TW201814759A - Monitoring module for Solid State Relay and furnace having the same - Google Patents

Abstract

A monitoring module for a Solid State Relay (SSR) configured between a controller and a load is provided. The monitoring module includes an input signal detecting unit, an output current detecting unit, an alarm output unit and a processing unit. The input signal detecting unit is used to detect a control signal from the controller to the SSR for generating a signal detecting result. The output current detecting unit is used to detect an output current from the SSR to the load for generating a current detecting result. The alarm output unit is used to output an alarm signal. The processing unit is used to determine whether the SSR has fault or not according to the signal detecting result and the current detecting result for controlling the alarm output unit to output the alarm signal.

Description

 Monitoring module of solid state relay and heating furnace having the same  

The invention relates to a monitoring module, in particular to a monitoring module of a solid state relay and a heating furnace having the same.

According to the solid state relay (SSR), it has the characteristics of no spark, no noise, fast switching speed, etc. Unlike traditional electromagnetic relays, which are easily damaged during fast ON/OFF cycles, it has gradually replaced traditional electromagnetic relays.

Generally, a solid state relay has an input end and an output end, and the input end and the output end are separated by an optical isolating element, and after the signal is input from the input end, the output end is changed from an open circuit (open circuit) to a short circuit (path) state. In turn, the high-power output current is turned on, but sometimes the load current is too large or the temperature is too high, so that the output of the solid-state relay is always short-circuited or open, and cannot be turned off or on.

However, at present, there is no monitoring module that can be used to monitor the status of the solid state relay in real time and to determine it. In view of this, the inventor has been engaged in the development and design of related products for many years, and feels that the above-mentioned defects can be improved. With painstaking research and the use of academics, the present invention has finally been proposed to rationally and effectively improve the above-mentioned defects.

The main object of the present invention is to provide a monitoring module for a solid state relay and a heating furnace having the same, which can instantly monitor and determine the state of the solid state relay.

In order to achieve the above, the present invention provides a monitoring module for a solid state relay. The solid state relay is disposed between a controller and a load. The monitoring module includes: an input signal detecting unit electrically connected to The solid state relay input end is configured to detect a control signal input by the controller to the input end of the solid state relay, and correspondingly generate a signal detection result; an output current detecting unit is electrically connected to the solid state relay output end, Detecting a current of the output of the solid state relay and correspondingly generating a current detection result; a warning output unit for emitting a fault warning signal; and a processing unit electrically connected to the input signal detecting unit, the output a terminal current detecting unit and the warning output unit; the processing unit is configured to determine the fault of the solid state relay according to the received signal detection result and the current detection result, and control the warning when determining that the solid state relay is faulty The output unit issues the fault warning signal.

In order to achieve the above, the present invention also provides a heating furnace having a heater, a power source for supplying electric power to the heater, and a temperature sense for sensing the temperature of the heater. a detector, a solid state relay connected to the heater and the power source, a monitoring module for monitoring the solid state relay in real time, and a temperature controller for receiving the temperature emitted by the temperature sensor The signal sends a control signal to the solid state relay according to the temperature signal to control the on/off of the solid state relay, so that the power source supplies power to the heater or stops the power supply; wherein the monitoring module comprises: an input signal detecting unit Electrically connected to the input end of the solid state relay for detecting the control signal input by the temperature controller to the input end of the solid state relay, and correspondingly generating a signal detection result; an output current detecting unit electrically connected to the a solid state relay output for detecting the current of the solid state relay output, and correspondingly generating a current detection result; a warning output list And a processing unit electrically connected to the input signal detecting unit, the output current detecting unit, and the warning output unit; the processing unit is configured to detect according to the received signal The measurement result and the current detection result determine the failure of the solid state relay, and when it is determined that the solid state relay is faulty, the warning output unit is controlled to issue the fault warning signal.

The present invention has at least the following advantages: the invention detects the control signal input from the controller to the input end of the solid state relay through the input signal detecting unit, and correspondingly generates a signal detection result, and detects through the output current detecting unit. The current at the output of the solid state relay generates a current detection result, so that the processing unit can immediately judge the fault of the solid state relay according to the received signal detection result and the current detection result, and can immediately notify the solid state relay when the fault occurs.

