CN104297698B - A detection device for power components - Google Patents
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- CN104297698B CN104297698B CN201310642356.0A CN201310642356A CN104297698B CN 104297698 B CN104297698 B CN 104297698B CN 201310642356 A CN201310642356 A CN 201310642356A CN 104297698 B CN104297698 B CN 104297698B
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Abstract
The present invention relates to a kind of detection devices of power supply module, it mainly include single-chip microcontroller, electronic load and multicircuit switch, multicircuit switch is made of decoder and corresponding one group of channel relay, whether making the channel actuating of relay by single-chip microcontroller control, realize that the corresponding channel of power supply module is established or cuts off the connection with electronic load, to realize the multi-channel detection of the power supply module of automation.
Description
Technical field
The present invention relates to a kind of detection devices of power supply module.
Background technique
Power supply module is one of component part of certain product, and using 115V three-phase alternating-current powered, output multi-channel voltage is such as schemed
Shown in 2 left sides.Special detection device there is no to detect the stability and load capacity of its each road voltage at present, Jin Jinyi
Its voltage is simply measured by means of voltmeter by operator, can not accurately detect it under various loading conditions
Voltage stabilization situation can not detect the phase sequence of voltage ripple size and three-phase 115V supply voltage.
Summary of the invention
The object of the present invention is to provide a kind of detection devices of power supply module, and to solve, efficiency of manual measurement is low, tests
The problem of inaccuracy.
To achieve the above object, the solution of the present invention includes:
A kind of detection device of power supply module, including single-chip microcontroller, multicircuit switch and electronic load, the multipath conversion
Switch is made of decoder and one group of channel relay, and the single-chip microcontroller control connects the decoder, the output pair of decoder
Each channel relay should be connected, channel relay is at least used between the corresponding channel and electronic load of on-off power supply module
Connection.
The channel relay is also used to the connection between switching detection device power supply unit and electronic load.
The detection device further includes power module, and power module is included at least and exported all the way, and the output passes through correspondence
Channel relay connect electronic load.
The detection device is additionally provided with as the power interface (220V) of its power supply and the three-phase for powering for power supply module
Power interface (115V).
Detection device is additionally provided with three-phase alternating-current supply circuit of testing the phase sequence.It can be realized using commercial product.
The single-chip microcontroller is also connected with display circuit and keyboard input circuit.
Detection interface is equipped between the detection device and power supply module, detection interface includes connector and cable.This hair
Bright detection device mainly includes single-chip microcontroller, electronic load and multicircuit switch, and multicircuit switch is by decoder and correspondence
One group of channel relay constitute, whether making the channel actuating of relay by single-chip microcontroller control, realize that the correspondence of power supply module is logical
Road is established or the connection of cutting and electronic load, to realize the multi-channel detection of the power supply module of automation.
Further, decoder, which also controls, a vacant channel, for first switching to road sky when channel switches
Remaining output turns again to the power supply to be switched output, to guarantee first to disconnect, then connects.
Further, single-chip microcontroller and its expanded circuit (including display) form control and display unit, are not only completed inspection
The control function of device is surveyed, and provides man machine operation interface and display interface for user.
Further, the present invention is also configured with three-phase alternating current phase sequence testing circuit, three-phase alternating current phase sequence testing circuit
It must assure that phase sequence is correct and cannot by three-phase alternating current 115V, 400Hz power supply that detection device is output to tested power supply module
Phase shortage, it is therefore desirable to design corresponding Phase sequence detection and open-phase protection circuit.In phase order of 3-phase AC mistake or phase shortage feelings
Under condition, Phase sequence detection and open-phase protection circuit work, three-phase alternating current cannot be input in tested power supply module, be avoided to tested
The damage of power supply.
Further, detection interface is equipped between the present invention and power supply module, it is real using standardized connector and cable
Quick connection between multiple channels of existing power supply module and the multiple detection ports of the present invention.
