Clamp-on type ultrasonic flow sensor
First Claim
1. A clamp-on type ultrasonic flow sensor that measures a flow rate of fluid flowing in a pipe, the clamp-on type ultrasonic flow sensor comprising:
- a driving circuit generating a first driving signal and a second driving signal;
an intermediate housing which houses the driving circuit;
a first cable connected to the intermediate housing;
a second cable connected to the intermediate housing;
a first ultrasonic element, electrically coupled to the driving circuit via the first cable, transmitting an ultrasonic wave in response to the first driving signal and receiving an ultrasonic wave;
a head housing connected to the first cable and coupled to the intermediate housing via the first cable, which houses the first ultrasonic element;
a second ultrasonic element, electrically coupled to the driving circuit, transmitting an ultrasonic wave in response to the second driving signal and receiving an ultrasonic wave;
a signal processing section disposed in the intermediate housing, configured to perform predetermined signal processing on ultrasonic signals output from the first and second ultrasonic elements;
a switching circuit disposed in the intermediate housing, which switches a first state in which the second ultrasonic element and the signal processing section are connected and a second state in which the first ultrasonic element and the signal processing section are connected;
an information generating section disposed in the intermediate housing, configured to generate, as measurement information, information concerning a flow rate of the fluid in the pipe on the basis of the ultrasonic signals after the signal processing by the signal processing section;
a flow-rate calculating section configured to calculate a flow rate value on the basis of the measurement information generated by the information generating section;
a condition setting section for setting an output condition of a flow rate value that should be output to an outside of the clamp-on type ultrasonic flow sensor;
a main body housing connected to the second cable, which houses the condition setting section; and
an output section disposed in the main body, configured to output the flow rate value calculated by the flow-rate calculating section to the outside of the clamp-on type ultrasonic flow sensor according to the output condition;
wherein the first cable connected between the head housing and the intermediate housing and configured to transmit the first driving signal and the ultrasonic signal output from the first ultrasonic element, andwherein the second cable connected between the intermediate housing and the main body housing and configured to transmit one of the measurement information generated by the information generating section and the flow rate value calculated by the flow-rate calculating section.
1 Assignment
0 Petitions
Accused Products
Abstract
To provide a clamp-on type ultrasonic flow sensor capable of highly accurately measuring a flow rate. First and second head cables CA1 and CA2 are connected between a head section 10 and an intermediate section 20. A relay cable CA3 is connected between the intermediate section 20 and a main body section 30. Ultrasonic elements are housed in casings 11c and 12c of the head section 10. A driving circuit for driving the ultrasonic elements and a signal processing section configured to perform signal processing on ultrasonic signals output from the ultrasonic elements are housed in a casing 20c of the intermediate section 20. In the intermediate section 20, a switching circuit configured to switch a connection state of the two ultrasonic elements of the head section 10 and the signal processing section is provided.
-
Citations
12 Claims
-
1. A clamp-on type ultrasonic flow sensor that measures a flow rate of fluid flowing in a pipe, the clamp-on type ultrasonic flow sensor comprising:
-
a driving circuit generating a first driving signal and a second driving signal; an intermediate housing which houses the driving circuit; a first cable connected to the intermediate housing; a second cable connected to the intermediate housing; a first ultrasonic element, electrically coupled to the driving circuit via the first cable, transmitting an ultrasonic wave in response to the first driving signal and receiving an ultrasonic wave; a head housing connected to the first cable and coupled to the intermediate housing via the first cable, which houses the first ultrasonic element; a second ultrasonic element, electrically coupled to the driving circuit, transmitting an ultrasonic wave in response to the second driving signal and receiving an ultrasonic wave; a signal processing section disposed in the intermediate housing, configured to perform predetermined signal processing on ultrasonic signals output from the first and second ultrasonic elements; a switching circuit disposed in the intermediate housing, which switches a first state in which the second ultrasonic element and the signal processing section are connected and a second state in which the first ultrasonic element and the signal processing section are connected; an information generating section disposed in the intermediate housing, configured to generate, as measurement information, information concerning a flow rate of the fluid in the pipe on the basis of the ultrasonic signals after the signal processing by the signal processing section; a flow-rate calculating section configured to calculate a flow rate value on the basis of the measurement information generated by the information generating section; a condition setting section for setting an output condition of a flow rate value that should be output to an outside of the clamp-on type ultrasonic flow sensor; a main body housing connected to the second cable, which houses the condition setting section; and an output section disposed in the main body, configured to output the flow rate value calculated by the flow-rate calculating section to the outside of the clamp-on type ultrasonic flow sensor according to the output condition; wherein the first cable connected between the head housing and the intermediate housing and configured to transmit the first driving signal and the ultrasonic signal output from the first ultrasonic element, and wherein the second cable connected between the intermediate housing and the main body housing and configured to transmit one of the measurement information generated by the information generating section and the flow rate value calculated by the flow-rate calculating section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
Specification