CN115494785A - Signal isolation device and signal control system - Google Patents

Abstract

The invention discloses a signal isolation device and a signal control system. The signal isolation device includes: an input module, a control module and an output module; the input module is used to receive an initial control signal sent by a first device and generate a plurality of first control signals sent to the control module; the control module includes a plurality of solid state relays, and each solid state relay includes a plurality of target contacts, which are used to control the conduction or disconnection of the corresponding first control signal, and turn the first control signal The signal is sent to the output module; the output module is used to generate a second control signal corresponding to the first control signal and send it to the second device. The present invention realizes complex multi-channel signal control of multiple on-site output devices controlled by external control equipment and multiple protection processes for signals, greatly improves the quantity and quality of signals, and also realizes the active and active protection of signal isolation devices. Passive switch between two working modes.

Description

Signal isolation device and signal control system

technical field

The invention relates to the field of signal processing, in particular to a signal isolation device and a signal control system.

Background technique

In the control system, it is necessary to realize the on-off control of the output signal of the field output device by sending a control signal from the external control device. At present, most of the isolation modules with relays on the market are used to realize the on-off control function.

However, most of the isolation modules currently on the market use conventional relays with a single-channel design, and the number of signals is small, so the function is single, and it is impossible to divide the input control signal into multiple outputs, and then realize the external control equipment. Complex multi-channel signal control of one device controlling multiple devices.

Contents of the invention

The technical problem to be solved by the present invention is to provide a signal isolation device and a signal control system in order to overcome the defect of a small number of signals caused by the single-channel design of the conventional relay used in the isolation module in the prior art.

The present invention solves the above technical problems through the following technical solutions:

In a first aspect, the present invention provides a signal isolation device, the signal isolation device includes: an input module, a control module and an output module, the input module and the output module are respectively electrically connected to the control module;

An input module, configured to receive an initial control signal sent by the first device, generate a plurality of first control signals according to the initial control signal and send them to the control module;

A control module, the control module includes a plurality of solid state relays, each of which includes a plurality of target contacts, and each of the solid state relays controls the conduction of the corresponding first control signal according to the target contacts on or off, and send the first control signal to the output module in the on state;

an output module, configured to generate a second control signal corresponding to the first control signal, and send the second control signal to a second device.

Preferably, the signal isolation device further includes a conversion module, the conversion module is electrically connected to the input module;

The conversion module is used to switch the initial control signal into an active signal or a passive signal.

Preferably, the conversion module includes in-line pin headers.

Preferably, the input module includes a first alarm unit;

The first alarm unit is configured to send a first alarm signal when the first device is disconnected from the input module;

and / or,

The output module includes a second alarm unit;

The second alarm unit is configured to send a second alarm signal when the output module is disconnected from the second device.

Preferably, the input module further includes a first protection unit and a first monitoring unit, and the first protection unit is electrically connected to the first monitoring unit;

The first protection unit is configured to receive the initial control signal, perform first preprocessing on the initial control signal, and send the generated first control signal to the control module; the first The preprocessing includes at least one of overcurrent protection processing, overvoltage protection processing and filter protection processing;

The first monitoring unit is configured to monitor the conduction relationship between the input module and the control module.

Preferably, the output module further includes a second protection unit and a second monitoring unit, and the second protection unit is electrically connected to the second monitoring unit;

The second protection unit is configured to perform second preprocessing on the first control signal, and send the generated second control signal to the second device; the second preprocessing is TVS protection processing ;

The second monitoring unit is configured to monitor the conduction relationship between the control module and the output module.

Preferably, the first protection unit includes a current limiting resistor, and the current limiting resistor is used for performing overcurrent protection processing on the initial control signal;

and / or,

The first protection unit includes a voltage dividing resistor, and the voltage dividing resistor is used for performing overvoltage protection processing on the initial control signal.

Preferably, the first monitoring unit includes a first indicator light, and the first indicator light is electrically connected to the control module.

Preferably, the second monitoring unit includes a second indicator light, and the second indicator light is electrically connected to the control module.

