DE202014104323U1 - Data communication device and data communication system - Google Patents

Abstract

Data communication device comprising: a supply voltage input (101), an arithmetic and data unit (102), a first radio communication module (103) for wireless data exchange with an external radio device (104), a switch-on unit connected to the supply voltage input (101 ) and has a voltage output which is connected to the computing and data unit (102), the switch-on unit (105) containing a second radio communication module (301) for wireless communication with the external radio device (104), wherein the second radio communication module (301) can be operated in a standby mode in which it waits for a communication request from the external radio device (104) and / or sends a communication request to the external radio device (104), the second Radio communication module (301) is designed, when receiving a communication request from the external radio device (104), to cause the ins l unit (105) supplies the arithmetic and data unit (102) with a supply voltage (V1) via the voltage output in order to activate the arithmetic and data unit (102), the data communication device being designed when the arithmetic and data unit ( 102) is activated by supplying the supply voltage (V1) to activate the first radio communication module (103) and to put it in a waiting mode in which the first radio communication module responds to a communication request from the external radio device (104 ) waits and then performs a data exchange between the computing and data unit (102) and the external radio device (104) upon receipt of the communication request, the data communication device being designed for the first radio communication module (103) into one inactive state (non-operating mode or non-standby mode) is set or deactivated and the second radio communication module (301) in the Stan dby mode overrides when or after data exchange is complete.

Description

The present invention relates to a data communication device and a data communication system.

There are a number of orthopedic devices that are powered by a battery or a rechargeable battery. The communication with another device, such as a PC (personal computer), takes place here wired via a cable or wirelessly via a radio link.

For example, a prior art is known, according to which an orthopedic navigation system is provided, which serves the physician as an intelligent tool for joint surgery, for example for patient-specific positioning of implants in the field of endoprosthetics. Intraoperatively with the help of a video-optical camera system, the position of infrared light sources (passive, infrared light-reflecting transmitter), which are attached to the patient's body for example, is detected in the room. The position and position of the infrared-reflecting transmitters relative to one another and also the position and position of the surgical instruments relative to the patient can be calculated. The measured values are calculated with additional data (for example, preoperative planning data) and assist in the placement and positioning of the implant. In addition, the individual implant components can be matched to each other in order to ensure optimal alignment of the durability and function of the implants.

6 shows by way of example a device comprising a camera with associated electronics, as camera electronics 602 summarized, contains and with a computing and display device (for example, PC) 604 communicates via a cable LK. Via a voltage input 601 (Voltage socket) becomes an input voltage Vin to a voltage converter board 605 supplied, which converts the input voltage Vin into an output voltage Vout and this of the camera electronics 602 supplies. This output voltage Vout is used to power the camera electronics 602 , The camera, which receives the reflected light beams from the so-called transmitters (light reflection elements) and converts them into corresponding signals, transmits these signals via a line LD and a data socket 613 and the cable LK to the computing and display device 604 , The computing and display device 604 optionally processes the data supplied, which may have already been preprocessed in the camera electronics, and finally displays corresponding images together with the evaluated navigation data. With the camera electronics 602 For example, two light-emitting diodes (LEDs) 609 and 610 indicating whether the camera electronics, the output voltage Vout is supplied (LED 609 ) and if an error has occurred (LED 610 ).

However, if, for example, during a surgical procedure, the camera is to wirelessly communicate with the computing and display device wirelessly, a higher data throughput (and higher data rate) is often needed per radio link, for example exceeding 500 kbit / s. Thus, radio technologies must be used, which usually not only offer a higher data rate, but also have a higher power consumption. However, the power consumption during operation is not necessarily the biggest problem, but the standby power, while a device or the corresponding radio module is ready to enter a connection or waiting for a connection request. This significantly affects the battery life of the battery or battery operated devices when they are ready to be connected at any time.

To address this problem, for example, a battery or a rechargeable battery having a larger capacity can be selected according to the power consumption requirements, but with a higher space requirement for the battery or accumulator and much higher costs. Another possibility is to switch the radio module on and off by means of a switch which is switched on and off by a user. However, this is contrary to the requirement for the constant readiness to enter into a connection.

