CN103391147A - Method and device for transmitting signals of communication power supply - Google Patents
Method and device for transmitting signals of communication power supply Download PDFInfo
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- CN103391147A CN103391147A CN2012101469826A CN201210146982A CN103391147A CN 103391147 A CN103391147 A CN 103391147A CN 2012101469826 A CN2012101469826 A CN 2012101469826A CN 201210146982 A CN201210146982 A CN 201210146982A CN 103391147 A CN103391147 A CN 103391147A
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Abstract
The invention discloses a method and a device for transmitting signals of a communication power supply. The method comprises the steps that a first multiplexer receives a synchronous signal and a multi-channel detection signal of the communication power supply and receives a gating signal from an address input end; the first multiplexer transmits one of the synchronous signal and the multi-channel detection signal simultaneously according to the gating signal and transmits the synchronous signal and the multi-channel detection signal to a second multiplexer; the second multiplexer separates and outputs the synchronous signal and the multi-channel detection signal according to a gating signal of the second multiplexer. According to the method and the device, a time division multiplexing method is adopted, a few low-cost circuits are added, a few signal lines are used fro transmitting signals, so that connecting cables can be reduced greatly, signal interfaces can be simplified, and the transmission of the signals of the communication power supply can be achieved.
Description
Technical field
The present invention relates to the communication power supply technical field, relate in particular to a kind of transmission method and device of communication power supply semaphore.
Background technology
The miniaturization of communication power supply, from the discrete multi-frame to unified frame, to embedded power supply; On volume, the rack height from 2200mm to 2000mm, 1600mm; The degree of depth from 800mm to 600mm, 400mm.
Power model adopts the subrack mode mostly, and along with the development of technology, power density improves constantly, and the power model subrack is also more and more less, and the even less subrack of 1U*3U subrack (output can reach 3000W) constantly occurs at present.
Power supply supervision unit also adopts the subrack mode mostly, moves towards simultaneously and rapidly miniaturization, from the subrack of 19 ' standard subrack, 2U*3U until existing 1U*3U subrack.
can be consistent on monitoring unit subrack and power model subrack structure, but the monitoring unit space is more and more less, detection signal is more and more, support simultaneously to exchange as needs and detect, non intelligent rectification module information detects, many Battery packs information detects, the multi-channel DC load detecting, environment unit detection etc., numerous signals are generally by backboard or interface board access monitoring unit, signal conditioning circuit (digital circuit) can be realized miniaturization by integrated circuit, but signaling interface partly is difficult to miniaturization, exist the interface signal cable numerous, the connector volume is excessive, the type selecting difficulty, safeguard inconvenience, process structure designs complicated and reuses the problems such as rate is low.Same monitoring unit takies power model subrack space or distribution space, has reduced power density and the distribution space availability ratio of product, becomes the difficult problem that present communication power supply realizes that the demands such as miniaturization and front maintenance need to be resolved hurrily.
The general semaphore transmission method of power supply producer has three at present, and is as follows:
Method 1: with backboard and signal interface board (Signal Interface Board, abbreviation SIB) carry out the collection signal transmission, this mode has occupied the position (backboard is excessive) of a plurality of power model subracks on frame, increased simultaneously a SIB, backboard and SIB have introduced numerous collection signals;
The defect of this mode is:
1) take the groove position of power model more, caused power system capacity decline (the especially Embedded Application of power supply with small capacity);
2) SIB is connected numerously with the signal of backboard, and cable/winding displacement is complicated, easily breaks down, and locus is distributed with very large constraint (space length, direction);
3) the process structure design is complicated, and the rate of reusing is very low.
Method 2: realize the collection signal transmission with backboard, occupied distribution locus (backboard is excessive) on frame, by backboard, introduce numerous collection signals;
The defect of this mode is:
1) take the distribution space more, caused the distribution space availability ratio to descend;
2) the backboard size is very large, and is difficult in maintenance;
3) front wiring is convenient not as SIB.
