Frequency shift control circuit

Abstract

The application discloses a frequency shift control circuit, which comprises an encoding condition output circuit (100) and a frequency shift track circuit (200); wherein the encoding condition output circuit (100) comprises a microcontroller (110), an encoding output relay group (112) and a frequency shift encoding sending box (150), the microcontroller (110) is used for controlling the encoding output relay group (112) to generate and output an encoding condition instruction to the frequency shift encoding sending box (150) according to a received frequency shift encoding instruction, and the frequency shift encoding sending box (150) is used for outputting a frequency shift input signal to the frequency shift track circuit (200) according to the encoding condition instruction; and the frequency shift track circuit (200) is used for outputting a frequency shift signal to a steel rail according to a received frequency shift control instruction and the frequency shift input signal. In the scheme, the frequency shift input signal is generated by the microcontroller and the relay group, so that the volume of the frequency shift control circuit is obviously reduced compared with a traditional frequency shift control circuit, and wiring workload and maintenance workload are smaller.

Description

Technical Field

[0001] This invention relates to the field of frequency shift control, and more particularly to a frequency shift control circuit. Background Technology

[0002] The frequency-shift track circuit is a track circuit that transmits frequency-shift information. It forms the basis of frequency-shift automatic block signaling and is also used to monitor the vacancy of the block section. The frequency-shift track circuit uses frequency parameters as control information and employs frequency modulation to shift the low-frequency modulated signal to a higher frequency (carrier frequency f0) to form a frequency-shifted signal with constant oscillation and a frequency that periodically changes with the amplitude of the low-frequency signal.

[0003] In a standard configuration, the frequency-shift input signal is generated by a relay circuit that controls the coil of a gravity-type safety relay to lift or lower, forming different coded combinations. This signal is then sent to the frequency-shift track circuit. The frequency-shift track circuit outputs a specific set of frequency-shift signals to a specific rail based on the coded information in the received input signal. Different frequency-shift input signals can transmit different ground information.

[0004] In the aforementioned relay circuits, the frequency-shift input signal needs to be generated by driving the corresponding gravity-type relay, which serves as the control medium. However, gravity-type relays are bulky, require extensive wiring, and are difficult to maintain. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a frequency shift control circuit that is small in size, has simple wiring, and is easy to maintain.

[0006] To achieve the objective of this invention, an embodiment of this invention provides a frequency shift control circuit, which includes an encoding condition output circuit and a frequency shift track circuit.

[0007] The encoding condition output circuit includes a microcontroller, an encoding output relay group, and a frequency shift encoding transmitter box. The microcontroller is used to control the encoding output relay group to generate encoding condition instructions and output the encoding condition instructions to the frequency shift encoding transmitter box according to the received frequency shift encoding instructions. The frequency shift encoding transmitter box is used to output a frequency shift input signal to the frequency shift track circuit according to the encoding condition instructions.

[0008] The frequency shift track circuit is used to generate and output frequency shift signals to the rails based on the received frequency shift control commands and frequency shift input signals.

[0009] In one particular embodiment, the frequency shift track circuit includes a microcontroller, a first set of frequency shift output relays, and a second set of frequency shift output relays, wherein the number of frequency shift output relays in the first set of frequency shift output relays and the second set of frequency shift output relays is the same; the frequency shift input signal output by the frequency shift encoding transmitter box includes the first set of frequency shift input signals and the second set of frequency shift input signals;

[0010] The frequency-shift track circuit generates and outputs a frequency-shift signal to the rail based on the received frequency-shift control command and frequency-shift input signal, including:

[0011] According to the frequency shift control command, the microcontroller of the frequency shift track circuit controls the first group of frequency shift output relays and the second group of frequency shift output relays to generate a first frequency shift signal and a second frequency shift signal respectively based on the first group of frequency shift input signals and the second group of frequency shift input signals, and outputs the first frequency shift signal and the second frequency shift signal to the corresponding rail section.

