CN215525934U - A show voltage acquisition device for full electronic interlocking goat - Google Patents
A show voltage acquisition device for full electronic interlocking goat Download PDFInfo
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- CN215525934U CN215525934U CN202122159403.9U CN202122159403U CN215525934U CN 215525934 U CN215525934 U CN 215525934U CN 202122159403 U CN202122159403 U CN 202122159403U CN 215525934 U CN215525934 U CN 215525934U
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Abstract
The utility model relates to the field of electronic circuits, in particular to a representation voltage acquisition device for an all-electronic interlocking switch machine, which comprises: the signal input end of the input protection circuit is electrically connected with the output end of the representation circuit of the point switch; a voltage dividing circuit; an isolation circuit; a conditioning circuit; the MCU is used for collecting the state of the input protection circuit, controlling the input protection circuit to be disconnected from the point switch when abnormity occurs and outputting alarm information; and a power supply circuit; the input protection circuit, the voltage division circuit, the isolation circuit and the conditioning circuit are electrically connected in sequence, and the MCU is electrically connected with the conditioning circuit and the input protection circuit respectively. The utility model realizes the real-time monitoring and pre-alarming of the representation voltage of the all-electronic interlocking point switch, and improves the reliability and the safety.
Description
Technical Field
The application relates to the field of electronic circuits, in particular to a representation voltage acquisition device for an all-electronic interlocking switch machine.
Background
The point switch is an important signal basic device for converting the position of a railway turnout, changing the opening direction of the turnout, locking a turnout switch blade and reflecting the position of the turnout, and can well ensure the driving safety, improve the transportation efficiency and improve the labor intensity of driving personnel.
The indicating voltage output by the indicating circuit of the switch machine is an important electrical characteristic parameter for judging the working state of the switch machine, when the switch machine has hidden danger, the indicating voltage can reflect the running state of the switch machine, and maintenance personnel can timely carry out preventive maintenance on the switch machine to prevent the switch machine from breaking down. When the point switch has a fault, the indication voltage can accurately reflect the reason of the fault of the turning machine, and the indication voltage is an important basis for maintenance personnel to find the fault.
The traditional voltage acquisition is mainly applied to the voltage acquisition of the relay interlocking point switch, the acquisition contact is arranged behind the relay, and the safety and the reliability of the acquisition device do not influence the sampled circuit. The indicating voltage of the all-electronic interlocking switch machine is driven by a main control circuit of the all-electronic interlocking switch machine, the all-electronic interlocking switch machine has the characteristics of no safe acquisition contact, weak load capacity of an output end and the like, and the reliability and the safety of an acquisition device can directly influence the operation of the main control circuit of the all-electronic interlocking switch machine.
Therefore, the applicant believes that the existing indicating voltage collecting device for the all-electronic interlocking switch machine has the defects of poor reliability and safety, and needs to be improved.
Disclosure of Invention
In order to improve the reliability and safety of the representation voltage acquisition of the all-electronic interlocking switch machine, the application provides a representation voltage acquisition device for the all-electronic interlocking switch machine.
The application provides a show voltage acquisition device for full electronic interlocking goat adopts following technical scheme:
a representative voltage acquisition device for an all-electronic interlocked switch machine, comprising:
the input protection circuit is electrically connected with the signal input end of the input protection circuit and the output end of the indicating circuit of the switch machine, and is used for acquiring the indicating voltage signal output by the switch machine and disconnecting the indicating voltage signal from the switch machine when abnormity occurs;
the voltage division circuit is used for carrying out voltage division processing on the acquired representation voltage;
the isolation circuit is used for isolating signals when abnormity occurs;
the conditioning circuit is used for filtering and amplifying the signal generated by the voltage division circuit;
the MCU is used for collecting the state of the input protection circuit, controlling the input protection circuit to be disconnected from the point switch when abnormity occurs and outputting alarm information; and
the power supply circuit is electrically connected with the input protection circuit, the voltage division circuit, the isolation circuit, the conditioning circuit and the MCU respectively to provide electric energy;
the input protection circuit, the voltage division circuit, the isolation circuit and the conditioning circuit are electrically connected in sequence, and the MCU is electrically connected with the conditioning circuit and the input protection circuit respectively.
