CN104966596B - Potentiometer and its calibration method, system and sound volume control device, electronic equipment - Google Patents
Potentiometer and its calibration method, system and sound volume control device, electronic equipment Download PDFInfo
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- CN104966596B CN104966596B CN201510409592.7A CN201510409592A CN104966596B CN 104966596 B CN104966596 B CN 104966596B CN 201510409592 A CN201510409592 A CN 201510409592A CN 104966596 B CN104966596 B CN 104966596B
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Abstract
The present invention relates to a kind of potentiometer and its calibration method, system and sound volume control device, electronic equipment, its potentiometer includes resistive element, the first pin, second pin, the 3rd pin, the 4th pin, switch, protective resistance and moveable brush；First pin is connected with the brush; the second pin connects one end of the resistive element; 3rd pin connects the other end of the resistive element; one end of the protective resistance connects the second pin; the other end of the protective resistance connects one end of the switch and the 4th pin respectively; the other end of the switch connects the 3rd pin; the influence of residual resisitance can be eliminated; when in applied to the control of the volume of electronic equipment, it can make it that the volume of output is more accurate.
Description
Technical field
The present invention relates to electronic technology field, more particularly to a kind of potentiometer, a kind of calibration method of potentiometer and it is
System, a kind of sound volume control device including the potentiometer, a kind of electronic equipment including the sound volume control device.
Background technology
Potentiometer is a kind of important electronic device, is widely used in electronic product.In audio area, control is usually used to
The size of electronic product output volume processed.
As shown in figure 1, the potentiometer of simply connected generally comprises moveable arm, contact brush, resistive element and 3 pins at present, can
To change the position of contact brush by way of rotating contact brush, and then change the size of the output voltage shown in Fig. 1, play tune
The purpose of the size for sub- output of products volume of economizing on electricity.Multi-joint potentiometer is typically that (n represents potentiometer with 3*n pin
Join number), for example, duplex potentiometer, has 6 pins, it is made up of two groups of simply connected potentiometers, the operation principle of multi-joint potentiometer
It is similar to the operation principle of the potentiometer of simply connected.
But potentiometer was previously used after a period of time, being rotated in contact brush makes the resistance between pin 1 and pin 3
Resistance it is minimum when, the resistance of the resistance between pin 1 and pin 3 should be 0 ohm, but due to moveable arm, contact brush (this
Both are also collectively referred to as brush) abrasion, resistance becomes greater than 0 ohm by 0 ohm, has certain residual resisitance.And export
The size of volume is obtained by gathering the output voltage size of potentiometer again, due to the presence of residual resisitance, output volume
Also tend to become inaccurate.
The content of the invention
Include the current potential it is an object of the invention to a kind of potentiometer, a kind of calibration method of potentiometer and system, one kind
The sound volume control device applied to electronic equipment, a kind of electronics for the sound volume control device that electronic equipment is applied to including this of device
Equipment, can eliminate the influence of residual resisitance, when in applied to the control of the volume of electronic equipment, can cause the volume of output
It is more accurate.
The purpose of the present invention is achieved through the following technical solutions：
A kind of potentiometer, including resistive element, the first pin, second pin, the 3rd pin, the 4th pin, switch, protection electricity
Resistance and moveable brush；
First pin is connected with the brush, and the second pin connects one end of the resistive element, the described 3rd
Pin connects the other end of the resistive element, and one end of the protective resistance connects the second pin, the protective resistance
The other end connects one end of the switch and the 4th pin respectively, and the other end connection the described 3rd of the switch is drawn
Pin.
A kind of calibration method of above-mentioned potentiometer, comprises the following steps：
Monitor the level of the 4th pin；
If monitoring, the mutation of predefined type occurs for the level of the 4th pin, records the current of first pin
Voltage, using the current voltage as the potentiometer residual voltage；
The output voltage of first pin is calibrated according to the residual voltage；
Wherein, the switch carries out state switching when the brush is rotated to target location, the 4th pin
In the switch carry out state switching mutation of the predefined type occurs for level.
