CN107528641A - A kind of signal power detection method of Utilities Electric Co.'s acquisition terminal - Google Patents
A kind of signal power detection method of Utilities Electric Co.'s acquisition terminal Download PDFInfo
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Abstract
本发明公开了一种电力公司采集终端的信号功率检测方法，其特征在于以下技术流程，将需要进行功率检测的载波信号进行前级采样，样后的载波信号进行滤波衰减，混频器将信号进行混频后送入10.7M窄带滤波器，经过10.7M窄带滤波器后的信号通过放大器进行放大，然后送入到AD进行功率检测，通过两次的滤波处理，尽可能的减小镜像频率和信号谐波对测量的影响，减小测量结果的误差，载波信号与本振信号在送入到混频器的（RF）和（LO）的输入端口之前分别通过变频器对信号的功率进行放大，使得送入混频器的RF、LO信号满足混频器对信号功率的要求，否则会导致功率检测误差、降低检测动态范围等问题。The invention discloses a method for detecting signal power of an electric power company acquisition terminal, which is characterized in that the following technical process, the carrier signal that needs power detection is sampled at the previous stage, the sampled carrier signal is filtered and attenuated, and the signal mixer converts the signal After mixing, it is sent to the 10.7M narrowband filter. The signal after the 10.7M narrowband filter is amplified by the amplifier, and then sent to the AD for power detection. Through two filtering processes, the image frequency and The influence of signal harmonics on the measurement reduces the error of the measurement results. The carrier signal and the local oscillator signal are respectively amplified by the frequency converter before being sent to the (RF) and (LO) input ports of the mixer. , so that the RF and LO signals sent to the mixer meet the signal power requirements of the mixer, otherwise it will cause power detection errors, reduce the detection dynamic range and other problems.
Description
技术领域technical field
本发明涉及信号检测技术技术领域，具体为一种电力公司采集终端的信号功率检测方法。The invention relates to the technical field of signal detection technology, in particular to a method for detecting signal power of a collection terminal of an electric power company.
背景技术Background technique
在电力公司内需要对采集终端的信号功率进行检测，以便确定采集终端的使用情况，方便进行维护或是维修，信号功率的检测通常是采用窄带接收机的方案，频响的性能较好，但是需要增加本振电路，电路的复杂性有所增加，而且还会出现镜像频率和信号谐波对测量产生影响，影响检测的结果，为此，我们提出一种电力公司采集终端的信号功率检测方法。In the power company, it is necessary to detect the signal power of the collection terminal in order to determine the use of the collection terminal and facilitate maintenance or repair. The detection of signal power usually adopts a narrowband receiver solution, which has a good frequency response, but It is necessary to increase the local oscillator circuit, the complexity of the circuit has increased, and the image frequency and signal harmonics will affect the measurement and affect the detection results. Therefore, we propose a signal power detection method for the power company's collection terminal .
发明内容Contents of the invention
本发明的目的在于提供一种电力公司采集终端的信号功率检测方法，以解决上述背景技术中提出的问题。The purpose of the present invention is to provide a signal power detection method of a power company acquisition terminal to solve the problems raised in the above-mentioned background technology.
为实现上述目的，本发明提供如下技术方案：一种电力公司采集终端的信号功率检测方法：In order to achieve the above object, the present invention provides the following technical solution: a signal power detection method of a power company collection terminal:
第一步，将需要进行功率检测的载波信号进行前级采样；The first step is to perform pre-sampling of the carrier signal that needs power detection;
第二步，将采样后的载波信号进行滤波衰减；The second step is to filter and attenuate the sampled carrier signal;
第三步，将载波信号送入混频器的（RF）输入端口；In the third step, the carrier signal is sent to the (RF) input port of the mixer;
第四步，根据不同载波信号的载波频率设置相对应的本振信号，将本振信号送入到混频器（LO）输入端；The fourth step is to set the corresponding local oscillator signal according to the carrier frequency of different carrier signals, and send the local oscillator signal to the input terminal of the mixer (LO);
第五步，混频器将信号进行混频后送入10.7M窄带滤波器；In the fifth step, the mixer mixes the signal and sends it to the 10.7M narrowband filter;
第六步，经过10.7M窄带滤波器后的信号通过放大器进行放大，然后送入到AD进行功率检测。In the sixth step, the signal after the 10.7M narrowband filter is amplified by the amplifier, and then sent to the AD for power detection.
