CN108414871A - A kind of abnormal automatic testing method and the system of opening a way of potentiometer - Google Patents
A kind of abnormal automatic testing method and the system of opening a way of potentiometer Download PDFInfo
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- CN108414871A CN108414871A CN201810099105.5A CN201810099105A CN108414871A CN 108414871 A CN108414871 A CN 108414871A CN 201810099105 A CN201810099105 A CN 201810099105A CN 108414871 A CN108414871 A CN 108414871A
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- Prior art keywords
- pin
- potentiometer
- open circuit
- voltage
- level signal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- General Physics & Mathematics (AREA)
- Adjustable Resistors (AREA)
Abstract
A kind of potentiometer of the present invention offer open circuit automatic testing method and system extremely, potentiometer open circuit automatic testing method extremely include the following steps：Judge that the fixed pin of two, potentiometer is abnormal with the presence or absence of open circuit, if any fixed pin in two fixed pins has open circuit abnormal, stops detecting；When the sliding pin of potentiometer is located at a certain position on resistive element, two fixed pins are measured respectively and slide the voltage between pin；The sum of two measured voltage is compared with supply voltage, judges that the sliding pin of potentiometer is abnormal with the presence or absence of open circuit.Potentiometer provided by the invention open circuit automatic testing method extremely, by the way that potentiometer open circuit detecting system extremely is arranged in stepping electrical appliance, electrical appliance is at work, short-circuit with the presence or absence of exception by the fixation pin and sliding pin that judge potentiometer, monitors the exception of electrical appliance in real time.
Description
Technical field
The present invention relates to potentiometer detection field, more particularly to a kind of potentiometer open circuit automatic testing method extremely and it is
System.
Background technology
In existing market, potentiometer occupies critical positions in stepping electrical appliance, thus the stability of potentiometer and
Accuracy is that all designers consider the problems of emphatically.Potentiometer sliding end leans on mechanical structure contact resistance face, therefore is easy
Being caught in by the bad either foreign matter of Mechanical Contact causes sliding end resistance value abnormal or because failure welding leads to the open circuit of pin, most
Cause entire working body gear unstable eventually or regulation stall failure.As flatiron is tired be easy to press in the clothes of unlike material it is bad,
Even catch fire；Such as grillING class equipment, which is easy to happen food and can not bake or burn the problem of directly affecting user experience, to be sent out
It is raw.Often to be spent as manufacturing person larger energy shipment prepotential device detection above.Therefore how not dismantle
Potentiometer is carried out abnormality detection in the case of potentiometer and its important.
Invention content
To solve the above problems, the present invention provides a kind of potentiometer exception open circuit automatic testing method, include the following steps：
S110：Judge that the fixed pin of two, potentiometer is abnormal with the presence or absence of open circuit, if any solid in two fixed pins
Determining pin has open circuit abnormal, then stops detecting；
S120：When the sliding pin of potentiometer is located at a certain position on resistive element, two fixed pins are measured respectively
With the voltage between sliding pin；
S130：The sum of two voltage measured by S120 is compared with supply voltage, judges that the sliding of potentiometer is drawn
Foot is abnormal with the presence or absence of open circuit.
Further, the fixed pin of two, potentiometer is judged in S110, and with the presence or absence of open circuit exception, the specific method is as follows：
By the fixed pin input high level signal of one of two fixed pins, another is fixed pin and is in high-impedance state, measures
The voltage for sliding pin, judges whether the voltage for sliding pin is equal to high level voltage, if equal, input high level signal
There is no abnormal open circuit in fixed pin.
Further, S130 judges the sliding pin of potentiometer abnormal the specific method is as follows with the presence or absence of open circuit：By two
The fixed pin input high level signal of one of a fixed pin, another fixes pin input low level signal, measures
Voltage U1 between the fixation pin and sliding pin of input low level signal；By the fixation pin of original input high level signal
Input low level signal, originally the fixation pin input high level signal of input low level signal measure input low level signal
Fixation pin and sliding pin between voltage U2；Judge whether the sum of voltage U1 and voltage U2 are equal with supply voltage, if
It is equal, then it slides pin and there is no abnormal open circuit.
The present invention also provides a kind of potentiometer open circuit automatic checkout system, including control system extremely, detecting system judges
System；
The signal that control system is used to control the sliding pin of input potentiometer is high level signal, low level signal and height
Resistance state signal；
Detecting system is for detecting the voltage when pin of potentiometer is in different conditions；
Judgement system is used to judge that the pin of potentiometer is opened a way with the presence or absence of abnormal according to the voltage that detecting system detects.
