CN114013473B - Switch control position indicating circuit, device and detection method - Google Patents
Switch control position indicating circuit, device and detection method Download PDFInfo
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- CN114013473B CN114013473B CN202111202359.3A CN202111202359A CN114013473B CN 114013473 B CN114013473 B CN 114013473B CN 202111202359 A CN202111202359 A CN 202111202359A CN 114013473 B CN114013473 B CN 114013473B
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- 238000001514 detection method Methods 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 12
- 230000005484 gravity Effects 0.000 description 7
- 238000002955 isolation Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 230000007717 exclusion Effects 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
- B61L5/10—Locking mechanisms for points; Means for indicating the setting of points
- B61L5/107—Locking mechanisms for points; Means for indicating the setting of points electrical control of points position
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Abstract
The embodiment of the application discloses a switch control position representation circuit, a device and a detection method, wherein the circuit comprises: a switch K3-1 connected with the 3 rd pin representing the secondary side of the transformer; the auxiliary acquisition circuit is connected with the switch K3-1 at one end and connected with one end of the switch K2-1 at the other end, and comprises two branches connected in parallel, wherein each branch is provided with a first acquisition unit and a first conduction unit, and the conduction directions of the first conduction units on the two branches are opposite; one end of the switch K3-2 is connected with the other end of the switch K2-1, and the other end of the switch K is connected with the switch machine; the main acquisition circuit comprises a second acquisition unit and a second conduction unit, wherein the conduction direction of the second conduction unit is determined according to the binding post of the connected switch machine; and one end of the switch K2-2 is connected with the 4 th pin representing the secondary side of the transformer, and the other end of the switch K is connected with the switch machine.
Description
Technical Field
The embodiment of the application relates to the field of information processing, in particular to a switch control position representation circuit, a switch control position representation device and a switch control detection method.
Background
The switch control of the computer interlocking system adopts 6502 electric centralized circuit, external equipment thereof, the action of the external equipment is controlled by controlling the gravity type safety relay coil to suck or drop, and the position state information of the real switch machine is obtained by the same state of the indicating relay contact.
Conventional computer interlock systems, whether performing switch operations or obtaining switch machine position status information, require actuation and acquisition of corresponding gravity relays. When the gravity relay is used as a medium for control, the gravity relay is large in volume, occupied area and wiring workload, so that maintenance is difficult.
Disclosure of Invention
In order to solve any technical problem, an embodiment of the present application provides a switch control position indication circuit, a switch control position indication device and a switch control detection method.
To achieve the object of the embodiments of the present application, the embodiments of the present application provide a switch control position indication circuit, including:
a switch K3-1 connected with the 3 rd pin representing the secondary side of the transformer;
the auxiliary acquisition circuit is connected with the switch K3-1 at one end and connected with one end of the switch K2-1 at the other end, and comprises two branches connected in parallel, wherein each branch is provided with a first acquisition unit and a first conduction unit, and the conduction directions of the first conduction units on the two branches are opposite;
one end of the switch K3-2 is connected with the other end of the switch K2-1, and the other end of the switch K is connected with the switch machine;
one end of the main acquisition circuit is connected with the other end of the auxiliary acquisition circuit, and the other end of the main acquisition circuit is connected with the switch machine, and the main acquisition circuit comprises a second acquisition unit and a second conduction unit, wherein the conduction direction of the second conduction unit is determined according to a binding post of the connected switch machine;
one end of the switch K2-2 is connected with the 4 th pin representing the secondary side of the transformer, and the other end of the switch K2-2 is connected with the switch machine;
wherein, the switches K2-1, K2-2, K3-1 and K3-2 are provided with normally open contacts and normally closed contacts.
A switch controlled position indication device comprising:
representing a transformer;
the positions described above represent circuits C1, C2, in which:
the main acquisition circuit, the switch K3-2 and the switch K2-2 of the position representation circuit C1 are sequentially connected with binding posts X4, X2 and X1 of the switch machine; the conducting direction of the second conducting unit is from the binding post X4 to the auxiliary acquisition circuit;
the main acquisition circuit, the switch K3-2 and the switch K2-2 of the position representation circuit C2 are sequentially connected with binding posts X5, X3 and X1 of the switch machine; the conducting direction of the second conducting unit is from the auxiliary acquisition circuit to the binding post X5.
