CN215867046U - Circuit state detection device and switching circuit - Google Patents
Circuit state detection device and switching circuit Download PDFInfo
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- CN215867046U CN215867046U CN202120685988.5U CN202120685988U CN215867046U CN 215867046 U CN215867046 U CN 215867046U CN 202120685988 U CN202120685988 U CN 202120685988U CN 215867046 U CN215867046 U CN 215867046U
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Abstract
The present application relates to a circuit state detection device and a switch circuit, the circuit state detection device including: the sampling circuit samples the main loop to obtain a sampling signal and sends the sampling signal to the circuit state detection circuit; the sampling circuit is connected with more than two nodes in the main loop; a circuit state detection circuit for acquiring the sampling signal and the control information of the switch element sent by the control circuit and outputting the circuit state judgment result; the switching element controls the on-off of the main loop; an alarm circuit for obtaining the circuit state judgment result and outputting alarm information; the circuit state detection circuit is connected with the sampling circuit, the control circuit and the alarm circuit. The circuit state detection device can realize real-time detection of the circuit state, and is favorable for improving the use safety of the switch circuit.
Description
Technical Field
The present disclosure relates to circuit state detection technologies, and particularly to a circuit state detection device and a switch circuit.
Background
Switching elements are used as basic elements of circuits in various types of electronic circuits. The reliability of the state of the switching elements directly affects the safety of the circuit using the switching elements. Switch adhesion or malfunction can lead to the circuit to take place short circuit or open circuit risk, and then arouse the complete machine trouble.
However, the conventional switch circuit does not have a real-time detection function of the circuit state, and usually, after the circuit fails, a worker detects each component element in the circuit one by one. Therefore, the conventional switch circuit has a problem of poor safety in use.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide a circuit state detection device and a switch circuit to improve the safety of the switch circuit in terms of the problem of poor safety of the conventional switch circuit.
A circuit state detection device comprising:
the sampling circuit samples the main loop to obtain a sampling signal and sends the sampling signal to the circuit state detection circuit; the sampling circuit is connected with more than two nodes in the main loop;
the circuit state detection circuit is used for acquiring the sampling signal and control information of the switching element sent by the control circuit and outputting a circuit state judgment result; the switching element controls the on-off of the main loop;
the alarm circuit is used for acquiring the circuit state judgment result and outputting alarm information;
the circuit state detection circuit is connected with the sampling circuit, the control circuit and the alarm circuit.
In one embodiment, the sampling circuit comprises a sampling unit and a conversion unit; the sampling unit is connected with the conversion unit and more than two nodes in the main loop; the conversion unit is connected with the circuit state detection circuit.
In one embodiment, the sampling circuit further includes a filtering unit, and the filtering unit is connected to the sampling unit and two or more nodes in the main loop.
In one embodiment, the transform unit is a quantization and coding unit.
In one embodiment, the circuit state detection circuit comprises a state coding unit and a comparison unit, wherein the state coding unit is connected with the sampling circuit and the comparison unit, and the comparison unit is connected with the sampling circuit, the control circuit and the alarm circuit.
In one embodiment, the state encoding unit includes a first and gate, a second and gate, a first or gate and two or more not gates, the two or more not gates are connected to different output ends of the sampling circuit, the first and gate is connected to each not gate and the first or gate, the second and gate is connected to different output ends of the sampling circuit and the first or gate, and the first or gate is connected to the comparison unit.
In one embodiment, the comparison unit includes a first not gate, an exclusive or gate and a second or gate, the first not gate is connected to the first or gate, the exclusive or gate is connected to any output terminal of the sampling circuit and the control circuit, and the second or gate is connected to the first not gate, the exclusive or gate and the alarm circuit.
In one embodiment, the alarm circuit comprises a driving circuit and an indicator light, and the driving circuit is connected with the circuit state detection circuit and the indicator light.
A switching circuit comprises a power supply device, a current limiting circuit, a switching element, a control circuit and the circuit state detection device; the control circuit is connected with the switching element and the circuit state detection device; the power supply device, the current limiting circuit and the switch element are sequentially connected to form a main loop, and the circuit state detection device is further connected with more than two nodes in the main loop.
