CN103701436A - External synchronous trigger signal generating method and equipment - Google Patents
External synchronous trigger signal generating method and equipment Download PDFInfo
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- CN103701436A CN103701436A CN201210370267.0A CN201210370267A CN103701436A CN 103701436 A CN103701436 A CN 103701436A CN 201210370267 A CN201210370267 A CN 201210370267A CN 103701436 A CN103701436 A CN 103701436A
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Abstract
The invention discloses an external synchronous trigger signal generating method and equipment. The external synchronous trigger signal generating equipment comprises a trigger signal generating module used for generating a periodic square signal and using the periodic square signal as a generated external synchronous trigger signal, and a trigger signal regulating module used for regulating the starting time of the edge of the periodic square signal generated by the trigger signal generating module, using the regulated periodic square signal as the external synchronous trigger signal and outputting the regulated periodic square signal. By adopting the technical scheme of the invention, the time delay of the extracted initial external synchronous trigger signal is regulated according to the characteristics of the external synchronous trigger signal required by an externally connected circuit, and the problem that because the time delay of the external synchronous trigger signal cannot be regulated, the generated external synchronous trigger signal and the trigger signal required by the externally connected circuit are not consistent, and the problem that the synchronous effect is not good in the prior art are solved.
Description
Technical field
The present invention relates to signal controlling technical field, relate in particular to a kind of generation method and generation equipment of outer synchronous triggering signal.
Background technology
At present; in electronics safety-security area; while utilizing the watch-dogs such as video camera to carry out the shooting of the images such as video, owing to being subject to the impact of civil power, the region that is taken often can exist the light sources such as light, display with the bright phenomenon changing of civil power cyclic variation generating period.Simultaneously, because the interval between the every frame of the captured video of the watch-dogs such as video camera is produced by internal clocking, and the cycle of civil power also can change because of the difference of load, make interval between the every frame of the captured video of the watch-dogs such as video camera often with adopt cycle of light source of alternating current asynchronous, cause occurring flickering light emitting source or subject reducing picture display effect in video.
In order to solve the nonsynchronous problem of the watch-dogs such as above-mentioned video camera and civil power, make the watch-dogs such as video camera can be applied in the monitoring environment that monitoring index is higher or image be had under the environment of coherence request, as the preventing road monitoring system for traffic lights, banking system etc., prior art often adopts following methods to realize synchronizeing of the watch-dogs such as video camera and civil power:
The outer synchronous triggering signal circuit that employing is comprised of photoelectrical coupler etc., from the ac supply signals such as civil power that receive, extract pulse signal, obtain the start trigger signal in each cycle of the ac supply signals such as civil power, and the outer synchronous triggering signal using the pulse signal extracting as watch-dogs such as follow-up video cameras; The operation principle of described outer synchronous triggering signal circuit is: when ac supply signal is during in positive half period, photoelectrical coupler conducting, outer synchronous triggering signal circuit output low level signal, when ac supply signal is during in negative half-cycle, not conducting of photoelectrical coupler, outer synchronous triggering signal circuit output high level signal.
When adopting said method to realize synchronizeing of the watch-dogs such as video camera and civil power, although can so that the captured interval of the every frame of video and cycle of civil power of the watch-dogs such as video camera consistent, but because described outer synchronous trigger circuit does not carry out the adjustment of the time delay of outer synchronous triggering signal, thereby cause the required triggering signal of the outer synchronous triggering signal that generates and external circuits also inconsistent, cause light emitting source or subject etc. may occur bright or excessively dark situation, synchronous effect is not good.
Summary of the invention
The embodiment of the present invention provides a kind of generation method and generation equipment of outer synchronous triggering signal, thereby causes the not good problem of synchronous effect in order to solve the time delay that cannot adjust outer synchronous triggering signal existing in prior art.
A generation equipment for outer synchronous triggering signal, the generation equipment of described outer synchronous triggering signal comprises triggering signal generation module and triggering signal adjusting module, wherein:
Described triggering signal generation module, for generating period square-wave signal, and using described periodic square wave signal as the outer synchronous triggering signal generating;
Described triggering signal adjusting module, adjust, and the periodic square wave signal after adjusting is exported as outer synchronous triggering signal for the initial time at the edge of periodic square wave signal that triggering signal generation module is generated.
A method of utilizing the outer synchronous triggering signal of generation equipment generation of above-mentioned outer synchronous triggering signal, described method comprises:
Utilize triggering signal generation module generating period square-wave signal, and using described periodic square wave signal as the outer synchronous triggering signal generating;
Utilize triggering signal adjusting module to adjust the initial time at the edge of the periodic square wave signal of triggering signal generation module generation, and the periodic square wave signal after adjusting is exported as outer synchronous triggering signal.
