09-12 | 1990-03-22 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2505265Y2 (en) | 1996-07-24 |
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