There are various wireless technologies with different characteristics such as data throughput, data transfer rate, range, frequency, channels, etc. known. These include, but are not limited to, Z-Wave, EnOcean batteryless wireless sensors, Zigbee, Bluetooth, WiFi (802.11a, 802.11b, etc.), WUSB (wireless USB), WHDI (SRI), and WiHD (wireless HDMI) as well as proprietary solutions. In the field of medical technology, certain radio standards have been established, notably Bluetooth, Zigbee and WiFi. However, these have not prevailed in particular in joint surgery.

"Bluetooth" is generally divided into "Classic" and "Low Energy". "Classic" refers to the original protocols Bluetooth 3.0, Bluetooth 2.1 ... whose modules or chips are also referred to as Classic module. Since Bluetooth 4.0 there is also the option of "Low Energy" (additional protocol stack to "Classic"), with the cost-effective way an energy-saving operation due to a fast connection setup is possible. However, corresponding Bluetooth low-energy modules achieve only a lower data transmission rate and a lower data throughput. Bluetooth 4.0 modules on the market are based on the Classic protocol alone or on the low-energy protocol, so-called single-mode modules, as well as on both protocols, so-called dual-mode modules, in which between the Classic Mode and the low-energy mode can be changed. However, even such a dual-mode module has a higher energy consumption in the activated state before establishing a connection than the single-mode module, since the energy consumption before the establishment of a connection in the classic mode.

The object of the present invention is to provide a data communication device and a method for data communication, which offer a high data rate and at the same time can be used to save energy, in particular in orthopedics, for example during a surgical procedure.

The object is achieved with the features of the independent claims. The dependent claims are directed to preferred embodiments of the invention.

According to the invention, there is provided a data communication apparatus comprising: a power supply input, a computing and data unit including a first wireless communication module for wireless communication with an external wireless device or connected to the first wireless communication module; coupled to the supply voltage input and having a voltage output connected to the computing and data unit, the power-on unit including a second radio communication module that wirelessly communicates with the external radio device, the second radio communication module in a standby mode is operated by waiting for a communication request from the external wireless device and / or sending a communication request to the external device, and when the second wireless communication module receives a communication request from the external wireless device, the second wireless co mmunikationsmodul causes the turn-on of the computing and data unit supplies a supply voltage via the voltage output to activate the computing and data unit, and when the computing and data unit is activated by supplying the supply voltage, the first wireless communication module activated and is put into a waiting mode in which the radio communication module waits for a communication request from the external radio device and then, upon receiving the communication request, exchanges data between the computing and data unit and the external radio device, and when the Data exchange is completed, the second radio communication module goes into standby mode.

The first radio communication module may transition to an inactive state upon completion of the data exchange.

The first radio communication module is preferably a Bluetooth communication module, for example a Bluetooth Classic module or a Bluetooth dual-mode module.

Further preferably, the second radio communication module is a Bluetooth communication module, such as a Bluetooth low-energy module (BLE module), for example, a Bluetooth single-mode low-energy module.

Accordingly, when the first and / or second wireless communication module is a Bluetooth communication module, the external wireless device may also include a corresponding Bluetooth communication module for Bluetooth communication with the first / second wireless communication module.

Further preferably, the first radio communication module has a higher data transmission rate and / or a higher data throughput and in standby mode a higher energy consumption than the second radio communication module. The standby mode preferably refers to a state of readiness for entering a radio link.

The data transmission rate of the first radio communication module is for example at least 200 kbit / s, more preferably at least 250 kbit / s. Further preferably, the data transmission rate of the first radio communication module is more than a 1 Mbit / s. Still preferably, the transmission rate of the first radio communication module is more than 1.5 Mbit / s. The data throughput of the first radio communication module is for example at least 100 kbit / s. For example, the power consumption of the second wireless communication module in standby mode is less than 20 μA.

