CN218158148U - Conducted disturbance quality control device - Google Patents

Abstract

The utility model relates to a conduction disturbance quality control device, include: a voltage control circuit for providing a first supply voltage and a second supply voltage; the pulse control circuit is connected with the voltage control circuit and used for generating a pulse control signal under the action of the second power supply voltage; the switch control circuit is respectively connected with the voltage control circuit and the pulse control circuit and is used for receiving the pulse control signal and generating a pulse signal according to the pulse control signal under the action of the first power supply voltage; the shaping circuit is used for shaping the pulse signal to obtain a shaped signal; the coupling isolation circuit is used for coupling the shaping signal and outputting a disturbance signal with discrete frequency to the coupling port; wherein the coupling port is an output port of the coupling isolation circuit. The device provided by the application can be used for verifying the disturbance transmission capability of the system to be tested.

Description

Conducted disturbance quality control device

Technical Field

The utility model relates to an electromagnetic compatibility detects technical field, especially relates to a conduction is harassed and is disturbed quality control device.

Background

Conducted disturbance (also called conducted emission) is an electromagnetic compatibility project for measuring electromagnetic disturbance conducted outwards by electronic products through leads, and is widely applied to electromagnetic compatibility detection of military equipment, information technology equipment, audio and video equipment, communication equipment, automobile electronics, household appliances, industrial, scientific, medical and other products. Factors influencing the measurement accuracy of conducted disturbance are more, such as a measurement receiver, an artificial power supply network/artificial network/line impedance stabilization network, an attenuator, a test site, cable arrangement, environment and personnel operation and the like, and the test consistency of the project in different laboratories may have larger deviation, so that the laboratory needs to carry out quality monitoring on the accuracy of the test system of the project, and conducted disturbance/transmitting capability verification is very necessary to be developed among the laboratories. At present, most of capacity verification devices for the item purchase foreign standard signal sources, the signal sources cannot simulate the arrangement, power supply and the like of actual samples, and the test efficiency and the test precision are limited.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to provide a conducted disturbance quality control device.

A conducted disturbance quality control apparatus, the apparatus configured with a coupling port, the apparatus comprising:

a voltage control circuit for providing a first supply voltage and a second supply voltage;

the pulse control circuit is connected with the voltage control circuit and used for generating a pulse control signal under the action of the second power supply voltage;

the switch control circuit is respectively connected with the voltage control circuit and the pulse control circuit and is used for receiving the pulse control signal and generating a pulse signal according to the pulse control signal under the action of the first power supply voltage;

the shaping circuit is connected with the switch control circuit and is used for shaping the pulse signal to obtain a shaped signal;

the coupling isolation circuit is connected with the shaping circuit and is used for coupling the shaping signal and outputting a disturbance signal with discrete frequency through the coupling port; wherein the coupling port is an output port of the coupling isolation circuit.

In one embodiment, the coupling port comprises one of a telecommunication port, a power port and a banana port, wherein the disturbance signals output by different coupling ports are different.

In one embodiment, the device is further provided with a coupling line connected with the coupling port and used for transmitting the disturbance signals with discrete frequencies to a device to be tested.

In one embodiment, the coupling line comprises one of a telecommunication line for connecting with the telecommunication port, a power line for connecting with the power port, and a banana head power line for connecting with the banana-type port.

In one embodiment, the coupling isolation circuit includes: and the first end of the coupling capacitor is connected with the output end of the shaping circuit, and the second end of the coupling capacitor is connected with the coupling port.

In one embodiment, the apparatus further comprises: and the voltage division matching circuit is respectively connected with the shaping circuit and the first end of the coupling capacitor and is used for receiving the shaping signal, adjusting the amplitude of the shaping signal and performing impedance matching on the shaping signal so as to output a signal with target impedance to the coupling capacitor.

In one embodiment, the pulse control circuit comprises a dial switch for switching fundamental waves with different frequencies, so that the pulse control circuit controls the switch control circuit to generate the disturbance signals with different fundamental wave frequencies, wherein the fundamental waves are signal components of the disturbance signals.

In one embodiment, the voltage control circuit includes:

a battery;

the charging unit is connected with the battery and is used for charging the battery;

the first voltage control unit is connected with the battery and used for filtering and stabilizing voltage of the voltage output by the battery to obtain a first power supply voltage;

and the second voltage control unit is connected with the battery and used for performing voltage stabilization control on the voltage output by the battery to obtain the second power supply voltage.

