Ultrasonic flowmeter capable of applying both pulse doppler method and transit time method, method and program for automatically selecting measurement method in flowmeter, and electronic device for flowmeter

A method of selecting a measuring method by selecting one of two measuring methods for use in an ultrasonic flowmeter capable of applying both a pulse Doppler method for a flow rate measurement and a transit time method for a flow rate measurement, comprising:

• a determining step of determining a current measuring method;
• a determining step of determining reliability of a reception wave;
• and
• a selecting step of selecting a measuring method different from the current measuring method when it is determined that the reliability of the reception wave is insufficient, and when it is determined that the reliability of the reception wave is sufficient, obtaining a value as an index of reliability of a reception wave in each of the pulse Doppler method and the transit time method, comparing the values as the indexes of the two measuring methods, and selecting a measuring method having a larger value as the index.

An ultrasonic flowmeter capable of applying both a pulse Doppler method for a flow rate measurement and a transit time method for a flow rate measurement, comprising:

• a determination unit determining a current measuring method;
• a determination unit determining reliability of a reception wave;
• and
• a selection unit selecting a measuring method different from the current measuring method when it is determined that the reliability of the reception wave is insufficient.

An ultrasonic flowmeter capable of applying both a pulse Doppler method for a flow rate measurement and a transit time method for a flow rate measurement, comprising:

• a determination unit determining a current measuring method;
• a determination unit determining reliability of a reception wave;
• and
• a selection unit selecting a measuring method different from the current measuring method when it is determined that the reliability of the reception wave is insufficient, and when it is determined that the reliability of the reception wave is sufficient, obtaining a value as an index of reliability of a reception wave in each of the pulse Doppler method and the transit time method, comparing the values as the indexes of the two measuring methods, and selecting a measuring method having a larger value as the index.

A computer-readable recording medium storing a program used to direct a computer of an ultrasonic flowmeter capable of applying both a pulse Doppler method for a flow rate measurement and a transit time method for a flow rate measurement to realize:

• a function of determining a current measuring method;
• a function of determining reliability of a reception wave;
• and
• a selecting function of selecting a measuring method different from the current measuring method when it is determined that the reliability of the reception wave is insufficient.

A computer-readable recording medium storing a program used to direct a computer of an ultrasonic flowmeter capable of applying both a pulse Doppler method for a flow rate measurement and a transit time method for a flow rate measurement to realize:

• a function of determining a current measuring method;
• a function of determining reliability of a reception wave;
• and
• a function of selecting a measuring method different from the current measuring method when it is determined that the reliability of the reception wave is insufficient, and when it is determined that the reliability of the reception wave is sufficient, obtaining a value as an index of reliability of a reception wave in each of the pulse Doppler method and the transit time method, comparing the values as the indexes of the two measuring methods, and selecting a measuring method having a larger value as the index.

A program used to direct a computer of an ultrasonic flowmeter capable of applying both a pulse Doppler method for a flow rate measurement and a transit time method for a flow rate measurement to realize:

• a function of determining a current measuring method;
• a function of determining reliability of a reception wave;
• and
• a selecting function of selecting a measuring method different from the current measuring method when it is determined that the reliability of the reception wave is insufficient.

A program used to direct a computer of an ultrasonic flowmeter capable of applying both a pulse Doppler method for a flow rate measurement and a transit time method for a flow rate measurement to realize:

• a function of determining a current measuring method;
• a function of determining reliability of a reception wave;
• and
• a function of selecting a measuring method different from the current measuring method when it is determined that the reliability of the reception wave is insufficient, and when it is determined that the reliability of the reception wave is sufficient, obtaining a value as an index of reliability of a reception wave in each of the pulse Doppler method and the transit time method, comparing the values as the indexes of the two measuring methods, and selecting a measuring method having a larger value as the index.

An electronic device for use with an ultrasonic flowmeter capable of applying both a pulse Doppler method for a flow rate measurement and a transit time method for a flow rate measurement, comprising:

• a determination unit determining a current measuring method;
• a determination unit determining reliability of a reception wave;
• and
• a selection unit selecting a measuring method different from the current measuring method when it is determined that the reliability of the reception wave is insufficient.