Wireless vibration sensor

Abstract

To provide a wireless vibration sensor suitable for monitoring devices via push notifications, we offer a sensor that contributes to preventing unnecessary data collection and reducing the amount of data transferred. [Solution] The above-mentioned problem is solved by a wireless vibration sensor comprising a first acceleration sensor, a second acceleration sensor, a signal processing unit, and a communication circuit, which monitors a measurement target in operation and transmits its vibration data to the outside, wherein the first acceleration sensor measures primary data of the measurement target which forms the basis of the vibration data to be transmitted to the outside, and does not operate in a standby mode but operates in a normal mode, the second acceleration sensor detects the state of the measurement target in order to determine whether or not the measurement target is in operation, and if it is determined that the measurement target is in operation based on the state detection of the second acceleration sensor, it transitions from the standby mode to the normal mode.

Claims

[Claim 1] A wireless vibration sensor comprising a first acceleration sensor, a second acceleration sensor, a signal processing unit, and a communication circuit, which monitors a measurement target in operation and transmits its vibration data to an external source, The first acceleration sensor measures primary data of an operating object that forms the basis for vibration data transmitted externally, and operates in normal mode only, not in idle mode. The second acceleration sensor detects the state of the object to be measured in order to determine whether or not the object to be measured is in operation. If the state detection of the second acceleration sensor determines that the object to be measured is operating, the system will switch from the idle mode to the normal mode. The signal processing unit determines whether or not the object to be measured is operational. In this determination, it includes a false detection prevention function that prevents the incorrect determination that the object to be measured is operational due to disturbances by monitoring the duration of the period in which the acceleration detected by the second acceleration sensor exceeds a threshold. A wireless vibration sensor characterized by the following features. [Claim 2] A wireless vibration sensor comprising a first acceleration sensor, a second acceleration sensor, a signal processing unit, and a communication circuit, which monitors a measurement target in operation and transmits its vibration data to an external source, The first acceleration sensor measures primary data of an operating object that forms the basis of vibration data transmitted externally, and does not operate in standby mode but performs periodic measurements in normal mode. The second acceleration sensor detects the state of the object to be measured in order to determine whether or not the object to be measured is in operation. If the state detection of the second acceleration sensor determines that the object to be measured is operational, the periodic measurement will be performed; however, if it is determined that the object to be measured is not operational, the periodic measurement will not be performed. A wireless vibration sensor characterized by the following features. [Claim 3] The aforementioned false detection prevention function is provided by the microcontroller, The first step is to receive an instantaneous change in acceleration from the static acceleration detected by the second acceleration sensor. Following the first step, a second step is performed in which the continuous dynamic acceleration detected by the second acceleration sensor is received and the duration of the dynamic acceleration is monitored. In the second step, if it is determined that the object to be measured has stopped, a third step is performed to return to the first step. In the second step, if it is determined that the object to be measured is in operation, the fourth step is to switch to the normal mode. This is achieved by executing the command. The wireless vibration sensor according to feature 1. [Claim 4] When the system switches to the normal mode, the second acceleration sensor stops operating. A wireless vibration sensor according to any one of claims 1 to 3. [Claim 5] The first acceleration sensor is a high-sensitivity vibration sensor, The second acceleration sensor is a low-power vibration sensor. A wireless vibration sensor according to any one of claims 1 to 3. [Claim 6] The system includes a vibration data storage unit that stores vibration data of a target being measured by the first acceleration sensor, and transmits the vibration data stored in the vibration data storage unit to the outside in response to an external request. A wireless vibration sensor according to any one of claims 1 to 3. [Claim 7] The system includes a state data storage unit that stores state data of the object being measured by the second acceleration sensor, and transmits the state data stored in the state data storage unit to the outside in response to an external request. A wireless vibration sensor according to any one of claims 1 to 3.

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