100‧‧‧Solid relay

101‧‧‧ input

102‧‧‧output

1021, 1022‧‧‧ output contacts

200‧‧‧ controller

300‧‧‧load

400‧‧‧Power source

500‧‧‧temperature sensor

1‧‧‧Monitor module

10‧‧‧Input signal detection unit

20‧‧‧Output current detection unit

30‧‧‧Warning output unit

40‧‧‧Processing unit

50‧‧‧Signal isolation unit

60‧‧‧Output voltage detection unit

70‧‧‧Communication unit

80‧‧‧Power unit

M‧‧‧heating furnace

V1‧‧‧ control signal

I‧‧‧current

V2‧‧‧ voltage

S‧‧‧Fault warning signal

1 is a block diagram (1) of a monitoring module of a solid state relay according to the present invention.

2 is a block diagram (1) of a monitoring module of the present invention.

3 is a judgment table (1) of a monitoring module of the solid state relay of the present invention.

4 is a block diagram (2) of the monitoring module of the present invention.

FIG. 5 is a block diagram (2) of a monitoring module of the solid state relay of the present invention.

FIG. 6 is a block diagram (3) of the monitoring module of the present invention.

Fig. 7 is a judgment table (2) of the monitoring module of the solid state relay of the present invention.

FIG. 8 is a schematic diagram of the monitoring module built in the solid state relay of the present invention.

Figure 9 is a schematic view of a heating furnace of the present invention.

The following is a specific embodiment to explain the embodiment of the "monitoring module of the solid state relay and the heating furnace having the monitoring module" disclosed in the present disclosure. Those skilled in the art can easily disclose the contents disclosed in the present specification. Understand the advantages and effects of this creation. The present invention may be implemented or applied in various other specific embodiments, and various details in the present specification may be made based on different viewpoints and applications, and various modifications and changes may be made without departing from the spirit of the present invention. In addition, the drawings of this creation are for illustrative purposes only and are not stated in terms of actual dimensions. The following embodiments will further explain the related technical content of the present invention, but the disclosure is not intended to limit the technical scope of the present invention.

Referring to FIG. 1 to FIG. 3, the present invention provides a monitoring module for a solid state relay. The solid state relay 100 of the present embodiment is disposed between a controller 200 and a load 300, and the input terminal 101 and the output terminal 102 of the solid state relay 100 are used to connect the controller 200 and the load 300, respectively. In an actual application, the output terminal 102 can have two normally open output contacts 1021, 1022 connected to the power source 400 and the load 300 respectively. At this time, the output state of the output terminal 102 is an open circuit. When there is an input signal, the output state can be A conversion has occurred. For example, the controller 200 can be a temperature controller, and the load 300 can be a heater, but is not limited thereto. The controller 200 is configured to issue a control signal to the input terminal 101 of the solid state relay 100, and when the control signal is true (eg, when the signal is at 3Vdc to 32Vdc, it is true), the output terminal 102 of the solid state relay 100 is shorted (conducted), and When the control signal is false (for example, when the signal is less than 3Vdc, it is false), the output terminal 102 of the solid state relay 100 is open, thereby controlling the short circuit or open circuit of the output end (large power terminal) 102 of the solid state relay 100. Thereby, the power source 400 supplies power to the load 300 or stops supplying power. In order to avoid the failure of the solid state relay 100, the monitoring module 1 of the present embodiment is used to monitor the solid state relay 100 in real time. As shown in FIG. 2, the monitoring module 1 basically includes an input signal detecting unit 10 and an output current. The detecting unit 20, an alert output unit 30, and a processing unit 40. In practical applications, the processing unit 40 may be a micro-controller with built-in preset programs, a digital signal processor (DSP), an application specific integrated circuit (ASIC), and a field programmable gate array (FPGA). ) Control the wafer or hardware circuit components to control each functional unit accordingly. The related structure and operation between the input signal detecting unit 10, the output current detecting unit 20, the warning output unit 30, and the processing unit 40 of the present embodiment will be further described below, and then introduced between other functional units. Interrelationship.

The input signal detecting unit 10 is electrically connected to the processing unit 40 and the input terminal 101 of the solid state relay 100, and the input signal detecting unit 10 is configured to detect the control signal V1 input by the controller 200 to the input terminal 101 of the solid state relay 100, and Corresponding to generate a signal detection result. In an actual application, the input signal detecting unit 10 may be a voltage detector, a voltage comparator, a voltage detecting circuit or a corresponding circuit to detect a voltage corresponding to the control signal, and convert the voltage into a signal detection result. . In an embodiment, the signal detection result may be a high potential signal (logic 1) or a low potential signal (logic 0) and output to the processing unit 40. Moreover, in an embodiment, the signal detection result may be the magnitude of the detected voltage and output to the processing unit 40 for determination.