优选的，第一步的具体操作方法为：使用信号采样器对采集终端的载波信号进行采样。Preferably, the specific operation method of the first step is: use a signal sampler to sample the carrier signal of the acquisition terminal.
优选的，第二步的具体操作方法为：将采样后的载波信号先通过前置滤波器进行处理，然后使用低噪声放大器对载波信号进行放大，放大后的载波信号再次经过镜像抑制滤波器进行处理。Preferably, the specific operation method of the second step is: process the sampled carrier signal through a pre-filter first, then use a low-noise amplifier to amplify the carrier signal, and then pass the amplified carrier signal through the image rejection filter again. deal with.
优选的，第三步的具体操作方法为：经过处理后的载波信号经过变频器将载波信号的功率进行放大处理后，送入混频器的（RF）输入端口。Preferably, the specific operation method of the third step is: after the processed carrier signal is amplified by the frequency converter, the power of the carrier signal is amplified, and then sent to the (RF) input port of the mixer.
优选的，第四步的具体操作方法为：根据所要检测的载波信号的载波频率设置相对应的本振信号，本振信号先通过变频器对信号的功率进行放大处理，然后送入到混频器（LO）的输入端口。Preferably, the specific operation method of the fourth step is: according to the carrier frequency of the carrier signal to be detected, the corresponding local oscillator signal is set, and the local oscillator signal is first amplified by the frequency converter, and then sent to the frequency mixer to the input port of the device (LO).
优选的，第五步的具体操作方法为：混频器将所需要检测的载波信号与本振信号进行混频处理后，送入到10.7M窄带滤波器。Preferably, the specific operation method of the fifth step is: the mixer mixes the carrier signal to be detected with the local oscillator signal, and sends it to the 10.7M narrowband filter.
优选的，第六步的具体操作方法为：经过10.7M窄带滤波器进行滤波处理后的信号已成为中频信号，中频信号由对数放大器进行放大后送入到AD608的主体芯片内进行信号功率的检测。Preferably, the specific operation method of the sixth step is: the signal processed by the 10.7M narrowband filter has become an intermediate frequency signal, and the intermediate frequency signal is amplified by a logarithmic amplifier and then sent to the main chip of AD608 for signal power adjustment. detection.
与现有技术相比，本发明的有益效果是；一种电力公司采集终端的信号功率检测方法，使用信号采样器对需要进行检测的载波信号进行采样，再将经过采样后的载波信号通过前置滤波器进行初次处理，经过初次处理后的载波信号通过低噪声放大器放大，然后再使放大后的载波信号通过镜像抑制滤波器进行再次处理，通过两次的滤波处理，尽可能的减小镜像频率和信号谐波对测量的影响，减小测量结果的误差，然后将载波信号送入到混频器（RF）的输入端口，根据所要检测的载波信号的载波频率设置相对应的本振信号后，将本振信号送入到混频器（LO）的输入端口，载波信号与本振信号在送入到混频器的（RF）和（LO）的输入端口之前分别通过变频器对信号的功率进行放大，使得送入混频器的RF、LO信号满足混频器对信号功率的要求，否则会导致功率检测误差、降低检测动态范围等问题，信号经过混频器与10.7M窄带滤波器和对数放大器的依次处理后，通过AD608主体芯片对信号的功率进行检测，通过本信号功率的检测方法，使对电力公司的采集终端的信号功率检测更加准确，减小检测过程中的误差。Compared with the prior art, the beneficial effect of the present invention is: a method for detecting signal power of a collection terminal of an electric power company, using a signal sampler to sample the carrier signal to be detected, and then passing the sampled carrier signal through the front Set the filter for initial processing, the carrier signal after the initial processing is amplified by the low-noise amplifier, and then the amplified carrier signal is processed again by the image suppression filter, and the image is reduced as much as possible through two filtering processes. The influence of frequency and signal harmonics on the measurement can reduce the error of the measurement result, and then send the carrier signal to the input port of the mixer (RF), and set the corresponding local oscillator signal according to the carrier frequency of the carrier signal to be detected Finally, the local oscillator signal is sent to the input port of the mixer (LO), and the carrier signal and the local oscillator signal are respectively passed through the frequency converter before being sent to the input port of the mixer (RF) and (LO). The power of the mixer is amplified, so that the RF and LO signals sent to the mixer meet the signal power requirements of the mixer, otherwise it will cause power detection errors and reduce the detection dynamic range. The signal passes through the mixer and 10.7M narrow-band filter After the sequential processing of the amplifier and the logarithmic amplifier, the power of the signal is detected by the AD608 main chip. Through the detection method of the signal power, the detection of the signal power of the acquisition terminal of the electric power company is more accurate, and the error in the detection process is reduced. .
