CN109342931A - A kind of the power interruptions test macro and its test method of precision voltage source - Google Patents
A kind of the power interruptions test macro and its test method of precision voltage source Download PDFInfo
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- CN109342931A CN109342931A CN201811373341.8A CN201811373341A CN109342931A CN 109342931 A CN109342931 A CN 109342931A CN 201811373341 A CN201811373341 A CN 201811373341A CN 109342931 A CN109342931 A CN 109342931A
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- test
- power interruptions
- resistance
- power
- switch
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Classifications
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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
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
- G01R31/2827—Testing of electronic protection circuits
Abstract
The invention discloses the power interruptions test macros and its test method of a kind of precision voltage source.The power interruptions test macro of the precision voltage source, interruption performance test equipment and power supply including connecting equipment under test, it is characterized by: being equipped with a power interruptions module between the power supply and the equipment under test, the interruption performance test equipment feedback control connects the power interruptions module, method includes the following steps: the power supply normally exports, power interruptions module described in interruption performance test equipment feedback control exports normal accurate supply voltage, the power interruptions test macro control flow is simple, the performance of accurate test power interruptions protection circuit, power interruptions tilted object precision is high, accuracy rate is big, effectively preventing voltage is influenced by switching and load, this method test is simple, fast.
Description
Technical field
The present invention relates to power interruptions protection circuit more particularly to a kind of precision voltage source power interruptions test macro and its
Test method.
Background technique
With the development of electronic technology, a large amount of direct current supply electricity has been used in the modernization such as aircraft, automobile complication system
Sub- equipment, since these electronic equipments will often bear the external stresses such as strong vibration, impact, environmental change at work,
It, which is powered, is easy to produce fluctuation even interruption, therefore devises the electronic equipment that this kind of on-fixed uses for power interruptions
Protection circuit, that is, should not be influenced when there are instantaneous external power interruptions electronic equipment internal normal work.
In order to verify the functional performance of power interruptions protection circuit, test macro is needed to have the energy of analog power interruption
Power, the method that traditional method is restored again using switch (relay or analog switch) instantaneous trip power supply, can test power supply
Whether protection circuit works, but there are the following problems:
1) intelligent testing tries out whether power protecting circuit works in the case where centainly interrupting width, but interrupting width cannot be accurate
It sets (the relay switch time is ms grades), can not accurately test out the limiting performance of power interruptions protection circuit, such as limit
Interrupt width etc.；
2) it can make to interrupt width and set using analog switch to reach 10us grades, but be serially connected into the simulated switch meeting in power supply line
Electricity consumption side voltage is caused to be decreased obviously (power analog switch internal resistance is up to 1 Ω or more), and reduced voltage is with load current
Variation is unable to satisfy high-accuracy voltage supply and test to the electronic equipment for needing precision voltage source to power.
Summary of the invention
In order to make up for the deficiencies of the prior art, the present invention provides a kind of power interruptions test macro of precision voltage source and its
Test method, the power interruptions test macro control flow is simple, the accurate performance for testing power interruptions protection circuit, in power supply
Disconnected tilted object precision is high, accuracy rate is big, and effectively preventing voltage is influenced by switching and load, and this method test is simple, fastly
Victory, can be by setting test of the different voltage value realizations to distinct device, to solve problems of the prior art.
The present invention is achieved through the following technical solutions:
A kind of power interruptions test macro of precision voltage source, interruption performance test equipment and confession including connecting equipment under test
Power supply, is equipped with a power interruptions module between the power supply and the equipment under test, and the interruption performance test is set
Standby feedback control connects the power interruptions module.
Ground is advanced optimized, the power interruptions module includes an analog switch being connected with the power supply,
The other end of analog switch is connected with the input terminal of a linear voltage regulator, and described be tested of output end connection of linear voltage regulator sets
It is standby；The power interruptions module further includes having a control circuit, and control circuit control connects the analog switch, and control circuit is logical
Cross the control terminal that a voltage-regulating circuit connects the linear voltage regulator, the interruption performance test equipment feedback control connection control
Circuit processed.
