CN113933693B - Detection circuit suitable for multiple types of opening and closing quantities and control method - Google Patents
Detection circuit suitable for multiple types of opening and closing quantities and control method Download PDFInfo
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- CN113933693B CN113933693B CN202111145224.8A CN202111145224A CN113933693B CN 113933693 B CN113933693 B CN 113933693B CN 202111145224 A CN202111145224 A CN 202111145224A CN 113933693 B CN113933693 B CN 113933693B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
Abstract
The invention discloses a detection circuit and a control method suitable for multiple types of input, wherein the detection circuit comprises a manual-automatic integrated control conversion module, a high-efficiency rectification module, a switching signal conditioning comprehensive module and an isolation protection indication module which are connected in sequence; the manual-automatic control conversion module comprises an MCU control PORT, a manual button control PORT, a control module, a conversion module, a mode switching auxiliary power module, a PORT A, a PORT B and a signal access path conversion module; the high-efficiency rectification module comprises a PWM control signal and is connected with the high-efficiency rectification circuit; the switch signal conditioning comprehensive module comprises a clamping voltage-stabilizing current-limiting protection circuit, a voltage-dividing sampling circuit, a switch conditioning signal circuit and a comparison circuit; the isolation protection indication module comprises a remote signaling state shift indication, voltage stabilization, isolation protection and DI output. The invention can be used for assisting a complete tool fixture, greatly improves the efficiency of a detection system, realizes the integrated design of the detection table body of various products, and enriches the functional characteristics of the detection table body in the aspect.
Description
Technical Field
The invention relates to the technical field of distribution and utilization automation technology and an automatic detection platform, in particular to a detection circuit and a control method suitable for multiple types of input quantity.
Background
The distribution electricity automatic detection platform is mainly used for detecting line faults and states of switches in distribution lines, and the distribution electricity switch on-off states are controlled according to automatic parameter requirements. The method for realizing the power distribution and utilization switch and the operating mechanism are different, the operating voltage is also various, and the state output of the switch such as switching is consistent with the operating voltage, so that the power distribution terminal is required to detect the state quantity of switching, locking, energy storage and the like of the switches with different voltage types and different voltage grades. In the design of the distribution and utilization automatic terminal, remote signaling is the input of state quantity, which is one of the three-remote functions of the secondary terminal equipment, and one of the basic functions of the distribution and utilization automatic terminal is to collect and send state quantity information such as switch action, operation locking, energy storage in place and the like, and to request state shift to be transmitted preferentially, and only the passive empty contact access mode is considered for the state quantity represented by mechanical contact closing and opening; in the power distribution terminal, the traditional circuit design of the remote signaling input loop is to separately design alternating current and direct current input signals, the power distribution terminals of different remote signaling input circuits are selected by power distribution switches with different voltage types and voltage grades, the requirements are different, different types of power distribution terminal equipment are generated, the traditional switching-in amount detection is not provided with multiple types of self-adaptive detection and mode switching functions, and the permanent magnet switch single-coil and double-coil switching-on/off signals, especially single-coil positive/negative direct current power supply switching amount detection is realized.
Disclosure of Invention
The invention provides a detection circuit and a control method suitable for multiple types of input and can solve the technical problems.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a detection circuit suitable for multiple types of opening quantity comprises a manual-automatic control conversion module, a high-efficiency rectification module, a switching signal conditioning comprehensive module and an isolation protection indication module which are connected in sequence;
the manual-automatic control conversion module comprises: MCU control PORT PORT, manual button control PORT, control module, conversion module, auxiliary power module for mode switching, PORT A, PORT B and signal access path conversion module; the manual button control PORT, the control module and the conversion module are sequentially connected, the MCU control PORT is connected with the control module, the mode switching auxiliary power supply module is connected with the conversion module, and the PORT A and the PORT B are respectively connected with the signal access path conversion module;
the efficient rectifying module comprises: the PWM control signal is connected with the high-efficiency rectifying circuit;
the switching signal conditioning integrated module comprises: the device comprises a clamping voltage-stabilizing current-limiting protection circuit, a voltage-dividing sampling and switching conditioning signal circuit and a comparison circuit; the clamping voltage-stabilizing current-limiting protection circuit is respectively connected with the voltage-dividing sampling and switching conditioning signal circuit, and the voltage-dividing sampling and switching conditioning signal circuit is also respectively connected with the comparison circuit;
the isolation protection indication module comprises: remote signaling state shift indication, voltage stabilization, isolation protection and DI output; the remote signaling state shift indication and the voltage stabilization are respectively connected with an isolation protection, and the isolation protection is connected with the DI output.
