CN111044785A - Method and process for detecting resistor in electronic component - Google Patents
Method and process for detecting resistor in electronic component Download PDFInfo
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- CN111044785A CN111044785A CN201811195861.4A CN201811195861A CN111044785A CN 111044785 A CN111044785 A CN 111044785A CN 201811195861 A CN201811195861 A CN 201811195861A CN 111044785 A CN111044785 A CN 111044785A
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- resistor
- resistance value
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- photoresistor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a method and a process for detecting a resistor in an electronic component, which comprise the detection of a cement resistor, a fixed resistor, a fusing resistor, a potentiometer, a positive temperature coefficient thermistor (PTC), a negative temperature coefficient thermistor (NTC), a piezoresistor and a piezoresistor. The detection method and the detection process provided by the invention can completely detect the potential damage of the electronic components, have high detection precision and meet the detection standards of daily electronic components and microelectronic components.
Description
Technical Field
The invention relates to a method and a process for detecting a resistor in an electronic component.
Background
The detection of the electronic component is one of the methods for judging whether the electronic component is damaged, the resistance is one of the basic electrical parameters, and how to accurately and effectively detect whether the electrical parameter is normal is not a rule and needs to be judged by different methods according to different equipment. Common resistance measurement methods in the market are: voltmeter-ampere method, resonance method, ohmmeter method, direct-current bridge method, digital ohmmeter method, and the like. The measurement of the methods is only performed on the fixed resistor and the cement resistor, the general precision is not high, the general use requirements can be met, and the potential damage of the electronic components cannot be detected.
Disclosure of Invention
In order to overcome the above disadvantages, the present invention provides a method and a process for detecting a resistor in an electronic component, which solves the existing problems. The purpose is realized by the following technical scheme.
A method and a process for detecting a resistor in an electronic component comprise the following steps:
a) firstly, detecting the cement resistor row, wherein the detection method comprises the following steps: two meter pens (without dividing into positive and negative) are respectively connected with pins at two ends of the resistor, so that the actual resistance value can be measured, and in order to improve the measurement accuracy, the measuring range is selected according to the nominal value of the measured resistor;
b) secondly, detecting the fixed resistor, wherein the detection method and the cautionary items are consistent with those of the cement resistor;
c) then, the fuse resistor is detected by the following method: the method is characterized in that a multimeter R multiplied by 1 gear is used for measurement, one end of a fuse resistor is welded from a circuit to ensure accurate measurement, and if the surface of the fuse resistor is blackened or burnt, the fuse resistor can be judged to be overloaded; if the surface is open without any trace, it indicates that the current flowing through is just equal to or slightly greater than its rated fusing value.
d) The potentiometer is detected by the following method: firstly, a rotating handle is rotated to see whether the rotation of the rotating handle is smooth or not and whether a switch is flexible or not; secondly, selecting a proper universal meter, and measuring two ends of 1 and 2 by using an ohmic block of the universal meter, wherein the reading value is the nominal resistance value of the potentiometer; and finally, detecting whether the movable arm of the potentiometer is in good contact with the resistor disc or not.
e) The positive temperature coefficient thermistor (PTC) is detected by the following method: and (3) carrying out normal temperature detection by using a universal meter R multiplied by 1 gear when the room temperature is close to 25 ℃, measuring the actual resistance value of the PTC thermistor by contacting two meter pens with two pins of the PTC thermistor, and comparing the actual resistance value with the nominal resistance value, wherein the difference between the actual resistance value and the nominal resistance value is within +/-2 omega. If the difference between the actual resistance value and the nominal resistance value is too large, the performance is poor or the actual resistance value is damaged; a heat source (such as an electric soldering iron) is close to the PTC thermistor to heat the PTC thermistor, and meanwhile, a universal meter is used for monitoring whether the resistance value of the PTC thermistor increases along with the increase of the temperature, if so, the fact that the thermistor is normal is indicated, and if the resistance value does not change, the fact that the performance of the PTC thermistor is poor is indicated, and the PTC thermistor cannot be used continuously.
f) The detection method for the negative temperature coefficient thermistor (NTC) comprises the following steps: and measuring the nominal resistance value Rt by using a universal meter, namely selecting a proper resistance block according to the nominal resistance value of the NTC thermistor to directly measure the actual value of the Rt. The measurement should be performed at room temperature and then at elevated temperature.