Method 3: realize the collection signal transmission with backboard and SIB, the upper increase MCU/DSP of SIB unit, directly complete the collection of data on SIB,, by communication modes, give monitoring unit.This is also a kind of common practice of semaphore transmission.
The defect of this mode is: on the SIB veneer, software section is arranged, upgrading/safeguard that inconvenience, versatility also are difficult to guarantee.
At present, the collection signal of the monitoring unit of communication power supply is too much, and being difficult to convenient transmission is present problem demanding prompt solution.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of transmission method and device of communication power supply semaphore, can reduce connection cable in the situation that the collection capacity of power supply supervision unit is numerous, reduces the signaling interface complexity.
For solving the problems of the technologies described above, the transmission method of a kind of communication power supply semaphore of the present invention comprises:
The first multiplexer receives the multichannel detection signal of synchronizing signal and communication power supply, and from address input end, receives gating signal;
Described the first multiplexer, according to the gating signal synchronization described synchronizing signal of transmission and multichannel detection signal Zhong Deyi road signal, is transferred to the second multiplexer with described synchronizing signal and multichannel detection signal;
Described the second multiplexer separates the described synchronizing signal of output and multichannel detection signal according to the gating signal of self.
Further, adopt the oscillator flip-flop number to produce the gating signal of described the first multiplexer, wherein, the trigger rate f0 of described oscillator is greater than the highest frequency of multichannel detection signal and the product of 10 times of N, and described N is the way of the first multiplexer.
Further, also comprise:
After described the first multiplexer is transferred to the second multiplexer with described synchronizing signal and multichannel detection signal, adopt amplitude separator to take out described synchronizing signal, the frequency of the synchronizing signal of taking out is f0/N, adopt phase-locked loop that the frequency of described synchronizing signal is reduced to f0, adopt described synchronizing signal flip-flop number to produce the gating signal of described the second multiplexer.
Further, described synchronizing signal adopts d. c. voltage signal, and the amplitude of described multichannel detection signal is less than the amplitude of described d. c. voltage signal.
Further, when described multichannel detection signal was differential signal, described the first multiplexer and the second multiplexer adopted the binary channels multiplexer.
Further, when described multichannel detection signal is differential signal, described differential signal conditioning, for single-ended signal, is inputed to described the first multiplexer.
Further, a kind of device of realizing the transmission of communication power supply semaphore comprises: the first multiplexer and the second multiplexer, wherein:
Described the first multiplexer, be used for receiving the multichannel detection signal of synchronizing signal and communication power supply, and from address input end, receive gating signal, according to the gating signal synchronization described synchronizing signal of transmission and multichannel detection signal Zhong Deyi road signal, described synchronizing signal and multichannel detection signal are transferred to the second multiplexer;
Described the second multiplexer, be used for separating the described synchronizing signal of output and multichannel detection signal according to the gating signal of self.
Further, also comprise the counter that is connected with the address input end of described the first multiplexer, and the oscillator that is connected with this counter, wherein:
Described oscillator, be used for triggering described counter and produce the gating signal of described the first multiplexer, and wherein, the trigger rate f0 of described oscillator is greater than the highest frequency of multichannel detection signal and the product of 10 times of N, and described N is the way of the first multiplexer.
Further, also comprise amplitude separator, phase-locked loop and the counter that is connected with the address input end of described the second multiplexer, wherein:
Described amplitude separator, be used for taking out described synchronizing signal after described the first multiplexer is transferred to the second multiplexer with described synchronizing signal and multichannel detection signal, and the frequency of the synchronizing signal of taking-up is f0/N;
Described phase-locked loop, be used for the frequency of described synchronizing signal is reduced to f0, adopts described synchronizing signal to trigger the counter that is connected with the address input end of described the second multiplexer, produces the gating signal of described the second multiplexer.
Further, described synchronizing signal adopts d. c. voltage signal, and the amplitude of described multichannel detection signal is less than the amplitude of described d. c. voltage signal.