Beneficial effect of the present invention is as follows:
The embodiment of the present invention provides a kind of generation method and apparatus of outer synchronous triggering signal, the generation equipment of described outer synchronous triggering signal comprises triggering signal generation module and triggering signal adjusting module, wherein, described triggering signal generation module is for generating period square-wave signal, and using described periodic square wave signal as the outer synchronous triggering signal generating, described triggering signal adjusting module is adjusted for the initial time at the edge of periodic square wave signal that triggering signal generation module is generated, and the periodic square wave signal after adjusting is exported as outer synchronous triggering signal.By technical scheme of the present invention, can be according to the feature of the required outer synchronous triggering signal of external circuits, time delay to the initial outer synchronous triggering signal extracting is adjusted, thereby solved the time delay that cannot adjust outer synchronous triggering signal in prior art, cause the required triggering signal of the outer synchronous triggering signal that generates and external circuits also inconsistent, cause the not good problem of synchronous effect.
Accompanying drawing explanation
Figure 1 shows that the structural representation of the generation equipment of outer synchronous triggering signal described in the embodiment of the present invention one;
Figure 2 shows that the structural representation of the generation equipment of outer synchronous triggering signal described in the embodiment of the present invention two;
Figure 3 shows that the concrete structure schematic diagram of triggering signal generation module described in the embodiment of the present invention two;
Figure 4 shows that the concrete structure schematic diagram of the first adjustment submodule described in the embodiment of the present invention two;
Figure 5 shows that the concrete structure schematic diagram of the second adjustment submodule described in the embodiment of the present invention two;
Figure 6 shows that the concrete structure schematic diagram of the module of triggering signal negate described in the embodiment of the present invention two;
Figure 7 shows that the signal waveform conversion schematic diagram of each module in the generation equipment of outer synchronous triggering signal described in the embodiment of the present invention two;
Figure 8 shows that the method flow schematic diagram that generates outer synchronous triggering signal described in the embodiment of the present invention three.
Embodiment
Below in conjunction with Figure of description, embodiments of the present invention is further illustrated, but the present invention is not limited to the following examples.
Embodiment mono-:
As shown in Figure 1, it is the structural representation one of the generation equipment of outer synchronous triggering signal described in the embodiment of the present invention one, and the generation equipment of described outer synchronous triggering signal comprises triggering signal generation module 11 and triggering signal adjusting module 12, wherein:
Described triggering signal generation module 11 is for generating period square-wave signal, and the outer synchronous triggering signal using described periodic square wave signal as generation; Particularly, described triggering signal generation module 11 is for the ac supply signal receiving being converted to the periodic square wave signal consistent with described ac supply signal sequential, and the outer synchronous triggering signal using described periodic square wave signal as generation; Further, described ac supply signal can be the ac supply signals such as 24V, 48V or 220V, and the embodiment of the present invention is not limited in any way this.
Described triggering signal adjusting module 12 is adjusted for the initial time at the edge of periodic square wave signal that triggering signal generation module 11 is generated, and the periodic square wave signal after adjusting is exported as outer synchronous triggering signal.
Particularly, described triggering signal adjusting module 12 is converted to and the equal periodicity modulus analog signal of consistent monotone increasing of the frequency of described periodic square wave signal and initial time for the periodic square wave signal that triggering signal generation module 11 is generated, and the threshold voltage signal of described periodicity modulus analog signal and setting is carried out to the comparison of magnitude of voltage, and, according to comparative result, described periodicity modulus analog signal is converted to periodic square wave signal, and the outer synchronous triggering signal output after adjusting using the periodic square wave signal after conversion, wherein, the magnitude of voltage that the initial time at the edge of this periodic square wave signal (being the periodic square wave signal after adjustment) after changing is described periodicity modulus analog signal equals time of magnitude of voltage of the threshold voltage signal of described setting, further, the threshold voltage signal of described setting is the analog signal that CPU of external circuits or external device etc. produces by digital to analog converter, and its size can be set according to actual conditions, and the embodiment of the present invention is not limited in any way this.
