CN115754700A - Isolation switching value detection method based on network transformer and integrated circuit - Google Patents
Isolation switching value detection method based on network transformer and integrated circuit Download PDFInfo
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Abstract
The invention discloses a method for detecting an isolation switching value based on a network transformer and an integrated circuit, wherein the method comprises the following steps: the output pin of the MCU control unit module outputs an excitation pulse signal; the excitation pulse signal is input to a primary network transformer and outputs a first transformation pulse through transformation; the first transformation pulse is input to a secondary network transformer and outputs a second transformation pulse through transformation; the second voltage transformation pulse driving signal amplifier module outputs a first characteristic pulse signal through pulse amplification; and the first characteristic pulse signal is input to the measuring unit module for detection, and the state of the to-be-detected isolating switch quantity is judged, wherein the to-be-detected isolating switch module is arranged between the primary network transformer module and the secondary network transformer module.
Description
Technical Field
The invention relates to the technical field of industrial automation, in particular to a method for detecting an isolation switching value based on a network transformer and an integrated circuit.
Background
In the field of industrial automation, an isolating switch is mainly used for switching on and off a circuit, plays a role in isolating voltage and is important equipment for ensuring the safe operation of a power system. Although an isolating switch generally has an auxiliary switch positioning function based on a mechanical principle, a large number of signal interfaces using electrical isolating switch quantity detection exist, in the current switching quantity input (DI) scheme, DI switch signal detection is not isolated and requires a power supply, which increases cost, power consumption and volume, and meanwhile in the conventional detection scheme, when a plurality of devices need to detect the same switch, due to inconsistent voltage in DI input devices, the devices cannot be connected in parallel with other switch signal detection devices.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a method and an integrated circuit for detecting an isolated switching value based on a network transformer.
In order to achieve the above object, the present invention provides a method for detecting an isolation switching value based on a network transformer, the method comprising: the output pin of the MCU control unit module outputs an excitation pulse signal; the excitation pulse signal is input to a primary network transformer and outputs a first transformation pulse through transformation; the first transformation pulse is input to a secondary network transformer, and a second transformation pulse is output after transformation; the second voltage transformation pulse driving signal amplifier module outputs a first characteristic pulse signal through pulse amplification; and the first characteristic pulse signal is input to the measuring unit module for detection, and the state of the to-be-detected isolating switch quantity is judged, wherein the to-be-detected isolating switch module is arranged between the primary network transformer module and the secondary network transformer module.
Preferably, before the excitation pulse signal is input to the primary network transformer and the first transformation pulse is output through transformation, the method further comprises:
the excitation pulse signal is subjected to signal enhancement through the first impedance matching circuit module and then output to the primary network transformer.
Preferably, before the first transforming pulse is input to the secondary network transformer and the second transforming pulse is output through transformation, the method comprises the following steps:
the first transformation pulse filters out direct current low-frequency signals and interference signals through the first filter circuit module and then outputs the direct current low-frequency signals and the interference signals to the secondary network transformer.
Preferably, when at least two measuring unit modules are required to be connected in parallel to detect the state of the same to-be-detected isolating switch quantity, two ends of the to-be-detected isolating switch module are connected with the input side of the optocoupler module, wherein the optocoupler module comprises an isolating power supply, an optocoupler and a current limiting circuit module, a first pin on the input side of the optocoupler is connected with the isolating power supply for supplying power, and a second pin on the input side of the optocoupler is connected with the current limiting circuit module.
Preferably, when the to-be-detected isolating switch module is in an open circuit state, the current of the isolating power supply forms a loop through the optical coupler, the current limiting circuit module, the primary network transformer and the first filter circuit module;
and the impedance value of the current limiting circuit module is larger than the impedance value which can be detected by the network transformer, and after the parallel connection, the states of detecting the same to-be-detected isolating switch quantity are not influenced mutually.