In some embodiments, the input protection circuit includes first to fifth resistors, a first capacitor, a first relay unit, a first operational amplifier unit and a first isolation unit, a first terminal of the first relay unit is electrically connected to the power circuit, a first resistor is connected between a second terminal of the first relay unit and the MCU micro-control unit, a third terminal of the first relay unit is electrically connected to the voltage divider circuit, a fourth terminal of the first relay unit forms the voltage collecting terminal of the voltage collecting device, a second resistor is connected between the power circuit and the negative input terminal of the first operational amplifier unit, the first capacitor and the third resistor are connected in parallel between the negative input terminal of the first operational amplifier unit and the ground line, and the positive input terminal of the first operational amplifier unit is electrically connected to the voltage divider circuit, the power supply negative terminal of the first operational amplification unit is grounded, the power supply positive terminal of the first operational amplification unit is electrically connected with the power supply circuit, the output end of the first operational amplification unit is connected with a fourth resistor between the first wiring terminals of the first isolation unit, the second wiring terminals and the fourth wiring terminals of the first isolation unit are grounded respectively, the third wiring terminals of the first isolation unit are connected with a fifth resistor between the power supply circuit, and the third wiring terminals of the first isolation unit are further electrically connected with the MCU.
In some embodiments, the first isolation unit is a photo coupler, the first isolation unit includes a first diode and a first triode, an anode of the first diode is a first terminal of the first isolation unit, a cathode of the first diode is a second terminal of the first isolation unit, a collector of the first triode is a third terminal of the first isolation unit, and an emitter of the first triode is a fourth terminal of the first isolation unit.
In some embodiments, the first diode is a light emitting diode and the first transistor is a photo transistor.
In some embodiments, the voltage divider circuit includes a sixth resistor, a seventh resistor, an eighth resistor, and a first bidirectional TVS tube, a first end of the sixth resistor is electrically connected to the third terminal of the first relay unit, the seventh resistor and the first bidirectional TVS tube are connected in parallel between a second end of the sixth resistor and a ground line, and the eighth resistor is connected between the second end of the sixth resistor and the positive input end of the first operational amplifier unit.
In some embodiments, the voltage divider circuit further includes a ninth resistor, a second operational amplifier unit, and a second capacitor, the ninth resistor is connected between a second end of the sixth resistor and a negative input end of the second operational amplifier unit, a positive input end of the second operational amplifier unit is grounded, the second capacitor is connected between the negative input end of the second operational amplifier unit and an output end of the second operational amplifier unit, and the output end of the second operational amplifier unit is electrically connected to the isolation circuit.
Due to the fact that the operating voltage and current of the point switch are high, the voltage dividing circuit divides the acquired voltage signals by adopting the technical scheme.
In some embodiments, the isolation circuit includes a tenth resistor, an eleventh resistor, a second isolation unit, a third capacitor, and a third operational amplification unit, a first terminal of the second isolation unit is electrically connected to an output terminal of the second operational amplification unit, the tenth resistor is connected between a second terminal of the second isolation unit and the power circuit, a third terminal of the second isolation unit is electrically connected to a negative input terminal of the second operational amplification unit, a fourth terminal of the second isolation unit is grounded, a fifth terminal of the second isolation unit and a positive input terminal of the third operational amplification unit are both grounded, a sixth terminal of the second isolation unit is electrically connected to a negative input terminal of the third operational amplification unit, and the third capacitor and the tenth capacitor are connected in parallel between the negative input terminal of the third operational amplification unit and the output terminal of the third operational amplification unit A resistor.
In some embodiments, the second isolation unit is a photo coupler, the second isolation unit includes a second diode, a third diode, and a fourth diode, a cathode of the second diode is the first terminal of the second isolation unit, an anode of the second diode is the second terminal of the second isolation unit, a cathode of the third diode is the third terminal of the second isolation unit, an anode of the third diode is the fourth terminal of the second isolation unit, an anode of the fourth diode is the fifth terminal of the second isolation unit, and a cathode of the fourth diode is the sixth terminal of the second isolation unit.
