CN104297698A - Detection device for power supply assembly - Google Patents
Detection device for power supply assembly Download PDFInfo
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- CN104297698A CN104297698A CN201310642356.0A CN201310642356A CN104297698A CN 104297698 A CN104297698 A CN 104297698A CN 201310642356 A CN201310642356 A CN 201310642356A CN 104297698 A CN104297698 A CN 104297698A
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Abstract
The invention relates to a detection device for a power supply assembly. The detection device mainly comprises a single-chip microcomputer, an electronic load and a multi-channel change-over switch. The multi-channel change-over switch is formed by a decoder and a group of corresponding channel relays. Whether the channel relays operate is controlled by the single-chip microcomputer, and corresponding channels of the power supply assembly establish or cut off the connection with the electronic load, thereby realizing automatic multichannel detection of the power supply assembly.
Description
Technical field
The present invention relates to a kind of pick-up unit of power supply module.
Background technology
Power supply module is one of ingredient of certain product, and adopt 115V three-phase alternating-current powered, output multi-channel voltage, as shown on the left of Fig. 2.There is no special pick-up unit at present to detect the stability of its each road voltage and load capacity, operating personnel are only relied on simply to measure its voltage by means of voltage table, accurately cannot detect its voltage stabilization situation under various loading condition, more can not detect the phase sequence of voltage ripple size and three-phase 115V supply voltage.
Summary of the invention
The object of this invention is to provide a kind of pick-up unit of power supply module, in order to solve efficiency of manual measurement low, test inaccurate problem.
For achieving the above object, the solution of the present invention comprises:
A kind of pick-up unit of power supply module, comprise single-chip microcomputer, multicircuit switch and electronic load, described multicircuit switch is made up of code translator and one group of passage relay, described Single-chip Controlling connects described code translator, the output correspondence of code translator connects each passage relay, and passage relay is at least for the connection between the respective channel of power on/off source component and electronic load.
Described passage relay is also for the connection between switching detection device power supply unit and electronic load.
Described pick-up unit also comprises power module, and power module at least comprises a road and exports, and described output connects electronic load by the passage relay of correspondence.
Described pick-up unit is also provided with as the power interface (220V) of its power supply and the three-phase supply interface (115V) for powering for power supply module.
Pick-up unit is also provided with three-phase alternating-current supply circuit of testing the phase sequence.Commercially available prod can be adopted to realize.
Described single-chip microcomputer is also connected with display circuit and input through keyboard circuit.
Be provided with detection interface between described pick-up unit and power supply module, detect interface and comprise connector and cable.Pick-up unit of the present invention mainly comprises single-chip microcomputer, electronic load and multicircuit switch, multicircuit switch is made up of code translator and one group of corresponding passage relay, whether the passage actuating of relay is made by Single-chip Controlling, realize the respective channel foundation of power supply module or the connection of cut-out and electronic load, thus achieve the multi-channel detection of the power supply module of robotization.
Further, code translator has also controlled a vacant passage, for being first switched to the vacant output in this road when passage bridge, then turning to the power supply that will switch to export, to ensure first to disconnect, then connecting.
Further, single-chip microcomputer and expanded circuit (comprising display) formation control thereof and display unit, not only complete the controlling functions of pick-up unit, and provide 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 115V, 400Hz power supply that three-phase alternating current phase sequence testing circuit outputs to tested power supply module by pick-up unit must ensure that phase sequence is correct and can not phase shortage, therefore needs to design corresponding Phase sequence detection and open-phase protection circuit.Under phase order of 3-phase AC mistake or phase shortage situation, Phase sequence detection and open-phase protection circuit work, three-phase alternating current can not be input in tested power supply module, avoids the infringement to tested power supply.
Further, between the present invention and power supply module, be provided with detection interface, adopt standardized connector and cable to realize multiple passage of power supply module and be connected with quick between the multiple detection port of the present invention.