A voltage supply unit may be connected between the supply voltage input and the switch-on unit, and the voltage supply unit may have a chargeable accumulator.

Instead, the data communication device may comprise a battery which supplies the power-on unit with a battery voltage which serves to supply power to the second radio-communication module, wherein the power-on unit may comprise a voltage switching unit which is respectively coupled to the second radio communication module and the supply voltage input and the arithmetic unit and the data unit supplies the supply voltage via the voltage output upon receipt of a corresponding signal from the second radio communication module and interrupts the supply of the supply voltage to a corresponding signal from the second radio communication module.

The computing and data unit may include a camera that receives image data, and the image data may be transmitted in unprocessed or processed by means of the computing and data unit form via the first radio communication module to the external radio device. The camera can be designed, for example, in orthopedics, in particular a camera of an orthopedic navigation system, and furthermore, in particular, for use during an operative procedure. This camera can emit infrared light and detect the light reflected from corresponding reflecting transmitters and convert it into signals for transmission to, for example, the computing and data unit. However, other light beams can also be picked up by the camera and forwarded to the computing and data unit for further processing and display. The image data thus relate to signals of any shape that can be detected or recorded by the camera and transmitted in unprocessed or processed form by radio to the external radio device.

The second radio communication module, when the data exchange is completed, cause the power-on unit to interrupt the supply of the supply voltage via the voltage output to the computing and data unit.

Furthermore, the switch-on unit and the computing and data unit can be connected to one another via a signal line, via which the second radio communication module sends a switch-on signal to the computing and data unit for activating the computing and data unit after the lapse of a predetermined first time period after the delivery of the data Supply voltage from the switching unit to the computing and data unit sends. This can ensure that the computing and data unit can receive and process the switch-on signal.

Furthermore, the second radio communication module can send a switch-off signal via the signal line to the computing and data unit for deactivating the computing and data unit before the power-on unit, after the lapse of a predetermined second period of time, the supply of the supply voltage via the voltage output to the computing and data unit interrupts. This allows the computing and data unit to shut down safely before the power is finally cut off.

The data and arithmetic unit can be connected via a further signal line to the power-on unit, via which the arithmetic and data unit can supply a system status to the power-on unit. This system status may be a termination of the data exchange between the first radio communication module or the data processing unit and the external radio device. Upon receipt of the system status, the second radio communication module may interrupt the connection with the external radio device and enter the standby mode. In addition, the second radio communication module can then cause a shutdown of the computing and data unit and / or an interruption of the supply of the supply voltage to the computing and data unit.

The termination of the data exchange can also be communicated to the second radio communication module or instead by radio from the first radio communication module.

A method for data communication may include operating a second radio communication module of an activation unit in a standby mode, waiting for a communication request from a radio device and / or sending a communication request to the external radio device, and when the second Radio communication module receives a communication request from the radio device, effecting, by means of the second radio communication module, that the power-on unit supplies a power supply to a computing and data unit to activate the computing and data unit, and after the computing and data unit Supplying the supply voltage has been activated, activating a first radio communication module and putting the first radio communication module in a waiting mode in which the first radio communication module is waiting for a communication request from the radio device, and if the first radio communication module in the standby mode receiving a communication request, performing a wireless data exchange between the computing and data unit and the radio device, and when the data exchange is completed, Passing the second radio communication module into standby mode.

The first radio communication module may transition to an inactive state upon completion of the data exchange.

The first radio communication module can communicate by means of Bluetooth, for example a Bluetooth Classic protocol.

The second radio communication module can communicate by means of Bluetooth, for example a Bluetooth low-energy protocol.

The first radio communication module has, for example, a higher data transmission rate and / or a higher data throughput and in standby mode a higher energy consumption than the second radio communication module. In this regard, reference is made to the above figures in terms of data transfer rate, data throughput and energy consumption.

The power-on unit may be supplied with an input voltage from a power supply unit, and the power supply unit may have a chargeable battery. The accumulator is used to power the entire device, so that can be dispensed with a power cable, for example, during an operation. The accumulator can then be recharged, for example. A charging device or charging electronics provided for this purpose can also be provided within the data communication device, via which the voltage switching unit then receives its input voltage. However, the charging electronics can also be provided as an external device and charge the accumulator via the voltage input.

