JPH02120024U - - Google Patents
Info
- Publication number
- JPH02120024U JPH02120024U JP2933889U JP2933889U JPH02120024U JP H02120024 U JPH02120024 U JP H02120024U JP 2933889 U JP2933889 U JP 2933889U JP 2933889 U JP2933889 U JP 2933889U JP H02120024 U JPH02120024 U JP H02120024U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- terminals
- vortex
- signal
- flow rate
- 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
- 238000006243 chemical reaction Methods 0.000 claims 3
- 230000005540 biological transmission Effects 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 238000005259 measurement Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Measuring Volume Flow (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Description
第１図は、本考案の渦流量計回路の原理を示す
ブロツク図である。
１……渦センサ、２……アンプ、３……フイル
タ回路、４……シユミツト回路、５……演算回路
、６……出力回路、７……ダイオードブリツヂ、
８……切替スイツチ、９……電源、１１……負荷
抵抗、Ｄ３，Ｄ４……発光ダイオード、Ｐ３，Ｐ
４……光感応スイツチ。
FIG. 1 is a block diagram showing the principle of the vortex flow meter circuit of the present invention. 1... Vortex sensor, 2... Amplifier, 3... Filter circuit, 4... Schmitt circuit, 5... Arithmetic circuit, 6... Output circuit, 7... Diode bridge,
8...Selector switch, 9...Power supply, 11...Load resistance, D3 , D4 ...Light emitting diode, P3 , P
4 ...Light sensitive switch.
Claims (1)
流量範囲の帯域で可変増幅する増幅回路と、渦信
号周波数のローパスフイルタ回路と、渦信号をパ
ルス信号に変換するパルス変換回路と、パルス信
号を流量信号に変換する変換回路と、該流量信号
を２線伝送する第１、第２端子を有する出力回路
とからなる変換器および前記第１、第２端子に接
続する第３、第４端子と、該第３、第４端子に直
列接続する直流電源と負荷抵抗とからなる受信器
とで構成する渦流量計回路において、受信器側は
、直流電源と負荷抵抗との直列回路を第３、第４
端子の極性が反転するごとく替換え、変換器側は
、第１、第２端子の極性の何如にかかわらず出力
回路に順方向の電源を供給するダイオードブリツ
ジを設け、且つ受信器側の何れかの切替えで導通
するダイオードを発光ダイオードとし、該発光ダ
イオードの発光に応じて作動するスイツチにより
前記増幅回路のゲイン、およびフイルタ回路にお
けるフイルタ定数を切替え、切替えにより液体と
気体流量計測に対応する特性をもつ変換器とする
ことを特徴とする渦流量計回路。 An amplifier circuit that variably amplifies the approximate sinusoidal vortex signal output from the vortex sensor in the flow rate range, a low-pass filter circuit for the vortex signal frequency, a pulse conversion circuit that converts the vortex signal into a pulse signal, and a pulse conversion circuit that converts the vortex signal into a pulse signal. A converter comprising a conversion circuit for converting into a flow rate signal, an output circuit having first and second terminals for two-wire transmission of the flow rate signal, and third and fourth terminals connected to the first and second terminals. , in a vortex flow meter circuit comprising a receiver consisting of a DC power supply and a load resistor connected in series to the third and fourth terminals, the receiver side connects the series circuit of the DC power supply and the load resistor to the third terminal, Fourth
The polarity of the terminals is reversed, and the converter side is provided with a diode bridge that supplies forward power to the output circuit regardless of the polarity of the first and second terminals, and either of the receiver side The diode that becomes conductive when switched is a light emitting diode, and the gain of the amplifier circuit and the filter constant in the filter circuit are switched by a switch that operates in response to the light emission of the light emitting diode, and the switching has characteristics that correspond to liquid and gas flow rate measurement. A vortex flow meter circuit characterized in that it is a converter having a transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2933889U JPH0626813Y2 (en) | 1989-03-15 | 1989-03-15 | Vortex flowmeter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2933889U JPH0626813Y2 (en) | 1989-03-15 | 1989-03-15 | Vortex flowmeter circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02120024U true JPH02120024U (en) | 1990-09-27 |
| JPH0626813Y2 JPH0626813Y2 (en) | 1994-07-20 |
Family
ID=31253467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2933889U Expired - Lifetime JPH0626813Y2 (en) | 1989-03-15 | 1989-03-15 | Vortex flowmeter circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0626813Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109269579A (en) * | 2018-11-20 | 2019-01-25 | 中环天仪股份有限公司 | A kind of essential safety turbine signal deteching circuit and implementation method |
-
1989
- 1989-03-15 JP JP2933889U patent/JPH0626813Y2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109269579A (en) * | 2018-11-20 | 2019-01-25 | 中环天仪股份有限公司 | A kind of essential safety turbine signal deteching circuit and implementation method |
| CN109269579B (en) * | 2018-11-20 | 2024-04-16 | 中环天仪股份有限公司 | Intrinsic safety turbine signal detection circuit and implementation method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0626813Y2 (en) | 1994-07-20 |
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