Detailed description of the invention
Fig. 1 is composition block diagram of the invention；
Fig. 2 is that the present invention with power supply module connect block diagram；
Fig. 3 is the front panel design block diagram of the embodiment of the present invention；
Fig. 4 is the rear panel design frame chart of the embodiment of the present invention；
Fig. 5 is the design principle block diagram of the embodiment of the present invention；
Fig. 6 is 4 × 4 keyboard scanning circuit figures of the embodiment of the present invention；
Fig. 7 is " timer 1 " of the embodiment of the present invention, " timer 2 " key circuit figure；
Fig. 8 is the display interface circuit figure of the embodiment of the present invention；
Fig. 9 is decoder and relay drive circuit figure in the multicircuit switch circuit of the embodiment of the present invention；
Figure 10 is that relay with electronic load connect circuit diagram in the multicircuit switch of the embodiment of the present invention；
Figure 11 is the single-chip microcontroller and electronic load serial interface circuit figure of the embodiment of the present invention；
Figure 12 is the hardware " house dog " and reset circuit figure of the embodiment of the present invention；
Figure 13 is the Phase sequence detection and open-phase protection circuit figure of the embodiment of the present invention；
Figure 14 is the total program flow diagram of software of the embodiment of the present invention.
Specific embodiment
The present invention will be further described in detail with reference to the accompanying drawing.
Detection device of the invention mainly includes single-chip microcontroller, electronic load and multicircuit switch, multicircuit switch by
Decoder and corresponding one group of channel relay are constituted, and whether making the channel actuating of relay by single-chip microcontroller control, realize power supply
The corresponding channel of component is established or the connection of cutting and electronic load, to realize the multichannel of the power supply module of automation
Detection.
In embodiment as shown in Figure 1, 2, detection device mainly includes that control and display unit, electronic load, multichannel turn
Change switch, power module, detection interface and three-phase alternating current phase sequence testing circuit.
Control and display unit, are mainly made of single-chip microcontroller and single-chip microcomputer extension circuit, the main control for completing detection device
Function processed, and man machine operation interface and display interface are provided for user.
Electronic load, primarily as the fictitious load of tested power supply, adjustable constant load characteristic adapts to different outputs
Requirement.Electronic load also provides voltage and current and shows.It can be realized by changing the state of electronic load unloaded and full
The switching of load.
Multicircuit switch, the part are by monolithic processor controlled one switching circuit of multiselect, in order to by 13 road quilts
It surveys power supply to be respectively turned on electronic load according to the control of man machine operation interface, to complete measurement and display；
Power module, the working power of the part offer+5V ,+27V ,+5V ,+27V power supply are also for detected electricity simultaneously
Source component uses.
Interface is detected, which is detection device to the connecting interface between tested power supply module, including connector and electricity
Cable.
Three-phase alternating current phase sequence testing circuit, by detection device be output to tested power supply module three-phase alternating current 115V,
400Hz power supply must assure that phase sequence is correct and is unable to phase shortage, it is therefore desirable to design corresponding Phase sequence detection and open-phase protection electricity
Road.In phase order of 3-phase AC mistake or phase shortage, Phase sequence detection and open-phase protection circuit work, three-phase alternating current is not
It can be input in tested power supply module, avoid the damage to tested power supply.
From the point of view of appearance, in line with debugging, simple, facility compact purpose, the detection device of power supply module select prestige figure electronics
The 19 of production " standard PC case, model 3981160,6U height, outer dimension be 483mm × 430mm × 256mm (it is long × wide ×
It is high), horizontal handle is installed, cabinet primary colours are 7035(stone ash).Its metal cabinet can provide basic EMC protection.Machine
Left-half installs the printed board of single-chip microcontroller control unit, relay cloth for installing electronic load cabinet, right half part in case
Power module is installed in office's plate, side.
Inside cable mainly by detection cable socket to transit cable socket, detection cable socket to front panel instrument connection,
The interfaces such as indicator light, key.
Front panel mainly installs key, indicator light, the devices such as instrument connection, power switch.Rear panel places cable socket, electricity
The devices such as source input socket interface, RS232 communication interface.
Front panel design is as shown in figure 3, rear panel design is illustrated in fig. 4 shown below.
The major function of the detection device of power supply module is as follows:
A) provide three-phase 115V(for power supply module and connect laboratory 115V power supply, after debugging platform transfer), direct current+5V and direct current
+ 27V power supply (laboratory 220V power supply is generated by power module)；
B) have three-phase 115V supply voltage, electric current and phase sequence and pile defection and display function；Three-phase 115V power supply
It is transferred to power supply module to be measured by detection device, provides input for power supply module to be measured, to generate relevant voltage output.
C) each road output voltage of power supply module, electric current, ripple and product hour counter working condition are detected；
D) has power-on self-test brake.
