Non-home-entry type mis-sort detector of modulating and generating low-frequency characteristic signal

Abstract

The invention relates to the field of power system detecting equipment, in particular to a non-home-entry type mis-sort detector of modulating and generating a low-frequency characteristic signal. Themis-sort detector is used for detecting whether a correspondence between a user's electric meter and a user's house is mis-sort. A host transmitting end is set at two sides of an air switch at the lower portion on the side of the user's electric meter. The host transmitting end transmits low-frequency characteristic signals. The low-frequency characteristic signals are transmitted through a signal transmission line. A handheld detecting end detects and receives an effective low-frequency characteristic signal on the signal transmission line. The source of the low-frequency characteristic signal is determined according to the strength and direction of the detected low-frequency characteristic signal so as to confirm whether the correspondence between the user's electric meter and the user's house is consistent and confirm whether the mis-sort exists between the user's electric meter and the user's house. Compared with the prior art, the non-home-entry type mis-sort detector of modulating and generating the low-frequency characteristic signal in the invention adopts low-frequency phase-to-phase modulation to generate the low-frequency characteristic pulse signal within 500 Hz to beinput into a user line, and greatly improves the detection accuracy.

Description

【Technical field】 [0001] The invention relates to the field of electric power system detection equipment, in particular to a non-entry type serial household detector which modulates and generates low-frequency characteristic signals. 【Background technique】 [0002] At present, the serial household detectors on the market are generally home-type serial household detectors. During the test process, the household-type serial household detectors are connected to the device through the meter terminal and the user terminal at the same time, and are detected by communication between the two devices. The meter corresponds to the user to verify whether the meter and the user are linked together. This requires entering the user's residence during the test process, and internal cooperation can be used for detection. In real life, the user does not want outsiders to enter the residence to affect life or the user is unmanned at work. At home, it is impossible to cooperate with the testin...

AI Technical Summary

Problems solved by technology

In practical applications, there is a relatively long distance between the electric meter of many users and the user's house. Currently, the non-residential serial household detector used in the market uses a high-frequency carrier signal to transmit a long distance on the user line. After being interfered by the power load on the power line, the electromagnetic environment and other factors, the user's residence is already very weak or no signal is emitted in the space, and it is difficult to measure accurately or detect no effective signal without entering the home.

[0005] 2. Signal crosstalk affects detection accuracy

The method of using high-frequency carrier to block the signal through the wave trap does not go up to the incoming line of the meter and then enters other user lines, there is signal leakage at the wave blocking end, and the signal is serialized to other users, causing misjudgment, because in the case of uninterrupted power The lower user lines are connected, and if they are not connected, it means that the user is powered off. In this case, the signal will be serialized to the incoming line of the meter and then into other user lines, which will affect the detection success rate.

[0006] 3. Signal cross-line coupling affects detection accuracy

The lines in the user's meter box are bundled together and enter the pipeline and then distributed to each user's home. The high-frequency carrier signal is input to the user's line, and the adjacent line can sense the high-frequency signal, and then transmit it to each user's residence through the user's line. , the higher the signal frequency, the greater the coupling interference, which affects the detection success rate

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