The output current detecting unit 20 is electrically connected to the processing unit 40 and the output terminal 102 of the solid state relay 100, and the output current detecting unit 20 is configured to detect the current I of the output terminal 102 of the solid state relay 100, and correspondingly generate a current detecting. result. In practical applications, the output current detecting unit 20 can be, for example, a Current-Transformer, a Current-Shunt, a Hall-effect current sensor, a current detector, and a current detecting circuit. Or a corresponding circuit to detect the load current flowing through the load 300 and convert the load current into a current detection result. In an embodiment, the current detection result may be a high potential signal (logic 1) or a low potential signal (logic 0) and output to the processing unit 40. Moreover, in an embodiment, the signal detection result may be the magnitude of the detected current and output to the processing unit 40 for determination.

The warning output unit 30 is electrically connected to the processing unit 40, and the warning output unit 30 is configured to output a fault warning signal S. In practical applications, the alert output unit 30 can be a relay, an open-drain/open-collector output, a voltage output, or a photo-coupler output.

The processing unit 40 is configured to receive the signal detection result and the current detection result, and determine a fault of the solid state relay 100 according to the signal detection result and the current detection result, and control the warning output when determining that the solid state relay 100 is faulty. Unit 30 issues a fault alert signal S.

In detail, as shown in FIG. 3, when the processing unit 40 receives the signal detection result received by the input signal detecting unit 10 as a high potential signal (logic 1), and is received by the output current detecting unit 20, The result of the current detection is a high potential signal (logic 1), and the processing unit 40 determines that the solid state relay 100 is normal and does not issue a fault warning signal S.

The signal detection result received by the input signal detecting unit 10 is a high potential signal (logic 1), and the current detection result received by the output current detecting unit 20 is a low potential signal. (Logic 0), the processing unit 40 determines that the solid state relay 100 is an open circuit fault and issues a fault warning signal S.

The signal detection result received by the input signal detecting unit 10 is a low potential signal (logic 0), and the current detection result received by the output current detecting unit 20 is a high potential signal. (Logic 1), the processing unit 40 judges that the solid state relay 100 is a short circuit fault and issues a fault warning signal S.

The signal detection result received by the input signal detecting unit 10 is a low potential signal (logic 0), and the current detection result received by the output current detecting unit 20 is a low potential signal. (Logic 0), the processing unit 40 determines that the solid state relay 100 is normal and does not issue a fault warning signal S.

In addition, the signal detection result received by the input signal detecting unit 10 of the processing unit 40 is a high potential signal (logic 1), and the current detection result received by the output current detecting unit 20 is a low potential. The signal (logic 0) may also be caused by a load 300 trip or a power source 400 voltage loss.

In addition, in an embodiment, when the processing unit 40 determines that the received detection voltage is true, and the determination is negative according to the magnitude of the received detection current, the processing unit 40 can determine the solid state relay 100 according to the determination. It is an open circuit fault and a fault warning signal S is issued.

Please refer to Figure 4 and match Figure 1. In an embodiment, the monitoring module 1 of the solid state relay may further include a signal isolation unit 50. The signal isolation unit 50 is electrically connected to the processing unit 40 and the output current detecting unit 20, and the signal isolation unit 50 is configured to isolate the current or voltage of the solid state relay output 102 (large power terminal), that is, the signal isolation unit 50 can provide Isolation of the solid state relay output 102 (large power terminal) from other units to avoid damage to other units. If the output current detecting unit 20 is a sensor having an isolation function (for example, a current comparator), the signal isolation unit 50 may be omitted.

Please refer to Figure 5 and Figure 6. In an embodiment, the monitoring module 1 of the solid state relay may further include an output voltage detecting unit 60. The output voltage detecting unit 60 is electrically connected to the processing unit 40 and the output terminal 102 of the solid state relay 100, and the output voltage detecting unit 20 is configured to detect the voltage V2 of the output terminal 102 of the solid state relay 100, and correspondingly generate a voltage detection. result. It can also be said that the output voltage detecting unit 20 detects the presence or absence of the voltage of the power source 400 connected to the output terminal 102 of the solid state relay 100.

The monitoring module 1 of the solid state relay further includes an output voltage detecting unit 60, so that the monitoring module 1 of the solid state relay can make a more detailed judgment.

In detail, as shown in FIG. 7 , when the signal detection result received by the processing unit 40 by the input signal detecting unit 10 is a high potential signal (logic 1), the output current is detected by the output current detecting unit 20 . The current detection result is a high potential signal (logic 1), and the voltage detection result received by the output voltage detecting unit 60 is a high potential signal (logic 1), and the processing unit 40 determines that the solid state relay 100 is Normal, no fault warning signal S will be issued.

