A multi-type signal compatible transmission management circuit

Abstract

The embodiment of the present disclosure provides a multi-type signal compatible transmission management circuit, and relates to the technical field of engineering control. After connecting a signal interface with a line interface of a load device, the transmission management circuit is used to sample a load feedback signal output by the line interface or to realize the purpose of transmitting a load control signal by the line interface. The transmission management circuit is compatible with at least seven types of commonly used industrial signals, including an analog feedback signal input, a pulse feedback signal input, a level feedback signal input, a switching value feedback signal input, an analog control signal output, a pulse control signal output and a level control signal output. The circuit structure of the transmission management circuit is simple, which not only reduces the occupied area and cost of the circuit, but also avoids the mutual crosstalk problem caused by integration between different types of circuits.

Description

Technical Field

[0001] This disclosure relates to the field of engineering control technology, and more specifically, to a transmission management circuit compatible with multiple types of signals. Background Technology

[0002] In actual engineering operations, various signal types may be processed, and the signal types, number of interfaces, functions, and other related parameters of the equipment involved in these operations are all uncertain. To achieve signal interaction with this equipment, current methods typically integrate different types of circuits and their interfaces into a single unit. Each type of circuit and its interface is used to achieve signal interaction with only one type of signal from the equipment, which not only increases the circuit footprint but also raises costs. Summary of the Invention

[0003] In view of this, the present disclosure provides a transmission management circuit that is compatible with multiple signal types, reducing the circuit footprint and lowering the circuit cost.

[0004] This disclosure provides a transmission management circuit compatible with multiple signal types, the transmission management circuit including: A signal interface is provided, which is connected to the line interface of a load device. The signal interface is used to receive the load feedback signal output by the line interface; or, the signal interface is used to output a load control signal to the line interface. The load feedback signal includes any one of analog feedback signal, pulse feedback signal, level feedback signal, and switch feedback signal. The load control signal includes any one of analog control signal, pulse control signal, and level control signal. An input conditioning circuit module is provided, the input terminal of which is electrically connected to the signal interface. The input conditioning circuit module is used to receive the load feedback signal or the load control signal. When the load feedback signal includes the switch feedback signal, the input conditioning circuit module is also connected to a reference voltage. An output conditioning circuit module, the output terminal of which is electrically connected to the signal interface, is used to output the load control signal or the reference voltage; The processing module is electrically connected to both the input conditioning circuit module and the output conditioning circuit module. The processing module samples the load feedback signal connected to the input conditioning circuit module. When the load feedback signal includes the switching feedback signal, the processing module simultaneously controls the output conditioning circuit module to output the reference voltage. Alternatively, the processing module controls the output conditioning circuit module to output the load control signal and samples the load control signal connected to the input conditioning circuit module, adjusting the load control signal based on the sampling results.

[0005] In some embodiments, the processing module is further configured to control the output conditioning circuit module to output the reference voltage. When the actual voltage connected to the input conditioning circuit module is less than the reference voltage, the processing module determines that the line under test between the signal interface and the load device is normal; or, when the actual voltage collected by the processing module is equal to the reference voltage, the processing module determines that the line under test is open-circuited; or, when the actual voltage collected by the processing module is 0, the processing module determines that the line under test is short-circuited. Alternatively, the processing module is further configured to control the output conditioning circuit module to output the reference voltage, and when the processing module acquires that the actual voltage is less than the reference voltage, it determines that the switch in the circuit under test is turned on; or, when the processing module acquires that the actual voltage is equal to the reference voltage, it determines that the switch in the circuit under test is turned off.

[0006] In some embodiments, the output conditioning circuit module includes: The first unidirectional path has its output terminal electrically connected to the signal interface and to the processing module. The first unidirectional path outputs the reference voltage based on the control of the processing module. The second unidirectional path has its output terminal electrically connected to the signal interface and to the processing module. The second unidirectional path outputs the load control signal based on the control of the processing module.

[0007] In some embodiments, the first unidirectional path includes: A first unidirectional conduction circuit, wherein the output terminal of the first unidirectional conduction circuit is electrically connected to the signal interface; The first switch has its output terminal electrically connected to the input terminal of the first unidirectional conduction circuit, and its control terminal is electrically connected to the processing module. A signal power supply, the output terminal of which is electrically connected to the input terminal of the first switch, is used to output the reference voltage; And / or, the second unidirectional pathway includes: A second unidirectional conduction circuit, the output terminal of which is electrically connected to the signal interface; The second switch has its output terminal electrically connected to the input terminal of the second unidirectional conduction circuit, and its control terminal electrically connected to the processing module. A power supply, the output terminal of which is electrically connected to the input terminal of the second switch, and the control terminal of which is electrically connected to the processing module, the power supply outputs the load control signal based on the control of the processing module.

[0008] In some embodiments, at least one of the first unidirectional conduction circuit and the second unidirectional conduction circuit further integrates an overvoltage / overcurrent protection unit.

