CN112148051A

CN112148051A - Signal conversion circuit

Info

Publication number: CN112148051A
Application number: CN201910575215.9A
Authority: CN
Inventors: 洪俭; 李振华; 朱瑶琦; 白晓伟
Original assignee: York Guangzhou Air Conditioning and Refrigeration Co Ltd; Johnson Controls Technology Co
Current assignee: York Guangzhou Air Conditioning and Refrigeration Co Ltd; Johnson Controls Technology Co
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-12-29

Abstract

The present invention provides a signal conversion circuit that can provide conversion of signals between these different manufacturers' devices without the need to modify the original hardware and software design. Specifically, the invention adopts some common relays and/or delay relays to build a signal conversion circuit for converting a level signal (a first standard signal) into a pulse signal (a second standard signal) and a signal conversion circuit for converting the pulse signal (the second standard signal) into the level signal (the first standard signal). The signal conversion circuit realizes the conversion between the level signal and the pulse signal through the combination of the relay, has simple circuit design, easy realization, high reliability and high circuit response speed, does not relate to software control, saves the development work of software, avoids the risk caused by software loopholes, and is particularly convenient for the realization and the application on site.

Description

Signal conversion circuit

Technical Field

The present invention relates to circuits, and more particularly to a circuit for converting signals of two different standards.

Background

The operation of the electrical device is generally controlled by control signals. Typically, control circuits provided by different manufacturers generate control signals of different formats. For example, a control signal of a control circuit provided by one manufacturer is a pulse signal, wherein one pulse is used to start an operation of an electrical device and another pulse is used to stop the operation of the electrical device, and the running or operating state of the electrical device is maintained between the two pulses. However, another manufacturer provides control signals for control circuits that are level signals, wherein a leading edge transition of the level signal is used to initiate an operation of the electrical device and a trailing edge transition of the level signal is used to stop the operation of the electrical device, and the operational or operational state of the electrical device is maintained between the two transitions.

The inventor has long observed that when an electrical device uses a manufacturer's interface circuit to control the electrical device, it is possible to use a standard control signal (such as a pulse signal) to control the operation of the electrical device. In some cases, in order to expand the functions of the electrical equipment, the interface circuit of the manufacturer used by the electrical equipment is connected to an interface circuit provided by another electrical equipment manufacturer, but a control signal (such as a level signal) of another standard may be used by the other electrical equipment manufacturer to control the operation of the electrical equipment. In this case, a conversion circuit is required between the two manufacturers' devices (e.g., including the interface circuit). Since the hardware and software design of these manufacturers' devices is already fixed, it is not easily altered. And manufacturers of both parties are reluctant to alter their own hardware or software designs for business or cost reasons.

For the existing control signal transformation method, some traditional methods are implemented by modifying software logic of equipment, and modifying the software logic generally brings more verification and debugging work, and if the software logic is improperly modified, some software bugs are caused, so that certain risks are brought.

Disclosure of Invention

To solve the above problems, the present invention provides a signal conversion circuit that can provide conversion of signals between devices of these different manufacturers without changing the original hardware and software design. Specifically, the invention adopts some common relays and/or delay relays to build a signal conversion circuit for converting a level signal (a first standard signal) into a pulse signal (a second standard signal) and a signal conversion circuit for converting the pulse signal (the second standard signal) into the level signal (the first standard signal). The signal conversion circuit realizes the conversion between the level signal and the pulse signal through the combination of the relay, has simple circuit design, easy realization, high reliability and high circuit response speed, does not relate to software control, saves the development work of software, avoids the risk caused by software loopholes, and is particularly convenient for the realization and the application on site.

When designing a signal conversion circuit, if a logic gate circuit is used, a printed circuit board needs to be additionally developed because the logic gate circuit belongs to an electronic component and generally needs to be mounted on the printed circuit board. Furthermore, software logic is typically designed to cooperate with the logic gates, which results in a lot of verification and debugging effort. In addition, the logic gate circuit is generally only suitable for weak current environments, and therefore, the logic gate circuit has great limitation on field implementation and application of control signal conversion.

In order to solve the problems, the invention uses the relay to design the signal conversion circuit, saves the development work of a printed circuit board and software, and provides enough flexibility and environmental applicability for field realization and application. In particular, the relay is an independently packaged electrical component that can be directly mounted without the development of a printed circuit board. Moreover, the relay is used for realizing signal conversion, and the design of a pure hardware circuit is realized, so that the software design is not needed. In addition, the coil (actuating means) of the relay is completely electrically isolated from the contacts (switches) so that the coil and the contacts can take different forms of power supply, and the coil and the contacts are selectable in various forms of voltage (e.g., direct current or alternating current, weak current or strong current). Therefore, the invention can convert the input signal suitable for one power supply form into the output signal suitable for another power supply form by designing the signal conversion circuit by using the proper relay, thereby realizing the signal conversion in any power supply form, and providing enough flexibility and environmental suitability for the realization and application in the field.

According to a first aspect of the present invention, there is provided a signal conversion circuit for converting a signal of a first standard into a signal of a second standard. The signal conversion circuit comprises an input path, a control circuit and an output path. The input path is used for receiving the first standard signal, the output path is used for outputting the second standard signal, and each of the input path, the control circuit and the output path comprises at least one excitation device; each of the input path, the control circuit and the output path is controllably connected between two ends of a power supply.

According to a second aspect of the invention, a control system is provided. The control system includes: the device comprises a controller, a signal conversion circuit, an electrical equipment interface and electrical equipment. The controller is connected with the signal conversion circuit, so that the first standard signal generated by the controller is input to the signal conversion circuit. The signal conversion circuit converts the first standard signal into a second standard signal, and the signal conversion circuit is connected with the electrical equipment interface and transmits the second standard signal to the electrical equipment interface. The electrical equipment is connected with the electrical equipment interface and receives the second standard signal from the electrical equipment interface, the second standard signal is used for controlling the operation of the electrical equipment, and the signal conversion circuit is the signal conversion circuit according to the first aspect of the invention.

According to a third aspect of the present invention, there is provided a signal conversion circuit for converting a signal of a second system into a signal of a first system. The signal conversion circuit includes an input circuit, a control circuit, and an output path. The input circuit is used for receiving the second standard signal, and the output path is used for outputting the first standard signal. Each of the control circuit and the output path includes at least one excitation device. The control circuit and the input circuit are controllably connected in series between two terminals of a power supply, and the output path is controllably connected between two terminals of the power supply.

According to a fourth aspect of the present invention, a control system is provided. The control system comprises a controller, a signal conversion circuit, an electrical equipment interface and electrical equipment. The controller is connected with the signal conversion circuit, so that a second standard signal generated by the controller is input to the signal conversion circuit. And the signal conversion circuit converts the second standard signal into a first standard signal. The signal conversion circuit is connected with the electrical equipment interface and transmits the first standard signal to the electrical equipment interface. The electrical equipment is connected with the electrical equipment interface and receives the first standard signal from the electrical equipment interface, and the first standard signal is used for operating the electrical equipment.

According to a fifth aspect of the present invention, there is provided a control system characterized in that the control system comprises a controller, a first signal conversion circuit, a second signal conversion circuit, an electrical equipment interface, an electrical equipment, and a control panel. Wherein the controller is connected to the first signal conversion circuit and the second signal conversion circuit. The first signal conversion circuit and the second signal conversion circuit are both connected to the electrical equipment interface. The electrical equipment interface is connected to the electrical equipment. The controller generates a first standard signal and sends the first standard signal to the first signal conversion circuit, and the first signal conversion circuit converts the first standard signal into a second standard signal and sends the second standard signal to the electrical equipment interface. And the electrical equipment receives the second standard signal from the electrical equipment interface so as to operate according to the second standard signal. The control panel is connected to the electrical equipment interface to control the electrical equipment interface to generate a second standard signal, the second standard signal generated by the electrical equipment interface is used for controlling the operation of the electrical equipment, the second signal conversion circuit receives the second standard signal generated by the electrical equipment interface and converts the received second standard signal into a first standard signal, and the controller receives the first standard signal converted by the second signal conversion circuit to monitor the operation of the electrical equipment. Wherein the first signal conversion circuit is a signal conversion circuit according to the first aspect of the present invention, and the second signal conversion circuit is a signal conversion circuit according to the third aspect of the present invention.

According to a sixth aspect of the present invention, a control system is provided. The control system comprises a controller, a first signal conversion circuit, a second signal conversion circuit, an electrical equipment interface, electrical equipment and a control panel. Wherein the controller is connected to the first signal conversion circuit and the second signal conversion circuit, and both the first signal conversion circuit and the second signal conversion circuit are connected to the electrical equipment interface. The electrical equipment interface is connected to the electrical equipment. The controller generates a second standard signal and sends the second standard signal to the second signal conversion circuit, and the second signal conversion circuit converts the second standard signal into a first standard signal and sends the first standard signal to the electrical equipment interface. And the electrical equipment receives the first standard signal from the electrical equipment interface so as to operate according to the first standard signal. The control panel is connected to the electrical equipment interface to control the electrical equipment interface to generate a first standard signal, and the first standard signal generated by the electrical equipment interface is used for controlling the operation of the electrical equipment. And the first signal conversion circuit receives the first standard signal generated by the electrical equipment interface and converts the received first standard signal into a second standard signal. The controller receives the first standard signal converted by the first signal conversion circuit to monitor the operation of the electrical equipment. Wherein the first signal conversion circuit is a signal conversion circuit according to the first aspect of the invention and the second signal conversion circuit is a signal conversion circuit according to the second aspect of the invention as claimed.

