Method for determining a configuration of a drive mechanism having a moving element, moving element and system

Abstract

The invention relates to a method for determining a configuration of a drive mechanism (2) having a moving element (12, 16, 17, 20, 21, 22) for driving a heald (1), wherein a sensor device (40) comprises a target group (41) arranged on the moving element (12, 16, 17, 20, 21, 22), the target group (41) having an upper target (43) and a lower target (45), and the sensor device (40) comprises a sensor element (42) fixedly arranged on the weaving machine, wherein the method comprises operating the drive mechanism (2) to move the moving element (12, 16, 17, 20, 21, 22) such that the target group (41) passes the sensor element (42); detecting the presence of the upper target (43) and the lower target (45) within a sensing range with the sensor element (42); and determining an upper target detection torque (63) and a lower target detection torque (65) in a weaving cycle upon detecting the upper target (43) and the lower target (45). And the method comprises detecting the presence of an intermediate target (44) within a sensing range with the sensor element (42), wherein the intermediate target (44) is arranged on the moving element (12, 16, 17, 20, 21, 22) of the drive mechanism (2) and is arranged between the upper target (43) and the lower target (45); determining an intermediate target detection torque (64) in a weaving cycle upon detecting the intermediate target (44); and determining the configuration of the drive mechanism (2) based on the upper target detection torque (63), the intermediate target detection torque (64) and the lower target detection torque (65). The invention also relates to a moving element of a drive mechanism for driving a heald of a weaving machine, and to a system comprising a moving element and a sensor device.

Description

Technical Field

[0001] This invention relates to a method for determining the configuration of a drive mechanism having a moving element for driving a heald frame of a loom using a sensor device. The invention also relates to a moving element of a drive mechanism for driving a heald frame of a loom, and a system including the moving element and the sensor device. Background Technology

[0002] Different types of drive mechanisms are known for driving the heald frames of a loom to move up and down, such as the cam mechanism shown in US5273079, the multi-arm mechanism and eccentric mechanism shown in WO2004081113A1, or the mechanism shown in EP3341509A1 in which each heald frame is driven by a separate drive motor independent of the loom.

[0003] More specifically, EP3341509A1 illustrates a drive mechanism comprising a crank rotating about a crank axis, a connecting rod, and a lever having a first arm and a second arm, wherein the lever is reciprocating between an upper position and a lower position about a rotation axis, and wherein the connecting rod is connected to the crank via a first hinge joint eccentric to the crank axis, wherein the connecting rod is connected to the first arm of the lever via a second hinge joint, and wherein the position of the second hinge joint relative to the first arm of the lever is adjustable for adjusting the stroke of the heald frame moved by the drive mechanism. EP3341509A1 further illustrates a sensor device comprising a target group having a first target and a second target arranged on the lever, and a detector fixedly arranged on the loom at a measuring position, wherein the targets in the target group have different characteristics for generating a first signal when approaching the measuring position from the upper position or moving towards the upper position from the measuring position, and for generating a second signal when approaching the measuring position from the lower position or moving towards the lower position from the measuring position, wherein the second signal is different from the first signal. According to EP3341509A1, the movement profile or movement process is known in advance for different strokes. Therefore, the stroke can be determined based on the first signal, the second signal, and the known movement profile. Summary of the Invention

[0004] The object of this invention is to provide a method for determining the configuration of a drive mechanism having a moving element for driving a heald frame of a loom, the drive mechanism requiring little or no prior information about the movement profile. Another object of this invention is to provide a system that allows for the determination of the moving element of the drive mechanism for driving the heald frame of a loom, and includes the moving element and the sensor device.

[0005] According to a first aspect, a method is provided for determining the configuration of a drive mechanism using a sensor device, the drive mechanism having a moving element for driving a heald frame of a loom, wherein the sensor device includes a target group disposed on the moving element of the drive mechanism, the target group having an upper target, an intermediate target, and a lower target, wherein the intermediate target is disposed between the upper target and the lower target, and the sensor device includes a sensor element fixedly disposed on the loom and configured to detect the presence of targets in the target group within a sensing range. The method includes: operating the drive mechanism to move the moving element such that the target group passes the sensor element; detecting the presence of the upper target, intermediate target, and lower target within the sensing range using the sensor element; determining an upper target detection torque in a weaving cycle when the upper target is detected, determining an intermediate target detection torque in a weaving cycle when the intermediate target is detected, and determining a lower target detection torque in a weaving cycle when the lower target is detected; and determining the configuration of the drive mechanism based on the upper target detection torque, the intermediate target detection torque, and the lower target detection torque.

[0006] Throughout this application, the indefinite article “a” or “an” means “one or more”. In particular, a drive mechanism may include more than one moving element, each configured to drive a mandrel frame. Reference to “first element” does not imply the presence of a “second element.” Furthermore, the expressions “first” and “second” are used only to distinguish one element from another and do not indicate any order of these elements.

[0007] Although the terms “up” and “down” are used in this application to refer to the movement of the frame driven by the drive mechanism, the method can also be used for a moving element that moves from left to right, wherein, depending on the direction of movement of the moving element, a target positioned on the moving element approaches the sensor element from left and right.

[0008] In the following text, the term "determined target detection torque" will be used to refer to one, several, or all of the determined upper target detection torque, the determined lower target detection torque, and the determined intermediate target detection torque.

[0009] In the context of this application, torque in a textile cycle is defined as torque relative to the loom angle, such as the torque at which a moving element reaches or is in a specific position relative to the loom angle.

[0010] In the context of this application, the configuration of the drive mechanism is defined as a configuration or setting associated with at least one settable configuration parameter of the movement profile of the drive mechanism, said at least one settable configuration parameter being selected from the group including stroke, zero-crossing torque, cross torque, movement profile type, and / or combination pattern. In other words, by determining the configuration of the drive mechanism, at least one of the stroke, zero-crossing torque, cross torque, movement profile type, and / or combination pattern is determined, thereby allowing the determination of the movement profile, i.e., the movement path or curve of the moving element.

[0011] In the context of this application, travel (also called travel length) is the distance a moving element travels between two extreme positions (also called reversal points), typically between the upper and lower extreme positions. The travel of the moving element is the same as or proportional to the travel of the heald frame driven by the moving element. The midpoint of the travel distance of the moving element (which is the same distance from the two extreme positions) is called the zero position. The zero-crossing torque is defined as the torque exerted by the moving element through the zero position during upward and downward movement in a textile cycle.

[0012] In a loom, depending on the configuration of the drive mechanism and / or drive mechanism, so-called symmetrical and asymmetrical movements of the moving elements and thus the heald frames driven by the moving elements are possible; these are referred to as movement profile types in the context of this application. When asymmetrical movement is used, the movement profile of the lower warp yarns is typically different from that of the upper warp yarns.

[0013] Crossing moment is defined as the moment in a textile cycle when a moving element is in the position where it should cross itself as it moves from one extreme position to another. Crossing moment may differ from zero-crossing moment, especially for asymmetric movement profiles. The position of the moving element at the crossing moment is called the crossing position. The distance between the zero position and the crossing position is called the crossing height.

[0014] A weaving pattern, or textile pattern, is defined as a pattern in which weft and warp yarns interweave. Depending on the weaving pattern, not all heald frames move from one extreme position to another in each textile cycle.

[0015] The drive mechanism can be configured to adapt the movement profile of its moving element and thus the heald frame driven by the moving element to different textile conditions and / or textile patterns. In particular, depending on the drive mechanism, this configuration can be set to change one or more configuration parameters, such as those selected from groups including stroke, zero-crossing torque, cross torque, cross height, movement profile type, and / or combined pattern.

[0016] According to the present invention, a method is provided that allows the configuration of a drive mechanism to be determined by observing the movement of a moving element using a target group having three targets (i.e., an upper target, a middle target, and a lower target), requiring little or no prior information about any configuration parameters, so that the configuration of the drive mechanism can be determined in embodiments without requiring any input from the user or operator of the loom in the control device of the loom.

[0017] In embodiments of the method, the determined configuration is stored in the control unit of the loom. Therefore, the determined configuration can be used for subsequent operation of the loom and / or for setting the drive mechanism to a desired configuration. In one embodiment, the determined configuration is used to optimize the loom's rotational speed and / or to optimize the loom's insertion parameters for a set rotational speed.

[0018] In one embodiment, the sensor element is a Hall sensor, where the target is a magnet disposed at the moving element, particularly a magnet disposed at a side end of the moving element, wherein the method includes detecting the magnet with the sensor element when the magnet is moved into or out of the sensing range. In an alternative embodiment, the target is a separate element disposed at the moving element, such as an element such as a block fixed or glued to the moving element, particularly an element fixed to one side of the moving element. The fixing or gluing can be performed individually on each block or via an assembly of several blocks.