[0009] In some embodiments, the input conditioning circuit module includes: A third unidirectional conduction circuit, wherein the input terminal of the third unidirectional conduction circuit is electrically connected to the signal interface, and the output terminal of the third unidirectional conduction circuit is electrically connected to the processing module.

[0010] In some embodiments, the third unidirectional conduction circuit also integrates an overvoltage / overcurrent protection unit.

[0011] In some embodiments, the transmission management circuit further includes: Primary fiber and backup fiber; The fiber optic module is electrically connected to the main fiber, the backup fiber, and the processing module. The processing module is further configured to transmit a target electrical signal to the fiber optic module when the main fiber is functioning normally, and the fiber optic module converts the target electrical signal into a target optical signal before transmitting it to the main fiber; or, the processing module is configured to transmit the target electrical signal to the fiber optic module when the main fiber is functioning abnormally and the backup fiber is functioning normally, and the fiber optic module converts the target electrical signal into a target optical signal before transmitting it to the backup fiber.

[0012] In some embodiments, the fiber optic module includes: A main fiber conversion unit is provided, with its first end connected to the main fiber and its second end electrically connected to the processing module. The main fiber conversion unit is used to convert the main state detection optical signal of the main fiber into a main state detection electrical signal. When the processing module determines that the main fiber is normal based on the main state detection electrical signal, it transmits the target electrical signal to the main fiber conversion unit. The main fiber conversion unit converts the target electrical signal into a target optical signal and then transmits it to the main fiber. A backup fiber conversion unit is provided, with its first end connected to the backup fiber and its second end electrically connected to the processing module. The backup fiber conversion unit is used to convert the backup status detection optical signal of the backup fiber into a backup status detection electrical signal. When the processing module determines that the main fiber is abnormal based on the main status detection electrical signal and that the backup fiber is normal based on the backup status detection electrical signal, it transmits the target electrical signal to the backup fiber conversion unit. The backup fiber conversion unit converts the target electrical signal into a target optical signal and then transmits it to the backup fiber. The fiber optic control unit is electrically connected to both the main fiber conversion unit and the backup fiber conversion unit. The fiber optic control unit is used to control the main fiber conversion unit to turn on when the main fiber is normal; or, the fiber optic control unit is used to control the backup fiber conversion unit to turn on when the main fiber is abnormal and the backup fiber is normal.

[0013] In some embodiments, the transmission management circuit further includes: A filtering module, wherein the input terminal of the filtering module is electrically connected to the signal interface, and the output terminal of the filtering module is electrically connected to the input terminal of the input conditioning circuit module; And / or, the transmission management circuit further includes: The EMC module is electrically connected to the signal interface.

[0014] In summary, this disclosure provides a transmission management circuit compatible with multiple signal types. After connecting the signal interface to the line interface of the load device, the transmission management circuit samples the load feedback signal output from the line interface or transmits load control signals to the line interface. It is compatible with at least seven types of commonly used industrial signals: analog feedback signal input, pulse feedback signal input, level feedback signal input, switch feedback signal input, analog control signal output, pulse control signal output, and level control signal output. The transmission management circuit has a simple circuit structure, which not only reduces the circuit's footprint and cost but also avoids the crosstalk problem caused by the integration of different types of circuits. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0016] Figure 1A circuit diagram of a first type of multi-signal compatible transmission management circuit provided in an embodiment of this disclosure; Figure 2 A circuit diagram of a second type of multi-signal compatible transmission management circuit provided in an embodiment of this disclosure; Figure 3 A circuit diagram of a third type of multi-signal compatible transmission management circuit provided in an embodiment of this disclosure; Figure 4 A circuit diagram of a fourth type of multi-signal compatible transmission management circuit provided in an embodiment of this disclosure; Figure 5 A circuit diagram of a fifth type of multi-signal compatible transmission management circuit provided in the embodiments of this disclosure.

[0017] Explanation of reference numerals in the attached figures: 100 signal interface; 200 load capacity devices, 210 line interfaces; 300 Input Conditioning Circuit Module, 310 Third Unidirectional Conductor Circuit; 400 Output conditioning circuit module, 410 First unidirectional path, 411 First unidirectional conduction circuit, 412 First switch, 413 Signal power supply, 420 Second unidirectional path, 421 Second unidirectional conduction circuit, 422 Second switch, 423 Power supply; 500 processing module; 610 Main fiber, 620 Backup fiber, 630 Fiber module, 631 Main fiber conversion unit, 632 Backup fiber conversion unit, 633 Fiber control unit; 710 filter module, 720EMC module. Detailed Implementation

[0018] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0019] As described in the background section, in actual engineering operations, various signal types may be processed, and the signal types, number of interfaces, functions, and other related parameters of the equipment involved in these operations are all uncertain. To achieve signal interaction with the equipment, existing methods typically integrate different types of circuits and their interfaces into a single unit. Each type of circuit and its interface is used to achieve signal interaction with one type of signal from the equipment, which not only increases the circuit footprint but also raises the circuit cost.

[0020] Based on this, embodiments of this disclosure provide a transmission management circuit compatible with multiple signal types, reducing the circuit footprint and lowering circuit costs. The transmission management circuit provided in these embodiments can be applied to signal interaction and detection in engineering control equipment, fire-fighting equipment, and other applications.

