CN220626543U - Detection device for detecting high-frequency pulse signals by using PLC - Google Patents
Detection device for detecting high-frequency pulse signals by using PLC Download PDFInfo
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- CN220626543U CN220626543U CN202321879418.5U CN202321879418U CN220626543U CN 220626543 U CN220626543 U CN 220626543U CN 202321879418 U CN202321879418 U CN 202321879418U CN 220626543 U CN220626543 U CN 220626543U
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- 238000006243 chemical reaction Methods 0.000 description 16
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Abstract
The utility model discloses a detection device for detecting high-frequency pulse signals by using a PLC (programmable logic controller), which belongs to the technical field of pulse signal detection and aims to solve the problems that the detection device in the prior art is usually high in cost, the working accuracy of small equipment is poor, pulse signals output by a line loss module cannot be acquired, and meanwhile, the pulse signals are required to be acquired manually, so that the labor is wasted. The device comprises a line loss module, a multivibrator, an isolated optocoupler circuit and a programmable logic controller; the output end of the line loss module is connected with the input end of the multivibrator, and the output end of the multivibrator is connected with the input end of the isolation optocoupler circuit; the utility model is suitable for pulse signal detection, can complete detection work through the PLC, greatly reduces the cost of the detection device, simultaneously, the pulse signal output by the line loss module can be directly connected with the input end of the double-retriggerable monostable multivibrator, and does not need to be collected by staff, thereby saving manpower.
Description
Technical Field
The utility model relates to a detection device for detecting a high-frequency pulse signal by using a PLC (programmable logic controller), belonging to the technical field of pulse signal detection.
Background
The pulse output interface of the line loss module is used for a plurality of devices in the national power grid, the interface outputs line loss state data in the number of pulse signals with a few times per second, and the device with the line loss pulse output interface has two methods for performing function test. The test tool is used for testing a special test tool manufactured for equipment, the test tool has only part of functions of a test bench, but the cost is extremely low, and a special test report can be output by connecting a computer, but the test tool is generally used for controlling and reading small-sized equipment such as a PLC (programmable logic controller) and the like, has no higher working precision, the resolution precision of remote control is generally more than 100 milliseconds, has no problem when being used for a common remote signaling remote control function, and has no method for acquiring pulse signals which are output by a line loss module and are less than 2 milliseconds.
The existing detection device for detecting the pulse signals of the line loss module is usually high in cost, the working accuracy of small equipment is poor, the pulse signals output by the line loss module cannot be collected, the device cannot be used practically, the economical efficiency of the device is affected, meanwhile, the existing detection device usually needs to collect the pulse signals manually, a large amount of manpower is wasted, and the practicability of the device is affected.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art, and provides a detection device for detecting high-frequency pulse signals by using a PLC, which solves the problems that the conventional detection device is usually high in cost, the working accuracy of small equipment is poor, pulse signals output by a line loss module cannot be acquired, the device cannot be practically used, the economy of the device is influenced, and meanwhile, the pulse signals are required to be acquired manually, so that a large amount of manpower is wasted.
In order to solve the technical problems, the utility model is realized by adopting the following technical scheme:
the utility model provides a detection device for detecting high-frequency pulse signals by using a PLC (programmable logic controller), which comprises a line loss module, a multivibrator, an isolation optocoupler circuit and a programmable logic controller, wherein the line loss module is connected with the multivibrator;
the output end of the line loss module is connected with the input end of the multivibrator, the output end of the multivibrator is connected with the input end of the isolation optocoupler circuit, and the output end of the isolation optocoupler circuit is connected with the input end of the programmable logic controller;
the line loss module is used for outputting pulse signals, and the multivibrator is used for receiving the pulse signals output by the line loss module and amplifying and converting the pulse signals;
wherein the multivibrator is a dual retriggerable monostable multivibrator.
Further, the multivibrator is 74AHC123AD.
Further, the number of the pulse signals output by the line loss module is at least three.
Further, the isolation optocoupler circuit comprises a first voltage, a second voltage, an optocoupler, a first pull-up resistor, a second pull-up resistor, a matching resistor and a capacitor; one end of the first pull-up resistor is connected with the first voltage, the other end of the first pull-up resistor is connected with one end of the matching resistor through the optocoupler, the other end of the matching resistor is connected with one end of the capacitor, the other end of the capacitor is grounded, one end of the second pull-up resistor is connected with the second voltage, and the other end of the second pull-up resistor is grounded through the optocoupler.
Further, the resistance value of the second pull-up resistor is 2200 Ω.
Further, the resistance value of the first pull-up resistor is 2200 Ω.
Further, the resistance value of the matching resistor is 22Ω.
Further, the capacity of the capacitor is 100NF.