In one embodiment, the switching element is a relay.
The circuit state detection device comprises a sampling circuit, a circuit state detection circuit and an alarm circuit. The sampling circuit is connected with more than two nodes in the main loop, and can sample different positions of the main loop to obtain a sampling signal and send the sampling signal to the circuit state detection circuit; the circuit state detection circuit outputs a circuit state judgment result to the alarm circuit according to the sampling signal and the control information of the switch element; finally, the alarm circuit outputs alarm information, so that the real-time detection of the circuit state can be realized, and the use safety of the switch circuit is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a block diagram showing the components of a circuit state detection device according to an embodiment;
FIG. 2 is a block diagram of the components of a sampling circuit in one embodiment;
FIG. 3 is a schematic diagram of a circuit state detection circuit according to an embodiment;
fig. 4 is a block diagram showing the components of the switching circuit in one embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments is understood to mean "electrical connection", "communication connection", or the like, if there is a transfer of electrical signals or data between the connected objects.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.
In one embodiment, as shown in fig. 1, a circuit state detection apparatus is provided, which includes a sampling circuit 110, a circuit state detection circuit 120 and an alarm circuit 130, wherein the circuit state detection circuit 120 is connected to the sampling circuit 110, the alarm circuit 130 and a control circuit. The sampling circuit 110 is connected with more than two nodes in the main loop, samples the main loop to obtain a sampling signal and sends the sampling signal to the circuit state detection circuit 120; the circuit state detection circuit 120 acquires the sampling signal and the control information of the switching element sent by the control circuit, and outputs a circuit state judgment result; the alarm circuit 130 acquires the circuit state determination result and outputs alarm information.
The sampling circuit 110 may be a circuit that includes a voltage dividing or shunting device and performs electrical parameter sampling based on the voltage dividing or shunting principle. The circuit state detection circuit 120 may be a circuit including a control chip or a controller and capable of performing logical operations, or may be a circuit including a comparator and capable of comparing and determining input signals and outputting corresponding signals. The alarm circuit 130 may be an indicator light and/or a buzzer and a driving circuit thereof. In short, the present embodiment does not limit the specific types and circuit configurations of the sampling circuit 110, the circuit state detection circuit 120, and the alarm circuit 130.
Further, the control information of the switching element refers to control information of a switching element in the main circuit, the switching element being used for controlling on/off of the main circuit. The control information of the switching element may be the control signal itself or may be encoded information of the control signal, corresponding to the control signal of the switching element.
Specifically, the sampling circuit 110 is connected to two or more nodes in the main loop, samples different positions of the main loop to obtain sampling signals, and sends the sampling signals of the nodes to the circuit state detection circuit 120. The circuit state detection circuit 120 obtains the sampling signal and the control information of the switching element sent by the control circuit, and outputs the circuit state judgment result to the alarm circuit 130: and when the working mode of the switching element reflected by the sampling signal is consistent with the working mode of the switching element corresponding to the control information and the sampling signals at different positions in the main loop are consistent, outputting a judgment result that the circuit state is normal, otherwise, outputting a judgment result that the circuit state is abnormal. Finally, the alarm circuit 130 outputs alarm information according to the circuit state judgment result.
The circuit state detection device comprises a sampling circuit 110, a circuit state detection circuit 120 and an alarm circuit 130. The sampling circuit 110 is connected to two or more nodes in the main loop, and can sample different positions of the main loop to obtain a sampling signal and send the sampling signal to the circuit state detection circuit 120; the circuit state detection circuit 120 outputs a circuit state judgment result to the alarm circuit 130 according to the sampling signal and the control information of the switching element; finally, the alarm circuit 130 outputs alarm information, so that the real-time detection of the circuit state can be realized, and the use safety of the switch circuit can be improved.
In one embodiment, the alarm circuit 130 includes a driver circuit and an indicator light, the driver circuit being coupled to the circuit status detection circuit 120 and the indicator light.
