CN114625059A - Integrated control circuit with feedback and signal blocking reset functions - Google Patents
Integrated control circuit with feedback and signal blocking reset functions Download PDFInfo
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- CN114625059A CN114625059A CN202210528220.6A CN202210528220A CN114625059A CN 114625059 A CN114625059 A CN 114625059A CN 202210528220 A CN202210528220 A CN 202210528220A CN 114625059 A CN114625059 A CN 114625059A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
- G05B19/0425—Safety, monitoring
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/003—Modifications for increasing the reliability for protection
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/007—Fail-safe circuits
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/0175—Coupling arrangements; Interface arrangements
- H03K19/017509—Interface arrangements
- H03K19/017536—Interface arrangements using opto-electronic devices
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Abstract
The invention discloses an integrated control circuit with feedback and signal blocking reset functions, which comprises a signal control circuit, a signal output circuit, a blocking and signal latching circuit, a power supply monitoring circuit and a signal feedback circuit. According to the integrated control circuit, the power monitoring circuit monitors the detection power supply to obtain the monitoring signal, the first isolation optocoupler is used for combining the fault feedback signal with the monitoring signal and outputting the monitoring feedback signal to the blocking and signal latching circuit, the blocking and signal latching circuit outputs the feedback signal to the signal control circuit, meanwhile, the output blocking and latching of the driving control signal are realized, and the driving control signal can be normally output only after the fault feedback signal is reset. The integrated control circuit can ensure that the control output signal is not output directly and wrongly according to the control signal under abnormal conditions, thereby improving the reliability and the safety of controlling the external actuating mechanism through the integrated control circuit.
Description
Technical Field
The invention relates to the technical field of energy conservation and environmental protection, in particular to an integrated control circuit with feedback and signal blocking reset functions.
Background
With the continuous development of intelligent control technology, automation equipment is widely applied in industrial production, and in the automation equipment, a control system generally needs to control an external execution mechanism through an isolated DO (digital output) circuit in order to control each execution part. The prior art generally adopts the control circuit to directly control without feedback, the state of an execution part is not concerned after direct output, and in an automatic control system, the traditional technical method causes that some application occasions have no feedback on the execution result of an important execution part, the power supply time sequence is not processed when power is supplied or discharged, and meanwhile, the power supply of the execution part is not monitored, so that the problem of incomplete control exists; these problems may cause the executing part to malfunction, the executing part to fail but the control system to output, etc., which may further cause damage to the equipment and products and even bring unpredictable personal safety problems. Therefore, the control circuit in the prior art method has a problem of an imperfect control function.
Disclosure of Invention
The embodiment of the invention provides an integrated control circuit with feedback and signal blocking reset functions, aiming at solving the problem of incomplete control function of a control circuit in the prior art.
In a first aspect, an embodiment of the present invention provides an integrated control circuit having functions of feedback and signal lock-out reset, where the integrated control circuit is connected to a controller to receive a control signal of the controller and output a corresponding control output signal, where the integrated control circuit includes a signal control circuit, a signal output circuit, a lock-out and signal latch circuit, a power supply monitoring circuit, and a signal feedback circuit; the control signal end of the controller is respectively connected with the control input end of the signal control circuit and the first signal input end of the locking and signal latching circuit; the feedback input end of the signal control circuit is connected with the feedback signal output end of the locking and signal latching circuit; the signal control circuit is used for receiving a control signal input by the control signal end and a feedback signal input by the feedback input end and outputting a corresponding driving control signal; the control signal output end of the signal control circuit is connected with the control input end of the signal output circuit, and the control output end of the signal output circuit is used for outputting a corresponding control output signal according to a driving control signal input by the control input end; the input end of the power supply monitoring circuit is connected with a monitoring power supply to obtain a monitoring voltage value of the monitoring power supply; the connection end of the power supply monitoring circuit is connected with the primary side output end of a first isolation optocoupler in the signal feedback circuit, the primary side input end of the first isolation optocoupler is connected with a fault signal end, the secondary side input end of the first isolation optocoupler is connected with a voltage-stabilized power supply, and the secondary side output end of the first isolation optocoupler is connected with a second signal input end of the locking and signal latching circuit; the first isolation optocoupler outputs a monitoring feedback signal to the blocking and signal latching circuit from the secondary side output end according to a fault feedback signal input by the fault signal end and a monitoring signal of the power monitoring circuit, and the blocking and signal latching circuit outputs a corresponding feedback signal to the feedback input end of the signal control circuit according to the monitoring feedback signal and a control signal input by the control signal end.