Compared with the prior art, the utility model has the beneficial effects that:
according to the detection device for detecting the high-frequency pulse signals by the PLC, the double-retriggerable monostable multivibrator is matched with the isolation optocoupler circuit, the pulse signals output by the line loss module are converted by the double-retriggerable monostable multivibrator, and the converted pulse signals are subjected to level conversion by the isolation optocoupler circuit, so that the PLC can read the data of the pulse signals after the level conversion, the pulse signals output by the line loss module are confirmed to be normal, the detection work for the line loss module is finished, the detection work can be finished by the PLC, the cost of the detection device is greatly reduced, meanwhile, the pulse signals output by the line loss module can be directly connected with the input end of the double-retriggerable monostable multivibrator, the acquisition work of workers is not needed, the labor is saved, and the practicability of the device is ensured.
Drawings
FIG. 1 is a schematic diagram of a dual retriggerable monostable multivibrator according to an embodiment of the utility model for switching between a Q-Pulse signal and a P-Pulse signal;
FIG. 2 is a schematic diagram of a dual re-triggerable monostable multivibrator switching S-Pulse signal according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of an isolated optocoupler circuit according to an embodiment of the present utility model when converting S-Q signals;
FIG. 4 is a schematic diagram of an isolated optocoupler circuit according to an embodiment of the present utility model when converting Q-Q signals;
fig. 5 is a schematic circuit diagram of an isolated optocoupler circuit according to an embodiment of the present utility model when converting a P-Q signal.
Detailed Description
The utility model is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.
1-2, the utility model provides a detection device for detecting high-frequency pulse signals by using a PLC, which comprises a line loss module, a multivibrator, an isolated optocoupler circuit and a Programmable Logic Controller (PLC); the output end of the line loss module is connected with the input end of the multivibrator, the output end of the multivibrator is connected with the input end of the isolation optocoupler circuit, and the output end of the isolation optocoupler circuit is connected with the input end of the programmable logic controller; the line loss module is used for outputting pulse signals, and the multivibrator is used for receiving the pulse signals output by the line loss module and amplifying and converting the pulse signals; wherein the multivibrator is a dual retriggerable monostable multivibrator.
Specifically, when the pulse signal output by the line loss module needs to be detected by using the PLC, the pulse signal output by the line loss module is input into the double-retriggerable monostable multivibrator, the pulse signal is converted by the double-retriggerable monostable multivibrator, so that the pulse signal which is originally output by the line loss module and is less than 2 milliseconds is converted to more than 500 milliseconds, and the converted pulse signal is input into the isolation optocoupler circuit due to the fact that the power supply voltage of the converted pulse signal is different from that of the PLC, and the level conversion is performed on the converted pulse signal by the isolation optocoupler circuit, so that the PLC can read the data of the pulse signal after the level conversion.
According to the utility model, the double-retriggerable monostable multivibrator is matched with the isolation optocoupler circuit, the pulse signals output by the line loss module are converted through the double-retriggerable monostable multivibrator, and the level conversion is carried out on the converted pulse signals through the isolation optocoupler circuit, so that the PLC can read the data of the pulse signals after the level conversion, the pulse signals output by the line loss module are confirmed to be normal, the detection work of the line loss module is completed, the detection work can be completed through the PLC, the cost of the detection device is greatly reduced, and meanwhile, the pulse signals output by the line loss module can be directly connected with the input end of the double-retriggerable monostable multivibrator, the acquisition work of workers is not needed, the labor is saved, and the practicability of the device is ensured.
1-2, in one embodiment, the multivibrator is 74AHC123AD, and the pulse signals output by the line loss module are at least three.
Specifically, the number of Pulse signals output by the line loss module is at least three, the three Pulse signals are set to be Q-Pulse, P-Pulse and S-Pulse, the model of the multivibrator is 74AHC123AD, and the double-retriggerable monostable multivibrator of the model can only perform conversion work on two Pulse signals, so that at least two double-retriggerable monostable multivibrators of the model are needed; when three pulse signals are converted by using two double-triggerable monostable multivibrators, a first pin is used for inputting the pulse signals before conversion, a fourth pin is used for outputting the pulse signals after conversion to finish the conversion of the first pulse signals, a ninth pin is used for inputting the pulse signals before conversion, and a twelfth pin is used for outputting the pulse signals after conversion to finish the conversion of the second pulse signals; similarly, the conversion of the third pulse signal is completed through another double-retriggerable monostable multivibrator, and U3 and U8 are the same double-retriggerable monostable multivibrator.
