DE202010012023U1 - OSH system - Google Patents

Abstract

Occupational health and safety system (10), comprising - protective equipment (14) for a person (12) on duty, - a mobile communication unit (16) which the person (12) must carry with him on duty, - a control device (20) which is used in the Work deployment is arranged at a distance from the mobile communication unit (16), and wireless communication means (49, 50) for establishing a wireless communication link between the control device (20) and the mobile communication unit (16), characterized by a body function sensor arrangement (18), which is from of the person (12) is to be carried along during work and which detects at least one monitoring variable related to a body function of the person (12), the body function sensor arrangement (18) being connected to the mobile communication unit (16), and the mobile communication unit (16) monitoring information via the wireless communication means (49, 50) during work transmission to the control device (20) on the basis of the at least one monitoring variable.

Description

The present invention relates to an occupational safety system comprising a protective equipment for a person in the work, a mobile communication unit, which is to be carried by the person in the work, a control device, which is located in the labor input at a distance from the mobile communication unit, and wireless communication means for producing a wireless communication link between the controller and the mobile communication unit.

Such occupational health and safety systems are used wherever people are exposed to special risks to their health during work assignments. Important examples are systems for firefighters or technical relief workers who are protected during their work by appropriate protective clothing, protective suits, respirators, etc. against harmful gases, dusts, cold, heat and flames or even radiation, or systems for Professional divers who carry diver equipment in a rescue or other work assignment.

In known system, the people in the work are often on a radio system in communication with each other or with an operations center, z. B. a mobile control unit. If a task force engages in a health or even life-threatening emergency situation during work assignment, the task force can use the speech connection to call a nearby emergency service for help, or request the operations center to initiate appropriate rescue measures. In addition, known occupational safety systems for firefighters often include a so-called "dead man's switch", which is carried by the task force in the labor input and can detect a motionlessness of the emergency force when the person loses consciousness or is trapped (motion-fixed). The deadman switch then sends an audible alarm.

Although the known occupational safety systems can in some cases increase the safety of the emergency services, they have the deficits explained below, which the inventor of the present invention has recognized as the cause of recurring tragic incidents.

A disadvantage of the known radio communication system is that the emergency response force can only report an emergency situation in the form of a deteriorated state of health if the emergency services are aware of the deteriorated state of health and, in addition, are able and willing to speak. For example, the message transmitted to the operations management, for example, is strongly influenced by a number of subjective factors and is often difficult to understand acoustically. In a stress situation that is often present in the systems in question, the task force is often so distracted that they do not even recognize and communicate any deterioration in their state of health, for example through the effects of fumes, until they are no longer able to transmit a meaningful message is. In addition, it must be ensured in deployments with several people by appropriate personnel in the operations center that the radio of each task force is always reliably monitored by a person acoustically in order to respond to a call for help appropriately in time.

The known "deadman switch" have the disadvantage that they send out an emergency call if the emergency force is trapped or fixed or already has lost consciousness and, for example, lies on the ground. In many situations, however, it is already too late to find, rescue and resuscitate the unconscious and possibly injured person under sometimes extreme conditions of use. In addition, for example, in a larger building, the audible warning sound of a deadman switch from the operation line can not be heard.

Against this background, it is an object of the present invention to provide a health and safety system, with which a health-endangering emergency situation for a person in the labor input can be detected more reliably and early and the person can be better protected in the labor input.

According to a first aspect, the invention proposes to solve this problem an occupational safety system, comprising a protective equipment for a person in the work, a mobile communication unit, which is carried by the person in the labor input, a control device, which in the labor input at a distance from the mobile communication unit arranged, wireless communication means for establishing a wireless communication connection between the control device and the mobile communication unit, and a body function sensor arrangement, which is carried by the person in the working operation and which detects at least one on a person's body function monitoring size, wherein the body function sensor arrangement with the mobile communication unit in Connection stands, and wherein the mobile communication unit in the work using the wireless communication means monitoring information based the at least one monitoring quantity transmits to the control device.

According to the invention, the occupational health and safety system thus has a body function sensor arrangement for detecting at least one body function of the person in operation and the likewise carried mobile communication unit sends monitoring information based on the detected body function to the control unit. An important advantage of such a system is that body function automatically, i. H. is detected without active and conscious control by the person in the labor input and the corresponding monitoring information can be transmitted wirelessly through the mobile communication unit to the control device. Thus, in contrast to the known radio system, the body function is monitored even when the person is concentrated in the work on their work. Furthermore, in contrast to the known deadman switch meaningful and, if desired, extensive information about the current body functions of the person reliably and completely transmitted by wireless communication to the control device, so that the control device has virtually immediate information about the relevant body functions of the person. Corresponding evaluation means and signaling means of the control device can then z. B. immediately evaluate the current state of health of the person concerned and / or display for an operation management. The system according to the invention can then enable, for example, a command line to monitor in real time the state of health of a person during work.

The mobile communication unit preferably comprises a data processing circuit and a transmission circuit. The data conditioning circuitry may include electronic circuitry configured to condition the wireless communication transmission monitoring parameters transmitted by the body function sensor assembly through the transmitting circuitry. Preferably, data conditioning circuit and transmitting circuit are housed in a common housing, for attachment to the person or their protective equipment.

Preferably, the mobile communication unit and the control device are adapted to transmit the monitoring information continuously or at predetermined times to the control device and to receive it in the control device. Thus, an ongoing monitoring of the health status of the person in the work and, in particular, an observation of a change in the state of health can be made possible. Transmission of the monitoring information at predetermined (especially equal) intervals is particularly preferred because it allows a reliable time base to be provided in view of changes in health and at the same time conserves transmission capacity over continuous transmission.

The continuous monitoring of the health status of the person made possible in the above-mentioned manner entails an additional important advantage, which further increases the safety of the person in the working environment in the occupational health and safety system. In fact, on-the-spot surveillance allows a much earlier detection of a potentially threatening deterioration in health for the individual by detecting trends so that, for example, the person concerned can be made aware of the threat immediately or other measures to rescue that individual can be initiated much earlier. Since every minute counts in the rescue of emergency personnel often, such an early detection of a deterioration of a health condition significantly contributes to increasing the safety of the persons concerned.

The control device is, for example, an operating center located at a distance from the person working, eg. B. a mobile operations center or a stationary operations center at a greater distance from the person and regardless of the location. In an advantageous variant of the invention, the occupational safety system comprises at least two control devices, wherein monitoring information of the person in the labor input is processed in both the first control device and the second control device. In particular, a first control device may be an application-specific control device, for example a control center, in which an application-specific evaluation of the monitoring information takes place, for example for the transmission of command information to the person or for influencing the labor input on the basis of the monitoring information. The second control device can be an operation-independent control device, which evaluates the monitoring information independently of the application, for example, primarily with regard to medical aspects. In such a system, the reliability of the detection of a health hazard of the person is increased and assistance or rescue measures can be coordinated earlier. In particular, an integrated emergency rescue center, which is also available to the general public, comes into consideration as an operation-independent control facility.

The first and the second control device can each by a Wireless communication means are in wireless communication connection with the mobile communication unit of the person in the work use, so that the monitoring information is sent directly from the person to both control devices. However, to simplify the technical means for wireless communication, for example, only the mission-specific control device could be in wireless communication connection with the person's mobile communication unit, with surveillance information being transmitted from the mission-specific control device to the non-mission control device upon receipt via a second communication link. The second communication connection could be a cellular connection, an internet connection, or another wireless or wired communication connection. It would also be conceivable to forward the monitoring information of the person from the use-specific control device to the non-operational control device only after an intermediate processing, for example, to supply the operation-independent control device only with medically particularly relevant data.