When the signal detection result received by the input signal detecting unit 10 is a high potential signal (logic 1), the current detection result received by the output current detecting unit 20 is a low potential signal ( Logic 0), and the voltage detection result received by the output voltage detecting unit 20 is a high potential signal (logic 1), and the processing unit 40 determines that the solid state relay 100 is an open circuit fault, or the load 300 is disconnected, and the fault is issued. Warning signal S.

When the signal detection result received by the input signal detecting unit 10 is a low potential signal (logic 0), the current detection result received by the output current detecting unit 20 is a high potential signal ( The logic 1) and the voltage detection result received by the output voltage detecting unit 60 is a high potential signal (logic 1), and the processing unit 40 determines that the solid state relay 100 is a short circuit fault and issues a fault warning signal S.

When the signal detection result received by the input signal detecting unit 10 is a low potential signal (logic 0), the current detection result received by the output current detecting unit 20 is a low potential signal ( Logic 0), and the voltage detection result received by the output voltage detecting unit 60 is a high potential signal (logic 1), and the processing unit 40 determines that the solid state relay 100 is normal, and does not issue a fault warning signal S. .

When the signal detection result received by the input signal detecting unit 10 is a high potential signal (logic 1), the current detection result received by the output current detecting unit 20 is a high potential signal ( Logic 1), and the voltage detection result received by the output voltage detecting unit 20 is a low potential signal (logic 0), and the processing unit 40 judges the internal component failure of the monitoring module 1 or other faults according to the fault, and issues a fault. Warning signal S.

When the signal detection result received by the input signal detecting unit 10 is a low potential signal (logic 0), the current detection result received by the output current detecting unit 20 is a high potential signal ( Logic 1), and the voltage detection result received by the output voltage detecting unit 60 is a low potential signal (logic 0), and the processing unit 40 judges the internal component failure of the monitoring module 1 or other faults according to the fault, and issues a fault. Warning signal S.

In an embodiment, the output current detecting unit 10 and the output voltage detecting unit 60 of the monitoring module 1 can use a current/voltage detecting component with high precision and pass the calculation capability of the processing unit 40. The monitoring module 1 can also be used as a current/voltage/power measurement and recording module for a wider range of applications.

In an embodiment, the load 300 is a heater, and the aging problem occurs after a period of use, causing a change in the resistance value thereof, thereby causing a change in current and a change in output power, and detecting and alerting through the monitoring module 1 It can be used as a warning or replacement for the performance degradation of the load 300.

The monitoring module 1 of the solid state relay may further include a communication unit 70 (Fig. 6). The communication unit 70 is electrically connected to the processing unit 40, and the communication unit 70 is configured to perform communication to send a fault warning message. In practical applications, the communication unit 30 can be used in communication mode, such as RS-232/485/422 communication, Ethernet communication or wireless communication, and can set the operation parameters of the monitoring module 1 via the communication unit, for example, the monitoring module 1 The number, the condition of the fault warning message, etc. In addition, the communication unit 70 can have a communication isolation function to avoid interference. In addition, the communication unit 70 can also send the status of the solid state relay 100 and the load 300 to form a big data material that meets the requirements of Industry 4.0.

In addition, the monitoring module 1 of the solid state relay may further include a power supply unit 80 (as shown in FIG. 6). The power unit 80 is electrically connected to the processing unit 40, and the power unit 80 is configured to provide power required for the operation of the monitoring module 1. In practical applications, the power can be directly supplied by the communication line or an independent power source.

In an embodiment, as shown in FIG. 8, the monitoring module 1 can be miniaturized and built into the solid state relay 100 to form the solid state relay 100 to form a smart solid state relay with self-failure determination function (smart). SSR). In addition, the monitoring module 1 can also be formed as an external independent module, which is externally attached to the existing solid state relay.

Please refer to Figure 9 and match Figure 1. In an embodiment, the monitoring module 1 can be disposed on a heating furnace M, and the heating furnace M can be a box type furnace heating furnace. The heating furnace M of the present embodiment may be provided with a solid state relay 100, a controller 200, a load 300, a power source 400, and a temperature sensor 500. In this embodiment, the controller 200 is a temperature controller, the load 300 is a heater, the power source 400 is used to supply power to the heater (load 300), and the temperature sensor 500 is used to sense the heating. (load 300) temperature, solid state relay 100 is connected to the heater (load 300) and power source 400, and the monitoring module 1 is used to monitor the solid state relay 100 in real time, and the temperature controller (controller 200) is used to receive the temperature sense The temperature signal sent by the detector 500 sends a control signal to the solid state relay 100 according to the temperature signal, so that the power source 400 supplies power to the heater (load 300) or stops supplying power.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Therefore, the equivalent changes of the present invention and the contents of the drawings are all included in the protection of the present invention. Within the scope, it is combined with Chen Ming.