Accompanying drawing explanation
Fig. 1 is composition frame chart of the present invention;
Fig. 2 is that the present invention is connected block diagram with power supply module;
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 concept block diagram of the embodiment of the present invention;
Fig. 6 is 4 × 4 keyboard scanning circuit figure of the embodiment of the present invention;
Fig. 7 is the embodiment of the present invention " timer 1 ", " timer 2 " key circuit figure;
Fig. 8 is the display interface circuit figure of the embodiment of the present invention;
Fig. 9 is code translator and relay drive circuit figure in the multicircuit switch circuit of the embodiment of the present invention;
Figure 10 is multicircuit switch repeat circuit and the electronic load connecting circuit figure of the embodiment of the present invention;
Figure 11 is single-chip microcomputer and the electronic load serial interface circuit figure of the embodiment of the present invention;
Figure 12 is hardware " house dog " and the reset circuit figure of the embodiment of the present invention;
Figure 13 is Phase sequence detection and the 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.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
Pick-up unit of the present invention mainly comprises single-chip microcomputer, electronic load and multicircuit switch, multicircuit switch is made up of code translator and one group of corresponding passage relay, whether the passage actuating of relay is made by Single-chip Controlling, realize the respective channel foundation of power supply module or the connection of cut-out and electronic load, thus achieve the multi-channel detection of the power supply module of robotization.
In embodiment as shown in Figure 1, 2, pick-up unit mainly comprises control and display unit, electronic load, multicircuit switch, power module, detection interface and three-phase alternating current phase sequence testing circuit.
Control and display unit, primarily of single-chip microcomputer and single-chip microcomputer extension circuit composition, mainly complete the controlling functions of pick-up unit, and provide man machine operation interface and display interface for user.
Electronic load, mainly as the fictitious load of tested power supply, constant load characteristic that it is adjustable can adapt to the different requirement exported.Electronic load also provides voltage and current to show.Unloaded and fully loaded switching can be realized by the state changing electronic load.
Multicircuit switch, this part is by monolithic processor controlled multiselect one on-off circuit, and object is to be switched to respectively on electronic load according to the control of man machine operation interface by the 13 tested power supplys in road, measures and display to complete;
Power module, this part provides the working power of+5V ,+27V, and+5V ,+27V power supply is also for detected power supply module simultaneously.
Detect interface, this part is the connecting interface that pick-up unit arrives between tested power supply module, comprises connector and cable.
Three-phase alternating current phase sequence testing circuit, three-phase alternating current 115V, 400Hz power supply outputting to tested power supply module by pick-up unit must ensure that phase sequence is correct and can not phase shortage, therefore needs to design corresponding Phase sequence detection and open-phase protection circuit.Under phase order of 3-phase AC mistake or phase shortage situation, Phase sequence detection and open-phase protection circuit work, three-phase alternating current can not be input in tested power supply module, avoids the infringement to tested power supply.
From outward appearance, in line with debugging object that is simple, facility compact, the pick-up unit of power supply module select prestige figure electronics to produce 19 " standard PC case; model is 3981160; 6U height; physical dimension is 483mm × 430mm × 256mm (long × wide × high), is provided with horizontal handle, and cabinet primary colours are 7035(stone ash).Its metal cabinet can provide basic EMC protection.In cabinet, left-half is for installing electronic load cabinet, and right half part installs printed board, the relay layout plate of Single-chip Controlling parts, and power module is installed in side.
Inside cable primarily of detection streamer socket to transit cable socket, detection streamer socket to interfaces such as front panel instrument connection, pilot lamp, buttons.
Front panel mainly installs button, pilot lamp, the device such as instrument connection, power switch.Rear panel places the devices such as cable socket, power input socket interface, RS232 communication interface.
As shown in Figure 3, rear panel design is illustrated in fig. 4 shown below front panel design.
