Indication acquisition circuit and control device for an ac point machine

Abstract

The application discloses an indicating acquisition circuit and a control device of an AC switch machine, which comprises a first indicating acquisition module, a second indicating acquisition module and a control module. The first indicating acquisition module and the second indicating acquisition module both comprise a transformer, an indicating relay, a first current acquisition unit, a second current acquisition unit, a first one-way transmission circuit, a second one-way transmission circuit, a third one-way transmission circuit and a fourth one-way transmission circuit. The transformer comprises a primary winding, a first secondary winding and a second secondary winding. The indicating relay comprises a first indicating switch, a second indicating switch, a third indicating switch and a fourth indicating switch. The coil of the indicating relay, the first current acquisition unit and the second current acquisition unit are electrically connected with the control module. The control module is used for outputting a first control signal, acquiring an indicating signal provided by the first current acquisition unit and the second current acquisition unit, and detecting the position of the AC switch machine according to the indicating signal.

Description

Technical Field

[0001] This invention relates to the field of rail transit detection technology, and in particular to a display and acquisition circuit and control device for an AC switch machine. Background Technology

[0002] In fully electronically interlocked stations, the external construction environment for AC switch machines is complex, the wiring is extensive, and human factors have a significant impact. During on-site commissioning or operation, numerous problems inevitably arise, such as cable tangling, short circuits, wire breaks, and control equipment malfunctions. These issues can lead to signal shutdown delays and train delays, resulting in substantial economic losses.

[0003] The indicator acquisition function of AC switch machines is used to collect the indicator status of the switch machines in order to detect their position. Currently, the design of the indicator acquisition function for switch machines cannot meet the needs of various AC switch machines, and its position detection anti-interference capability is weak, resulting in inaccurate detection results and posing safety hazards to station turnout operations. Summary of the Invention

[0004] This invention provides an AC switch machine display acquisition circuit and control device that supports redundancy and hot standby, can accurately detect the position of the AC switch machine, and can improve the availability and safety of the station turnout control function.

[0005] According to one aspect of the present invention, a display acquisition circuit for an AC switch machine is provided, comprising: a first display acquisition module, a second display acquisition module, and a control module;

[0006] Both the first and second representation acquisition modules include: a transformer, a representation relay, a first current acquisition unit, a second current acquisition unit, a first unidirectional transmission circuit, a second unidirectional transmission circuit, a third unidirectional transmission circuit, and a fourth unidirectional transmission circuit;

[0007] The transformer includes a primary winding, a first secondary winding, and a second secondary winding; the indicator relay includes a first indicator switch, a second indicator switch, a third indicator switch, and a fourth indicator switch;

[0008] The first end of the first secondary winding is electrically connected to the input end of the first unidirectional transmission circuit and the output end of the second unidirectional transmission circuit at the first node. The output ends of the first unidirectional transmission circuit and the third unidirectional transmission circuit are both electrically connected to the first end of the first indicator switch.

[0009] The first end of the first current acquisition unit is electrically connected to the second end of the first secondary winding, and the second end of the first current acquisition unit is electrically connected to the first end of the second indicator switch at the second node.

[0010] The first end of the second secondary winding is electrically connected to the input end of the third unidirectional transmission circuit and the output end of the fourth unidirectional transmission circuit at the third node. The input end of the fourth unidirectional transmission circuit and the input end of the second unidirectional transmission circuit are electrically connected to the first end of the third indicator switch.

[0011] The first end of the second current acquisition unit is electrically connected to the second end of the second secondary winding, and the second end of the second current acquisition unit is electrically connected to the first end of the fourth indicator switch at the fourth node;

[0012] The second terminals of the first indicator switch, the second indicator switch, the third indicator switch, and the fourth indicator switch are all electrically connected to the AC switch motor.

[0013] The coil representing the relay is electrically connected to the control module, and both the first current acquisition unit and the second current acquisition unit are electrically connected to the control module;

[0014] The control module is used to output a first control signal to the coil of the indicator relay, acquire the indicator signals provided by the first current acquisition unit and the second current acquisition unit, and detect the position of the AC switch machine based on the indicator signals.

[0015] Optionally, both the first and second representation acquisition modules further include: a third current acquisition unit and a fourth current acquisition unit;

[0016] The third current acquisition unit is electrically connected between the second node and the first terminal of the second indicator switch;

[0017] The fourth current acquisition unit is electrically connected between the fourth node and the first terminal of the fourth indicator switch;

[0018] Both the third current acquisition unit and the fourth current acquisition unit are electrically connected to the control module.

[0019] Optionally, both the first and second representation acquisition modules further include: a first protection switch and a second protection switch;

[0020] The first protection switch is electrically connected between the second end of the first secondary winding and the first end of the first current acquisition unit;

[0021] The second protection switch is electrically connected between the second end of the second secondary winding and the first end of the second current acquisition unit;

[0022] Both the first protection switch and the second protection switch are electrically connected to the control module;

[0023] The control module is also used to output a second control signal to the first protection switch and the second protection switch to control the first protection switch and the second protection switch to be turned on or off.

[0024] Optionally, both the first and second representation acquisition modules further include: a first self-test switch and a second self-test switch;

[0025] The first self-test switch is electrically connected between the first node and the second node;

[0026] The second self-test switch is electrically connected between the third node and the fourth node;

[0027] Both the first self-test switch and the second self-test switch are electrically connected to the control module;

[0028] The control module is also used to output a third control signal to the first self-test switch and the second self-test switch to control the first self-test switch and the second self-test switch to be turned on or off.

[0029] Optionally, the first current acquisition unit includes a first acquisition optocoupler, a second acquisition optocoupler, and a first acquisition resistor;

[0030] The first acquisition resistor is electrically connected between the second end of the first secondary winding and the second node; the input end of the first acquisition optocoupler is electrically connected to the second node, and the output end of the first acquisition optocoupler is electrically connected to the second end of the first secondary winding; the input end of the second acquisition optocoupler is electrically connected to the second end of the first secondary winding, and the output end of the second acquisition optocoupler is electrically connected to the second node.

[0031] The second current acquisition unit includes a third acquisition optocoupler, a fourth acquisition optocoupler, and a second acquisition resistor; the second acquisition resistor is electrically connected between the second end of the second secondary winding and the fourth node; the input end of the third acquisition optocoupler is electrically connected to the fourth node, and the output end of the third acquisition optocoupler is electrically connected to the second end of the second secondary winding; the input end of the fourth acquisition optocoupler is electrically connected to the second end of the second secondary winding, and the output end of the fourth acquisition optocoupler is electrically connected to the fourth node.

[0032] The first acquisition optical coupler, the second acquisition optical coupler, the third acquisition optical coupler, and the fourth acquisition optical coupler are all electrically connected to the control module.

[0033] Optionally, the third current acquisition unit includes: a fifth acquisition optocoupler, a sixth acquisition optocoupler, and a third acquisition resistor;

[0034] The third acquisition resistor is electrically connected between the second node and the first terminal of the second indicator switch; the input terminal of the fifth acquisition optocoupler is electrically connected to the first terminal of the second indicator switch, and the output terminal of the fifth acquisition optocoupler is electrically connected to the second node; the input terminal of the sixth acquisition optocoupler is electrically connected to the second node, and the output terminal of the sixth acquisition optocoupler is electrically connected to the first terminal of the second indicator switch.

[0035] The fourth current acquisition unit includes: a seventh acquisition optocoupler, an eighth acquisition optocoupler, and a fourth acquisition resistor; the fourth acquisition resistor is electrically connected between the fourth node and the first terminal of the fourth indicator switch; the input terminal of the seventh acquisition optocoupler is electrically connected to the first terminal of the fourth indicator switch, and the output terminal of the seventh acquisition optocoupler is electrically connected to the fourth node; the input terminal of the eighth acquisition optocoupler is electrically connected to the fourth node, and the output terminal of the eighth acquisition optocoupler is electrically connected to the first terminal of the fourth indicator switch.

[0036] The fifth, sixth, seventh, and eighth optical acquisition couplers are all electrically connected to the control module.

[0037] Optionally, the indicating relay further includes: at least one detection switch;

[0038] The first end of the detection switch is electrically connected to the control module, and the second end of the detection switch receives a fixed voltage signal.

[0039] Optionally, the control module includes a first controller and a second controller;

[0040] The first controller is communicatively connected to the second controller, and both the first controller and the second controller are communicatively connected to the host computer.

[0041] Optionally, the display acquisition circuit of the AC switch machine further includes: a first driving module and a second driving module;

[0042] Both the first drive module and the second drive module are electrically connected to the control module and the AC switch electromechanical system;

[0043] The control module is also configured to control the first drive module to drive the AC switch machine according to the turnout signal, and / or to control the second drive module to drive the AC switch machine according to the turnout signal.

[0044] According to one aspect of the present invention, a control device for an AC switch machine is provided, comprising at least two of the aforementioned AC switch machine display and acquisition circuits.