In some embodiments, the second diode is a light emitting diode, and the third diode and the fourth diode are both photodiodes.
Because the acquired voltage signal is a high-voltage signal and the working environment is possibly struck by lightning, the acquired voltage signal is physically isolated by adopting the technical scheme, so that the acquisition device of the embodiment can work more reliably and safely.
In some embodiments, the conditioning circuit includes a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fourth capacitor, a fifth capacitor, a sixth capacitor, and a fourth operational amplifier unit, a first end of the twelfth resistor is electrically connected to an output end of the third operational amplifier unit, the fourth capacitor is connected between a second end of the twelfth resistor and a ground line, a first end of the thirteenth resistor is electrically connected to a second end of the twelfth resistor, a fifth capacitor is connected between a second end of the thirteenth resistor and a negative input end of the fourth operational amplifier unit, the fourteenth resistor is connected between a second end of the thirteenth resistor and a positive input end of the fourth operational amplifier unit, the sixth capacitor is connected between a positive input end of the fourth operational amplifier unit and a ground line, and a negative input end of the fourth operational amplifier unit is electrically connected to an output end of the fourth operational amplifier unit And the output end of the fourth operational amplification unit is further electrically connected with the MCU.
By adopting the technical scheme, the conditioning circuit carries out filtering and proper amplification processing on the signal generated by the voltage division circuit, so that the MCU can better acquire and process data.
In some embodiments, the input protection circuit comprises a first input protection circuit and a second input protection circuit, and the first input protection circuit and the second input protection circuit respectively collect positioning representation voltage signals and inversion representation voltage signals output by the switch machine;
the voltage division circuit comprises a first voltage division circuit and a second voltage division circuit;
the isolation circuit comprises a first isolation circuit and a second isolation circuit;
the conditioning circuit comprises a first conditioning circuit and a second conditioning circuit;
the first input protection circuit, the first voltage division circuit, the first isolation circuit and the first conditioning circuit are electrically connected in sequence, and the MCU is electrically connected with the first conditioning circuit and the first input protection circuit respectively;
the second input protection circuit, the second voltage division circuit, the second isolation circuit and the second conditioning circuit are electrically connected in sequence, and the MCU is electrically connected with the second conditioning circuit and the second input protection circuit respectively.
In some embodiments, the MCU micro control unit is connected to a communication bus, and a bus isolation circuit and a bus protection circuit are sequentially electrically connected between the MCU micro control unit and the communication bus.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the electric characteristics of the switch machine indicating circuit are isolated and sampled, the indicating voltage change curve in the operation process of the switch machine is accurately recorded aiming at the subtle change of the electric characteristics of the switch machine, when the indicating voltage electric characteristics are abnormal, alarm information is output, maintenance personnel can timely know the electric characteristics of switch machine equipment, the switch machine is prevented from being out of order, and the switch machine is ensured to be in a good operation state.
2. The method has the advantages that the protection on the input acquisition end is enhanced, the method can adapt to the characteristics that the switch machine of the all-electronic interlocking system has no safe acquisition contact and weak load capacity, and the like, can be widely applied to the switch machine of the all-electronic interlocking system of urban rail transit for acquiring the indicated voltage, and realizes the real-time monitoring and pre-alarming of the indicated voltage of the all-electronic interlocking switch machine.
Drawings
FIG. 1 is a block diagram of a schematic structure provided in an embodiment of the present application;
fig. 2 is a schematic diagram of a principle of an MCU micro control unit provided in the embodiment of the present application;
FIG. 3 is a schematic circuit diagram of a voltage isolation and conversion circuit according to an embodiment of the present disclosure;
fig. 4 is a schematic circuit diagram of an input protection circuit, a voltage divider circuit, an isolation circuit, and a conditioning circuit according to an embodiment of the present disclosure;
fig. 5 is a schematic circuit diagram of a bus isolation circuit and a bus protection circuit according to an embodiment of the present disclosure.