Further, described triggering signal adjusting module 12 comprises the first adjustment submodule 121 and the second adjustment submodule 122, wherein:
Described first adjusts submodule 121 for the periodic square wave signal of triggering signal generation module 11 outputs being converted to and the equal periodicity modulus analog signal of consistent monotone increasing of the frequency of described periodic square wave signal and initial time, and described periodicity modulus analog signal is input to the second adjustment submodule 122, described second adjusts submodule 122 for carrying out the comparison of magnitude of voltage by what receive from the periodicity modulus analog signal of the first adjustment submodule 121 and the threshold voltage signal of setting, and according to comparative result, described periodicity modulus analog signal is converted to periodic square wave signal, and the outer synchronous triggering signal output after adjusting using the periodic square wave signal after conversion, wherein, the magnitude of voltage that the second initial time of adjusting the edge of the periodic square wave signal after changing that submodule 122 exports is described periodicity modulus analog signal equals time of magnitude of voltage of the threshold voltage signal of described setting.
Particularly, when the magnitude of voltage of the periodicity modulus analog signal of the first adjustment submodule 121 output is less than the magnitude of voltage of threshold voltage signal of setting, second adjusts submodule 122 output low level signals; When the magnitude of voltage of the periodicity modulus analog signal of the first adjustment submodule 121 output is more than or equal to the magnitude of voltage of threshold voltage signal of setting, second adjusts submodule 122 output high level signals.In addition, the magnitude of voltage that the described second initial time of adjusting the edge of the periodic square wave signal after the conversion that submodule 122 exports is the periodicity modulus analog signal of the first adjustment submodule 121 outputs equals the moment of the magnitude of voltage of the threshold voltage signal set.
More preferably, described outer synchronous triggering signal circuit also comprises triggering signal negate module 13:
Described triggering signal negate module 13 is carried out inversion operation for the outer synchronous triggering signal that triggering signal adjusting module 12 is exported, thereby realizes the objects such as different output and input level conversions, increase driving force, cooperation back-end circuit collection CPU sampling edge requirement; It should be noted that, if the signal that described triggering signal adjusting module 12 is exported enough meets the needs of back-end circuit, can not use described triggering signal negate module 13, the present invention is not limited in any way this.
It should be noted that, respectively forming module and can adopt the method for software and/or hardware to realize in the generation equipment of outer synchronous triggering signal described in the embodiment of the present invention and the generation equipment of described outer synchronous triggering signal, be that the embodiment of the present invention can adopt complete hardware implementation example, implement software example or in conjunction with the form of the embodiment of software and hardware aspect, the embodiment of the present invention is not limited in any way this completely.
The embodiment of the present invention one provides a kind of generation equipment of outer synchronous triggering signal, the generation equipment of described outer synchronous triggering signal comprises triggering signal generation module and triggering signal adjusting module, wherein, described triggering signal generation module is for generating period square-wave signal, and the outer synchronous triggering signal using described periodic square wave signal as generation; Described triggering signal adjusting module is adjusted for the initial time at the edge of periodic square wave signal that triggering signal generation module is generated, and the periodic square wave signal after adjusting is exported as outer synchronous triggering signal.By technical scheme described in the embodiment of the present invention one, can be according to the feature of the required outer synchronous triggering signal of external circuits, (initial time at the edge of initial outer synchronous triggering signal is adjusted) adjusted in time delay to the initial outer synchronous triggering signal extracting, thereby solved the time delay that cannot adjust outer synchronous triggering signal in prior art, cause the required triggering signal of the outer synchronous triggering signal that generates and external circuits also inconsistent, cause the not good problem of synchronous effect.
Embodiment bis-:
The embodiment of the present invention two is detailed descriptions that the generation equipment of outer synchronous triggering signal described in the embodiment of the present invention one is carried out, outside described in the embodiment of the present invention two, each module of the generation equipment of synchronous triggering signal mainly adopts the form of hardware circuit to realize, but it should be noted that, described in the embodiment of the present invention generation equipment of outer synchronous triggering signal with and each module of comprising mode that can also adopt software or software to combine with hardware realize, the embodiment of the present invention is not limited in any way this.
As shown in Figure 2, it is the structural representation of the generation equipment of outer synchronous triggering signal described in the embodiment of the present invention two, and the generation equipment of described outer synchronous triggering signal comprises triggering signal generation module 11 and triggering signal adjusting module 12, wherein:
Described triggering signal generation module 11 is for generating period square-wave signal, and the outer synchronous triggering signal using described periodic square wave signal as generation; Particularly, described triggering signal generation module 11 is for the ac supply signal receiving being converted to the periodic square wave signal consistent with described ac supply signal sequential, and the outer synchronous triggering signal using described periodic square wave signal as generation; Further, described ac supply signal can be the ac supply signals such as 24V, 48V or 220V, and the embodiment of the present invention is not limited in any way this.
