EP4327447A1 - Verfahren, system und elektronisches modul zum ausgleich einer gewichtskraft eines gegenstands - Google Patents
Verfahren, system und elektronisches modul zum ausgleich einer gewichtskraft eines gegenstandsInfo
- Publication number
- EP4327447A1 EP4327447A1 EP22720641.4A EP22720641A EP4327447A1 EP 4327447 A1 EP4327447 A1 EP 4327447A1 EP 22720641 A EP22720641 A EP 22720641A EP 4327447 A1 EP4327447 A1 EP 4327447A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- motor
- weight
- speed
- traction cable
- electronic module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
- B23B45/02—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor driven by electric power
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B35/00—Methods for boring or drilling, or for working essentially requiring the use of boring or drilling machines; Use of auxiliary equipment in connection with such methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
- B66C13/085—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions electrical
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M13/00—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles
- F16M13/04—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles for supporting on, or holding steady relative to, a person, e.g. by chains, e.g. rifle butt or pistol grip supports, supports attached to the chest or head
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/02—Details of stopping control
- H02P3/025—Details of stopping control holding the rotor in a fixed position after deceleration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Program-controlled manipulators
- B25J9/0006—Exoskeletons, i.e. resembling a human figure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D3/00—Portable or mobile lifting or hauling appliances
- B66D3/18—Power-operated hoists
Definitions
- the present invention relates to a method for compensating for a weight of an object in a system, wherein the object can be attached to a traction cable and wherein the system is set up to perform a compensating process in relation to the weight of the object.
- This compensation process can be carried out by determining a speed of the motor and/or a derivation of the speed of the motor, with a current setpoint being stored in the system as a control variable, preferably when the speed of the motor or its derivation falls below a limit value for a long time.
- the speed of the engine or its derivative corresponds to a weight of the object to be balanced in the context of the present invention.
- a current value required to maintain the first position of the object or a motor torque required for this can be stored in the system and the weight of the object can be compensated for using the previously stored current values or torques.
- the invention relates to a system and an electronic module for carrying out the proposed compensation method.
- tool devices such as chisels, hammer drills, core drills or the like
- tool devices such as chisels, hammer drills, core drills or the like
- Tools are often strenuous and tiring, especially when working with these devices for a long period of time.
- Tools are often heavy and the downward weight of such a tool towards the ground means that work with such tools can only be performed for a limited period of time before a break is required. However, this can delay the progress of work on a construction site, which is undesirable for various reasons.
- Passive assistance systems for example, are known in the prior art.
- an object can be attached to a component of the assistance system, with the object then being held by the assistance system.
- a passive suspension cannot provide sufficient support for the user in some applications.
- the object on which the present invention is based is therefore to overcome the above-described shortcomings and disadvantages of the prior art and to provide a method and a system for compensating for a weight of an object which is particularly easy to handle.
- the system to be provided and the method should effectively and reliably compensate for the weight of an object in different applications and situations. Experts would also appreciate it if the system to be provided could enable not only static but also dynamic support for the system user.
- a further object on which the invention is based is to provide an electronic module as the drive and control unit of such a system.
- a method for compensating for the weight of an object in a system in which the object can be attached to a traction cable, the method being characterized by the following method steps: a) fastening the object to the traction cable, b) determining a speed of the motor and/or a derivation of the speed of the motor, c) determination of a desired current value, d) compensation of the weight of the object using the previously determined desired current value.
- the speed of the motor or its derivation corresponds to the weight of the object that is to be compensated with the proposed method.
- the weight of the object is compensated in particular This is because the previously determined current setpoint is used as the controlled variable.
- this preferably means that the weight of the object is compensated for by the motor current of the motor of the system being regulated to the desired current value.
- the desired current value is determined when the speed of the motor falls below a limit value for a longer period of time.
- a desired current value S is determined in the context of the proposed method.
- that current value is defined as the desired current value at which the speed of the motor or its derivation falls below a previously defined limit value. It is preferred within the meaning of the invention that a current current value is recorded as the desired current value and regulated to this as soon as the object is fastened to the traction cable or suspended from the system.
- the current setpoint is determined in particular when the speed of the motor and/or its derivative falls below a limit value for a defined period of time.
- the desired current value determined in this way is then preferably used to compensate for the weight of the object, with the desired current value representing in particular the controlled variable. The weight of the object is thus compensated in particular by using the previously determined desired current value.
- the motor current assumes a constant value essentially at all times in which the weight of the object is to be balanced.
- the wording that the current setpoint is used "as a controlled variable" is not an unclear term for the expert, because the expert knows that this means regulation to this specific current value.
- a current setpoint value is recorded if the speed of the system motor or its derivative falls below a limit value.
- This current setpoint is then used as the control variable, i.e. it is used for control.
- the desired current value is preferably used in order to compensate for the weight of the object or its weight.
- the speed of the motor of the system correlates with a speed of the traction cable of the system. In other words, there is a link between the motor speed of the system and the speed of the cable. In other words, the speed of the motor corresponds to a speed of the cable of the system.
- position control can be switched to when the speed of the motor of the system exceeds a limit value. It is preferred within the meaning of the invention that the determination of a first position X of the object in The meaning of the invention is preferably referred to as position control. A position controller can advantageously be used for this. It is preferred within the meaning of the invention that the position regulation is completed when a speed of the object or the derivation of the speed of the object assumes the value "zero" for a defined length of time.
