This is an automatic personal alarm that is triggered automatically if a person is in an emergency situation and is unable to activate an alarm manually.
By triggering the rest alarm, emergencies do not go unnoticed by employees, even if they are unable to move due to injury or unconsciousness. Automatic accident detection means that emergency situations can be dealt with more quickly.
Advances in technology are also opening up new opportunities to further optimize the silent alarm and adapt it to different working environments in order to continuously improve employee safety.
The most important facts in brief
✓ The rest alarm is used for automatic emergency detection in the event of immobility in emergency situations, e.g. due to injuries or unconsciousness.
✓ Sensors in personal emergency signal devices, dead man's switches or emergency apps are used to detect motionlessness. A pre-alarm signals and the silent alarm triggers if there is no movement.
✓ Especially when working alone or in dangerous environments, it is important to call for help quickly and provide first aid if the employee is no longer able to do so themselves.
How does the silent alarm work?
When the rest alarm is activated, the sensors of a device (e.g. personal emergency signal device, dead man's switch or smartphone) regularly check whether the user is on the move.
If the movement detected by the device falls below the threshold value defined by the movement sensitivity, it is assumed that the person may be unable to move, e.g. due to unconsciousness.
The time that elapses before the alarm is triggered after motionlessness is detected can be preconfigured on most personal emergency signal devices or emergency apps on smartphones. First, a pre-alarm is activated, which is signaled visually and acoustically.
If the person does not start moving again during the pre-alarm and deactivates the pre-alarm, the personal alarm is triggered and the emergency contacts are automatically informed of the emergency. The alarm can also be forwarded to a personal emergency signal receiving center (PNEZ) and processed there.
The silent alarm can be configured individually for the corresponding personal emergency signal devices (PNG) or emergency apps. The setting parameters are the time interval (after how many minutes of motionlessness should the alarm be triggered) and the sensitivity of the motion detection.
The time interval and sensitivity of the sensors are based on the user's occupational activity level. This enables more precise monitoring and reliable triggering of the alarm so that help can be summoned in good time, even if the person is unconscious, for example after a fall.
Why is a quiet alarm important in occupational safety?
The use of a silence alarm on a personal emergency signal device (PNG), dead man's switch or in an emergency app is particularly useful for lone working with potential hazards, even if the employees only work alone temporarily. Lone working means that the employee is working at the workplace out of call and sight of other people.
This can mean that no one is available to provide first aid or call the emergency services in an emergency. It is therefore important that suitable emergency notification systems are implemented at individual workstations.
Working alone is part of everyday working life in many industries. In particular, people often work alone on extensive company premises, in winding halls or in mobile work (e.g. in maintenance, assembly or care).
In order to be able to introduce effective measures for lone worker protection in the respective company, potential risks and hazards must first be classified as part of a risk assessment.
As a function of a personal emergency signal system (PNA), dead man's device or an emergency app, the silent alarm is part of a technical measure to protect employees when working alone, as emergency contacts are quickly informed of the incident in emergency situations and first aid can be provided quickly despite the absence of people. Especially if the lone worker is unable to trigger an alarm manually, e.g. due to an attack of weakness.
This means that the rescue chain can be set in motion without delay. An improved response time in an emergency can be crucial in saving lives and preventing serious damage.
The quicker the response to an emergency, the better the chances of a rapid recovery. In addition, the risk of complications or consequential damage is minimized. The rest alarm is therefore an important part of occupational safety to protect the health and well-being of employees.
How does the rest alarm work in a dead man's switch?
The dead man' s switch is known by many names: Dead man's switch, dead man's warning device, motionless detector or simply dead man's device. It is an important part of occupational safety and checks whether the employee is able to act.
The dead man's detector is either built into work equipment or vehicles, integrated into a smartphone app or attached to a person's work clothing as a mobile device .
In the case of dead-man devices, the rest alarm works as follows: The user holds down the dead man's button on the switch so that the machine can only be operated as intended by pressing the button.
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The pre-alarm is activated if the person is unable to move and therefore does not press the button. If the person does not move within this time or does not acknowledge the alarm, the alarm is triggered and the emergency contacts are notified by phone call, text message or e-mail. During the pre-alarm, it can be canceled at any time by pressing the alarm button.
In the case of a mobile dead man's detector, there must be an impact or an abrupt stop. The dead man's detector must then remain motionless for at least 10 seconds. The dead man's detector not only reacts to immobility, but also triggers an alarm if a person is in a horizontal position, regardless of how they got into this position. This is known as a position alarm and works in a similar way to the rest alarm.
How is the silent alarm activated with CALIMA?
The rest alarm, also known as the movement alarm, is integrated into the "accident detection" function in CALIMA. When accident detection is activated, CALIMA uses the smartphone's sensors to analyze the employee's movements.
If CALIMA detects motionlessness or a fall, an alarm is triggered automatically after a preset time. If motionlessness is detected, e.g. by putting the smartphone down during a break and is therefore triggered inadvertently, the user can deactivate the alarm manually during a pre-alarm before it is triggered.
If the alarm is not deactivated, it is transmitted to the CALIMA server via the smartphone's Internet connection (mobile or WLAN) and forwarded from there to the predefined emergency contacts.
The stored emergency contacts can be alerted by phone call, text message and/or email as required. The text message and e-mail contain a link to a live application with all the information about the alarm. You can find more information about CALIMA's Features here.
Conclusion: Reliable detection of emergency situations
The silent alarm is an effective and reliable method of automatically detecting potential emergency situations. By automatically activating an alarm after a certain period of immobility, the silent alarm enables assistance to be provided quickly, even if the person is unconscious.
Whether in the form of personal emergency signal devices, dead man's switches or emergency apps, the silent alarm helps to improve response times in an emergency and effectively protect employees working alone in hazardous working environments. Emergency signaling devices and smartphone apps with a silent alarm function are already being used successfully in various industries. The silent alarm is an emergency signal that is triggered by a personal emergency signal system (PNA ), a dead man's device in a dead man's switch or an emergency app on a smartphone after a specified time if a person is motionless and alerts the emergency contacts.
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