High-altitude operation multi-angle high-voltage electric shock alarm device and signal transmitting and receiving method thereof

Abstract

The invention discloses a high-altitude operation multi-angle high-voltage electric shock alarm device and a signal transmitting and receiving method thereof.The device comprises light wave emitters, a light wave monitoring alarm, a metal concave cover, an electric field alarm and a high-altitude rocker arm vehicle, and the light wave emitters are arranged on the periphery of the high-altitude rocker arm vehicle; the light wave monitoring alarm is arranged on the outer edge of a rocker arm of the high-altitude rocker arm vehicle, the metal concave cover is connected with the center position of the rocker arm of the high-altitude rocker arm vehicle, and the electric field alarm is arranged in the metal concave cover. The signal receiving and transmitting method comprises the following steps: modulating and transmitting light waves, and receiving and decoding the light waves. According to the high-altitude operation multi-angle high-voltage electric shock alarm device and the signal transmitting and receiving method thereof, multi-angle and high-precision electric shock monitoring and alarming during high-altitude operation are realized, the operation safety is improved, the anti-interference capability is enhanced, and the detection precision and the response speed are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of electrical safety monitoring, and in particular relates to a high-altitude operation multi-angle high-voltage electric shock alarm device and a signal sending and receiving method thereof. Background Art

[0002] Existing voltage alarms mainly detect the surrounding high-voltage electric field through sensors installed on helmets or other portable devices, and issue warnings when a high-voltage environment is detected to ensure the safety of workers. However, this method has some obvious limitations and shortcomings in high-altitude operations, especially in high-voltage environments such as substations:

[0003] 1. Frequent false alarms caused by high voltage environment:

[0004] In substations or other high-voltage equipment-intensive environments, there are high-voltage lines and equipment everywhere, which will cause the electric field strength in the environment to be extremely high.

[0005] The voltage alarm works by sensing changes in the surrounding electric field. When the surrounding electric field strength is too high, the alarm will be triggered frequently, and even at a safe distance, it will not be able to effectively distinguish between normal working conditions and dangerous conditions.

[0006] Frequent false alarms not only interfere with the judgment of operators, but also affect the normal work process, reduce work efficiency, and may cause safety hazards.

[0007] 2. Limitations of traditional monitoring methods in high-altitude operations:

[0008] Visual observation: Operators rely on visual observation to judge the distance to high-voltage lines at high altitudes, which is often limited by the field of vision, distance and the complexity of the high-altitude environment. Especially in bad weather or when the line of sight is blocked, visual observation is not reliable.

[0009] Video AI diagnosis: Using video surveillance combined with artificial intelligence to monitor high-altitude work areas can automatically identify dangerous situations to a certain extent. However, under complex lighting conditions such as strong light, changing shadows, and reflections, the video image will be distorted or blurred, causing AI misjudgment and false alarms or missed reports.

[0010] Laser distance measurement: Laser distance meters have high accuracy in distance measurement, but in high-altitude environments, laser distance measurement is easily interfered by strong light, reflective objects, etc. In addition, the path obstruction of the laser during the measurement process and suspended matter in the air will also affect the accuracy of the distance measurement.

[0011] 3. Difficulties in measuring the range of high-altitude operations:

[0012] The working area of ​​workers performing aerial work is often difficult to measure and define accurately, especially when the work site environment is complex and the spatial range varies greatly.

[0013] Due to the lack of effective means of measuring the working range, workers are prone to inadvertently approaching high-voltage areas, increasing the risk of electric shock.

[0014] Traditional ground measurement methods are difficult to effectively cover the specific range of high-altitude operations, and therefore cannot guide high-altitude workers to work within a safe range in real time and accurately.

[0015] In summary, the existing high-voltage early warning equipment has obvious deficiencies in complex high-voltage environments such as high altitudes and substations, which makes it difficult to ensure the safety of high-altitude operations. In this environment, it is an urgent need to design a new high-altitude operation safety alarm system that can achieve multi-angle and accurate electric field strength monitoring, reduce false alarms caused by the surrounding high-voltage environment, and clearly define the scope of high-altitude operations. The new system needs to have strong anti-interference capabilities, be able to work stably under complex lighting conditions (such as strong light and reflection), and be able to monitor and alarm the operating range in real time, thereby providing more reliable safety protection for high-altitude workers. Summary of the invention

[0016] The technical problem to be solved by the present invention is to provide a high-altitude operation multi-angle high-voltage electric shock alarm device and its signal sending and receiving method, which can realize multi-angle, high-precision electric shock monitoring and alarm during high-altitude operations, improve operation safety, enhance anti-interference ability, and improve detection accuracy and response speed.