- the invention relates to a method for compensating for the weight of an object in a system, in which the object can be fastened to a traction cable, the method being characterized by the following method steps: a) determining a current position of the object , b) determining a speed of the motor and/or a derivation of the speed of the motor, c) storing the current position as a controlled variable in the system if the speed of the motor and/or the derivation of the speed of the motor exceeds a limit value, d) regulation of the current position of the object until a speed of the object is essentially “zero” for a period of time delta t, e1) storage of a current value l_X required to maintain the current position in the system or e2) storage of a current value l_X for maintenance the current position of required torque M_X in the system, f) Au equal to the weight force using the current value l_X stored in step e1 or the torque M_X stored in step
- the weight of the object can be compensated for by controlling the previously determined or stored current and torque data. In this way, in particular, a possibility can be provided of working with the object essentially without any force, since the weight of the object is “taken from” the user of the system as a particular advantage of the invention.
- the method regulates the position of the object to a stored position until the position of the object is constant.
- the wording that a "velocity is essentially 0" preferably means that the velocity of the attached object is less than 10 mm/s, more preferably less than 5 mm/s and most preferably approx. 3.7mm/s. This corresponds to a motor speed value of less than 1 rad/s.
- the invention relates to a system, the system comprising an electronic module with an energy source for supplying the system with electrical energy, a device for winding up the traction cable, a motor for driving the device for winding up the traction cable and a control device.
- the system in particular its control device, is set up to carry out a balancing process in relation to the weight of the object.
- the compensation process preferably represents a control and regulation process in relation to the position of an object attached to the traction cable of the system, it being possible for this control and regulation process to be described by the method steps mentioned above.
- the Be handled compensation process relates in particular to the compensation of a weight of an object in a system, wherein the object can be attached to a traction cable of the system.
- the electronic module can include a transmission that is preferably set up to enable high torques of the motor.
- the motor, the gear and a roller at the output of the gear are located on the user's back, ie in a back area.
- the reel may be part of or form a winding unit.
- the components mentioned can together form an electronic module, in which case the electronic module can also have an energy supply and a control device.
- the traction cable is preferably routed via guides to the front of the user of the system.
- the object can be attached to this traction cable.
- the object can be, for example, a drill or a chisel. It is preferred within the meaning of the invention that the weight of the object can be compensated for by the system, in particular its motor, so that the user only has to expend a little force to move and work with the object.
- a current position of the object is first determined. This can be done, for example, by the object being fastened to the traction cable, as a result of which a current position of the object is defined. In the sense of the invention, however, it can also be preferred that the object is first placed on the ground, attached to the traction cable and brought into a current position by the system. In addition, it may be preferable for an object already attached to the traction cable to be lowered or driven down to the ground and there to be detached from the traction cable.
- the current position within the meaning of the invention can preferably be the original position of the object before it was lowered or lowered. In the context of the invention, it can preferably also be referred to as “first position”.
- the object can then also be moved (back) into its original or another position.
- the object that is already fastened to the traction cable can be detached from the system or the traction cable, with the position at which the system registers the removal of the object being used as the first position within the meaning of the invention becomes.
- the detection of whether an object is attached to the traction cable of the system is preferably carried out by recognizing a change in the speed, such a change in speed being caused in particular by the hanging of an object.
- the attachment of the object to the system can result in an increase in RPM, which is recognized by the system and associated with the "object mounted" information.
- Controlling the position of the object preferably includes a position control, which can be switched hard or soft.
- This setting of the severity of the regulation can be carried out in particular as a function of a speed of the engine of the electronic module of the system or as a function of a derivative of the engine speed.
- a position controller is used to implement the control.
- the position controller can be designed, for example, as a PIDT1 controller or PDT1 controller.
- a current position of the object is stored and then used as a controlled variable in the control and regulation calculation method can be used when the speed of the motor or its derivative exceeds a certain value.
- This value is preferably also referred to as a “limit value” or “switching value”, this limit or switching value being in a range from 40 to 1000 rad/s for the engine speed and 100 to 4000 rad/s 2 for the derivation of the speed of the engine can lie. Of course, values outside of these ranges can also occur.
- This limit can be the same or similar for the first proposed method. However, other values can also come into consideration as limit values for the first proposed method.
- this previously stored current position of the object which is also referred to as the "first position” and with the reference symbol "X" in the context of the invention, is used in particular when the object is attached to the traction cable by a user of the system .
- the weight or the weight of the object can be balanced particularly well.
- the object whose weight is to be compensated for by the proposed system and the proposed method can be picked up lying on the ground.
- the object in this first mode, the object is placed on a surface such as the ground.
- the object can then, for example, using an acquisition or suspension device attached to the traction cable and lifted to a certain height.
- the lifting process can be started, for example, using an input device on the system.
- push buttons, switches or potentiometers can be used to initiate the lifting of the object to a specific height. The use of a potentiometer is particularly preferred when a variable stroke or lifting speed is desired.
- the object which in this embodiment of the inventions is already attached to the traction cable, can be moved downwards in a spatial direction, in particular in the direction of the ground. In terms of this embodiment of the invention, it is particularly preferred that the object is lowered to the ground and then detached.
- the user of the proposed system releases the object from the traction cable and in this way the object from the system removed.
- the recording or suspension device or the pull rope remains in the position that she / it had occupied when the object was removed, so that this position of the recording or hanging device or the pull rope as a controlled variable for the proposed equalization procedure can be used.
- the current setpoint is stored in the system as a control variable.
- the limit or switching value was established before the system was put into operation. For example, it can be stored in the system. This storage can take place, for example, in the control device of the system. Storage means for storing the first or the current position of the object can also be provided in the system. Furthermore, lookup tables or similar means of comparison can be used. It is preferred within the meaning of the invention that the limit or switching values are stored in the system.
- the formulation that the position of an object is used "as a control variable" is not an unclear term for the person skilled in the art, because the person skilled in the art knows that this means a control on this position.