Ground is advanced optimized, the analog switch includes the field-effect tube Q3 that a source electrode connects the power supply, field
It is grounded after the one capacitor C9 of drain series of effect pipe Q3.
Ground is advanced optimized, the control circuit includes an external control signal F_CTL, and external control signal F_CTL connects
It is connected to a resistance R24, the other end of resistance R24 is connected with the base stage of a triode Q1, the collector connection field effect of triode Q1
Should pipe Q3 grid and a resistance R21, resistance R21 the other end connection field-effect tube Q3 source electrode, the emitter of triode Q1
Ground connection.
Ground is advanced optimized, the linear voltage regulator is the linear regulator chip of model LM338K.
Ground is advanced optimized, the voltage-regulating circuit includes switch S1-S4, and one end of switch S4 is grounded, and the other end connects
A resistance R51, one end ground connection of switch S3 are met, the other end connects a resistance R27, one end ground connection of switch S2, other end connection
One end of one resistance R28, switch S1 are grounded, and the other end connects a resistance R29, resistance R51, resistance R27, resistance R28 and resistance
The other end of R29 connects linear voltage regulator control pin ADJ and a resistance R50, resistance R50 after being connected connect linear voltage regulator
Output end, linear voltage regulator output end connection one ground connection capacitor C8 and equipment under test.
Ground is advanced optimized, the control circuit further includes the S1-S4 switch relay of control switch S1-S4 movement.
Ground is advanced optimized, the hand control switch S1-S4 can replace S1-S4 switch relay.
A kind of test method of the power interruptions test macro of precision voltage source as described in claim 1, comprising the following steps:
S1: the power supply normally exports, the output of power interruptions module described in interruption performance test equipment feedback control
Normal accurate supply voltage；
S2: the equipment under test normally connects electricity, and interruption performance test equipment is completed to test the normal function of equipment under test；
S3: the initial value P of the power interruptions width of the interruption performance test equipment setting power interruptions module；
S4: the power interruptions module generates power interruptions；
S5: whether the interruption performance test equipment test equipment under test is normal；
S6: if the equipment under test function is abnormal, then interruption performance test equipment record current power interrupts width
Value P；If the equipment under test function is normal, then the power interruptions for the power interruptions module that interruption performance test equipment is set
Width P increases by 1 breadth, and returns to step S4.
1 width be 1 millisecond -1 second.
The beneficial effects of the present invention are: this system provides the method for accurate test power interruptions protection circuit performance, electricity
The precision that width is interrupted in source is high, and provided voltage can not be influenced by switching and loading.
The system circuit design is simple, Cheap highly effective, and can convenient program-controlled setting different voltages it is different to adapt to
Equipment under test application has very strong versatility, and the power interruptions width accuracy of test is big, width is big, answers suitable for being widely popularized
With.
Detailed description of the invention
Fig. 1 is structural block diagram of the invention.
Fig. 2 is circuit connection diagram of the invention.
Fig. 3 is control flow chart of the invention.
Fig. 4 is that voltage of the invention adjusts control principle drawing.
Specific embodiment
In order to clarify the technical characteristics of the invention, below by specific embodiment, and its attached drawing is combined, to this hair
It is bright to be described in detail.
As shown in Figure 1-Figure 3, present embodiment discloses a kind of power interruptions test macros of precision voltage source, including connection quilt
The interruption performance test equipment and power supply of measurement equipment are equipped with a power supply between the power supply and the equipment under test
Interrupt module, the interruption performance test equipment feedback control connect the power interruptions module.
As a preferred embodiment, the power interruptions module includes one to be connected with the power supply
Analog switch, the other end of analog switch are connected with the input terminal of a linear voltage regulator, and the output end of linear voltage regulator connects institute
State equipment under test；The power interruptions module further includes having a control circuit, and control circuit control connects the analog switch, control
Circuit processed connects the control terminal of the linear voltage regulator, the interruption performance test equipment feedback control by a voltage-regulating circuit
System connection control circuit.