In sum, we are bright by time-multiplexed method, by increasing a small amount of low-cost circuit, utilize a small amount of holding wire signal transmission, can greatly reduce connection cable, simplify signaling interface, realize the transmission of communication power supply semaphore, in the present invention, the synchronizing clock signals of using in time division multiplexing, transmit by frequency reducing and signal transmission timesharing, take full advantage of transmission cable and the effectively interference of minimizing to synchronised clock; Not losing in characteristics of signals (comprising synchronised clock) transmission, is the key that realizes the time multiplexing signal transmission success.
Description of drawings
Fig. 1 is the schematic diagram of transmitting device of the communication power supply semaphore of present embodiment;
Fig. 2 is the schematic diagram that the signal of the monitoring unit of present embodiment transmits;
Fig. 3 is the time-multiplexed schematic diagram of realizing single-ended input of present embodiment;
Fig. 4 is the time-multiplexed schematic diagram of realizing the difference input of present embodiment;
Fig. 5 is the time-multiplexed schematic diagram of realizing Single-end output of present embodiment.
Embodiment
Present embodiment is the monitoring unit to communication power supply,, by time-multiplexed method,, by increasing a small amount of low-cost circuit, utilizes several holding wire signal transmissions, can greatly reduce connection cable, simplifies signaling interface, realizes the transmission of semaphore.
In present embodiment, the synchronizing signal that time division multiplexing is used, transmit by frequency reducing and signal transmission timesharing, takes full advantage of transmission cable and the effectively interference of minimizing to synchronizing signal; Not losing in characteristics of signals (comprising synchronizing signal) transmission, is the key that realizes the time multiplexing signal transmission success.
Below describe the step that realizes in detail.
In present embodiment,, by time-multiplexed mode, carry out the transmission of collection signal, to reduce connection cable, interface signal also can be simplified greatly.
Specifically comprise the steps:
(1) multiplexer (analog multiplexer) is set in transmitting terminal and receiving terminal inside and realizes that respectively multiplexing separates with signal, to realize the purpose of a plurality of collection signal common transmission line;
As shown in Figure 1, transmission at the transmitting terminal multiple signals utilizes oscillator to trigger analog multiplexer gating multiplexer channel Zhong Deyi road, realize the timesharing transmission of multiple signals, adopt same frequency to trigger analog multiplexer at receiving terminal and realize the separation of signal, like this, the quantity of signal transmission cable will greatly be reduced.
(2) be the reduction collection signal, need to adopt a-road-through road synchronous signal transmission.
As shown in Figure 1, synchronizing signal generally takies first passage of analog multiplexer, and the collection signal on same analog multiplexer all must not disturb synchronizing signal.As adopt N road analog multiplexer to realize that multiplexing separates with signal, the transmission trigger rate is f0, synchronizing signal adopts d. c. voltage signal VDD, take first input of analog multiplexer, as long as the collection signal amplitude on same analog multiplexer is all less than VDD, utilize amplitude separator (voltage comparator) can take out synchronizing signal VDD at receiving terminal, its frequency f t=f0/N.Ft, through phase-locked loop (PLL), being reduced into f0,, as the trigger rate of receiving terminal analog multiplexer, makes receiving terminal and transmitting terminal keep strictly synchronizeing.
, if signal transmission is differential signal, can select the binary channels multiplexer, to evade the interchannel otherness of single channel multiplexer.Can in advance differential signal be nursed one's health into single-ended signal, so just need not to adopt the binary channels multiplexer to carry out multiplexing, can reduce the quantity of analog multiplexer and the quantity of transmission cable, reduce costs.
, if original collection signal is the signal that current signal or amplitude exceed synchronizing signal, needs first to nurse one's health into the signal lower than synchronizing voltage, then transmit.
This method is applicable equally to output signal, just by monitoring unit, completes multiplexing, and the SIB settling signal separates.After signaling interface was simplified greatly, the required power line of SIB needed to keep, to meet circuit requirements.