- these method steps are referred to as "storing a current value I_X required for balancing the attached device in the system” or "storing a torque M_X required for balancing the attached device in the system”.
- the current value I_X required for maintaining the first or current position is preferably the output of the position controller or the data and measured values output by it.
- the stored current and torque preferably represent the values required for the system to balance the attached object.
- the stored current value I_X can, for example, correspond to the desired current value of the first proposed method.
- the position controller is set up to allow the object to be moved upwards or downwards by a user. It is preferred within the meaning of the invention that in the case of hard position control, the controller reacts by requesting a higher or lower torque or a higher or lower current when the user tries to move the attached device up or down move. This reaction preferably takes place promptly or immediately after the system has detected the movement of the object.
- the additional force of the user is compensated and the object that is hung on the traction cable of the system remains in place. In soft position control, this demand for more or less torque is fed back proportionally or integrally, changing the position command.
- the changed current value is referred to as DELTAJ and the changed torque as DELTA_M, with the respective difference between the changed value and the initial value being able to be further processed using information technology.
- the current value I_X stored in method step d) or the value M_X for the torque stored in method step d) is subtracted from the respective value DELTAJ or DELTA_M, with the respective difference being integrated , damped integrated and/or Pl-reinforced. This can preferably provide a very soft position control, which allows the user of the proposed system to work with the balanced object only against very little resistance.
- the force that the user has to exert when working with the object whose weight is intended to be balanced by the proposed system can be significantly reduced.
- Tests have shown that the force to be applied by the user can be practically reduced to 0.
- this preferably means that the user only has to apply the force that is required for working with the machine tool, but not a force to hold the machine tool. It is preferred within the meaning of the invention that a size of this resistance can be adjusted with the aid of amplification or amplification control, in which case the amplification or amplification control can be connected upstream of the integrator.
- a difference between the changed current value DELTAJ and the stored current value I_X is integrated, with the setpoint value for the position being able to be corrected as a result.
- the integration can preferably be carried out by the integrator.
- the integrator can be set up to integrate a difference between the changed current value DELTAJ and the stored current value I_X, as a result of which the position setpoint can be corrected.
- the user of the system attaches the object to his pull cable, with the system preferably being in a reset state.
- the system switches to weak or soft position control.
- This fixed position of leveled object can also be referred to as "first position X".
- the first position X of the object preferably corresponds to a certain current value, which is dependent on the weight of the attached object. It is preferred within the meaning of the invention that the current current or torque value is stored and forwarded to the integrator when the state of weak or soft position control is entered.
- the speed w_MOTOR of the motor or its derivative div_w_MOTOR can rise rapidly as a result, with the system preferably being set up to detect an increase or a change in the motor speed or the derivative of engine speed and to switch to a "position control" state.
- the recognition is preferably carried out by a comparison with reference values that were previously determined in tests. When this state is entered, the current position of the object is measured and subsequently adjusted to this. It is preferred within the meaning of the invention that a few sampling steps are carried out when the rotational speed w_MOTOR of the motor falls below a specific, very small value. This very small value can be in a range of, for example, 0 to 0.1 rad/s.
- the system can then return to the weak or soft position control state, where the sampling steps can have a length of 1 millisecond (ms), for example. According to the invention, it is preferred that 10 to 300 scanning steps are carried out. According to the invention, it is preferred that during the sampling steps it is waited to see whether the speed w_MOTOR of the motor has stabilized at the very low level. If this is the case, the changeover to the weak or soft position control state follows.
- the value of the engine speed during the ten sampling steps for example, is always less than a limit value, which can be 0.1 rad/s, for example.
- the system can be in a "pull-down" or "pullj p" state, with a position setpoint changing essentially continuously in these states can be.
- essentially continuous change is not an unclear concept for the person skilled in the art, because he knows that it means, for example, change rates or change steps in a range of 0.05 rad/ms. This advantageously allows the object to be lifted or lowered. As soon as the user stops moving the object down or up, it is preferred in the context of the invention that a small value for the motor speed w_MOTOR or a certain number of sampling steps is reached again waiting until a return to the weak or soft position control state occurs.
- the position controller helps the user of the system to slow down a movement of the object, with the user having to work against a slight, preferably adjustable, resistance of the object.
- This embodiment of the invention is particularly preferred when the object is to be lifted from an underground, with the hanging in particular taking place while the object is still lying on the underground. It can also be used in cases where the object is to be lowered onto a substrate in order to be suspended there.
- the position control is carried out essentially continuously while the object is being worked on or when the object is fastened to the traction cable of the system.
- the data that are determined during the compensation process are preferably used in order to compensate for the weight of the object.
- a new compensation process preferably takes place when another object is attached to the pull cable of the system or the original object is detached and re-attached, for example due to a tool change on the object.
- the transmission of the system which in particular has a gear ratio between 2 and 15 and preferably between 4 and 12.
- the transmission can have a roller at its output, the roller having a diameter in a range from 10 to 200 mm, preferably in a range from 20 to 150 mm and particularly preferably in a range from 40 to 120 mm.
- Tests have shown that a combination of a gear ratio in a range of 4 to 12 and a roller diameter of 40 to 120 mm represents a good compromise so that the system's motor is able to generate a sufficiently large torque on the
- it can be made compact to be used in a body-worn balancing system.
- the motor is an external rotor motor.
- high torques can be achieved at low speeds by using an external rotor motor.
- the motor has a number of poles that is greater than 6. This allows a continuously high torque to be provided. Compensation of user movements:
- forces act on the object as a result of movements by the user, with these forces and their effects on the weight of the object being able to be compensated for by positive or negative changes in the torque of the system's motor.
- the term “positive change in torque” is preferably understood as an increase in torque
- the term “negative change in torque” is preferably understood for the purposes of the invention as a reduction in torque.