[0045] The AC switch machine indication acquisition circuit provided by this invention, by setting up a first indication acquisition module, a second indication acquisition module, and a control module, enables the control module to acquire indications of one AC switch machine through the first indication acquisition module and to acquire indications of another AC switch machine through the second indication acquisition module. This meets the on-site requirements of multiple AC switch machines in a station. By setting both the first and second indication acquisition modules to include a transformer, an indication relay, a first current acquisition unit, a second current acquisition unit, a first unidirectional transmission circuit, a second unidirectional transmission circuit, a third unidirectional transmission circuit, and a fourth unidirectional transmission circuit, it is possible to... With the coordination of the position status of the AC switch machine and each unidirectional transmission circuit, the first and second secondary windings of the transformer can cooperate with each unidirectional transmission circuit to form corresponding current paths. This allows the first and second current acquisition units to acquire corresponding current signals, enabling the control module to obtain the indication signal of the AC switch machine. Furthermore, the position of the AC switch machine can be detected based on the indication signal, and the state of the indication acquisition module can be controlled by controlling the state of the indication relay. The circuit principle is simple and easy to set up, improving the accuracy of AC switch machine position detection and contributing to improved station turnout safety.

[0046] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 This is a schematic diagram of the structure of a display and acquisition circuit for an AC switch machine provided in an embodiment of the present invention;

[0049] Figure 2 This is a schematic diagram of a circuit structure representing a data acquisition module provided in an embodiment of the present invention;

[0050] Figure 3 This is a schematic diagram of a control system for the display and acquisition circuit of an AC switch machine provided in an embodiment of the present invention;

[0051] Figure 4 This is a schematic diagram of another circuit structure representing the acquisition module provided in an embodiment of the present invention;

[0052] Figure 5 This is a schematic diagram illustrating the operation of a data acquisition module according to an embodiment of the present invention;

[0053] Figure 6 This is another schematic diagram illustrating the operation of the data acquisition module provided in an embodiment of the present invention;

[0054] Figure 7 This is a schematic diagram of another structure representing the acquisition module provided in an embodiment of the present invention;

[0055] Figure 8 , Figure 9 and Figure 10 This is another schematic diagram illustrating the operation of the data acquisition module provided in this embodiment of the invention;

[0056] Figure 11 This is a schematic diagram of another structure representing the acquisition module provided in an embodiment of the present invention;

[0057] Figure 12 This is a schematic diagram of a control system for the display and acquisition circuit of another AC switch machine provided in an embodiment of the present invention;

[0058] Figure 13 This is a schematic diagram of another structure representing the acquisition module provided in an embodiment of the present invention;

[0059] Figure 14 This is a schematic diagram of a control system for the display and acquisition circuit of an AC switch machine according to another embodiment of the present invention;

[0060] Figure 15 , Figure 16 and Figure 17 This is another schematic diagram illustrating the operation of the data acquisition module provided in this embodiment of the invention;

[0061] Figure 18 , Figure 19 and Figure 20 This is another schematic diagram illustrating the operation of the data acquisition module provided in this embodiment of the invention;

[0062] Figure 21 This is a schematic diagram of a control system for the display and acquisition circuit of an AC switch machine provided in another embodiment of the present invention;

[0063] Figure 22 This is a schematic diagram of the structure of a display and acquisition circuit for an AC switch machine provided in another embodiment of the present invention;

[0064] Figure 23 This is a schematic diagram of the structure of a control device for an AC switch machine provided in an embodiment of the present invention. Detailed Implementation

[0065] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0066] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0067] Figure 1 This is a schematic diagram of the structure of a display and acquisition circuit for an AC switch machine provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the acquisition circuit 01 includes a first acquisition module 011, a second acquisition module 012, and a control module 013.

[0068] Specifically, the representation acquisition circuit 01 may include two representation acquisition modules to acquire representations from two AC switch machines respectively. The two representation acquisition modules are a first representation acquisition module 011 and a second representation acquisition module 012. The control module 013 is electrically connected to both the first and second representation acquisition modules, enabling the control module 013 to acquire representations from the two AC switch machines M through the first and second representation acquisition modules 011 and 012 respectively. For example, the first AC switch machine M1 can be acquired through the first representation acquisition module 011, and the second AC switch machine M2 can be acquired through the second representation acquisition module 012, thus meeting the field requirements for multiple AC switch machines. In the case where the representation acquisition circuit 01 represents and acquires data from two AC switch machines M respectively, the two AC switch machines M (i.e., the first AC switch machine M1 and the second AC switch machine M2) can be of the same type. For example, the first AC switch machine M1 and the second AC switch machine M2 can both be four-wire AC switch machines, or the first AC switch machine M1 and the second AC switch machine M2 can both be six-wire AC switch machines. Alternatively, the two AC switch machines M electrically connected to the first representation acquisition module 011 and the second representation acquisition module 012 can also be of different types. For example, one of the first AC switch machines M1 and the second AC switch machine M2 can be a four-wire AC switch machine, and the other can be a six-wire AC switch machine.

[0069] The first indicator represents the acquisition module 011 and the second indicator represents the acquisition module 012. Their circuit structures can be identical. Figure 2 This is a schematic diagram of a circuit structure representing a data acquisition module according to an embodiment of the present invention, such as... Figure 2As shown, both the first and second indicator acquisition modules 011 and 012 include: a transformer T, an indicator relay 10, a first current acquisition unit 20, a second current acquisition unit 30, a first unidirectional transmission circuit 40, a second unidirectional transmission circuit 50, a third unidirectional transmission circuit 60, and a fourth unidirectional transmission circuit 70; the transformer T includes a primary winding T1, a first secondary winding T21, and a second secondary winding T22; the indicator relay 10 includes a first indicator switch KA1, a second indicator switch KA2, a third indicator switch KA3, and a fourth indicator switch KA4; the first end of the first secondary winding T21 is electrically connected to the input end of the first unidirectional transmission circuit 40 and the output end of the second unidirectional transmission circuit 50 at the first node a, and the output ends of the first unidirectional transmission circuit 40 and the third unidirectional transmission circuit 60 are both electrically connected to the first end of the first indicator switch KA1; the first current acquisition unit 20, the second current acquisition unit 30, the first unidirectional transmission circuit 40, the second unidirectional transmission circuit 50, the third unidirectional transmission circuit 60, and the fourth unidirectional transmission circuit 70; the first current acquisition unit 20, the second unidirectional transmission circuit 50, the third unidirectional transmission circuit 60, and the fourth unidirectional transmission circuit 70. The first end of the first secondary winding T21 is electrically connected to the second end of the first secondary winding T22. The second end of the first current acquisition unit 20 is electrically connected to the first end of the second indicator switch KA2 at the second node b. The first end of the second secondary winding T22 is electrically connected to the input end of the third unidirectional transmission circuit 60 and the output end of the fourth unidirectional transmission circuit 70 at the third node c. The input end of the fourth unidirectional transmission circuit 70 and the input end of the second unidirectional transmission circuit 50 are electrically connected to the first end of the third indicator switch KA3. The first end of the second current acquisition unit 30 is electrically connected to the second end of the second secondary winding T22. The second end of the second current acquisition unit 30 is electrically connected to the first end of the fourth indicator switch KA4 at the fourth node d. The second ends of the first indicator switch KA1, the second indicator switch KA2, the third indicator switch KA3, and the fourth indicator switch KA4 are all electrically connected to the AC switch machine M. Figure 3 This is a schematic diagram of a control system for an AC switch machine's display and acquisition circuit, provided in an embodiment of the present invention, in conjunction with reference to [reference needed]. Figure 1 , Figure 2 and Figure 3 This indicates that the coil 10a of the relay 10 is electrically connected to the control module 013, and that the first current acquisition unit 20 and the second current acquisition unit 30 are both electrically connected to the control module 013. The control module 013 is used to output a first control signal to the coil 10a of the relay 10, and to acquire the indication acquisition signals provided by the first current acquisition unit 20 and the second current acquisition unit 30, and to detect the position of the AC switch machine M based on the indication acquisition signals.

[0070] Specifically, the primary winding T1 of transformer T is electrically connected to the AC power supply. Specifically, the first end of the primary winding T1 is electrically connected to the L-phase terminal of the AC power supply, and the second end of the primary winding T1 is electrically connected to the N-phase terminal of the AC power supply. Furthermore, a first fuse F1 can be installed between the first end of the primary winding T1 and the L-phase terminal of the AC power supply, and a second fuse F2 can be installed between the second end of the primary winding T1 and the N-phase terminal of the AC power supply.

[0071] Each indicator switch in the indicator relay 10 (first indicator switch KA1, second indicator switch KA2, third indicator switch KA3, and fourth indicator switch KA4) can be a normally open switch. One end of the coil 10a of the indicator relay 10 is electrically connected to the control module 013, and the other end is electrically connected to the ground terminal GND. When the control module 013 receives a command to perform indicator acquisition, it can output a corresponding first control signal to the coil 10a of the indicator relay 10 to energize the coil 10a and close each indicator switch. When it receives a command to stop indicator acquisition, it can output a corresponding first control signal to the coil 10a of the indicator relay 10 to de-energize the coil 10a and open each indicator switch.

