CN210793215U - Power supply control circuit and control device for turnout with same - Google Patents
Power supply control circuit and control device for turnout with same Download PDFInfo
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- CN210793215U CN210793215U CN201921452236.3U CN201921452236U CN210793215U CN 210793215 U CN210793215 U CN 210793215U CN 201921452236 U CN201921452236 U CN 201921452236U CN 210793215 U CN210793215 U CN 210793215U
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Abstract
The utility model discloses a power control circuit and the controlling means who is used for switch who has it, wherein, power control circuit includes: a switch unit; the protection unit is connected with the switch unit in series and connected between the first power supply and the interface circuit, wherein the interface circuit is connected with the turnout control equipment; the acquisition unit is connected with the switch unit and used for acquiring the state information of the switch unit; and the control unit is respectively connected with the switch unit, the protection unit and the acquisition unit and is used for controlling the switch-on or switch-off of the switch unit and controlling the switch-on or switch-off of the protection unit according to the state information. The power control circuit can realize the safe control of the interface circuit through the protection unit, thereby ensuring that the interface circuit outputs a correct and safe control command.
Description
Technical Field
The utility model relates to a rail transit technical field especially relates to a power control circuit and a controlling means for switch.
Background
In the current rail transit signal system, the control of the power supply of the single-rail turnout command interface is mostly realized through a relay, an optical coupler or a Metal-Oxide-Semiconductor (MOS) transistor, as shown in fig. 1 (taking a relay scheme as an example), and then a control command for turnout control equipment is output through a subsequent interface circuit. In the control mode, when a fault occurs, for example, the relay contact is adhered or the output end of the optical coupler/MOS tube fails to work to cause a short circuit, even if the fault is detected, the output of the power supply of the turnout command interface cannot be effectively disconnected, a control command with wrong turnout interface output is possibly caused, great hidden danger exists, and serious traffic accidents can be caused.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, an object of the present invention is to provide a power control circuit to realize the safety control of the interface circuit through the protection unit, thereby ensuring that the interface circuit outputs the correct and safe control command.
Another object of the present invention is to provide a control device for a switch.
To achieve the above object, the present invention provides, in a first aspect, a power control circuit, including: a switch unit; the protection unit is connected with the switch unit in series and connected between a first power supply and an interface circuit, wherein the interface circuit is connected with turnout control equipment; the acquisition unit is connected with the switch unit and used for acquiring the state information of the switch unit; the control unit is respectively connected with the switch unit, the protection unit and the acquisition unit and is used for controlling the on-off of the switch unit and controlling the on-off of the protection unit according to the state information.
According to the utility model discloses a power control circuit can realize the safety control to interface circuit through the protection unit to ensure that interface circuit exports correct, safe control command.
In addition, the power control circuit according to the above embodiment of the present invention may further have the following additional technical features:
in some examples, the switching unit includes: the safety relay comprises a first contact, a second contact, a third contact and a fourth contact, wherein the first contact is a normally open contact, the second contact is a normally closed contact, the fourth contact is a normally closed contact, the first contact is connected with a first pole of a first power supply, the second contact is connected with a second pole of the first power supply, and the control end of the first contact and the control end of the second contact are connected with the control unit.
In some examples, the protection unit includes: a first protection subunit connected with the first contact; a second protection subunit connected with the second contact; the control ends of the first protection subunit and the second protection subunit are connected with the control unit.
In some examples, the acquisition unit includes: the first acquisition subunit is used for acquiring the state information of the third contact and sending the state information of the third normally open contact to the control unit; the second acquisition subunit is used for acquiring the state information of the fourth contact and sending the state information of the fourth contact to the control unit; the third acquisition subunit is used for acquiring the state information of the third contact and sending the state information of the third normally open contact to the control unit; the fourth acquisition subunit is used for acquiring the state information of the fourth contact and sending the state information of the fourth contact to the control unit; the first acquisition subunit and the third acquisition subunit are arranged in an isolated mode, and the second acquisition subunit and the fourth acquisition subunit are arranged in an isolated mode.
In some examples, the control unit includes: the driving subunit is respectively connected with the first contact, the second contact, the first protection subunit and the control end of the second protection subunit; the first logic subunit and the second logic subunit are both connected with the driving subunit; a first control subunit and a second control subunit, wherein the first control subunit is respectively connected with the first acquisition subunit, the second acquisition subunit and the first logic subunit, the second control subunit is respectively connected with the third acquisition subunit, the fourth acquisition subunit and the second logic subunit, the first control subunit is configured to control the first contact point and the second contact point according to the state information of the third contact point and the fourth contact point, controlling the first contact to be closed or opened through the first logic subunit and the driving subunit, and controlling the first protection subunit to be closed or opened, the second control subunit being configured to control the second protection subunit to be closed or opened according to the state information of the third contact and the fourth contact, and controlling the second contact to be closed or opened and controlling the second protection subunit to be closed or opened through the second logic subunit and the driving subunit.
