CN104820153A - Multi-machine system and synchronization measuring method thereof - Google Patents
Multi-machine system and synchronization measuring method thereof Download PDFInfo
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- CN104820153A CN104820153A CN201510264059.6A CN201510264059A CN104820153A CN 104820153 A CN104820153 A CN 104820153A CN 201510264059 A CN201510264059 A CN 201510264059A CN 104820153 A CN104820153 A CN 104820153A
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Abstract
The invention relates to the field of programmable electronic equipment and discloses a multi-machine system comprising at least two electronic devices, wherein one electronic device is configured to be a master machine and the rest electronic devices are configured to be slave machines. Each electronic device comprises an AD sampling unit and a control unit connected with the AD sampling unit, wherein the control unit has a sampling synchronization signal port. The sampling synchronization signal port of the master machine control unit is connected to the sampling synchronization signal port of the slave machine control unit; the sampling synchronization signal port of the master machine control unit is configured to serve as an output port; and the sampling synchronization signal port of the slave machine control unit is configured to serve as an input port. According to the multi-machine system, by carrying out master/slave mode configuration on the plurality of electronic devices forming the system, and by utilizing same-frequency AD read clock signal and chip selection signal between the master and slave machines, synchronous reading of the AD data by the master and slave machines is realized, synchronous measurement of the plurality of machines is realized, hardware connection is simple, and applicability is high.
Description
Technical field
The present invention relates to programmable electronic equipment field, be specifically related to a kind of multi-computer system be made up of multiple electronic equipment, be applied between polyelectron equipment and measure simultaneous techniques.
Background technology
The multi-computer system be made up of testing apparatuss such as multiple electronic equipment such as AC power, direct supply and electronic loads is more and more subject to the demand in market, multicomputer becomes series-parallel system to adapt to the demand of large power multifunctional, carrying out in test process to product to be measured, relating to the measurement stationary problem in test macro between many testing apparatuss.
For the multi-computer system of AC power composition, AC power is widely used in the various aspects such as scientific research, economic construction, military installations, Medical Instruments and people's lives, be the basis of electronics and electromechanical equipment, it provides high-quality electric energy for all consumers and device.
AC power has respective sampling unit, for the ease of three single phase alternating current power supplies are formed three-phase alternating-current supplies, also a three-phase alternating-current supply can be split into three single phase alternating current power supplies to use simultaneously, solve the synchronism problem shown between phase and phase, ensure that sampling unit is measured simultaneously, just seem particularly important.The implication representative amount brake of " table ", table synchronously refers to and measures synchronously.
Summary of the invention
The object of the invention is to measure simultaneous techniques for multi-computer system provides a kind of, solve the measurement stationary problem of each electronic equipment of multi-computer system, ensure the synchronism that each power-supply device measures.
In order to solve the problems of the technologies described above, the present invention is realized by following technical scheme:
A kind of multi-computer system, comprise at least two electronic equipments, one of them electronic configurations is main frame, and all the other electronic configurations are from machine; Described electronic equipment comprises AD sampling unit and connected control module, described control module has sampling synchronization signals port, the sampling synchronization signals port of master machine control unit is connected to the sampling synchronization signals port from machine control module, the sampling synchronization signals port arrangement of master machine control unit, for exporting, is input from the sampling synchronization signals port arrangement of machine control module.
The synchronous measure method of above-mentioned multi-computer system is, when the AD conversion unit output data of master machine control unit buffer memory reach setting quantitative value, sends sampling synchronization signals to from machine, resets buffer memory counter simultaneously, read data and carry out alternating-current parameter calculating; After receiving sampling synchronization signals from machine control module, the AD conversion unit reading buffer memory respectively exports data, resets buffer memory counter simultaneously, carries out alternating-current parameter calculating to the data read.
A kind of multi-computer system, comprise at least two electronic equipments, one of them electronic configurations is main frame, and all the other electronic configurations are from machine; Described electronic equipment comprises AD sampling unit and connected control module, reads that AD conversion unit exports the clock signal of data, chip selection signal reads from master machine control unit clock signal, the chip selection signal that AD conversion unit exports data from machine control module.