A kind of calibration system of above-mentioned potentiometer, including：
Monitoring unit, the level for monitoring the 4th pin；
Recording unit, if for monitoring that the mutation of predefined type occurs for the level of the 4th pin, recording described
The current voltage of first pin, using the current voltage as the potentiometer residual voltage；
Alignment unit, for being calibrated according to the residual voltage to the output voltage of first pin；
Wherein, the switch carries out state switching when the brush is rotated to target location, the 4th pin
In the switch carry out state switching mutation of the predefined type occurs for level.
A kind of sound volume control device applied to electronic equipment, including above-mentioned potentiometer.
A kind of electronic equipment, including the above-mentioned sound volume control device applied to electronic equipment.
According to the scheme of the invention described above, because the potentiometer of the present invention with the addition of one on the basis of traditional potentiometer
Pin (the 4th pin) and a switch, using the potentiometer of this structure, it is only necessary to which the switch is rotated in the brush
Carry out state switching during to target location (position for making resistance between the first pin and the 3rd pin minimum), then the described 4th
The level of pin can just undergo mutation in the switch carry out state switching, can be by monitoring the level of the 4th pin
At the time of the no mode undergone mutation determines that brush is rotated to target location, and then obtain residual voltage (residual resisitance correspondence
The first pin output voltage), the output voltage of the first pin is calibrated according to the residual voltage, remaining electricity is eliminated
The influence of resistance, when in applied to the control of the volume of electronic equipment, can make it that the volume of output is more accurate.
Brief description of the drawings
Fig. 1 is the structure chart (a) and schematic diagram (b) of the potentiometer of current simply connected；
Fig. 2 is the structural representation of the potentiometer embodiment of the present invention；
Fig. 3 is the schematic diagram of the potentiometer of the embodiment of the present invention；
Fig. 4 is the schematic flow sheet of the calibration method embodiment of the potentiometer of the present invention；
Fig. 5 is the structural representation of the calibration system embodiment of the potentiometer of the present invention；
Fig. 6 is the structural representation of the sound volume control device applied to electronic equipment of the present invention.
Embodiment
For the objects, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with drawings and Examples, to this
Invention is described in further detail.It should be appreciated that embodiment described herein is only to explain the present invention,
Do not limit protection scope of the present invention.
It is shown in Figure 2, it is the structural representation of the potentiometer embodiment of the present invention.As shown in Fig. 2 the electricity of the present embodiment
Position device includes resistive element Rp, the first pin Pin1, second pin Pin2, the 3rd pin Pin3, the 4th pin Pin4, switch S, guarantor
Protect resistance R0 and moveable brush Rz；
First pin Pin1 is connected with brush Rz, second pin Pin2 connection resistive elements Rp one end, the 3rd pin Pin3
Connect the resistive element Rp other end, protective resistance R0 one end connection second pin Pin2, protective resistance R0 other end difference
Connecting valve S one end and the 4th pin Pin4, the switch S other end connect the 3rd pin Pin.
Wherein, brush Rz can specifically include moveable arm, contact brush, and brush Rz movement can refer to brush Rz rotation.
For the ease of understanding the solution of the present invention, the principle to the potentiometer of the present invention is illustrated below.
It is shown in Figure 3, it is the principle schematic of the potentiometer embodiment of the present invention.When implementing, such as Fig. 3 institutes
Show, after the potentiometer of the multiplefrequency mixer of the present invention comes into operation, second pin Pin2 connection power end VCC, the 3rd pin
Pin3 is grounded, and protective resistance R0 can be prevented when switching S closures, the appearance of direct short-circuit between power end VCC and ground.
If the resistance of the resistance between second pin Pin2 and the 3rd pin Pin3 is RAlways, the first pin Pin1 draws with second
Resistance between pin Pin2 is R1, the resistance between the first pin Pin1 and the 3rd pin Pin3 is R2, input voltage is Vi, it is defeated
Go out voltage then Vo, then, and RAlways=R1+R2、Vo=Vi*R1/RAlways, here, input voltage is to be added in second pin Pin2 and the 3rd pin
Voltage difference between Pin3, output voltage is the voltage difference between the first pin Pin1 and the 3rd pin Pin3.