[0019] In other embodiments, the sensor element is a proximity sensor, wherein the target is a protrusion disposed on a moving element, particularly a protrusion disposed on a side end of the moving element, the protrusion being spaced by a notch, wherein the method includes detecting a rising edge of the target with the sensor element when the target is moved within the sensing range. This allows the target to be manufactured integrally with the moving element. In addition to or instead of a rising edge, in one embodiment, a falling edge is also detected and processed to determine the configuration of the drive mechanism.

[0020] In one embodiment, the drive mechanism operates in the textile direction to move a moving element back and forth, such that a group of targets passes the sensor element from below and from above. The method for determining the configuration of the drive mechanism includes detecting the presence of targets within a sensing range when targets pass the sensor element from below and from above; and determining target detection torques, including a first upper target detection torque in the textile cycle when an upper target is detected when passing the sensor element from below, a second upper target detection torque in the textile cycle when passing the sensor element from above, a first intermediate target detection torque in the textile cycle when passing the sensor element from below, a second intermediate target detection torque in the textile cycle when passing the sensor element from above, a first lower target detection torque in the textile cycle when passing the sensor element from below, and a second lower target detection torque in the textile cycle when passing the sensor element from above.

[0021] In the context of this application, the weaving direction is defined as the direction of movement used in normal operation of the loom. When the drive mechanism is operated in the weaving direction, the moving element moves back and forth within one, two, or several weaving cycles, moving the driven heald frame up and down. According to this application, the drive mechanism operates for a sufficient time so that each target in the target group passes the sensor element from above and from below at least once, wherein—using three targets—six target detection torques are identified, for example using rising edges, which can be used for subsequent determination of the drive mechanism configuration.

[0022] Based on the above, although the expressions "from below" and "from above" are used in this application to correspond to the movement of the frame driven by the drive mechanism, the method can also be used for a moving element that moves from left to right, wherein, depending on the direction of movement of the moving element, a target disposed on the moving element approaches the sensor element from the left and from the right.

[0023] In one embodiment, the drive mechanism operates in opposite directions to move the moving element back and forth, such that the target group passes the sensor element from below and from above. The method for determining the configuration of the drive mechanism further includes: detecting the presence of a target within the sensing range when the target passes the sensor element from below and from above; and determining a target detection torque, which includes a third upper target detection torque in a textile cycle when an upper target is detected when the target passes the sensor element from below, a fourth upper target detection torque in a textile cycle when an upper target is detected when the target passes the sensor element from above, a third intermediate target detection torque in a textile cycle when an intermediate target is detected when the target passes the sensor element from below, a fourth intermediate target detection torque in a textile cycle when an intermediate target is detected when the target passes the sensor element from above, a third lower target detection torque in a textile cycle when a lower target is detected when the target passes the sensor element from below, and a fourth lower target detection torque in a textile cycle when a lower target is detected when the target passes the sensor element from above.

[0024] In the context of this application, the opposite direction is defined as the direction opposite to the textile direction. When the drive mechanism is operated in both the textile direction and the opposite direction for a sufficient period of time, such that each target in the target group passes the sensor element twice from above and twice from below, for example using the rising edge to identify the detection torque of twelve targets, this can be used for subsequent determination of the configuration of the drive mechanism.

[0025] In one embodiment, determining the configuration of the drive mechanism includes determining the zero-crossing torque in the textile cycle when the moving element is in the zero position based on two determined intermediate target detection torques, which have been determined when the intermediate target is detected as the moving element passes over the sensor element from above and from below. In particular, the intermediate target is symmetrically arranged with respect to the zero position line when the moving element is in the zero position, and the sensor element is arranged at the height of the zero position line.

[0026] As described above, the zero position is the midpoint of the travel or distance of the moving element. To determine the zero position, the torque at which the midpoint of the intermediate target is at the height of the sensor element is determined, wherein in the embodiment, the sensor is arranged at the height of the zero position line, and the intermediate target is arranged such that its midpoint is at the zero position line. Depending on the embodiment, two intermediate target detection torques are determined, namely, the first and second intermediate target detection torques or the third and fourth intermediate target detection torques, or all four intermediate target detection torques are determined. To determine the torque at which the midpoint of the intermediate target is at the height of the sensor element, two of these determined intermediate target detection torques are used, specifically the first and second intermediate target detection torques or the first and fourth intermediate target detection torques, the third and fourth intermediate target detection torques, or the third and second intermediate target detection torques. In other words, the torque is used to determine the torque when the midpoint of the intermediate target is at the height of the sensor element when the intermediate target is detected by the sensor element, when the intermediate target moves past the sensor element from two opposite directions. Of course, embodiments using more than two determined intermediate target detection torques are also conceivable.

[0027] In one embodiment, determining the configuration of the drive mechanism further includes determining the movement profile type, wherein information about different movement profile types is pre-stored, and the movement profile type is determined based on the determined zero-crossing torque.

[0028] The movement profile type can include symmetrical and asymmetrical types. In this embodiment, different symmetrical and / or asymmetrical types are considered. This method utilizes the different characteristics of different movement profile types in zero-crossing moments. Therefore, using the determined zero-crossing moment and pre-stored information about possible movement profile types, the movement profile type can be determined without requiring any input from the user or operator.

[0029] In one embodiment, determining the configuration of the drive mechanism includes determining the cross torque, wherein when the moving element is at one of its reversal points, the reversal point torque in the textile cycle is determined based on the determined target detection torque, and the cross torque is defined based on the reversal point torque.

[0030] As described above, the crossing torque is the torque at which a moving element is positioned to cross itself when moving from an upper position to a lower position or from a lower position to an upper position during a textile cycle. In one embodiment, the reversal point torque is defined using a selected first determined target detection torque determined for one target in a target group when the drive mechanism is driven in the textile direction and a selected second determined target detection torque determined for said one target in the target group when the drive mechanism is driven in the opposite direction, wherein the reversal point torque is the midpoint between the selected first determined target detection torque and the selected second determined target detection torque. In other embodiments, more than two determined target detection torques are used to allow compensation for measurement inaccuracies.

[0031] In one embodiment, determining the configuration of the drive mechanism includes determining the cross height at the cross torque relative to the zero position based on the movement profile type. In one embodiment, the movement profile type is determined based on the zero-crossing torque, which is determined based on a determined intermediate target detection torque. In other embodiments, the movement profile type is known in advance or input by a user or operator.

[0032] In one embodiment, determining the configuration of the drive mechanism further includes determining the travel of the helical frame, wherein the travel is determined via a first method based on the upper target detection torque and the lower target detection torque, and wherein the travel is determined via another method selected from the group consisting of: a second method based on the upper target detection torque and the intermediate target detection torque, a third method based on the intermediate target detection torque and the lower target detection torque, and a fourth method based on the distance (particularly the notch) between the upper target and the intermediate target and between the intermediate target and the lower target.

[0033] As described in EP3341509A1, the angular difference between two determined target detection torques can be used to determine the stroke of the moving element, and thus the stroke of the heald frame driven by the moving element. For this purpose, in one embodiment, for a first approach, the angular distance between the midpoints of the upper and lower targets as they move through the sensor element is determined. For another approach, in an embodiment, the torque as the midpoint of the intermediate target moves through the sensor element is used. According to a fourth approach, the midpoint of the distance between targets (particularly the midpoint of the notch between protruding targets) is used to determine the stroke.

[0034] In one embodiment, a hypothetical motion profile type selected from a plurality of pre-stored motion profile types is used to determine the stroke. When prior information about the motion profile type is available, it is possible to determine the stroke using two target detection torques as described in EP3341509A1. This invention allows for stroke determination without such prior information about the motion profile type. For this purpose, it is assumed that the configuration has a hypothetical motion profile type selected from a plurality of possible motion profile types, and the stroke is then determined using the hypothetical motion profile in at least two different ways. If the same stroke is determined within limits using the two different ways, it is inferred that the hypothetical motion profile type is the actual motion profile type, and the determined stroke is the actual stroke. If the strokes determined in the two different ways are different, it is inferred that the hypothetical motion profile type is not the actual motion profile type. Therefore, an alternative motion profile type is selected from a plurality of possible motion profile types, and the determination is repeated. In this way, the stroke and motion profile type can be determined without prior information about the actual motion profile type.

[0035] In one embodiment, the distance between the upper target and the middle target is different from the distance between the middle target and the lower target, wherein the method includes determining the movement direction of the moving element based on a first angular distance between a first torque when a first target of the target group is detected and a second torque when a second target of the target group is detected, and a second angular distance between a second torque when a second target of the target group is detected and a third torque when a third target of the target group is detected.

[0036] In one embodiment, determining the configuration of the drive mechanism includes determining a combination pattern, wherein the drive mechanism operates within multiple textile cycles to move moving elements back and forth.