A method of detection using the apparatus described above, comprising:
the power-on states of the switches K2-1, K2-2, K3-1 and K3-2 are controlled to enable the switch machine to be in a positioning or reverse state;
acquiring acquisition results of the first acquisition unit and the second acquisition unit;
and determining the position representation state of the switch machine according to the acquisition result.
One of the above technical solutions has the following advantages or beneficial effects:
two acquisition circuits are arranged to acquire 3 signals respectively for determining the position representation state, and the corresponding conduction units are arranged to acquire signals connected to the circuits of the binding posts of the switch machine so as to more accurately position the position representation state.
Additional features and advantages of embodiments of the application will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of embodiments of the application. The objectives and other advantages of the embodiments of the present application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the technical solutions of the embodiments of the present application, and are incorporated in and constitute a part of this specification, illustrate the technical solutions of the embodiments of the present application and not constitute a limitation to the technical solutions of the embodiments of the present application.
Fig. 1 is a schematic diagram of an ac switch machine driving system according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a switch control position indication circuit according to an embodiment of the present application;
FIG. 3 is a flow chart of a method for detection using the above apparatus according to an embodiment of the present application;
FIG. 4 (a) is a schematic diagram of a positioning representation acquisition circuit according to an embodiment of the present application;
FIG. 4 (b) is a schematic diagram of the acquisition result of the circuit of FIG. 4 (a);
FIG. 5 (a) is a schematic diagram of a flip-bit representation acquisition circuit according to an embodiment of the present application;
fig. 5 (b) is a schematic diagram of the acquisition result of the circuit shown in fig. 5 (a).
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the embodiments of the present application will be described in detail hereinafter with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be arbitrarily combined with each other.
Fig. 1 is a schematic diagram of an ac switch machine driving system according to an embodiment of the present application. As shown in fig. 1, the system is mainly composed of 3 switch units and sensors; wherein:
the first switch unit is used as a power switch to realize the connection and disconnection of an alternating current 380VAC power supply;
the second switch unit is used for realizing logic control of the operation of the switch machine and is used for controlling and executing a representation function or a positioning function;
the third switch unit is used for determining the alternating current power supply time sequence of the switch machine so as to determine whether the switch machine is in a positioning operation or a reverse operation;
the sensor is used for collecting three-phase current values of the switch machine.
In the embodiment of the application, the second switch unit comprises a switch K2-1 and a switch K2-2; the third switching unit includes a switch K3-1 and a switch K3-2.
Fig. 2 is a schematic diagram of a position indication circuit for switch control according to an embodiment of the present application. As shown in fig. 2, includes:
a switch K3-1 connected with the 3 rd pin representing the secondary side of the transformer;
the auxiliary acquisition circuit is connected with the switch K3-1 at one end and connected with one end of the switch K2-1 at the other end, and comprises two branches connected in parallel, wherein each branch is provided with a first acquisition unit and a first conduction unit, and the conduction directions of the first conduction units on the two branches are opposite;
one end of the switch K3-2 is connected with the other end of the switch K2-1, and the other end of the switch K is connected with the switch machine;
the main acquisition circuit is connected with the other end of the indicating diode, and the other end of the main acquisition circuit is connected with the switch machine and comprises a second acquisition unit and a second conduction unit, wherein the conduction direction of the second conduction unit is determined according to a binding post of the connected switch machine;
one end of the switch K2-2 is connected with the 4 th pin representing the secondary side of the transformer, and the other end of the switch K2-2 is connected with the switch machine;
wherein, the switches K2-1, K2-2, K3-1 and K3-2 are provided with normally open contacts and normally closed contacts.
The device that this application embodiment provided is provided with two acquisition circuit, realizes the collection to 3 signals to be used for confirming the position and represent the state, and through setting up corresponding switching on unit, realizes the signal acquisition of connecting on the circuit of the terminal of switch machine, so that more accurate position represents the state.
Optionally, the circuit further comprises:
one end of the resistor R1 is connected with the switch K3-1, and the other end of the resistor R is connected with the auxiliary acquisition circuit.