In one embodiment, the pulse control circuit is connected to the second voltage control unit and the switch control circuit, and is further configured to adjust a pulse period and a pulse width of the pulse control signal under the action of the second power supply voltage.

In one embodiment, the apparatus further comprises: and the positioning circuit is connected with the second voltage control unit and is used for recording the position information of the device.

The conduction disturbance quality control device provides a first power supply voltage and a second power supply voltage through a voltage control circuit; the pulse control circuit is used for generating a pulse control signal under the action of the second power supply voltage; the switch control circuit generates a pulse signal according to the pulse control signal under the action of the first power supply voltage; the shaping circuit is connected with the switch control circuit and is used for shaping the pulse signal to obtain a shaped signal; and coupling the shaped signals through a coupling isolation circuit, and outputting discrete disturbance signals with different frequencies to a device to be tested so as to be suitable for a disturbance transmission capability verification project and improve the efficiency and the test precision of the disturbance transmission capability verification test.

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 of a conducted disturbance quality control apparatus according to an embodiment;

FIG. 2 is a block diagram of a conducted disturbance quality control apparatus according to another embodiment;

FIG. 3 is a diagram of a coupling circuit of a device for controlling the quality of conducted disturbance at a telecommunication port according to an embodiment;

FIG. 4 is a diagram of a coupling circuit of the power port conducted disturbance quality control apparatus according to an embodiment;

FIG. 5 is a diagram of a coupling circuit structure of a CE102 power line conducted disturbance quality control device according to an embodiment;

FIG. 6 is a diagram of an embodiment of a disturbance transmission quality control device;

FIG. 7 is an exemplary diagram of a disturbance signal generated by a 150kHz-30MHz telecommunication port conducted disturbance quality control device according to one embodiment;

FIG. 8 is an exemplary diagram of a disturbance signal generated by the 150kHz-30MHz power port conducted disturbance quality control device according to one embodiment;

fig. 9 and fig. 10 are exemplary diagrams of disturbance signals generated by the CE102 power line conducted disturbance quality control apparatus according to an 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 should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first voltage control unit may be referred to as a second voltage control unit, and similarly, a second voltage control unit may be referred to as a first voltage control unit, without departing from the scope of the present application.

It is to be understood that "connection" in the following embodiments is to be understood as "electrical connection", "communication connection", and the like if the connected circuits, modules, units, and the like have communication of electrical signals or data with each other.

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 conducted disturbance quality control device is provided, the device is provided with a coupling port, and the device comprises a voltage control circuit 10, a pulse control circuit 20, a switch control circuit 30, a shaping circuit 40 and a coupling isolation circuit 50.

A voltage control circuit 10 for providing a first supply voltage and a second supply voltage.

The voltage control circuit 10 is configured to receive a power supply voltage and control the power supply voltage to obtain a first power supply voltage and a second power supply voltage.

And the pulse control circuit 20 is connected with the voltage control circuit 10 and is used for generating a pulse control signal under the action of the second power supply voltage.

The pulse control circuit 20 may be a single chip pulse control circuit. The voltage control circuit 10 obtains the second power supply voltage by performing voltage stabilization on the power supply voltage, and is used for charging the pulse control circuit 20; the pulse control circuit 20 is provided with a timer and a timer, and the frequency of the pulse control signal can be controlled, so that the pulse control circuit 20 generates a pulse control signal with a certain pulse width and pulse repetition period.

And the switch control circuit 30 is respectively connected with the voltage control circuit 10 and the pulse control circuit 20, and is configured to receive the pulse control signal and generate a pulse signal according to the pulse control signal under the action of the first power supply voltage.

The voltage control circuit 10 generates a first supply voltage with high precision and high stability by filtering and stabilizing a power supply voltage, and uses the first supply voltage as an input voltage of the switch control circuit 30, and the switch control circuit 30 is configured to generate a corresponding pulse signal according to the pulse control signal under the action of the first supply voltage.

And the shaping circuit 40 is connected with the switch control circuit 30 and is used for shaping the pulse signal to obtain a shaped signal.

The shaping circuit 40 may be a step diode shaping circuit, and may shape the pulse signal by using the characteristic of a step diode.

The coupling isolation circuit 50 is connected with the shaping circuit 40, and is used for coupling the shaping signal and outputting a disturbance signal with discrete frequency through the coupling port; wherein the coupling port is an output port of the coupling isolation circuit 50.

The disturbance signal with discrete frequency after the coupling processing by the coupling isolation circuit 50 can be output to the device to be tested through the coupling port. The circuit structure of the coupling isolation circuit 50 and the type of the output port may be adaptively set when devices to be tested or test items are different.

In this embodiment, a first supply voltage and a second supply voltage are provided by a voltage control circuit; the pulse control circuit is used for generating a pulse control signal under the action of the second power supply voltage; the switch control circuit generates a pulse signal according to the pulse control signal under the action of the first power supply voltage; the shaping circuit is connected with the switch control circuit and is used for shaping the pulse signal to obtain a shaped signal; and the shaping signal is coupled through the coupling isolation circuit, and discrete disturbance signals in different frequency ranges can be output to the equipment to be tested, so that the method is suitable for verifying the disturbance transmitting capacity, and the efficiency and the test precision of the disturbance transmitting capacity verification test are improved.

In one embodiment, as shown in fig. 2, the apparatus further comprises a voltage division matching circuit 60 connected to the shaping circuit 40 for receiving the shaped signal, adjusting the amplitude of the shaped signal, and performing impedance matching on the shaped signal to output a signal with a target impedance to the coupling capacitor in the coupling isolation circuit 50.

Specifically, the target impedance may be 50 ohms, and the voltage division matching circuit 60 may process the shaped signal and generate a signal with a moderate amplitude, neither too high nor too low, and an impedance of 50 ohms.

In the embodiment, the partial pressure matching circuit is connected with the shaping circuit, so that a signal with target impedance can be generated, the controllability of conducted disturbance signals is improved, and the test accuracy of the conducted disturbance quality control device is favorably improved

In one embodiment, the coupling port comprises one of a telecommunication port, a power port and a banana port, wherein the disturbance signals output by different coupling ports are different.

The device is also provided with a telecommunication coupling line connected with the telecommunication coupling port and used for transmitting the disturbance signals with discrete frequency to the equipment to be tested. The coupling line comprises one of a telecommunication line, a power line and a banana head power line, the telecommunication line is used for being connected with the telecommunication port, the power line is used for being connected with the power port, and the banana head power line is used for being connected with the banana-shaped port.

Specifically, referring to fig. 3, when the coupling port is a telecommunication port and the coupling line is a telecommunication line, the quality control can be performed on a telecommunication port conduction disturbance project of 150kHz to 30 MHz. Preferably, the telecommunication port is an ethernet port, the ethernet port may be an ethernet five-type or six-type port, and the telecommunication line is an ethernet line. The Ethernet line comprises a plurality of signal receiving lines TX +, TX-and a plurality of signal transmitting lines RX +, RX-which are respectively connected with the Ethernet port. The ethernet line may preferably be a 0.9m long ethernet line.

Referring to fig. 4, when the coupling port is a power port and the coupling line is a power line, the quality control can be performed on a power port conduction disturbance project of 150kHz to 30 MHz. Preferably, the power supply port is a delta-shaped alternating current power supply port and comprises a positive terminal L, a negative terminal N and a grounding terminal PE; the power line is an alternating current power line, the length of the alternating current power line can be 0.9m, and the alternating current power line comprises a positive electrode line, a negative electrode line and a grounding line; the positive electrode line is connected with the positive electrode end L, the negative electrode line is connected with the negative electrode end N, and the grounding wire is connected with the grounding end PE.

Referring to fig. 5, when the coupling port is a banana-type port and the coupling line is a banana head power line, quality control can be performed on a CE102 power line conducted disturbance project. Preferably, the banana-type port is a "banana" jack, including a positive jack, a negative jack and a ground jack; the banana head power line can be a 4mm banana head power line and comprises a positive wire, a negative wire and a grounding wire; the positive wire is connected with the positive jack port, the negative wire is connected with the negative jack port, and the grounding wire is connected with the grounding jack port.

In the embodiment, the coupling ports are set to be of various types, such as a telecommunication port, a power port and a banana-shaped port, and the telecommunication line, the power line and the banana head power line correspondingly connected to the different coupling ports are configured, so that the device can generate disturbance signals suitable for different types of conducted disturbance quality control, and the application range and the test accuracy of the device are improved.

In one embodiment, the coupling isolation circuit 50 includes: and the first end of the coupling capacitor is connected with the output end of the shaping circuit 40 through a voltage division matching circuit 60, the second end of the coupling capacitor is connected with the coupling port, the coupling capacitor is used for coupling the current flowing through the circuit, and the signal with the target impedance generated by the voltage division matching circuit 60 is further transmitted to the coupling port after passing through the coupling capacitor. The circuit structure of the coupling isolation circuit 50 is different for different test items.

