WO2022223602A1 - Antriebssystem, federwiegensystem und verfahren zur simulation eines elastischen spannelements - Google Patents
Antriebssystem, federwiegensystem und verfahren zur simulation eines elastischen spannelements Download PDFInfo
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- WO2022223602A1 WO2022223602A1 PCT/EP2022/060396 EP2022060396W WO2022223602A1 WO 2022223602 A1 WO2022223602 A1 WO 2022223602A1 EP 2022060396 W EP2022060396 W EP 2022060396W WO 2022223602 A1 WO2022223602 A1 WO 2022223602A1
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- drive system
- drive unit
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47D—FURNITURE SPECIALLY ADAPTED FOR CHILDREN
- A47D9/00—Cradles ; Bassinets
- A47D9/02—Cradles ; Bassinets with rocking mechanisms
- A47D9/057—Cradles ; Bassinets with rocking mechanisms driven by electric motors
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47D—FURNITURE SPECIALLY ADAPTED FOR CHILDREN
- A47D13/00—Other nursery furniture
- A47D13/10—Rocking-chairs; Indoor Swings ; Baby bouncers
- A47D13/107—Rocking-chairs; Indoor Swings ; Baby bouncers resiliently suspended or supported, e.g. baby bouncers
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47D—FURNITURE SPECIALLY ADAPTED FOR CHILDREN
- A47D9/00—Cradles ; Bassinets
- A47D9/02—Cradles ; Bassinets with rocking mechanisms
Definitions
- the present invention relates to a drive system for a spring cradle, a spring cradle system and a method for simulating an elastic tensioning element.
- Such a spring cradle usually consists of a reclining device similar to a stretcher, which is attached to a spring suspension.
- the spring suspension is via an elastic oscillating element, usually a spring, with a suspension verbun which is hung on a frame or other bracket such as door frames, etc. freely swinging.
- a load-bearing drive system is usually mounted on this suspension.
- the drive system comprises an electric motor, which periodically exerts a tensile force on the spring suspension via a traction body, causing the stretcher to oscillate up and down.
- the drive system is connected to the spring suspension via the traction body, with the traction body being permanently tensioned. This is necessary so that the drive system receives information about the compression and rebound movement, for example in order to apply the tensile force in the ascending spring movement and not to apply any force in the descending spring movement. Since the oscillation amplitude varies depending on the installed spring, weight (child plus stretcher, plus accessories, etc.) and applied force, the tension body is equipped with a mechanical tensioning element to ensure that the tension body is permanently under tension. This clamping element is usually implemented as a spiral spring on the drive shaft of the motor.
- the clamping element ensures that the traction body, despite variable distances resulting from the weight of the child or the stretcher, the built-in springs, the Amplitu denintensity depending on the drive energy, etc., continuously, regardless of the deflection of the spring, with the drive system is connected.
- a sensor such as a servomotor or dynamo, can record information about the vibration speed and direction and can thus control the energy to amplify or maintain the vibration movement.
- EP 3 197323 B1 relates to a device for generating a see-saw movement on supports for babies, comprising a frame arranged on a base with a support arm and a traction mechanism which is designed for suspending the support.
- DE 102018006463 A1 relates to a spring cradle which is suspended from an elastic element and is made to oscillate by an eccentrically rotating mass.
- a drive system for a spring cradle system for generating an oscillating movement, comprising: a pulling element with a distal end which is designed to be attached to an oscillating element, a drive unit configured to increase and decrease a free length of the pulling member to change a position of the vibrating member relative to the drive system, and a control unit configured to control the drive unit so that a Biasing force acts on the tension element independently of the position of the oscillating element relative to the drive system.
- a drive system for spring hammocks that operates without a mechanical tensioning element.
- the drive system can be operated almost silently.
- this increases the longevity since fewer mechanical components are used.
- the functionality of a mechanical tensioning element can be imitated algorithmically via a microcontroller-controlled actuation of the drive unit. Thus, no mechanical tensioning element is necessary for the drive system.
- the drive system includes a drive unit, such as an electric motor with a rotating shaft.
- the pulling element such as a rope
- the pulling element can be rolled up, as a result of which a pulling force is passed on through the pulling element in the direction of the drive system.
- the oscillating element can be moved in the direction of the drive system.
- the pulling element can be rolled up onto a roller or pulley that is located on the shaft of the drive unit. If the drive unit is not in operation and the oscillating element moves away from the drive system, the tension element can unwind from the roller, so that the shaft of the drive unit rotates in the opposite direction.
- the free length of the tension element (ie the part of the tension element which corresponds to the distance between the drive system and the oscillating element) can thus be varied. through the Varying the free length of the tension element, a vibration of the vibra gelement can be initiated.
- An oscillating movement performed by the oscillating element can be a movement, the sequence of which is repeated in the same or very similar form periodically or according to predefined movement patterns, in particular complex movement patterns.
- the motor can be connected directly to a roller. In other words, in this case no gear or similar can be provided between the motor and the roller. This allows the force to be used efficiently and large leverage effects to be avoided. A small role can also be provided.
- the roller diameter can essentially correspond to the rotor diameter of the motor.
- the drive system can be provided with a single-track pulley as a role. More details on the pulley follow below. Nevertheless, it is also conceivable to see a gear which is provided between the motor and the roller in order to step up and/or step down the drive energy of the motor.
- the pulling element can be a band-like element, such as a rope or cord, which is designed to carry the vibrating element together with a person accommodated therein.
- a proximal end of the pulling element can be connected to the roller or be in engagement, so that the pulling element is held on the roller even if the pulling element is no longer wrapped around the roller.
- the distal end of the traction element can be the opposite end of the traction element to the proximal end, which end is connected or can be connected to the vibrating element.
- a portion (i.e., a particular length range) of the tension member that is not wrapped around the pulley may define the free length of the tension member.
- the drive unit can be an electric motor, generates a rotational movement by supplying electricity and, for example, by means of a shaft to a role.
- the direction of rotation of the electric motor can be varied.
- the drive unit can have sensors that measure the current applied to the drive unit and can thus provide information about the operation of the drive unit.
