Smart height safety system
Apparatus and associated methods relate to a smart hook, a safety harness module, and associated electronic components that detect a safety state of a user by monitoring various parameters at the smart hook and safety harness module and determining whether the user is using proper safety protocol at extreme heights and/or whether the user has experienced a height-related accident. In an illustrative example, the user may don a safety harness that may include a module that contains sensors that monitor an acceleration/velocity/position of the user and/or ambient air pressure around the user. The module may receive wireless signals from at least one rebar hook having sensors that monitor the acceleration/velocity/position and gate position of the rebar hooks. A controller included with the safety harness module may use these sensors to advantageously determine the safety state of the user and generate alert/warning signals.
1. A safety monitoring apparatus comprising:
a monitoring module configured to couple to a safety harness, the monitoring module comprising:
a main acceleration sensor;
an air pressure sensor;
a controller coupled to the main acceleration sensor and configured to receive sensor readings from the main acceleration sensor, the controller also coupled to the air pressure sensor and configured to receive sensor readings from the air pressure sensor;
a receiver coupled to the controller;
a first rebar hook configured to couple to a distal end of a lanyard, the lanyard being configured to couple at a proximal end to the safety harness, the first rebar hook comprising:
a first acceleration sensor;
a first hook sensor configured to detect an open-closed state of the first rebar hook, the first hook sensor comprising a magnetic field sensor;
a first rebar hook transmitter coupled to the first acceleration sensor and first hook sensor, the first rebar hook transmitter being configured to transmit sensor readings from the first acceleration sensor and the first hook sensor to the receiver of the monitoring module; and
a first magnetic field generator that cooperates with the first hook sensor to detect the open-closed state of the first rebar hook, the monitoring module further comprising:
a main transmitter coupled to the controller and configured to transmit signals to a remote computing device.
2. The safety monitoring apparatus of claim 1 , wherein the magnetic field sensor comprises a Hall-effect sensor.
3. The safety monitoring apparatus of claim 1 , wherein the monitoring module further comprises a non-transitory computer readable medium containing instructions that, when executed, cause the controller to perform operations comprising:
determining whether vertical sensor readings from the main acceleration sensor have changed more than a minimum amount over a predetermined period of time;
in an instance in which the sensor readings from the main acceleration sensor have changed more than a minimum amount over a predetermined period of time, then assuming that a worker wearing the safety harness is in a vertical moving position;
recording the changes in the open-closed states of the first hook sensor over a time span;
determining whether a change in height as measured by the air pressure sensor has changed by more than a threshold height amount over the time span; and
in an instance in which the change in height as measured by the air pressure sensor has changed by more than a threshold height amount over the time span, then generating a violation signal indicative of the worker improperly using the first rebar hook.
4. The safety monitoring apparatus of claim 1 , wherein the monitoring module further comprises a non-transitory computer readable medium containing instructions that, when executed, cause the controller to perform operations comprising:
determining whether vertical sensor readings from the main acceleration sensor have changed more than a minimum amount over a predetermined period of time;
in an instance in which the sensor readings from the main acceleration sensor have not changed more than a minimum amount over a predetermined period of time, then assuming that a worker wearing the safety harness is in a horizontal moving position;
determining whether an acceleration reading of the main acceleration sensor is substantially the same as an acceleration reading of the first acceleration sensor; and
in an instance in which an acceleration reading of the main acceleration sensor is substantially the same as an acceleration reading of the first acceleration sensor, then generating a violation signal indicative of the worker improperly using the first rebar hook.
5. The safety monitoring apparatus of claim 1 , wherein the monitoring module further comprises a non-transitory computer readable medium containing instructions that, when executed, cause the controller to perform operations comprising:
determining whether the vertical sensor readings from the main acceleration sensor have been substantially equal to a local gravitational acceleration for more than a predetermined period of time;
in an instance in which the vertical sensor readings from the main acceleration sensor have been substantially equal to a local gravitational acceleration for more than a predetermined period of time, then assuming that a worker wearing the safety harness has fallen; and
transmitting to the remote computing device, via the main transmitter, an alert signal indicating that the worker wearing the safety harness has fallen.
6. The safety monitoring apparatus of claim 1 , wherein the main transmitter is configured to wirelessly transmit the sensor readings from the main acceleration sensor, the first acceleration sensor, and the first hook sensor to the remote computing device.
7. The safety monitoring apparatus of claim 6 , wherein the main transmitter is configured to wirelessly transmit signals to the remote computing device via a radio frequency channel.
8. The safety monitoring apparatus of claim 1 , wherein the first rebar hook transmitter is configured to transmit sensor readings from the first acceleration sensor and first hook sensor to the receiver of the monitoring module via a Bluetooth wireless channel.
9. A safety monitoring apparatus comprising:
a monitoring module configured to couple to a safety harness, the monitoring module comprising:
a main acceleration sensor;
a controller coupled to the main acceleration sensor and configured to receive sensor readings from the main acceleration sensor;
a receiver coupled to the controller; and
a first rebar hook configured to couple to a distal end of a lanyard, the lanyard being configured to couple at a proximal end to the safety harness, the first rebar hook comprising:
a first acceleration sensor;
a first hook sensor configured to detect an open-closed state of the first rebar hook, the first hook sensor comprising a magnetic field sensor;
a first rebar hook transmitter coupled to the first acceleration sensor and first hook sensor, the first rebar hook transmitter configured to transmit sensor readings from the first acceleration sensor and the first hook sensor to the receiver of the monitoring module; and
a first magnetic field generator that cooperates with the first hook sensor to detect the open-closed state of the first rebar hook, the monitoring module further comprising:
a main transmitter coupled to the controller and configured to transmit signals to a remote computing device.
10. The safety monitoring apparatus of claim 9 , wherein the magnetic field sensor comprises a Hall-effect sensor.
11. The safety monitoring apparatus of claim 9 , wherein the main transmitter is configured to wirelessly transmit the sensor readings from the main acceleration sensor, the first acceleration sensor, and the first hook sensor to the remote computing device.
12. The safety monitoring apparatus of claim 11 , wherein the main transmitter is configured to wirelessly transmit signals to the remote computing device via a radio frequency channel.
13. The safety monitoring apparatus of claim 9 , wherein the first rebar hook transmitter is configured to transmit sensor readings from the first acceleration sensor and first hook sensor to the receiver of the monitoring module via a Bluetooth wireless channel.
14. A safety monitoring apparatus comprising:
a monitoring module configured to couple to a safety harness, the monitoring module comprising:
a main acceleration sensor;
a controller coupled to the main acceleration sensor and configured to receive sensor readings from the main acceleration sensor;
a receiver coupled to the controller;
a rebar hook configured to couple to a distal end of a lanyard, the lanyard being configured to couple at a proximal end to the safety harness, the rebar hook comprising:
a rebar hook acceleration sensor;
a rebar hook sensor configured to detect an open-closed state of the rebar hook, the rebar hook sensor comprising a magnetic field sensor;
a rebar hook transmitter coupled to the rebar hook acceleration sensor, the rebar hook transmitter being configured to transmit sensor readings from the rebar hook acceleration sensor to the receiver of the monitoring module, the rebar hook transmitter also being configured to transmit the open-closed state of the rebar hook to the receiver of the monitoring module; and
a magnetic field generator that cooperates with the rebar hook sensor to detect the open-closed state of the rebar hook, the monitoring module further comprising:
a main transmitter coupled to the controller and configured to transmit signals to a remote computing device.
15. The safety monitoring apparatus of claim 14 , wherein the main transmitter is configured to wirelessly transmit signals to the remote computing device via a radio frequency channel.
16. The safety monitoring apparatus of claim 14 , wherein the magnetic field sensor comprises a Hall-effect sensor.
17. The safety monitoring apparatus of claim 14 , wherein the monitoring module further comprises a non-transitory computer readable medium containing instructions that, when executed, cause the controller to perform operations comprising:
determining whether vertical sensor readings from the main acceleration sensor have changed more than a minimum amount over a predetermined period of time;
in an instance in which the sensor readings from the main acceleration sensor have changed more than a minimum amount over a predetermined period of time, assuming that a worker wearing the safety harness is in a vertical moving position;
recording the changes in the open-closed states of the rebar hook sensor over a time span;
determining whether a change in height as measured by the air pressure sensor has changed by more than a threshold height amount over the time span; and
in an instance in which the change in height as measured by the air pressure sensor has changed by more than the threshold height amount over the time span, generating a violation signal indicative of the worker improperly using the rebar hook.
18. The safety monitoring apparatus of claim 14 , wherein the monitoring module further comprises a non-transitory computer readable medium containing instructions that, when executed, cause the controller to perform operations comprising:
determining whether vertical sensor readings from the main acceleration sensor have changed more than a minimum amount over a predetermined period of time;
in an instance in which the sensor readings from the main acceleration sensor have not changed more than a minimum amount over a predetermined period of time, then assuming that a worker wearing the safety harness is in a horizontal moving position;
determining whether an acceleration reading of the main acceleration sensor is substantially the same as an acceleration reading of the rebar hook acceleration sensor; and
in an instance in which an acceleration reading of the main acceleration sensor is substantially the same as an acceleration reading of the rebar hook acceleration sensor, then generating a violation signal indicative of the worker improperly using the rebar hook.
19. The safety monitoring apparatus of claim 14 , wherein the monitoring module further comprises a non-transitory computer readable medium containing instructions that, when executed, cause the controller to perform operations comprising:
determining whether the vertical sensor readings from the main acceleration sensor have been substantially equal to a local gravitational acceleration for more than a predetermined period of time;
in an instance in which the vertical sensor readings from the main acceleration sensor have been substantially equal to a local gravitational acceleration for more than a predetermined period of time, assuming that a worker wearing the safety harness has fallen; and
transmitting to the remote computing device, via the main transmitter, an alert signal indicating that the worker wearing the safety harness has fallen.
20. The safety monitoring apparatus of claim 14 , wherein the main transmitter is configured to wirelessly transmit the sensor readings from the main acceleration sensor, the rebar hook acceleration sensor, and the rebar hook sensor to the remote computing device.