However, the switch-on unit can also or alternatively be supplied with a battery voltage from a battery which serves to supply power to the second radio-communication module, and a voltage switching unit contained in the switch-on unit can supply the computing and data unit with the supply voltage upon receipt of a corresponding signal from the second radio -Kommunikationsmodul out and interrupt the supply of the supply voltage to a corresponding signal from the second wireless communication module out.

The computing and data unit may include a camera that receives image data and the image data may be transmitted in unprocessed or processed by means of the computing and data unit form via the first radio communication module to the radio device. With respect to the camera, reference is made to the above to the data communication device.

When the data exchange is completed, it can be caused by means of the second radio communication module that the switch-on unit interrupts the supply of the supply voltage to the computing and data unit.

An activation signal can be sent from the second radio communication module to the arithmetic and data unit for activating the arithmetic and data unit after the elapse of a predetermined first time period after the supply voltage has been supplied by the activation unit to the arithmetic and data unit.

Furthermore, a switch-off signal can be sent from the second radio communication module to the computing and data unit for deactivating the computer and data unit before the supply of the supply voltage from the switch-on unit to the computer and data unit is interrupted after the lapse of a predetermined second time duration.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Show it:

1 a block diagram of a data communication device according to an embodiment of the present invention;

2 a block diagram of a data communication device according to a modified embodiment of the present invention;

3 a block diagram of a power-on unit according to the present invention;

4 a block diagram of a data communication device according to another embodiment of the present invention;

5 a turn-on unit according to the present invention, which in the data communication device of 4 can be used; and

6 an example of a data communication device that transmits data to a computing and display device via cable.

1 shows a block diagram of a data communication device according to an embodiment of the present invention. Via a supply voltage input (eg voltage socket) 101 becomes a power supply unit 106 a voltage V3 supplied. The power supply unit 106 contains an accumulator 107 for example, via the supply voltage input 101 externally or outside the data communication device is loadable. The accumulator 107 or the power supply unit 106 gives a voltage V2 to an activation unit 105 out. The switch-on unit 105 in turn gives a supply voltage V1 to a computing and data unit 102 out. In addition, the switch-on unit 105 via a signal line L1 with the computing and data unit 102 connected via the power-on unit 105 For example, an on and off signal to the computing and data unit 102 for switching the computing and data unit on and off 102 outputs. The computing and data unit 102 can in turn via another signal line L2 a system status to the switch-on 105 provide, for example, the on or off state of the computing and data unit 102 indicates. Finally, the turn-on unit 105 Optionally connected to a first signal display, such as a light-emitting diode (LED), for example, the connection state of the in the Einschalteinheit 105 indicates the radio module contained.

The computing and data unit 102 is with the power supply unit 106 connected via a further signal line L3, via which the power supply unit 106 for example, a state of charge of the accumulator 107 to the computing and data unit 102 and, for example, the computing and data unit 102 Signals, such as control signals, to the power supply unit 106 outputs. The computing and data unit 102 is still optional with a second ad 109 (for example, LED) and third display 110 (LED) connected, the second display 109 For example, indicates whether the computing and data unit 102 the supply voltage V1 is supplied, and wherein the third display 110 For example, indicates whether an error in the computing and data unit 102 occured.

The computing and data unit 102 is, for example, a navigation camera with corresponding electronics of an orthopedic navigation system. The computing and data unit 102 is in turn with a first radio communication module 103 connected or assigns this module 103 on. The first radio communication module 103 For example, a Bluetooth Classic module is as defined above. The first radio communication module 103 communicates by radio (wirelessly) with an external radio device 104 , which is, for example, a computing and display unit for the camera data in the orthopedic navigation system. This computing and display unit may be a normal PC with a built-in or separate monitor, may be a tablet PC, or any other device that can process and / or display at least corresponding camera data. The external radio device 104 however, it may be any device which, by radio, communicates with the first radio communication module 103 communicated. This may for example be another orthopedic device.

