CN-121113076-B - Method and device for determining target object track, electronic equipment and medium

CN121113076BCN 121113076 BCN121113076 BCN 121113076BCN-121113076-B

Abstract

The invention relates to the technical field of target object track determination, and provides a target object track determination method, a target object track determination device, electronic equipment and a computer readable storage medium. The method comprises the steps of obtaining an optical pulse signal from an optical fiber, determining the phase change and the frequency change of the optical pulse generated by the optical fiber due to a target object according to the optical pulse signal, determining the action track of the target object based on the phase change and the frequency change of the optical pulse, and sending an alarm signal to target equipment based on the action track of the target object. The method can effectively solve the defects of the traditional monitoring technology in the application of the nuclear power plant, and the reliability and the efficiency of safety monitoring are remarkably improved.

Inventors

LIU ZHIYUAN
YU HAO
SUN PENGHAO
WANG QINGSONG
XIAO ZHI
LIU FANGNING
WANG ANZHENG
Chai rui

Assignees

北京寰核技术有限公司

Dates

Publication Date: 20260512
Application Date: 20250903

Claims (8)

1. A method for determining a trajectory of a target object, comprising: acquiring an optical pulse signal from an optical fiber; according to the optical pulse signal, determining the optical pulse phase change and the optical pulse frequency change of the optical fiber generated by the target object; Determining a course of action of the target object based on the light pulse phase variation and the light pulse frequency variation; based on the action track of the target object, sending an alarm signal to target equipment; Determining a course of action of the target object based on the light pulse phase variation and the light pulse frequency variation includes: vectorizing the optical pulse phase change and the optical pulse frequency change respectively to obtain a characteristic vector of the optical pulse phase change and a characteristic vector of the optical pulse frequency change; Performing fusion processing on the characteristic vector of the optical pulse phase change and the characteristic vector of the optical pulse frequency change to obtain a target characteristic vector of the optical pulse signal; Determining the similarity between the target feature vector and each historical feature vector; according to the similarity between the target feature vector and each historical feature vector, determining a historical target feature vector matched with the target feature vector from a plurality of historical feature vectors; And determining the action track corresponding to the historical target feature vector as the action track of the target object.
2. The method of claim 1, wherein determining the optical pulse phase change and the optical pulse frequency change of the optical fiber due to the target object based on the optical pulse signal comprises: analyzing the optical pulse signal to obtain acoustic disturbance data, temperature change data and strain data of the optical fiber generated by the target object; calculating the phase change of the optical pulse according to the acoustic disturbance data by a phase change formula, wherein the phase change formula is as follows: Wherein, the Indicating the phase change of the optical pulse of the target object at the optical fiber position z at time t, L indicating the total length of the optical fiber, Representing acoustic disturbance data at fiber location The coefficient of the resulting optical phase change, Acoustic disturbance data of a target object at an optical fiber position z at a time t are represented; Calculating the frequency change of the light pulse according to the temperature change data and the strain data by a frequency change formula, wherein the frequency change formula is as follows: Wherein, the Indicating the change in the frequency of the light pulses, Indicating the frequency of scattered light when undisturbed, And Representing the temperature change data and the strain change data respectively, And Representing the partial derivatives of speed with respect to temperature and strain, respectively.
3. The method of claim 1, wherein the action trajectory comprises any one of a normal walking trajectory, a fast walking trajectory, a running trajectory, and an abnormal action trajectory.
4. The method of claim 3, wherein transmitting an alert signal to a target device based on the trajectory of the target object comprises: when the action track of the target object is the abnormal action track, generating an alarm signal based on the abnormal action track; and sending the alarm signal to the target equipment according to the identification of the target equipment.
5. A method according to claim 3, characterized in that the method further comprises: when the action track of the target object is the abnormal action track, acquiring video data matched with the time information from the multimedia data according to the time information of the light pulse signal; And sending the video data to the target equipment so that the target equipment displays the video data.
6. A target object trajectory determination device, comprising: The acquisition module is used for acquiring the optical pulse signals from the optical fibers; The first determining module is used for determining the optical pulse phase change and the optical pulse frequency change of the optical fiber generated by the target object according to the optical pulse signal; A second determining module that determines a trajectory of the target object based on the optical pulse phase change and the optical pulse frequency change; The sending module is used for sending an alarm signal to target equipment based on the action track of the target object; The first determining module is further configured to vectorize the optical pulse phase change and the optical pulse frequency change to obtain a feature vector of the optical pulse phase change and a feature vector of the optical pulse frequency change; Performing fusion processing on the characteristic vector of the optical pulse phase change and the characteristic vector of the optical pulse frequency change to obtain a target characteristic vector of the optical pulse signal; Determining the similarity between the target feature vector and each historical feature vector; according to the similarity between the target feature vector and each historical feature vector, determining a historical target feature vector matched with the target feature vector from a plurality of historical feature vectors; And determining the action track corresponding to the historical target feature vector as the action track of the target object.
7. An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the method according to any one of claims 1 to 5 when the computer program is executed.
8. A computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the method according to any one of claims 1 to 5.