Detailed Description
The present application is described in further detail below with reference to figures 1 to 5.
As shown in fig. 1, the representative voltage collecting device of the all-electronic interlocked switch machine according to the embodiment of the present application includes a power circuit, an MCU micro-control unit, an input protection circuit 100, a voltage dividing circuit 110, an isolation circuit 120, and a conditioning circuit 130, the power supply circuit is respectively connected with the MCU, the input protection circuit 100, the voltage division circuit 110, the isolation circuit 120 and the conditioning circuit 130 to provide electric energy, the MCU is respectively connected with the power supply circuit, the input protection circuit 100 and the conditioning circuit 130 to electrically connect, the input protection circuit 100 is connected between the switch and the voltage division circuit 110, the isolation circuit 120 is connected between the voltage division circuit 110 and the conditioning circuit 130, the MCU is connected with the communication bus, and the bus isolation circuit and the bus protection circuit are sequentially and electrically connected between the MCU and the communication bus. The MCU micro-control unit is a core processing component of this embodiment, and performs a/D conversion on an input signal, monitors the input state of the switch machine in real time, and converts the input signal into alarm information and monitoring data that can be received by the host computer.
As shown in fig. 2 and 3, the power supply circuit may include a voltage isolation and conversion circuit. In this embodiment, each component cannot operate under the same power supply due to the requirement of safe and reliable operation, and therefore conversion is performed in a physical isolation manner, and the voltage output by the power supply circuit is processed by the voltage isolation and conversion circuit and then is supplied to each component. The MCU micro control unit adopts, for example, an ARM architecture-based STM32F407 series chip as a central processing unit, the central processing unit is used in combination with a peripheral circuit to form a control circuit, when an abnormality occurs, a signal is output to the input protection circuit 100, the connection between the sampling cable and the sampling device of the embodiment is disconnected, and the influence on a sampled device during the abnormal operation is prevented. Peripheral circuits, voltage isolation and conversion circuits, bus isolation circuits, bus protection circuits of the MCU micro-control unit, and software control methods inside the MCU micro-control unit are all common technologies in the art, and therefore will not be described in detail in this application. Since the present application mainly protects the circuit structure part, not the software control part, the following description mainly focuses on the description of the hardware circuit, and particularly describes the hardware circuit principle of the input protection circuit 100, the voltage divider circuit 110, the isolation circuit 120 and the conditioning circuit 130.
In some possible embodiments, as shown in fig. 4, the input protection circuit 100 includes a first resistor R111, a second resistor R1113, a third resistor R114, a fourth resistor R115, a fifth resistor R116, a first capacitor C111, a first relay unit U111, a first operational amplifier unit U101A, and a first isolation unit U112, a first terminal of the first relay unit U111 is electrically connected to the power circuit, a first resistor R111 is connected between a second terminal of the first relay unit U111 and the MCU micro-control unit, a third terminal of the first relay unit U111 is electrically connected to the voltage divider circuit 110, a fourth terminal of the first relay unit U111 forms a voltage collecting terminal representing the voltage collecting device, a second resistor R1113 is connected between the power circuit and the negative input terminal of the first operational amplifier unit U101A, a first capacitor C111 and a third resistor R114 are connected in parallel between the negative input terminal of the first operational amplifier unit U101A and the ground line, the positive input end of the first operational amplification unit U101A is electrically connected with the voltage division circuit 110, the negative power end of the first operational amplification unit U101A is grounded, the positive power end of the first operational amplification unit U101A is electrically connected with the power circuit, a fourth resistor R115 is connected between the output end of the first operational amplification unit U101A and the first terminal of the first isolation unit U112, the second terminal and the fourth terminal of the first isolation unit U112 are grounded respectively, a fifth resistor R116 is connected between the third terminal of the first isolation unit U112 and the power circuit, and the third terminal of the first isolation unit U112 is further electrically connected with the MCU.