[0072] The first unidirectional transmission circuit 40 transmits an electrical signal unidirectionally from the first end of the first secondary winding T21 to the first indicator switch KA1 when the circuit is turned on. The second unidirectional transmission circuit 50 transmits an electrical signal unidirectionally from the third indicator switch KA3 to the first end of the first secondary winding T21 when the circuit is turned on. The third unidirectional transmission circuit 60 transmits an electrical signal unidirectionally from the first end of the second secondary winding T22 to the first indicator switch KA1 when the circuit is turned on. The fourth unidirectional transmission circuit 70 transmits an electrical signal unidirectionally from the third indicator switch KA3 to the first end of the second secondary winding T22 when the circuit is turned on. Based on the unidirectional conduction characteristics of each unidirectional transmission circuit (first unidirectional transmission circuit 40, second unidirectional transmission circuit 50, third unidirectional transmission circuit 60, and fourth unidirectional transmission circuit 70), the AC signal provided by the transformer T enables the corresponding unidirectional transmission circuit to conduct during the positive and negative half-cycles. For example, when the current flowing through the first secondary winding T21 causes the potential at its first end to be higher than the potential at its second end, the first unidirectional transmission circuit 40 is turned on and the second unidirectional transmission circuit 50 is turned off; when the current flowing through the first secondary winding T21 causes the potential at its first end to be lower than the potential at its second end, the first unidirectional transmission circuit 40 is turned off and the second unidirectional transmission circuit 50 is turned on. When the current flowing through the second secondary winding T22 causes the potential at its first end to be higher than the potential at its second end, the third unidirectional transmission circuit 60 is turned on and the fourth unidirectional transmission circuit 70 is turned off; when the current flowing through the second secondary winding T22 causes the potential at its first end to be lower than the potential at its second end, the third unidirectional transmission circuit 60 is turned off and the fourth unidirectional transmission circuit 70 is turned on. Based on the current position of the AC switch machine M, the first secondary winding T21 and the second secondary winding T22 of the transformer T can cooperate with each unidirectional transmission circuit to form corresponding current paths. Furthermore, the current paths formed by the AC switch machine M differ depending on its position, allowing the first current acquisition unit 20 and the second current acquisition unit 30 to acquire corresponding current signals, such as the direction of the current signal. Thus, the control module 30 can acquire the current signals from the first current acquisition unit 20 and the second current acquisition unit 30 as indication signals, and after acquiring the indication signals, it can detect the current position of the AC switch machine M based on the indication signals.

[0073] For example, Figure 4 This is another circuit structure diagram of the acquisition module provided in an embodiment of the present invention, such as... Figure 4As shown, the first unidirectional transmission circuit 40 includes a first diode D1, the second unidirectional transmission circuit 50 includes a second diode D2, the third unidirectional transmission circuit 60 includes a third diode D3, and the fourth unidirectional transmission circuit 70 includes a fourth diode D4. The anode of the first diode D1 is electrically connected to the first node a, and the cathode of the first diode D1 is electrically connected to the first terminal of the first indicator switch KA1. The cathode of the second diode D2 is electrically connected to the first node a, and the anode of the second diode D2 is electrically connected to the first terminal of the third indicator switch KA3. The anode of the third diode D3 is electrically connected to the third node c, and the cathode of the third diode D3 is electrically connected to the first terminal of the first indicator switch KA1. The cathode of the fourth diode D4 is electrically connected to the third node c, and the anode of the fourth diode D4 is electrically connected to the first terminal of the third indicator switch KA3. Thus, each unidirectional transmission circuit can achieve unidirectional transmission of electrical signals through the unidirectional conduction principle of the diodes.

[0074] The AC switch machine indication acquisition circuit provided in this embodiment of the invention, by setting up a first indication acquisition module, a second indication acquisition module, and a control module, enables the control module to acquire indications of one AC switch machine through the first indication acquisition module and to acquire indications of another AC switch machine through the second indication acquisition module. This meets the on-site requirements of multiple AC switch machines in a station. Both the first and second indication acquisition modules include a transformer, an indication relay, a first current acquisition unit, a second current acquisition unit, a first unidirectional transmission circuit, a second unidirectional transmission circuit, a third unidirectional transmission circuit, and a fourth unidirectional transmission circuit. With the coordination of the AC switch machine's position status and the various unidirectional transmission circuits, the first and second secondary windings of the transformer can cooperate with the unidirectional transmission circuits to form corresponding current paths. This allows the first and second current acquisition units to acquire the corresponding current signals, enabling the control module to obtain the indication signals of the AC switch machine. Furthermore, the position of the AC switch machine can be detected based on these indication signals, and the state of the indication acquisition module can be controlled by controlling the state of the indication relay. The circuit principle is simple and easy to set up, improving the accuracy of AC switch machine position detection and contributing to enhanced station turnout safety.

[0075] Optional, refer to the reference Figure 2 and Figure 3 or in conjunction with references Figure 3 and Figure 4 The figure indicates that the relay 10 further includes at least one detection switch. An exemplary illustration shows the relay 10 including two detection switches (i.e., a first detection switch KB1 and a second detection switch KB2), but this is not a limitation. The first terminal of the detection switch is electrically connected to the control module 013, and the second terminal of the detection switch receives a fixed voltage signal VCC.

[0076] Specifically, before data acquisition, each indicator switch in the indicator relay can be self-tested, or during data acquisition, each indicator switch in the indicator relay can be self-tested in real time. At this time, the control module 013 can determine whether the detection switch can open and close normally through the electrical signals at each detection switch terminal, thereby indirectly detecting each indicator switch and avoiding errors in the acquired indicator signal caused by indicator switch failure. The fixed voltage signal VCC can be provided by the control module 013. Furthermore, when the indicator relay 10 includes a first detection switch KB1 and a second detection switch KB2, one of the first detection switch KB1 and the second detection switch KB2 can be set as a normally open switch and the other as a normally closed switch.

[0077] Optional, refer to the reference Figure 3 and Figure 4 The first current acquisition unit 20 includes a first acquisition optocoupler OC1, a second acquisition optocoupler OC2, and a first acquisition resistor Rc1. The first acquisition resistor Rc1 is electrically connected between the second end of the first secondary winding T21 and the second node b. The input terminal of the first acquisition optocoupler OC1 is electrically connected to the second node b, and the output terminal of the first acquisition optocoupler OC1 is electrically connected to the second end of the first secondary winding T21. The input terminal of the second acquisition optocoupler OC2 is electrically connected to the second end of the first secondary winding T21, and the output terminal of the second acquisition optocoupler OC2 is electrically connected to the second node b. Both the first acquisition optocoupler OC1 and the second acquisition optocoupler OC2 are also electrically connected to the control module 013.

[0078] Specifically, when all indicator switches are on, the current flowing through the first secondary winding T21 flows from the first end to the second end. That is, when the potential at the first end of the first secondary winding T21 is lower than the potential at the second end, the second acquisition optocoupler OC2 can acquire the half-wave current flowing through the first acquisition resistor Rc1, while the first acquisition optocoupler OC1 cannot acquire the half-wave current flowing through the first acquisition resistor Rc1. Conversely, when the current flowing through the first secondary winding T21 flows from the second end to the first end, that is, when the potential at the first end of the first secondary winding T21 is higher than the potential at the second end, the first acquisition optocoupler OC1 can acquire the half-wave current flowing through the first acquisition resistor Rc1, while the second acquisition optocoupler OC2 cannot acquire the half-wave current flowing through the first acquisition resistor Rc1. The current signals acquired by the first acquisition optocoupler OC1 and the second acquisition optocoupler OC2 are the indicator signals, allowing the control module 013 to perform position detection based on the current signals acquired by the first acquisition optocoupler OC1 and the second acquisition optocoupler OC2.

[0079] The second current acquisition unit 30 includes a third acquisition optocoupler OC3, a fourth acquisition optocoupler OC4, and a second acquisition resistor Rc2; the second acquisition resistor Rc2 is electrically connected between the second end of the second secondary winding T22 and the fourth node d; the input end of the third acquisition optocoupler OC3 is electrically connected to the fourth node d, and the output end of the third acquisition optocoupler OC3 is electrically connected to the second end of the second secondary winding T22; the input end of the fourth acquisition optocoupler OC4 is electrically connected to the second end of the second secondary winding T22, and the output end of the fourth acquisition optocoupler OC4 is electrically connected to the fourth node d; both the third acquisition optocoupler OC3 and the fourth acquisition optocoupler OC4 are also electrically connected to the control module 013.

[0080] Based on the same principle, when all the indicator switches are on, the current flowing through the second secondary winding T22 flows from the first end to the second end. That is, when the potential of the first end of the second secondary winding T22 is lower than the potential of the second end, the fourth acquisition optocoupler OC4 can acquire the half-wave current flowing through the second acquisition resistor Rc2, while the third acquisition optocoupler OC3 cannot acquire the half-wave current flowing through the second acquisition resistor Rc2. Conversely, when the current flowing through the second secondary winding T22 flows from the second end to the first end, that is, when the potential of the first end of the second secondary winding T22 is higher than the potential of the second end, the third acquisition optocoupler OC3 can acquire the half-wave current flowing through the second acquisition resistor Rc2, while the fourth acquisition optocoupler OC4 cannot acquire the half-wave current flowing through the second acquisition resistor Rc2. The current signals acquired by the third acquisition optocoupler OC3 and the fourth acquisition optocoupler OC4 are the indication signals, enabling the control module 013 to perform position detection based on the current signals acquired by the third acquisition optocoupler OC3 and the fourth acquisition optocoupler OC4.

[0081] The display acquisition circuit can acquire the display data of AC switch machines with different wiring systems. The connection method between the display acquisition module and the AC switch machine may be different for different wiring systems. The following embodiments use the display acquisition module to acquire the display data of a four-wire AC switch machine and the display acquisition module to acquire the display data of a six-wire AC switch machine as examples for illustrative description.