- the rotational energy emitted by the drive unit can be measured.
- the control unit can determine whether or not the tension member is connected with tension to the vibrating member.
- the prestressing force can therefore be determined by a defined power supply (for example by applying a certain voltage) to the drive unit.
- the oscillating element can consist of a stretcher or cradle for receiving at least one person and a suspension device from which the stretcher is suspended.
- the control unit can ensure that the pulling element is always connected to the oscillating element under tension.
- a sufficiently high minimum force can be applied to the tension element, which pulls the tension element towards the drive system (i.e. applies a torque to the shaft so that the pulley is rotated until the tension element is connected to the vibrating element under tension is).
- the minimum force can be lower than the weight of the oscillating element without the person being accommodated in it.
- the control unit can thus simulate the mechanical tensioning element which is used to maintain the tension of the tension element in known spring cradles.
- the control unit of the drive unit generates a pretensioning force (tractive force) to maintain the tension of the tension element only when this is necessary. Therefore, the drive system of the present invention can be operated more efficiently.
- control unit can control the drive unit in such a way that the pretension is applied to the tension element.
- the control unit can control the drive unit in such a way that the pretension is applied to the tension element.
- a direct connection of the pulling element to the oscillating element can be ensured. This is advantageous, for example, when a person is invited into a suitable device on the oscillating element.
- the drive unit can be controlled in such a way that no pretension is exerted on the pulling element. Otherwise, the drive unit would generate a force in the opposite direction to the vibration, which would have a negative impact on the electronics, energy consumption and vibration intensity.
- the pulling element is preferably provided on the drive system in such a way that it extends away from a central point of the drive unit.
- the central point of the drive unit can be the center of gravity of the drive unit.
- the central point of the drive unit in a plan view (in the direction of gravity) of the drive unit can be the center point of the drive unit.
- the drive unit can be designed in such a way that the traction element is guided centrally out of the drive unit.
- the pulling element can be led out of the drive unit at its center of gravity. From the products known from the prior art, the tension element is offset (ie off-centre) to a center of gravity of the drive unit.
- the oscillating element is also arranged eccentrically under a drive unit.
- the drive unit is attached to a cable or a door clip, for example, a pendulum movement is induced by this offset, which results in egg nem swaying of the entire system.
- a swinging pendulum movement does not occur when the tension element is centered in the drive unit.
- the drive unit is designed to enable automatic, hands-free operation.
- this can include two modes. On the one hand, it can be monitored in a stand-by mode as to whether the oscillating element is deflected, which occurs, for example, when a child is inserted. If a deflection is detected, it can be checked whether an oscillating movement can be generated. An oscillating movement can be generated if the oscillating element can oscillate freely. If this is the case, the drive unit can switch to an operating mode. The drive system can thus be activated automatically (i.e. switch to operating mode) as soon as a deflection of the oscillating element is detected.
- a short, minimal force impulse can be applied to the oscillating element at periodic intervals in order to pull the pulling element taut. If the operating state is activated, it can be checked whether an external influence leads to a drastic reduction in the vibration intensity. If such a reduction in vibration intensity is detected, the drive system can switch to a cool-down mode and activate stand-by mode after the system has come to a standstill. This automatic change between different operating modes can be deactivated or activated by a user.
- the control unit can include a single-board computer that is provided with a standardized operating system, such as Linux, so that any standard components can be connected.
- the control unit can have a standardized interface such as a USB connection, an SD card reader or the like.
- access to the provision of plugins can be provided for developers in order to be able to use these standard components to provide additional functionalities of the drive system to provide.
- the control unit can be provided with further control sequences, for example in order to carry out individual vibration patterns.
- the drive system can have a single-track pulley that can be used to wind and unwind the tension element. Because of the single-lane pulley, the pulling element can be prevented from jumping over, as could happen with an uncontrolled multi-lane pulley, for example. According to this, noise and vibrations during operation due to uncontrolled over-jumping of the tension element (e.g. a rope) on the roller are ruled out and safe operation of the drive system can be ensured.
- it is conceivable to provide a cable pulley with a guided track in connection with a cable guide which leads to a constant torque and also improves the measurement accuracy via any rotation sensor, since the rotation speed remains almost constant regardless of the length of the tension element. Consequently, a constant force can be transmitted from the drive unit to the traction element and vice versa. Accordingly, a particularly smooth operation of the drive system can be ensured.
- the drive system can have a powerful motor as a drive unit in connection with a guided track for the tension element, a guide for the tension element and a mechanical lock and a rule's recuperation device.
- a spring weighing system can thus also be implemented without an elastic oscillating element. In this way, the aesthetic appearance of the spring cradle system can be improved and the same functionalities can still be provided as with an elastic oscillating element.
- the drive system can have a mechanical lock that can prevent the pulling element from being deflected.
- the distal end of the pulling member can be prevented from being displaced.
- the distance between the drive system and the oscillating element can be kept constant regardless of the load on the vibrating system. This is advantageous, for example, when a child or baby is about to be loaded into or taken out of the oscillating system.
- the propulsion system can be designed to carry a payload, in that the propulsion system is hung on a stationary mount and, in turn, a vibrating element (e.g. a payload device) is hung over at least the traction element.
- a resilient element e.g. an elastic element
- the propulsion system cannot be designed to carry a payload.
- the drive system can be placed on a frame, for example, and connected to the oscillating element via the tension element.
- the oscillating element can be attached directly or indirectly (e.g. via an elastic element) to a frame or some other device.
- the drive system is preferably arranged above (in relation to the direction of gravity) the vibrating element, so that the prestressing force is applied to the pulling element in the opposite direction to gravity. Nevertheless, the drive system can also be provided below the vibrating element, so that the biasing force is applied to the pulling element in the direction of gravity.
- the longevity can be provided by dispensing with mechanical sensors.
- mechanical sensors For example, only non-mechanical sensors can be used to determine a position of the vibrating element relative to the drive system.
- an energy-optimised oscillating movement can be implemented, since no mechanical sensors dampen the oscillating movement and there are only minimal friction losses.