[0021] refer to Figure 1 The diagram shown is a circuit diagram of a first type of multi-signal compatible transmission management circuit provided in this embodiment of the present disclosure. The transmission management circuit provided in this embodiment includes: a signal interface 100, which is connected to a line interface 210 of a load device 200. The signal interface 100 is used to receive a load feedback signal output from the line interface 210; or, the signal interface 100 is used to output a load control signal to the line interface 210. The load feedback signal includes any one of analog feedback signals, pulse feedback signals, level feedback signals, and switch feedback signals. The load control signal includes any one of analog control signals, pulse control signals, and level control signals. The signal interface 100 may include a positive interface and a negative interface, and the line interface 210 also has corresponding positive and negative interfaces. The signal interface 100 and the line interface 210 are connected, meaning the positive interface of the signal interface 100 is connected to the positive interface of the line interface 210, and the negative interface of the signal interface 100 is connected to the negative interface of the line interface 210.

[0022] The transmission management circuit also includes: an input conditioning circuit module 300, whose input terminal is electrically connected to the signal interface 100, and is used to receive load feedback signals or load control signals; wherein, when the load feedback signal includes a switching feedback signal, the input conditioning circuit module 300 also receives a reference voltage. An output conditioning circuit module 400, whose output terminal is electrically connected to the signal interface 100, is used to output load control signals or a reference voltage. Both the input conditioning circuit module 300 and the output conditioning circuit module 400 are unidirectional signal transmission lines to prevent mutual interference between lines during signal input and output.

[0023] The transmission management circuit further includes a processing module 500, which is electrically connected to both the input conditioning circuit module 300 and the output conditioning circuit module 400. The processing module 500 samples the load feedback signal received by the input conditioning circuit module 300. When the load feedback signal includes a switching feedback signal, the processing module 500 simultaneously controls the output conditioning circuit module 400 to output a reference voltage; alternatively, the processing module 500 controls the output conditioning circuit module 400 to output a load control signal and samples the load control signal received by the input conditioning circuit module 300, adjusting the load control signal based on the sampling results. In some embodiments, the processing module 500 provided in this disclosure may include, but is not limited to, a microcontroller.

[0024] The transmission management circuit provided in this embodiment, after connecting the signal interface 100 to the line interface 210 of the load device 200, samples the load feedback signal output by the line interface 210 or transmits load control signals to the line interface 210. It is compatible with at least seven types of commonly used industrial signals: analog feedback signal input, pulse feedback signal input, level feedback signal input, switch feedback signal input, analog control signal output, pulse control signal output, and level control signal output. The transmission management circuit provided in this embodiment does not require separate circuits and interfaces matching the signal type. Its simple circuit structure not only reduces the circuit's footprint and cost but also avoids crosstalk problems caused by integration between different types of existing circuits.

[0025] Continue as Figure 1 As shown, after connecting the signal interface 100 to the line interface 210 of the load device 200, the processing principle of the transmission management circuit for various types of signals can be as follows: On one hand, when the transmission management circuit inputs an analog feedback signal, the processing module 500 controls the output conditioning circuit module 400 to shut down and controls the input conditioning circuit module 300 to input the signal. When the analog feedback signal output from the line interface 210 is connected to the signal interface 100, the input analog feedback signal passes through the input conditioning circuit module 300 and enters the processing module 500. The processing module 500 samples the analog feedback signal, thereby completing the input process of the analog feedback signal.

[0026] On the other hand, when the transmission management circuit outputs analog control signals, the processing module 500 controls the output conditioning circuit module 400 to start and controls the input conditioning circuit module 300 to input signals. The output conditioning circuit module 400 transmits the analog control signal to the line interface 210 through the signal interface 100; since the input conditioning circuit module 300 is also electrically connected to the signal interface 100, it also receives the analog control signal. The processing module 500 acquires the analog control signal in real time and adjusts the output conditioning circuit module 400 according to the sampling results of the analog control signal, thereby improving the stability of the analog control signal output by the output conditioning circuit module 400, thus completing the output process of the analog control signal.

[0027] On the other hand, when the transmission management circuit inputs a pulse feedback signal, the processing module 500 controls the output conditioning circuit module 400 to shut down and controls the input conditioning circuit module 300 to input the signal. When the pulse feedback signal output from the line interface 210 is connected to the signal interface 100, the input pulse feedback signal enters the processing module 500 through the input conditioning circuit module 300. The processing module 500 starts timing when it detects a pulse signal input and stops timing when no more pulse signals are input. It records the pulse width to complete one sampling of the pulse feedback signal. This sampling is repeated cyclically to complete the input process of the pulse feedback signal for the entire set period.

