CN101442299A - Circuit for generating driving signal of ultrasonic power supply - Google Patents
Circuit for generating driving signal of ultrasonic power supply Download PDFInfo
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- CN101442299A CN101442299A CNA2007101708671A CN200710170867A CN101442299A CN 101442299 A CN101442299 A CN 101442299A CN A2007101708671 A CNA2007101708671 A CN A2007101708671A CN 200710170867 A CN200710170867 A CN 200710170867A CN 101442299 A CN101442299 A CN 101442299A
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Abstract
The invention relates to a drive signal generating circuit of an ultrasonic power supply, which comprises a waveform generating unit used to generate two channels of narrow impulse signals which correspond to input frequency (count value Q) and between which the phase difference is 180 degrees. The waveform generating unit comprises an all zero detector used to detect the time when the count value corresponding to the set frequency is zero, a median detector used to detect the time when the count value Q corresponding to the set frequency is half of Q, and a control signal generating circuit which is connected with the all zero detector and the median detector respectively and can control the counting mode and the operation of a dead zone controller according to the narrow impulses generated by the all zero detector and the median detector. The drive signal generating circuit has the advantages of simple structure, stable drive signal frequency generated, higher resolution and convenient regulation, and the functions of frequency sweep and soft start, and realizes intelligent control and power (frequency) tracking.
Description
Technical field
The present invention relates to a kind of ultrasonic power, especially refer to the drive signal generation circuit of ultrasonic power.
Background technology
Ultrasonic power generally is applied to supersonic wave cleaning machine, ultrasonic welding machine etc.
The ultrasonic power great majority use the special chip (being TL494, SG3525 as model) of analog/digital hybrid design to produce the ultrasonic power drive signal at present.This class chip disadvantage is the frequency instability, can be subjected to the influence of electromagnetic field and operating ambient temperature, and the frequency drift phenomenon is serious, and the control of not easy-to-use microprocessor, dynamic adjustments frequency and power complexity.
In addition, ultrasonic power also has the method by microprocessor (CPU) employing software programming to produce the ultrasonic power drive signal.But output waveform speed is slower, and the CPU inefficiency is difficult for increasing new function.
Therefore, in ultrasonic power, how to overcome the drawback of above-mentioned generation power drive signal, pay close attention to for the applicant and one of the content endeavouring to study all the time.
Summary of the invention
The present invention aims to provide a kind of drive signal generation circuit of ultrasonic power, makes that the driving signal frequency that is produced is stable, resolution is higher, easy to adjust, and possesses frequency sweep and soft start function, and Based Intelligent Control and merit (frequently) rate that can realize is followed the tracks of.
The drive signal generation circuit of a kind of ultrasonic power provided by the present invention is characterized in that: it comprises wave generating unit, is used to produce phase difference and is 180 ° two-way narrow pulse waveform; This wave generating unit comprises: full null detector, and being used to detect setpoint frequency value institute corresponding input count value is the zero moment; Median detector, be used to detect the setpoint frequency value corresponding input count value Q be the moment of Q/2; Control signal generation circuit links to each other with median detector with described full null detector respectively, and the narrow pulse signal that produces according to described full null detector and median detector, and flip-flop number is put the number operation and the control dead area work moment.
In the drive signal generation circuit of above-mentioned ultrasonic power, also comprise the dead band control circuit that links to each other with described wave generating unit, be used for according to described complete zero, the two-way narrow pulse signal of median detector output and the dead band working control signal of described control signal generation circuit output, finish the dead band time-delay, produce two-way ultrasonic wave drive signal.