[0012] In one particular embodiment, the encoding condition output circuit further includes a first optocoupler group and a second optocoupler group;

[0013] The microcontroller controls the encoding output relay group to generate encoding condition commands through the first optocoupler group, and outputs the encoding condition commands to the frequency shift encoding transmitter box;

[0014] The coded output relay group feeds back its operating status to the microcontroller through the corresponding connected second optocoupler group.

[0015] In one particular embodiment, the frequency shift track circuit further includes a first group of third optocouplers, a second group of third optocouplers, and a fourth group of optocouplers, and the number of third optocouplers in the first group of third optocouplers and the second group of third optocouplers is the same.

[0016] The microcontroller of the frequency-shift track circuit, according to the frequency-shift control command, controls the first group of frequency-shift output relays and the second group of frequency-shift output relays to generate a first frequency-shift signal and a second frequency-shift signal respectively based on the first group of frequency-shift input signals and the second group of frequency-shift input signals, and outputs the first frequency-shift signal and the second frequency-shift signal to the corresponding rail section, including:

[0017] The microcontroller controls the first and second sets of frequency-shift output relays via the first and second sets of third optocouplers to generate a first frequency-shift signal and a second frequency-shift signal, respectively, and outputs the first and second frequency-shift signals to the corresponding rail sections; and

[0018] The first group of frequency-shifting output relays and the second group of frequency-shifting output relays feed back their operating status to the microcontroller through the corresponding fourth optocoupler group.

[0019] In one specific embodiment, the encoding condition output circuit further includes a primary encoding relay and a correspondingly connected second optocoupler; wherein...

[0020] The microcontroller controls the encoding power input of the encoding output relay group through the primary encoding relay; and the primary encoding relay feeds back its operating status to the microcontroller through the corresponding connected second optocoupler.

[0021] In one particular embodiment, the frequency shift track circuit also includes two first-stage frequency shift relays and a corresponding fourth optocoupler.

[0022] The microcontroller of the frequency shift track circuit controls the first group of frequency shift output relays and the second group of frequency shift output relays through two first-level frequency shift relays to receive the first group of frequency shift input signals and the second group of frequency shift input signals, respectively; and the two first-level frequency shift relays respectively feed back their operating status to the microcontroller of the frequency shift track circuit through the corresponding fourth optocoupler.

[0023] In one particular embodiment, the coding condition output circuit has two sets of coding power supplies, and the coding output relay group generates a coding condition command based on the input of the two sets of coding power supplies respectively, and outputs the two coding condition commands to the frequency shift coding transmitter box.

[0024] In one particular embodiment, the microcontroller includes a first microcontroller and a second microcontroller, the first optocoupler group includes a first set of first optocouplers and a second set of first optocouplers connected in series, and the encoded conditional output circuit further includes a first secure AND gate.

[0025] The first and second microcontrollers control the primary encoding relays to input encoding power to the encoding output relay group through the first safety AND gate. Furthermore, the first and second microcontrollers control the encoding output relay group to generate encoding condition instructions and output the encoding condition instructions to the frequency shift encoding transmitter box according to the frequency shift encoding instructions.

[0026] In one particular embodiment, the microcontroller of the encoding condition output circuit is multiplexed by the frequency shift track circuit as the microcontroller of the frequency shift track circuit.

[0027] In a specific embodiment, the microcontroller of the frequency-shifting track circuit includes a third microcontroller and a fourth microcontroller. The first group of third optocouplers includes a third group of third optocouplers and a fourth group of third optocouplers; the second group of third optocouplers includes a fifth group of third optocouplers and a sixth group of third optocouplers; and the number of third optocouplers in the third, fourth, fifth, and sixth groups of third optocouplers is equal; the third optocouplers in the third group of third optocouplers are correspondingly connected to the third optocouplers in the fourth group of third optocouplers, and the third optocouplers in the fifth group of third optocouplers are correspondingly connected to the third optocouplers in the sixth group of third optocouplers; the frequency-shifting track circuit also includes two second secure AND gates; wherein...

