公开(公告)号：US20240094720A1

公开(公告)日：2024-03-21

申请号：US18522748

申请日：2023-11-29

Applicant: DENSO CORPORATION

Inventor： Yuji KOYAMA ,  Kazuaki MAWATARI

IPC: G05B23/02

CPC classification number: G05B23/024 ,  G05B2223/02

Abstract: In a facility state monitoring system, a sensor node includes a sensor that outputs, as sensor data, data indicating the state of a facility as a monitoring target, a communication unit, and a power supply unit that supplies power to the sensor and the communication unit. The sensor node is commonly used by multiple monitoring targets. A receiver receives the sensor data transmitted from the communication unit. A state detection unit receives the sensor data received by the receiver, and learns, as learning data, normal states of the monitoring targets based on normal sensor data corresponding to normal operations of the monitoring targets. In response to the receiver receiving the sensor data transmitted from the sensor node after learning, the state detection unit compares states of the monitoring targets indicated by the sensor data with the learning data to detect an abnormality occurrence or symptom in the monitoring targets.

公开(公告)号：US20230363280A1

公开(公告)日：2023-11-09

申请号：US18356487

申请日：2023-07-21

Applicant: DENSO CORPORATION

Inventor： Minekazu SAKAI ,  Kazuaki MAWATARI ,  Yuji KOYAMA ,  Masaaki TANAKA ,  Tomoya JOMORI ,  Yuhei SHIMIZU

IPC: H10N30/00 ,  H10N30/853 ,  H10N30/074

CPC classification number: H10N30/10516 ,  H10N30/853 ,  H10N30/074

Abstract: A piezoelectric element includes a support and a vibration unit disposed on the support. The vibration unit includes a piezoelectric film and an electrode film connected to the piezoelectric film to extract charges generated by deformation of the piezoelectric film. The vibration unit has a support region supported on the support, and a vibration region connected to the support region and floating from the support. The vibration unit outputs a pressure detection signal based on the charges. The vibration region includes a plurality of slits extending from a support region side toward a center of the vibration region and is in a state of being supported at both ends with respect to the support region.