The major function of the pick-up unit of power supply module is as follows:
A) for power supply module provides three-phase 115V(to connect laboratory 115V power supply, through debugger transfer), direct current+5V and direct current+27V power supply (laboratory 220V power supply is generated by power module);
B) three-phase 115V supply voltage, electric current and phase sequence and pile defection and Presentation Function is possessed; Three-phase 115V power supply is transferred to power supply module to be measured by pick-up unit, for power supply module to be measured provides input, exports to produce relevant voltage.
C) power supply module each road output voltage, electric current, ripple and product hour counter duty are detected;
D) power-on self-test brake is possessed.
Concrete testing process is as follows:
The pick-up unit of power supply module and power supply module by be connected Fig. 2 Suo Shi correct after, according to Fig. 3, the power switch on the pick-up unit front panel of power supply module is got to the position of connection, open electronic load power switch (electronic load power switch also can be placed in normally open), first 220V/50Hz AC power is connected, the power supply unit of pick-up unit is started working, produce+5V and+27V, light+5V and+27V pilot lamp, Phase sequence detection and open-phase protection circuit work simultaneously, to judge the 115V be connected with pick-up unit, whether 400Hz three-phase alternating current phase sequence correctly and not phase shortage, normal then power to rear class.Pick-up unit starts initialization and self-inspection work, single-chip microcomputer initiates communication to electronic load, after receiving correct response, single-chip microcomputer sets electronic load initial operation mode (fixed current mode, zero current), screening electron load input through keyboard, and control channel relay 14 and passage relay 15 switched with the 5s time interval, make electronic load show the measured value of+5V and+27V in turn, and judged by the serial ports corresponding measured value that reads back; Whether the state simultaneously detecting Phase sequence detection and open-phase protection circuit is normal.If above-mentioned state all meets normal requirement, " self-inspection is normal " pilot lamp is lighted.Now press " lamp test " button, all pilot lamp are lighted in scanning display, unclamp " lamp test " button, and all pilot lamp extinguish.Whether above step is normal for the pick-up unit of operator's observe and decide power supply module, if " self-inspection is normal " pilot lamp is lighted, can carry out next step operation, otherwise the pick-up unit of power supply module will forbid other operation except power-off, reset, lamp test automatically.
After self-inspection normally completes, Pen-down detection device " energising detects " button, this button indicating lamp is lighted, pick-up unit controls multicircuit switch and is switched to vacant output, pick-up unit exports electrical instruction to power supply module, pick-up unit enters test standby condition, and electronic load is in initial operation mode and electric current and voltage display is all zero.
Any one now in Pen-down detection device 13 power knobs to be measured, corresponding button indicating lamp is lighted, and pick-up unit controls multicircuit switch and is switched to respective channel, and supply voltage to be measured is added to electronic load input end, electronic load shows its magnitude of voltage, enters no load test; Press " unloaded/fully loaded " button again, fully loaded pilot lamp is lighted, and pick-up unit setting electronic load is the output-current rating value of this road power supply, and electronic load shows its voltage and current value, enters full load test.Now, press other road power supply test button, former tested power knob pilot lamp extinguishes, new tested power knob pilot lamp is lighted, and fully loaded pilot lamp extinguishes, and single-chip microcomputer setting electronic load enters initial operation mode, multicircuit switch is switched to vacant output, after certain time-delay (100ms), multicircuit switch is switched to new tested power channel, enters no load test.So can the complete all power supplys to be measured of repeated test.
" timer 1 " and " timer 2 " is locking button, pick-up unit is after " energising detects " button is pressed, corresponding steering order signal can be sent to power supply module, to control the duty of power supply module PT2 timer and PT3 timer according to the key-press status of " timer 1 " and " timer 2 ".
Press the Reset button, pick-up unit resets, and " energising detects " status releasing, pick-up unit sends powered-down instruction to power supply module, and pick-up unit recovers initialization and self-inspection 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 pick-up unit, drive corresponding pilot lamp (" power self test 1 ", " power self test 2 " and " power self test 3 "), for operator's observe and decide.