Drawings

FIGS. 1A and 1B illustrate block diagram configurations of two embodiments of a control system of the present invention, respectively;

fig. 2A and 2B show block configurations of the signal conversion circuit 103 in fig. 1A and the signal conversion circuit 113 in fig. 1B, respectively;

3A-3D show details of circuit diagrams of two embodiments of the input path in FIG. 2A and the input path in FIG. 2B, respectively;

fig. 4A to 4G respectively show a specific structure of a relay used in the signal conversion circuit 103 in fig. 1A;

fig. 5A to 5C respectively show a specific structure of a relay used in the signal conversion circuit 113 in fig. 1B;

fig. 6A and 6B show details of circuit diagrams of the signal conversion circuit 103 in fig. 2A and the signal conversion circuit 113 in fig. 2B;

fig. 7A and 7B show timing waveform diagrams of the actions of the respective relays in the signal conversion circuit 103 in fig. 6A and the signal conversion circuit 113 in fig. 6B, respectively;

FIG. 8 illustrates a system for bi-directional communication between the controller 104 and the appliance device interface 102, wherein the controller 104 sends and receives level signals;

fig. 9 shows a system for two-way communication between the controller 104 and the appliance device interface 102, wherein the controller 104 sends and receives pulsed signals; and

FIG. 10 illustrates a block diagram configuration of one embodiment of the controller 104 of FIGS. 1A-1B and 8-9.

Detailed Description

Various embodiments of the present invention will now be described with reference to the accompanying drawings, which form a part hereof. It should be understood that wherever possible, the same or similar reference numbers used in the present application refer to the same or like parts.

Fig. 1A and 1B respectively show block diagrams of two embodiments of a control system in the present invention, wherein the control system 100 in fig. 1A includes a signal conversion circuit 103, and the signal conversion circuit 103 is configured to convert a level signal (a signal of a first system) into a pulse signal (a signal of a second system); whereas the control system 110 in fig. 1B includes a signal conversion circuit 113, the signal conversion circuit 113 is configured to convert the pulse signal (second system signal) into a level signal (first system signal).

As shown in fig. 1A, the control system 100 includes a controller 104 (see fig. 10 for a specific circuit configuration), a signal conversion circuit 103 (see fig. 6 for a specific circuit configuration), an electrical device interface 102, and an electrical device 101. In the control system 100, the controller 104 can control the operation of the electric device 101. Specifically, the controller 104 is connected to the signal conversion circuit 103 via a connection line 106. The controller 104 generates a level signal (first system signal) and sends the level signal to the signal conversion circuit 103 through the connection line 106. The signal conversion circuit 103 converts the received level signal into a pulse signal (second system signal). The signal conversion circuit 103 is connected to the electrical equipment interface 102 via a connection line 107. After converting the received level signal into a pulse signal, the signal conversion circuit 103 outputs the converted pulse signal to the electrical appliance interface 102 through the connection line 107. The electric appliance 101 is connected to the electric appliance interface 102 and receives the converted pulse signal from the signal conversion circuit 103 from the electric appliance interface 102 to perform an operation such as an operation of turning on or off a washing program according to the received pulse signal.

In addition, optionally, the control system 100 further comprises a control panel 105, the control panel 105 being connected to the electrical device interface 102 and controlling the electrical device interface 102 to generate a pulse signal to control the operation of the electrical device 101. In a specific embodiment, the control panel 105 may be provided with a plurality of operation keys (not shown), and when a certain operation key on the control panel 105 is pressed, the circuit logic on the control panel 105 controls the electrical device interface 102 to generate a pulse signal. The electric device 101 receives the generated pulse signal from the electric device interface 102 to operate according to the generated pulse signal.

As shown in fig. 1B, the control system 110 includes a controller 104 (see fig. 10 for a specific configuration), a signal conversion circuit 113 (see fig. 6B for a specific circuit configuration), an electrical device interface 102, and an electrical device 101. In this control system 110, the controller 104 can control the operation of the electric device 101. Specifically, the controller 104 is connected to the signal conversion circuit 113 through a connection line 116. The controller 104 generates a pulse signal (second system signal) and sends the pulse signal to the signal conversion circuit 113 through the connection line 116. The signal conversion circuit 113 is connected to the electrical device interface 102 via a connection line 117. Upon receiving the pulse signal from the controller 104, the signal conversion circuit 113 converts the pulse signal into a level signal (first system signal), and outputs the converted level signal to the electrical equipment interface 102 through the connection line 117. The electric appliance 101 is connected to the electric appliance interface 102 and receives the converted level signal from the signal conversion circuit 113 from the electric appliance interface 102 to perform an operation such as an operation of turning on or off the washing program according to the received level signal.

In addition, optionally, the control system 110 further comprises a control panel 105, the control panel 105 being connected to the electrical device interface 102 and controlling the electrical device interface 102 to generate a level signal to control the operation of the electrical device 101. In a specific embodiment, the control panel 105 may be provided with a plurality of operation keys (not shown), and when a certain operation key on the control panel 105 is pressed, the circuit logic on the control panel 105 controls the electrical device interface 102 to generate a level signal. The electric device 101 receives the generated level signal from the electric device interface 102 to operate according to the generated level signal.

In one specific embodiment, the appliance 101 shown in fig. 1A and 1B is a soot cleaner, and the operation of the appliance 101 is, for example, the opening or closing of a cleaning process.

In a particular embodiment, controller 104 shown in fig. 1A and 1B can remotely control the operation of appliance 101. And when the remote control of the electric appliance 101 is out of order, the user can manually operate the control panel 105 to control the operation of the electric appliance 101.

It should be noted that in fig. 1A and 1B, the controller 104, the electric device 101, and the electric device interface 102 each have its own software environment and hardware environment. That is, the control signal of the controller 104 and the control signal of the electric appliance 101 are incompatible. Of course, controller 104 may be reprogrammed or its hardware environment changed to generate the same control signals as appliance 101, but this may cause other parts of controller 104 to be modified, which may cause controller 104 to become unstable. Of course, we can also change the software or hardware of the electrical device 101, but such changes also cause instability problems. In the present application, the signal conversion circuit 103 or the signal conversion circuit 113 is arranged to convert the mode of the control signal generated by the controller 104 into the mode of the control signal used by the electrical equipment 101, so that software and hardware in the working environment where the modes of the control signals of both sides are located do not need to be changed.

When designing the signal conversion circuit, of course, we can use a logic gate circuit, but the signal conversion circuit designed by the logic gate circuit can only be used in a scenario where the control signals of the controller 104 and the electrical device 101 are signals in a weak current environment, and has a great limitation. Further, since the logic gate circuit is an electronic component and generally needs to be mounted on a printed circuit board, the printed circuit board needs to be developed separately. It may also be necessary to design software logic to fit the logic gates, which may lead to more verification and debugging efforts. In the present application, however, the

signal conversion circuits

103 and 113 are designed by using relays and circuits thereof (see fig. 4A to 4G, 5A to 5C, and 6A to 6B in detail), so that development work of printed circuit boards and development work of software can be omitted, and the controller 104 and the electric device 101 can use control signals in any form of power supply, thereby providing sufficient flexibility and environmental suitability for realizing conversion of the control signals of the controller 104 and the electric device 101.

In the embodiment shown in fig. 1A and 1B, the

signal conversion circuits

103 and 113 are composed of pure hardware circuits including several relays and their circuits (see fig. 6A and 6B for details). Therefore, the

signal conversion circuits

103 and 113 do not involve software, and development work of software is omitted. The relays (see fig. 4A-4G and 5A-5C for details) in the

signal conversion circuits

103 and 113 are independently packaged electrical components that can be independently mounted, thus eliminating the need for development work on printed circuit boards. In some embodiments, the relays in the

signal conversion circuits

103 and 113 are installed into one of the control cabinet in which the controller 104 is located and the control cabinet in which the appliance interface 102 is located without changing the original software and hardware of the controller 104 and the appliance interface 102. In some embodiments, the relays in

signal conversion circuits

103 and 113 may be installed into a simple control box (which may only include a housing for mounting the relays, without involving a printed circuit board) that is then installed into a control cabinet in which controller 104 resides or into a control cabinet in which electrical device interface 102 resides. Also in some embodiments, the control box is located outside of the control cabinet where the controller 104 and the appliance interface 102 are located and is connected to the controller 104 and the appliance interface 102 by electrical connection lines. Such mounting includes screw mounting, rail mounting, and the like.

Also in fig. 1A and 1B, since the

signal conversion circuits

103 and 113 are designed using relays and circuits thereof (see fig. 4A to 4G, 5A to 5C, and 6A to 6B in detail), the control signals of the controller 104 and the electric appliance 101 are adapted to various power forms such as direct current or alternating current, weak current or strong current, and the like. Specifically, the coil (exciting device) and the contact (switch) of the relay have various voltages which can be selected, direct current or alternating current, weak current or strong current. Also, the coil of the relay is completely electrically isolated from the contacts, so that the coil and contacts may take different forms of power supply. For example, when the input signal needs to adopt weak current, a relay of a weak current coil needs to be selected, and the controlled equipment signal needs strong current, a relay contact of an output end needs to be connected into the strong current to obtain strong current signal output. That is, the

signal conversion circuits

103 and 113 can convert signals in either power form, thereby providing sufficient flexibility and environmental suitability for implementing conversion of control signals of the controller 104 and the electric appliance 101.

Fig. 2A and 2B show block configurations of the signal conversion circuit 103 in fig. 1A and the signal conversion circuit 113 in fig. 1B, respectively.

As shown in fig. 2A, the signal conversion circuit 103 includes an input path 201, a control circuit 202, and an output path 203, and the input path 201, the control circuit 202, and the output path 203 are connected in parallel between both ends of the power supply. In some industrial applications, the supply voltage of a power station is used as a power source, for example 220V in china and possibly 110V in other countries. In some embodiments, the two ends of the power supply are live and neutral. The input path 201 receives a level signal (first system signal) via the connection line 106. The input path 201 is turned on in response to a high level of the level signal, and the input path 201 is turned off in response to a low level of the level signal. It will be appreciated by those skilled in the art that, inspired by the present embodiment, input path 201 may be switched on in response to a low level of the level signal and input path 201 may be switched off in response to a high level of the level signal. The control circuit 202 generates a series of control signals in response to the input path 201 being connected and disconnected. The output path 203 generates a pulse signal (second system signal) in response to a series of control signals generated by the control circuit 202. Each of the input path 201, control circuit 202 and output path 203 includes one or more actuation devices, as shown in detail in fig. 6A. Furthermore, the control circuit 202 further comprises at least one actuation delay device, as shown in detail in FIG. 6A. In one embodiment, the excitation means and the excitation delay means are coils.