R can be changed by shifting brush Rz1、R2Size, towards R2The direction shifting brush Rz diminished, when it is mobile not
When dynamic, i.e. R2When minimum, closure switch S (other positions switch S is in off-state), the level of the 4th pin Pin4 outputs
Occur by high level to low level mutation, record now the first pin Pin1 output voltage, now the first pin Pin1
Output voltage be resistor residual voltage, residual voltage causes by residual resisitance, then can be according to the residual voltage school
The output voltage of the first pin Pin1 when quasi- brush Rz is in optional position, specifically, can be according to Vo'=Vo-VIt is residualCarry out school
Standard, wherein, VIt is residualRefer to residual voltage, Vo' refer to the voltage after calibration, the output volume and V of electronic equipmento' corresponding, so, eliminate
The influence of the residual resisitance of potentiometer, when brush Rz is moved to makes R2During the position of minimum, the volume of the output of electronic equipment
It would not malfunction.
According to the potentiometer of the invention described above, the present invention also provides a kind of calibration method of the potentiometer, referring to Fig. 4 institutes
Show, be the schematic flow sheet of the calibration method embodiment of the potentiometer of the present invention.As shown in figure 4, the potentiometer of the present embodiment
Calibration method comprises the following steps：
Step S101：Monitor the 4th pin Pin4 level；
Step S102：If monitoring, the mutation of predefined type occurs for the 4th pin Pin4 level, records the first pin
Pin1 current voltage, using the current voltage as the potentiometer residual voltage；
Step S103：The first pin Pin1 output voltage is calibrated according to the residual voltage；
Wherein, switch S carries out state switching when brush Rz is moved to target location, and the 4th pin Pin4 level exists
Switch S carries out occurring the mutation of the predefined type during state switching.
Here, the target location refers to R2The location of brush Rz when minimum, i.e. Fig. 2 center brush Rz can be moved to
Extreme lower position.
Here, the predefined type is included by high level to low level or by low level to high level.If switch S exists
The state switching carried out when brush Rz is moved to target location be by the switching of off-state to closure state, then it is described to make a reservation for
Type refers to by high level to low level, if the state switching that switch S is carried out when brush Rz is moved to target location is by closing
Conjunction state to off-state switching, then the predefined type refer to by low level to high level.
Here, the output voltage being calibrated can brush Rz be in optional position when the first pin Pin1 exported
Voltage, and residual voltage voltages for being exported of the first pin Pin1 when to be only brush Rz be in target location, and it is remaining in record
During voltage (current voltage described in step S102), the state for switching S is not required, can be closure state, can also
It is off-state.
Using the calibration method of the potentiometer of above-described embodiment, the influence of residual resisitance can be eliminated, applied to electronics
When in the volume control of equipment, it can make it that the volume of output is more accurate.
According to the calibration method of the potentiometer of the invention described above, the present invention also provides a kind of calibration system of potentiometer, joins
As shown in Figure 5, be the present invention potentiometer calibration system embodiment structural representation.As shown in figure 5, the electricity of the present embodiment
The calibration system of position device includes：
Monitoring unit 201, the level for monitoring the 4th pin；
Recording unit 202, for monitoring that the prominent of predefined type occurs for the level of the 4th pin in monitoring unit 201
Become, record the current voltage of first pin, using the current voltage as the potentiometer residual voltage；
Alignment unit 203, for being calibrated according to the residual voltage to the output voltage of first pin；
Wherein, switch S carries out state switching when brush Rz is rotated to target location, and the 4th pin Pin4 level exists
Switch S carries out occurring the mutation of the predefined type during state switching.
The technical characteristic and its advantage illustrated in the embodiment of the calibration method of above-mentioned potentiometer is applied to current potential
In the embodiment of the calibration system of device, it will not be described here.