When the voltage acquisition module is applied, a plurality of voltage acquisition points can be arranged, and each group of voltage acquisition modules needs to comprise an input protection circuit 100, a voltage division circuit 110, an isolation circuit 120 and a conditioning circuit 130. In this embodiment, the indication voltage acquisition device has two voltage acquisition points, wherein the input protection circuit 100 includes a first input protection circuit and a second input protection circuit, and the first input protection circuit and the second input protection circuit respectively acquire a positioning indication voltage signal and an inverted indication voltage signal output by the switch machine; the voltage dividing circuit 110 includes a first voltage dividing circuit and a second voltage dividing circuit; the isolation circuit 120 includes a first isolation circuit and a second isolation circuit; the conditioning circuit 130 comprises a first conditioning circuit and a second conditioning circuit; the first input protection circuit, the first voltage division circuit, the first isolation circuit and the first conditioning circuit are electrically connected in sequence, and the MCU is electrically connected with the first conditioning circuit and the first input protection circuit respectively; the second input protection circuit, the second voltage division circuit, the second isolation circuit and the second conditioning circuit are electrically connected in sequence, and the MCU is electrically connected with the second conditioning circuit and the second input protection circuit respectively. The embodiment can realize the full collection of the representation voltage of one switch machine.
The first isolation unit U112 is, for example, a PC817 photocoupler, the first isolation unit U112 includes a first diode U112-2 and a first triode U112-3, an anode of the first diode U112-2 is a first terminal of the first isolation unit U112, a cathode of the first diode U112-2 is a second terminal of the first isolation unit U112, a collector of the first triode U112-3 is a third terminal of the first isolation unit U112, and an emitter of the first triode U112-3 is a fourth terminal of the first isolation unit U112. The first diode U112-2 is a light emitting diode, and the first transistor U112-3 is a photo transistor.
When the micro control unit is in use, the MCU micro control unit sends a first control signal to the second terminal of the first relay unit U111, so that the third terminal of the first relay unit U111 is conducted with the fourth terminal of the first relay unit U111 (namely, a switch in the first relay unit U111 is conducted, the switch is connected between the third terminal of the first relay unit U111 and the fourth terminal of the first relay unit U111), a voltage signal which is acquired by the fourth terminal of the first relay unit U111 and represents the voltage is transmitted to the voltage division circuit 110, the voltage division circuit 110 transmits a divided voltage signal to the first operational amplification unit U101A for processing, when the voltage of the divided voltage signal is greater than the voltage input by the negative input end of the first operational amplification unit U101A, the first diode U112-2 emits light, so that the first triode U112-3 is conducted, and the collector of the first triode U112-3 outputs a signal to the MCU micro control unit, and then the MCU sends a second control signal to a second terminal of the first relay unit U111, so that a third terminal of the first relay unit U111 is disconnected with a fourth terminal of the first relay unit U111, and overvoltage protection is realized.
In some possible embodiments, the voltage divider circuit 110 includes a sixth resistor R101, a seventh resistor R102, an eighth resistor R112, a ninth resistor R103, a first bidirectional TVS tube F101, a second operational amplifier unit U101C, and a second capacitor C101, a first end of the sixth resistor R101 is electrically connected to the third terminal of the first relay unit U111, the seventh resistor R102 and the first bidirectional TVS tube F101 are connected in parallel between a second end of the sixth resistor R101 and the ground, and the eighth resistor R112 is connected between a second end of the sixth resistor R101 and the positive input end of the first operational amplifier unit U101A. A ninth resistor R103 is connected between the second end of the sixth resistor R101 and the negative input end of the second operational amplification unit U101C, the positive input end of the second operational amplification unit U101C is grounded, the second capacitor C101 is connected between the negative input end of the second operational amplification unit U101C and the output end of the second operational amplification unit U101C, and the output end of the second operational amplification unit U101C is electrically connected to the isolation circuit 120.