The integrated control circuit with the functions of feedback and signal blocking and resetting is characterized in that the signal control circuit comprises a first resistor, a first capacitor and an AND gate; a first input end of the AND gate is used as a control input end of the signal control circuit, a second input end of the AND gate is used as a feedback input end of the signal control circuit, and an output end of the AND gate is used as a control signal output end of the signal control circuit; the control input end is simultaneously connected with a control signal end of the controller, a first signal input end of the locking and signal latching circuit, one end of the first resistor and one end of the first capacitor; the other end of the first resistor is connected with a control signal end of the controller, and the other end of the first capacitor is grounded.
The integrated control circuit with the functions of feedback and signal blocking and resetting is characterized in that the signal output circuit comprises a second resistor, a third resistor, a fifth resistor, a second isolation optocoupler, a second capacitor and a third capacitor; one end of the second resistor is used as a control input end of a signal output circuit and is connected with a control signal output end of the signal control circuit, the other end of the second resistor is simultaneously connected with one end of a third resistor, one end of a second capacitor and a primary side input end of the second isolation optocoupler, and the other end of the third resistor is connected with the other end of the second capacitor and the primary side output end of the second isolation optocoupler and is grounded; the secondary side input end of the second isolation optocoupler is simultaneously connected with the monitoring power supply and one end of a fifth resistor, and the other end of the fifth resistor is connected with one end of the third capacitor to serve as the control output end of the signal output circuit; and the secondary output end of the second isolation optocoupler and the other end of the third capacitor are both grounded.
The integrated control circuit with the functions of feedback and signal blocking and resetting is characterized in that a pull-up resistor is further connected in series between the secondary side input end of the second isolation optocoupler and the monitoring power supply.
The integrated control circuit with the feedback and signal locking reset function is characterized in that the locking and signal latching circuit comprises a fourth capacitor, a sixth resistor and a trigger; the first input end of the trigger is used as the first signal input end of the blockade and signal latch circuit, the second input end of the trigger is used as the second signal input end of the blockade and signal latch circuit, the third input end of the trigger is grounded, and the fourth input end of the trigger is connected with the stabilized voltage supply; the output end of the trigger is connected with one end of the sixth resistor, the other end of the sixth resistor is connected with one end of the fourth capacitor and serves as the feedback signal output end of the blocking and signal latching circuit, and the other end of the fourth capacitor is grounded.
The integrated control circuit with the feedback and signal blocking reset functions is characterized in that the trigger is a D trigger with the presetting and zero clearing functions.
The integrated control circuit with the functions of feedback and signal locking and resetting is characterized in that the signal feedback circuit further comprises an eighth resistor; and the primary side input end of the first isolation optocoupler is connected with the fault signal end input through the eighth resistor.
The integrated control circuit with the functions of feedback and signal blocking and resetting is characterized in that the power supply monitoring circuit comprises a ninth resistor, a tenth resistor, an eleventh resistor and a reference voltage chip; a first input end of the reference voltage chip is connected with one end of the eleventh resistor and is grounded, and a second input end of the reference voltage chip is simultaneously connected with the other end of the eleventh resistor and one end of the tenth resistor; one end of the tenth resistor is connected with one end of the ninth resistor and the monitoring power supply, and the other end of the ninth resistor is connected with the output end of the reference voltage chip and serves as the connecting end of the power supply monitoring circuit.