Further, the circuit of the manual-automatic control conversion module consists of a resistor R1, a resistor R2, a diode D1, a diode D2, a diode D3, a diode D4, a diode D7, a diode D8, a diode D11, a voltage stabilizing tube Z4, a relay JK1, a relay JK2 and an isolation optocoupler U1;
wherein, control power VCC1 links to each other with relay power control opto-coupler U1's positive pole through resistance R2, opto-coupler negative pole connects control PORT, opto-coupler U1 collecting electrode connects relay solenoid power VCC0 again through the projecting pole divide two ways: one path goes to the positive electrode of a diode D3, the negative electrode of the diode D3 is connected with the positive electrode of a relay JK1 coil, the negative electrode of the relay coil is grounded, and a diode D2 is reversely connected on the relay coil in parallel to form a follow current diode; the second path is connected to the positive electrode of a diode D4, the negative electrode of the diode D4 is connected with the positive electrode of a relay JK1 coil, the negative electrode of the relay coil is grounded, and a diode D8 is reversely connected on the relay coil in parallel to form a follow current diode; the auxiliary power supply VCC is connected with the anode of a diode D1 through a resistor R1, the cathode of the diode D1 is connected with two groups of switching intermediate contacts of a relay JK1, and the normally closed switches of the two groups of switching of the relay JK1 are connected with the cathode of a voltage stabilizing tube Z4; the port A is a normally closed switch directly connected to two groups of transfer switches of the relay JK2, the port A is a normally closed switch connected to the positive electrode of the diode D7, the negative electrode of the diode D7 is normally open connected to the two groups of transfer switches of the relay JK2, the pin 3 of the middle contact of the relay JK2 is connected to the negative electrode of the voltage stabilizing tube Z4, and the positive electrode of the voltage stabilizing tube Z4 is transmitted to the next stage; the port B is directly connected to normally closed switches of two groups of transfer switches of the relay JK2, the port B is connected to the cathode of the diode D11, the anode of the diode D11 is normally opened to the two groups of transfer switches of the relay JK2, and the pin 6 of the middle contact of the relay JK2 is supplied to the next stage.
Further, the high-efficiency rectifying module comprises a positive electrode of a voltage stabilizing diode Z4 connected to a cathode of a fast rectifying diode D5, and is simultaneously connected with a positive electrode of a fast rectifying diode D9, a positive electrode of the fast rectifying diode D5, a grid electrode G of a MOS tube Q2 is connected with a PWM1 signal of an MCU, a drain electrode D of the MOS tube Q2 is connected to a negative electrode of the D5, a source electrode S of the MOS tube Q2 is connected to a positive electrode of the D5 and is connected to a positive electrode of a fast rectifying diode D10, a negative electrode of the fast rectifying diode D10 and a positive electrode of a fast rectifying diode D12 are simultaneously connected to a middle contact 6 pin of a relay JK2, and a negative electrode of the fast rectifying diode D9 and a negative electrode of the fast rectifying diode D12 are simultaneously input to a current limiting resistor R10 of the next stage; the positive pole of the fast rectifying diode D5 and the positive pole of the fast rectifying diode D10, the drain electrode D of the MOS tube Q3 is connected to the negative pole of the diode D10, the grid electrode G of the MOS tube Q3 is connected with the PWM2 signal of the MCU, the source electrode S of the MOS tube Q3 is connected to the positive pole of the diode D10, and meanwhile, the signal is transmitted to the next stage.
Further, the switching signal conditioning integrated module comprises an auxiliary power supply VCC, is connected with the same directional end of the comparator U3A through a resistor R3, is connected with a resistor R5 in parallel, is connected with a resistor R6 to the opposite directional end of the comparator U3A, is connected with a resistor R6 in parallel, is connected with a diode D6 in parallel, is connected with the opposite directional end of the comparator U3A at the positive pole of the diode D6, is connected with the negative pole of the voltage regulator Z3, is connected with the positive pole of the voltage regulator Z3 to the ground, is connected with the two ends of the voltage regulator Z3 in parallel, is connected with a collector C of the NPN triode Q1 through a capacitor C3 in parallel, is connected with the opposite directional end of the comparator U3A through a power-type current limiting resistor R10, is connected with an emitter E of the NPN triode Q1 in parallel, is connected with a base B and an emitter E of the NPN triode Q1 in parallel, is connected with a base B of the NPN triode Q1 in parallel, is connected with the negative pole R9 to the output end of the comparator to the next current limiting resistor R7.
