Performance testing device for power line carrier communication product
Through the combination of passive filters, coupling circuits and signal attenuation units, a simple power line carrier communication product performance testing device is designed, which solves the problems of complex construction and expensive existing equipment, realizes the miniaturization and portability of the test equipment, and is suitable for rapid testing in the production stage.
Patent Information
- Application Number
- CN202422427426.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-10-09
AI Technical Summary
The construction process of existing power carrier performance testing equipment is complicated, the equipment is expensive and cannot be easily moved, and cannot be quickly applied in the production stage.
By combining passive filters, coupling circuits and signal attenuation units, a simple power line carrier communication product performance testing device is designed, including a first power supply filter, a signal coupler, a signal attenuation unit and a test host, to achieve miniaturization and portability of the equipment.
It realizes simple assembly and convenient movement of test equipment, and is suitable for rapid testing of various forms of products to meet the testing needs of production stage.
Smart Images
Figure CN223141926U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power line carrier communication testing, and particularly relates to a performance testing device for power line carrier communication products. Background Art
[0002] The application of power line carrier communication technology is becoming more and more extensive in various industries. In the process of product R & D and production testing in various industries, due to the diverse product forms, the standard power line carrier anti-attenuation testing environment cannot be directly used; moreover, although the standard carrier performance testing environment has high precision, the building process is relatively complex, the required instruments and equipment are relatively expensive, and it cannot be conveniently moved. Therefore, it cannot be quickly applied and popularized in the production stage. Summary of the Utility Model
[0003] The purpose of the utility model is to solve the technical problems that the building process of the existing power carrier performance testing equipment is relatively complex, the required instruments and equipment are relatively expensive, and it cannot be conveniently moved, and to propose a performance testing device for power line carrier communication products.
[0004] The technical problems of the present invention are solved by the following technical solutions:
[0005] A performance testing device for power line carrier communication products includes a first power filter, a first signal coupler, a second power filter, a second signal coupler, a signal attenuation unit, a test host, and a test upper computer; the input end of the first power filter is connected to the mains power system, and the output end is connected to the first signal coupler and the test host; the input end of the first signal coupler is connected to the first power filter and the test host, and the output end is connected to the signal attenuation unit; the input end of the second power filter is connected to the power supply of the product under test, and the output end is connected to the second signal coupler and the product under test; the input end of the second signal coupler is connected to the second power filter and the product under test, and the output end is connected to the signal attenuation unit; the test upper computer is connected to the test host through a communication interface, and is used for sending test instructions and giving test results.
[0006] In some embodiments, the following technical features are further included:
[0007] The frequency range of the first power filter for power line carrier signals is 0.7 MHz to 12 MHz, the signal filtering value is greater than 80 dBm, and the rated current > 0.5 A.
[0008] The frequency range of the second power filter for power line carrier signals is 0.7 MHz to 12 MHz, the signal filtering value is greater than 80 dBm, and the rated current > 2 A.
[0009] The isolation withstand voltage of the first signal coupler and the second signal coupler > 400 Vac (alternating current), the output impedance is 50 Ω, and the attenuation value of the power line carrier signal is a fixed value within the frequency range of 0.7 MHz to 12 MHz.
[0010] The signal attenuation unit can attenuate the power line carrier signal within the frequency range of 0.7 MHz to 12 MHz. The attenuation range is 0 to 140 dB, the input impedance of the attenuator is 50 Ω, and the output impedance is 50 Ω.
[0011] The signal attenuation unit includes an attenuation value adjuster for adjusting the attenuation intensity value of the power line carrier signal by the attenuator.
[0012] The adjustment granularity of the attenuation intensity value of the power line carrier signal by the attenuation value adjuster is 1 dB.
[0013] The signal attenuation unit uses an adjustable signal attenuator. The operating frequency of the adjustable signal attenuator supports 0 to 3.0 GHz, the attenuation adjustable range is 0 to 90 dB, the attenuation step supports ≥ 1 dB, the insertion loss ≤ 3.5 dB, the voltage standing wave ratio ≤ 1.3, and the rated power is 10 W.
[0014] The signal attenuation unit uses an in-line programmable attenuator, and the attenuation value can be controlled through Ethernet.
[0015] The test host is a fixed carrier emission device, and the emission power spectral density of the fixed carrier emission device is fixed at -45 dBm / Hz.
[0016] The beneficial effects of the present invention compared with the prior art include:
[0017] A power line carrier communication product performance test device proposed by the present invention can, through the settings of technical features such as a first power filter, a first signal coupler, a second power filter, a second signal coupler, a signal attenuation unit, a test host, and a test upper computer, realize the composition of a simple power line carrier communication product performance test device by combining a passive filter, a coupling circuit, and a signal attenuation unit. Thus, it solves the technical problems that the construction process of existing power carrier performance test equipment is relatively complex, the required instruments and equipment are relatively expensive, and it is not convenient to move. It realizes the miniaturization of the test equipment and has the characteristics of simple composition and convenient movement.
[0018] Other beneficial effects in the embodiments of the present utility model will be further described below. Description of the Drawings
[0019] Figure 1 is the schematic diagram of the composition of the power line carrier communication product performance test device in the embodiments of the present utility model;
[0020] Figure 2 It is the circuit diagram of the signal coupler in the embodiment of the present utility model;
[0021] Figure 3 It is the schematic diagram of the composition principle of the test host in the embodiment of the present utility model;
[0022] Figure 4 It is the schematic diagram of the software interface of the test upper computer in the embodiment of the present utility model. Specific implementation manners
[0023] The present invention will be further described below with reference to the accompanying drawings and preferred implementation manners. It should be noted that, without conflict, the embodiments and features in the embodiments of the present application may be combined with each other.
[0024] It should be noted that the orientation terms such as left, right, up, down, top, bottom, etc. in this embodiment are only relative concepts to each other, or are referenced based on the normal use state of the product, and should not be considered restrictive.
[0025] Before introducing the embodiments of the present utility model, the idea of the present utility model is introduced as follows:
[0026] Existing carrier performance test equipment is mostly composed of a large isolation power supply, an active filtering device, and a programmable signal attenuator. It has high measurement accuracy, but is complex to build and the test environment is not easy to move. For daily R & D tests and the production test process of products using power line carrier communication, there is an urgent need for a test equipment that is small in size and convenient to build. The present utility model takes advantage of the fact that passive filters are smaller in size and cheaper than active filters, and replaces the active filter with a passive filter; to solve the impedance matching problem of the passive filter, a coupling circuit is introduced to achieve a standard 50Ω impedance, and a signal attenuator can be connected, allowing users to conveniently adjust the channel attenuation value through the signal attenuator. Therefore, the present utility model combines a passive filter, a coupling circuit, and a signal attenuator to form a simple power line carrier communication product performance test device to achieve miniaturization of the test equipment assembly. Its composition is simple and it is convenient to move. At the same time, control commands can be customized according to different products on the upper computer software as required by customers, and the function test of the product can be realized while testing the carrier performance. Therefore, it can be conveniently applied to the production test stage of products. The embodiments of the present utility model propose a simple power line carrier communication product performance test device that can be quickly built, is convenient to move, and can quickly test the anti-attenuation ability of products with power line carrier communication functions in the R & D debugging stage and the production stage. Its composition is simple, can be quickly built, is small in size, and has the characteristic of being convenient to move; at the same time, it is applicable to various forms of products, can be conveniently applied to the production stage, and can quickly test the anti-attenuation ability of products with power line carrier communication functions and the function test of the products.
[0027] As Figure 1 shown, an embodiment of the present utility model proposes a performance testing device for power line carrier communication products, including: a first power filter 1, a first signal coupler 2, a second power filter 3, a second signal coupler 4, a signal attenuation unit 5, a test host 6, and a test upper computer 7; wherein, the input end of the first power filter is connected to the mains power system, and the output end is connected to the first signal coupler and the test host, for isolating interference signals in the mains power system, ensuring the reliability of testing in the test environment, and at the same time preventing the carrier signal of the test host from crosstalking into the mains power system; the input end of the first signal coupler is connected to the first power filter 1 and the test host 6, and the output end is connected to the signal attenuation unit 5, for extracting the carrier signal sent by the test host from the power cable of the test host; the input end of the second power filter is connected to the power supply of the product under test, and the output end is connected to the second signal coupler and the product under test, for isolating interference signals in the power supply system of the product under test, ensuring the reliability of testing in the test environment, and at the same time preventing the carrier signal of the product under test from crosstalking into the isolated power supply system of the product under test; the input end of the second signal coupler 4 is connected to the second power filter 3 and the device under test, and the output end is connected to the signal attenuation unit 5, for coupling the attenuated carrier signal to the power line of the product under test device; the input end of the signal attenuation unit 5 is connected to the first signal coupler 2, and the output end is connected to the second signal coupler 4, for attenuating the received power line carrier signal according to the set attenuation intensity; there are two ways to set the attenuation intensity. One is that the attenuator is a programmable attenuator, and the attenuation value can be set through the upper computer software; the other attenuator is a manual attenuator, and the attenuation value can be directly set through keys. The test host 6 is connected to the output end of the first power filter 1 and the input end of the first signal coupler 2, for transmitting a specified power line carrier signal. Among them, the "specified power line carrier signal" means that the transmit power spectral density of the transmitting host is a fixed value, such as -45 dBm / Hz. The test upper computer 7 can be installed on a computer and connected to the test host 6 through a computer communication interface (i.e., the communication interface). The computer communication interface can be a USB interface, a serial port, or a network port.
