CN206990659U - A kind of wireless divider with grading ring transmitting antenna - Google Patents

Abstract

A wireless voltage divider with a voltage equalizing loop transmitting antenna, comprising a voltage equalizing loop transmitting antenna located at the upper part, an insulating cylinder located at the middle part, and a voltage signal processing part located at the lower part. The leading end of the transmitting antenna of the equalizing loop is connected to the first high frequency wave blocking inductor L1. A high-voltage capacitor C1 and a low-voltage capacitor C2 are arranged inside the insulating cylinder. The voltage signal processing part includes a metal shielding shell, in which a power frequency voltage signal processing circuit and a wireless signal transmitting circuit are arranged. The metal shielding shell is provided with a grounding terminal and an external terminal for voltage output. The utility model is a wireless voltage divider with a voltage equalizing ring transmitting antenna, which does not need an external antenna, reduces the cost of realizing external insulation, and improves system reliability. In addition, the wireless voltage divider transmits wireless signals through the pressure equalizing ring, with high signal strength and wide coverage.

Description

A wireless voltage divider with equalizing ring transmitting antenna

technical field

The utility model relates to a voltage divider, in particular to a wireless voltage divider with a pressure equalizing ring transmitting antenna.

Background technique

Traditional voltage dividers use coaxial cables to transmit voltage signals to remote display terminals. On the one hand, this increases the possibility of the analog signal being disturbed during transmission; on the other hand, if the insulation of the voltage divider is damaged, it is easy to cause the voltage on the coaxial cable to rise, which will threaten the personal safety of the reading personnel.

Contents of the invention

The utility model provides a manufactured wireless voltage divider with a voltage equalizing ring transmitting antenna, which does not need an external antenna, reduces the cost of realizing external insulation, and improves system reliability. In addition, the wireless voltage divider transmits wireless signals through the voltage equalizing ring, with high signal strength and wide coverage.

The technical scheme that the utility model takes is:

A wireless voltage divider with a voltage equalizing loop transmitting antenna, comprising a voltage equalizing loop transmitting antenna located at the upper part, an insulating cylinder located at the middle part, and a voltage signal processing part located at the lower part. The leading end of the transmitting antenna of the voltage equalizing loop is connected to the first high frequency wave blocking inductor L1. A high-voltage capacitor C1 and a low-voltage capacitor C2 are arranged inside the insulating cylinder. The voltage signal processing part includes a metal shielding shell, in which a power frequency voltage signal processing circuit and a wireless signal transmitting circuit are arranged. The metal shielding shell is provided with a grounding terminal and an external terminal for voltage output.

The metal shielding shell is provided with a voltage acquisition module, a wireless signal transmission module, a low-pass filter, a high-pass filter, and a transformer T0; the low-voltage capacitor C2 couples the measured voltage to the voltage acquisition module through the transformer T0, and the voltage acquisition module is preceded by a Low-pass filter; the wireless signal transmitting module outputs the radio frequency signal to the transformer T0 through the high-pass filter, and couples it to the high-voltage capacitor C1.

The metal shielding shell also includes an impedance matching circuit, and the impedance matching circuit is used for the capacitance synthesized in series with the high-voltage capacitor C1 and the capacitance of the equalizing ring transmitting antenna to ground to generate resonance.

One end of the low voltage capacitor C2 is connected to the ground terminal through a second high frequency wave blocking inductor L2.

The utility model relates to a wireless voltage divider with a voltage equalizing ring transmitting antenna, which uses radio waves to transmit voltage digital signals, and workers can read the voltage amplitude in real time from a remote mobile client. In addition, in order to avoid the need to increase the external insulation of the voltage divider due to the introduction of an external transmitting antenna, the wireless signal is coupled to the voltage equalizing ring as the antenna through the high voltage capacitor of the voltage divider, so that the insulation structure is compact and the volume is reduced. Moreover, the voltage equalizing loop antenna has a large vertical distance from the ground, so that the wireless signal covers a wide range and increases the safety factor of users.

Description of drawings

Fig. 1 is a schematic structural diagram of the wireless voltage divider of the present invention.

Fig. 2 is a schematic diagram of the transmitting antenna excitation circuit of the wireless voltage divider of the present invention.

detailed description

As shown in Figures 1 and 2, a wireless voltage divider with a voltage equalizing loop transmitting antenna includes a voltage equalizing loop transmitting antenna 1 at the upper part, an insulating cylinder 2 at the middle, and a voltage signal processing part 3 at the lower part.