As shown in fig. 2B, signal conversion circuit 113 includes an input circuit 211, a control circuit 212, and an output path 213. The input circuit 211 and the control circuit 212 are controllably connected in series across the power supply, and the output path 213 is controllably connected across the power supply. In some industrial applications, the supply voltage of a power station is used as a power source, for example 220V in china and possibly 110V in other countries. In some embodiments, the two ends of the power supply are live and neutral. The input circuit 211 receives a pulse signal (second system signal) via the connection line 116. The input circuit 211 is turned on in response to a high level of the pulse signal, and the input circuit 211 is turned off in response to a low level of the pulse signal. It should be understood by those skilled in the art that, by the inspiration of the present embodiment, the input circuit 211 may be turned on in response to a low level of the pulse signal and the input circuit 211 may be turned off in response to a high level of the pulse signal. The control circuit 212 generates a series of control signals in response to the input circuit 211 being turned on and off. The output path 213 generates a level signal (first system signal) in response to a series of control signals generated by the control circuit 212. Control circuit 212 and output path 213 each include one or more actuation devices, as shown in greater detail in FIG. 6B. In one embodiment, the excitation means is a coil.

Fig. 3A-3D show details of the circuit diagrams of input path 201 in fig. 2A and input circuit 211 in fig. 2B, respectively. Specifically, fig. 3A and 3B illustrate one embodiment of a signal input switching circuit in input path 201 in fig. 2A and input circuit 211 in fig. 2B, respectively. Fig. 3C and 3D show another embodiment of the signal input switching circuit in the input path 201 in fig. 2A and the input circuit 211 in fig. 2B, respectively.

As shown in fig. 3A (in conjunction with fig. 6A), the input path 201 of the signal conversion circuit 103 includes the signal input switch circuit 304 and the excitation device KA10 (the excitation device KA10 is included in the first relay KA1, see fig. 4A). The signal input switching circuit 304 includes a transistor 301 and a relay consisting of an excitation coil 302 and a normally open switch 303, the normally open switch 303 being coupled to the excitation coil 302. In one embodiment, the transistor 301 is an NPN transistor. The base of the NPN transistor receives the level signal via the connection line 106, and the collector of the NPN transistor is grounded. The driving coil 302 is connected between the emitter of the NPN transistor and a dc power supply (e.g., 12V). The normally open switch 303 is controllably connected in series with the energiser KA10 between live and neutral. When the NPN transistor receives a high level of the level signal and is turned on, the exciting coil 302 of the relay is energized, so that the normally open switch 303 of the relay is closed, the signal input switch circuit 304 is connected, and the input path 201 is connected. When the NPN transistor receives a low level of the level signal and is turned off, the exciting coil 302 of the relay is not energized, so that the normally open switch 303 of the relay is turned off, the signal input switch circuit 304 is turned off, and the input path 201 is turned off. Of course, it will be understood by those skilled in the art that the transistor 301 may be a PNP transistor. When the PNP transistor receives a low level of the level signal and is turned on, the exciting coil 302 of the relay is energized, so that the normally open switch 303 of the relay is closed, the signal input switch circuit 304 is connected, and the input path 201 is connected. When the PNP transistor receives a high level of the level signal and is turned off, the exciting coil 302 of the relay is not energized, so that the normally open switch 303 of the relay is turned off, the signal input switch circuit 304 is turned off, and the input path 201 is turned off.

As shown in fig. 3B (in conjunction with fig. 6B), the input circuit 211 of the signal conversion circuit 113 includes a signal input switch circuit 314, and the signal input switch circuit 314 and the control circuit 212 are controllably connected in series between two terminals of the power supply (e.g., between the live line and the neutral line). The configuration of the signal input switch circuit 314 shown in fig. 3B is the same as the circuit configuration of the signal input switch circuit 304 shown in fig. 3A. The transistor 301 in the signal input switch circuit 314 may be an NPN-type transistor, similar to the signal input switch circuit 304 shown in fig. 3A. The base of the NPN transistor receives the pulse signal via the connection line 116, and the collector of the NPN transistor is grounded. The driving coil 302 is connected between the emitter of the NPN transistor and a dc power supply (e.g., 12V). The normally open switch 303 and the control circuit 212 are controllably connected in series between the two ends of the power supply (e.g., between the live and neutral lines). When the NPN transistor receives the high level of the pulse signal and is turned on, the exciting coil 302 of the relay is energized, so that the normally open switch 303 of the relay is closed, the signal input switch circuit 314 is connected, and the input circuit 211 is connected. When the NPN transistor receives the low level of the pulse signal and is turned off, the exciting coil 302 of the relay is not energized, so that the normally open switch 303 of the relay is turned off, the signal input switch circuit 314 is turned off, and the input circuit 211 is turned off. Of course, it will be understood by those skilled in the art that the transistor 301 may be a PNP transistor. When the PNP transistor receives the low level of the pulse signal and is turned on, the exciting coil 302 of the relay is energized, so that the normally open switch 303 of the relay is closed, the signal input switch circuit 314 is connected, and the input circuit 211 is connected. When the PNP type triode receives the high level of the pulse signal and is not turned on, the exciting coil 302 of the relay is not energized, so that the normally open switch 303 of the relay is turned off, the signal input switch circuit 314 is turned off, and the input circuit 211 is turned off.

As shown in fig. 3C (in conjunction with fig. 6A), the input path 201 of the signal conversion circuit 103 includes the signal input switch circuit 305 and the excitation device KA10 (the excitation device KA10 is included in the first relay KA1, see fig. 4A). The signal input switching circuit 305 in the input path 201 includes a thyristor 311 and a relay consisting of an excitation coil 312 and a normally open switch 313, the normally open switch 313 being coupled to the excitation coil 312. The control electrode of thyristor 311 receives the level signal through connection line 106, and the cathode of thyristor 311 is connected to the zero line. The exciting coil 312 is connected between the live line and the anode of the thyristor 311. The normally open switch 313 is controllably connected in series with the excitation coil KA10 between the live and neutral wires. When the thyristor 311 receives a high level of the level signal and is turned on, the exciting coil 312 is energized, so that the normally open switch 313 is closed, the signal input switch circuit 305 is connected, and the input path 201 is connected. When the thyristor 311 receives a low level of the level signal and is turned off, the exciting coil 312 is not energized, so that the normally open switch 313 is turned off, the signal input switch circuit 305 is turned off, and the input path 201 is turned off.

As shown in fig. 3D, the structure of the signal input switch circuit 315 in the input circuit 211 is the same as that of the signal input switch circuit 305 shown in fig. 3C, and is not described here again. In contrast, the gate of the thyristor 311 receives a pulse signal through the connection line 116, and the normally-on switch 313 and the control circuit 212 are controllably connected in series between the live line and the neutral line. When the thyristor 311 is turned on by receiving a high level of the pulse signal, the exciting coil 312 is energized, so that the normally open switch 313 is closed to connect the signal input switch circuit 315 and further the input circuit 211. When the thyristor 311 receives a low level of the pulse signal and is not turned on, the exciting coil 312 is not energized, so that the normally-open switch 313 is turned off to turn off the signal input switch circuit 315, thereby turning off the input circuit 211.

Those skilled in the art will appreciate that embodiments of the signal input switching circuit for receiving an input signal include, but are not limited to, the two embodiments illustrated in fig. 3A-3D above.

Fig. 4A to 4G respectively show specific structures of the respective relays and the time delay relays in the signal conversion circuit 103 in fig. 1A. The signal conversion circuit 103 includes a first relay KA1, a second relay KA2, a third relay KA3, a fourth relay KA4, a fifth relay KA5, a first delay relay KT1, and a second delay relay KT 2.

As shown in fig. 4A, the first relay KA1 includes an excitation device KA10, and a first normally open switch KA11, a second normally open switch KA12, and a normally closed switch KA13 coupled to the excitation device KA 10. As shown in fig. 4B, the second relay KA2 includes an excitation device KA20 and a first normally open switch KA21 and a second normally open switch KA22 coupled to the excitation device KA 20. As shown in fig. 4C, the third relay KA3 includes an excitation device KA30 and a normally open switch KA31 coupled to the excitation device KA 30. As shown in fig. 4D, the fourth relay KA4 includes an excitation device KA40 and a normally open switch KA41 coupled to the excitation device KA 40. As shown in fig. 4E, the fifth relay KA5 includes an excitation device KA50 and a normally open switch KA51 coupled to the excitation device KA 50. As shown in fig. 4F, the first delay relay KT1 includes an excitation delay device KT10 and a normally-closed switch KT11 coupled to the excitation delay device KT 10. As shown in fig. 4G, the second delay relay KT2 includes an excitation delay device KT20 and a first normally-closed switch KT21 and a second normally-closed switch KT22 coupled to the excitation delay device KT 20.

Fig. 5A to 5C respectively show specific configurations of the respective relays of the signal conversion circuit 113 in fig. 1B.

As shown in fig. 5A, the first relay KA6 includes an excitation device KA60, a first normally open switch KA61, a second normally open switch KA62, and a normally closed switch KA 63. As shown in fig. 5B, the second relay KA7 includes an energizing device KA70, a first normally closed switch KA71, a second normally closed switch KA72, and a normally open switch KA 73. As shown in fig. 5C, the third relay KA8 includes an excitation device KA80, a first normally open switch KA81, a second normally open switch KA82, a third normally open switch KA83, and a normally closed switch KA 84.

As known to those skilled in the art, the relays KA1, KA2, KA3, KA4, KA5, KA6, KA7, and KA8 work in the following manners: when the excitation device of the relay is electrified, the switch circuit of the relay generates a preset step change, namely a normally open switch of the relay is closed and a normally closed switch of the relay is opened; when the exciting device of the relay is powered off, the normally open switch of the relay is kept open or the normally closed switch of the relay is kept closed. The working modes of the time delay relays KT1 and KT2 are as follows: when the excitation delay device of the time delay relay is electrified, the switch circuit of the time delay relay can delay the action according to the set time (for example, time t), namely, the normally closed switch of the time delay relay is opened after the set time. When the exciting device of the time delay relay is powered off, the normally closed switch of the time delay relay keeps closed.