[0037] In one embodiment, to determine the bonding pattern, the timing of when the moving element is moved to drive the heald frame into a first extreme position and the number of weaving cycles held in the first extreme position are determined based on a determined target detection torque; similarly, the timing of when the moving element is moved to drive the heald frame into a second extreme position and the number of weaving cycles held in the second extreme position are determined based on a determined direction of movement of the heald frame. In one embodiment, for example for a cam mechanism, the number of weaving cycles for the bonding pattern can be four, five, or six, thus the maximum number of weaving cycles for the bonding pattern is six, and this configuration can be determined when the target group passes the sensor element eleven times.

[0038] In one embodiment, a height detector is provided, comprising a height detector target and a height detector sensor element disposed on a heald frame driven by a moving element. The height of the heald frame is detected by the detector through a torque, i.e., the torque exerted by the height detector target on the height detector sensor element, and the height position of the heald frame is determined based on the torque exerted by the height detector and the configuration of the drive mechanism, particularly the configuration of the drive mechanism determined using the method described above, and especially using a hypothetical motion profile type selected from a plurality of pre-stored motion profile types. The heald frame driven by the moving element can be coupled to the moving element at different heights, wherein, in the context of this application, the relative position of the heald frame with respect to the drive mechanism is referred to as the height position of the heald frame.

[0039] According to a second aspect, a moving element is provided for a drive mechanism of a heald frame for driving a loom. The moving element includes a set of targets having an upper target and a lower target, wherein the set of targets further includes an intermediate target disposed between the upper and lower targets. Specifically, the intermediate target is a protrusion disposed on the moving element, particularly a protrusion disposed at a side end of the moving element, the protrusion being separated by a notch. In a preferred embodiment, the moving element is a lever, particularly a lever disposed on the non-drive side of the drive mechanism. In one embodiment, the lever with the protrusion is manufactured by stamping. In an embodiment, the lever according to the invention replaces the lever of a conventional drive mechanism to allow the implementation of the method of the invention.

[0040] According to a third aspect, a system is provided, comprising a control device, a drive mechanism for driving a heald frame of a loom, and a sensor device. The drive mechanism has a moving element, and the sensor device has a target group disposed on the moving element and a sensor element fixedly mounted on the loom and configured to detect the presence of targets of the target group within a sensing range. The target group includes an upper target, an intermediate target, and a lower target, wherein the intermediate target is disposed between the upper and lower targets. The drive mechanism is configured to be operated to move the moving element such that the target group passes the sensor element. The control device is configured to determine an upper target detection torque in a weaving cycle when an upper target is detected, an intermediate target detection torque in a weaving cycle when an intermediate target is detected, and a lower target detection torque in a weaving cycle when a lower target is detected. The control device is configured to determine the configuration of the drive mechanism based on the upper target detection torque, the intermediate target detection torque, and the lower target detection torque.

[0041] A system using a target group with three targets allows for the determination of the drive mechanism configuration without prior information about certain configuration parameters (such as the type of movement profile). Of course, the system can also be used when at least some configuration parameters are known in advance and / or when checking that the configuration parameters present or entered in the loom control unit are correct.

[0042] In one embodiment, the sensor element is a proximity sensor, wherein the target is a protrusion disposed on a movable element, particularly a protrusion disposed on a side end of the movable element, the protrusion being spaced by a notch, wherein the sensor device is configured to detect the rising edge of the target when the target is moved into the sensing range using the sensor element.

[0043] In one embodiment, the system has a height detector configured to detect the height of the heald frame by a torque and to determine the height position of the heald frame based on the torque and a determined configuration of the drive mechanism, particularly using a hypothetical movement profile type selected from a plurality of pre-stored movement profile types. Specifically, the height detector includes a height detector sensor element and a height detector target disposed on the heald frame driven by a movement element of the drive mechanism.

[0044] Determining the height position of the tie frame by means of torque and based on the torque of the height detector does not necessarily require the use of a sensor device with three targets to determine the configuration of the drive mechanism. In an advantageous modification, the height position of the tie frame is determined based on the detected torque of the height detector and a known configuration of the drive mechanism driving the tie frame, particularly based on a known movement profile, a known zero-crossing line, and / or a known zero-crossing torque. In another advantageous modification, the height position of the tie frame is determined based on the detected torque of the height detector and a determined configuration of the drive mechanism driving the tie frame, particularly the determined movement profile, the determined zero-crossing line, and / or the determined zero-crossing torque, wherein in one embodiment, a sensor device with only one target, only two targets, or more than three targets is used to determine the configuration. Attached Figure Description

[0045] In the following description, embodiments of the invention will be described in detail with reference to the accompanying drawings. Throughout the drawings, the same elements will be designated by the same reference numerals.

[0046] Figure 1 A front view of an embodiment of a drive mechanism for driving a heald frame of a loom is shown, the drive mechanism having a system for determining the configuration of the drive mechanism.

[0047] Figure 2 Shown at magnified scale Figure 1 Details of the drive mechanism.

[0048] Figure 3 Shown at magnified scale Figure 2 Details.

[0049] Figure 4 It shows that according to Figure 1A front view of the drive mechanism, which has an alternative system for determining the configuration of the drive mechanism.

[0050] Figure 5 It shows Figure 1 The possible movement profile of the moving element of the drive mechanism within two textile cycles.

[0051] Figure 6 Two movement profiles of two different movement profile types are shown within three textile cycles.

[0052] Figure 7 Four different movement profiles of four different movement profile types are shown within two textile cycles.

[0053] Figure 8 The movement profile of the moving element is shown to illustrate the stroke determination via the first method.

[0054] Figure 9 It shows Figure 8 The movement profile is used to illustrate the determination of the journey via the second or third method.

[0055] Figure 10 It shows Figure 8 The movement profile is used to illustrate the stroke determination via the fourth method.

[0056] Figure 11 Three different movement profiles of an asymmetric movement profile type are shown, with three different strokes and associated cross heights.

[0057] Figure 12 The moving profiles of the heald frame and the moving elements that drive the heald frame are shown to illustrate the use of a height detector to determine the height position of the heald frame.

[0058] Figure 13 The movement profiles of the heald frame and the moving elements that drive the heald frame are shown to illustrate how the height position of the heald frame can be determined using a height detector in an alternative manner.

[0059] Figure 14 The moving outline of the moving elements of the combined pattern is shown in six textile cycles during the twelve textile cycles. Detailed Implementation

[0060] Figure 1 The heald frame 1 and drive mechanism 2 of the shed forming device 3 of the loom are shown. Figure 2 Shown at magnified scale Figure 1 The details of the drive mechanism, and Figure 3 Shown at magnified scale Figure 2 Details.

[0061] The shed forming apparatus 3 includes a plurality of heald frames 1, with a drive mechanism 2 assigned to each heald frame 1. In the illustrated embodiment, the plurality of drive mechanisms 2 are driven by a common drive system 26 having an axis 4. Figure 1 The fixed frame 9 of the loom is schematically shown in the figure.

[0062] Figure 1 The drive mechanism 2 shown for driving the heald frame 1 is a cam mechanism. It includes two cams 5 and 6 that rotate about axis 4, a drive lever 7 driven by cams 5 and 6 to oscillate about axis 8, a connecting rod 10 connected to the drive lever 7 via a hinge joint 11, and a first lever 12. The first lever 12 is rotatable between an upper and lower position about a fixed first rotation axis 13. The first lever 12 has a first arm 14 and a second arm 15, and the first lever 12 is connected to the connecting rod 10 at the first arm 14. The drive mechanism 2 also includes a second lever 16 and a third lever 17, the second lever 16 being rotatable between an upper and lower position about a second rotation axis 18, and the third lever 17 being rotatable between an upper and lower position about a third rotation axis 19. The second lever 16 and the third lever 17 are connected to the first arm 14 of the first lever 12 by means of a connecting rod 20 and are driven by the first lever 12 to move together with it. The first lever 12, the second lever 16, and the third lever 17 are collectively referred to as levers 12, 16, and 17. As those skilled in the art will understand, other embodiments may be conceived in which only two or more of levers 12, 16, and 17 are provided.

[0063] The heald frame 1 is connected to the second arm 15 of the first lever 12 by means of a lifting rod 21 and a fixing element 22, which is guided in the fixed guide element 23 of the loom. The second lever 16 and the third lever 17 are also connected to the heald frame 1 via the lifting rod 21 and the fixing element 22.

[0064] To determine the configuration of the drive mechanism 2, a sensor device 40 is provided, which includes a target group 41 and sensor elements 42 fixedly arranged on the loom. For example... Figure 2 As best shown, the sensor device 40 includes a target group 41 having an upper target 43, a middle target 44, and a lower target 45, which, in the illustrated embodiment, are disposed on a third lever 17. A sensor element 42 is configured to detect the presence of targets 43, 44, and 45 of the target group 41 within its sensing range.