[0028] The third and fourth microcontrollers control the first group of frequency shift output relays to receive the first group of frequency shift input signals through a second safety AND gate. The third microcontroller, according to the frequency shift control command, controls the first group of frequency shift output relays to generate a first frequency shift signal based on the first group of frequency shift input signals via a third group of third optocouplers, while the fourth microcontroller, according to the frequency shift control command, controls the first group of frequency shift output relays to generate a first frequency shift signal based on the first group of frequency shift input signals and outputs the first frequency shift signal to the corresponding rail section via a fourth group of third optocouplers. The third and fourth microcontrollers also control the second group of frequency shift output relays to receive the second group of frequency shift input signals through another second safety AND gate. Furthermore, the third microcontroller, according to the frequency shift control command, controls the second group of frequency shift output relays to generate a second frequency shift signal based on the second group of frequency shift input signals via a fifth group of third optocouplers, while the fourth microcontroller, according to the frequency shift control command, controls the second group of frequency shift output relays to generate a second frequency shift signal based on the second group of frequency shift input signals and outputs the second frequency shift signal to the corresponding rail section via a sixth group of third optocouplers.

[0029] According to the above scheme, since the frequency shift input signal is generated by the microcontroller, the matching encoding output relay group and the frequency shift encoding transmitter box, and the volume of the microcontroller, the encoding output relay group and the frequency shift encoding transmitter box is significantly smaller than that of each gravity relay in the relay circuit, the volume of the encoding condition output circuit is significantly smaller than that of the relay circuit, and the integration is higher, the wiring is significantly smaller, and the maintenance workload is smaller.

[0030] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0031] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of the present invention and do not constitute a limitation on the technical solutions of the present invention.

[0032] Figure 1 A schematic diagram of a frequency shift control circuit provided in an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of the frequency shift track circuit provided in an embodiment of the present invention is shown;

[0034] Figure 3 A schematic diagram of the encoding condition output circuit provided in an embodiment of the present invention is shown;

[0035] Figure 4 A schematic diagram of the encoding condition output circuit provided in an embodiment of the present invention is shown;

[0036] Figure 5 A schematic diagram of the frequency shift track circuit provided in an embodiment of the present invention is shown. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be arbitrarily combined with each other.

[0038] The steps illustrated in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases the steps shown or described may be performed in a different order than that presented here.

[0039] To address the aforementioned technical problems, embodiments of the present invention provide a frequency shift control circuit. For example... Figure 1 As shown, the frequency shift control circuit includes an encoding condition output circuit 100 and a frequency shift track circuit 200.

[0040] The encoding condition output circuit 100 includes a microcontroller 110, an encoding output relay group 112, and a frequency shift encoding transmitter box 150. The microcontroller 110 is used to control the encoding output relay group 112 to generate encoding condition instructions and output the encoding condition instructions to the frequency shift encoding transmitter box 150 according to the received frequency shift encoding instructions. The frequency shift encoding transmitter box 150 is used to output a frequency shift input signal to the frequency shift track circuit 200 according to the encoding condition instructions.

[0041] The frequency shift track circuit 200 is used to generate and output a frequency shift signal to the rail based on the received frequency shift control command and frequency shift input signal.

[0042] In this embodiment, the encoding condition output circuit 100 includes a microcontroller 110 and an encoding output relay group 112. The frequency shift input signal is generated by the microcontroller 110, the matching encoding output relay group 112, and the frequency shift encoding transmitter box. Therefore, compared with the traditional relay circuit composed of various gravity relays, the encoding condition output circuit 100 in this embodiment is significantly smaller in size and has a higher integration, resulting in less wiring and less maintenance work in the later stage.

[0043] In a particular embodiment, such as Figure 2 As shown, the frequency shift track circuit 200 includes a microcontroller, a first set of frequency shift output relays 214, and a second set of frequency shift output relays 216, wherein the number of frequency shift output relays in the first set of frequency shift output relays 214 and the second set of frequency shift output relays 216 is the same; the frequency shift input signal output by the frequency shift encoding transmitter 150 includes the first set of frequency shift input signals and the second set of frequency shift input signals. In a particular embodiment, the microcontroller 110 is multiplexed by the frequency shift track circuit 200 as the microcontroller of the frequency shift track circuit 200.

