Detection device for receiving state of sonar power amplifier

Abstract

The utility model relates to a device for detecting the receiving state of a sonar power amplifier, which comprises a sonar power amplifier pre-stage circuit, a sonar power amplifier post-stage circuit and a detection control display module, the detection control display module comprises a signal conditioning circuit and a micro-processing circuit, the output end of the sonar power amplifier pre-stage circuit is connected with the input end of the sonar power amplifier post-stage circuit, and the output end of the sonar power amplifier post-stage circuit is connected with the signal conditioning circuit. The output end of the sonar power amplifier post-stage circuit is connected with the input end of the signal conditioning circuit, the output end of the signal conditioning circuit is connected with the micro-processing circuit, the micro-processing circuit is connected with the upper computer to realize communication, and the signal conditioning circuit and the micro-processing circuit are both connected with the direct-current main power supply to provide driving power for the direct-current main power supply. Compared with the existing sonar power amplifier receiving state detection device, the device provided by the utility model detects the equivalent output impedance of the power amplifier circuit under different working frequencies under the condition that the system cannot work stably due to the interaction of the front and rear stages of the power amplifier in the sonar system, and ensures that the front and rear stage circuits in the sonar system can work stably.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of detection devices of sonar power amplifier receiving state, belong to the technical field of sonar receiving state. BACKGROUND

[0002] Sonar (Sonar) is the use of sound waves in water propagation and reflection characteristics, through electroacoustic conversion and information processing for navigation and ranging technology, also refers to the use of this technology to detect underwater targets (existence, location, nature, direction of movement, etc.) and communication electronic equipment, its name comes from the abbreviation of "Sound Navigation And Ranging". Sonar system works by emitting sound waves and receiving the echoes reflected back after these sound waves collide with objects, according to the propagation time of sound waves and the speed of sound waves, the position and distance of underwater objects can be calculated. Currently, sonar technology has been relatively mature, and has been widely used in the military field, in addition, sonar is also used in oceanography, underwater archaeology, fisheries and seabed topography surveying and mapping and other fields.

[0003] Among them, sonar power amplifier is an important part of sonar system. When sonar is in receiving state, the slight change of sound wave is detected by sonar power amplifier to amplify it. Ensure that the intensity of the signal is large enough to propagate in water and reach the required detection distance. Since sonar is usually used in harsh marine environment, the stability and reliability of the equipment are required, which can provide stable power amplification and signal processing function, and ensure the normal operation of sonar system under various complex marine conditions. At the same time, sonar power amplifier is also required to have protection and anti-interference ability, so that sonar can work stably in noisy and disturbed environment. Therefore, the sensitivity and noise suppression ability of sonar power amplifier are very important in sonar system, and an accurate detection device for detecting the receiving state of sonar power amplifier is needed. SUMMARY

[0004] The summary part of the present application is used to introduce the concept in a simple form, which will be described in detail in the specific embodiment part. The summary part of the present application is not intended to identify the key features or essential features of the claimed technical solution, nor is it intended to limit the scope of the claimed technical solution.

[0005] In view of the problems and deficiencies in the prior art, the utility model aims at providing a kind of detection device of sonar power amplifier receiving state, the receiving state of sonar power amplifier is detected by detection control display module, the receiving working state of sonar power amplifier is judged according to voltage current phase relation by microprocessing circuit, ensure that the equivalent output impedance of front stage is less than the equivalent output impedance of rear stage in the front and rear two stages of circuit in sonar system, to stabilize sonar system and reduce noise interference, improve target identification accuracy and system reliability. To solve the problems raised in the above background.

[0006] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme: including sonar power amplifier front stage circuit, sonar power amplifier back stage circuit and detection control display module, the detection control display module includes signal conditioning circuit and micro processing circuit, the output of sonar power amplifier front stage circuit is connected with the input of sonar power amplifier back stage circuit, the output of sonar power amplifier back stage circuit is connected with the input of signal conditioning circuit, the output of signal conditioning circuit is connected micro processing circuit, micro processing circuit is connected host computer and realizes communication, signal conditioning circuit and micro processing circuit are connected direct current main power supply and provide drive power supply for it.

[0007] Further, the micro processing circuit includes a single-chip microcomputer chip and an FPGA control chip, and a direct digital synthesizer in the FPGA control chip is used for generating a frequency-adjustable sinusoidal signal.

[0008] Further, the sonar power amplifier back stage circuit includes a transformer T, a capacitor C, diodes D1 and D2, the output of the sonar power amplifier front stage circuit is connected with the primary of the transformer T, the secondary of the transformer T is connected with the capacitor C, and the diodes D1 and D2 are connected in parallel with the capacitor C.

[0009] Further, the signal conditioning circuit includes a voltage dividing resistor and a voltage comparison chip, and the voltage comparison chip collects the voltage signal output by the sonar power amplifier back stage circuit for zero-crossing comparison.

[0010] Further, the micro processing circuit further includes a potentiometer for changing the amplitude of the output voltage of the micro processing circuit.

[0011] Further, the sonar power amplifier front stage circuit and the sonar power amplifier back stage circuit are two-stage circuits.

[0012] Further, the single-chip model adopts STC8G2K, and the FPGA control chip model adopts EP4CE6E22C8N. The STC8G2K series single-chip chip is an 8-bit MCU microcontroller product designed and produced by Macro Crystal Technology, and is widely used in various embedded systems, such as industrial control, smart home, medical equipment and the like. The FPGA is EP4CE6E22C8N model of Cyclone IV E series of the original ALTERA company, which is a field programmable logic device.

[0013] Further, the voltage comparison chip model adopts LM319N. LM319N is a general comparator produced by Texas Instruments, which can process high-speed signals as a comparator, and is suitable for circuit design requiring high speed and high precision.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The sonar power amplifier receiving state detection device provided by the utility model relates to a sonar power amplifier receiving state detection device, which comprises a sonar power amplifier pre-stage circuit, a sonar power amplifier post-stage circuit and a detection control display module, the output end of the sonar power amplifier pre-stage circuit is connected with the input end of the sonar power amplifier post-stage circuit, and the output end of the sonar power amplifier post-stage circuit is connected with the input end of the detection control display module. The power is amplified through the sonar power amplifier pre-stage circuit and the sonar power amplifier post-stage circuit, the voltage and current signals output by the sonar power amplifier post-stage circuit are converted into square wave current signals of the same frequency and phase through a signal conditioning circuit, the phase difference relationship of the voltage and current output by the signal conditioning circuit is judged through a micro processing circuit, the working state of the sonar power amplifier pre-stage circuit and post-stage circuit is judged, and the equivalent output impedance of the sonar power amplifier pre-stage circuit and post-stage circuit in the receiving state is calculated. Compared with the prior art, the utility model can detect the equivalent output impedance of the power amplifier circuit under different working frequencies when the pre-stage and post-stage of the power amplifier in the sonar system interact with each other and cause the system to be unable to work stably, and ensure that the pre-stage and post-stage circuit in the sonar system can work stably. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which form a part of this application, are used to provide further understanding of the application, so that other features, purposes and advantages of the application become more obvious. The illustrative embodiment drawings of the application and their descriptions are used to explain the application, and do not constitute undue limitation on the application.

[0017] In the drawings:

[0018] Figure 1 : it is the connection block diagram of the power amplifier receiving state detection device in the utility model;

[0019] Figure 2 : it is the transmission principle block diagram of the whole in the embodiment of the utility model;

[0020] Figure 3 : This is a graphical representation of the Middlebrook criterion in an embodiment of this utility model. Detailed Implementation

[0021] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0022] It should also be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0023] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] This embodiment provides a sonar power amplifier receiving status detection device, such as... Figure 1 As shown, the system includes a sonar power amplifier preamplifier circuit, a sonar power amplifier power amplifier power output circuit, and a detection, control, and display module. The detection, control, and display module includes a DC main power supply, a host computer, a microprocessor circuit, and a signal conditioning circuit. The DC main power supply connects to the signal conditioning circuit and the microprocessor circuit, providing DC power for both to start operation. The output of the sonar power amplifier preamplifier circuit is connected to the input of the sonar power amplifier power output circuit. The output of the sonar power amplifier power output circuit is connected to the input of the signal conditioning circuit in the detection, control, and display module. The output of the signal conditioning circuit is connected to the microprocessor circuit, which then connects to the host computer for communication and display.

[0025] The sonar power amplifier's output stage circuit includes a transformer T, a capacitor C, and diodes D1 and D2. The output of the sonar power amplifier's preamplifier circuit is connected to the primary input of transformer T. The secondary output of transformer T is connected to capacitor C, and diodes D1 and D2 are connected in parallel with capacitor C. The output of capacitor C is then connected to the detection, control, and display module to provide it with a current signal. The diodes in the sonar power amplifier's output stage circuit are used for amplitude limiting, preventing damage to other circuit components from excessively large or small signals, while also ensuring the stability of the output signal. Because the forward resistance of a diode is very small and its reverse resistance is very large, it can achieve signal limiting in both forward and reverse directions. The current and voltage signals output from capacitor C and the secondary output of transformer T are connected to the signal conditioning circuit in the detection, control, and display module.

[0026] The voltage and current signals outputted by the front-stage circuit and the rear-stage circuit of the sonar power amplifier are collected, and a square wave current signal with the same frequency and phase can be obtained by the signal conditioning circuit. The signal conditioning circuit includes a voltage dividing resistor and a voltage comparison chip. The voltage signal outputted by the rear-stage circuit of the sonar power amplifier is collected by the voltage dividing resistor, and the collected voltage signal is compared to zero by the voltage comparison chip. The voltage comparison chip is of type LM319N, and the voltage dividing resistor is of resistance value 5 mΩ. That is, when the input of the signal conditioning circuit is negative, the output is low; when the input of the signal conditioning circuit is positive, the output is high.

[0027] The micro-processing circuit is used to determine the working state of the front-stage circuit and the rear-stage circuit of the sonar power amplifier according to the phase difference relationship of the voltage and current outputted by the signal conditioning circuit, and to calculate the equivalent output impedance of the front-stage circuit and the rear-stage circuit of the sonar power amplifier in the receiving state, so as to ensure that the equivalent output impedance of the front-stage circuit of the sonar power amplifier is smaller than that of the rear-stage circuit. The micro-processing circuit includes a single-chip microcomputer and an FPGA control chip. The single-chip microcomputer is of type STC8G2K, and the FPGA control chip is of type EP4CE6E22C8N of Altera Company. The direct digital synthesizer (DDS) in the FPGA control chip generates a frequency-adjustable sinusoidal signal (100 mV), and the output voltage amplitude is changed by a potentiometer, so as to ensure that the diode in the rear-stage circuit of the sonar power amplifier is not turned on. The frequency-adjustable sinusoidal signal outputted by the micro-processing circuit can be used for detecting the sonar system under different working frequencies, and the amplitude thereof can be adjusted to set corresponding parameters for different diode turn-on voltage drops in the rear-stage circuit of the sonar power amplifier. The frequency-adjustable sinusoidal signal outputted by the micro-processing circuit is also sent to the front-stage circuit and the rear-stage circuit of the sonar power amplifier, and the ratio of the frequency-adjustable sinusoidal signal to the current signal is used to determine the output equivalent impedance of the front-stage circuit and the rear-stage circuit of the sonar power amplifier in the receiving state.

[0028] Specifically, the front-stage circuit and the rear-stage circuit of the sonar power amplifier both have the function of power amplification, but they are two-stage circuits. Essentially, the front-stage circuit and the rear-stage circuit of the sonar power amplifier can be regarded as two independent circuits, which can be adjusted only under the premise that the two independent circuits can work stably. However, in actual application, the interaction between the front-stage circuit and the rear-stage circuit may cause the sonar system to work unstably, which may result in problems such as excessive noise of the sonar system and target detection error. Therefore, it is particularly important to detect the circuit state of the front-stage circuit and the rear-stage circuit of the sonar power amplifier in the receiving state. The equivalent models of the front-stage circuit and the rear-stage circuit of the sonar power amplifier are shown in Figure 2 Figure 2 In the models, G1(s) is the transfer function of the rear-stage circuit of the sonar power amplifier, Z out1 ​G2(s) is the transfer function of the front stage circuit of the sonar power amplifier, Z out2 G2(s) is the transfer function of the front stage circuit of the sonar power amplifier, Z

[0029]

[0030] wherein, represents the ratio of the output impedance of the rear stage circuit of the sonar power amplifier to the input impedance of the front stage circuit of the sonar power amplifier, which determines whether the sonar system can work stably. Figure 3 As shown in the formula (1), according to the Middlebrook criterion, if the output impedance of the rear stage circuit of the sonar power amplifier is less than the input impedance of the front stage circuit of the sonar power amplifier, the entire sonar system can work stably.

[0031] The use method of the sonar power amplifier receiving state detection device

[0032] The use steps of the sonar power amplifier receiving state detection device are as follows:

[0033] Step 1: confirming the working states of the front stage circuit and the rear stage circuit of the sonar power amplifier.

[0034] Step 2: collecting the output current of the rear stage circuit of the sonar power amplifier and calculating the amplitude of the input sinusoidal voltage.

[0035] Step 3: the current voltage signal output by the rear stage circuit of the sonar power amplifier is processed in the signal conditioning circuit to obtain a square wave current signal of the same frequency and phase, which is sent to the micro processing circuit.

[0036] Step 4: the voltage current phase relationship comparison is carried out through the micro processing circuit to judge the working state of the front and rear stage power amplifier circuits in the receiving state and calculate the equivalent impedance of the output end of the front and rear stage power amplifier circuits.

[0037] Step 5: judging whether the front and rear stage power amplifier circuits meet the design requirements, and then sending the data to the upper computer and displaying the corresponding values on the upper computer.

[0038] In the description of the utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, a specific orientation and operation, and therefore cannot be understood as a limitation on the utility model.

[0039] In addition to the above embodiments, the utility model can have other implementation manners. For those skilled in the art, the technical scheme recorded in the above embodiments can still be modified, or part of the technical features can be replaced equivalently, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A device for detecting the state of a sonar power amplifier receiver, characterized by: The sonar power amplifier front stage circuit, the sonar power amplifier rear stage circuit and the detection control display module, the detection control display module includes signal conditioning circuit and micro processing circuit, the output of the sonar power amplifier front stage circuit is connected with the input of the sonar power amplifier rear stage circuit, the output of the sonar power amplifier rear stage circuit is connected with the input of the signal conditioning circuit, the output of the signal conditioning circuit is connected with the micro processing circuit, the micro processing circuit is connected with the host computer to realize communication, the signal conditioning circuit and micro processing circuit are connected with the direct current main power supply to provide driving power supply.

2. The detection device of a sonar power amplifier receiving state according to claim 1, characterized in that: The micro processing circuit includes single-chip microcomputer chip and FPGA control chip, and a direct digital synthesizer in the FPGA control chip is used to generate frequency-adjustable sinusoidal signal.

3. The detection device of a sonar power amplifier receiving state according to claim 1, characterized in that: The sonar power amplifier rear stage circuit includes transformer T, capacitor C, diode D1 and D2, the output of the sonar power amplifier front stage circuit is connected with the primary of the transformer T, the secondary of the transformer T is connected with the capacitor C, and the diode D1 and D2 are connected in parallel with the capacitor C.

4. The detection device of a sonar power amplifier receiving state according to claim 1, characterized in that: The signal conditioning circuit includes voltage dividing resistor and voltage comparison chip, and the voltage comparison chip collects the voltage signal output by the sonar power amplifier rear stage circuit to perform zero-crossing comparison.

5. The detection device of a sonar power amplifier receiving state according to claim 2, characterized in that: The micro processing circuit further includes potentiometer, which is used to change the amplitude of the output voltage of the micro processing circuit.

6. The detection device of a sonar power amplifier receiving state according to claim 1, characterized in that: The sonar power amplifier front stage circuit and the sonar power amplifier rear stage circuit adopt two-stage circuit.

7. The detection device of a sonar power amplifier receiving state according to claim 5, characterized in that: The model of the single-chip microcomputer chip is STC8G2K, and the model of the FPGA control chip is EP4CE6E22C8N.

8. The detection device of a sonar power amplifier receiving state according to claim 4, characterized in that: The model of the voltage comparison chip is LM319N.

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