[0065] exist Figure 1In the embodiment shown, a height detector 50 is further provided, which includes a height detector target 51 disposed on the heald frame 1 and a height detector sensor element 52 fixedly disposed on the loom, wherein the height detector sensor element 52 is configured to detect the presence of the height detector target 51 within the sensing range of the height detector sensor element 52.

[0066] The sensor device 40 and the height detector 50—particularly the sensor element 42 of the sensor device 40 and the height detector sensor element 52 of the height detector 50—are in communication with the control device 25, which is, for example, part of or in communication with the central control unit of the loom.

[0067] In the illustrated embodiment, targets 43, 44, and 45 of the target group 41 are protrusions disposed on lever 17, which is located on the non-driving side of the drive mechanism 2, i.e., the side opposite to the drive lever 7. Targets 43, 44, and 45 are provided as protrusions extending from the side end of lever 17 opposite to the drive lever 7. This arrangement allows sufficient mounting space for the target group 41 and the sensor element 42. However, the invention is not limited to this arrangement, and other arrangements will be apparent to those skilled in the art; for example, targets 43, 44, and 45 of the target group 41 could be protrusions disposed on lever 12 or lever 16.

[0068] The first lever 12 is connected to the drive lever 7 via the connecting rod 10. In the illustrated embodiment, the drive lever 7 is curved, and the position of the hinge joint 11 connecting the connecting rod 10 to the drive lever 7 can be adjusted along the drive lever 7 by sliding the hinge joint 11 along the drive lever 7. The curvature of the drive lever 7 is selected such that when adjusting the position of the hinge joint 11 along the drive lever 7, the hinge joint 11 remains in the position determined by the connecting rod 10. Figure 1 The dotted line schematically illustrates the arc of an imaginary circle, whose center is located at the junction between the first arm 14 and the connecting rod 10, and whose radius is... Figure 1 Arrow 29 is schematically shown. Therefore, in the illustrated embodiment, when adjusting the position of the hinge joint 11 along the drive lever 7 to adjust the travel of the heald frame 1, as... Figure 1 The zero positions of levers 12, 16, and 17 shown remain unchanged, where, for example, the zero position is located at the midpoint of the travel distance of levers 12, 16, and 17, and has the same distance to the two extreme positions. When lever 17 is in the zero position, the line passing through the third rotation axis 19 is called the zero position line 46, where... Figure 2 As shown, the zero position line 46 is a horizontal line passing through the rotation axis 19 of the lever 17 and the rotation axis 24 of the lifting rod 21 connecting the lever 17 and the heddle frame 1.

[0069] like Figure 2and Figure 3 As best illustrated, in the illustrated embodiment, sensor element 42 is arranged, for example, at the height of zero position line 46, and when lever 17 is in the zero position, intermediate target 44 is arranged symmetrically or approximately symmetrically with respect to zero position line 46. Furthermore, in the illustrated embodiment, the distance between upper target 43 and intermediate target 44 (i.e., the size of the notch 30 provided between upper target 43 and intermediate target 44) is different from the distance between intermediate target 44 and lower target 45 (i.e., the size of the notch 31 provided between intermediate target 44 and lower target 45). Upper target 43 is arranged symmetrically with respect to center line 27 passing through third rotation axis 19, while lower target 45 is arranged symmetrically with respect to center line 28 passing through third rotation axis 19. In the illustrated embodiment, the sizes of upper target 43 and lower target 45 are different, wherein... Figure 2 As shown, the zero-position line 46 is, for example, arranged in the bisector of the two center lines 27 and 28. As shown in the embodiment, the upper target 43 and the lower target 45 have different sizes, and the notches 30 and 31 also have different sizes.

[0070] In operation, the heald frame 1 is driven to move up and down, wherein the movement profile of the drive mechanism 2 and thus the movement profile of the heald frame 1 connected thereto depends particularly on the configuration of the drive mechanism 2. As mentioned above, the stroke of the heald frame 1 can be set by adjusting the position of the hinge joint 11 along the drive lever 7. Depending on the type of drive mechanism 2, additional or other components may be adjustable during use or during the setup or manufacture of the drive mechanism 2. The loom allows the setting and determination of configuration parameters for the movement profile of the drive mechanism 2, which is selected from a group including stroke, zero-crossing torque, cross height, cross torque, movement profile type, and / or combined pattern.

[0071] The first lever 12, the second lever 16, the third lever 17, the connecting rod 20, the lifting rod 21, and the fixed element 22 are collectively referred to as the moving elements. Figure 1 and Figure 2 In the embodiment shown, the target group 41 is disposed on the third lever 17 arranged on the non-drive side of the drive mechanism 2.

[0072] Figure 4 Another embodiment of the shed forming apparatus 3 and the sensor device 40 for determining the configuration of the drive mechanism 2 is shown, wherein... Figure 1 Compared to the previous embodiment, the target group 41 is disposed on different moving elements, particularly on the link 20. The sensor element 42 is arranged opposite to the target group 41. The target group 41 includes three targets 43, 44, and 45, all disposed at the same height. Regardless of their arrangement, the targets are referred to as the upper target 43, the middle target 44, and the lower target 45 according to the movement of the frame 1 driven by the drive mechanism 2. Figure 4As shown, both the sensor device 40 and the height detector 50 communicate with the control device 25.

[0073] Figure 5 This illustrates the movement of the element within the two textile cycles (specifically, the third lever 17 of the drive mechanism 2, see...). Figure 1 The possible moving contour 70, in which moving elements 12, 16, 17, 20, 21, 22 and thus heald frame 1 (see) in the first textile cycle Figure 1 The moving elements 12, 16, 17, 20, 21, and 22 move from the lower limit position to the upper limit position, and in the second textile cycle, the heald frame 1 moves back to the lower limit position. When the moving element is in the zero position, the zero-crossing line 53 for the moving element is shown by a dashed line.

[0074] When moving from the lower limit position to the upper limit position, the upper target 43, the middle target 44, and the lower target 45 (see...) Figure 1 and Figure 2 They move one after another past sensor element 42 (see Figure 1 and Figure 2 Similarly, when moving from the upper limit position to the lower limit position, the lower target 45, the middle target 44, and the upper target 43 move past the sensor element 42 one after another.

[0075] When passing the sensor element 42 from below and above, the presence of targets 43, 44, and 45 within the sensing range of the sensor element 42 is detectable, and the target detection torque can be determined.

[0076] In the illustrated embodiment, sensor element 42 is configured to detect the rising edge of targets 43, 44, 45 when targets 43, 44, 45 are moved into the sensing range, such that when the drive mechanism 2 is operated to cause lever 17 to move in the direction of the target, the rising edge of the target is detected. Figure 5 As the moving profile moves back and forth, six target detection torques can be detected: the first upper target detection torque 1.43 in the textile cycle when the upper target 43 is detected when passing the sensor element 42 from below; the second upper target detection torque 2.43 in the textile cycle when the upper target 43 is detected when passing the sensor element 42 from above; the first middle target detection torque 1.44 in the textile cycle when passing the sensor element 42 from below; the second middle target detection torque 2.44 in the textile cycle when passing the sensor element 42 from above; the first lower target detection torque 1.45 in the textile cycle when passing the sensor element 42 from below; and the second lower target detection torque 2.45 in the textile cycle when passing the sensor element 42 from above.

[0077] In the illustrated embodiment, the drive mechanism 2 can also operate in the opposite direction, wherein the lever 17 moves with the same movement profile. When the drive mechanism 2 is operated to make the lever 17 utilize Figure 5 When the moving profile moves back and forth in opposite directions, six target detection torques can also be detected, namely, the third upper target detection torque 3.43 in the textile cycle when the upper target 43 is detected when passing the sensor element 42 from below, the fourth upper target detection torque 4.43 in the textile cycle when the upper target 43 is detected when passing the sensor element 42 from above, the third middle target detection torque 3.44 in the textile cycle when the middle target 44 is detected when passing the sensor element 42 from below, the fourth middle target detection torque 4.44 in the textile cycle when passing the sensor element 42 from above, the third lower target detection torque 3.45 in the textile cycle when passing the sensor element 42 from below, and the fourth lower target detection torque 4.45 in the textile cycle when passing the sensor element 42 from above. Determining the detection torques for the third and fourth targets allows for the reduction or even elimination of detection inaccuracies caused by the moving elements 12, 16, 17, 20, 21, and 22 moving the heald frame 1 up or down within one rotation of the loom.

[0078] based on Figure 5 The target detection torque shown can determine the unknown configuration of drive mechanism 2, which will be explained with reference to the following figures.

[0079] Zero-crossing torque In one embodiment, when the moving elements 12, 16, 17, 20, 21, and 22 are at the midpoint of their stroke or travel distance (referred to as the zero position), the zero-crossing torque 48 in the textile cycle is determined (in...). Figure 5 (shown by dashed lines), which refers to the torque in the textile cycle.

[0080] In one embodiment, such determination is based on determined intermediate target detection torques of 1.44, 2.44, 3.44, and 4.44.