[0028] On the other hand, when the transmission management circuit outputs pulse control signals, the processing module 500 controls the output conditioning circuit module 400 to turn on and controls the input conditioning circuit module 300 to input signals. The output conditioning circuit module 400 transmits the pulse signal to the line interface 210 through the signal interface 100. At the same time, the processing module 500 samples the pulse signal input to the input conditioning circuit module 300. The processing module 500 adjusts the pulse signal output by the output conditioning circuit module 400 according to the sampling results until the pulse signal reaches the set pulse width. Then, the processing module 500 controls the output conditioning circuit module 400 to turn off, completing one pulse control signal output. This cycle is repeated to complete the pulse control signal output process for the entire set period.

[0029] On the other hand, when the transmission management circuit inputs a level feedback signal, the processing module 500 controls the output conditioning circuit module 400 to shut down and controls the input conditioning circuit module 300 to input the signal. When the level feedback signal output from the line interface 210 is connected to the signal interface 100, the input level feedback signal enters the processing module 500 through the input conditioning circuit module 300. The processing module 500 determines that the sampled signal reaches the set level amplitude value as a valid signal, and thus uses it as a valid input for the level feedback signal. The processing module 500 samples the level feedback signal, thereby completing the input process of the level feedback signal.

[0030] On the other hand, when the transmission management circuit outputs the level control signal, the processing module 500 controls the output conditioning circuit module 400 to start and controls the input conditioning circuit module 300 to input the signal. The output conditioning circuit module 400 transmits the level signal to the line interface 210 through the signal interface 100. At the same time, the processing module 500 samples the level signal input to the input conditioning circuit module 300. Based on the sampling results, the processing module 500 adjusts the level signal output by the output conditioning circuit module 400 in real time to meet the set level amplitude value, thereby completing the output process of the level control signal.

[0031] On the other hand, when the transmission management circuit inputs the switching feedback signal, the processing module 500 controls the output conditioning circuit module 400 to output a reference voltage and controls the input conditioning circuit module 300 to input the signal. The processing module 500 collects the voltage value input to the input conditioning circuit module 300. When the processing module 500 determines that the sampled voltage value is less than the reference voltage, it indicates that the load device 200 has completed the line switch conduction, and the switching feedback signal is determined to be a switching closed signal; or, when the processing module 500 determines that the sampled voltage value is equal to the reference voltage, it indicates that the load device 200 has completed the line switch deactivation, and the switching feedback signal is determined to be a switching open signal, thereby completing the input process of the switching feedback signal.

[0032] In some embodiments, the transmission management circuit provided in this disclosure can also perform line detection. When the transmission management circuit is applied to scenarios such as industrial control and fire safety, line fault detection can promptly resolve line problems, improving not only safety but also effectively enhancing the operational stability, fault self-diagnosis capability, and maintenance efficiency of the industrial control system, reducing production losses caused by equipment downtime. For example, after connecting the signal interface 100 to the line interface 210 of the load device 200, the transmission management circuit provided in this disclosure can detect the normal state, short-circuit state, or open-circuit state of the line under test between the signal interface 100 and the load device 200. That is, the processing module 500 provided in this disclosure is also used to control the output conditioning circuit module 400 to output a reference voltage. When the processing module 500 collects the actual voltage input to the conditioning circuit module 300, which is less than the reference voltage, it determines that the line under test between the signal interface 100 and the load device 200 is normal. When the line under test is normal, it acts as a voltage divider resistor, thus causing the actual voltage to be less than the reference voltage. Alternatively, if the actual voltage collected by the processing module 500 equals the reference voltage, the circuit under test is determined to be open. Alternatively, if the actual voltage collected by the processing module 500 is 0, the circuit under test is determined to be short.

[0033] For example, after connecting the signal interface 100 to the line interface 210 of the load device 200, the transmission management circuit provided in this embodiment can detect the switch status in the line under test between the signal interface 100 and the load device 200. That is, the processing module 500 provided in this embodiment is also used to control the output conditioning circuit module 400 to output a reference voltage. When the processing module 500 collects an actual voltage that is less than the reference voltage, it determines that the switch in the line under test is on. When the switch in the line under test is on, it acts as a voltage divider resistor, thus causing the actual voltage to be less than the reference voltage. Alternatively, when the processing module 500 collects an actual voltage that is equal to the reference voltage, it determines that the switch in the line under test is off.

[0034] refer to Figure 2 The diagram shown is a circuit diagram of a second type of multi-signal compatible transmission management circuit provided in this embodiment of the present disclosure. The output conditioning circuit module 400 provided in this embodiment includes: a first unidirectional path 410, the output terminal of which is electrically connected to the signal interface 100 and the processing module 500, and the first unidirectional path 410 outputs a reference voltage based on the control of the processing module 500; and a second unidirectional path 420, the output terminal of which is electrically connected to the signal interface 100 and the processing module 500, and the second unidirectional path 420 outputs a load control signal based on the control of the processing module 500.

