CN202975070U - Probe of oscilloscope - Google Patents
Probe of oscilloscope Download PDFInfo
- Publication number
- CN202975070U CN202975070U CN 201220686105 CN201220686105U CN202975070U CN 202975070 U CN202975070 U CN 202975070U CN 201220686105 CN201220686105 CN 201220686105 CN 201220686105 U CN201220686105 U CN 201220686105U CN 202975070 U CN202975070 U CN 202975070U
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- China
- Prior art keywords
- probe
- circuit
- output terminal
- operational amplifier
- oscilloprobe
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Abstract
The utility model discloses a probe of an oscilloscope. The probe comprises a probe body, a voltage division circuit, a differential circuit, a power circuit and an indicator lamp circuit. The probe body comprises a positive feeler pin and a negative feeler pin, both an output end of the positive feeler pin and an output end of the negative feeler pin are electrically connected with an input end of the voltage division circuit, an output end of the voltage division circuit is electrically connected with an input end of the oscilloscope by the differential circuit, the differential circuit is powered by the power circuit, and the indicator lamp circuit is provided with a probe working indicator lamp and a probe output overvoltage alarm indicator lamp. The probe of the oscilloscope has the advantages that normal operation of the probe is indicated via the indicator lamp circuit, alarm indication is outputted for the differential circuit when the rated maximum voltage of the oscilloscope is exceeded, and accordingly the probe is prevented from being damaged.
Description
Technical field
The utility model relates to the oscillograph technical field, is specifically related to a kind of oscilloprobe.
Background technology
Oscillograph is a kind of electronic measuring instrument, it can be transformed into image with electric signal such as electric current, voltage signal, show intuitively the electric signal feature that detects, oscilloprobe is the electronic unit that connects circuit-under-test and oscillograph input end, and its accuracy to measurement result is most important.
Be used for that measured signal is transferred to the probe that oscillograph shows and comprise active probe and passive probe, wherein, active probe comprises probe and bleeder circuit, difference channel and the power circuit that is comprised of anodal probe and negative pole probe, the output terminal of anodal probe and negative pole probe all is electrically connected at the input end of bleeder circuit, the output terminal of this bleeder circuit is electrically connected at an oscillographic input end by difference channel, and power circuit is the difference channel power supply.The D. C. value of bleeder circuit output voltage and the summation of peak values of ac can not surpass oscillographic rated voltage maximal value, if surpass this specified maximum voltage, can damage probe, not provide and have in prior art the enlightenment of reporting to the police when openly surpassing this specified maximum voltage.
The utility model content
For the deficiencies in the prior art, the purpose of this utility model is intended to provide a kind of oscilloprobe, it is indicated probe normal operation by indicator light circuit, and output surpasses the indication of reporting to the police of the specified maximum voltage of oscillograph to difference channel, pops one's head in to avoid damaging.
For achieving the above object, the utility model adopts following technical scheme:
Oscilloprobe, it comprises probe and bleeder circuit, difference channel and the power circuit that is comprised of anodal probe and negative pole probe, the output terminal of described anodal probe and negative pole probe all is electrically connected at the input end of bleeder circuit, the output terminal of this bleeder circuit is electrically connected at an oscillographic input end by difference channel, described power circuit is the difference channel power supply, and described oscilloprobe further comprises an indicator light circuit with probe relay indicating light and probe output overvoltage alarm lamp.
as improvement of the present utility model, described indicator light circuit comprises relay indicating light LED1, alarm lamp LED2, PNP triode Q1, operational amplifier U2a and operational amplifier U2b, the output terminal of power circuit is by a resistance R 18, ground connection after relay indicating light LED1, the emitter of PNP triode Q1 is connected between power circuit and resistance R 18, its collector is by a resistance R 19, ground connection after alarm lamp LED2, the inverting input of the output terminal of difference channel and operational amplifier U2a, the inverting input of operational amplifier U2b all is electrically connected, the output terminal of the output terminal of operational amplifier U2a and operational amplifier U2b all is connected to the base stage of PNP triode Q1 by a resistance R 2.
Preferably, described relay indicating light LED1 is green LED lamp, and described alarm lamp LED2 is red LED lamp.
The beneficial effects of the utility model are:
Than prior art, the utility model is set up indicator light circuit, when power circuit is the difference channel power supply, and this oscilloprobe normal operation, power circuit drives relay indicating light LED1 work, at this moment, alarm lamp LED2 does not work, and when the summation of the D. C. value of difference channel output voltage and peak values of ac surpasses oscillographic rated voltage maximal value, PNP triode Q1 conducting, alarm lamp LED2 work is carried out alarm, to avoid damaging oscilloprobe.
Description of drawings
The circuit theory diagrams of Fig. 1 the utility model oscilloprobe.