g) The detection method for the piezoresistor comprises the following steps: and (3) measuring the positive and reverse insulation resistances between the two pins of the piezoresistor by using the R multiplied by 1k gear of the multimeter, wherein the positive and reverse insulation resistances are infinite, otherwise, the leakage current is large. If the measured resistance is very small, the piezoresistor is damaged and cannot be used.
h) The detection method for the photoresistor comprises the following steps: A. a black paper sheet is used for covering the light-transmitting window of the photoresistor, and at the moment, the pointer of the multimeter is basically kept still, and the resistance value is close to infinity. A larger value indicates a better photoresistance performance. If the value is small or close to zero, it indicates that the photoresistor is burnt through and damaged, and can not be used any more. B. A light source is aligned to the light-transmitting window of the photoresistor, and the pointer of the multimeter swings to a larger extent at the moment, so that the resistance value is obviously reduced
Smaller values indicate better photoresistance performance. If the value is large or even infinite, the open circuit inside the photoresistor is damaged, and the photoresistor can not be used any more. C. The light-transmitting window of the photoresistor is aligned to incident light, a small piece of black paper is shaken on the upper part of the shading window of the photoresistor to make the light receive intermittently, and at the moment, the pointer of the multimeter swings left and right along with the shaking of the black paper. If the multimeter pointer is always stopped at a certain position and does not swing along with the shaking of the paper sheet, the situation that the photosensitive material of the photosensitive resistor is damaged is indicated.
Furthermore, during testing, particularly during testing of resistors with resistance values of more than dozens of k omega, hands do not need to touch the conductive parts of the gauge pen and the resistors; the detected resistor is welded from the circuit, and at least one head needs to be welded off so as to prevent other elements in the circuit from influencing the test and causing measurement errors; although the resistance of the color circle resistor can be determined by the color circle mark, the actual resistance is preferably tested by a multimeter during use.
Further, in the warm-up detection of the positive temperature coefficient thermistor (PTC), care is taken not to bring the heat source too close to or directly in contact with the PTC thermistor to prevent it from being scalded.
In conclusion, the beneficial effects of the invention are as follows: the detection method and the detection process provided by the invention can completely detect the potential damage of the electronic components, have high detection precision and meet the detection standards of daily electronic components and microelectronic components.
Detailed Description
A method and a process for detecting a resistor in an electronic component comprise the following steps:
a) firstly, detecting the cement resistor row, wherein the detection method comprises the following steps: two meter pens (without dividing into positive and negative) are respectively connected with pins at two ends of the resistor, so that the actual resistance value can be measured, and in order to improve the measurement accuracy, the measuring range is selected according to the nominal value of the measured resistor;
b) secondly, detecting the fixed resistor, wherein the detection method and the cautionary items are consistent with those of the cement resistor;
c) then, the fuse resistor is detected by the following method: the method is characterized in that a multimeter R multiplied by 1 gear is used for measurement, one end of a fuse resistor is welded from a circuit to ensure accurate measurement, and if the surface of the fuse resistor is blackened or burnt, the fuse resistor can be judged to be overloaded; if the surface is open without any trace, it indicates that the current flowing through is just equal to or slightly greater than its rated fusing value.
d) The potentiometer is detected by the following method: firstly, a rotating handle is rotated to see whether the rotation of the rotating handle is smooth or not and whether a switch is flexible or not; secondly, selecting a proper universal meter, and measuring two ends of 1 and 2 by using an ohmic block of the universal meter, wherein the reading value is the nominal resistance value of the potentiometer; and finally, detecting whether the movable arm of the potentiometer is in good contact with the resistor disc or not.
e) The positive temperature coefficient thermistor (PTC) is detected by the following method: and (3) carrying out normal temperature detection by using a universal meter R multiplied by 1 gear when the room temperature is close to 25 ℃, measuring the actual resistance value of the PTC thermistor by contacting two meter pens with two pins of the PTC thermistor, and comparing the actual resistance value with the nominal resistance value, wherein the difference between the actual resistance value and the nominal resistance value is within +/-2 omega. If the difference between the actual resistance value and the nominal resistance value is too large, the performance is poor or the actual resistance value is damaged; a heat source (such as an electric soldering iron) is close to the PTC thermistor to heat the PTC thermistor, and meanwhile, a universal meter is used for monitoring whether the resistance value of the PTC thermistor increases along with the increase of the temperature, if so, the fact that the thermistor is normal is indicated, and if the resistance value does not change, the fact that the performance of the PTC thermistor is poor is indicated, and the PTC thermistor cannot be used continuously.