[0028] Among them, the frequency range of the first power filter 1 for power line carrier signals is 0.7 MHz to 12 MHz, the signal filtering value is greater than 80 dBm, and the rated current > 0.5 A.
[0029] The frequency range of the second power filter 3 for power line carrier signals is 0.7 MHz to 12 MHz, the signal filtering value is greater than 80 dBm, and the rated current > 2 A.
[0030] The compositions of the first signal coupler 2 and the second signal coupler 4 are as Figure 2As shown in the figure, it includes input terminal P1, output terminal P2, coupling capacitors C1, C2, C3, C4, signal coupling transformer TE1 (TR632-333, the number of turns of its coil is 10:10, and the numbers 1-6 are the device pin numbers of the coupling transformer), the terminals ANT\ANT1 of the carrier wave, a selectable SMA interface, matching resistors R1-R3, R11-R13, live wire L, and neutral wire N. The attenuation value of the power line carrier signal is a fixed value within the frequency range of 0.7 MHz to 12 MHz; among them, the values of the adjustable coupling capacitors C1, C2, C3, C4 can change the input impedance, and the values of the matching resistors R1-R3, R11-R13 are adjusted to adjust the output impedance. The isolation withstand voltage > AC 400 Vac, the output impedance is 50 Ω, and the attenuation value of the power line carrier signal is a fixed value within the frequency range of 0.7 MHz to 12 MHz. Preferably, the coupling capacitor C1 is adjusted to 220 nF / 310 V, C2 is 220 nF / 310 V, C3 is 4.7 nF / 400 V, C3 is 4.7 nF / 400 V; the matching resistor R1 is adjusted to 51R (ohm), R2 is 51R, R3 is 70R, R11 is 51R; R12 is 51R, R13 is 70R, where "51R" and "70R" are series-parallel combinations to achieve the effect of impedance matching.
[0031] The signal attenuation unit 5 can attenuate the power line carrier signal within the frequency range of 0.7 MHz to 12 MHz. The attenuation range is 0 to 140 dB. The input impedance of the attenuator is 50 Ω, and the output impedance is 50 Ω. It also includes an attenuation value adjuster for adjusting the attenuation intensity value of the attenuator for the power line carrier signal.
[0032] The adjustment granularity of the attenuation intensity value of the power line carrier signal by the attenuation value adjuster is 1 dB.
[0033] The test host 6 can send a power carrier test signal, and the transmission power spectral density of the test signal is a user-set value; at the same time, it can forward the control command of the test upper computer 7 in the form of a power carrier signal. Among them, the user-set value refers to the value set by the user according to the actual test requirements, and the default can be set to -45 dBm / Hz that meets the grid standard.
[0034] The test upper computer 7 can communicate with the test host 6 and send control commands according to the product type.
[0035] The embodiment of the present invention also provides a power carrier communication anti-attenuation ability test device, including: a first power filter 1, a first signal coupler 2, a second power filter 3, a second signal coupler 4, a signal attenuation unit 5, a test host 6, and a test upper computer 7.
[0036] The first power filter 1 and the second power filter 3 are passive filters, which are small in size and can select appropriate rated currents according to the connected devices. In the present utility model, commercially available general power filters can be selected, which are applicable to AC 220V and DC 12V to 300V; the best filtering isolation degree can reach 80dB or above; the signal coupler is a capacitor isolation + coupling transformer, with an input impedance of 5Ω and an output impedance of 50Ω, and the signal attenuation value is a fixed value of 20dB.
[0037] The signal attenuation unit 5 can adopt an adjustable signal attenuator, whose operating frequency supports 0 to 3.0GHz, the attenuation adjustable range is 0 to 90dB, the minimum attenuation step supports 1dB, the insertion loss ≤ 3.5dB, the voltage standing wave ratio ≤ 1.3, and the rated power is 10W. In a preferred embodiment, an Inelox programmable attenuator is adopted, and the attenuation value can be conveniently controlled through Ethernet.