The synchronous measure method of above-mentioned multi-computer system is, when the AD conversion unit output data of host and slave processors control module buffer memory reach setting quantitative value, resets buffer memory counter, reads data and carry out alternating-current parameter calculating.
Multi-computer system of the present invention is by carrying out master slave mode configuration to its multiple electronic equipments of composition, between host and slave processors, adopt the AD of same frequency to read clock signal and chip selection signal, achieve the synchronous reading of host and slave processors to AD data, the measurement achieving multimachine is synchronous, signal wiring is simple, and applicability is strong.
Accompanying drawing explanation
Fig. 1 is the three-phase alternating-current supply connection diagram of embodiment one;
Fig. 2 is the three-phase alternating-current supply connection diagram of embodiment two;
Fig. 3 is embodiment one single-phase alternating current source structure and connection diagram;
Fig. 4 is embodiment two single-phase alternating current source structure and connection diagram
Fig. 5 is the host software process flow diagram of embodiment one;
Fig. 6 be embodiment one from machine software flow pattern;
Fig. 7 is the host and slave processors software flow pattern of embodiment two.
Embodiment
Below in conjunction with the drawings and specific embodiments, technical solution of the present invention is described in detail.
Embodiment one
As shown in Figure 1, the three-phase alternating-current supply of the present embodiment is made up of the single phase alternating current power supply that three contain control module, and wherein a phase (such as A phase) power configuration is main frame, and another two-phase (such as B, C phase) power configuration is from machine.The control module of single phase alternating current power supply has sampling synchronization signals port, the sampling synchronization signals port of master machine control unit is connected to respectively from the sampling synchronization signals port of machine control module, the sampling synchronization signals port arrangement of master machine control unit, for exporting, is input from the sampling synchronization signals port arrangement of machine control module.
During work, main frame is set, identical from the clock signal frequency of machine control module reading AD conversion unit output data, chip selection signal frequency is identical.But due to may the situations such as frequency drift be there is, in real work, can not ensure between host and slave processors that clock signal, chip selection signal frequency and phase place are completely the same, cannot ensure that unitary sampling simultaneously, can guarantee that the time cumulative sum of multiple repairing weld is equal, so the program is applicable to general precision occasion by main frame to sending sampling synchronization signals from machine.
Be illustrated in figure 3 the structural drawing of single phase alternating current power supply in the present embodiment, comprise AC-DC conversion module, power amplifier module, voltage sampling unit, current sampling unit, AD conversion unit, control module, error amplifying unit.Civil power is converted to direct current and inputs as the direct supply of power amplifier module by AC-DC conversion module, and power amplifier module exports after carrying out power amplification to input signal.Voltage sampling unit, current acquisition unit gather voltage, the electric current of power amplifier module output terminal respectively, export after converting digital signal to by AD conversion module, control module reads the instantaneous value of output data as output voltage, output current of AD conversion module, the various alternating-current parameters such as calculating voltage effective value, current effective value, active power, reactive power, applied power, power factor.Voltage sample result also gives error amplifying circuit, as the feedback signal that power supply exports, after compared with the waveform reference arranged, and output error amplifying signal driving power amplification module.Control module has sampling synchronization signals port, can be configured to and inputs or outputs port, and the sampling synchronization signals port of each machine control module is connected by DB25 connector.
Host and slave processors software flow pattern as shown in Figure 5, Figure 6, when the AD conversion unit output data of master machine control unit buffer memory reach setting quantitative value Na, send sampling synchronization signals to all the other from machine, reset buffer memory counter simultaneously, read data and carry out alternating-current parameter calculating.After receiving sampling synchronization signals from machine control module, the Nb(b phase of buffer memory before reading respectively), Nc(C phase) individual AD conversion unit exports data, reset buffer memory counter simultaneously, alternating-current parameter calculating carried out to the data read.In theory, Na, Nb, Nc should be equal, but may there is frequency drift problem due to previously mentioned, and three may be unequal.