[0082] Figure 5 This is a schematic diagram illustrating the operation of a data acquisition module according to an embodiment of the present invention, such as... Figure 5As shown, the four-wire AC switch machine MF includes four connecting cables and two turnout switches. The four connecting cables are designated as first connecting cable XF1, second connecting cable XF2, third connecting cable XF3, and fourth connecting cable XF4. First connecting cable XF1 is electrically connected to the U-phase winding of the motor; second connecting cable XF2 is electrically connected to the V-phase winding of the motor; third connecting cable XF3 is electrically connected to the N-phase terminal of the motor (not shown in the figure); and fourth connecting cable XF4 is electrically connected to the W-phase winding of the motor. The two turnout switches are designated as first turnout switch m1 and second turnout switch m2.

[0083] The first turnout switch m1 includes a left-position first contact a1, a left-position second contact a2, a right-position first contact b1, and a right-position second contact b2. The left-position first contact a1 and the right-position first contact b1 are electrically connected. When the first turnout switch m1 is in the left position, the left-position first contact a1 and the left-position second contact a2 are connected; when the first turnout switch m1 is in the right position, the right-position first contact b1 and the right-position second contact b2 are connected (not shown here). Similarly, the second turnout switch m2 includes a left-position third contact a3, a left-position fourth contact a4, a right-position third contact b3, and a right-position fourth contact b4. The left-position third contact a3 and the right-position third contact b3 are electrically connected. Based on this, when the second turnout switch M2 is in the left position, the left-position third contact a3 and the left-position fourth contact a4 are connected; when the second turnout switch M2 is in the right position, the right-position third contact b3 and the right-position fourth contact b4 are connected (not shown here). Specifically, the right-position second contact b2 of the first turnout switch M1 is electrically connected to the left-position fourth contact a4 of the second turnout switch M2, and the left-position second contact a2 of the first turnout switch M1 is electrically connected to the right-position fourth contact b4 of the second turnout switch M2.

[0084] The first wiring cable XF1 is electrically connected to the third left contact a3 via the U-phase winding. The third wiring cable XF3 is electrically connected to the right second contact b2 and the left fourth contact a4. The second wiring cable XF2 is electrically connected to the right first contact b1 via the V-phase winding. The fourth wiring cable XF4 is electrically connected to the left second contact a2 via the W-phase winding.

[0085] The above provides an exemplary description of the internal connection of a four-wire AC switch machine MF. Thus, when the four-wire AC switch machine MF is running, the different positions of the two turnout switches in the four-wire AC switch machine MF will form different current paths. By detecting the current signal of the current path, the position of the four-wire AC switch machine MF can be determined based on the current signal.

[0086] Continue to refer to Figure 5When the AC switch M is a four-wire AC switch MF, the second terminal of the first indicator switch KA1 is electrically connected to the fourth wiring cable XF4 of the four-wire AC switch MF, the second terminal of the second indicator switch KA2 is electrically connected to the second wiring cable XF2 of the four-wire AC switch MF, the second terminal of the third indicator switch KA3 is electrically connected to the third wiring cable XF3 of the four-wire AC switch MF, and the second terminal of the fourth indicator switch KA4 is electrically connected to the first wiring cable XF1 of the four-wire AC switch MF.

[0087] Based on this, when the position of the four-wire AC switch machine MF is as follows: Figure 5 When the switch is in the left position as shown, both the first turnout switch m1 and the second turnout switch m2 are in the left position. Therefore, with all indicator switches conducting, the first secondary winding T21 and the second secondary winding T22 of the transformer T can only form current paths when the current flowing through the first secondary winding T21 is from the second end to the first end, and the current flowing through the second secondary winding T22 is from the first end to the second end. Specifically, the current flows from the second end of the first secondary winding T21 to the first end and sequentially flows through the first unidirectional transmission circuit 40, the first indicator switch KA1, the fourth wiring cable XF4 of the four-wire AC switch machine MF, the second wiring cable XF2 of the four-wire AC switch machine MF, the second indicator switch KA2, and the first acquisition resistor Rc1 until a current path is formed at the second end of the first secondary winding T21 (i.e.,...). Figure 5 The red current path shown in the diagram), and the current flows from the first end of the second secondary winding T22 to the second end and sequentially through the second detection resistor Rc2, the fourth indicator switch KA4, the first wiring cable XF1 of the four-wire AC switch machine MF, the third wiring cable XF3 of the four-wire AC switch machine MF, the third indicator switch KA3 and the fourth unidirectional transmission circuit 70 until the first end of the second secondary winding T22 forms another current path (i.e. Figure 5 (The blue current path is shown in the diagram). At this time, the first detection optocoupler OC1 outputs a half-wave current based on the current flowing through the first detection resistor Rc1, and the fourth detection optocoupler OC4 can output a half-wave current based on the current flowing through the second detection resistor Rc2, while the second detection optocoupler OC2 and the third detection optocoupler OC3 cannot collect a current signal. Therefore, when the first detection optocoupler OC1 and the fourth detection optocoupler OC4 detect the half-wave current, while the second detection optocoupler OC2 and the third detection optocoupler OC3 cannot collect a current signal, it can be determined that the current position of the four-wire AC switch machine MF is the left position.

[0088] For example, Figure 6 This is another schematic diagram illustrating the operation of the data acquisition module provided in an embodiment of the present invention, such as... Figure 6As shown, when the four-wire AC switch machine MF is in the middle position, the first turnout switch m1 is in the left position and the second turnout switch m2 is in the right position. At this time, the first secondary winding T21 and the second secondary winding T22 of the transformer T can only form current paths when the current flowing through the first secondary winding T21 is from its second end to its first end, and the current flowing through the second secondary winding T22 is from its first end to its second end. Specifically, the current flows from the second end of the first secondary winding T21 to the first end and sequentially through the first unidirectional transmission circuit 40, the first indicator switch KA1, the fourth wiring cable XF4 of the four-wire AC switch machine MF, the second wiring cable XF2 of the four-wire AC switch machine MF, the second indicator switch KA2, and the first detection resistor Rc1 until a current path is formed at the second end of the first secondary winding T21 (i.e.,...). Figure 6 The red current path shown in the diagram); and the current flows from the second end of the second secondary winding T22 to the first end and sequentially through the third unidirectional transmission circuit 60, the first indicator switch KA1, the fourth wiring cable XF4 of the four-wire AC switch machine MF, the first wiring cable XF1 of the four-wire AC switch machine MF, the fourth indicator switch KA4, and the second detection resistor Rc2 until it reaches the second end of the second secondary winding T22 to form another current path (i.e. Figure 6 (The blue current path is shown in the diagram). At this time, the first detection optocoupler OC1 outputs a half-wave current based on the current flowing through the first detection resistor Rc1, and the third detection optocoupler OC3 can output a half-wave current based on the current flowing through the second detection resistor Rc2, while the second detection optocoupler OC2 and the fourth detection optocoupler OC4 cannot acquire a current signal. Therefore, when the first detection optocoupler OC1 and the third detection optocoupler OC3 can detect the half-wave current, while the second acquisition optocoupler OC2 and the fourth acquisition optocoupler OC4 cannot acquire a half-wave current, the current position of the four-wire AC switch machine MF can be determined to be the middle position, thus enabling position detection of the four-wire AC switch machine MF.

[0089] Figure 7 This is another schematic diagram illustrating the operation of the data acquisition module provided in this embodiment of the invention, such as... Figure 7As shown, when the four-wire AC switch machine MF is in the right position, both the first turnout switch m1 and the second turnout switch m2 are in the right position. At this time, the first secondary winding T21 and the second secondary winding T22 of the transformer T can only form current paths when the current flowing through the first secondary winding T21 is from its first end to its second end, and the current flowing through the second secondary winding T22 is from its second end to its first end. Specifically, the current flows from the first end of the first secondary winding T21 to the second end and sequentially through the first detection resistor Rc1, the second indicator switch KA2, the second wiring cable XF2 of the four-wire AC switch machine MF, the third wiring cable XF3 of the four-wire AC switch machine MF, the third indicator switch KA3, and the second unidirectional transmission circuit 50 until a current path is formed at the first end of the first secondary winding T21 (i.e.,...). Figure 7 The red current path shown in the diagram); and the current flows from the second end of the second secondary winding T22 to the first end and sequentially through the third unidirectional transmission circuit 60, the first indicator switch KA1, the fourth wiring cable XF4 of the four-wire AC switch machine MF, the first wiring cable XF1 of the four-wire AC switch machine MF, the fourth indicator switch KA4, and the second detection resistor Rc2 until the second end of the second secondary winding T22 forms another current path (i.e. Figure 7 (The blue current path is shown in the diagram). At this time, the second detection optocoupler OC2 outputs a half-wave current based on the current flowing through the first detection resistor Rc1, and the third detection optocoupler OC3 can output a half-wave current based on the current flowing through the second detection resistor Rc2, while the first detection optocoupler OC1 and the fourth detection optocoupler OC4 cannot acquire a current signal. Therefore, when the second acquisition optocoupler OC2 and the third detection optocoupler OC3 can detect the half-wave current, while the first detection optocoupler OC1 and the fourth acquisition optocoupler OC4 cannot acquire a half-wave current, it can be determined that the current position of the four-wire AC switch machine MF is the right position. In summary, the position detection of the four-wire AC switch machine MF is achieved through the first indicator acquisition module 011 and the second indicator acquisition module 012.