[0038] In some embodiments, the test host 6 is a fixed carrier emission device, adopting the Lihewei LME4015B module, whose transmitted power spectral density is fixed at -45dBm / Hz. Its schematic block diagram is as Figure 3 shown. The fixed carrier emission device includes a power input (220VAC), a flyback switching power supply, a carrier coupling circuit, a carrier communication module (PLC4015B), and a DC-DC converter DCDC. Among them, the "power input (220VAC)" is connected to the "flyback switching power supply" and the "carrier coupling circuit"; the "carrier coupling circuit" is connected to the "carrier communication module (PLC4015B)" to input the carrier signal into the "carrier communication module (PLC4015B)"; the "flyback switching power supply" generates 12V and is connected to the "DC-DC converter DCDC" to generate 3.3V power, and is also connected to the "carrier communication module (PLC4015B)" to supply power to the "carrier communication module (PLC4015B)". In this embodiment, the test host computer 7 adopts the "production test software". Taking the fluorescent lamp as the object to be tested, the "production test software" is used to send test instructions. The production test software is installed on the PC. The test instructions are sent to the test host 6 through the PC serial port UART. The test host 6 converts the serial port signal into a carrier signal, couples it on the 220V AC power supply, and passes through the coupling circuit and the attenuation circuit to the device under test. The interface of the "production test software" is as Figure 4 shown, and test instructions such as "address acquisition", "enter production test mode", "cold light test", "warm light test", and "turn off the light test" can be sent in sequence, and the test results are given.
[0039] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those skilled in the technical field to which the present invention pertains, without departing from the concept of the present invention, several equivalent substitutions or obvious modifications can be made, and as long as the performance or use is the same, they should all be regarded as falling within the protection scope of the present invention.
Claims
1. A performance testing device for power line carrier communication products, characterized in that, It includes a first power filter (1), a first signal coupler (2), a second power filter (3), a second signal coupler (4), a signal attenuation unit (5), a test host (6), and a test upper computer (7); the input end of the first power filter (1) is connected to the mains power system, and the output end is connected to the first signal coupler (2) and the test host (6); the input end of the first signal coupler (2) is connected to the first power filter (1) and the test host (6), and the output end is connected to the signal attenuation unit (5); the input end of the second power filter (3) is connected to the power supply of the product under test, and the output end is connected to the second signal coupler (4) and the product under test; the input end of the second signal coupler (4) is connected to the second power filter (3) and the product under test, and the output end is connected to the signal attenuation unit (5); the test upper computer (7) is connected to the test host (6) through a communication interface, and is used to send test instructions to the test host (6) and give test results.
2. The performance testing device for power line carrier communication products according to claim 1, wherein The frequency range of the first power filter (1) for power line carrier signals is 0.7 MHz to 12 MHz, the signal filtering value is greater than 80 dBm, and the rated current > 0.5 A.
3. The power line carrier communication product performance testing device according to claim 1, characterized in that The frequency range of the second power filter (3) for power line carrier signals is 0.7 MHz to 12 MHz, the signal filtering value is greater than 80 dBm, and the rated current > 2 A.
4. The power line carrier communication product performance testing device according to claim 1, characterized in that The isolation withstand voltage of the first signal coupler (2) and the second signal coupler (4) > 400 Vac AC, the output impedance is 50 Ω, and the attenuation value of the power line carrier signal is a fixed value within the frequency range of 0.7 MHz to 12 MHz.
5. The performance testing device for power line carrier communication products according to claim 1, characterized in that The signal attenuation unit (5) can attenuate the power line carrier signal within the frequency range of 0.7 MHz to 12 MHz, the attenuation range is 0 to 140 dB, the input impedance of the attenuator is 50 Ω, and the output impedance is 50 Ω.
6. The performance testing device for power line carrier communication products according to claim 1, wherein, The signal attenuation unit (5) includes an attenuation value adjuster for adjusting the attenuation intensity value of the attenuator for the power line carrier signal.
7. The power line carrier communication product performance testing device according to claim 6, characterized in that, The adjustment granularity of the attenuation intensity value of the power line carrier signal by the attenuation value adjuster is 1 dB.
8. The power line carrier communication product performance testing device according to claim 1, characterized in that, The signal attenuation unit (5) adopts an adjustable signal attenuator, the operating frequency of the adjustable signal attenuator supports 0 to 3.0 GHz, the attenuation adjustable range is 0 to 90 dB, the attenuation step supports ≥ 1 dB, the insertion loss ≤ 3.5 dB, the voltage standing wave ratio ≤ 1.3, and the rated power ≥ 10 W.
9. The performance testing device for power line carrier communication products according to claim 1, wherein The signal attenuation unit (5) adopts an Inet programmable attenuator and can control the attenuation value through Ethernet.
10. The power line carrier communication product performance testing device according to claim 1, wherein The test host (6) is a fixed carrier emission device, and the emission power spectral density of the fixed carrier emission device is fixed at -45 dBm / Hz.