In a preferred embodiment of the invention it is provided that the body function sensor arrangement comprises a plurality of body function sensors for detecting different body functions, wherein the body function sensors are connected to the mobile communication unit for transmitting the respectively detected by the body function sensors monitoring quantities and wherein the mobile communication unit in the working use of the wireless communication means transmits a plurality of monitoring information corresponding to the detected monitoring quantities to the control device or transmits monitoring information based on a combination of at least two of the monitored variables of the individual body-function sensors to the control device. Through the simultaneous detection and monitoring of several body functions, the health status of the person in the labor input by the control device can be estimated much more reliable, a threatening deterioration of the health status can be detected faster and the frequency of a false alarm can be reduced. The combination of the signals of the individual body function sensors can be carried out in the body function sensor arrangement, in the mobile communication unit or only in the control device, in many cases the latter variant should be preferred to provide flexible ways of evaluating the data in the control device and at the same time the circuit complexity to keep low in the to be carried by the person in the work equipment.

In a further preferred embodiment of the invention, the control device comprises a signaling device and is configured to receive the monitoring information via the wireless communication medium and to control a signaling operation of the signaling device on the basis of the monitoring information. In this way, information about the state of health of the person in the labor input can be signaled by the signaling device and, for example, brought to the attention of a task force. This signaling can be done visually, acoustically or by issuing a corresponding message to a mission manager, a rescue coordination center, another deployment force in the vicinity of the person or the like. In particular, however, it is envisaged that the signaling device comprises a display device for displaying the monitoring information or information derived therefrom. So z. Display monitors display graphic, numerical or text-based correspondences of the monitoring information (eg a chronological progression curve of the measured pulse frequency of the person).

The processing in the control unit can be based on at least one individual parameter of the person to be monitored, which can be stored in an individual parameter memory device of the control unit and which represents a personal value of the person concerned. The individual parameter may be set, for example, based on a preliminary examination of the person based on known body data of the person based on disease data or the like. An individual parameter may be a value related to the normal concentration of red blood cells of the person, other normal values or individual limit values of the person (eg from preliminary examinations such as blood test, normal and / or stress ECG etc.), master data such as age, Body weight, height, and other data that could be used to monitor and evaluate the health of the person.

It is further contemplated that the control device comprises a threshold circuit having a memory device in which at least one vital threshold value related to a human body function, especially for the person concerned, is stored, and in that the control device is adapted to perform a control operation based on a comparison between the vital threshold and the acquired monitoring information or a value derived from the monitoring information. The proposed threshold circuit may be at least partially automatic Allow monitoring of the health status of the person or facilitate monitoring by an operator. For example, the vital threshold value can be related to a critical state of health of the person, so that upon reaching such a state of health, a predetermined signaling is forcibly carried out. Thus, by means of the threshold value circuit, an at least partially automated evaluation of the monitoring information can take place in order, for example, to make it easier for a task force to monitor their emergency services, to recognize emergency situations earlier and to compensate for possible human error.

If the control device also stores at least one individual parameter of the type described above, then the threshold circuit can take into account the at least one individual parameter in its comparison; in particular, at least one vital threshold value can itself be such a personal individual parameter.

• a) eine Pulserfassungsanordnung, welche eine Information über den Pulsschlag der Person als Überwachungsgröße erfasst,
• b) eine Körpertemperaturerfassungsanordnung umfasst, welche eine Information über die Körpertemperatur der Person als Überwachungsgröße erfasst,
• c) eine Atmungserfassungsanordnung, welche eine Information über die Atmung der Person als Überwachungsgröße erfasst,
• d) eine Blutsauerstofferfassungsanordnung, welche eine Information über die Sauerstoffsättigung des Blutes der Person als Überwachungsgröße erfasst,
• e) eine Blutdruckerfassungsanordnung, welche eine Information über den Blutdruck der Person als Überwachungsgröße erfasst,
• f) eine Elektrokardiografieanordnung, welche eine Information über eine Herzaktivität der Person, vorzugsweise einschließlich mindestens zweier EKG-Ableitungen, als Überwachungsgröße erfasst.

In the occupational health and safety system of the invention, the body function sensor arrangement may advantageously provide information about circulation and / or respiration and optionally about other bodily functions. In particular, the combination of circulatory and respiratory data is considered a reliable basis for monitoring and evaluation. In a preferred embodiment, the body function sensor arrangement comprises at least one of the following arrangements:

• a) a pulse detection arrangement which records information about the pulse beat of the person as a monitoring variable,
• b) comprises a body temperature detection arrangement which detects information about the body temperature of the person as a monitoring variable,
• c) a respiratory detection arrangement which records information about the respiration of the person as a monitoring quantity,
• d) a blood oxygen detection arrangement which detects information about the oxygen saturation of the person's blood as a monitoring quantity,
• e) a blood pressure detection arrangement, which records information about the blood pressure of the person as a monitoring variable,
• f) an electrocardiographic arrangement which records information about cardiac activity of the person, preferably including at least two ECG leads, as a monitoring quantity.

If at least two of said arrangements a) to f) are combined together to detect at least two different body functions in the body function sensor arrangement so that control in the control unit can be performed based on monitoring information from at least two body functions, then a much more reliable and meaningful one Received information about the state of health of the person at work. In particular, the information obtainable from the combination of the detected bodily functions (if appropriate, plus the information from at least one individual parameter) also exceeds the sum of the information contents of the individual monitoring information. Thus, for example, an increased pulse rate alone or a fairly low inspiratory low volume alone each indicate a person lying in the normal range vitality of the person in the work, with simultaneous detection of both body functions and combined evaluation already an impending oxygen deficiency of the person is recognizable. The combination of at least two simultaneously monitored body functions thus allows the earlier detection of threat situations for the person and the earlier initiation of appropriate countermeasures.

The said preferred body function sensor arrangements can each be realized as sensor-based sensor arrangements and monitor in each case a body function which provides meaningful information about the current state of health of the person during work.

An expert with special knowledge in the medical field can draw conclusions about a possible risk situation of the person from these body functions, in particular their temporal change. For example, an increase in pulse rate above a certain level indicates an exceptional stress situation that may require supportive measures or the transmission of special operational commands. Similarly, a health threat can be detected when falling below a critical pulse rate or irregular heart rate. Furthermore, a particular burden or disturbance of the circulatory system is often accompanied by a change in body temperature, which then assumes values outside a predetermined range.

According to a further embodiment of the invention, the body function sensor arrangement may comprise a non-invasive partial pressure sensor which detects a value related to the subcutaneous oxygen partial pressure and / or partial pressure of carbon dioxide as a monitoring quantity, so that changes in vital circulatory parameters during the labor input can be monitored. Decreases in particular the circulation performance of the emergency force as a result of dehydration or cardiac problems, the blood supply to the skin also decreases, which is reflected in a reduced partial pressure in the skin cells and in the subcutaneous tissue. The reduced circulation of the peripheral parts of the body serves as a protective function of the body, which primarily supplies vital organs (brain, lung, liver, kidneys, etc.) during life-threatening exertion. In order to be able to recognize signs of this life-sustaining centralization process of the body particularly early, and at the same time avoid false detection, the above-mentioned concepts can advantageously be combined with one another, when the body function sensor arrangement comprises a noninvasive partial pressure sensor for monitoring the partial pressure of oxygen, a non-invasive partial pressure sensor for monitoring the partial pressure of carbon dioxide and a pulse oximeter sensor for monitoring the oxygen saturation of the person's blood.