- changes in torque can be used to compensate for movements of the user connected to the object via the system. In particular, this can prevent undesired, uncontrolled movements of the object, which may pose a risk to the system user.
- the up and down movement caused by the user moving, in particular running, and the bending movements of the user in a spatial direction forwards or backwards can be compensated for by the proposed system and with the proposed method.
- This is preferably done by additional accelerations that act on the object and affect its weight.
- the object can be subjected to additional accelerations in order to compensate for movements by the user.
- These additional accelerations preferably counteract the movements of the user, ie they are suitable for compensating for the movements of the user. It is preferred within the meaning of the invention that these additional accelerations can be compensated for by positive and negative changes in the torque.
- the proposed system preferably has acceleration sensors that are set up to determine these additional accelerations.
- acceleration sensors are used that can measure acceleration primarily in the Z axis.
- a movement of the object along the Z-axis corresponds to the object moving up and down. This axis is shown, for example, in FIG. 1 as the O or U axis.
- the acceleration sensors are preferably set up to also detect movements of the object in the X and/or Y axis. These movements correspond to lateral movements of the object or movements of the object forwards or backwards.
- yaw rate sensors can be used, which can detect bending movements.
- the rotation rate sensors are preferably set up to detect such bending movements in all three spatial directions X, Y and Z.
- the at least one sensor for detecting the acceleration is arranged in a vertical spatial direction. If the acceleration sensor is not arranged exactly in the vertical direction, it is preferred within the meaning of the invention that a correction factor is used to compensate for this deviation from the vertical spatial direction. In this case two sensors are preferably used.
- the correction factor can preferably be determined as a function of the angle of inclination beta of the bending movement of the user forwards or backwards.
- the vertical direction in space preferably corresponds to a movement of the object along the Z axis (cf. Fig. 1: O and U axis), i.e. preferably an up and down movement of the object.
- the angle of inclination beta is preferably the angle that is enclosed by an imaginary vertical axis, which runs, for example, through the system user and essentially parallel to his spine, and the inclined upper body of the user. For example, if the user leans forward by 20 degrees from the usual straight posture, which is represented by the imaginary vertical axis, then the angle of inclination beta is 20 degrees. In other words, it is preferred within the meaning of the invention that the user's bending movements in a spatial direction forwards or backwards can be described by an angle of inclination beta.
- the angle of inclination beta can be measured by a frequency-based complementary filter of the yaw rate and acceleration measurement, with the frequency preferably being determined in such a way that it effectively dampens the stepping frequency of the user. Tests have shown that the frequency is preferably in a range from 0.4 to 2 Hz in order to achieve particularly good damping of the user's step frequency.
- sensors are used that are set up to detect both a rate of rotation and an acceleration.
- rotation rate is to be understood as the bending speed of the user, ie as the speed at which the user bends forwards or backwards.
- the system comprises at least one sensor for detecting a position of the motor of the balancing device.
- a position of the rotor of the motor can be determined by the sensors if the motor of the device is designed as an electric motor, which preferably comprises a rotor and a stator.
- the at least one sensor for detecting the motor position can preferably be designed as a Hall sensor.
- the system is set up to determine a speed of the motor. This motor speed is preferably determined as a function of the determined position of the motor or its rotor. According to the invention, it is particularly preferred that a motor speed is determined and made available to the balancing device for controlling or setting the position of the attached object.
- the motor speed can preferably be determined using the Hall sensor. It is preferred within the meaning of the invention that the balancing device is set up to determine that motor current that is required to regulate the position and/or the weight of the suspended object. This determination of the motor current can take place in particular as a function of a set or determined operating mode of the system. It is preferred within the meaning of the invention that the balancing device is able to recognize whether a load is attached to or suspended from the system. This detection is preferably based on the engine speed, which can be determined, for example, with the Hall sensor.
- the motor current required to keep the object suspended is determined.
- the phrase “hold in suspension” preferably means that a weight of the object is balanced or neutralized by a holding or tensile force of the system. In the context of the present invention, this state is preferably referred to as the balancing or equilibrium state. It is preferred within the meaning of the invention that the holding or pulling force that is required to compensate for the weight of the object can be generated by the motor of the system. In other words, the motor of the system can be used to force the weight to balance the item.
- the motor current is preferably regulated with the aid of a motor controller or with the aid of motor electronics.
- the system has at least one additional sensor, this additional sensor being provided for determining the motor current.
- the additional sensor can therefore preferably also be referred to as a current sensor.
- the current or a current value for the new position of the object can be readjusted so that the user can move the object without applying the actual weight force if the position of the object is changed by the user by lifting or lowering the object is changed.
- the position of the attached object can be controlled via an input device.
- the input device may include, but is not limited to, a display, touch screen, buttons, switches, controls, and/or other actuators.
- the wording that the "position of the attached object can be controlled via an input device" means in the context of the invention that the input device can have, for example, an "up switch” and a “down switch", with actuation of the up switch preferably results in the object being pulled up by the system, while actuation of the «down switch results in the object being lowered by moving it down.
- the input device may include an on/off switch that can be used to turn the system on or off.
- the input device can include output means, such as light-emitting diodes (LEDs), for example, with which, for example, an operational readiness of the system or a state of charge of the battery of the system can be displayed.
- LEDs can, for example, have different colors or emit light in different colors or flash. It is preferred within the meaning of the invention that forces caused by other movements by the user can be compensated for by similar or analogous methods.
- the system can be operated in different operating modes.
- a possible mode of operation relates, for example, to detaching or removing the object.
- this mode is referred to as "unhook" or hang-up mode.
