Acoustic transponder and response method thereof

Abstract

The invention discloses an acoustic transponder and a response method thereof. The acoustic transponder comprises a transducer, a pre-amplification processing module, a frequency selection module, a detection module, a processor, a voltage comparison module and a transmitting module, and the processor respectively records signal receiving time when a plurality of digital signals are received under the condition that the processor judges that the plurality of digital signals are preset digital signals; an acoustic transponder group number is obtained through analysis according to the multiple signal receiving times, whether the acoustic transponder group number obtained through analysis is the acoustic transponder group number or not is judged, and if yes, a driving signal is transmitted to a transmitting module; if not, the acoustic transponder is controlled to be in a low-power-consumption mode; the transmitting module amplifies the driving signal and sends the driving signal to the transducer, and the transducer sends a response signal to the upper computer according to the amplified driving signal. The acoustic transponder is in a working state only when the wake-up signal is received, and automatically enters a low-power-consumption mode after the response is completed, so that the standby time of the acoustic transponder is prolonged.

Description

Technical Field

[0001] The present application relates to the field of offshore oil seismic exploration, and in particular to an acoustic transponder and a response method thereof. Background Art

[0002] In recent years, with the rapid development of offshore seismic exploration, the exploration workload has also increased year by year. In offshore seismic exploration, when construction workers place the geophone, they are affected by wind, waves, tides, and currents, which will cause the position of the geophone to move during the process of being put into the seawater. This will cause the position of the geophone on the sea to be offset from the position measured by GPS on the sea surface and will cause time errors to be introduced during seismic exploration. Acoustic transponders are now mainly used to locate underwater geophones to improve the accuracy of seismic exploration. In actual use, acoustic transponders are required to have the characteristics of small size, long range, wide bandwidth, long standby time and high reliability. Since acoustic transponders are usually used in deep water conditions, they are required to have the characteristics of high transmission efficiency, high receiving sensitivity, low power consumption and long standby time.

[0003] Traditional acoustic transponder signal detection uses energy detection, spectrum detection, and cyclic statistics detection methods. The above acoustic transponder circuits have the following two disadvantages: 1) Due to the complex encoding method, a high-performance and high-power digital signal processor is required, which leads to a high circuit load of the entire acoustic transponder and an increase in the overall power consumption of the circuit. 2) The traditional transponder circuit requires the duty circuit to be in working state at all times. Although real-time wake-up is guaranteed, the acoustic transponder is always in working state, the acoustic transponder consumes a lot of power, and the standby time of the acoustic transponder is short. Summary of the invention

[0004] In view of the above problems, the present application is proposed to provide an acoustic transponder and a response method thereof that overcome the above problems or at least partially solve the above problems.

[0005] According to one aspect of the present application, an acoustic transponder is provided, comprising: a transducer, a preamplifier processing module, a frequency selection module, a detection module, a processor, a voltage comparison module, and a transmission module;

[0006] The transducer is used to receive the wake-up signal and at least one coded signal sent successively by the host computer, output the wake-up signal and at least one coded signal to the preamplifier processing module, and send a response signal to the host computer according to the amplified driving signal;

[0007] A preamplifier processing module, used to perform preamplifier processing on the wake-up signal and at least one coded signal respectively, and output the processed wake-up signal and the processed at least one coded signal to the frequency selection module;

[0008] A frequency selection module, used to perform preset frequency selection processing on the processed wake-up signal and the processed at least one coded signal, respectively, to obtain corresponding target frequency signals, and output a plurality of target frequency signals to the detection module, wherein the frequencies corresponding to the plurality of target frequency signals are different;

[0009] A detection module, used to perform detection processing on the multiple target frequency signals respectively, obtain envelope signals corresponding to the target frequency signals, and output the multiple envelope signals to the voltage comparison module respectively;

[0010] A voltage comparison module, used to compare the multiple envelope signals with a preset reference voltage respectively, and output multiple digital signals to the processor according to the comparison results;

[0011] A processor, configured to, when it is determined that the multiple digital signals are all preset digital signals, respectively record the signal reception time of the multiple digital signals, parse the multiple signal reception times to obtain the acoustic transponder group number, and determine whether the acoustic transponder group number obtained by parsing is the acoustic transponder group number of the present acoustic transponder, and if so, transmit a driving signal to the transmitting module; if not, control the acoustic transponder to enter a low power consumption mode;

[0012] The transmitting module is used to amplify the driving signal and send it to the transducer.