Description

Method and device for determining target object track, electronic equipment and medium Technical Field The present invention relates to the field of determination technologies of target object trajectories, and in particular, to a method, an apparatus, an electronic device, and a medium for determining a target object trajectory. Background In key infrastructure such as nuclear power plants, it is important to ensure the safety and operating efficiency of the facility. With the widespread use of nuclear energy, security monitoring systems in nuclear power plants are facing increasingly stringent challenges. The security monitoring system inside a nuclear power plant must be able to effectively monitor various potential threats, including unauthorized personnel intrusion and abnormal movement behavior of internal personnel. However, conventional monitoring methods, such as video monitoring systems, while widely used in public and private security fields, face many limitations in the particular environment of a nuclear power plant. First, the environmental disturbances of the nuclear power plant are significant, including high radiation levels, extreme temperatures and humidity, etc., which may negatively impact the performance and stability of the monitoring equipment. The traditional video monitoring system is easy to fail in a high-radiation environment, so that the loss or distortion of monitoring data is caused, and the effectiveness of safety monitoring is affected. Secondly, the existence of the monitoring blind area makes it difficult for the video monitoring system to realize full coverage. The interior of a nuclear power plant often has complex structures and small spaces, which may not be effectively monitored by conventional cameras, resulting in potential safety hazards. Especially in underground or airtight space, the light condition is often poor, further limiting the effect of video monitoring. In addition, the high maintenance cost of conventional video surveillance systems is also an important issue. The operation of the nuclear power plant requires a highly reliable monitoring system, and the maintenance and update of the video monitoring equipment requires a lot of manpower and financial resources, which place a burden on the operation efficiency of the nuclear power plant. Disclosure of Invention In view of the above, a first aspect of an embodiment of the present invention provides a method for determining a track of a target object, including acquiring an optical pulse signal from an optical fiber, determining a phase change of an optical pulse and a frequency change of the optical pulse generated by the optical fiber due to the target object according to the optical pulse signal, determining a movement track of the target object based on the phase change of the optical pulse and the frequency change of the optical pulse, and transmitting an alarm signal to a target device based on the movement track of the target object. In some embodiments, determining the optical pulse phase change and the optical pulse frequency change of the optical fiber due to the target object according to the optical pulse signal comprises analyzing the optical pulse signal to obtain acoustic disturbance data, temperature change data and strain data caused by the target object passing through the optical fiber, calculating the optical pulse phase change according to the acoustic disturbance data through a phase change formula, and calculating the optical pulse frequency change according to the temperature change data and the strain data through a frequency change formula. In some embodiments, determining the action track of the target object based on the optical pulse phase change and the optical pulse frequency change includes vectorizing the optical pulse phase change and the optical pulse frequency change to obtain a feature vector of the optical pulse phase change and a feature vector of the optical pulse frequency change, respectively, fusing the feature vector of the optical pulse phase change and the feature vector of the optical pulse frequency change to obtain a target feature vector of the optical pulse signal, and matching the action track of the target object based on the target feature vector. In some embodiments, matching the action trajectories of the target objects based on the target feature vectors includes determining the similarity of the target feature vectors to each of the historical feature vectors, determining historical target feature vectors matching the target feature vectors from a plurality of historical feature vectors according to the similarity of the target feature vectors to each of the historical feature vectors, and determining the action trajectories corresponding to the historical target feature vectors as the action trajectories of the target objects. In some embodiments, the action trajectory includes any one of a normal walking trajectory, a very fast walking trajectory