The integrated control circuit with the feedback and signal blocking reset functions comprises a first isolation optocoupler, a second isolation optocoupler, a first pull-down resistor, a second pull-down resistor, a first isolation optocoupler and a second isolation optocoupler, wherein the first isolation optocoupler is connected with the second isolation optocoupler in a grounded mode.
The integrated control circuit with the functions of feedback and signal blocking and resetting is characterized in that the reference voltage chip is a programmable reference voltage chip.
The embodiment of the invention provides an integrated control circuit with feedback and signal blocking reset functions, which comprises a signal control circuit, a signal output circuit, a blocking and signal latching circuit, a power supply monitoring circuit and a signal feedback circuit. According to the integrated control circuit, the power monitoring circuit monitors the detection power supply to obtain the monitoring signal, the first isolation optocoupler is used for combining the fault feedback signal with the monitoring signal and outputting the monitoring feedback signal to the blocking and signal latching circuit, the blocking and signal latching circuit outputs the feedback signal to the signal control circuit, meanwhile, the output blocking and latching of the driving control signal are realized, and the driving control signal can be normally output only after the fault feedback signal is reset. The integrated control circuit can ensure that the control output signal can not be directly and wrongly output according to the control signal under abnormal conditions such as power-on and power-off abnormity, power supply abnormity and the like, so that the integrated control circuit has a perfect function of safety guarantee, and the reliability and the safety of controlling an external actuating mechanism through the integrated control circuit are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a circuit diagram of an integrated control circuit with feedback and signal lock-out reset functions according to an embodiment of 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 some, not all, embodiments of the present invention. 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.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
Referring to fig. 1, fig. 1 is a circuit diagram of an integrated control circuit with feedback and signal lock reset functions according to an embodiment of the present invention. As shown in the figure, an integrated control circuit with feedback and signal blocking reset functions is connected with a controller to receive a control signal of the controller and output a corresponding control output signal, wherein the integrated control circuit comprises a signal control circuit 1, a signal output circuit 2, a blocking and signal latch circuit 3, a power supply monitoring circuit 4 and a signal feedback circuit 5; a control signal end mCRL of the controller is respectively connected with a control input end of the signal control circuit 1 and a first signal input end of the locking and signal latching circuit 3; the feedback input end of the signal control circuit 1 is connected with the feedback signal output end Q' of the locking and signal latching circuit 3; the signal control circuit 1 is used for receiving a control signal input by a control signal end and a feedback signal input by a feedback input end and outputting a corresponding driving control signal; a control signal output end of the signal control circuit 1 is connected with a control input end of the signal output circuit 2, and a control output end CTRL of the signal output circuit 2 is used for outputting a corresponding control output signal according to a driving control signal input by the control input end; the input end of the power supply monitoring circuit 4 is connected with a monitoring power supply VCC so as to obtain a monitoring voltage value of the monitoring power supply VCC; the connection end of the power supply monitoring circuit 4 is connected with the primary side output end of a first isolation optocoupler U4 in the signal feedback circuit 5, the primary side input end of the first isolation optocoupler U4 is connected with a fault signal end FB, the secondary side input end of the first isolation optocoupler U4 is connected with a regulated power supply VDD, and the secondary side output end is connected with the second signal input end of the blocking and signal latching circuit 3; the first isolation optocoupler U4 outputs a monitoring feedback signal to the blocking and signal latching circuit 3 from a secondary output end according to a fault feedback signal input by a fault signal end and a monitoring signal of the power monitoring circuit 4, and the blocking and signal latching circuit 3 outputs a corresponding feedback signal to a feedback input end of the signal control circuit 1 according to the monitoring feedback signal and a control signal input by a control signal end.
