CN210954336U - Fish detector - Google Patents
Fish detector Download PDFInfo
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- CN210954336U CN210954336U CN201921539295.4U CN201921539295U CN210954336U CN 210954336 U CN210954336 U CN 210954336U CN 201921539295 U CN201921539295 U CN 201921539295U CN 210954336 U CN210954336 U CN 210954336U
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Abstract
The utility model provides a fish finder, it includes: the signal generating module is electrically connected with the signal processing device and the standard transducer conversion module and is configured to output a transmitting signal to the standard transducer conversion module under the driving of the signal processing device; the output end of the signal receiving module is electrically connected with the signal processing device, and the input end of the signal receiving module is connected with the output end of the standard transducer conversion module through the transceiving conversion switch; the control end of the transmit-receive conversion switch is electrically connected with the signal processing device; and a matching transformer is arranged in the standard transducer conversion module, and a primary winding of the matching transformer is connected with the transducer interface. The adopted universal and configurable digital rear end enables the fish finder to adopt transducers of various types, only the rear end of the signal processing needs to be replaced in the upgrading process of the fish finder, and the transducers do not need to be upgraded synchronously in a dock.
Description
Technical Field
The utility model relates to a fishery field especially relates to a fish finder.
Background
The fish finder can be divided into an underwater transducer part and a main machine part placed in a cockpit. The fish finder transducer uses piezoelectric ceramics, the technology is mature, and the reliability and the service life are long. The host part of the fish detector develops rapidly, and with the rapid development of electronic devices and the application of new signal processing methods, the upgrading of the host can bring about the great improvement of the performance of the fish detector.
In addition, in recent years, the marine fishery develops to the deep open sea, the detection demand of fishermen on the sea is continuously improved, particularly, the implementation of a fishing boat networking project requires that a fishing boat carries a high-performance novel fish detector providing an acoustic data output interface, and the old fish detector needs to be replaced in a large amount.
Since transducers of different signals have different working frequencies, bandwidths and signal systems, the main machine of the fish finder needs to be matched with the transducers. Therefore, when the commercially available fish finder is replaced, the main machine and the transducer need to be replaced together, and the underwater transducer needs to be docked, which is expensive and laborious.
SUMMERY OF THE UTILITY MODEL
To the not enough among the above-mentioned prior art, the utility model provides a fish finder, this fish finder adopt digital rear end and adjustable interface for fish finder can adopt the transducer of different models.
In order to achieve the above object, the utility model provides a fish finder, it includes: the device comprises a signal processing device, a signal generating module, a signal receiving module, a transceiving switch and a standard transducer conversion module, wherein the signal processing device is used for processing signals;
the signal generating module is electrically connected with the signal processing device and the standard transducer conversion module and is configured to output a transmitting signal to the standard transducer conversion module under the driving of the signal processing device;
the output end of the signal receiving module is electrically connected with the signal processing device, and the input end of the signal receiving module is connected with the output end of the standard transducer conversion module through the transceiving conversion switch;
the control end of the transceiving conversion switch is electrically connected with the signal processing device;
and a matching transformer is arranged in the standard transducer conversion module, a primary winding of the matching transformer is connected with a transducer interface, and the transducer interface is used for being connected with a transducer.
Preferably, the signal generation module comprises a high-voltage power supply and a class-D power amplifier;
the high-voltage power supply is connected with a power supply port of the class D power amplifier, and the input end of the class D power amplifier is connected with the signal processing device;
the output end of the class D power amplifier is connected with the standard transducer conversion module; the signal processing device generates a switching signal for driving the D-type power amplifier through Delta-Sigma modulation; the working frequency, the bandwidth and the working mode of a transmitting signal generated by the class-D power amplifier under the control of the switching signal are matched with the transducer.
Preferably, the signal receiving module comprises a variable gain amplifier and an analog-to-digital converter;
the input end of the variable gain amplifier is connected with the transceiving switch; the output end of the variable gain amplifier is connected with the input end of the analog-to-digital converter;
the control end of the variable gain amplifier is connected with the signal processing device; the output end of the analog-to-digital converter is electrically connected with the signal processing device.
Preferably, the inductance L of the primary winding of the matching transformerpAt the operating frequency f of the transducer to be adaptedmEquivalent capacitance value C ofpThe following relationship is satisfied:
so that the transducer to be adapted is at the operating frequency fmThe lower output impedance is in a pure resistance state with a resistance value of Rp(ii) a The matching transformerHas such a number of turns that the output impedance of the transducer is converted to a standard resistance value R at the secondary winding of the matching transformerSThe number of turns of the primary winding and the secondary winding of the matching transformer meets the following condition:
wherein N ispFor the number of primary winding turns of said matching transformer, NsThe number of turns of the secondary winding of the matching transformer.
Preferably, the signal processing device is connected with a data transmission interface and/or a human-computer interaction interface.
Preferably, the signal processing device comprises one or more of an FPGA, a DSP, a general-purpose processor or an ASIC chip.
The utility model has the advantages of: the adopted universal and configurable digital back-end host enables the fish finder to adopt various types of transducers. The host computer of this fish finder still can be used to upgrading current fish finder, only needs to change signal processing's rear end at the in-process of upgrading for current transducer can use with the rear end collocation of fish finder in this application, needn't upgrade the transducer in step in the dock. In addition, a digital back-end host is adopted, so that a detection algorithm adopted by the fish detector can be upgraded according to requirements, the fish detector is provided with a standard data interface, underwater acoustic data can be reported or stored, and the functions of the fish detector can be expanded by externally connecting underwater acoustic processing equipment with specific functions.
Drawings
Fig. 1 is a schematic diagram of the fish detector of the utility model.
Detailed Description
The following description of the preferred embodiment of the present invention will be given in detail with reference to the accompanying drawings 1, so as to better understand the functions and features of the present invention.
Referring to fig. 1, an embodiment of the present invention includes a fish finder, which includes a signal processing device 1, a signal generating module 2, a signal receiving module 3, a transceiver switch 4 and a standard transducer converting module 5. In addition, the fish finder of the present embodiment further comprises a transducer, and the transducer is connected with the transducer interface of the standard transducer conversion module 5. The transducer is used for being arranged at the bottom of a fishing boat and is used for transmitting ultrasonic waves downwards and receiving reflected echoes.
The signal generating module 2 is used for sending a transmitting signal to the transducer through the standard transducer conversion module 5 under the control of the signal processing device 1 so as to drive the transducer to transmit ultrasonic waves. The signal generating module 2 is electrically connected with the signal processing device 1 and the standard transducer conversion module 5. The signal generation module 2 is configured to output a transmission signal to the standard transducer conversion module 5 under the drive of the signal processing apparatus 1.
The signal generating module 2 mainly comprises a high-voltage power supply 6 and a D-type power amplifier 7. The high-voltage power supply 6 is connected with a power supply port of the D-type power amplifier 7 and used for supplying power to the D-type power amplifier 7. The input end of the D-type power amplifier 7 is connected with the signal processing device 1. The output end of the class D power amplifier 7 is connected with the standard transducer conversion module 5. The signal processing device 1 generates a switching signal for driving a D-type power amplifier 7 through Delta-Sigma modulation; the working frequency, the bandwidth and the working mode of a transmitting signal generated by the D-type power amplifier 7 under the control of the switching signal are matched with the transducer. The class-D power amplifier can generate transmitting signals with different frequencies, bandwidths and working modes under the driving of the signal processing device 1, so that the transmitting signals can be adapted to transducers of various fish finders.
The output end of the signal receiving module 3 is electrically connected with the signal processing device 1. The input end of the signal receiving module 3 is connected with the output end of the standard transducer conversion module 5 through the transceiving conversion switch 4. The control end of the transmit-receive conversion switch 4 is electrically connected with the signal processing device 1. The transceiving switch 4 may be implemented by using a MOS transistor, a relay, or other switching circuits.
The signal receiving module 3 is configured to receive an echo signal received by the transducer under the control of the signal processing device 1, and amplify and perform analog-to-digital conversion on the received echo signal. The signal receiving module 3 includes a variable gain amplifier 8 and an analog-to-digital converter 9.
The input terminal of the variable gain amplifier 8 is connected to the transmission/reception changeover switch 4. The output of the variable gain amplifier 8 is connected to the input of an analog-to-digital converter 9. The control terminal of the variable gain amplifier 8 is connected to the signal processing device 1. The output end of the analog-to-digital converter 9 is electrically connected with the signal processing device 1. The analog-to-digital converter 9 performs analog-to-digital conversion on the signal output from the variable gain amplifier 8 to convert the signal into a digital signal, and inputs the digital signal to the signal processing device 1 for processing.