[0017] The technical solution of the present invention is: a multi-angle high-voltage electric shock alarm device for aerial work, comprising: a light wave transmitter, a light wave monitoring alarm, a metal concave cover, an electric field alarm and an aerial jib truck, a number of the light wave transmitters are arranged in a circular frame on the ground outside the aerial jib truck, the light wave monitoring alarm is set on the outer edge of the jib of the aerial jib truck, the metal concave cover is connected to the center position of the jib of the aerial jib truck, and the electric field alarm is set in the metal concave cover and located at the center position of the metal concave cover.

[0018] Furthermore, the light wave transmitter is an infrared light wave transmitter or a laser transmitter, and the light wave monitoring alarm is an infrared light wave monitoring alarm or a laser monitoring alarm.

[0019] Furthermore, the light wave transmitter is a combination of an infrared light wave transmitter and a laser transmitter, and the light wave monitoring alarm is a combination of an infrared light wave monitoring alarm and a laser monitoring alarm.

[0020] Furthermore, the detection radius of the light wave monitoring alarm is not less than twice the horizontal distance between the light wave transmitter and the aerial jib truck.

[0021] Furthermore, the receiving angle of the light wave monitoring alarm is greater than the transmitting swing angle of the light wave transmitter on the ground.

[0022] Furthermore, the number of the light wave transmitters is 16, the transmitting distance is 20 meters, the swing angle of the transmitting direction is less than 5 degrees, and the horizontal distance between the light wave transmitter and the high-altitude jib truck is 8 meters.

[0023] A method for transmitting and receiving optical signals with anti-interference of a high-voltage electric shock alarm device for high-altitude operations at multiple angles, comprising the following steps:

[0024] Step 1: Modulation and emission of light waves, including the following steps:

[0025] S1. Dual wave modulation: Infrared light waves and laser waves are emitted in different modulation modes, and different frequencies or phase modulations are selected; dual wave modulation selects different frequencies or adopts phase shifting mode;

[0026] S2. Periodic sequence coding: The periodic sequence of the emitted light wave adopts binary coding. In one cycle, the infrared light and the laser are turned on and off alternately;

[0027] Step 2, receiving and decoding the light wave, includes the following steps:

[0028] S3, signal reception and regulation: the light wave receiver of the light wave monitoring alarm (2) simultaneously receives the modulation signals from the infrared light and the laser, and uses a matching filter to extract the infrared and laser signal components respectively;

[0029] S4, coding sequence matching: for the extracted infrared and laser signals, their amplitude changes are detected respectively, and the on or off state of the signal in each bit period is determined: if the detected signal strength exceeds the set threshold, the bit is considered to be 1, otherwise it is 0; the detected sequence is matched with the preset coding sequence; when the matching degree exceeds a certain threshold, the received signal is correct, if the matching degree is insufficient, the signal is interfered or damaged, thereby triggering an alarm.

[0030] Furthermore, the expressions of frequency and phase modulation in step S1 are:

[0031] s IR (t) = A IR ·sin(2πf IR t+θ IR ),

[0032] s Laser (t) = A Laser·sin(2πf Laser t+θ Laser ),

[0033] Among them, s IR (t) represents the infrared light wave modulation signal, A IR represents the amplitude of infrared light, f IR represents the emission frequency of infrared light, θ IR Represents the phase angle of infrared light, s Laser (t) represents the laser modulation signal, A Laser represents the amplitude of the laser, f Laser represents the emission frequency of the laser, θ Laser represents the phase angle of the laser;

[0034] The expression of the periodic sequence encoding in step S2 is:

[0035]

[0036] Among them, C(t) represents the coding sequence, b n represents the coded bit value, i.e. 0 or 1, rect(t / T) represents the rectangular pulse function, T represents the duration of each bit, if the signal transmission frequency is 100 times per second, then the bit period is T = 0.01s, N represents the total number of bits in the coded sequence, and n represents the iteration variable, i.e. the position of each bit;

[0037] The final modulated signal is the product of the infrared and laser waves and the coding sequence, that is:

[0038] S(t)=C(t)·[s IR (t)+s Laser (t)],

[0039] Among them, S(t) represents the final modulation signal, C(t) represents the coding sequence, and s IR (t) represents the infrared light wave modulation signal, s Laser (t) represents the laser modulation signal.

