Patent Application
20110121990
The invention relates to a module with a radio transceiver device, an actuator, and an activation device. The invention further relates to a system and a method comprising such a module and a central unit.
Modules with the features described in the introduction are constructed to communicate, for example, with the central unit wirelessly, for example, by means of radio signals. By means of this wireless communications, information is exchanged between the module and the central unit. Here, the module transmits, for example, a unique identification code to the central unit in order to identify itself relative to this code. The central unit, in turn, transmits data to the module, wherein this data provides target values for the actuator to the module. The module converts the data into an electrical signal, which is fed as a target value, setting value, or drive signal to the actuator. The actuator converts the electrical signal into a physical effect. This can be a rotation of a servomotor or an action on an electromechanical switch element. Together with the actuator, such a module fulfills the task of either turning on or off or also controlling or regulating, by means of the actuator, a control, regulating, or lighting device or other technical devices. The actuator used in the module or interacting with the module depends on the technical device on which the actuator acts or with which the actuator is coupled. If the actuator is merely an electromechanical switch, then this is suitable, for example, for turning on and off lighting devices or other electrical loads. If the actuator is an electric motor, then this is suitable for regulating devices, for example, for actuating heating valves or other building-related devices. By means of the central unit, communications with a plurality of such modules is possible. In this way, a plurality of control or regulating devices, such as radiator valves or electrical loads, can be controlled, regulated, or also merely turned on or off centrally.
Electrical energy supply to the module is needed in order to receive each message for the module from the central unit and to perform an action by means of the actuator. The message is transmitted by means of a radio signal from the central unit to the module. The module must be supplied with electrical energy in order to be able to receive the message because only then is the radio transceiver unit also ready to receive. This means that a consumption of electrical energy is connected with the reception of the message, which also lasts through the time periods during which the central unit transmits no message to the module. This means that electrical energy is consumed at the module also during the transmission pauses in which no signal is transmitted to the module. Higher energy consumption is the result.
Consequently, the task of the invention is to propose a solution to reduce the energy consumption on the part of the module.
This task is achieved by the measures described in Claims 1, 15, and 18. The measures that are described in the subordinate claims associated directly or indirectly with these claims advantageously form these measures.
In the following, the method with the module, the module itself, and a system with the module and a central unit are described.
A module is provided with a radio transceiver device, an actuator, and an activation device. The activation device is coupled with the radio transceiver device and the actuator and an energy source and is constructed to feed electrical energy from the electrical energy source to the radio transceiver device and the actuator.
The radio transceiver device comprises a transmitter unit and a receiver unit, as well as an evaluation unit that evaluates and/or controls signals to be transmitted or those that were received with the radio transceiver device. Received signals comprise, for example, values that are fed to the actuator as a control value or as a target value by means of an electrical signal. As the actuator, nearly any device can be used that, by means of an electrical signal, either initiates a mechanical motion or triggers an electrical switching or control process, and is thus not limited just to an electromechanical switch or an electrometer. The actuator has, in general, the task of converting an electrical signal into a physical parameter. Thus, an actuator can be, for example, a part of an air-conditioning system or a heating system. In a simple case, the electrical signal to the actuator is a turn-on or a turn-off command, or a control signal that acts on a valve by means of an electric motor, whereby a temperature change in a heating system is realized that leads to a temperature change by means of the actuator, or to the action triggered by the actuator. Thus, electromechanical, inductive, capacitive, pyroelectric, photoelectric, piezoelectric, or thermoelectric actuators are provided as the actuators. Actions caused by the actuator are, for example, a lighting control by means of a dimmer switch, a temperature control by means of a heating or air-conditioning system, transmission of an alarm signal, and transmission of information on a communications medium, such as telephone, mobile radio, or Internet.
Different energy sources are possible for powering the module with electrical energy, for example, a public power grid connection that uses the electrical system in the house as an energy source, or an accumulator or another electrochemical storage device. Other energy sources can also be used, such as thermoelectric converters, piezoelectric converters, or other electrical converters which convert the energy present in the surroundings, such as light, temperature, or motion into electrical energy. Thus, for example, the heat of a heating system or its radiators, which are installed in a building, can be used as a heat source for a thermoelectric converter.
