Zinc casting hearth liquid level detection device

Abstract

The embodiment of the invention relates to the technical field of liquid level measurement, and discloses a zinc casting hearth liquid level detection device which comprises a mounting plate. An upper chamber is arranged on the mounting plate, a control panel is arranged in the upper chamber, a lower protection wall is arranged at the lower part of the mounting plate, a receiver and an emitter are arranged at the inner ring position of the lower protection wall, and the control panel is connected with and controls the receiver and the emitter and measures the distance between the lower part of the mounting plate and a charge level through the receiver and the emitter; a plurality of flange holes are formed in the mounting plate and used for being fixed to the top of a casting hearth. According to the method, the liquid level of the zinc casting liquid can be detected, so that the average liquid level is conveniently and comprehensively calculated, the actual liquid level after feeding can be accurately calculated in advance regardless of the viscosity degree of the zinc casting liquid, the necessity of manual intervention operation is remarkably reduced, and the system control accuracy is effectively improved; and finally, automatic and continuous feeding is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid level measurement, in particular to the technical field of instruments for measuring volume, volume flow, liquid level or metering by means of volume. Background Art

[0002] The electrolytic zinc smelting and casting production line is increasingly developing in the direction of scale, automation and intelligence. The feeding, slag removal, stacking and bundling are all automated, but the frequency of feeding still requires manual intervention, and it cannot be interlocked with the electric furnace to achieve true automatic and continuous feeding.

[0003] The main difficulty in detecting the liquid level in the electrolytic zinc smelting furnace is that, on the one hand, the temperature of the zinc molten liquid is relatively high, and contact-type liquid level detection (such as setting a reference float) is basically not applicable. On the other hand, the zinc molten liquid is relatively viscous during feeding, and the non-contact single-point liquid level detection cannot accurately reflect the actual liquid level after feeding. In addition, the viscosity of the zinc molten liquid may be different each time feeding, and it is impossible to simply and directly set the delay parameters to correct the liquid level data. This results in the feeding process still requiring manual intervention. Summary of the invention

[0004] The object of the present invention is to provide a zinc smelting furnace liquid level detection device, which can detect the liquid level of the zinc molten casting liquid, thereby facilitating the comprehensive calculation of the average liquid level, and further ensuring that regardless of the viscosity of the zinc molten casting liquid, the actual liquid level after feeding can be accurately calculated in advance, ultimately facilitating the realization of automatic continuous feeding.

[0005] In order to solve the above technical problems, the present invention provides a zinc smelting furnace liquid level detection device, including a mounting plate; the mounting plate is provided with an upper chamber, the upper chamber is equipped with a control panel, the lower part of the mounting plate is provided with a lower protective wall, the inner circle of the lower protective wall is provided with a receiver and a transmitter, the control panel is connected to control the receiver and the transmitter and measures the distance between the bottom of the mounting plate and the material surface through the receiver and the transmitter; a plurality of flange holes are provided on the mounting plate for fixing on the top of the casting furnace.

[0006] The transmitter is in array form, and the directional pattern function of multiple transmitters is:

[0007]

[0008] In the formula, (x n ,y n ) are the coordinates of the nth transmitter in the subarray, (θ0, φ0) are the specified beam scanning angles, (θ, φ) are the mounting angles of the antenna, λ is the wavelength, and j is the carrier frequency.

[0009] When the mounting plate is fixed on the top of the casting furnace, a feed pipe is provided on the opposite side of the mounting plate from the top of the casting furnace in vertical projection; the top of the upper chamber is covered with a top cover which is made of transparent material, and the upper chamber and the top cover are sealed.

[0010] The control board is connected to control the receiver and the transmitter through a signal board and a communication board, wherein the control board is used to realize timing control and external data reception and transmission, the signal board is used to realize signal generation and signal analysis, and the communication board is used to directly connect the control receiver and the transmitter to transmit and receive electromagnetic wave signals.

[0011] The signal board is provided with a signal analysis module, an FFT unit and a signal generator. The signal generator is used to generate an electromagnetic wave signal of a specific frequency according to a control instruction. The FFT unit is used to divide the electromagnetic wave signal into multiple groups according to the frequency. The signal analysis module is used to obtain liquid level data and calculate the expected liquid level according to the analysis of multiple groups of electromagnetic wave signals.

[0012] The communication board is provided with a phase shifter, a beam splitter and a beam combiner. The phase shifter is used to shift the phase of the electromagnetic wave signal to generate an array beam. The beam splitter divides the electromagnetic wave signal into multiple beams according to the number of transmitters. The beam combiner is used to receive signals from multiple receivers and combine the signals from multiple receivers and then send them to the signal board.

[0013] The signal board is fixed at a hole position in the mounting plate, the communication board is fixed to the bottom surface of the mounting plate, and the receiver and the transmitter are welded on the communication board.

[0014] The receiver is a high temperature radar; the receiver and the transmitter are both multiple and evenly distributed in an array.

[0015] The transmitter is located at the center of the gap where the receiver array is distributed.

[0016] The pattern function of the transmitter takes the following form:

[0017]

[0018] Where d1 is the transmitter row spacing, d2 is the transmitter column spacing, θ is the longitudinal angle of the beam direction from the normal direction of the transmitter distribution plane, φ is the transverse angle of the beam direction from the normal direction of the transmitter distribution plane, δ and β are the phase shifts within the array, N is the number of columns of transmitter distribution, M is the number of rows of transmitter distribution, and λ is the carrier wavelength. For the phase shifts δ and β within the array, we have:

[0019]

[0020] Where d1 is the emitter row spacing, d2 is the emitter column spacing;

[0021] The signal received by the receiver is processed according to the mathematical model of the uniform array receiving signal:

[0022]

[0023] In the formula, A x is the direction matrix corresponding to the N receivers on the x-axis, A y is the direction matrix corresponding to the m receivers on the y-axis, D i (·) is the i-th row of the matrix as the diagonal element of the diagonal matrix; j is the carrier frequency, s i (t) is the i-th target signal, x i (t) is the signal received by the receiver in the i-th row, n i (t) is the noise factor, λ is the carrier wavelength, and the phase of the target signal is:

[0024]

[0025] Where, d r is the receiver spacing, θ t is the incident direction and λ is the carrier wavelength.

[0026] Compared with the prior art, the present invention can detect the liquid level of the zinc molten casting liquid, thereby facilitating the comprehensive calculation of the average liquid level, thereby ensuring that regardless of the viscosity of the zinc molten casting liquid, the actual liquid level after feeding can be accurately calculated in advance, significantly reducing the necessity of manual intervention operations, effectively improving the accuracy of system control, and ultimately facilitating the realization of automatic continuous feeding.

[0027] 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, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0029] Figure 1 is a schematic diagram of the structure of at least one embodiment of the present invention;

[0030] Figure 2 yes Figure 1 Schematic diagram of the installation structure;

[0031] Figure 3 yes Figure 1 Schematic diagram of module connection of control board, signal board and communication board;

[0032] Figure 4 yes Figure 1 A schematic diagram of a distributed structure of receivers and transmitters;

[0033] Figure 5 yes Figure 1 Schematic diagram of another distribution structure of receivers and transmitters.

[0034] In the figure: 100 - zinc smelting furnace liquid level detection device, 200 - feed pipe, 300 - casting furnace, 400 - liquid, 1 - mounting plate, 21 - upper chamber, 22 - lower protective wall, 3 - top cover, 41 - control board, 42 - signal board, 43 - communication board, 51 - receiver, 52 - transmitter. DETAILED DESCRIPTION

[0035] To make the purpose, technical solutions and advantages of the present invention clearer, each embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings. However, it will be appreciated by those skilled in the art that in each embodiment of the present invention, many technical details are proposed in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solution claimed in the present application can also be implemented. The division of the following embodiments is for the convenience of description and should not constitute any limitation on the specific implementation of the present invention. The various embodiments can be combined and referenced with each other without contradiction.

[0036] The first embodiment of the present invention relates to a zinc smelting furnace liquid level detection device, including a mounting plate 1; the mounting plate 1 has an upper chamber 21, the upper chamber 21 is equipped with a control board 41, the lower part of the mounting plate 1 has a lower protective wall 22, the inner circle of the lower protective wall 22 has a receiver 51 and a transmitter 52, the control board 41 connects and controls the receiver 51 and the transmitter 52 and measures the distance between the bottom of the mounting plate 1 and the material surface through the receiver 51 and the transmitter 52; the mounting plate 1 has a plurality of flange holes for fixing on the top of the casting furnace 300.

[0037] Generally, the receivers 51 or the transmitters 52 are arranged in an array.

[0038] When the transmitter 52 is in array form, the synthetic beam of the multiple transmitters 52 may be directional, and the directional pattern function of the beam is:

[0039]

[0040] In the formula, (x n ,y n ) is the coordinate of the nth array element (i.e., transmitter 52) in the subarray, (θ0, φ0) is the specified beam scanning angle, (θ, φ) is the installation direction angle of the antenna, λ is the wavelength, and j is the carrier frequency.

[0041] Even if there is only one receiver 51, based on the time of detecting the strongest point of the reflected signal from the signal transmission point, the function for calculating the distance R is:

[0042]

[0043] In the formula, c is the speed of light, and t0 is the time from the strongest point of the reflected signal to the signal emission point. In actual calculation, the unit based on t0 is 0.01μs (corresponding to a frequency of 100MHz) according to the machine operation sequence, so the speed of light c is taken as 3, especially to ensure that t0 is as small as possible during calculation to reduce calculation errors.

[0044] Therefore, based on the beam scanning angle (θ0, φ0) and the distance R, the position of any range below can be determined, and by continuously changing the beam scanning angle, the entire liquid surface can be scanned, thereby realizing the scanning and determination of the liquid surface shape and position. The scanning control method of the beam scanning angle can use the plane scanning in the prior art. Compared with the plane scanning in the prior art, the coordinates can be changed to the beam scanning angle (both are two-dimensional variables).

[0045] When the receiver 51 is in array form, assuming that there is only one transmitter 52, the receiver 51 forms a uniform array. Taking a uniform plane array as an example, the received signal is processed according to the mathematical model of the uniform array receiving signal:

[0046]

[0047] In the formula, A x is the direction matrix corresponding to the N array elements on the x-axis, A y is the direction matrix corresponding to the m array elements on the y-axis, D i (·) is the i-th row of the matrix as the diagonal element of the diagonal matrix; j is the carrier frequency, s i (t) is the i-th target signal, x i (t) is the signal received by the array element in the i-th row, n i (t) is the noise figure and λ is the carrier wavelength.

[0048] In the case where only the receiver 51 is in array form, since there is only one outgoing wave and it generally does not have a settable directionality (generally fixed downward), the echoed waveform must not only determine the direction based on the phase difference, but also determine the distance based on the timing. Therefore, the subsequent processing of liquid level detection is more troublesome. Although based on the above and combined with existing technical means, the detection effect can be achieved for a relatively flat liquid surface, but just like the ultrasonic radar in the prior art for surface detection, the overall effect is not ideal and the error is large.

[0049] The receiver 51 and the transmitter 52 are separated rather than integrated into one structure, mainly because the manufacturing cost and maintenance cost can be significantly reduced. Compared with the integrated structure, the separated structure only needs to configure the components independently and weld and fix them in a more conventional manner. Generally, there is no need to consider issues such as how to integrate the TR components in the integrated structure. The receiver 51 and the transmitter 52 can be directly connected to the control chip through the on-board circuit.

[0050] The second embodiment of the present invention is substantially the same as the first embodiment, mainly in that the technical details are further optimized. When the mounting plate 1 is fixed to the top of the casting furnace 300, a feed pipe 200 is provided on the side of the top of the casting furnace 300 opposite to the mounting plate 1 in vertical projection.

[0051] Furthermore, the top of the upper chamber 21 is covered with a top cover 3 , which is made of a transparent material, and the upper chamber 21 and the top cover 3 are sealed.

[0052] Furthermore, the receiver 51 is a high temperature radar. Specifically, the withstand temperature of the receiver should be higher than 700°C.

[0053] Furthermore, the receiver 51 and the transmitter 52 are both multiple and evenly distributed in an array. Therefore, the signal transmission and reception of the receiver 51 and the transmitter 52 can be controlled by using the phased array radar method in the prior art to accurately scan the liquid surface of the slurry 400, thereby obtaining the three-dimensional data of the liquid surface of the zinc molten casting liquid 400, and then the average liquid level can be calculated according to the three-dimensional data of the liquid surface using the average liquid level height calculation formula, and the average liquid level is the actual liquid level of the current slurry 400.

[0054] Therefore, the most preferred solution of the present invention is to comprehensively adopt the two methods of the aforementioned receiver 51 in array form and the transmitter 52 in array form. At this time, the directional pattern function of the transmitter 52 can be simplified to a multi-beam basic form:

[0055]

[0056] Wherein, d1 is the row spacing of the transmitter 52, d2 is the column spacing of the transmitter 52, θ is the longitudinal angle of the beam direction deviating from the normal direction of the distribution plane of the transmitter 52, φ is the transverse angle of the beam direction deviating from the normal direction of the distribution plane of the transmitter 52, δ and β are the phase shifts within the array, N is the number of columns of the transmitter 52 distribution, M is the number of rows of the transmitter 52 distribution, and λ is the carrier wavelength.

[0057] Among them, for the phase shifts δ and β within the array, we have:

[0058]

[0059] Wherein, d1 is the row spacing of the emitters 52, and d2 is the column spacing of the emitters 52.

[0060] Therefore, when scanning the beam, the longitudinal angle θ and the lateral angle φ are continuously changed according to a preset method, so that the beam direction can be controlled to change continuously.

[0061] In actual operation, the installation positions and model parameters of the receiver 51 and the transmitter 52 are known, and the situation where any group of transmitters 52 generates multiple beams at the same time is not considered. Therefore, the directivity of any beam can be obtained in a relatively simplified manner:

[0062]

[0063] Where ε is the transmitter aperture efficiency and A is the transmitter unit area.

[0064] Generally speaking, the best effect is to generate a total of four beams, starting from the four corners of the arbitrarily selected rectangle and scanning inward. For the formation of four beams, a relatively simple feasible solution is to divide the transmitter array into four equally divided sub-arrays, and control the beam scanning in the above manner for each sub-array.

[0065] The receiver 51 adopts an array form, which is convenient for receiving beams in multiple directions at the same time and calculating the distances in multiple directions at the same time. At this time, the processing is also based on the mathematical model of the uniform array receiving signal. Since the direction of the target signal can be determined, the target signal needs to consider the phase φ r :

[0066]

[0067] Where, d r is the array element spacing, θ t is the incident direction, and λ is the carrier wavelength. By using Fourier transform, the four beams in different directions are extracted from the signal of the receiver 51 and can be processed separately for beam combining.

[0068] Furthermore, the transmitter 52 is located at the center of the gap between the arrays of the receivers 51. This ensures the accuracy of the signal received by the receiver 51 and facilitates installation. In addition, since the polarization beam combining calculation is performed based on the position of the receiver 51 in subsequent processing, this method is also conducive to simplifying the polarization beam combining calculation parameters.

[0069] In another possible implementation, Figure 4 As shown, the receiver 51 and the transmitter 52 are distributed in a circular array, and the comprehensive directional pattern of the transmitter 52 can be another way:

[0070]

[0071] Where J'1(·) is the derivative function of the first-order Bessel function, μ nis the derivative of the Bessel function J'1(πμ m ), r is the voltage ratio of the main beam to the side lobe, is the control parameter.

[0072] The third embodiment of the present invention is roughly the same as the first embodiment, mainly in that the technical details are further optimized. The control board 41 connects the control receiver 51 and the transmitter 52 through the signal board 42 and the communication board 43, wherein the control board 41 is used to realize timing control and external data reception and transmission, the signal board 42 is used to realize signal generation and signal analysis, and the communication board 43 is used to directly connect the control receiver 51 and the transmitter 52 to transmit and receive electromagnetic wave signals.

[0073] It is easy to understand that, compared with the TR assembly of the prior art, since the transmitter 52 and the receiver 51 are separated in the present invention, the communication board 43 is used in this embodiment to substantially replace the function of the TR assembly. It is easy to understand that the circuit connected to the transmitter 52 includes a power amplifier circuit and a power supply circuit, but as a radar control circuit, the power amplifier circuit and the power supply circuit are conventional technical means, so they are not repeated in the present invention.

[0074] It is easy to see that, under the premise that the transmitter 52 and the receiver 51 are separated, the signal board 42 and the communication board 43 operate synchronously based on dual channels, so signals are received while sending signals. For signals with different timings, the carrier frequency can be adjusted through the transmitting channel (while also changing the carrier wavelength), so that the receiving channel can effectively distinguish when receiving the signal reflected from the liquid surface.

[0075] The signal board 42 is mainly used to realize, generate signals, and receive the combined beam signal for Fourier processing. In some specific cases, it can also be used to set the parameters of the split beam signal.

[0076] Furthermore, the signal board 42 is provided with a signal analysis module, an FFT unit and a signal generator. The signal generator is used to generate an electromagnetic wave signal of a specific frequency according to the control instruction, the FFT unit is used to divide the electromagnetic wave signal into multiple groups according to the frequency, and the signal analysis module is used to obtain liquid level data and calculate the expected liquid level according to the analysis of multiple groups of electromagnetic wave signals. Therefore, the signal board 42 essentially realizes the conversion calculation of the signal, including converting data and instructions into signals to be transmitted, and converting received signals into data required by the upper control system.

[0077] During operation, the signal generator needs to continuously change the carrier frequency according to the timing to ensure that the signals between multiple adjacent timings are different enough for the signal analysis module to distinguish. From the above, it is easy to see that adjusting the carrier frequency is easy and will not affect the subsequent phase shifting beam splitting and beam combining processing. A relatively easy implementation method is the frequency hopping technology commonly used in the existing communication field.

[0078] In addition to sending and receiving signals, the communication board 43 is mainly used for beam splitting and beam combining.

[0079] Furthermore, the communication board 43 has a phase shifter, a beam splitter and a beam combiner. The phase shifter is used to shift the phase of the electromagnetic wave signal to generate an array beam. The beam splitter divides the electromagnetic wave signal into multiple beams according to the number of transmitters. The beam combiner is used to receive signals from multiple receivers and combine the signals of multiple receivers and then send them to the signal board 42. Therefore, in addition to completing the signal transmission between the communication board 43 and the receiver 51 and the transmitter 52, the more important role is to split and combine the signal according to the position of the receiver 51 and the transmitter 52 to achieve phase shift control of the phased array. The phase shifter realizes the phase shift of different array element signals according to the aforementioned directional pattern function, and finally completes the phase compensation of the array element signal.

[0080] For the case of multiple beams, the working mechanism of the beam splitter does not change, but the phase shifter needs to be operated in groups, and each group of array elements corresponds to a beam subarray. The control parameters of each group of array elements are stored separately in the phase shifter as a data structure unit such as an array. Therefore, compared with the phased array of the prior art, the present invention puts forward relatively higher requirements for the control of the phase shifter in the case of multiple beams, that is, the phase shifter adopts an independent chip with control function. In contrast, the beam splitter only needs to ensure that the number of signal beams completely corresponds to the number of transmitters 52, and the beam combiner only needs to ensure that the number of signal inputs completely corresponds to the number of receivers 51.

[0081] Preferably, the signal board 42 is fixed to a hole in the mounting plate 1 , the communication board 43 is fixed to the bottom surface of the mounting plate 1 , and the receiver 51 and the transmitter 52 are welded to the communication board 43 .

[0082] It is worth mentioning that all modules involved in this embodiment are logic modules. In practical applications, a logic unit can be a physical unit, or a part of a physical unit, or can be implemented as a combination of multiple physical units. In addition, in order to highlight the innovative part of the present invention, this embodiment does not introduce units that are not closely related to solving the technical problems proposed by the present invention, but this does not mean that other units do not exist in this embodiment. Typically, the control board 41 is used to communicate with the upper control system, and of course it should have functional modules for communication instructions and data processing, and the power supply also has an independent power supply voltage stabilization module, but these are essentially irrelevant to the core technical concept of the present invention, so they are not listed in this embodiment.

[0083] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A zinc casting furnace liquid level detection device, comprising a mounting plate (1), characterized in that: The mounting plate (1) has an upper chamber (21), the upper chamber (21) has a control panel (41) installed inside, the mounting plate (1) has a lower protective wall (22) at the lower part, the inner circle of the lower protective wall (22) has a receiver (51) and a transmitter (52), the control panel (41) is connected to control the receiver (51) and the transmitter (52) and measures the distance between the lower part of the mounting plate (1) and the material surface through the receiver (51) and the transmitter (52); the mounting plate (1) has a plurality of flange holes for fixing on the top of the casting furnace (300).

2. The zinc casting furnace liquid level detection device according to claim 1, characterized in that: The transmitter (52) is in array form, and the directional pattern function of the plurality of transmitters (52) is: In the formula, (x n ,y n ) is the coordinate of the nth transmitter (52) in the subarray, (θ0, φ0) is the specified beam scanning angle, (θ, φ) is the installation direction angle of the antenna, λ is the wavelength, and j is the carrier frequency.

3. The zinc casting furnace liquid level detection device according to claim 1, characterized in that: When the mounting plate (1) is fixed to the top of the casting furnace (300), in vertical projection, a feed pipe (200) is provided on the top of the casting furnace (300) opposite to the mounting plate (1); the top of the upper chamber (21) is covered with a top cover (3), the top cover (3) is made of a transparent material, and the upper chamber (21) and the top cover (3) are sealed.

4. The zinc casting furnace liquid level detection device according to claim 1, characterized in that: The control board (41) is connected to the control receiver (51) and the transmitter (52) via the signal board (42) and the communication board (43), wherein the control board (41) is used to realize timing control and external data transmission and reception, the signal board (42) is used to realize signal generation and signal analysis, and the communication board (43) is used to directly connect the control receiver (51) and the transmitter (52) to transmit and receive electromagnetic wave signals.

5. The zinc casting furnace liquid level detection device according to claim 4, characterized in that: The signal board (42) is provided with a signal analysis module, an FFT unit and a signal generator, the signal generator is used to generate an electromagnetic wave signal of a specific frequency according to a control instruction, the FFT unit is used to divide the electromagnetic wave signal into multiple groups according to the frequency, and the signal analysis module is used to obtain liquid level data and calculate the expected liquid level according to the analysis of the multiple groups of electromagnetic wave signals.

6. The zinc casting furnace liquid level detection device according to claim 4, characterized in that: The communication board (43) is provided with a phase shifter, a beam splitter and a beam combiner. The phase shifter is used to shift the phase of the electromagnetic wave signal to generate an array beam. The beam splitter divides the electromagnetic wave signal into multiple beams according to the number of transmitters. The beam combiner is used to receive signals from multiple receivers and combine the signals from the multiple receivers and then send them to the signal board (42).

7. The zinc casting furnace liquid level detection device according to claim 4, characterized in that: The signal board (42) is fixed to a hole in the mounting plate (1), the communication board (43) is fixed to the bottom surface of the mounting plate (1), and the receiver (51) and the transmitter (52) are welded to the communication board (43).

8. The zinc casting furnace liquid level detection device according to claim 1, characterized in that: The receiver (51) is a high temperature radar; the receiver (51) and the transmitter (52) are both multiple and evenly distributed in an array.

9. The zinc casting furnace liquid level detection device according to claim 8, characterized in that: The transmitter (52) is located at the center of the gap where the receiver (51) array is distributed.

10. The zinc casting furnace liquid level detection device according to claim 8, characterized in that: The directional pattern function of the transmitter (52) takes the following form: In the formula, d1 is the row spacing of the transmitter (52), d2 is the column spacing of the transmitter (52), θ is the longitudinal angle of the beam direction deviating from the normal direction of the distribution plane of the transmitter (52), φ is the transverse angle of the beam direction deviating from the normal direction of the distribution plane of the transmitter (52), δ and β are the phase shifts within the array, N is the number of columns of the transmitter (52), M is the number of rows of the transmitter (52), and λ is the carrier wavelength; for the phase shifts within the array δ and β: Wherein, d1 is the row spacing of the emitters (52), and d2 is the column spacing of the emitters (52); The signal received by the receiver (51) is processed according to the mathematical model of the uniform array receiving signal: In the formula, A x is the direction matrix corresponding to the N receivers (51) on the x-axis, A y is the direction matrix corresponding to the m receivers (51) on the y-axis, D i (·) is the i-th row of the matrix as the diagonal element of the diagonal matrix; j is the carrier frequency, s i (t) is the i-th target signal, x i (t) is the signal received by the array element in the i-th row, n i (t) is the noise factor, λ is the carrier wavelength, and the phase of the target signal is: Where, d r is the receiver (51) spacing, θ t is the incident direction and λ is the carrier wavelength.

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