- the Intelligent control of the control unit can also ensure that only minimal vibration energy is used to ensure that the child/baby behaves calmly.
- the drive system preferably also includes at least one sensor for determining a displacement of the distal end of the pulling element, the at least one sensor preferably being a contactless sensor.
- the mechanical sensor technology installed in the prior art for measuring the vibration speed and direction e.g. via dynamos and servomotors, has a negative effect on the durability of the drive system, since these components can wear out quickly. Furthermore, sustainability is negatively influenced, since the production of these components costs energy and dynamos in particular dampen the oscillating movement and thus require more traction. In addition, noises are generated by mechanical components, in particular whirring operating noises from servomotors.
- a non-mechanical sensor can be used which can measure the displacement of the distal end of the pull element (ie a movement of the pull element).
- This can be an optical movement sensor, which can optionally measure a rotation of a shaft of the drive unit and/or a speed of the pulling element.
- other sensors can also be used for the measurement, such as ultrasonic sensors or electromagnetic sensors (eg Hall sensors).
- the sensors can measure the movement of the tension element directly on the tension element itself, on the shaft of the drive unit, directly in the motor, on the roller or on an additional component such as a pole wheel that rotates together with the shaft.
- a 3-phase motor which has integrated sensors, can be used as the motor, for example.
- the drive unit can be an actuator that is controlled by the control unit based on a control logic.
- the control unit can receive and further process sensor data (ie measured values) from the at least one sensor.
- the control unit can issue control commands with which the drive unit can be controlled.
- a standardized single-board computer preferably a Raspberry Pi, can be used as the control unit, which can control the drive unit and record and process the sensor data.
- other controllers can also be used as the control unit.
- the traction force of the drive unit when the drive system is started, the traction force of the drive unit must expend more energy in order to set the oscillating element in vibration than is necessary to maintain an oscillating movement of the oscillating element, since the entire weight of the oscillating element must be moved against the force of gravity .
- the problem is that excessive tensile force with a low weight of the vibrating element can lead to jerky, unintentionally strong acceleration or to unintentionally exceeding the permissible oscillation amplitude.
- the control unit can therefore be designed to control the drive unit at very short time intervals (a few milliseconds) in order to influence a movement of the pulling element.
- the displacement of the distal end of the traction element can be measured via the at least one sensor and the control of the drive unit can be adjusted based on this measurement data. Accordingly, the traction of the drive unit can be actively controlled. Furthermore, you can initially start with a small tractive force (for example 10% of the maximum tractive force or the maximum power of the drive unit).
- the drive unit can have an output of 2 W to 10 W.
- the drive unit can be operated with 12 V direct current. Efficient operation of the drive unit can thus be ensured.
- the power of the drive unit is preferably between 3 W and 5 W. A power of 3.8 W has proven to be particularly efficient (ie 0.6 A at 12 V DC).
- the traction can then be increased for a long time until a deflection is measured via the at least one sensor.
- the relationship between the actual and desired oscillating amplitude can be checked and the control of the drive unit can be adjusted by the control unit so that the desired oscillating amplitude is achieved.
- the desired minimum number of vibration amplitudes until the desired vibration intensity is reached can be stored as a configuration parameter in a memory of the control unit.
- the control unit can control the drive unit in such a way that the desired vibration amplitude is reached very gently or in such a way that the desired vibration amplitude is reached quickly.
- the drive unit can therefore be adapted to any requirements and controlled individually by the control unit.
- control unit can be designed to initiate actions (i.e. to control the drive unit) and to check a result thereof (i.e. the vibration that has occurred) whether this corresponds to the expected result.
- conclusions can be drawn, for example, by artificial intelligence or a rule-based system, which can be displayed to the user and/or can lead to an adjusted control by the control unit. Damage to the drive system and/or external disruptive factors can thus be detected early and the user informed (for example a defect in the tension element, a foreign body in the swing area, resistance during compression, etc.).
- the drive system can have a so-called "cool-down” functionality, which dampens the oscillating movement when it is switched off by accelerating the amplitude in the opposite direction and using the power of the drive unit to prevent post-oscillation. To do this, you can specify how many swinging movements should be carried out in order to stop the swinging movement.
- the drive system can be controlled by the control unit according to a stand-by functionality or hold functionality, in which the drive unit is controlled in such a way that the distance between the oscillating element and the drive system remains as constant as possible in order to load and unload a person to simplify in the vibrating element.
- a movement of the pulling element can be detected and the drive unit can be controlled in such a way that a pulling force is generated in the opposite direction.
- control unit can have an emergency stop functionality that can be triggered via a dedicated switch, a control element and all control elements connected via the Internet, such as voice assistants, apps, etc.
- This emergency stop function uses the maximum power available from the drive unit to stop the swinging motion as quickly as possible. Operation of the drive unit can thus be ended as quickly as possible in an emergency situation.
- the drive system further comprises an electronic shutoff device, wherein the control unit is designed to regularly send operating signals to the shutoff device, and wherein the shutoff device is switched off to automatically interrupt the power supply to the drive unit if it does not have any operating signals receives.
- the drive system may have an electronic shutoff device or emergency stop assembly (e.g., a relay) that is configured to automatically shut off power to the motor when signals (e.g., from a signaling unit) cease be received.
- the electronic shutdown device can be part of the control unit. This is to protect the motor (ie, drive unit) from burning out.
- control software of the control unit has a malfunction or "gets stuck" or a single-board computer provided in the control unit shows a defect during operation while voltage is applied to the motor.
- the drive unit and/or the control unit can be designed in such a way that signals are sent to the electronic switch-off device during operation (for example by a signaling unit) so that the power is not switched off.
- This emergency shutdown can also be initiated by the control unit if the sensor values indicate a system fault that makes further operation no longer possible, for example if the tension element is torn or blocked.
- Operating signals can be, for example, operating commands or standardized signals that are sent at a specific time interval. Thus, operational safety can be increased.
- control unit can be designed (for example by means of control software) to continuously check the sensor values and/or outgoing control signals. If there are deviations from the intended behavior, a fault can be logged. Operation-inhibiting faults, such as a torn or blocked tension element, can be distinguished from operation-restricting faults, such as reduced engine performance.