The leading end of the voltage equalizing loop transmitting antenna 1 is connected to the first high-frequency wave blocking inductance L1 to prevent wireless signals from passing through the voltage measured device.

The insulating cylinder 2 is provided with a high-voltage capacitor C1 and a low-voltage capacitor C2 inside.

The voltage signal processing part 3 includes a metal shielding shell, in which a power frequency voltage signal processing circuit and a wireless signal transmitting circuit are arranged. The metal shielding shell is made of high-conductivity metal material, which plays the role of shielding the electric field, so that the internal power frequency voltage signal processing circuit and wireless signal transmission circuit can avoid external electromagnetic interference. The metal shielding shell is provided with a grounding terminal 4 and an external voltage output terminal 5 for use in voltage divider calibration.

The utility model is a wireless voltage divider with a voltage equalizing ring transmitting antenna, which works in a two-way signal transmission mode, as shown in Fig. 2 . The low-voltage capacitor C2 couples the measured voltage to the voltage acquisition module through the transformer T0. The voltage acquisition module is preceded by a low-pass filter. On the one hand, it can avoid external high-frequency interference signals transmitted through the capacitor. RF signal injection. The wireless signal transmitting module outputs the radio frequency signal to the transformer T0 through the high-pass filter, and couples it to the high-voltage capacitor C1. Reasonably set the impedance matching circuit, so that the capacitor composed of the high-voltage capacitor C1 of the voltage divider and the ground capacitor of the voltage equalizing ring transmitting antenna 1 in series can resonate with it, so that the signal can be transmitted efficiently.

Since the ground terminal 4 of the voltage divider and the high voltage end of the voltage divider are respectively connected in series: the first high frequency wave blocking inductor L1 and the second high frequency wave blocking inductor L2. Therefore, the signal loss is avoided to the greatest extent without affecting the working characteristics of the power frequency. After electric field simulation, it is obtained that the ground capacitance of the transmitting antenna end of the voltage equalizing loop is about 20pF, and a relatively high high-voltage capacitor C1 needs to be designed to reduce the signal loss on it. When the voltage divider is working, the RF signal with a smaller amplitude is superimposed on the power frequency waveform with a larger amplitude, and the signal and power flow bidirectionally on the same loop, which optimizes the structure of the voltage divider.

Claims (4)

1. A wireless voltage divider with a voltage equalizing ring transmitting antenna, including a voltage equalizing ring transmitting antenna (1) located on the upper part, an insulating cylinder (2) located in the middle, and a voltage signal processing part (3) located in the lower part. It is characterized in that: the lead-out end of the equalizing ring transmitting antenna (1) is connected to the first high-frequency wave-blocking inductance L1, the insulating cylinder (2) is provided with a high-voltage capacitor C1 and a low-voltage capacitor C2 inside, and the voltage signal processing part ( 3) It includes a metal shielding shell, which is provided with a power frequency voltage signal processing circuit and a wireless signal transmitting circuit. The metal shielding shell is provided with a ground terminal (4) and a voltage output external terminal (5). 2. A wireless voltage divider with a voltage equalizing ring transmitting antenna according to claim 1, wherein a voltage acquisition module, a wireless signal transmitting module, a low-pass filter, and a high-pass filter are arranged in the metal shielding shell The low-voltage capacitor C2 couples the measured voltage to the voltage acquisition module through the transformer T0, and the voltage acquisition module is preceded by a low-pass filter; the wireless signal transmitting module outputs the radio frequency signal to the transformer T0 through the high-pass filter, and couples to the on high voltage capacitor C1. 3. A wireless voltage divider with a voltage equalizing loop transmitting antenna according to claim 1 or 2, characterized in that: the metal shielding shell also includes an impedance matching circuit, and the impedance matching circuit is used for the high voltage capacitor C1 and the equalizing The capacitance formed by the pressure ring transmitting antenna (1) connected in series with the capacitance to ground resonates. 4. A wireless voltage divider with a voltage equalizing loop transmitting antenna according to claim 1, characterized in that: one end of the low-voltage capacitor C2 is connected to the ground terminal (4) through the second high-frequency wave-blocking inductance L2 .