CN-224216812-U - Partial discharge probe based on Redberg atoms

CN224216812UCN 224216812 UCN224216812 UCN 224216812UCN-224216812-U

Abstract

The utility model provides a local discharge probe based on a Redburg atom, which comprises a protective shell, a resonant cavity assembly, a light ray leading-in assembly and a light ray leading-out assembly, wherein the resonant cavity assembly is arranged in the protective shell, the light ray leading-in assembly is arranged on the outer side of the resonant cavity assembly and is connected with the inner part of the resonant cavity assembly through optical communication, the light ray leading-out assembly is arranged on the other outer side of the resonant cavity assembly and is connected with the inner part of the resonant cavity assembly through optical communication, detection light emitted by the light ray leading-in assembly passes through the inner part of the resonant cavity assembly and then enters the light ray leading-out assembly, and pumping light emitted by the light ray leading-out assembly passes through the inner part of the resonant cavity assembly and repeatedly returns to the inner part of the resonant cavity to form resonant cavity resonance enhancement. According to the utility model, through combining resonant cavity internal resonance enhancement with detection light-off cavity design, the light field absorption efficiency of the partial discharge probe is improved, and the power requirement of a laser light source is reduced.

Inventors

WANG CHAO
CHEN XIAOJUAN
WANG HONGJIA

Assignees

北京科微量子科技有限公司
科微量子科技(湖南)有限公司

Dates

Publication Date: 20260508
Application Date: 20250704

Claims (9)