An integrated circuit for detecting the isolation switch quantity based on a network transformer comprises a network transformer module and an isolation switch module to be detected which are electrically connected with each other, wherein the network transformer module comprises a primary network transformer, a secondary network transformer and a signal amplifier module;
the second input pin of the primary network transformer inputs an excitation pulse signal, the first end of the to-be-detected isolating switch module is connected with the fourth output pin of the primary network transformer, the second end of the to-be-detected isolating switch module is connected with the first input pin of the secondary network transformer, the third output pin of the primary network transformer is connected with the second input pin of the secondary network transformer, the fourth output pin of the secondary network transformer is connected with the input end of the signal amplifier module, the output end of the signal amplifier module outputs a first characteristic pulse signal, and the integrated circuit executes the steps of the method.
Preferably, the network transformer module further comprises a first filter circuit module, and the primary network transformer and the secondary network transformer are connected through the first filter circuit module.
Preferably, the first filter circuit module includes at least one first capacitor and at least one fourth resistor, a first end of the first capacitor is connected to the third output pin of the primary network transformer, a second end of the first capacitor is connected to a second end of the fourth resistor and the second input pin of the secondary network transformer, and a first end of the fourth resistor is connected to the first input pin of the secondary network transformer.
Preferably, the integrated circuit component further includes an MCU control unit module and a first impedance matching circuit module, and the MCU control unit module outputs an excitation pulse signal to the second input pin of the primary network transformer through the first impedance matching circuit module.
Preferably, the signal amplifier module includes a transistor, at least one second resistor, at least one second capacitor, at least one third resistor, and at least one third capacitor, a base of the transistor is connected to a fourth output pin of the secondary network transformer, a collector of the transistor outputs a first characteristic pulse signal, a first end of the second resistor is connected to the fourth output pin of the secondary network transformer module, a second end of the second resistor is connected to the first end of the second capacitor and the base of the transistor, the collector of the transistor is connected to the base by pulling up the third resistor, a second end of the second capacitor is grounded, a first end of the third capacitor is connected to the collector of the transistor, and a second end of the third capacitor is connected to an emitter of the transistor and grounded.
Compared with the prior art, the invention has the beneficial effects that:
1. the method for detecting the isolation switching value based on the network transformer comprises the following steps: the output pin of the MCU control unit module outputs an excitation pulse signal; the excitation pulse signal is input to a primary network transformer and outputs a first transformation pulse through transformation; the first transformation pulse is input to a secondary network transformer, and a second transformation pulse is output after transformation; the second voltage transformation pulse driving signal amplifier module outputs a first characteristic pulse signal through pulse amplification; the first characteristic pulse signal is input to the measuring unit module for detection, and the state of the to-be-detected isolating switch quantity is judged, wherein the to-be-detected isolating switch module is arranged between the primary network transformer module and the secondary network transformer module, so that isolated DI switch signal detection is realized, the cost, the power consumption and the volume are reduced, meanwhile, the switch signal detection is isolated, an isolation power supply is not needed at the input side, and the to-be-detected isolating switch quantity can be connected with other switch signal detection equipment in parallel, and the implementation method is to use characteristic signal pulses.
2. An integrated circuit is designed by using the method for detecting the isolation switching value based on the network transformer, and the integrated circuit is applied and packaged into a component product, so that a miniaturized component functional unit is realized.
3. When at least two measuring unit modules are required to be connected in parallel to detect the state of the same to-be-detected isolating switch quantity, two ends of the to-be-detected isolating switch module are connected with the input side of an optocoupler module, wherein the optocoupler module comprises an isolating power supply, an optocoupler and a current limiting circuit module, a first pin at the input side of the optocoupler is connected with an isolating power supply for supplying power, a second pin at the input side of the optocoupler is connected with the current limiting circuit module, and when the to-be-detected isolating switch module is in an open circuit state, the current of the isolating power supply forms a loop through the optocoupler, the current limiting circuit module, a primary network transformer and a first filter circuit module; and the impedance value of the current-limiting circuit module is larger than the impedance value which can be detected by the network transformer, after the parallel connection, the states of detecting the same to-be-detected isolating switch quantity are not influenced mutually, and the characteristic signal pulse can be connected with other switch signal detection equipment in parallel without influencing mutually.