[0081] For example, regarding Figure 2In the illustrated embodiment, when the moving element is at the zero position, the intermediate target 44 is symmetrically arranged relative to the zero position line 46, and the sensor element 42 is arranged at the height of the zero position line 46. In this case, the zero-crossing line 53 and the zero-crossing torques 48 and 54 can be determined based on two intermediate target detection torques determined when the intermediate target 44 is moving past the sensor element 42 from above and below. Specifically, the zero-crossing line 53 can be determined based on the first intermediate target detection torque 1.44 and the second intermediate target detection torque 2.44, or based on the third intermediate target detection torque 3.44 and the fourth intermediate target detection torque 4.44. At the same time, the first zero-crossing torque 48 can be determined based on the first intermediate target detection torque 1.44 and the fourth intermediate target detection torque 4.44, and the second zero-crossing torque 54 can be determined based on the third intermediate target detection torque 3.44 and the second intermediate target detection torque 2.44.

[0082] Cross torque In the context of this application, cross torque is defined as the torque when the moving elements 12, 16, 17, 20, 21, 22 (especially lever 17) are in positions related to the angle of the loom, wherein the moving elements 12, 16, 17, 20, 21, 22 should cross themselves when moving from top to bottom or from bottom to top.

[0083] Figure 6 Two movement profiles of two different movement profile types are shown within three textile cycles, wherein the movement profile 70 of the first movement profile type is shown as a solid line and the movement profile 71 of the second movement profile type is shown as a dashed line. The first movement profile type is symmetrical movement and the second movement profile type is asymmetrical movement.

[0084] The zero-crossing line 53 is shown as a solid line. The zero-crossing line 53 is either known or determined using the method described above. The crossing moment 49 is shown as a solid line, and the crossing moment 49 is to be determined.

[0085] To determine the cross torque 49, determine the reversal point torque 47 in the textile cycle (e.g.) Figure 5 and Figure 6 As shown in the diagram, the reversal point torque 47 is defined as the torque when the moving element is in one of its extreme positions and the movement reverses. The reversal point torque 47 is considered to be half of the textile cycle, i.e., 180° off from the cross torque. Therefore, based on the determined reversal point torque 47, the cross torque 49 can be determined. The reversal point torque 47 can be determined as the average centerline between target detection torques 1.43 and 3.43, target detection torques 4.43 and 2.43, target detection torques 1.44 and 3.44, target detection torques 4.44 and 2.44, target detection torques 1.45 and 3.45, and target detection torques 4.45 and 2.45.

[0086] Figure 6 The movement profile 70 shown by the solid line is a symmetrical movement profile. Therefore, the cross moment 49 coincides with the zero-crossing moment 48 (as indicated by...). Figure 5 (As shown by the dashed line). Figure 6 The movement profile 71 shown by the dashed line is an asymmetrical movement profile. Therefore, for the asymmetrical movement profile 71, the cross moment 49 and the zero-crossing moments 55 and 56 (by...) Figure 6 (The dotted lines in the text indicate that they do not overlap.)

[0087] The positions of the moving elements 12, 16, 17, 20, 21, and 22 (especially lever 17) at the cross torque are called cross positions. The distance between the zero position and the cross position is called the cross height H1. Figure 6 The type of the moving profile 70 shown is a symmetrical moving profile, and the zero position coincides with the intersection position. Figure 6 The type of the moving profile 71 shown is an asymmetrical moving profile, and the distance between the zero position and the cross position is the cross height H1, specifically the distance between the zero line 53 and the cross line 58.

[0088] Movement profile type and stroke determination In the context of this application, the different movement profiles defined by the configuration of the drive mechanism are referred to as movement profile types, where the movement profile type can be symmetrical or asymmetrical. When using an asymmetrical movement profile, the movement profile of the lower warp yarns is typically different from that of the upper warp yarns.

[0089] In an embodiment of the present invention, the type of moving contour is determined.

[0090] In one embodiment, determining the movement contour type is used to determine, for example... Figure 1 The configuration of the drive mechanism 2 in the form of a cam mechanism shown in the figure is such that the profiles of cams 5 and 6 and / or the angular offsets of cams 5 and 6 relative to the loom spindle are unknown in advance.

[0091] like Figure 6 As shown, for the symmetrical movement profile 70 indicated by solid lines, the zero position (i.e., the position of the moving elements 12, 16, 17, 20, 21, 22 (especially lever 17) between the extreme positions) coincides with the crossing position (i.e., the position of the moving elements 12, 16, 17, 20, 21, 22 (especially lever 17) at the crossing torque 49), where the moving elements 12, 16, 17, 20, 21, 22 should cross themselves when moving from top to bottom or from bottom to top. As indicated by the double arrows, in Figure 6 In this embodiment, distance A1 is equal to distance A2.

[0092] For the asymmetric movement profile 71 shown by the dashed line, the zero position—that is, the position of the moving elements 12, 16, 17, 20, 21, 22 (especially lever 17)—between the extreme positions of the zero-crossing torque 48 of the asymmetric movement profile 71—is shifted to the cross position, that is, the cross position is closer to one of the extreme positions. As indicated by the double arrows, in Figure 6 In the embodiment shown, the intersection position is closer to the lower limit position; in other words, the distance B1 is less than the distance B2.

[0093] Therefore, based on whether the intersection position coincides with or does not coincide with the zero position, symmetrical and asymmetrical movements can be distinguished.

[0094] In one embodiment, the actual movement profile type can be determined based on information that the determined movement profile type is symmetrical or asymmetrical, as well as pre-stored knowledge about the drive mechanism 2 and therefore pre-stored knowledge about possible movement profile types when the drive mechanism 2 is used, without requiring any input from the user or operator.

[0095] For example, in Figure 1 In the drive mechanism 2 shown, different cam sets and cam set arrangements can be used, thereby allowing for [various configurations] within two textile cycles. Figure 7 The diagram shows two symmetrical moving profiles 70 and 72 and two asymmetrical moving profiles 71 and 73. The zero-crossing line 53 is shown as a solid line.

[0096] like Figure 7 As shown, the two symmetrical moving profiles 70 and 72 both have an intersection position at the zero position.

[0097] The asymmetric movement profiles 71 and 73 differ in angular distance or offset between the cross torque 49 and their corresponding zero-crossing torques 55 or 57. Therefore, based on the determined zero-crossing torques 55 or 57 associated with the determined cross torque 49 and pre-stored information about the asymmetric movement profile types, it is possible to determine the cam configuration of the drive mechanism 2 for the two asymmetric movement profiles 71 and 73, and thus determine the associated movement profile types.

[0098] like Figure 7 As shown, the symmetrical moving profiles 70 and 72 both have the same cross moment 49, which is a zero-crossing moment.

[0099] In order to identify the actual symmetrical movement profile type, in one embodiment, the stroke is determined for each possible symmetrical movement profile type via at least two different methods, and the actual symmetrical movement profile type is determined as the symmetrical movement profile type that has the same stroke or shows the minimum deviation determined via at least two different methods.

[0100] Figure 8 The movement profile 70 of the moving element is shown to illustrate the stroke determination via a first method, wherein the stroke is determined based on the upper target detection torque 63 and the lower target detection torque 65. More specifically, for each possible movement profile type, for example for the two symmetrical movement profile types, the stroke is determined based on the angular distance D1 between the upper target detection torque 63 and the lower target detection torque 65. This determination can be performed as described in EP3341509, the contents of which are incorporated herein by reference.

[0101] In the illustrated embodiment, the upper target detection torque 63 is determined based on at least two of the first, second, third, or fourth upper target detection torques 1.43, 2.43, 3.43, and 4.43 associated with two different edges of the upper target 43 (see [reference]). Figure 2 Specifically, in this example, it is determined based on the upper target detection torques 1.43 and 4.43. The lower target detection torque 65 is determined based on at least two of the first, second, third, or fourth lower target detection torques 1.45, 2.45, 3.45, and 4.45 associated with two different edges of the lower target 45 (see [link to relevant documentation]). Figure 2 Specifically, in this example, it is determined based on the lower target detection torques of 1.45 and 4.45. Alternatively, one of the first, second, third, or fourth upper target detection torques of 1.43, 2.43, 3.43, or 4.43 may be used as the upper target detection torque, and one of the first, second, third, or fourth lower target detection torques of 1.45, 2.45, 3.45, or 4.45 may be used as the lower target detection torque.

[0102] Figure 9 It shows Figure 8 The movement profile 70 is used to illustrate the stroke determination via a second or third method, wherein the stroke is determined via a second method based on the upper target detection torque 63 and the intermediate target detection torque 64 and / or via a third method based on the intermediate target detection torque 64 and the lower target detection torque 65. The stroke is then determined based on the angular distance D2 between the upper target detection torque 63 and the intermediate target detection torque 64 or based on the angular distance D3 between the intermediate target detection torque 64 and the lower target detection torque 65.

