Ultrasonic transducer and ultrasonic flow-meter
An ultrasonic wave transmitting and receiving unit includes: a piezoelectric member supporting plate; an acoustic matching member fixed to one surface of the piezoelectric member supporting plate; a piezoelectric member fixed to the other surface. Moreover, the ultrasonic wave transmitting and receiving unit includes: an insulating vibration suppressing member integrally formed in such a manner as to cover the piezoelectric member and the piezoelectric member supporting plate, wherein the insulating vibration suppressing member has a hole reaching the piezoelectric member supporting plate.
1. An ultrasonic wave transmitting and receiving unit comprising:
a piezoelectric member supporting plate;
an acoustic matching member fixed to one surface of the piezoelectric member supporting plate;
a piezoelectric member fixed to another surface; and
an insulating vibration suppressing member integrally formed in such a manner as to cover the piezoelectric member and the piezoelectric member supporting plate, the insulating vibration suppressing member having a hole reaching the piezoelectric member supporting plate.
2. An ultrasonic wave transmitting and receiving unit comprising:
a topped cylindrical metal case having a top, a side wall, and a supporter extending outward from the side wall;
a piezoelectric member contained at an inner surface of the top of the topped cylindrical metal case;
an acoustic matching member disposed at an outer surface of the top; and
an insulating vibration suppressing member integrally formed in such a manner as to cover the piezoelectric member and the topped cylindrical metal case, the insulating vibration suppressing member having a hole reaching the supporter.
3. The ultrasonic wave transmitting and receiving unit according to claim 1 , wherein the hole is formed in at least three positions.
4. The ultrasonic wave transmitting and receiving unit according to claim 1 , wherein the hole is formed on a side of the piezoelectric member.
5. The ultrasonic wave transmitting and receiving unit according to claim 1 , wherein the hole is formed on a side of the acoustic matching member.
6. The ultrasonic wave transmitting and receiving unit according to claim 1 , wherein a peripheral projection is formed on a periphery of the insulating vibration suppressing member.
7. The ultrasonic wave transmitting and receiving unit according to claim 1 , wherein an axial projection is formed in an axial direction of the insulating vibration suppressing member.
8. An ultrasonic wave flow rate measuring apparatus comprising:
a flow rate measuring unit for measuring a flow rate of a fluid flowing on a channel;
a pair of the ultrasonic wave transmitting and receiving units according to claim 1 disposed in the flow rate measuring unit;
a projection for holding the ultrasonic wave transmitting and receiving unit at the hole;
a measuring unit for measuring an ultrasonic wave propagation time between the pair of ultrasonic wave transmitting and receiving units; and
a calculating unit for obtaining the flow rate of the fluid in response to a signal output from the measuring unit.
9. The ultrasonic wave transmitting and receiving unit according to claim 2 , wherein the hole is formed in at least three positions.
10. The ultrasonic wave transmitting and receiving unit according to claim 2 , wherein the hole is formed on a side of the piezoelectric member.
11. The ultrasonic wave transmitting and receiving unit according to claim 2 , wherein the hole is formed on a side of the acoustic matching member.
12. The ultrasonic wave transmitting and receiving unit according to claim 2 , wherein a peripheral projection is formed on a periphery of the insulating vibration suppressing member.
13. The ultrasonic wave transmitting and receiving unit according to claim 2 , wherein an axial projection is formed in an axial direction of the insulating vibration suppressing member.
14. An ultrasonic wave flow rate measuring apparatus comprising:
a flow rate measuring unit for measuring a flow rate of a fluid flowing on a channel;
a pair of the ultrasonic wave transmitting and receiving units according to claim 2 disposed in the flow rate measuring unit;
a projection for holding the ultrasonic wave transmitting and receiving unit at the hole;
a measuring unit for measuring an ultrasonic wave propagation time between the pair of ultrasonic wave transmitting and receiving units; and
a calculating unit for obtaining the flow rate of the fluid in response to a signal output from the measuring unit.
15. An ultrasonic wave flow rate measuring apparatus comprising:
a flow rate measuring unit for measuring a flow rate of a fluid flowing on a channel;
a pair of the ultrasonic wave transmitting and receiving units according to claim 3 disposed in the flow rate measuring unit;
a projection for holding the ultrasonic wave transmitting and receiving unit at the hole;
a measuring unit for measuring an ultrasonic wave propagation time between the pair of ultrasonic wave transmitting and receiving units; and
a calculating unit for obtaining the flow rate of the fluid in response to a signal output from the measuring unit.
16. An ultrasonic wave flow rate measuring apparatus comprising:
a flow rate measuring unit for measuring a flow rate of a fluid flowing on a channel;
a pair of the ultrasonic wave transmitting and receiving units according to claim 4 disposed in the flow rate measuring unit;
a projection for holding the ultrasonic wave transmitting and receiving unit at the hole;
a measuring unit for measuring an ultrasonic wave propagation time between the pair of ultrasonic wave transmitting and receiving units; and
a calculating unit for obtaining the flow rate of the fluid in response to a signal output from the measuring unit.
17. An ultrasonic wave flow rate measuring apparatus comprising:
a flow rate measuring unit for measuring a flow rate of a fluid flowing on a channel;
a pair of the ultrasonic wave transmitting and receiving units according to claim 5 disposed in the flow rate measuring unit;
a projection for holding the ultrasonic wave transmitting and receiving unit at the hole;
a measuring unit for measuring an ultrasonic wave propagation time between the pair of ultrasonic wave transmitting and receiving units; and
a calculating unit for obtaining the flow rate of the fluid in response to a signal output from the measuring unit.
18. An ultrasonic wave flow rate measuring apparatus comprising:
a flow rate measuring unit for measuring a flow rate of a fluid flowing on a channel;
a pair of the ultrasonic wave transmitting and receiving units according to claim 6 disposed in the flow rate measuring unit;
a projection for holding the ultrasonic wave transmitting and receiving unit at the hole;
a measuring unit for measuring an ultrasonic wave propagation time between the pair of ultrasonic wave transmitting and receiving units; and
a calculating unit for obtaining the flow rate of the fluid in response to a signal output from the measuring unit.
19. An ultrasonic wave flow rate measuring apparatus comprising:
a flow rate measuring unit for measuring a flow rate of a fluid flowing on a channel;
a pair of the ultrasonic wave transmitting and receiving units according to claim 7 disposed in the flow rate measuring unit;
a projection for holding the ultrasonic wave transmitting and receiving unit at the hole;
a measuring unit for measuring an ultrasonic wave propagation time between the pair of ultrasonic wave transmitting and receiving units; and
a calculating unit for obtaining the flow rate of the fluid in response to a signal output from the measuring unit.
20. An ultrasonic wave flow rate measuring apparatus comprising:
a flow rate measuring unit for measuring a flow rate of a fluid flowing on a channel;
a pair of the ultrasonic wave transmitting and receiving units according to claim 9 disposed in the flow rate measuring unit;
a projection for holding the ultrasonic wave transmitting and receiving unit at the hole;
a measuring unit for measuring an ultrasonic wave propagation time between the pair of ultrasonic wave transmitting and receiving units; and
a calculating unit for obtaining the flow rate of the fluid in response to a signal output from the measuring unit.
21. An ultrasonic wave flow rate measuring apparatus comprising:
a flow rate measuring unit for measuring a flow rate of a fluid flowing on a channel;
a pair of the ultrasonic wave transmitting and receiving units according to claim 10 disposed in the flow rate measuring unit;
a projection for holding the ultrasonic wave transmitting and receiving unit at the hole;
a measuring unit for measuring an ultrasonic wave propagation time between the pair of ultrasonic wave transmitting and receiving units; and
a calculating unit for obtaining the flow rate of the fluid in response to a signal output from the measuring unit.
22. An ultrasonic wave flow rate measuring apparatus comprising:
a flow rate measuring unit for measuring a flow rate of a fluid flowing on a channel;
a pair of the ultrasonic wave transmitting and receiving units according to claim 11 disposed in the flow rate measuring unit;
a projection for holding the ultrasonic wave transmitting and receiving unit at the hole;
a measuring unit for measuring an ultrasonic wave propagation time between the pair of ultrasonic wave transmitting and receiving units; and
a calculating unit for obtaining the flow rate of the fluid in response to a signal output from the measuring unit.
23. An ultrasonic wave flow rate measuring apparatus comprising:
a flow rate measuring unit for measuring a flow rate of a fluid flowing on a channel;
a pair of the ultrasonic wave transmitting and receiving units according to claim 12 disposed in the flow rate measuring unit;
a projection for holding the ultrasonic wave transmitting and receiving unit at the hole;
a measuring unit for measuring an ultrasonic wave propagation time between the pair of ultrasonic wave transmitting and receiving units; and
a calculating unit for obtaining the flow rate of the fluid in response to a signal output from the measuring unit.
24. An ultrasonic wave flow rate measuring apparatus comprising:
a flow rate measuring unit for measuring a flow rate of a fluid flowing on a channel;
a pair of the ultrasonic wave transmitting and receiving units according to claim 13 disposed in the flow rate measuring unit;
a projection for holding the ultrasonic wave transmitting and receiving unit at the hole;
a measuring unit for measuring an ultrasonic wave propagation time between the pair of ultrasonic wave transmitting and receiving units; and
a calculating unit for obtaining the flow rate of the fluid in response to a signal output from the measuring unit.