Specifically, the controller may be an MCU control chip, the signal control circuit 1 receives a control signal of the MCU control chip and a feedback signal of the blocking and signal latch circuit 3, the output of the signal output circuit 2 is controlled by the states of the two signals, the monitoring feedback signals of the power monitoring circuit 4 and the signal feedback circuit 5 are output to the blocking and signal latch circuit 3, the blocking and signal latch circuit 3 outputs a feedback signal to the signal control circuit 1 according to the monitoring feedback signal, when the level inversion occurs in the monitoring feedback signal, the feedback signal output by the blocking and signal latch circuit 3 is inverted, and the signal can be fed back to the MCU control chip through the feedback output end mFB of the blocking and signal latch circuit 3, and simultaneously the level of the driving control signal output by the signal control circuit 1 is inverted, so as to achieve the purpose of rapidly blocking the control signal input by the MCU control chip, under the condition that the monitoring feedback signal fed back by the signal feedback circuit 5 always indicates that a fault exists, the control signal of the MCU control chip is invalid, the control signal cannot control the signal output circuit 2 to output a corresponding control output signal, and when the monitoring feedback signal fed back by the signal feedback circuit 5 indicates that no fault exists, only the rising edge of the control signal sent by the MCU control chip enables the feedback signal level output by the locking and signal latching circuit 3 to be reversed, so that the signal control circuit 1 can normally output a driving control signal, the control output signal can not be directly and wrongly output according to the control signal under the abnormal conditions of power-on and power-off abnormality, and the like, and the output control of the integrated control circuit is more reliable.
In a more specific embodiment, the signal control circuit 1 includes a first resistor R1, a first capacitor C1, and an and gate U1; a first input end a of the and gate U1 is used as a control input end of the signal control circuit 1, a second input end B thereof is used as a feedback input end of the signal control circuit 1, and an output end Y thereof is used as a control signal output end of the signal control circuit 1; the control input end is connected with a control signal end of the controller, a first signal input end of the blocking and signal latching circuit 3, one end of the first resistor R1 and one end of the first capacitor C1 at the same time; the other end of the first resistor R1 is connected with a control signal end of the controller, and the other end of the first capacitor C1 is grounded.
In a more specific embodiment, the signal output circuit 2 includes a second resistor R2, a third resistor R3, a fifth resistor R5, a second isolation optocoupler U2, a second capacitor C2, and a third capacitor C3; one end of the second resistor R2 is used as a control input end of a signal output circuit 2 and is connected with a control signal output end of the signal control circuit 1, the other end of the second resistor R2 is simultaneously connected with one end of the third resistor R3, one end of the second capacitor C2 and a primary side input end of the second isolation optocoupler U2, and the other end of the third resistor R3 is connected with the other end of the second capacitor C2 and a primary side output end of the second isolation optocoupler U2 and is grounded; an auxiliary side input end of the second isolation optocoupler U2 is connected to the monitoring power supply VCC and one end of a fifth resistor R5, and the other end of the fifth resistor R5 is connected to one end of the third capacitor C3 to be used as a control output end CTRL of the signal output circuit 2; and the secondary output end of the second isolation optocoupler U2 and the other end of the third capacitor C3 are both grounded. Specifically, a pull-up resistor R4 is further connected in series between the secondary input end of the second isolation optocoupler U2 and the monitoring power VCC. By setting the filter parameters of the fifth resistor R5 and the fourth capacitor C4, the delay time between the output control output signal and the control signal can be controlled.
In a more specific embodiment, the blocking and signal latching circuit 3 includes a fourth capacitor C4, a sixth resistor R6, and a flip-flop U3; a first input end C of the flip-flop U3 serves as a first signal input end of the lockout and signal latch circuit 3, a second input end S thereof serves as a second signal input end of the lockout and signal latch circuit 3, a third input end D thereof is grounded, and a fourth input end R thereof is connected with the regulated power supply VDD; the output end of the flip-flop U3 is connected to one end of the sixth resistor R6, the other end of the sixth resistor R6 is connected to one end of the fourth capacitor C4, and is used as the feedback signal output end Q' of the blocking and signal latching circuit 3, and the other end of the fourth capacitor C4 is grounded. Specifically, the flip-flop U3 is a D flip-flop U3 having preset and clear functions. Wherein, the signal feedback circuit 5 further comprises an eighth resistor R8; the primary side input end of the first isolation optocoupler U4 is connected with the fault signal end input through the eighth resistor R8.
