CN109164399A - Power detecting system and test method - Google Patents
Power detecting system and test method Download PDFInfo
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- CN109164399A CN109164399A CN201811049144.0A CN201811049144A CN109164399A CN 109164399 A CN109164399 A CN 109164399A CN 201811049144 A CN201811049144 A CN 201811049144A CN 109164399 A CN109164399 A CN 109164399A
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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
- G01R31/40—Testing power supplies
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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
- G01R31/40—Testing power supplies
- G01R31/42—AC power supplies
Abstract
The present invention relates to a kind of power detecting systems, comprising: primary processor；Exchange powers on module, is connected between primary processor and power supply to be measured, for receiving the control signal of primary processor and providing predeterminated voltage for power supply to be measured；Sampling control module is connected between primary processor and power output end to be measured and is controlled by primary processor, for receiving the control signal of primary processor and in turn switching on each power supply to be measured；Load blocks connect with primary processor and are used to be connected to the output end of each power supply to be measured, for providing default load for each power supply to be measured.The test macro completes the test to multiple power supplys within a test period, promotes testing efficiency.The invention further relates to a kind of power supply test methods, including, predeterminated voltage is provided for each power supply to be measured；It in turn switches on the connection of the output end of primary processor and power supply to be measured and default load is provided, successively sample the output voltage of power supply to be measured；Predeterminated voltage or default load are adjusted, is repeated the above steps.
Description
Technical field
The present invention relates to power supply test fields, more particularly to a kind of DC power supply test macro and test method.
Background technique
In power supply manufacturing process, it usually needs test the performance of power supply, power source performance index parameter is source tune
Whole rate and load regulation, wherein it is fully loaded situation that source regulation, which connects load by power supply output, and output voltage is with input electricity
The fluctuation of buckling, load regulation are input when being voltage rating, output voltage with load variation fluctuation.Power supply test is
An important process in power supply production system, production efficiency and product quality to power supply have important influence.Currently,
Test to power supply is all to access test macro one by one after power supply product assembles to test, and one power supply of every test requires
A test macro is restarted, and when manufacturer needs to test large batch of power supply, the integrated testability time will
Increase, the testing efficiency of power supply is reduced, to influence whole production efficiency.
Summary of the invention
A kind of new power detecting system and survey are provided for the low problem of power detecting system testing efficiency based on this
Method for testing.
A kind of power detecting system, for carrying out power up test, M >=2, the power detecting system to M power supplys to be measured
Include:
Primary processor controls signal for output multi-channel and successively samples to the output voltage of each power supply to be measured；
Exchange powers on module, and one end is connect with the primary processor, and the other end is used to connect with the input terminal of each power supply to be measured
It connects, for receiving the first control signal of the primary processor and providing predeterminated voltage for each power supply to be measured；
Sampling control module, including the first control terminal, the first output end and M first input end, each first input end
For connecting with the output end of a power supply to be measured, first output end is connect with the primary processor, first control
End is connect with the primary processor, for receiving the second control signal of the primary processor and in turn switching on each first input end
With first output end；With
Load blocks connect with the primary processor and are used to be connected to the output end of each power supply to be measured, for connecing
It receives the third control signal of the primary processor and provides default load for each power supply to be measured.
Above-mentioned power detecting system when starting a test macro, can test multiple power supplys, be controlled by sampling
Molding block can be such that primary processor successively connect in a certain order with the output end of multiple power supplys successively to sample power supply
Output voltage.Meanwhile test macro further includes that exchange powers on module and load blocks, exchange powers on module can be to power input
Predeterminated voltage, load blocks can be the default load of plant-grid connection, and exchange powers on module and load blocks and is adjusted, and passes through
It adjusts exchange and powers on module, thus it is possible to vary predeterminated voltage changes the input voltage of power supply, successively sample the output electricity of each power supply
Pressure, can calculate the source regulation of each power supply, by adjusting load blocks, thus it is possible to vary power supply connects load, successively samples
The output voltage of each power supply can calculate the load regulation of each power supply, to complete within the one-shot period of system
Test to multiple power supplys.Compared to the method that test macro of starting can only test a power supply, test macro starting one
It is secondary to test multiple power supplys, the testing time is greatly saved, promotes testing efficiency.And when M power supply need to be tested, it is using this
System is tested, and can sample the corresponding output voltage of all power supplys due to changing a predeterminated voltage and default load, i.e., once
It is unrelated with the quantity of the power supply accessed to start change predeterminated voltage and the number of default load in the period, if change frequency is N,
And when can only test a power supply in the test macro one-shot period, the change frequency of predeterminated voltage and default load is then M*
The change frequency of N, correlation module are more, and the change frequency of module is higher, and the operating temperature of module is higher, and the performance of module is got over
Difference, to influence final measuring accuracy.