Claims (13)

 A solid state relay monitoring module is disposed between a controller and a load, the monitoring module includes: an input signal detecting unit electrically connected to the solid state relay input terminal for detecting the The controller inputs a control signal to the input end of the solid state relay, and correspondingly generates a signal detection result; an output current detecting unit is electrically connected to the solid state relay output end for detecting the current of the solid state relay output end, and Corresponding to generate a current detection result; a warning output unit for emitting a fault warning signal; and a processing unit electrically connected to the input signal detection unit, the output current detection unit, and the warning output unit The processing unit is configured to determine the fault of the solid state relay according to the received signal detection result and the current detection result, and control the warning output unit to issue the fault warning signal when determining that the solid state relay is faulty.    The monitoring module of the solid state relay according to claim 1, wherein when the signal detection result received by the processing unit is a low potential signal, and the received current detection result is a high potential signal, the processing is The unit accordingly determines that the solid state relay is short-circuited.    The monitoring module of the solid state relay according to claim 1, wherein when the signal detection result received by the processing unit is a high potential signal, and the received current detection result is a low potential signal, the processing is Based on this, the unit judges that the solid state relay is open.    The monitoring module of the solid state relay of claim 1, wherein the monitoring module further comprises a signal isolation unit electrically connected to the processing unit for isolating the current or voltage at the output of the solid state relay.    The monitoring module of the solid state relay of claim 1, wherein the monitoring module further comprises an output voltage detecting unit, wherein the output voltage detecting unit is electrically connected to the processing unit and the solid state relay output end, The voltage of the output of the solid state relay is detected, and a voltage detection result is generated correspondingly.    The monitoring module of the solid state relay according to claim 5, wherein the processing unit is further configured to determine the fault of the solid state relay according to the received voltage detection result.    The monitoring module of the solid state relay according to claim 6, wherein the signal detection result received by the processing unit is a high potential signal, the received current detection result is a low potential signal, and the received signal is received. The voltage detection result is a high potential signal, and the processing unit judges the solid state relay open circuit fault accordingly.    The monitoring module of the solid state relay according to claim 6, wherein the signal detection result received by the processing unit is a low potential signal, the received current detection result is a high potential signal, and the received signal is received. The voltage detection result is a high potential signal, and the processing unit determines the solid state relay short circuit fault accordingly.    The monitoring module of the solid state relay of claim 1, wherein the monitoring module further comprises a communication unit electrically connected to the processing unit for communication.    The monitoring module of the solid state relay of claim 1, wherein the monitoring module further comprises a power supply unit electrically connected to the processing unit for providing power required for operation of the monitoring module.    The monitoring module of the solid state relay according to claim 1, wherein the monitoring module is built in the solid state relay, so that the solid state relay forms an intelligent solid state relay with a self-failure determination function.    The monitoring module of the solid state relay according to claim 1, wherein the load is a heater, and the monitoring module is further configured to detect a change in current and a change in output power of the load, and determine an open circuit of the load according to the load. Or deteriorated to give a warning signal.    A heating furnace having a heater, a power source for supplying electric power to the heater, a temperature sensor for sensing the temperature of the heater, a battery connected to the heater, and the electric power a source solid state relay, a monitoring module for monitoring the solid state relay in real time, and a temperature controller for receiving a temperature signal from the temperature sensor and issuing a control signal to the solid state according to the temperature signal The relay controls the on/off of the solid state relay to enable the power source to supply or stop the power supply to the heater; wherein the monitoring module comprises: an input signal detecting unit electrically connected to the solid state relay input end for Detecting the control signal input by the temperature controller to the input end of the solid state relay, and correspondingly generating a signal detection result; an output current detecting unit electrically connected to the output end of the solid state relay for detecting the solid state relay The current at the output end, and correspondingly generates a current detection result; a warning output unit for issuing a fault warning signal; and a processing The signal is electrically connected to the input signal detecting unit, the output current detecting unit, and the warning output unit; the processing unit is configured to determine the solid state relay according to the received signal detection result and the current detection result The fault is detected, and when the solid state relay is faulty, the warning output unit is controlled to issue the fault warning signal.