[0040] Furthermore, the expression for the light wave receiver of the light wave monitoring alarm (2) in step S3 to simultaneously receive the modulated signals from the infrared light and the laser is:

[0041] R(t)=C(t)·[A IR ·sin(2πf IR t+θ IR )+A Laser ·sin(2πf Laser t+θ Laser )]+n(t),

[0042] Where R(t) represents the received signal, C(t) represents the coded sequence, and A IR represents the amplitude of infrared light, f IR represents the emission frequency of infrared light, θ IR Represents the phase angle of infrared light, s Laser (t) represents the laser modulation signal, A Laser represents the amplitude of the laser, f Laser represents the emission frequency of the laser, θ Laser represents the phase angle of the laser, and n(t) represents external noise interference;

[0043] The expressions for extracting the infrared and laser signal components respectively by the matched filter are:

[0044] R IR (t) = ∫R(t)·sin(2πf IR tt+θ IR )dt

[0045] R Laser (t) = ∫R(t)·sin(2πf Laser t+θ Laser )dt,

[0046] Among them, R IR (t) represents the demodulated signal of infrared light at the receiving end, R Laser (t) represents the demodulated signal of the laser at the receiving end, R(t) represents the received signal, and f IR represents the emission frequency of infrared light, θ IR represents the phase angle of infrared light, f Laser represents the emission frequency of the laser, θ Laser represents the phase angle of the laser;

[0047] The expression for matching the detected sequence with the preset coding sequence in step S4 is:

[0048]

[0049] Among them, D n Indicates the bit value decoded by the receiving end, b n represents the bit value preset by the transmitter, Threshold represents the permissible error threshold, N represents the total length of the coding sequence, and n represents the iteration variable, i.e., the position of each bit;

[0050] The external noise interference n(t) is Gaussian white noise or colored noise, and the expression of Gaussian white noise is:

[0051] n(t)=A n η(t),

[0052] Where n(t) represents the signal interfered by external noise, A n represents the amplitude of the noise, η(t) represents the normalized part of the noise signal and follows a normal distribution σ 2 represents the variance of the noise;

[0053] The expression of the colored noise is:

[0054] n(t)=A n η(t)*h(t),

[0055]

[0056] Where n(t) represents the signal interfered by external noise, A n represents the amplitude of the noise, η(t) represents the normalized part of the noise signal and follows a normal distribution σ 2 represents the variance of the noise, h(t) represents the impulse response of the noise filter, Γ(α) represents the gamma function, α represents the parameter controlling the spectral characteristics of the noise, and u(t) represents the unit step function.

[0057] Beneficial effects of the present invention:

[0058] 1. Multi-angle high-voltage electric shock monitoring to improve operation safety: The present invention can perform multi-angle light wave monitoring of the operation area through the light wave transmitter arranged on the periphery of the high-altitude jib truck and the light wave monitoring alarm set on the outer edge of the jib, so as to realize all-round monitoring of the electric field strength and electric shock risk within the high-altitude operation range, and ensure that potential high-voltage dangers can be detected in time at different angles;

[0059] 2. The light wave signal has strong anti-interference ability and reduces false alarms: The present invention adopts the dual wave modulation technology of infrared light wave and laser, and modulates the light signal by means of different frequencies or phase shifts. At the same time, it combines the encoding and decoding technology to effectively improve the anti-interference ability of the light wave signal in complex environments and reduce false alarms caused by ambient light or other electromagnetic interference;

[0060] 3. The electric field alarm is combined with the metal concave cover to improve the detection accuracy: the present invention sets the electric field alarm inside the metal concave cover and connects it to the center position of the rocker arm of the high-altitude rocker arm vehicle. The metal concave cover is used to focus and shield the electric field signal, reduce the interference of the environmental electric field, and improve the detection accuracy of the electric field alarm for the change of the high-voltage electric field;