Particularly, (Fig. 3 is the concrete structure schematic diagram of triggering signal generation module 11 described in the embodiment of the present invention two) as shown in Figure 2 or Figure 3, described triggering signal generation module 11 comprises photoelectrical coupler U1, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4 and the first capacitor C 1, wherein:
Through the second resistance R 2, the first resistance R 1, (AC power shown in Fig. 2 or Fig. 3 is 24V AC power to the 1st pin of described photoelectrical coupler U1: AC 24V) be connected with AC power successively, be connected to the 2nd pin and common mode, the 3rd pin ground connection, after the 4th pin is connected with the 4th resistance R 4, as the output of triggering signal extraction module 11, and the 4th pin is also connected with positive source (positive source shown in Fig. 2 or Fig. 3 is VCC) by the 3rd resistance R 3; Described the first capacitor C 1 is in parallel with the series circuit that the second resistance R 2, photoelectrical coupler U1 form, wherein, the anode of the interior light emitting diodes that the 1st pin of described photoelectrical coupler is described photoelectrical coupler, the negative electrode of the interior light emitting diodes that the 2nd pin is described photoelectrical coupler, the emitter of the inside phototriode that the 3rd pin is described photoelectrical coupler, the collector electrode of the inside phototriode that the 4th pin is described photoelectrical coupler.
The operation principle of described triggering signal generation module 11 is: by the ac supply signal to photoelectrical coupler U1 input 24V or other magnitude of voltage sizes (and/or common mode ground), utilize the forward conduction characteristic of photoelectrical coupler U1, extract the periodic square wave signal consistent with described ac supply signal sequential; Particularly, when ac supply signal is during in positive half period, photoelectrical coupler U1 conducting, triggering signal generation module 11 output low level signals (size of described low level signal is 0), when ac supply signal is during in negative half-cycle, not conducting of photoelectrical coupler U1, in open-circuit condition, triggering signal generation module 11 output high level signals (size of described high level signal equates with the voltage of positive source, is VCC).
It should be noted that, described triggering signal generation module 11 can also can convert the ac supply signal receiving to the electronic devices and components of periodic square wave signal consistent with described ac supply signal sequential or the combination of electronic devices and components realizes by other, and the embodiment of the present invention is not limited in any way this.
Described triggering signal adjusting module 12 is adjusted for the initial time at the edge of periodic square wave signal that triggering signal generation module 11 is generated, and the periodic square wave signal after adjusting is exported as outer synchronous triggering signal, particularly, described triggering signal adjusting module 12 is converted to and the equal periodicity modulus analog signal of consistent monotone increasing of the frequency of described periodic square wave signal and initial time for the periodic square wave signal that triggering signal generation module 11 is generated, and the threshold voltage signal of described periodicity modulus analog signal and setting is carried out to the comparison of magnitude of voltage, and, according to comparative result, described periodicity modulus analog signal is converted to periodic square wave signal, and the periodic square wave signal after conversion is exported as outer synchronous triggering signal, wherein, the magnitude of voltage that the initial time at the edge of this periodic square wave signal after changing is described periodicity modulus analog signal equals time of magnitude of voltage of the threshold voltage signal of described setting, further, the threshold voltage signal of described setting is the analog signal that CPU of external circuits or external device etc. produces by digital to analog converter, and its size can be set according to actual conditions, and the embodiment of the present invention is not limited in any way this.
Further, described triggering signal adjusting module 12 comprises the first adjustment submodule 121 and the second adjustment submodule 122, wherein:
Described first adjusts submodule 121 for the periodic square wave signal of triggering signal generation module 11 outputs being converted to and the equal periodicity modulus analog signal of consistent monotone increasing of the frequency of described periodic square wave signal and initial time, and described periodicity modulus analog signal is input to the second adjustment submodule 122, described second adjusts submodule 122 for carrying out the comparison of magnitude of voltage by what receive from the periodicity modulus analog signal of the first adjustment submodule 121 and the threshold voltage signal of setting, and according to comparative result, described periodicity modulus analog signal is converted to periodic square wave signal, and the periodic square wave signal after conversion is exported as outer synchronous triggering signal, wherein, the magnitude of voltage that the second initial time of adjusting the edge of the periodic square wave signal after changing that submodule 122 exports is described periodicity modulus analog signal equals time of magnitude of voltage of the threshold voltage signal of described setting.
