CN107182004B - Stepping volume potentiometer and method for realizing volume adjustment through remote control - Google Patents
Stepping volume potentiometer and method for realizing volume adjustment through remote control Download PDFInfo
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- CN107182004B CN107182004B CN201710427642.3A CN201710427642A CN107182004B CN 107182004 B CN107182004 B CN 107182004B CN 201710427642 A CN201710427642 A CN 201710427642A CN 107182004 B CN107182004 B CN 107182004B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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Abstract
The invention discloses a stepping volume potentiometer and a method for realizing volume adjustment by remote control. The potentiometer comprises: the transmission gear (33) is fixed at the lower tail end of the main shaft (17), and the number of gear grooves of the transmission gear (33) is the same as that of the gear grooves of the adjusting gear (18); the stepping motor (31) with the eccentric wheel (32) drives the eccentric wheel (32) to rotate by the stepping motor (31), so that the eccentric wheel (32) can touch the transmission gear (33) in the process of rotating a circle, the transmission gear (33) correspondingly rotates by an angle of a gear groove, and the eccentric wheel (32) is separated from the transmission gear (33) when the stepping motor (31) stops working; and a control circuit board for receiving the volume adjustment control signal to control the operation of the stepping motor (31). The output volume of the potentiometer is remotely adjusted by driving the main shaft of the potentiometer to rotate through the stepping motor with the eccentric wheel, and the potentiometer has the advantages of simple structure, reliable work, less interference and the like.
Description
Technical Field
The invention relates to a potentiometer, in particular to a stepping volume potentiometer and a method for realizing volume adjustment through remote control.
Background
The traditional step volume potentiometer changes the potential by sliding a contact on a carbon film resistor, and has at least the following defects:
1. the contact repeatedly slides on the carbon film resistor, so that the carbon film resistor is easily damaged to cause inaccurate potential, and noise is easily generated because the contact is adhered to the carbon film resistor in the sliding process.
2. When the volume is manually adjusted through the gear shifting operation, the gear shifting device has no obvious gear shifting hand feeling, and the user experience is poor.
3. The potentiometer is matched with a pointer type mechanical gauge head to perform level indication, but the pointer type mechanical gauge head has a slow response speed, and the output signal of the potentiometer can be influenced when level sampling is performed.
Disclosure of Invention
The invention aims to solve the technical problem that a step-by-step volume potentiometer and a method for remotely controlling volume adjustment are provided aiming at the defects of the prior art, and the output volume of the potentiometer is remotely controlled and adjusted by driving a main shaft of the potentiometer to rotate through a step motor with an eccentric wheel.
The invention is realized by adopting the following technical scheme: a stepping volume potentiometer at least comprises a main shaft 17, a plurality of insulating substrates 13 sleeved on the main shaft 17, a volume adjusting circuit arranged on a plurality of insulating substrates 13, an adjusting gear 18 arranged at the upper tail end of the main shaft 17 and used for manually adjusting the volume, and a transmission gear 33 fixed at the lower tail end of the main shaft 17, wherein the number of gear grooves of the transmission gear 33 is the same as that of the gear grooves of the adjusting gear 18; the stepping motor 31 with the eccentric wheel 32 drives the eccentric wheel 32 to rotate by the stepping motor 31, so that the eccentric wheel 32 can touch the transmission gear 33 in the process of rotating a circle, the transmission gear 33 correspondingly rotates by an angle of a gear groove, and the eccentric wheel 32 is separated from the transmission gear 33 when the stepping motor 31 stops working; and a control circuit board for receiving a volume adjustment control signal to control the operation of the stepping motor 31. Volume adjustment based on remote control can be realized by controlling the rotation of the stepping motor, and manual volume adjustment and remote control volume adjustment are independent and do not interfere with each other, so that the operation of a user is facilitated.
In one embodiment, the step volume potentiometer further comprises a rotary torsion adjustable structure coupled to the adjustment gear 18, the rotary torsion adjustable structure comprising: a ball 21, a compression spring 22 which generates elastic force to make the ball 21 cling to one gear groove of the adjusting gear 18, one end of the compression spring 22 is connected with the ball 21, and the other end is connected with an adjusting screw 23. According to the technical scheme, the hand feeling of the potentiometer during manual volume adjustment gear shifting operation can be improved, and the user experience is improved.