In one embodiment, the respective excitation means KA10, KA20, KA30, KA40, KA50, KA60, KA70, KA80 and the excitation delaying means KT10 and KT20 are coils.

Fig. 6A shows a detail of a circuit diagram of the signal conversion circuit 103 in fig. 2A. Specifically, fig. 6A shows details of the input path 201, the control circuit 202, and the output path 203 in the signal conversion circuit 103 in fig. 2A. Fig. 7A shows a timing waveform diagram of the operation of each relay in the signal conversion circuit 103 in fig. 6A.

As shown in fig. 6A, the input path 201 of the signal conversion circuit 103 includes a signal input switch circuit 304 (see fig. 3A for details thereof) and an energizing device KA10 of a first relay KA 1. The signal input switch circuit 304 is controllably connected in series with the actuator KA10 of the first relay KA1 between the two terminals of the power supply, which may be, for example, between the live and neutral conductors as shown in fig. 6A, although the invention is not limited to the live and neutral conductors as shown in fig. 6A. The signal input switch circuit 304 receives a level signal (first system signal) from the controller 104 (shown in fig. 1A) via the connection line 106, and the input path 201 is connected or disconnected in response to a high level or a low level of the received level signal (as described in detail in fig. 3A or 3C). Those skilled in the art will appreciate that the signal input switch circuit 304 in fig. 6A may be replaced with the signal input switch circuit 305 (as shown in fig. 3C).

The control circuit 202 of the signal conversion circuit 103 includes a first control path 601, a second control path 602, and a third control path 603. The first control path 601, the second control path 602 and the third control path 603 are connected in parallel between two terminals of the power supply (e.g., between the live and neutral wires).

The first control path 601 includes an excitation device KA20 of the second relay KA2, a second normally closed switch KT22 of the second delay relay KT2, a first normally open switch KA11 of the first relay KA1, and a first normally open switch KA21 of the second relay KA 2. Wherein, the first normally open switch KA11 of the first relay KA1 and the first normally open switch KA21 of the second relay KA2 are connected in parallel to form a first control parallel circuit 604, and the first control parallel circuit 604, the excitation device KA20 of the second relay KA2 and the second normally closed switch KA22 of the second delay relay KT2 are controllably connected in series between two ends of the power supply KT (such as between a live wire and a neutral wire).

The second control path 602 includes the second normally-open switch KA12 of the first relay KA1, the excitation device KA30 of the third relay KA3, the excitation delay device KT10 of the first delay relay KT1, and the normally-closed switch KT11 of the first delay relay KT 1. The excitation device KA30 of the third relay KA3 and the normally closed switch KT11 of the first time delay relay KT1 are connected in series to form a first series circuit 608, the first series circuit 608 and the excitation delay device KT10 of the first time delay relay KT1 are connected in parallel to form a second control parallel circuit 605, and the second control parallel circuit 605 and the second normally open switch KA12 of the first relay KA1 are controllably connected in series between two ends of a power supply (such as between a live line and a neutral line).

The third control path 603 includes an excitation device KA40 of the fourth relay KA4, an excitation delay device KT20 of the second delay relay KT2, a first normally closed switch KT21 of the second delay relay KT2, a normally closed switch KA13 of the first relay KA1, and a second normally open switch KA22 of the second relay KA 2. The excitation device KA40 of the fourth relay KA4 is connected with the first normally closed switch KT21 of the second time delay relay KT2 in series to form a second series circuit 609, the second series circuit 609 is connected with the excitation delay device KT20 of the second time delay relay KT2 in parallel to form a third control parallel circuit 606, and the third control parallel circuit 606, the normally closed switch KA13 of the first relay KA1 and the second normally open switch KA22 of the second relay KA2 are controllably connected between two ends of a power supply in series (such as between a live line and a neutral line).

The output path 203 of the signal conversion circuit 103 includes a normally open switch KA31 of the third relay KA3, a normally open switch KA41 of the fourth relay KA4, an excitation device KA50 of the fifth relay KA5, and a normally open switch KA51 of the fifth relay KA 5. The normally open switch KA31 of the third relay KA3 is connected in parallel with the normally open switch KA41 of the fourth relay KA4 to form an output parallel circuit 607, the output parallel circuit 607 and the excitation device KA50 of the fifth relay KA5 are controllably connected in series between two ends of a power supply (such as between a live wire and a zero wire), and the normally open switch KA51 of the fifth relay KA5 is coupled to the excitation device KA50 of the fifth relay KA 5. The normally open switch KA51 of the fifth relay KA5 provides a signal output, i.e., a pulse signal (second system signal), to the electrical equipment interface 102 (as shown in fig. 1A) via the connection line 107.

The signal conversion circuit 103 in fig. 6A (including relays and their corresponding energizing devices and switches) receives an input level signal (first system signal) and converts it into a pulse signal (second system signal) to provide a signal output. The timing waveform diagram of the action of each relay in signal conversion circuit 103 in fig. 6A is shown in fig. 7A, and the state changes of the corresponding energizing devices and switches of each relay are shown in table 1 below.

TABLE 1

	Initial	T1	T2	T3	T4	T5	T6	T7	T8
										Input signal	0	0→1	1	1→0	0	0→1	1	1→0	0
KA10	0	0→1	1	1→0	0	0→1	1	1→0	0
										KA11	0	0→1	1	1→0	0	0→1	1	1→0	0
KA12	0	0→1	1	1→0	0	0→1	1	1→0	0
										KA13	1	1→0	0	0→1	1	1→0	0	0→1	1
KA20	0	0→1	1	1	1→0	0→1	1	1	1→0
										KA21	0	0→1	1	1	1→0	0→1	1	1	1→0
KA22	0	0→1	1	1	1→0	0→1	1	1	1→0
										KA30	0	0→1	1→0	0	0	0→1	1→0	0	0
KA31	0	0→1	1→0	0	0	0→1	1→0	0	0
										KA40	0	0	0	0→1	1→0	0	0	0→1	1→0
KA41	0	0	0	0→1	1→0	0	0	0→1	1→0
										KT10	0	0→1	1	1→0	0	0→1	1	1→0	0
KT11	1	1	1→0	0→1	1	1	1→0	0→1	1
										KT20	0	0	0	0→1	1→0	0	0	0→1	1→0
KT21	1	1	1	1	1→0→1	1	1	1	1→0→1
										KT22	1	1	1	1	1→0→1	1	1	1	1→0→1
KA50	0	0→1	1→0	0→1	1→0	0→1	1→0	0→1	1→0
										KA51 (output)	0	0→1	1→0	0→1	1→0	0→1	1→0	0→1	1→0

For ease of understanding, the following is illustrated for Table 1 above:

for the excitation device, "0" represents that the excitation device is powered down, "1" represents that the excitation device is powered up, "0 → 1" represents that the excitation device is changed from powered down to powered up, and "1 → 0" represents that the excitation device is changed from powered up to powered down.

For the input signal and the output signal, "0" indicates that the signal is at a low level, "1" indicates that the signal is at a high level, "0 → 1" indicates that the signal changes from a low level to a high level, and "1 → 0" indicates that the signal changes from a high level to a low level.

For a switch, "0" indicates that the switch is open, "1" indicates that the switch is closed, "0 → 1" indicates that the switch is changed from open to closed, and "1 → 0" indicates that the switch is changed from closed to open.

Wherein the time intervals between T1 and T2, between T3 and T4, between T5 and T6, and between T7 and T8 are all T seconds.

The operation of the corresponding activation devices and switches of the various relays in signal conversion circuit 103 of fig. 6A is as follows (in conjunction with fig. 7A):

at an initial time: when the input signal is at a low level, the signal input switch circuit 304 is turned off, the excitation devices (KA10, KA20, KA30, KA40, KA50, KT1 and KT2) of the relays are not energized, the normally open switch is kept open, and the normally closed switch is kept closed.

At time T1, an input signal (level signal) changes from low level to high level, the signal input switch circuit 304 is turned on, the excitation device KA10 of the first relay KA1 is energized, the first normally open switch KA11 and the second normally open switch KA12 are closed, and the normally closed switch KA13 is opened. The second normally closed switch KT22 of first normally open switch KA11 closure and second time delay relay KT2 makes KA20 get electricity, and the second normally open switch KA12 closure makes KA30 get electricity with first time delay relay KT 1's normally closed switch KT11 closure, and then second relay KA 2's first normally open switch KA21 and second normally open switch KA22 and third relay KA 3's normally open switch KA31 are closed. The normally open switch KA31 is closed, so that the excitation device KA50 of the fifth relay KA5 is powered, the normally open switch KA51 of the fifth relay KA5 is closed, and the signal output end outputs a high level. The second normally open switch KA12 is closed to electrify the excitation delay device KT10 of the first time delay relay KT1, and the normally closed switch KT11 of the first time delay relay KT1 is opened after a delay of T seconds (i.e., at the time of T2). The normally closed switch KA13 is opened, so that the excitation device KA40 of the fourth relay KA4 and the excitation delay device KT20 of the second delay relay KT2 are continuously powered down.

At time T2, the input signal remains high. As described at time T1, when the normally closed switch KT11 of the first delay relay KT1 is opened at time T2, the excitation device KA30 of the third relay KA3 is powered off, and the normally open switch KA31 of the third relay KA3 is opened. The normally open switch KA31 is disconnected, so that the excitation device KA50 of the fifth relay KA5 is powered down, the normally open switch KA51 of the fifth relay KA5 is disconnected, the high level of the signal output end is changed into the low level, and the high level pulse of t seconds is output. The states of other excitation devices (e.g., KA10, KA20, KA40, KT10 and KT20) are the same as T1, i.e., KA10, KA20 and KT10 are continuously powered, and KA40 and KT20 are continuously powered down.