Drawings
In order to more clearly illustrate the solution of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive labor.
Fig. 1 is a schematic flow chart of a first embodiment of a method for detecting an isolation switching value based on a network transformer;
FIG. 2 is a schematic diagram of an integrated circuit for detecting the isolated switching value based on a network transformer;
FIG. 3 is a schematic diagram of the structure of the network transformer-based isolation switching value detection integrated circuit;
FIG. 4 is a schematic diagram of a multi-point parallel circuit structure for detecting the amount of isolation switching based on a network transformer;
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The terms "comprising" and "having," and any variations thereof, in the description and claims of this invention and the description of the above figures, are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of the present invention or in the foregoing drawings are used for distinguishing between different objects and not for describing a particular sequential order. In the description and claims of the present invention or the drawings, directional terms such as "upper", "lower", "left", "right", "front", "rear", "side", and the like are used for relative positional description of the drawings, and are not used to describe a specific order of actual products.
The first embodiment is as follows:
referring to fig. 1, fig. 1 is a schematic flow chart of a first embodiment of a method for detecting an isolation switching value based on a network transformer according to the present invention, and the first embodiment of the present invention provides a method for detecting an isolation switching value based on a network transformer, which is characterized in that: the method comprises the following steps:
step S100, an output pin of the MCU control unit module outputs an excitation pulse signal;
the MCU control unit module comprises an output pin, when the state of the isolation switching value input (DI) needs to be detected, an excitation PULSE signal DI _ PULSE needs to be output at the output pin of the MCU control unit module, and it needs to be noted that the MCU control unit module comprises a single chip microcomputer, and a person skilled in the art can adopt any micro control unit according to the requirement of an actual product, and the MCU control unit is not limited and described herein.
Step S200, inputting the excitation pulse signal to a primary network transformer, and outputting a first transformation pulse through transformation;
before the excitation pulse signal is input to the primary network transformer and is transformed to output the first transformation pulse, the excitation pulse signal needs to be subjected to signal enhancement through the first impedance matching circuit module and then is output to the primary network transformer.
Further, the first impedance matching circuit module of the first embodiment preferably uses at least one first resistor, and specifically, the excitation pulse signal is subjected to signal enhancement by the first resistor and then output to the primary network transformer. In the first embodiment, a plurality of first resistors may also be connected in series or in parallel, which is not limited herein, and the electrical effect of the first resistor is the same as that of only one first resistor, that is, the resistance of only one first resistor is the same as that of the plurality of first resistors connected in series or in parallel.
Step S300, inputting the first transformation pulse to a secondary network transformer, and outputting a second transformation pulse through transformation;
wherein, still include before the first vary voltage pulse is input to secondary network transformer and is passed through the second vary voltage pulse of vary voltage output: the first transformation pulse needs to pass through the first filter circuit module to filter out a direct current low-frequency signal and an interference signal, and then is output to the secondary network transformer, namely, the primary network transformer and the secondary network transformer need to be isolated.
Step S400, the second voltage transformation pulse driving signal amplifier module outputs a first characteristic pulse signal through pulse amplification;
since there is signal attenuation after the excitation pulse signal is respectively transformed by the two stages of the primary network transformer and the secondary network transformer, the pulse needs to be amplified by the signal amplifier module to obtain the output first characteristic pulse signal.
Step S500, inputting the first characteristic pulse signal to a measuring unit module for detection, and judging the state of the to-be-detected isolating switch quantity, wherein a to-be-detected isolating switch module is arranged between the primary network transformer module and the secondary network transformer module, and preferably, the to-be-detected isolating switch module is a to-be-detected isolating switch.
If the to-be-detected isolating switch is closed, a short excitation PULSE signal DI _ PULSE is sent at an output pin of the MCU control unit module, the excitation PULSE signal DI _ PULSE passes through the primary network transformer, the first filter circuit module, the secondary network transformer and the driving signal amplifier module to send a first characteristic PULSE signal, and the measuring unit module can detect the first characteristic PULSE signal DI _ IN at the output end of the signal amplifier module.