It includes from processor, Programmable AC Power Source and exchanging that the exchange, which powers on module, in one of the embodiments,
Upper electric control module, the first control signal include first voltage adjustment signal and first switch signal, described from processor
It is communicated to connect respectively with the primary processor and the Programmable AC Power Source, for receiving the first voltage of the primary processor
Adjustment signal simultaneously controls the Programmable AC Power Source generation predeterminated voltage, and electric control module includes the second input in the exchange
End, the second control terminal and second output terminal, second input terminal are connect with the Programmable AC Power Source output end, and described the
Two output ends with the input terminal of each power supply to be measured for connecting, and second control terminal is connect with the primary processor, for connecing
It receives the first switch signal of the primary processor and controls the on-off of electric control module in the exchange.
The sampling control module includes: in one of the embodiments,
The input terminal of decoder, the decoder connects as the control terminal of the sampling control module and the primary processor
Connect, for receiving the second control signal of the primary processor, the decoder includes M output end, the decoder it is each
Output end is respectively used to one corresponding level signal of output；
M first switch unit, one as the sampling control module of the input terminal of each first switch unit
First input end, for being connect with the output end of a power supply to be measured, the connected conduct of the output end of each first switch unit
First output end of the sampling control module is connect with the primary processor, the control terminal difference of each first switch unit
It is connect with an output end of the decoder, for according to the level signal of decoder output control each described first
The on-off of switch unit.
The first switch unit includes: in one of the embodiments,
First switch tube, the control terminal of the first switch tube is connect with an output end of the decoder, for connecing
The level signal of the decoder output is received to control the on-off of the first switch tube；
First relay, input terminal of the input terminal of first relay as the first switch unit, for
The output end connection of one power supply to be measured, the output end of first relay as the first switch unit output end with
The primary processor connection, the control terminal of first relay is connect with the first switch tube, for according to described first
The on-off of switching tube controls the on-off of first relay.
The load blocks include ruling voltage generation module and current regulating module, institute in one of the embodiments,
It states ruling voltage generation module to connect with the primary processor, the third for receiving the primary processor controls signal and exports
Suitable ruling voltage, the current regulating module include the first amplifier, sampling resistor and second switch, first amplifier
Normal phase input end connect with the ruling voltage generation module, for obtaining the ruling voltage, the one of the sampling resistor
End is connected to the first output end of the sampling control module, and the anti-phase input with first amplifier by second switch
End connection, the other end ground connection of the sampling resistor, the output end of the control terminal of the second switch and first amplifier
Connection.
The ruling voltage generation module includes the second amplifier, zener diode, adjustable electric in one of the embodiments,
Resistance module and the first to the 5th resistance, the normal phase input end of second amplifier are connected to the controlling of sampling by first resistor
The inverting input terminal of first output end of module, second amplifier is grounded by 3rd resistor, and is connected by second resistance
To the output end of second amplifier, the backward end of the zener diode is respectively connected to the positive input of second amplifier
End is connected to the output end of second amplifier by the 4th resistance and is connected to adjustable resistance module by the 5th resistance
One end, the other end ground connection of the adjustable resistance module, the control terminal of the adjustable resistance module are connect with the primary processor
Signal is controlled to receive the third of the primary processor, the adjustable resistance module is used to control signal according to the third and generate
The connecting pin of suitable adjustable resistance, the 5th resistance and the adjustable resistance module is as the ruling voltage generation module
Output end export ruling voltage.
The power detecting system further includes ripple processing module in one of the embodiments, and the ripple handles mould
Block includes filter unit and subtrator, the first output end company of the input terminal of the filter unit and the sampling control module
It connects, for obtaining and filtering out the ripple of the electric power output voltage to be measured, an input terminal of the subtrator and the filtering
The output end of unit connects, and another input terminal is connect with the first output end of the sampling control module, and the subtrator is used
In obtaining the ripple in the electric power output voltage to be measured, the output end of the subtraction circuit is connect with the primary processor.
The power detecting system further includes host computer in one of the embodiments, the host computer and the main place
Device communication connection is managed, for issuing the sampled data that test instructs and obtains the primary processor to the primary processor.
A kind of power supply test method, for carrying out power up test, M >=2, the power supply test method to M power supplys to be measured
Include:
Step A: predeterminated voltage is provided for each power supply to be measured；
Step B: the connection of the output end of primary processor and the power supply to be measured and the power supply to be measured to connect are in turn switched on
Default load is provided, the output voltage of the power supply to be measured of the connection is successively sampled；
Step C: predeterminated voltage or default load are adjusted, step B is repeated.
Above-mentioned power supply test method can test multiple power supplys within the one-shot period of system, compared to
System starting is primary only to test a power supply, and the testing time substantially reduces, and testing efficiency is improved, and predeterminated voltage or pre-
If load variation is primary, the corresponding output voltage of all power supplys can be sampled, predeterminated voltage or default load in entire test process
Change frequency it is also opposite reduce, change frequency reduces, and the heat production in test process reduces, and the working condition of each operational module is more
Good, final resulting test result precision is also higher.
The power supply test method further includes ripple test method, the ripple test side in one of the embodiments,
Method includes:
It obtains the output voltage for connecting power supply to be measured and the ripple for filtering out the output voltage obtains DC component；
The output voltage is subtracted into the DC component and obtains the ripple of the output voltage.