In a second aspect, the present invention provides a signal control system, the control system comprising: a first device, a second device, and the signal isolation device as described in the first aspect;

The first device and the second device are respectively communicatively connected to the signal isolation device;

The first device is configured to send an initial control signal to the signal isolation device;

The signal isolating device is configured to generate a first control signal according to the initial control signal, and control the on or off of the first control signal, and generate a second control signal based on the first control signal in the on state. A second control signal is sent to the second device.

The positive progress effect of the present invention is: the present invention discloses a signal isolation device and a signal control system, the signal isolation device includes: an input module, a control module and an output module; the input module is used to receive the initial control signal sent by the first device And generate a plurality of first control signals and send them to the control module; the control module includes a plurality of solid-state relays, each solid-state relay includes a plurality of target contacts, which are used to control the conduction or disconnection of the corresponding first control signal, and When turned on, the first control signal is sent to the output module; the output module is used to generate a second control signal corresponding to the first control signal and send it to the second device. The present invention realizes complex multi-channel signal control of multiple on-site output devices controlled by external control equipment and multiple protection processes for signals, greatly improves the quantity and quality of signals, and also realizes the active and active protection of signal isolation devices. Passive switch between two working modes.

Description of drawings

FIG. 1 is a block diagram of a signal isolation device according to Embodiment 1 of the present invention.

Fig. 2 is an application example diagram of the signal isolation device according to Embodiment 1 of the present invention.

FIG. 3 is a schematic structural diagram of a signal control system according to Embodiment 2 of the present invention.

detailed description

The present invention is further illustrated below by means of examples, but the present invention is not limited to the scope of the examples.

Example 1

This embodiment provides a signal isolation device 1, as shown in Figure 1, the signal isolation device 1 includes: an input module 11, a control module 12 and an output module 13, the input module 11 and the output module 13 are electrically connected to the control module 12 respectively .

The input module 11 is configured to receive an initial control signal sent by the first device, generate a plurality of first control signals according to the initial control signal and send them to the control module 12 .

The control module 12, the control module 12 includes a plurality of solid state relays 121, each solid state relay 121 includes a plurality of target contacts, and each solid state relay 121 controls the conduction or disconnection of the corresponding first control signal according to the target contacts, And send the first control signal to the output module 13 in the on state. Wherein, as shown in FIG. 1 , this embodiment takes two solid state relays 121 as an example, that is, the control module 12 includes two solid state relays 121 .

The output module 13 is configured to generate a second control signal corresponding to the first control signal, and send the second control signal to the second device.

Specifically, the first device in this embodiment can be selected as a control device or control system for actually issuing commands, and the second device can be various civil devices or nuclear power devices, which can be selected according to actual application requirements. The solid-state relay 121 in this embodiment can choose to adopt optocoupler relay, there are multiple target contacts in each optocoupler relay, and when each target contact is closed, it means that there is a channel in the optocoupler relay that is in a conduction state. When the target contacts are closed at the same time, it means that multiple channels in the optocoupler relay are in the conduction state at the same time. In this embodiment, the circuit design of one channel of initial control signal is divided into multiple circuits, so that the input signal can control multiple signals at the external output terminal. At the same time, an independent optocoupler relay is used to ensure the independence of each signal channel. It also reduces the difficulty of later maintenance.

As shown in FIG. 1 , the signal isolation device further includes a conversion module 14 , and the conversion module 14 is electrically connected to the input module 11 .

The converting module 14 is configured to switch the initial control signal into an active signal or a passive signal.

As shown in FIG. 1 , the conversion module 14 includes an in-line pin header 141 .

Specifically, in this embodiment, the signal isolation device is configured with two optional signal source modes, active and passive, and the two modes can be switched by the conversion module 14 . The in-line pin header 141 can use two 3PIN in-line pin headers and an external power supply to control the signal source. When the in-line pin header 141 is connected to the power supply device, the signal source is an active signal; when the in-line pin header 141 is not connected to the external power supply When the device is connected and the in-line pin header 141 is shorted, the signal source is a passive signal. The two modes can be switched according to the actual characteristics of the on-site device during specific use. In actual application, the 3PIN in-line pin header is a jumper, that is, the signal isolation device is equipped with two sets of jumpers. According to whether power supply is required in actual use, the two modes of active and passive can be switched and used independently.

