Control method and control system of function fusion type transparent antenna and antenna

Abstract

The invention relates to a control method and a control system of a function fusion type transparent antenna and the antenna, and the control method comprises the following steps: collecting the current environment temperature of an antenna main body, and arranging the antenna main body in a signboard; whether the current temperature change rate exceeds a first threshold value or not is judged; when the temperature change rate is smaller than or equal to the first threshold value, the current environment temperature of the antenna body continues to be collected; when the temperature change rate is larger than a first threshold value, the antenna body is controlled to adjust the transmitting power for temperature compensation so that the signal coverage radius of the antenna body can be not smaller than a preset value, and the method comprises the following steps that the output power, the antenna efficiency and the nonlinear thermal response function value of the antenna body at the current environment temperature are calculated respectively, and according to the output power, the antenna efficiency and the nonlinear thermal response function value, calculating the transmitting power required by the antenna main body at the current environment temperature, and controlling the antenna main body to output according to the transmitting power.

Description

Technical Field

[0001] The present invention relates to the field of antenna technology, and in particular to a control method, a control system and an antenna for a functional fusion transparent antenna. Background Art

[0002] Transparent antennas are widely used in scenes with high requirements for environmental aesthetics, such as shopping malls, exhibition halls, and public areas, because of their signal transmission function and concealment. However, existing transparent antennas are usually complex in structure, high in cost, and have a single function. They can only be used for signal transmission and fail to effectively utilize the space resources of their installation environment.

[0003] On the other hand, signboards are common indication and display devices and are widely used in indoor areas with large traffic. However, traditional signboards have a single function and can only provide visual information. In order to improve the utilization rate of these signboards, there are solutions in the prior art to integrate antennas into traditional signboards, which can better utilize the signboards distributed at multiple points indoors. However, lighting equipment such as LED lights are generally installed in signboards to improve the display effect. However, these lights generate heat when working, causing the temperature inside the signboard to rise. This temperature change can easily have a negative impact on the performance of the antenna integrated with the signboard, causing changes in antenna performance and unstable signals. Summary of the invention

[0004] The purpose of the present invention is to provide a control method, a control system and an antenna for a functionally integrated transparent antenna, which can integrate the functions of the identification plate and the transparent antenna, so as to meet the identification requirements and have the signal transmission function, saving equipment installation space and cost; at the same time, it can monitor the current ambient temperature around the antenna body in real time, and dynamically adjust the transmission power of the antenna body to compensate for temperature changes, ensure that the signal coverage radius of the antenna body is not less than the preset value, and improve the stability of signal coverage.

[0005] To achieve the above object, according to a first aspect of the present invention, a control method for a functional fusion transparent antenna is provided, comprising the following steps: Collecting the current ambient temperature of the antenna body, the antenna body being built into the identification plate; Determine whether the current temperature change rate exceeds a first threshold; When the temperature change rate is less than or equal to the first threshold, continue to collect the current ambient temperature of the antenna body; When the temperature change rate is greater than a first threshold, controlling the antenna body to adjust the transmission power for temperature compensation so that the signal coverage radius of the antenna body is not less than a preset value; When the temperature change rate is greater than a first threshold, controlling the antenna body to adjust the transmission power for temperature compensation so that the signal coverage radius of the antenna body is not less than a preset value comprises the following steps: The output power, antenna efficiency and nonlinear thermal response function value of the antenna body at the current ambient temperature are calculated respectively, the transmission power required by the antenna body at the current ambient temperature is calculated according to the output power, antenna efficiency and nonlinear thermal response function value, and the antenna body is controlled to output according to the transmission power.

[0006] Optionally, the transmit power is calculated according to the following formula: : ; in, is the output power required by the antenna body at the current ambient temperature, is the antenna efficiency of the antenna body at the current ambient temperature, is the reference power of the antenna body at the reference temperature, is the nonlinear thermal response function, , , is the temperature regulation coefficient, is the current ambient temperature, is the reference temperature.