[0090] Figure 8 , Figure 9 and Figure 10 This is another schematic diagram illustrating the operation of the data acquisition module provided in this embodiment of the invention, see reference. Figure 18 , Figure 9 and Figure 10In any of the attached diagrams, the six-wire AC switch machine MS includes six connecting cables and six turnout switches. The six connecting cables are designated as first connecting cable XS1, second connecting cable XS2, third connecting cable XS3, fourth connecting cable XS4, fifth connecting cable XS5, and sixth connecting cable XS6. The six turnout switches ms1 to ms6 include twelve left-position contacts d1 to d12 and twelve right-position contacts c1 to c12. The first right-position contact c1 and the seventh left-position contact d7 are electrically connected to the sixth node n6, and the sixth node n6 is electrically connected to the sixth wiring cable XS6; the second right-position contact c2 is electrically connected to the ninth right-position contact c9; the third right-position contact c3 is electrically connected to the tenth node n10 and the ninth left-position contact d9; the fourth right-position contact c4 is electrically connected to the second node n2 and the fourth left-position contact d4, and the second node n2 is electrically connected to the second wiring cable XS2; the fifth right-position contact c5 is electrically connected to the eleventh left-position contact d11, and the eleventh left-position contact d11 is electrically connected to the W-phase winding through the safety operation switch K0. When maintenance of the six-wire AC switch machine MF is required, the safety operation switch K0 can be opened to ensure that the six-wire AC switch machine MF is in a de-energized state, ensuring safe operation for the operator; the sixth right-position contact c6 is electrically connected to the fifth node n5 and the sixth left-position contact d6, and the... Node n5 is electrically connected to the fifth wiring cable XS5; the first left contact d1 is electrically connected to the ninth node n9; the second left contact d2 is electrically connected to the tenth node n10 and the eighth right contact c8, and the tenth node n10 is also electrically connected to the V phase winding; the third left contact d3 is electrically connected to the eighth left contact d8; the fifth left contact d5 is electrically connected to the seventh node n7; the seventh right contact c7 is electrically connected to the eighth node n8; the tenth right contact c10 is electrically connected to the tenth left contact d10, and the tenth left contact d10 is electrically connected to the third node n3, and the third node n3 is electrically connected to the third wiring cable XS3; the twelfth right contact c12 is electrically connected to the twelfth left contact d12, and the twelfth left contact d12 is electrically connected to the fourth node n4, and the fourth node n4 is electrically connected to the fourth wiring cable XS4; the first wiring cable XS1 is electrically connected to the U phase winding through the first node n1. The U-phase winding, V-phase winding, and W-phase winding are connected in a star configuration.

[0091] The above describes the connection method in a six-wire AC switch machine (MS). Based on this, when the six-wire AC switch machine (MS) is in the right position, all left-position contacts and right-position contacts in each turnout switch are closed (e.g., ...). Figure 8 (As shown); When the six-wire AC switch machine MS is in the left position, all left-position contacts in each turnout switch are closed and all right-position contacts are open (as shown). Figure 10(As shown); When the six-wire AC switch machine MS is in the middle position, the left contacts of turnout switches ms1 to ms3 are all open and the right contacts are all closed, and the left contacts of turnout switches ms4 to ms6 are all closed and the right contacts are all open (as shown). Figure 9 (As shown).

[0092] Continue to refer to Figure 8 , Figure 9 and Figure 10 In any of the attached figures, when the AC switch machine M is a six-wire AC switch machine MS, the first indicates that the second terminal of switch KA1 is electrically connected to the first wiring cable of the six-wire AC switch machine MS; the second indicates that the second terminal of switch KA2 is electrically connected to the second wiring cable XS2 of the six-wire AC switch machine MS; the third indicates that the second terminal of switch KA3 is electrically connected to the sixth wiring cable XS6 of the six-wire AC switch machine MS; the fourth indicates that the second terminal of switch KA4 is electrically connected to the third wiring cable XS3 of the six-wire AC switch machine MS; and the fourth wiring cable XS4 and the fifth wiring cable XS5 of the six-wire AC switch machine MS are both left unconnected.

[0093] Then refer to Figure 8 When the six-wire AC switch MS is in the right position, the first secondary winding T21 and the second secondary winding T22 of the transformer T can only form current paths when the current flowing through the first secondary winding T21 is from its second end to its first end, and the current flowing through the second secondary winding T22 is from its first end to its second end. Specifically, the current flows from the second end of the first secondary winding T21 to the first end and sequentially flows through the first unidirectional transmission circuit 40, the first indicator switch KA1, the first wiring cable XS1 of the six-wire AC switch MS, the second wiring cable XS2 of the six-wire AC switch MS, the second indicator switch KA2, the first detection resistor Rc1, until a current path is formed at the second end of the first secondary winding T21 (i.e., Figure 8 The red current path shown in the diagram); and the current flows from the first end of the second secondary winding T22 to the second end and sequentially through the second detection resistor Rc2, the fourth indicator switch KA4, the third wiring cable XS3 of the six-wire AC switch machine MS, the sixth wiring cable XS6 of the six-wire AC switch machine MS, the third indicator switch KA3 and the fourth unidirectional transmission circuit 70. The first end of the second secondary winding T22 forms another current path (i.e. Figure 8(The blue current path is shown in the diagram). At this time, the first detection optocoupler OC1 outputs a half-wave current based on the current flowing through the first detection resistor Rc1, and the fourth detection optocoupler OC4 can output a half-wave current based on the current flowing through the second detection resistor Rc2, while the second detection optocoupler OC2 and the third detection optocoupler OC3 cannot acquire a current signal. Therefore, when the first detection optocoupler OC1 and the fourth acquisition optocoupler OC4 can detect the half-wave current, while the second acquisition optocoupler OC2 and the third detection optocoupler OC3 cannot acquire a half-wave current, it can be determined that the current position of the six-wire AC switch machine MS is the right position.

[0094] refer to Figure 9 When the six-wire AC switch machine MS is in the middle position, the first secondary winding T21 and the second secondary winding T22 of the transformer T can only form current paths when the current flowing through the first secondary winding T21 is from its second end to its first end, and the current flowing through the second secondary winding T22 is from its second end to its first end. Specifically, the current flows from the second end of the first secondary winding T21 to the first end and sequentially flows through the first unidirectional transmission circuit 40, the first indicator switch KA1, the first wiring cable XS1 of the six-wire AC switch machine MS, the second wiring cable XS2 of the six-wire AC switch machine MS, the second indicator switch KA2, and the first detection resistor Rc1 until a current path is formed at the second end of the first secondary winding T21 (i.e., Figure 9 The red current path shown in the diagram); and the current flows from the second end of the second secondary winding T22 to the first end, sequentially through the third unidirectional transmission circuit 60, the first indicator switch KA1, the first wiring cable XS1 of the six-wire AC switch machine MS, the third wiring cable XS3 of the six-wire AC switch machine MS, the fourth indicator switch KA4, and the second detection resistor Rc2 until it reaches the second end of the second secondary winding T22, forming another current path (i.e., Figure 9 (The blue current path is shown in the diagram). At this time, the first detection optocoupler OC1 outputs a half-wave current based on the current flowing through the first detection resistor Rc1, and the third detection optocoupler OC3 can output a half-wave current based on the current flowing through the second detection resistor Rc2, while the second detection optocoupler OC2 and the fourth detection optocoupler OC4 cannot acquire a current signal. Therefore, when the first detection optocoupler OC1 and the third detection optocoupler OC3 can detect the half-wave current, while the second acquisition optocoupler OC2 and the fourth acquisition optocoupler OC4 cannot acquire a half-wave current, it can be determined that the current position of the six-wire AC switch machine MS is the middle position.

[0095] refer to Figure 10When the six-wire AC switch MS is in the left position, the first secondary winding T21 and the second secondary winding T22 of the transformer T can only form current paths when the current flowing through the first secondary winding T21 is from its first end to its second end, and the current flowing through the second secondary winding T22 is from its second end to its first end. Specifically, the current flows from the first end of the first secondary winding T21 to the second end and sequentially flows through the first detection resistor Rc1, the second indicator switch KA2, the second wiring cable XS2 of the six-wire AC switch MS, the sixth wiring cable XS6 of the six-wire AC switch MS, the third indicator switch KA3, and the second unidirectional transmission circuit 50 until a current path is formed at the first end of the first secondary winding T21 (i.e., Figure 10 The red current path shown in the diagram); and the current flows from the second end of the second secondary winding T22 to the first end and sequentially through the third unidirectional transmission circuit 60, the first indicator switch KA1, the first wiring cable XS1 of the six-wire AC switch machine MS, the third wiring cable XS3 of the six-wire AC switch machine MS, the fourth indicator switch KA4, and the second detection resistor Rc2 until it reaches the second end of the second secondary winding T22 to form another current path (i.e., Figure 10 (The blue current path is shown in the diagram). At this time, the second detection optocoupler OC2 outputs a half-wave current based on the current flowing through the first detection resistor Rc1, and the third detection optocoupler OC3 can output a half-wave current based on the current flowing through the second detection resistor Rc2, while the first detection optocoupler OC1 and the fourth detection optocoupler OC4 cannot acquire a current signal. Therefore, when the second acquisition optocoupler OC2 and the third detection optocoupler OC3 can detect the half-wave current, while the first detection optocoupler OC1 and the fourth acquisition optocoupler OC4 cannot acquire a half-wave current, it can be determined that the current position of the six-wire AC switch machine MS is left-hand. In summary, the position detection of the six-wire AC switch machine MS is achieved through the first indicator acquisition module 011 and the second indicator acquisition module 012.

