阅读说明：本技术 同轴型高压脉冲分压器 (Coaxial high-voltage pulse voltage divider ) 是由 李俊杰 其他发明人请求不公开姓名 于 2019-08-10 设计创作，主要内容包括：本发明公开了一种同轴型高压脉冲分压器,包括引入螺杆、绝缘支柱、同轴屏蔽管、分压电阻和输出同轴接头,其特征在于：引入螺杆安装在绝缘支柱中心,绝缘支柱与同轴屏蔽管的一端相连,输出同轴接头与同轴屏蔽管的另一端相连,分压电阻连接引入螺杆和输出同轴接头,并且安装在同轴屏蔽管内。本发明的同轴型高压脉冲分压器具有结构简单、频率响应带宽宽、耐受电压高、分压比稳定、可以连接同轴屏蔽电缆和抗干扰能力强的优点。(The invention discloses a coaxial high-voltage pulse voltage divider, which comprises an introducing screw rod, an insulating support, a coaxial shielding pipe, a divider resistor and an output coaxial connector, and is characterized in that: the lead-in screw rod is arranged in the center of the insulation support, the insulation support is connected with one end of the coaxial shielding pipe, the output coaxial connector is connected with the other end of the coaxial shielding pipe, and the divider resistor is connected with the lead-in screw rod and the output coaxial connector and arranged in the coaxial shielding pipe. The coaxial high-voltage pulse voltage divider has the advantages of simple structure, wide frequency response bandwidth, high withstand voltage, stable voltage division ratio, capability of being connected with a coaxial shielding cable and strong anti-jamming capability.)

1. The utility model provides a coaxial type high voltage pulse voltage divider, is including introducing screw rod, insulating pillar, coaxial shielding pipe, divider resistance and output coaxial joint, its characterized in that: the lead-in screw rod is arranged in the center of the insulation support, the insulation support is connected with one end of the coaxial shielding pipe, the output coaxial connector is connected with the other end of the coaxial shielding pipe, and the divider resistor is connected with the lead-in screw rod and the output coaxial connector and arranged in the coaxial shielding pipe.

2. The coaxial high voltage pulse divider of claim 1, wherein the divider resistor is formed by serially connecting a plurality of non-inductive resistors.

3. The coaxial high-voltage pulse divider according to claim 1, wherein the divider resistor and the coaxial shielding tube form a coaxial transmission structure, and the transmission characteristic impedance of the coaxial transmission structure is matched with the output coaxial connector and a coaxial cable connected subsequently.

4. The coaxial high voltage pulse divider according to claim 1, wherein the divider resistor is sleeved with an insulating sleeve.

5. The coaxial type high voltage pulse divider according to claim 1, wherein the ends of the divider resistors are connected in parallel or in series to match the trimming resistors.

6. The coaxial high voltage pulse divider according to claim 1, wherein the output coaxial connector is tightly shielded from the coaxial shielding tube.

7. The coaxial high-voltage pulse divider according to claim 1, wherein the coaxial shielding tube is encapsulated with an insulating glue.

Technical Field

The invention relates to a coaxial high-voltage pulse voltage divider, in particular to a coaxial high-voltage pulse voltage divider for electromagnetic pulse high-voltage measurement.

Background

With the development of informatization, various electronic information devices are widely used, and electromagnetic pulses pose a great threat to the electronic information devices. In order to research the effect and the protection effect of various electromagnetic pulses on electronic equipment, pulse voltage needs to be measured in the experimental research process, is often higher and cannot be directly measured, and the pulse voltage is divided by a voltage divider and then can be measured in an oscilloscope. Such a voltage divider needs to withstand high voltages and have a sufficient frequency response bandwidth. At present, two high-voltage pulse voltage dividers are provided, one is a high-voltage probe produced by an oscilloscope manufacturer, and the other is a water resistance voltage divider. The pulse measurement voltage of the high-voltage probe does not exceed 40kV generally, and the high-voltage probe is of an integral structure and is directly connected with a high-resistance input end of an oscilloscope, and the middle of the high-voltage probe cannot be transmitted by a coaxial cable, so that the high-voltage probe cannot penetrate through a shielding cabinet for use. Therefore, the high voltage probe cannot be used in a strong electromagnetic interference environment. The water resistance voltage divider can be very high in withstand voltage, can be connected with a coaxial cable and can also be used in a strong electromagnetic interference environment, but the water resistance voltage divider is unstable, the voltage division ratio can change along with time, the voltage division ratio is calibrated immediately after each use, the use is inconvenient, and the water resistance voltage divider cannot be used without calibrating instruments and equipment.

Disclosure of Invention

Aiming at the defects of the existing high-voltage pulse voltage divider, the invention aims to design a coaxial high-voltage pulse voltage divider with simple structure, stable performance and convenient use.