[0013] Furthermore, the processor is further used to: respectively calculate the signal interval duration between the signal reception time of the first digital signal and the signal reception time of other digital signals;

[0014] The acoustic transponder group number is obtained by parsing the signal interval duration and the preset address coding method.

[0015] Furthermore, if the number of signals sent by the host computer is N, the number of signal interval durations is N-1, and the signal interval durations are numbered 1 to N-1 in the order of calculation, and the signal interval durations include: the first signal interval duration - the N-1th signal interval duration;

[0016] The processor is further used to: substitute the calculated N-1 signal interval durations into the following address coding formula to obtain the acoustic transponder group number through parsing:

[0017] First signal interval duration = base_time1 + J*K;

[0018] Second signal interval length = base_time2 + J*K; ...

[0019] The N-1th signal interval duration = base_time(N-1)+J*K;

[0020] Among them, base_time1>0, base_time2>base_time1+J*K, ..., base_time(N-1)>base_time(N-2)+J*K, when the signal interval time length is an odd number, the value of J is the modulo of the acoustic transponder group number and M; when the signal interval time length is an even number, the value of J is the quotient of the acoustic transponder group number and M, and M is the group number factor.

[0021] Further, the frequency selection module includes: a first frequency selection unit and a plurality of second frequency selection units, the first frequency selection unit is connected to the preamplifier processing module, and the plurality of second frequency selection units are respectively connected to the first frequency selection unit and the processor;

[0022] The first frequency selection unit is used to perform a first frequency selection process on the processed wake-up signal output by the preamplifier processing module;

[0023] The processor is further configured to: when it is determined that the digital signal is a preset digital signal each time, according to a predefined power-on sequence of the second frequency selection units, send a frequency switching signal to the corresponding second frequency selection unit to control the power-on operation of the second frequency selection unit;

[0024] The first frequency selection unit and the powered-on second frequency selection unit are used to jointly perform a second frequency selection process on at least one coded signal outputted by the pre-amplifier processing module after being processed.

[0025] Further, the first frequency selection unit includes: a first transistor, a first inductor, a first capacitor, a second capacitor, a third capacitor, a first resistor, a second resistor, a third resistor, and a fourth resistor;

[0026] The base of the first transistor is connected to the preamplifier processing module; the collector of the first transistor, the first end of the first inductor, the first end of the first capacitor, the first end of the second capacitor, and the first end of the third capacitor are connected to the detection module; the second end of the first inductor, the second end of the first capacitor, the second end of the second capacitor, and the second end of the third capacitor are connected to the first end of the fourth resistor; the second end of the fourth resistor is connected to the power module; the emitter of the first transistor is connected to the first end of the first resistor, the third end of the first resistor, and the first end of the second resistor; the second end of the first resistor is connected to the second end of the second resistor and the first end of the third resistor; the second end of the third resistor is connected to the power module.

[0027] Further, the second frequency selection unit includes: a second triode, a third triode, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a fifth resistor, and a sixth resistor;

[0028] The base of the second triode and the first end of the fourth capacitor are grounded; the collector of the second triode is connected to the second end of the fourth capacitor and the first end of the fifth resistor; the second end of the fifth resistor is connected to the power supply module; the emitter of the second triode and the collector of the second triode are connected to the emitter of the third triode; the base of the third triode is connected to the first end of the sixth resistor, the second end of the sixth resistor is connected to the processor, the collector of the third triode is connected to the first end of the fifth capacitor, the first end of the sixth capacitor, and the first end of the seventh capacitor; the second end of the fifth capacitor, the second end of the sixth capacitor, and the second end of the seventh capacitor are connected to the detection module.

[0029] Further, the detection module includes: a fourth triode, an eighth capacitor, a ninth capacitor, a seventh resistor, an eighth resistor, and a ninth resistor;

[0030] The base of the fourth triode is connected to the frequency selection module; the collector of the fourth triode and the first end of the seventh resistor are connected to the power supply module; the emitter of the fourth triode is connected to the second end of the seventh resistor, the first end of the eighth capacitor, the first end of the eighth resistor, and the first end of the ninth resistor; the second end of the eighth capacitor, the second end of the eighth resistor, and the second end of the ninth capacitor are grounded; the first end of the ninth capacitor and the second end of the ninth resistor are connected to the voltage comparison module.