- the control unit can be designed to communicate such faults to a user in the form of notifications (for example using an app, housing LED, etc.).
- the drive system can have a force sensor which is designed to detect the force applied to the pulling element.
- the force sensor can be a strain gauge, a piezo force transducer or the like.
- a force acting on the tension element can be measured.
- a change allows the control unit to deduce different states of the oscillating element.
- an abrupt increase in the force acting on the pulling element can result in snagging or an unwanted external Talk intervention in the oscillating movement of the oscillating element.
- the force sensor can be used to determine whether the tension element is sagging or is connected to the oscillating element with tension. This is the case when the pretensioning force applied by the drive unit can be measured with the force sensor. Then the control unit can determine that the pulling element is connected in tension to the vibrating element.
- control unit is designed to control the drive unit on the basis of the force detected by the force sensor.
- the control unit can react based on the information obtained by the force sensor. For example, in the event of an abrupt increase in the tensile force in the traction element, it can stop the operation of the drive unit in order to avoid possible damage. In addition, a flyer can be output to an interface or output device. Likewise, the control unit can stop the operation of the drive unit and/or issue an alarm in the event of an abrupt drop in tension in the tension element. Furthermore, the information about the force acting in the pulling element can be used to check whether the pulling element is stretched or is sagging. As soon as the control unit recognizes that the tension element is prestressed, it can assume that the tension element is under tension and is therefore not sagging.
- the biasing force is less than 15% of the maximum power of the drive unit, preferably less than 10% of the maximum power of the drive unit, and more preferably less than 8% of the maximum power of the drive unit.
- the pre-tensioning force can be greater than the force resulting from the tension element's own weight. As soon as the pretensioning force is greater, the tension ment to be strained. In this case, a force resulting from the weight of the oscillating element and any person accommodated therein must not be exceeded, since the prestressing force is only intended to tension the tension element and not to move the oscillating element.
- the maximum power of the drive unit can result from the intended use of the drive unit. If relatively heavy objects and/or people are to be made to vibrate, the drive unit can have more power. At the same time, however, the pulling element must also be of correspondingly stable design in order to be able to carry a relatively heavy load.
- the tension element can be reliably pretensioned, so that sagging of the tension element can be avoided.
- This also applies to the case in which the pulling element runs at least partially at an angle to the vertical.
- a value less than 10% of the maximum power is particularly advantageous when the tension member is vertical since less force is then required to tension (ie, pull straight) the tension member.
- the range of less than 8% offers particular advantages when using the drive unit in spring cradles for children or babies, since the spring cradle can be operated particularly efficiently and with little noise.
- this pre-tension is sufficient for a tension element that is often of a filigree design.
- the control unit is preferably also designed to control the drive unit in such a way that the oscillating element executes a predetermined oscillating movement.
- a microcontroller-based control of the control unit enables more complex vibration patterns than just a uniform, permanent vibration movement. For example, a vibration pattern similar to that experienced when driving a car can be imitated. Oscillation can be prevented by the stop function, which dampens the oscillating movement until it comes to a standstill and suppresses oscillation through manual intervention. Reaching the desired vibration intensity can be achieved algorithmically by varying the application of force in for a desired duration (i.e. possibly quickly) and then maintained at a level.
- the control unit can detect a varying load in the vibrating element (e.g. through the above force sensor and/or by measuring an amplitude of the vibrating element) and control the drive unit accordingly so that the applied force is applied to the payload (i.e. to the weight of the vibrating element and any therein admitted persons) is agreed.
- the control unit can also detect operation outside a permissible oscillation range and then issue a warning and/or an emergency stop.
- the control unit can measure the vibration deflection. If the vibration deflection is plotted on a Y-axis and the time on an X-axis, a harmonic vibration movement can be mapped in a curve based on a sine curve. The vibration speed can be highest when crossing the equilibrium point (i.e. the point of rest of the vibration-free state) and decrease the closer it gets to the minimum or maximum deflection (i.e. the reversal point).
- the control unit can use the knowledge of the oscillation curves to activate the simulation of the tension element described above shortly before the reversal point is reached, so that the tension element remains constantly connected to the oscillating element under tension over the entire duration of the oscillating movement.
- control unit can measure a deviation from the expected vibration deflection in order to adapt or switch off the control of the drive unit. For example, the control unit can determine when the vibration profile deviates from the sine curve profile, for example if no measured values are recorded at the top reversal point. Furthermore, the control unit can be designed to measure a deviation of the actual oscillating movement from predetermined complex oscillation patterns (e.g. simulation of a car journey) and to control the drive unit according to the complex adjust the vibration pattern. In this case, the set force is too large in relation to a spring used (as an example of a resilient element) and the weight of the vibrating element, and the spring reaches a state in which it can no longer compress. This undesired event can be recognized by the control unit and corrected by automatically reducing the maximum force exerted by the drive unit.
- predetermined complex oscillation patterns e.g. simulation of a car journey
- a user can also control the intensity of the oscillating movement via an interface.
- the user can vary the intensity using a controller (plus/minus rocker switch, potentiometer, control via a mobile app or an electronic control panel).
- the control unit can detect whether a lower or upper limit has been reached and prevent operation outside of these ranges.
- the lower limit of an oscillating movement is given when harmonic oscillation is no longer possible because the movement would be so small that it would no longer be perceived as an oscillation or the detection accuracy of the control unit and/or the sensors would be undershot, see above that they can no longer measure any vibration movement.
- the upper limit is reached when, as described above, no upper reversal point can be measured. In this case, the force applied by the drive unit can be reduced by the control unit to such an extent that the upper limit reaches a harmonious oscillating movement.
- the oscillating movement can be controlled via slide or rotary controls as well as rocker switches (+,-) on the drive system or by corresponding visualizations on the surface of a touch screen or an app.
- the user can set the vibration intensity in an interval of the minimum and maximum vibration intensity.