1. A local discharge probe based on a reed burg atom, comprising: the protective shell is of a cavity structure; the resonant cavity assembly is arranged in the protective shell; The light ray introducing component is arranged on the outer side of the resonant cavity component and is connected with the interior of the resonant cavity component through optical communication; The light beam incoming and outgoing assembly is arranged at the other outer side of the resonant cavity assembly and is in optical communication connection with the interior of the resonant cavity assembly, and detection light emitted by the light beam incoming and outgoing assembly passes through the interior of the resonant cavity assembly and then enters the light beam incoming and outgoing assembly; And the control system is used for sequentially controlling the temperature and the light intensity in the resonant cavity within the target value range and maintaining the cavity length frequency locking.
2. A reed-atom based partial discharge probe as recited in claim 1 wherein the resonant cavity assembly comprises: The cesium atom air chamber is positioned at the middle part of the cavity structure in the protective shell; The first high-reflection high-transmission mirror is arranged between the cesium atom air chamber and the light ray introducing assembly, and detection light emitted by the light ray introducing assembly is incident to the cesium atom air chamber; The second high-reflection high-transmission mirror is arranged between the cesium atom air chamber and the light ray lead-in and lead-out assembly and forms a resonant cavity with the first high-reflection high-transmission mirror, and pump light emitted by the light ray lead-in and lead-out assembly is incident to the cesium atom air chamber after passing through the second high-reflection high-transmission mirror; the dichroic mirror is arranged on the outer side of the second high-reflection high-transmission mirror, the detection light emitted by the cesium atom gas chamber is transmitted into the cesium atom gas chamber through the first high-reflection high-transmission mirror and then transmitted to the dichroic mirror through the second high-reflection high-transmission mirror, and the pumping light reflected by the dichroic mirror is parallelly reflected to the cesium atom gas chamber through the second high-reflection high-transmission mirror.
3. A partial discharge probe based on the Redberg atom as claimed in claim 2, The second high-reflection high-transmission mirror and the first high-reflection high-transmission mirror are symmetrically arranged at two axial sides of the cesium atom air chamber, the pumping light transmitted by the second high-reflection high-transmission mirror is parallel to the detection light and is opposite to the cesium atom air chamber, the pumping light emitted by the cesium atom air chamber passes through the cesium atom air chamber again after being reflected by the first high-reflection high-transmission mirror and then passes through the second high-reflection high-transmission mirror, and the pumping light passes back and forth through the cesium atom air chamber for multiple times and is opposite to the detection light in parallel in the cesium atom air chamber for multiple times, so that resonant cavity resonance enhancement is formed.
4. A reed-atom based partial discharge probe as recited in claim 2 wherein the resonant cavity assembly further comprises: The third high-reflection high-transmission mirror is arranged opposite to the first high-reflection high-transmission mirror, and the pumping light emitted by the cesium atom air chamber is incident to the first high-reflection high-transmission mirror and is reflected to the third high-reflection high-transmission mirror through the first high-reflection high-transmission mirror; The fourth high-reflection high-transmission mirror is arranged opposite to the third high-reflection high-transmission mirror and the second high-reflection high-transmission mirror, and the pumping light emitted by the first high-reflection high-transmission mirror is reflected to the fourth high-reflection high-transmission mirror through the third high-reflection high-transmission mirror and then reflected to the second high-reflection high-transmission mirror through the fourth high-reflection high-transmission mirror.
5. A partial discharge probe based on a Redberg atom as claimed in claim 4, The pumping light emitted from the cesium atom air chamber is reflected into the cesium atom air chamber through the first high-reflection high-transmission mirror, the third high-reflection high-transmission mirror, the fourth high-reflection high-transmission mirror and the second high-reflection high-transmission mirror in sequence, and then repeatedly goes between the four high-reflection high-transmission mirrors and repeatedly and parallelly and oppositely emits with the detection light in the cesium atom air chamber, so that resonant cavity resonance enhancement is formed.
6. A partial discharge probe as claimed in claim 1 or claim 3 wherein the light introducing assembly comprises: The first collimator is arranged outside the first high-reflection high-transmission mirror, and detection light emitted by the first collimator is transmitted to the cesium atom air chamber through the first high-reflection high-transmission mirror.
7. The partial discharge probe as recited in claim 6 wherein the light lead-in and lead-out assembly comprises: And the second collimator is arranged between the dichroic mirror and the second high-reflection high-transmission mirror and is symmetrically arranged with the first collimator.
8. A partial discharge probe as defined in claim 1, 4 or 7 further comprising: The photoelectric detection module is arranged on the outer side of the resonant cavity component, detection light emitted by the light ray leading-out component is incident to the photoelectric detection module, and the photoelectric detection module detects electromagnetic induction transparent spectrum signals in the detection light and converts the electromagnetic induction transparent spectrum signals into electric signals.
9. The partial discharge probe as claimed in claim 1 wherein the control system comprises a temperature control module and a light intensity control module; The temperature control module comprises: The temperature sensor is internally arranged in the resonant cavity and is used for monitoring the temperature in the resonant cavity and the internal temperature of the resonant cavity in real time, generating a voltage signal and outputting the voltage signal to the temperature control unit; The temperature control unit is in communication connection with the temperature sensor and is used for receiving a voltage signal of the temperature sensor, comparing the measured temperature with the target temperature, generating a temperature error signal and driving the temperature control component to work; The temperature control component is in communication connection with the temperature control unit and is used for adjusting the resonant cavity and the internal temperature thereof in real time according to the temperature error signal issued by the controller module; The light intensity control module comprises: The power coupler is arranged in the resonant cavity and is used for converting the pumping light intensity sampled in real time through the resonant cavity into a voltage signal and outputting the voltage signal to the light intensity control unit; the light intensity control unit is in communication connection with the power coupler and is used for receiving the electric signal of the power coupler, calculating a light intensity error signal through a PID algorithm and generating a light intensity driving signal; The PZT piezoelectric ceramic is in communication connection with the light intensity control unit and is used for generating displacement according to a received driving signal, adjusting the distance between the first high-reflection high-transmission mirror and the second high-reflection high-transmission mirror to realize cavity length frequency locking, or adjusting the relative distance between the fourth high-reflection high-transmission mirror and the first high-reflection high-transmission mirror, the second high-reflection high-transmission mirror and the third high-reflection high-transmission mirror.