The resistor R1 is used for controlling the current of the main circuit in the circuit, so that the current in the circuit is ensured to be in a reasonable range, and circuit faults caused by overlarge current in the auxiliary acquisition circuit are avoided.
In an exemplary embodiment, the circuit further comprises:
and one end of the resistor R2 is connected with one end of the main acquisition circuit, and the other end of the resistor R2 is connected with the other end of the main acquisition circuit.
The resistor R2 is utilized to shunt the current of the main circuit, so that the current in the circuit is ensured to be within a reasonable range, the current flowing through the main acquisition circuit is reduced, and circuit faults caused by overlarge current in the main acquisition circuit are avoided.
In an exemplary embodiment, the circuit further comprises:
and one end of the third conduction unit is connected with the other end of the auxiliary acquisition circuit, the other end of the third conduction unit is connected with one end of the main acquisition circuit, and the conduction direction is the same as that of the second conduction unit.
The third conducting unit may be a rectifier diode.
After the resistor R2 is arranged, the current direction is limited by the third conduction unit, so that circuit faults caused by direct conduction of current through the resistor R2 are avoided.
The embodiment of the application provides a position indicating device of switch control, includes:
representing a transformer;
the positions described above represent circuits C1, C2, in which:
the main acquisition circuit, the switch K3-2 and the switch K2-2 of the position representation circuit C1 are sequentially connected with binding posts X4, X2 and X1 of the switch machine; the second conduction unit is guided from the binding post X4 to the auxiliary acquisition circuit;
the main acquisition circuit, the switch K3-2 and the switch K2-2 of the position representation circuit C2 are sequentially connected with binding posts X5, X3 and X1 of the switch machine; the second conduction unit is guided from the auxiliary acquisition circuit to the binding post X5.
If the third conducting unit is a rectifier diode, in the position indicating circuit C1, the conducting direction of the rectifier diode is that the anode is connected with the second conducting unit, and in the position indicating circuit C2, the conducting direction of the rectifier diode is that the cathode is connected with the second conducting unit.
The position indicating circuit consists of a positioning indicating circuit and an inversion indicating circuit, wherein the functions and the structures of the positioning indicating circuit and the inversion indicating circuit are the same, and the external switch machines are in charge of different wiring positions.
The positioning and inversion indicating circuits form a loop through the secondary side of the indicating transformer and the binding post of the switch machine and the joint combination circuit of the switch machine locking device.
The main acquisition circuit consists of a representation transformer, a current limiting resistor, a threshold resistor, a rectifier diode, an acquisition circuit, a normally-closed contact group of the first switch unit and a normally-open and normally-closed contact group of the second switch unit. For the acquisition of the primary representation position and the secondary reverse position representation state. The acquisition circuit is used for acquiring the photoelectric isolation switch value. But is not limited to, the photo-isolation switch amount can also be an analog acquisition amount.
Auxiliary acquisition circuit: the device consists of a representation transformer, a current limiting circuit, a threshold circuit, a rectifier diode, an acquisition circuit, a normally-closed contact group of a first switch unit and normally-open and normally-closed contact groups of a second switch unit. For assisting in the acquisition of a state representing a position. The acquisition circuit is used for acquiring the photoelectric isolation switch value. But is not limited to, the photo-isolation switch amount can also be an analog acquisition amount.
Wherein, the switch machine lock ware node combination circuit of peripheral load: the device mainly comprises a locking device switch contact group in an alternating current switch machine, and is connected with different locking device switch contacts for a positioning indicating circuit and a reversing indicating circuit. As a peripheral loop representing a circuit.
The current limiting circuit and the indicating diode are connected in series and are connected with the contact group of the switch machine locking device in a hanging mode, and the positioning indicating circuit and the inversion indicating circuit are connected with the current limiting resistor and the indicating diode through the locking device node combination of the switch machine.
Fig. 3 is a flowchart of a method for performing detection using the above apparatus according to an embodiment of the present application. As shown in fig. 3, the method includes:
step 301, controlling the power-on states of the switches K2-1, K2-2, K3-1 and K3-2 to enable the switch machine to be in a positioning or reverse state;
step 302, acquiring acquisition results of a first acquisition unit and a second acquisition unit;
and 303, determining the position representation state of the switch machine according to the acquisition result.