Further, the isolation protection indication module comprises an auxiliary power supply VCC connected with an anode of the light emitting diode LED1, a cathode of the light emitting diode LED1 connected with a cathode of the voltage stabilizing diode Z1, an anode of the voltage stabilizing diode Z1 connected with an anode of the optocoupler U2, a cathode of the optocoupler U2 connected with the current limiting resistor R7, an MCU side power supply VCC1 connected with a collector of the optocoupler U2 through the pull-up resistor R4, an emitter of the optocoupler U2 grounded, and DI output from a 4 pin of the optocoupler U2 to the MCU.
On the other hand, the invention also discloses a control method of the detection circuit, which is based on the detection circuit applicable to the multi-type opening amount and comprises the following steps:
the signal flows in from the PORT A, the PORT B, a switching instruction is sent to the MCU through the upper computer software to control the PORT or manually control the PORT, the control module is enabled to take effect to control the conversion module, the signal switching of the auxiliary power module is selected to be switched in or out, the AC, DC and passive dry node modes are met when the signal switching is switched in, the DC fixed polarity mode and the permanent magnet switch test mode are not met when the signal switching is switched in, the normally closed switch channel of the signal switching path conversion module, namely the AC, DC and passive dry node modes, is matched with the normally open switch channel, namely the DC fixed polarity mode and the permanent magnet switch test mode, then the signal switching path conversion module passes through the high-efficiency rectifying circuit which is combined by the PWM control MOS and the diode, the output signal passes through the embedded voltage stabilizing and current limiting protection circuit, the switch conditioning signal circuit generates the signal and the partial pressure sampling signal to be output through the comparison circuit to be indicated by the isolation protection circuit and the DI output to be detected by the MCU, and the whole flow is completed
According to the technical scheme, the invention is applicable to multiple types of switching-in quantity detection circuits, and particularly relates to an electric distribution device and a corresponding control method, an alternating current-direct current input voltage self-adaption remote signaling circuit, a relay protection circuit, a detection platform, an alternating current-direct current self-adaption circuit, a switch closing short circuit signal and a permanent magnet switch opening and closing coil detection circuit. The invention provides an alternating current-direct current input voltage self-adaptive remote signaling circuit for a power distribution and utilization device, which is designed with active passive self-adaptation, switchable modes and multi-mode compatibility, and aims to solve the problem of poor adaptability of a traditional remote signaling input circuit in the prior art, realize the application of detecting the switching-in quantity of the alternating current-direct current self-adaptive switching-in quantity, which is adaptive to different voltage types, different voltage grades, different types and multi-functional circuits, can realize the active passive switching-in quantity, can realize the fixed polarity test through the mode switching, can also multiplex the use of matched positive and negative wiring, and test the action polarity of the switching-in quantity, such as the application of detecting the switching-in quantity of a permanent magnet switch switching-on/off coil voltage signal.
The invention provides an alternating-current/direct-current input voltage self-adaptive remote signaling circuit for a power distribution and utilization device, which has the advantages of strong adaptability, high flexibility of circuit modes, capability of switching through software sending instructions, capability of switching modes manually, safety in system monitoring, high stability, high-efficiency circuit rectifying part, high efficiency, flexible PWM control switching, adjustable duty ratio, voltage stabilization, clamping and power resistance current limiting of a protection circuit, quick response output of a comparison circuit, small delay, adjustable parameters, flexible circuit, safety and reliability of a photoelectric isolation circuit, capability of visually seeing displacement conditions through hardware circuit indication, and capability of visually transmitting MCU software discrimination, double verification, accuracy and intuitiveness.
The default mode of this design is: the method comprises the steps of enabling a single-coil permanent magnet switch to be supported in an active and passive alternating-current/direct-current self-adaptive mode after a switching mode is executed, enabling a permanent magnet switch signal to be divided into positive and negative directions and connected to a two-way opening detection circuit by the detection method, enabling a positive and negative direct-current voltage switch signal to be changed into a detection signal, enabling each coil to correspond to one-way opening detection circuit without crossing and doubling for the double-coil permanent magnet switch, and directly detecting a deflection signal.
The design module can be used on an automatic detection platform to assist a complete tool fixture, so that the efficiency of a detection system is greatly improved, the integrated design of detection platforms of various products is realized, and the functional characteristics of the detection platforms in the aspect are enriched.
Drawings
FIG. 1 is a block diagram of the structure of the present invention;
FIG. 2 is a workflow diagram of the present invention;
FIG. 3 is a schematic circuit diagram of the present invention;
FIG. 4 is a circuit diagram of an automated manual control conversion module according to the present invention;
FIG. 5 is a circuit diagram of a high efficiency rectifier module of the present invention;
FIG. 6 is a circuit diagram of a switching signal conditioning integrated module of the present invention;
fig. 7 is a circuit diagram of an isolation protection indication module of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention.