Therefore, by using the method for detecting the isolation switching value based on the network transformer, isolated DI switching signal detection is realized, and the cost, the power consumption and the volume are reduced.
Example two:
referring to fig. 2, based on the method of the first embodiment, a second embodiment of the present invention provides an isolation switching value detection integrated circuit based on a network transformer, which includes a network transformer module and an isolation switch module S1 to be detected, the network transformer module includes a primary network transformer U1, a secondary network transformer U2 and a signal amplifier module, the excitation PULSE signal DI _ PULSE is input to a second input pin of the primary network transformer U1, a first end of the isolation switch module S1 to be detected is connected to a fourth output pin of the primary network transformer U1, a second end of the isolation switch module S1 to be detected is connected to a first input pin of the secondary network transformer U2, a third output pin of the primary network transformer U1 is connected to a second input pin of the secondary network transformer U2, a fourth output pin of the secondary network transformer U2 is connected to an input end of the signal amplifier module, an output end of the signal amplifier module outputs a first characteristic PULSE signal DI _ IN, and the integrated circuit executes the steps of the method.
Further, a first input pin of the primary network transformer U1 is connected to a supply voltage, and a third output pin of the secondary network transformer U2 is grounded.
The network transformer module further comprises a first filter circuit module, the primary network transformer U1 and the secondary network transformer U2 are connected through the first filter circuit module, and the primary network transformer U1 and the secondary network transformer U2 are isolated. Specifically, the first filter circuit module includes at least one first capacitor C1 and at least one fourth resistor R4, a first end of the first capacitor C1 is connected to the third output pin of the primary network transformer U1, a second end of the first capacitor C1 is connected to a second end of the fourth resistor R4 and the second input pin of the secondary network transformer U2, and a first end of the fourth resistor R4 is connected to the first input pin of the secondary network transformer U2. The first capacitor C1 mainly filters out direct current and low frequency signals, and the fourth resistor R4 mainly filters out interference signals.
It should be noted that, a plurality of first capacitors C1 and a plurality of fourth resistors R4 may be connected in series or in parallel in the first filter circuit module, as long as the effect is the same as that of the above-mentioned one first capacitor C1 and one fourth resistor R4, and those skilled in the art can perform the series or parallel implementation, and therefore, the implementation is not limited and described in detail.
The integrated circuit component further comprises an MCU control unit module and a first impedance matching circuit module, wherein the MCU control unit module outputs a drive PULSE signal DI _ PULSE to a second input pin of the primary network transformer U1 through the first impedance matching circuit module. Specifically, the first impedance matching circuit module includes at least one first resistor R1, the MCU control unit module outputs the driving PULSE signal DI _ PULSE to a first end of the first resistor R1, and a second end of the first resistor R1 is connected to a second input pin of the primary network transformer U1.
The signal amplifier module comprises a triode Q1, at least one second resistor R2, at least one second capacitor C2, at least one third resistor R3 and at least one third capacitor C3, the base of the triode Q1 is connected with a fourth output pin of a secondary network transformer U2, the collector of the triode Q1 outputs a first characteristic pulse signal DI _ IN, the first end of the second resistor R2 is connected with the fourth output pin of the secondary network transformer U2 module, the second end of the second resistor R2 is connected with the first end of the second capacitor C2 and the base of the triode Q1, the collector of the triode Q1 is connected with the base of the triode Q1 IN an upward pulling mode through the third resistor R3, the second end of the second capacitor C2 is grounded, the first end of the third capacitor C3 is connected with the collector of the triode Q1, and the second end of the third capacitor C3 is connected with the emitter of the triode Q1 and grounded. Since there is signal attenuation after the excitation PULSE signal DI _ PULSE is transformed by the two stages of the primary network transformer U1 and the secondary network transformer U2, respectively, a signal amplifier module is required to amplify the PULSE to obtain the output first characteristic PULSE signal DI _ IN.
