Remote digital kernel phase system

[0018] The following describes the present invention in detail based on the drawings and embodiments, and the purpose and effects of the present invention will be more obvious.

[0019] The remote digital nuclear phase system is composed of two parts: a reference terminal device and a mobile terminal device. The reference terminal device is composed of a GPS receiving adapter 1 and a reference terminal host 2. The mobile terminal device is composed of a GPS signal receiving and sending module 3, a phase detector 4, a mobile communication host 5, a handheld test device 6 and a mobile phone 7.

[0020] The GPS receiving adapter 1 is connected to the reference host 2 through the R8485 bus, and is powered by the reference host. The GPS receiving adapter 1 is composed of a GPS dedicated receiving module M11, a power adjustment circuit M12, and a communication interface circuit M13. The GPS dedicated receiving module M11 is connected to a dedicated antenna to receive GPS signals. The power adjustment circuit M12 stabilizes the input power and supplies power to other modules. The communication interface circuit M14 converts the TTL level to the RS485 level, which is convenient for reliable data transmission.

[0021] The reference host 2 is composed of a general-purpose single-chip microcomputer M21, GPS signal interface module M22, power line interface circuit M23, modulation and demodulation circuit M24, telephone interface circuit M25 and indicating circuit M26; GPS signal interface module M22 and GPS receiving adapter 1 are connected via RS485 bus ; The power line interface circuit M23 is connected to the AC 75~380V power line signal to detect its phase signal; the telephone interface circuit M25 is connected to the fixed telephone line to realize remote communication; the general-purpose single-chip M21 directly controls the GPS signal interface module M22, the power line interface circuit M23, and modulation and demodulation The circuit M24, the telephone interface circuit M25 and the indicating circuit M26 coordinate the work among them.

[0022] The GPS receiving transponder 3 is composed of a general-purpose single-chip microcomputer M31, a GPS receiver M32, a radio frequency transmitting module M33, a power control circuit M34, a button control circuit M35 and an indication circuit M36. The general-purpose single-chip M31 detects whether the GPS receiver M32 is synchronized, and when it is judged to be synchronized, it encodes the GPS second pulse signal and sends it to the mobile communication host through the radio frequency transmitting module M33.

[0023] The mobile communication host 4 is composed of a general-purpose single-chip M41, radio frequency receiving module M42, modulation and demodulation circuit M43, mobile phone voice interface M44, power interface module M45, radio frequency transmitting module M46, power control circuit M47, button control circuit M48 and indicating circuit M49 Composition; the general-purpose single-chip M41 receives the reference terminal signal through the modulation and demodulation circuit M43, and at the same time recovers the phase signal of the reference terminal power line L1 according to the local GPS second pulse, and sends it out through the radio frequency transmitting module M46, which is received by the handheld test equipment.

[0024] The phase detector 5 is composed of a general-purpose single-chip microcomputer M51, a radio frequency transmitting module M52, an electroscope module M53, a power supply module M54, a self-check signal generation module M55, an acousto-optic signal indicating module M56 and a sensing contact terminal M57; the general-purpose single-chip M51 pairs wireless signals The modulation sending module M52 directly controls; the electroscope module M53 and the power supply module M54 realize power-on start together; the self-check signal generation module M55 is enabled by a button to detect whether the detector functions normally.

[0025] The handheld test equipment 6 is composed of a general-purpose single-chip microcomputer M61, radio frequency receiving modules M62, M63, power control circuit M64, PC serial communication module M65, data storage module M66, system reference clock module M67, display module M68 and keyboard M69; general-purpose single-chip microcomputer M61 receives the signals from the wireless signal demodulation receiving modules M62 and M63, and controls the working state of the power control circuit M64; the human-computer interaction is carried out through the display module M68 and the keyboard M69.

[0026] The system principle and work flow are:

[0027] First, the mobile phone 7 of the mobile terminal calls the reference terminal to initiate a request for measurement work and establish a communication link. The reference end host receives the 50Hz/60Hz power line signal T1 from the reference end power line L1, and receives the second pulse signal 1PPS through the GPS receiving adapter 1, such as Figure 8 As shown, 1PPS is a pulse signal that occurs once per second, and T1 is the signal obtained after the 50Hz/60Hz power line signal is compared through zero crossing; T1 is based on the rising edge of 1PPS to obtain the time difference Δt1 between the two signals. The signal with the value of Δt1 undergoes digital framing processing and modulation, and is sent to the mobile phone 7 through the telephone network.

[0028] Then, the GPS receiving transponder 3 of the mobile terminal performs wireless digital modulation of the 1PPS signal and sends it to the mobile communication host 4. At the same time, the mobile communication host 4 obtains Δt1' through the mobile phone 7, Δt1'=Δt1, and the mobile terminal also uses 1PPS as the benchmark According to Δt1', the 50Hz/60Hz power line signal of the reference terminal is recovered, which is marked as T1'.

[0029] Then, the mobile communication host 4 performs wireless digital modulation on the T1' signal, and sends it to the handheld measuring device 6. At the same time, the phase detector 5 receives the 50Hz/60Hz power line signal T2 from the mobile terminal power line L2, and wirelessly digitally modulates the T2 signal, and sends it to the handheld test equipment 6 as well. The hand-held measuring device 6 uses the T1' signal as a decision criterion to measure the time difference Δt2 between T2 and T1', and then converts the time difference into a phase difference through the formula: =360fΔt2. Then compare the phase difference value with the preset phase difference threshold of the system, and make a decision whether it is in phase.

[0030] Finally, the test result is displayed on the LCD screen, which realizes the quantitative measurement of the phase difference value. The display content of the system test results includes: phase difference value, leading or lagging, whether in phase and phase coordinate prompts, etc. In addition, the handheld test equipment is connected to a computer (PC), which can perform interactive operation of test records to achieve stronger record storage, data management and analysis functions, and computer software can also realize the time, threshold, etc. of the handheld test equipment Setting and control of main parameters.

[0031] The above-mentioned embodiments are used to explain the present invention, not to limit the present invention. Any modification and change made to the present invention within the spirit of the present invention and the protection scope of the claims shall fall into the protection scope of the present invention.