As shown in fig. 1, the applicable multi-type opening amount detection circuit according to the present embodiment includes four parts:
the first part is an automated manual control conversion module comprising: the MCU controls the PORT, the manual button controls the PORT, the control module, the conversion module, the auxiliary power module for mode switching, the PORT A, the PORT B and the signal access path conversion module; the manual button control PORT, the control module and the conversion module are sequentially connected, the MCU control PORT is connected with the control module, the mode switching auxiliary power supply module is connected with the conversion module, and the PORT A and the PORT B are respectively connected with the signal access path conversion module;
the second part is a high-efficiency rectifying module comprising: PWM control signals, high-efficiency rectification circuits; the PWM control signal is connected with the high-efficiency rectifying circuit;
the third part is a switching signal conditioning integrated module comprising: the voltage-stabilizing current-limiting protection circuit for clamping, voltage-dividing sampling, switching conditioning signal circuit and comparison circuit; the clamping voltage-stabilizing current-limiting protection circuit is respectively connected with the voltage-dividing sampling and switching conditioning signal circuit, and the voltage-dividing sampling and switching conditioning signal circuit is also respectively connected with the comparison circuit;
the fourth part comprises an isolation protection indication module comprising: remote signaling state shift indication, voltage stabilization, isolation protection and DI output; the remote signaling state shift indication and the voltage stabilization are respectively connected with an isolation protection, and the isolation protection is connected with the DI output.
In the embodiment of the invention, signals flow in from the PORTs A and B, the PORTs are controlled by MCU (micro control unit) or the PORTs are manually controlled, the control module takes effect to control the conversion module, whether the signals of the mode switching auxiliary power module are connected or not is selected, the AC, DC and passive dry node modes are met when the signals are connected, the DC fixed polarity mode and the permanent magnet switch test mode are not met, the normally closed switch channel (AC, DC and passive dry node modes) of the signal switching path conversion module is matched, the normally open switch channel (DC fixed polarity mode and permanent magnet switch test mode) is connected, the output signals are subjected to the high-efficiency rectifying circuit which is formed by combining PWM control MOS and diodes, the switch conditioning signal circuit generates signals and the partial pressure sampling signals, the signals are output by the comparison circuit and are sent to the MCU for detection through the indication of the isolation protection circuit and the DI output, and the whole flow is completed, and the circuit function module is shown in figure 1.
The following is a specific description with reference to fig. 2 and 3:
the first part manual-automatic integrated control conversion module: the opening amount port, the mode switching circuit and the control circuit part are as follows: the general function is as in the circuit of fig. 3, the circuit is composed of a resistor R1, a resistor R2, a diode D1, a diode D2, a diode D3, a diode D4, a diode D7, a diode D8, a diode D11, a voltage stabilizing tube Z4, a relay JK1, a relay JK2 and an isolation optocoupler U1;
wherein, control power VCC1 links to each other with relay power control opto-coupler U1's positive pole through resistance R2, opto-coupler negative pole connects control PORT, opto-coupler U1 collecting electrode connects relay solenoid power VCC0 again through the projecting pole divide two ways: one path goes to the positive electrode of a diode D3, the negative electrode of the diode D3 is connected with the positive electrode of a relay JK1 coil, the negative electrode of the relay coil is grounded, and a diode D2 is reversely connected on the relay coil in parallel to form a follow current diode; the second path is connected to the positive electrode of a diode D4, the negative electrode of the diode D4 is connected with the positive electrode of a relay JK1 coil, the negative electrode of the relay coil is grounded, and a diode D8 is reversely connected on the relay coil in parallel to form a follow current diode; the auxiliary power supply VCC is connected with the anode of a diode D1 through a resistor R1, the cathode of the diode D1 is connected with two groups of switching intermediate contacts of a relay JK1, and the normally closed switches of the two groups of switching of the relay JK1 are connected with the cathode of a voltage stabilizing tube Z4; the port A is a normally closed switch directly connected to two groups of transfer switches of the relay JK2, the port A is a normally closed switch connected to the positive electrode of the diode D7, the negative electrode of the diode D7 is normally open connected to the two groups of transfer switches of the relay JK2, the pin 3 of the middle contact of the relay JK2 is connected to the negative electrode of the voltage stabilizing tube Z4, and the positive electrode of the voltage stabilizing tube Z4 is transmitted to the next stage; the port B is directly connected to normally closed switches of two groups of transfer switches of the relay JK2, the port B is connected to the cathode of the diode D11, the anode of the diode D11 is normally opened to the two groups of transfer switches of the relay JK2, and the pin 6 of the middle contact of the relay JK2 is supplied to the next stage.
