WO2015109873A1 - 一种电力线载波通信测试装置 - Google Patents
一种电力线载波通信测试装置 Download PDFInfo
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- WO2015109873A1 WO2015109873A1 PCT/CN2014/089069 CN2014089069W WO2015109873A1 WO 2015109873 A1 WO2015109873 A1 WO 2015109873A1 CN 2014089069 W CN2014089069 W CN 2014089069W WO 2015109873 A1 WO2015109873 A1 WO 2015109873A1
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- WO
- WIPO (PCT)
- Prior art keywords
- power line
- carrier communication
- line carrier
- attenuator
- communication device
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/56—Circuits for coupling, blocking, or by-passing of signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5462—Systems for power line communications
- H04B2203/5491—Systems for power line communications using filtering and bypassing
Definitions
- the present invention relates to the field of power line carrier communication technologies, and in particular, to a power line carrier communication test apparatus.
- power line carrier communication technology is well known. It is an off-the-shelf, widest coverage communication channel that can form an intelligent communication network with minimal cost.
- the high attenuation, high noise and time-varying characteristics of the power line are also huge technical obstacles for low-voltage power line carrier communication technology.
- the application of low-voltage power line carrier technology is limited by the carrier frequency, transmission amplitude, harmonic pollution and other indicators, which puts forward a series of requirements and standards for the development, design and production of power line carrier communication products.
- most power line carrier communication products on the market do not have a test device that can be developed from R&D to mass production. The cycle and cost of product development and production are large. It is necessary to develop a power line carrier communication test device for power line carrier. R&D and production testing of communication products.
- the technical problem to be solved by the present invention is to provide a power line carrier communication test apparatus for testing a power line carrier communication device.
- the present invention is implemented as follows:
- a power line carrier communication test device comprises an isolation transformer, a high frequency filter, an attenuator and a detector connected in sequence by a power line;
- the primary side of the isolation transformer is connected to the mains for electrically isolating the utility power
- the high frequency filter is connected to a secondary side of the isolation transformer for filtering high frequency noise on the power line;
- the attenuator is connected to an output end of the high frequency filter for attenuating a carrier signal on the power line;
- the detector is connected to an output end of the attenuator for detecting a carrier signal on the power line;
- a first power line carrier communication device and a second power line carrier communication device for power line carrier communication testing may be respectively connected to a subsequent stage of the filter and a subsequent stage of the attenuator.
- the power line carrier communication test apparatus further includes a computer; the computer is connectable to the first power line carrier communication device or the second power line carrier communication device.
- the computer is connected to the first power line carrier communication device or the second power line carrier communication device via an RS232 serial port.
- the power line carrier communication test apparatus further includes a multimeter for detecting the first power line carrier communication device or the second power line carrier communication device.
- the power line carrier communication test apparatus further includes a spectrum analyzer connected to the detector.
- the power line carrier communication test apparatus further includes an oscilloscope connected to the detector.
- the attenuator is a -60 dB attenuator.
- the power line carrier communication test device provided by the present invention can provide a safe and pure power line communication environment for testing power line carrier communication products, and can provide a standard test environment for testing power line carrier communication products.
- FIG. 1 is a schematic diagram showing the composition of a power line carrier communication test apparatus according to an embodiment of the present invention.
- the power line carrier communication test apparatus includes an isolation transformer 2, a high frequency filter 4, an attenuator 6, and a detector 8 which are sequentially connected by a power line 3.
- the primary side of the isolation transformer 2 is connected to the mains 1 for electrical isolation of the mains 1 to ensure the safety of the test environment.
- the high frequency filter 4 is connected to the secondary side of the isolation transformer 2 for filtering high frequency noise output from the secondary side of the isolation transformer 2 and loaded on the power line 3, thereby providing a clean power line carrier environment.
- the first power line carrier communication device 5 as a transmitting end of the carrier signal, couples the carrier signal to the power line 3, attenuates by the attenuator 6, and outputs it from the attenuator 6.
- the second power line carrier communication device 7 serves as a receiving end of the carrier signal and receives a carrier signal from the output of the attenuator 6.
- the first power line carrier communication device 5 can be connected to the computer 12 through the RS232 serial port 13.
- the computer 12 can download the UID from the first power line carrier communication device 5 through the RS232 serial port 13, or program the first power line carrier communication device 5.
- the second power line carrier communication device 7 can be connected to the multimeter 11 for detecting current and voltage isoelectric parameters of the second power line carrier communication device 7.
- the multimeter 11 can also be connected to the first power line carrier communication device 5, and the computer 12 can also be connected to the second power line carrier communication device 7.
- the attenuator 6 may use a -60 dB attenuator to attenuate the carrier signal to one thousandth of the original, which may be sufficient to simulate the carrier signal on the power line 3. The degree of attenuation.
- a detector 8 is also connected to the output of the attenuator 6 for detecting the carrier signal output from the attenuator 6, and outputting it to the spectrum analyzer 9 and the oscilloscope 10 for carrier signal analysis.
- the carrier signal output from the attenuator 6 is the carrier signal received by the second power line carrier communication device 7.
- the analysis by the spectrum analyzer 9 and the oscilloscope 10 can quantitatively detect the reception performance of the second power line carrier communication device 7 for the carrier signal.
- the transmission distance of the carrier signal is related to the peak-to-peak value of the transmission of the carrier signal.
- the spectrum analysis of the carrier signal by the spectrum analyzer 9 and the attenuation amplitude of the attenuator 6 can also detect the peak value of the carrier signal transmission of the first power line carrier communication device 5. .
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
本发明涉及电力线载波通信技术领域,尤其涉及一种电力线载波通信测试装置。该装置包括通过电力线依次连接的隔离变压器、高频滤波器、衰减器、检波器;所述隔离变压器的原边连接市电,用于对所述市电实行电气隔离;所述高频滤波器与所述隔离变压器的副边连接,用于滤除所述电力线上的高频噪声;所述衰减器与所述高频滤波器的输出端连接,用于对所述电力线上的载波信号进行衰减;所述检波器与所述衰减器的输出端连接,用于检测所述电力线上的载波信号;用于电力线载波通信测试的第一电力线载波通信装置及第二电力线载波通信装置可分别连接于所述滤波器的后级与所述衰减器的后级。
Description
本发明涉及电力线载波通信技术领域,尤其涉及一种电力线载波通信测试装置。
电力线载波通信技术的优势是众所周知的,它是一个现成的、覆盖范围最广的通信信道,在花费最少的情况下就可以组成智能通信网络。但电力线上的高衰减、高噪声、时变性大的特点又是低压电力线载波通信技术的巨大技术障碍。另外,低压电力线载波技术的应用又受到载波频率、发射幅值、谐波污染等指标的限制,这样对于电力线载波通信产品的研发、设计、生产提出了一系列的要求与标准。目前,市场上大部分电力线载波通信产品没有一套能从研发到批量生产的测试装置,产品研发、生产的周期与成本较大,有必要开发了一种电力线载波通信测试装置,用于电力线载波通信产品的研发与生产测试。
本发明所要解决的技术问题是:提供一种用于对电力线载波通信装置进行测试的电力线载波通信测试装置。
本发明是这样实现的:
一种电力线载波通信测试装置,包括通过电力线依次连接的隔离变压器、高频滤波器、衰减器、检波器;
所述隔离变压器的原边连接市电,用于对所述市电实行电气隔离;
所述高频滤波器与所述隔离变压器的副边连接,用于滤除所述电力线上的高频噪声;
所述衰减器与所述高频滤波器的输出端连接,用于对所述电力线上的载波信号进行衰减;
所述检波器与所述衰减器的输出端连接,用于检测所述电力线上的载波信号;
用于电力线载波通信测试的第一电力线载波通信装置及第二电力线载波通信装置,可分别连接于所述滤波器的后级与所述衰减器的后级。