As shown in FIG. 1 , the input module 11 includes a first alarm unit 111 .

The first alarm unit 111 is configured to send out a first alarm signal when the first device is disconnected from the input module 11 .

As shown in FIG. 1 , the output module 13 includes a second alarm unit 131 .

The second alarm unit 131 is configured to send a second alarm signal when the output module 13 is disconnected from the second device.

Specifically, the first alarm unit 111 is used to monitor the signal conduction relationship between the first device and the input module 11, and sends a first alarm signal when the signal is disconnected; the second alarm unit 131 is used to monitor the output module 13 and the The signal conduction relationship between the second equipment, and a second alarm signal is issued when the signal is disconnected. This method helps the on-site operators to troubleshoot and repair according to the actual alarm signal sent.

As shown in FIG. 1 , the input module 11 further includes a first protection unit 112 and a first monitoring unit 113 , and the first protection unit 112 and the first monitoring unit 113 are electrically connected.

The first protection unit 112 is configured to receive the initial control signal, perform first preprocessing on the initial control signal, and send the generated first control signal to the control module 12; the first preprocessing includes overcurrent protection processing, overvoltage At least one of protection processing and filtering protection processing.

The first monitoring unit 113 is configured to monitor the conduction relationship between the input module 11 and the control module 12 .

Specifically, the input module 11 is electrically connected to the first device, and is used to receive the initial control signal sent by the first device, and after the first preprocessing in the first protection unit 112, the first control signal is generated and entered into the solid state relay 121. At the input end, the conduction relationship between the first protection unit 112 and the solid state relay 121 can be monitored through the first monitoring unit 113 . Wherein, the first preprocessing in the first protection unit 112 is mainly to protect the initial control signal, and generate the first control signal after performing protection processing such as overcurrent protection processing, overvoltage protection processing, and filter protection processing on the initial control signal. , greatly improving the quality and stability of the first control signal.

As shown in FIG. 1 , the output module 13 further includes a second protection unit 132 and a second monitoring unit 133 , and the second protection unit 132 and the second monitoring unit 133 are electrically connected.

The second protection unit 132 is configured to perform second preprocessing on the first control signal, and send the generated second control signal to the second device; the second preprocessing is TVS protection processing. Among them, TVS (Transient Voltage Suppressor) protection processing, that is, transient suppression protection processing.

The second monitoring unit 133 is configured to monitor the conduction relationship between the control module 12 and the output module 13 .

Specifically, the solid-state relay 121 in the control module 12 is used as an interface to control the on and off of the first control signal. When a target contact in a solid-state relay 121 is closed, that is, there is a channel in the solid-state relay 121 is turned on, the solid state relay 121 sends the first control signal to the input module 11, and the first control signal undergoes the second preprocessing in the second protection unit 132 in the output module 13 to generate a second control signal and send it to the second device , the second monitoring unit 133 in the output module 13 can monitor the conduction relationship between the second protection unit 132 and the second device, that is, the on-off of the second device can be controlled by the initial control signal sent by the first device. Wherein, the second preprocessing in the second protection unit 132 is mainly to protect the first control signal, and the second control signal is generated after the transient suppression protection processing is performed on the first initial signal, which greatly improves the second control signal. quality and stability.

The first protection unit 112 includes a current limiting resistor, which is used for performing overcurrent protection processing on the initial control signal.

The first protection unit 112 includes a voltage dividing resistor for performing overvoltage protection processing on the initial control signal.

Specifically, since the withstand voltage value of the optocoupler relay used is relatively low, the initial control signal sent to the input module needs to be subjected to over-current protection processing and over-voltage protection processing, so a current-limiting resistor is set in the first protection unit 112 And voltage divider resistors, in actual engineering applications, use resistors with different resistance values and numbers for matching according to the actual threshold.

The first monitoring unit 113 includes a first indicator light, and the first indicator light is electrically connected to the control module 12 .