The control mode is as follows:
the circuit functions: the input of the switching-in quantity is accessed by a PORT A and a PORT B, in a default state, the PORT signal is suspended or high level, at the moment, the optocoupler U1 is not conducted, the VCC0 does not supply power to relay coils of the relays JK1 and JK2, the relays do not act, the relays keep an inherent state, normally closed is still in a closed state, normally open is still in a normally open state, the relays are double-pole double-throw, two normally open and two normally closed states are adopted, and then the PORT A signal and the PORT B signal directly enter the next stage through normally closed contacts of the relays, and the following stage is marked: 5. 6, preparing a base material; in the mode, the circuit supports the detection of an alternating-current/direct-current self-adaptive signal and the detection of a passive short-circuit signal, when the PORT throws to a low level, the optical coupler U1 is conducted, and the mark is marked: 1, power supply access, marking: 4, relay action, marking: 2. 3, normally closed, open and normally closed, at this time, the port A is normally connected into the diode D7, the port B is reversely connected into the diode D11, and the following stage is entered, and the mark is formed: 7. 8, the mode, direct current fixed polarity detection, only the port A is connected with positive, the port B is connected with negative, the next stage has signals, and the two paths of opening and closing quantity are matched, so that the method can be used for judging the opening and closing of the permanent magnet switch and judging the positive and negative direct current power supply by utilizing the single-phase conductivity of the diode.
The second part high-efficiency rectification module: the diode rectifier circuit portion: the general function implementation is as shown in fig. 5, and is that four fast rectifying diodes D5, D9, D10 and D12 and two groups of MOS transistors, specifically including a positive electrode of a voltage stabilizing tube Z4 connected to a cathode of the fast rectifying diode D5, and simultaneously connected to the positive electrode of the fast rectifying diode D9, a positive electrode of the fast rectifying diode D5, a gate G of the MOS transistor Q2 connected to a PWM1 signal of the MCU, a drain D of the MOS transistor Q2 connected to a negative electrode of the D5, a source S of the MOS transistor Q2 connected to a positive electrode of the D5, connected to a positive electrode of the fast rectifying diode D10, a negative electrode of the fast rectifying diode D10 and a positive electrode of the fast rectifying diode D12 connected to a pin 6 of a middle contact of the relay JK2, and a negative electrode of the fast rectifying diode D9 and a negative electrode of the fast rectifying diode D12 simultaneously input to a current limiting resistor R10 of a next stage; the positive pole of the fast rectifying diode D5 and the positive pole of the fast rectifying diode D10, the drain electrode D of the MOS tube Q3 is connected to the negative pole of the diode D10, the grid electrode G of the MOS tube Q3 is connected with the PWM2 signal of the MCU, the source electrode S of the MOS tube Q3 is connected to the positive pole of the diode D10, and meanwhile, the signal is transmitted to the next stage.
Specifically, the high-efficiency full-bridge rectifying circuits formed by controlling the 9 and 10 through PWM signals are led to flow through the rear-stage circuit from top to bottom by the D9 and D10 in the positive half cycle, and from top to bottom by the D5 and D12 in the negative half cycle, so that full-wave rectification is realized, and the circuit has the advantages that: the new technology for reducing rectifying loss by using the field effect transistor of the MOS transistor with extremely low on-state resistance is a rectifying function completed by keeping the phase of the grid voltage and the phase of the rectified voltage synchronous.
The third partial switch signal conditioning integrated module comprises an auxiliary power supply VCC, the auxiliary power supply VCC is respectively connected with the same-direction end of a comparator U3A through a resistor R3, a resistor R5 is connected in parallel with the resistor R5, the resistor R5 is respectively connected with the opposite end of the comparator U3A through a resistor R6, a clamping diode D6 is connected in parallel with the resistor R6, the positive pole of the clamping diode D6 is connected with the opposite end of the comparator U3A, the resistor R5 is connected with the negative pole of a voltage stabilizing tube Z3, the positive pole of the voltage stabilizing tube Z3 is connected to the ground, a capacitor C3 is connected in parallel with the two ends of the voltage stabilizing tube Z3, a power type current limiting resistor R10 is connected to a collector C of an NPN triode Q1, an emitter E of the NPN triode Q1 is connected to the opposite end of the comparator U3A, a bias resistor R8 is connected in parallel with a base B and an emitter E of the NPN triode Q1, and the base B of the NPN triode Q1 is connected to the output end of the comparator through a current limiting resistor R9 to be output to the next stage current limiting resistor R7.