Single-chip computer control system designs: the control system core of the pick-up unit of power supply module is expanded by single-chip microcomputer P89V51 and designed; expanded circuit comprises the keyboard and display interface circuit of control and display unit; the serial interface circuit of electronic load; the digital quantity of tested power supply or switching value interface circuit; multicircuit switch interface circuit; hardware watchdog circuit, three-phase alternating-current supply Phase sequence detection and protection circuit etc.Theory diagram as shown in Figure 5.
According to the function that single-chip microcomputer realizes, as shown in table 1 for single-chip processor i/o mouth distribution condition.
Table 1 single-chip processor i/o mouth distribution condition complete list
| Sequence number | I/O | Effect |
| 1 | P0.0、P0.1、P0.2、P0.3 | Multicircuit switch exports |
| 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 buttons and timer 1,2 button light are every input |
| 5 | P1.0 | Three-phase 115V power phase detects and protection circuit input |
| 6 | P1.1 | Energising detects instruction and exports |
| 7 | P1.3、P1.4、P1.5 | Series display controls delivery outlet |
| 8 | P1.6 | Hummer controls to export |
| 9 | P1.7 | Hardware " house dog " circuit feed pulse export |
| 10 | P3.0、P3.1 | Asynchronous serial communication mouth |
| 11 | P3.2、P3.3、P3.4 | Power self test 1,2,3 flashlight is every input end |
Keyboard and display interface circuit design: in the manipulation button of the pick-up unit of power supply module, "+27V ", "+24V ", "-24V ", " adjustable 1 ", " adjustable 2 ", "+20V ", "-20V ", "+15V ", "-15V ", "+40V I ", "+40V II ", "+12V ", "+5V ", " energising detects ", " lamp test ", " unloaded/fully loaded " be totally 16 band button composition 4 × 4 keyboard scan circuit.Its circuit diagram as shown in Figure 6.The key circuit of " timer 1 ", " timer 2 " as shown in Figure 7.
Display interface circuit selects 3 6B595 shift registers to form serial-shift display circuit, drives "+27V ", "+24V ", "-24V ", " adjustable 1 ", " adjustable 2 ", "+20V ", "-20V ", "+15V ", "-15V ", "+40V I ", "+40V II ", "+12V ", "+5V ", " energising detects ", " lamp test ", " unloaded/fully loaded ", " self-inspection is normal ", " power self test 1 ", " power self test 2 ", " power self test 3 " pilot lamp.Its display interface circuit as shown in Figure 8."+5V " and "+27V " pilot lamp is exported by pick-up unit power supply unit and provides driving.Be connected on the positive-negative power two ends that power supply unit produces respectively.By tested power supply module provide " power self test 1 ", " power self test 2 ", " power self test 3 " signal after Phototube Coupling by Single-chip Controlling output display.
Multicircuit switch circuit design: the core component multicircuit switch of the pick-up unit of power supply module is expanded by single-chip microcomputer P89V51 and designed, adopt the input of 4 I/O mouths as 4-16 line code translator of P89V51, relay is driven to complete the switching of different electrical power to electronic load, to ensure unique gating of multicircuit switch by the output of code translator again.Code translator and relay drive circuit are as shown in Figure 9.When realizing different electrical power to the switching of electronic load, be first switched to the vacant output in this road, then turn to the power supply that will switch to export, to ensure first to disconnect, then connect.Consider the voltage loss that detection streamer brings when power supply module full load test, the deviation measuring displayed value can be caused, therefore adopt the far-end measuring function of electronic load (self-test function of tester) to avoid measured deviation.In power supply module, each road power supply is exported and all leave detection measuring junction, when using multicircuit switch that power output end to be measured is added to the input end of electronic load, utilize other contact of this switch passage relay simultaneously, power measurement end to be measured is added to the far-end measuring input end of electronic load.Therefore the type selecting of multicircuit switch repeat circuit adopts the JZX-16M relay of 4 transfer contacts, and wherein two groups of contacts are used for load measure, and another two groups of contacts are used for far-end voltage measurement.Add+the 5V that this tester produces and+27V two kinds of voltages by 13 road voltage signals to be measured, totally 15 road voltage signals access load measure end and the remote test end of electronic load respectively.Its detailed design circuit diagram as shown in Figure 10.