[0061] 4. Real-time monitoring of the operating range to prevent accidental entry into high-voltage areas: The present invention can monitor the activity range of high-altitude workers in real time through the combination of a light wave transmitter and a light wave monitoring alarm, prevent workers from accidentally entering high-voltage dangerous areas, and provide more accurate definition of the operating area;

[0062] 5. Adopting periodic sequence coding to improve signal reliability: The present invention further improves the reliability of signal transmission by adding periodic sequence coding (such as "101011" coding) in the process of transmitting light waves, avoiding the influence of interference such as ambient light and strong light on signal reception;

[0063] In summary, the present invention realizes accurate monitoring and early warning of high-voltage electric shock risks in high-altitude working environments through multi-angle light wave monitoring, electric field focusing and shielding, signal modulation and decoding, and flexible system configuration, solving the problem of false alarms of traditional high-voltage alarms in high-voltage environments. At the same time, its strong anti-interference ability and real-time monitoring function provide higher safety for high-altitude workers, stronger adaptability, and better response to the complex needs of high-voltage environments such as substations. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 The invention is a structural schematic diagram of a high-altitude operation multi-angle high-voltage electric shock alarm device.

[0065] Figure 2 The invention is a structural schematic diagram of a metal concave cover of a high-altitude operation multi-angle high-voltage electric shock alarm device.

[0066] In the figure: 1-light wave transmitter, 2-light wave monitoring alarm, 3-metal concave cover, 4-electric field alarm. DETAILED DESCRIPTION

[0067] Example 1: Figure 1-2 As shown, a high-altitude operation multi-angle high-voltage electric shock alarm device includes: a light wave transmitter 1, a light wave monitoring alarm 2, a metal concave cover 3, an electric field alarm 4 and an aerial jib truck, a plurality of the light wave transmitters 1 are arranged in a circular frame on the outer ground of the aerial jib truck, the light wave monitoring alarm 2 is arranged on the outer edge of the jib of the aerial jib truck, the metal concave cover 3 is connected to the center position of the jib of the aerial jib truck, the electric field alarm 4 is arranged in the metal concave cover 3 and is located at the center position of the metal concave cover 3, the light wave transmitter 1 is a kind of infrared light wave transmitter or laser transmitter, and the light wave monitoring alarm 2 is a kind of infrared light wave monitoring alarm or laser monitoring alarm.

[0068] Preferably, the detection radius of the light wave monitoring alarm 2 is not less than twice the horizontal distance between the light wave transmitter 1 and the aerial jib truck.

[0069] Preferably, the receiving angle of the light wave monitoring alarm 2 is greater than the transmitting swing angle of the light wave transmitter 1 on the ground.

[0070] Preferably, the number of the light wave transmitters 1 is 16, the transmitting distance is 20 meters, the swing angle in the transmitting direction is less than 5 degrees, and the horizontal distance between the light wave transmitter 1 and the aerial jib truck is 8 meters.

[0071] Example 2: Figure 1-2 As shown, a multi-angle high-voltage electric shock alarm device for aerial work includes: a light wave transmitter 1, a light wave monitoring alarm 2, a metal concave cover 3, an electric field alarm 4 and an aerial jib truck, a plurality of the light wave transmitters 1 are arranged in a circular frame on the ground outside the aerial jib truck, the light wave monitoring alarm 2 is arranged on the outer edge of the jib of the aerial jib truck, the metal concave cover 3 is connected to the center position of the jib of the aerial jib truck, the electric field alarm 4 is arranged in the metal concave cover 3 and is located at the center position of the metal concave cover 3, the light wave transmitter 1 is a combination of an infrared light wave transmitter and a laser transmitter, and the light wave monitoring alarm 2 is a combination of an infrared light wave monitoring alarm and a laser monitoring alarm.

[0072] Preferably, the detection radius of the light wave monitoring alarm 2 is not less than twice the horizontal distance between the light wave transmitter 1 and the aerial jib truck.

[0073] Preferably, the receiving angle of the light wave monitoring alarm 2 is greater than the transmitting swing angle of the light wave transmitter 1 on the ground.

[0074] Preferably, the number of the light wave transmitters 1 is 16, the transmitting distance is 20 meters, the swing angle in the transmitting direction is less than 5 degrees, and the horizontal distance between the light wave transmitter 1 and the aerial jib truck is 8 meters.