According to the potentiometer of the invention described above, the present invention also provides a kind of sound volume control device applied to electronic equipment,
Including the potentiometer in above-mentioned any embodiment.
In one of the embodiments, the sound volume control device applied to electronic equipment of the invention, as shown in fig. 6, also
Can include microcontroller (Micro Control Unit, MCU) 301, microcontroller 301 connect respectively the first pin Pin1,
4th pin Pin4, specifically, the first pin Pin1, the 4th pin Pin4 can connect the different I/O of microcontroller 301 respectively
(input/output, input and output) port；
Microcontroller 301 is used for the level for monitoring the 4th pin Pin4, if monitoring, the 4th pin Pin4 level occurs
The mutation of predefined type, records the first pin Pin1 current voltage, regard the current voltage as the residual of the potentiometer
Remaining voltage, is calibrated according to the residual voltage to the first pin Pin1 output voltage, according to the output voltage after calibration
The volume output of control electronics；Wherein, switch S carries out state switching, the 4th when brush Rz is rotated to target location
When switching S progress state switchings the mutation of the predefined type occurs for pin Pin4 level.
Wherein, being exported according to the volume of the output voltage control electronic equipment after calibration can use what can arbitrarily be realized
Mode, will not be described here.
In one of the embodiments, the sound volume control device applied to electronic equipment of the invention can also include connection
Brush Rz and switch S mechanical device, the mechanical device are used to drive switch S to carry out when brush Rz is rotated to target location
State switches.
The technical characteristic and its advantage illustrated in the embodiment of above-mentioned potentiometer, the calibration method of potentiometer is also suitable
In the embodiment applied to the sound volume control device of electronic equipment, it will not be described here.
According to the potentiometer of the invention described above, the present invention also provides a kind of electronic equipment, including any one above-mentioned implementation
The sound volume control device applied to electronic equipment in example, can eliminate the influence of residual resisitance, can when carrying out volume control
To cause the volume of output more accurate.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (9)
1. a kind of potentiometer, it is characterised in that including resistive element, the first pin, second pin, the 3rd pin, the 4th pin, open
Pass, protective resistance and moveable brush；
First pin is connected with the brush, and the second pin connects one end of the resistive element, the 3rd pin
Connect the other end of the resistive element, one end of the protective resistance connects the second pin, the protective resistance it is another
End connects one end of the switch and the 4th pin respectively, and the other end of the switch connects the 3rd pin；
The potentiometer is calibrated by calibration system, and the calibration system includes monitoring unit, recording unit and alignment unit；Institute
State the level that monitoring unit is used to monitor the 4th pin；The recording unit is described for being monitored in the monitoring unit
The mutation of predefined type occurs for the level of the 4th pin, the current voltage of first pin is recorded, by the current voltage
It is used as the residual voltage of the potentiometer；Alignment unit, for according to output electricity of the residual voltage to first pin
Pressure is calibrated.
2. a kind of calibration method of potentiometer as claimed in claim 1, it is characterised in that comprise the following steps：
Monitor the level of the 4th pin；
If monitoring, the mutation of predefined type occurs for the level of the 4th pin, records the current electricity of first pin
Pressure, using the current voltage as the potentiometer residual voltage；
The output voltage of first pin is calibrated according to the residual voltage；
Wherein, the switch carries out state switching, the level of the 4th pin when the brush is rotated to target location
Occurs the mutation of the predefined type in the switch carry out state switching.
3. the calibration method of potentiometer according to claim 2, it is characterised in that the predefined type is included by high level
To low level or by low level to high level.
4. a kind of calibration system of potentiometer as claimed in claim 1, it is characterised in that including：
Monitoring unit, the level for monitoring the 4th pin；
Recording unit, if for monitoring that the mutation of predefined type occurs for the level of the 4th pin, recording described first
The current voltage of pin, using the current voltage as the potentiometer residual voltage；
Alignment unit, for being calibrated according to the residual voltage to the output voltage of first pin；
Wherein, the switch carries out state switching, the level of the 4th pin when the brush is rotated to target location
Occurs the mutation of the predefined type in the switch carry out state switching.