The serial interface circuit design of electronic load: in single-chip computer control system and electronic load communication process, adopts MAX232 as standard serial interface.Its circuit diagram as shown in figure 11.
Hardware watchdog circuit designs: in reset circuit of SCM, adopts hardware " house dog " circuit, improves the Stability and dependability of system.Its circuit diagram as shown in figure 12.
Three-phase alternating-current supply Phase sequence detection and protecting circuit designed: three-phase alternating current 115V, 400Hz power supply outputting to tested power supply module by power supply module checkout equipment must ensure phase sequence correctness and can not phase shortage; therefore need to design corresponding Phase sequence detection and open-phase protection circuit, physical circuit as shown in figure 13.This circuit can ensure under phase sequence mistake or phase shortage situation, is powered by automatically cutting off A.C. contactor by 54LS74D trigger and 54LS123 monostalbe trigger with disjunction three-phase supply to rear class.
Software for Design: the pick-up unit of power supply module adopts the P89V51 single-chip microcomputer of enhancement mode 51 kernel to design as CPU, adopts assembly language programming to improve code efficiency, is also convenient to the optimization of program structure.The program software of the pick-up unit of power supply module is divided into initialize routine, supervisory routine, keyboard scan and display routine, self-check program, Serial Communication Program, software watchdog program etc.The setting of original state after the main completion system of initialize routine powers on; Supervisory routine mainly completes tissue between each program element, coordination and despatching work; Keyboard scan and display routine are responsible for the process of man-machine interface; Self-check program completes the System self-test function of requirement; Serial Communication Program is responsible for communication to electronic load and control; Software watchdog program then monitors the running software of whole single-chip microcomputer, performs occur richochet, deadlock and entanglement to prevent program.Total program flow diagram as shown in figure 14.
More than provide a kind of concrete embodiment, but the present invention is not limited to described embodiment.Basic ideas of the present invention are such scheme, and for those of ordinary skill in the art, according to instruction of the present invention, designing the circuit of various distortion, structure, parameter does not need to spend creative work.The change carried out embodiment without departing from the principles and spirit of the present invention, amendment, replacement and modification still fall within the scope of protection of the present invention.
Claims (7)
1. the pick-up unit of a power supply module, it is characterized in that, comprise single-chip microcomputer, multicircuit switch and electronic load, described multicircuit switch is made up of code translator and one group of passage relay, described Single-chip Controlling connects described code translator, the output correspondence of code translator connects each passage relay, and passage relay is at least for the connection between the respective channel of power on/off source component and electronic load.
2. the pick-up unit of a kind of power supply module according to claim 1, is characterized in that, described passage relay is also for the connection between switching detection device power supply unit and electronic load.
3. the pick-up unit of a kind of power supply module according to claim 1, is characterized in that, described pick-up unit also comprises power module, and power module at least comprises a road and exports, and described output connects electronic load by the passage relay of correspondence.
4. the pick-up unit of a kind of power supply module according to claim 1, is characterized in that, described pick-up unit is also provided with as the power interface (220V) of its power supply and the three-phase supply interface (115V) for powering for power supply module.
5. the pick-up unit of a kind of power supply module according to claim 1, is characterized in that, pick-up unit is also provided with three-phase alternating-current supply circuit of testing the phase sequence.
6. the pick-up unit of a kind of power supply module according to claim 1, is characterized in that, described single-chip microcomputer is also connected with display circuit and input through keyboard circuit.
7. the pick-up unit of a kind of power supply module according to claim 1, is characterized in that, is provided with detection interface between described pick-up unit and power supply module, detects interface and comprises connector and cable.
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