In one embodiment, a sampling circuit 15 which is not electrically connected to the volume adjusting circuit is disposed on one of the insulating substrates 13, and the sampling circuit 15 is formed by connecting a plurality of sampling resistors with the same resistance in series. The technical scheme can accurately detect the volume output by the potentiometer without generating interference signals on the volume output signals of the potentiometer.
In one embodiment, the control circuit board comprises a controller, a communication module, a motor driving circuit, an amplifying circuit, an upgrading interface circuit and an output interface circuit, wherein the communication module, the motor driving circuit, the amplifying circuit, the upgrading interface circuit and the output interface circuit are connected with the controller; and the volume signal output end of the volume adjusting circuit is connected to the amplifying circuit through a lead, and the amplifying circuit is connected to one of the data ports of the controller.
In one embodiment, the communication module is a bluetooth module, an infrared module, a wireless network module, or a radio frequency communication module.
Correspondingly, the invention provides a method for remotely controlling a stepping volume potentiometer to realize volume adjustment, which comprises the following steps: a transmission gear 33 is arranged on a main shaft of the step volume potentiometer, and the number of gear grooves of the transmission gear 33 is the same as that of the gear grooves of the adjusting gear 18 for manually adjusting the volume; the control circuit board receives the volume adjustment control signal through the communication module, and generates a corresponding motor driving signal to control the rotation of the stepping motor 31; the stepping motor 31 drives the eccentric wheel 32 to rotate, so that the eccentric wheel 32 can touch the transmission gear 33 in the process of rotating for one circle, the transmission gear 33 correspondingly rotates for one gear groove angle, and the eccentric wheel 32 is separated from the transmission gear 33 when the stepping motor 31 stops working.
In one embodiment, the method for remotely controlling the volume adjustment by the step volume potentiometer further comprises the following steps: a sampling circuit 15 which is not electrically connected with the volume adjusting circuit is arranged in the step volume potentiometer, and the control circuit board judges the current volume of the step volume potentiometer according to the sampling voltage output by the sampling circuit 15; subtracting the current volume from the target volume of the volume adjustment control signal, and multiplying the current volume by the number of gear grooves of the transmission gear 33 to obtain the target number of turns of the stepping motor 31, wherein when the result of subtracting the current volume from the target volume is positive, the result indicates that the stepping motor 31 is in a clockwise rotation direction, otherwise, the result indicates that the stepping motor is in a counterclockwise rotation direction; a corresponding motor drive signal is generated based on the target number of rotations and direction of rotation of the stepper motor 31.
In one embodiment, the method for remotely adjusting the volume of the step volume potentiometer further comprises the following steps: the volume signal output end of the volume adjusting circuit is connected to the amplifying circuit of the control circuit board through a lead, so that the control circuit board obtains the amplitude of the volume signal output by the stepping volume potentiometer; and a controller of the control circuit board simulates and generates a meter head interface, and the current volume and the real-time volume signal amplitude are displayed on the meter head interface. The meter head interface generated through program language simulation does not need a driving circuit, simplifies the structure, has higher sensitivity, and can more accurately and timely display the current volume and the real-time volume signal amplitude.
In one embodiment, the method for remotely controlling the volume of the step-type volume potentiometer further comprises the step of performing self-upgrade through an upgrade interface circuit after the control circuit board obtains an upgrade data packet through the communication module. The self-upgrading provides realization conditions for realizing function expansion, function upgrading and the like of the potentiometer.
In addition, the invention has the advantages of simple structure, reliable work, less interference, good output tone quality and the like.
Drawings
Fig. 1 is an exploded view of the step volume potentiometer according to the present invention.
Fig. 2 is a schematic view of a connection structure of the stepping motor and the spindle.
Fig. 3 is a schematic diagram of a part of the structure of the step volume potentiometer for realizing the shift adjustment.
Fig. 4 is a schematic diagram of the internal structure of the step volume potentiometer according to the present invention.
Fig. 5 is a schematic structural diagram of a control circuit of the step volume potentiometer according to the present invention.
Detailed Description
As shown in fig. 1, 2, 3 and 4, the step volume potentiometer (hereinafter referred to as "potentiometer") includes: the device comprises a shell 11, a plurality of insulating base plates 13, a main shaft 17 and a plurality of upright posts 12 for connecting the shell 11 and the insulating base plates 13, wherein each insulating base plate 13 is sleeved on the main shaft 17 through a rotating part 16; a volume adjusting circuit 14 arranged on the plurality of insulating substrates 13, wherein the volume adjusting circuit 14 comprises a plurality of volume attenuation resistors connected in series; the main shaft 17 has an adjusting gear 18 at the upper end, and one tooth opening of the adjusting gear 18 corresponds to one gear of the volume adjustment. In addition, the volume adjusting circuit 14 has a plurality of terminals 19, the terminals 19 are exposed out of the housing 1, one terminal 19 is connected to one end of the volume adjusting circuit 14, the other terminal 19 is connected to the rotating portion 16, and the rotating portion 16 is correspondingly connected to a certain position of the volume adjusting circuit 14 along with the gear determined by the adjusting gear 18, so that the volume adjusting circuit 14 has different equivalent input resistances to correspondingly output different volumes (or level signals with different amplitudes) in different gears.
One of the technical problems to be solved by the invention is to improve the hand feeling of the potentiometer during the gear shifting operation for manually adjusting the volume and improve the user experience. Therefore, the invention sets a rotary torsion adjustable structure connected with the adjusting gear 18 in the step volume potentiometer, which comprises: a ball 21 arranged in contact with one of the gear grooves of the adjusting gear 18, a compression spring 22 having one end connected to the ball 21, and an adjusting screw 23 fixed to the housing 11 connected to the other end of the compression spring 22, wherein the ball 21 is tightly fitted into the gear groove of the adjusting gear 18 by an elastic force generated by the compression spring 22. In the process of gear shifting operation for manually adjusting the sound volume, the main shaft 17 is rotated, the ball 21 enters the next adjacent gear groove from the current gear groove along with the rotation of the size adjusting part 18, and the feeling of pause is generated, so that the hand feeling of the gear shifting operation is improved; and the adjusting screw 23 can be unscrewed or screwed to reduce or improve the elasticity of the pressure spring 22, so that the force required by gear shifting is reduced or improved, and the individual needs of users are met.
The invention aims to solve another technical problem that the output level signal of the potentiometer can be accurately detected without generating interference signals on the output volume signal of the potentiometer. According to the invention, the sampling circuit 15 is arranged on one of the insulating substrates 13, the sampling circuit 15 is not electrically connected with the volume adjusting circuit 14, and the sampling circuit 15 is formed by connecting a plurality of sampling resistors with the same resistance in series. For example, 50 gears are selected in the shift position of volume adjustment, that is, the adjusting gear 18 has 50 equidistant gear grooves, the sampling circuit 15 also includes 50 sampling resistors connected in series in sequence, and the 50 sampling resistors are uniformly arranged around the circumference of the main shaft 17, so that when the adjusting gear 18 rotates to adjust the volume, the rotating part 16 in the middle of the sampling circuit 15 also synchronously rotates at the same angle, so that the rotating part 16 correspondingly changes the position connected to the sampling circuit 15, and changes the equivalent resistor; a given voltage is given to one end of the sampling circuit 15, and the current volume can be judged according to the sampling voltage output from the rotating part 16 in the middle of the sampling circuit. For example, given voltage 10V, when the sampled voltage =10V corresponds to 100% of volume, the corresponding volume gear is the 50 th gear; when the sampling voltage =9V, the volume is 90% at this time, and the corresponding magnitude step is 45 th.
Another technical problem to be solved by the present invention is to provide a step volume potentiometer with remote volume adjustment. The invention is provided with a transmission gear 33 at the lower end of a main shaft 17 (the number of gear grooves of the transmission gear 33 is consistent with that of the gear grooves of an adjusting gear 18), and a stepping motor 31 with an eccentric wheel 32 is arranged in a shell 11; and the control circuit board is used for receiving the volume adjustment control signal to drive the stepping motor 31 to drive the eccentric wheel 32 to dial the transmission gear 33 to realize the automatic gear shifting function, and detecting the real-time volume and the output potential of the potentiometer.
The motor 31 drives the eccentric wheel 32 to rotate, and every time the eccentric wheel 32 rotates one circle, the farthest end of the eccentric wheel 32 touches the transmission gear 33 to enable the transmission gear 33 to rotate by the angle of one gear groove, and the transmission gear 33 drives the main shaft 17 to rotate by the angle of one gear groove, so that the volume adjustment is realized. Also, when the motor 31 is stopped, the farthest end 321 of the eccentric 32 is separated from the gear groove of the gear 33, so that there is no adverse hindering effect on the manual adjustment of the sound volume.
As shown in fig. 5, the control circuit board at least includes: the controller with control program, communication module, motor drive circuit, amplifier circuit, upgrading interface circuit and output interface circuit. The controller is generally realized by a singlechip, and the communication module can be a Bluetooth module, an infrared module, a wireless network module, a radio frequency communication module and the like.