As a preferred embodiment, the analog switch includes the field effect that a source electrode connects the power supply
Should pipe Q3, be grounded after the one capacitor C9 of drain series of field-effect tube Q3.Analog switch is field-effect tube Q3, using power MOSFET
Or the high speeds controllable devices such as IGBT.
As a preferred embodiment, the control circuit includes an external control signal F_CTL, outside control letter
Number F_CTL is connected with a resistance R24, and the other end of resistance R24 is connected with the base stage of a triode Q1, the collector of triode Q1
Connect the source electrode of the grid of field-effect tube Q3 and the other end connection field-effect tube Q3 of a resistance R21, resistance R21, triode Q1
Emitter ground connection.The whole control circuit using triode Q1+ resistance R21+ resistance R22 composition, for controlling field-effect tube
The disconnection and conducting of Q3, concrete principle are as follows: resistance R21+ resistance R22 series connection partial pressure provides suitable biased electrical for field-effect tube Q3
It presses, wherein I/O signal of the external control signal F_CTL for FPGA, high level 3.3V, low level 0V, when F_CTL is 0V, three poles
Pipe Q1 ends, and the partial pressure on resistance R21 is 0, and field-effect tube Q3 is disconnected；When F_CTL is 3.3V, triode Q1 conducting, 35V leads to
It crosses resistance R21+ resistance R22 series connection partial pressure and provides bias voltage to field-effect tube Q3, field-effect tube Q3 is connected.
As a preferred embodiment, the linear voltage regulator is the linear regulator chip of model LM338K, energy
Enough meet the pressure stabilizing fan-out capability of 1.2V~32V/5A.
As a preferred embodiment, the voltage-regulating circuit includes switch S1-S4, a termination of switch S4
Ground, the other end connect a resistance R51, one end ground connection of switch S3, and the other end connects a resistance R27, and one end of switch S2 is grounded,
The other end connects a resistance R28, one end ground connection of switch S1, and the other end connects a resistance R29, resistance R51, resistance R27, resistance
R28 connects the other end connection of the control pin ADJ and a resistance R50, resistance R50 of linear voltage regulator after being connected with resistance R29
The output end of linear voltage regulator, the capacitor C8 and equipment under test of one ground connection of output end connection of linear voltage regulator.
Wherein, the work that voltage-regulating circuit adjusts voltage by resistance R51, resistance R27, resistance R28 and resistance R29 is former
It manages as follows:
As shown in figure 4, wherein VREFRepresentative value is 1.25V, IADJRepresentative value is 50 μ A, therefore can be calculated as needed required
R1 and R2, realize the selection of output voltage values.
Calculation formula are as follows:
Here 4 kinds of different divider resistance values (resistance R50 and resistance R51, electricity are selected using 4 relay switch S1-S4
Hinder R27, resistance R28, resistance R29 partial pressure) realize 4 kinds of output voltages selection, relay control and driving signal from control
Circuit processed, wherein " switch S1-S4 control " signal is realized by the IO control relay drive circuit of FPGA.Here relay switch
S1-S4 is also changed to manual switch, and being merely to illustrate output voltage values herein can be configured as needed.
As a preferred embodiment, the control circuit further includes the S1-S4 switch of control switch S1-S4 movement
Relay.
As a preferred embodiment, the hand control switch S1-S4 can replace S1-S4 switch relay.
A kind of test method of the power interruptions test macro of precision voltage source as described in claim 1, comprising the following steps:
S1: the power supply normally exports, the output of power interruptions module described in interruption performance test equipment feedback control
Normal accurate supply voltage；
S2: the equipment under test normally connects electricity, and interruption performance test equipment is completed to test the normal function of equipment under test；
S3: the initial value P of the power interruptions width of the interruption performance test equipment setting power interruptions module；
S4: the power interruptions module generates power interruptions；
S5: whether the interruption performance test equipment test equipment under test is normal；
S6: if the equipment under test function is abnormal, then interruption performance test equipment record current power interrupts width
Value P；If the equipment under test function is normal, then the power interruptions for the power interruptions module that interruption performance test equipment is set
Width P increases by 1 breadth, and returns to step S4.
As shown in fig. 1, in which:
Uo-equipment under test power supply signal；
Ui-input power interrupt module power supply；
U1-power interruptions inside modules intermediate voltage signal, U1 voltage value is between Uo and Ui.
Analog switch-realizes the power interruptions control of 10us class precision；
Linear voltage regulator-selects fixed voltage or adjustable voltage as needed, and the dynamic of voltage-stablizer is required to ring here
Answer speed fast, to meet the index of 10us grades of input/output signals variation；
Voltage-regulating circuit-cooperation voltage-stablizer realizes the program-controlled adjustment of final output voltage, requires DAC, potentiometer here
Precision should meet output voltage precision needs；
Control circuit-is for generating switch control signal, and control voltage-regulating circuit.
The analog switch control signal that switch control signal-is generated by control circuit, generally pulse signal, it can be achieved that
10us grades accurate program-controlled
Normally whether interruption performance test equipment-work for testing equipment under test when power supply interrupts.
The working principle of the power interruptions test macro of precision voltage source of the present invention is as follows: after determining equipment under test, first
It determines the power supply of equipment under test, divider resistance value (i.e. resistance R50 and resistance is then calculated according to above-mentioned calculation formula
R51, resistance R27, resistance R28, the partial pressure between resistance R29), and then determine opening and closing situation that switch S1-S4 is respectively switched, so
Afterwards, realize output voltage in linear voltage regulator come corresponding on-off switch S1-S4 by manual or relay switch S1-S4
Under the action of be equal to equipment under test work normally input voltage value, then, interruption performance test equipment is communicated with FPGA, by
FPGA issues pulse signal, to control on and off of the F_CTL realization to field-effect tube Q3 according to certain rule, and then realizes
To equipment under test according to the power failure of certain rule, interruption performance test equipment is to the equipment under test during underway break
Performance test is done, judges whether equipment under test function is normal, when FPGA issues pulse signal, is gradually increased according to width is interrupted
The rule added issues, and when equipment under test function works abnormal under some width, the limit of circuit is just protected for power interruptions
Interrupt width.
Test method of the invention is:
S1: the power supply normally exports, the output of power interruptions module described in interruption performance test equipment feedback control
Normal accurate supply voltage, to equipment under test normal power supply；
S2: the equipment under test normally connects electricity, and interruption performance test equipment is completed to test the normal function of equipment under test；
S3: the initial value P of the power interruptions width of the interruption performance test equipment setting power interruptions module interrupts
Performance test apparatus is communicated with FPGA, issues pulse signal by FPGA, is realized to field-effect tube Q3 to control F_CTL according to certain
The on and off of rule, the width of field-effect tube Q3 off state are to interrupt width；
S4: field-effect tube Q3 cut-off, power interruptions module generate power interruptions；
S5: whether interruption performance test equipment tests equipment under test work under this power interruptions width normal；
S6: if the equipment under test function is abnormal, then interruption performance test equipment record current power interrupts width
Value P '；If the equipment under test function is normal, then the power interruptions of the power interruptions module of interruption performance test equipment setting are wide
It spends P and increases by 1 breadth, and return in step S4, carry out the operation for repeating step S4, step S5 and step S6, realize in power supply
Disconnected width value must gradually increase, and until equipment under test function is abnormal, interruption performance test equipment records current power and interrupts width
The value P ' of degree.
To sum up, realize that electronic equipment power source interrupts the performance test of protection: wide by the different power interruptions of program-controlled setting
Degree and voltage realize that electronic equipment power source interrupts the accurate test of protective value, such as protection width, protection voltage；Adaptability
Equipment is extensive.
Place is not described in detail by the present invention, is the well-known technique of those skilled in the art of the present technique.Finally, it is stated that the above reality
It applies example to be only used to illustrate the technical scheme of the present invention and not to limit it, although having carried out specifically the present invention referring to preferred embodiment
It is bright, those skilled in the art should understand that, can with modification or equivalent replacement of the technical solution of the present invention are made, and
The objective and range for not departing from technical solution of the present invention, are intended to be within the scope of the claims of the invention.
Claims (9)
1. a kind of power interruptions test macro of precision voltage source, interruption performance test equipment and power supply including connecting equipment under test
Power supply, it is characterised in that: a power interruptions module, the interruptibility are equipped between the power supply and the equipment under test
It can the test equipment feedback control connection power interruptions module.
2. a kind of power interruptions test macro of precision voltage source according to claim 1, it is characterised in that: in the power supply
Disconnected module includes an analog switch being connected with the power supply, and the other end of analog switch is connected with a linear voltage stabilization
The output end of the input terminal of device, linear voltage regulator connects the equipment under test；The power interruptions module further includes having a control
Circuit, control circuit control connect the analog switch, and control circuit connects the linear voltage stabilization by a voltage-regulating circuit
The control terminal of device, the interruption performance test equipment feedback control connect control circuit.
3. a kind of power interruptions test macro of precision voltage source according to claim 2, it is characterised in that: the simulation is opened
Pass includes the field-effect tube Q3 that a source electrode connects the power supply, and the one capacitor C9 of drain series of field-effect tube Q3 is followed by
Ground.
4. a kind of power interruptions test macro of precision voltage source according to claim 3, it is characterised in that: the control electricity
Road includes an external control signal F_CTL, and external control signal F_CTL is connected with a resistance R24, and the other end of resistance R24 connects
It is connected to the base stage of a triode Q1, the grid and a resistance R21, resistance R21 of the collector connection field-effect tube Q3 of triode Q1
The other end connection field-effect tube Q3 source electrode, triode Q1 emitter ground connection.
5. a kind of power interruptions test macro of precision voltage source according to claim 2, it is characterised in that: described linear steady
Depressor is the linear regulator chip of model LM338K.
6. a kind of power interruptions test macro of precision voltage source according to claim 5, it is characterised in that: the voltage tune
Whole circuit includes switch S1-S4, and one end of switch S4 is grounded, and the other end connects a resistance R51, and one end of switch S3 is grounded, separately
One end connects a resistance R27, one end ground connection of switch S2, and the other end connects a resistance R28, and one end ground connection of switch S1 is another
One resistance R29 of end connection, resistance R51, resistance R27, resistance R28 connect linear voltage regulator control after being connected with resistance R29 are drawn
The other end of foot ADJ and a resistance R50, resistance R50 connect the output end of linear voltage regulator, the output end connection of linear voltage regulator
The capacitor C8 and equipment under test of one ground connection.
7. a kind of power interruptions test macro of precision voltage source according to claim 6, it is characterised in that: the control electricity
Road further includes the S1-S4 switch relay of control switch S1-S4 movement.
8. a kind of power interruptions test macro of precision voltage source according to claim 7, it is characterised in that: the manual control
System switch S1-S4 can replace S1-S4 switch relay.
9. a kind of test method of the power interruptions test macro of precision voltage source as described in claim 1, it is characterised in that: including
Following steps:
S1: the power supply normally exports, and the output of power interruptions module described in interruption performance test equipment feedback control is normal
Accurate supply voltage；
S2: the equipment under test normally connects electricity, and interruption performance test equipment is completed to test the normal function of equipment under test；
S3: the initial value P of the power interruptions width of the interruption performance test equipment setting power interruptions module；
S4: the power interruptions module generates power interruptions；
S5: whether the interruption performance test equipment test equipment under test is normal；
S6: if the equipment under test function is abnormal, then interruption performance test equipment record current power interrupts the value P of width；
If the equipment under test function is normal, then the power interruptions width for the power interruptions module that interruption performance test equipment is set
P increases by 1 breadth, and returns to step S4.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810825489 | 2018-07-25 | ||
| CN2018108254894 | 2018-07-25 |
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| CN109342931A true CN109342931A (en) | 2019-02-15 |
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ID=65315985
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110781045A (en) * | 2019-10-24 | 2020-02-11 | 山东超越数控电子股份有限公司 | FPGA-based CPU IO interruption performance testing device |
| CN112945276A (en) * | 2021-02-06 | 2021-06-11 | 南京工业职业技术大学 | Automatic power supply environment and functional performance testing device for subway vehicle electronic odometer |
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