1. A spherical ultrasonic motor comprising:
a rotor having a curved surface part;
a plurality of stators which are arranged at predetermined intervals in contact with surfaces of the rotor and to which two-phase drive signals are supplied to generate ultrasonic vibrations;
a plurality of oscillation units which are provided corresponding to the plurality of stators and which generate two-phase drive signals of predetermined frequencies based on inputted frequency control signals;
a plurality of phase control units which are provided corresponding to the plurality of stators and which adjust phase differences of two-phase drive signals generated at the plurality of oscillation units based on inputted phase control signals; and
a control unit which outputs frequency control signals for adjusting frequencies of two-phase drive signals which are generated at the plurality of oscillation units to the target frequencies, to the plurality of oscillation units to cause the plurality of oscillation units to adjust frequencies of two-phase signals which are generated at the plurality of oscillation units to the target frequencies, and outputs phase control signals for adjusting phase differences of two-phase drive signals generated at the plurality of oscillation units to target phase differences, to the plurality of phase control units to cause the plurality of phase control units to adjust phase differences of two-phase drive signals which are generated at the plurality of oscillation units to the target phase differences,
wherein two-phase drive signals whose frequencies have remained unchanged from initial frequencies and whose phase differences have been adjusted to target phase differences are supplied from respective phase control units of the plurality of phase control units to respective corresponding stators, and thereafter, two-phase drive signals whose phase differences have remained unchanged from initial phase differences and whose frequencies have been adjusted to target frequencies are supplied from respective phase control units of the plurality of phase control units to respective corresponding stators concurrently.
2. The spherical ultrasonic motor according to claim 1, wherein the control unit determines the target frequencies such that a ratio of sizes of angular velocity vectors by ultrasonic vibrations generated at respective stators of the plurality of stators, to which the two-phase drive signals have been supplied, whose frequencies and phase differences having been adjusted to the target frequencies and phase differences, respectively, is constant before and after adjusting the frequencies of the two-phase drive signals supplied to the plurality of stators.
3. The spherical ultrasonic motor according to claim 1, wherein the control unit sets a target phase difference of a two-phase drive signal which is supplied to at least one of the plurality of stators at 90\xb0.
4. The spherical ultrasonic motor according to claim 1, further comprising:
a rotation-axis-direction inputting unit which gives an instruction regarding a direction of a rotation axis of the rotor; and
a rotation speed inputting unit which gives an instruction regarding a rotation speed of the rotor;
wherein the control unit outputs phase control signals that are based on the instruction regarding the direction of the rotation axis of the rotor from the rotation-axis-direction inputting unit, to the plurality of phase control units, and frequency control signals that are based on the instruction regarding the rotation speed of the rotor from the rotation speed inputting unit, to the plurality of oscillation units.
5. The spherical ultrasonic motor according to claim 1, wherein the plurality of stators includes three stators.
6. The spherical ultrasonic motor according to claim 1, wherein the rotor is formed in a substantially spherical shape.
7. A control method for a spherical ultrasonic motor, comprising:
a first step that a control unit of the spherical ultrasonic motor determines target phase differences of two-phase drive signals to be supplied to a plurality of stators contacting surfaces of a rotor of the spherical ultrasonic motor, based on a target direction of a rotation axis of the rotor, and generates phase control signals for adjusting phase differences of the two-phase drive signals to be supplied to the plurality of stators to the target phase differences;
a second step that the control unit determines target frequencies of two-phase drive signals to be supplied to the plurality of stators, based on a target rotation speed of the rotor, and generates frequency control signals for adjusting frequencies of two-phase drive signals to be supplied to the plurality of stators to the target frequencies;
a third step of inputting respective frequency control signals generated in the second step to respective oscillation units of a plurality of oscillation units provided corresponding to the plurality of stators and configured to generate two-phase drive signals to be supplied to the plurality of stators, adjusting frequencies of two-phase drive signals to be supplied to the plurality of stators, which are generated at the plurality of oscillation units, to the target frequencies, at the plurality of the oscillation units, and outputting the two-phase drive signals to be supplied to the plurality of stators, whose frequencies have been adjusted to the target frequencies, from the plurality of oscillation units, respectively;
a fourth step of inputting respective phase control signals generated in the first step to respective phase control units of a plurality of phase control units provided corresponding to the plurality of stators, adjusting phase differences of the two-phase drive signals outputted from the plurality of oscillation units to the target phase differences at the plurality of phase control units, and outputting the two-phase drive signals to be supplied to the plurality of stators, whose phase differences have been adjusted to the target phase differences, from the plurality of phase control units; and
a fifth step of supplying two-phase drive signals whose frequencies have remained unchanged from initial frequencies and whose phase differences have been adjusted to target phase differences by the third step and the fourth step, from respective phase control units of the plurality of phase control units to respective corresponding stators; and
a sixth step of supplying two-phase drive signals whose phase differences have remained unchanged from initial phase differences and whose frequencies have been adjusted to target frequencies by the third step and the fourth step, from respective phase control units of the plurality of phase control units to respective corresponding stators, concurrently, after completion of the fifth step.
8. The method according to claim 7, wherein in the second step, the target frequencies are determined such that a ratio of sizes of angular vectors by ultrasonic vibrations generated at respective stators of the plurality of stators, to which the two-phase drive signals have been supplied, whose frequencies and phase differences having been adjusted to the target frequencies and phase differences, respectively, is constant before and after adjusting the frequencies and the phase differences of the two-phase drive signals supplied to the plurality of stators.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An anti-germination method for bulbs and tubers including the application to said bulbs or tubers of a treatment composition based on an active principle selected from eugenol, a salt of eugenol fit for human consumption, isoeugenol, a salt of isoeugenol fit for human consumption and mixtures thereof or clove oil, said method including the application by sprinkling, spraying or immersion at ambient temperature of said composition on the bulbs and tubers after storage.
2. A treatment method according to claim 1, wherein the method includes the step of subjecting said bulbs and tubers to treatment by sprinkling or spraying with said treatment composition or by immersion in said treatment composition, after storage of the bulbs and tubers.
3. A treatment method according to claim 1, wherein the active principle is clove oil.
4. A treatment method according to claim 3, wherein said clove oil is completely or partially salified.
5. A treatment method according to claim 1, wherein the active principle is eugenol, a salt of eugenol fit for human consumption, and mixtures thereof.
6. A treatment method according to claim 1, wherein the treatment composition is applied continuously or repeatedly to said bulbs and tubers.
7. A treatment method according to claim 1, wherein said composition prior to optional dilution comprises from 15 to 40% of active principle.
8. A method according to claim 7, wherein the composition comprises, prior to optional dilution, 25% of clove oil.
9. A method according to claim 1, wherein said composition comprises, prior to optional dilution, from 60 to 85% of emulsifiers.
10. A method according to claim 1, wherein said composition comprises, prior to optional dilution, 75% of emulsifiers.
11. A method according to claim 9, wherein said emulsifiers comprise condensation products with fatty alcohols andor acids.
12. A method according to claim 11, wherein said emulsifiers comprise ethoxylated lauryl alcohol, ethoxylated oleic acid andor mixtures thereof.
13. A method according to claim 1, wherein the tubers are potato tubers.
14. A composition comprising:
from 15 to 40% of eugenol, a salt of eugenol fit for human consumption, isoeugenol, a salt of isoeugenol fit for human consumption and mixtures thereof or clove oil,
from 60 to 85% of emulsifiers.
15. A composition according to claim 14, wherein the composition comprises 25% of clove oil.
16. A composition according to claim 14, wherein the composition comprises from 70 to 80% of emulsifiers.
17. A composition according to claim 14, wherein the composition comprises 75% of emulsifiers.
18. A composition according to claim 14, wherein said emulsifiers comprise condensation products from fatty alcohols andor acids.
19. A composition according to claim 18, wherein said emulsifiers comprise ethoxylated lauryl alcohol, ethoxylated oleic acid andor mixtures thereof.
20. A composition according to claim 19, such that said emulsifiers are selected from among ethoxylated lauryl alcohol 11 mol, ethoxylated oleic acid 6 mol and ethoxylated oleic acid 10 mol andor mixtures thereof.
21. A composition according to claim 14, such that said emulsifiers are composed of:
from 10 to 40% of condensation products from lauryl alcohol, and
from 50 to 90% of condensation products from oleic acid and oleic acid andor mixtures thereof.
22. A composition according to claim 14, such that said emulsifiers are composed of:
from 10 to 40% of ethoxylated lauryl alcohol 11 mol, and
from 50 to 90% of ethoxylated oleic acid 6 mol and ethoxylated oleic acid 10 mol andor mixtures thereof.
23. A composition diluted with a composition according to claim 14 at a level of from 2% to 50%.
24. Use of a composition according to claim 23 for sprinkling, spraying or immersion on bulbs andor tubers at ambient temperature for anti-germinating purposes.