[0096] Optional, see reference Figures 4 to 10 Any of the attached figures and Figure 3 The first data acquisition module 011 and the second data acquisition module 012 each include: a first protection switch K1 and a second protection switch K2; the first protection switch K1 is electrically connected between the second end of the first secondary winding T21 and the first end of the first current acquisition unit 20; the second protection switch K2 is electrically connected between the second end of the second secondary winding T22 and the first end of the second current acquisition unit 30; the first protection switch K1 and the second protection switch K2 are also electrically connected to the control module 013; the control module 013 is also used to output a second control signal to the first protection switch K1 and the second protection switch K2 to control the first protection switch K1 and the second protection switch K2 to be turned on or off.

[0097] Specifically, when the control module 013 receives a command to perform data acquisition, it can first control the closing of each indicator switch of the indicator relay 10, and then control the conduction of the first protection switch K1 and the second protection switch K2. This ensures that each indicator switch closes without being energized, preventing arcing and damage to the indicator switches when they are energized. Similarly, when the control module 013 receives a command to stop data acquisition, it can first control the opening of the first protection switch K1 and the second protection switch K2, and then control the opening of each indicator switch of the indicator relay 10. This prevents the indicator switches of the indicator relay 10 from operating while energized, thus protecting the indicator relay 10.

[0098] The above illustrates the structure of a representation acquisition module and a method for performing representation acquisition and position detection on an AC switch machine using the representation acquisition module. In other feasible embodiments of the present invention, the representation acquisition module may also include other circuit structures.

[0099] Optional, Figure 11 This is a schematic diagram of another structure representing the acquisition module provided in an embodiment of the present invention. Figure 12 This is a schematic diagram of a control system for the display and acquisition circuit of another AC switch machine provided in an embodiment of the present invention, in conjunction with reference to the reference. Figure 11 and Figure 12 The first data acquisition module 011 and the second data acquisition module 012 each include: a first self-test switch K3 and a second self-test switch K4; the first self-test switch K3 is electrically connected between the first node a and the second node b; the second self-test switch K4 is electrically connected between the third node c and the fourth node d; the first self-test switch K3 and the second self-test switch K4 are also electrically connected to the control module 013; the control module 013 is also used to output a third control signal to the first self-test switch K3 and the second self-test switch K4 to control the first self-test switch K3 and the second self-test switch K4 to be turned on or off.

[0100] Specifically, before acquiring the data from the AC switch machine M, a self-test can be performed on the acquisition module to check whether each component in the circuit is functioning properly, thus avoiding errors in the test results due to component failure. During the self-test, each indicator switch of the indicator relay 10 can be kept in the off state, while the first self-test switch K3 and the second self-test switch K4 can be kept in the on state. When the first acquisition module 011 and the second acquisition module 012 include the first protection switch K1 and the second protection switch K2, the first protection switch K1 and the second protection switch K2 can be kept in the on state simultaneously. At this time, when the current flowing through the first secondary winding T21 is from its first end to its second end, the current flows from the first end of the first secondary winding T21 to the second end and sequentially flows through the first protection switch K1, the first detection resistor Rc1 and the third electronic switch K3 until the first end of the first secondary winding T21 forms a current path. At this time, the second detection optocoupler OC2 can output a half-wave current according to the current flowing through the first detection resistor Rc1. When the current flowing through the first secondary winding T21 is from its second end to its first end, the current flows from the second end of the first secondary winding T21 to the first end and sequentially flows through the first self-test switch K3, the first detection resistor Rc1 and the first protection switch K1 until the second end of the first secondary winding T21 forms a current path. At this time, the first detection optocoupler OC1 can output a half-wave current according to the current flowing through the first detection resistor Rc1. When the current flowing through the second secondary winding T22 is from its first end to its second end, the current flows from the first end to the second end of the second secondary winding T22 and sequentially flows through the second protection switch K2, the second detection resistor Rc2, and the second self-test switch K4 until it reaches the first end of the second secondary winding T22 to form a current path. At this time, the fourth detection optocoupler OC4 can output a half-wave current based on the current flowing through the second detection resistor Rc2. When the current flowing through the second secondary winding T22 is from its second end to its first end, the current flows from the second end to the first end of the second secondary winding T22 and sequentially flows through the second self-test switch K4, the second detection resistor Rc2, and the second protection switch K2 to form a current path. At this time, the third detection optocoupler OC3 can output a half-wave current based on the current flowing through the second detection resistor Rc2.Accordingly, when all the indicator switches of the relay 10 remain in the open state, and the first protection switch K1, the second protection switch K2, the first self-test switch K3, and the second self-test switch K4 are in the on state, and the first secondary winding T21 and the second secondary winding T22 continuously provide AC current, the first detection optocoupler OC1, the second detection optocoupler OC2, the third detection optocoupler OC3, and the fourth detection optocoupler OC4 can all detect the half-wave current. If at least one of the detection optocouplers fails to detect the half-wave current, there is a detection optocoupler fault or an electronic switch fault (i.e., the first protection switch K1, the second protection switch K2, the first self-test switch K3, and the fourth self-test switch K4). At this time, the control module 013 can output an alarm prompt to facilitate timely maintenance by the operator.

[0101] Optional, Figure 13 This is a schematic diagram of another structure representing the acquisition module provided in an embodiment of the present invention. Figure 14 This is a schematic diagram of a control system for the display and acquisition circuit of an AC switch machine according to another embodiment of the present invention, in conjunction with reference to the reference. Figure 13 and Figure 14 The first current acquisition module 011 and the second current acquisition module 012 each include: a third current acquisition unit 80 and a fourth current acquisition unit 90; the third current acquisition unit 80 is electrically connected between the second node b and the first end of the second indicator switch KA2; the fourth current acquisition unit 90 is electrically connected between the fourth node d and the first end of the fourth indicator switch KA4; the third current acquisition unit 80 and the fourth current acquisition unit 90 are also electrically connected to the control module 013.

[0102] Specifically, by setting the third current acquisition unit 80 electrically connected between the first current acquisition unit 20 and the second indication switch KA2, and setting the fourth current acquisition unit 90 electrically connected between the second current acquisition unit 30 and the fourth indication switch KA4, the indication signals acquired by the third current acquisition unit 80 and the first current acquisition unit 20 can be mutually verified, as can the indication signals acquired by the fourth current acquisition unit 90 and the second current acquisition unit 30. This can further improve the accuracy of the acquired indication signals, thereby improving the accuracy of the AC switch machine M position detection.

[0103] Optional, continue to refer to Figure 13 and Figure 14The third current acquisition unit 80 includes: a fifth acquisition optocoupler OC5, a sixth acquisition optocoupler OC6, and a third acquisition resistor Rc3; the third acquisition resistor Rc3 is electrically connected between the second node b and the first terminal of the second indicator switch KA2; the input terminal of the fifth acquisition optocoupler OC5 is electrically connected to the first terminal of the second indicator switch KA2, and the output terminal of the fifth acquisition optocoupler OC5 is electrically connected to the second node b; the input terminal of the sixth acquisition optocoupler OC6 is electrically connected to the second node b, and the output terminal of the sixth acquisition optocoupler OC6 is electrically connected to the first terminal of the second indicator switch KA2; both the fifth acquisition optocoupler OC5 and the sixth acquisition optocoupler OC6 are also electrically connected to the control module 013.

[0104] Specifically, when the first protection switch K1, the second protection switch K2, and all indicator switches are on, and the first self-test switch K3 and the second self-test switch K4 are off, when the current flowing through the first secondary winding T21 is from its first end to its second end, the sixth acquisition optocoupler OC6 can acquire the half-wave current flowing through the third acquisition resistor Rc3, while the fifth acquisition optocoupler OC5 cannot acquire the half-wave current flowing through the third acquisition resistor Rc3. Conversely, when the current flowing through the first secondary winding T21 is from its second end to its first end, the fifth acquisition optocoupler OC5 can acquire the half-wave current flowing through the third acquisition resistor Rc3, while the sixth acquisition optocoupler OC6 cannot acquire the half-wave current flowing through the third acquisition resistor Rc3. The current signals acquired by the fifth acquisition optocoupler OC5 and the sixth acquisition optocoupler OC6 are the indicator signals, enabling the control module 013 to perform position detection based on the current signals acquired by the fifth acquisition optocoupler OC5 and the sixth acquisition optocoupler OC6.

[0105] The fourth current acquisition unit 90 includes: a seventh acquisition optocoupler OC7, an eighth acquisition optocoupler OC8, and a fourth acquisition resistor Rc4; the fourth acquisition resistor Rc4 is electrically connected between the fourth node d and the first terminal of the fourth indicator switch KA4; the input terminal of the seventh acquisition optocoupler OC7 is electrically connected to the first terminal of the fourth indicator switch KA4, and the output terminal of the seventh acquisition optocoupler OC7 is electrically connected to the fourth node d; the input terminal of the eighth acquisition optocoupler OC8 is electrically connected to the fourth node d, and the output terminal of the eighth acquisition optocoupler OC8 is electrically connected to the first terminal of the fourth indicator switch KA4; both the seventh acquisition optocoupler OC7 and the eighth acquisition optocoupler OC8 are also electrically connected to the control module 013.

[0106] Similarly, when the first protection switch K1, the second protection switch K2, and all indicator switches are on, and the first self-test switch K3 and the second self-test switch K4 are off, when the current flowing through the second secondary winding T22 is from its first end to its second end, the eighth acquisition optocoupler OC8 can acquire the half-wave current flowing through the fourth acquisition resistor Rc4, while the seventh acquisition optocoupler OC7 cannot acquire the half-wave current flowing through the fourth acquisition resistor Rc4. Conversely, when the current flowing through the second secondary winding T22 is from its second end to its first end, the seventh acquisition optocoupler OC7 can acquire the half-wave current flowing through the fourth acquisition resistor Rc4, while the eighth acquisition optocoupler OC8 cannot acquire the half-wave current flowing through the fourth acquisition resistor Rc4. The current signals acquired by the seventh acquisition optocoupler OC7 and the eighth acquisition optocoupler OC8 are the indicator signals, enabling the control module 013 to perform position detection based on the current signals acquired by the seventh acquisition optocoupler OC7 and the eighth acquisition optocoupler OC8.

[0107] When acquiring the indication signal, if all components in the indication acquisition module are functioning correctly, the indication signals acquired by the first acquisition optocoupler OC1 and the fifth acquisition optocoupler OC5 will be the same; the indication signals acquired by the second acquisition optocoupler OC2 and the sixth acquisition optocoupler OC6 will be the same; the indication signals acquired by the third acquisition optocoupler OC3 and the seventh acquisition optocoupler OC7 will be the same; and the indication signals acquired by the fourth acquisition optocoupler OC4 and the eighth acquisition optocoupler OC8 will be the same. Therefore, mutual verification can be used to detect faults in the indication acquisition module and improve the accuracy of indication acquisition.

[0108] For example, Figure 15 , Figure 16 and Figure 17 This is another schematic diagram illustrating the operation of the data acquisition module provided in this embodiment of the invention, see reference. Figure 15 , Figure 16 and Figure 17 In any of the attached diagrams, the AC switch machine M is a four-wire AC switch machine MF. Then refer to... Figure 15 When all components in the acquisition module are functioning correctly, and the four-wire AC switch is in the left position (MF), the first acquisition optocoupler OC1 and the fifth acquisition optocoupler OC5 can acquire the same half-wave current, as can the fourth acquisition optocoupler OC4 and the eighth acquisition optocoupler OC8; however, the second acquisition optocoupler OC2 and the sixth acquisition optocoupler OC6, and the third acquisition optocoupler OC3 and the seventh acquisition optocoupler OC7, cannot acquire the half-wave current. (Reference) Figure 16When all components in the acquisition module are functioning correctly, and the four-wire AC switch machine MF is in the middle position, the first acquisition optocoupler OC1 and the fifth acquisition optocoupler OC5 can acquire the same half-wave current, and the third acquisition optocoupler OC3 and the seventh acquisition optocoupler OC7 can acquire the same half-wave current; the second acquisition optocoupler OC2 and the sixth acquisition optocoupler OC6, and the fourth acquisition optocoupler OC4 and the eighth acquisition optocoupler OC8 cannot acquire the half-wave current. (And reference...) Figure 17 When all components in the acquisition module are functioning correctly, and the four-wire AC switch MF is in the right position, the second acquisition optocoupler OC2 and the sixth acquisition optocoupler OC6 can acquire the same half-wave current, and the third acquisition optocoupler OC3 and the seventh acquisition optocoupler OC7 can acquire the same half-wave current; the first acquisition optocoupler OC1 and the fifth acquisition optocoupler OC5, and the fourth acquisition optocoupler OC4 and the eighth acquisition optocoupler OC8 cannot acquire the half-wave current.

[0109] For example, Figure 18 , Figure 19 and Figure 20 This is another schematic diagram illustrating the operation of the data acquisition module provided in this embodiment of the invention, see reference. Figure 18 , Figure 19 and Figure 20 In any of the attached diagrams, the AC switch machine M is a six-wire AC switch machine MS. Refer to [reference needed]. Figure 18 When all components in the acquisition module are functioning correctly, and the six-wire AC switch machine MS is in the right position, the first acquisition optocoupler OC1 and the fifth acquisition optocoupler OC5 can acquire the same half-wave current, and the fourth acquisition optocoupler OC4 and the eighth acquisition optocoupler OC8 can acquire the same half-wave current; the second acquisition optocoupler OC2 and the sixth acquisition optocoupler OC6, and the third acquisition optocoupler OC3 and the seventh acquisition optocoupler OC7 cannot acquire the half-wave current. (Reference) Figure 19 When all components in the acquisition module are functioning correctly, and the six-wire AC switch machine MS is in the middle position, the first acquisition optocoupler OC1 and the fifth acquisition optocoupler OC5 can acquire the same half-wave current, and the third acquisition optocoupler OC3 and the seventh acquisition optocoupler OC7 can acquire the same half-wave current; however, the second acquisition optocoupler OC2 and the sixth acquisition optocoupler OC6, and the fourth acquisition optocoupler OC4 and the eighth acquisition optocoupler OC8 cannot acquire the half-wave current. (Reference) Figure 20 When all components in the acquisition module are functioning correctly, and the six-wire AC switch MS is in the left position, the second acquisition optocoupler OC2 and the sixth acquisition optocoupler OC can acquire the same half-wave current, and the third acquisition optocoupler OC3 and the seventh acquisition optocoupler OC7 can acquire the same half-wave current; the first acquisition optocoupler OC1 and the fifth acquisition optocoupler OC5, and the fourth acquisition optocoupler OC4 and the eighth acquisition optocoupler OC8 cannot acquire the half-wave current.

[0110] In summary, the representation acquisition module provided in this embodiment of the invention can realize representation acquisition and position detection for four-wire AC switch machine MF and six-wire AC switch machine MS.

[0111] For example, refer to Figures 4 to 11 , Figure 13 , Figures 15-20 In any of the accompanying drawings, the first acquisition module 011 and the second acquisition module 012 both include a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4. The first resistor R1 is electrically connected between the first end of the first secondary winding T21 and the first node a; the second resistor R2 is electrically connected between the second end of the first secondary winding T21 and the first current detection unit 20; the third resistor R3 is electrically connected between the first end of the second secondary winding T22 and the third node c; and the fourth resistor R4 is electrically connected between the second end of the second secondary winding T22 and the second current detection unit 40. The first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 are used for current limiting to protect the circuit.

[0112] For example, refer to Figure 11 , Figure 13 , Figures 15-20 In any of the accompanying drawings, the first acquisition module 011 and the second acquisition module 012 both include a fifth resistor R5 and a sixth resistor R6. The fifth resistor R5 is electrically connected between the first node a and the first self-test switch K3, and the sixth resistor R6 is electrically connected between the third node c and the second self-test switch K4. The fifth resistor R5 and the sixth resistor R6 are used for current limiting to protect the circuit.

[0113] Optional, Figure 21 This is a schematic diagram of a control system for the display and acquisition circuit of an AC switch machine provided in another embodiment of the present invention, as shown below. Figure 21 As shown, the control module 013 includes a first controller U1 and a second controller U2; the first controller U1 and the second controller U2 are communicatively connected, and both the first controller U1 and the second controller U2 are communicatively connected to the host computer.

[0114] Specifically, the first controller U1 can control the indicator relay 10, the first protection switch K1, the second protection switch K2, the first self-test switch K3, and the second self-test switch K4 in the first indicator acquisition module 011 and the second indicator acquisition module 012, and acquire the indicator signals of each current acquisition unit (first current acquisition unit 20, second current acquisition unit 30, third current acquisition unit 80, and fourth current acquisition unit 90) in the first indicator acquisition module 011 and the second indicator acquisition module 012. Similarly, the second controller U2 can control the indicator relay 10, the first protection switch K1, the second protection switch K2, the first self-test switch K3, and the second self-test switch K4 in the first indicator acquisition module 011 and the second indicator acquisition module 012, and acquire the indicator signals of each current acquisition unit (first current acquisition unit 20, second current acquisition unit 30, third current acquisition unit 80, and fourth current acquisition unit 90) in the first indicator acquisition module 011 and the second indicator acquisition module 012. Furthermore, the first controller U1 and the second controller U2 can communicate in real time. This allows them to determine if the position of the AC switch machine M differs based on the acquired indicator signals, indicating a position detection error that can be manually verified. Additionally, if either the first controller U1 or the second controller U2 determines a circuit fault in the indicator acquisition module, the acquisition of indicator signals can be stopped to avoid position detection errors in the AC switch machine M. Moreover, both the first controller U1 and the second controller U2 can communicate with a host computer, for example, via RS485 or Ethernet, enabling real-time transmission of indicator signals, position detection results, and self-test results from the indicator acquisition module.

[0115] Optional, Figure 22 This is a schematic diagram of the structure of a display and acquisition circuit for another AC switch machine provided in an embodiment of the present invention, as shown below. Figure 22 As shown, the acquisition circuit 01 further includes: a first drive module 014 and a second drive module 015; both the first drive module 014 and the second drive module 015 are electrically connected to the control module 013 and the AC switch machine M; the control module 013 is also used to control the first drive module 014 to drive the AC switch machine M according to the turnout signal, and / or to control the second drive module 015 to drive the AC switch machine M according to the turnout signal.

[0116] Specifically, after verifying the current position of the AC switch machine M, the control module 013 can drive the AC switch machine M to operate via at least one of the first drive module 014 and the second drive module 015 according to the turnout signal, in order to perform turnout operation. The turnout signal can be a user operation signal, such as a left-hand operation signal and a right-hand operation signal. When the turnout signal is a left-hand operation signal, the control module 013 controls the AC switch machine M to rotate to the left position; when the turnout signal is a right-hand operation signal, the control module 013 controls the AC switch machine M to rotate to the right position. Different AC switch machines M can be driven by the first drive module 014 and the second drive module 015 respectively. For example, the first drive module 014 drives the first AC switch machine M1, and the second drive module 015 drives the second AC switch machine M2, to meet the field requirements of multiple AC switch machines.