[0035] In some embodiments, the first unidirectional path 410 provided in this disclosure includes: a first unidirectional conduction circuit 411, the output terminal of which is electrically connected to the signal interface 100; a first switch 412, the output terminal of which is electrically connected to the input terminal of the first unidirectional conduction circuit 411, and the control terminal of which is electrically connected to the processing module 500; and a signal power supply 413, the output terminal of which is electrically connected to the input terminal of the first switch 412, and the signal power supply 413 is used to output a reference voltage. In some embodiments, the second unidirectional path 420 provided in this disclosure includes: a second unidirectional conduction circuit 421, the output terminal of which is electrically connected to the signal interface 100; a second switch 422, the output terminal of which is electrically connected to the input terminal of the second unidirectional conduction circuit 421, and the control terminal of which is electrically connected to the processing module 500; and a power supply 423, the output terminal of which is electrically connected to the input terminal of the second switch 422, and the control terminal of which is electrically connected to the processing module 500, wherein the power supply 423 outputs a load control signal based on the control of the processing module 500.

[0036] The signal power supply 413 is used to output a reference voltage, which is then used by the transmission management circuit to implement the input process of the switching feedback signal, or to implement the switching status detection of the circuit under test. The power supply 423 is an adjustable power supply with a certain power, which, based on the control of the processing module 500, implements the output of different types of signals, such as analog signals, level signals, and pulse signals. The first switch 412 and the second switch 422 can be electronic switches, realizing the opening or closing of their respective unidirectional paths. The first unidirectional conduction circuit 411 and the second unidirectional conduction circuit 421 are unidirectional conduction circuit structures, thereby preventing mutual interference between lines during signal input and output. In some embodiments, at least one of the first unidirectional conduction circuit 411 and the second unidirectional conduction circuit 421 provided in this disclosure also integrates an overvoltage / overcurrent protection unit, thereby improving the reliability of the transmission management circuit.

[0037] In some embodiments, the input conditioning circuit module 300 provided in this disclosure may include a third unidirectional conduction circuit 310, the input terminal of which is electrically connected to the signal interface 100, and the output terminal of which is electrically connected to the processing module 500. The third unidirectional conduction circuit 310 also has a unidirectional conduction circuit structure to prevent mutual interference between lines during signal input and output. In some embodiments, the third unidirectional conduction circuit 310 provided in this disclosure also integrates an overvoltage / overcurrent protection unit, thereby improving the reliability of the transmission management circuit.

[0038] Continue as Figure 2As shown, after connecting the signal interface 100 to the line interface 210 of the load device 200, the processing principle of the transmission management circuit for various types of signals can be as follows: On one hand, when the transmission management circuit inputs an analog feedback signal, the processing module 500 controls both the first switch 412 and the second switch 422 to be turned off, while the third unidirectional conduction circuit 310 remains on to allow the signal to be input. When the analog feedback signal output from the line interface 210 is connected to the signal interface 100, the input analog feedback signal enters the processing module 500 through the third unidirectional conduction circuit 310. The processing module 500 samples the analog feedback signal, thereby completing the input process of the analog feedback signal.

[0039] On the other hand, when the transmission management circuit outputs analog control signals, the processing module 500 controls the first switch 412 to turn off and the second switch 422 to turn on, while the third unidirectional conduction circuit 310 remains on to receive the signal. The processing module 500 controls the power supply 423 to output analog control signals and transmits the analog control signals to the line interface 210 through the signal interface 100. Since the third unidirectional conduction circuit 310 is also electrically connected to the signal interface 100, it also receives the analog control signal. The processing module 500 acquires the analog control signal in real time and adjusts the power supply 423 according to the sampling results of the analog control signal to improve the stability of the analog control signal output by the power supply 423, thereby completing the output process of the analog control signal.

[0040] On the other hand, when the transmission management circuit inputs a pulse feedback signal, the processing module 500 controls both the first switch 412 and the second switch 422 to be turned off, while the third unidirectional conduction circuit 310 remains on to allow the signal to be received. When the signal interface 100 receives the pulse feedback signal output from the line interface 210, the input pulse feedback signal enters the processing module 500 through the third unidirectional conduction circuit 310. The processing module 500 starts timing when it detects a pulse signal input and stops timing when no more pulse signals are input, recording the pulse width to complete one sampling of the pulse feedback signal. This sampling is repeated cyclically to complete the input process of the pulse feedback signal for the entire set period.

[0041] On the other hand, when the transmission management circuit outputs a pulse control signal, the processing module 500 controls the first switch 412 to turn off and the second switch 422 to turn on, while the third unidirectional conduction circuit 310 remains on to receive the signal. The processing module 500 controls the power supply 423 to output a pulse signal and transmits the pulse signal to the line interface 210 through the signal interface 100. The processing module 500 simultaneously samples the pulse signal received by the third unidirectional conduction circuit 310. Based on the sampling results, the processing module 500 adjusts the pulse signal output by the power supply 423 until the pulse signal reaches the set pulse width. At this point, the processing module 500 controls the second switch 422 to turn off, completing one pulse control signal output. This cycle is repeated to complete the output process of the pulse control signal for the entire set period.

[0042] On the other hand, when the transmission management circuit inputs a level feedback signal, the processing module 500 controls both the first switch 412 and the second switch 422 to be turned off, while the third unidirectional conduction circuit 310 remains on to allow the signal to be input. When the signal interface 100 receives the level feedback signal output from the line interface 210, the input level feedback signal enters the processing module 500 through the third unidirectional conduction circuit 310. The processing module 500 determines that the sampled signal is valid when it reaches the set level amplitude value, thus using it as a valid input for the level feedback signal. The processing module 500 samples the level feedback signal, thereby completing the input process of the level feedback signal.

