CN201819982U - Power supply detection device - Google Patents
Power supply detection device Download PDFInfo
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- CN201819982U CN201819982U CN 201020187319 CN201020187319U CN201819982U CN 201819982 U CN201819982 U CN 201819982U CN 201020187319 CN201020187319 CN 201020187319 CN 201020187319 U CN201020187319 U CN 201020187319U CN 201819982 U CN201819982 U CN 201819982U
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Abstract
The utility model provides a power supply detection device which is used for detecting whether the voltage output of a single-board power supply in an advanced telecom computing architecture is normal or not. The power supply detection device comprises a processing module and an output module, wherein the processing module is used for receiving a plurality of power supply indicating signals, processes the power supply indicating signals and outputs processing result signals which indicate whether the voltage of the power supply is abnormal or not, and the output module is used for displaying the processing result signals from the processing module and outputs load power supply control signals according to the processing result signals to control whether a load power supply is turned off or not. By adopting the technical scheme, the defects existing in the prior art can be overcome and the power supply detection device has the advantages of low cost, high detection accuracy, high extensibility, high reliability and short fault response delay time.
Description
Technical field
The utility model relates to a kind of power detector, whether the voltage output that relates in particular to the intrasystem one-board power supply of a kind of detection ATCA (advanced telecommunications computing architecture, Advanced telecom computing architecture) normal power detector.
Background technology
Usually, general processor chips all need multiple power supply power supply, if the not power supply for a long time of certain power supply in these power supplys will cause processor to damage, if voltage fluctuation will cause the processor job insecurity more greatly.Therefore, the detection of electric power output voltage is very important for veneer.
At present, in the ATCA system, detect load voltage by following processing: by A/D (analog to digital conversion) the pin sample voltage value of single-chip microcomputer, utilize Single Chip Microcomputer (SCM) program relatively sampled value and preset threshold, if detect unusual, then export control signal load power source is turn-offed, detect principle as shown in Figure 1.
Managing electrical power powers on earlier in the ATCA system, and then the control load power supply electrifying.The power supply of single-chip microcomputer is provided by managing electrical power, when the single-chip microcomputer working procedure detects voltage all just often, lights light emitting diode, exports the control load power supply signal simultaneously, and when detecting electric voltage exception, extinguishes light emitting diode, simultaneously the switching off load power supply.
Yet the pick-up unit of prior art has following shortcoming:
The first, cost is than higher, and the cost here comprises the cost of single-chip microcomputer and the development and maintenance cost of software;
Second, the accuracy that prior art detects is low, this is because the power supply on the general veneer is dispersed in each position of veneer, therefore guiding to needs to walk very long line and will add current-limiting resistance on the single-chip microcomputer pin, so just make voltage that certain pressure drop is arranged, thereby there is certain error in the single-chip microcomputer detection;
The 3rd, the extensibility of prior art is relatively poor, and this is because the pin that the detection of prior art needs single-chip microcomputer to have the A/D function, and single-chip microcomputer to have the pin of this function be limited, thereby make expansion not too easily;
The 4th, the reliability of prior art is relatively poor, and this is because the detection of prior art realizes by running software, and unavoidable some defective of the realization of software;
The 5th, the failure response time delay of prior art is uncertain, and the worst situation may need the time of tens ms.
Summary of the invention
Consider the problems referred to above and make the utility model, for this reason, fundamental purpose of the present utility model is to provide a kind of power detector, whether the voltage output that is used to detect the one-board power supply in the Advanced telecom computing architecture is normal, comprise: processing module, be used to receive a plurality of power indication signal, and a plurality of power indication signal are handled with a plurality of power source voltage of output expression abnormity processing consequential signal whether; And output module, be used to show result signal from processing module, and according to result signal output control load power supply signal whether to control the switching off load power supply.
Preferably, processing module receives a plurality of power indication signal respectively from a plurality of power supplys.
Alternatively, power detector also comprises: a plurality of detection modules are used for detecting respectively the output voltage of a plurality of power supplys and export a plurality of power indication signal.
Each detection module all comprises: first comparer and second comparer, the in-phase input end input of the inverting input of first comparer and second comparer is from a power source voltage, the in-phase input end input of first comparer is greater than the threshold voltage voltage of preset range of this power supply, and the input of the inverting input of second comparer is less than the threshold voltage voltage of preset range of this power supply; Sheffer stroke gate, the input end of Sheffer stroke gate are connected to the output terminal of first comparer and the output terminal of second comparer respectively; And field effect transistor, the grid of field effect transistor is connected to the output terminal of Sheffer stroke gate, and source electrode is connected to ground voltage, and drain electrode out-put supply indicator signal.
Preferably, above-mentioned preset range is 10%.
Preferably, managing electrical power utilizes two divider resistances in the threshold voltage voltage of preset range of the in-phase input end of first comparer input greater than this power supply, and utilizes two divider resistances in the inverting input input of second comparer threshold voltage voltage of preset range less than this power supply.
Preferably, processing module comprises: pull-up resistor, and an end of pull-up resistor is connected to a plurality of power indication signal, and the other end of pull-up resistor is connected to managing electrical power.
Preferably, output module comprises: light emitting diode, and the negative pole of light emitting diode is connected to ground voltage; And resistance, second end of described resistance is connected to the positive pole of light emitting diode, and first termination of resistance is received the result signal from processing module, and exports the control load power supply signal from first end of voltage.
Preferably, a plurality of power indication signal are the open-drain signal.
By the technical solution of the utility model, can overcome the existing in prior technology shortcoming, realized the advantage that cost is low, detection accuracy is high, extensibility is high, reliability is high and the failure response time-delay is little.
Other features and advantages of the utility model will be set forth in the following description, and, partly from instructions, become apparent, perhaps understand by implementing the utility model.The purpose of this utility model and other advantages can realize and obtain by specifically noted structure in the instructions of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, and illustrative examples of the present utility model and explanation thereof are used to explain the utility model, do not constitute improper qualification of the present utility model.In the accompanying drawings:
Fig. 1 illustrates the theory diagram that existing single-chip microcomputer detects voltage in the veneer;
Fig. 2 is the block diagram that illustrates according to the power detector 20 of an embodiment of the utility model;
Fig. 3 is the block diagram that illustrates according to the power detector 30 of another embodiment of the utility model;
Fig. 4 is the block diagram that illustrates according to the detection module of the utility model embodiment; And
Fig. 5 illustrates according to the processing module of the utility model embodiment and the schematic block diagram of output module.
Embodiment
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing.
Fig. 2 is the block diagram that illustrates according to the power detector 20 of the utility model embodiment.
With reference to Fig. 2, power detector 20 comprises: processing module 202, be used for receiving whether normal a plurality of power indication signal of expression power supply, and described a plurality of power indication signal are handled with a plurality of power source voltage of output expression abnormity processing consequential signal whether; And output module 204, be used to show result signal from processing module, and according to result signal output control load power supply signal whether to control the switching off load power supply.
At present, most power module all has PowerGood signal (the normal indicator signal of power supply), and this PowerGood signal is the open-drain signal.When power supply just often the PowerGood signal be high, and when abnormity of power supply, the PowerGood signal is low.
Therefore, in this case, power module is directly exported to processing module with the normal indicator signal of power supply, for processing module these signals is handled, and result is exported to output module; Whether then, output module utilizes result to control needs the switching off load power supply.
Fig. 3 is the block diagram that illustrates according to the power detector 30 of another embodiment of the utility model.Different with the power detector 20 of Fig. 2 is, power detector 30 also comprises a detection module 300, and whether the major function of this detection module detects each power source voltage exactly normal.
As can be seen from the above description, processing module needs a plurality of power indication signal, yet do not have at power module under the situation of PowerGood pin, power detector 20 shown in Figure 2 just can't be worked, therefore need a detection module 300 obtain a plurality of power indication signal, can use the testing circuit of Fig. 4 to realize the voltage detecting function of detection module 300.Noticing that therefore a detection module 300 exists a plurality of detection modules 300 corresponding to a power supply in power detector 30, because the structure of each detection module 300 is all identical, below is that example is described with a detection module only.
With reference to Fig. 4, the circuit of detection module 300 is made up of 2 comparers, Sheffer stroke gate and a MosFET (field effect transistor).Its principle of work is as follows: Vbc be tested voltage (promptly, from power source voltage), MP is the managing electrical power of veneer, MP imports V+10% at the in-phase input end of last comparer respectively by divider resistance, and playing the inverting input input V-10% of comparer, wherein, V is the predefined threshold voltage at a power supply of system.When Vbc was between V+10% and V-10%, two comparers all exported 1 like this, and Sheffer stroke gate is output as low, thereby MosFET turn-offs, and PowerGood is high.If Vbc, then goes up comparer greater than V+10% and is output as 0, following comparer is output as 1, and Sheffer stroke gate is output as height, thus the MosFET conducting, and PowerGood is low; If Vbc, then goes up comparer less than V-10% and is output as 1, following comparer is output as 0, and Sheffer stroke gate is output as height, thus the MosFET conducting, and PowerGood is low.