Detailed description of the invention
Fig. 1 is power detecting system block diagram；
Fig. 2 is power detecting system block diagram in an embodiment；
Fig. 3 a is sampling control module block diagram in an embodiment；
Fig. 3 b is decoder schematic diagram in an embodiment；
Fig. 3 c is the connection schematic diagram of M first switch unit in an embodiment；
Fig. 4 a is load blocks circuit diagram in an embodiment；
Fig. 4 b is load blocks circuit diagram in another embodiment；
Fig. 5 a is filter unit circuit diagram in an embodiment；
Fig. 5 b is subtrator circuit diagram in an embodiment；
Fig. 6 is primary processor connection figure in an embodiment；
Fig. 7 is in an embodiment from processor connection figure；
Fig. 8 is power supply test method and step flow chart in an embodiment.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give preferred embodiment of the invention.But the invention can be realized in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is make it is more thorough and comprehensive to the disclosure.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
It should be noted that it can be directly to separately when an element is considered as " connection " another element
One element may be simultaneously present centering elements.
As shown in Figure 1, power detecting system is used to carry out M power supplys to be measured power up test, which includes master
Processor and the exchange connecting with primary processor power on module, sampling control module and load blocks.Wherein, primary processor is used
Module, sampling control module and load blocks powered on to exchange control in output multi-channel control signal, in turn switch on
The connection of each power output end to be measured, to successively be sampled to the output voltage of each power supply to be measured.Wherein, exchange powers on mould
Block one end is connect with primary processor, and the other end is connect with the input terminal of each power supply to be measured, i.e. exchange powers on module and is connected to main place
It manages between device and power supply to be measured, for receiving the first control signal of primary processor and providing predeterminated voltage for each power supply to be measured,
It can change predeterminated voltage according to the difference of first control signal, that is, change the input voltage of each power supply to be measured.Sampling control module
Including the first control terminal, the first output end and M first input end, each first input end is used for defeated with power supply to be measured
The output end of outlet connection, i.e. M first input end and M power supplys to be measured connects one to one, and the first of sampling control module
Output end is connect with primary processor, and the first control terminal of sampling control module is connect with primary processor, for receiving primary processor
Second control signal, can according to the difference of second control signal, select connect the first output end and one of them first input
The connection at end thereby turns on the connection of a wherein power output end and primary processor to be measured, first input end and the first output end
After connection, the output end of output voltage signal from power supply to be measured is defeated followed by the first input end of sampling control module and first
Outlet simultaneously inputs primary processor, completes sampling of the primary processor to the electric power output voltage to be measured connected.It needs to illustrate
It is that one sample port of primary processor once only receives a voltage signal, i.e. the first output end can only once be connected and one
The connection of first input end.By changing second control signal, all power supplys to be measured are in turn switched on, and be sequentially completed to being needed
Survey the sampling of electric power output voltage.Load blocks connect with primary processor and are connected to the output end of each power supply to be measured, for connecing
It receives the third control signal of primary processor and provides default load for each power supply to be measured, the difference of signal can be controlled according to third,
Adjust default load.In one embodiment, load blocks are specifically connect with the first output end of sampling control module, work as main process task
When device is connect by sampling control module with the output end of a certain power supply to be measured, the load blocks are also by the sampling control module
It connects the connection with the power output end to be measured and provides default load for the power supply to be measured of the connection.
Above-mentioned power detecting system, the output end that primary processor can successively with M power supplys to be measured by sampling control module
Connection, after powering on module setting predeterminated voltage by exchange and default load being arranged by load blocks, primary processor can be successively
The output voltage of each power supply to be measured is sampled, after changing predeterminated voltage or default load, continuation successively samples the defeated of each power supply to be measured
Thus voltage out calculates the source regulation and load regulation of each power supply to be measured, completes the test of power source performance.Above-mentioned power supply
Test macro starting can once test batch power supply, can carry out batch testing in the power supply jigsaw unsegregated stage,
A power supply can only be tested compared to primary system is started after assembling power supply, the integrated testability time substantially reduces, thus
Improve testing efficiency.And in the test macro, a predeterminated voltage or default load are adjusted, all power supplys can be adopted
Sample is required to readjust predeterminated voltage and default load, the default electricity of this test macro when compared to one power supply of every test
Pressure and the adjusting frequency of default load substantially reduce, and are conducive to the stabilization of system module working condition, so that test result precision
It is higher.
In one embodiment, as shown in Fig. 2, it includes from processor, programmable friendship that exchange, which powers on module (not marking in figure),
Galvanic electricity source with exchange electric control module, wherein form alternating current adjustment module from processor and Programmable AC Power Source, specifically
Different predeterminated voltages is generated by the alternating current adjustment module.Specifically, the first control signal of primary processor output can wrap
Include first voltage adjustment signal and first switch signal, from processor respectively with primary processor and Programmable AC Power Source communication link
It connects, receive the first voltage adjustment signal of primary processor from processor and controls the corresponding default electricity of Programmable AC Power Source generation
Pressure.Electric control module includes the second input terminal, second output terminal and the second control terminal in exchange, and the second input terminal is handed over programmable
The output end in galvanic electricity source connects, for receiving the predeterminated voltage of Programmable AC Power Source generation, second output terminal be used for respectively to
The input terminal connection for surveying power supply, for each power input predeterminated voltage, the second control terminal to be connect with primary processor, for receiving
The first switch signal of primary processor simultaneously controls the on-off for exchanging upper electric control module, that is, controls the second input terminal and the second output
Hold the on-off of connection.When the second input terminal is connected with the connection of second output terminal, the input terminal access of each power supply to be measured is default electric
Pressure；When the connection of the second input terminal and second output terminal disconnects, each power input to be measured does not have input voltage.When test starts
When, electric control module in the exchange need to be connected, when the test is finished, electric control module in the exchange need to be turned off.In the present embodiment
In, default load is set as full load condition, predeterminated voltage is changed by alternating current adjustment module, and sample power supply to be measured in difference
Corresponding output voltage under predeterminated voltage, the source regulation of available power supply to be measured.