[0075] A method for transmitting and receiving optical signals with anti-interference of a high-voltage electric shock alarm device for high-altitude operations at multiple angles, comprising the following steps:

[0076] Step 1: Modulation and emission of light waves, including the following steps:

[0077] S1. Dual wave modulation: Infrared light waves and laser waves are emitted in different modulation modes, and different frequencies or phase modulations are selected; dual wave modulation selects different frequencies or adopts phase shifting mode;

[0078] S2. Periodic sequence coding: The periodic sequence of the emitted light wave adopts binary coding. In one cycle, the infrared light and the laser are turned on and off alternately;

[0079] Step 2, receiving and decoding the light wave, includes the following steps:

[0080] S3, signal reception and regulation: the light wave receiver of the light wave monitoring alarm (2) simultaneously receives the modulation signals from the infrared light and the laser, and uses a matching filter to extract the infrared and laser signal components respectively;

[0081] S4, coding sequence matching: for the extracted infrared and laser signals, their amplitude changes are detected respectively, and the on or off state of the signal in each bit period is determined: if the detected signal strength exceeds the set threshold, the bit is considered to be 1, otherwise it is 0; the detected sequence is matched with the preset coding sequence; when the matching degree exceeds a certain threshold, the received signal is correct, if the matching degree is insufficient, the signal is interfered or damaged, thereby triggering an alarm.

[0082] Preferably, the expressions of frequency and phase modulation in step S1 are:

[0083] s IR (t) = A IR ·sin(2πf IR t+θ IR ),

[0084] s Laser (t) = A Laser ·sin(2πf Laser t+θ Laser ),

[0085] Among them, s IR (t) represents the infrared light wave modulation signal, A IR represents the amplitude of infrared light, f IR represents the emission frequency of infrared light, θ IR Represents the phase angle of infrared light, s Laser (t) represents the laser modulation signal, A Laser represents the amplitude of the laser, f Laser represents the emission frequency of the laser, θ Laser represents the phase angle of the laser;

[0086] The expression of the periodic sequence encoding in step S2 is:

[0087]

[0088] Among them, C(t) represents the coding sequence, b n represents the coded bit value, i.e. 0 or 1, rect(t / T) represents the rectangular pulse function, T represents the duration of each bit, if the signal transmission frequency is 100 times per second, then the bit period is T = 0.01s, N represents the total number of bits in the coded sequence, and n represents the iteration variable, i.e. the position of each bit;

[0089] The final modulated signal is the product of the infrared and laser waves and the coding sequence, that is:

[0090] S(t)=C(t)·[s IR (t)+s Laser (t)],

[0091] Among them, S(t) represents the final modulation signal, C(t) represents the coding sequence, and s IR (t) represents the infrared light wave modulation signal, s Laser (t) represents the laser modulation signal.

[0092] Preferably, the expression for the light wave receiver of the light wave monitoring alarm (2) in step S3 to simultaneously receive the modulated signals from the infrared light and the laser is:

[0093] R(t)=C(t)·[A IR ·sin(2πf IR t+θ IR )+A Laser ·sin(2πf Laser t+θ Laser )]+n(t),

[0094] Where R(t) represents the received signal, C(t) represents the coded sequence, and A IR represents the amplitude of infrared light, f IR represents the emission frequency of infrared light, θ IR Represents the phase angle of infrared light, s Laser (t) represents the laser modulation signal, A Laser represents the amplitude of the laser, f Laser represents the emission frequency of the laser, θ Laser represents the phase angle of the laser, and n(t) represents external noise interference;

[0095] The expressions for extracting the infrared and laser signal components respectively by the matched filter are:

[0096] R IR (t) = ∫R(t)·sin(2πf IR t+θ IR )dt

[0097] R Laser (t) = ∫R(t)·sin(2πf Laser t+θ Laser )dt,

[0098] Among them, R IR (t) represents the demodulated signal of infrared light at the receiving end, R Laser(t) represents the demodulated signal of the laser at the receiving end, R(t) represents the received signal, and f IR represents the emission frequency of infrared light, θ IR represents the phase angle of infrared light, f Laser represents the emission frequency of the laser, θ Laser represents the phase angle of the laser;