Embodiment
Below, by reference to the accompanying drawings and embodiment, the utility model is described further:
As shown in Figure 1, oscilloprobe, it comprises probe and bleeder circuit 2, difference channel 3 and the power circuit 5 that is comprised of anodal probe 11 and negative pole probe 12, the output terminal of anodal probe 11 and negative pole probe 12 all is electrically connected at the input end of bleeder circuit 2, the output terminal of this bleeder circuit 2 is electrically connected at the input end of an oscillograph 4 by difference channel 3, power circuit 5 is difference channel 3 power supplies, and oscilloprobe further comprises an indicator light circuit 6 with probe relay indicating light and probe output overvoltage alarm lamp.
as the utility model preferred embodiment, indicator light circuit 6 comprises relay indicating light LED1, alarm lamp LED2, PNP triode Q1, operational amplifier U2a and operational amplifier U2b, the output terminal of power circuit is by a resistance R 18, ground connection after relay indicating light LED1, the emitter of PNP triode Q1 is connected between power circuit and resistance R 18, its collector is by a resistance R 19, ground connection after alarm lamp LED2, the inverting input of the output terminal of difference channel and operational amplifier U2a, the inverting input of operational amplifier U2b all is electrically connected, the output terminal of the output terminal of operational amplifier U2a and operational amplifier U2b all is connected to the base stage of PNP triode Q1 by a resistance R 2.
principle of work is: when power circuit 5 is powered for difference channel 3, also directly be relay indicating light LED1 power supply, when being the oscilloprobe normal operation, this relay indicating light LED1 lights thereupon, relay indicating light LED1 can adopt green LED lamp, at this moment, the D. C. value of difference channel 3 output voltages and the summation of peak values of ac are during less than oscillographic rated voltage maximal value, PNP triode Q1 cut-off, alarm lamp LED2 does not work, and when the summation of the D. C. value of difference channel 3 output voltages and peak values of ac surpasses oscillographic rated voltage maximal value, PNP triode Q1 conducting, alarm lamp LED2 work, carry out alarm, specifically output voltage and reference voltage V+(or the V-) with difference channel 3 compares, in the utility model preferred embodiment, when the output voltage of difference channel 3 during greater than (R7*V-)/(R7+R6), the output terminal of operational amplifier U2a and the equal output low level of operational amplifier U2b, alarm lamp LED2 is lit.Certainly, in order to prevent having damaged oscilloprobe when reporting to the police, in the utility model preferred embodiment, by adjusting reference voltage V+(or V-), also can be by the indication of reporting to the police of the size of adjusting resistance R5 and resistance R 6, be namely to close on oscillographic specified maximum voltage when the summation of the D. C. value of difference channel 3 output voltages and peak values of ac namely to light alarm lamp LED2.In order to make alarm lamp LED2 more observably cause oscilloprobe user's attention, alarm lamp LED2 adopts red LED lamp, can certainly be other forms, for example glittering LED lamp, can also be re-established as alarm lamp LED2 alarm and carry out audible alarm.
For a person skilled in the art, can make other various corresponding changes and distortion according to technical scheme described above and design, and these all changes and the distortion all should belong to the protection domain of the utility model claim within.
Claims (3)
1. oscilloprobe, it comprises probe and bleeder circuit, difference channel and the power circuit that is comprised of anodal probe and negative pole probe, the output terminal of described anodal probe and negative pole probe all is electrically connected at the input end of bleeder circuit, the output terminal of this bleeder circuit is electrically connected at an oscillographic input end by difference channel, described power circuit is the difference channel power supply, it is characterized in that, described oscilloprobe further comprises an indicator light circuit with probe relay indicating light and probe output overvoltage alarm lamp.
2. oscilloprobe as claimed in claim 1, it is characterized in that, described indicator light circuit comprises relay indicating light LED1, alarm lamp LED2, PNP triode Q1, operational amplifier U2a and operational amplifier U2b, the output terminal of power circuit is by a resistance R 18, ground connection after relay indicating light LED1, the emitter of PNP triode Q1 is connected between power circuit and resistance R 18, its collector is by a resistance R 19, ground connection after alarm lamp LED2, the inverting input of the output terminal of difference channel and operational amplifier U2a, the inverting input of operational amplifier U2b all is electrically connected, the output terminal of the output terminal of operational amplifier U2a and operational amplifier U2b all is connected to the base stage of PNP triode Q1 by a resistance R 2.
3. oscilloprobe as claimed in claim 2, is characterized in that, described relay indicating light LED1 is green LED lamp, and described alarm lamp LED2 is red LED lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220686105 CN202975070U (en) | 2012-12-12 | 2012-12-12 | Probe of oscilloscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220686105 CN202975070U (en) | 2012-12-12 | 2012-12-12 | Probe of oscilloscope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202975070U true CN202975070U (en) | 2013-06-05 |
Family
ID=48516128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220686105 Expired - Fee Related CN202975070U (en) | 2012-12-12 | 2012-12-12 | Probe of oscilloscope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202975070U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103543310A (en) * | 2012-07-10 | 2014-01-29 | 北京普源精电科技有限公司 | Oscillograph with frequency response compensation circuit |
| CN104422798A (en) * | 2013-08-22 | 2015-03-18 | 特克特朗尼克公司 | Isolated probe with digital multimeter or digital voltmeter |
| CN107976565A (en) * | 2016-10-21 | 2018-05-01 | 新特***股份有限公司 | Probe card module |
-
2012
- 2012-12-12 CN CN 201220686105 patent/CN202975070U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103543310A (en) * | 2012-07-10 | 2014-01-29 | 北京普源精电科技有限公司 | Oscillograph with frequency response compensation circuit |
| CN104422798A (en) * | 2013-08-22 | 2015-03-18 | 特克特朗尼克公司 | Isolated probe with digital multimeter or digital voltmeter |
| CN104422798B (en) * | 2013-08-22 | 2018-11-09 | 特克特朗尼克公司 | Isolation probe with digital multimeter or digital voltmeter |
| CN107976565A (en) * | 2016-10-21 | 2018-05-01 | 新特***股份有限公司 | Probe card module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20201212 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |