BUCKET TYPE FLOW METER AND FLOW RATE MEASURING METHOD

• Main Authors: KAGIFUKU TATSUO, KOYAMA ISAO, TSURUTA AKIRA
• Format: Patent
• Language: English; Japanese
• Published: 03.12.2020
• Subjects: MEASURING; MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL; METEOROLOGY; METERING BY VOLUME; PHYSICS; TESTING

To enable improvement in measurement accuracy of a flow rate in a specific flow rate region of a liquid.SOLUTION: A bucket type flow meter has: a bucket 11 in which basin portions 18, 19 are formed at both sides of a fulcrum, provided so as to be overturnable by their being rotated around the fulcrum, and drain water by their being overturned after water flows into the basin positions from an inflow portion 17; a regulation unit 12 that regulates an overturn stop position of the bucket; a detection unit 13 that detects overturn of the bucket; an integration counter 14 that counts the number of times that the bucket overturns; and a flow rate calculation circuit 15 that, based on a correlation function of a flow rate and the number of times that the bucket overturns, calculates a flow rate of water from the number of times that the bucket overturns, the correlation function determining a relation between a flow rate of water and the number of times that the bucket overturns, which is calculated using a correlation function of a flow rate and a quantity of water drained per overturn, the correlation function determining a relation between a flow rate of water flowing in from the inflow portion and a quantity of water drained per overturn of the bucket. The length of each of ferrule portions 25, 26 for regulating the overturn stop position is adjusted so as to decrease a change in a quantity of water drained per overturn of the bucket with respect to a change of a flow rate in a specific flow rate region of water.SELECTED DRAWING: Figure 1 【課題】液体の特定流量域における流量の測定精度を向上できること。【解決手段】枡部１８、１９が支点の両側に形成されると共に支点回りに回動して転倒可能に設けられ、枡部に流入部１７から水が流入した後転倒して排水するバケット１１と、バケットの転倒停止位置を規制する規制ユニット１２と、バケットの転倒を検出する検出ユニット１３と、バケットの転倒回数をカウントする積算カウンタ１４と、流入部から流入する水の流量とバケットの１転倒当たりの排水量との関係を定めた流量・１転倒排水量相関関数を用いて算出された、水の流量とバケットの転倒回数との関係を定める流量・転倒回数相関関数に基づき、バケットの転倒回数から水の流量を算出する流量算出回路１５と、を有し、転倒停止位置を規定する石突部２５、２６の長さは、水の特定流量域における流量の変化に対するバケットの１転倒当たりの排水量の変化が小さくなるように調整されたものである。【選択図】図１