In a more specific embodiment, the power monitoring circuit 4 includes a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11 and a reference voltage chip U5; a first input end of the reference voltage chip U5 is connected to one end of the eleventh resistor R11 and grounded, and a second input end of the reference voltage chip U5 is connected to the other end of the eleventh resistor R11 and one end of the tenth resistor R10; one end of the tenth resistor R10 is connected to one end of the ninth resistor R9 and the monitoring power VCC, and the other end of the ninth resistor R9 is connected to the output end of the reference voltage chip U5 and serves as the connection end of the power monitoring circuit 4. Specifically, the signal feedback circuit 5 further includes a pull-down resistor R7, and the secondary output terminal of the first isolation optocoupler U4 is connected to ground through the pull-down resistor R7. The reference voltage chip U5 is a programmable reference voltage chip.
The specific working principle of the integrated control circuit in the application is as follows:
when the circuit normally works, a fault feedback signal of a fault signal end FB is at a high level H, current flows through a primary side of a first isolation optocoupler U4 under the condition that a monitoring power supply VCC is normally electrified, a secondary side of the first isolation optocoupler U4 is conducted to enable an S input pin of a D trigger U3 to be at the high level H, a control signal output by a control signal end mTRL of an MCU control chip is converted into the high level H from a low level L, and after a first input end C of the D trigger U3 detects a rising edge, a feedback signal output by a feedback signal output end Q' is changed into H (see a serial number 2 in a table 1), when the first input end a and the second input end B of the and gate U1 are both at high level, the output driving control signal is also at high level, at this time, the primary side of the second isolation optocoupler U2 flows current, the secondary side of the second isolation optocoupler U2 is turned on, and the output of the second isolation optocoupler U2 is changed from high level H to low level L, so that the purpose of outputting the control output signal is realized.
The state transition table of D flip-flop U3 during operation of the integrated control circuit is shown in table 1.
TABLE 1
Wherein H is high level output, L is low level output, X is no level output, ↓ is rising, and ↓ is falling.
When power is just powered on, under the condition that the power-on time sequence of the voltage-stabilized power supply VDD and the monitoring power supply VCC cannot be ensured, if the VDD is powered on first, due to the existence of the power supply monitoring circuit 4, when the voltage of the monitoring power supply VCC does not reach a set value, the monitoring feedback signal of the second input end S of the D flip-flop U3 is at a low level L, no matter the control signal output by the control signal end mCTRL is H or L, the and gate U1 cannot output a driving control signal of a high level H, the optocoupler U2 does not work, and the control output signal output by the control output end CTRL is kept at the high level H. If VCC is powered up first, VDD is still powered up, at this time, the control signal output by the control signal terminal mCTRL is at a determined low level L, the driving control signal output by the and gate U1 is at a low level L, the optocoupler U2 does not operate, and the control output signal output by the control output terminal CTRL is kept at a high level H. Therefore, the situation that misoperation occurs due to the reason of the power-on time sequence in the power-on process is avoided.
In the working process, an external execution mechanism breaks down, a controlled end of the external execution mechanism inputs a fault signal through a fault signal end FB, at the moment, a fault feedback signal becomes a low level L, or the abnormal power failure of a monitoring power supply VCC is caused, no current flows through a primary side of a first isolation optocoupler U4, a secondary side of the first isolation optocoupler U4 is not conducted, a second input end S of a D trigger U3 becomes a low level L, and the state is a state 1 in a table 1; the feedback signal output by the feedback signal output end Q' is changed into low level L, the feedback signal is fed back to the MCU control chip through the feedback output end mFB, the feedback signal input by the second input end B of the AND gate U1 is low level L, the drive control signal output by the output end Y of the AND gate U1 is low level L, the second isolation optocoupler U2 does not work, the control output signal output by the control output end CTRL is changed into high level H from low level L, at the moment, the control signal input by the MCU control chip is rapidly blocked, and the control signal is invalid.