The logic control circuit, the signal conditioning input protection and the operational amplifier comparison circuit are as shown in fig. 6, the circuit is composed of a resistor R3, a resistor R5, a resistor R7, a resistor R8, a resistor R10, a winding resistor R9, a diode D6, a voltage stabilizing tube Z3, an NPN medium-power high-VCE voltage triode, an operational comparator U3A and ceramic chip capacitors C1 and C3, and the functional logic is realized: r3 and R5 form a voltage division network and are connected with the same-direction end of the operational amplifier, and the marks are as follows: 11 C1 is a filter capacitor, and the reverse end signal of the operational amplifier is formed by a resistor R6, a diode D6, a voltage stabilizing tube Z3, a ceramic C3 to form a functional circuit for blocking, protecting and the like, and is marked with: 12, triode Q1, resistance R8, resistance R9 constitute and realize switch circuit, mark: 13, and a voltage division bias circuit, wherein the resistor R10 is a power resistor to realize a current limiting protection function;
the reference voltage of the same-direction end of the comparator forms a voltage division network V+ =VCC [ R5/(R3+R 5) ] comparator reverse-direction end voltage V-; when V+ > V-: VOUT is high; when v+ < V-: is low. The whole function of the circuit is that when no input signal is input, the switch circuit is not conducted, the value of the same-direction end is larger than that of the reverse end, the operation comparator outputs high level, and the mark is formed: 14, when a signal is input, the non-conductive reverse side signal of the switch circuit is larger than the low level output by the same-direction side signal operation comparator.
The fourth part isolation protection indication module comprises an auxiliary power supply VCC, a light emitting diode LED1 anode, a light emitting diode LED1 cathode, a voltage stabilizing diode Z1 anode, an optocoupler U2 anode, a current limiting resistor R7, an MCU side power supply VCC1, a pull-up resistor R4, an optocoupler U2 collector, an emitter of the optocoupler U2 grounded, and DI output to the MCU from the 4 pin of the optocoupler U2.
The signal isolation and output deflection signal circuit part is as shown in fig. 7, and the circuit is composed of a darlington optocoupler U2, a film resistor R7, a film resistor R4, a ceramic capacitor C2 and a voltage stabilizing tube Z1, wherein the voltage stabilizing tube Z1 is marked with: 16, photodiode, current-limiting resistor R7 constitutes and keeps apart preceding stage control, and when R7 left end was high level, the opto-coupler did not switch on, keeps apart right side R4 and is pull-up, mark: the di output is always high and does not go to signal; when the left end of R7 is at a low level, the optocoupler is turned on, and the mark: 17, the lower end of the isolation right side R4 is grounded, the DI output is changed from high level to low level, a displacement signal exists, and meanwhile, the LED rapidly indicates and marks: and 15, simultaneously transmitting the processed signals to the MCU, and taking the processed signals as the judgment basis by the MCU, the MCU is reliable and stable.
In summary, the specific circuit implementation principle of the invention is as follows: the power supply circuit is an isolated power supply, the signal acquisition and the signal input side are isolated, the power supply system is isolated, the power supply is different power supplies, the stability and the reliability of the acquisition system are ensured, and the circuit input mode is as follows: the method can realize the switching of modes by sending a switching instruction to the MCU through the upper computer software and controlling the level of the PORT through the I/O PORT, and also can realize the switching of modes through the level of the PORT controlled by the toggle switch, the circuit is supported in a default mode, the active, passive and alternating current/direct current self-adaptive switching value is detected, when the passive switching value is switched in, the circuit loop VCC is in short circuit with the PORT A and the PORT B, at the moment, the circuit loop VCC is connected with the PORT A to the PORT B through R1 to D1, and then is compared with a voltage division network set by R3 and R5 through the reverse ends of D12, R10 and Q1 to the operation comparator, at the moment, the reverse end value is larger than the same-direction end value, so that the operation comparator U3A outputs low level, the optical coupler U2 is switched on, the DI signal of the accessed MCU is changed from the original high level to the low level, the deflection is generated, and the MCU acquisition signal is changed from 1 to 0; the method comprises the steps that active alternating current and direct current signals are input, signals are all positive and negative from bottom to top after passing through a full-bridge rectifying circuit formed by D5, D9, D10 and D12, the signal flow is started by an R10 small-power resistor to have a current limiting protection function, the reverse ends of signal conditioning and clamping protection access operation comparators through Q1 to D6, R6, Z3 and C3 are compared with a voltage dividing network set by R3 and R5, at the moment, the reverse end value is larger than the same-direction end value, so that the operation comparator U3A outputs a low level, an optical coupler U2 is