At time T3, when an input signal (level signal) changes from high level to low level, the signal input switch circuit 304 is turned off, the excitation device KA10 of the first relay KA1 is powered off, the first normally open switch KA11 and the first normally open switch KA12 are opened, and the normally closed switch KA13 is closed. The first normally open switch KA21 is closed and the second normally closed switch KT22 is closed, so that the excitation device KA20 of the second relay KA2 is continuously powered, and the second normally open switch KA22 is kept closed. Normally closed switch KA13 is closed, second normally open switch KA22 is closed and first normally closed switch KT21 is closed to make fourth relay KA 4's excitation device KA40 get electricity, then normally open switch KA41 is closed, and then fifth relay KA 5's excitation device KA50 gets electricity, and fifth relay KA 5's normally open switch KA51 is closed, and signal output part's low level becomes the high level. The closed normally-closed switch KA13 and the closed second normally-open switch KA22 enable the excitation delay device KT20 of the second time-delay relay KT2 to be electrified, and the first normally-closed switch KT21 of the second time-delay relay KT2 is opened after a time delay of T seconds (i.e., at a time T4). When the first normally-open switch KA12 is opened, the excitation device KA30 of the third relay KA3 is continuously powered down, the excitation delay device KT10 of the first time delay relay KT1 is powered down, and the normally-closed switch KT11 is closed.

At time T4, the input signal remains low. If the description of the time T3 is carried out, the first normally closed switch KT21 of the second time delay relay KT2 is disconnected at the time T4, the excitation device KA40 of the fourth relay KA4 is powered off, the normally open switch KA41 is disconnected, the excitation device KA50 of the fifth relay KA5 is powered off, the normally open switch KA51 is disconnected, the high level of the signal output end is changed into the low level, and the high level pulse of T seconds is output again. As described at time T3, the second normally-closed switch KT22 of the second delay relay KT2 is opened at time T4, so that the excitation device KA20 of the second relay KA2 is powered down, and then the second normally-open switch KA22 of the second relay KA2 is opened. The second normally open switch KA22 is opened to make KT20 powered down, so that the first normally closed switch KT21 and the second normally closed switch KT22 of the second time delay relay KT2 are closed again. The state of the other excitation devices (e.g., KA10, KA30, and KT10) is the same as at time T3, i.e., the power-down state is maintained. As described above, at time T4, all of the actuators are reset to the state at the initial time, i.e., are powered down.

The above operations at times T1-T4 are repeated at times T5-T8. That is, when the input signal (level signal) changes from low level to high level, continues to high level, changes from high level to low level, continues to low level again (i.e., one cycle of level signal), the corresponding energizing devices and switches of the respective relays repeat the above-described operations at times T1-T4, thereby achieving conversion of the level signal into a pulse signal.

It should be noted that in the signal conversion circuit 103 shown in fig. 6A, the application of the second relay KA2 is particularly advantageous. Specifically, the purpose of the second relay KA2 is to prevent the signal output side from erroneously outputting a pulse when the circuit is powered on before the signal is input. If the second relay KA2 is not provided, the excitation device KA40 of the fourth relay KA4 is powered on when the circuit is powered on, and then the normally open switch KA41 is closed, so that the excitation device KA50 of the fifth relay KA5 is powered on, and therefore the output side (namely the KA51 end) can output a pulse level of t seconds once, which is a false triggering condition and is inconsistent with the conversion logic originally to be realized by the circuit.

As can be seen from fig. 7A, each time the input signal (level signal) of the signal conversion circuit 103 changes in level, the signal conversion circuit 103 outputs a pulse signal with time t. Specifically, when the input signal generates a rising edge transition, the signal output end synchronously outputs a pulse signal with time t, and when the input signal subsequently generates a falling edge transition, the signal output end outputs the pulse signal with time t again, and the steps are repeated. Thereby, the signal conversion circuit 103 realizes conversion of the level signal into the pulse signal.

As can be seen in fig. 6A and 7A in combination, in the signal conversion circuit 103, the use of the first delay relay KT1 and the second delay relay KT2 provides a pulse-off means of the signal output terminal. Specifically, when the level of the input signal changes each time, only one of the excitation device KA30 of the third relay KA31 and the excitation device KA40 of the fourth relay KA4 is energized, so that the excitation device KA50 of the fifth relay KA5 is energized, thereby energizing the normally open switch KA51 to be closed to output a high level. The first delay relay KT1 immediately switches off the excitation device KA30 of the third relay KA3 after a delay of T seconds (i.e., at the time T2 or T6), and the second delay relay KT2 immediately switches off the excitation device KA40 of the fourth relay KA4 after a delay of T seconds (i.e., at the time T4 or T8), thereby powering off the excitation device KA50 of the fifth relay KA5, thereby outputting a pulse level of T seconds. It can be seen that the energizing devices of the first delay relay KT1 and the second delay relay KT2 are delayed by a time t seconds so that the duration of the pulse signal generated by the signal output terminal is also t seconds. As can be appreciated by those skilled in the art, the energizing device delay times of the first and second delay relays KT1 and KT2 may be different.

As further shown in fig. 7A, the holding signal is included in one period of the level signal (input signal). The leading edge jump of the hold signal can be used for starting the running or the operation of the electric equipment, the trailing edge jump of the hold signal can be used for stopping the running or the operation of the electric equipment, and the interval between the leading edge jump and the trailing edge jump of the hold signal can be used for keeping the running or the operation of the electric equipment. The leading edge transition is a rising transition and the trailing edge transition is a falling transition, with a high level between the rising and falling transitions. Of course, those skilled in the art will appreciate that leading edge transitions and trailing edge transitions may also be embodied as: the leading edge transition is a falling transition and the trailing edge transition is a rising transition, with a low level between the falling and rising transitions. Further, the time width of the first period (time interval between T1 and T3 as shown in fig. 7A) and the time width of the second period (time interval between T5 and T7 as shown in fig. 7A) of the input signal (level signal) may be different, but they may also be the same as recognized by those skilled in the art.

As further shown in fig. 7A, two pulse signals (output signals) are a period, the first pulse signal can be used to start the operation or operation of the electrical equipment, the second pulse signal can be used to stop the operation or operation of the electrical equipment, and the signal between the first pulse signal and the second pulse signal is used to maintain the operation or operation of the electrical equipment. Also, since the time width of the first period and the time width of the second period of the input signal (level signal) may be different or the same, the time width of the two pulse signals in the first period (e.g., the width between T2 and T3) and the time width between the two pulse signals in the second period (e.g., the width between T6 and T7) may be different or the same in the output signal, respectively.

Fig. 6B shows a detail of a circuit diagram of the signal conversion circuit 113 in fig. 2B. Specifically, fig. 6B shows details of the input circuit 211, the control circuit 212, and the output path 213 in the signal conversion circuit 113 in fig. 2B. Fig. 7B shows a timing waveform diagram of the operation of each relay in the signal conversion circuit 113 in fig. 6B.

As shown in fig. 6B, signal conversion circuit 113 includes an input circuit 211, a control circuit 212, and an output path 213. The input circuit 211 includes a signal input switch circuit 314 (shown in fig. 3B) for receiving a pulse signal (second system signal) from the controller 104 (shown in fig. 1B) via the connection line 116. Those skilled in the art will appreciate that the signal input switch circuit 314 in fig. 6B may be replaced with the signal input switch circuit 315 (shown in fig. 3D).

The control circuit 212 includes a first control path 611 and a second control path 612, the first control path 611 and the second control path 612 being connected in parallel. Also, the parallel circuit of the first control path 611 and the second control path 612 and the signal input switching circuit 314 are controllably connected in series between the two ends of the power supply, which may be, for example, between the live and neutral lines as shown in fig. 6B. It should be understood by those skilled in the art that the present invention is not limited to use between live and neutral conductors as shown in figure 6B.

The first control passage 611 includes the energizing device KA60 of the first relay KA6, the first normally open switch KA61 of the first relay KA6, the first normally closed switch KA71 of the second relay KA7, and the normally closed switch KA84 of the third relay KA 8. In this first control path 611, the normally closed switch KA84 of the third relay KA8 and the first normally open switch KA61 of the first relay KA6 are connected in parallel to form a first control parallel circuit 613, and the first control parallel circuit 613, the first normally closed switch KA71 of the second relay KA7 and the excitation device KA60 of the first relay KA6 are connected in series.

The second control path 612 includes an energizing device KA70 of the second relay KA7, a normally closed switch KA63 of the first relay KA6, a first normally open switch KA81 of the third relay KA8, and a normally open switch KA73 of the second relay KA 7. In the second control path 612, the first normally open switch KA81 of the third relay KA8 and the normally open switch KA73 of the second relay KA7 are connected in parallel to form a second control parallel circuit 614, and the second control parallel circuit 614, the normally closed switch KA63 of the first relay KA6 and the excitation device KA70 of the second relay KA7 are connected in series.

The output passage 213 includes an excitation device KA80 of the third relay KA8, a second normally open switch KA82 of the third relay KA8, a third normally open switch KA83 of the third relay KA8, a second normally closed switch KA72 of the second relay KA7, and a second normally open switch KA62 of the first relay KA 6. In the output path 213, the second normally open switch KA62 of the first relay KA6 and the second normally open switch KA82 of the third relay KA8 are connected in parallel to form an output parallel circuit 615. The output parallel circuit 615, the second normally closed switch KA72 of the second relay KA7 and the excitation device KA80 of the third relay KA8 are controllably connected in series between two ends of the power supply, and the third normally open switch KA83 of the third relay KA8 is coupled to the excitation device KA80 of the third relay KA8 and provides a signal output, i.e., a level signal (first system signal), to the electrical equipment interface 102 (as shown in fig. 1B).

The signal conversion circuit 113 (including relays and their corresponding switches) in fig. 6B receives an input pulse signal (second system signal) and converts it into a level signal (first system signal) to provide a signal output. The timing waveform diagram of the action of each relay in the signal conversion circuit 113 in fig. 6B is shown in fig. 7B, and the state changes of the corresponding energizing devices and switches of each relay are shown in table 2 below.