In the drive signal generation circuit of above-mentioned ultrasonic power, the dead band control circuit comprises two corresponding with median detector with described full null detector respectively pulse shapers that are connected one by one, two corresponding with described pulse shaper respectively rest-set flip-flops that connect one by one, and the dead band controller that is connected with described two rest-set flip-flops respectively, wherein: two pulse shapers, the two-way narrow pulse signal that is respectively applied for described full null detector and median detector output carries out shaping and cuts down pulsewidth, to provide one tunnel triggering signal to each rest-set flip-flop; The dead band controller is used to be provided with the dead band delay time, provides the time-delay count end signal to rest-set flip-flop, triggers the rest-set flip-flop upset and realizes soft start function; Two rest-set flip-flops respectively according to the triggering signal of input, are realized the output level upset.
In the drive signal generation circuit of above-mentioned ultrasonic power, also comprise the frequency setting circuit that links to each other with described wave generating unit, be used for according to operating mode, finish frequency configuration and adjustment in real time, the count value Q of output frequency correspondence.
In the drive signal generation circuit of above-mentioned ultrasonic power, frequency setting circuit comprises the cycle prset counter, what link to each other with this cycle prset counter subtracts a counter, subtracts the frequency divider that a counter links to each other with described cycle prset counter with this respectively, wherein: the cycle prset counter, be used to preserve the peak frequency and the minimum frequency value of setting, to guarantee the stability and the swept frequency range of driving signal frequency; Subtract a counter, pairing count value Q subtracts an operation to the setpoint frequency value; Frequency divider is used to described cycle prset counter, subtracts the clock signal that a counter provides different divider ratios.
In the drive signal generation circuit of above-mentioned ultrasonic power, also comprise the frequency setting circuit that links to each other with described wave generating unit, be used for according to operating mode, finish frequency configuration and adjustment in real time, output count value Q.
In the drive signal generation circuit of above-mentioned ultrasonic power, the dead band control circuit comprises two corresponding with median detector with described full null detector respectively pulse shapers that are connected one by one, two corresponding with described pulse shaper respectively rest-set flip-flops that connect one by one, and the dead band controller that is connected with described two rest-set flip-flops respectively, wherein: two pulse shapers, the two-way narrow pulse signal that is respectively applied for described full null detector and median detector output carries out shaping and cuts down pulsewidth, to provide one tunnel triggering signal to each rest-set flip-flop; The dead band controller is used to be provided with the dead band delay time, provides the time-delay count end signal to rest-set flip-flop, triggers the rest-set flip-flop upset and realizes soft start function; Two rest-set flip-flops respectively according to the triggering signal of input, are realized the output level upset; Described frequency setting circuit comprises the cycle prset counter, what link to each other with this cycle prset counter subtracts a counter, subtracts the frequency divider that a counter links to each other with described cycle prset counter with this respectively, wherein: the cycle prset counter, be used to preserve the peak frequency and the minimum frequency value of setting, to guarantee the stability and the swept frequency range of driving signal frequency; Subtract a counter, pairing count value Q subtracts an operation to the setpoint frequency value; Frequency divider is used to described cycle prset counter, subtracts the clock signal that a counter and described dead band controller provide different divider ratios.
Owing to adopted above-mentioned technical solution, drive signal generation circuit of the present invention is not only simple in structure, and the driving signal frequency that is produced is stable, resolution is higher, easy to adjust, possess frequency sweep and soft start function, Based Intelligent Control and merit (frequently) rate that can realize is followed the tracks of.
Description of drawings
Fig. 1 is the functional block diagram of most preferred embodiment of the drive signal generation circuit of ultrasonic power of the present invention.
Embodiment
As shown in Figure 1, the most preferred embodiment of the drive signal generation circuit of ultrasonic power of the present invention comprises wave generating unit 1, dead band control circuit 2, frequency setting circuit 3.
Control signal generation circuit 11 is used for the burst pulse according to full null detector 12, median detector 13 generations, and control counter mode of operation and dead band controller work are constantly;
Dead band control circuit 2, be used for receiving the two-way burst pulse of full null detector 12 and median detector 13 outputs, the delay unit enabling signal of dead band controller 22 and the clock signal of frequency divider 31 outputs, finish the generation in dead band, produce two-way ultrasonic wave drive signal, and export this ultrasonic wave drive signal.It comprises:
Dead band controller 22, being used to be provided with the dead band delay time is the skip distance size, provides upset time trigger signal to rest-set flip-flop 23, realizes rest-set flip-flop 23 upset and soft start functions.