具体实施方式detailed description
下面将结合实施例对本发明进行进一步描述，但本发明的保护范围并不限于此。The present invention will be further described below in conjunction with examples, but the protection scope of the present invention is not limited thereto.
一种电力公司采集终端的信号功率检测方法，其特征在于以下技术流程特点：A signal power detection method for an electric power company acquisition terminal, characterized in that the following technical process characteristics:
第一步，将需要进行功率检测的载波信号进行前级采样；The first step is to perform pre-sampling of the carrier signal that needs power detection;
第二步，将采样后的载波信号进行滤波衰减；The second step is to filter and attenuate the sampled carrier signal;
第三步，将载波信号送入混频器的（RF）输入端口；In the third step, the carrier signal is sent to the (RF) input port of the mixer;
第四步，根据不同载波信号的载波频率设置相对应的本振信号，将本振信号送入到混频器（LO）输入端；The fourth step is to set the corresponding local oscillator signal according to the carrier frequency of different carrier signals, and send the local oscillator signal to the input terminal of the mixer (LO);
第五步，混频器将信号进行混频后送入10.7M窄带滤波器；In the fifth step, the mixer mixes the signal and sends it to the 10.7M narrowband filter;
第六步，经过10.7M窄带滤波器后的信号通过放大器进行放大，然后送入到AD进行功率检测。In the sixth step, the signal after the 10.7M narrowband filter is amplified by the amplifier, and then sent to the AD for power detection.
具体而言，第一步的具体操作方法为：使用信号采样器对采集终端的载波信号进行采样。Specifically, the specific operation method of the first step is: use a signal sampler to sample the carrier signal of the acquisition terminal.
具体而言，第二步的具体操作方法为：将采样后的载波信号先通过前置滤波器进行处理，通过前置滤波器对载波信号进行初次的滤波处理，然后使用低噪声放大器对进行滤波后微弱的载波信号进行放大，放大后的载波信号再次经过镜像抑制滤波器进行处理，通过镜像抑制滤波器滤除镜像干扰信号。Specifically, the specific operation method of the second step is: first process the sampled carrier signal through a pre-filter, perform initial filtering on the carrier signal through the pre-filter, and then use a low-noise amplifier to filter the After that, the weak carrier signal is amplified, and the amplified carrier signal is processed by the image suppression filter again, and the image interference signal is filtered out by the image suppression filter.
具体而言，第三步的具体操作方法为：经过处理后的载波信号经过变频器将载波信号的功率进行放大处理后，送入混频器的（RF）输入端口。Specifically, the specific operation method of the third step is: after the processed carrier signal is amplified by the frequency converter, the power of the carrier signal is amplified, and then sent to the (RF) input port of the mixer.
具体而言，第四步的具体操作方法为：根据所要检测的载波信号的载波频率设置相对应的本振信号，本振信号先通过变频器对信号的功率进行放大处理，然后送入到混频器（LO）的输入端口，送入到混频器的（RF）输入端口内的载波信号和混频器（LO）输入端口内的本振信号都分别经过变频器对功率进行放大处理，使得送入混频器的RF、LO信号满足混频器对信号功率的要求，否则会导致功率检测误差、降低检测动态范围等问题。Specifically, the specific operation method of the fourth step is: set the corresponding local oscillator signal according to the carrier frequency of the carrier signal to be detected. The local oscillator signal is first amplified by the frequency converter, and then sent to the mixer The input port of the frequency converter (LO), the carrier signal sent to the (RF) input port of the mixer and the local oscillator signal in the input port of the mixer (LO) are respectively amplified by the frequency converter. Make the RF and LO signals sent to the mixer meet the signal power requirements of the mixer, otherwise it will cause power detection errors, reduce the detection dynamic range and other problems.