Further, the control system is microcontroller.
Potentiometer provided by the invention open circuit automatic testing method extremely, it is different by the way that potentiometer is arranged in stepping electrical appliance
Normally opened road detecting system, electrical appliance at work, whether there is abnormal by the fixation pin and sliding pin that judge potentiometer
Short circuit monitors the exception of potentiometer in electrical appliance in real time.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Some bright embodiments for those of ordinary skill in the art without having to pay creative labor, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is potentiometer provided by the invention open circuit automatic testing method flow chart extremely；
Fig. 2 is potentiometer open circuit automatic checkout system circuit diagram extremely.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term "center", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as pair
The limitation of the present invention.In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply opposite
Importance.
Fig. 1 is potentiometer provided by the invention open circuit automatic testing method flow chart extremely, as shown in Figure 1：Potentiometer is different
Normally opened road automatic testing method, includes the following steps：
S110：Judge that the fixed pin of two, potentiometer is abnormal with the presence or absence of open circuit, if any solid in two fixed pins
Determining pin has open circuit abnormal, then stops detecting；
Preferably, the fixed pin of two, potentiometer is judged in S110, and with the presence or absence of open circuit exception, the specific method is as follows：It will
The fixed pin input high level signal of one of two fixed pins, another is fixed pin and is in high-impedance state, measures and slides
The voltage of dynamic pin, judges whether the voltage for sliding pin is equal to high level voltage, if equal, input high level signal is consolidated
Determine pin and there is no abnormal open circuit；
S120：When the sliding pin of potentiometer is located at a certain position on resistive element, two fixed pins are measured respectively
With the voltage between sliding pin；
S130：The sum of two voltage measured by S120 is compared with supply voltage, judges that the sliding of potentiometer is drawn
Foot is abnormal with the presence or absence of open circuit.
Preferably, S140 judges the sliding pin of potentiometer abnormal the specific method is as follows with the presence or absence of open circuit：By two
The fixed pin input high level signal of one of fixed pin, another fixes pin input low level signal, measures defeated
Enter the voltage U1 between the fixation pin of low level signal and sliding pin；The fixation pin of original input high level signal is defeated
Enter low level signal, originally the fixation pin input high level signal of input low level signal, measures input low level signal
Voltage U2 between fixed pin and sliding pin；Judge whether the sum of voltage U1 and voltage U2 are equal with supply voltage, if phase
Deng then sliding pin and there is abnormal open circuit.
Potentiometer provided by the invention open circuit automatic testing method extremely, it is different by the way that potentiometer is arranged in stepping electrical appliance
Normally opened road detecting system, electrical appliance at work, whether there is abnormal by the fixation pin and sliding pin that judge potentiometer
Short circuit monitors the exception of potentiometer in electrical appliance in real time.
The embodiment of the present invention also provides a kind of potentiometer open circuit automatic checkout system, including control system extremely, detection system
System, judges system；
The signal that control system is used to control the sliding pin of input potentiometer is high level signal, low level signal and height
Resistance state signal；
Detecting system is for detecting the voltage when pin of potentiometer is in different conditions；
Judgement system is used to judge that the pin of potentiometer is opened a way with the presence or absence of abnormal according to the voltage that detecting system detects.
Preferably, the control system is microcontroller.
Embodiment
Supply voltage is 5V in the present embodiment.
As shown in Figure 2：Whether normally first judge potentiometer sliding pin 1 and 3.It first sets IO_VR1 to export high electricity
Flat, IO_VR2 is set as input high resistant, and the voltage value of the ends IO_VR acquisition is 5V, equal with supply voltage, then is sliding pin 1 just
Often connection；Equally, IO_VR1 is set to input high resistant, IO_VR2 is set as output high level, and the ends IO_VR acquire to obtain voltage value
For 5V, then it is normal to slide pin 3；
If potentiometer resistance is R, resistance value R2 between resistance value R1, IO_VR to IO_VR2 between IO_VR1 to IO_VR,
And R=R1+R2；
Under original state, IO_VR1 exports high level signal, and IO_VR2 exports low level signal, passes through IO_VR mouthfuls at this time
Acquire out the voltage U1, U1=5* (R1/R) of potentiometer sliding end；IO_VR1 is exported into low level signal again, IO_VR2 outputs are high
Level signal goes out in IO_VR and acquires to obtain voltage U2, U2=5* (R2/R) again, in conjunction with the value measured above, U1+U2=5*
((R1+R2)/R)=5V；
It is obtained by theoretical calculation above, potentiometer is under normal circumstances, the voltage value adopted twice and electric for MCU power supplys
Pressure.
