Pendulum-based laser leveling device with calibration guard function

Patent metadata

Field	Value
Publication number	US-10739124-B2
Application number	US-201816028753-A
Country	US
Kind code	B2
Filing date	Jul 6, 2018
Priority date	Jul 6, 2017
Publication date	Aug 11, 2020
Grant date	Aug 11, 2020

Abstract

A pendulum-based laser leveling device comprises a micro controller unit connected to a shock sensor for sensing a shock experienced by the laser leveling device. The micro controller unit is configured to send out a warning message when the magnitude of the shock sensed by the shock sensor exceeds a shock threshold.

First claim

The invention claimed is:

1. A laser leveling device ( 1 ) comprising:
a shock sensor ( 13 ) for sensing a shock experienced by the laser leveling device ( 1 ); and
a micro controller unit (MCU, 10 ) connected to the shock sensor ( 13 );
wherein the MCU ( 10 ) is configured to send out a warning message when the magnitude of the shock sensed by the shock sensor ( 13 ) exceeds a shock threshold.

2. The laser leveling device of claim 1 , wherein the MCU ( 10 ) is further configured to send out a warning message when the temperature of the environment in which the device is located or the temperature inside the device exceeds a temperature limit.

3. The laser leveling device of claim 2 , wherein the temperature is sensed by a temperature sensor connected to the MCU ( 10 ) or by the build in function of the MCU ( 10 ).

4. The laser leveling device of claim 2 , wherein the temperature limit of the environment in which the device is located is about −20° C. to 70° C.

5. The laser leveling device of claim 1 , wherein the MCU ( 10 ) is further configured to send out a warning message when the operation time of the laser leveling device reaches a regular checkup time.

6. The laser leveling device of claim 5 , wherein the regular checkup time comprises a fixed time period or/and a permitted total working time from the latest periodical accuracy calibration of the laser leveling device ( 1 ).

7. The laser leveling device of claim 1 , further comprising a connectivity module ( 14 ) for establishing communication between the MCU ( 10 ) and a smartphone ( 8 ) with APP implementation for the laser leveling device ( 1 ).

8. The laser leveling device of claim 1 , wherein the MCU ( 10 ) is configured to send out the warning message when the magnitude of the shock sensed by the shock sensor ( 13 ) exceeds the shock threshold via a human machine interface ( 7 ) of the laser leveling device and/or via the smartphone ( 8 ).

9. The laser leveling device of claim 5 , wherein the operation time of the laser leveling device is tracked by the build in function of the MCU ( 10 ) or by the smartphone.

10. The laser leveling device of claim 1 , wherein the MCU ( 10 ) is further configured to be used to report the accuracy of the laser leveling device via the HMI ( 7 ) of the laser leveling device and/or via the smartphone ( 8 ).

11. The laser leveling device of claim 1 , wherein the warning message includes a suggestion on checking the accuracy of the laser leveling device, stopping the operation of the laser leveling device ( 1 ) or reducing the operation power of the laser leveling device ( 1 ).

12. The laser leveling device of claim 11 , further comprising a user manual for guiding the user to check the accuracy of the laser leveling device.

Assignees

• Bosch Gmbh Robert

Inventors

• Yuen Hung-Ying
• Chan Louis
• Kohlert Thomas

Classifications

• G01C15/004 Primary

  Reference lines, planes or sectors · CPC title

• G01C2009/066

  optical · CPC title

• G01B7/30 Primary

  for measuring angles or tapers; for testing the alignment of axes · CPC title

• G01C25/00

  Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass (testing, calibrating or compensating compasses G01C17/38) · CPC title

• G01C9/12

  by using a single pendulum (plumb lines G01C15/10) · CPC title