Specific detection process is as follows:
The detection device of power supply module connect as shown in Figure 2 with power supply module it is correct after, according to Fig. 3 by the inspection of power supply module
The power switch surveyed on device front panel gets to the position of connection, opens electronic load power switch (electronic load power switch
Normally open can also be placed in), 220V/50Hz AC power source is connected first, and the power supply unit of detection device is started to work, and is generated
+ 5V and+27V lights+5V and+27V indicator light, while Phase sequence detection and open-phase protection circuit work, with judgement and detection device
Whether phase sequence is correct and not phase shortage for connected 115V, 400Hz three-phase alternating current, normally then powers to rear class.Detection device is opened
Initialization begin with self-test work, single-chip microcontroller initiates to communicate to electronic load, receives single-chip microcontroller setting Electronic Negative after correct response
It carries initial operation mode (fixed current mode, zero current), shielding electronic load keyboard input, and 14 He of control channel relay
Channel relay 15 is switched over 5s time interval, makes the measured value of electronic load display+5V and+27V in turn, and by serial ports
The corresponding measured value that reads back is judged；It detects Phase sequence detection simultaneously and whether the state of open-phase protection circuit is normal.On if
It states state and all meets normal requirement, " self-test is normal " indicator light is lighted." lamp test " button is pressed at this time, and institute is lighted in scanning display
There is indicator light, unclamp " lamp test " button, all indicator lights extinguish.Above step judges the inspection of power supply module for operator's observation
It whether normal surveys device, if " self-test is normal " indicator light is lighted, next step operation can be carried out, otherwise the detection of power supply module
Device will forbid other operations in addition to power-off, reset, lamp test automatically.
After self-test normally completes, Pen-down detection device " be powered detection " button, the button indicating lamp is lighted, detection device
Control multicircuit switch is switched to vacant output, and detection device exports electrical instruction to power supply module, and detection device enters survey
Preparation state is tried, electronic load is in initial operation mode and voltage and current shows all be zero.
Any of 13 power knobs to be measured of Pen-down detection device at this time, corresponding button indicating lamp is lighted, detection
Device control multicircuit switch is switched to respective channel, and supply voltage to be measured is added to electronic load input terminal, electronic load
Its voltage value is shown, into no load test；" unloaded/fully loaded " button is pressed again, and fully loaded indicator light is lighted, detection device setting electricity
Son load is the output-current rating value of this road power supply, and electronic load shows its voltage and current value, into full load test.This
When, other road power supply test buttons are pressed, the tested power knob indicator light of original extinguishes, new tested power knob indicator light point
It is bright, it is fully loaded with indicator light and extinguishes, single-chip microcontroller setting electronic load enters initial operation mode, and multicircuit switch is switched to vacant defeated
Out, after certain time-delay (100ms), multicircuit switch is switched to new tested power channel, into no load test.So
It is repeatable to test all power supplys to be measured.
" timer 1 " and " timer 2 " is locking key, and detection device is after " be powered detection " button is pressed, Ke Yigen
Corresponding control instruction signal is issued to power supply module according to the key-press status of " timer 1 " and " timer 2 ", to control power supply group
The working condition of part PT2 timer and PT3 timer.
The Reset button is pressed, detection device resets, and " be powered detection " status releasing, detection device is issued to power supply module
Power command is closed, detection device restores initialization and self-test work.
The three road self-test signals (" self-test signal 1 ", " self-test signal 2 " and " self-test signal 3 ") of power supply module are input to inspection
Device is surveyed, corresponding indicator light (" power self test 1 ", " power self test 2 " and " power self test 3 ") is driven, is sentenced for operator's observation
It is disconnected.
Single-chip computer control system design: the control system core of the detection device of power supply module is extended by single-chip microcontroller P89V51
It designing, expanded circuit includes the keyboard and display interface circuit of control and display unit, the serial interface circuit of electronic load,
The digital quantity or switch interface circuit of tested power supply, multicircuit switch interface circuit, hardware watchdog circuit, three-phase alternating current
Power phase detection and protection circuit etc..Functional block diagram is as shown in Figure 5.
The function of being realized according to single-chip microcontroller, single-chip processor i/o mouth distribution condition is as shown in table 1.
1 single-chip processor i/o mouth distribution condition list of table
| Serial number | I/O | Effect |
| 1 | P0.0、P0.1、P0.2、P0.3 | Multicircuit switch output |
| 2 | P0.4、P0.5、P0.6、P0.7 | 4 × 4 keyboard scan output lines |
| 3 | P2.0、P2.1、P2.2、P2.3 | 4 × 4 keyboards reply input line |
| 4 | P2.4、P2.5、P2.7、P2.6 | Two backup keys and timer 1,2 key light are every input |
| 5 | P1.0 | The detection of three-phase 115V power phase and protection circuit input |
| 6 | P1.1 | The output of energization detection instruction |
| 7 | P1.3、P1.4、P1.5 | Series display controls delivery outlet |
| 8 | P1.6 | Buzzer control output |
| 9 | P1.7 | Hardware " house dog " circuit feeds pulse output |
| 10 | P3.0、P3.1 | Asynchronous serial communication mouth |
| 11 | P3.2、P3.3、P3.4 | 1,2,3 signal light of power self test is every input terminal |
Keyboard and display interface circuit design: in the manipulation button of the detection device of power supply module, "+27V ", "+24V ", "-
24V ", " adjustable 1 ", " adjustable 2 ", "+20V ", " -20V ", "+15V ", " -15V ", "+40V I ", "+40V II ", "+12V ", "+
Totally 16 band button compositions 4 × 4 scan keyboard circuit for 5V ", " be powered and detect ", " lamp test ", " unloaded/fully loaded ".Its circuit
Figure is as shown in Figure 6." timer 1 ", the key circuit of " timer 2 " are as shown in Figure 7.
3 6B595 shift registers composition serial shift display circuits of display interface circuit selection, driving "+27V ", "+
24V ", " -24V ", " adjustable 1 ", " adjustable 2 ", "+20V ", " -20V ", "+15V ", " -15V ", "+40V I ", "+40V II ", "+
12V ", "+5V ", " be powered detection ", " lamp test ", " unloaded/fully loaded ", " self-test is normal ", " power self test 1 ", " power self test
2 ", " power self test 3 " indicator light.Its display interface circuit is as shown in Figure 8."+5V " and "+27V " indicator light is by detection device electricity
Source block output provides driving.The positive-negative power both ends caused by power supply unit are connect respectively." electricity is provided by tested power supply module
Signal from inspection 1 ", " power self test 2 ", " power self test 3 " controls output display by single-chip microcontroller after Phototube Coupling.
Multicircuit switch circuit design: the core component multicircuit switch of the detection device of power supply module is by single-chip microcontroller
P89V51 extension designs, using 4 I/O mouthfuls of inputs as 4-16 line decoder of P89V51, then by the defeated of decoder
Relay is driven to complete switching of the different electrical power to electronic load, out to guarantee unique gating of multicircuit switch.Decoding
Device and relay drive circuit are as shown in Figure 9.When realizing switching of the different electrical power to electronic load, road sky is first switched to
Remaining output turns again to the power supply to be switched output, to guarantee first to disconnect, then connects.In view of detection cable is full in power supply module
Bring voltage loss when carrying test will cause the deviation of measurement show value, therefore using the far-end measuring function of electronic load
(self-test function of tester) avoids measured deviation.In power supply module for each road power supply output all there are detection measurement end,
When power output end to be measured being added to the input terminal of electronic load using multicircuit switch, while utilizing the change-over switch channel
Power measurement end to be measured is added to the far-end measuring input terminal of electronic load by other contacts of relay.Therefore multipath conversion is opened
The type selecting of Central Shanxi Plain relay uses the JZX-16M relay of 4 transfer contacts, wherein two groups of contacts are used for load measure, another two groups
Contact is used for distal end voltage measurement.+ the 5V and two kinds of voltages of+27V generated by 13 road to be measured voltage signal plus this tester,
Totally 15 road voltage signals are respectively connected to the load measure end and remote test end of electronic load.Its detailed design circuit diagram such as Figure 10
It is shown.
The serial interface circuit of electronic load designs: in single-chip computer control system and electronic load communication process, using
MAX232 is as standard serial interface.Its circuit diagram is as shown in figure 11.
Hardware watchdog circuit design: in reset circuit of SCM, using hardware " house dog " circuit, system is improved
Stability and dependability.Its circuit diagram is as shown in figure 12.
Three-phase alternating-current supply Phase sequence detection and protecting circuit designed: tested power supply group is output to by power supply module detection device
Three-phase alternating current 115V, 400Hz power supply of part must assure that the correctness of phase sequence and be unable to phase shortage, it is therefore desirable to which design is corresponding
Phase sequence detection and open-phase protection circuit, physical circuit are as shown in figure 13.The circuit can guarantee in phase sequence mistake or phase shortage feelings
Under condition, by 54LS74D trigger and 54LS123 monostable flipflop by automatically cutting off A.C. contactor with disjunction three-phase electricity
Source powers to rear class.
Software design: the detection device of power supply module is carried out using the P89V51 single-chip microcontroller of enhanced 51 kernel as CPU
Design uses assembler language programming to improve code efficiency, is also convenient for the optimization of program structure.The detection device of power supply module
Program software is divided into initialization program, management program, keyboard scan and display program, self-check program, Serial Communication Program, software
House dog program etc..Initialization program mainly completes the setting of original state after system electrification；Management program is mainly completed respectively
Tissue, coordination and traffic control between program unit；Keyboard scan and display program are responsible for the processing of man-machine interface；Self-test journey
Sequence completes desired System self-test function；Serial Communication Program is responsible for communication and control to electronic load；Software watchdog journey
Sequence then monitors the software operation of entire single-chip microcontroller, to prevent program execution from richochet, crash and entanglement occur.Total program flow diagram is such as
Shown in Figure 14.
A kind of specific embodiment given above, but the present invention is not limited to described embodiment.Of the invention
Basic ideas are above scheme, and for those of ordinary skill in the art, various modifications are designed in introduction according to the present invention
Circuit, structure, parameter do not need to spend creative work.Without departing from the principles and spirit of the present invention to reality
The change, modification, replacement and modification that the mode of applying carries out are still fallen in protection scope of the present invention.
Claims (6)
1. a kind of detection device of power supply module, which is characterized in that including single-chip microcontroller, multicircuit switch and electronic load, institute
It states multicircuit switch to be made of decoder and one group of channel relay, the single-chip microcontroller control connects the decoder, decoding
The output of device is correspondingly connected with each channel relay, and channel relay is at least used for the corresponding channel and electronics of on-off power supply module
Connection between load；Detection device is additionally provided with three-phase alternating-current supply circuit of testing the phase sequence, and the decoder, which also controls, one
Vacant channel turns again to the power supply to be switched output, for first switching to the vacant channel in the road when channel switches to guarantee
It first disconnects, connect again；The detection device of the power supply module is also equipped with power-on self-test brake, after powering on, detection device
Start initialization and self-test work, single-chip microcontroller initiates to communicate to electronic load, receives single-chip microcontroller setting electronics after correct respond
Initial operation mode, shielding electronic load keyboard input are loaded, and controls two channel relays and is cut with 5s time interval
It changes, makes the measured value of electronic load display+5V and+27V in turn, and judged by the serial ports corresponding measured value that reads back, simultaneously
Whether the Phase sequence detection and open-phase protection circuit in detection three-phase alternating-current supply circuit of testing the phase sequence are normal, if above-mentioned measurement
Value, Phase sequence detection and open-phase protection circuit all meet normal requirement, then it is assumed that the detection device of power supply module is normal.
2. a kind of detection device of power supply module according to claim 1, which is characterized in that the channel relay is also used
Connection between switching detection device power supply unit and electronic load.
3. a kind of detection device of power supply module according to claim 1, which is characterized in that the detection device further includes
Power module, power module are included at least and are exported all the way, and the output connects electronic load by corresponding channel relay.
4. a kind of detection device of power supply module according to claim 1, which is characterized in that the detection device is additionally provided with
Three phase mains interface for the power interface of its power supply and for powering for power supply module.
5. a kind of detection device of power supply module according to claim 1, which is characterized in that the single-chip microcontroller is also connected with
Display circuit and keyboard input circuit.
6. a kind of detection device of power supply module according to claim 1, which is characterized in that the detection device and power supply
Detection interface is equipped between component, detection interface includes connector and cable.
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| 基于PC/104的某飞机任务电源监控系统设计与实现;李尊 等;《航空制造技术》;20110430(第4期);第85-87、91页 |
| 电源组件试验系统;李文鑫 等;《物流工程与管理》;20121231;第34卷(第221期);第183-184页 |
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| CN104297698A (en) | 2015-01-21 |
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