Below the selection of the trigger rate of signal transmission described, comprising:
In communication power supply, general analog acquisition signal mainly contains voltage signal, current signal and frequency signal, and major part is all low frequency signal.Therefore,, as long as convert current signal to voltage signal, adopt multiplexer and PLL to transmit by smooth settling signal, cost is very cheap.
For example, multi-channel analog change over switch transmission N road analog acquisition signal (containing synchronizing signal), when trigger rate was f0, the sample frequency of N road analog acquisition signal was f0/N, therefore, the signal frequency of each analog acquisition signal is the highest can be f0/10N.In the communication power supply field, general signal frequency is all low frequency signal, selects rational f0, just can realize the signal transmission.
Be described in further detail below in conjunction with the enforcement of accompanying drawing to technical scheme.
Suppose that a kind of power-supply system is comprised of AC distribution, DC distribution, maximum 5 power models and a monitoring unit, the signal of required detection has alternating voltage to become the number of delivering letters (d. c. voltage signal) 1 tunnel, dc load voltage 1 tunnel (all has been converted to d. c. voltage signal, 0～4.5V), battery current (differential input signal, common-mode voltage is no more than 4.5V) 2 tunnels, rectifier current output frequency signal 5 tunnels (amplitude 0～4.5V, maximum 5kHz), rectifier switch machine control signal 5 tunnels (level 0V or 4.5V).
As shown in Figure 2, monitoring unit comprises: monitoring unit subrack, backboard and SIB, the signal of required detection is inputted by SIB, SIB by backboard with the communication of required detection to the monitoring unit subrack.
As shown in Figure 3, multiplexer can adopt CD4051/CC4051, CD4051/CC4051 is single channel 8 railway digital control simulation electronic switches, three binary system control input end C1, C2, C3 and INH input (or ENB input) are arranged, have low conduction impedance and very low cut-off leakage current.Amplitude is that the digital signal of 4.5～20V can be controlled the analog signal of peak value to 20V.If VDD=+5V, VSS=0, VEE=-13.5V, the digital signal of 0～5V can be controlled-analog signal of 13.5～4.5V.These switching circuits have extremely low quiescent dissipation in whole VDD～VSS and VDD～VEE power range, irrelevant with the logic state of control signal.When INH input=" 1 ", all passage cut-offs; When INH input=" 0 ", (the Zhong Deyi road of I/O0～I/O7), realize the transmission (inputing or outputing) of signal on triad address signal (C1, C2, C3) gating 8 tunnels.
Become the number of delivering letters, dc load voltage and rectifier current output frequency signal for the alternating voltage in the signal of required detection and adopt the transmission of single channel multiplexer, as shown in Figure 3, comprising:
1) signal distributes: CD4051 needs 2 and is separately positioned on SIB and monitoring unit, and the use of separating with signal as multiplexing, to realize maximum 7 collection signals of transmission on a transmission line.
S1～S8 is the I/O end of 8 road analog multiplexers, is input during as multiplexing, is output while doing the signal separation.D is common port, is output during signal transmission, becomes input during separation signal.Signal is allocated as follows:
S0 is synchronous voltage signal VDD;
S1～S7 is respectively alternating voltage and becomes the number of delivering letters Ua, dc load voltage Udc, rectifier current output frequency signal Ismr1～Ismr5.
2) chip application: VDD=+5V, VSS=0, VEE=0V (VSS and VEE are the common definition that the chip power taking is described, and be not shown), INH input end grounding.Select the address input end of 3 digit counters as analog multiplexer, by RC oscillator flip-flop number, produce gating signal, realize that the timesharing transmission of collection signal and signal separate.
3) signal transmission trigger rate: following formula is arranged as can be known by transmission principle:
F0/10N＞signal transmission highest frequency, f0 are the signal trigger rate, and N is the way of analog multiplexer.Because the signal transmission highest frequency is 5kHz, CD4051 is 8 road analog multiplexers, and by formula: f0＞5kHz*8*10=400kHz, f0 is chosen as 1MHz.