[0007] Optionally, the antenna efficiency of the antenna body at the current ambient temperature is obtained by the following formula: ; in, is the reference efficiency of the antenna body at the reference temperature, is the temperature sensitivity coefficient of the antenna efficiency.

[0008] Optionally, the nonlinear thermal response function is obtained by the following formula: ; in, , is the nonlinear thermal response coefficient.

[0009] Optionally, after the step of controlling the antenna body to adjust the transmission power for temperature compensation so that the signal coverage radius of the antenna body is not less than a preset value when the temperature change rate is greater than a first threshold, the following steps are also included: Determining whether the temperature change rate exceeds a second threshold; When the temperature change rate is less than or equal to the second threshold, continue to collect the current ambient temperature of the antenna body; When the temperature change rate is greater than a second threshold, error correction is performed on the adjusted transmit power.

[0010] Optionally, the error-corrected transmit power is calculated according to the following formula: : ; ; in, is the temperature change rate function, is the historical temperature at a certain moment in the past, A time at a certain moment in the past, is the time decay factor, is the linear coefficient of temperature change rate, is the initial coefficient of the exponential decay of the temperature change rate.

[0011] According to a second aspect of the present invention, there is provided an antenna control system, the antenna control system being used to execute the control method, the antenna control system comprising: A temperature sensor is disposed in the identification plate and is used to detect the current ambient temperature around the antenna body; A control and adjustment system is connected to the temperature sensor and the antenna body, and is used to calculate the temperature change rate according to the current ambient temperature detected by the temperature sensor, and control the antenna body to adjust the transmission power for temperature compensation so that the signal coverage radius of the antenna body is not less than a preset value.

[0012] According to a third aspect of the present invention, there is provided a functional fusion transparent antenna, comprising a sign, an antenna body and the antenna control system.

[0013] Optionally, a lighting assembly and a slot are provided in the identification plate, and the antenna body is replaceably provided in the slot; The antenna body comprises a radiation unit, a feeder, a connector for connecting the feeder and the radiation unit, and a shell for protecting the antenna body, and a heat insulation layer is arranged outside the shell.

[0014] The beneficial effects of the present invention are as follows: the functions of the signboard and the transparent antenna are integrated to meet the identification requirements and have the signal transmission function, thus overcoming the defect of the traditional signboard with a single function and saving equipment installation space and cost; a temperature sensor is arranged inside the signboard to monitor the current ambient temperature around the antenna body in real time, and the transmission power of the antenna body is dynamically adjusted through the control and adjustment system to compensate for temperature changes, thereby ensuring that the signal coverage radius of the antenna body is not less than a preset value, and effectively solving the influence of temperature changes caused by the heating of the light inside the signboard on the signal coverage range of the antenna body, thereby improving the stability of signal coverage.

[0015] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic flow chart of a control method of a functional fusion type transparent antenna shown in one embodiment of the present invention; Figure 2 is a schematic flow chart of a control method of a functional fusion type transparent antenna shown in another embodiment of the present invention; Figure 3 This is a schematic module structure diagram of a functional fusion type transparent antenna shown in an embodiment of the present invention; In the figure: 1. antenna control system; 11. temperature sensor; 12. control and adjustment system; 2. identification plate; 3. antenna body; 31. radiation unit; 32. feeder; 33. connector; 34. shell. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0020] See also Figure 1 A control method for a functional fusion transparent antenna shown in a preferred embodiment of the present application includes the following steps: Step S10: collecting the current ambient temperature of the antenna body 3, where the antenna body 3 is built into the identification plate 2; Step S20: determining whether the current temperature change rate exceeds a first threshold; Step S30: When the temperature change rate is less than or equal to the first threshold, continue to collect the current ambient temperature of the antenna body 3; When the temperature change rate is greater than the first threshold, the antenna body 3 is controlled to adjust the transmission power for temperature compensation so that the signal coverage radius of the antenna body 3 is not less than a preset value.