f) The detection method for the negative temperature coefficient thermistor (NTC) comprises the following steps: and measuring the nominal resistance value Rt by using a universal meter, namely selecting a proper resistance block according to the nominal resistance value of the NTC thermistor to directly measure the actual value of the Rt. The measurement should be performed at room temperature and then at elevated temperature.
g) The detection method for the piezoresistor comprises the following steps: and (3) measuring the positive and reverse insulation resistances between the two pins of the piezoresistor by using the R multiplied by 1k gear of the multimeter, wherein the positive and reverse insulation resistances are infinite, otherwise, the leakage current is large. If the measured resistance is very small, the piezoresistor is damaged and cannot be used.
h) The detection method for the photoresistor comprises the following steps: A. a black paper sheet is used for covering the light-transmitting window of the photoresistor, and at the moment, the pointer of the multimeter is basically kept still, and the resistance value is close to infinity. A larger value indicates a better photoresistance performance. If the value is small or close to zero, it indicates that the photoresistor is burnt through and damaged, and can not be used any more. B. A light source is aligned to a light-transmitting window of the photosensitive resistor, at the moment, a pointer of the multimeter needs to swing to a larger extent, and the smaller the resistance value is obviously reduced by , the better the performance of the photosensitive resistor is. If the value is large or even infinite, the open circuit inside the photoresistor is damaged, and the photoresistor can not be used any more. C. The light-transmitting window of the photoresistor is aligned to incident light, a small piece of black paper is shaken on the upper part of the shading window of the photoresistor to make the light receive intermittently, and at the moment, the pointer of the multimeter swings left and right along with the shaking of the black paper. If the multimeter pointer is always stopped at a certain position and does not swing along with the shaking of the paper sheet, the situation that the photosensitive material of the photosensitive resistor is damaged is indicated.
Furthermore, during testing, particularly during testing of resistors with resistance values of more than dozens of k omega, hands do not need to touch the conductive parts of the gauge pen and the resistors; the detected resistor is welded from the circuit, and at least one head needs to be welded off so as to prevent other elements in the circuit from influencing the test and causing measurement errors; although the resistance of the color circle resistor can be determined by the color circle mark, the actual resistance is preferably tested by a multimeter during use.
Further, in the warm-up detection of the positive temperature coefficient thermistor (PTC), care is taken not to bring the heat source too close to or directly in contact with the PTC thermistor to prevent it from being scalded.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Claims (3)
1. A method and a process for detecting a resistor in an electronic component comprise the detection of a cement resistor, a fixed resistor, a fusing resistor, a potentiometer, a positive temperature coefficient thermistor (PTC), a negative temperature coefficient thermistor (NTC), a piezoresistor and a piezoresistor. The method is characterized by comprising the following steps:
a) firstly, detecting the cement resistor row, wherein the detection method comprises the following steps: two meter pens (without dividing into positive and negative) are respectively connected with pins at two ends of the resistor, so that the actual resistance value can be measured, and in order to improve the measurement accuracy, the measuring range is selected according to the nominal value of the measured resistor;
b) secondly, detecting the fixed resistor, wherein the detection method and the cautionary items are consistent with those of the cement resistor;
c) then, the fuse resistor is detected by the following method: the method is characterized in that a multimeter R multiplied by 1 gear is used for measurement, one end of a fuse resistor is welded from a circuit to ensure accurate measurement, and if the surface of the fuse resistor is blackened or burnt, the fuse resistor can be judged to be overloaded; if the surface is open without any trace, it indicates that the current flowing through is just equal to or slightly greater than its rated fusing value.
d) The potentiometer is detected by the following method: firstly, a rotating handle is rotated to see whether the rotation of the rotating handle is smooth or not and whether a switch is flexible or not; secondly, selecting a proper universal meter, and measuring two ends of 1 and 2 by using an ohmic block of the universal meter, wherein the reading value is the nominal resistance value of the potentiometer; and finally, detecting whether the movable arm of the potentiometer is in good contact with the resistor disc or not.