TABLE 2

	Initial	T1	T2	T3	T4	T5	T6	T7	T8
										Input signal	0	0→1	1→0	0→1	1→0	0→1	1→0	0→1	1→0
KA60	0	0→1	1→0	0	0	0→1	1→0	0	0
										KA61	0	0→1	1→0	0	0	0→1	1→0	0	0
KA62	0	0→1	1→0	0	0	0→1	1→0	0	0
										KA63	1	1→0	0→1	1	1	1→0	0→1	1	1
KA70	0	0	0	0→1	1→0	0	0	0→1	1→0
										KA71	1	1	1	1→0	0→1	1	1	1→0	0→1
KA72	1	1	1	1→0	0→1	1	1	1→0	0→1
										KA73	0	0	0	0→1	1→0	0	0	0→1	1→0
KA80	0	0→1	1	1→0	0	0→1	1	1→0	0
										KA81	0	0→1	1	1→0	0	0→1	1	1→0	0
KA82	0	0→1	1	1→0	0	0→1	1	1→0	0
										KA84	1	1→0	0	0→1	1	1→0	0	0→1	1
KA83 (output)	0	0→1	1	1→0	0	0→1	1	1→0	0

For ease of understanding, the following is illustrated for Table 2 above:

The operation of the respective energizing devices and switches of the various relays in signal conversion circuit 103 of fig. 6B is as follows (in conjunction with fig. 7B):

at the initial timing, the input signal (pulse signal) is at a low level. The actuators KA60, KA70, and KA80 of the relays are in a power-down state. The first normally open switch KA61 and the second normally open switch KA62 of the first relay KA6 are opened, and the normally closed switch KA63 is closed. The first normally closed switch KA71 and the second normally closed switch KA72 of the second relay KA7 are closed, and the normally open switch KA73 is opened. The first normally-open switch KA81, the second normally-open switch KA82 and the third normally-open switch KA83 of the third relay KA8 are opened, and the normally-closed switch KA84 is closed. The output terminal is at low level.

At time T1: the input signal changes from low level to high level, and the signal input switch circuit 314 is turned on; an excitation device KA60 of the first relay KA6 is electrified, a first normally open switch KA61 and a second normally open switch KA62 are closed, and a normally closed switch KA63 is opened; an excitation device KA80 of the third relay KA8 is electrified, and a second normally open switch KA82 and a third normally open switch KA83 are closed; the closure of KA83 causes the output signal (level signal) to change from low level to high level. At this time, since the normally closed switch KA63 is opened, the excitation device KA70 is not energized, and therefore the first normally closed switch KA71 and the second normally closed switch KA72 are kept closed, and the normally open switch KA73 is kept opened.

At time T2: when the high level of the input signal is changed into the low level, the signal input switch circuit 314 is switched off, the excitation device KA60 is powered down, the first normally open switch KA61 and the second normally open switch KA62 are switched off, and the normally closed switch KA63 is switched on; the excitation device KA70 is not electrified, the first normally closed switch KA71 and the second normally closed switch KA72 are kept closed, and the normally open switch KA73 is kept open; the driving device KA80 is always powered, and the second normally-open switch KA82 and the third normally-open switch KA83 are kept closed, so that the output signal provided by KA83 is still high.

At time T3: the input signal changes from low level to high level, and the signal input switch circuit 314 is turned on. When the excitation device KA80 is powered currently, the first normally open switch KA81 is closed, the second normally open switch KA82 and the third normally open switch KA83 are kept closed, and the normally closed switch KA84 is kept open; the normally closed switch KA84 is opened, so that the excitation device KA60 cannot be powered at present, the first normally open switch KA61 and the second normally open switch KA62 are opened, and the normally closed switch KA63 is closed; the first normally-open switch KA81 is closed to enable the excitation device KA70 to be electrified, the first normally-closed switch KA71 and the second normally-closed switch KA72 are disconnected, and the normally-open switch KA73 is closed; the excitation device KA80 is powered down due to the fact that the second normally-closed switch KA72 is disconnected, then the first normally-open switch KA81 becomes disconnected, the second normally-open switch KA82 becomes disconnected, the third normally-open switch KA83 becomes disconnected, the normally-closed switch KA84 becomes closed, and the output signal is changed from a high level to a low level.

At time T4: the input signal changes from high level to low level, and the signal input switch circuit 314 is turned off; the excitation device KA60 still cannot be electrified, the first normally open switch KA61 and the second normally open switch KA62 are disconnected, and the normally closed switch KA63 is closed; the KA70 is powered down, the first normally closed switch KA71 and the second normally closed switch KA72 are closed, and the normally open switch KA73 is opened; because second normally open switch KA62 and second normally open switch KA82 are the disconnection this moment, so KA80 lasts not to be electrified, and first normally open switch KA81 keeps the disconnection, and second normally open switch KA82 keeps the disconnection, and third normally open switch KA83 keeps the disconnection, and normally closed switch KA84 keeps closed, and output signal keeps the low level. As described above, at time T4, all of the actuators are reset to the state at the initial time, i.e., are powered down.

The above operations of T1-T4 are repeated for a period of T5-T8. That is, when the input signal (pulse signal) is again two pulse signals in succession, the associated energizing devices and switches of the respective relays repeat the above-described operations at times T1-T4, thereby achieving conversion of the pulse signals into level signals.

It should be noted that the design in the signal conversion circuit 113 shown in fig. 6B realizes a function of changing the output signal from a high level to a low level and keeping the output signal at the low level after the pulse disappears. Specifically, when the output signal is at a high level (i.e., KA83 is closed), when a pulse signal is input again, the excitation device KA70 is powered on, and the power supply of the excitation devices KA60 and KA80 is cut off, so that the output signal changes from a high level to a low level (i.e., KA83 is closed to be opened), and when the pulse disappears, the excitation device KA70 is powered off at the same time, and the excitation device KA80 is still in a power-off state, so that the low-level state of the output signal is maintained (i.e., KA83 is kept opened).

In the signal conversion circuit 113, each time a pulse signal is input, a transition between a low level and a high level occurs in the output signal, and thus conversion of the pulse signal into a level signal is realized. Specifically, when a short-time pulse signal is input to the input terminal, the signal at the output terminal will change to the current signal state, for example, when the current output signal is at a low level, the output signal will change from a low level to a high level when the pulse signal is input; when the input terminal inputs a short pulse signal again, the output signal of the output terminal changes from high level to low level again, and so on.

It should be noted that the level signal (output signal) and the pulse signal (input signal) shown in fig. 7B are the same kind of signals as those in fig. 7A, and are not described again here. Also, as can be appreciated by those skilled in the art, the pulse duration of each pulse signal (input signal) may be different, such as t1 and t2 shown in fig. 7B.

Fig. 8 shows a system of bi-directional communication from controller 104 to appliance interface 102, where controller 104 uses level signals and appliance 101 uses pulsed signals, which are bi-directionally communicated through signal conversion circuit 103 and signal conversion circuit 113.

As shown in fig. 8, the control system 800 includes a controller 104, a signal conversion circuit 103 (i.e., a first signal conversion circuit), a signal conversion circuit 113 (i.e., a second signal conversion circuit), an electrical device interface 102, an electrical device 101, and a control panel 105. In the control system 800, the controller 104 is connected to the signal conversion circuit 103 through the connection line 106, the signal conversion circuit 103 is connected to the electrical equipment interface 102 through the connection line 107, and the electrical equipment interface 102 is connected to the electrical equipment 101. The electrical equipment interface 102 is also connected to the signal conversion circuit 113 through a connection line 807, and the signal conversion circuit 113 is connected to the controller 104 through a connection line 806. Among them, the controller 104, the signal conversion circuit 103, the electric device interface 102, the electric device 101, the control panel 105, and the

connection lines

106 and 107 are the same as the corresponding components shown in fig. 1A. The specific circuit structure of the signal conversion circuit 103 is shown in detail in fig. 6A, and the specific circuit structure of the signal conversion circuit 113 is shown in detail in fig. 6B. The signal conversion circuit 103 is used to convert the level signal into the pulse signal, and the specific conversion manner has been elaborated in the description of fig. 6A and 7A, and is not described here again. The signal conversion circuit 113 is used to convert the pulse signal into a level signal, and the specific conversion manner has been described in detail in the description of fig. 6B and 7B, and is not described here again.

In this control system 800, the controller 104 generates a level signal (first system signal) and sends the level signal to the signal conversion circuit 103. The signal conversion circuit 103 receives the level signal, converts the level signal into a pulse signal (second system signal), and transmits the pulse signal to the electrical equipment interface 102. Appliance 101 receives the pulse signal from appliance interface 102 to perform an operation, such as turning on or off a washing program of appliance 101, according to the received pulse signal.

And in the control system 800, the control panel 105 is connected to the electrical equipment interface 102 and controls the electrical equipment interface 102 to generate a pulse signal. The pulse signal generated by the appliance interface 102 is used to control the operation of the appliance 101, such as turning on or off a washing program. The signal conversion circuit 113 receives the pulse signal generated by the electrical appliance interface 102 and converts the received pulse signal into a level signal. Controller 104 receives the converted level signal from signal conversion circuit 113 and monitors the operation of electrical apparatus 101 according to the received level signal, such as counting how many times electrical apparatus 101 is turned on or off in total within a certain time, counting how long a certain time is between two times of turning on or off of a cleaning program of electrical apparatus 101, or how long a certain time is from turning on to turning off of electrical apparatus 101 in total, and the like. Such statistics by controller 104 provide some data support for possible maintenance or repair of appliance 101.

The control system 800 provides bidirectional communication between the controller 104 and the electrical equipment interface 102, thereby enabling control of the operation of the electrical equipment 101 and monitoring of the operation of the electrical equipment 101 through feedback of the operation of the electrical equipment 101 without changing the system (level signal) of the signal used by the controller 104 and the system (pulse signal) of the signal used by the electrical equipment 101.

Fig. 9 shows a system of bidirectional communication from the controller 104 to the electrical device interface 102, wherein the controller 104 uses a pulse signal, and the electrical device 101 uses a level signal, which are bidirectionally communicated through the signal conversion circuit 103 (i.e., a first signal conversion circuit) and the signal conversion circuit 113 (i.e., a second signal conversion circuit).