The indicator Light may be an LED (Light-Emitting Diode) Light, a halogen Light, a neon Light, or the like. Furthermore, the warning of different circuit states can be carried out by setting the color of warning light. For example, when the control information is off, but the main loop is in a pass state according to the sampling signal, it indicates that the main loop has a short-circuit fault; when the control information is closed, but the main loop is in an open circuit state according to the sampling signal, the open circuit fault of the main loop is shown. Above two kinds of circumstances are the circuit state unusually together, but can correspond the warning signal of output different colours, and the staff of being convenient for overhauls.
In one embodiment, as shown in FIG. 2, sampling circuit 110 includes a sampling unit 112 and a conversion unit 113. The sampling unit 112 is connected with the conversion unit 113 and more than two nodes in the main loop; the conversion unit 113 is connected to the circuit state detection circuit 120.
The sampling unit 112 is a circuit unit that includes a voltage dividing or shunting device, and performs electrical parameter sampling based on a voltage dividing or shunting principle to obtain sampling information. The conversion unit 113 is a circuit unit that processes the sampling information to obtain a sampling signal, and the conversion unit 113 may be an analog-to-digital converter, an amplifier, or an isolation optocoupler. In one embodiment, the conversion unit 113 is a quantization and coding unit, and may encode the sampling information transmitted by the sampling unit 112 and output digital encoded information.
Specifically, the sampling unit 112 connects two or more nodes in the main loop, samples different positions of the main loop to obtain sampling information, and sends the sampling information to the conversion unit 113. The sampling information is converted by the conversion unit 113 to obtain a sampling signal, and the sampling signal is sent to the circuit state detection circuit 120.
In the above embodiment, the configuration conversion unit 113 performs conversion processing on the sampling information, which is convenient for the analysis and processing of the back-end circuit state detection circuit 120, and improves the working efficiency.
In one embodiment, with continued reference to fig. 2, the sampling circuit 110 further includes a filtering unit 111, and the filtering unit 111 is connected to the sampling unit 112 and two or more nodes in the main loop.
The filter unit 111 may be a passive filter circuit unit composed of passive devices such as a resistor, a capacitor, or an inductor, or may be an active filter circuit unit composed of active devices such as a bipolar tube, a unipolar tube, or an integrated operational amplifier. When the filter unit 111 is a passive filter circuit unit composed of capacitors, the number of the capacitors may be one or more. Further, the capacitor may be a polar capacitor or a nonpolar capacitor.
Specifically, the electrical signals at different positions in the main loop are filtered by the filtering unit 111 and then reach the sampling unit 112. Because the filtering unit 111 can filter the received direct current, the impurity interference signal can be prevented from interfering the sampling signal, which is beneficial to improving the quality of the sampling signal.
In one embodiment, as shown in fig. 3, the circuit state detection circuit 120 includes a state encoding unit 121 and a comparing unit 122, the state encoding unit 121 is connected to the sampling circuit 110 and the comparing unit 122, and the comparing unit 122 is connected to the sampling circuit 110, the control circuit and the alarm circuit 130. Further, the state encoding unit 121 and the comparing unit 122 are specifically connected to the converting unit 113 in the sampling circuit 110.
The state encoding unit 121 may be a gate circuit or an encoder. The comparing unit 122 may be a comparator or a gate circuit. Specifically, the state encoding unit 121 encodes the sampling signal to obtain the current running status of the coded information representing the main loop, and determines whether the sampling signals at different positions in the main loop are consistent. The comparison unit 122 compares the sampling signal, the coding information, and the control information of the switching element sent by the control circuit, and outputs a circuit state judgment result according to the correspondence relationship between the sampling signal, the coding information, and the control information of the switching element. And when the sampling signal is consistent with the control information, namely the state of the switch element is normal, and the coding information indicates that the sampling signals at different positions in the main loop are consistent, outputting a judgment result that the state of the circuit is normal, otherwise, outputting a judgment result that the state of the circuit is abnormal.
In the above embodiment, the configuration state encoding unit 121 encodes the sampling signal to obtain the encoding information, and the configuration comparing unit 122 compares the sampling signal, the control information, and the encoding information, so that the real-time detection of the switch state can be realized in a pure hardware manner, which is beneficial to improving the reliability of the circuit state detection.