An embodiment is described by taking a Pulse signal Q-Pulse output by a line loss module as an example, wherein the signal is a reactive power signal output by the line loss module, a relay protection instrument can be used for simulating the environment, then the line loss module detects data and outputs the data, the signal simulated by the relay protection instrument passes through a test A group of a double-triggerable monostable multivibrator, and a Q-Q signal is output through data reference of measuring parameters R9 and C5, and has a square wave with the duration of more than 1 second, and then the Q-Q signal is subjected to level conversion into a Q signal through an isolation optocoupler circuit, so that the PLC can detect the output data of the line loss module; similarly, the P-Pulse signal is converted by the double-triggerable monostable multivibrator to output a P-Q signal, and the P-Q signal is converted into a P signal by the isolation optocoupler circuit; the S-Pulse signal is converted by the double-retriggerable monostable multivibrator to output an S-Q signal, and the S-Q signal is converted into an S signal by the isolation optocoupler circuit.
As shown in fig. 3-5, in one embodiment, the isolation optocoupler circuit includes a first voltage, a second voltage, an optocoupler, a first pull-up resistor, a second pull-up resistor, a matching resistor, and a capacitor; one end of the first pull-up resistor is connected with the first voltage, the other end of the first pull-up resistor is connected with one end of the matching resistor through the optocoupler, the other end of the matching resistor is connected with one end of the capacitor, the other end of the capacitor is grounded, one end of the second pull-up resistor is connected with the second voltage, and the other end of the second pull-up resistor is grounded through the optocoupler.
Specifically, the resistance value of the second pull-up resistor is 2200 Ω; the resistance value of the first pull-up resistor is 2200 omega; the resistance value of the matching resistor is 22Ω; the capacity of the capacitor is 100NF, fig. 3, fig. 4 and fig. 5 are circuit diagrams for performing level conversion on pulse signals output by different line loss modules, and R14, R17 and R20 are all first pull-up resistors, and the values of the three resistors are the same; r15, R18 and R21 are second pull-up resistors, and the values of the three resistors are the same; u5, U6 and U7 are all identical optocouplers; r16, R19 and R22 are all matched resistors, and the values of the three resistors are the same; c7, C8 and C9 are all capacitors, and the capacities of the three capacitors are the same.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present utility model, and such modifications and variations should also be regarded as being within the scope of the utility model.
Claims (8)
1. The detection device for detecting the high-frequency pulse signals by using the PLC is characterized by comprising a line loss module, a multivibrator, an isolation optocoupler circuit and a programmable logic controller;
the output end of the line loss module is connected with the input end of the multivibrator, the output end of the multivibrator is connected with the input end of the isolation optocoupler circuit, and the output end of the isolation optocoupler circuit is connected with the input end of the programmable logic controller;
the line loss module is used for outputting pulse signals, and the multivibrator is used for receiving the pulse signals output by the line loss module and amplifying and converting the pulse signals;
wherein the multivibrator is a dual retriggerable monostable multivibrator.
2. The apparatus for detecting a high frequency pulse signal by a PLC according to claim 1, wherein the multivibrator is of a type 74AHC123AD.
3. The apparatus for detecting high frequency pulse signals by PLC according to claim 1, wherein the number of pulse signals outputted from the line loss module is at least three.
4. The detection device for detecting a high-frequency pulse signal by using a PLC according to claim 1, wherein the isolation optocoupler circuit comprises a first voltage, a second voltage, an optocoupler, a first pull-up resistor, a second pull-up resistor, a matching resistor and a capacitor; one end of the first pull-up resistor is connected with the first voltage, the other end of the first pull-up resistor is connected with one end of the matching resistor through the optocoupler, the other end of the matching resistor is connected with one end of the capacitor, the other end of the capacitor is grounded, one end of the second pull-up resistor is connected with the second voltage, and the other end of the second pull-up resistor is grounded through the optocoupler.
5. The apparatus for detecting a high-frequency pulse signal by a PLC according to claim 4, wherein the second pull-up resistor has a resistance of 2200 Ω.
6. The apparatus for detecting a high-frequency pulse signal by a PLC according to claim 4, wherein the resistance value of the first pull-up resistor is 2200 Ω.
7. The detecting device for detecting a high-frequency pulse signal by a PLC according to claim 4, wherein the resistance value of the matching resistor is 22Ω.
8. The apparatus according to claim 4, wherein the capacity of the capacitor is 100NF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321879418.5U CN220626543U (en) | 2023-07-18 | 2023-07-18 | Detection device for detecting high-frequency pulse signals by using PLC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321879418.5U CN220626543U (en) | 2023-07-18 | 2023-07-18 | Detection device for detecting high-frequency pulse signals by using PLC |
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| Publication Number | Publication Date |
|---|---|
| CN220626543U true CN220626543U (en) | 2024-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321879418.5U Active CN220626543U (en) | 2023-07-18 | 2023-07-18 | Detection device for detecting high-frequency pulse signals by using PLC |
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| CN (1) | CN220626543U (en) |
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- 2023-07-18 CN CN202321879418.5U patent/CN220626543U/en active Active
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