As shown in fig. 9, the control system 900 includes a controller 104, a signal conversion circuit 103 (i.e., a first signal conversion circuit), a signal conversion circuit 113 (i.e., a second signal conversion circuit), an electrical device interface 102, an electrical device 101, and a control panel 105. In the control system 900, the controller 104 is connected to the signal conversion circuit 113 through the connection line 116, the signal conversion circuit 113 is connected to the electrical equipment interface 102 through the connection line 117, and the electrical equipment interface 102 is connected to the electrical equipment 101. The electrical equipment interface 102 is also connected to the signal conversion circuit 103 through a connection line 917, and the signal conversion circuit 103 is connected to the controller 104 through a connection line 916. Among them, the controller 104, the signal conversion circuit 113, the electric device interface 102, the electric device 101, the control panel 105, and the

connection lines

116 and 117 are the same as the corresponding components shown in fig. 1B. The specific circuit structure of the signal conversion circuit 103 is shown in detail in fig. 6A, and the specific circuit structure of the signal conversion circuit 113 is shown in detail in fig. 6B. The signal conversion circuit 103 is used to convert the level signal into the pulse signal, and the specific conversion manner has been elaborated in the description of fig. 6A and 7A, and is not described here again. The signal conversion circuit 113 is used to convert the pulse signal into a level signal, and the specific conversion manner has been described in detail in the description of fig. 6B and 7B, and is not described here again. .

In this control system 900, the controller 104 generates a pulse signal (second system signal) and sends the pulse signal to the signal conversion circuit 113 via the connection line 116. The signal conversion circuit 113 receives the pulse signal, converts the pulse signal into a level signal (first system signal), and transmits the level signal to the electrical equipment interface 102 via the connection line 117. Electrical appliance 101 receives the level signal from electrical appliance interface 102 to perform an operation, such as turning on or off a washing program of electrical appliance 101, according to the received level signal.

Also in this control system 900, the control panel 105 is connected to the electrical device interface 102 and controls the electrical device interface 102 to generate a level signal, and the level signal generated by the electrical device interface 102 is used to control the operation of the electrical device 101, such as turning on or off a washing program and the like. The signal conversion circuit 103 receives the level signal generated by the electrical equipment interface 102 via the connection line 917 and converts the received level signal into a pulse signal. Controller 104 receives the converted pulse signal from signal conversion circuit 103 via connection line 916 and monitors the operation of electrical apparatus 101 according to the received pulse signal, such as counting how many times electrical apparatus 101 is turned on or off in total within a certain time, counting how long a certain time is between two times of turning on or off of the cleaning program of electrical apparatus 101, or how long a certain time is from turning on to turning off of electrical apparatus in total, etc. Such statistics by controller 104 provide some data support for possible maintenance or repair of appliance 101.

The control system 900 provides bidirectional communication between the controller 104 and the electrical equipment interface 102, thereby enabling control of the operation of the electrical equipment 101 and monitoring of the operation of the electrical equipment 101 through feedback of the operation of the electrical equipment 101 without changing the system (pulse signal) of the signal used by the controller 104 and the system (level signal) of the signal used by the electrical equipment 101.

Controller 104 includes various forms of controllers for controlling the operation of electrical appliance 101. As one embodiment, as shown in fig. 10, the controller 104 comprises a control computer including a bus 1001, a processor 1002, an input interface 1003, an output interface 1005, and a memory 1007, the memory 1007 storing a program 1008 thereon. The processor 1002, the input interface 1003, the output interface 1005 and the memory 1007 are each communicatively coupled to a bus, such that the processor 1002 can control the operation of the input interface 1003, the output interface 1005 and the memory 1007. Specifically, the memory 1007 is used to store programs, instructions, and data, and the processor 1002 reads the programs, instructions, and data from the memory 1007 and can write the data to the memory 1007. The output interface 1005 may be connected to the signal conversion circuit 103 in fig. 1A and 8 or the signal conversion circuit 113 in fig. 1B and 9 through a connection line 1006 to output a signal, and the input interface 1003 may be connected to the signal conversion circuit 113 in fig. 8 or the signal conversion circuit 103 in fig. 9 through a connection line 1004 to receive a signal.

Although the present invention will be described with reference to the particular embodiments shown in the drawings, it should be understood that many variations of the two signal conversion circuits and the various control systems of the present invention are possible without departing from the spirit and scope of the teachings of the present invention. Those of ordinary skill in the art will also realize that there are different ways of varying the details of the structures in the embodiments disclosed in this application that fall within the spirit and scope of the application and the claims.

Claims

1. A signal conversion circuit (103), the signal conversion circuit (103) for converting a signal of a first standard into a signal of a second standard, characterized by:

the signal conversion circuit (103) includes:

an input path (201), the input path (201) being configured to receive the first format signal;

a control circuit (202); and

an output path (203), the output path (203) being for outputting the second format signal;

each of the input path (201), the control circuit (202) and the output path (203) comprising at least one actuation device (KA 10; KA20, KA30, KA 40; KA 50);

each of the input path (201), the control circuit (202) and the output path (203) is controllably connected between two ends of a power supply.

2. The signal conversion circuit (103) of claim 1, wherein:

the control circuit (202) further comprises at least one excitation delay means (KT10, KT 20).

3. The signal conversion circuit (103) of claim 1, wherein:

the signal conversion circuit (103) comprises a first relay (KA1), a second relay (KA2), a third relay (KA3), a fourth relay (KA4), a fifth relay (KA5), a first time delay relay (KT1) and a second time delay relay (KT 2);

the first relay (KA1) comprises an excitation device (KA10), a first normally open switch (KA11), a second normally open switch (KA12) and a normally closed switch (KA 13);

the second relay (KA2) comprises an excitation device (KA20), a first normally open switch (KA21) and a second normally open switch (KA 22);

the third relay (KA3) comprises an excitation device (KA30) and a normally open switch (KA 31);

the fourth relay (KA4) comprises an excitation device (KA40) and a normally open switch (KA 41);

the fifth relay (KA5) comprises an excitation device (KA50) and a normally open switch (KA 51);

the first time delay relay (KT1) comprises an excitation delay device (KT10) and a normally closed switch (KT 11);

the second time delay relay (KT2) comprises an excitation delay device (KT20), a first normally closed switch (KT21) and a second normally closed switch (KT 22);

the input path (201) comprising a signal input switch circuit (304), the signal input switch circuit (304) being arranged to receive the signal of the first regime, the input path (201) further comprising the energising means (KA10) of the first relay (KA1), the energising means (KA10) of the first relay (KA1) being controllably connected in series with the signal input switch circuit (304) between the two terminals of the power supply;

the control circuit (202) comprises a first control path (601), a second control path (602) and a third control path (603);

the first control path (601) comprising the excitation means (KA20) of the second relay (KA2), the second normally closed switch (KT22) of the second time delay relay (KT2), the first normally open switch (KA11) of the first relay (KA1) and the first normally open switch (KA21) of the second relay (KA2),

wherein in the first control path (601) the first normally open switch (KA11) of the first relay (KA1) and a first normally open switch (KA21) of the second relay (KA2) are connected in parallel forming a first control parallel circuit (604), and the first control parallel circuit (604), the energizing means (KA20) of the second relay (KA2) and the second normally closed switch (KT22) of the second time delay relay (KT2) are controllably connected in series between the two ends of the power supply;

the second control path (602) comprising the second normally open switch (KA12) of the first relay (KA1), the excitation means (KA30) of the third relay (KA3), the excitation delay means (KT10) of the first time delay relay (KT1) and the normally closed switch (KT11) of the first time delay relay (KT1),

wherein in the second control path (602) the excitation means (KA30) of the third relay (KA3) and the normally closed switch (KT11) of the first time delay relay (KT1) are connected in series forming a first series circuit (608), the first series circuit (608) is connected in parallel with the excitation delay means (KT10) of the first time delay relay (KT1) forming a second control parallel circuit (605), and the second control parallel circuit (605) is controllably connected in series with the second normally open switch (KA12) of the first relay (KA1) between the two terminals of the power supply;

the third control path (603) comprising the excitation means (KA40) of the fourth relay (KA4), the excitation delay means (KT20) of the second time delay relay (KT2), the first normally closed switch (KT21) of the second time delay relay (KT2), the normally closed switch (KA13) of the first relay (KA1) and the second normally open switch (KA22) of the second relay (KA2),

wherein in the third control path (603) the excitation means (KA40) of the fourth relay (KA4) and the first normally closed switch (KT21) of the second time delay relay (KT2) are connected in series forming a second series circuit (609), the second series circuit (609) and the excitation delay means (KT20) of the second time delay relay (KT2) are connected in parallel as a third control parallel circuit (606), and the third control parallel circuit (606), the normally closed switch (KA13) of the first relay (KA1) and the second normally open switch (KA22) of the second relay (KA2) are controllably connected in series between the two ends of the power supply;

the output passage (203) comprising the normally open switch (KA31) of the third relay (KA3), the normally open switch (KA41) of the fourth relay (KA4), the excitation device (KA50) of the fifth relay (KA5) and the normally open switch (KA51) of the fifth relay (KA5),

wherein in the output channel (203), the normally open switch (KA31) of the third relay (KA3) is connected in parallel with the normally open switch (KA41) of the fourth relay (KA4) forming an output parallel circuit (607), the output parallel circuit (607) and the excitation device (KA50) of the fifth relay (KA5) are controllably connected in series between the two ends of the power source, and the normally open switch (KA51) of the fifth relay (KA5) is coupled to the excitation device (KA50) of the fifth relay (KA5) and provides an output.

4. The signal conversion circuit (103) of claim 3, wherein:

one cycle of the first standard signal comprises a holding signal, wherein the leading edge jump of the holding signal starts the operation or the operation of electrical equipment, the trailing edge jump of the holding signal stops the operation or the operation of the electrical equipment, and the operation or the operation of the electrical equipment is kept between the leading edge jump of the holding signal and the trailing edge jump of the holding signal;

and one period of the second standard signal comprises two pulse signals, the first pulse signal starts the running or operation of the electrical equipment, the second pulse signal stops the running or operation of the electrical equipment, and the running or operation of the electrical equipment is kept between the first pulse signal and the second pulse signal.