It should be noted that the signal amplifier module adopted in the present invention may also be other components having a signal amplification function, and the technical solution herein is only for illustration and is not limited.
Example three:
referring to fig. 3, based on the second embodiment, a third embodiment of the present invention provides an integrated circuit component for detecting an isolation switching value based on a network transformer, where the integrated circuit component is different from the second embodiment in that: and the integrated circuit of the second embodiment is applied, designed and packaged into a component product, so that a miniaturized component functional unit is realized.
Referring to fig. 4, a modification of the first embodiment is different from the first embodiment in that:
when at least two measuring unit modules are required to be connected in parallel to detect the state of the same to-be-detected isolating switch quantity, the two ends of the to-be-detected isolating switch module S1 are connected with the input side of the optocoupler module, wherein the optocoupler module comprises an isolating power supply U4, an optocoupler U3 and a current limiting circuit module, a first pin on the input side of the optocoupler U3 is connected with the isolating power supply U4 for supplying power, and a second pin on the input side of the optocoupler U3 is connected with the current limiting circuit module.
When the to-be-detected isolating switch module S1 is in an open circuit state, the current of the isolating power supply U4 forms a loop through the optocoupler U3, the current limiting circuit module, the primary network transformer U1 and the first filter circuit module;
and the impedance value of the current limiting circuit module is larger than the impedance value which can be detected by the network transformer, and after the parallel connection, the states of detecting the same to-be-detected isolating switch quantity are not influenced mutually.
Example four:
based on the first embodiment, the second embodiment and the modified examples, a fourth embodiment of the present invention provides a multipoint parallel circuit for detecting an isolation switching value based on a network transformer, which is different from the first embodiment and the second embodiment in that: the multipoint parallel circuit comprises a circuit which comprises a network transformer module, an isolating switch module S1 to be detected and at least one optocoupler module which are electrically connected with one another; the network transformer module comprises a primary network transformer U1, a secondary network transformer U2 and a signal amplifier module;
the second input pin of the primary network transformer U1 inputs an excitation PULSE signal DI _ PULSE, the first end of the isolation switch module S1 to be detected is connected with the fourth output pin of the primary network transformer U1 and the second pin of the input side of the at least one optical coupling module, the second end of the isolation switch to be detected is connected with the first input pin of the secondary network transformer U2 and the first pin of the input side of the at least one optical coupling module, the third output pin of the primary network transformer U1 is connected with the second input pin of the secondary network transformer U2, the fourth output pin of the secondary network transformer U2 is connected with the input end of the signal amplifier module, the output end of the signal amplifier module outputs a first characteristic PULSE signal DI _ IN, and the output side of the optical coupling module outputs a second characteristic PULSE signal DI _ IN.
The optical coupler module comprises an optical coupler U3, an isolation power supply U4 and a current limiting circuit module, a first pin of the optical coupler U3 is connected with the anode of the isolation power supply U4, a second pin of the optical coupler U3 is connected with the current limiting circuit module, and a third pin of the optical coupler U3 outputs a second characteristic pulse signal DI _ IN. Typically, the isolated power supply U4 is 24V.
The current limiting circuit module comprises at least one fifth resistor R5, the second end of the fifth resistor R5 is connected with the second pin of the optocoupler U3, the first end of the fifth resistor R5 is connected with the first end of the isolating switch module S1 to be detected, and the negative pole of the isolating power supply U4 is connected with the second end of the isolating switch module S1 to be detected. The current limiting circuit module may also use a plurality of first resistors R1 to connect in series or in parallel, which is not limited herein, and the electrical effect of the current limiting circuit module is the same as that of only one fifth resistor R5, that is, the resistance of only one fifth resistor R5 is the same as that of the plurality of fifth resistors R5 connected in series or in parallel. Generally, the resistance value of the fifth resistor R5 is greater than 1K ohm, and at this time, when the isolator to be detected is open-circuited, the current of the isolation power supply U4 forms a loop through the optocoupler U3, the current limiting circuit module, the primary network transformer U1 and the first filter circuit module; the first capacitor C1 can isolate direct current, a current path is avoided, and the resistance of the fifth resistor R5 is far larger than the resistance which can be detected by the network transformer, so after parallel connection, the states of the optical coupling module scheme and the network transformer module scheme for detecting the same isolating switch quantity to be detected are not influenced mutually, a method for closed-loop detection by utilizing the first characteristic pulse signal DI _ IN and the second characteristic pulse signal DI _ IN can be connected with other DI detection equipment IN parallel, a plurality of measuring units can be connected IN parallel, and the defect that the traditional scheme cannot be connected IN parallel is overcome.