In some possible embodiments, the voltage dividing circuit 110 sets the sampling resistor of the sampling device of this embodiment according to the internal resistance of the sampled circuit, and provides selectable 5-level sampling resistors of 2 Ω, 4 Ω, 6 Ω, 8 Ω, and 10 Ω for matching the load capability of the sampled circuit. According to a formula of R line impedance = R internal resistance multiplied by R sampling resistance/(R internal resistance + R sampling resistance), selecting a proper sampling resistance to enable the R line impedance to be close to the R internal resistance, and preventing the acquisition device from influencing the output electrical characteristic parameters of the sampled equipment.
In some possible embodiments, the isolation circuit 120 includes a tenth resistor R104, an eleventh resistor R105, a first terminal of the second isolation unit U102 is electrically connected to an output end of the second operational amplification unit U101C, a tenth resistor R104 is connected between the power circuit and a second terminal of the second isolation unit U102, a third terminal of the second isolation unit U102 is electrically connected to a negative input end of the second operational amplification unit U101C, a fourth terminal of the second isolation unit U102 is grounded, a fifth terminal of the second isolation unit U102 and a positive input end of the third operational amplification unit U103B are both grounded, a sixth terminal of the second isolation unit U102 is electrically connected to a negative input end of the third operational amplification unit U103B, and a third capacitor C102 and an eleventh resistor R105 are connected in parallel between a negative input end and an output end of the third operational amplification unit U103B.
The second isolation unit U102 is, for example, an HCNR200 photocoupler, the second isolation unit U102 includes a second diode U102-1, a third diode U102-2, and a fourth diode U102-3, a cathode of the second diode U102-1 is a first terminal of the second isolation unit U102, an anode of the second diode U102-1 is a second terminal of the second isolation unit U102, a cathode of the third diode U102-2 is a third terminal of the second isolation unit U102, an anode of the third diode U102-2 is a fourth terminal of the second isolation unit U102, an anode of the fourth diode U102-3 is a fifth terminal of the second isolation unit U102, and a cathode of the fourth diode U102-3 is a sixth terminal of the second isolation unit U102. In this embodiment, the second diode U102-1 is a light emitting diode, and the third diode U102-2 and the fourth diode U102-3 are photodiodes.
In some possible embodiments, the conditioning circuit 130 includes a twelfth resistor R106, a thirteenth resistor R107, a fourteenth resistor R108, a fourth capacitor C103, a fifth capacitor C105, a sixth capacitor C106, and a fourth operational amplifier unit U103C, a first end of the twelfth resistor R106 is electrically connected to an output end of the third operational amplifier unit U103B, a fourth capacitor C103 is connected between a second end of the twelfth resistor R106 and the ground, a first end of the thirteenth resistor R107 is electrically connected to a second end of the twelfth resistor R106, a fifth capacitor C105 is connected between a second end of the thirteenth resistor R107 and a negative input end of the fourth operational amplifier unit U103C, a fourteenth resistor R108 is connected between a second end of the thirteenth resistor R107 and a positive input end of the fourth operational amplifier unit U103C, a sixth capacitor C106 is connected between a positive input end of the fourth operational amplifier unit U103C and the ground, a negative input end of the fourth operational amplifier unit U103C is electrically connected to an output end of the fourth operational amplifier unit U103C, and the output end of the fourth operational amplifier unit U103C is further electrically connected to the MCU micro control unit.
When the switch point indicating voltage control device is used, the indicating voltage signal collected by the fourth terminal of the first relay unit U111 is transmitted to the voltage dividing circuit 110, the voltage dividing circuit 110 also transmits the voltage dividing signal to the isolating circuit 120, and then the voltage dividing signal is transmitted to the conditioning circuit 130 from the isolating circuit 120 to be conditioned and then output to the MCU micro control unit, the isolating circuit 120 is a linear isolating circuit, so that the size of the voltage signal at the input end of the isolating circuit 120 is in direct proportion to the size of the voltage signal at the output end of the isolating circuit 120, the MCU micro control unit can accurately record an indicating voltage change curve in the operation process of the switch point, and when the indicating voltage of the switch point deviates from a normal value, pre-alarm information is output. In addition, the isolation circuit 120 also has an isolation function, and when a fault such as a short circuit occurs in the voltage acquisition device, the normal operation of the all-electronic interlocking switch machine is not affected.