5. The signal conversion circuit (103) of claim 4, wherein:

the leading edge transition is a rising transition and the trailing edge transition is a falling transition, with a high level between the rising transition and the falling transition.

6. The signal conversion circuit (103) of claim 4, wherein:

the leading edge transition is a falling transition and the trailing edge transition is a rising transition, with a low level between the falling transition and the rising transition.

7. The signal conversion circuit (103) of claim 4, wherein:

time widths of a first period and a second period of the hold signal of the first system signal can be different, and a time width between two pulse signals in the first period and a time width between two pulse signals in the second period of the second system signal can be different.

8. The signal conversion circuit (103) of claim 2, wherein:

the excitation means (KA 10; KA20, KA30, KA 40; KA50) and the excitation delay means (KT10, KT20) are coils.

9. A control system (100), characterized by:

the control system includes:

a controller (104);

a signal conversion circuit (103);

an appliance device interface (102); and

an electrical apparatus (101),

wherein:

the controller (104) is connected with the signal conversion circuit (103) so that a first standard signal generated by the controller (104) is input to the signal conversion circuit (103);

the signal conversion circuit (103) converts the first standard signal into a second standard signal, and the signal conversion circuit (103) is connected with the electrical equipment interface (102) and transmits the second standard signal to the electrical equipment interface (102);

the electrical equipment (101) is connected with the electrical equipment interface (102) and receives the second standard signal from the electrical equipment interface (102), the second standard signal is used for controlling the operation of the electrical equipment (101),

wherein the signal conversion circuit (103) is a signal conversion circuit (103) according to any of claims 1-8.

10. The control system (100) of claim 9, wherein:

the control system further comprises a control panel (105), wherein the control panel (105) is connected to the electrical equipment interface (102) and can control the electrical equipment interface (102) to generate a second standard signal, and the second standard signal is used for controlling the operation of the electrical equipment (101).

11. The control system (100) according to claim 9 or 10, wherein:

the appliance (101) is a soot cleaner and the operation of the appliance (101) is the switching on and off of a washing program.

12. A signal conversion circuit (113), the signal conversion circuit (113) being configured to convert signals of a second system into signals of a first system, characterized in that:

the signal conversion circuit (113) includes:

an input circuit (211), the input circuit (211) being configured to receive the second format signal;

a control circuit (212); and

an output path (213), the output path (213) for outputting the first format signal;

each of the control circuit (212) and the output channel (213) comprises at least one actuation means (KA60, KA 70; KA 80);

wherein the control circuit (212) is controllably connected in series with the input circuit (211) between two terminals of a power supply, and the output path (213) is controllably connected between two terminals of the power supply.

13. The signal conversion circuit (113) of claim 12, wherein:

the signal conversion circuit (113) includes a first relay (KA6), a second relay (KA7), and a third relay (KA 8);

the first relay (KA6) comprises an excitation device (KA60), a first normally open switch (KA61), a second normally open switch (KA62) and a normally closed switch (KA 63);

the second relay (KA7) comprises an excitation device (KA70), a first normally closed switch (KA71), a second normally closed switch (KA72) and a normally open switch (KA 73);

the third relay (KA8) comprises an excitation device (KA80), a first normally open switch (KA81), a second normally open switch (KA82), a third normally open switch (KA83) and a normally closed switch (KA 84);

the input circuit (211) comprises a signal input switching circuit (314);

the control circuit (212) comprises a first control path (611) and a second control path (612), the first control path (611) and the second control path (612) being connected in parallel, the parallel circuit of the first control path (611) and the second control path (612) and the signal input switching circuit (314) being controllably connected in series between the two terminals of the power supply;

the first control passage (611) comprising the energizing means (KA60) of the first relay (KA6), the first normally open switch (KA61) of the first relay (KA6), the first normally closed switch (KA71) of the second relay (KA7) and the normally closed switch (KA84) of the third relay (KA8),

wherein in the first control channel (611) the normally closed switch (KA84) of the third relay (KA8) and the first normally open switch (KA61) of the first relay (KA6) are connected in parallel forming a first control parallel circuit (613) and the first control parallel circuit (613), the first normally closed switch (KA71) of second relay (KA7) and the excitation means (KA60) of the first relay (KA6) are connected in series;

the second control path (612) comprising the energizing means (KA70) of the second relay (KA7), the normally closed switch (KA63) of the first relay (KA6), the first normally open switch (KA81) of the third relay (KA8) and the normally open switch (KA73) of the second relay (KA7),

wherein in the second control path (612) the first normally open switch (KA81) of the third relay (KA8) and the normally open switch (KA73) of the second relay (KA7) are connected in parallel forming a second control parallel circuit (614), the normally closed switch (KA63) of first relay (KA6) and the excitation device (KA70) of the second relay (KA7) being connected in series;

the output passage (213) comprises the excitation device (KA80) of the third relay (KA8), the second normally open switch (KA82) of the third relay (KA8), the third normally open switch (KA83) of the third relay (KA8), the second normally closed switch (KA72) of the second relay (KA7) and the second normally open switch (KA62) of the first relay (KA6),

wherein in the output passage (213), the second normally open switch (KA62) of the first relay (KA6) is connected in parallel with the second normally open switch (KA82) of the third relay (KA8) forming an output parallel circuit (615), the second normally closed switch (KA72) of the second relay (KA7) and the excitation device (KA80) of the third relay (KA8) are controllably connected in series between the two ends of the power supply, and the third normally open switch (KA83) of the third relay (KA8) is coupled to the excitation device (KA80) of the third relay (KA8) and provides an output.

14. The signal conversion circuit (113) of claim 12, wherein:

and one period of the second standard signal comprises two pulse signals, the first pulse signal starts the running or operation of the electrical equipment, the second pulse signal stops the running or operation of the electrical equipment, and the running or operation of the electrical equipment is kept between the second pulse signal and the first pulse signal.

15. The signal conversion circuit (113) of claim 14, wherein the leading edge transition is a rising transition and the trailing edge transition is a falling transition, and wherein a high level is between the rising transition and the falling transition.

16. The signal conversion circuit (113) of claim 14, wherein the leading edge transition is a falling transition and the trailing edge transition is a rising transition, with a low level between the falling transition and the rising transition.

17. The signal conversion circuit (113) of claim 14, wherein:

18. The signal conversion circuit (113) of claim 12, wherein:

the excitation device (KA60, KA 70; KA80) is a coil.

19. A control system (110), characterized by:

the control system (110) comprises:

a controller (104);

a signal conversion circuit (113);

an appliance device interface (102); and

an electrical apparatus (101),

wherein:

the controller (104) is connected with the signal conversion circuit (113) so that a second standard signal generated by the controller (104) is input to the signal conversion circuit (113);

the signal conversion circuit (113) converts the second standard signal into a first standard signal, and the signal conversion circuit (113) is connected with the electrical equipment interface (102) and transmits the first standard signal to the electrical equipment interface (102); and is

The electrical equipment (101) is connected with the electrical equipment interface (102) and receives the first standard signal from the electrical equipment interface (102), and the first standard signal is used for operating the electrical equipment (101).

20. The control system (110) of claim 19, wherein:

the control system (110) further comprises a control panel (105), wherein the control panel (105) is connected to the electrical equipment interface (102) and can control the electrical equipment interface (102) to generate a first standard signal, and the first standard signal is used for controlling the operation of the electrical equipment (101).

21. The system according to claim 19 or 20, wherein:

the appliance (101) is a soot cleaner and the operation performed by the appliance (101) is the switching on and off of a washing program.

22. A control system (800), characterized by:

the control system (800) comprises:

a controller (104);

a first signal conversion circuit (103);

a second signal conversion circuit (113);

an appliance device interface (102);

an electrical device (101); and

a control panel (105);

wherein the controller (104) is connected to the first signal conversion circuit (103) and the second signal conversion circuit (113), the first signal conversion circuit (103) and the second signal conversion circuit (113) are both connected to the appliance device interface (102), the appliance device interface (102) is connected to the appliance device (101);

the controller (104) generates a first standard signal and sends the first standard signal to the first signal conversion circuit (103), the first signal conversion circuit (103) converts the first standard signal into a second standard signal and sends the second standard signal to the electrical equipment interface (102), and the electrical equipment (101) receives the second standard signal from the electrical equipment interface (102) to operate according to the second standard signal;

the control panel (105) is connected to the electrical equipment interface (102) to control the electrical equipment interface (102) to generate a second standard signal, the second standard signal generated by the electrical equipment interface (102) is used for controlling the operation of the electrical equipment (101), the second signal conversion circuit (113) receives the second standard signal generated by the electrical equipment interface (102) and converts the received second standard signal into a first standard signal, and the controller (104) receives the first standard signal converted by the second signal conversion circuit (113) to monitor the operation of the electrical equipment (101);

wherein the first signal conversion circuit (103) is a signal conversion circuit (103) according to any of claims 1-8 and the second signal conversion circuit (113) is a signal conversion circuit (113) according to any of claims 12-18.

23. The control system (800) of claim 21, wherein:

24. A control system (900), characterized by:

the control system (900) comprises:

a controller (104);

a first signal conversion circuit (103);

a second signal conversion circuit (113);

an appliance device interface (102);

an electrical device (101); and

a control panel (105);

the controller (104) generates a second standard signal and sends the second standard signal to the second signal conversion circuit (113), the second signal conversion circuit (113) converts the second standard signal into a first standard signal and sends the first standard signal to the electrical equipment interface (102), and the electrical equipment (101) receives the first standard signal from the electrical equipment interface (102) to operate according to the first standard signal;

the control panel (105) is connected to the electrical equipment interface (102) to control the electrical equipment interface (102) to generate a first standard signal, the first standard signal generated by the electrical equipment interface (102) is used for controlling the operation of the electrical equipment (101), the first signal conversion circuit (103) receives the first standard signal generated by the electrical equipment interface (102) and converts the received first standard signal into a second standard signal, and the controller (104) receives the first standard signal converted by the first signal conversion circuit (103) to monitor the operation of the electrical equipment (101);

25. The control system (900) of claim 24, wherein: