Do you develop for mobile? Than you need a proper gyroscope emulator.
This emulator allows you to dynamically change rotation of a mobile device and also sends deviceorientation events to your web app.
NEW in v0.3.0:
Chrome Developer Tools integration
For more details check out
https://github.com/janantala/Gyrocopter
谷歌浏览器、其他Chromium内核的浏览器