CN201096864Y - Quality indicator for voltage sensitive resistor - Google Patents
Quality indicator for voltage sensitive resistor Download PDFInfo
- Publication number
- CN201096864Y CN201096864Y CN 200720032885 CN200720032885U CN201096864Y CN 201096864 Y CN201096864 Y CN 201096864Y CN 200720032885 CN200720032885 CN 200720032885 CN 200720032885 U CN200720032885 U CN 200720032885U CN 201096864 Y CN201096864 Y CN 201096864Y
- Authority
- CN
- China
- Prior art keywords
- piezoresister
- copper sheet
- pointer
- deterioration
- indicator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Thermistors And Varistors (AREA)
Abstract
The utility model provides a degradation indicator for the piezoresistor. An indicating finger is connected and fixed through a copper sheet on the cavity of the degradation indicator, a temperature sensing point at the connecting position of the copper sheet and the indicating finger is contacted with an aluminum electrode, a degradation indicating spring is arranged between the copper sheet and the indicating finger, and the cavity material of the degradation indicator is same as the aluminum electrode of the piezoresistor. When the performance of the piezoresistor is degraded, the indicating finger of the degradation indicator is ejected out, and people can observe the performance degradation of the piezoresistor with naked eyes, thereby taking measures.
Description
One, technical field
The utility model relates to a kind of deterioration indicator of piezoresister.
Two, background technology
Piezoresister is a kind of resistor to voltage-sensitive.When the voltage that is applied to the resistor two ends was lower than its threshold voltage, resistor was in high-impedance state, not conducting electric current; When the voltage that is applied to the resistor two ends was higher than its threshold voltage, resistor was in low resistive state, conducting (ON time is 50ns) rapidly.Piezoresister is connected in parallel in the line, just the surge current in the line system can be absorbed (elimination) and fall when the resistor conducting.Piezoresister can be installed in the electronic circuit, as televisor, phone, refrigerator, air conditioner, instrument etc.; Also be installed in the power circuit, as lightning arrester; In the power electronics circuit, be used for protecting semiconductor element in a large number.Problem is that piezoresister is the poly semiconductor element, after the impact that constantly is subjected to surge current, the vulnerable area of the grain boundary layer in the voltage dependent resistor (VDR) sustains damage, under the repeated stock effect of big electric current, the technical parameter grade of piezoresister reduces, and finally damages and can not use.Piezoresister damages from being not see what presentation is arranged in appearance generally speaking; the general method that adopts of large-scale visual plant be regularly with instrument detect judge resistor normally whether, it is cumbersome that the power electronic equipment that can not shut down some normal operations detects.
Three, Fa Ming purpose
The purpose of this utility model is to provide a kind of deterioration indicator of piezoresister, the deterioration indicator is exactly when the piezoresister performance becomes bad, indicator has pointer to eject, and becomes bad taking measures thereby people just can with the naked eye observe the performance of piezoresister.
The purpose of this utility model is to realize like this: the deterioration indicator of piezoresister, it comprises: the aluminium electrode, insulation shell, spring, the resistance chip, copper sheet, cavity, deterioration indication spring, the temperature-sensitive point, pointer, window constitutes, one side of the aluminium electrode of piezoresister is equipped with the deterioration indicator, there is a copper sheet that pointer is connected and fixed on the cavity of deterioration indicator, copper sheet and pointer junction thoughts warm spot and aluminium electrode contact, be provided with deterioration indication spring between pointer and the copper sheet, the aluminium electrode of the cavity material of deterioration indicator and piezoresister is identical.
The grain boundary layer of voltage dependent resistor (VDR) inside (resistive formation) is subjected to the repeatedly impact of surge current in the system, the vulnerable area of its grain boundary layer is owing to be subjected to the influence of Joule heat, resistivity reduces, the result of repeat function, make the leakage current of piezoresister increase, the temperature of resistive element constantly raises, and piezoresister has just lost its original function.After piezoresister was subjected to the impact of surge current in the system, the temperature of resistive element can raise, and generally speaking, when the temperature of resistive element during at 85 ℃, belonged to normal range.When the resistive element temperature continued to rise only more than 100 ℃, piezoresister just damaged, can not continue to use.During temperature 〉=100 that the deterioration indicator is set ℃, red pointer ejects in cavity, demonstrates piezoresister deterioration, needs to change.The deterioration of varistor device is damaged not to be needed to measure, and people's naked eyes just can be observed, and so just makes that work system is unlikely to cause big loss because of components and parts damage.