[0099] The expression for matching the detected sequence with the preset coding sequence in step S4 is:

[0100]

[0101] Among them, D n Indicates the bit value decoded by the receiving end, b n represents the bit value preset by the transmitter, Threshold represents the permissible error threshold, N represents the total length of the coding sequence, and n represents the iteration variable, i.e., the position of each bit;

[0102] The external noise interference n(t) is Gaussian white noise or colored noise, and the expression of Gaussian white noise is:

[0103] n(t)=A n η(t),

[0104] Among them, n(t) represents the signal interfered by external noise, An represents the amplitude of the noise, and η(t) represents the normalized part of the noise signal and obeys the normal distribution. σ 2 represents the variance of the noise;

[0105] The expression of the colored noise is:

[0106] n(t)=A n η(t)*h(t),

[0107]

[0108] Where n(t) represents the signal interfered by external noise, A n represents the amplitude of the noise, η(t) represents the normalized part of the noise signal and follows a normal distribution σ 2 represents the variance of the noise, h(t) represents the impulse response of the noise filter, Γ(α) represents the gamma function, α represents the parameter controlling the spectral characteristics of the noise, and u(t) represents the unit step function.

[0109] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-altitude operation multi-angle high-voltage electric shock alarm device, characterized in that: include: A light wave transmitter (1), a light wave monitoring alarm (2), a metal concave cover (3), an electric field alarm (4) and a high-altitude jib truck, wherein a plurality of the light wave transmitters (1) are arranged in a circular frame on the ground outside the high-altitude jib truck, the light wave monitoring alarm (2) is arranged on the outer edge of the jib of the high-altitude jib truck, the metal concave cover (3) is connected to the center position of the jib of the high-altitude jib truck, and the electric field alarm (4) is arranged in the metal concave cover (3) and is located at the center position of the metal concave cover (3).

2. A high-altitude operation multi-angle high-voltage electric shock alarm device according to claim 1, characterized in that: The light wave transmitter (1) is a type of infrared light wave transmitter or a laser transmitter, and the light wave monitoring alarm (2) is a type of infrared light wave monitoring alarm or a laser monitoring alarm.

3. The high-altitude operation multi-angle high-voltage electric shock alarm device according to claim 1 is characterized in that: The light wave transmitter (1) is a combination of an infrared light wave transmitter and a laser transmitter, and the light wave monitoring alarm (2) is a combination of an infrared light wave monitoring alarm and a laser monitoring alarm.

4. The high-altitude operation multi-angle high-voltage electric shock alarm device according to claim 1 is characterized in that: The detection radius of the light wave monitoring alarm (2) is not less than twice the horizontal distance between the light wave transmitter (1) and the high-altitude jib vehicle.

5. The high-altitude operation multi-angle high-voltage electric shock alarm device according to claim 1 is characterized in that: The receiving angle of the light wave monitoring alarm (2) is greater than the transmitting swing angle of the light wave transmitter (1) on the ground.

6. The high-altitude operation multi-angle high-voltage electric shock alarm device according to claim 1 is characterized in that: The number of the light wave transmitters (1) is 16, the transmission distance is 20 meters, the swing angle in the transmission direction is less than 5 degrees, and the horizontal distance between the light wave transmitter (1) and the high-altitude jib vehicle is 8 meters.

7. A method for transmitting and receiving optical signals with anti-interference of a high-altitude operation multi-angle high-voltage electric shock alarm device according to claim 1, characterized in that: The following steps are involved: Step 1: Modulation and emission of light waves, including the following steps: S1. Dual wave modulation: Infrared light waves and laser waves are emitted in different modulation modes, and different frequencies or phase modulations are selected; dual wave modulation selects different frequencies or adopts phase shifting mode; S2. Periodic sequence coding: The periodic sequence of the emitted light wave adopts binary coding. In one cycle, the infrared light and the laser are turned on and off alternately; Step 2, receiving and decoding the light wave, includes the following steps: S3, signal reception and regulation: the light wave receiver of the light wave monitoring alarm (2) simultaneously receives the modulation signals from the infrared light and the laser, and uses a matching filter to extract the infrared and laser signal components respectively; S4, coding sequence matching: for the extracted infrared and laser signals, their amplitude changes are detected respectively, and the on or off state of the signal in each bit period is determined: if the detected signal strength exceeds the set threshold, the bit is considered to be 1, otherwise it is 0; the detected sequence is matched with the preset coding sequence; when the matching degree exceeds a certain threshold, the received signal is correct, if the matching degree is insufficient, the signal is interfered or damaged, thereby triggering an alarm.