- the user can set the predetermined swinging movement. If the user sets the controller to any value, a small force is first applied and measured, which what effects the force has on the vibration. The force is increased at fixed time intervals (e.g. in 0.5 s or 5 ms steps) until the control unit can detect a deflection. Then the control unit can determine one of the weight of the vibrating element and/or characteristic values of a spring.
- the force control is successively adjusted until the vibration amplitude has reached the set value. Ergo, the force increases at the beginning until the oscillating element starts to move and the closer the oscillation comes to the set intensity, the lower the force becomes until, when the set oscillation intensity is reached, it only contributes to maintaining the oscillating movement.
- the drive unit is preferably designed in such a way that it can apply a variable force to the pulling element.
- the drive unit can thus be designed to variably apply a force to be applied to the tension element over an oscillation cycle.
- the total force per swing can be varied or constant over the entire upward movement.
- a lower current supply is applied at the extreme point of the oscillating movement (e.g. at the turning point of the oscillating element) than at the apex of the oscillating movement, where the speed is highest.
- the control unit can also regulate the intensity automatically. Thus, initially a minimal oscillating movement can be effected in order to require the lowest possible energy consumption. As soon as the control unit receives information, for example about other sensors (such as a shock sensor or a Microphone) picks up, the vibration intensity can be increased or, conversely, reduced. Thus, for example, when using the drive system in a spring cradle for children, it is possible to react to restless behavior on the part of the child and automatically adjust the operation of the drive unit. This is based on the assumption observed in practice that children fall asleep more easily at higher vibration amplitudes. Furthermore, if the sensors detect restless behavior on the part of the child, a notification can be sent to a smartphone, for example as a push notification.
- a smartphone for example as a push notification.
- control unit can implement any other movement pattern (eg oscillating pattern), which can be represented by up and down movements, by controlling the drive unit.
- An upward movement is limited by the fact that the load of the oscillating element cannot be further tightened against gravity by a maximum tensile force of the drive unit or an optionally provided elastic element is fully deflected or fully compressed.
- the downward movement reported is determined by the maximum deflection of the spring, which results from the installed safety cable of a spring or by the maximum length of the tension element.
- the maximum upward acceleration is determined by the maximum traction of the drive unit, the maximum downward acceleration by gravity.
- the maximum damping of a downward movement is determined by the maximum traction of the drive unit.
- the drive unit can take into account all available sensor data in order to register an activity of the child in the cradle (e.g. acceleration and Braking impulses that are characteristic of swinging the hips or turning the child). From this, an activity index (for example 0-5) can be calculated, which provides an indication of the child's restlessness.
- an activity index for example 0-5
- the user can confi gure the value of the activity index from which he would like to be notified - for example, to be able to be there in time when the child wakes up. Furthermore, the user can configure that audio files or light shows are played from a certain activity index.
- the output means can also be controlled by the control unit in order to be able to realistically simulate situations together with the movement patterns.
- a car journey can thus be simulated.
- the drive system can communicate via an interface with an app that allows the user to record a car journey.
- the app can record vehicle noises, vibrations and brightness profiles (e.g. caused by passing lanterns).
- the user can select parts of the recording or hide measurement data such as brightness and transfer them to the drive system. This can play back this profile in that the control unit controls the drive unit and/or the output means accordingly in order to simulate vibrations, noise and/or light profiles (e.g. from lanterns passing by).
- the control of the drive unit i.e. all actions (on, off, faster, slower, ...), the playing of movement patterns, can take place via any connected or connected interfaces (interaction mechanisms), such as a touch display, a mobile App or integration with language assistants (e.g. Alexa or Siri). These interaction mechanisms can also be used to communicate feedback, information, and notifications.
- the drive system preferably has an energy store which is designed to supply the drive unit and the control unit with energy.
- the drive unit can have a built-in energy store (for example a rechargeable battery) in order to ensure wireless operation.
- a built-in energy store for example a rechargeable battery
- the control unit can be designed to adapt the vibration intensity to the remaining battery capacity in such a way that the desired residual vibration duration, which can be set using a timer, for example, is achieved as far as possible.
- the drive system is preferably controlled via a mobile app, which communicates with the drive system via Bluetooth or WLAN.
- a simple coupling via Bluetooth is provided, in which the coupling mode of the drive system can be activated by pressing one or more operating elements on the drive unit or a touch display.
- a touch display for controlling the drive system can be removed from the drive system so that it can be arranged in an ergonomic position. It can be connected to the drive system via cable or radio.
- the drive system includes at least one retractable element that connects the drive system to the oscillating element.
- the recoverable element may be a spring or other element capable of elastic deformation.
- the elastic element can deform when a load is applied and move back to the starting position after the load has been removed.
- Elastic elements can be characterized by their spring constant, for example.
- the reboundable element can be defined by a prestressing force and/or a number of installed springs.
- different springs can be used with a biasing force of 5N per spring and different spring constants. The resulting spring deflection in connection with the loading force results from the spring constants. The spring constant results from the loading force and the resulting spring deflection.
- the drive system can be operated with different elastic elements.
- the springs can be used by cumulation or substitution between the drive system and the oscillating element. Different springs can, for example, be assigned different weights that are to be accommodated in the oscillating element (e.g. basic spring 3-5 kg, each additional spring +1 kg).
- the control unit can recognize which springs are used based on the applied tensile force in connection with the amplitude deflection and vibration frequency.
- the control unit can also determine whether the springs used match the payload. In this case, an individual specification of an optimal oscillating movement together with a tolerance range can be stored in the control unit. If there is a deviation, depending on the degree of the deviation, the user is informed (flashing LED, notification in a mobile app (especially push notification), Alexa notification, etc.) and, if necessary, the refusal of operation .
- the user can add other accessories (e.g. more springs) and other functions. To do this, the user can link his drive unit to his profile, which can be stored on an operator's website.
- accessories e.g. more springs
- the user can link his drive unit to his profile, which can be stored on an operator's website.
- the control unit is preferably designed to automatically detect properties of the retractable element and to control the drive unit based thereon.
- the recoverable element can be varied for different loads that may occur on the vibrating element.
- the control unit can be designed to use different resettable Recognizing elements and determining their parameters. These parameters, in particular the spring constants, can then be stored by the control unit as configuration parameters and taken into account when controlling the drive unit.