In one embodiment, the state encoding unit 121 includes a first and gate, a second and gate, a first or gate, and more than two not gates. The two or more not gates are connected to different output terminals of the sampling circuit 110, the first and gate is connected to each not gate and the first or gate, the second and gate is connected to different output terminals of the sampling circuit and the first or gate, and the first or gate is connected to the comparison unit 122.
More than two not gates are specifically connected to different output ends of the conversion unit 113 in the sampling circuit 110, and respectively obtain sampling signals at different positions in the main loop. For the sake of understanding, the following description will take an example in which the sampling circuit is connected to three nodes in the main loop.
As shown in fig. 4, the power supply device 200, the current limiting circuit 300, and the switching element 400 form a main circuit, and the sampling circuit 110 is connected to three different nodes a, b, and C in the main circuit, obtains sampling signals A, B and C at the corresponding nodes, and outputs the sampling signals to the circuit state detection circuit 120. As shown in fig. 3, the sampling signals A, B and C at different nodes are respectively input to the first and gate U4 after passing through the second not gate U1, the third not gate U2 and the fourth not gate U3, and are respectively input to the second and gate U5. The output signals of the first and gate U4 and the second and gate U5 are input to an or gate U6, and finally the encoded information N is output to the comparing unit 122 by the or gate U6. According to the gate principle, the encoded information N is high only when the sampling signals A, B and C are both high signals or both low signals. And N is high level, which indicates that the sampling signals of all nodes in the main loop are consistent at the moment.
In one embodiment, the comparing unit 122 includes a first not gate U7, an exclusive or gate U8, and a second or gate U9, the first not gate U7 is connected to the first or gate U6, the exclusive or gate U8 is connected to any output terminal of the sampling circuit 110 and the control circuit, and the second or gate U9 is connected to the first not gate U7, the exclusive or gate U8, and the alarm circuit 130.
Similarly, the sampling circuit is connected to three nodes in the main loop as an example. With continued reference to fig. 3, on one hand, the xor gate U8 obtains the sampling signal A, B or C from any node, and compares the sampling signal with the control information M of the switching element sent by the control circuit to determine the operating state of the switching element. That is, when the operation mode of the switching element reflected by the sampling signal A, B or C matches the operation mode of the switching element corresponding to the control information M, it indicates that the switching element is in a normal state, and the low-level signal P is output. On the other hand, the encoded information N output from the state encoding section 121 is converted into a signal O after passing through the first not gate U7, and the signal O is also at a low level when the sampling signals at the nodes in the main circuit match. And finally, the second or gate U9 outputs an alarm signal Y according to the signal P and the signal O. And only when the signal P and the signal O are low-level signals, namely the state of the switch element is normal and the sampling signals of all nodes in the main loop are consistent, the alarm signal Y is low-level, and the state of the characterization circuit is normal.
In the above embodiment, a specific circuit structure of the circuit state detection circuit 120 is provided, and the real-time judgment of the circuit state is realized through the gate circuit, so that the circuit structure is simple and the cost is low.
In one embodiment, as shown in fig. 4, a switching circuit is provided, which includes a power supply device 200, a current limiting circuit 300, a switching element 400, a control circuit 500, and the circuit state detection device 100. The control circuit 500 connects the switching element 400 and the circuit state detection device 100; the power supply device 200, the current limiting circuit 300, and the switching element 400 are connected in sequence to form a main circuit, and the circuit state detection device 100 is also connected to two or more nodes in the main circuit.
The power supply device 200 may include an electric energy storage module, may output electric energy to the outside, or may be a power supply terminal for connecting an external power supply. The electrical energy storage module may be an energy storage battery or a super capacitor. The current limiting circuit 300 may be a circuit including a current limiting element such as a current limiter or a current limiting resistor. The number of the current-limiting resistors can be one or more, and the connection mode of the current-limiting resistors can be series connection, parallel connection or series-parallel connection. The switching element 400 may be various types of switching tubes or relays. The control circuit 500 may be a circuit containing various types of controllers or control chips. In summary, the present embodiment does not limit the types and circuit configurations of the power supply device 200, the current limiting circuit 300, the switching element 400, and the control circuit 500.