[0117] Based on the same inventive concept, embodiments of the present invention also provide a control device for an AC switch machine. Figure 23 This is a schematic diagram of the structure of a control device for an AC switch machine provided in an embodiment of the present invention, as shown below. Figure 23 As shown, the control device for an AC switch machine includes at least two display acquisition circuits 01 for an AC switch machine provided in any embodiment of the present invention. Therefore, the control device for an AC switch machine provided in the embodiments of the present invention includes the technical features of the display acquisition circuits for an AC switch machine provided in any embodiment of the present invention, and can achieve the beneficial effects of the display acquisition circuits for an AC switch machine provided in any embodiment of the present invention. Similarities can be referred to the above description of the display acquisition circuits for an AC switch machine provided in the embodiments of the present invention, and will not be repeated here.

[0118] The diagram illustrates a control device for an AC switch machine that includes two indication acquisition circuits 01. These two circuits 01 can be a first indication acquisition circuit 01a and a second indication acquisition circuit 01b. One of these circuits can be the primary indication acquisition circuit, and the other can be a backup circuit. During indication acquisition, the primary circuit acquires the indication signal of the AC switch machine M. If the primary circuit fails, the backup circuit acquires the indication signal. The control module 013 in the first indication acquisition circuit 01a and the control module 013 in the second indication acquisition circuit 01b are communicatively connected to enable real-time communication of fault information.

[0119] In another feasible embodiment of the present invention, the control device 100 of the AC switch machine may further include a turnout base plate 02, a four-wire AC turnout terminal plate 03, and a six-wire AC turnout terminal plate 04 to realize the connection between the control device and the AC switch machine M. The turnout base plate 02 may include connection terminals corresponding to each indicator switch and connection terminals corresponding to the first indicator acquisition module 011, the second indicator acquisition module 012, the first drive control module 014, and the second drive control module 015; each connection terminal is electrically connected to the four-wire AC switch machine through the four-wire AC turnout terminal plate 03; or, each connection terminal is electrically connected to the six-wire AC switch machine through the six-wire AC turnout terminal plate 04.

[0120] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A display and acquisition circuit for an AC switch machine, characterized in that, include: The first represents the acquisition module, and the second represents the acquisition module and the control module; Both the first and second representation acquisition modules include: a transformer, a representation relay, a first current acquisition unit, a second current acquisition unit, a first unidirectional transmission circuit, a second unidirectional transmission circuit, a third unidirectional transmission circuit, and a fourth unidirectional transmission circuit; The transformer includes a primary winding, a first secondary winding, and a second secondary winding; the indicator relay includes a first indicator switch, a second indicator switch, a third indicator switch, and a fourth indicator switch; The first end of the first secondary winding is electrically connected to the input end of the first unidirectional transmission circuit and the output end of the second unidirectional transmission circuit at the first node. The output ends of the first unidirectional transmission circuit and the third unidirectional transmission circuit are both electrically connected to the first end of the first indicator switch. The first end of the first current acquisition unit is electrically connected to the second end of the first secondary winding, and the second end of the first current acquisition unit is electrically connected to the first end of the second indicator switch at the second node. The first end of the second secondary winding is electrically connected to the input end of the third unidirectional transmission circuit and the output end of the fourth unidirectional transmission circuit at the third node. The input end of the fourth unidirectional transmission circuit and the input end of the second unidirectional transmission circuit are electrically connected to the first end of the third indicator switch. The first end of the second current acquisition unit is electrically connected to the second end of the second secondary winding, and the second end of the second current acquisition unit is electrically connected to the first end of the fourth indicator switch at the fourth node; The second terminals of the first indicator switch, the second indicator switch, the third indicator switch, and the fourth indicator switch are all electrically connected to the AC switch motor. The coil representing the relay is electrically connected to the control module, and both the first current acquisition unit and the second current acquisition unit are electrically connected to the control module; The control module is used to output a first control signal to the coil of the indicator relay, and to acquire the indicator signals provided by the first current acquisition unit and the second current acquisition unit, and to detect the position of the AC switch machine according to the indicator signals; The control module is electrically connected to the first representation acquisition module and the second representation acquisition module respectively, so as to perform representation acquisition on the two AC switch machines through the first representation acquisition module and the second representation acquisition module respectively; Both the first and second representation acquisition modules further include: a first self-test switch and a second self-test switch; the first self-test switch is electrically connected between the first node and the second node; the second self-test switch is electrically connected between the third node and the fourth node; both the first and second self-test switches are also electrically connected to the control module. The control module is also used to output a third control signal to the first self-test switch and the second self-test switch to control the first self-test switch and the second self-test switch to be turned on or off.

2. The display and acquisition circuit of the AC switch machine according to claim 1, characterized in that, Both the first and second representation acquisition modules further include: a third current acquisition unit and a fourth current acquisition unit; The third current acquisition unit is electrically connected between the second node and the first terminal of the second indicator switch; The fourth current acquisition unit is electrically connected between the fourth node and the first terminal of the fourth indicator switch; Both the third current acquisition unit and the fourth current acquisition unit are electrically connected to the control module.

3. The display and acquisition circuit of the AC switch machine according to claim 1, characterized in that, Both the first and second representation acquisition modules further include: a first protection switch and a second protection switch; The first protection switch is electrically connected between the second end of the first secondary winding and the first end of the first current acquisition unit; The second protection switch is electrically connected between the second end of the second secondary winding and the first end of the second current acquisition unit; Both the first protection switch and the second protection switch are electrically connected to the control module; The control module is also used to output a second control signal to the first protection switch and the second protection switch to control the first protection switch and the second protection switch to be turned on or off.

4. The display and acquisition circuit of the AC switch machine according to claim 1, characterized in that, The first current acquisition unit includes a first acquisition optocoupler, a second acquisition optocoupler, and a first acquisition resistor; The first acquisition resistor is electrically connected between the second end of the first secondary winding and the second node; the input end of the first acquisition optocoupler is electrically connected to the second node, and the output end of the first acquisition optocoupler is electrically connected to the second end of the first secondary winding. The input terminal of the second acquisition optocoupler is electrically connected to the second terminal of the first secondary winding, and the output terminal of the second acquisition optocoupler is electrically connected to the second node; The second current acquisition unit includes a third acquisition optocoupler, a fourth acquisition optocoupler, and a second acquisition resistor; The second acquisition resistor is electrically connected between the second end of the second secondary winding and the fourth node; the input end of the third acquisition optocoupler is electrically connected to the fourth node, and the output end of the third acquisition optocoupler is electrically connected to the second end of the second secondary winding; the input end of the fourth acquisition optocoupler is electrically connected to the second end of the second secondary winding, and the output end of the fourth acquisition optocoupler is electrically connected to the fourth node. The first acquisition optical coupler, the second acquisition optical coupler, the third acquisition optical coupler, and the fourth acquisition optical coupler are all electrically connected to the control module.

5. The display and acquisition circuit of the AC switch machine according to claim 2, characterized in that, The third current acquisition unit includes: a fifth acquisition optocoupler, a sixth acquisition optocoupler, and a third acquisition resistor; The third acquisition resistor is electrically connected between the second node and the first terminal of the second indicator switch; the input terminal of the fifth acquisition optocoupler is electrically connected to the first terminal of the second indicator switch, and the output terminal of the fifth acquisition optocoupler is electrically connected to the second node; the input terminal of the sixth acquisition optocoupler is electrically connected to the second node, and the output terminal of the sixth acquisition optocoupler is electrically connected to the first terminal of the second indicator switch. The fourth current acquisition unit includes: a seventh acquisition optocoupler, an eighth acquisition optocoupler, and a fourth acquisition resistor; the fourth acquisition resistor is electrically connected between the fourth node and the first terminal of the fourth indicator switch; the input terminal of the seventh acquisition optocoupler is electrically connected to the first terminal of the fourth indicator switch, and the output terminal of the seventh acquisition optocoupler is electrically connected to the fourth node; the input terminal of the eighth acquisition optocoupler is electrically connected to the fourth node, and the output terminal of the eighth acquisition optocoupler is electrically connected to the first terminal of the fourth indicator switch. The fifth, sixth, seventh, and eighth optical acquisition couplers are all electrically connected to the control module.

6. The display and acquisition circuit of the AC switch machine according to claim 1, characterized in that, The relay further includes: at least one detection switch; The first end of the detection switch is electrically connected to the control module, and the second end of the detection switch receives a fixed voltage signal.

7. The display and acquisition circuit of the AC switch machine according to claim 1, characterized in that, The control module includes a first controller and a second controller; The first controller is communicatively connected to the second controller, and both the first controller and the second controller are communicatively connected to the host computer.

8. The display and acquisition circuit of the AC switch machine according to claim 1, characterized in that, Also includes: First drive module and second drive module; Both the first drive module and the second drive module are electrically connected to the control module and the AC switch electromechanical system; The control module is also configured to control the first drive module to drive the AC switch machine according to the turnout signal, and / or to control the second drive module to drive the AC switch machine according to the turnout signal.

9. A control device for an AC switch machine, characterized in that, It includes at least two representation and acquisition circuits for AC switch machines as described in any one of claims 1 to 8.

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