[0043] On the other hand, when the transmission management circuit outputs the level control signal, the processing module 500 controls the first switch 412 to turn off and the second switch 422 to turn on, while the third unidirectional conduction circuit 310 remains on to receive the signal. The processing module 500 controls the power supply 423 to output a level signal and transmits the level signal to the line interface 210 through the signal interface 100. At the same time, the processing module 500 samples the level signal received by the third unidirectional conduction circuit 310. Based on the sampling results, the processing module 500 adjusts the level signal output by the power supply 423 in real time to meet the set level amplitude value, thereby completing the output process of the level control signal.

[0044] On the other hand, when the transmission management circuit inputs the switching feedback signal, the processing module 500 controls the first switch 412 to turn on and the second switch 422 to turn off, while the third unidirectional conduction circuit 310 remains on to receive the signal. The first switch 412 turns on, outputting the reference voltage from the signal power supply 413. The processing module 500 then collects the received voltage value through the third unidirectional conduction circuit 310. When the processing module 500 determines that the sampled voltage value is less than the reference voltage, it indicates that the load device 200 has completed the line switch conduction, and the switching feedback signal is determined to be a switching closed signal; or, when the processing module 500 determines that the sampled voltage value is equal to the reference voltage, it indicates that the load device 200 has completed the line switch deactivation, and the switching feedback signal is determined to be a switching open signal, thus completing the input process of the switching feedback signal.

[0045] Continue as Figure 2 As shown, in the process of line detection, for example, after connecting the signal interface 100 to the line interface 210 of the load device 200, the transmission management circuit provided in this embodiment can detect the normal state, short circuit state, or open circuit state of the line under test between the signal interface 100 and the load device 200. The processing module 500 controls the first switch 412 to be turned on and controls the second switch 422 to be turned off. The first unidirectional conduction circuit 411 transmits the reference voltage output by the signal power supply 413 to the signal interface 100. When the processing module 500 collects the actual voltage connected to the third unidirectional conduction circuit 310, which is less than the reference voltage, it determines that the line under test between the signal interface 100 and the load device 200 is normal; or, when the actual voltage collected by the processing module 500 is equal to the reference voltage, it determines that the line under test is open circuit; or, when the actual voltage collected by the processing module 500 is 0, it determines that the line under test is short circuit.

[0046] For example, after connecting the signal interface 100 to the line interface 210 of the load device 200, the transmission management circuit provided in this embodiment can detect the switch status in the line under test between the signal interface 100 and the load device 200. At this time, the processing module 500 controls the first switch 412 to be turned on and controls the second switch 422 to be turned off. The first unidirectional conduction circuit 411 transmits the reference voltage output by the signal power supply 413 to the signal interface 100. When the processing module 500 collects the actual voltage connected to the third unidirectional conduction circuit 310, which is less than the reference voltage, it determines that the switch in the line under test is turned on; or, when the processing module 500 collects the actual voltage, which is equal to the reference voltage, it determines that the switch in the line under test is turned off.

[0047] refer to Figure 3The diagram shown is a circuit diagram of a third type of multi-signal compatible transmission management circuit provided in this embodiment of the present disclosure. The transmission management circuit further includes a filtering module 710, whose input terminal is electrically connected to the signal interface 100, and whose output terminal is electrically connected to the input terminal of the input conditioning circuit module 300. For example, the output terminal of the filtering module 710 is electrically connected to the input terminal of the third unidirectional conduction circuit 310, filtering the signal at the signal interface 100 before transmitting it to the third unidirectional conduction circuit 310, thereby improving the sampling accuracy of the signal by the processing module 500. In some embodiments, the transmission management circuit provided in this embodiment of the present disclosure may further include an EMC (Electromagnetic Compatibility) module 720, which is electrically connected to the signal interface, thereby improving the ability to suppress electromagnetic interference at the signal interface 100 and improving the performance of the transmission management circuit.

[0048] In some embodiments, the transmission management circuit provided in this disclosure may also include, but is not limited to, an integrated optical fiber structure, thereby realizing long-distance signal transmission control functions. For example, in engineering control scenarios, the signal initiator and the controlled device are not located in the same equipment room, and the distance can vary from hundreds to thousands of meters. Therefore, a transmission management circuit integrating an optical fiber structure can realize the conversion of electrical signals to optical signals, achieving long-distance signal transmission. (Reference) Figure 4 The diagram shown is a circuit diagram of a fourth type of multi-signal compatible transmission management circuit provided in this embodiment of the present disclosure. The transmission management circuit provided in this embodiment further includes: a main optical fiber 610 and a backup optical fiber 620; an optical fiber module 630, which is electrically connected to the main optical fiber 610, the backup optical fiber 620, and the processing module 500. The processing module 500 is further configured to, when determining that the main optical fiber 610 is normal, transmit the target electrical signal to the optical fiber module 630, and the optical fiber module 630 converts the target electrical signal into a target optical signal before transmitting it to the main optical fiber 610; or, when determining that the main optical fiber 610 is abnormal and the backup optical fiber 620 is normal, the processing module 500 transmits the target electrical signal to the optical fiber module 630, and the optical fiber module 630 converts the target electrical signal into a target optical signal before transmitting it to the backup optical fiber 620. The transmission management circuit provided in this embodiment of the present disclosure adopts an optical fiber redundancy design, which improves the service life and reliability of the transmission management circuit while achieving long-distance signal transmission.