In an exemplary embodiment, if the signals in the same period are pulse signals, it is determined that the switch machine can correctly represent the position state.
The method provided by the embodiment of the application uses the principle of the electronic acquisition circuit and the node state of the inner locker of the switch machine to construct a dynamic state acquisition loop. The acquisition loop is divided into a main representation loop and an auxiliary representation loop. The main representation parameters, the auxiliary representation parameters and the auxiliary reverse representation parameters of the parameter atmosphere are collected, and the position states of the turnout are effectively collected through two loops and three dynamic parameters.
The following describes the schemes provided in the embodiments of the present application:
fig. 4 (a) is a schematic diagram of a positioning representation acquisition circuit according to an embodiment of the present application. As shown in fig. 4 (a), the positioning representation acquisition circuit is explained:
the operating conditions of the execution positioning representation acquisition circuit are described:
the external switch machine needs to detect the real position state of the turnout as long as the external switch machine is in a non-operation state (the motor in the switch machine is not rotated). The first switching unit and the second switching unit in fig. 1 are in a power-off state. The normally open contact is opened, and the normally closed contact is closed. The working state of the third switch unit is controlled by the upper communication layer. When the third switch unit is in the power-off state, conditions are provided for performing the positioning operation and the positioning indication state of the switch.
If the positioning indicating circuit is in a correct indicating state to be acquired, the second group of switch units are in a power-off state, and normally-closed contacts of the second group of switch units in the loop are all attracted; the third group of switch units are in a power-off state, and normally-closed contacts of the third switch units in the loop are all attracted;
the switch machine is provided with 4 groups of locking devices, wherein the locking device 1 and the locking device 2 have mutual exclusion relation, the locking device 3 and the locking device 4 have mutual exclusion relation, the locking device 1 and the locking device 3 are in contact attraction, and peripheral conditions are provided for collecting the positioning indication state of the switch.
The working principle of the positioning representation acquisition circuit is described:
see fig. 4 (a) for a circuit loop marked by a dashed line formed by a transverse line. The primary side of the transformer is 50Hz alternating current 220V, the secondary side is alternating current 110VAC, and when the real signal value of the pin 3 is positive (alternating current positive half cycle), the auxiliary positioning indicates that the loop is conducted. The signal loop is used for representing the secondary side 3 pin of the transformer, the resistor R1, the normally closed contact of the switch K3-1, the auxiliary fixed acquisition unit, the normally closed contact of the switch K2-1, the normally closed contact of the switch K3-2, the X2 interface, the switch locking device group 3 (33/34 contact), the switch locking device group 1 (15/16 contact), the diode D0 and the resistor R0, the switch locking device group 3 (35/36 contact), the X1 interface, the normally closed contact of the switch 2-2 and the secondary side 4 pin of the transformer. In the loop, the auxiliary indication unit can upload the acquired switching value signal or analog value signal to the CPU of the turnout control module to carry out indication logic judgment.
See the circuit loop marked by the dotted line formed by the dots in fig. 4 (a). The primary side of the transformer is 50Hz alternating current 220V, the secondary side is alternating current 110VAC, and when the real-time value of the signal of the pin 3 is negative (alternating current positive half cycle), the main fixed acquisition unit and the auxiliary reverse fixed acquisition unit are conducted. The signal loop is used for representing the secondary side 4 pins of the transformer, the normally closed contact of the switch K2-2, the X1 interface, the switch locking device set 1 (11/12 contacts), the X4 interface, the main positioning acquisition, the current limiting resistor R2, the auxiliary reverse positioning acquisition and the secondary side 3 pins of the transformer. In the loop, the main positioning acquisition and the auxiliary reverse positioning representation acquisition can upload the acquired switching value signals or analog value signals to a CPU of the turnout control module for representation logic judgment.
Fig. 4 (b) is a schematic diagram of the acquisition result of the circuit shown in fig. 4 (a). As shown in fig. 4 (b), DB is a primary positioning indicating signal, aux_db is a secondary positioning indicating signal, and aux_f_db is a secondary reverse positioning indicating signal. The three signals are pulse signals in one period and represent that the turnout position is positioned.
Fig. 5 (a) is a schematic diagram of a flip-bit representation acquisition circuit according to an embodiment of the present application. As shown in fig. 5 (a), description will be given of a flip-bit representation acquisition circuit:
the working conditions of the flip-bit representation acquisition circuit are described:
the external switch machine needs to detect the real position state of the turnout as long as the external switch machine is in a non-operation state (the motor in the switch machine is not rotated). The first and second switch units in fig. 1 are in a power-off state. The normally open contact is opened, and the normally closed contact is closed. The working state of the third switch unit is controlled by the upper communication layer. When the switch 3 is in the powered state, conditions are provided for the flip operation and flip indication state of the switch.
If the inversion indicating circuit is in a correct indicating state to be acquired, the second switch unit is in a power-off state, and normally-closed contacts of the second switch unit in the loop are all attracted; the third switch unit is in a power-on state, and normally open contacts of the third switch unit in the loop are all attracted;
the switch machine is provided with 4 groups of locking devices, wherein the locking device 1 and the locking device 2 have mutual exclusion relation, the locking device 3 and the locking device 4 have mutual exclusion relation, the locking device 2 and the locking device 4 are in contact attraction, and external conditions are provided for collecting the inversion representation state of the switch.
The working principle of the inversion representation acquisition circuit is described as follows:
see fig. 5 (a) for a circuit loop marked by a dashed line formed by a transverse line. The primary side of the transformer is 50Hz alternating current 220V, the secondary side is alternating current 110VAC, and when the real signal value of the pin 3 is positive (alternating current positive half cycle), the main bit and the reverse bit indicate that the loop is conducted. The signal loop is used for representing the secondary side 3 pin of the transformer, the normally open contact of the switch 3-1, the auxiliary reverse inversion representation, the main inversion representation acquisition, the rectifier diode, the X5 interface, the switch machine locking device set 4 (41/42 contact), the X1 interface, the normally closed contact of the switch 2-2 and the secondary side 4 pin of the transformer. In the loop, the main inversion represents collection and the auxiliary inversion represents collection, and collected switching value signals or analog quantity signals can be uploaded to a CPU of the turnout control module for representation logic judgment.
See fig. 5 (a) for a circuit loop marked by a dotted line of dots. The primary side of the transformer is 50Hz alternating current 220V, the secondary side of the transformer is alternating current 110VAC, and when the real signal value of the pin 3 is negative (alternating current positive half cycle), the primary positioning indicates that the loop and the auxiliary reverse positioning indicates that the loop is conducted. The signal loop is used for representing the secondary side 4 pins of the transformer, the normally closed contact of the switch K2-2, the X1 interface, the switch locking device set 2 (25/26 contacts), the diode D0 and the resistor R0, the switch locking device set 4 (45/46 contacts), the switch locking device set 2 (23/24 contacts), the X3 interface, the normally open contact of the switch K3-2, the normally closed contact of the switch K2-1, the auxiliary inversion representing collection and the secondary side 3 pins of the transformer. In the loop, the auxiliary inversion representation acquisition can upload the acquired switching value signal or analog value signal to the CPU of the turnout control module for representation logic judgment.
Fig. 5 (b) is a schematic diagram of the acquisition result of the circuit shown in fig. 5 (a). As shown in fig. 5 (b), FB is a main positioning indicating signal, aux_fb is an auxiliary positioning indicating signal, and aux_f_fb is an auxiliary reverse positioning indicating signal in fig. 5. The three signals are pulse signals in one period and represent that the turnout position is in the inversion.
In the above scheme, the position acquisition can be the state acquisition of the switching value signals of photoelectric isolation, magnetoelectric isolation and Rong Ou isolation, or the signal acquisition of analog values of sampling resistors, sensors and the like.
Referring to table 1, the true values representing the states are provided:
TABLE 1
As can be seen from table 1, the 3 flag bits corresponding to the status bits are all pulses to ensure that the correct acquisition effectively represents the position status.
Compared with the technical scheme that the gravity relay is adopted to collect and represent the position state in the prior art, the scheme provided by the embodiment of the application has the following advantages that the gravity relay is adopted to collect and represent the position state, and the gravity relay comprises the following steps:
representing position acquisition electronics, integration, and miniaturization. Compared with the traditional mode, the invention adopts the representation loop built by the electronic components, has high integration and small volume, does not need redundant wiring, reduces field wiring, and has simple operation and convenient use.
The method adopts a dynamic pulse acquisition mode to obtain the representation position, and can ensure that the representation position is acquired by mistake due to equipment failure, abnormality or other reasons, thereby improving the quality of products.
The representation collection state of the representation position collection is collected through 6 different variables, comprehensive judgment is performed, collection accuracy is improved, and the protection effect on mixed wires and mixed joints of the outer cloth wiring is achieved. The quality and efficiency of the product are improved.
Those of ordinary skill in the art will appreciate that all or some of the steps, systems, functional modules/units in the apparatus, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between the functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed cooperatively by several physical components. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.
Claims (7)
1. A switch controlled position indication circuit, wherein the position indication circuit is a positioning indication acquisition circuit or a flip-bit indication acquisition circuit of a switch machine, the position indication circuit comprising:
a switch K3-1 connected with the 3 rd pin representing the secondary side of the transformer;
the auxiliary acquisition circuit is connected with the switch K3-1 at one end and connected with one end of the switch K2-1 at the other end, and comprises two branches connected in parallel, wherein each branch is provided with a first acquisition unit and a first conduction unit, and the conduction directions of the first conduction units on the two branches are opposite;
one end of the switch K3-2 is connected with the other end of the switch K2-1, and the other end of the switch K is connected with the switch machine;
one end of the main acquisition circuit is connected with the other end of the auxiliary acquisition circuit, and the other end of the main acquisition circuit is connected with the switch machine, and the main acquisition circuit comprises a second acquisition unit and a second conduction unit, wherein the conduction direction of the second conduction unit is determined according to a binding post of the connected switch machine;
one end of the switch K2-2 is connected with the 4 th pin representing the secondary side of the transformer, and the other end of the switch K2-2 is connected with the switch machine;
wherein, the switches K2-1, K2-2, K3-1 and K3-2 are provided with normally open contacts and normally closed contacts.
2. The circuit of claim 1, comprising:
one end of the resistor R1 is connected with the switch K3-1, and the other end of the resistor R is connected with the auxiliary acquisition circuit.
3. The circuit of claim 1, comprising:
and one end of the resistor R2 is connected with one end of the main acquisition circuit, and the other end of the resistor R2 is connected with the other end of the main acquisition circuit.
4. A circuit according to claim 3, comprising:
and one end of the third conduction unit is connected with the other end of the auxiliary acquisition circuit, the other end of the third conduction unit is connected with one end of the main acquisition circuit, and the conduction direction is the same as that of the second conduction unit.
5. A switch controlled position indication device comprising:
representing a transformer;
the position representation circuit C1, C2 of any one of claims 1 to 4, wherein:
the main acquisition circuit, the switch K3-2 and the switch K2-2 of the position representation circuit C1 are sequentially connected with binding posts X4, X2 and X1 of the switch machine; the conducting direction of the second conducting unit is from the binding post X4 to the auxiliary acquisition circuit;
the main acquisition circuit, the switch K3-2 and the switch K2-2 of the position representation circuit C2 are sequentially connected with binding posts X5, X3 and X1 of the switch machine; the conduction direction of the diode D1 is from the auxiliary acquisition circuit to the terminal X5.
6. A method of detection using the apparatus of claim 5, comprising:
the power-on states of the switches K2-1, K2-2, K3-1 and K3-2 are controlled to enable the switch machine to be in a positioning or reverse state;
acquiring acquisition results of the first acquisition unit and the second acquisition unit;
and determining the position representation state of the switch machine according to the acquisition result.
7. The method of claim 6, wherein said determining a position representation of the switch machine based on the acquisition comprises:
if the acquisition result is that the signals in the same period are pulse signals, the switch machine is determined to be capable of correctly representing the position state.
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