4) first input transmitting synchronous voltage VDD of synchronization principles: CD4051, as the synchronizing signal of receiving terminal.As long as the collection signal amplitude, all less than VDD, utilizes amplitude separator (voltage comparator) can take out synchronizing signal VDD at receiving terminal, its frequency f t=f0/8.Ft, through phase-locked loop (PLL) 8 frequency multipliers, being reduced into f0,, as the clock frequency of receiving terminal counter, makes the strict maintenance of receiving system and dispensing device synchronize.
The transmission cable of the collection signal between SIB and monitoring unit will be reduced to 1 by original 7 like this.
For the transmission of differential input signal, CD4052 and CD40151 chip characteristics are similar, are binary channels multi-channel analog change over switch,, as accompanying drawing 4, comprising:
1) signal distributes: CD4052 needs two, is separately positioned on SIB and monitoring unit, and CD4052 is the analog multiplexer of 4 road differential signals, and the use of separating with signal as multiplexing, to realize maximum 3 collection signals of transmission on two difference transmission lines.S1x/y～S4x/y is 4 tunnel I/O ends, is input during as multiplexing, is output while as signal, separating.X, y are common port, are output during signal transmission, are input during separation signal.Signal is allocated as follows:
S1x/y transmitting synchronous voltage, be VDD and VSS;
S2x/y, S3x/y transmit respectively battery current 1 and battery current 2.
2) chip application: VDD=+5V, VSS=0, VEE=0V, INH input end grounding.Select the address input end of 2 digit counters as analog multiplexer, by RC oscillator flip-flop number, produce gating signal, realize that the timesharing transmission of collection signal and signal separate.
3) signal transmission trigger rate: following formula is arranged as can be known by transmission principle:
F0/10N＞signal transmission highest frequency, f0 are the signal trigger rate, and N is the way of analog multiplexer.Because the signal transmission highest frequency is 5kHz, CD4051 is 4 road analog multiplexers, and by formula: f0＞5kHz*4*10=200kHz, f0 is chosen as 1MHz.
4) first input transmitting synchronous voltage VDD and the VSS of synchronization principles: CD4052, as the synchronizing signal of receiving terminal.As long as the differential signal amplitude, all less than VDD, utilizes amplitude separator (voltage comparator) can take out synchronizing signal VDD at receiving terminal, its frequency f t=f0/4.Ft, through phase-locked loop (PLL) 4 frequency multipliers, being reduced into f0,, as the clock frequency of receiving terminal counter, makes receiving terminal and transmitting terminal keep strictly synchronizeing.
The transmission cable of the collection signal between SIB and monitoring unit, will be reduced to by original 42 transmission lines like this.
, if differential signal is nursed one's health into single-ended signal, adopt CD4051 only to need 1 transmission cable.
For the transmission of rectifier switch machine control signal, as shown in Figure 5, monitoring unit is as transmitting terminal, and SIB is as receiving terminal.
1) signal distributes: CD4051 needs 2, and a slice CD4051 is set respectively on monitoring unit and SIB, and the use of separating with signal as multiplexing, to realize maximum 7 collection signals of transmission on a transmission line.S1～S8 is the I/O end of 8 road analog multiplexers, is input during as multiplexing, is output while as signal, separating.D is common port, is output during signal transmission, becomes input during separation signal.Signal is allocated as follows:
S1 is transmitting synchronous voltage VDD;
S2～S6 is respectively rectifier switch machine control signal Osmr1～Osmr5.
2) chip application: VDD=+5V, VSS=0, VEE=0V, INH input end grounding.Select the address input end of 3 digit counters as analog multiplexer, by RC oscillator flip-flop number, produce gating signal, realize that the timesharing transmission of collection signal and signal separate.