[0049] refer to Figure 5The diagram shown is a circuit diagram of a fifth type of multi-signal compatible transmission management circuit provided in this embodiment of the present disclosure. The fiber optic module 630 provided in this embodiment includes: a main fiber optic conversion unit 631, a first end of which is connected to a main fiber optic cable 610, and a second end of which is electrically connected to a processing module 500. The main fiber optic conversion unit 631 is used to convert the main state detection optical signal of the main fiber optic cable 610 into a main state detection electrical signal. When the processing module 500 determines that the main fiber optic cable 610 is normal based on the main state detection electrical signal, it transmits a target electrical signal to the main fiber optic conversion unit 631. The main fiber optic conversion unit 631 converts the target electrical signal into a target optical signal and transmits it to the main fiber optic cable 610. When the main fiber optic cable 610 is normal, the processing module 500 directly controls the backup fiber optic conversion unit 632 to shut down via the fiber optic control unit 633. A backup fiber optic conversion unit 632 is provided. The first end of the backup fiber optic conversion unit 632 is connected to a backup fiber optic cable 620, and the second end is electrically connected to the processing module 500. The backup fiber optic conversion unit 632 converts the backup status detection optical signal of the backup fiber optic cable 620 into a backup status detection electrical signal. When the processing module 500 determines that the main fiber optic cable 610 is abnormal based on the main status detection electrical signal and that the backup fiber optic cable 620 is normal based on the backup status detection electrical signal, it transmits the target electrical signal to the backup fiber optic conversion unit 632. The backup fiber optic conversion unit 632 converts the target electrical signal into a target optical signal and transmits it to the backup fiber optic cable 620. A fiber optic control unit 633 is electrically connected to both the main fiber optic conversion unit 631 and the backup fiber optic conversion unit 632. The fiber optic control unit 633 controls the main fiber optic conversion unit 631 to turn on when the main fiber optic cable 610 is normal; or, the fiber optic control unit 633 controls the backup fiber optic conversion unit 632 to turn on when the main fiber optic cable 610 is abnormal and the backup fiber optic cable 620 is normal.

[0050] In summary, this disclosure provides a transmission management circuit compatible with multiple signal types. After connecting the signal interface 100 to the line interface 210 of the load device 200, the transmission management circuit samples the load feedback signal output from the line interface 210 or transmits load control signals to the line interface 210. It is compatible with at least seven types of commonly used industrial signals: analog feedback signal input, pulse feedback signal input, level feedback signal input, switch feedback signal input, analog control signal output, pulse control signal output, and level control signal output. The transmission management circuit has a simple circuit structure, which not only reduces the circuit's footprint and cost but also avoids the crosstalk problem caused by the integration of different types of circuits.

[0051] In the description of the embodiments of this disclosure, it should 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 other terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of embodiments of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0053] In the embodiments disclosed herein, unless otherwise expressly specified and limited, terms such as "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0054] In the embodiments of this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0055] In the embodiments disclosed herein, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0056] Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A transmission management circuit compatible with multiple signal types, characterized in that, The transmission management circuit includes: A signal interface is provided, which is connected to the line interface of a load device. The signal interface is used to receive the load feedback signal output by the line interface; or, the signal interface is used to output a load control signal to the line interface. The load feedback signal includes any one of analog feedback signal, pulse feedback signal, level feedback signal, and switch feedback signal. The load control signal includes any one of analog control signal, pulse control signal, and level control signal. An input conditioning circuit module is provided, the input terminal of which is electrically connected to the signal interface. The input conditioning circuit module is used to receive the load feedback signal or the load control signal. When the load feedback signal includes the switch feedback signal, the input conditioning circuit module is also connected to a reference voltage. An output conditioning circuit module, the output terminal of which is electrically connected to the signal interface, is used to output the load control signal or the reference voltage; The processing module is electrically connected to both the input conditioning circuit module and the output conditioning circuit module. The processing module samples the load feedback signal connected to the input conditioning circuit module. When the load feedback signal includes the switching feedback signal, the processing module simultaneously controls the output conditioning circuit module to output the reference voltage. Alternatively, the processing module controls the output conditioning circuit module to output the load control signal and samples the load control signal connected to the input conditioning circuit module, adjusting the load control signal based on the sampling results.