[0031] Further, the voltage comparison module includes: a tenth capacitor and a first comparator;

[0032] The first end of the tenth capacitor and the fifth end of the first comparator are connected to the power supply module, the second end of the first comparator is connected to the detection module, the third end of the first comparator is connected to the preset reference voltage, the fourth end of the first comparator is grounded, the first end of the first comparator is connected to the processor, and the second end of the tenth capacitor is grounded.

[0033] Furthermore, the acoustic transponder also includes: a power supply module, which is used to supply power to the preamplifier processing module, the frequency selection module, the detection module, the processor, and the voltage comparison module respectively.

[0034] According to another aspect of the present application, a response method of an acoustic responder is provided, comprising:

[0035] S1, acoustic transponder power-on initialization;

[0036] S2, the processor starts the function watch function, and the acoustic transponder enters the low power consumption mode;

[0037] S3, receiving a wake-up signal and at least one coded signal sent successively by the host computer, and recording the signal receiving time of each signal;

[0038] S4, obtaining the acoustic transponder group number according to the multiple signal reception time resolution;

[0039] S5, judging whether the acoustic transponder group number obtained by parsing is the acoustic transponder group number of the present acoustic transponder; if so, jumping to S6; if not, jumping to S2;

[0040] S6, sending a response signal to the host computer.

[0041] According to the solution provided in the embodiment of the present application, it is in working state only when receiving the wake-up signal, and automatically enters low power consumption mode after completing the response. It not only builds a hardware mode to realize signal response, but also redesigns and optimizes a first frequency selection unit, multiple second frequency selection units, and detection circuits according to the encoding method, so as to realize the expansion of detection frequency. It ensures the lowest power consumption of hardware circuit and the most optimized software strategy, greatly reduces power consumption and prolongs the standby time of acoustic transponder.

[0042] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0044] Figure 1 A structural block diagram of an acoustic transponder according to an embodiment of the present application is shown;

[0045] Figure 2 A circuit diagram of some modules of an acoustic transponder is shown;

[0046] Figure 3 shows a circuit schematic diagram of a signal normalization unit;

[0047] Figure 4 It is the address encoding method of the acoustic transponder group number in (1,23);

[0048] Figure 5 is the address encoding method of the acoustic transponder group number in (24, 212);

[0049] Figure 6 A schematic flow chart of a response method of an acoustic transponder according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0050] The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0051] Figure 1 FIG. 1 shows a block diagram of an acoustic transponder according to an embodiment of the present application. Figure 1 As shown, the acoustic transponder includes: a transducer 101, a preamplifier processing module 102, a frequency selection module 103, a detection module 104, a processor 105, a voltage comparison module 106, and a transmitting module 107;

[0052] The transducer 101 is used to receive the wake-up signal and at least one coded signal sent successively by the host computer, output the wake-up signal and at least one coded signal to the preamplifier processing module, and send a response signal to the host computer according to the amplified driving signal.

[0053] In order to effectively reduce the function of the acoustic transponder and extend the standby time of the acoustic transponder, the acoustic transponder in this embodiment enters a low power consumption mode after power-on initialization, that is, the acoustic transponder operates in a low power consumption mode when no response is required.

[0054] The transducer has receiving and transmitting functions, and can receive multiple signals sent successively by the upper computer. The upper computer sends multiple signals successively according to the preset coding protocol. The interval duration of sending multiple signals is pre-specified in the preset coding protocol, wherein the multiple signals include: a wake-up signal and at least one coding signal. The wake-up signal is used to wake up the acoustic transponder, so that the acoustic transponder switches from a low power consumption mode to a normal mode. The number of coding signals is related to the group in which the acoustic transponder is located in the preset coding protocol. If the group in which the acoustic transponder is located is the first group, then the number of coding signals is 1. If the group in which the acoustic transponder is located is the lth group, then the number of coding signals is l, and l≥2.

[0055] Each time the transducer receives a signal sent by the host computer, it outputs the signal to the preamplifier processing module for processing. The transducer needs to output the received signal to the preamplifier processing module multiple times.

[0056] After receiving the amplified driving signal output by the transmitting module, the transducer sends a response signal to the host computer. The response signal is a response water acoustic pulse generated by the transducer.