Particularly, as shown in Fig. 2 or Fig. 4 (Fig. 4 is the concrete structure schematic diagram of the first adjustment submodule 121 described in the embodiment of the present invention two), described first adjusts submodule 121 comprises positive-negative-positive triode Q1, NPN type triode Q2, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4 and the 5th capacitor C 5, wherein:
The base stage (b) of described positive-negative-positive triode Q1 is connected with the output of triggering signal generation module 11 by the second capacitor C 2, the emitter (e) of described positive-negative-positive triode Q1 is connected with positive source (positive source shown in Fig. 2 or Fig. 4 is VCC), the collector electrode (c) of described positive-negative-positive triode Q1 is connected to the ground by the 6th resistance R 6, and the 5th resistance R 5 in parallel, the 3rd capacitor C 3 between the emitter (e) of described positive-negative-positive triode Q1 and base stage (b);
The base stage (b) of described NPN type triode Q2 is connected with the collector electrode (c) of positive-negative-positive triode Q1 by the 4th capacitor C 4, emitter (e) ground connection of described NPN type triode Q2, the collector electrode (c) of described NPN type triode Q2 is connected with positive source by the 8th resistance R 8, and the 7th resistance R 7 in parallel between the base stage (b) of described NPN type triode Q2 and emitter (e), the 5th capacitor C 5 in parallel between the collector electrode (c) of described NPN type triode Q2 and emitter (e), wherein, one end that described the 5th capacitor C 5 is connected with the collector electrode (c) of NPN type triode Q2 is the output of described the first adjustment submodule 121.
The described first operation principle of adjusting submodule 121 is: within each cycle, the moment that the signal of exporting when triggering signal generation module 11 is low level signal from high level signal redirect, positive-negative-positive triode Q1 and the equal conducting of NPN type triode Q2, voltage instantaneous in the 5th capacitor C 5 reduces to zero, and the first adjustment submodule 121 is zero signal to the second adjustment submodule 122 input voltage values; In other moment in this cycle, as the signal of triggering signal generation module 11 output is continuously low level signal or is high level signal or while being continuously high level signal from low level signal redirect, positive-negative-positive triode Q1 and all not conductings of NPN type triode Q2, the 8th resistance R 8 and the 5th capacitor C 5 form RC charge circuit, the 5th capacitor C 5 is always in charged state, and first adjusts submodule 121 to the second adjustment submodule 122 input voltage values from zero signal constantly rising.
It should be noted that, described first adjust submodule 121 can also by other periodic square wave signal of described triggering signal generation module 11 outputs can be converted to the frequency of described periodic square wave signal and initial time all the electronic devices and components of periodicity modulus analog signal or the combination of electronic devices and components of consistent monotone increasing realize, the embodiment of the present invention is not limited in any way this.
Particularly, as shown in Fig. 2 or Fig. 5 (Fig. 5 is the concrete structure schematic diagram of the second adjustment submodule 122 described in the embodiment of the present invention two), described second adjusts submodule 122 comprises operational amplifier U2, the 6th capacitor C 6, the 9th resistance R 9, the tenth resistance R 10 and the 11 resistance R 11, wherein:
The reverse input end of described operational amplifier U2 ("-") is connected with the output of the first adjustment submodule 121, the parallel circuits ground connection that the in-phase input end of described operational amplifier U2 ("+") is connected and passes through to be comprised of the 6th capacitor C 6 and the 9th resistance R 9 with the output of the threshold voltage signal (Phase_Set as shown in Fig. 2 or Fig. 5) of setting by the tenth resistance R 10, the output of described operational amplifier U2 is that the described second output of adjusting submodule 122 or triggering signal adjusting module 12 is also connected with positive source (positive source shown in Fig. 2 or Fig. 5 is VCC) by the 11 resistance R 11.
The described second operation principle of adjusting submodule 122 is: when the magnitude of voltage of the periodicity modulus analog signal of the first adjustment submodule 121 outputs is less than the magnitude of voltage of threshold voltage signal of setting, second adjusts submodule 122 output low level signals; When the magnitude of voltage of the periodicity modulus analog signal of the first adjustment submodule 121 output is more than or equal to the magnitude of voltage of threshold voltage signal of setting, second adjusts submodule 122 output high level signals; That is to say, the size of the threshold voltage signal magnitude of voltage of setting by control, can realize the time that the first periodicity modulus analog signal of adjusting submodule 121 outputs arrives the threshold voltage signal magnitude of voltage of this setting of adjusting, and then reach and adjust the second initial time of adjusting the edge of the periodic square wave signal (the Phase_Out A as shown in Fig. 2 or Fig. 5) after the conversion that submodule 122 exports, realize the object of the time delay of adjusting outer synchronous triggering signal.