In some examples, the first contact, the second contact, the third contact, and the fourth contact act in unison.
In some examples, the first protection subunit and the second protection subunit both use a photoelectric coupler or a switching tube, and the driving subunit uses an and circuit.
In some examples, the first control subunit and the first logic subunit, and the second control subunit and the second logic subunit, each communicate over a FSMC bus.
In order to achieve the above object, a second aspect of the present invention provides a control device for a switch, including the power control circuit of the first aspect of the present invention.
The utility model discloses a controlling means for switch, through the utility model discloses a power control circuit can realize the safety control to interface circuit through the protection unit to ensure that interface circuit outputs correct, safe control command.
In addition, the control device for the turnout according to the above embodiment of the present invention may further have the following additional technical features:
in some examples, when the number of the power control circuits is 2, the control device for the turnout adopts a two-out-of-two structure.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic diagram of a power control circuit in the related art;
fig. 2 is a block diagram of a power control circuit according to an embodiment of the present invention;
fig. 3 is a block diagram of a protection unit according to an example of the present invention;
fig. 4 is a block diagram of an acquisition unit according to an example of the present invention;
fig. 5 is a schematic diagram of a power control circuit according to an example of the present invention;
fig. 6 is a schematic diagram of a power control circuit according to another example of the present invention;
fig. 7 is a schematic diagram of a power control circuit according to yet another example of the present invention;
fig. 8 is a control schematic of an and circuit according to an example of the present invention;
fig. 9 is a timing diagram of direct acquisition of safety relay contacts according to an example of the present invention;
fig. 10 is a timing diagram of a safety relay contact isolation acquisition according to an example of the present invention;
fig. 11 is a block diagram of a control device for a switch according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
The power supply control circuit and the control device for a switch having the same according to the embodiment of the present invention will be described below with reference to fig. 2 to 11.
Fig. 2 is a block diagram of a power control circuit according to an embodiment of the present invention.
As shown in fig. 2, the power control circuit 100 includes: a switch unit 10, a protection unit 20, an acquisition unit 30 and a control unit 40.
The protection unit 20 is connected in series with the switch unit 10 and is connected between the first power supply 1 and the interface circuit 2, wherein the interface circuit 1 is connected with the turnout control equipment 2; the acquisition unit 30 is connected with the switch unit 10 and used for acquiring the state information of the switch unit 10; the control unit 40 is respectively connected to the switch unit 10, the protection unit 20 and the acquisition unit 30, and the control unit 40 is configured to control the switch unit 10 to be turned on or off and the protection unit 20 to be turned on or off according to the state information.
Specifically, when the power control circuit 100 actually works, the interface circuit 2 may be controlled by the switch unit 10, so that the interface circuit 2 outputs a control command to the switch control device 3, and the switch control device 3 performs switch control according to the control command. In the control process of the switch unit 10, the protection unit 20 may maintain a conducting state, and the acquisition unit 30 may acquire state information of the switch unit 10 in real time and send the state information to the control unit 40, so that the control unit 40 controls the conduction or disconnection of the switch unit 10 and the protection unit 20 according to the state information, for example, when the switch unit 10 fails, the control unit 40 may control the protection unit 20 to disconnect, so that the failed switch unit 10 is disconnected from the interface circuit 2 connected to the switch control device 3, so as to prevent the failed switch unit 10 from controlling the interface circuit 2, and further prevent the switch control device 3 from performing switch control according to an erroneous control command.
That is, the power control circuit 100 in this embodiment, when a failure occurs in the switching unit 10 and the failure is detected, cuts off the path between the switching unit 10 and the interface circuit 2 by controlling the protection unit 20 to be turned off, compared to the related art in which the failure of the switching unit 10 is detected but the path cannot be cut off effectively, this embodiment can cut off the path effectively, and the control safety is higher and more timely.
Therefore, the embodiment can realize the safety control of the interface circuit through the protection unit, thereby ensuring that the interface circuit outputs a correct and safe control command.