When the fault is relieved, the fault feedback signal changes into a high level L, or the power supply recovers to a normal voltage value, the feedback signal output by the Q 'is still a low level L, only when the control signal output by the control signal end mTRL changes from the low level L to the high level H again, the rising edge can enable the feedback signal output end Q' to change into a high level H (see table 1 state 2), at the moment, the first input end A and the second input end B of the AND gate U1 are both high level H, the driving control signal output by the AND gate U1 is the high level H, the primary side of the second isolation optocoupler U2 has current flowing through, the secondary CTRL side of the second isolation optocoupler U2 is conducted, the control output signal output by the control output end changes from the high level H to the low level L, the corresponding control output signal is output through the control signal, and the control signal is effective. At the moment, after the controlled external execution mechanism fails or the monitoring power supply VCC is abnormally powered down, the fault signal is latched and the output signal of the MCU control chip is blocked, and the control output signal corresponding to the control signal can be normally output only by resetting after the fault is recovered to be normal, so that the safety and the reliability are greatly improved.
The integrated control circuit with the feedback and signal blocking reset functions in the embodiment can be used for automatic control of wind power generation equipment, such as automatic control of a large-scale wind driven generator.
The integrated control circuit with the feedback and signal blocking reset function provided by the embodiment of the invention comprises a signal control circuit, a signal output circuit, a blocking and signal latching circuit, a power supply monitoring circuit and a signal feedback circuit. According to the integrated control circuit, the power monitoring circuit is used for monitoring the detection power supply to obtain the monitoring signal, the first isolation optocoupler is used for combining the fault feedback signal with the monitoring signal and outputting the monitoring feedback signal to the blocking and signal latching circuit, the blocking and signal latching circuit is used for outputting the feedback signal to the signal control circuit, meanwhile, the output blocking and latching of the driving control signal are realized, and the driving control signal can be normally output only after the fault feedback signal is reset. The integrated control circuit can ensure that the control output signal can not be directly and wrongly output according to the control signal under abnormal conditions such as power-on and power-off abnormity, power supply abnormity and the like, so that the integrated control circuit has a perfect function of safety guarantee, and the reliability and the safety of controlling an external actuating mechanism through the integrated control circuit are improved.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An integrated control circuit with feedback and signal blocking reset functions is connected with a controller to receive a control signal of the controller and output a corresponding control output signal, and is characterized in that the integrated control circuit comprises a signal control circuit, a signal output circuit, a blocking and signal latching circuit, a power supply monitoring circuit and a signal feedback circuit;
the control signal end of the controller is respectively connected with the control input end of the signal control circuit and the first signal input end of the locking and signal latching circuit;
the feedback input end of the signal control circuit is connected with the feedback signal output end of the locking and signal latching circuit; the signal control circuit is used for receiving a control signal input by the control signal end and a feedback signal input by the feedback input end and outputting a corresponding driving control signal;
the control signal output end of the signal control circuit is connected with the control input end of the signal output circuit, and the control output end of the signal output circuit is used for outputting a corresponding control output signal according to a driving control signal input by the control input end;
the input end of the power supply monitoring circuit is connected with a monitoring power supply to obtain a monitoring voltage value of the monitoring power supply; the connection end of the power supply monitoring circuit is connected with the primary side output end of a first isolation optocoupler in the signal feedback circuit, the primary side input end of the first isolation optocoupler is connected with a fault signal end, the secondary side input end of the first isolation optocoupler is connected with a voltage-stabilized power supply, and the secondary side output end of the first isolation optocoupler is connected with a second signal input end of the locking and signal latching circuit;
the first isolation optocoupler outputs a monitoring feedback signal to the blocking and signal latching circuit from the secondary side output end according to a fault feedback signal input by the fault signal end and a monitoring signal of the power monitoring circuit, and the blocking and signal latching circuit outputs a corresponding feedback signal to the feedback input end of the signal control circuit according to the monitoring feedback signal and a control signal input by the control signal end.
2. The integrated control circuit with the functions of feedback and signal lock-out reset as claimed in claim 1, wherein the signal control circuit comprises a first resistor, a first capacitor and an and gate;
a first input end of the AND gate is used as a control input end of the signal control circuit, a second input end of the AND gate is used as a feedback input end of the signal control circuit, and an output end of the AND gate is used as a control signal output end of the signal control circuit;
the control input end is simultaneously connected with a control signal end of the controller, a first signal input end of the locking and signal latching circuit, one end of the first resistor and one end of the first capacitor; the other end of the first resistor is connected with a control signal end of the controller, and the other end of the first capacitor is grounded.
3. The integrated control circuit with the functions of feedback and signal blocking reset according to claim 1, wherein the signal output circuit comprises a second resistor, a third resistor, a fifth resistor, a second isolation optocoupler, a second capacitor and a third capacitor;
one end of the second resistor is used as a control input end of a signal output circuit and is connected with a control signal output end of the signal control circuit, the other end of the second resistor is simultaneously connected with one end of a third resistor, one end of a second capacitor and a primary side input end of the second isolation optocoupler, and the other end of the third resistor is connected with the other end of the second capacitor and the primary side output end of the second isolation optocoupler and is grounded;
the secondary side input end of the second isolation optocoupler is simultaneously connected with the monitoring power supply and one end of a fifth resistor, and the other end of the fifth resistor is connected with one end of the third capacitor to serve as the control output end of the signal output circuit; and the secondary output end of the second isolation optocoupler and the other end of the third capacitor are both grounded.
4. The integrated control circuit with the functions of feedback and signal blocking reset as claimed in claim 3, wherein a pull-up resistor is further connected in series between the secondary input end of the second isolating optocoupler and the monitoring power supply.
5. The integrated control circuit with feedback and signal lockout reset function of claim 1, wherein the lockout and signal latch circuit comprises a fourth capacitor, a sixth resistor and a flip-flop;
the first input end of the trigger is used as the first signal input end of the blocking and signal latching circuit, the second input end of the trigger is used as the second signal input end of the blocking and signal latching circuit, the third input end of the trigger is grounded, and the fourth input end of the trigger is connected with the voltage-stabilized power supply;
the output end of the trigger is connected with one end of the sixth resistor, the other end of the sixth resistor is connected with one end of the fourth capacitor and serves as the feedback signal output end of the blocking and signal latching circuit, and the other end of the fourth capacitor is grounded.
6. The integrated control circuit with feedback and signal lock-out reset functions as claimed in claim 5, wherein the flip-flop is a D flip-flop with preset and clear functions.
7. The integrated control circuit with feedback and signal lock-out reset functions as claimed in claim 1, wherein the signal feedback circuit further comprises an eighth resistor;
and the primary side input end of the first isolation optocoupler is connected with the fault signal end input through the eighth resistor.
8. The integrated control circuit with the functions of feedback and signal lock-out reset as claimed in claim 7, wherein the power monitoring circuit comprises a ninth resistor, a tenth resistor, an eleventh resistor and a reference voltage chip;
a first input end of the reference voltage chip is connected with one end of the eleventh resistor and is grounded, and a second input end of the reference voltage chip is simultaneously connected with the other end of the eleventh resistor and one end of the tenth resistor; one end of the tenth resistor is connected with one end of the ninth resistor and the monitoring power supply, and the other end of the ninth resistor is connected with the output end of the reference voltage chip and serves as a connecting end of the power supply monitoring circuit.
9. The integrated control circuit with feedback and signal blocking reset functions as claimed in claim 7, wherein the signal feedback circuit further comprises a pull-down resistor, and the secondary output terminal of the first isolation optocoupler is connected to ground through the pull-down resistor.
10. The integrated control circuit with feedback and signal lock out reset functions of claim 8, wherein the reference voltage chip is a programmable reference voltage chip.
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| CN116388747A (en) * | 2023-04-23 | 2023-07-04 | 上海合时安防技术有限公司 | Isolation explosion-proof circuit for driving and signal detection |
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| CN114625059B (en) | 2022-07-22 |
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