[0057] The preamplifier processing module 102 is used to perform preamplifier processing on the wake-up signal and at least one coded signal respectively, and output the processed wake-up signal and the processed at least one coded signal to the frequency selection module.

[0058] Since the acoustic transponder is placed in seawater, there may be noise signals. That is to say, although the preamplifier processing module receives the wake-up signal or coding signal sent by the transducer every time, it may also transmit the noise signal to the preamplifier processing module at the same time. In order to more accurately identify the signal sent by the host computer, the preamplifier processing module performs preamplifier processing on the wake-up signal and at least one coding signal respectively, and outputs the processed wake-up signal and at least one processed coding signal to the frequency selection module.

[0059] Among them, the preamplifier processing mainly includes: differential amplification processing, filtering processing and signal normalization processing. In combination with the above processing process, the preamplifier processing module may include: differential amplification unit, bandpass filtering unit, signal normalization unit;

[0060] The differential amplifier unit is used to amplify the difference between the input signals, which refers to the difference between the wake-up signal or the coding signal and the noise signal;

[0061] The bandpass filtering unit may be a bandpass filter which allows signals within a specific frequency range to pass through while suppressing signals outside the range.

[0062] The signal normalization unit mainly regulates the signal circuit into high and low level square waves. Figure 3 is the circuit diagram of the signal normalization unit, as shown in Figure 3 As shown, the signal normalization unit includes: a tenth resistor R9, an eleventh resistor R12, a twelfth resistor R13, a thirteenth resistor R7, an eleventh capacitor C24, a twelfth capacitor C25, a thirteenth capacitor C14, a second comparator U6A, and a third comparator U6B. The first end of the resistor R9 is connected to the power module, and the power module provides a 5V voltage. The second end of the resistor R9 and the first end of the resistor R12 are connected to the third end of U6A. The second end of the resistor R12, the first end of the capacitor C24, the first end of the resistor R13, and the first end of the capacitor C25 are connected to the fourth end of U6A and the sixth end of U6B. The second end of the capacitor C24 and the second end of the resistor R13 are grounded. The second end of the capacitor C25 and the fifth end of U6B are connected to the power module, and the power module provides a 5V voltage. The first end of the resistor R7 and the second end of U6A are connected to the bandpass filtering unit. The second end of the resistor R7 is connected to the first end of U6A, and the first end of U6A is connected to the frequency selection module. The eighth terminal of U6A and the first terminal of capacitor C14 are connected to a power module, the power module provides a 5V voltage, and the second terminal of capacitor C14 is grounded.

[0063] The follower circuit is used as input to increase the load, and R7 is the feedback resistor of the follower circuit. R9 = R12, then the input voltage of the third terminal of the second comparator U6 is basically 2.5V, and the center level is pulled up to 2.5 to 5V, instead of 0 to 5V, so the current change becomes smaller, reducing the power consumption of the load signal change. Using a wide voltage amplifier, the voltage is from 5V U6-8 to U6-4, which increases the level of pin 4 (GND), and the device is still within the voltage operating range, which can further reduce power consumption.

[0064] The frequency selection module 103 is used to perform preset frequency selection processing on the processed wake-up signal and at least one processed coded signal to obtain corresponding target frequency signals, and output multiple target frequency signals to the detection module respectively, wherein the frequencies corresponding to the multiple target frequency signals are different.

[0065] The frequency selection module mainly selects the target frequency signal. Each time the preamplifier processing module outputs a signal to the frequency selection module, it may output the noise signal to the frequency selection module together. Therefore, the frequency selection module needs to perform preset frequency selection processing to select the target frequency signal. That is to say, when the wake-up signal sent by the preamplifier processing module is received, the noise signal is also received at the same time, and the wake-up signal needs to be selected. The frequencies of the wake-up signal and the noise signal are different, so the wake-up signal can be selected, and the target frequency signal is the wake-up signal; each time the coded signal is received, the noise signal is also received at the same time, and the coded signal needs to be selected. The frequencies of the coded signal and the noise signal are different, so the wake-up signal can be selected, and the target frequency signal is the wake-up signal. The frequencies of the wake-up signal and each coded signal are different.

[0066] In an optional implementation, the frequency selection module includes: a first frequency selection unit and a plurality of second frequency selection units, the first frequency selection unit is connected to the preamplifier processing module, and the plurality of second frequency selection units are respectively connected to the first frequency selection unit and the processor;

[0067] The first frequency selection unit is used to perform a first frequency selection process on the processed wake-up signal output by the pre-amplifier processing module; when the first frequency selection process is performed on the wake-up signal, only the first frequency selection unit is used.