3) signal transmission trigger rate: following formula is arranged as can be known by transmission principle:
F0/10N＞signal transmission highest frequency, f0 are the signal trigger rate, and N is the way of analog multiplexer.Because the signal transmission highest frequency is 5kHz, CD4051 is 8 road analog multiplexers, and by formula: f0＞5kHz*8*10=400kHz, f0 is chosen as 1MHz.
4) first input transmitting synchronous voltage VDD of synchronization principles: CD4051, as the synchronizing signal of receiving system.As long as the collection capacity signal amplitude, all less than VDD, utilizes amplitude separator (voltage comparator) can take out synchronizing signal VDD at receiving terminal, its frequency f t=f0/8.Ft passes through phase-locked loop (PLL) 8 frequency multipliers again and is reduced into f0,, as the clock frequency of the counter of receiving terminal, makes receiving terminal and transmitting terminal keep strictly synchronizeing.
The output signal line of monitoring unit, will be reduced to 1 by original 5 like this.
For realizing above function, SIB needs VDD (5V+) and VSS (5V-) equisignal line to realize power delivery at least.
Can see by the present embodiment, the cable of signal transmission (input, the output signal that comprise monitoring unit) can be reduced to 4 greatly by original 16, the interface signal of monitoring unit and backboard, backboard and SIB plate is all simplified greatly, realized very simply and easily the signal transmission, effect is very obvious.
In communication power supply, general analog acquisition signal mainly contains voltage, electric current and frequency signal, and the digital collection signal mainly contains DC loop state, cell circuit state etc., and output signal is output status signal a bit, and major part is all low frequency signal.Therefore, present embodiment is not only applicable to the analog quantity transmission, be applicable to too digital quantity input and controlled quentity controlled variable output, as long as signal transmission can be nursed one's health into the signal of the voltage that meets synchronous transmission, in the synchronizing voltage amplitude, adopt multiplexer (as CD4051) and PLL (as CD4046) to complete smoothly signal transmission multiplexed, reduce signaling interface, cost is also very cheap.For example, employing CD4051 transmission 8 tunnel analog signals (containing synchronizing signal) in upper example, when CD4051 is applied in the frequency (being that RC oscillator f0 is 1MHz) of 1MHz, the sample frequency of 8 tunnel analog signals is 125KHz, therefore, the signal frequency of each analog signal is the highest can be 12.5KHz.In the communication power supply field, general signal frequency can be well below this frequency.
More the collection signal of multichannel need to be multiplexing if having, and can also select other multiplexer, as CD4067 (16 road analog multiplexer), ADG731/732 (32 road analog multiplexer) or employing multi-disc CD4051, also can., for differential signal, can select binary channels multi-channel analog change over switch, to avoid the otherness of each passage of single channel analog multiplexer.As above example, can select binary channels 4 road analog multiplexer CD4052/CD4066 etc.Also differential signal first can be nursed one's health into single-ended signal, carry out when multiplexing like this, can reduce the quantity of the quantity/transmission line of analog multiplexer, reduce costs.
Above case explanation, adopt this method can reduce spliced cable, simplifies interface signal, realizes the transmission of collection capacity, thereby realize the difficult problem of communication power supply semaphore transmission, enhances product performance simultaneously, and will greatly reduce the workload of product maintenance.
Claims (10)
1. the transmission method of a communication power supply semaphore, is characterized in that, comprising:
The first multiplexer receives the multichannel detection signal of synchronizing signal and communication power supply, and from address input end, receives gating signal;
Described the first multiplexer, according to the gating signal synchronization described synchronizing signal of transmission and multichannel detection signal Zhong Deyi road signal, is transferred to the second multiplexer with described synchronizing signal and multichannel detection signal;
Described the second multiplexer separates the described synchronizing signal of output and multichannel detection signal according to the gating signal of self.
2. the method for claim 1 is characterized in that:
Adopt the oscillator flip-flop number to produce the gating signal of described the first multiplexer, wherein, the trigger rate f0 of described oscillator is greater than the highest frequency of multichannel detection signal and the product of 10 times of N, and described N is the way of the first multiplexer.