In addition, the data exchange between the first radio communication module 103 and the external radio device 104 Be bidirectional, or it can also only data, for example, the camera for further processing to the external radio device 104 be transmitted. However, this does not relate to the possibly necessary bidirectional exchange of data or signals to establish a connection between these two devices.

The first radio communication module 103 is still optional with a fourth ad 111 (For example, LED), for example, the connection state of the connection with the external radio device 104 displays.

2 shows a modified embodiment of the data communication device according to the present invention. Here, the same reference numerals will be used for the same elements as in FIG 1 used. In contrast to 1 contains here a power supply unit 206 both an accumulator 207 as well as a charging device 212 (Charging electronics). The charging device 212 the voltage V3 is via the supply voltage input 101 fed. The charging device 212 charges the accumulator as needed 207 by means of the supplied voltage V3 and outputs the voltage V2 to the switch-on unit 105 out. Here, the data communication device has its own charging device or charging electronics for charging the accumulator.

3 shows an activation unit according to the invention 105 which, for example, in the data communication device of 1 and 2 is used. The voltage V2 from the power supply unit 106 . 206 becomes on the one hand a voltage switching unit 302 and optionally an optional voltage converter 303 fed. The voltage switching unit 302 gives the supply voltage V1 to the computing and data unit 102 out. The voltage converter 303 gives a voltage V5 to a second radio communication module 301 out. If the voltage V2 already corresponds to a suitable voltage for the second radio communication module, the voltage converter 303 not required, so that the voltage V2 (equal to V5) without intermediate voltage converter the second wireless communication module 301 is supplied.

The second radio communication module 301 is, for example, a Bluetooth low-energy module as described above. The second radio communication module 301 is via a signal line L4 with the voltage switching unit 302 connected to it to output a signal indicating whether the voltage switching unit, the supply voltage V1 of the computing and data unit 102 to supply or whether the supply of the supply voltage V1 is to interrupt. Accordingly, the voltage switching unit outputs 302 the supply voltage V1 only to the computing and data unit 102 when the corresponding signal via the signal line L4 instructs this. As required, the voltage switching unit 302 a voltage converter, that of the voltage switching unit 302 supplied voltage V2 in one for the computing and data unit 102 suitable supply voltage V1 converts. The second radio communication module 301 communicates with the external radio device 104 also by radio (wireless).

4 shows another embodiment of a data communication device according to the present invention. The same reference numerals will be used for the same or similar elements as in FIGS 1 and 2 used. The voltage V2 is from the supply voltage input 101 the switch-on unit 105 fed. There is also a battery 401 the switch-on unit 405 a voltage V4 too.

5 shows an activation unit 405 used in the data communication device of 4 can be used. Here, the battery voltage V4 from the battery 401 the voltage converter 303 which supplies the voltage V5 to the second radio communication module 301 supplies. The voltage V2 from the supply voltage input 101 on the other hand, the voltage switching unit 302 supplied, which in turn outputs the supply voltage V1. Here is the battery 401 for the power supply of the second radio communication module 301 (For example, BLE module) responsible, which has low energy consumption, so that of the battery 401 supplied energy is sufficient. In this case, the voltage V2 is across the supply voltage input 101 supplied, which is connected in the operation of the data communication device with an external power source. This external voltage source may also be an accumulator or a battery.

Hereinafter, an operation of the data communication device of the invention will be described by way of example. First, the first radio communication module 103 and the second radio communication module 301 operated such that the first radio communication module 103 is not in operation, ie not in a standby or standby mode, ready to connect or communicate. The second radio communication module 301 On the other hand, it is operated in standby mode in which, for example, it emits a signal even at predetermined intervals, indicating that it is in operation and listening to other devices, whether they are connected or not. a communication with the second radio communication module 301 want to go.

