http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H02193026-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_79cd6481d8dc6f8fdd1217d2401ba1b2 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01H11-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01H17-00 |
| filingDate | 1989-01-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c6170ef371c2e3e74bcb57a249ca9357 |
| publicationDate | 1990-07-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H02193026-A |
| titleOfInvention | Automatic electrode interval setting apparatus in measurement of characteristics of vibration piece |
| abstract | PURPOSE: To enable smooth measurement with a gap being controlled automatically to a fixed value between an electrode for measurement and a vibration piece by arranging an actuator and a pair of an electrode and a capacitance detector. n CONSTITUTION: After a vibration piece FR as reference is inserted between electrodes A and D, a reference voltage VR to be applied to an non-inversion input terminal of an operational amplifier OP is adjusted to set a size of a gap G via an increase or decrease in an output voltage of the amplifier OP and an extension of an actuator E so that it becomes suitable for a characteristic test of the vibration piece FX. Then, in the replacing of the vibration FR for a desired vibration piece FX, when a thickness of the vibration piece FX differs from that of the vibration piece FR, the size of the gap G varies to change a capacitance between electrodes if the electrodes are fixed. But as a gain of the amplifier OP is larger than 1, an interval between the electrodes A and D is controlled with an actuator E connected to an output of the amplifier OP so that a DC voltage VT of a capacitance detector DETC is equal to the voltage VR. Therefore, the capacitance between the electrodes is kept constant to maintain the size of the gap G as well. n COPYRIGHT: (C)1990,JPO&Japio |
| priorityDate | 1989-01-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
| Predicate | Subject |
|---|---|
| isDiscussedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/compound/CID8987 http://rdf.ncbi.nlm.nih.gov/pubchem/substance/SID419487887 |
Total number of triples: 13.