[0044] Here, the first set of frequency shift output relays 214 and the second set of frequency shift output relays 216 can be ordinary relays or onboard electromagnetic safety relays; compared with gravity safety relays, the main advantages of onboard electromagnetic safety relays are that they have safety guidance, as well as small size and high integration.

[0045] The frequency shift track circuit 200 generates and outputs a frequency shift signal to the rail based on the received frequency shift control command and frequency shift input signal, including:

[0046] The microcontroller of the frequency-shifting track circuit 200, according to the frequency-shifting control command, controls the first group of frequency-shifting output relays 214 and the second group of frequency-shifting output relays 216 to generate a first frequency-shifted signal and a second frequency-shifted signal respectively based on the first group of frequency-shifting input signals and the second group of frequency-shifting input signals, and outputs the first frequency-shifted signal and the second frequency-shifted signal to the corresponding rail sections. It should be noted that the first frequency-shifted signal and the second frequency-shifted signal are sent to different rail sections; therefore, the state of the signals recovered from different rail sections and the comparison of the recovered signal states can provide certain feedback information.

[0047] In a particular embodiment, such as Figure 3As shown, the encoding condition output circuit 100 also includes a first optocoupler group 120 and a second optocoupler group 122. Both the first optocoupler group 120 and the second optocoupler group 122 include several optocouplers. Optocouplers transmit electrical signals using light as a medium. They provide excellent isolation between input and output electrical signals, and therefore are widely used in various circuits. Due to the mutual isolation between the input and output of the optocoupler and the unidirectional nature of the electrical signal transmission, they possess excellent electrical insulation and anti-interference capabilities.

[0048] The microcontroller 110 controls the encoding output relay group 112 to generate encoding condition commands through the first optocoupler group 120, and outputs the encoding condition commands to the frequency shift encoding transmitter 150.

[0049] The coded output relay group 112 feeds back its operating status to the microcontroller 110 through the corresponding connected second optocoupler group 122. Here, each optocoupler in the corresponding second optocoupler group 122 is used to feed back the status of the coded output relay corresponding to that optocoupler to the microcontroller 110. Because the second optocoupler group 122 is added to the circuit, the circuit's anti-interference capability is strengthened.

[0050] In a particular embodiment, such as Figure 2 As shown, the frequency shift track circuit 200 also includes a first group of third optocouplers 224, a second group of third optocouplers 226 and a fourth group of optocouplers 222, and the number of third optocouplers in the first group of third optocouplers 224 and the second group of third optocouplers 226 is the same.

[0051] The microcontroller of the frequency shift track circuit 200, according to the frequency shift control command, controls the first group of frequency shift output relays 214 and the second group of frequency shift output relays 216 to generate a first frequency shift signal and a second frequency shift signal respectively based on the first group of frequency shift input signals and the second group of frequency shift input signals, and outputs the first frequency shift signal and the second frequency shift signal to the corresponding rail section, including:

[0052] The microcontroller 110 controls the first group of frequency shift output relays 214 and the second group of frequency shift output relays 216 via the first group of third optocouplers 224 and the second group of third optocouplers 226 to generate a first frequency shift signal and a second frequency shift signal, and outputs the first and second frequency shift signals to the corresponding rail sections; and

[0053] The first group of frequency shift output relays 214 and the second group of frequency shift output relays 216 feed back their operating status to the microcontroller 110 through the corresponding fourth optocoupler group 222.

[0054] In a particular embodiment, such as Figure 3 As shown, the encoding condition output circuit 100 also includes a first-stage encoding relay 130 and a correspondingly connected second optocoupler 122; wherein,

[0055] The microcontroller 110 controls the encoding power input of the encoding output relay group 112 through the primary encoding relay 130; and the primary encoding relay 130 feeds back its operating status to the microcontroller 110 through the corresponding connected second optocoupler 122. Here, the primary encoding relay 130 is used to operate according to the instructions of the microcontroller 110, to input the input power (i.e., encoding power) connected to the primary encoding relay 130 to the encoding output relay group 112, or not to input the input power connected to the primary encoding relay 130 to the encoding output relay group 112; that is, the primary encoding relay 130 amplifies the signal output by the microcontroller 110, thereby controlling the encoding output relay group 112.

