JPH03501174A - A device for generating controlled movements - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The invention relates to a device for generating controlled movement of a device along a path; and more specifically, but not exclusively, audio or video signals and Motor-driven ferrules for use in studios to control lighting and/or lighting. Regarding the data.

Background of the invention In many applications, it is necessary to move equipment to a particular position or sequence of positions. is necessary. For example, in a studio, for lighting or audio equipment. move one or more sliders to a predetermined position. It may be necessary. Until now, it has DC electric motors, gearboxes, moving belts and This is done using well-known motor-driven faders that require It's here.

Summary of the invention According to one aspect of the invention, adjusting sound or lighting settings A motor-driven fader is provided for use in the , means for manual adjustment of the position of the slider, and a linear magnetic motor; This is a long electromagnet that extends at least the length of the slider's path of travel. , and a permanent magnet fixed to the slider, the magnetic axis of which is relative to the magnetic axis of the electromagnet. and is substantially vertical.

Since there is no mechanical or electrical coupling between the slider and the motor, the movement of the slider is The resistance to can be of very low order and therefore due to the slippage of the slider position. Allows for powerful and easy manual adjustment. In addition, there is a boob or gearbox inside the motor. Because there are no mechanical parts such as, the reliability and longevity of the device is substantially improved.

According to another aspect of the invention, generating controlled movement of a slidable member along a path; A motor-driven fader is provided for the slideable member along the path. manual control for manually positioning the fixed position extending at least the length of the path electromagnetic coil, circuit means for supplying direct current to the coil, manual fixed to the functional member and whose magnetic axis is relative to the magnetic axis of the coil and relative to the direction of movement. at least one permanent magnet mounted substantially vertically with one pole close to the coil; permanent magnet, which is also correlated with the manual control and connected within the circuit means, and therefore the sliding During manual movement of the movable member the current is reduced or cut off and the sliding It includes switch means for allowing the movable member to move freely.

The switch means may be touch sensitive.

Preferably, the position transducer means are associated with the slidable member and are arranged along the path. Electricity having parameters that vary in a known manner depending on the position of the slidable member Generate a signal.

In this manner, the direction of current flow supplied to the coil gives the desired direction of movement. The magnitude of the charging current can be controlled to achieve the desired acceleration and velocity of the slidable member. controlled to give

The position transducer preferably includes a resistive position track placed along the path. and which provides a signal to the circuit means in response to the position of the slidable member. adapted to.

The path of motion is typically linear.

Advantageously, the second coil is such that its magnetic axis is parallel to that of the first coil. and the spacing between the coils is such that each is close to the path of one of the poles of the magnet. It is.

The permanent magnet is preferably a rare earth magnet with high coercivity.

The preferred material for the magnet is neodymium, iron, and boron. Ru.

An alternative magnetic material is samarium cobalt.

This invention is useful for audio and Main for driving manual adjustable controls within the console for controlling the lighting It is an applied thing. However, other similar applications are possible and they are for example in robotics, telemetry, remote control and steering systems. Yes, and generally any activation that includes and prepares for manual overrides. In the adjusted regulator.

By using linear magnetic motors, larger A large potential accuracy can be obtained, in which a low redrive such as a DC motor can be used. , the motion is given in incremental steps.

Brief description of the drawing The invention will now be described by way of example only with reference to the accompanying drawings, shown in the figures Leave it behind. FIG. 1 shows a drive for a fader configured as one embodiment of the invention. FIG. 2 is a schematic diagram of a unit configured as a second embodiment of the invention. FIG. 3 is a perspective view of a drive unit for driving a fader, and FIG. 3 is the same as that in FIG. FIG. 2 is a side view, partially in section, of the drive unit; FIG. 4 is a cross section along line IV-TV in FIG. 3 and including the fader; Figure 5 shows the controls for the motor-driven fader drive unit of Figures 2 to 4. FIG. 3 is a circuit diagram of a control circuit.

specific description In FIG. 1, a slidable member 10 is slidable along a track 12 and permanently It includes a permanent magnet 14 and a sliding contact 16 of a linear potentiometer 18.

positioned in close proximity to the permanent magnet 14 and parallel to the track 12 There is an electromagnetic coil 20 wound on a magnetizable core 22 .

The end of the coil 20 is electrically connected to a control unit 24, which incorporates a memory. and supply sufficient direct current to the coil to move the member 10 along the track 12. and can cause The magnitude and direction of such drive current depends on the input data at 26. It can be in analog or digital form . Among such input data are feedback control signals, which 16 and it is provided to control unit 24 via signal path 30. be provided.

It will be appreciated that more than one coil may be used, such as 20 . Furthermore, two or more cores 22 may be used and these It may be in the form of a tube or disc.

Track 12 may be an integral part of the magnetic assembly.

The device requires that the device be moved along a track to a predetermined position. or requires the member to be moved at a desired speed or acceleration. 5 for any system that must allow manual overrides. can also be given.

Where unit 24 has memory, this may have been previously set by manual override. Stores multiple different settings or programmed movements made and that the sequence of movements is repeated when it is needed possible.

Figures 2 to 4 show drive units for faders, which can be linked to the movable element of the device and be mounted alongside other similar devices. A console for use in recording studios, theaters, etc. control a number of parallel faders within the

The outer casing 30 and end molding 32 are mounted parallel to each other, one on top of the other. A pair of attached sliding rails 34 are supported. The rail 34 is made of non-magnetic material. and the carriage 36 for the strong permanent magnet 38 can slide along it. It is. Magnets are made of rare earth materials such as neodymium, iron, boron, or samarium and cobalt. 4, and its N-S axis is connected to the rail 34 as shown in FIG. placed horizontally to the axis of

A pair of coils 39 and 40 wound on the cores 42 and 43 are located on both sides of the magnet 38, respectively. positioned above. The core 42,43 is of rectangular cross section and made of iron or Formed from other high magnetoresistive materials. The wire in each winding typically has a diameter of 0. 1.5 mm, and the coil is tightly wound in 8 layers.