In the process of processing the echo signal by the signal receiving module 3, the variable gain amplifier 8 may convert the signal strength of the variable gain amplifier 8 according to a predetermined time-varying gain curve under the control of the signal processing apparatus 1.
The transducer interface of the standard transducer conversion module 5 is used for connecting with various transducers. And a matching transformer is arranged in the standard transducer conversion module 5, and a primary winding of the matching transformer is connected with the transducer interface. And the secondary winding of the matching transformer is connected with the output end of the D-type power amplifier 7 and the transceiving switch 4.
The fish detector has two states of transmitting signals and receiving echo signals.
When transmitting signals, the signal processing device 1 controls the class-D power amplifier 7 of the signal generation module 2 to output the transmission signals, the transmission signals finally act on the transducer through the matching transformer of the standard transducer conversion module 5, so that the transducer sends out ultrasonic waves downwards, and in the process, the signal processing device controls the transceiving conversion switch 4 to be in a disconnected state, so that the output signals of the class-D power amplifier 7 are prevented from directly acting on the input end of the variable gain amplifier 8.
In the process of returning the ultrasonic wave, the signal processing device 1 controls the signal generation module 2 to stop sending the signal. Meanwhile, the signal processing device 1 controls the switch to be switched on, the echo of the ultrasonic wave is converted by the transducer, then passes through the matching transformer of the standard transducer conversion module 5 and the switch 4 to act on the input end of the variable gain amplifier 8, and the signal is amplified and converted by the analog-to-digital converter to be a digital signal which is processed by the signal processing device 1.
The inductance value and the number of winding turns of the matching transformer in the standard transducer conversion module 5 and the transducer to be adapted to its operating frequency fmThe equivalent impedances of the following are matched. In order to adapt to different transducers, the matching transformer can be customized according to different transducers, and an adjustable transformer with adjustable turn ratio and adjustable primary inductance value can also be adopted.
Matching the inductance L of the primary winding of the transformer in a standard transducer conversion module 5pAt operating frequency f with the transducer to be adaptedmEquivalent capacitance value C ofpThe following relationship is satisfied:
so that the transducer to be adapted is at the operating frequency fmThe lower output impedance is in a pure resistance state with a resistance value of Rp. In one embodiment Rp75 Ω. The number of turns of the primary winding and the secondary winding of the matching transformer is such that the output impedance of the transducer is converted to a standard resistance value R at the secondary winding of the matching transformerSThe number of turns of the primary winding and the secondary winding of the matching transformer meets the following condition:
wherein N ispFor the number of primary winding turns of said matching transformer, NsThe number of turns of the secondary winding of the matching transformer. Impedance matching is performed so that different transducers have the same equivalent input impedance.
The signal processing device 1 may be implemented using any one or more of an FPGA, a DSP, a general-purpose processor, or an ASIC chip. The signal processing apparatus 1 implemented by using a DSP or a general-purpose processor must be implemented by using software, but the signal processing apparatus implemented by using an FPGA can be considered to be implemented by hardware, particularly an erasable antifuse FPGA, which permanently changes its internal circuit structure during configuration so that it can perform various signal processing tasks. Furthermore, the signal processing means may be implemented using digital circuits, without the aid of a computer program stored in RAM or on a magnetic disk.
The signal processing device 1 can generate a transmission signal with a certain bandwidth according to the detection requirement and the model control signal generation module 2 of the transducer, so that the transducer emits an ultrasonic signal with a preset bandwidth. In the process of processing the echo signal, the signal processing device 1 can select a proper filtering matching algorithm according to the specific parameters of the transducer and the bandwidth of the echo, so that the fish finder obtains a better detection result. The signal processing device 1 can store configuration information of the fish finder, and the signal processing device 1 can select parameters such as bandwidth, frequency and signal system of the transmitted signals according to the configuration information, so that the fish finder can adopt transducers of different types.
The signal processing device is connected with a data transmission interface 10 and a man-machine interaction interface 11. The detection result of the fish detector can be collected by connecting a network communication device or a data storage device to the data transmission interface. Through the human-computer interface 11, fishermen can operate the fish finder so as to detect fish schools in water.
After the fish finder is widely popularized, the acoustic data detected by the fish finder can be summarized by using the same digital back end and data format, precious data can be obtained by mining the summarized data, and beneficial value is achieved for development of ocean resources.