具体而言，第五步的具体操作方法为：混频器将所需要检测的载波信号与本振信号进行混频处理后，送入到10.7M窄带滤波器。Specifically, the specific operation method of the fifth step is: the mixer mixes the carrier signal to be detected with the local oscillator signal, and sends them to the 10.7M narrowband filter.
具体而言，第六步的具体操作方法为：经过10.7M窄带滤波器进行滤波处理后的信号已成为中频信号，中频信号由对数放大器进行放大后送入到AD608的主体芯片内进行信号功率的检测，AD608主体芯片的混频输入和功率检测的动态范围达到80dB，RF信号频率范围达到500M，RSSI时间为200nS，可进行对信号的功率进行快速的检测，同时，通过之前的处理，减小检测的误差，使检测的结果更加准确。Specifically, the specific operation method of the sixth step is: the signal filtered by the 10.7M narrowband filter has become an intermediate frequency signal, and the intermediate frequency signal is amplified by the logarithmic amplifier and sent to the main chip of AD608 for signal power. The detection, the dynamic range of the mixing input and power detection of the AD608 main chip reaches 80dB, the RF signal frequency range reaches 500M, and the RSSI time is 200nS, which can quickly detect the power of the signal. At the same time, through the previous processing, reduce The small detection error makes the detection result more accurate.
工作原理：一种电力公司采集终端的信号功率检测方法，使用信号采样器对需要进行检测的载波信号进行采样，再将经过采样后的载波信号通过前置滤波器进行初次处理，经过初次处理后的载波信号通过低噪声放大器放大，然后再使放大后的载波信号通过镜像抑制滤波器进行再次处理，通过两次的滤波处理，尽可能的减小镜像频率和信号谐波对测量的影响，减小测量结果的误差，通过镜像抑制滤波器进行处理后的载波信号通过变频器将载波信号的功率进行放大处理后，送入混频器的（RF）输入端口，同时，根据所要检测的载波信号的载波频率设置相对应的本振信号，本振信号先通过变频器对信号的功率进行放大处理，然后送入到混频器（LO）的输入端口，送入到混频器的（RF）输入端口内的载波信号和混频器（LO）输入端口内的本振信号都分别经过变频器对功率进行放大处理，使得送入混频器的RF、LO信号满足混频器对信号功率的要求，否则会导致功率检测误差、降低检测动态范围等问题，混频器将载波信号与本振信号进行混频后，送入到10.7M窄带滤波器，经过10.7M窄带滤波器进行滤波处理，使信号变为中频信号，中频信号由对数放大器进行放大后送入到AD608的主体芯片内进行信号功率的检测。Working principle: A signal power detection method for the collection terminal of the electric power company. The signal sampler is used to sample the carrier signal that needs to be detected, and then the sampled carrier signal is processed through the pre-filter for the first time. After the initial processing The carrier signal of the signal is amplified by the low noise amplifier, and then the amplified carrier signal is processed again through the image rejection filter. After two filtering processes, the influence of the image frequency and signal harmonics on the measurement is reduced as much as possible, and the The error of the measurement result is small, the carrier signal processed by the image suppression filter is amplified by the frequency converter, and then sent to the (RF) input port of the mixer. At the same time, according to the carrier signal to be detected The carrier frequency setting corresponds to the local oscillator signal. The local oscillator signal is first amplified by the frequency converter, and then sent to the input port of the mixer (LO), and then sent to the (RF) of the mixer. The carrier signal in the input port and the local oscillator signal in the input port of the mixer (LO) are respectively amplified by the frequency converter, so that the RF and LO signals sent to the mixer meet the signal power requirements of the mixer. Requirements, otherwise it will lead to problems such as power detection errors and reduced detection dynamic range. After the mixer mixes the carrier signal and the local oscillator signal, it is sent to the 10.7M narrow-band filter, and the 10.7M narrow-band filter is filtered. Make the signal into an intermediate frequency signal, and the intermediate frequency signal is amplified by the logarithmic amplifier and then sent to the main chip of AD608 for signal power detection.
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，根据本发明的技术方案及其发明构思加以等同替换或改变，都应涵盖子本发明的保护范围之内。The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concept thereof shall be covered within the protection scope of the present invention.