8. The method for transmitting and receiving optical signals with anti-interference of a high-voltage electric shock alarm device for multi-angle aerial work according to claim 7, characterized in that: The expressions of frequency and phase modulation in step S1 are: s IR (t)=A IR ·sin(2πf IR t+θ IR ), s Laser (t)=A Laser ·sin(2πf Laser t+θ Laser ), Among them, s IR (t) represents the infrared light wave modulation signal, A IR represents the amplitude of infrared light, f IR represents the emission frequency of infrared light, θ IR Represents the phase angle of infrared light, s Laser (t) represents the laser modulation signal, A Laser represents the amplitude of the laser, f Laser represents the emission frequency of the laser, θ Laser represents the phase angle of the laser; The expression of the periodic sequence encoding in step S2 is: Among them, C(t) represents the coding sequence, b n represents the coded bit value, i.e. 0 or 1, rect(t / T) represents the rectangular pulse function, T represents the duration of each bit, if the signal transmission frequency is 100 times per second, then the bit period is T = 0.01s, N represents the total number of bits in the coded sequence, and n represents the iteration variable, i.e. the position of each bit; The final modulated signal is the product of the infrared and laser waves and the coding sequence, that is: S(t)=C(t)·[s IR (t)+s Laser (t)], Among them, S(t) represents the final modulation signal, C(t) represents the coding sequence, and s IR (t) represents the infrared light wave modulation signal, s Laser (t) represents the laser modulation signal.

9. The optical signal anti-interference receiving and sending method of the multi-angle high-voltage electric shock alarm device for aerial work according to claim 7 is characterized in that: The expression for the light wave receiver of the light wave monitoring alarm (2) in step S3 to simultaneously receive the modulated signals from the infrared light and the laser is: R(t)=C(t)·[A IR ·sin(2πf IR t+θIR)+A Laser ·sin(2πf Lasert +θ Laser )]+n(t), Where R(t) represents the received signal, C(t) represents the coded sequence, and A IR represents the amplitude of infrared light, f IR represents the emission frequency of infrared light, θ IR Represents the phase angle of infrared light, s Laser (t) represents the laser modulation signal, A Laser represents the amplitude of the laser, f Laser represents the emission frequency of the laser, θ Laser represents the phase angle of the laser, and n(t) represents external noise interference; The expressions for extracting the infrared and laser signal components respectively by the matched filter are: R IR (t)=∫R(t)·sin(2πf IR t+θ IR )dt R Laser (t)=∫R(t)·sin(2πf Laser t+θ Laser )dt, Among them, R IR (t) represents the demodulated signal of infrared light at the receiving end, R Laser (t) represents the demodulated signal of the laser at the receiving end, R(t) represents the received signal, and f IR represents the emission frequency of infrared light, θ IR represents the phase angle of infrared light, f Laser represents the emission frequency of the laser, θ Laser represents the phase angle of the laser; The expression for matching the detected sequence with the preset coding sequence in step S4 is: Among them, D n Indicates the bit value decoded by the receiving end, b n represents the bit value preset by the transmitter, Threshold represents the permissible error threshold, N represents the total length of the coding sequence, and n represents the iteration variable, i.e., the position of each bit; The external noise interference n(t) is Gaussian white noise or colored noise, and the expression of Gaussian white noise is: n(t)=A n ·η(t), Where n(t) represents the signal interfered by external noise, A n represents the amplitude of the noise, η(t) represents the normalized part of the noise signal and follows a normal distribution σ 2 represents the variance of the noise; The expression of the colored noise is: n(t)=A n ·η(t)*h(t), Among them, n(t) represents the signal interfered by external noise, An represents the amplitude of the noise, and η(t) represents the normalized part of the noise signal and obeys the normal distribution. σ 2 represents the variance of the noise, h(t) represents the impulse response of the noise filter, Γ(α) represents the gamma function, α represents the parameter controlling the spectral characteristics of the noise, and u(t) represents the unit step function.

Images