Description

Partial discharge probe based on Redberg atoms Technical Field The utility model relates to the technical field of discharge detection, in particular to a partial discharge probe based on a Redberg atom. Background The local discharge detection technology based on the Redberg atoms utilizes the characteristic that the Redberg atoms are highly sensitive to electromagnetic fields, realizes discharge positioning and intensity measurement by detecting the electromagnetic field change generated by local discharge, and has the advantages of high sensitivity, non-contact detection and the like. In order to realize enough atomic excitation rate, the existing partial discharge probe generally needs to adopt a high-power laser source with power exceeding 100mW, so that the problems of power accumulation such as dependence on external power input, high spontaneous radiation noise and the like are caused, meanwhile, the single-pass absorption rate of the partial discharge probe to pump light is less than 10%, a large amount of light power is not effectively utilized, and meanwhile, the problems of large system volume, high power consumption, disturbance of a strong laser-induced thermal effect to an atomic ensemble, mode degradation phenomenon of a semiconductor laser when the power is more than 50mW and the like are caused. Therefore, how to improve the partial discharge probe, and improve the light field absorption efficiency of the partial discharge probe while reducing the laser power of the laser, is a technical problem to be solved. Disclosure of Invention The utility model provides a local discharge probe based on a Redberg atom, which improves the light field absorption efficiency of the local discharge probe and reduces the power requirement of a laser light source by combining resonance enhancement in a resonant cavity with detection light-off cavity design. The technical scheme provided by the utility model is as follows: a local discharge probe based on a reed burg atom, comprising: the protective shell is of a cavity structure; The resonant cavity component is arranged in the protective shell; The light ray introducing assembly is arranged on the outer side of the resonant cavity assembly and is connected with the interior of the resonant cavity assembly through optical communication; The light beam incoming and outgoing assembly is arranged at the other outer side of the resonant cavity assembly and is connected with the interior of the resonant cavity assembly through optical communication, detection light emitted by the light beam incoming and outgoing assembly passes through the interior of the resonant cavity assembly and then enters the light beam incoming and outgoing assembly, and pumping light emitted by the light beam incoming and outgoing assembly passes through the interior of the resonant cavity assembly and repeatedly passes back and forth the interior of the resonant cavity to form resonant cavity resonance enhancement. Preferably, the resonant cavity assembly comprises: The cesium atom air chamber is positioned at the middle part of the cavity structure in the protective shell; the first high-reflection high-transmission mirror is arranged between the cesium atom air chamber and the light ray introducing assembly, and detection light emitted by the light ray introducing assembly is incident to the cesium atom air chamber; The second high-reflection high-transmission mirror is arranged between the cesium atom air chamber and the light ray lead-in and lead-out assembly and forms a resonant cavity with the first high-reflection high-transmission mirror, and pumping light emitted by the light ray lead-in and lead-out assembly enters the cesium atom air chamber after passing through the second high-reflection high-transmission mirror; A dichroic mirror disposed outside the second high-reflection high-transmission mirror, the detection light emitted from the cesium atom gas cell being transmitted into the cesium atom gas cell through the first high-reflection high-transmission mirror and then transmitted to the dichroic mirror through the second high-reflection high-transmission mirror; the pump light reflected by the dichroic mirror is parallel-opposite-incident to the cesium atom air chamber through the second high-reflection high-transmission mirror. The utility model only allows the pump light with specific frequency to form stable standing wave in the cavity through the resonant cavity formed by the first high-reflection high-transmission mirror, the second high-reflection high-transmission mirror and the cesium atom air chamber which are arranged in parallel, and the light with other frequencies is restrained due to interference cancellation, thereby achieving the purpose of resonant cavity frequency selection. The second high-reflection high-transmission mirror and the first high-reflection high-transmission mirror are symmetrically arranged at two axial sides of the cesium atom air chambe