- the position of the object is fixed in the suspension mode, so that the object can be removed from the pull cable of the system particularly easily and without force.
- the suspension module thus makes it easier for the user to detach the object or remove the object from the system.
- the user must Detaching the object does not apply the weight of the object, but this is taken from it by the system.
- the current position of the object in the suspension mode is controlled independently of the suspended load, ie the weight of the object.
- the various operating modes of the system can be set using the input device, for example.
- the input device can have different keys, switches or knobs, with the individual operating modes being switched on or off by actuating a switch or a plurality of switches. It can also be preferred within the meaning of the invention that the input of a specific key combination or a sequence of keys in a specific order can be used to switch operating modes on or off.
- the hang-up module can be switched on by preferably simultaneously pressing the "up" and "down" buttons of the input device.
- the input device can also have LEDs that can be used to indicate that a specific operating mode is switched on. For example, a specific LED can flash or change color in this case.
- the various operating modes can also be deactivated using the input device. For example, individual keys or key combinations can be pressed to disable hang mode. Another mode of operation of the system is, for example, the balancing state or mode.
- the user of the system works with the object, ie for example chisels or drills a hole
- part of the weight of the object is taken up by the subsoil that the object is working on.
- This absorption of force by the subsoil to be processed can lead to the object being pulled upwards because the reduced weight of the object is not compensated for in any other way.
- the user would now have to work downwards against the tensile force acting upwards. This can be prevented if the system includes a force sensor or a torque sensor, the force sensor being set up to detect the force on the traction cable (“cable force”), while the torque sensor is set up to detect the actually acting torque.
- the torque sensor can preferably be located between a roll of the take-up unit and the gearbox of the electronic module or between the motor and the gearbox. In terms of the invention, it is particularly preferred that contactless sensors are used. It is preferred within the meaning of the invention that the motor of the system is impressed with as much current as is required to compensate for the force actually acting. The force actually acting can be determined as the difference between the weight of the object and the force absorbed by the substrate.
- the system can preferably also implement overload detection.
- the system is set up to recognize large weights, i.e. heavy loads, and to react accordingly in order to protect itself.
- the system can display an error if an object weighing more than 20 kg, for example, is attached to the traction cable.
- the short-circuit brake of the system described below can be activated so that the object recognized as “too heavy” is carefully lowered to the floor or subsurface after a short-circuit in the motor phases or the motor windings of the system motor. This effectively protects the system from excessive mechanical loads that could possibly damage the system.
- a braking function is provided with which the object can be prevented from falling undesirably, which can happen if the power supply to the electronic module of the system is interrupted.
- the braking function can preferably be realized by short-circuiting the three phases of the motor of the system. This short-circuiting of the three motor phases or the motor windings is carried out in particular when the motor is de-energized.
- a short-circuit brake can be provided, which advantageously makes it possible for the falling speed of the object to be minimized to non-critical values and for higher falling speeds to be ruled out.
- the motor phases can be short-circuited, in particular, by two relays that are switched on when the motor is in a currentless state.
- the short-circuit brake is used, for example, when a power failure or another error in the system is detected.
- the object that is attached to the system can be carefully set down or lowered onto the floor or onto the substructure with the aid of the short-circuit brake.
- Another error can be, for example, the detection of a large load, for example a load that is greater than 20 kg.
- a mechanical brake can also be used to prevent the object from falling down quickly.
- the system represents a battery-operated, body-worn balancing system in which the weight of an object is compensated for by generating a counter-force, with the counter-force being transmitted by a traction cable.
- the object can in particular be a tool with which work is to be performed.
- it can be a chisel, a drill hammer, a fastening device or a similarly large and/or heavy device that is used, for example, to work on a wall or to drive an object to be fastened into a wall or underground.
- a tool with which work is to be performed can be a chisel, a drill hammer, a fastening device or a similarly large and/or heavy device that is used, for example, to work on a wall or to drive an object to be fastened into a wall or underground.
- Those skilled in the art are familiar with such tools.
- the object or tool can be attached to a traction cable of the system using suitable attachment or recording devices. It is preferred within the meaning of the invention that the traction cable connects the object to a device for winding up the traction cable, with the device for winding up the traction cable preferably being provided in the area of the back structure of the system.
- the winding device is preferably directed to lengthening or shortening an effective length of the traction cable. This is done as part of the balancing process, in which the weight or weight of the object is determined and used to set and control the effective length of the traction cable.
- the device for winding up the traction cable can thus release the traction cable or shorten its length and in this way balance out or compensate for the weight of the suspended object.
- the user of the proposed system is considerably relieved when working with the object, because when using the system he only has to apply the force required to carry out the work, but no longer the force to hold the power tool.
- the balancing of the weight of the object is transferred from the user to the system, so that the system user is relieved.
- the force that has to be applied to carry out the work can, for example, be a pressing force in order to propel the power tool or its tool into a wall or a substrate to be worked on.
- the traction cable is guided in or on a cantilever arm of the system in the direction of a back structure.
- the traction cable runs from the object in the direction of a first end of the cantilever arm, with the first end of the cantilever arm preferably also being able to be referred to as the front end of the cantilever arm.
- the cantilever is essentially L-shaped.
- the cantilever includes a back portion and a head portion, the back portion and the head portion being substantially perpendicular to each other.
- the back section of the cantilever arm runs essentially parallel to a spine of the system user, while the head section of the cantilever arm runs above or next to the head of the user, essentially perpendicular to the back section and/or the spine of the user user. It is preferred within the meaning of the invention that the cantilever arm or its head section can be guided over the user's head or next to the user's head. As a result, a particularly flexible and versatile system can be provided.
- the transition area between the back and head sections of the cantilever can be L-shaped, include a transition section or be designed as a joint.