[0056] In a particular embodiment, such as Figure 2 As shown, the frequency shift track circuit 200 also includes two first-stage frequency shift relays 230 and a corresponding fourth optocoupler 222.

[0057] The microcontroller of the frequency shift track circuit 200 controls the first group of frequency shift output relays 214 and the second group of frequency shift output relays 216 to receive the first group of frequency shift input signals and the second group of frequency shift input signals respectively through two first-level frequency shift relays 230; and the two first-level frequency shift relays 230 respectively feed back their operating status to the microcontroller of the frequency shift track circuit 200 through the corresponding fourth optocoupler 222.

[0058] In a particular embodiment, such as Figure 3 As shown, the encoding condition output circuit 100 has two sets of encoding power supplies, and the encoding output relay group 112 generates an encoding condition command according to the input of the two sets of encoding power supplies, and outputs the two encoding condition commands to the frequency shift encoding transmitter box 150.

[0059] In a particular embodiment, such as Figure 4As shown, the microcontroller 110 includes a first microcontroller 310 and a second microcontroller 320, the first optocoupler group 120 includes a first group of first optocouplers 340 and a second group of first optocouplers 342 connected in series, and the encoded condition output circuit 100 also includes a first safety AND gate 330.

[0060] The first microcontroller 310 and the second microcontroller 320 control the first-level encoding relay 130 to input encoding power to the encoding output relay group 112 through the first safety AND gate 330. In addition, the first microcontroller 310 and the second microcontroller 320 control the encoding output relay group 112 to generate encoding condition instructions and output encoding condition instructions to the frequency shift encoding transmitter 150 according to the frequency shift encoding instructions.

[0061] In one particular embodiment, the microcontroller of the frequency shift track circuit 200 includes a third microcontroller and a fourth microcontroller. In an alternative embodiment, such as Figure 5 As shown, the first microcontroller 310 and the second microcontroller 320 are multiplexed by the frequency shift track circuit 200 as the third and fourth microcontrollers of the frequency shift track circuit 200, respectively. The first group of third optocouplers 224 includes a third group of third optocouplers 380 and a fourth group of third optocouplers 382; the second group of third optocouplers 226 includes a fifth group of third optocouplers 384 and a sixth group of third optocouplers 386; and the number of third optocouplers in the third group of third optocouplers 380, the fourth group of third optocouplers 382, ​​the fifth group of third optocouplers 384, and the sixth group of third optocouplers 386 is equal; the third optocouplers in the third group of third optocouplers 380 are correspondingly connected to the third optocouplers in the fourth group of third optocouplers 382, ​​and the third optocouplers in the fifth group of third optocouplers 384 are correspondingly connected to the third optocouplers in the sixth group of third optocouplers 386; the frequency shift track circuit 200 also includes two second secure AND gates 332; wherein,

[0062] The third and fourth microcontrollers control the first group of frequency shift output relays 214 to receive the first group of frequency shift input signals through a second safety AND gate 332. The third microcontroller, according to the frequency shift control command, controls the first group of frequency shift output relays 214 to generate a first frequency shift signal based on the first group of frequency shift input signals via a third group of third optocouplers 380, and the fourth microcontroller, according to the frequency shift control command, controls the first group of frequency shift output relays 214 to generate a first frequency shift signal based on the first group of frequency shift input signals and output the first frequency shift signal to the corresponding rail section. The third and fourth microcontrollers also control the second group of frequency shift output relays 216 to receive the second group of frequency shift input signals through another second safety AND gate 332. Furthermore, the third microcontroller, according to the frequency shift control command, controls the second group of frequency shift output relays 216 to generate a second frequency shift signal based on the second group of frequency shift input signals via a fifth group of third optocouplers 384, and the fourth microcontroller, according to the frequency shift control command, controls the second group of frequency shift output relays 216 to generate a second frequency shift signal based on the second group of frequency shift input signals and output the second frequency shift signal to the corresponding rail section.