[0103] In the illustrated embodiment, the intermediate target detection torque 64 is determined based on at least two of the first, second, third, or fourth intermediate target detection torques 1.44, 2.44, 3.44, and 4.44 associated with two different edges of the intermediate target 44 (see [link to relevant documentation]). Figure 2 In particular, in this example, it is determined based on the intermediate target detection torques of 1.44 and 4.44.

[0104] By providing the sensor device 40 with a target group 41 having three targets 43, 44, 45, angular distances D1, D2, or D3 between at least two pairs of different targets 43, 44, 45 can be determined, and the travel distance can be determined for each possible motion profile type (especially for each possible symmetrical motion profile type) based on these angular distances. The symmetrical motion profile type that shows the same travel distance or the travel distance with the smallest deviation between the different travel distances determined by at least two different methods using the angular distances between at least two pairs of different targets 43, 44, 45 is identified as the actual symmetrical motion profile type.

[0105] Figure 10 It shows Figure 8 The movement profile 70 is used to illustrate the stroke determination via a fourth method, wherein the stroke is determined based on angular distance D4. In the illustrated embodiment, angular distance D4 is based on the notch 30 between the upper target 43 and the intermediate target 44 (see...). Figure 2 ) and the notch 31 between the middle target 44 and the lower target 45 (see Figure 2 It is determined by ( ). For example, Figure 10 As shown in the example, the center 61 of the notch 30 can be determined based on the distance between the fourth upper target detection torque 4.43 and the first intermediate target detection torque 1.44, while the center 62 of the notch 31 can be determined based on the distance between the fourth intermediate target detection torque 4.44 and the first lower target detection torque 1.45. The angular distance D4 can be determined as the distance between the centers 61 and 62. Alternatively, the center 61 can be determined based on the distance between the second upper target detection torque 2.43 and the third middle target detection torque 3.44, while the center 62 can be determined based on the distance between the second middle target detection torque 2.44 and the third lower target detection torque 3.45.

[0106] Therefore, by providing a sensor device 40 with a target group 41 having three targets 43, 44, 45, instead of or added to the method used to determine the aforementioned travel, the angular distance between the notches 30, 31 or other distances between the targets can be determined, and the travel can be determined based on this angular distance for each possible type of movement profile.

[0107] As described above, the asymmetric movement profile type can be determined directly based on the angular distance or offset between the cross moment 49 and the zero-crossing moments 55 and 57. Of course, for example, in the case where two asymmetric movement profiles have the same zero-crossing moment, the travel distance of the asymmetric movement profile may also be determined in the manner described above for symmetrical movement profiles. If the movement profile type is known, then using only one of the four methods described above is sufficient to determine the travel distance. In one embodiment, the first method is used to determine the travel distance because the angular distance between the upper and lower targets is greater than any other determined angular distance, and the travel distance determination is more accurate. However, in other embodiments, the travel distance for the asymmetric movement profile type is determined via a different method than the first method, or via more than one method.

[0108] Cross height As mentioned above, for asymmetric movement profile types, the intersection position is offset from the zero position. The intersection position depends on the asymmetric movement profile type and the stroke.

[0109] Figure 11 Three different movement profiles 71, 74, and 75 of an asymmetric movement profile type with three different strokes are shown. If the movement profile type and the cross torque are known, the cross heights H1, H2, and H3 of the movement profiles 71, 74, and 75 can be determined, namely the distance between the zero position indicated by the zero line 53 and the cross position at the cross torque 49 indicated by the cross lines 58, 59, and 60.

[0110] In one embodiment, the determined cross heights H1, H2, and H3 can be used to optimize the height position of the heddle frame 1, in other words, the relative position of the heddle frame 1 with respect to levers 12, 16, and 17.

[0111] Height position of the frame exist Figure 1 and Figure 4 In the embodiment shown, the shed forming apparatus 3 further includes a height detector 50, which has a height detector target 51 disposed on the heald frame 1 and a height detector sensor element 52 fixedly disposed on the loom.

[0112] Figure 12 The moving profile 80 of the heald frame 1 and the moving elements driving the heald frame 1 (particularly lever 17) are shown (see Figure 1 The moving profile 70 is used to show the movement using the height detector 50 (see...). Figure 1 The relative height position of heald frame 1 is determined, also known as the height position. Because heald frame 1 is driven by a moving element, the moving profile 80 of heald frame 1 follows the moving profile 70 of the moving element.

[0113] The movement profile 70 of the moving element can be determined as described above, wherein the zero-crossing line 53 and the zero-crossing torque 48 are specifically determined.

[0114] The height detector target 51 is, for example, a protrusion, and the height detector sensor element 52 is configured, for example, to detect the rising edge of the height detector target 51 when the height detector target 51 approaches the height detector sensor element 52 from above and from below.

[0115] Therefore, the drive mechanism 2 drives the heald frame 1 to move up and down along the weaving direction and in the opposite direction, similar to... Figure 5 As explained in the text, in the illustrated embodiment, four target detection torques for the altitude detectors can be determined, namely, the target detection torque of the first altitude detector is 1.51, the target detection torque of the second altitude detector is 2.51, the target detection torque of the third altitude detector is 3.51, and the target detection torque of the fourth altitude detector is 4.51. Figure 12 As shown in the image.

[0116] In the illustrated embodiment, in the standard height position, the heald frame 1 is connected to the drive mechanism 2 such that when the center of the intermediate target 44 is arranged opposite to the sensor element 42, the center of the height detection target 51 is arranged opposite to the height detection sensor element 52. When the heald frame 1 is set in the standard height position, the movement profile 80 of the heald frame 1 is shown as a solid line and is referred to as the standard movement profile 80. For this standard movement profile 80, for example, the zero-crossing torque 48 of the movement profile 70 coincides with the torque in which the height detector target 51 is opposite to the height detector sensor element 52.

[0117] To set the standard height position of the frame 1, the drive mechanism 2 can be arranged in the standard position (preferably the zero position), while the height detector target 51 and / or the height detector sensor element 52 move vertically relative to each other until the height detector target 51 and the height detector sensor element 52 are arranged opposite to each other. In this way, the zero-crossing line 82 of the standard movement profile 80 intersects the standard movement profile 80 at the standard zero-crossing height target detection torque 76, which in this example coincides with the zero-crossing torque 48 of the movement profile 70. In this example, the zero-crossing torque 48 also coincides with... Figure 9 The intermediate target detection torque is 64.

[0118] Therefore, the zero-crossing line 82 of the standard moving profile 80 can be determined based on the target detection torque 1.51 of the first altitude detector, the target detection torque 2.51 of the second altitude detector, the target detection torque 3.51 of the third altitude detector, and / or the target detection torque 4.51 of the fourth altitude detector, for example, based on the target detection torque 1.51 of the first altitude detector and the target detection torque 4.51 of the fourth altitude detector.

[0119] When the heald frame 1 is attached to the drive mechanism 2 at different height positions, the moving profile 81 of the heald frame 1 shifts in position. The height position of the heald frame 1 relative to the drive mechanism 2 can be changed, for example, by altering the distance between levers 12, 16, 17 and the heald frame 1, as described in EP520540A1. Of course, other height position setting devices can be used, such as those described in EP2619361 or EP1322805B1.

[0120] Figure 12 The outline 81 of the moving heald frame 1 is shown in dashed lines. The heald frame 1 is attached to the drive mechanism 2 in a position above the standard height position. Figure 12 As shown, in this case, the height detector target 51 passes the height detector sensor element 52 before the zero-crossing torque 48, that is, the zero-crossing height target detection torque 66 of the frame 1 is before the zero-crossing torque 48 of the moving element.

[0121] The moving profile 81 of the heald frame 1 follows the moving profile 70 of the moving element. Therefore, based on the moving profile 70 of the moving element and the absolute height position of the heald frame 1 detected by the height detector 50, the relative position of the heald frame 1 with respect to the zero position of the moving element can be determined; in other words, the relative height position of the heald frame 1 can be determined.

[0122] For the standard moving profile 80 representing the standard height position as described above, the standard zero-crossing height target detection torque 76 of the standard moving profile 80 coincides with the zero-crossing torque 48 of the moving profile 70.

[0123] For different movement profiles 81, the target detection torque of the first height detector 1.61, the target detection torque of the second height detector 2.61, the target detection torque of the third height detector 3.61 and / or the target detection torque of the fourth height detector 4.61 can be determined, and based on these height detector target detection torques, the zero-crossing height target detection torque 66 of the movement profile 81 can be determined, for example based on the target detection torque of the first height detector 1.61 and the target detection torque of the fourth height detector 4.61.