Four, accompanying drawing
Accompanying drawing 1 is the structural drawing of the deterioration indicator of the utility model piezoresister.
Wherein: 1----aluminium electrode 2----insulation shell 3----spring 4----resistance chip 5----copper sheet 6----cavity 7----deterioration indication spring 8----temperature-sensitive point 9----pointer 10----window
Five, implementation
With reference to accompanying drawing, the deterioration indicator of the utility model piezoresister, a kind of deterioration indicator of piezoresister, it comprises: aluminium electrode (1), insulation shell (2), spring (3), resistance chip (4), copper sheet (5), cavity (6), deterioration indication spring (7), temperature-sensitive point (8), pointer (9), window (10) constitutes, one side of the aluminium electrode (1) of piezoresister is equipped with the deterioration indicator, there is a copper sheet (5) that pointer (9) is connected and fixed on the cavity of deterioration indicator (6), copper sheet (5) and pointer (9) junction thoughts warm spot (8) and aluminium electrode (1) contact, and are provided with deterioration indication spring (7) between pointer (9) and the copper sheet (5).The aluminium electrode (1) of the cavity of described deterioration indicator (6) material and piezoresister is identical.When the temperature of temperature-sensitive point impression surpassed the temperature of setting, pointer just came off from copper sheet bearing, and the strength by spring ejects pointer, from externally demonstration of window (10).Under the normal condition, the temperature of piezoresister work is between-20 ℃～+ 85 ℃, and when not having surge to invade, piezoresister only has leakage current (μ A level) to pass through, and does not almost have temperature to produce; When surge current passes through, the resistive element temperature will rise, and its temperature can be above 85 ℃ yet; When the resistor deterioration, inner grain boundary layer is destroyed, and potential barrier reduces, at this moment leakage current has surpassed a milliampere level, and piezoresister is not allow the above continuous current of mA level to pass through, and the temperature of resistive element (chip) will constantly accumulate rising, finally meets or exceeds 100 ℃; Chip and electrode (aluminium) close proximity is just given the aluminium electrode with temperature transfer, and after the temperature-sensitive point at pointer and the copper sheet place of being connected and fixed received temperature, the tinsel of pointer came off from the junction pointer is ejected.Pointer ejects about 4mm from the cavity window, and people observe red pointer with eyes, just can judge the performance degradation of piezoresister, needs to change.
Claims (2)
1, a kind of deterioration indicator of piezoresister, it comprises: aluminium electrode (1), insulation shell (2), spring (3), resistance chip (4), copper sheet (5), cavity (6), deterioration indication spring (7), temperature-sensitive point (8), pointer (9), window (10) constitutes, it is characterized in that: a side of the aluminium electrode (1) of piezoresister is equipped with the deterioration indicator, there is a copper sheet (5) that pointer (9) is connected and fixed on the cavity of deterioration indicator (6), copper sheet (5) and pointer (9) junction thoughts warm spot (8) and aluminium electrode (1) contact, and are provided with deterioration indication spring (7) between pointer (9) and the copper sheet (5).
2,, the deterioration indicator of piezoresister as claimed in claim 1, it is characterized in that: the aluminium electrode (1) of the cavity of deterioration indicator (6) material and piezoresister is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720032885 CN201096864Y (en) | 2007-09-30 | 2007-09-30 | Quality indicator for voltage sensitive resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720032885 CN201096864Y (en) | 2007-09-30 | 2007-09-30 | Quality indicator for voltage sensitive resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201096864Y true CN201096864Y (en) | 2008-08-06 |
Family
ID=39923917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200720032885 Expired - Fee Related CN201096864Y (en) | 2007-09-30 | 2007-09-30 | Quality indicator for voltage sensitive resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201096864Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106716102A (en) * | 2014-09-29 | 2017-05-24 | 洛德公司 | Elastomeric degradation indicator devices, systems, and methods |
-
2007
- 2007-09-30 CN CN 200720032885 patent/CN201096864Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106716102A (en) * | 2014-09-29 | 2017-05-24 | 洛德公司 | Elastomeric degradation indicator devices, systems, and methods |
| CN106716102B (en) * | 2014-09-29 | 2020-04-07 | 洛德公司 | Elastomeric degradation indicator apparatus, systems, and methods |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080806 Termination date: 20091030 |