In one embodiment, as shown in Figure 3a, sampling control module includes decoder and the M connecting with decoder first
Switch unit, each first switch unit include an input terminal DC, an output end and a control terminal.Wherein, it decodes
The input terminal of device is connect as the first control terminal DK1 of sampling control module with primary processor, for receiving the of primary processor
Two control signals, decoder include M output end, and decoder is raw in M output end according to the first control signal of primary processor
At M level signal, each output end exports a corresponding level signal.Each input terminal of M first switch unit is made
For an input terminal of sampling control module, for connecting with the output end of a power supply to be measured to obtain corresponding power supply to be measured
The output end of output voltage, i.e., the input terminal and M power supplys to be measured of M first switch unit connects one to one；M first is opened
The output end for closing unit is connected and the first output end DC_IN as sampling control module is connect with primary processor；Each first
The control terminal of switch unit is connect respectively with an output end of decoder to obtain the level signal of decoder output, is used in combination
In the on-off for controlling corresponding first switch unit according to the level signal.In one embodiment, when first switch unit controls
When end reception level is high level, first switch unit is connected, when it is low level that first switch unit control terminal, which receives level,
First switch unit connection disconnect, primary processor to decoder send second control signal, the second control signal can for two into
Code processed generates M level signal by the decoding of decoder, and the level signal of only one of them output end is high level,
The level signal of remaining output end is low level, and control terminal is connected to the first switch unit conducting of high level, with this first
Output voltage is conveyed to primary processor by the first switch unit by the power supply to be measured of switch unit connection, is achieved in main place
Sampling of the device to the electric power output voltage to be measured is managed, and control terminal is connected to low level first switch unit and disconnects,
Therefore primary processor once only samples the output voltage of a power supply to be measured.By changing second control signal, decoding can control
Other output ends of device export high level signal in turn, i.e., complete the sampling of other power supplys to be measured in turn.
In one embodiment, sampling control module includes M first switch unit, and each first switch unit includes being connected
The first switch tube connect and the first relay.Control terminal and decoder of the control terminal of first switch tube as first switch unit
Output end connection, input terminal of the input terminal of the first relay as first switch unit, for the output with power supply to be measured
End connection, the output end of the first relay are connect as the output end of first switch unit with primary processor, the first relay
Control terminal is connect with first switch tube, for controlling the on-off of the first relay according to the on-off of first switch tube.Implement one
In example, as shown in Figure 3c, the first relay is normal-open type relay, and NPN type triode, the first relay can be selected in first switch tube
One end of device coil can be connected to a power supply VCC2, the collector connection of the other end and NPN type triode, three pole of NPN type
Level signal of the base stage of pipe as the control terminal access decoder of first switch unit, the emitter of NPN type triode pass through
One contact of one resistance eutral grounding, relay is connect as the input terminal of first switch module with the output end of power supply to be measured, after
Another contact of electric appliance is connected to primary processor as the output end of first switch unit.
In one embodiment, M=16, i.e. test macro can once test 16 power supplys to be measured, and decoder selects 4 line -16
74LS154 decoder such as can be selected in line decoder.As shown in Figure 3b, the line decoder of 4 lines -16 includes 4 input terminals, respectively
A, tetra- ports B, C, D, four input terminals are connect as the first control terminal DK1 of sampling control module with primary processor, are used
In the second control signal for receiving primary processor, in the present embodiment, second control signal is tetrad code, 4 lines-
16 line decoders are also needed comprising 16 output ends, respectively port 0~15, the level signal of corresponding output be respectively JQC0~
JQC15.As shown in Figure 3c, sampling control module includes 16 first switch units, that is, includes 16 the first relays, respectively
J0~J15, also includes 16 triodes, and the base stage of respectively Q0~Q15, triode Q0~Q15 are respectively connected to level signal
Input terminal DC0~DC15 of JQC0~JQC15, first relay J0~J15 are connect with the output end of 16 power supplys to be measured respectively
To obtain the output voltage of power supply to be measured respectively, the output end of first relay J0~J15 is connected as sampling control module
First output end DC_IN is connect with primary processor.In the present embodiment, by changing second control signal, the of connection is controlled
One switch unit, thus the power supply to be measured that selection is sampled, such as when second control signal is binary code 0000, decoding
The port 0 of device exports high level, i.e. JQC0 is high level, triode Q0 conducting, the first relay J0 connection, sampling and input terminal
The output voltage of the power supply to be measured of DC0 connection, it is similarly, corresponding when binary code is 1111 when change second control signal
Decimal number is 15, then the output voltage for the power supply to be measured that sampling is connect with input terminal DC15, i.e., when binary code is corresponding
When decimal number is K, then the output voltage of the correspondence power supply to be measured of input terminal DCK connection can be sampled, is thus sequentially completed to 16
The sampling of a power supply to be measured.