At the beginning then gives the external radio device 104 receiving the ready signal from the second radio communication module 301 receives and selects this for communication, a corresponding signal to the second radio communication module 301 out to establish a connection with this. The external radio device 104 and the second radio communication module 301 then, if necessary after a previously carried out authorization, enter into a communication connection with each other.

The second radio communication module then effects 301 that the computing and data unit 102 is activated. This is done for example by the fact that the computing and data unit 102 the supply voltage V1 is supplied. In addition, a final activation of the computing and data unit 102 be done by that the second radio communication module 301 a corresponding switch-on signal via the signal line L1 to the computing and data unit 102 outputs.

At the same time, for example, the first radio communication module 103 by supplying the power supply to the waiting mode in which the first radio communication module 103 for entering into a radio connection with the external radio device 104 ready to be relocated. According to a first waiting mode, the first radio communication module 103 send out an appropriate signal with which it identifies itself. However, if the external radio device, the address (in general: identification data for addressing) of the first radio communication module 103 is known, according to another, second waiting mode, the transmission of a corresponding identification signal from the first radio communication module 103 omitted. The external radio device 104 can then send a corresponding signal to the first radio communication module 103 with the request of a connection setup. The connection is then possibly made after a corresponding authorization process, so that then the data exchange between the first radio communication module 103 and the external radio device 104 can be carried out.

If the data exchange is completed, then the first radio communication module 103 from the computing and data unit 102 is set in an inactive state (non-operation mode or non-standby mode), and the second radio communication module 301 goes into standby mode accordingly. This can be done by the computing and data unit 102 a corresponding signal to the second radio communication module 301 outputs via the signal line L2.

The first radio communication module 103 can also after completion of the data exchange by means of a corresponding signal from the external radio device 104 be deactivated. The first radio communication module 103 may continue after a predetermined period of time after there is no signal from the external radio device 104 received, go into the inactive state. If the first radio communication module 103 not from the computing and data unit 102 However, the computing and data unit can be put into the inactive state 102 the state of the first radio communication module 103 monitor and in its inactive state, the first radio communication module 103 put into standby mode, for example by means of a corresponding signal via the signal line L2. On the other hand, the external radio device 104 whose data exchange with the first radio communication module 103 terminated or is interrupted or should be, a corresponding radio signal to the second radio communication module 301 send, which causes the second radio communication module 301 goes into standby mode. Another possibility is that the external radio device 104 a corresponding termination signal to the second radio communication module 301 sends, which then first a corresponding shutdown signal, for example via the signal line L1 to the arithmetic and data unit 102 outputs, and the computing and data unit 102 then according to the first radio communication module 103 disabled. The second radio communication module 301 can then go to standby mode after delivery of the shutdown signal, or can first on a confirmation signal from the computing and data unit 102 , For example, via the signal line L2, wait, the deactivation of the first radio communication module 103 indicates until it then goes into standby mode.

Before the second radio communication module 301 goes into standby mode, it can send a corresponding signal to the voltage switching unit 302 output, so that this the output of the supply voltage V1 to the computing and data unit 102 interrupts. This can, for example, after elapse of a predetermined period of time after the "shutdown" of the computing and data unit 102 respectively. That is, it must be depending on whom the deactivation of the first radio communication module 103 and the second radio communication module 301 is initiated, to ensure that the interruption of the supply of the supply voltage V1 to the computing and data unit 102 is performed only when the first radio communication module 103 has been disabled and the computing and data unit 102 has completely finished their processes and thus their power supply can be interrupted.

Thus, if, for example, a high transmission rate of the first radio communication module 103 for data transmission between the first radio communication module 103 and the external radio device 104 is required and in addition a low power consumption is desired or required, it is advantageous to a Bluetooth Classic module, which provides such a high data transmission rate, for the first radio communication module 103 and a Bluetooth low-energy module, which does not offer this high data transfer rate, but consumes as little energy in standby mode and / or to establish a communication connection as that for the first radio communication module 103 used Bluetooth Classic module is not possible for the second wireless communication module 301 possible, while ensuring a high data transfer rate between the data communication device and the external radio device 104 consume little energy, so that the battery power or battery power for the operation of the data communication device during, for example, a surgical procedure that may last for example four hours, is sufficient.