- a transition area designed as a transition section between the back and head sections of the cantilever arm leads to a particularly stable structure of the proposed system, while a joint that can be provided in the transition area between the back and head sections of the cantilever arm allows the system to be folded, thereby Pack size of the combined system can be significantly reduced.
- top, bottom, front and rear do not represent unclear terms for the person skilled in the context of the present invention, since the terms and the associated spatial directions “up”, “down”, “Forward” and “to the rear” are explained, for example, in FIG.
- the weight of the object usually acts “down” in a spatial direction, ie in the direction of the ground on which the user of the system is standing.
- the “upward” spatial direction corresponds to the direction in which the object is moved when the effective length of the traction cable is shortened by the traction cable winding device.
- the object is in front of the user, for example at head, chest or stomach level.
- the head section of the cantilever usually represents the highest point of the system, so that in the terminology of the invention it forms the top of the system.
- the rear section of the cantilever forms the rear area of the system.
- the back structure with the electronic module, the motor for driving the winding device and the control device is provided in the rear, lower area of the system.
- the bottom end of the system can be formed, for example, by a hip belt with which the system can be attached to the user. According to the invention, this hip belt forms a first contact area on which a there is physical contact between the system user and the system.
- a second contact area can be formed by a back pad.
- the cantilever arm of the system can be accommodated by the back structure.
- the system includes an electronic module, wherein the electronic module can be arranged in particular in the area of the back structure of the system.
- the electronic module can be part of the proposed system.
- the electronic module includes an energy source for supplying the system with electrical energy.
- the energy source can be a battery or an accumulator ("accumulator"), with the accumulator preferably being rechargeable. If the object whose weight is compensated with the proposed system is a battery or accumulator-operated tool, it is preferred within the meaning of the invention that the energy source is similar or the same as the energy source of the tool. In other words, it is preferred within the meaning of the invention if essentially the same batteries and accumulators can be used for the power supply of the proposed system and the power tool.
- the electronic module also includes a device for winding up the traction cable and a motor for driving it. It is preferred within the meaning of the invention that the device for winding up the traction cable is arranged in an area of the back structure and that the traction cable can be wound up using the motor.
- the motor of the proposed system is designed to generate torque to balance the weight of the object.
- the balancing process takes place in particular when a new object is attached to the cable of the system. This can be the case, for example, when a tool device is replaced because another job needs to be done.
- the static weight or the weight of the object is controlled, with the controlled variable being the desired current value in particular.
- the compensation process represents an essentially continuously running open-loop and closed-loop control process, in which in particular the engine speed is controlled to the speed “zero”, i.e. a standstill.
- the compensation process is designed in particular as an automatic compensation process, in which the system preferably automatically on the weight of the object or its Responds to changes by adjusting the torque on the system's motor accordingly.
- the electronic module also includes a control device that is set up to carry out the compensation process in relation to the weight of the object.
- a control device that is set up to carry out the compensation process in relation to the weight of the object.
- the device for winding up the traction cable, the motor and the control device are supplied with electrical energy.
- a counterforce for the weight of the object is determined during the compensation process, so that the weight of the object is balanced or compensated for by the counterforce acting in the opposite direction to the weight.
- the counterforce can be transferred to the object using the traction cable.
- the weight of the object can be «taken from» a user of the system, so that the user - for example while working with the object - does not have to hold it at a certain height, but only has to apply the force that is required to do the specific work to be done with the item.
- the traction cable is guided by means of rollers and/or a Bowden cable.
- the Bowden cable can in particular include a Bowden cable or be formed by one.
- the traction cable is guided in or on the cantilever arm and thus leads from the object to be held, whose weight is to be compensated, to the winding device.
- the back structure comprises a first contact area and a second contact area, with contact being provided between the user of the system and the system at least in the contact areas.
- the first contact area can preferably be designed as a hip belt, while the second contact area can be designed as a back padding.
- the weight of the system can be optimally transferred to a stable body area of the system user by using a hip belt as the first contact area. In other words, a large proportion of the weight of the system is carried in the hip belt and distributed by this to a stable body area of the user. As a result, the wearing comfort of the proposed system can be significantly increased.
- a distance between the first contact area and the second contact area is preferably designed to be adjustable in order to adapt the system to the user and a to compensate for the overturning moment caused by the object.
- This tilting moment preferably acts in the “forward” spatial direction, so that the user of the system can be pulled “forward” in the spatial direction when using it and in particular when a heavy object is attached to the traction cable.
- the distance between the first contact area and the second contact area of the back structure of the system is chosen to be as large as possible in order to achieve good leverage. This is made possible in particular by the adjustability of the distance between the first contact area and the second contact area of the back structure.
- the proposed system has a linear guide that can be used to adjust the distance between the back padding and the hip belt.
- the user can set a possible maximum distance between the first and the second contact area of the back structure, adapted to his body size.
- the linear guide thus makes a significant contribution to compensating for the tilting moment of the object whose weight is to be compensated for by the system.
- the system has a strut in order to introduce a tilting moment caused by the object into a first contact area of the system.
- the tilting moment is preferably directed particularly into the hip belt of the system, where it is distributed over a stable part of the user's body.
- the derivation of the tilting moment can be further improved by the provision of the strut.
- the strut connects the back structure to the hip belt.
- the strut can be stiffened with a flexible plate to improve the transmission of force to the hip belt.
- the cantilever arm is designed to be foldable.
- the cantilever arm can include at least one joint.
- the invention thus relates to a system that can be carried by a user like a backpack, the system having a cantilever arm which runs above the head of a user when the system is used, with a pull rope being guided on the cantilever arm can be.
- An object can be attached or attached to the cable, the weight of which can be compensated with the help of the system.