[0124] The angular distance D5 between the zero-crossing moment 48 and the zero-crossing height target detection moment 66 determines a value related to the relative height position of the frame 1, specifically a value proportional to the relative height position of the frame 1. This value can be determined, for example, through geometric calculations based on the distance D5 and the determined movement profile. For the movement profile 81 relative to the standard movement profile 80, the height position is determined by... Figure 12 The arrow H5 indicates this. In Figure 12In the image, arrow H5 points upwards, meaning that the helical frame 1 is arranged further away from the drive mechanism 2, such that the height detector target 51 reaches the height detector sensor element 52 before the moving element reaches its zero position. Alternatively, if the helical frame 1 is arranged closer to the drive mechanism 2, the height detector target 51 will reach the height detector sensor element 52 after the moving element reaches its zero position, causing the associated arrow to point downwards.

[0125] Figure 13 This illustrates another method for determining the height position of the frame 1 using a height detector 50. In this example, the zero-crossing torque 48 is determined based on the upper target detection torque 63 and the lower target detection torque 65. When using... Figure 3 In the sensor device 40 shown, the zero-position line 46 is arranged in the bisector of the two center lines 27 and 28, and the zero-crossing torque 48 can be determined as the average of the upper target detection torque 63 and the lower target detection torque 65. The frame 1 can also be arranged in a height position such that when the standard moving profile 80 intersects with the zero-crossing line 82 of the standard moving profile 80, the zero-crossing torque 48 coincides with the standard zero-crossing height target detection torque 76. The relative height position of the frame 1 can be as follows: Figure 12 Further determination, as in the example.

[0126] In one embodiment, refer to Figure 12 and Figure 13 The two methods described are used in combination to determine the height position of the frame 1 in two alternative ways, thereby determining the height position more accurately, for example, based on the average of the values ​​obtained from the two alternative ways.

[0127] As those skilled in the art will understand, the above references Figure 12 and Figure 13 The method described for detecting the height of the heald frame using a torque detector and determining the height position of the heald frame based on that torque does not necessarily require the use of, for example... Figure 3 The target group 41 shown has three targets 43, 44, and 45 to determine the configuration of the drive mechanism and / or the moving element of the drive mechanism is equipped with three targets.

[0128] Conversely, in reference Figure 12 In the exemplary method described, only the target detection torque based on intermediate target 44 is used, while in the reference... Figure 13 In the exemplary method described, only the target detection torque based on the upper target 43 and the lower target 45 is used.

[0129] As those skilled in the art will understand, a standard height position can also be used as a reference. Figure 12The described method is determined based on the upper target 43 or the lower target 45, rather than on the intermediate target 44. Similarly, a reference can also be used. Figure 13 The described method determines the standard altitude position based on either the upper target 43 and the intermediate target 44, or based on the lower target 45 and the intermediate target 44, rather than based on the upper target 43 and the lower target 45.

[0130] In other words, the above generally discloses a method for determining the height position of the heald frame relative to a standard height position based on a height detector using torque, zero-crossing line 53 and / or zero-crossing torque 48, wherein the height detector uses a height detector 50 to determine the torque, the height detector 50 including a height detector sensor element 52 and a height detector target 51 disposed on the heald frame 1, and wherein a sensor device is used to determine the zero-crossing line 53 and the zero-crossing torque 48, the sensor device having a sensor element disposed on a moving element of a drive mechanism and at least one target, particularly exactly one target, two targets or three targets.

[0131] In one embodiment, the height position of frame 1 is determined using a sensor device with a target group having two targets in two alternative ways, wherein the height position is determined based on the average of the values ​​obtained through the two alternative ways.

[0132] Combined with pattern In the above embodiments, a moving profile with a 1:1 bonding pattern was defined, wherein the heald frame 1 moves up or down in each textile cycle. However, textiles with different bonding patterns are known.

[0133] Typically, when the drive mechanism 2 is a dobby mechanism or a motor-driven mechanism, the control unit of the loom knows the combined pattern and does not need to determine it.

[0134] However, for drive mechanisms of the cam type, the loom's control unit typically does not know the bonding pattern and it needs to be manually input by the user. Therefore, in one embodiment, alternatively or additionally, the determination of the configuration of the drive mechanism 2 includes determining the bonding pattern based on data from the sensor device 40 with a target group 41 having three targets. In the case of using a dobby mechanism or a motor drive mechanism, this determination can also be used to verify the correctness of the bonding pattern.

[0135] Figure 14 The moving profile 70 of the moving element of the combined pattern within six textile cycles is shown, and the moving profile 70 of the moving element within twelve textile cycles is also shown.

[0136] To determine the bonding pattern, in one embodiment, the drive mechanism 2 (see...) Figure 1The heald frame 1 is driven in the forward or weaving direction, and the direction of movement of the heald frame 1 and / or the moving element driving the heald frame 1 is determined. In one embodiment, this determination is performed based on target detection torques of 1.43, 2.43, 1.44, 2.44, 1.45, and 2.45 determined when moving in the weaving direction (see [link to relevant documentation]). Figure 5 ).

[0137] The number of textile cycles used for determination is selected based on the maximum number of textile cycles for possible combination patterns. In one embodiment, for example for a cam mechanism, where the maximum number of textile cycles for the combination pattern is six textile cycles, this configuration can be determined as described above when the target group passes the sensor element at least eleven times. This allows the combination pattern to be determined regardless of whether the number of textile cycles for the combination pattern is less than six textile cycles.

[0138] Based on the determined target detection torques of 1.43, 2.43, 1.44, 2.44, 1.45, and 2.45, it is possible to determine when the moving element (in particular lever 17) moves to drive the heald frame 1 into the first extreme position and how many weaving cycles the heald frame 1 maintains in the first extreme position, and when the moving element moves to drive the heald frame 1 into the second extreme position and how many weaving cycles the heald frame 1 maintains in the second extreme position.

[0139] In one embodiment, in order to determine the bonding pattern from an unknown initial position, the direction of movement of the heald frame is determined.

[0140] For this purpose, Figure 2 In the illustrated embodiment, the distance between the upper target 43 and the middle target 44 is different from the distance between the middle target 44 and the lower target 45. It should be noted that the distance difference in the illustrated embodiment is achieved by providing targets 43 and 45 of different lengths. Alternatively or additionally, the distance difference is achieved by providing notches 30 and 31 of different lengths between targets 43, 44, and 45.

[0141] Due to the varying distances, the direction of movement of lever 17 can be determined based on the angular distances between the determined target detection torques 1.43, 2.43, 1.44, 2.44, 1.45, and 2.45, and / or the torques derived from the determined target detection torques 1.43, 2.43, 1.44, 2.44, 1.45, and 2.45. It should be noted that for this purpose, it is not necessary to determine the precise values ​​of the target detection torques 1.43, 2.43, 1.44, 2.44, 1.45, and 2.45, but the signal pattern may be sufficient.

[0142] In one embodiment, the direction of movement is determined by using only a subset of two targets in the target group.

[0143] exist Figure 5 In the process, the target detection torques of 1.43, 4.43, 1.44, 4.44, 1.45, 4.45, 2.43, 3.43, 2.44, 3.44, 2.45, and 3.45 were determined during two textile cycles. For example... Figure 14 The combined pattern in the diagram may determine the detection torques of 1.43, 4.43, 1.44, 4.44, 1.45, 4.45, 2.43, 2.44, 3.44, 2.45, and 3.45 during several different textile cycles (e.g., within six textile cycles), and take the average value of the corresponding detection torques of 1.43, 4.43, 1.44, 4.44, 1.45, 4.45, 2.43, 3.43, 2.44, 3.44, 2.45, and 3.45. For example, the detection torques 1.43, 1.44, 1.45, 4.45, 4.44, and 4.43 can be detected once in region 67, while the detection torques 2.43, 2.44, 2.45, 3.45, 3.44, and 3.43 can be detected once in region 68 and once in region 69, so that the average value of these detection torques can be determined as the corresponding detection torque. Figure 5 The embodiments can be considered as determined Figure 14 The corresponding detection torque in regions 67 and 69 of the combined pattern.

Claims

1. A method for determining the configuration of a drive mechanism (2) using a sensor device (40), the drive mechanism (2) having moving elements (12, 16, 17, 20, 21, 22) for driving a heald frame (1) of a loom, wherein the sensor device (40) includes a target group (41) disposed on the moving elements (12, 16, 17, 20, 21, 22) of the drive mechanism (2), the target group (41) having an upper target (43) and a lower target (45), and the sensor device (40) includes a sensor element (42) fixedly disposed on the loom and configured for detecting The method of detecting the presence of targets (43, 45) of the target group (41) within a sensing range includes operating the drive mechanism (2) to move the moving elements (12, 16, 17, 20, 21, 22) such that the target group (41) passes the sensor element (42), detecting the presence of the upper target (43) and the lower target (45) within the sensing range using the sensor element (42), and determining the upper target detection torque (63) in the textile cycle when the upper target (43) is detected, and determining the lower target detection torque (65) in the textile cycle when the lower target (45) is detected, characterized in that... The method includes: detecting the presence of an intermediate target (44) within the sensing range using the sensor element (42), wherein the intermediate target (44) is disposed on the moving elements (12, 16, 17, 20, 21, 22) of the drive mechanism (2) and arranged between the upper target (43) and the lower target (45); determining an intermediate target detection torque (64) in the textile cycle when the intermediate target (44) is detected; and determining the configuration of the drive mechanism (2) based on the upper target detection torque (63), the intermediate target detection torque (64), and the lower target detection torque (65). The sensor element (42) is a proximity sensor, wherein the target (43, 44, 45) is a protrusion disposed at the moving element (12, 16, 17, 20, 21, 22), the protrusion being separated by a notch, wherein the method includes detecting the rising edge of the target (43, 44, 45) with the sensor element (42) when the target (43, 44, 45) is moved into the sensing range.