Specifically, the power supply device 200, the current limiting circuit 300, and the switching element 400 are connected in sequence to form a main circuit. The circuit state detection device 100 is connected to two or more nodes in the main circuit, samples different positions in the main circuit, and determines whether or not a fault such as an open circuit or a short circuit exists in the main circuit. The control circuit 500 transmits a control signal to the switching element 400 to control the on/off of the main circuit, and transmits control information corresponding to the control signal to the circuit state detection device 100 so that the circuit state detection device 100 determines the operating state of the switching element 400. The circuit state detection device 100 combines the sampling signal and the control information to perform circuit state judgment and alarm, and outputs a judgment result that the circuit state is normal when the working mode of the switching element 400 reflected by the sampling signal is consistent with the working mode of the switching element 400 corresponding to the control information and the sampling signals at different positions in the main loop are consistent, or outputs a judgment result that the circuit state is abnormal and alarms.
The switching circuit is provided with the circuit state detection device 100 to detect the circuit state in real time, and is beneficial to improving the use safety of the switching circuit.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A circuit state detection device, comprising:
the sampling circuit samples the main loop to obtain a sampling signal and sends the sampling signal to the circuit state detection circuit; the sampling circuit is connected with more than two nodes in the main loop;
the circuit state detection circuit is used for acquiring the sampling signal and control information of the switching element sent by the control circuit and outputting a circuit state judgment result; the switching element controls the on-off of the main loop;
the alarm circuit is used for acquiring the circuit state judgment result and outputting alarm information;
the circuit state detection circuit is connected with the sampling circuit, the control circuit and the alarm circuit.
2. The circuit state detection device according to claim 1, wherein the sampling circuit includes a sampling unit and a conversion unit; the sampling unit is connected with the conversion unit and more than two nodes in the main loop; the conversion unit is connected with the circuit state detection circuit.
3. The circuit state detection device according to claim 2, wherein the sampling circuit further comprises a filter unit, and the filter unit connects the sampling unit and two or more nodes in the main loop.
4. The circuit state detection device according to claim 2, wherein the conversion unit is a quantization and coding unit.
5. The circuit state detection device according to claim 1, wherein the circuit state detection circuit comprises a state coding unit and a comparison unit, the state coding unit is connected with the sampling circuit and the comparison unit, and the comparison unit is connected with the sampling circuit, the control circuit and the alarm circuit.
6. The circuit state detection device according to claim 5, wherein the state encoding unit comprises a first AND gate, a second AND gate, a first OR gate and two or more NOT gates, the two or more NOT gates are connected to different output terminals of the sampling circuit, the first AND gate is connected to each NOT gate and the first OR gate, the second AND gate is connected to different output terminals of the sampling circuit and the first OR gate, and the first OR gate is connected to the comparison unit.
7. The circuit state detection device according to claim 6, wherein the comparison unit comprises a first not gate, an exclusive or gate, and a second or gate, the first not gate is connected to the first or gate, the exclusive or gate is connected to any output terminal of the sampling circuit and the control circuit, and the second or gate is connected to the first not gate, the exclusive or gate, and the alarm circuit.
8. The circuit status detecting device according to claim 1, wherein the alarm circuit includes a drive circuit and an indicator lamp, the drive circuit connecting the circuit status detecting circuit and the indicator lamp.
9. A switching circuit comprising power supply means, a current limiting circuit, a switching element, a control circuit, and the circuit state detection means according to any one of claims 1 to 8; the control circuit is connected with the switching element and the circuit state detection device; the power supply device, the current limiting circuit and the switch element are sequentially connected to form a main loop, and the circuit state detection device is further connected with more than two nodes in the main loop.
10. The switching circuit according to claim 9, wherein the switching element is a relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202120685988.5U CN215867046U (en) | 2021-04-02 | 2021-04-02 | Circuit state detection device and switching circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120685988.5U CN215867046U (en) | 2021-04-02 | 2021-04-02 | Circuit state detection device and switching circuit |
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| CN215867046U true CN215867046U (en) | 2022-02-18 |
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