There is thus provided, inter alia, a data communication apparatus comprising: a supply voltage input ( 101 ), a computing and data unit ( 102 ), which is a first radio communication module ( 103 ) for wireless data exchange with an external radio device ( 104 ) or with the first radio communication module ( 103 ), an activation unit connected to the supply voltage input ( 101 ) and has a voltage output connected to the arithmetic and data unit ( 102 ), wherein the switch-on unit ( 105 ) a second radio communication module ( 301 ), which is wirelessly connected to the external radio device ( 104 ), wherein the second radio communication module ( 301 ) is operated in a standby mode, in response to a communication request from the external radio device ( 104 ) and / or a communication request to the external radio device ( 104 ) and when the second radio communication module ( 301 ) a communication request from the external radio device ( 104 ), the second radio communication module ( 301 ) causes the turn-on unit ( 105 ) of the computing and data unit ( 102 ) supplies a supply voltage (V1) via the voltage output to the computing and data unit ( 102 ) and if the computing and data unit ( 102 ) is activated by supplying the supply voltage (V1), the first radio communication module ( 103 ) is activated and placed in a waiting mode in which the radio communication module is in response to a communication request from the external radio device ( 104 ) and then upon receipt of the communication request a data exchange between the computing and data unit ( 102 ) and the external radio device ( 104 ), and when the data exchange is completed, the second radio communication module ( 301 ) goes into standby mode.

Claims (12)