Although a per se known sensor element could be used for each of these three sensors in the context of the present invention, it is proposed in an advantageous development of the invention to provide a combination sensor element which can be handled as a single sensor element and attached to the body of the person, wherein the combination sensor element at least measures two of the aforementioned monitoring variables (corresponding to the oxygen partial pressure, the carbon dioxide partial pressure, or the oxygen saturation of the blood) and forwards them separately or as a combination monitoring signal to the mobile communication unit. If a temperature sensor is also integrated in such a combination sensor element, which provides a monitoring variable related to the body temperature, then the functionality of the combination sensor is further increased and a sensor element specially adapted for the special requirements in the monitoring of emergency forces is created.

The monitoring quantities provided by the various sensors of the body function sensor arrangement provide reliable data for the evaluation of the circulatory situation of the person in the labor input. Conceivable here is the analysis of the amplitude height variance of the pulse oxymetrically measured data (plethysmogram) or the signal strength of the pulse oxymetrically measured data or the evaluation of the Horovitz index (quotient of oxygen partial pressure and oxygen concentration of the inhaled air). The data can be continuously monitored in the control device with respect to the respective person in order to automatically be able to take appropriate measures in the event of a deviation from predetermined normal values (eg when exceeding or falling below predetermined threshold values) or when changing by a predetermined amount such as the output of an alarm signal to the operation line or the data transmission to a doctor.

In principle, the measured data also allow conclusions to be drawn on the cardiac output (in particular cardiac output) on the determination of the oxygen consumption in the tissue as an indication of the heartbeat volume, from which the cardiac output can be determined by multiplication by the pulse oxymetrically determinable heart rate. Of particular interest here is the change in the cardiac output or in a value corresponding to the cardiac output (eg a value obtained from a product of the pulse rate and an oxygen saturation or partial pressure) which occurs during the labor input.

It is also preferable for the occupational health and safety system to monitor the person's consciousness as another important vital function of the person in the work assignment. For this purpose, in principle, the monitoring of radiotelephone contact with the emergency personnel is suitable. Thus, the best verbal response of the task force can be evaluated and evaluated according to the Glasgow coma scale. Alternatively or additionally, the motor vitality of the emergency force can be monitored by a movement detection arrangement, which detects information about a physical movement of the person as a monitoring variable and in particular in the absence or significant impairment / slowing down the movement of the emergency force transmits a corresponding signal. In addition to the transmission of the signal, an acoustic or visual signal output can take place in parallel at the location of the deployment force, comparable to the function of a known "deadman switch".

The requirements for monitoring the physical functions of a person in the labor force are fundamentally different from the monitoring of patients, for example in a hospital. Thus, in a work protection system of the type according to the invention, it is of decisive importance to reliably and early detect a threatening impairment of the vital functions in the case of an emergency force which is in itself healthy and under physical exertion. At the same time, the body function sensor arrangement and the mobile communication unit are so compact and robust to design that they can be carried without major disability of the person during labor input and without major medical effort, especially non-invasive, can be attached to the body. In addition, the system should be inexpensive to provide universal for a larger number of emergency services.

The inherently conflicting criteria of these requirements are met particularly well by an embodiment of the occupational safety system in which the body function sensor arrangement comprises: a circulatory sensor arrangement with a non-invasive partial pressure sensor which detects a value related to a subcutaneous oxygen partial pressure and / or partial pressure of carbon dioxide as a monitored variable, and / or with a pulse oximeter sensor, which detects a value related to an oxygen saturation of the blood of the person as a monitoring quantity, and a movement detection arrangement, which detects information about a physical movement of the person as a monitoring quantity. Such a sensor combination is tailored to the above-mentioned special circumstances during a work assignment of a person and recorded with comparatively simple technical means reliably and early a threatening deterioration of the state of health of the emergency personnel.

A further technical feature of the occupational health and safety system according to the invention can lie in a further embodiment in that the communication unit, the control device and the body function sensor arrangement are set up for detecting a temporal change of the monitored variables. In contrast to clinical diagnostics, where the technological complexity and the precision of the sensors or the data evaluation is directed to the detection of absolute values and the precise detection of the absolute value (for example, the oxygen saturation, the partial pressures, the pulse, the body temperature, etc.) is necessary to compare these data with predetermined comparative data and universal normative data may be sufficient for the occupational safety system according to the invention detection and evaluation of differences and temporal change amounts, since it is important only to detect a dangerous deterioration of the vital functions of a particular person. In particular, therefore, technical effort for calibrating or normalizing the sensors or the mobile communication unit can be saved or / and less expensive sensors can be used.

For example, can be dispensed with the exact detection of the body core temperature of the person, as would be indispensable in clinical diagnostics, and instead only a change in the measured, for example, the skin and thus not the exact body temperature core skin temperature are monitored, for example, with a cost , integrated PT100 sensor. Similarly, a breathing gas arrangement which supplies inhalation gas to the person during work and discharges exhaled gas from the person may be equipped with a technically relatively simple flow meter which is in principle unsuitable for clinical diagnostics and designed for gas consumption detection, and information about respiration The person working in the work can be obtained solely from a temporal change in the measured flow of inhaled or exhaled gas.

The respiratory sensing assembly may acquire information about respiratory rate, inspiratory low volume, per-unit breathing gas consumption, or expiratory gas composition, which may also be indicators of the person's state of health. As an important example of the detection of the exhaled gas composition, the monitoring of the CO ₂ content in the exhaled air should be mentioned, which provides information about the lung function of the person. It is also contemplated to monitor the oxygen saturation of the subject's blood and / or blood pressure, providing alone or in combination with other monitored bodily functions meaningful information about the person's oxygenation and function of the person's circulation and respiration.

In a particularly preferred embodiment of the invention, it is provided that the occupational safety system further comprises a breathing gas arrangement which provides the person with working gas inhalation gas or exhaled from the person that the Körperfunktionssensoranordnung comprises a respiration detection arrangement which detects information about the respiration of the person as a monitoring variable and in that the respiration detection arrangement comprises a respiration sensor for detecting the monitoring quantity, wherein the monitoring quantity is related to at least one of the following body functions: respiratory rate, inspiratory low volume, respiratory gas consumption per unit time, and exhaled gas composition. The respiratory gas arrangement may comprise a respiratory gas reservoir to be carried along by the person in the work or may comprise a respiratory gas source arranged at a distance from the person to which the person is connected via a respiratory gas line. In both cases, the person may be provided with the respiratory gas, for example via a breathing mask, as is known per se in the prior art.

In the described embodiment of the invention, the equipment of the respiratory gas arrangement which is to be provided anyway for the supply of respiratory air can at least partly also be used for respiration monitoring by the detection process of the respiration detection arrangement for detecting respiratory frequency, respiratory depression volume, respiratory gas consumption per unit time and / or exhaled gas composition structurally simple integration of the inventive concept is made possible.