2. The transmission management circuit compatible with multiple signal types according to claim 1, characterized in that, The processing module is also used to control the output conditioning circuit module to output the reference voltage. When the actual voltage connected to the input conditioning circuit module is less than the reference voltage, the processing module determines that the line under test between the signal interface and the load device is normal. Alternatively, if the actual voltage collected by the processing module is equal to the reference voltage, the circuit under test is determined to be open. Alternatively, if the actual voltage collected by the processing module is 0, the circuit under test is determined to be short-circuited. Alternatively, the processing module is further configured to control the output conditioning circuit module to output the reference voltage, and when the processing module acquires that the actual voltage is less than the reference voltage, determine that the switch in the circuit under test is turned on; Alternatively, when the actual voltage collected by the processing module is equal to the reference voltage, it is determined that the switch in the circuit under test is open.

3. The transmission management circuit compatible with multiple signal types according to claim 1, characterized in that, The output conditioning circuit module includes: The first unidirectional path has its output terminal electrically connected to the signal interface and to the processing module. The first unidirectional path outputs the reference voltage based on the control of the processing module. The second unidirectional path has its output terminal electrically connected to the signal interface and to the processing module. The second unidirectional path outputs the load control signal based on the control of the processing module.

4. The transmission management circuit compatible with multiple signal types according to claim 3, characterized in that, The first unidirectional path includes: A first unidirectional conduction circuit, the output terminal of which is electrically connected to the signal interface; The first switch has its output terminal electrically connected to the input terminal of the first unidirectional conduction circuit, and its control terminal is electrically connected to the processing module. A signal power supply, the output terminal of which is electrically connected to the input terminal of the first switch, is used to output the reference voltage; And / or, the second unidirectional pathway includes: A second unidirectional conduction circuit, the output terminal of which is electrically connected to the signal interface; The second switch has its output terminal electrically connected to the input terminal of the second unidirectional conduction circuit, and its control terminal electrically connected to the processing module. A power supply, the output terminal of which is electrically connected to the input terminal of the second switch, and the control terminal of which is electrically connected to the processing module, the power supply outputs the load control signal based on the control of the processing module.

5. The transmission management circuit compatible with multiple signal types according to claim 4, characterized in that, At least one of the first unidirectional conduction circuit and the second unidirectional conduction circuit also integrates an overvoltage / overcurrent protection unit.

6. The transmission management circuit compatible with multiple signal types according to claim 1, characterized in that, The input conditioning circuit module includes: A third unidirectional conduction circuit, wherein the input terminal of the third unidirectional conduction circuit is electrically connected to the signal interface, and the output terminal of the third unidirectional conduction circuit is electrically connected to the processing module.

7. The transmission management circuit compatible with multiple signal types according to claim 6, characterized in that, The third unidirectional conduction circuit also integrates an overvoltage / overcurrent protection unit.

8. The transmission management circuit compatible with multiple signal types according to claim 1, characterized in that, The transmission management circuit also includes: Primary fiber and backup fiber; The fiber optic module is electrically connected to the main fiber, the backup fiber, and the processing module. The processing module is further configured to transmit a target electrical signal to the fiber optic module when the main fiber is functioning normally, and the fiber optic module converts the target electrical signal into a target optical signal before transmitting it to the main fiber; or, the processing module is configured to transmit the target electrical signal to the fiber optic module when the main fiber is functioning abnormally and the backup fiber is functioning normally, and the fiber optic module converts the target electrical signal into a target optical signal before transmitting it to the backup fiber.

9. The transmission management circuit compatible with multiple signal types according to claim 8, characterized in that, The optical fiber module includes: A main fiber conversion unit is provided, with its first end connected to the main fiber and its second end electrically connected to the processing module. The main fiber conversion unit is used to convert the main state detection optical signal of the main fiber into a main state detection electrical signal. When the processing module determines that the main fiber is normal based on the main state detection electrical signal, it transmits the target electrical signal to the main fiber conversion unit. The main fiber conversion unit converts the target electrical signal into a target optical signal and then transmits it to the main fiber. A backup fiber conversion unit is provided, with its first end connected to the backup fiber and its second end electrically connected to the processing module. The backup fiber conversion unit is used to convert the backup status detection optical signal of the backup fiber into a backup status detection electrical signal. When the processing module determines that the main fiber is abnormal based on the main status detection electrical signal and that the backup fiber is normal based on the backup status detection electrical signal, it transmits the target electrical signal to the backup fiber conversion unit. The backup fiber conversion unit converts the target electrical signal into a target optical signal and then transmits it to the backup fiber. The fiber optic control unit is electrically connected to both the main fiber conversion unit and the backup fiber conversion unit. The fiber optic control unit is used to control the main fiber conversion unit to turn on when the main fiber is normal; or, the fiber optic control unit is used to control the backup fiber conversion unit to turn on when the main fiber is abnormal and the backup fiber is normal.

10. The transmission management circuit compatible with multiple signal types according to claim 1, characterized in that, The transmission management circuit also includes: A filtering module, wherein the input terminal of the filtering module is electrically connected to the signal interface, and the output terminal of the filtering module is electrically connected to the input terminal of the input conditioning circuit module; And / or, the transmission management circuit further includes: The EMC module is electrically connected to the signal interface.

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