conducted, a DI signal accessed to an MCU is changed from an original high level to a low level, deflection is generated, and an MCU acquisition signal is changed from 1 deflection 0; switching modes: the power supply circuit is characterized in that a PORT end low-level signal is given, an optocoupler U1 is conducted, a JK1 relay and a JK2 relay are connected, the JK1 cuts off VCC through an R1 power supply loop and a D1 power supply loop, a JK2 positively strings a PORT A into a diode D7, a PORT B reversely strings into a D11, an input mode is determined for direct current polarity at the moment, a PORT A positive electrode and a PORT B negative electrode can be tested by utilizing multi-channel linkage, the circuit is suitable for permanent magnet switch testing, the voltage signal detection of a switching-on/switching-off coil is achieved, the detection principle of a later circuit is the same as that of an active circuit, and the input type of an alternating current signal is consistent.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. A suitable multi-type opening detection circuit is characterized in that: the system comprises a manual-automatic integrated control conversion module, a high-efficiency rectification module, a switch signal conditioning comprehensive module and an isolation protection indication module which are connected in sequence;
the manual-automatic control conversion module comprises: MCU control PORT PORT, manual button control PORT, control module, conversion module, auxiliary power module for mode switching, PORT A, PORT B and signal access path conversion module; the manual button control PORT, the control module and the conversion module are sequentially connected, the MCU control PORT is connected with the control module, the mode switching auxiliary power supply module is connected with the conversion module, and the PORT A and the PORT B are respectively connected with the signal access path conversion module;
the circuit of the manual-automatic control conversion module consists of a resistor R1, a resistor R2, a diode D1, a diode D2, a diode D3, a diode D4, a diode D7, a diode D8, a diode D11, a voltage stabilizing tube Z4, a relay JK1, a relay JK2 and an isolation optocoupler U1;
wherein, control power VCC1 links to each other with relay power control opto-coupler U1's positive pole through resistance R2, opto-coupler negative pole connects control PORT, opto-coupler U1 collecting electrode connects relay solenoid power VCC0 again through the projecting pole divide two ways: one path goes to the positive electrode of a diode D3, the negative electrode of the diode D3 is connected with the positive electrode of a relay JK1 coil, the negative electrode of the relay coil is grounded, and a diode D2 is reversely connected on the relay coil in parallel to form a follow current diode; the second path is connected to the positive electrode of a diode D4, the negative electrode of the diode D4 is connected with the positive electrode of a relay JK1 coil, the negative electrode of the relay coil is grounded, and a diode D8 is reversely connected on the relay coil in parallel to form a follow current diode; the auxiliary power supply VCC is connected with the anode of a diode D1 through a resistor R1, the cathode of the diode D1 is connected with two groups of switching intermediate contacts of a relay JK1, and the normally closed switches of the two groups of switching of the relay JK1 are connected with the cathode of a voltage stabilizing tube Z4; the port A is a normally closed switch directly connected to two groups of transfer switches of the relay JK2, the port A is a normally closed switch connected to the positive electrode of the diode D7, the negative electrode of the diode D7 is normally open connected to the two groups of transfer switches of the relay JK2, the pin 3 of the middle contact of the relay JK2 is connected to the negative electrode of the voltage stabilizing tube Z4, and the positive electrode of the voltage stabilizing tube Z4 is transmitted to the next stage; the port B is directly connected to normally closed switches of two groups of transfer switches of the relay JK2, the port B is connected to the cathode of the diode D11, the anode of the diode D11 is connected to normally open switches of two groups of transfer switches of the relay JK2, and the pin 6 of the middle contact of the relay JK2 is transmitted to the next stage;
the efficient rectifying module comprises: the PWM control signal is connected with the high-efficiency rectifying circuit;
the switching signal conditioning integrated module comprises: the device comprises a clamping voltage-stabilizing current-limiting protection circuit, a voltage-dividing sampling and switching conditioning signal circuit and a comparison circuit; the clamping voltage-stabilizing current-limiting protection circuit is respectively connected with the voltage-dividing sampling and switching conditioning signal circuit, and the voltage-dividing sampling and switching conditioning signal circuit is also respectively connected with the comparison circuit;
the isolation protection indication module comprises: remote signaling state shift indication, voltage stabilization, isolation protection and DI output; the remote signaling state shift indication and the voltage stabilization are respectively connected with an isolation protection, and the isolation protection is connected with the DI output.