- different resettable elements can be used without it being necessary to manually enter parameters of the new resettable elements into the drive system.
- the drive system in particular the control unit
- the drive system can automatically recognize an element capable of being reset and its parameters and can automatically adapt the operation accordingly.
- use of the drive system can be simplified.
- the spring constant (spring hardness) or the spring characteristic can be used as a parameter of the element capable of restoring (for example a spring). These describe the relationship between deformation (displacement s or angle cp) and force F or torque Mt. Like Flooke's law on which it is based, the spring characteristic is usually linear to a good approximation and can in this case be characterized by a spring constant (as its gradient). will. According to an aspect of the invention, a recoverable element having a non-linear characteristic can be used. It was found here that, particularly when the drive system is used to drive a baby spring cradle, a non-linear characteristic leads to an oscillating pattern which quickly calms the child accommodated in the oscillating element.
- the drive system preferably includes a recuperation device which is designed to recover energy from the oscillating movement of the oscillating element.
- the drive system can preferably include a drive unit with a guided track for the traction element, a guide for the traction element and a mechanical lock and the recuperation device.
- the recuperation device can be an electric machine that is driven by the traction element when the vibrating element moves away from the drive system. In other words, the recuperation device can be driven when the oscillating element is moved by the force of gravity. In this case, an elastic oscillating element can thus be dispensed with.
- the drive system can be implemented in a more compact manner, since no returnable element has to be connected to the drive system and the oscillating element.
- a spring weighing system comprising: one of the above drive systems, which can be arranged in a stationary manner, and an oscillating element for accommodating at least one person, the oscillating element being attached or attachable to the traction element.
- the oscillating element can comprise a stretcher or cradle and a suspension element, wherein the stretcher or cradle can be a cloth or a rigid bed which is suspended or can be suspended from the suspension element. At least one person (e.g. a child or baby) can be accommodated in the stretcher.
- the spring weighing system can be equipped with an inclination sensor. The inclination sensor is preferably arranged on the oscillating element or the pulling element.
- the control unit can thus acquire information about the position of the oscillating element and control the drive unit on the basis of this information.
- the spring weighing system can comprise a deflection roller which is attached to a frame on which at least the oscillating element is suspended.
- the tension element can be guided over the deflection roller and connected to the drive unit and to the oscillating unit, so that a force vector of the tension element is aligned at an angle to the vertical.
- the force vector transmitted from the pulling element to the oscillating unit is preferably inclined at an angle of approximately 45°.
- a rocking oscillation can thus advantageously be initiated.
- the drive system can be fixed to a stationary point (eg a door frame or a rack).
- the spring weighing system can have a fastening mechanism.
- the oscillating element can be attached below the drive system with the tension element and optionally with a resettable higen element to be connected to the drive system.
- the inclination sensor supplies input data in order to achieve a harmonious rocking movement by means of a corresponding force control.
- the control unit can also carry out a cool-down, stand-by and emergency stop function during the rocking movement.
- the cradle system can be used as a baby cradle system. Furthermore, the hammock system can also be used by adults.
- the spring weighing system preferably comprises at least one sensor which is designed to detect a state of the at least one person accommodated in the oscillating element, with the control unit being designed to control the drive unit on the basis of the detected state and/or the state of the output at least one person to an output unit.
- the sensor can include a thermal imaging camera, for example, which detects that the person accommodated in the vibrating element is too cold or too warm and informs a user. Furthermore, the sensor can include a vibration sensor and/or a microphone, so that an activity of the person can be recorded.
- the control unit can control and adapt the operation of the drive unit on the basis of this sensor data. Furthermore, the control unit can record and store different reactions of the person to different vibration patterns and thus generate empirical values as to which vibration pattern and which reactions of the person occur most frequently. For example, in the case of babies, the control unit can determine which swinging pattern leads to calming down or putting the baby to sleep. Furthermore, the control unit can determine an average sleep duration of the person using empirical values and/or the sensor data and display it to a user.
- the user can use push notifications or Alexa notifications about states and/or Events to be expected are informed so that the user can be at the spring cradle system in good time, for example before a baby wakes up.
- the sensor can include a moisture sensor which, for example, knows that a baby's diapers are full. This information can also be passed on to a user, for example via a display on the spring weighing system and/or via an interface, in particular wireless, on a mobile device.
- the control unit can include an artificial intelligence that can monitor all sensor data in order to gain knowledge about the state or behavior of the person accommodated in the oscillating element and to initiate actions.
- the artificial intelligence can be, for example, an artificial neural network that can be trained by using the information about the oscillating movement of the oscillating element as input data and using the reactions of the person accommodated in the oscillating element as output data.
- the neural network can be trained individually for each user by constantly being retrained or untrained when using the spring cradle system. In this way, the control of the spring weighing system can be individually adjusted.
- the control unit can use rule-based technology or artificial intelligence to determine the optimal parameters for automated operation, taking into account the boundary conditions that occur, and control the control unit accordingly.
- the automatic operation optimizes the vibration intensity in such a way that it only uses the minimum movement to maintain a good night's sleep. If a child is found to behave restlessly, for example, the vibration intensity can be temporarily (ie temporarily) increased. Furthermore, a higher vibration intensity can be exerted at the beginning of the movement period.
- the control unit can learn movement patterns that lead to a particularly peaceful sleep for the child. The learned movement patterns can be used for short sleep phases (afternoon nap) and long sleep phases (at night) can be distinguished.
- the above-mentioned activity index can represent a data basis for the learning automatic rule operation.
- the automatic operation can reduce a child's potential habituation to the swinging movement.
- the automatic operation can also be started in a mode in which the movement intensity is successively reduced in order to encourage the child to get used to the swinging movement.
- control unit can send sensor data anonymously to a central internet service in order to query empirical values from installations of other spring cradle systems for similar sensor data in order to accelerate your own learning (through more available training data).