A lead is led out from a binding post 19 connected with the volume adjusting circuit 14 and is connected to an amplifying circuit, and a potentiometer output level signal (volume signal) output from the binding post 19 is amplified by the amplifying circuit and then sampled by one data port of the controller to obtain the real-time amplitude of the potentiometer output level signal. The sampling voltage output by the sampling resistor is also transmitted to one data port of the controller, so that the current gear or the current volume of the potentiometer is obtained by the controller. The controller simulates a gauge head interface reflecting the volume of the potentiometer and the real-time volume signal amplitude and is connected with an external display through an output interface circuit, so that the gauge head interface is displayed on the display, and the current volume of the potentiometer and the real-time volume signal amplitude are displayed on the gauge head interface.
In addition, the control circuit board receives the volume adjustment control signal through the communication module, and the motor driving circuit generates a motor driving signal according to the volume adjustment control signal to control the rotation of the stepping motor 31. For example, when the volume control signal is to reduce the volume from 70% to 50%, if the number of gear slots of the transmission gear 33 is 50, the motor driving circuit controls the stepping motor 31 to rotate 10 times counterclockwise, and the eccentric gear 32 fluctuates the angle of 10 gear slots of the transmission gear 33 rotating 10 times counterclockwise; on the contrary, if the volume control signal is to increase the volume from 20% to 50%, the motor driving circuit controls the stepping motor 31 to rotate clockwise 15 times, so that the operation is simple and the operation is stable and reliable.
Moreover, the controller can be also provided with an upgrading interface circuit, such as a JTAG interface, and self-upgrading is carried out by receiving an upgrading data packet of a control program from an upper computer through the communication module, so that realizing conditions are provided for realizing function expansion, function upgrading and the like of the potentiometer.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The utility model provides a marching type volume potentiometer, includes main shaft (17) at least, establishes a plurality of insulating substrate (13) on main shaft (17) through a rotation portion (16) cover respectively, locates volume control circuit on wherein polylith insulating substrate (13), fixes adjusting gear (18) that end is used for manual regulation volume on main shaft (17), and adjusting gear (18) have a plurality of equidistance's gear groove, and its characterized in that still includes:
a sampling circuit (15) which is not electrically connected with the volume adjusting circuit is arranged on one of the insulating substrates (13), a given voltage is arranged at one tail end of the sampling circuit, the sampling circuit (15) is formed by connecting a plurality of sampling resistors with the same resistance in series, the plurality of sampling resistors are uniformly distributed around a main shaft (17) in a circumferential arrangement manner, a rotating part (16) positioned in the middle of the sampling circuit is correspondingly changed in the position connected with the sampling circuit when rotating to change the equivalent resistance of the sampling circuit (15), and sampling voltage representing the volume adjusting circuit corresponding to the output volume is output;
a transmission gear (33) fixed at the lower tail end of the main shaft (17), a stepping motor (31) with an eccentric wheel (32), wherein the stepping motor (31) drives the eccentric wheel (32) to rotate, so that the eccentric wheel (32) can touch the transmission gear (33) in the process of rotating a circle, the transmission gear (33) correspondingly rotates by an angle of a gear groove, and the eccentric wheel (32) is separated from the transmission gear (33) when the stepping motor (31) stops working; a control circuit board for receiving volume adjustment control signals to control the operation of the stepping motor (31);
the number of gear grooves of the transmission gear (33), the number of gear grooves of the adjusting gear (18) and the number of sampling resistors are equal.
2. The stepped volume potentiometer according to claim 1, further comprising a rotary torsion adjustment structure coupled to the adjustment gear (18), the rotary torsion adjustment structure comprising: a ball (21), a pressure spring (22) which generates elastic force to make the ball (21) tightly contact with one gear groove of the adjusting gear (18), one end of the pressure spring (22) is connected with the ball (21) and the other end is connected with an adjusting screw (23).
3. The step-type volume potentiometer according to claim 1, wherein the control circuit board comprises a controller, a communication module connected to the controller, a motor driving circuit, an amplifying circuit, an upgrading interface circuit and an output interface circuit; and the volume signal output end of the volume adjusting circuit is connected to the amplifying circuit through a lead, and the amplifying circuit is connected to one of the data ports of the controller.
4. The step-type volume potentiometer according to claim 3, wherein the communication module is a Bluetooth module, an infrared module, a wireless network module or a radio frequency communication module.
5. A method for realizing volume adjustment by remotely controlling a stepping volume potentiometer is characterized by comprising the following steps:
a transmission gear (33) is arranged on a main shaft of the step volume potentiometer, and the number of gear grooves of the transmission gear (33) is the same as that of gear grooves of an adjusting gear (18) for manually adjusting the volume;
a sampling circuit (15) which is not electrically connected with the volume adjusting circuit is arranged, and the control circuit board judges the current volume of the stepping volume potentiometer according to the sampling voltage output by the sampling circuit (15);
the control circuit board receives the volume adjustment control signal through the communication module and generates a corresponding motor driving signal to control the stepping motor (31) to rotate;
the stepping motor (31) drives the eccentric wheel (32) to rotate, so that the eccentric wheel (32) can touch the transmission gear (33) in the process of rotating a circle, the transmission gear (33) correspondingly rotates by an angle of a gear groove, and the eccentric wheel (32) is separated from the transmission gear (33) when the stepping motor (31) stops working;
the tail end of the sampling circuit is provided with a given voltage, the sampling circuit (15) is formed by connecting a plurality of sampling resistors with the same resistance in series, the sampling resistors are uniformly distributed in a circumferential arrangement mode around the main shaft (17), a rotating part (16) located in the middle of the sampling circuit correspondingly changes the position connected with the sampling circuit to change the equivalent resistor of the sampling circuit (15) when rotating, and the sampling voltage representing the corresponding output volume of the volume adjusting circuit is output.
6. The method for remotely controlling the volume of a step-type volume potentiometer according to claim 5, further comprising the steps of:
subtracting the current volume according to the target volume of the volume adjusting control signal, and multiplying the current volume by the number of gear grooves of the transmission gear (33) to obtain the target rotating circle number of the stepping motor (31), wherein when the result of subtracting the current volume from the target volume is positive, the result shows that the stepping motor (31) is in a clockwise rotating direction, otherwise, the result shows that the stepping motor is in a counterclockwise rotating direction;
a corresponding motor drive signal is generated based on the target number of rotations and the direction of rotation of the stepping motor (31).
7. The method of claim 6, further comprising the steps of:
the volume signal output end of the volume adjusting circuit is connected to the amplifying circuit of the control circuit board through a lead, so that the control circuit board obtains the amplitude of the volume signal output by the stepping volume potentiometer;
a meter head interface is generated by the simulation of a controller of the control circuit board, and the current volume and the real-time volume signal amplitude are displayed on the meter head interface.
8. The method of claim 5, further comprising the step of performing a self-upgrade via an upgrade interface circuit after the control circuit board obtains an upgrade data packet via the communication module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710427642.3A CN107182004B (en) | 2017-06-08 | 2017-06-08 | Stepping volume potentiometer and method for realizing volume adjustment through remote control |
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| CN201710427642.3A CN107182004B (en) | 2017-06-08 | 2017-06-08 | Stepping volume potentiometer and method for realizing volume adjustment through remote control |
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| CN107182004A CN107182004A (en) | 2017-09-19 |
| CN107182004B true CN107182004B (en) | 2022-09-13 |
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| CN201710427642.3A Active CN107182004B (en) | 2017-06-08 | 2017-06-08 | Stepping volume potentiometer and method for realizing volume adjustment through remote control |
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| CN108260041B (en) * | 2018-03-20 | 2023-12-01 | 广西钦州福晟电子有限公司 | Earphone volume adjusting potentiometer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7706558B2 (en) * | 2003-05-14 | 2010-04-27 | Domonic Sack | Automated system for adjusting line array speakers |
| CN200965636Y (en) * | 2006-09-06 | 2007-10-24 | 捷世达企业有限公司 | Linear actuator driving structure |
| CN201600892U (en) * | 2010-01-20 | 2010-10-06 | 天津市华音宇科工贸有限公司 | Intelligent automatic mixer with main volume remote control function |
| CN202374446U (en) * | 2011-12-07 | 2012-08-08 | 天津市华音宇科工贸有限公司 | Built-in digital frequency shifter sound frequency meeting main machine with remote controlling main volume function |
| KR20170029131A (en) * | 2015-09-07 | 2017-03-15 | 한진철 | remote control apparatus for potentiometer |
| CN207269264U (en) * | 2017-06-08 | 2018-04-24 | 深圳市百瑞科科技有限公司 | Step-by-step movement volume potentiometer |
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