3. method as claimed in claim 2, is characterized in that, also comprises:
After described the first multiplexer is transferred to the second multiplexer with described synchronizing signal and multichannel detection signal, adopt amplitude separator to take out described synchronizing signal, the frequency of the synchronizing signal of taking out is f0/N, adopt phase-locked loop that the frequency of described synchronizing signal is reduced to f0, adopt described synchronizing signal flip-flop number to produce the gating signal of described the second multiplexer.
4. the method for claim 1, is characterized in that, described synchronizing signal adopts d. c. voltage signal, and the amplitude of described multichannel detection signal is less than the amplitude of described d. c. voltage signal.
5. the method for claim 1, is characterized in that, when described multichannel detection signal was differential signal, described the first multiplexer and the second multiplexer adopted the binary channels multiplexer.
6. the method for claim 1, is characterized in that, when described multichannel detection signal is differential signal, described differential signal conditioning, for single-ended signal, inputed to described the first multiplexer.
7. a device of realizing the transmission of communication power supply semaphore, is characterized in that, comprising: the first multiplexer and the second multiplexer, wherein:
Described the first multiplexer, be used for receiving the multichannel detection signal of synchronizing signal and communication power supply, and from address input end, receive gating signal, according to the gating signal synchronization described synchronizing signal of transmission and multichannel detection signal Zhong Deyi road signal, described synchronizing signal and multichannel detection signal are transferred to the second multiplexer;
Described the second multiplexer, be used for separating the described synchronizing signal of output and multichannel detection signal according to the gating signal of self.
8. device as claimed in claim 7, is characterized in that, also comprises the counter that is connected with the address input end of described the first multiplexer, and the oscillator that is connected with this counter, wherein:
Described oscillator, be used for triggering described counter and produce the gating signal of described the first multiplexer, and wherein, the trigger rate f0 of described oscillator is greater than the highest frequency of multichannel detection signal and the product of 10 times of N, and described N is the way of the first multiplexer.
9. device as claimed in claim 8, is characterized in that, also comprises amplitude separator, phase-locked loop and the counter that is connected with the address input end of described the second multiplexer, wherein:
Described amplitude separator, be used for taking out described synchronizing signal after described the first multiplexer is transferred to the second multiplexer with described synchronizing signal and multichannel detection signal, and the frequency of the synchronizing signal of taking-up is f0/N;
Described phase-locked loop, be used for the frequency of described synchronizing signal is reduced to f0, adopts described synchronizing signal to trigger the counter that is connected with the address input end of described the second multiplexer, produces the gating signal of described the second multiplexer.
10. device as claimed in claim 7, is characterized in that, described synchronizing signal adopts d. c. voltage signal, and the amplitude of described multichannel detection signal is less than the amplitude of described d. c. voltage signal.
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| CN107913083A (en) * | 2016-10-06 | 2018-04-17 | 通用电气公司 | System and method for ultrasound multiplexing |
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| CN101551990A (en) * | 2008-04-02 | 2009-10-07 | 东部高科股份有限公司 | A data receiving device |
| CN101867452A (en) * | 2010-06-10 | 2010-10-20 | 国网电力科学研究院 | Communication method of serial real-time bus special in electricity |
| CN102065254A (en) * | 2009-11-17 | 2011-05-18 | 无锡华润矽科微电子有限公司 | Multichannel signal acquisition and conversion method and circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101551990A (en) * | 2008-04-02 | 2009-10-07 | 东部高科股份有限公司 | A data receiving device |
| CN102065254A (en) * | 2009-11-17 | 2011-05-18 | 无锡华润矽科微电子有限公司 | Multichannel signal acquisition and conversion method and circuit |
| CN101867452A (en) * | 2010-06-10 | 2010-10-20 | 国网电力科学研究院 | Communication method of serial real-time bus special in electricity |
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| CN107913083A (en) * | 2016-10-06 | 2018-04-17 | 通用电气公司 | System and method for ultrasound multiplexing |
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