The second monitoring unit 133 includes a second indicator light, and the second indicator light is electrically connected to the control module 12 .

In an optional embodiment, the solid state relay 121 is used as the interface, the part in front of the input end of the solid state relay 121 is used as the input end of the isolating device, and the part behind the output end of the solid state relay 121 is used as the output end of the isolating device, Both the input end and the output end are equipped with protection components, which are used to ensure the normal operation of the input end and output circuits, that is, the first protection unit 112 is equipped with an input protection circuit 1121 for performing first preprocessing on the initial control signal. The second protection unit 132 is configured with an output protection circuit 1321 for performing second preprocessing on the first control signal.

In an optional implementation manner, as shown in FIG. 2, the first monitoring unit 113 includes a first indicator light 1131, and the first protection unit 112 includes an input protection circuit 1121 for performing first preprocessing on the initial control signal, The first indicator light 1131 is electrically connected to the input protection circuit 1121 and the solid-state relay 121 respectively, and the conduction relationship between the input protection circuit 1121 and the solid-state relay 121 is judged by the bright and dark state of the first indicator light 1131. When it is turned on, The first indicator light 1131 is on, and when it is turned off, the first indicator light 1131 is not on. The number of first indicator lights 1131 corresponds to the number of solid state relays 121 , and each first indicator light 1131 is used to monitor the conduction relationship of a channel between the input protection circuit 1121 and a solid state relay 121 . This method realizes independent monitoring of individual channels, which makes it easy to judge when a fault occurs later, and reduces the difficulty of later maintenance.

In an optional implementation manner, as shown in FIG. 2, the second monitoring unit 133 includes a second indicator light 1331, and the second protection unit 132 includes an output protection circuit 1321 for performing second preprocessing on the first control signal. , the second indicator light 1331 is electrically connected to the solid state relay 121 and the output protection circuit 1321 respectively, and the conduction relationship between the solid state relay 121 and the output protection circuit 1321 is judged by the light and dark state of the second indicator light. The second indicator light 1331 is on, and when it is turned off, the second indicator light 1331 is not on. Wherein, the number of the second indicator lights 1331 corresponds to the number of target contacts in the solid state relay 121, and each second indicator light 1331 is used to monitor the conduction of a channel between a solid state relay 121 and the output protection circuit 1321 relationship, when there are multiple target contacts in one solid state relay 121, that is, the solid state relay 121 can control the conduction or disconnection of multiple channels. This method realizes independent monitoring of individual channels, which makes it easy to judge when a fault occurs later, and reduces the difficulty of later maintenance.

In an optional implementation manner, all devices used in this embodiment can be configured nationwide.

This embodiment provides a signal isolation device, the signal isolation device receives the initial control signal sent by the first device, and preprocesses the initial control signal to generate a plurality of first control signals, and controls the first control signal through a plurality of solid state relays. The control signal is turned on or off, and the turned-on first control signal is preprocessed to generate a corresponding number of second control signals and sent to the second device. The signal isolation device provided in this embodiment realizes the complex multi-channel signal control of the external control equipment to the on-site output equipment and performs multiple protection processing on the signal, which greatly improves the quantity and quality of the signal, and also realizes Switch between active and passive working modes of the signal isolation device.

Example 2

This embodiment provides a signal control system. As shown in FIG. 3 , the signal control system includes: a first device 2 , a second device 3 and the signal isolation device 1 in Embodiment 1.

Specifically, the first device 2 in this embodiment can be selected as a control device or control system for actually issuing commands, and the second device 3 can be various civilian devices or nuclear power devices, etc., and can be implemented according to actual engineering application requirements. choose.

The first device 2 and the second device 3 are communicatively connected to the signal isolation device 1 respectively.

The first device 2 is configured to send an initial control signal to the isolation device 1 .

The signal isolation device 1 is used to generate the first control signal according to the initial control signal, and control the on or off of the first control signal, and send the second control signal generated based on the first control signal to the second equipment3.