The respiration sensor may be a pressure sensor in a particularly simple variant. Above all, information about the respiratory rate and / or the inhalation deep volume and / or the respiratory gas consumption per unit time can be easily detected from the detected pressure and in particular a time profile of the pressure. Furthermore, such a pressure sensor could have a dual function of monitoring the proper functioning of the respiratory gas arrangement on the one hand and detecting the monitoring variable for monitoring respiration on the other hand.

As an alternative or in addition to the pressure sensor, the respiration detection arrangement can comprise a flow rate measuring sensor with which the flow rate of respiratory gas can be detected by a respiratory gas line of the respiratory gas arrangement, in particular by a line leading to a respiratory mask and which can provide a monitoring quantity that is related to the respiration rate Inhalation depth or breathing gas consumption per unit time.

Reliable information about the person's current state of health can be provided by simple means if the controller is adapted to perform a control operation based on a respiratory rate-related product and an inspiratory-depth-related monitoring quantity, or based on a product corresponding to that product Respiratory gas consumption variable (eg breathing gas consumption per unit of time).

It has already been mentioned that the respiratory gas arrangement can comprise a respiratory gas reservoir to be carried along by the person working. In such an embodiment of the invention, furthermore, the respiratory sensor may preferably detect during operation a monitoring quantity indicating a residual amount of respiratory gas in the respiratory gas reservoir. On the one hand, information about the remaining time until the necessary renewal of the respiratory gas reservoir can be determined from the detected value of the residual amount of respiratory gas and, on the other hand, from the detected value of the residual quantity with respect to a time variable (eg from the time course of the residual amount or the number of breaths) information about the inhalation depth or the consumption of respiratory gas per unit time can be obtained. As an alternative or in addition to the detection of the residual amount of respiratory gas, the consumption of respiratory gas from the respiratory gas reservoir could also be detected. In combination with a predetermined value of the total capacity of the respiratory gas reservoir, the consumption with respect to a unit of time (eg from the time course of consumption) can then also include an indication of the remaining time until the renewal of the respiratory gas reservoir as well as monitoring information Regarding the inspiration depth of the person to be gained. The described variants of the occupational safety system with respiratory gas reservoir thus allow an efficient integration of the inventive concept by partial double use of equipment and / or measured variables.

The beneficial effects of the occupational health and safety system according to the invention are particularly evident when the protective equipment comprises protective clothing, so that parts of the mobile communication unit and / or the body function sensor arrangement and / or the wireless communication means can be fixed to or under the protective clothing. In particular, the use of protective suits and / or protective helmets and / or protective masks is intended. Alternatively, at least parts of the body function sensor assembly can also be attached directly to the person's body, e.g. B. on the skin of the person (adhesive electrodes).

In a further preferred embodiment of the invention, the occupational safety system further comprises an environmental sensor arrangement which is to be carried by the person in the work and detects at least one environment related to a hazard environment of the person, wherein the environment sensor arrangement communicates with the mobile communication unit, and wherein the mobile Communication unit in the work using the wireless communication means transmits environmental information or the monitoring information based on the at least one environmental quantity to the control device. For example, an ambient temperature, an ambient pressure, the concentration of predetermined substances in the form of gases, dusts or mists in the environment or the action of predetermined radiation come into consideration as detectable environmental variables. In particular, for occupational safety systems in the field of fire protection and Cathastrophendienst a monitoring of CO (carbon monoxide) as environment size may be of particular importance, for example, to indicate a risk from a leak in a protective suit.

If an environmental information obtained from such an environmental quantity is combined in the control device with the at least one monitoring information about at least one body function of the person, then a dangerous situation or emergency situation of the person can be better estimated and a detected state of health can be determined with regard to the detected Environment information can be classified more precisely. Thus, an increased ambient temperature is not in itself threatening in many cases. However, it leads to a significantly increased heart rate or body temperature, eg. B. due to a damaged heat insulation of a protective suit, this may be an indication of a harmful exposure of the body of the person in the work.

The invention will be explained in more detail below with reference to preferred embodiments with reference to the accompanying drawings. Show it:

1 an industrial safety system according to an embodiment of the invention in a schematic representation,

2 an example of a graphical representation and evaluation of monitoring information,

3 another example of a graphical representation and evaluation of a monitoring information,

4 a variation of in 1 - 3 illustrated embodiment, and

5 another variation of in 1 - 3 illustrated embodiment.

An in 1 generally with 10 designated occupational safety system comprises one of an in-work deployment force 12 Protective equipment worn during work 14 , a mobile data preparation and transmission unit 16 and a body function sensor arrangement 18 , wherein the data preparation and transmission unit 16 and the body function sensor assembly 18 also be carried by the person in the work. In particular, a work on land or under water comes into consideration as a labor input. The person 12 may be, for example, a firefighter and the protective equipment to be described later 14 Accordingly, it may be a designed for firefighters firefighter protective clothing.

To the occupational safety system 10 The embodiment further includes one at a distance from the person 12 , For example, outside the immediate danger area (eg at a distance of several meters, in particular more than 20 m), arranged control device 20 which can be accommodated, for example, in a mobile operations center in a deployed car positioned near the place of deployment but also in a stationary operations center.

The protective clothing 14 can be a breathing gas arrangement 22 include, with one on the back of the person 12 carried compressed air cylinder 24 in which inhaled air is stored under pressure, a respirator 26 , which carries the person over mouth and nose, as well as a breathing air line 28 which the respirator 26 with the compressed air bottle 24 combines.

Furthermore, the protective equipment 14 a protective clothing 30 belong, which is adapted for the purpose of use. The protective clothing 30 can, for example, a fire-fighter suit or / and a protective helmet 32 be. The respirator 26 may be equipped with a breathing gas supply hose for the supply of inhaled air and with spring-loaded gas outlet valves for the discharge of exhaled air.

The body function sensor arrangement 18 can be a pulse sensor 34 exhibit. In the exemplary embodiment, this is designed as an ear clip and can thus be quickly and easily clipped on the earlobe of the person. Here a known product can be used. In a preferred variant, the pulse sensor 34 a pulse oximeter, which in addition to the pulse of the person 12 can also detect an oxygen saturation of the blood. Via a signal line 36a can the pulse sensor 34 with the mobile data preparation and transmission unit 16 be connected to the on the pulse (pulse rate) and / or the oxygen saturation of the blood related monitoring quantities from the pulse sensor 34 to the data preparation and transmission unit 16 to convey.

The body function sensor arrangement 18 may further include a temperature sensor 38 include. For example, one may be on the person's skin 12 Adhesive measuring electrode (eg platinum electrode, in particular based on a PT100). The temperature sensor 38 may preferably be attached in the vicinity of a large vessel (for example on the carotid artery) and detects there, for example by means of a resistance measurement, a body temperature-related monitoring variable which is transmitted via a signal line 36b to the data preparation and transmission unit 16 is handed over.

In a particularly preferred variant of the invention, both a temperature sensor and a pulse sensor (in particular also a pulse oximeter for detecting both the pulse frequency and the oxygen saturation of the blood) can be integrated in a single sensor module, for example in a single ear clip, so that the person 12 To prepare for their work, only a single sensor assembly must attach to the body while monitoring two or even three different body functions is possible. In particular, such a sensor module can also be used with only one signal line with the data preparation and transmission unit 16 be connected to further simplify the system.

The body function sensor arrangement 18 may also include a breathing sensor, preferably in the form of a pressure sensor 40 , include. The pressure sensor used in the embodiment 40 can be advantageous in the vicinity of a shut-off and Reduzierventils 44 the compressed air bottle 24 be arranged. In particular, the interposition of the pressure sensor is possible 40 between a connection thread 42 the compressed air bottle 24 and one downstream of the compressed air cylinder 24 arranged shut-off and reducing valve 44 , In the example of 1 becomes a T-pipe element 46 used, which is the shut-off and reducing valve 44 with the connection thread 42 the compressed gas cylinder 24 connects and at the T-junction of the pressure sensor 40 is arranged so that the pressure sensor 40 in the compressed gas cylinder 24 prevailing pressure as a monitoring measure. Alternatively, however, a pressure sensor could be located elsewhere between, including the shut-off and the reducing valve 44 and including the respirator 26 be arranged to monitor a breathing air pressure.

As a pressure sensor 40 is a known gas pressure transmitter, for example, for a pressure range of 0 to about 400 bar, into consideration. Examples of suitable pressure transmitters include mechanical and / or capacitive-ceramic sensors, which convert the detected pressure values into electrical signals.

The through the pressure sensor 40 detected monitoring variable is as an electrical signal via a signal line 36c to the data preparation and transmission unit 16 transmitted.

The data preparation and transmission unit 16 includes a housing 47 which, for example, by means of a suitable retaining clips or the like to the protective equipment 14 is fixable, so the person 12 the data preparation and transmission unit 16 captive while working. Alternatively, the housing 47 in a suitable bag of the suit 30 be housed or otherwise protected 14 to be appropriate.

In the case 47 the data preparation and transmission unit 16 can be a data preparation circuit 48 and a transmission circuit 49 be housed. The data preparation circuit 48 is adapted to that of the body function sensor arrangement 18 over the signal lines 36a . 36b and 36c receive transmitted monitoring variables and for the wireless transmission by the transmission circuit 49 prepare. This can be done by the data preparation circuit 48 For example, comprise a digitizing circuit, which analog signals of the body function sensor arrangement 18 digitized and converted into a format suitable for wireless transmission. The data can be in the data preparation circuit 48 z. B. are formatted into transmission packets, each containing parts or the complete monitoring information and at predetermined intervals from the transmission circuit 49 be sent. In consideration comes z. B. a transmission in about 50 to about 60 transmission pulses per minute, so that the data preparation and transmission unit 16 continuously (quasi-continuously) at predetermined intervals, the monitoring information to the control device 20 transfers. The wireless transmission can use a per se known radio system, for. B. based on digital mobile technology.

In the transmission circuit 49 For example, data modulation may take place in which the digital data packets are bundled and modulated to an assigned carrier frequency of the wireless communication. Furthermore, the transmission circuit 49 suitable, known per se, wireless transmission means, in particular a suitable transmitting antenna include. In the case 47 the data preparation and transmission unit 16 In addition, a power supply, for. As a rechargeable battery, be arranged to the data preparation circuit 48 and the transmission circuit 49 to provide energy.

The control device 20 can be a receiver 50 comprising the wireless data processing and transmission unit 16 receives transmitted signals and demodulates the digital data from the signals based on the transmission / reception frequency. The demodulation as well as the subsequent extraction of the monitoring information from the received packets can be done on the basis of a predetermined transmission protocol for which both the data preparation and transmission unit 16 as well as the receiver 50 are set up.

The recipient 50 may be at the site of the inspection facility 20 be provided, for example, at a mobile operations center. To improve the transmission security of the wireless connection and to increase the signal strength or in places with difficult wireless conditions, eg. As in a reinforced concrete or the like highly shielded housing to allow wireless communication at all, but the receiver 50 also be located closer to the place of use, or in a more radioically advantageous position to the place of use, and by an additional wired connection from the data processing and transmission unit 16 wirelessly received data to the other components of the control device 20 transfer. To improve the signal strength, one or more repeaters can also be used, which signals on their way from the Datenaufbeiitsungs- and sending unit 16 to the recipient 50 the control device 20 receive, amplify and send out in reinforced form again.

The one from the receiver 50 data packets extracted from the received signals concerning the monitoring information of the body function sensor arrangement 18 (Thus, for example, the data which the monitoring parameters of the pulse sensor 34 and / or the temperature sensor 38 and / or the pressure sensor 40 are included) by the recipient 50 to a monitoring and evaluation unit 52 which is also part of the inspection facility 20 is. In the monitoring and evaluation unit 52 the monitoring information is evaluated in terms of content or / and prepared for signaling.

The monitoring and evaluation unit 52 may be a plurality of processing sections 52a . 52b . 52c . 52d . 52e include, which are each set up for the monitoring and evaluation of various monitoring information related to different body function. In particular, the monitoring and evaluation of respiration and circulation of the person from a medical-technical point of view can be made comparable to the monitoring of a patient by an anesthetist during an operation.

In the embodiment, a first processing section 52a provided for conditioning the pulse information and can be a graphical representation of the pulse, z. B. the pulse rate, generate against a time axis and provide graphically representable digital data. Similarly, in a second processing section 52b from the on the body temperature of the person 12 related monitoring information is generated a graphical representation for later graphical representation.

A third processing section 52c in the monitoring and evaluation unit 52 The treatment may be based on the breathing of the person 12 serve related monitoring information. Thus, there can be the continuous or at predetermined intervals or at predetermined times received data on the breathing of the person 12 based on a time base are evaluated and graphically representable records can be generated. Preferably, the third processing section calculates 52c the remaining time over which the respiratory gas reservoir the person 12 can still provide sufficient breathing gas, that is z. B. the residual amount of respiratory gas. If such residual time or residual amount information is derived from a measured consumption of respiratory gas, then the third processing section 52c to a predetermined value for a starting amount of breathing gas in the compressed air cylinder 24 and optionally a temperature of the breathing gas in the compressed air cylinder 24 use.

2 shows an example of one in the third processing section 52c generated a graphic representation of the pressure sensor 40 detected pressure inside the compressed air cylinder 24 as an example of a graphical representation of a person's breathing 12 related monitoring information. The graphic representation of the 2 represents the course of the bottle internal pressure p with respect to the time t.

In case of constant breathing of the person 12 , ie with uniform respiratory depression volume and constant respiratory rate, the internal pressure of the bottle p decreases evenly in steps, the pressure difference Δp at each step being a measure of the inhalation depth of the respective breath and the time difference Δt between two steps is a measure of the respiratory rate.

One according to 2 recorded curve can easily (as indicated by dashed line in 2 shown) are extrapolated to a predicted pressure trace A to compute when the in-bottle pressure p reaches a critical lower limit p ₀ (eg, the external ambient pressure) and thus a supply to the person 12 with breathing air is no longer possible. Is z. B. a time of start of the recording, for example, a time of the start of use, denoted by t ₀ and a current time at which the graphical representation according to 2 is provided, designated t ₁ , it can be concluded from the pressure drop from t ₀ to t ₁ to a time t ₂ at which at constant Einatemtiefevolumen (corresponding to Δp) and respiratory rate f = 1 / At the breathing gas supply comes to a standstill. t ₂ -t ₁ indicates a remaining time duration t _R , that of the person 12 remains in the work assignment.

Preferably, an evaluation of such 2 updated at regular intervals (from about once per minute to about one to two times per second), wherein also the above-described determination of the remaining time t _{r can} then take place on the basis of any changed data to Einatemtiefevolumen (corresponding to Δp) or to the respiratory rate .DELTA.t. Thus, even if the person's breathing behavior changes, an ongoing correction to the prognosis of the remaining time can be made.

3 shows another example of one of the monitoring and evaluation unit 52 generated graph, which in particular also by the third processing section 52c could be detected. 3 is also based on a continuous monitoring of the bottle internal pressure p, but it applies a breathing air consumption value K over the time t. For example, the breathing air consumption value K may be calculated by the following equation: K = c · Δp / Δt = c · Δp · f, (Equation 1) where c is a constant, Δp is the pressure drop already introduced above for a current breath, Δt is the time difference between the previous breath and the current breath, and f is the instantaneous respiratory rate derived from Δt. The breathing air consumption value K indicates a consumption of breathing air per unit of time and corresponds to one of the person 12 recorded mass flow (dm / dt) of respiratory gas.

In the case of normal breathing, which indicates a normal state of health of the person 12 indicates the breathing air consumption value K at a constant normal value K _N , as in 3 is shown in the period from t ₀ to t _a . In the case of an emergency situation, the breathing air consumption value K may decrease or increase, as in 3 between the times t _a and t _{b is} illustrated (in 3 K decreases between t _a and t _b ). According to Equation 1, the cause for a decrease in the breathing air consumption value K may be a reduced respiratory rate f or / and a reduced inspiratory deep volume (corresponding to Δp). Such a respiratory problem can be seen in a representation according to 3 be well recognized and especially evaluated automatically, as will be explained later.

The monitoring and evaluation unit 52 may further comprise a threshold circuit. This can be a separate, fourth processing section 52d with at least one of the processing sections 52a . 52b and 52c work together. Alternatively, a threshold circuit may be provided in at least one of the processing sections 52a . 52b . 52c be integrated.

A threshold value circuit of the monitoring and evaluation unit 52 has a storage means for storing at least one vital threshold value. For any body function can be in the threshold circuit 52d at least one associated Vitalschwellwert be stored. The vital threshold values are preferably at least related to circulation and / or respiration and take into account individual, personal data of the relevant person to be monitored, so that different individual vital threshold values can be assigned to different persons.

For the monitoring and evaluation of the monitoring information on the basis of the at least one vital threshold, at least the following possibilities are conceivable, which are not exhaustively enumerated and can be realized either individually or in any combination with one another.

The monitoring and evaluation unit 52 can store at least one pulse rate threshold, e.g. B. a minimum threshold and a maximum threshold, so that a critical health of the person 12 can be detected when exceeding a maximum pulse rate and / or falls below a minimum pulse rate. The monitoring and evaluation unit 52 may store at least one body temperature threshold, for example, a minimum value and a maximum value, so that an emergency situation may be detected when a monitor temperature related to the body temperature is above the maximum value and / or below the minimum value.

The monitoring and evaluation unit 52 may store at least one threshold related to the blood oxygen content, for example a minimum value and a maximum value, so that an emergency situation can be detected if a monitoring value related to the blood oxygen content exceeds the maximum value and / or the minimum value is undershot.

The monitoring and evaluation unit 52 may store at least one respiratory threshold, such as minimum values and / or maximum values with respect to at least one of inspiratory low volumes (corresponding to Δp), respiratory rate, respiratory air consumption per unit time (corresponding to, for example, breath air consumption value K). A health-threatening emergency situation can then be detected if the monitoring value relating to the respiration exceeds the at least one maximum value and / or falls below the at least one minimum value.

Preferably, in the monitoring and evaluation unit 52 stored at least one individual parameter, which is set on the basis of a preliminary examination of the person, based on known body data of the person on the basis of disease data or the like. The monitoring and evaluation unit 52 then performs the monitoring and evaluation taking into account the at least one individual parameter. In particular, the above-mentioned vital threshold values can themselves represent such individual parameters, that is to say the vital threshold values are personal thresholds or individual thresholds.

If several emergency services are monitored and evaluated in parallel in the monitoring and evaluation unit, then a separate processing section, in particular with at least one processing section of the aforementioned type, can be provided in the monitoring and evaluation unit for each deployment force, monitoring information only being available in this processing section assigned mission force is processed to ensure the parallel monitoring reliable.

The monitoring and evaluation unit 52 can be configured to prepare the at least one vital threshold or / and at least one individual parameter for graphical display. In 3 For example, a horizontal dashed line representing a threshold value K _L for the breathing air consumption value K is shown. Furthermore, the monitoring and evaluation unit 52 a special warning mark B ( 3 ) in the graphic dataset to be displayed, which further emphasizes the falling below the threshold value K _L. The monitoring and evaluation unit 52 Moreover, based on the comparison of the monitoring information with the at least one vital threshold value, it would be possible to generate further data for the execution of further signaling, for example for the output of an acoustic warning signal, for the deposition of a wireless or wired message or the like.

The at least one vital threshold value can be entered into the monitoring and evaluation unit by known input / output means 52 getting charged. In the illustrated embodiment is an input device 54 (eg a keyboard) to the monitoring and evaluation unit 52 connected, via which a legitimate person (eg, a trained doctor or an adequately trained, authorized person) can enter or change the at least one vital threshold. It is thought of tampering by means of digital security techniques (eg access codes).

The of the monitoring and evaluation unit 52 generated graphic records are sent to a signaling unit 56 which performs the graphic signaling according to the data records. The signaling unit 56 can have at least one display monitor 56a . 56b . 56c include. Are several signaling subunits provided, z. B. several display monitors 56a . 56b . 56c So it is beneficial if any in use and with the work protection system 10 Working force cooperating with the exemplary embodiment 12 a separate signaling subunit 56a . 56b . 56c assigned. The signaling subunits 56a . 56b . 56c Alternatively, they could also be implemented as separate windows or screen sections of a single display monitor, so that multiple emergency services 12 can be visually monitored on a display monitor.

The monitoring and evaluation unit 52 may further include a service section 52e include the monitoring and evaluation unit 52 supplied with operating voltage and provides infrastructure for data input and output.

Hereinafter, an embodiment of the work protection method according to the invention using the work protection system described above 10 explained in more detail.

At the beginning of a mission, the at least one task force 12 the protective equipment 14 What can happen, for example, after receiving an emergency call in a control center or on the way to the place of use, for example in the fire truck. For example, the person may use a pulse sensor designed as an ear clip 34 Clip on or / and designed as an adhesive electrode temperature sensor 38 attach or / and the compressed air cylinder 24 with the pressure sensor 40 strap on your back. Further, the person can 12 a protective suit 30 put on a helmet 32 put on and / or a respirator 26 invest.

In the work, the thus equipped emergency staff performs 12 then their assigned work on land or under water, for example to combat a fire, to rescue people or the like.

During work, the pulse sensor can 34 an electrical pulse signal via the signal line 36a to the data preparation and transmission unit 16 transferred, the temperature sensor 38 can be an electrical temperature signal through the signal line 36b to the data preparation and transmission unit 16 transmit and the pressure sensor 40 can be an electrical pressure signal via the signal line 36c to the data preparation and transmission unit 16 transfer. At the same time, the deployment force 12 via the breathing air line 28 and the respirator 26 with inhaled air from the compressed air cylinder 24 be supplied.

The electrical signals of the body function sensor arrangement 18 be over the signal lines 36a . 36b . 36c preferably as continuous, in particular analog continuous signals to the data preparation and transmission unit 16 directed. The data preparation and transmission unit 16 can digitize these signals and process them for wirelessly transferable data packets. These data packets can then from the data preparation and transmission unit 16 at regular intervals (transmit pulses) wirelessly to the receiver 50 the control device 20 be sent. A resource-conserving and at the same time reliable (quasi-continuous) transmission can, for. B. send about 50 to about 60 transmission pulses per minute.

The wireless data transfer between data preparation and transmission unit 16 and control device 20 may be based on transmission protocols known per se in the art. Preferably, a protected transmission of the data is used, in which the data is transmitted encrypted, for example, using a 128-bit encryption technique. Encrypted data can be transmitted as packets modulated at regular intervals of about 8 to 10 packets per minute. Furthermore, by means of an individual coding of the data to be transmitted by means of a person-specific key, a particularly flexible control of the access rights to the monitoring information of the individual persons takes place, so that the data security can be increased.

The data processing and transmission unit 16 sent data packets are in the receiver 50 the control device 20 received, demodulated and the monitoring and evaluation unit 52 passed as digital data. In the manner described in more detail above, these data are stored in the monitoring and evaluation unit 52 prepared for graphical representation, optionally compared with at least one Vitalschwellwert and the signaling unit 56 to hand over.

In an operational situation called normal, they are in the monitoring and evaluation unit 52 processed monitoring values within predetermined, determined by the at least one vital threshold value ranges or a combination of multiple monitoring values predetermined, determined by the at least one vital threshold conditions. The signaling unit 56 then indicates a corresponding signaling of the normal state or displays the representations representing the monitoring values, from which a medically trained operator of the control device 20 a normal condition of the task force 12 can recognize.

From the recorded monitoring values and in particular from a combination of different monitoring values, the information about various current body functions of the emergency personnel 12 can provide a medically trained operator or the monitoring and evaluation unit programmed by a medically trained person 52 a reliable statement about the current state of health of the task force 12 derive indications of a reduction in performance or an imminent threat to the health of the rescue team at an early stage 12 detect.

A deployment force monitoring achievable in this manner may be comparable to monitoring a patient, for example, during an operation in which an anesthesiologist may derive reliable information about the patient's current state of health based on, for example, classical anesthesia monitoring data such as respiration, circulation, and body temperature.

The operator of the control device 20 or the monitoring and evaluation unit 52 can in the work protection system 10 of the embodiment, a deterioration of the state of health very early and in particular in many cases already at a time recognize when the emergency response 12 even the deterioration of health status and the imminent emergency situation does not even recognize, for example, because the task force either does not even feel the deterioration of the state of health itself or because the task force is too distracted by their work or under too much stress, the deterioration of the state of health. It is also possible that the task force notices the worsening of the state of health, but is unwilling or unable to adequately respond to the deterioration of the state of health due to special circumstances. For all these cases offers the work protection system 10 and the protective method of the embodiment described the possibility of adequate measures to support the emergency services or to rescue the emergency services 12 to initiate at an early stage.

The invention is not limited to the embodiment of the occupational safety system described above 10 or the embodiment of the occupational safety procedure is limited and includes within the scope of the appended claims a plurality of further variants.

Thus, the body function sensor arrangement 18 Furthermore, the blood pressure of the emergency force 12 capture relevant monitoring size and derived monitoring information can in the monitoring and evaluation unit 52 are processed. Such a blood pressure sensor may be of conventional construction known in the art.

Furthermore, the body function sensor arrangement 18 a sensor for detecting a monitoring quantity concerning the composition, in particular, the oxygen content, the exhaled air include and the composition of the exhaled air monitoring information can in the monitoring and evaluation unit 52 are processed. Such an exhaled air sensor can detect a CO ₂ content of the exhaled air or a detection variable representing it, and corresponding monitoring information can be stored in the monitoring and evaluation unit 52 are processed. From the composition of the exhaled air can be a medically trained operator of the control device 20 or the appropriately programmed monitoring and evaluation unit 52 Conclusions about the oxygen intake of the emergency services 12 and detect a possible oxygen deficiency or other respiratory or circulatory problem.

Furthermore, the body function sensor arrangement can record an ECG, in particular with at least two leads, as a monitoring variable, and monitoring information concerning the heart activity, in particular the recorded ECG, can be stored in the monitoring and evaluation unit 52 are processed. A comparison of the ECG with a reference ECG, in particular a previously recorded reference ECG of the same person, made by automatic or by a medically trained operator, can then be concluded to indicate a changed and possibly dangerously deteriorated state of health.

In a further variant of the above-described embodiment, the work protection system 10 also an environment sensor 58 include, also by the person 12 is carried in the work. This may be an ambient pressure sensor, an ambient temperature sensor, a gas sensor (in particular a carbon monoxide sensor or another harmful gas sensor) or a radiation sensor. The environmental sensor 58 is then through a signal line 36d with the data preparation circuit 48 the data preparation and transmission unit 16 connected and the data preparation and transmission unit 16 sends environmental monitoring information to the receiver 50 the control device 20 , The environmental monitoring information may be separate to the monitoring information of the body function sensor arrangement 18 or the transmitted data packets may be a combination of the monitoring information of the body function sensor arrangement 18 and the environmental monitoring information of the environmental sensor 58 contain.

In the variant described above, another processing section 52f in the monitoring and evaluation unit 52 be provided for monitoring and evaluation of the environmental information, in particular, the evaluation and monitoring of the monitoring information of the body function sensor arrangement 18 taking into account the environmental monitoring information, for example a change in the state of health of the emergency personnel 12 taking into account the particular environmental situation, indicated by the environmental monitoring information to better classify.

In an in 4 shown, another variant of the embodiment of the invention includes the occupational safety system 10 in addition a rescue center 60 for example, a publicly available, e.g. B. government or municipal operated emergency coordination center for the coordination of emergencies. In the variant according to 4 can the data preparation and sending unit 16 in wireless communication connection 62 with the rescue center 60 stand and can parallel to it in wireless communication connection 64 with the control device 20 stand. Furthermore, a wireless or wired communication connection 66 between the control device 20 and the rescue center 60 be furnished. Alternatively, it could be on the communication link 62 between data preparation and transmission unit 16 and rescue center 60 be omitted, with monitoring information about the person 12 from the control facility 20 over the communication connection 66 to the rescue center 60 can be transferred. In addition, an in 4 not shown radio communication between the force 12 and the control device 20 and / or the rescue center 60 be provided.

With the occupational safety system according to 4 an efficient and safer work assignment can be carried out by being in the control facility 20 a task-specific person coordinates the work assignment itself, while a medically trained person, in particular a doctor, in the rescue center 60 at the same time, especially in real time, medical monitoring of the person 12 can take and warnings or appropriate action in the interest of the health of the person 12 can initiate in time. The OSH system works cost-effectively and reliably in this way.

In an in 5 shown, another variant of the embodiment of the invention includes the occupational safety system 10 a combination sensor 68 which is attachable to the skin of the person and provides information about the circulatory state of the person. The combination sensor 68 may simultaneously detect at least two of the following monitoring parameters: a subcutaneous oxygen partial pressure, a subcutaneous carbon dioxide partial pressure, and an oxygen saturation of the person's blood. Preferably, in the combination sensor element 68 a pulse oximeter sensor and a partial pressure sensor integrated. Via a signal line 36f The at least two monitoring quantities or a combination monitoring variable formed therefrom are sent to the data preparation and transmission unit 16 transmitted.

Furthermore, in the in 5 variant shown a motion sensor 70 provided, which detects a movement of the person and a derived therefrom monitoring size via a signal line 36g to the data preparation and transmission unit 16 transmitted. The motion sensor 70 Can on a support structure 72 the compressed gas cylinder 24 or alternatively on the housing 47 the data preparation and transmission unit 16 be arranged.

The body function monitoring can be found in the in 5 shown embodiment may be supplemented by a body temperature monitoring and / or by an environmental parameter monitoring and / or by a respiration monitoring, in particular a temperature sensor also in the combination sensor element 68 may be integrated to monitor a change in temperature of the corresponding skin portion of the person in the course of labor input can.

Regarding the further in 5 illustrated components of the occupational safety system 10 is expressly made to the detailed description of the embodiment with reference to 1 to 3 pointed. Furthermore, in the variant according to 5 described features with the variant according to 4 combined to that of the combination sensor element 68 and the motion sensor 70 also recorded to a rescue center 60 to convey.

Claims (14)

Occupational safety system ( 10 ), comprising - protective equipment ( 14 ) for a person ( 12 ) at work, - a mobile communication unit ( 16 ), which of the person ( 12 ) is to be carried in the work, - a control device ( 20 ), which are in use at a distance from the mobile communication unit ( 16 ), and wireless communication means ( 49 . 50 ) for establishing a wireless communication link between the control device ( 20 ) and the mobile communication unit ( 16 ), characterized by a body function sensor arrangement ( 18 ), which of the person ( 12 ) is to be carried in the labor input and which at least one on a body function of the person ( 12 ), wherein the body function sensor arrangement ( 18 ) with the mobile communication unit ( 16 ), and wherein the mobile communication unit ( 16 ) in the work using the wireless communication medium ( 49 . 50 ) a monitoring information based on the at least one monitoring quantity to the control device ( 20 ) transmits. Occupational safety system ( 10 ) according to claim 1, characterized in that the mobile communication unit ( 16 ) and the control device ( 20 ) are arranged to transmit the monitoring information to the control device continuously or at predetermined times, in particular at predetermined time intervals ( 20 ) and in the control 20 ) to recieve. Occupational safety system according to claim 1 or claim 2, characterized in that the body function sensor arrangement ( 20 ) a plurality of body function sensors ( 34 . 38 . 40 ) for detecting different body functions, wherein the body function sensors ( 34 . 38 . 40 ) with the mobile communication unit ( 16 ) are connected to the transmission of each detected by the body function sensors monitoring parameters and wherein the mobile communication unit ( 16 ) in the work using the wireless communication means a plurality of monitoring information corresponding to the detected monitoring quantities to the control device ( 20 ) transmits or monitoring information based on a combination of at least two of the monitoring variables of the individual body function sensors ( 34 . 38 . 40 ) to the control body ( 20 ) transmits. Occupational safety system ( 10 ) according to one of the preceding claims, characterized in that the control device ( 20 ) a signaling device ( 56 ) and that the control facility ( 20 ) is arranged to transmit the monitoring information via the wireless communication medium ( 49 . 50 ) and a signaling operation of the signaling device ( 56 ) based on the monitoring information. Occupational safety system ( 10 ) according to claim 4, characterized in that the signaling device ( 56 ) a display device ( 56a . 56b . 56c ) for displaying the monitoring information or information derived therefrom. Occupational safety system ( 10 ) according to one of the preceding claims, characterized in that the control device ( 20 ) a threshold circuit ( 52d ) comprising a memory device in which at least one vital threshold value based on a human body function is stored, and in that the control device ( 20 ) is adapted to perform a control operation based on a comparison between the vital threshold and the acquired monitoring information or a value derived from the monitoring information. Occupational safety system ( 10 ) according to one of the preceding claims, characterized in that the body function sensor arrangement ( 18 ) comprises at least one of the following arrangements: a) a pulse detection arrangement ( 34 ), which collects information about the pulse rate of the person as a monitored variable, b) a body temperature detection device ( 38 ), which collects information about the body temperature of the person as a monitoring quantity, c) a respiration detection arrangement (FIG. 40 ), which collects information about the respiration of the person as a monitoring variable, d) a blood oxygen detection device ( 34 e) a blood pressure detection arrangement, which detects information about the person's blood pressure as a monitored variable, f) an electrocardiographic device, which contains information about a heart activity of the person, preferably including at least two ECG leads, recorded as a monitoring variable. Occupational safety system ( 10 ) according to one of the preceding claims, characterized in that the body function sensor arrangement ( 18 ) comprises a non-invasive partial pressure sensor that detects a value related to a subcutaneous oxygen partial pressure and / or a partial pressure of carbon dioxide as a monitoring quantity. Occupational safety system ( 10 ) according to one of the preceding claims, characterized in that the body function sensor arrangement ( 18 ) comprises: a circulation sensor arrangement ( 34 ) with a non-invasive partial pressure sensor which detects a value related to a subcutaneous oxygen partial pressure and / or carbon dioxide partial pressure as a monitoring variable, and / or with a pulse oximeter sensor ( 34 ) which detects a value related to an oxygen saturation of the person's blood as a monitoring quantity, and - a movement detection arrangement ( 68 ), which captures information about a physical movement of the person as a monitoring variable. Occupational safety system ( 10 ) according to one of the preceding claims, characterized in that the occupational safety system ( 10 ) further comprises a breathing gas arrangement ( 22 ) which of the person ( 12 ) provides inhalation gas or exhaled gas from the person in the work ( 12 ) deduces that the body function sensor arrangement ( 18 ) comprises a respiration detection arrangement which detects information about the respiration of the person as a monitoring variable, and in that the respiration detection arrangement comprises a respiration sensor ( 40 ) for detecting the monitored variable, wherein the monitored variable related to at least one of the following body functions: - respiratory rate, - inhalation depth, - breathing gas consumption per unit time, - exhaled gas composition. Occupational safety system according to claim 10, characterized in that the respiratory gas arrangement ( 22 ) one of the person ( 12 ) respiratory gas reservoir to be carried in the work ( 24 ), wherein the respiration sensor ( 40 ) detects during operation a monitoring quantity which a residual amount of respiratory gas in the respiratory gas reservoir ( 24 ) and / or the consumption of respiratory gas from the respiratory gas reservoir ( 24 ) indicates. Occupational safety system according to one of the preceding claims, characterized in that the control device ( 20 ) is adapted to perform a control operation based on a respiratory rate related monitoring product (f) and an inspiratory air volume related monitoring quantity (Δp) or based on a respiratory gas consumption amount corresponding to that product. Occupational safety system ( 10 ) according to one of the preceding claims, characterized in that the protective equipment ( 14 ) a protective clothing, in particular in the form of a protective suit ( 30 ) and / or a protective helmet ( 32 ) and / or a protective mask ( 26 ). Occupational safety system ( 10 ) according to one of the preceding claims, further characterized by an environmental sensor arrangement ( 58 ), which of the person ( 12 ) is to be carried in the labor input and which at least one on one Hazard environment the person related environment size ( 12 ), wherein the environmental sensor arrangement ( 58 ) with the mobile communication unit ( 16 ), and wherein the mobile communication unit ( 16 ) in the work using the wireless communication medium ( 49 . 50 ) environmental information or the monitoring information based on the at least one environment size to the control device ( 20 ) transmits.

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