A control knob 44 extends from the carriage 36 so that the latter can be manually operated along the rail 34. allow you to be moved.

Opposed to the upper rail 34 is a linear resistance track 52 having a total electrical resistance of 10 ohms. It is placed as The movable carriage 36 holds a pair of electric wires 54, which contact with the track 52; The resistance measured from one end of the track 52 to the wiper 54 is Provides a position reference signal.

The windings 40 are arranged in parallel, and the direction of the magnetic field generated in one coil is opposite to the other. is connected to a 30 volt DC supply in a manner opposite to that of the coil. the current The magnetic field generated by the current and that of the permanent magnet 38 as it flows through the windings The interaction between leads to distortion of the magnetic field, which generates a net force on the carriage. , that direction will cause the latter to slide along the rail 34. Noriyoshi Typical, a force of about 2 newtons is applied using a 30 megagauss-ersted magnet. observed.

The arm 56 extends below the carriage 36 and is connected to the movable control element of the fader 59. The movement is transmitted to the port 57 (see FIG. 4).

FIG. 5 is a control circuit for the drive unit of FIGS. 2-4.

The upper half of the circuit diagram is the servo control circuit, while the lower half shows if knob 44 Gives an electrical signal (and therefore becomes grounded or (either with an ambient radiating trunk limb applied to it by hand), and with an electric It works by interrupting the flow of current from the power supply to the motor in response to electrical signals.

The voltage from wiper 54 is applied to the servo control, which is applied by operational amplifier 60. buffered to provide one input to comparator 62, the other input of which is Supplied by a virtual ground summing amplifier 64, the gain of which is determined by the feedback resistor. 66 to set the amount of damping.

The output from amplifier 60, designated as “5ERVOOUT”, is output to the external control unit. 1 (similar to control unit 24 in FIG. 1), while “C0 The input to amplifier 68, designated as “NTR0L IN”, is from the external control unit. Provides supply to the motor.

Two back-to-back diodes 70, 72 can be connected to any desired position of the carriage 36. The magnitude of the hysteresis of the comparator 62 is adjusted to prevent vibrations around the Adjust.

The output stage is driven by a phase splitter 74,76 and to a motor (not shown). four power transistors 7 arranged in a bridge circuit to control the current of Contains 8.80.82.84. The value of the current depends on the desired position and trajectory of the carriage 36. to the desired position determined by the distance between the actual position indicated by 52 The speed of approach is also taken into account.

According to the invention, as soon as the knob 44 is touched by hand, the current to the motor is reduced. or cut off, allowing free movement of the control knob and therefore The only resistance to this is the friction associated with the sliding rail 34. This cascades CMO5 device 86, 88.9 connected and with very high input impedance This is accomplished by o.

The input to device 86 is connected to manual control knob 44 through an ohmic resistor 92 at 100. and is itself an electrically conductive material. If the knob 44 is If touched by the thumb, the surface conductivity of the skin will create an earth leakage or device 8 It is sufficient for either to introduce peripheral trunk hams for 6 and their Which of the conditions causes the triggering of device 86 and therefore device 88, This creates a voltage increase across resistor 94 and ensures that device 90 is fully conductive and This causes the output terminal 96 to shift from +5V to 10.7V.

This is the driver in the input of device 76 in phase split/driver stage 74.76. switch 98 and ensure that power transistors 78-84 are turned off. Immediately bring and in turn remove drive current from the motor.

Claims (10)

[Claims] 1. Useful in driving manually adjustable controls for audio or lighting It is a motor driven fader, it is a slider, the hand of the slider position adjustment means for dynamic adjustment, and a linear magnetic motor, which comprises at least a longitudinal electromagnet extending the length of the slider's path of motion; a permanent magnet fixed to the slider, the axis of which is substantially perpendicular to the magnetic axis of the electromagnet; Including motor-driven faders. 2. circuit means for supplying direct current to the electromagnet, interrelated with the regulating means and switch means connected within the circuit means, thus manually controlling the slider; During movement, the direct current to the electromagnet is reduced or cut off to 2. The fader according to claim 1, wherein the fader allows the fader to move freely. 3. 3. A fader according to claim 2, wherein the switch means is touch sensitive. 4. A position transducer is correlated to the slider and the position of the slider along the path generating in circuit means an electrical signal having parameters that vary in a well-known manner depending on the 4. The fader according to claim 2 or claim 3. 5. A position transducer is placed along the path and corresponds to the position of the slider. 5. A resistive position track adapted to provide a signal to the circuit means according to claim 4. Fader mentioned. 6. A face according to any one of the preceding claims, wherein the path of movement is linear. Da. 7. A second electromagnet is placed with its magnetic axis parallel to that of the first electromagnet. and the spacing between them is such that each electromagnet is relative to the path of one of the poles of the permanent magnet. A fader according to any one of the preceding claims, wherein the fader is similar to one another. 8. Any of the preceding claims, wherein the permanent magnet is a rare earth magnet with high coercive force. Fader mentioned in one. 9. 9. The magnet according to claim 8, wherein the material for the permanent magnet is neodymium-iron-boron. Aeda. 10. 9. The material of claim 8, wherein the material for the permanent magnet is samarium cobalt. Fader.