5. the calibration system of potentiometer according to claim 4, it is characterised in that the predefined type is included by high level
To low level or by low level to high level.
6. a kind of sound volume control device applied to electronic equipment, it is characterised in that including current potential as claimed in claim 1
Device.
7. the sound volume control device according to claim 6 applied to electronic equipment, it is characterised in that also including microcontroller
Device, first pin of connection respectively, the 4th pin of the microcontroller；
The microcontroller is used for the level for monitoring the 4th pin, if monitoring, the level of the 4th pin occurs to make a reservation for
The mutation of type, records the current voltage of first pin, and the remnants of the current voltage as the potentiometer are electric
Pressure, is calibrated according to the residual voltage to the output voltage of first pin, according to the output voltage control after calibration
The volume output of electronic equipment, wherein, the switch carries out state switching when the brush is rotated to target location, described
In the switch carry out state switching mutation of the predefined type occurs for the level of the 4th pin.
8. the sound volume control device according to claim 6 applied to electronic equipment, it is characterised in that also including connecting respectively
Connect the mechanical device of the brush and the switch；
The mechanical device is used to drive the switch carry out state switching when the brush is rotated to target location.
9. a kind of electronic equipment, it is characterised in that including the sound applied to electronic equipment as described in one of claim 6 to 8
Amount control device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510409592.7A CN104966596B (en) | 2015-07-13 | 2015-07-13 | Potentiometer and its calibration method, system and sound volume control device, electronic equipment |
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| CN201510409592.7A CN104966596B (en) | 2015-07-13 | 2015-07-13 | Potentiometer and its calibration method, system and sound volume control device, electronic equipment |
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| CN104966596B true CN104966596B (en) | 2017-09-22 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107014429A (en) * | 2017-03-28 | 2017-08-04 | 厦门芯阳科技股份有限公司 | A kind of method that controling parameter is adjusted by potentiometer |
| CN109449904B (en) * | 2018-12-17 | 2024-02-13 | 南方电网科学研究院有限责任公司 | Rotary variable current limiter and rotary variable impedance current limiting device |
| CN111489531B (en) * | 2019-01-29 | 2021-12-24 | 杭州海康威视数字技术股份有限公司 | Method for adapting to line tail resistance of alarm host, electronic device and storage medium |
| CN115101275B (en) * | 2022-05-18 | 2023-07-14 | 北京石油化工学院 | Potentiometer device and method for determining closing number of shifting switch |
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| CN101175975A (en) * | 2005-05-18 | 2008-05-07 | E.G.O.电气设备制造股份有限公司 | Method for evaulating a potentiometer and circuit arrangement having a potentiometer |
| CN202887894U (en) * | 2012-05-23 | 2013-04-17 | 上海海希工业通讯设备有限公司 | Novel high-accuracy potentiometer with switch |
| CN202977045U (en) * | 2012-11-07 | 2013-06-05 | 天津市承刚科技发展有限公司 | Patch type potentiometer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0677018A (en) * | 1992-08-28 | 1994-03-18 | Murata Mfg Co Ltd | Focus pack |
| JPH10256008A (en) * | 1997-03-11 | 1998-09-25 | Matsushita Electric Ind Co Ltd | Potentiometer with switch |
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- 2015-07-13 CN CN201510409592.7A patent/CN104966596B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101175975A (en) * | 2005-05-18 | 2008-05-07 | E.G.O.电气设备制造股份有限公司 | Method for evaulating a potentiometer and circuit arrangement having a potentiometer |
| CN202887894U (en) * | 2012-05-23 | 2013-04-17 | 上海海希工业通讯设备有限公司 | Novel high-accuracy potentiometer with switch |
| CN202977045U (en) * | 2012-11-07 | 2013-06-05 | 天津市承刚科技发展有限公司 | Patch type potentiometer |
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