It should be noted that, described second adjusts submodule 122 can also can carry out the comparison of magnitude of voltage from the periodicity modulus analog signal of the first adjustment submodule 121 and the threshold voltage signal of setting by what receive by other, and the combination (as comparator etc.) that described periodicity modulus analog signal is converted to electronic devices and components or the electronic devices and components of periodic square wave signal according to comparative result realizes, the embodiment of the present invention is not limited in any way this.
More preferably, described outer synchronous triggering signal circuit also comprises triggering signal negate module 13:
Described triggering signal negate module 13 is carried out inversion operation for the outer synchronous triggering signal that triggering signal adjusting module 12 is exported, thereby realizes the objects such as different output and input level conversions, increase driving force, cooperation back-end circuit collection CPU sampling edge requirement; It should be noted that, if the signal that described triggering signal adjusting module 12 is exported enough meets the needs of back-end circuit, can not use described triggering signal negate module 13, the present invention is not limited in any way this.
Particularly, as shown in Fig. 2 or Fig. 6 (Fig. 6 is the concrete structure schematic diagram of the module of triggering signal negate described in the embodiment of the present invention two 13), described triggering signal negate module 13 comprises reverser U3 and the 12 resistance R 12, wherein:
The input of described reverser U3 is connected with the output of triggering signal adjusting module 12, after the output of described reverser U3 is connected with the 12 resistance R 12 as the output of triggering signal negate module 13.
The operation principle of described triggering signal negate module 13 is: when triggering signal adjusting module 12(or second adjusts submodule 122) signal of output is while being low level signal, triggering signal negate module 13 output high level signals; When triggering signal adjusting module 12(or second adjusts submodule 122) signal of output is while being high level signal, triggering signal negate module 13 output low level signals (signal of described triggering signal negate module 13 outputs is the Phase_Out shown in Fig. 2 or Fig. 6).
It should be noted that, the combination (as comparator etc.) that the outer synchronous triggering signal that described triggering signal negate module 13 can also can be exported described triggering signal adjusting module 12 by other carries out electronic devices and components or the electronic devices and components of inversion operation realizes, and the embodiment of the present invention is not limited in any way this.
Further, the conversion of the signal waveform between the modules of the generation equipment of described outer synchronous triggering signal schematic diagram can be as shown in Figure 7.
Particularly, waveform in Fig. 7 (a) is the ac supply signal to 11 inputs of triggering signal generation module, waveform (b) is the periodic square wave signal of triggering signal generation module 11 outputs, waveform (c) is the periodicity modulus analog signal (straight line that is labeled as Phase_Set in this waveform c is the threshold voltage signal of the setting of outside input) of the monotone increasing of the first adjustment submodule 121 outputs, waveform (d) is the second adjustment submodule 122(or triggering signal adjusting module 12) output conversion after periodic square wave signal, waveform (e) is the periodic square wave signal after negate is processed of triggering signal negate module 13 outputs.
It should be noted that, the maximum of the periodicity modulus analog signal of the monotone increasing of described the first adjustment submodule 121 outputs is VCC-Δ V, and wherein said Δ V is circuit evanescent voltage value; And it is cycle period that the signal that each module is exported all be take time of 1T, the time of the ac supply signal one-period that 1T inputs; In addition, the Δ t in waveform (e) is the delay time of the triggering signal that the threshold voltage signal adjustment of the setting of inputting by outside obtains; After obtaining the periodic square wave signal after negate is processed of triggering signal negate module 13 outputs, can utilize the trailing edge of the periodic square wave signal after this negate is processed as the start time point of outer synchronous triggering signal.
Embodiment tri-:
As shown in Figure 8, it is for utilizing the generation equipment of outer synchronous triggering signal described in embodiment mono-to generate the method flow schematic diagram of outer synchronous triggering signal described in the embodiment of the present invention three, and the method for the outer synchronous triggering signal of described generation comprises the following steps:
Step 101: utilize triggering signal generation module generating period square-wave signal, and using described periodic square wave signal as the outer synchronous triggering signal generating.
Particularly, utilize triggering signal generation module to convert the ac supply signal receiving to the periodic square wave signal consistent with described ac supply signal sequential, and using described periodic square wave signal as the outer synchronous triggering signal generating.
Step 102: utilize triggering signal adjusting module to adjust the initial time at the edge of the periodic square wave signal of triggering signal generation module generation, and the periodic square wave signal after adjusting is exported as final outer synchronous triggering signal.