进一步地,所述电力线载波通信测试装置还包括计算机;所述计算机可与所述第一电力线载波通信装置或第二电力线载波通信装置连接。
进一步地,所述计算机通过RS232串口与所述第一电力线载波通信装置或第二电力线载波通信装置连接。
进一步地,所述电力线载波通信测试装置还包括用于对所述第一电力线载波通信装置或第二电力线载波通信装置进行检测的万用表。
进一步地,所述电力线载波通信测试装置还包括与所述检波器连接的频谱仪。
进一步地,所述电力线载波通信测试装置还包括与所述检波器连接的示波器。
进一步地,所述衰减器为-60dB衰减器。
与现有技术相比,本发明提供的电力线载波通信测试装置可为电力线载波通信产品的测试提供一个安全、纯净的电力线通信环境,可为电力线载波通信产品的测试提供一个标准的测试环境。
图1:本发明实施例提供的电力线载波通信测试装置组成示意图。
为了使本发明的目的、技术方案及优点更加清楚明白,以下结合附图及实施例,对本发明进行进一步详细说明。应当理解,此处所描述的具体实施例仅用于解释本发明,并不用于限定本发明。
如图1所示,本发明提供的电力线载波通信测试装置包括通过电力线3依次连接的隔离变压器2、高频滤波器4、衰减器6、检波器8。隔离变压器2的原边连接市电1,用于对市电1进行电气隔离,从而保证测试环境的安全。高频滤波器4与隔离变压器2的副边连接,用于滤除从隔离变压器2的副边输出并加载于电力线3上的市电上的高频噪声,从而提供一个纯净的电力线载波环境。第一电力线载波通信装置5作为载波信号的发送端,将载波信号耦合到电力线3中,经过衰减器6衰减后从衰减器6输出。第二电力线载波通信装置7作为载波信号的接收端,从衰减器6的输出端接收载波信号。第一电力线载波通信装置5可通过RS232串口13连接计算机12,计算机12可通过RS232串口13从第一电力线载波通信装置5下载UID,或者对第一电力线载波通信装置5进行程序烧录。第二电力线载波通信装置7可连接万用表11用于检测第二电力线载波通信装置7的电流及电压等电参数。当然,万用表11也可连接于第一电力线载波通信装置5,计算机12也可连接于第二电力线载波通信装置7。为测试第二电力线载波通信装置7接收载波信号的灵敏度,衰减器6可选用-60dB衰减器,可将载波信号衰减到原来的千分之一,该衰减幅度可足够模拟载波信号在电力线3上的衰减程度。在衰减器6的输出端还连接有检波器8,用于检出衰减器6输出的载波信号,并将其输出到频谱仪9及示波器10中进行载波信号分析。衰减器6输出的载波信号即为第二电力线载波通信装置7所接收的载波信号,通过频谱仪9及示波器10的分析,可定量检测出第二电力线载波通信装置7对载波信号的接收性能。载波信号的传输距离与载波信号发送端的发送峰峰值有关,通过频谱仪9对载波信号的频谱分析,结合衰减器6的衰减幅度还可检测出第一电力线载波通信装置5的载波信号发送峰峰值。
以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明的保护范围之内。
Claims (7)
- 一种电力线载波通信测试装置,其特征在于,包括通过电力线依次连接的隔离变压器、高频滤波器、衰减器、检波器;所述隔离变压器的原边连接市电,用于对所述市电实行电气隔离;所述高频滤波器与所述隔离变压器的副边连接,用于滤除所述电力线上的高频噪声;所述衰减器与所述高频滤波器的输出端连接,用于对所述电力线上的载波信号进行衰减;所述检波器与所述衰减器的输出端连接,用于检测所述电力线上的载波信号;用于电力线载波通信测试的第一电力线载波通信装置及第二电力线载波通信装置,可分别连接于所述滤波器的后级与所述衰减器的后级。
- 如权利要求1所述的电力线载波通信测试装置,其特征在于,还包括计算机;所述计算机可与所述第一电力线载波通信装置或第二电力线载波通信装置连接。
- 如权利要求2所述的电力线载波通信测试装置,其特征在于,所述计算机通过RS232串口与所述第一电力线载波通信装置或第二电力线载波通信装置连接。
- 如权利要求1所述的电力线载波通信测试装置,其特征在于,还包括用于对所述第一电力线载波通信装置或第二电力线载波通信装置进行检测的万用表。
- 如权利要求1所述的电力线载波通信测试装置,其特征在于,还包括与所述检波器连接的频谱仪。
- 如权利要求1所述的电力线载波通信测试装置,其特征在于,还包括与所述检波器连接的示波器。
- 如权利要求1所述的电力线载波通信测试装置,其特征在于,所述衰减器为-60dB衰减器。
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CN201420051366.7U CN203691397U (zh) | 2014-01-26 | 2014-01-26 | 一种电力线载波通信测试装置 |
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CN106788814A (zh) * | 2017-01-20 | 2017-05-31 | 许昌许继昌南通信设备有限公司 | 电力线载波通信的碰撞干扰测试装置 |
CN107919928A (zh) * | 2017-12-20 | 2018-04-17 | 国网江苏省电力有限公司电力科学研究院 | 一种载波信号测试装置及测试方法 |
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