US 12,133,102 B2
Wireless communication system for monitoring conditions and position of slave apparatus
Akito Murai, Kyoto (JP); Kentaro Hamana, Kyoto (JP); Manh Tai Nguyen, Kyoto (JP); and Yoshiki Sugimoto, Kyoto (JP)
Assigned to OMRON CORPORATION, Kyoto (JP)
Appl. No. 17/625,812
Filed by OMRON Corporation, Kyoto (JP)
PCT Filed Jul. 19, 2019, PCT No. PCT/JP2019/028468
§ 371(c)(1), (2) Date Jan. 10, 2022,
PCT Pub. No. WO2021/014494, PCT Pub. Date Jan. 28, 2021.
Prior Publication US 2022/0248242 A1, Aug. 4, 2022
Int. Cl. H04W 24/08 (2009.01); H04L 41/0604 (2022.01); H04W 4/38 (2018.01); H04W 84/20 (2009.01)
CPC H04W 24/08 (2013.01) [H04L 41/0618 (2013.01); H04W 4/38 (2018.02); H04W 84/20 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A wireless communication apparatus operable as a master apparatus for a wireless communication system including the master apparatus and at least one slave apparatus,
wherein the slave apparatus comprises a sensor configured to obtain a measurement value of a predetermined physical quantity, and the slave apparatus wirelessly transmits the measurement value of the sensor to the wireless communication apparatus,
wherein the wireless communication apparatus comprises:
a signal receiving circuit configured to wirelessly receive the measurement value of the sensor from the slave apparatus;
a position estimator configured to estimate a position of the slave apparatus;
a storage device configured to store a history of the position of the slave apparatus; and
a master control circuit configured to display the measurement value of the sensor and the position of the slave apparatus on a display device,
wherein, when the master control circuit fails to receive the measurement value of the sensor from the slave apparatus, the master control circuit displays, on the display device, a latest position stored in the storage device, together with an error message indicating that communication between the wireless communication apparatus and the slave apparatus is interrupted, and
wherein the storage device stores a history of the measurement value of the sensor, and
wherein, when the measurement value of the sensor is unchanged for a predetermined time period, the master control circuit displays, on the display device, an error message indicating that malfunction of the sensor has occurred.