Embodiment two
As shown in Figure 2, the three-phase alternating-current supply of the present embodiment and embodiment one similar, the single phase alternating current power supply containing control module by three forms, and wherein a phase (such as A phase) power configuration is main frame, and another two-phase (such as B, C phase) power configuration is from machine.Read from master machine control unit clock signal, the chip selection signal that AD conversion unit exports data unlike the clock signal, the chip selection signal that read AD conversion unit output data from machine control module, namely main frame reads clock line and AD reading chip select line (being connected by DB25 connector) with from the shared AD of machine, do not need extra sampling synchronization signals, can ensure that sampling clock between host and slave processors, chip selection signal frequency and phase place are completely the same like this, ensure that unitary sampling simultaneously, the program is applicable to high precision occasion.
Be illustrated in figure 4 the structural drawing of single phase alternating current power supply in the present embodiment, basic structure is identical with single phase alternating current power supply in embodiment one, be not both control module without the need to configuring sampling synchronization signals port, chip selection signal, the clock signal of each machine control module reading AD conversion unit output data are connected by DB25 connector.
Host and slave processors software flow pattern as shown in Figure 7, reads chip select line and clock line because sharing AD, and host and slave processors sampling flow process is consistent.When the AD conversion unit output data of host and slave processors control module buffer memory reach setting quantitative value, reset buffer memory counter, read data and carry out alternating-current parameter calculating.
Above-described embodiment is only described for the synchronous method of the power-supply system be made up of single phase alternating current power supply to multi-computer system, the present invention is not limited to AC power, those skilled in the art's easy understand, this multi-computer system and measurement synchronous method thereof are equally applicable to other electronic apparatus system having AD sampling and measure, electronic equipment can be multiple electronic surveying testing apparatus, such as electronic load, power meter, direct supply etc.
Claims (6)
1. a multi-computer system, comprises at least two electronic equipments, it is characterized in that: one of them electronic configurations is main frame, and all the other electronic configurations are from machine; Described electronic equipment comprises AD sampling unit and connected control module, described control module has sampling synchronization signals port, the sampling synchronization signals port of master machine control unit is connected to the sampling synchronization signals port from machine control module, the sampling synchronization signals port arrangement of master machine control unit, for exporting, is input from the sampling synchronization signals port arrangement of machine control module.
2. multi-computer system as claimed in claim 1, is characterized in that described main frame, identical from the clock signal frequency of machine control module reading AD conversion unit output data, chip selection signal frequency is identical.
3. the synchronous measure method of multi-computer system as claimed in claim 1 or 2, it is characterized in that when the AD conversion unit output data of master machine control unit buffer memory reach setting quantitative value, send sampling synchronization signals to from machine, reset buffer memory counter simultaneously, read data and carry out alternating-current parameter calculating; After receiving sampling synchronization signals from machine control module, the AD conversion unit reading buffer memory respectively exports data, resets buffer memory counter simultaneously, carries out alternating-current parameter calculating to the data read.
4. a multi-computer system, comprises at least two electronic equipments, it is characterized in that: one of them electronic configurations is main frame, and all the other electronic configurations are from machine; Described electronic equipment comprises AD sampling unit and connected control module, reads that AD conversion unit exports the clock signal of data, chip selection signal reads from master machine control unit clock signal, the chip selection signal that AD conversion unit exports data from machine control module.
5. the synchronous measure method of multi-computer system as claimed in claim 4, it is characterized in that when the AD conversion unit that host and slave processors control module reads export data reach setting quantitative value time, reset buffer memory counter, alternating-current parameter calculating carried out to the data read.
6. the multi-computer system as described in claim 1 or 4, is characterized in that: described electronic equipment is single phase alternating current power supply.
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| CN107817393A (en) * | 2016-09-13 | 2018-03-20 | 艾德克斯电子（南京）有限公司 | Electronic load combining system and method |
| CN109889211A (en) * | 2018-12-24 | 2019-06-14 | 中国电子科技集团公司第二十研究所 | A kind of multi-channel radio frequency applied to phased-array radar is directly adopted and generation circuit |
| CN110739709A (en) * | 2019-11-06 | 2020-01-31 | 湖南微网能源技术有限公司 | multi-machine control synchronization method |
| CN111157784A (en) * | 2019-12-31 | 2020-05-15 | 浙江华云信息科技有限公司 | Multi-loop electric measurement synchronous sampling device and sampling method thereof |
| CN111966012A (en) * | 2020-08-11 | 2020-11-20 | 大连大学 | Multichannel synchronous low-frequency vibration data acquisition device |
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