2. The method according to claim 1, characterized in that, The drive mechanism (2) operates in the textile direction to move the moving elements (12, 16, 17, 20, 21, 22) back and forth, such that the target group (41) passes the sensor element (42) from below and from above, wherein the presence of the target (43, 44, 45) within the sensing range is detected when passing the sensor element (42) from below and from above, and wherein a target detection torque is determined, the target detection torque including a first upper target detection torque (1.43) in the textile cycle when the upper target (43) is detected when passing the sensor element (42) from below, and an upper target detection torque (1.43) in the textile cycle when passing the sensor element (42) from above. The second upper target detection torque (2.43), the first intermediate target detection torque (1.44) in the textile cycle when the intermediate target (44) is detected when passing the sensor element (42) from below, the second intermediate target detection torque (2.44) in the textile cycle when the intermediate target (44) is detected when passing the sensor element (42) from above, the first lower target detection torque (1.45) in the textile cycle when the lower target (45) is detected when passing the sensor element (42) from below, and the second lower target detection torque (2.45) in the textile cycle when the lower target (45) is detected when passing the sensor element (42) from above.

3. The method according to claim 1 or 2, characterized in that, The drive mechanism (2) operates in opposite directions to move the moving elements (12, 16, 17, 20, 21, 22) back and forth, such that the target group (41) passes the sensor element (42) from below and from above, wherein the presence of the target (43, 44, 45) within the sensing range is detected when passing the sensor element (42) from below and from above, and wherein a target detection torque is determined, the target detection torque including a third upper target detection torque (3.43) in the textile cycle when the upper target (43) is detected when passing the sensor element (42) from below, and an upper target detection torque (43) in the textile cycle when passing the sensor element (42) from above. The fourth upper target detection torque (4.43), the third intermediate target detection torque (3.44) in the textile cycle when the intermediate target (44) is detected when passing the sensor element (42) from below, the fourth intermediate target detection torque (4.44) in the textile cycle when the intermediate target (44) is detected when passing the sensor element (42) from above, the third lower target detection torque (3.45) in the textile cycle when the lower target (45) is detected when passing the sensor element (42) from below, and the fourth lower target detection torque (4.45) in the textile cycle when the lower target (45) is detected when passing the sensor element (42) from above.

4. The method according to claim 1 or 2, characterized in that, Determining the configuration of the drive mechanism (2) includes determining the zero-crossing torque (48) in the textile cycle when the moving elements (12, 16, 17, 20, 21, 22) are at the zero position based on two determined intermediate target detection torques (64), which are determined when the intermediate target (44) is detected when the sensor element (42) is passed from above and from below.

5. The method according to claim 1 or 2, characterized in that, in, When the moving element is in the zero position, the intermediate target (44) is arranged symmetrically with respect to the zero position line (46), and the sensor element (42) is arranged at the height of the zero position line (46).

6. The method according to claim 4, characterized in that, Determining the configuration of the drive mechanism (2) includes determining the movement profile type, wherein information about different movement profile types is stored in advance, and the movement profile type is determined based on the determined zero-crossing torque (48).

7. The method according to claim 6, characterized in that, Determining the configuration of the drive mechanism (2) includes determining the cross torque (49), wherein the reversal point torque (47) in the textile cycle is determined based on the determined target detection torque when the moving element (12, 16, 17, 20, 21, 22) is at one of its reversal points, and the cross torque (49) is defined based on the reversal point torque (47).

8. The method according to claim 7, characterized in that, Determining the configuration of the drive mechanism (2) includes determining the cross height (H1, H2, H3) of the cross torque relative to the zero position based on the movement profile type.

9. The method according to claim 6, characterized in that, Determining the configuration of the drive mechanism (2) includes determining the stroke of the frame (1), wherein the stroke is determined via a first method based on the upper target detection torque (63) and the lower target detection torque (65), and wherein the stroke is determined via another method selected from the group consisting of: a second method based on the upper target detection torque (63) and the intermediate target detection torque (64), a third method based on the intermediate target detection torque (64) and the lower target detection torque (65), and a fourth method based on the distance between the upper target (43) and the intermediate target (44) and between the intermediate target (44) and the lower target (45).

10. The method according to claim 9, characterized in that, The journey is determined using a hypothetical movement profile type selected from a plurality of pre-stored movement profile types.

11. The method according to claim 1 or 2, characterized in that, The distance between the upper target (43) and the intermediate target (44) is different from the distance between the intermediate target (44) and the lower target (45), wherein the method includes determining the movement direction of the moving element (12, 16, 17, 20, 21, 22) based on a first angular distance between a first torque when detecting a first target of the target group (41) and a second torque when detecting a second target of the target group (41), and a second angular distance between a second torque when detecting a second target of the target group (41) and a third torque when detecting a third target of the target group (41).

12. The method according to claim 1 or 2, characterized in that, Determining the configuration of the drive mechanism (2) includes determining the combination pattern, wherein the drive mechanism (2) operates within a plurality of textile cycles to move the moving elements (12, 16, 17, 20, 21, 22) back and forth.

13. The method according to claim 6, characterized in that, The height detector of the heald frame (1) is used to detect the torque, and the height position of the heald frame (1) is determined based on the torque of the height detector and the configuration of the determined drive mechanism (2).

14. The method according to claim 13, characterized in that, Use the assumed movement profile type selected from multiple pre-stored movement profile types.

15. A system comprising a control device (25), a drive mechanism (2) for driving a heald frame (1) of a loom, and a sensor device (40), the drive mechanism (2) having moving elements (12, 16, 17, 20, 21, 22), the sensor device (40) having a target group (41) disposed on the moving elements (12, 16, 17, 20, 21, 22) and a sensor element having a sensor element that can be fixedly mounted on the loom and configured to detect the presence of targets (43, 44, 45) of the target group (41) within a sensing range. 42), wherein the target group (41) includes an upper target (43) and a lower target (45), wherein the drive mechanism (2) is configured to be operated to move the moving element (12, 16, 17, 20, 21, 22) such that the target group (41) passes the sensor element (42), wherein the control device (25) is configured to determine the upper target detection torque (63) in the textile cycle when the upper target (43) is detected and to determine the lower target detection torque (65) in the textile cycle when the lower target (45) is detected, characterized in that The target group (41) includes an intermediate target (44) arranged between the upper target (43) and the lower target (45), wherein the control device (25) is configured to determine an intermediate target detection torque (64) in a textile cycle when the intermediate target (44) is detected, and wherein the control device (25) is configured to determine the configuration of the drive mechanism (2) based on the upper target detection torque (63), the intermediate target detection torque (64) and the lower target detection torque (65), and the drive mechanism (2) is configured to operate according to the method of any one of claims 1 to 14.

16. The system according to claim 15, characterized in that, The sensor element (42) is a proximity sensor, wherein the target is a protrusion disposed on the moving element (12, 16, 17, 20, 21, 22), the protrusion being separated by a notch, wherein the sensor device (40) is configured to detect the rising edge of the target (43, 44, 45) with the sensor element (42) when the target (43, 44, 45) is moved into the sensing range.

17. The system according to claim 15, characterized in that, The sensor element (42) is a proximity sensor, wherein the target is a protrusion disposed at the side end of the moving element (12, 16, 17, 20, 21, 22), the protrusion being separated by a notch, wherein the sensor device (40) is configured to detect the rising edge of the target (43, 44, 45) with the sensor element (42) when the target (43, 44, 45) is moved into the sensing range.

18. The system according to claim 15 or 16, characterized in that, The system has a height detector (50) configured to detect the height detector torque of the heald frame (1) and determine the height position of the heald frame (1) based on the height detector torque and the configuration of the determined drive mechanism (2).

19. The system according to claim 18, characterized in that, Use the assumed movement profile type selected from multiple pre-stored movement profile types.

20. The system according to claim 19, characterized in that, The height detector (50) includes a height detector target (51) and a height detector sensor element (52) disposed on a frame (1) driven by the moving elements (12, 16, 17, 20, 21, 22).

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