2. The applicable multi-type opening amount detection circuit according to claim 1, wherein: the high-efficiency rectifying module comprises a positive electrode of a voltage stabilizing diode Z4 connected to a cathode of a fast rectifying diode D5, and is simultaneously connected with a positive electrode of a fast rectifying diode D9, a grid electrode G of a MOS (metal oxide semiconductor) tube Q2 is connected with a PWM1 signal of an MCU (micro control unit), a drain electrode D of the MOS tube Q2 is connected to a negative electrode of the D5, a source electrode S of the MOS tube Q2 is connected to a positive electrode of the D5 and is connected to a positive electrode of a fast rectifying diode D10, a negative electrode of the fast rectifying diode D10 and a positive electrode of a fast rectifying diode D12 are simultaneously connected to a pin 6 of a middle contact of a relay JK2, and the negative electrode of the fast rectifying diode D9 and the negative electrode of the fast rectifying diode D12 are simultaneously supplied to a current limiting resistor R10 of the next stage; the positive pole of the fast rectifying diode D5 and the positive pole of the fast rectifying diode D10, the drain electrode D of the MOS tube Q3 is connected to the negative pole of the diode D10, the grid electrode G of the MOS tube Q3 is connected with the PWM2 signal of the MCU, the source electrode S of the MOS tube Q3 is connected to the positive pole of the diode D10, and meanwhile, the signal is transmitted to the next stage.
3. The applicable multi-type opening amount detection circuit according to claim 2, wherein: the switch signal conditioning integrated module comprises an auxiliary power supply VCC, the auxiliary power supply VCC is connected with the same-direction end of a comparator U3A through a resistor R3, a resistor R5 is connected in parallel with the resistor R5, the resistor R5 is connected to the opposite end of the comparator U3A through a resistor R6, a clamping diode D6 is connected in parallel with the resistor R6, the positive electrode of the clamping diode D6 is connected to the opposite end of the comparator U3A, the resistor R5 is connected with the negative electrode of a voltage stabilizing tube Z3, the positive electrode of the voltage stabilizing tube Z3 is connected to the ground, a capacitor C3 is connected to the two ends of the voltage stabilizing tube Z3 in parallel, a power type current limiting resistor R10 is connected to a collector C of an NPN triode Q1, an emitter E of the NPN triode Q1 is connected to the opposite end of the comparator U3A, a bias resistor R8 is connected to a base B and an emitter E of the NPN triode Q1 in parallel, and the base B of the NPN triode Q1 is connected to the output end of the comparator through a current limiting resistor R9 to the output end of the comparator for the next stage of current limiting resistor R7.
4. The applicable multi-type opening amount detection circuit according to claim 3, wherein: the isolation protection indication module comprises an auxiliary power supply VCC, a light emitting diode LED1 anode, a light emitting diode LED1 cathode, a voltage stabilizing diode Z1 cathode, an optocoupler U2 anode, a current limiting resistor R7, an MCU side power supply VCC1, a pull-up resistor R4, an optocoupler U2 collector, an optocoupler U2 emitter, a grounding electrode and DI, wherein the cathode of the light emitting diode LED1 is connected with the anode of the voltage stabilizing diode Z1, the cathode of the voltage stabilizing diode Z1 is connected with the optocoupler U2 anode, the cathode of the optocoupler U2 is connected with a current limiting resistor R7, and the MCU side power supply VCC1 is connected with the optocoupler U2 collector through the pull-up resistor R4, and the DI is output to the MCU from the 4 pins of the optocoupler U2.
5. A control method of a detection circuit based on the applicable multi-type opening amount detection circuit according to any one of claims 1 to 4, characterized in that:
the method comprises the following steps:
the signal flows in from the PORT A, the PORT B, a switching instruction is sent to the MCU through the upper computer software to control the PORT or manually control the PORT, the control module takes effect to control the conversion module, whether the signal of the auxiliary power module is switched in or not is selected, the AC, DC and passive dry node modes are met when the signal is switched in, the DC fixed polarity mode and the permanent magnet switch test mode are not met when the signal is switched in, the normally closed switch channel of the path conversion module, namely the AC, DC and passive dry node modes, is matched with the normally open switch channel, namely the DC fixed polarity mode and the permanent magnet switch test mode, then the signal is subjected to the high-efficiency rectifying circuit combined by the PWM control MOS and the diode, the output signal is subjected to the embedded voltage stabilizing and current limiting protection circuit, the switch conditioning signal circuit, and the generated signal and the partial voltage sampling signal are output through the comparison circuit to be indicated by the isolation protection circuit and the DI output to the MCU to be detected, and the whole flow is completed.
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