Rest-set flip-flop 23 is used for according to triggering signal, realizes the output level upset, thereby produces the drive signal of ultrasonic power.
Subtract a counter, be used for the pairing count value Q of setpoint frequency value is subtracted an operation.
Operation principle of the present invention is: cycle prset counter 32 presets initial value Q to subtracting a counter 33 earlier, then subtracts a counter 33 under the clock signal effect behind frequency divider 31 frequency divisions, realizes the computing that subtracts of binary number Q; Detect by median detector 13 and full null detector 12, produce short high level signal of two duration respectively, along with subtract a counter 33 once more initialize go round and begin again subtract an operation, trigger narrow pulse signal so produce two-way.With pulse shaper 21 with above-mentioned two-way start pulse signal high level narrowed width after, send into the input control end of rest-set flip-flop FF0 and FF1 respectively, dead band controller 22 produces another control end that control signal acts on rest-set flip-flop, the upset that postpones rest-set flip-flop forms the dead band constantly, thereby produces the ultrasonic wave drive signal.
Below most preferred embodiment has been described in detail the present invention in conjunction with the accompanying drawings, and those skilled in the art can make the many variations example to the present invention according to the above description.Thereby some details among the embodiment should not constitute limitation of the invention, and the scope that the present invention will define with appended claims is as protection scope of the present invention.
Claims (7)
1. the drive signal generation circuit of a ultrasonic power, it is characterized in that: it comprises wave generating unit, is used to produce phase difference and is 180 ° two-way narrow pulse waveform; This wave generating unit comprises:
Full null detector, being used to detect setpoint frequency value institute corresponding input count value is the zero moment;
Median detector, be used to detect the setpoint frequency value corresponding input count value Q be the moment of Q/2;
Control signal generation circuit links to each other with median detector with described full null detector respectively, and the narrow pulse signal that produces according to described full null detector and median detector, and flip-flop number is put the number operation and the control dead area work moment.
2. the drive signal generation circuit of ultrasonic power according to claim 1, it is characterized in that: it also comprises the dead band control circuit that links to each other with described wave generating unit, be used for according to described complete zero, the two-way narrow pulse signal of median detector output and the dead band working control signal of described control signal generation circuit output, finish the dead band time-delay, produce two-way ultrasonic wave drive signal.
3. the drive signal generation circuit of ultrasonic power according to claim 2, it is characterized in that: described dead band control circuit comprises two corresponding with median detector with described full the null detector respectively pulse shaper that is connected one by one, two corresponding with described pulse shaper respectively rest-set flip-flops that are connected one by one, and the dead band controller that is connected with described two rest-set flip-flops respectively, wherein:
Two pulse shapers, the two-way narrow pulse signal that is respectively applied for described full null detector and median detector output carries out shaping and cuts down pulsewidth, to provide one tunnel triggering signal to each rest-set flip-flop;
The dead band controller is used to be provided with the dead band delay time, provides the time-delay count end signal to rest-set flip-flop, triggers the rest-set flip-flop upset and realizes soft start function;
Two rest-set flip-flops respectively according to the triggering signal of input, are realized the output level upset.
4. the drive signal generation circuit of ultrasonic power according to claim 1, it is characterized in that: it also comprises the frequency setting circuit that links to each other with described wave generating unit, be used for according to operating mode, finish frequency configuration and adjustment in real time, the pairing count value Q of output frequency.