In some possible embodiments, the MCU main thread execution flow is divided into 3 parts of main contents: 1) acquiring the representation voltage of the point switch in real time, and outputting a real-time acquisition value through an RS485 standard bus in a fixed period; 2) acquiring and controlling the state of the input protection circuit 100, and outputting module self-diagnosis alarm information; 3) and analyzing the data acquired by the point switch in real time, comparing the data with a normal value of the point switch during working, outputting pre-alarm information through an RS485 bus when the working value deviates, and prompting maintenance personnel to overhaul the sampled equipment.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A representative voltage acquisition device for an all-electronic interlocked switch machine, characterized in that: which comprises
The input protection circuit is electrically connected with the signal input end of the input protection circuit and the output end of the indicating circuit of the switch machine, and is used for acquiring the indicating voltage signal output by the switch machine and disconnecting the indicating voltage signal from the switch machine when abnormity occurs;
the voltage division circuit is used for carrying out voltage division processing on the acquired representation voltage;
the isolation circuit is used for isolating signals when abnormity occurs;
the conditioning circuit is used for filtering and amplifying the signal generated by the voltage division circuit;
the MCU is used for collecting the state of the input protection circuit, controlling the input protection circuit to be disconnected from the point switch when abnormity occurs and outputting alarm information; and
the power supply circuit is electrically connected with the input protection circuit, the voltage division circuit, the isolation circuit, the conditioning circuit and the MCU respectively to provide electric energy;
the input protection circuit, the voltage division circuit, the isolation circuit and the conditioning circuit are electrically connected in sequence, and the MCU is electrically connected with the conditioning circuit and the input protection circuit respectively.
2. The representative voltage collecting device for an all-electronic interlocked switch machine according to claim 1, wherein: the input protection circuit comprises first to fifth resistors, a first capacitor, a first relay unit, a first operational amplification unit and a first isolation unit, wherein a first wiring end of the first relay unit is electrically connected with the power circuit, a first resistor is connected between a second wiring end of the first relay unit and the MCU micro control unit, a third wiring end of the first relay unit is electrically connected with the voltage division circuit, a fourth wiring end of the first relay unit forms a voltage acquisition end of the voltage acquisition device, a second resistor is connected between the power circuit and a negative input end of the first operational amplification unit, the first capacitor and the third resistor are connected in parallel between the negative input end of the first operational amplification unit and a ground wire, and a positive input end of the first operational amplification unit is electrically connected with the voltage division circuit, the power supply negative terminal of the first operational amplification unit is grounded, the power supply positive terminal of the first operational amplification unit is electrically connected with the power supply circuit, the output end of the first operational amplification unit is connected with a fourth resistor between the first wiring terminals of the first isolation unit, the second wiring terminals and the fourth wiring terminals of the first isolation unit are grounded respectively, the third wiring terminals of the first isolation unit are connected with a fifth resistor between the power supply circuit, and the third wiring terminals of the first isolation unit are further electrically connected with the MCU.
3. The representative voltage collecting device for an all-electronic interlocked switch machine according to claim 2, wherein: the first isolation unit is a photoelectric coupler and comprises a first diode and a first triode, the anode of the first diode is a first wiring end of the first isolation unit, the cathode of the first diode is a second wiring end of the first isolation unit, the collector of the first triode is a third wiring end of the first isolation unit, and the emitter of the first triode is a fourth wiring end of the first isolation unit.
4. The representative voltage collecting device for an all-electronic interlocked switch machine according to claim 2, wherein: the voltage division circuit comprises a sixth resistor, a seventh resistor, an eighth resistor and a first bidirectional TVS tube, the first end of the sixth resistor is electrically connected with the third wiring end of the first relay unit, the second end of the sixth resistor is connected with the ground wire in parallel, the seventh resistor is connected with the first bidirectional TVS tube, and the second end of the sixth resistor is connected with the eighth resistor between the positive input end of the first operational amplification unit.