e) The positive temperature coefficient thermistor (PTC) is detected by the following method: and (3) carrying out normal temperature detection by using a universal meter R multiplied by 1 gear when the room temperature is close to 25 ℃, measuring the actual resistance value of the PTC thermistor by contacting two meter pens with two pins of the PTC thermistor, and comparing the actual resistance value with the nominal resistance value, wherein the difference between the actual resistance value and the nominal resistance value is within +/-2 omega. If the difference between the actual resistance value and the nominal resistance value is too large, the performance is poor or the actual resistance value is damaged; a heat source (such as an electric soldering iron) is close to the PTC thermistor to heat the PTC thermistor, and meanwhile, a universal meter is used for monitoring whether the resistance value of the PTC thermistor increases along with the increase of the temperature, if so, the fact that the thermistor is normal is indicated, and if the resistance value does not change, the fact that the performance of the PTC thermistor is poor is indicated, and the PTC thermistor cannot be used continuously.
f) The detection method for the negative temperature coefficient thermistor (NTC) comprises the following steps: and measuring the nominal resistance value Rt by using a universal meter, namely selecting a proper resistance block according to the nominal resistance value of the NTC thermistor to directly measure the actual value of the Rt. The measurement should be performed at room temperature and then at elevated temperature.
g) The detection method for the piezoresistor comprises the following steps: and (3) measuring the positive and reverse insulation resistances between the two pins of the piezoresistor by using the R multiplied by 1k gear of the multimeter, wherein the positive and reverse insulation resistances are infinite, otherwise, the leakage current is large. If the measured resistance is very small, the piezoresistor is damaged and cannot be used.
h) The detection method for the photoresistor comprises the following steps: A. a black paper sheet is used for covering the light-transmitting window of the photoresistor, and at the moment, the pointer of the multimeter is basically kept still, and the resistance value is close to infinity. A larger value indicates a better photoresistance performance. If the value is small or close to zero, it indicates that the photoresistor is burnt through and damaged, and can not be used any more. B. A light source is aligned to a light-transmitting window of the photosensitive resistor, at the moment, a pointer of the multimeter needs to swing to a larger extent, and the smaller the resistance value is obviously reduced by , the better the performance of the photosensitive resistor is. If the value is large or even infinite, the open circuit inside the photoresistor is damaged, and the photoresistor can not be used any more. C. The light-transmitting window of the photoresistor is aligned to incident light, a small piece of black paper is shaken on the upper part of the shading window of the photoresistor to make the light receive intermittently, and at the moment, the pointer of the multimeter swings left and right along with the shaking of the black paper. If the multimeter pointer is always stopped at a certain position and does not swing along with the shaking of the paper sheet, the situation that the photosensitive material of the photosensitive resistor is damaged is indicated.
2. The method and process for inspecting an electronic component according to claim 1, wherein: during testing, particularly when testing a resistor with a resistance value of more than dozens of k omega, hands do not touch the conductive parts of the gauge pen and the resistor; the detected resistor is welded from the circuit, and at least one head needs to be welded off so as to prevent other elements in the circuit from influencing the test and causing measurement errors; although the resistance of the color circle resistor can be determined by the color circle mark, the actual resistance is preferably tested by a multimeter during use.
3. The method and process for inspecting an electronic component according to claim 1, wherein: in the warm-up detection of a positive temperature coefficient thermistor (PTC), care is taken not to bring the heat source too close to or directly in contact with the PTC thermistor to prevent it from being scalded.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811195861.4A CN111044785A (en) | 2018-10-15 | 2018-10-15 | Method and process for detecting resistor in electronic component |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811195861.4A CN111044785A (en) | 2018-10-15 | 2018-10-15 | Method and process for detecting resistor in electronic component |
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| CN111044785A true CN111044785A (en) | 2020-04-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116754103A (en) * | 2023-08-22 | 2023-09-15 | 江苏兴顺电子有限公司 | Thermistor testing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116754103A (en) * | 2023-08-22 | 2023-09-15 | 江苏兴顺电子有限公司 | Thermistor testing device |
| CN116754103B (en) * | 2023-08-22 | 2023-12-26 | 江苏兴顺电子有限公司 | Thermistor testing device |
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Application publication date: 20200421 |