CN111726107A - Mean value follow-up spark judgment latch circuit - Google Patents
Mean value follow-up spark judgment latch circuit Download PDFInfo
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- CN111726107A CN111726107A CN202010516681.2A CN202010516681A CN111726107A CN 111726107 A CN111726107 A CN 111726107A CN 202010516681 A CN202010516681 A CN 202010516681A CN 111726107 A CN111726107 A CN 111726107A
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- operational amplifier
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- latch
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/353—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of field-effect transistors with internal or external positive feedback
- H03K3/356—Bistable circuits
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Abstract
The invention discloses an average value follow-up type spark judgment latch circuit, which belongs to the technical field of latch circuits and comprises a rectifier transformer and a sampling unit connected with the rectifier transformer, wherein the output end of the sampling unit is connected with a follower, the output end of the follower is respectively connected with a filter and a peak voltage divider, the filter and a potential compensator are both connected with an adder, the peak voltage divider and the adder are both connected with a comparator, the output end of the comparator is connected with a latch, the latch is respectively connected with a CPU and a driver, the CPU is connected with the driver, the output end of the driver is connected with a power inverter, and the power inverter is connected with the rectifier transformer. The processing of the spark flashover greatly reduces the time requirement, and effectively reduces the resource burden of a CPU; the latch output of the invention automatically turns off the power drive after spark flashover, and the equipment can not be damaged even if the CPU is halted, thereby improving the stability and reliability of the equipment.
Description
Technical Field
The invention belongs to the technical field of latch circuits, and particularly relates to an average value follow-up type spark judgment latch circuit.
Background
An electric dust collector is a dust collecting device which adsorbs charged dust on a dust collecting electrode under the action of high-voltage electric field force so as to strip solid dust particles from dust-containing gas, and is widely applied to industries such as electric power, metallurgy, building materials, chemical industry, petroleum, textile, boilers, steel and the like at present.
Because the distance between the dust collecting electrode and the discharge electrode in the electric dust collector is influenced by factors such as temperature, humidity, wind speed and the like and is likely to change, after the distance changes, the space withstand voltage of the electric dust collector changes, spark flashover occurs in the dust collector and serves as a power supply for supplying power to the dust collector, the spark flashover must be judged in time, the power module is turned off to stop high-voltage power supply, the electric energy waste is prevented, the dust collecting efficiency is recovered, and the reliable operation of the power supply is protected. The existing dust removal power supply adopts software signal sampling to judge spark breakdown, the judgment delay time is long, electric energy waste is caused, the CPU is excessively depended on, the CPU is possibly halted due to strong interference during spark breakdown, and the stability and the reliability of equipment are influenced.
Disclosure of Invention
To solve the problems set forth in the background art described above. The invention provides an average value follow-up spark judgment latch circuit which has the characteristics of small judgment delay, independent completion of hardware, hardware signal latch and direct control of a power module.
In order to achieve the purpose, the invention provides the following technical scheme: the output end of the sampling unit is connected with a follower, the output end of the follower is respectively connected with a filter and a peak voltage divider, the filter and a potential compensator are respectively connected with an adder, the peak voltage divider and the adder are respectively connected with a comparator, the output end of the comparator is connected with a latch, the latch is respectively connected with a CPU and a driver, the CPU is connected with the driver, the output end of the driver is connected with a power inverter, and the power inverter is connected with the rectifier transformer.
Preferably, the follower comprises an operational amplifier U3, a resistor R15 is connected to a pin 3 of the operational amplifier U3, a resistor R15 is connected to the output end of the sampling unit, a pin 2 of the operational amplifier U3 is connected to the filter, and a pin 1 of the operational amplifier U3 is connected to the peak voltage divider.
Preferably, the filter comprises a resistor R4 and a capacitor C1, wherein one end of the resistor R4 is connected with the 2 pin of the operational amplifier U3, the other end of the resistor R4 is respectively connected with the adder and the capacitor C1, and the other end of the capacitor C1 is grounded.
Preferably, the peak voltage divider comprises a slide rheostat R6, one end of a slide rheostat R6 is connected with a pin 1 of the operational amplifier U3, the other end of the slide rheostat R6 is grounded, and the sliding end of the slide rheostat R6 is connected with the comparator.