The purpose of the invention can be realized by the following technical scheme:

the utility model provides a coaxial type high voltage pulse voltage divider, is including introducing screw rod, insulating pillar, coaxial shielding pipe, divider resistance and output coaxial joint, its characterized in that: the lead-in screw rod is arranged in the center of the insulation support, the insulation support is connected with one end of the coaxial shielding pipe, the output coaxial connector is connected with the other end of the coaxial shielding pipe, and the divider resistor is connected with the lead-in screw rod and the output coaxial connector and arranged in the coaxial shielding pipe.

Furthermore, the voltage dividing resistor is formed by connecting a plurality of non-inductive resistors in series.

Furthermore, the divider resistor and the coaxial shielding tube form a coaxial transmission structure, and the transmission characteristic impedance of the coaxial transmission structure is matched with the output coaxial connector and a coaxial cable connected subsequently.

Furthermore, the voltage dividing resistor is sleeved with an insulating sleeve.

Furthermore, the tail ends of the voltage dividing resistors are connected in parallel or in series to match with the adjusting resistors.

Furthermore, the output coaxial connector is tightly connected with the coaxial shielding pipe in a shielding manner.

Furthermore, insulating glue is filled and sealed in the coaxial shielding tube.

The principle of the invention is as follows: the coaxial high-voltage pulse voltage divider adopts a solid noninductive divider resistor, has stable voltage division ratio, is arranged in the shielding tube, and has strong anti-interference capability because the output coaxial connector is tightly connected with the coaxial shielding tube in a shielding way. The divider resistor and the shielding tube form a coaxial transmission line structure, and the characteristic impedance of the coaxial transmission line structure is matched with the characteristic impedance of the output coaxial connector and a coaxial cable connected subsequently, so that the frequency response bandwidth is wide.

Compared with the prior art, the invention has the following remarkable advantages:

1. a plurality of solid non-inductive resistors are connected in series to form a divider resistor, an insulating support is arranged at the high-voltage end, an insulating sleeve is sleeved on the divider resistor, and insulating glue is filled in the insulating support, so that the withstand voltage is high;

2. the coaxial transmission line structure is adopted, the structure is simple, and the frequency response bandwidth is wide;

3. the coaxial shielding structure is adopted, so that the anti-interference capability is strong;

4. by adopting a matching structure and a coaxial output connector, the voltage divider can be connected with a coaxial shielded cable, can pass through a metal wall of a shielding room or a shielding cabinet through a signal transfer bridge and then is connected to an oscilloscope, and can also be connected with other coaxial attenuators in series to increase the attenuation ratio, so that the use is convenient.

Drawings

Fig. 1 is a schematic diagram of a coaxial type high voltage pulse divider of the present invention.

Detailed Description

The invention is described in further detail below with reference to the figures and the detailed description.

Example (b): referring to fig. 1, a coaxial type high voltage pulse voltage divider includes a lead-in screw 1, an insulating support 2, a coaxial shielding tube 3, a voltage dividing resistor 4, and an output coaxial connector 7. The lead-in screw 1 is installed in the center of the insulation support 2 through threads, the insulation support 2 is connected with one end of the coaxial shielding pipe 3 through threads, the output coaxial connector 7 is connected with the other end of the coaxial shielding pipe 3 through threads, and the divider resistor 4 is connected with the lead-in screw 1 and the output coaxial connector 7 and installed in the coaxial shielding pipe 3.

The voltage dividing resistor 4 is formed by connecting a plurality of solid non-inductive resistors in series so as to increase power, voltage dividing ratio and high voltage resistance.

The divider resistor 4 and the coaxial shielding tube 3 form a coaxial transmission structure, and the transmission characteristic impedance of the coaxial transmission structure is matched with the output coaxial connector 7 and a subsequently connected 50 omega coaxial cable.

In order to increase the withstand voltage strength, the voltage dividing resistor 4 is sleeved in the insulating sleeve 5 and is encapsulated with insulating silica gel.

In order to achieve impedance complete matching, if the transmission impedance of the voltage divider coaxial transmission structure is less than 50 Ω, a matching adjusting resistor 6 is connected in parallel at the tail end of the voltage dividing resistor 4; if the transmission impedance of the coaxial transmission structure of the voltage divider is greater than 50 Ω, a matching adjusting resistor 8 is connected in series at the end of the voltage dividing resistor 4, so that the end impedance of the coaxial transmission structure is matched.

The output coaxial connector 7 is an N-shaped coaxial connector, is provided with threads on the periphery and can be tightly connected with the coaxial shielding pipe 3 in a shielding way.

When the divider resistor 4 is formed by connecting 20 5 k omega noninductive resistors in series, the coaxial transmission structure is just impedance matched and is 50 omega, the parallel matching adjusting resistor 6 is not needed, the series matching adjusting resistor 8 is not needed, and the divider is connected to the 50 omega input end of the oscilloscope through a 50 omega coaxial cable, so that the division ratio of the divider is about 2000 times. In order to increase the voltage division ratio, a 50 omega coaxial attenuator can be connected in series in front of the input end of the oscilloscope.