In one embodiment, as shown in fig. 4 a, load blocks include ruling voltage generation module and current regulating module.It cuts out
Certainly voltage generation module is connect with primary processor, and the third for receiving primary processor controls signal and controls signal according to third
Generate suitable ruling voltage V0.Current regulating module includes the first amplifier UA, sampling resistor R9 and second switch, the first fortune
The normal phase input end for putting UA is connect with ruling voltage generation module, and for obtaining ruling voltage, one end of sampling resistor R9 passes through
Second switch is connected to the first output end DC_IN of sampling control module, and connect with the inverting input terminal of the first amplifier UA,
The other end of sampling resistor R9 is grounded, and the output end of the first amplifier UA and the control terminal of second switch connect.In an embodiment
In, second switch is NPN type triode, concretely single triode, can also be cascaded for multiple triodes.In this reality
It applies in example, selects triode Q16, triode Q17 to cascade to form second switch, wherein the collection of triode Q16, triode Q17
Electrode is connected to the first output end DC_IN of sampling control module, and the base stage of triode Q16 is connected to the output of the first amplifier UA
End, the emitter of triode Q16 are connected to the base stage of triode Q17, and the emitter of triode Q17 is connect with sampling resistor R9.
In the present embodiment, under stable case, the voltage V9 on sampling resistor R9 is equal with ruling voltage V0, when electric power outputting current is sent out
Raw fluctuation, if the electric current of the first output end DC_IN of sampling control module increases, then the electric current flowed through on sampling resistor R9 increases
Greatly, V9 increases, i.e., when the voltage of the first amplifier UA inverting input terminal is greater than ruling voltage V0, the second amplifier UA exports low level,
The decline of triode Q16 base voltage is controlled, triode Q17 base voltage is declined, reduces triode Q17 emitter current,
The electric current for flowing through sampling resistor R9 reduces；When the electric current reduction of the port sampling control module the first output end DC_IN, then flows through and adopt
Electric current on sample resistance R9 reduces, and V9 reduces, i.e., when the voltage of the first amplifier UA inverting input terminal is less than ruling voltage V0, second
Amplifier UA exports high level, and control triode Q16 base voltage increases, increases triode Q17 base voltage, make triode
Q17 emitter current increases, and the electric current for flowing through sampling resistor R9 increases, so that electric power outputting current to be measured be made to be maintained at one surely
Practical fixed state, the i.e. load blocks are a passive constant current electronic load, adjust ruling voltage, thus it is possible to vary sampling resistor R9
Voltage thus adjust the output electric current of power supply to be measured to change the electric current of sampling resistor R9, change the default of power supply to be measured
Load.In the present embodiment, the output electric current of power supply to be measured is adjusted by load blocks, to adjust the load shape of power supply to be measured
State, can control predeterminated voltage is voltage rating, i.e., the input voltage of power supply to be measured is voltage rating, adjusts load condition, and adopt
Output voltage under the different loads state of each power supply to be measured of sample, can calculate the load regulation of each electrical measurement power supply.
In one embodiment, as shown in fig. 4 a, ruling voltage generation module include the second amplifier UA, zener diode D1,
Adjustable resistance module and the first to the 5th resistance R1 to R5, the normal phase input end of the second amplifier UB are connected to by first resistor R1
First output end DC_IN of sampling control module, the inverting input terminal of the second amplifier UB is grounded by 3rd resistor R3, and is passed through
Second resistance R2 is connected to the output end of the second amplifier U2, and the backward end of zener diode D1 is respectively connected to the second amplifier UB's
It normal phase input end, the output end that the second amplifier UB is connected to by the 4th resistance R4 and is connected to by the 5th resistance R5 adjustable
One end of resistive module, the other end ground connection of adjustable resistance module, control of the control terminal of adjustable resistance module as load blocks
End DK2 processed is connect with primary processor, and the third for receiving primary processor controls signal, and adjustable resistance module is controlled according to third
Signal generates suitable adjustable resistance, and the connecting pin of the 5th resistance and adjustable resistance module is as the defeated of ruling voltage generation module
Outlet exports ruling voltage V0.In the present embodiment, the voltage of zener diode is constant, can by adjusting adjustable resistance module
To change the partial pressure of the 5th resistance and adjustable resistance module, to change ruling voltage V0.