- a method for simulating an elastic tension element comprising the following steps: a) providing a drive system which has a tension element with a distal end which is designed to be attached to an oscillating element, and a drive unit configured to increase and/or decrease a free length of the traction element in order to change a position of the vibrating element relative to the drive system, b) operating the drive unit such that a pretension is applied to the tension element is applied to simulate an elastic tension element, c) determining that the distal end of the tension element is not moving towards the drive unit, and d) ending the simulation of the elastic tension element.
- a mechanical tension element can thus be dispensed with, since the inventive method can be used to simulate such a tension element by selectively controlling the drive unit.
- the same Advantages are achieved as can be achieved by the above device and a particularly quiet and efficient operation of a spring cradle.
- the method further comprises the following steps: e) operating the drive unit to initiate an oscillating movement of the oscillating element so that the distal end of the traction element moves away from the drive unit, f) determining that the distal end of the traction element is no longer moving moved away from the drive unit, and g) operating the drive unit so that the preload is applied to the tension member to simulate an elastic tension member.
- FIG. 1 shows a schematic representation of a drive system according to an embodiment of the present invention in use with a spring weighing system
- FIG. 2 shows a schematic representation of a drive system according to a further embodiment of the present invention in use with a spring weighing system
- FIG. 3 shows a schematic representation of a drive system according to a further embodiment of the present invention in use with a spring weighing system
- Fig. 4 is a schematic representation of a drive system according to a further embodiment of the present invention in use with a spring weighing system.
- FIG. 5 shows a schematic representation of a drive system according to a further embodiment of the present invention in use with a spring weighing system
- Fig. 6 is a schematic representation of a drive system according to another embodiment of the present invention in use with a spring weighing system.
- Fig. 7 is a schematic representation of a drive system according to another embodiment of the present invention in use with a spring weighing system
- FIG. 8 is a schematic representation of a cradle system according to an embodiment of the present invention.
- the cradle system includes a drive system 2 according to another embodiment of the present invention.
- the spring cradle system 100 can be hung in a fixed position with a fastening 1 .
- the spring cradle system 100 can be hung from a flake on a ceiling, a door frame, and/or a rack.
- the drive system 2 is connected to the mount 1 in such a way that the drive system 2 hangs below the mount 1 in the operating state.
- the spring cradle system 100 also includes a tension element 4 and a restorable element 3.
- the restorable element is a spring in the embodiment shown in FIG.
- the recoverable element is an elastic element comprising a stretchable material (such as rubber or elastomer).
- a stretchable material such as rubber or elastomer
- the tension element and the elastic cal element 3 are both attached to the drive system 2, so that they hang under the drive system 2 in the operating state.
- a suspension element 5 is connected, which serves as part of the oscillating element.
- a stretcher or cradle 6 is arranged (for example suspended) on the suspension element 5, in which a person (for example a baby, child) can find space.
- the stretcher 6 and the suspension element 5 together form the oscillating element.
- the pulling element 4 can be shortened by the drive unit 21 accommodated in the drive system 2 (see FIG. 2) in such a way that a distance between the oscillating element and the drive system 2 is reduced.
- the tension element is rolled up and down on a roller 7 (not shown in FIG. 1) in order to vary the distance between the drive system 2 and the oscillating element.
- the oscillating element can again move away from the drive system 2 due to the force of gravity.
- the pulling element 4 does not exert any force on the oscillating element.
- the elastic element 3 deforms elastically and thereby slows down the movement of the oscillating element until it comes to a standstill.
- the elastic element 3 exerts a force on the oscillating element that opposes the previous movement, so that the oscillating element moves back toward the drive system 2 in a return movement.
- the pulling element 4 does not exert any force on the oscillating element. An oscillation of the oscillating element can thus be initiated.
- a tensioned tension element is provided by a mechanical tensioning element.
- the mechanical tensioning element is usually a spiral spring on a shaft of the drive unit 21.
- this mechanical clamping element is simulated by a targeted operation of the drive unit 21.
- a free length of the tension element 4 is thus shortened during an upward movement of the oscillating element (ie during a movement towards the drive system 2) such that the tension element is always tensioned between the drive system and the oscillating element. This ensures that when the drive unit is operated, the movement of the oscillating element can be acted upon directly. In this way, complex vibration patterns can also be implemented by operating the drive unit 21 in a targeted manner. In the same way, a harmonic oscillation that is kept constant, for example, can also be provided.
- FIG. 2 is a schematic representation of the cradle system 100 according to another embodiment of the present invention. In contrast to Fig.
- a housing 9 of the drive system is cut in FIG. 2 so that the elements shown in the drive system 2 are visible.
- a movement sensor 8 is arranged in the housing 9 of the drive system.
- the movement sensor 8 is designed to detect a movement of the tension element 4 .
- the movement sensor 8 can detect a movement amount and a movement direction.
- a control unit 22 which is also arranged in the drive system, can thus infer the position of the oscillating element relative to the drive system 2 .
- the drive unit 21 can be controlled with great precision, on the one hand to realize a predetermined oscillation pattern and on the other hand to always keep the pulling element 4 under tension.
- the pulling element 4 is guided through the sensor 8 .
- the sensor can be provided with two measuring rollers, for example, between which the tension element is clamped. Due to the rotation of these measuring rollers, the sensor can deduce a movement of the pulling element 4 .
- 3 is a schematic representation of the cradle system 100 according to another embodiment of the present invention.
- the embodiment shown in FIG. 3 corresponds to the embodiment shown in FIG. 2, with the difference that the motion sensor 8 in the present embodiment is a non-mechanical sensor.
- the sen sor 8 can be an optical or an electromagnetic sensor.
- the sensor 8 can be directed, for example, at a magnet wheel 12 that is mounted on the shaft of the drive unit 21 .
- the magnet wheel 12 can have regular savings that can be detected by the sensor 8 .
- the flywheel can have magnetized elements that can be perceived by the sensor 8 .
- the sensor 8 can be a fall sensor.
- the present embodiment has, in addition or as an alternative to the sensors of the above embodiments, further sensors 14 for recording information from a person accommodated in the stretcher.
- the sensors 14 can include a vibration sensor, for example. A movement of the person in the stretcher 6 can thus be detected.
- the control unit 22 can then adjust the operation of the drive unit 21 to the vibrations detected.
- the vibration intensity can be increased or, conversely, reduced. This is based on the assumption observed in practice that children fall asleep more easily at higher vibration amplitudes. If the sensors 14 detect restless behavior on the part of the person, a notification can also be sent to a smartphone, for example as a push notification.
- 5 is a schematic representation of the cradle system 100 according to another embodiment of the present invention. The present embodiment differs from the previous embodiments in that no elastic element is provided here, but the oscillating element is connected to the drive system 2 only by means of a tension element 4 . Furthermore, the drive system 2 has a roller 15 with a guide 16 for the gelement 4 .
- the tension element 4 is specifically wound onto the roller 15 by the guide 16 .
- the roller 15 is driven by a drive unit (not shown in Fig. 5) as in the above embodiments.
- a recuperation device 18 is provided in the drive system 2 and is connected to the shaft on which the roller 15 is arranged.
- a movement sensor 8 in the form of a dynamo is connected to the shaft.
- this embodiment has a mechanical locking element 17, which is designed to hold the pulling element 4 when, for example, no movement of the oscillating element is desired.
- FIG. 6 is a schematic representation of the cradle system 100 according to another embodiment of the present invention.
- This embodiment corresponds to the embodiments shown in FIGS. 2 to 4 with the difference that the movement sensor is aimed directly at the pulling element 4 and can register a movement of the pulling element 4 .
- the sensor is an ultrasonic sensor.
- this non-mechanical sensor has the advantage that operation of the drive system 2 is very quiet and wear-resistant.
- FIG. 7 is a schematic representation of the cradle system 100 according to another embodiment of the present invention. This embodiment corresponds to the embodiments shown in FIGS. 2 to 4 and 6 with the difference that the movement sensor is designed as a dynamo which is located on the same shaft as the roller 7 and the drive unit 21. Consequently, movements of the roller 7 and thus of the tension element can be easily detected.
- the tension element 4 is deflected by means of two deflection rollers, so that the tension element 4 runs at an angle of approximately 45° relative to the florizontal from the drive system 2 to the suspension element 5 .
- the stretcher 6 of the present embodiment has an inclination sensor.
- the control unit 22 can detect information about the position of the stretcher 6 and control the drive unit 21 on the basis of this information.
- the deflection rollers are attached to a frame on which at least the oscillating element is suspended. In this way, an oscillating movement can be initiated by actuating the to gelements 4 .
Landscapes
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Transmission Devices (AREA)
- Rehabilitation Tools (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Actuator (AREA)
- Toys (AREA)
Abstract
Description
Claims
Priority Applications (5)
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EP22724014.0A EP4326117A1 (de) | 2021-04-20 | 2022-04-20 | Antriebssystem, federwiegensystem und verfahren zur simulation eines elastischen spannelements |
AU2022260463A AU2022260463A1 (en) | 2021-04-20 | 2022-04-20 | Drive system, swing hammock system, and method for simulating an elastic tensioning element |
CN202280035713.4A CN117320593A (zh) | 2021-04-20 | 2022-04-20 | 驱动系统、弹簧摇篮系统和用于仿真弹性张紧元件的方法 |
US18/555,595 US20240206643A1 (en) | 2021-04-20 | 2022-04-20 | Drive system, swing hammock system, and method for simulating an elastic tensioning element |
CA3215921A CA3215921A1 (en) | 2021-04-20 | 2022-04-20 | Drive system, swing hammock system, and method for simulating an elastic tensioning element |
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DE102021110005.4 | 2021-04-20 | ||
DE102021110005.4A DE102021110005A1 (de) | 2021-04-20 | 2021-04-20 | Antriebssystem, Federwiegensystem und Verfahren zur Simulation eines elastischen Spannelements |
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US (1) | US20240206643A1 (de) |
EP (1) | EP4326117A1 (de) |
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CA (1) | CA3215921A1 (de) |
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DE102022131048A1 (de) | 2022-11-23 | 2024-05-23 | Explicatis Gmbh | Federwiegenaufhängung, Federwiegensystem und Verfahren zum Verbinden einer Aufnahmevorrichtung mit zumindest einem Federelement |
DE102022131044A1 (de) | 2022-11-23 | 2024-05-23 | Explicatis Gmbh | Seilrolle, Seilrollensystem und Verfahren zum Aufwickeln und Abwickeln eines Zugelements |
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CN108703584B (zh) | 2018-04-28 | 2019-08-02 | 广州福悳家贸易有限公司 | 能量补偿装置及摇篮机 |
-
2021
- 2021-04-20 DE DE102021110005.4A patent/DE102021110005A1/de active Pending
-
2022
- 2022-04-20 AU AU2022260463A patent/AU2022260463A1/en active Pending
- 2022-04-20 US US18/555,595 patent/US20240206643A1/en active Pending
- 2022-04-20 EP EP22724014.0A patent/EP4326117A1/de active Pending
- 2022-04-20 CA CA3215921A patent/CA3215921A1/en active Pending
- 2022-04-20 CN CN202280035713.4A patent/CN117320593A/zh active Pending
- 2022-04-20 WO PCT/EP2022/060396 patent/WO2022223602A1/de active Application Filing
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US20050283908A1 (en) * | 2004-06-28 | 2005-12-29 | Sui-Kay Wong | Baby bouncer actuator and related systems |
US20080217974A1 (en) * | 2005-11-03 | 2008-09-11 | Graco Children's Products Inc. | Child Motion Device |
WO2010098702A1 (en) * | 2009-02-25 | 2010-09-02 | Tactiqa Technology Ab | Infant motion and monitoring system |
EP3197323B1 (de) | 2014-07-29 | 2018-11-07 | Valeriy Luginin | Vorrichtung zur erzeugung einer wippbewegung an auflagen für babys |
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EP4326117A1 (de) | 2024-02-28 |
CN117320593A (zh) | 2023-12-29 |
AU2022260463A1 (en) | 2023-10-26 |
US20240206643A1 (en) | 2024-06-27 |
CA3215921A1 (en) | 2022-10-27 |
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