Note, here show two comparers and imported V+10% and V-10% respectively, the domain of walker of voltage is 10% of threshold voltage V, but it should be appreciated by those skilled in the art, this scope is not limited to 10%, can situation (for example, precision etc.) according to actual needs select different scopes.
By such structure, can obtain the normal indicator signal of power supply that power detector 20 as shown in Figure 2 directly obtains from power supply equally.
Note, show the structure that detection module 30 comprises 2 comparers, a Sheffer stroke gate and a field effect transistor here, but the utility model is not limited thereto.Those skilled in the art can carry out various modifications on the basis of this structure, as long as can access the normal indicator signal of power supply.
Below processing module and output module are described.Fig. 5 illustrates according to the processing module of the utility model embodiment and the schematic block diagram of output module.
The major function of processing module is exactly to handling from the signal of detection module input, the PowerGood signal of detection module 20 or 30 inputs is the open-drain signal, and the open-drain signal have line and function, line and function be exactly they connect together just have each signal with function.Simultaneously, the open-drain signal demand uses R16 to draw on carrying out, on draw power supply use and management power supply.
When various voltages all just often, all PowerGood are high, with consequential signal also be height; And when a kind of electric voltage exception, its PowerGood is low, then all PowerGood signals with the result be low just, that is, consequential signal is low.
The function of output module is exactly according to the shutoff of result control load power supply whether result with processing module shows and.The principle of work of output module is: when consequential signal when being high, light emitting diode is lighted, and represents that various voltages are normal, and control PayLoad (load) power supply signal is failure to actuate; And when a kind of detection voltage was undesired, consequential signal was low just, and light emitting diode goes out, and control PayLoad (load) power supply signal will the control load power remove.
Note, show a kind of specific implementation of processing module and output module here, but the utility model is not limited thereto.Those skilled in the art can carry out various modifications on the basis of this structure, for example, can utilize various other logical devices to realize the function that processing module and output module will be realized.For example, output module can not adopt light emitting diode, but adopts other any suitable display modes to represent the result of processing module.
Common the technical solution of the utility model, compared with prior art, realized following advantage:
(1) cost is low;
(2) the accuracy height of Jian Ceing, this is can place nearby or detect in power supply chip inside because of testing circuit;
(3) extensibility height, if power module provides PowerGood, only needing PowerGood and processing module linked together get final product, and if PowerGood is not provided, then only need increase detection module shown in Figure 4;
(4) reliability height as long as one road voltage has problem, is about to the PayLoad power remove of whole plate;
(5) the failure response time delay is fixed and is less, is generally tens ns.
The above is a preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (9)
1. power detector, whether the voltage output that is used to detect the intrasystem one-board power supply of Advanced telecom computing architecture is normal, it is characterized in that described power detector comprises:
Processing module is used to receive a plurality of power indication signal, and described a plurality of power indication signal are handled with a plurality of power source voltage of output expression abnormity processing consequential signal whether; And
Output module is used to show the result signal from described processing module, and according to described result signal output control load power supply signal whether to control the switching off load power supply.
2. power detector according to claim 1 is characterized in that, described processing module receives described a plurality of power indication signal respectively from described a plurality of power supplys.
3. power detector according to claim 1 is characterized in that, described power detector also comprises:
A plurality of detection modules are used for detecting respectively the output voltage of described a plurality of power supplys and export described a plurality of power indication signal.
4. power detector according to claim 3 is characterized in that, each detection module all comprises:
First comparer and second comparer, the in-phase input end input of the inverting input of described first comparer and described second comparer is from a power source voltage, the in-phase input end input of described first comparer is greater than the threshold voltage voltage of preset range of this power supply, and the input of the inverting input of described second comparer is less than the threshold voltage voltage of preset range of this power supply;
Sheffer stroke gate, the input end of described Sheffer stroke gate are connected to the output terminal of described first comparer and the output terminal of described second comparer respectively; And
Field effect transistor, the grid of described field effect transistor is connected to the output terminal of described Sheffer stroke gate, and source electrode is connected to ground voltage, and drain electrode out-put supply indicator signal.