Particularly, the periodic square wave signal of utilizing triggering signal adjusting module that triggering signal generation module is generated is converted to and the equal periodicity modulus analog signal of consistent monotone increasing of the frequency of described periodic square wave signal and initial time, and the threshold voltage signal of described periodicity modulus analog signal and setting is carried out to the comparison of magnitude of voltage, and, according to comparative result, described periodicity modulus analog signal is converted to periodic square wave signal, and the periodic square wave signal after conversion is exported as outer synchronous triggering signal, wherein, the magnitude of voltage that the initial time at the edge of this periodic square wave signal after changing is described periodicity modulus analog signal equals time of magnitude of voltage of the threshold voltage signal of described setting.
Further, when the magnitude of voltage of described periodicity modulus analog signal is less than the magnitude of voltage of threshold voltage signal of setting, triggering signal adjusting module output low level signal; When the magnitude of voltage of described periodicity modulus analog signal is more than or equal to the magnitude of voltage of threshold voltage signal of setting, triggering signal adjusting module output high level signal.The magnitude of voltage that the initial time at the edge of the periodic square wave signal after the conversion that in addition, described triggering signal adjusting module is exported is described periodicity modulus analog signal equals the moment of the magnitude of voltage of the threshold voltage signal set.
More preferably, the method for the outer synchronous triggering signal of described generation can also comprise the following steps:
The outer synchronous triggering signal that utilizes triggering signal negate module to export triggering signal adjusting module carries out inversion operation, obtain the periodic square wave signal after negate is processed, and using resulting periodic square wave signal after negate is processed as the outer synchronous triggering signal finally obtaining.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (11)
1. a generation equipment for outer synchronous triggering signal, is characterized in that, the generation equipment of described outer synchronous triggering signal comprises triggering signal generation module and triggering signal adjusting module:
Described triggering signal generation module, for generating period square-wave signal, and using described periodic square wave signal as the outer synchronous triggering signal generating;
Described triggering signal adjusting module, adjust, and the periodic square wave signal after adjusting is exported as outer synchronous triggering signal for the initial time at the edge of periodic square wave signal that triggering signal generation module is generated.
2. the generation equipment of outer synchronous triggering signal as claimed in claim 1, is characterized in that,
Described triggering signal generation module, specifically for the ac supply signal receiving being converted to the periodic square wave signal consistent with described ac supply signal sequential, and using described periodic square wave signal as the outer synchronous triggering signal generating.
3. the generation equipment of outer synchronous triggering signal as claimed in claim 2, is characterized in that,
Described triggering signal adjusting module, specifically for the periodic square wave signal that triggering signal generation module is generated, be converted to and the equal periodicity modulus analog signal of consistent monotone increasing of the frequency of described periodic square wave signal and initial time, and the threshold voltage signal of described periodicity modulus analog signal and setting is carried out to the comparison of magnitude of voltage, and, according to comparative result, described periodicity modulus analog signal is converted to periodic square wave signal, and the periodic square wave signal after conversion is exported as outer synchronous triggering signal, wherein, the magnitude of voltage that the initial time at the edge of this periodic square wave signal after changing is described periodicity modulus analog signal equals time of magnitude of voltage of the threshold voltage signal of described setting.
4. the generation equipment of outer synchronous triggering signal as claimed in claim 3, is characterized in that, described triggering signal adjusting module comprises the first adjustment submodule and the second adjustment submodule:
Described first adjusts submodule, for the periodic square wave signal of triggering signal generation module output being converted to and the equal periodicity modulus analog signal of consistent monotone increasing of the frequency of described periodic square wave signal and initial time, and described periodicity modulus analog signal is input to the second adjustment submodule;
Described second adjusts submodule, for carrying out the comparison of magnitude of voltage by what receive from the periodicity modulus analog signal of the first adjustment submodule and the threshold voltage signal of setting, and according to comparative result, described periodicity modulus analog signal is converted to periodic square wave signal, and the periodic square wave signal after conversion is exported as outer synchronous triggering signal, wherein, the magnitude of voltage that the second initial time of adjusting the edge of the periodic square wave signal after changing that submodule exports is described periodicity modulus analog signal equals time of magnitude of voltage of the threshold voltage signal of described setting.
5. the generation equipment of outer synchronous triggering signal as claimed in claim 1, is characterized in that, described outer synchronous triggering signal circuit also comprises triggering signal negate module:
Described triggering signal negate module, carries out inversion operation for the outer synchronous triggering signal that triggering signal adjusting module is exported.
6. the generation equipment of outer synchronous triggering signal as claimed in claim 1, is characterized in that, described triggering signal generation module comprises photoelectrical coupler, the first resistance, the second resistance, the 3rd resistance, the 4th resistance and the first electric capacity, wherein:
The 1st pin of described photoelectrical coupler is successively through the second resistance, the first resistance is connected with AC power, be connected to the 2nd pin and common mode, the 3rd pin ground connection, after the 4th pin is connected with the 4th resistance as the output of triggering signal generation module, and the 4th pin is connected with positive source by the 3rd resistance, wherein, the anode of the interior light emitting diodes that the 1st pin of described photoelectrical coupler is described photoelectrical coupler, the negative electrode of the interior light emitting diodes that the 2nd pin is described photoelectrical coupler, the emitter of the inside phototriode that the 3rd pin is described photoelectrical coupler, the collector electrode of the inside phototriode that the 4th pin is described photoelectrical coupler,
Described the first electric capacity is in parallel with the series circuit that the second resistance, photoelectrical coupler form.
7. the generation equipment of outer synchronous triggering signal as claimed in claim 4, it is characterized in that, described first adjusts submodule comprises positive-negative-positive triode, NPN type triode, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the second electric capacity, the 3rd electric capacity, the 4th electric capacity and the 5th electric capacity, wherein:
The base stage of described positive-negative-positive triode is connected with the output of triggering signal generation module by the second electric capacity, the emitter of described positive-negative-positive triode is connected with positive source, the collector electrode of described positive-negative-positive triode is connected to the ground by the 6th resistance, and the 5th resistance in parallel, the 3rd electric capacity between the emitter of described positive-negative-positive triode and base stage;
The base stage of described NPN type triode is connected with the collector electrode of positive-negative-positive triode by the 4th electric capacity, the grounded emitter of described NPN type triode, the collector electrode of described NPN type triode is connected with positive source by the 8th resistance, and the 5th electric capacity in parallel between the collector electrode of the 7th resistance in parallel, described NPN type triode and emitter between the base stage of described NPN type triode and emitter, wherein, one end that described the 5th electric capacity is connected with the collector electrode of NPN type triode is the output of described the first adjustment submodule;
Described second adjusts submodule comprises operational amplifier, the 6th electric capacity, the 9th resistance, the tenth resistance and the 11 resistance, wherein:
The reverse input end of described operational amplifier is connected with the output of the first adjustment submodule, the parallel circuits ground connection that the in-phase input end of described operational amplifier is connected with the output of the threshold voltage signal of setting and is passed through to be comprised of the 6th electric capacity and the 9th resistance by the tenth resistance, the output of described operational amplifier is that the described second output of adjusting submodule or triggering signal adjusting module is also connected with positive source by the 11 resistance.
8. the generation equipment of outer synchronous triggering signal as claimed in claim 5, is characterized in that, described triggering signal negate module comprises reverser and the 12 resistance, wherein:
The input of described reverser is connected with the output of triggering signal adjusting module, after the output of described reverser is connected with the 12 resistance as the output of triggering signal negate module.
9. a method of utilizing the outer synchronous triggering signal of generation equipment generation of the arbitrary described outer synchronous triggering signal of claim 1 ~ 8, is characterized in that, described method comprises:
Utilize triggering signal generation module generating period square-wave signal, and using described periodic square wave signal as the outer synchronous triggering signal generating;
Utilize triggering signal adjusting module to adjust the initial time at the edge of the periodic square wave signal of triggering signal generation module generation, and the periodic square wave signal after adjusting is exported as outer synchronous triggering signal.
10. the method for the outer synchronous triggering signal of generation as claimed in claim 9, is characterized in that, utilizes triggering signal generation module to generate outer synchronous triggering signal, specifically comprises:
Utilize triggering signal generation module to convert the ac supply signal receiving to the periodic square wave signal consistent with described ac supply signal sequential, and using described periodic square wave signal as the outer synchronous triggering signal generating.
The method of the outer synchronous triggering signal of 11. generations as claimed in claim 10, it is characterized in that, utilize triggering signal adjusting module to adjust the initial time at the edge of the periodic square wave signal of triggering signal generation module generation, and the periodic square wave signal after adjustment is exported as outer synchronous triggering signal, specifically comprise:
The periodic square wave signal of utilizing triggering signal adjusting module that triggering signal generation module is generated is converted to and the equal periodicity modulus analog signal of consistent monotone increasing of the frequency of described periodic square wave signal and initial time, and the threshold voltage signal of described periodicity modulus analog signal and setting is carried out to the comparison of magnitude of voltage, and, according to comparative result, described periodicity modulus analog signal is converted to periodic square wave signal, and the periodic square wave signal after conversion is exported as outer synchronous triggering signal, wherein, the magnitude of voltage that the initial time at the edge of this periodic square wave signal after changing is described periodicity modulus analog signal equals time of magnitude of voltage of the threshold voltage signal of described setting.
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