In one embodiment, as shown in Figure 4 b, specifically the first amplifier and the second amplifier are integrated in double operational device U1,
Such as ST358 double operational device.Primary processor can change the resistance of adjustable resistance module by adjusting third control signal, one
In embodiment, adjustable resistance module includes multiple resistance and multiple second switch units, controls resistance by second switch unit
The case where accessing circuit.In one embodiment, adjustable resistance module includes the 6th to the 8th resistance R6 to R8, further includes controlling respectively
Two second switch units of the 7th resistance R7 and the 8th resistance R8 access circuit are made, second switch unit includes third switching tube
With the second relay, the second relay is double-contact relay, and double-contact relay includes that a normally opened contact and one are normally closed
Contact and a common, common and normally opened contact constitute normally opened Trigger Function, and common and normally-closed contact are constituted
Normally closed Trigger Function.In the present embodiment, as shown in Figure 4 b, third switching tube can be triode, concretely three pole of NPN type
Pipe, triode Q18 and relay JQ1 are used to control the access of the 8th resistance R8, triode Q19 and relay JQ2 control the 7th
The access of resistance R7.8th resistance R8 is connected between the normally-closed contact OUT11 of relay JQI and normally opened contact OUT12, and after
The normally-closed contact OUT11 and common IN1 of electric appliance are grounded after being shorted, and the 7th resistance R7 is connected to the normally closed touching of relay JQ2
Between point OUT21 and normally opened contact OUT22, and the normally opened contact OUT2 of the common of relay JQ2 and relay JQ1 connect
It connects, one end of the 6th resistance R6 is connect with the normally opened contact OUT22 of relay JQ2, company of the other end as adjustable resistance module
It connects end to connect with the 5th resistance R5, one end S12 of relay JQ1 coil and the first output end DC_IN of sampling control module connect
It connecing, the output voltage of power supply to be measured can be obtained by sampling control module, other end S11 is connect with the collector of triode Q18,
The emitter of triode Q18 is connect with primary processor by a resistance, is used for by a resistance eutral grounding, the base stage of triode Q18
Obtain the third control signal of primary processor and control the on-off of triode Q18, third control signal can for high level signal or
Low level signal, when input triode Q18 base stage is high level signal, then triode Q18 is connected, and relay JQ1 coil is logical
Electricity, normally-closed contact disconnect, and the connection of normally opened contact closure, i.e. common IN1 and normally-closed contact OUT11 disconnects, common
IN1 and normally opened contact OUT12 is closed, and the 8th resistance R8 is by relay JQ1 short circuit at this time, conversely, when input triode Q18 base stage
It is low level signal, then the 8th resistance R8 connects into circuit.One end S22 of relay JQ2 coil and sampling control module
First output end DC_IN connection, can obtain the output voltage of power supply to be measured, other end S21 and three poles by sampling control module
The collector of pipe Q19 connects, the emitter of triode Q19 by a resistance eutral grounding, the base stage of triode Q19 by a resistance with
Primary processor connection, the on-off for obtaining the third control signal of primary processor and control triode Q19 similarly work as input
Triode Q19 base stage is high level signal, then triode Q19 is connected, and relay JQ2 coil is powered, and normally-closed contact disconnects, often
Contact closure is opened, i.e. the connection of common IN2 and normally-closed contact OUT21 disconnect, common IN2 and normally opened contact OUT22
Closure, the 7th resistance R7 is by relay JQ2 short circuit at this time, conversely, when input triode Q19 base stage is low level signal, then
7th resistance R7 connects into circuit.Signal is controlled by changing third, that is, changes the level signal at third switch controlled end, i.e.,
The resistance of changeable adjustable resistance module then provides different loads to adjust ruling voltage for power supply to be measured.
In one embodiment, as shown in Fig. 2, power detecting system further includes ripple processing module, mould is handled by ripple
Block can obtain the content of ripple in electric power output voltage.In one embodiment, ripple processing module includes filter unit and subtraction
Unit, wherein the first output end DC_IN connection of the input terminal and sampling control module of filter unit, for obtaining electricity to be measured
The output voltage in source is simultaneously filtered the output voltage, is exported with filtering out after wherein ripple obtains DC component, subtrator
An input terminal and sampling control module the first output end DC_IN connection, the output of another input terminal and filter unit
End connection, obtains ripple component, the output of subtrator for the output voltage of power supply to be measured to be subtracted branch flow component therein
End is connect with primary processor, and primary processor can obtain the ripple.
In one embodiment, filter unit circuit connection diagram is as shown in Figure 5 a, can by shunt capacitance and series inductance
Realize filtering, and in output end DC_COM output DC component.In one embodiment, as shown in Figure 5 b, subtrator include by
The subtraction circuit that amplifier U2 is constituted, wherein it is defeated that the normal phase input end of amplifier U2 passes through resistance R53 and the first of sampling control module
Outlet DC_IN connection, and be grounded by resistance R54, the inverting input terminal of amplifier U2 passes through the output of resistance R52 and filter power supply
DC_COM connection is held, and is connect by resistance R51 with the output end of amplifier U2, the output end of amplifier U2 can pass through a filter capacitor
C5 is connect with primary processor.Amplifier U2 can carry out subtraction to two input voltages, obtain ripple component and input main process task
Device.In one embodiment, specific settable R54/R53=R51/R52, if the electric power output voltage of the end DC_IN input is Vdc,
The DC component of the end DC_COM input is Va, then the result of amplifier U2 output is Vb=R51 (Vdc-Va)/R52, which is connect
Enter primary processor, ripple content can be calculated.