- the object can in particular be a machine tool with which a user can perform applications such as drilling, chiseling, hammering, etc.
- the compensation of Ge weight forces in a moving object, such as a machine tool, with the From a technical point of view, working is a different challenge than transporting an object from a first position to a second position with the help of a pull rope.
- the proposed system With the proposed system, not only objects with a static, ie constant weight force can advantageously be moved or raised or lowered. Rather, the proposed system is set up to react to a dynamic change in the weight of the object and to adapt the tensile or holding force to the change. In this way, the user of the system can work with the object or the machine tool can be significantly simplified.
- the invention turns away from the prior art due to the ability to adjust the tensile or holding force to a dynamically changing weight force, in which objects can be transported by Switzerlandseilsys system.
- the adjustment of the tensile or holding force to a dynamically changing weight of a suspended object can preferably be done by determining a speed of the motor or its derivation, as well as a current setpoint value. In this case, the weight of the object can then be compensated using the determined desired current value.
- the invention can relate to a stand-alone solution in which the electronic module can be placed on a subsurface, for example.
- the traction cable can be guided over traction rollers which, for example, can be attached to a ceiling, ceiling beams, struts or columns on a construction site.
- the invention thus relates to an electronic module for compensating for the weight of an object.
- the terms, definitions and technical advantages introduced for the proposed system and its components preferably apply analogously to the electronic module.
- the object whose weight is to be balanced is attached to the module with a traction cable.
- the electronic module has the following components to compensate for the weight of an object:
- control device includes a control device, wherein the control device is set up to carry out a compensation process in relation to the weight of the object.
- FIG. 1 View of a preferred embodiment of the proposed system
- FIG. 3 schematic view of a preferred embodiment of the proposed system
- FIG. 1 shows a preferred embodiment of the proposed system 1, which is worn by a user 20.
- the system 1 comprises a cantilever arm 5 which, in the example of the invention shown in FIG. 1, runs above the head 21 of the user 20 .
- the cantilever 5 may have sections referred to as the back section 15, head section 16 and transition section.
- the back section 15 is arranged in a back or rear area of the system 1 and runs essentially parallel to a spine of the user 20.
- the head section 16 runs essentially perpendicular to the back section 15 of the cantilever arm 5, so that the back section 15 and head section 16 enclose a substantially right angle.
- the cantilever 5 can be L-shaped or have a transition area which has a transition section arranged obliquely between the back section 15 and the head section 16 .
- the cantilever 5 has a front or first end 7 and a second or rear end 8, which opens into the back structure 6 of the system 1 Sys.
- the back structure 6 makes it possible for the user 20 to carry the system 1 on his back.
- An electronic module 10 is provided in the back area of the user 20 and contains various components of the system 1 .
- an energy source 11 , a device 12 for winding up a traction cable 4 , a control device 14 and a motor 13 are accommodated in the electronic module 10 .
- the device 12 for winding up the traction cable 4 can comprise a pulley which is arranged at the output of a transmission 34 .
- the transmission 34 can also be part of the electronic module 10's.
- the back structure 6 or the electronic module 10 can be attached to the user 20 with a first contact area 17 and a second contact area 18 .
- the first contact area 17 can be designed as a hip belt, while the second contact area 18 is preferably designed as a back pad.
- An object 3 having a weight 2 can be fastened to the traction cable 4 . When the weight 2 han it is preferably the weight of the object 3, the weight 2 pointing in the direction of the ground. For the purposes of the invention, this direction is preferably referred to as the “down U” spatial direction.
- the other spatial directions “up O", "before ne V” or “backwards H” are also shown in FIG.
- the downward arrow which is provided with the reference number 2, symbolizes the weight force 2 of the object 3 and indicates its direction.
- the object 3 can preferably be in the form of a tool and can be attached to the system 1 via the traction cable 4 .
- simple fastening means such as snap hooks, or special fastening means or recording devices can be used.
- the traction cable 4 leads from the object 3 in the direction of the cantilever 5 and is then guided in or on the cantilever 5 in the direction of the back structure 6 or the electronic module 10 .
- the electronic module 10 In the electronic module 10 is the winding device 12, with which the traction cable 4 can be wound up.
- the effective length of the traction cable 4 can be lengthened or shortened.
- the length of the traction cable 4 can be adapted to the weight 2 of the object 3, with the weight 2 of the object 3 being determined in a compensation process.
- the winding device 12 is driven by a motor 13 which can also be arranged in the electronic module 10 .
- the compensation process represents a regulation and control process, the aim of which is that the motor 13 is at a standstill. In other words, the motor 13 is regulated to a speed of zero by the compensation process.
- the proposed system 1 enables a weight force 2 of the object 3 to be compensated for, so that the proposed system 1 can preferably also be referred to as a balancing system.
- the compensation of the weight 2 is preferably done by an interaction of winding device 12, motor 13 and control device 14, wherein the ge mentioned components of the system 1 are provided by the energy source 11 with electrical energy ver.
- the energy source 11 is preferably a battery or an accumulator.
- the weight force 2 of the object 3 is compensated in particular by a counterforce 9 which is exerted on the object 3 and transmitted to the object 3 by means of the traction cable 4 .
- the counterforce 9 balances the weight 2 of the object 3 and thus ensures that the user 20 of the system 1 does not have to hold the object 3 against gravity, but only has to apply the force required to work with the object 3 . As a result, the system 1 can make the work with the object 3 much easier for the user 20 .
- the counterforce 9 is marked in the figures with an arrow in the spatial direction "up" and the reference number 9 .
- a compensation process takes place in particular when a (new) object 3 is fastened to the traction cable 4 or when the object 3 is replaced.