Compared with the prior art, the invention has the beneficial effects that:
1. the method for detecting the isolation switching value based on the network transformer comprises the following steps: the output pin of the MCU control unit module outputs an excitation pulse signal; the excitation pulse signal is input to a primary network transformer and outputs a first transformation pulse through transformation; the first transformation pulse is input to a secondary network transformer and outputs a second transformation pulse through transformation; the second voltage transformation pulse driving signal amplifier module outputs a first characteristic pulse signal through pulse amplification; the first characteristic pulse signal is input to the measuring unit module for detection, and the state of the to-be-detected isolating switch quantity is judged, wherein the to-be-detected isolating switch module is arranged between the primary network transformer module and the secondary network transformer module, so that isolated DI switch signal detection is realized, the cost, the power consumption and the volume are reduced, meanwhile, the switch signal detection is isolated, an isolation power supply is not needed at the input side, and the to-be-detected isolating switch quantity can be connected with other switch signal detection equipment in parallel, and the implementation method is to use characteristic signal pulses.
2. An integrated circuit is designed by using the method for detecting the isolation switching value based on the network transformer, and the integrated circuit is applied and packaged into a component product, so that a miniaturized component functional unit is realized.
3. When at least two measuring unit modules are required to be connected in parallel to detect the state of the same to-be-detected isolating switch quantity, two ends of the to-be-detected isolating switch module are connected with the input side of an optocoupler module, wherein the optocoupler module comprises an isolating power supply, an optocoupler and a current limiting circuit module, a first pin at the input side of the optocoupler is connected with an isolating power supply for supplying power, a second pin at the input side of the optocoupler is connected with the current limiting circuit module, and when the to-be-detected isolating switch module is in an open circuit state, the current of the isolating power supply forms a loop through the optocoupler, the current limiting circuit module, a primary network transformer and a first filter circuit module; and the impedance value of the current-limiting circuit module is larger than the impedance value which can be detected by the network transformer, after the parallel connection, the states of detecting the same to-be-detected isolating switch quantity are not influenced mutually, and the characteristic signal pulse can be connected with other switch signal detection equipment in parallel without influencing mutually.
The above description is only for the purpose of illustrating the technical solutions of the present invention and is not intended to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; all the equivalent structures or equivalent processes performed by using the contents of the specification and the drawings of the invention, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A method for detecting the quantity of an isolating switch based on a network transformer is characterized in that: the method comprises the following steps:
the output pin of the MCU control unit module outputs an excitation pulse signal;
the excitation pulse signal is input to a primary network transformer and outputs a first transformation pulse through transformation;
the first transformation pulse is input to a secondary network transformer and outputs a second transformation pulse through transformation;
the second voltage transformation pulse driving signal amplifier module outputs a first characteristic pulse signal through pulse amplification;
and the first characteristic pulse signal is input to the measuring unit module for detection, and the state of the to-be-detected isolating switch quantity is judged, wherein the to-be-detected isolating switch module is arranged between the primary network transformer module and the secondary network transformer module.
2. The network transformer-based isolation switching value detection method according to claim 1, wherein: before the excitation pulse signal is input to a primary network transformer and a first transformation pulse is output through transformation, the method further comprises the following steps:
the excitation pulse signal is subjected to signal enhancement through the first impedance matching circuit module and then output to the primary network transformer.
