ELECTROSTATIC CAPACITANCE DETECTION DEVICE AND IMAGE READING DEVICE

• Main Authors: ARAKI HIROSHI, MATSUI HIDEKI, MAKABE KAZUYA, MIYATA TOMOYUKI, SHOJI TOSHIAKI, OGOMI TOMOKAZU, KAGANO MIKI
• Format: Patent
• Language: English; Japanese
• Published: 14.06.2018
• Subjects: CHECKING-DEVICES; HANDLING OF COINS OR OF PAPER CURRENCY OR SIMILAR VALUABLEPAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING,DISPENSING, CHANGING OR DEPOSITING; PHYSICS

PROBLEM TO BE SOLVED: To simplify and downsize a structure of an electrostatic capacitance detection device.SOLUTION: An electrostatic capacitance detection device 20 includes a first electrode 1 and a second electrode 2 partially facing each other across a conveyance path 5. An oscillation circuit allows the first electrode 1 and the second electrode 2 to form an electric field therebetween. A detection circuit detects a change in electrostatic capacitance between the first electrode 1 and the second electrode 2. A first flat plate 6 is an insulating flat plate having the first electrode 1 formed thereon. A second flat plate 7 is an insulating flat plate having the second electrode 2 formed thereon. Transmittance of light emitted from a light source 18a is a threshold value or more in at least one of the first flat plate 6 and the second flat plate 7.SELECTED DRAWING: Figure 8 【課題】静電容量検出装置の構造の簡易化及び小型化を行う。【解決手段】静電容量検出装置２０は、搬送路５を挟んで、少なくとも一部が対向する第１電極１及び第２電極２を備える。発振回路は、第１電極１と第２電極２との間に電界を形成させる。検出回路は、第１電極１と第２電極２との間の静電容量の変化を検出する。第１平板６は、第１電極１が形成された絶縁性の平板である。第２平板７は、第２電極２が形成された絶縁性の平板である。第１平板６及び第２平板７の少なくとも一方における、光源１８ａから出射される光の透過率は閾値以上である。【選択図】図８