Through the coupling of the activation device with the energy source on the one hand, and of the actuator and the radio transceiver device on the other hand, the activation device forms a connection between the energy source and the radio transceiver device and the actuator. The activation device thus determines the energy supply to the module. The activation device itself is always provided with electrical energy from the energy source. This applies at least as long as the energy source itself has sufficient energy for powering the activation device.
In this way, it is achieved that the energy-intensive components of the module, such as the radio transceiver device and the actuator, are provided with electrical energy only when the activation device supplies electrical energy to the radio transceiver device and to the actuator.
In one refinement of the measures described above, the activation device controls the supply of electrical energy to the radio transceiver device and to the actuator as a function of an available amount of electrical energy. For this purpose, the module preferably has means that determine the amount of available electrical energy in the energy source. Preferably, the means also comprise decision algorithms, which, by means of an electronic comparison device decide, as a function of the energy level in the energy source, whether there is sufficient energy for powering the radio transceiver device and the actuator, and feeds electrical energy to the radio transceiver device and to the actuator only when there is sufficient energy.
This is refined in that the activation device can be controlled through predeterminable or random time intervals, and thus the supply of electrical energy to the radio transceiver device and to the actuator occurs according to predeterminable, essentially regular time intervals or else also random time intervals. One refinement provides the supply of electrical energy according to predeterminable or random time intervals in combination with the supply of electrical energy to the radio transceiver device as a function of the amount of electrical energy available in the energy source. Another energy potential is formed, because, in this way, the time intervals can also be changed as a function of the available amount of electrical energy.
This is then especially advantageous when the electrical energy is formed in the energy source by means of a conversion of environmental energy into electrical energy. This is because the electrical energy is not always available in the same amount. Also, the environmental energy is not always available at the point in time when electrical energy is needed. Thus, if the energy source is supplied from solar energy, for example, by means of a photoelectric converter, then electrical energy is available only during the day or only when there is sufficient light irradiation. For this reason, it is preferred, in connection with an electrical energy source supplied with environmental energy, to provide an electrical energy storage device in which the converted electrical energy is stored for the time of need.
The converter is based, just like the actuator, on an electrophysical principle that converts environmental parameters into electrical energy. In interaction with the module, the converter is directed toward the most efficient energy yield possible, so that in connection with a module, different physical parameters than those generated with the actuator can be used for obtaining energy. The converter is to be selected according to the installation site and the most frequently occurring form of convertible energy at this site. The converter, just like the actuator, is formed according to an electromechanical, inductive, capacitive, pyroelectric, photoelectric, piezoelectric, or thermoelectric principle or a combination of these.
For time-dependent control of the energy supply, the activation device preferably includes a time-generating element. The time-generating element is an element of the activation device, which is always connected to the energy source, and thus is always supplied with energy, as long as the energy source also has sufficient energy for powering this time-generating element.
With the supply of electrical energy to the radio transceiver device, the radio transceiver device first transmits a first radio signal and, in this way, transmits its receive or communications readiness to a central unit at a remote site. The first radio signal thus forms a communications readiness signal. The remote central unit receives and evaluates this signal and recognizes, by means of comparison algorithms, that a radio transceiver device of a module has transmitted its receive or communications readiness by means of this signal. By means of the comparison algorithm, it can also be determined from which module the communications readiness signal was sent. In particular, an identification of each individual module is advantageous when a plurality of modules is in radio communication with the central unit. The module or the radio transceiver device transmits an identification signal with the communications readiness signal. This identification signal can be transmitted in the form of a digital ID number. The remote unit receives and identifies a radio signal for signaling the communications readiness of a certain radio transceiver device, and thus a certain module of a plurality of modules within the effective range of the central unit. The central unit comprises a data storage device, which stores the data to be transmitted to the individual modules. The data storage device stores the data for each individual module until the data has been successfully transmitted to each individual module.
After reception of the communications readiness signal by the central unit, the information packet provided for the module at the central unit is selected from the data storage device and sent from the central unit by means of a radio signal. The radio signal can be received by the module. After successful reception of the information packet, the module can end the reception readiness of the radio transceiver device and can, in this way, save electrical energy. The information packet can be augmented with a completion signal. The reception readiness is ended when the completion signal is received. The received data is evaluated after its reception.
As an alternative to the communications between the central unit and the module just described, joint bidirectional communications can be set up by the two parties, by means of which not only can an information packet be on the one hand transmitted from the central unit to the module, but also values or information can be transmitted from the module to the central unit. This is, for example, a confirmation signal after all of the data of the information packet has been received, or measurement data of a sensor that is coupled with the module or that is integrated into the module. In connection with bidirectional communications, the information can also be augmented with a completion signal. When the completion signal is received, the bidirectional communications are ended.
During the bidirectional communications, the radio transceiver device of the module receives all of the information stored and prepared for it at the central unit. With this information, the module executes actions by means of the actuator, activating a control or regulating device or a switch. Also, the actuator is supplied with electrical energy by the activation device.
The bidirectional communications are maintained either until all of the data of the central unit is transmitted to the module, a completion signal has been received, or the module breaks the communications due to decreasing electrical energy in the energy source. For this case, the central unit retains the non-transmitted information in its storage device and transmits the remaining information with the next radio connection established with the module.
In order to be able to perform the processes described above, the central unit has available a radio transceiver device so that radio signals can be received and also transmitted by the central unit.
As already mentioned, the module can also be expanded with a sensor. This is similarly supplied with electrical energy by means of the activation device. The sensor detects a physical value and converts this into an electrical signal that is a reference signal for the physical value. The value detected by the sensor can be transmitted to the central unit by means of the radio transceiver device. This also offers the advantage that the central unit is immediately provided with actual values at the sensor and these can be supplied for processing. Thus, the target values transmitted to the actuator can be immediately recalculated and transmitted to the actuator via the radio transceiver device. The bidirectional communications between the module and the central unit allows such a method in connection with the sensor on the module.
The method with the module, the module itself, and a system with the module and a central unit have been described above. The invention will be described in more detail below with the help of one embodiment and three figures.
Shown are
In
The two components, both the radio transceiver device 20 and also the actuator 30 are coupled with an activation device 40. The activation device 40 supplies electrical energy to the radio transceiver device and to the actuator 30 for their operation. For this purpose, the activation device 40 is coupled with an energy source 50. The activation device 40 receives the electrical energy, which the energy source 50 feeds to the radio transceiver device 20 and the actuator 30, and is, here, connected to the energy source 50 and supplied with electrical energy from this source. The energy-intensive processes of the module 10, for example, the transmission or the reception of radio signals, as well as the generation of physical values or effects by means of the actuator or the execution of movements by means of the actuator, such as to drive an electric motor, are thus limited to the time periods in which electrical energy is supplied to the radio transceiver device and/or to the actuator. The energy supply to the radio transceiver 20 and to the actuator 30 is consequently dependent on the activation device 40.
The activation device 40 is constructed for supplying energy to the radio transceiver device 20 and the actuator 30. For this purpose, different variants are provided. In a first variant, the radio transceiver device 20 and the actuator 30 are supplied with energy with the activation device 40 by means of a time-defined sequence, in predeterminable or random time intervals. Thus, the energy-intensive processes are operated only throughout the time period during which the activation device supplies these processes with energy. In another variant, the energy supply of the radio transceiver device 20 and the actuator 30 is controlled as a function of the energy level in the energy source 50. Thus, for example, for a low energy level in the energy source 50, it is possible to select longer time intervals between energy supply or to shorten the duration of energy supply to the radio transceiver device 20 and to the actuator 30. If the energy level in the energy source 50 rises, then the time intervals can be adjusted. As the energy source 50, for example, a public power grid supply from typical household installations is to be used. In this case, sufficient energy reserves in the energy source 50 can be assumed, because this delivers electrical energy in a sufficient amount. For household installations with a plurality of modules supplied with information by a central controller, the energy-saving potential is especially large just on the basis of the plurality of modules.
Another example of an energy source 50 is the energy source from environmental energy. For this purpose, an electrophysical converter is provided that converts the energy present in the surroundings of the module into electrical energy. Such an energy source is advantageously coupled with an electrical energy storage device, for example, with a capacitor or an accumulator.
As an alternative, an energy storage device in the form of an electrochemical battery or an electrochemical accumulator can also be used as the energy source 50. However, the energy reserves in the energy source are limited compared with the public power grid supply. The energy saving advantage gains significantly in importance with such an energy source, because the need for radio transmission events can be reduced to a minimum with the provided module 10.
Furthermore, the energy source 50 of the embodiment of
The actuator 30 is coupled with a control or regulating device 300, which is part of a building-specific installation. This is, for example, a heating device, an air-conditioning system, a lighting device, a light switch, an alarm system, or the like.
If the radio transceiver device 20 is supplied with electrical energy by the activation device 40, then the radio transceiver device 20 begins its radio operation with a first radio signal that is a communications readiness signal 100. This communications readiness signal 100 is transmitted and received by a remote central unit 200. The remote central unit 200 identifies the module that has transmitted the signal, determines whether information is present for the module, and transmits this information by means of a radio signal to the radio transceiver device 20. In the embodiment, bidirectional communications 110 are provided, but the communications do not have to be bidirectional. Bidirectional communications between the central unit 200 and the module 10 offers the advantage, for example, that the radio transceiver device 20 of the module 10 can confirm the completed reception by means of a confirmation signal to the central unit 200.
The module 10 with the sensor 35 can detect physical effects PE, such as temperature, light, air pressure, moisture, or other physical effects, which can be converted into an electrical signal. These are converted into an electrical signal, and this is transmitted to the radio transceiver device 20 for transmission to the remote unit 200 by means of bidirectional communications 110.
The sensor 35 and actuator 30 are essentially similar in their basic physical active principles, often only inverted relative to each other. Thus, the application of an electrical voltage to a coil of an electromagnetic converter induces a magnetic field, which exerts a mechanical force on a ferromagnetic body. In reverse, a mechanical force or a movement of the ferromagnetic body in the magnetic field of the electromagnetic converter induces an electrical voltage on the coil. What sensor and actuator are used is dependent on the environmental conditions to be detected or on the technical unit coupled with the module.
For its part, the remote unit 200 also comprises a radio transceiver unit 210, a processor and storage device 220, and a separate energy supply 230, which is supplied with energy by means of the public power grid supply. This is formed in the embodiment by an L-conductor and an N-conductor, which form the phase conductor and the neutral conductor. The remote unit 200 is coupled, for example, with additional sensors or devices to detect physical values from the surroundings and feed them to a calculation for new target values and control values. These additional sensors or devices are not shown in the figure. The processor and storage device 220 processes the signals transmitted by the radio transceiver device 20 of the module 10 and received by the remote central unit 200. Through real-time processing of the signals, after the calculation of new target values, the new target values can be transmitted immediately to the module by means of bidirectional communications 110. The module receives the new target values by the radio transceiver device 20 and relays a corresponding signal via the means 25 to the actuator 30, whereby this actuator controls the control and regulating device 300.
The control and regulating device 310 of the embodiment shown in
In an especially energy-saving variant of the module 10, the communications 110 are not bidirectional, but instead, after transmitting a communications readiness signal 100, the radio transceiver device is constructed merely for radio reception and, thus, additional energy is saved. Here, the transceiver device merely waits for a radio signal transmitted by the central unit 200 and, after the radio signal is received from the central unit 200, action on the actuator by the activation device 40 ends the energy supply to the radio transceiver device and the actuator.
| Number | Date | Country | Kind |
|---|---|---|---|
| 102007037895.7 | Aug 2007 | DE | national |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/EP2008/059538 | 7/21/2008 | WO | 00 | 2/2/2010 |
