Wireless sensor system

Abstract

A wireless sensor system according to the invention has a wireless sensor device for detecting opening and closing of a door or a window, and a wireless base station for exchanging data with the wireless sensor device 2 by wireless. A detected direction setting portion for setting a direction where an acceleration is detected and a sensitivity level setting portion for setting a sensitivity level of the wireless sensor device are located on the wireless base station side so as to set the detected direction and the sensitivity level on the wireless base station side. Then, it is not necessary to set both on the wireless sensor device, and the setting is simple, thereby.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view showing one example of the whole formation of a wireless sensor system according to the invention;

FIG. 2 is a block diagram indicating one example of a formation of a wireless sensor device;

FIG. 3 is a block diagram indicating one example of a formation of a wireless base station;

FIG. 4 is a typical view showing one example of a screen which is displayed on a monitor of a personal computer;

FIG. 5 is a typical view for explaining a method of setting a direction where an acceleration is detected;

FIG. 6 is a view showing a wave form of an analog output of an acceleration sensor;

FIG. 7 is a characteristic view showing a characteristic of temperature dependency of an acceleration sensor output; and

FIG. 8 is a typical view showing one example of a structure of a conventional wireless sensor system.

Claims

1. Wireless sensor system having a wireless sensor device and a wireless base station, for exchanging data by wireless, comprising: said wireless sensor device having an acceleration sensor for detecting whether a movable body, such as a door and a window, is moved or not, a sensor-side transmitting and receiving portion for exchanging data with said wireless base station, and a CPU; andsaid wireless base station having a base station-side transmitting and receiving portion for exchanging said data with said wireless sensor device, a detected direction setting portion for setting a direction where an acceleration is detected, and a sensitivity level setting portion for setting a sensitivity level of said acceleration sensor.

2. The wireless sensor system according to claim 1, wherein said wireless sensor device has a threshold value output portion for outputting a threshold value which is a basis for judging whether said movable body is moved or not, and a movement judging portion for judging whether said movable body is moved or not by comparing said threshold value outputted from said threshold value output portion and an output from said acceleration sensor with each other.

3. The wireless sensor system according to claim 2 wherein said wireless sensor device has an average computing portion for computing an average of an output from said acceleration sensor, and a threshold value computing portion for computing a threshold value on the basis of a value computed by said average computing portion, and said threshold value computed by said threshold value computing portion is inputted into said threshold value output portion.