The fish finder of this embodiment has following beneficial effect: the adopted universal digital rear end enables the rear end of the fish finder to be adaptive to transducers of various types. In the process of upgrading the existing fish finder, only the rear-end host of the fish finder needs to be replaced, the transducer does not need to be upgraded in a dock synchronously, and the replacement cost of the transducer is saved. In addition, the digital rear end is adopted, so that a detection algorithm adopted by the fish detector can be upgraded according to requirements, the fish detector is provided with a standard data interface, underwater acoustic data can be reported or stored, and the functions of the fish detector can be expanded by externally connecting underwater acoustic processing equipment with specific functions.
The present invention has been described in detail with reference to the embodiments shown in the drawings, and those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details of the embodiments should not be construed as limitations of the invention, which are intended to be covered by the following claims.
Claims (6)
1. A fish finder, characterized by comprising: the device comprises a signal processing device, a signal generating module, a signal receiving module, a transceiving switch and a standard transducer conversion module, wherein the signal processing device is used for processing signals;
the signal generating module is electrically connected with the signal processing device and the standard transducer conversion module and is configured to output a transmitting signal to the standard transducer conversion module under the driving of the signal processing device;
the output end of the signal receiving module is electrically connected with the signal processing device, and the input end of the signal receiving module is connected with the output end of the standard transducer conversion module through the transceiving conversion switch;
the control end of the transceiving conversion switch is electrically connected with the signal processing device;
a matching transformer is arranged in the standard transducer conversion module, and a primary winding of the matching transformer is connected with a transducer interface; the transducer interface is used for connecting with a transducer.
2. The fish finder of claim 1, wherein the signal generation module comprises a high voltage power supply and a class D power amplifier;
the high-voltage power supply is connected with a power supply port of the class D power amplifier, and the input end of the class D power amplifier is connected with the signal processing device;
the output end of the class D power amplifier is connected with the standard transducer conversion module; the signal processing device generates a switching signal for driving the D-type power amplifier through Delta-Sigma modulation; the working frequency, the bandwidth and the working mode of a transmitting signal generated by the class-D power amplifier under the control of the switching signal are matched with the transducer.
3. The fish finder of claim 1, wherein the signal receiving module comprises a variable gain amplifier and an analog-to-digital converter;
the input end of the variable gain amplifier is connected with the transceiving switch; the output end of the variable gain amplifier is connected with the input end of the analog-to-digital converter;
the control end of the variable gain amplifier is connected with the signal processing device; the output end of the analog-to-digital converter is electrically connected with the signal processing device.
4. The fish finder of claim 1 wherein the inductance L of the primary winding of the matching transformerpAt the operating frequency f of the transducer to be adaptedmEquivalent capacitance value C ofpThe following relationship is satisfied:
so that the transducer to be adapted is at the operating frequency fmThe lower output impedance is in a pure resistance state with a resistance value of Rp(ii) a The number of turns of the primary winding and the secondary winding of the matching transformer is such that the output impedance of the transducer is converted into a standard resistance value R at the secondary winding of the matching transformerSThe number of turns of the primary winding and the secondary winding of the matching transformer meets the following condition:
wherein N ispFor the number of primary winding turns of said matching transformer, NsIs the number of turns of the secondary winding of the matching transformer。
5. The fish finder of claim 1, wherein the signal processing device is connected to a data transmission interface and/or a human-computer interface.
6. The fish finder of claim 1 wherein the signal processing means comprises a combination of one or more of an FPGA, a DSP, a general purpose processor, or an ASIC chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921539295.4U CN210954336U (en) | 2019-09-17 | 2019-09-17 | Fish detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921539295.4U CN210954336U (en) | 2019-09-17 | 2019-09-17 | Fish detector |
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| Publication Number | Publication Date |
|---|---|
| CN210954336U true CN210954336U (en) | 2020-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921539295.4U Active CN210954336U (en) | 2019-09-17 | 2019-09-17 | Fish detector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110579767A (en) * | 2019-09-17 | 2019-12-17 | 中国水产科学研究院渔业机械仪器研究所 | fish detector |
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- 2019-09-17 CN CN201921539295.4U patent/CN210954336U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110579767A (en) * | 2019-09-17 | 2019-12-17 | 中国水产科学研究院渔业机械仪器研究所 | fish detector |
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