5. the drive signal generation circuit of ultrasonic power according to claim 4, it is characterized in that: described frequency setting circuit comprises the cycle prset counter, what link to each other with this cycle prset counter subtracts a counter, subtracts the frequency divider that a counter links to each other with described cycle prset counter with this respectively, wherein:
The cycle prset counter is used to preserve the peak frequency and the minimum frequency value of setting, to guarantee the stability and the swept frequency range of driving signal frequency;
Subtract a counter, pairing count value Q subtracts an operation to the setpoint frequency value;
Frequency divider is used to described cycle prset counter, subtracts the clock signal that a counter provides different divider ratios.
6. the drive signal generation circuit of ultrasonic power according to claim 2, it is characterized in that: it also comprises the frequency setting circuit that links to each other with described wave generating unit, is used for according to operating mode, finishes frequency configuration and adjustment in real time, output count value Q.
7. the drive signal generation circuit of ultrasonic power according to claim 6 is characterized in that:
Described dead band control circuit comprises two corresponding with median detector with described full the null detector respectively pulse shaper that is connected one by one, two corresponding with described pulse shaper respectively rest-set flip-flops that are connected one by one, and the dead band controller that is connected with described two rest-set flip-flops respectively, wherein:
Two pulse shapers, the two-way narrow pulse signal that is respectively applied for described full null detector and median detector output carries out shaping and cuts down pulsewidth, to provide one tunnel triggering signal to each rest-set flip-flop;
The dead band controller is used to be provided with the dead band delay time, provides the time-delay count end signal to rest-set flip-flop, triggers the rest-set flip-flop upset and realizes soft start function;
Two rest-set flip-flops respectively according to the triggering signal of input, are realized the output level upset;
Described frequency setting circuit comprises the cycle prset counter, and what link to each other with this cycle prset counter subtracts a counter, subtracts the frequency divider that a counter links to each other with described cycle prset counter with this respectively, wherein:
The cycle prset counter is used to preserve the peak frequency and the minimum frequency value of setting, to guarantee the stability and the swept frequency range of driving signal frequency;
Subtract a counter, pairing count value Q subtracts an operation to the setpoint frequency value;
Frequency divider is used to described cycle prset counter, subtracts the clock signal that a counter and described dead band controller provide different divider ratios.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101708671A CN101442299A (en) | 2007-11-23 | 2007-11-23 | Circuit for generating driving signal of ultrasonic power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101708671A CN101442299A (en) | 2007-11-23 | 2007-11-23 | Circuit for generating driving signal of ultrasonic power supply |
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| Publication Number | Publication Date |
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| CN101442299A true CN101442299A (en) | 2009-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2007101708671A Pending CN101442299A (en) | 2007-11-23 | 2007-11-23 | Circuit for generating driving signal of ultrasonic power supply |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954585A (en) * | 2016-04-22 | 2016-09-21 | 广东顺威精密塑料股份有限公司 | Ultrasonic power supply automatic frequency tracking system based on single-chip microcomputer (SCM) control |
| CN108816937A (en) * | 2018-08-17 | 2018-11-16 | 中南大学湘雅医院 | A kind of cleaning machine ultrasonic control system |
| CN109483038A (en) * | 2018-10-25 | 2019-03-19 | 东莞市恒生超声波设备有限公司 | It is a kind of to chase after frequency ultrasonic welding supply and its control method automatically |
-
2007
- 2007-11-23 CN CNA2007101708671A patent/CN101442299A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954585A (en) * | 2016-04-22 | 2016-09-21 | 广东顺威精密塑料股份有限公司 | Ultrasonic power supply automatic frequency tracking system based on single-chip microcomputer (SCM) control |
| CN108816937A (en) * | 2018-08-17 | 2018-11-16 | 中南大学湘雅医院 | A kind of cleaning machine ultrasonic control system |
| CN108816937B (en) * | 2018-08-17 | 2024-03-26 | 中南大学湘雅医院 | Ultrasonic control system of cleaning machine |
| CN109483038A (en) * | 2018-10-25 | 2019-03-19 | 东莞市恒生超声波设备有限公司 | It is a kind of to chase after frequency ultrasonic welding supply and its control method automatically |
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Open date: 20090527 |