[0021] When the temperature change rate is greater than the first threshold, the step of controlling the antenna body 3 to adjust the transmission power for temperature compensation so that the signal coverage radius of the antenna body 3 is not less than a preset value includes the following steps: The output power, antenna efficiency and nonlinear thermal response function value of the antenna body 3 at the current ambient temperature are calculated respectively, and the transmission power required by the antenna body 3 at the current ambient temperature is calculated according to the output power, antenna efficiency and nonlinear thermal response function value, and the antenna body 3 is controlled to output according to the transmission power.

[0022] The first threshold in step S20 is a set value, which is used to reflect whether a short-term large-scale temperature fluctuation occurs in the environment where the antenna body 3 is located.

[0023] It should be noted that in order to ensure the stability of the antenna's coverage at different temperatures, the traditional approach is to set up an active temperature compensation system, such as a heater and cooling system, to ensure the stability of the antenna temperature. However, this method has a slow response, especially when the temperature fluctuates for a short time, and cannot promptly solve the problem of reduced signal coverage. The solution of the present application, as an auxiliary control method for an antenna, can promptly deal with this special situation by changing the transmission power of the antenna body 3 when the temperature fluctuates for a short time.

[0024] According to the solution of the embodiment of the present invention, the functions of the signboard 2 and the transparent antenna are integrated to meet the identification requirements and have the signal transmission function, thus overcoming the defect of the traditional signboard 2 with a single function and saving equipment installation space and cost; a temperature sensor 11 is set in the signboard 2 to monitor the current ambient temperature around the antenna body 3 in real time, and the transmission power of the antenna body 3 is dynamically adjusted through the control and adjustment system 12 to compensate for the temperature change, thereby ensuring that the signal coverage radius of the antenna body 3 is not less than the preset value, effectively solving the influence of the temperature change caused by the heating of the light inside the signboard 2 on the signal coverage range of the antenna body 3, and improving the stability of the signal coverage.

[0025] The following is a detailed description with specific embodiments: The signal coverage range of the antenna is directly related to its transmission power, which is affected by temperature changes. Without temperature compensation, the signal coverage radius of the antenna may change in different temperature environments, resulting in unstable communication quality. The output power required to be compensated for by the antenna body 3 is calculated, and the antenna loss is compensated for the output power by calculating the corresponding antenna efficiency to obtain the initial transmission power. At the same time, a nonlinear thermal response function is introduced to further correct the power loss caused by thermal effects, so that the final calculated transmission power required to be compensated for by the antenna body 3 is more accurate.

[0026] Specifically, in this embodiment, the transmit power is calculated according to the following formula: : ; in, is the output power required by the antenna body 3 at the current ambient temperature, is the antenna efficiency of the antenna body 3 at the current ambient temperature, is the reference power of the antenna body 3 at the reference temperature, is the nonlinear thermal response function, , , is the temperature regulation coefficient, is the current ambient temperature, is the reference temperature. This formula uses a polynomial compensation model, which can better improve the compensation accuracy. Specifically, the linear term It mainly reflects the temperature change trend, the second-order term Considering the nonlinear temperature effect can improve the calculation accuracy, and the third-order term The nonlinear error is further corrected to make the compensation more accurate. Compared with the method of using only linear compensation, the formula model can more accurately match the actual measurement data, making the compensation more adaptable. Specifically, the temperature adjustment coefficient can be fitted experimentally. , , When determining the antenna efficiency and nonlinear thermal response function value at different ambient temperatures, first determine the preset value of the signal coverage radius at the reference temperature and use it as a benchmark, then adjust the transmission power of the antenna body 3 at different ambient temperatures, and use the receiver to measure the signal strength at the edge of the target signal coverage radius to ensure that the signal coverage radius of the antenna body 3 is constant, and record the transmission power at the corresponding temperature. The temperature adjustment coefficient is obtained by performing nonlinear fitting through the above formula model. , , .

[0027] Specifically, in this embodiment, the antenna efficiency at the current ambient temperature is obtained by the following formula: ; in, is the reference efficiency of the antenna body 3 at the reference temperature, is the temperature sensitivity coefficient of antenna efficiency. In practical applications, antenna efficiency usually decreases with increasing temperature, mainly affected by factors such as increased resistance of conductive materials and changes in dielectric loss. This formula can directly reflect this trend linearly, making it consistent with the experimental data fitting results. Specifically, the antenna efficiency under different ambient temperatures can be measured by experimental methods such as darkroom measurement, and the temperature sensitivity coefficient can be obtained by linear fitting through the above formula. .

[0028] Specifically, in this embodiment, the nonlinear thermal response function is obtained by the following formula: ; in, , is the nonlinear thermal response coefficient. Since the conductivity, dielectric constant and other properties of many transparent antenna materials often change nonlinearly when heated, these material properties will affect the antenna efficiency, and the use of linear compensation may lead to large errors. This formula uses an exponential function to describe the effect of temperature on antenna efficiency, which can more accurately fit the nonlinear characteristics of the material changing with temperature. Specifically, in this embodiment, Refers to the current ambient temperature Antenna efficiency at reference temperature Therefore, by measuring the antenna efficiency of the antenna body 3 at different ambient temperatures, the nonlinear thermal response function value can be obtained, and then the nonlinear thermal response coefficient can be obtained by fitting the curve data through the above formula. , .

[0029] If the temperature change rate is too fast, the transmission power that the antenna body 3 needs to compensate needs to take into account the time delay effect to perform dynamic response. Figure 2 After step S30, the following steps are also included: Step S40: determining whether the temperature change rate exceeds a second threshold; Step S50: When the temperature change rate is less than or equal to the second threshold, continue to collect the current ambient temperature of the antenna body 3; When the temperature change rate is greater than a second threshold, error correction is performed on the adjusted transmit power.

[0030] It should be noted that the second threshold is greater than the first threshold. The first threshold is used to determine whether the rate of change of the current ambient temperature exceeds the normal range, so as to determine whether the temperature compensation mechanism needs to be started. The first threshold should be set relatively low so that the temperature compensation can be started when the temperature change rate is small, so as to avoid the signal coverage range being unstable due to response delay. The second threshold is used to determine whether the temperature change rate is too fast, so as to determine whether the transmission power needs to be further corrected to cope with rapid temperature fluctuations. The setting of the second threshold should ensure that when the temperature change rate exceeds this value, the transmission power can be smoothly adjusted by the error correction mechanism to reduce power fluctuations. Specifically, the threshold can be determined by experimentally measuring the change in the signal coverage radius of the antenna body under different temperature change rates. When the temperature change rate exceeds a certain value, the signal coverage radius begins to decrease significantly, and this value can be used as the first threshold. When the temperature change rate exceeds a certain value, the signal coverage radius begins to decrease significantly and the control and adjustment system 12 has adjustment hysteresis due to the excessively fast temperature change rate, and this value can be used as the second threshold.

[0031] The error-corrected transmit power is calculated according to the following formula : ; in, is the temperature change rate function, is the historical temperature at a certain moment in the past, is the time at a certain moment in the past. This formula can capture the lag of temperature change and the response time of the control and regulation system 12. Through integral operation, it takes into account the time from the reference temperature Start to current ambient temperature The influence of the change on the transmission power of the antenna body 3 that needs to be compensated is not only based on the instantaneous adjustment of the current temperature, which improves the compensation accuracy. Through error correction, the transmission power of the antenna body 3 is smoothly adjusted with the temperature change, reducing the power fluctuation caused by the sudden change and improving the signal coverage stability of the antenna body 3. It should be noted that the historical temperature It is used to describe the cumulative effect of temperature change on the current output power of the antenna body 3. In actual situations, temperature change does not affect the power of the antenna body 3 instantly, but has a time lag effect, that is, the historical temperature at a certain moment in the past The integral term in this formula reflects the change from the reference temperature to the current transmit power that needs to be compensated. Start to current ambient temperature The effects of all historical temperatures between 1 and 2 are accumulated.

[0032] The temperature change rate function is obtained by the following formula: ; in, is the time decay factor, is the linear coefficient of the temperature change rate, is the initial coefficient of the exponential decay of the temperature change rate. In this formula, the linear part It represents the linear contribution of temperature to the rate of change and is applicable to the case where the temperature changes steadily. It represents the attenuation effect of the temperature change rate over time, which can compensate for the impact of instantaneous temperature jumps and is suitable for sudden change environments. When the temperature change rate is fast, the exponential decay term plays a major role to ensure that the transmission power is adjusted quickly. Specifically, when measuring By increasing the ambient temperature and recording the historical temperature The temperature change rate at different temperature points is calculated and a straight line is fitted to obtain When measuring and When the ambient temperature is increased, the temperature is first raised, and after the heat source is turned off, the historical temperature is continued to be recorded. Observe the attenuation trend of the temperature change rate over time and calculate the temperature change rate at different times The exponential curve fitting is performed to obtain and .

[0033] See also Figure 3The embodiment of the present invention further provides an antenna control system 1, which is used to execute the control method, and the antenna control system 1 includes a temperature sensor 11 and a control and adjustment system 12. The temperature sensor 11 is arranged in the sign 2 and is used to detect the current ambient temperature around the antenna body 3. The control and adjustment system 12 is connected to the temperature sensor 11 and the antenna body 3, and is used to calculate the temperature change rate according to the current ambient temperature detected by the temperature sensor 11, and control the antenna body 3 to adjust the transmission power for temperature compensation so that the signal coverage radius of the antenna body 3 is not less than a preset value. Through the cooperation of the temperature sensor 11 and the control and adjustment system 12, the influence of the temperature change caused by the heating of the light inside the sign 2 on the antenna signal coverage range can be effectively solved, and the stability of the signal coverage can be improved.

[0034] It should be noted that the control method involves real-time calculation and adjustment of multiple temperature parameters, which will consume certain system resources and may affect the overall efficiency of the system. To ensure the normal operation of the system, the inventors conducted a detailed resource consumption evaluation and optimization. The test environment uses an embedded processor and a temperature sampling frequency of 1Hz. The evaluation results show that a single temperature compensation calculation takes an average of about 5ms, the CPU resource occupancy rate is about 5%, and the remaining resources are sufficient to support other tasks. Through temperature mutation tests and 24-hour long-term running tests, it is verified that the system can respond to temperature mutations within 100ms, ensuring that the signal coverage range is stable, and the CPU occupancy rate remains below 10%, the memory occupancy rate is stable, and there is no resource leakage or performance degradation. For further optimization, the algorithm is simplified by replacing complex operations with piecewise linear approximation, and the hardware floating-point unit is used to accelerate the calculation, and the task priority is adjusted to ensure timely response to temperature mutations.

[0035] See also Figure 3 The embodiment of the present invention also provides a functional fusion transparent antenna, including a sign 2, an antenna body 3 and an antenna control system 1. The sign 2 is provided with a lighting component and a slot, and the antenna body 3 is replaceably arranged in the slot. The antenna body 3 includes a radiation unit 31, a feeder 32, a connector 33 for connecting the feeder 32 and the radiation unit 31, and a shell 34 for protecting the antenna body 3, and a heat insulation layer is arranged outside the shell 34. By arranging a slot in the sign 2, it is convenient to replace the antenna body 3 to adapt to different traffic flows or to replace the antenna body 3 in time when it is damaged to avoid affecting the user experience. The radiation unit 31, feeder 32 and shell 34 of the transparent antenna are integrated with the sign 2, so that the function of the transparent antenna is organically combined with the display function of the sign 2, reducing the repeated cost of installing the transparent antenna and the sign 2 separately, and improving the applicability and environmental friendliness of the device. The heat insulation layer is arranged outside the shell 34, which can reduce the impact of the increase in ambient temperature on the antenna body 3 to a certain extent.

[0036] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0037] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A control method for a functional fusion transparent antenna, characterized in that: The steps include: Collecting the current ambient temperature of the antenna body, the antenna body being built into the identification plate; Determine whether the current temperature change rate exceeds a first threshold; When the temperature change rate is less than or equal to the first threshold, continue to collect the current ambient temperature of the antenna body; When the temperature change rate is greater than a first threshold, controlling the antenna body to adjust the transmission power for temperature compensation so that the signal coverage radius of the antenna body is not less than a preset value; When the temperature change rate is greater than a first threshold, controlling the antenna body to adjust the transmission power for temperature compensation so that the signal coverage radius of the antenna body is not less than a preset value comprises the following steps: The output power, antenna efficiency and nonlinear thermal response function value of the antenna body at the current ambient temperature are calculated respectively, the transmission power required by the antenna body at the current ambient temperature is calculated according to the output power, antenna efficiency and nonlinear thermal response function value, and the antenna body is controlled to output according to the transmission power.

2. The control method of the functional fusion type transparent antenna according to claim 1, characterized in that: The transmit power is calculated according to the following formula : ； in, is the output power required by the antenna body at the current ambient temperature, is the antenna efficiency of the antenna body at the current ambient temperature, is the reference power of the antenna body at the reference temperature, is the nonlinear thermal response function, , , is the temperature regulation coefficient, is the current ambient temperature, is the reference temperature.

3. The control method of the functional fusion type transparent antenna according to claim 2, characterized in that: The antenna efficiency of the antenna body at the current ambient temperature is obtained by the following formula: ； in, is the reference efficiency of the antenna body at the reference temperature, is the temperature sensitivity coefficient of the antenna efficiency.

4. The control method of the functional fusion type transparent antenna according to claim 3, characterized in that: The nonlinear thermal response function is obtained by the following formula: ； in, , is the nonlinear thermal response coefficient.

5. The control method of the functional fusion type transparent antenna according to claim 1, characterized in that: After the step of controlling the antenna body to adjust the transmission power for temperature compensation so that the signal coverage radius of the antenna body is not less than a preset value when the temperature change rate is greater than the first threshold, the following steps are also included: Determining whether the temperature change rate exceeds a second threshold; When the temperature change rate is less than or equal to the second threshold, continue to collect the current ambient temperature of the antenna body; When the temperature change rate is greater than a second threshold, error correction is performed on the adjusted transmit power.

6. The control method of the functional fusion type transparent antenna according to claim 5, characterized in that: The error-corrected transmit power is calculated according to the following formula : ； ； in, is the temperature change rate function, is the historical temperature at a certain moment in the past, A time at a certain moment in the past, is the time decay factor, is the linear coefficient of the temperature change rate, is the initial coefficient of the exponential decay of the temperature change rate.

7. An antenna control system, characterized in that: The antenna control system is used to execute the control method according to any one of claims 1 to 6, and the antenna control system includes: A temperature sensor is disposed in the identification plate and is used to detect the current ambient temperature around the antenna body; A control and adjustment system is connected to the temperature sensor and the antenna body, and is used to calculate the temperature change rate according to the current ambient temperature detected by the temperature sensor, and control the antenna body to adjust the transmission power for temperature compensation so that the signal coverage radius of the antenna body is not less than a preset value.

8. A functional fusion transparent antenna, characterized in that: The invention comprises a sign, an antenna body and the antenna control system described in claim 7.

9. The functional fusion type transparent antenna according to claim 8, characterized in that: The identification plate is provided with a lighting assembly and a slot, and the antenna body is replaceably arranged in the slot; The antenna body comprises a radiation unit, a feeder, a connector for connecting the feeder and the radiation unit, and a shell for protecting the antenna body, and a heat insulation layer is arranged outside the shell.

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