3. The network transformer-based isolation switching value detection method according to claim 2, wherein: before the first transformation pulse is input to the secondary network transformer and the second transformation pulse is output through transformation, the method comprises the following steps:
the first transformation pulse filters out direct current low-frequency signals and interference signals through the first filter circuit module and then outputs the direct current low-frequency signals and the interference signals to the secondary network transformer.
4. The network transformer-based isolation switching value detection method according to claim 1, wherein:
when at least two measuring unit modules are required to be connected in parallel to detect the state of the same to-be-detected isolating switch quantity, two ends of the to-be-detected isolating switch module are connected with the input side of the optocoupler module, wherein the optocoupler module comprises an isolating power supply, an optocoupler and a current limiting circuit module, a first pin on the input side of the optocoupler is connected with the isolating power supply for supplying power, and a second pin on the input side of the optocoupler is connected with the current limiting circuit module.
5. The network transformer-based isolation switching value detection method according to claim 4, wherein: when the to-be-detected isolating switch module is in an open circuit state, the current of an isolating power supply forms a loop through the optical coupler, the current limiting circuit module, the primary network transformer and the first filter circuit module;
and the impedance value of the current limiting circuit module is larger than the impedance value which can be detected by the network transformer, and after the parallel connection, the states of detecting the same to-be-detected isolating switch quantity are not influenced mutually.
6. The utility model provides an isolated switching volume detects integrated circuit based on network transformer which characterized in that: the integrated circuit comprises a network transformer module and an isolation switch module to be detected which are electrically connected with each other, wherein the network transformer module comprises a primary network transformer, a secondary network transformer and a signal amplifier module;
the second input pin of the primary network transformer inputs an excitation pulse signal, the first end of the to-be-detected isolating switch module is connected with the fourth output pin of the primary network transformer, the second end of the to-be-detected isolating switch module is connected with the first input pin of the secondary network transformer, the third output pin of the primary network transformer is connected with the second input pin of the secondary network transformer, the fourth output pin of the secondary network transformer is connected with the input end of the signal amplifier module, the output end of the signal amplifier module outputs a first characteristic pulse signal, and the integrated circuit executes the steps of the method of any one of claims 1 to 3.
7. The network transformer-based isolation switching value detection method according to claim 6, wherein: the network transformer module further comprises a first filter circuit module, and the primary network transformer and the secondary network transformer are connected through the first filter circuit module.
8. The network transformer-based isolation switching value detection method according to claim 7, wherein: the first filter circuit module comprises at least one first capacitor and at least one fourth resistor, wherein a first end of the first capacitor is connected with a third output pin of the primary network transformer, a second end of the first capacitor is connected with a second end of the fourth resistor and a second input pin of the secondary network transformer, and a first end of the fourth resistor is connected with a first input pin of the secondary network transformer.
9. The network transformer-based isolation switching value detection method according to claim 1, wherein: the integrated circuit component further comprises an MCU control unit module and a first impedance matching circuit module, wherein the MCU control unit module outputs excitation pulse signals to a second input pin of the primary network transformer through the first impedance matching circuit module.
10. The network transformer-based isolation switching value detection method according to claim 1, wherein: the signal amplifier module comprises a triode, at least one second resistor, at least one second capacitor, at least one third resistor and at least one third capacitor, the base of the triode is connected with a fourth output pin of the secondary network transformer, a collector of the triode outputs a first characteristic pulse signal, the first end of the second resistor is connected with the fourth output pin of the secondary network transformer module, the second end of the second resistor is connected with the first end of the second capacitor and the base of the triode, the collector of the triode is connected with the collector of the triode in an upward pulling mode through the third resistor, the second end of the second capacitor is grounded, the first end of the third capacitor is connected with the collector of the triode, and the second end of the third capacitor is connected with an emitter of the triode and grounded.
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| CN202211483148.6A Pending CN115754700A (en) | 2022-11-24 | 2022-11-24 | Isolation switching value detection method based on network transformer and integrated circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115754700A (en) |
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2022
- 2022-11-24 CN CN202211483148.6A patent/CN115754700A/en active Pending
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