If potentiometer sliding end is opened a way, the voltage of the ends IO_VR acquisition is not influenced by IO_VR1 and IO_VR2 switchings, most
It may determine that whether potentiometer sliding end opens a way eventually.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that：Its according to
So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into
Row equivalent replacement；And these modifications or replacements, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (5)
1. a kind of potentiometer open circuit automatic testing method extremely, which is characterized in that include the following steps：
S110：Judge that the fixed pin of two, potentiometer is abnormal with the presence or absence of open circuit, if any fixation in two fixed pins is drawn
Foot has open circuit abnormal, then stops detecting；
S120：When the sliding pin of potentiometer is located at a certain position on resistive element, two fixed pins and cunning are measured respectively
Voltage between dynamic pin；
S130：The sum of two voltage measured by S120 is compared with supply voltage, judges that the sliding pin of potentiometer is
It is no to there is open circuit exception.
2. potentiometer according to claim 1 open circuit automatic testing method extremely, it is characterised in that：Current potential is judged in S110
The specific method is as follows with the presence or absence of open circuit exception for the fixed pin of device two：One of two fixed pins are fixed into pin
Input high level signal, another is fixed pin and is in high-impedance state, and the voltage of sliding pin is measured, and judges the voltage for sliding pin
Whether high level voltage is equal to, if equal, the fixation pin of input high level signal does not have abnormal open circuit.
3. potentiometer according to claim 1 open circuit automatic testing method extremely, it is characterised in that：S130 judges potentiometer
Sliding pin with the presence or absence of open circuit, abnormal the specific method is as follows：By the fixed pin input of one of two fixed pins
High level signal, another fixes pin input low level signal, and the fixation pin for measuring input low level signal draws with sliding
Voltage U1 between foot；By the fixation pin input low level signal of original input high level signal, originally input low level is believed
Number fixation pin input high level signal, measure input low level signal fixation pin and sliding pin between voltage
U2；Judge whether the sum of voltage U1 and voltage U2 are equal with supply voltage, if equal, slide pin and do not opened in the presence of abnormal
Road.
4. a kind of potentiometer open circuit automatic checkout system extremely, it is characterised in that：Including control system, detecting system, judge be
System；
The signal that control system is used to control the sliding pin of input potentiometer is high level signal, low level signal and high-impedance state
Signal；
Detecting system is for detecting the voltage when pin of potentiometer is in different conditions；
Judgement system is used to judge that the pin of potentiometer is opened a way with the presence or absence of abnormal according to the voltage that detecting system detects.
5. potentiometer according to claim 1 open circuit automatic checkout system extremely, it is characterised in that：The control system is
Microcontroller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810099105.5A CN108414871A (en) | 2018-01-31 | 2018-01-31 | A kind of abnormal automatic testing method and the system of opening a way of potentiometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810099105.5A CN108414871A (en) | 2018-01-31 | 2018-01-31 | A kind of abnormal automatic testing method and the system of opening a way of potentiometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108414871A true CN108414871A (en) | 2018-08-17 |
Family
ID=63127464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810099105.5A Pending CN108414871A (en) | 2018-01-31 | 2018-01-31 | A kind of abnormal automatic testing method and the system of opening a way of potentiometer |
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| CN (1) | CN108414871A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111043952A (en) * | 2019-12-20 | 2020-04-21 | 深圳天邦达科技有限公司 | Automatic detection method for perpendicularity of PCB interface pin header |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080094080A1 (en) * | 2005-05-18 | 2008-04-24 | E.G.O. Elektro-Geraetebau Gmbh | Method for evaluating a potentiometer and circuit arrangement having a potentiometer |
| CN104615124A (en) * | 2014-12-26 | 2015-05-13 | 中联重科股份有限公司 | Potentiometer calibration device, potentiometer calibration control method, device and system |
-
2018
- 2018-01-31 CN CN201810099105.5A patent/CN108414871A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080094080A1 (en) * | 2005-05-18 | 2008-04-24 | E.G.O. Elektro-Geraetebau Gmbh | Method for evaluating a potentiometer and circuit arrangement having a potentiometer |
| CN104615124A (en) * | 2014-12-26 | 2015-05-13 | 中联重科股份有限公司 | Potentiometer calibration device, potentiometer calibration control method, device and system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111043952A (en) * | 2019-12-20 | 2020-04-21 | 深圳天邦达科技有限公司 | Automatic detection method for perpendicularity of PCB interface pin header |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180817 |