[0063] While the embodiments disclosed in this invention are as described above, the above content is merely for the purpose of facilitating understanding of this invention and is not intended to limit the invention. Any person skilled in the art to which this invention pertains may make any modifications and changes to the form and details of the implementation without departing from the spirit and scope disclosed in this invention; however, the scope of patent protection of this invention shall still be determined by the scope defined in the appended claims.

Claims

1. A frequency shift control circuit, characterized in that, It includes an encoding conditional output circuit (100) and a frequency shift track circuit (200); wherein, The encoding condition output circuit (100) includes a microcontroller (110), an encoding output relay group (112), and a frequency shift encoding transmitter box (150). The microcontroller (110) is used to control the encoding output relay group (112) to generate and output encoding condition instructions to the frequency shift encoding transmitter box (150) according to the received frequency shift encoding instructions. The frequency shift encoding transmitter box (150) is used to output a frequency shift input signal to the frequency shift track circuit (200) according to the encoding condition instructions. The frequency shift track circuit (200) is used to output a frequency shift signal to the rail according to the received frequency shift control command and the frequency shift input signal; The encoding condition output circuit (100) further includes a first optocoupler group (120) and a second optocoupler group (122); wherein, The microcontroller (110) controls the encoding output relay group (112) via the first optocoupler group (120) to generate and output encoding condition commands to the frequency shift encoding transmitter box (150); and The encoded output relay group (112) feeds back the operating status of the encoded output relay group (112) to the microcontroller (110) through the corresponding connected second optocoupler group (122); The encoding condition output circuit (100) further includes a first-level encoding relay (130) and a correspondingly connected second optocoupler (122); wherein, The microcontroller (110) controls the encoding power input of the encoding output relay group (112) through the first-level encoding relay (130); and the first-level encoding relay (130) feeds back the operating status of the first-level encoding relay (130) to the microcontroller (110) through the corresponding connected second optocoupler (122).

2. The frequency shift control circuit according to claim 1, wherein, The frequency shift track circuit (200) includes a microcontroller, a first group of frequency shift output relays (214), and a second group of frequency shift output relays (216), wherein the number of frequency shift output relays in the first group of frequency shift output relays (214) and the second group of frequency shift output relays (216) is the same; the frequency shift input signal output by the frequency shift encoding transmitter (150) includes the first group of frequency shift input signals and the second group of frequency shift input signals; The frequency-shifting track circuit (200) outputs a frequency-shifting signal to the rail according to the received frequency-shifting control command and the frequency-shifting input signal, including: The microcontroller of the frequency shift track circuit (200) controls the first group of frequency shift output relays (214) and the second group of frequency shift output relays (216) to generate a first frequency shift signal and a second frequency shift signal respectively according to the first group of frequency shift input signals and the second group of frequency shift input signals, and outputs the first frequency shift signal and the second frequency shift signal to the corresponding rail section according to the frequency shift control command.

3. The frequency shift control circuit according to claim 2, characterized in that, The frequency shift track circuit (200) further includes a first group of third optocouplers (224), a second group of third optocouplers (226), and a fourth group of optocouplers (222), and the number of third optocouplers in the first group of third optocouplers (224) and the second group of third optocouplers (226) is the same; The microcontroller of the frequency shift track circuit (200) controls the first group of frequency shift output relays (214) and the second group of frequency shift output relays (216) to generate a first frequency shift signal and a second frequency shift signal respectively based on the first group of frequency shift input signals and the second group of frequency shift input signals, and outputs the first frequency shift signal and the second frequency shift signal to the corresponding rail section, including: The microcontroller (110) controls the first group of frequency shift output relays (214) and the second group of frequency shift output relays (216) to generate the first frequency shift signal and the second frequency shift signal respectively through the first group of third optocouplers (224) and the second group of third optocouplers (226), and outputs the first frequency shift signal and the second frequency shift signal to the corresponding rail section; and The first group of frequency shift output relays (214) and the second group of frequency shift output relays (216) feed back their operating status to the microcontroller (110) through the corresponding fourth optocoupler group (222).