In one embodiment, as shown in Fig. 2, power detecting system further includes host computer, host computer is communicated with primary processor
Connection, for sending the sampled data that test instructs and obtains primary processor to primary processor.In the present embodiment, especially by
Host computer issue test instruction, the running parameter of each module is such as set and controls test process, and primary processor sample it is defeated
Voltage and ripple are sent to host computer out, carry out the processing of data in host computer and will show test result.
In one embodiment, as shown in fig. 6, primary processor includes main control chip and the periphery electricity connecting with main control chip
Road.Wherein, peripheral circuit 1 is crystal oscillating circuit, for providing time pulse for main control chip.Peripheral circuit 2 is reset circuit, when
Switch S1 closure, when the RESET pin of main control chip accesses time pulse of the low level time greater than main control chip, master control core
Piece is resetted.Peripheral circuit 3 is start-up circuit, and when switch S2 closure, the PD2 pin of main control chip is low level, master control
Chip inquires whether the level of the PD2 pin is low level to start operation with interrupt mode.Peripheral circuit 4 is acousto-optic hint electricity
The PD6 pin on road, specially main control chip is connect with a LED light, and LED light is used to indicate the working condition of main control chip.Master control
Chip is communicated to connect especially by UART interface and host computer.In one embodiment, as shown in fig. 7, including assisting from processor
Chip and the peripheral circuit being connect with companion chip, wherein peripheral circuit 5 is crystal oscillating circuit, when for providing for companion chip
Clock, peripheral chip 6 are reset circuit, and companion chip is more than its time arteries and veins in the low level time for judging its RESET pin
It is resetted when rushing.Main control chip and companion chip are communicated to connect by SPI interface, for sending first voltage to companion chip
Adjustment signal, companion chip and Programmable AC Power Source are by UART interface serial communication, for receiving first voltage tune
Control Programmable AC Power Source generates predeterminated voltage after saving signal.
This programme further relates to a kind of power supply test method, for carrying out power up test, M >=2, such as Fig. 8 to M power supplys to be measured
Shown, which includes the following steps:
Step S100: predeterminated voltage is provided for each power supply to be measured.
When carrying out power up test to power supply to be measured, default alternating voltage, electricity to be measured need to be accessed in power input to be measured
Alternating voltage is switched to DC voltage and exported by source, samples the output voltage of power output end to be measured to complete to test.
Step S200: the connection of the output end of primary processor and the power supply to be measured and the electricity to be measured to connect are in turn switched on
Source provides default load, samples the output voltage of the power supply to be measured of the connection.
In the present solution, the test of multiple power supplys to be measured can be completed within a test period using primary processor, because
Primary processor can only once sample the output voltage of a power supply to be measured, it is therefore desirable in turn switch on primary processor and power supply to be measured
The connection of output end simultaneously provides default load for the power supply to be measured connected, and successively samples the output voltage of each power supply to be measured.
Step S300: predeterminated voltage or default load are adjusted, step S200 is repeated.
The output voltage of power supply to be measured is sampled, the source regulation and adjustment of load of power supply to be measured are finally calculated
Rate judges whether the power supply to be measured is qualified by source regulation and load regulation.In one embodiment, in step S200
Default load can be set as full load condition, and adjusting predeterminated voltage is voltage rating, maximum variation voltage and minimum change voltage, and is divided
The output voltage for not sampling power supply to be measured under different predeterminated voltages, can calculate the source regulation of power supply to be measured.In another implementation
In example, the predeterminated voltage in step S100 can be set as voltage rating, adjust default load as fully loaded, minimum load, and adopt respectively
The output voltage of power supply to be measured, can calculate the load regulation of power supply to be measured under sample different loads, according to source regulation and negative
Carry regulation may determine that whether power supply to be measured is qualified.
In one embodiment, power supply test method further includes ripple test, and ripple test method is specially to obtain electricity to be measured
The output voltage in source simultaneously filters out the ripple in the output voltage and subtracts to obtain DC component, then by the output voltage of power supply to be measured
The ripple in output voltage can be obtained in the DC component, thus knows the ripple content of output voltage.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of power detecting system, for carrying out power up test, M >=2, which is characterized in that the power supply to M power supplys to be measured
Test macro includes:
Primary processor controls signal for output multi-channel and successively samples to the output voltage of each power supply to be measured；
Exchange powers on module, and one end is connect with the primary processor, and the other end is used for connecting with the input terminal of each power supply to be measured
In the first control signal for receiving the primary processor and predeterminated voltage is provided for each power supply to be measured；
Sampling control module, including the first control terminal, the first output end and M first input end, each first input end are used for
Connect with the output end of a power supply to be measured, first output end is connect with the primary processor, first control terminal with
The primary processor connection, for receiving the second control signal of the primary processor and in turn switching on each first input end and institute
State the first output end；With
Load blocks connect with the primary processor and are used to be connected to the output end of each power supply to be measured, for receiving
It states the third control signal of primary processor and provides default load for each power supply to be measured.