Preferably, the adder includes an operational amplifier U4A, a resistor R12, a resistor R11, a resistor R10 and a resistor R9, wherein a pin 2 of the operational amplifier U4A is connected to the resistor R9 and the resistor R12, respectively, the other end of the resistor R12 is grounded, the other end of the resistor R9 is connected to a pin 1 of the operational amplifier U4A and the resistor R14, the other end of the resistor R14 is connected to the comparator, a pin 3 of the operational amplifier U4A is connected to the resistor R10 and the resistor R11, the other end of the resistor R11 is connected to the potential compensator, and the other end of the resistor R10 is connected to the resistor R4.
Preferably, the comparator comprises an operational amplifier U2A, a resistor R5 and a resistor R7, wherein a pin 2 of the operational amplifier U2A is connected with the resistor R14, a pin 3 of the operational amplifier U2A is connected with the resistor R7, the other end of the resistor R7 is connected with a sliding end of the resistor R6, and a pin 1 of the operational amplifier U2A is respectively connected with the resistor R5 and the latch.
Compared with the prior art, the invention has the beneficial effects that:
1. the processing of the spark flashover greatly reduces the time requirement, and effectively reduces the resource burden of a CPU;
2. the latch output of the invention automatically turns off the power drive after spark flashover, and the equipment can not be damaged even if the CPU is halted, thereby improving the stability and reliability of the equipment.
Drawings
FIG. 1 is a schematic diagram of the circuit structure of the present invention;
FIG. 2 is a block diagram of the system of the present invention;
FIG. 3 is a schematic circuit diagram of a follower in accordance with the present invention;
FIG. 4 is a schematic circuit diagram of a filter according to the present invention;
FIG. 5 is a circuit schematic of the peak voltage divider of the present invention;
FIG. 6 is a schematic circuit diagram of the voltage level compensator according to the present invention;
FIG. 7 is a circuit schematic of the comparator of the present invention;
FIG. 8 is a circuit schematic of a latch according to the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-8, the present invention provides the following technical solutions: the output end of the sampling unit is connected with a follower, the output end of the follower is respectively connected with a filter and a peak voltage divider, the filter and a potential compensator are respectively connected with an adder, the peak voltage divider and the adder are respectively connected with a comparator, the output end of the comparator is connected with a latch, the latch is respectively connected with a CPU and a driver, the CPU is connected with the driver, the output end of the driver is connected with a power inverter, and the power inverter is connected with the rectifier transformer.
Specifically, the follower comprises an operational amplifier U3, a pin 3 of the operational amplifier U3 is connected with a resistor R15, a resistor R15 is connected with the output end of the sampling unit, a pin 2 of the operational amplifier U3 is connected with a filter, and a pin 1 of the operational amplifier U3 is connected with a peak voltage divider.
Specifically, the filter comprises a resistor R4 and a capacitor C1, wherein one end of the resistor R4 is connected with the 2 pin of the operational amplifier U3, the other end of the resistor R4 is connected with the adder and the capacitor C1 respectively, and the other end of the capacitor C1 is grounded.
Specifically, the peak voltage divider comprises a slide rheostat R6, one end of a slide rheostat R6 is connected with a pin 1 of an operational amplifier U3, the other end of the slide rheostat R6 is grounded, and the sliding end of the slide rheostat R6 is connected with a comparator.
Specifically, the adder includes an operational amplifier U4A, a resistor R12, a resistor R11, a resistor R10 and a resistor R9, wherein a pin 2 of the operational amplifier U4A is connected to the resistor R9 and the resistor R12, respectively, the other end of the resistor R12 is grounded, the other end of the resistor R9 is connected to a pin 1 of the operational amplifier U4A and the resistor R14, the other end of the resistor R14 is connected to a comparator, a pin 3 of the operational amplifier U4A is connected to the resistor R10 and the resistor R11, the other end of the resistor R11 is connected to the potential compensator, and the other end of the resistor R10 is connected to the resistor R4.
Specifically, the comparator comprises an operational amplifier U2A, a resistor R5 and a resistor R7, wherein a pin 2 of the operational amplifier U2A is connected with the resistor R14, a pin 3 of the operational amplifier U2A is connected with the resistor R7, the other end of the resistor R7 is connected with a sliding end of the resistor R6, and a pin 1 of the operational amplifier U2A is respectively connected with the resistor R5 and a latch.
The working principle and the using process of the invention are as follows: the input end of the invention is a resistor R15 of a follower, a transformer feedback signal of a high-frequency power supply is connected to a network point Vi, and in order to ensure that the signal is not distorted, the follower is adopted to enhance the load capacity of the feedback signal; the follower output is divided into two paths of signals, one path is used for carrying out average value filtering on the signals; the other path takes the original signal waveform and carries out adjustable voltage division. The average filter and the average compensation circuit are added by an adder, the compensated average is compared with the peak value, the feedback signal is suddenly increased when the spark flashover happens, so that the feedback signal is compared with the peak value, the result output of comparison output is connected to a latch to latch the spark flashover signal, the output of the latch is divided into two paths, one path is directly connected to a driver of the power module, and the work of the power module can be directly stopped; the other path is connected to the CPU, the CPU can perform subsequent processing work of spark flashover after receiving a spark flashover signal, the latch directly turns off power drive after the spark flashover, the requirement on time for processing the spark flashover is greatly reduced, the resource burden of the CPU is effectively reduced, the latch output automatically turns off the power drive after the spark flashover, and the equipment cannot be damaged even if the CPU is halted.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides an average value follow-up type spark judges latch circuit, includes rectifier transformer and the sampling unit who is connected with rectifier transformer, its characterized in that: the output end of the sampling unit is connected with the follower, the output end of the follower is respectively connected with the filter and the peak voltage divider, the filter and the potential compensator are both connected with the adder, the peak voltage divider and the adder are both connected with the comparator, the output end of the comparator is connected with the latch, the latch is respectively connected with the CPU and the driver, the CPU is connected with the driver, the output end of the driver is connected with the power inverter, and the power inverter is connected with the rectifier transformer.
2. The average value follow-up type spark judging latch circuit according to claim 1, wherein: the follower comprises an operational amplifier U3, a 3 pin of the operational amplifier U3 is connected with a resistor R15, a resistor R15 is connected with the output end of the sampling unit, a 2 pin of the operational amplifier U3 is connected with a filter, and a 1 pin of the operational amplifier U3 is connected with a peak voltage divider.
3. A mean value follow-up type spark judging latch circuit according to claim 2, wherein: the filter comprises a resistor R4 and a capacitor C1, wherein one end of the resistor R4 is connected with the 2 pin of the operational amplifier U3, the other end of the resistor R4 is connected with the adder and the capacitor C1 respectively, and the other end of the capacitor C1 is grounded.
4. A mean value follow-up type spark judging latch circuit according to claim 3, wherein: the peak voltage divider comprises a slide rheostat R6, one end of a slide rheostat R6 is connected with a pin 1 of an operational amplifier U3, the other end of a slide rheostat R6 is grounded, and the sliding end of the slide rheostat R6 is connected with a comparator.
5. The average value follow-up type spark judging latch circuit according to claim 4, wherein: the adder comprises an operational amplifier U4A, a resistor R12, a resistor R11, a resistor R10 and a resistor R9, wherein a pin 2 of the operational amplifier U4A is respectively connected with the resistor R9 and the resistor R12, the other end of the resistor R12 is grounded, the other end of the resistor R9 is respectively connected with a pin 1 of the operational amplifier U4A and the resistor R14, the other end of the resistor R14 is connected with a comparator, a pin 3 of the operational amplifier U4A is respectively connected with the resistor R10 and the resistor R11, the other end of the resistor R11 is connected with a potential compensator, and the other end of the resistor R10 is connected with the resistor R4.
6. The average value follow-up type spark judging latch circuit according to claim 5, wherein: the comparator comprises an operational amplifier U2A, a resistor R5 and a resistor R7, wherein a pin 2 of the operational amplifier U2A is connected with the resistor R14, a pin 3 of the operational amplifier U2A is connected with the resistor R7, the other end of the resistor R7 is connected with a sliding end of the resistor R6, and a pin 1 of the operational amplifier U2A is respectively connected with the resistor R5 and a latch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010516681.2A CN111726107A (en) | 2020-06-09 | 2020-06-09 | Mean value follow-up spark judgment latch circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010516681.2A CN111726107A (en) | 2020-06-09 | 2020-06-09 | Mean value follow-up spark judgment latch circuit |
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| Publication Number | Publication Date |
|---|---|
| CN111726107A true CN111726107A (en) | 2020-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010516681.2A Withdrawn CN111726107A (en) | 2020-06-09 | 2020-06-09 | Mean value follow-up spark judgment latch circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116908636A (en) * | 2023-07-17 | 2023-10-20 | 北京中陆汇能科技有限公司 | Spark flashover judging method and circuit based on self-adjusting comparison point |
-
2020
- 2020-06-09 CN CN202010516681.2A patent/CN111726107A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116908636A (en) * | 2023-07-17 | 2023-10-20 | 北京中陆汇能科技有限公司 | Spark flashover judging method and circuit based on self-adjusting comparison point |
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Application publication date: 20200929 |