A data communication device, comprising: a supply voltage input ( 101 ), a computing and data unit ( 102 ), a first radio communication module ( 103 ) for wireless data exchange with an external radio device ( 104 ), an activation unit connected to the supply voltage input ( 101 ) and has a voltage output connected to the arithmetic and data unit ( 102 ), wherein the switch-on unit ( 105 ) a second radio communication module ( 301 ) for wireless communication with the external radio device ( 104 ), wherein the second radio communication module ( 301 ) is operable in a standby mode in response to a communication request from the external radio device ( 104 ) and / or a communication request to the external radio device ( 104 ), the second radio communication module ( 301 ) is adapted, upon receipt of a communication request from the external radio device ( 104 ) to cause the turn-on unit ( 105 ) of the computing and data unit ( 102 ) supplies a supply voltage (V1) via the voltage output to the computing and data unit ( 102 ), wherein the data communication device is adapted to, when the computing and data unit ( 102 ) is activated by supplying the supply voltage (V1), the first radio communication module ( 103 ) and to put it into a waiting mode in which the first radio communication module is in response to a communication request from the external radio device ( 104 ) and then upon receipt of the communication request a data exchange between the computing and data unit ( 102 ) and the external radio device ( 104 ), wherein the data communication device is designed such that the first radio communication module ( 103 ) is set or deactivated in an inactive state (non-operating mode or non-standby mode) and the second radio communication module ( 301 ) goes into standby mode when or after the data exchange is completed. A data communication device according to claim 1, wherein said first radio communication module ( 103 ) is a Bluetooth communication module. A data communication device according to claim 1 or 2, wherein the second radio communication module ( 301 ) is a Bluetooth communication module. Data communication device according to one of claims 1 to 3, wherein the first radio communication module ( 103 ) a higher data transmission rate and in the standby state a higher energy consumption than the second radio communication module ( 301 ) having. Data communication device according to one of claims 1 to 4, wherein a power supply unit ( 106 . 206 ) between the supply voltage input ( 101 ) and the activation unit ( 105 ), and the power supply unit ( 106 . 206 ) a chargeable accumulator ( 107 . 207 ) having. A data communication device according to any one of claims 1 to 4, further comprising a battery ( 401 ), which the Einschalteinheit ( 105 ) supplies a battery voltage (V4) which is used to supply power to the second radio communication module ( 301 ), wherein the activation unit ( 105 ) a voltage switching unit ( 302 ), each connected to the second radio communication module ( 301 ) and the supply voltage input ( 101 ) and the computing and data unit ( 102 ) the supply voltage (V1) via the voltage output to the reception of a corresponding signal from the second radio communication module ( 301 ) and supplying the supply voltage (V1) to a corresponding signal from the second radio communication module (V1). 301 ) interrupts. A data communication device, comprising: a supply voltage input ( 101 ), a computing and data unit ( 102 ), a first radio communication module ( 103 ) for wireless data exchange with an external radio device ( 104 ), an activation unit connected to the supply voltage input ( 101 ) and has a voltage output connected to the arithmetic and data unit ( 102 ), wherein the switch-on unit ( 105 ) a second radio communication module ( 301 ) for wireless communication with the external radio device ( 104 ), wherein the second radio communication module ( 301 ) is operable in a standby mode in response to a communication request from the external radio device ( 104 ) and / or a communication request to the external radio device ( 104 ), the second radio communication module ( 301 ) is adapted, upon receipt of a communication request from the external radio device ( 104 ) to cause the turn-on unit ( 105 ) of the computing and data unit ( 102 ) supplies a supply voltage (V1) via the voltage output to the computing and data unit ( 102 ), wherein the data communication device is adapted to, when the computing and data unit ( 102 ) is activated by supplying the supply voltage (V1), the first radio communication module ( 103 ) and to put it into a waiting mode in which the first radio communication module is in response to a communication request from the external radio device ( 104 ) and then upon receipt of the communication request a data exchange between the computing and data unit ( 102 ) and the external radio device ( 104 ), wherein the computing and data unit ( 102 ) has a camera for receiving image data which is sent to the external radio device ( 104 ) are transferable. Data communication device according to claim 7, wherein the image data are in unprocessed or by means of the computing and data unit ( 102 ) processed form via the first radio communication module ( 103 ) to the external radio device ( 104 ) are transferable. A data communication device according to any one of claims 1 to 8, wherein when the data exchange is completed, the second radio communication module ( 301 ) causes the turn-on unit ( 105 ) the supply of the supply voltage (V1) via the voltage output to the computing and data unit ( 102 ) interrupts. Data communication device according to one of claims 1 to 9, wherein the switch-on unit ( 105 ) and the computing and data unit ( 102 ) are connected to each other via a signal line (L1) via which the second radio communication module ( 301 ) a turn-on signal to the computing and data unit ( 102 ) for activating the computing and data unit ( 102 ) after the lapse of a predetermined first period of time after the supply voltage (V1) has been supplied by the switch-on unit ( 105 ) to the computing and data unit ( 102 ) sends. Data communication device according to one of the preceding claims, which is designed such that the second radio communication module ( 301 ) via the signal line (L1) a switch-off signal to the computing and data unit ( 102 ) for deactivating the computing and data unit ( 102 ) before the switch-on unit ( 105 ) after the passage of a predetermined second period of time, the supply of the supply voltage (V1) via the voltage output to the computing and data unit ( 102 ) interrupts. A data communication system comprising: a first radio communication module ( 103 ), a second radio communication module ( 301 ) an activation unit ( 105 ), which is operable in a standby mode, in response to a communication request from a radio device ( 104 ) and / or a communication request to the external radio device ( 104 ), wherein the system is adapted, then when the second radio communication module ( 301 ) a communication request from the radio device ( 104 ), by means of the second radio communication module ( 301 ) to cause the turn-on unit ( 105 ) of a computing and data unit ( 102 ) supplies a supply voltage (V1) to the computing and data unit ( 102 ) after the computation and data unit ( 102 ) was activated by supplying the supply voltage (V1), the first radio communication module ( 103 ) and the first radio communication module ( 103 ) in a wait mode in which the first radio communication module ( 103 ) to a communication request from the radio device ( 104 ) waits when the first radio communication module ( 103 ) receives in the standby mode a communication request, a wireless data exchange between the computing and data unit ( 102 ) and the radio device ( 104 ), the system being designed such that the second radio communication module ( 301 ) goes into standby mode when the data exchange is completed.

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