In one example of the present invention, as shown in fig. 5, the switch unit 10 may include a safety relay KM. The safety relay comprises a first contact KM1, a second contact KM2, a third contact KM3 and a fourth contact KM4, wherein the first contact KM1, the second contact KM2 and the third contact KM3 are normally open contacts, the fourth contact KM4 is a normally closed contact, the first contact KM1 is connected with a first pole of a first power supply 1, the second contact KM2 is connected with a second pole of the first power supply 1, and control ends of the first contact KM1 and the second contact KM2 are both connected with the control unit 40. Alternatively, the first pole of the first power source 1 may be a positive pole, and the second pole of the first power source 1 may be a negative pole.
Wherein, the first contact KM1, the second contact KM2, the third contact KM3 and the fourth contact KM4 are linked to act. Alternatively, the model of the safety relay KM may be OA 5621.
Further, as shown in fig. 3, the protection unit 20 may include: a first protection subunit 21 and a second protection subunit 22. Referring to fig. 5, the first protection subunit 21 is connected to a first contact KM 1; second protection subunit 22 is connected to second contact KM 2; the control terminals of the first and second protection subunits 21, 22 are both connected to the control unit 40.
Further, as shown in fig. 4, the collecting unit 30 may include: a first acquisition subunit 31, a second acquisition subunit 32, a third acquisition subunit 33 and a fourth acquisition subunit 34. Referring to fig. 5, the first collecting subunit 31 is configured to collect the state information of the third contact KM3, and send the state information of the third contact KM3 to the control unit 40; the second collecting subunit 32 is configured to collect the state information of the fourth contact KM4, and send the state information of the fourth contact KM4 to the control unit 40; the third collecting subunit 33 is configured to collect the state information of the third contact KM3, and send the state information of the third contact KM3 to the control unit 40; the fourth collecting subunit 34 is configured to collect the state information of the fourth contact KM4, and send the state information of the fourth contact KM4 to the control unit 40; the first collecting subunit 31 and the third collecting subunit 33 are arranged in an isolated manner, so that the collection of the first collecting subunit 31 and the collection of the third collecting subunit 33 are not influenced by each other, and the second collecting subunit 32 and the fourth collecting subunit 34 are arranged in an isolated manner, so that the collection of the second collecting subunit 32 and the collection of the fourth collecting subunit 34 are not influenced by each other.
Specifically, as a specific embodiment in this example is described below with reference to fig. 5, when the safety relay KM is in operation, the first power source 1 supplies power to the safety relay KM, and the first acquisition subunit 31 and the second acquisition unit 32 may respectively and directly acquire state information of the third contact KM3 and the fourth contact KM4 in real time and respectively send the state information of the third contact KM3 and the fourth contact KM4 to the control unit 40, so that the control unit 40 may determine whether the third contact KM3 and the fourth contact KM4 are faulty or not according to the state information of the third contact KM3 and the fourth contact KM4, that is, whether the safety relay KM is faulty or not, and if the third contact KM3 and the fourth contact KM4 are not faulty, control the first protection subunit 21 and the second protection subunit 22 to be turned on so that the safety relay KM normally operates; in case of a fault, the first and second protection subunits 21, 22 are controlled to open to cut off the path between the safety relay KM and the interface circuit 2.
It will be appreciated that the safety relay KM is controlled from the interface circuit 2 via two paths, wherein the first path via the first protection subunit 21 provides a connection between the first contact KM1 and the interface circuit 2 and the second path via the second protection subunit 22 provides a connection between the second contact KM2 and the interface circuit 2. When any one of the third contact point KM3 and the fourth contact point KM4 fails, the safety relay KM is abnormally operated, i.e., fails.
For example, in practical application, under normal conditions, when a certain current flows through a coil of the safety relay KM, the normally open contacts of the safety relay KM, that is, the first contact KM1, the second contact KM2, and the third contact KM3, are closed, and the normally closed contact, that is, the fourth contact KM4, is opened, if the state information of the third contact KM3, which is sent by the first acquisition subunit 31 and received by the control unit 40, is open and/or the state information of the fourth contact KM, which is sent by the second acquisition unit 32, is closed, the control unit 40 determines that the safety relay KM has a fault, and then controls the first protection subunit 21 and the second protection subunit 22 to be opened in time, so as to cut off the first path and the second path, and avoid the interface circuit 2 from outputting a wrong control command.
In this example, when the state information of the third contact KM3 and the fourth contact KM4 is directly collected by the first collection subunit 31 and the second collection unit 32 as described above, the state information of the third contact KM3 and the fourth contact KM4 may also be collected by the third collection unit 33 and the fourth collection unit 34, respectively, and if the state information collected by the first collection subunit 31 and the third collection unit 33 is the same and the state information collected by the second collection unit 32 and the fourth collection unit 34 is the same, it is indicated that the safety relay KM is normal; on the contrary, if the state information collected by the first collecting subunit 31 and the third collecting subunit 33 is different, and/or the state information collected by the second collecting unit 32 and the fourth collecting unit 34 is different, it indicates that the safety relay KM has a fault, and at this time, the control unit 40 may timely control the first protecting unit 21 and the second protecting unit 22 to be disconnected, so as to cut off the first path and the second path.
Therefore, when a fault occurs, the first protection subunit and the second protection subunit can prevent the interface circuit from outputting wrong control commands, and the control safety is greatly enhanced.
In an example of the present invention, as shown in fig. 6, the control unit 40 may include: a drive subunit 41, a first logic subunit 42, a second logic subunit 43, a first control subunit 44 and a second control subunit 45.
Referring to fig. 6, the driving subunit 41 is connected to the control terminals of the first contact KM1, the second contact KM2, the first protection subunit 21, and the second protection subunit 22, respectively; the first logic subunit 42 and the second logic subunit 43 are both connected to the driving subunit 41; the first control subunit 44 is connected to the first acquisition subunit 31, the second acquisition subunit 32 and the first logic subunit 42, respectively, the second control subunit 45 is connected to the third acquisition subunit 33, the fourth acquisition subunit 34 and the second logic subunit 43, respectively, the first control subunit 44 is configured to control the first contact KM1 to be closed or opened and the first protection subunit 21 to be closed or opened through the first logic subunit 42 and the driving subunit 41 according to the state information of the third contact KM3 and the fourth contact KM4, and the second control subunit 45 is configured to control the second contact KM2 to be closed or opened and the second protection subunit 22 to be closed or opened through the second logic subunit 43 and the driving subunit 41 according to the state information of the third contact KM3 and the fourth contact KM 4.
In this example, referring to fig. 6, the first control subunit 44 and the first logic subunit 42, and the second control subunit 45 and the second logic subunit 43, may both communicate over the FSMC bus.
Specifically, with reference to fig. 6, when the safety relay KM is operated, the first contact KM1, the second contact KM2 and the third contact KM3 are closed, and the normally closed contact, that is, the fourth contact KM4 is opened, the first acquisition unit 21 and the second acquisition unit 22 respectively send the state information of the third contact KM3 and the fourth contact KM4 acquired in real time to the first control subunit 44, the first control subunit 44 sends the two pieces of state information to the first logic subunit 42, the first logic subunit 42 outputs the two pieces of state information to the driving subunit 41 after performing logic processing on the two pieces of state information, so that the driving subunit 41 controls the first contact KM1 to be closed or opened and controls the first protection unit 21 to be closed or opened, and simultaneously, the third acquisition unit 33 and the fourth acquisition unit 34 respectively send the state information of the third contact KM3 and the fourth contact KM4 acquired in real time to the second control subunit 45, the second control subunit 45 sends the two state information to the second logic subunit 43, and the second logic subunit 43 outputs the two state information to the driving subunit 41 after performing logic processing, so that the driving subunit 41 controls the second contact KM2 to be closed or opened, and controls the second protection unit 22 to be closed or opened.
For example, when the third contact KM3 and the fourth contact KM4 fail, the driving subunit 41 may control the first contact KM1 to be opened and control the first protection unit 21 to be opened, so as to cut off the path from the first contact KM1 to the interface circuit 2, i.e., path one; at the same time, the driving subunit 41 may control the second contact KM2 to open, and control the second protection subunit 22 to open, so as to cut off the path between the second contact KM2 and the interface circuit 2, i.e. the path two.
In one example, as shown in fig. 7, the first protection subunit 21 and the second protection subunit 22 may both employ a photoelectric coupler or a switching tube, and the driving subunit 41 may employ an and circuit. The model of the photoelectric coupler can be AQZ105 PhotoMOS.
Preferably, as shown in fig. 8, the first control subunit 44 and the second control subunit 45 may be both CPUs (central processing units), and the first logic subunit 42 and the second logic subunit 43 may be FPGAs (field Programmable Gate arrays), where the FPGAs include pins GPIO (which refers to general-purpose pins capable of being dynamically configured and controlled), Data logic (Data logic) modules, and bus interface (Local bus interface) modules.