Claims (7)
- A kind of 1. signal power detection method of Utilities Electric Co.'s acquisition terminal, it is characterised in that following techniqueflow feature：The first step, it would be desirable to which the carrier signal for carrying out power detection carries out prime sampling；Second step, the carrier signal after sampling is filtered decay；3rd step, carrier signal is sent into frequency mixer（RF）Input port；4th step, corresponding local oscillation signal is set according to the carrier frequency of different carrier signals, local oscillation signal is sent to mixed Frequency device（LO）Input；5th step, frequency mixer are sent into 10.7M narrow band filters after signal is mixed；6th step, the signal after 10.7M narrow band filters are amplified by amplifier, are then fed into AD and are carried out power Detection.
- A kind of 2. signal power detection method of Utilities Electric Co.'s acquisition terminal according to claim 1, it is characterised in that the The concrete operation method of one step is：The carrier signal of acquisition terminal is sampled using signal sampler.
- A kind of 3. signal power detection method of Utilities Electric Co.'s acquisition terminal according to claim 1, it is characterised in that the The concrete operation method of two steps is：Carrier signal after sampling is first passed through into prefilter to be handled, then using low noise Acoustic amplifier is amplified to carrier signal, and the carrier signal after amplification again passes by image-reject filter and handled.
- A kind of 4. signal power detection method of Utilities Electric Co.'s acquisition terminal according to claim 1, it is characterised in that the The concrete operation method of three steps is：The power of carrier signal is amplified place by carrier signal after treatment by frequency converter After reason, frequency mixer is sent into（RF）Input port.
- A kind of 5. signal power detection method of Utilities Electric Co.'s acquisition terminal according to claim 1, it is characterised in that the The concrete operation method of four steps is：Corresponding local oscillation signal is set according to the carrier frequency for the carrier signal to be detected, this The signal that shakes first passes through frequency converter and is amplified processing to the power of signal, is then fed into frequency mixer（LO）Input port.
- A kind of 6. signal power detection method of Utilities Electric Co.'s acquisition terminal according to claim 1, it is characterised in that the The concrete operation method of five steps is：After the carrier signal of required detection and local oscillation signal are carried out Frequency mixing processing by frequency mixer, send Enter to 10.7M narrow band filters.
- A kind of 7. signal power detection method of Utilities Electric Co.'s acquisition terminal according to claim 1, it is characterised in that the The concrete operation method of six steps is：Signal after 10.7M narrow band filters are filtered processing turns into intermediate-freuqncy signal, in Frequency signal is sent to the detection that signal power is carried out in AD608 main body chip after being amplified by logafier.
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| CN201710796105.6A Pending CN107528641A (en) | 2017-09-06 | 2017-09-06 | A kind of signal power detection method of Utilities Electric Co.'s acquisition terminal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107689816A (en) * | 2017-09-27 | 2018-02-13 | 国网宁夏电力公司电力科学研究院 | A kind of signal power detection method |
| CN109725191A (en) * | 2018-12-28 | 2019-05-07 | 国网黑龙江省电力有限公司七台河供电公司 | A kind of electric power data acquisition method and system based on logafier |
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| WO2000019629A1 (en) * | 1998-09-30 | 2000-04-06 | Conexant Systems, Inc. | Using a single low-noise amplifier in a multi-band wireless station |
| US20120313680A1 (en) * | 2010-03-17 | 2012-12-13 | Hiroshi Kodama | Power detection circuit and power detection method |
| CN103227664A (en) * | 2013-04-23 | 2013-07-31 | 国家电网公司 | Field sampling, isolation and power detection system of signal of low-voltage power line |
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| WO2000019629A1 (en) * | 1998-09-30 | 2000-04-06 | Conexant Systems, Inc. | Using a single low-noise amplifier in a multi-band wireless station |
| US20120313680A1 (en) * | 2010-03-17 | 2012-12-13 | Hiroshi Kodama | Power detection circuit and power detection method |
| CN103227664A (en) * | 2013-04-23 | 2013-07-31 | 国家电网公司 | Field sampling, isolation and power detection system of signal of low-voltage power line |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107689816A (en) * | 2017-09-27 | 2018-02-13 | 国网宁夏电力公司电力科学研究院 | A kind of signal power detection method |
| CN109725191A (en) * | 2018-12-28 | 2019-05-07 | 国网黑龙江省电力有限公司七台河供电公司 | A kind of electric power data acquisition method and system based on logafier |
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Application publication date: 20171229 |