2. test macro as described in claim 1, which is characterized in that the exchange powers on module and includes from processor, can compile
Journey AC power source with exchange electric control module, the first control signal includes first voltage adjustment signal and first switch letter
Number, it is described to be communicated to connect respectively with the primary processor and the Programmable AC Power Source from processor, for receiving the master
The first voltage adjustment signal of processor simultaneously controls the Programmable AC Power Source generation predeterminated voltage, electric control in the exchange
Module includes the second input terminal, the second control terminal and second output terminal, second input terminal and the Programmable AC Power Source
Output end connection, the second output terminal with the input terminal of each power supply to be measured for connecting, second control terminal and the master
Processor connection, for receiving the first switch signal of the primary processor and controlling the logical of electric control module in the exchange
It is disconnected.
3. test macro as described in claim 1, which is characterized in that the sampling control module includes:
The input terminal of decoder, the decoder is connect as the control terminal of the sampling control module with the primary processor,
For receiving the second control signal of the primary processor, the decoder includes M output end, each output of the decoder
End is respectively used to one corresponding level signal of output；
M first switch unit, one first as the sampling control module of the input terminal of each first switch unit
Input terminal, for connecting with the output end of a power supply to be measured, the output end of each first switch unit is connected described in conduct
First output end of sampling control module is connect with the primary processor, the control terminal of each first switch unit respectively with institute
The output end connection for stating decoder, for controlling each first switch according to the level signal of the decoder output
The on-off of unit.
4. test macro as claimed in claim 3, which is characterized in that the first switch unit includes:
First switch tube, the control terminal of the first switch tube is connect with an output end of the decoder, for receiving
The level signal of decoder output is stated to control the on-off of the first switch tube；
First relay, input terminal of the input terminal of first relay as the first switch unit are used for and one
The output end of power supply to be measured connects, the output end of first relay as the first switch unit output end with it is described
Primary processor connection, the control terminal of first relay are connect with the first switch tube, for according to the first switch
The on-off of pipe controls the on-off of first relay.
5. test macro as described in claim 1, which is characterized in that the load blocks include ruling voltage generation module and
Current regulating module, the ruling voltage generation module are connect with the primary processor, for receiving the of the primary processor
Three control signals simultaneously export suitable ruling voltage, and the current regulating module is opened including the first amplifier, sampling resistor and second
Guan Guan, the normal phase input end of first amplifier are connect with the ruling voltage generation module, for obtaining the ruling voltage,
One end of the sampling resistor is connected to the first output end of the sampling control module by second switch, and with described
The inverting input terminal of one amplifier connects, the other end ground connection of the sampling resistor, the control terminal of the second switch with it is described
The output end of first amplifier connects.
6. test macro as claimed in claim 5, which is characterized in that the ruling voltage generation module include the second amplifier,
Zener diode, adjustable resistance module and the first to the 5th resistance, the normal phase input end of second amplifier pass through first resistor
It is connected to the first output end of the sampling control module, the inverting input terminal of second amplifier is grounded by 3rd resistor,
And the output end of second amplifier is connected to by second resistance, the backward end of the zener diode is respectively connected to described
The normal phase input end of second amplifier, the output end that second amplifier is connected to by the 4th resistance and by the 5th resistance connect
It is connected to one end of adjustable resistance module, the other end ground connection of the adjustable resistance module, the control terminal of the adjustable resistance module
It is connect with the primary processor to receive the third of primary processor control signal, the adjustable resistance module is used for according to institute
It states third control signal and generates suitable adjustable resistance, the connecting pin of the 5th resistance and the adjustable resistance module is as institute
State the output end output ruling voltage of ruling voltage generation module.
7. test macro as described in claim 1, which is characterized in that the power detecting system further includes ripple processing mould
Block, the ripple processing module include filter unit and subtrator, the input terminal of the filter unit and the controlling of sampling
First output end of module connects, for obtaining and filtering out the ripple of the electric power output voltage to be measured, the subtrator
One input terminal is connect with the output end of the filter unit, and the first output end of another input terminal and the sampling control module connects
It connects, the subtrator is used to obtain the ripple in the electric power output voltage to be measured, the output end of the subtraction circuit and institute
State primary processor connection.
8. test macro as described in claim 1, which is characterized in that the power detecting system further includes host computer, described
Host computer and the primary processor communicate to connect, for issuing test instruction to the primary processor and obtaining the primary processor
Sampled data.
9. a kind of power supply test method, for carrying out power up test, M >=2, which is characterized in that the power supply to M power supplys to be measured
Test method includes:
Step A: predeterminated voltage is provided for each power supply to be measured；
Step B: in turn switching on the connection of primary processor and the output end of the power supply to be measured and provides for the power supply to be measured connected
Default load, successively samples the output voltage of the power supply to be measured of the connection；
Step C: predeterminated voltage or default load are adjusted, step B is repeated.
10. power supply test method as claimed in claim 9, which is characterized in that the power supply test method further includes that ripple is surveyed
Method for testing, the ripple test method include:
It obtains the output voltage for connecting power supply to be measured and the ripple for filtering out the output voltage obtains DC component；
The output voltage is subtracted into the DC component and obtains the ripple of the output voltage.
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