5. power detector according to claim 4 is characterized in that, described preset range is 10%.
6. power detector according to claim 4, it is characterized in that, managing electrical power utilizes two divider resistances in the threshold voltage voltage of preset range of the in-phase input end of described first comparer input greater than this power supply, and utilizes two divider resistances in the inverting input input of described second comparer threshold voltage voltage of preset range less than this power supply.
7. power detector according to claim 1 is characterized in that, described processing module comprises:
Pull-up resistor, an end of described pull-up resistor is connected to described a plurality of power indication signal, and the other end of described pull-up resistor is connected to managing electrical power.
8. power detector according to claim 1 is characterized in that, described output module comprises:
Light emitting diode, the negative pole of described light emitting diode is connected to ground voltage; And
Resistance, second end of described resistance is connected to the positive pole of described light emitting diode, and first termination of described resistance is received the result signal from described processing module, and exports described control load power supply signal from first end of described voltage.
9. according to each described power detector of claim 1 to 8, it is characterized in that described a plurality of power indication signal are the open-drain signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020187319 CN201819982U (en) | 2010-05-05 | 2010-05-05 | Power supply detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020187319 CN201819982U (en) | 2010-05-05 | 2010-05-05 | Power supply detection device |
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| CN201819982U true CN201819982U (en) | 2011-05-04 |
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| CN 201020187319 Expired - Lifetime CN201819982U (en) | 2010-05-05 | 2010-05-05 | Power supply detection device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323852A (en) * | 2011-08-22 | 2012-01-18 | 迈普通信技术股份有限公司 | Modular power supply and device for testing state and power of modular power supply and method |
| CN103853056A (en) * | 2012-11-29 | 2014-06-11 | 华为技术有限公司 | Power voltage identification apparatus and power source |
| CN106060747A (en) * | 2016-05-30 | 2016-10-26 | 歌尔股份有限公司 | Diaphragm assembly defective detection device, loudspeaker and electronic equipment |
| CN106324530A (en) * | 2016-08-25 | 2017-01-11 | 国网新疆电力公司信息通信公司 | Power supply detection method and device |
| CN107607883A (en) * | 2017-08-30 | 2018-01-19 | 陕西千山航空电子有限责任公司 | A kind of electric current source follower circuit |
| CN109188310A (en) * | 2018-11-07 | 2019-01-11 | 内蒙古电力(集团)有限责任公司乌海电业局 | The power module failure monitoring device and system and monitoring method of the electrical secondary system of switchgear |
| CN113064095A (en) * | 2021-03-02 | 2021-07-02 | 深圳宝新创科技股份有限公司 | Electronic equipment fault detection method and device and electronic equipment |
-
2010
- 2010-05-05 CN CN 201020187319 patent/CN201819982U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323852A (en) * | 2011-08-22 | 2012-01-18 | 迈普通信技术股份有限公司 | Modular power supply and device for testing state and power of modular power supply and method |
| CN102323852B (en) * | 2011-08-22 | 2014-03-26 | 迈普通信技术股份有限公司 | Modular power supply and device for testing state and power of modular power supply and method |
| CN103853056A (en) * | 2012-11-29 | 2014-06-11 | 华为技术有限公司 | Power voltage identification apparatus and power source |
| CN103853056B (en) * | 2012-11-29 | 2016-12-21 | 华为技术有限公司 | A kind of supply voltage identification device and power supply |
| CN106060747A (en) * | 2016-05-30 | 2016-10-26 | 歌尔股份有限公司 | Diaphragm assembly defective detection device, loudspeaker and electronic equipment |
| CN106324530A (en) * | 2016-08-25 | 2017-01-11 | 国网新疆电力公司信息通信公司 | Power supply detection method and device |
| CN107607883A (en) * | 2017-08-30 | 2018-01-19 | 陕西千山航空电子有限责任公司 | A kind of electric current source follower circuit |
| CN109188310A (en) * | 2018-11-07 | 2019-01-11 | 内蒙古电力(集团)有限责任公司乌海电业局 | The power module failure monitoring device and system and monitoring method of the electrical secondary system of switchgear |
| CN113064095A (en) * | 2021-03-02 | 2021-07-02 | 深圳宝新创科技股份有限公司 | Electronic equipment fault detection method and device and electronic equipment |
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Granted publication date: 20110504 |