[0068] The processor is further configured to: when it is determined that the digital signal is a preset digital signal each time, according to a predefined power-on sequence of the second frequency selection units, send a frequency switching signal to the corresponding second frequency selection unit to control the power-on operation of the second frequency selection unit;

[0069] The first frequency selection unit and the powered-on second frequency selection unit are used to jointly perform a second frequency selection process on at least one coded signal processed and output by the preamplifier processing module. That is, after the wake-up signal is processed, the second frequency selection unit is powered on to make it work, and the first frequency selection unit and the powered-on second frequency selection unit jointly complete the second frequency selection process.

[0070] Wherein, the first frequency selection unit includes: a first transistor, a first inductor, a first capacitor, a second capacitor, a third capacitor, a first resistor, a second resistor, a third resistor, and a fourth resistor;

[0071] The base of the first transistor is connected to the preamplifier processing module; the collector of the first transistor, the first end of the first inductor, the first end of the first capacitor, the first end of the second capacitor, and the first end of the third capacitor are connected to the detection module; the second end of the first inductor, the second end of the first capacitor, the second end of the second capacitor, and the second end of the third capacitor are connected to the first end of the fourth resistor; the second end of the fourth resistor is connected to the power module; the emitter of the first transistor is connected to the first end of the first resistor, the third end of the first resistor, and the first end of the second resistor; the second end of the first resistor is connected to the second end of the second resistor and the first end of the third resistor; the second end of the third resistor is connected to the power module.

[0072] The second frequency selection unit includes: a second triode, a third triode, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a fifth resistor, and a sixth resistor;

[0073] The base of the second triode and the first end of the fourth capacitor are grounded; the collector of the second triode is connected to the second end of the fourth capacitor and the first end of the fifth resistor; the second end of the fifth resistor is connected to the power module; the emitter of the second triode and the collector of the second triode are connected to the emitter of the third triode; the base of the third triode is connected to the first end of the sixth resistor, the second end of the sixth resistor is connected to the processor, the collector of the third triode is connected to the first end of the fifth capacitor, the first end of the sixth capacitor, and the first end of the seventh capacitor; the second end of the fifth capacitor, the second end of the sixth capacitor, and the second end of the seventh capacitor are connected to the detection module. In this optional implementation, the number of the second frequency selection units can be expanded, and the number of the second frequency selection units corresponds to the number of numbered signals actually to be sent.

[0074] The acoustic transponder optimizes the frequency selection circuit. Only one first frequency selection unit and two second frequency selection units are needed to achieve three-frequency expansion. Similarly, to achieve four-frequency expansion, three second frequency selection units are needed. Only one detection circuit is needed to expand the address capacity infinitely in software and hardware, and the complexity is low. The overall circuit design only requires one processor hardware foundation.

[0075] Figure 2 A circuit diagram of some modules of an acoustic transponder is shown, Figure 2 As shown, the acoustic transponder includes a first frequency selection unit and two second frequency selection units, wherein the first frequency selection unit includes: transistor Q10, inductor L3, capacitor C30, capacitor C28, capacitor C36, resistor R33, resistor R36, resistor R25, resistor R27;

[0076] The base of the transistor Q10 is connected to the preamplifier processing module, specifically, to the first end of U6A in the signal normalization processing unit; the collector of the transistor Q10, the first end of the inductor L3, the first end of the capacitor C30, the first end of the capacitor C28, and the first end of the capacitor C36 are connected to the detection module; the second end of the inductor L3, the second end of the capacitor C30, the second end of the capacitor C28, and the second end of the capacitor C36 are connected to the first end of the resistor R27; the second end of the resistor R27 is connected to the power module, and the power module provides a 5V voltage; the emitter of the transistor Q10 is connected to the first end of the resistor R33, the third end of the resistor R33, and the first end of the resistor R36; the second end of the resistor R33 is connected to the second end of the resistor R36 and the first end of the resistor R25; the second end of the resistor R25 is connected to the power module.

[0077] The frequency of the wake-up signal is 36.8khz. In the first frequency selection unit, the pull-up circuits R33 and R25 are used to increase the DC component, and then L3, C30, C28, and C36 are used to form an LC frequency selection circuit. By setting appropriate values ​​of L3, C30, C28, and C36, the frequency selection frequency can be accurately set to 36.8khz and the frequency selection signal can be output.