- the compensation of the weight 2 of the object 3 can be regulated statically on its weight.
- Fig. 2 shows a preferred embodiment of the proposed system 1 with a length-adjustable back structure 6.
- the distance A between a hip belt 17 and a back pad 18 of the back structure 6 can be adjusted.
- a tilting moment 19 generated by the object 3 can be compensated for.
- the tilting moment 19 is shown in FIG. 2 with a hatched arrow and the reference number 19 .
- the tilting moment 19 is caused by the weight of the object 2 3, which pulls the system 1 in the spatial direction down U.
- a tilting moment 19 acts overall, which acts downwards and forwards and in particular pulls the cantilever 5 of the system 1 in this direction. It has been shown that a particularly large distance A between the hip belt 17 and the back padding 18 as the contact surfaces between the back structure 6 and the user 20 compensates for this tilting moment 19 particularly effectively, since particularly good leverage conditions prevail in this way.
- the left half of FIG. 2 shows a large distance A between hip belt 17 and back pad 18, which is symbolized by a capital letter A, while the right half of FIG. 2 shows a small distance a between hip belt 17 and back pad 18 , which is symbolized by a lowercase letter a.
- the individual sections 15, 16 of the cantilever 5 are shown in FIG.
- the cantilever 5 having a back section 15, a head section 16 and a transition section. While the back section 15 and the head section 16 are arranged essentially perpendicularly to one another, the transition section is in a transition area between the back section 15 and the head section 16 of the cantilever arm 5 .
- the adjustability of the distance A can be made possible in particular by the provision of a linear guide (not shown).
- FIG. 3 shows a schematic view of a preferred embodiment of the proposed system 1.
- the system 1 has an electronic module 10 and a control device 14, the electronic module 10 of the system 1 providing the weight compensation function of the system 1 in particular.
- the electronic module 10 can send control commands to the control device 14, which can in particular include information regarding the motor current to be set.
- the information and control commands that are passed on from the electronic module 10 to the control device 14 can include current values for compensating for the weight of the object 3 and/or current values for the position of the object 3.
- the incoming control commands of the electronic module 10 are further processed by the Steuerein device 14 in the sense that they are passed on to the motor controller 44 via the current controller 46 .
- the engine controller 44 is preferably configured to control the engine 13 .
- Another input variable of the control device 14 is the data from the current sensor 42, which can be further processed by the control device 14 or by the current controller 46. Data from Hall sensor 40 are also sent to control device 14.
- Control device 14 is set up in particular to evaluate the incoming signals from Hall sensor 40 and to forward control commands from electronic module 10 in order to control motor 13 of system 1 .
- the control device 14 can also be part of the electronic module 10 or integrated into the electronic module 10 .
- the control device 14 can in particular forward the evaluated data and information from the Hall sensor 40 to the electronic module 10 .
- This data and information can in particular be the speed of the motor 13 and/or a position of the motor 13 or its rotor (not shown).
- the speed of the motor 13 can be given in particular in the unit rad/s, while the position of the motor 13 or its rotor can be given in the unit rad.
- the system 1 may include an input device 48 .
- An input can be made by the user 20 at the input device 48 .
- the input device 48 can include keys, switches, knobs and other input means, which are shown in FIG. 3 as rectangular components of the input device 48 .
- the input device 48 can also be set up to output information.
- the input device 48 can include displays and/or LEDs, which are shown in FIG. 3 as round or circular components of the input device 48 .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP21169810.5A EP4080754A1 (de) | 2021-04-22 | 2021-04-22 | Verfahren, system und elektronisches modul zum ausgleich einer gewichtskraft eines gegenstands |
| PCT/EP2022/058862 WO2022223270A1 (de) | 2021-04-22 | 2022-04-04 | Verfahren, system und elektronisches modul zum ausgleich einer gewichtskraft eines gegenstands |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4327447A1 true EP4327447A1 (de) | 2024-02-28 |
Family
ID=75639755
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21169810.5A Withdrawn EP4080754A1 (de) | 2021-04-22 | 2021-04-22 | Verfahren, system und elektronisches modul zum ausgleich einer gewichtskraft eines gegenstands |
| EP22720641.4A Pending EP4327447A1 (de) | 2021-04-22 | 2022-04-04 | Verfahren, system und elektronisches modul zum ausgleich einer gewichtskraft eines gegenstands |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21169810.5A Withdrawn EP4080754A1 (de) | 2021-04-22 | 2021-04-22 | Verfahren, system und elektronisches modul zum ausgleich einer gewichtskraft eines gegenstands |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20240189923A1 (de) |
| EP (2) | EP4080754A1 (de) |
| WO (1) | WO2022223270A1 (de) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6386513B1 (en) * | 1999-05-13 | 2002-05-14 | Hamayoon Kazerooni | Human power amplifier for lifting load including apparatus for preventing slack in lifting cable |
| FR2978690A1 (fr) * | 2011-08-02 | 2013-02-08 | Pierre Andre Davezac | Exosquelette de levage et de portage de charges |
| EP3403775A4 (de) * | 2016-01-15 | 2020-01-22 | Kubota Corporation | Hilfsvorrichtung |
-
2021
- 2021-04-22 EP EP21169810.5A patent/EP4080754A1/de not_active Withdrawn
-
2022
- 2022-04-04 US US18/286,057 patent/US20240189923A1/en active Pending
- 2022-04-04 WO PCT/EP2022/058862 patent/WO2022223270A1/de not_active Ceased
- 2022-04-04 EP EP22720641.4A patent/EP4327447A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022223270A1 (de) | 2022-10-27 |
| US20240189923A1 (en) | 2024-06-13 |
| EP4080754A1 (de) | 2022-10-26 |
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