Specifically, please refer to fig. 3, when the coupling port is the telecommunication port, the number of the coupling capacitors C is one. The voltage dividing matching circuit 60 comprises a positive output end and a negative output end, wherein a first end of the coupling capacitor C is connected with the positive output end of the voltage dividing matching circuit 60, a second end of the coupling capacitor C is connected with the telecommunication port of the coupling isolation circuit 50, and the negative output end of the voltage dividing matching circuit 60 is grounded.

With reference to fig. 4, when the coupling port is the power port, the coupling capacitor includes a first capacitor C1 and a second capacitor C2. The first end of the first capacitor C1 is connected to the positive output end of the voltage division matching circuit 60, the second end of the first capacitor C1 is connected to the positive end L of the power port, the first end of the second capacitor C2 is connected to the positive output end of the voltage division matching circuit 60, the second end of the second capacitor C2 is connected to the negative end N of the power port, and the negative output end of the voltage division matching circuit 60 is connected to the ground end PE of the power port.

With reference to fig. 5, when the coupling port is the banana port, the coupling capacitor includes a third capacitor C3 and a fourth capacitor C4. Wherein, the first end of third electric capacity C3 with voltage division matching circuit 60's positive output end is connected, the second end of third electric capacity C3 with banana type port the positive jack mouth is connected, the first end of fourth electric capacity C4 with voltage division matching circuit 60's positive output end is connected, the second end of fourth electric capacity C4 with banana type port the negative pole jack mouth is connected, voltage division matching circuit 60's negative output with banana type port the ground connection jack mouth is connected.

In this embodiment, different coupling isolation circuits are set for different test items and different types of coupling ports, and a coupling capacitor is set in the coupling isolation circuit, so that the coupling capacitor can perform coupling processing on different disturbance signals, and the precision of the disturbance signals is improved.

In one embodiment, with reference to fig. 2, the voltage control circuit 10 includes: a first voltage control unit 101, a second voltage control unit 102, a charging unit 103, and a battery 104.

The charging unit 103 is connected to the battery 104, and is configured to charge the battery 104, so that the battery 104 supplies power to the apparatus.

And a first voltage control unit 101, connected to the battery 104, for performing filtering and voltage stabilization control on the voltage output by the battery 104 to obtain a first supply voltage with high precision and high stability, so that the first supply voltage is used as an input of the switch control circuit 30.

And a second voltage control unit 102, connected to the battery 104, configured to perform filtering and voltage stabilizing control on the voltage output by the battery 104 to obtain the second power supply voltage, so that the pulse control circuit 20 is powered by the second power supply voltage.

In this embodiment, power supply voltage is provided through the charging unit and the battery, and the first voltage control unit and the second voltage control unit are right power supply voltage carries out filtering and voltage stabilization control, can obtain the power supply voltage of high accuracy, high stability, make switch control circuit, pulse control circuit in the device can be in the pulse signal of high accuracy, high stability is produced under power supply voltage's effect, further improves the precision and the stability of test.

In one embodiment, the pulse control circuit 20 is connected to the second voltage control unit 102 and the switch control circuit 30, and is further configured to adjust a pulse period and a pulse width of the pulse control signal under the action of the second power supply voltage.

The pulse control circuit 20 includes a timer and a timer, and the pulse control circuit 20 can control the pulse width and the pulse repetition period of the pulse control signal under the action of the timer and the timer.

In one embodiment, with continued reference to fig. 2, the apparatus further includes a positioning circuit 70 connected to the second voltage control unit 102 for recording position information of the apparatus. The positioning circuit 70 may include a positioning unit for acquiring the current longitude and latitude data of the device, and a data processing unit for determining the position of the device according to the longitude and latitude data.

In one embodiment, the disturbance transmission quality control device can be produced in large scale, a plurality of devices can be distributed in a plurality of laboratories at the same time in parallel to perform disturbance transmission capability test at the same time, the test time is shortened, and when one device is damaged, the device can be immediately replaced by a spare device. The device provided by the application can be used for conveniently and quickly finding problems in a laboratory, and can be used for internal quality control, detection method research, capability verification and the like.

In one embodiment, please refer to fig. 6 for the appearance structure of the disturbance transmission quality control device. The conducted disturbance quality control device further comprises a housing. Wherein, the voltage control circuit 10, the pulse control circuit 20, the switch control circuit 30, the shaping circuit 40, the coupling isolation circuit 50, the voltage division matching circuit 60 and the positioning circuit 70 are arranged in the shell. The pulse control circuit 20 further comprises a dial switch arranged on the surface of the shell, and the fundamental waves with different frequencies can be switched by dialing the dial switch. The disturbance signals include a fundamental wave part and a harmonic wave part, and switching of the fundamental wave can enable the pulse control circuit 20 to control the switch control circuit 30 to generate the disturbance signals with different frequencies according to the fundamental wave, without additionally adding circuits such as a spread spectrum branch circuit, a branch circuit switch, a diode and the like.

Examples of the disturbance signals generated by the device are shown in fig. 7-10, where fig. 7 is an example of disturbance signals generated by a 150kHz-30MHz telecommunication port conducted disturbance quality control device, fig. 8 is an example of disturbance signals generated by a 150kHz-30MHz power port conducted disturbance quality control device, and fig. 9 and 10 are examples of disturbance signals generated by a CE102 power line conducted disturbance quality control device.

In the test, whether the deviation is caused or not can be judged by comparing the test result graph with the example graphs of fig. 7 to 10. Wherein the abscissa is frequency and the ordinate is amplitude. As can be seen from fig. 7-10, the device is capable of generating a series of disturbance signals with discrete frequency and stable amplitude. Discrete frequency covers the whole measuring range on the abscissa axis, and amplitude with proper size is clear and visible, so that the saturation of a measuring receiver is avoided due to overhigh frequency, and the measured background is not submerged too low.

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 invention. 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 embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within 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 represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A conducted disturbance quality control apparatus, the apparatus configured with a coupling port, the apparatus comprising:

a voltage control circuit for providing a first supply voltage and a second supply voltage;

the pulse control circuit is connected with the voltage control circuit and used for generating a pulse control signal under the action of the second power supply voltage;

the switch control circuit is respectively connected with the voltage control circuit and the pulse control circuit and is used for receiving the pulse control signal and generating a pulse signal according to the pulse control signal under the action of the first power supply voltage;

the shaping circuit is connected with the switch control circuit and is used for shaping the pulse signal to obtain a shaped signal;

the coupling isolation circuit is connected with the shaping circuit and used for coupling the shaping signal and outputting a disturbance signal with discrete frequency through the coupling port; wherein the coupling port is an output port of the coupling isolation circuit.

2. The apparatus of claim 1, wherein the coupled port comprises one of a telecommunications port, a power port, a banana port, wherein different ones of the coupled ports output different ones of the disturbance signals.

3. The device of claim 2, wherein the device is further configured with a coupling line connected to the coupling port for transmitting the disturbance signal with discrete frequency to a device under test.

4. The apparatus of claim 3 wherein the coupling line comprises one of a telecommunications line for connection with the telecommunications port, a power line for connection with the power port, and a banana head power line for connection with the banana-type port.

5. The apparatus of claim 1, wherein the coupling isolation circuit comprises: and the first end of the coupling capacitor is connected with the output end of the shaping circuit, and the second end of the coupling capacitor is connected with the coupling port.

6. The apparatus of claim 5, further comprising:

and the voltage division matching circuit is respectively connected with the shaping circuit and the first end of the coupling capacitor and is used for receiving the shaping signal, adjusting the amplitude of the shaping signal and performing impedance matching on the shaping signal so as to output a signal with target impedance to the coupling capacitor.

7. The apparatus of claim 1, wherein the pulse control circuit comprises a dial switch for switching fundamental waves of different frequencies so that the pulse control circuit controls the switch control circuit to generate the disturbance signals with different fundamental wave frequencies, wherein the fundamental waves are signal components of the disturbance signals.

8. The apparatus of claim 1, wherein the voltage control circuit comprises:

a battery;

the charging unit is connected with the battery and is used for charging the battery;

the first voltage control unit is connected with the battery and used for filtering and stabilizing voltage of the voltage output by the battery to obtain the first power supply voltage;

and the second voltage control unit is connected with the battery and used for performing voltage stabilization control on the voltage output by the battery to obtain the second power supply voltage.

9. The apparatus of claim 8, wherein the pulse control circuit is connected to the second voltage control unit and the switch control circuit, and further configured to adjust a pulse period and a pulse width of the pulse control signal under the action of the second power supply voltage.

10. The apparatus of claim 8, further comprising:

and the positioning circuit is connected with the second voltage control unit and is used for recording the position information of the device.

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