5. The representative voltage collecting device for an all-electronic interlocked switch machine according to claim 4, wherein: the voltage division circuit further comprises a ninth resistor, a second operational amplification unit and a second capacitor, the ninth resistor is connected between the second end of the sixth resistor and the negative input end of the second operational amplification unit, the positive input end of the second operational amplification unit is grounded, the second capacitor is connected between the negative input end of the second operational amplification unit and the output end of the second operational amplification unit, and the output end of the second operational amplification unit is electrically connected with the isolation circuit.
6. The representative voltage collecting device for an all-electronic interlocked switch machine according to claim 5, wherein: the isolation circuit comprises a tenth resistor, an eleventh resistor, a second isolation unit, a third capacitor and a third operational amplification unit, the first terminal of the second isolation unit is electrically connected with the output end of the second operational amplification unit, the tenth resistor is connected between the second terminal of the second isolation unit and the power circuit, the third terminal of the second isolation unit is electrically connected with the negative input end of the second operational amplification unit, the fourth terminal of the second isolation unit is grounded, the fifth terminal of the second isolation unit and the positive input end of the third operational amplification unit are both grounded, the sixth terminal of the second isolation unit is electrically connected with the negative input end of the third operational amplification unit, the third capacitor and the eleventh resistor are connected in parallel between the negative input end of the third operational amplification unit and the output end of the third operational amplification unit.
7. The representative voltage collecting device for an all-electronic interlocked switch machine according to claim 6, wherein: the second isolation unit is a photocoupler, the second isolation unit includes a second diode, a third diode and a fourth diode, a cathode of the second diode is a first terminal of the second isolation unit, an anode of the second diode is a second terminal of the second isolation unit, a cathode of the third diode is a third terminal of the second isolation unit, an anode of the third diode is a fourth terminal of the second isolation unit, an anode of the fourth diode is a fifth terminal of the second isolation unit, and a cathode of the fourth diode is a sixth terminal of the second isolation unit.
8. The representative voltage collecting device for an all-electronic interlocked switch machine according to claim 6, wherein: the conditioning circuit comprises a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fourth capacitor, a fifth capacitor, a sixth capacitor and a fourth operational amplification unit, wherein a first end of the twelfth resistor is electrically connected with an output end of the third operational amplification unit, the fourth capacitor is connected between a second end of the twelfth resistor and a ground wire, a first end of the thirteenth resistor is electrically connected with a second end of the twelfth resistor, the fifth capacitor is connected between a second end of the thirteenth resistor and a negative input end of the fourth operational amplification unit, the fourteenth resistor is connected between a second end of the thirteenth resistor and a positive input end of the fourth operational amplification unit, the sixth capacitor is connected between a positive input end of the fourth operational amplification unit and the ground wire, and a negative input end of the fourth operational amplification unit is electrically connected with an output end of the fourth operational amplification unit, and the output end of the fourth operational amplification unit is further electrically connected with the MCU.
9. The representative voltage collecting device for an all-electronic interlocked switch machine according to claim 1, wherein:
the input protection circuit comprises a first input protection circuit and a second input protection circuit, and the first input protection circuit and the second input protection circuit respectively acquire a positioning representation voltage signal and an inversion representation voltage signal output by the point switch;
the voltage division circuit comprises a first voltage division circuit and a second voltage division circuit;
the isolation circuit comprises a first isolation circuit and a second isolation circuit;
the conditioning circuit comprises a first conditioning circuit and a second conditioning circuit;
the first input protection circuit, the first voltage division circuit, the first isolation circuit and the first conditioning circuit are electrically connected in sequence, and the MCU is electrically connected with the first conditioning circuit and the first input protection circuit respectively;
the second input protection circuit, the second voltage division circuit, the second isolation circuit and the second conditioning circuit are electrically connected in sequence, and the MCU is electrically connected with the second conditioning circuit and the second input protection circuit respectively.
10. The representative voltage collecting device for an all-electronic interlocked switch machine according to claim 1, wherein: the MCU is connected with the communication bus, and a bus isolation circuit and a bus protection circuit are sequentially and electrically connected between the MCU and the communication bus.
Priority Applications (1)
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