4. The frequency shift control circuit according to claim 3, characterized in that, The frequency-shifting track circuit (200) also includes two first-stage frequency-shifting relays (230) and a correspondingly connected fourth optocoupler (222); wherein, The microcontroller of the frequency shift track circuit (200) controls the first group of frequency shift output relays (214) and the second group of frequency shift output relays (216) to receive the first group of frequency shift input signals and the second group of frequency shift input signals respectively through the two first-level frequency shift relays (230); and the two first-level frequency shift relays (230) respectively feed back the operation status of the two first-level frequency shift relays (230) to the microcontroller of the frequency shift track circuit (200) through the corresponding connected fourth optocoupler (222).

5. The frequency shift control circuit according to claim 1, characterized in that, The encoding condition output circuit (100) has two sets of encoding power supplies, and the encoding output relay group (112) generates an encoding condition instruction according to the input of the two sets of encoding power supplies, and outputs the two encoding condition instructions to the frequency shift coding transmitter box (150).

6. The frequency shift control circuit according to claim 2, characterized in that, The microcontroller (110) is multiplexed by the frequency shift track circuit (200) as the microcontroller of the frequency shift track circuit (200).

7. The frequency shift control circuit according to claim 1, characterized in that, The microcontroller (110) includes a first microcontroller (310) and a second microcontroller (320), the first optocoupler group (120) includes a first group of first optocouplers (340) and a second group of first optocouplers (342) connected in series, and the encoding condition output circuit (100) further includes a first secure AND gate (330). The first microcontroller (310) and the second microcontroller (320) control the first-level encoding relay (130) to input encoding power to the encoding output relay group (112) through the first safety AND gate (330); and according to the frequency shift encoding instruction, the first microcontroller (310) controls the encoding output relay group (112) through the first group of first optocouplers (340) and the second microcontroller (320) through the second group of first optocouplers (342) to generate encoding condition instructions and output the encoding condition instructions to the frequency shift encoding transmitter box (150).

8. The frequency shift control circuit according to claim 4, characterized in that, The microcontroller of the frequency shift track circuit (200) includes a third microcontroller and a fourth microcontroller. The first group of third optocouplers (224) includes a third group of third optocouplers (380) and a fourth group of third optocouplers (382). The second group of third optocouplers (226) includes a fifth group of third optocouplers (384) and a sixth group of third optocouplers (386). The number of third optocouplers in the third group of third optocouplers (380), the fourth group of third optocouplers (382), the fifth group of third optocouplers (384), and the sixth group of third optocouplers (386) is equal. The third optocoupler in the third group of third optocouplers (380) is connected to the third optocoupler in the fourth group of third optocouplers (382), and the third optocoupler in the fifth group of third optocouplers (384) is connected to the third optocoupler in the sixth group of third optocouplers (386). The frequency shift track circuit also includes two second safety AND gates (332). The third microcontroller and the fourth microcontroller control the first group of frequency shift output relays (214) to receive the first group of frequency shift input signals through a second safety AND gate (332). The third microcontroller, according to the frequency shift control command, controls the first group of frequency shift output relays (214) through the third group of third optocouplers (380), and the fourth microcontroller, according to the frequency shift control command, controls the first group of frequency shift output relays (214) through the fourth group of third optocouplers (382) to generate the first frequency shift signal based on the first group of frequency shift input signals and output the first frequency shift signal to the corresponding rail section. Furthermore, the third microcontroller and the fourth microcontroller control the second group of frequency shift output relays (216) to receive the second group of frequency shift input signals through another second safety AND gate (332). The third microcontroller controls the second group of frequency shift output relays (216) to generate a second frequency shift signal based on the second group of frequency shift input signals and output the second frequency shift signal to the corresponding rail section according to the second group of frequency shift input signals.

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