JPS5837570U - flow meter flow direction detector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

Figure 1 is a diagram showing the relationship between the fluid pipe and transducer in an ultrasonic flowmeter, Figure 2 is a time chart showing the relationship between flow rate and detected flow direction, and Figure 3 is a flow direction detector with hysteresis. Fig. 4 is a diagram showing changes in flow direction to explain the drawbacks of the conventional technology, Fig. 5 is a block diagram showing an example of the flow direction detector according to this invention, and Fig. 6 is a diagram showing other flow direction detectors. FIG. 7 is a block diagram showing an example of the invention, and FIG. 7 is a diagram showing a partial modification of this invention. 11: Flow rate signal input terminal, 12: Binary signal converter, 13
: Shift register, 14: Clock input terminal, 15: Majority logic circuit, 17: Latch circuit, 18: Output terminal, 2
1 near down counter.

Claims (1)

[Scope of utility model registration request] In a flowmeter that generates a flow rate signal that is larger or smaller than a reference value depending on the flow direction of the fluid to be measured, the flow rate signal has a binary value that takes one of two values depending on the instantaneous flow direction of the fluid to be measured. means for generating a signal; and means for outputting a flow direction signal according to the magnitude of one number and the other number of the two ridges within a period in which the binary signals are periodically and sequentially captured. Flowmeter flow direction detector equipped with.