Specifically, the signal isolation device 1 generates a plurality of first control signals by receiving the initial control signal sent by the first device 2, and performs first preprocessing on the initial control signal, and controls the conduction of the first control signal through a plurality of solid state relays. Or disconnect, perform second preprocessing on the turned-on first control signal to generate a corresponding number of second control signals and send them to the second device 3 . Wherein, the initial control signal includes an active signal and a passive signal; the first pre-processing includes at least one of over-current protection processing, over-voltage protection processing and filter protection processing; the second pre-processing is TVS protection processing.

This embodiment provides a signal control system. By communicating the signal isolation device with the first device and the second device respectively, the signal control system implements the first device by using different numbers of solid-state relays in the signal isolation device. The complex multi-channel signal control of the second device is controlled by one control, while ensuring the independence of each signal channel, which greatly increases the number of signals.

Although the specific implementation of the present invention has been described above, those skilled in the art should understand that this is only an example, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims (10)

1. A signal isolation apparatus, comprising: the device comprises an input module, a control module and an output module, wherein the input module and the output module are respectively and electrically connected with the control module;

the input module is used for receiving an initial control signal sent by first equipment, generating a plurality of first control signals according to the initial control signal and sending the first control signals to the control module;

the control module comprises a plurality of solid-state relays, each solid-state relay comprises a plurality of target contacts, and each solid-state relay controls the corresponding first control signal to be switched on or off according to the target contacts and sends the first control signal to the output module in a switching-on state;

and the output module is used for generating a second control signal corresponding to the first control signal and sending the second control signal to second equipment.

2. The signal isolation apparatus of claim 1, further comprising a conversion module electrically connected to the input module;

the conversion module is used for switching the initial control signal into an active signal or a passive signal.

3. The signal isolation device of claim 2, wherein the conversion module comprises a straight pin header.

4. The signal isolation device of claim 1, wherein the input module comprises a first alarm unit;

the first alarm unit is used for sending out a first alarm signal when the first equipment is disconnected with the input module;

and/or the presence of a gas in the gas,

the output module comprises a second alarm unit;

and the second alarm unit is used for sending out a second alarm signal when the output module is disconnected with the second equipment.

5. The signal isolation device of claim 1, wherein the input module further comprises a first protection unit and a first monitoring unit, the first protection unit and the first monitoring unit being electrically connected;

the first protection unit is used for receiving the initial control signal, performing first preprocessing on the initial control signal and sending the generated first control signal to the control module; the first pretreatment comprises at least one of overcurrent protection treatment, overvoltage protection treatment and filtering protection treatment;

the first monitoring unit is used for monitoring the conduction relation between the input module and the control module.

6. The signal isolation apparatus of claim 1, wherein the output module further comprises a second protection unit and a second monitoring unit, the second protection unit and the second monitoring unit being electrically connected;

the second protection unit is used for carrying out second preprocessing on the first control signal and sending the generated second control signal to the second equipment; the second pretreatment is TVS protection treatment;

and the second monitoring unit is used for monitoring the conduction relation between the control module and the output module.

7. The signal isolation device of claim 5, wherein the first protection unit comprises a current limiting resistor, the current limiting resistor is used for performing an over-current protection process on the initial control signal;

and/or the presence of a gas in the gas,

the first protection unit comprises a divider resistor, and the divider resistor is used for performing overvoltage protection processing on the initial control signal.

8. The signal isolation device of claim 5, wherein the first monitoring unit comprises a first indicator light, the first indicator light being electrically connected to the control module.

9. The signal isolation device of claim 6, wherein the second monitoring unit comprises a second indicator light, the second indicator light being electrically connected to the control module.

10. A signal control system, the control system comprising: a first device, a second device and a signal isolation apparatus as claimed in any one of claims 1 to 9;

the first equipment and the second equipment are respectively in communication connection with the signal isolation device;

the first device is used for sending an initial control signal to the signal isolation device;

the signal isolation device is used for generating a first control signal according to the initial control signal, controlling the first control signal to be switched on or off, and generating a second control signal based on the first control signal and sending the second control signal to the second equipment in a switching-on state.

Images