Specifically, the first logic subunit 42 (i.e., the FPGA1) and the second logic subunit 43 (i.e., the FPGA2) are respectively controlled by the first control subunit 44 (i.e., the CPU1) and the second control subunit 45 (i.e., the CPU2), so that the FPGAs 1 and 2 output dynamic control signals to the and gate circuit 41, and further, the driving control on the safety relay KM is realized by the and gate circuit 41, so as to ensure that the control on the and gate circuit 41 can be cut off when the CPU1 or the CPU2 has a serious fault, so as to cut off the control on the safety relay KM, wherein the power supply of the safety and gate circuit 41 can be provided by a safety power supply.
The FPGAs (i.e., FPGA1, FPGA2) communicate with the CPUs (i.e., CPU1, CPU2) via an FSMC (Flexible static memory Controller) high-speed communication bus, the FPGAs can bridge the CPU and the pulse output interface, and the FPGAs can output 1.5K or 50K pulse signals according to the received CPU information to drive the and gate 41.
Specifically, taking the FPGA1 and the CPU1 as examples, the CPU1 sends read-write information to the FPGA1 at regular time through parallel I/O, when the FPGA1 receives a write message for generating a pulse, the internal counter starts counting, the 10-channel digital I/O interface outputs a corresponding pulse signal, and within a specified time, if the FPGA does not receive the write message for generating a pulse, the pulse output is turned off, otherwise, the pulse output is continued, and the counter is cleared and counts again. Meanwhile, the CPU1 can send a command for turning off the pulse output to the FPGA1, and the CPU1 can also send a watchdog self-checking command to the FPGA1, so that the safety self-checking function of the pulse output is realized, and the safety of the pulse output is ensured; the FPGA2 and the CPU2 perform similar controls and are not described in detail herein.
For the collection of the state information of the third contact KM3 and the fourth contact KM4, the state information of the third contact KM3 and the fourth contact KM4 is collected by dynamic code transmission to ensure safe collection, and the timing sequences of the direct collection (which may be performed by a triode circuit), the isolated collection performed by the third collection unit 33 and the fourth collection unit 34 by the first collection subunit 31 and the second collection subunit 32 are respectively as shown in fig. 9 and fig. 10 (taking a timing diagram of one contact as an example), where when a NODE is at a high level (i.e., logic "1") may represent that the contact state information is on, and when a NODE is at a low level (i.e., logic "0") may represent that the contact state information is off, a PWM is to collect a dynamic code transmission signal, and a RD is to a contact state information read-back signal.
It should be noted that, in this example, when the first logic subunit 42 and the second logic subunit 43 can respectively perform inverse logic processing on the level signal sent by the CPU1 and the signal sent by the CPU2, that is, the two may output level signals with logic opposite, for example, the first logic subunit 42 may output a high level and a low level, and it should be understood that the high level and the low level here sequentially represent inverse state information of the third contact KM3 and the fourth contact KM4, that is, the state information of the third contact KM3 and the fourth contact KM4 is a low level and a high level, and thus the second logic subunit 43 may output a low level and a high level.
As is clear from fig. 9 and 10, the RD signal matches the PWM signal when the contact is closed, but is high regardless of whether the PWM signal is a high level or a low level signal when the contact is open, due to the presence of the and circuit 41.
That is to say, the state information of the safety relay contact is collected through direct collection and isolation respectively, whether the safety relay is in fault or not is judged according to the state information, when the two collected signals are the same, it is indicated that the safety relay is not in fault, when the two collected signals are different, it is indicated that the safety relay is in fault (for example, the normally open contact KM3 is out of work and is adhered), namely when the CPU1 and the CPU2 collect the normally open contact KM3 to be out of work and adhered, the CPU1 and the CPU2 can carry out fault safety processing, and then the photo MOS of the photo coupler is controlled to be disconnected, so that the photo coupler is guided to the safety test, and the interface circuit is prevented.
To sum up, the power control circuit of the utility model can realize the safety control of the interface circuit through the protection unit, thereby ensuring that the interface circuit outputs correct and safe control commands; the aim of multiple safety protection is achieved through isolated communication between the inverse logic and the CPU, control invalidity is greatly reduced, and output of wrong control commands is avoided.
Fig. 10 is a block diagram of a control device for a switch according to an embodiment of the present invention.
As shown in fig. 10, the control device 1000 for a switch includes the power control circuit 100 of the present invention.
In this embodiment, when the number of the power control circuits 100 is 2, the control device 1000 for the switch adopts a two-out-of-two structure, that is, the control of the interface circuit 2 is realized by 4 CPUs, if the control of one of the CPUs fails, the control is suspended, and the power control circuits 100 are controlled to cut off the path; only when the control of 4 CPUs is normal, the control command is output through the interface circuit 2, so that the control safety is greatly improved.
The utility model discloses a controlling means for switch, through the utility model discloses a source control circuit can realize the safety control to interface circuit through the protection unit to ensure that interface circuit outputs correct, safe control command.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. A power control circuit, comprising:
a switch unit;
the protection unit is connected with the switch unit in series and connected between a first power supply and an interface circuit, wherein the interface circuit is connected with turnout control equipment;
the acquisition unit is connected with the switch unit and used for acquiring the state information of the switch unit;
the control unit is respectively connected with the switch unit, the protection unit and the acquisition unit and is used for controlling the on-off of the switch unit and controlling the on-off of the protection unit according to the state information.
2. The power supply control circuit according to claim 1, wherein the switching unit includes:
the safety relay comprises a first contact, a second contact, a third contact and a fourth contact, wherein the first contact is a normally open contact, the second contact is a normally closed contact, the fourth contact is a normally closed contact, the first contact is connected with a first pole of a first power supply, the second contact is connected with a second pole of the first power supply, and the control end of the first contact and the control end of the second contact are connected with the control unit.
3. The power control circuit of claim 2, wherein the protection unit comprises:
a first protection subunit connected with the first contact;
a second protection subunit connected with the second contact;
the control ends of the first protection subunit and the second protection subunit are connected with the control unit.
4. The power control circuit of claim 3, wherein the acquisition unit comprises:
the first acquisition subunit is used for acquiring the state information of the third contact and sending the state information of the third contact to the control unit;
the second acquisition subunit is used for acquiring the state information of the fourth contact and sending the state information of the fourth contact to the control unit;
the third acquisition subunit is used for acquiring the state information of the third contact and sending the state information of the third contact to the control unit;
the fourth acquisition subunit is used for acquiring the state information of the fourth contact and sending the state information of the fourth contact to the control unit;
the first acquisition subunit and the third acquisition subunit are arranged in an isolated mode, and the second acquisition subunit and the fourth acquisition subunit are arranged in an isolated mode.
5. The power supply control circuit of claim 4, wherein the control unit comprises:
the driving subunit is respectively connected with the first contact, the second contact, the first protection subunit and the control end of the second protection subunit;
the first logic subunit and the second logic subunit are both connected with the driving subunit;
a first control subunit and a second control subunit, wherein the first control subunit is respectively connected with the first acquisition subunit, the second acquisition subunit and the first logic subunit, the second control subunit is respectively connected with the third acquisition subunit, the fourth acquisition subunit and the second logic subunit, the first control subunit is configured to control the first contact point and the second contact point according to the state information of the third contact point and the fourth contact point, controlling the first contact to be closed or opened through the first logic subunit and the driving subunit, and controlling the first protection subunit to be closed or opened, the second control subunit being configured to control the second protection subunit to be closed or opened according to the state information of the third contact and the fourth contact, and controlling the second contact to be closed or opened and controlling the second protection subunit to be closed or opened through the second logic subunit and the driving subunit.
6. The power control circuit of claim 2, wherein the first contact, the second contact, the third contact, and the fourth contact act in unison.
7. The power control circuit as claimed in claim 5, wherein the first protection subunit and the second protection subunit both use a photoelectric coupler or a switching tube, and the driving subunit uses an AND circuit.
8. The power control circuit of claim 5, wherein the first control subunit and the first logic subunit, and the second control subunit and the second logic subunit, each communicate over an FSMC bus.
9. A control device for a switch, characterized in that it comprises at least one power supply control circuit according to any one of claims 1 to 8.
10. The control device for the switch according to claim 9, wherein when the number of said power supply control circuits is 2, said control device for the switch adopts a two-out-of-two configuration.
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| CN201921452236.3U CN210793215U (en) | 2019-09-02 | 2019-09-02 | Power supply control circuit and control device for turnout with same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113562017A (en) * | 2021-08-19 | 2021-10-29 | 中铁二十四局集团上海电务电化有限公司 | Railway switch interlocking control system |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113562017A (en) * | 2021-08-19 | 2021-10-29 | 中铁二十四局集团上海电务电化有限公司 | Railway switch interlocking control system |
| CN113562017B (en) * | 2021-08-19 | 2023-02-28 | 中铁二十四局集团上海电务电化有限公司 | Railway turnout interlocking control system |
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