[0078] Among them, the frequency

[0079] Whether the second frequency selection unit is turned on and working depends on whether the processor sends a frequency cutting signal. When the processor does not send a frequency cutting signal, any second frequency selection unit is not turned on, that is, it is in low power consumption mode. The processor sends a frequency cutting signal each time it determines that the digital signal is a preset digital signal, and the control of which second frequency selection unit is powered on and working is a predefined power-on sequence of the second frequency selection units. Therefore, according to the predefined power-on sequence of the second frequency selection units, a frequency cutting signal is sent to the corresponding second frequency selection unit to control the power-on of the second frequency selection unit; only one second frequency selection unit is turned on and working at a time.

[0080] The second frequency selection unit includes: transistor Q11, transistor Q13, capacitor C39, capacitor C11, capacitor C32, capacitor C46, ​​resistor R29, and resistor R1; wherein the base of the transistor Q11 and the first end of the capacitor C39 are grounded; the collector of the transistor Q11 is connected to the second end of the capacitor C39 and the first end of the resistor R29; the second end of the resistor R29 is connected to the power module; the emitter of the transistor Q11 and the collector of the transistor Q11 are connected to the emitter of the transistor Q13; the base of the transistor Q13 is connected to the first end of the resistor R1, the second end of the resistor R1 is connected to the processor, the collector of the transistor Q13 is connected to the first end of the capacitor C11, the first end of the capacitor C32, and the first end of the capacitor C46; the second end of the capacitor C11, the second end of the capacitor C32, and the second end of the capacitor C46 are connected to the detection module.

[0081] When ON1 is at a high level, transistors Q13 and Q11 are turned on, and the second ends of C11, C32, and C46 are grounded, and thus connected in parallel to the first frequency selection unit L3, C30, C28, and C36. By setting appropriate resistance values, capacitance values, and inductance values, the first frequency selection unit and the second frequency selection unit can accurately select 35.2khz. After completing the frequency selection, the second frequency selection unit enters a low power consumption mode.

[0082] That is, the frequency of f1 is 35.2khz.

[0083] Transistor Q12, transistor Q9, capacitor C37, capacitor C42, capacitor C31, capacitor C41, resistor R28, resistor R15; wherein the base of transistor Q12 and the first end of capacitor C37 are grounded; the collector of transistor Q12 is connected to the second end of capacitor C37 and the first end of resistor R28; the second end of resistor R28 is connected to the power module; the emitter of transistor Q12 and the collector of transistor Q12 are connected to the emitter of transistor Q9; the base of transistor Q9 is connected to the first end of resistor R15, the second end of resistor R15 is connected to the processor, the collector of transistor Q9 is connected to the first end of capacitor C42, the first end of capacitor C31, and the first end of capacitor C41; the second end of capacitor C42, the second end of capacitor C31, and the second end of capacitor C41 are connected to the detection module;

[0084] When ON2 is at a high level, transistors Q12 and Q9 are turned on, the second ends of C42, C31 and C41 are grounded, and C42, C31 and C41 are connected in parallel to the first frequency selection unit L3, C30, C28 and C36. By setting appropriate resistance values, capacitance values ​​and inductance values, the first frequency selection unit and the second frequency selection unit can accurately select 33.7 khz. After completing the frequency selection, the second frequency selection unit enters a low power consumption mode.

[0085] That is to say, the frequency of f2 is 33.7khz.

[0086] The detection module 104 is used to perform detection processing on the multiple target signals respectively to obtain envelope signals corresponding to each target signal, and output the multiple envelope signals to the voltage comparison module respectively.

[0087] Specifically, combined Figure 2 The detection module includes: a fourth transistor Q8, an eighth capacitor C34, a ninth capacitor C35, a seventh resistor R21, an eighth resistor R20, and a ninth resistor R17; a two-stage RC low-pass filter circuit is formed through the PN junction of R21 and the transistor Q8 and the subsequent C34, R20, R17, and C35 to form a detection circuit.

[0088] The base of the fourth triode Q8 is connected to the frequency selection module, specifically, the base of the fourth triode Q8 is connected to the collector of the triode Q10, the first end of the inductor L3, the first end of the capacitor C30, the first end of the capacitor C28, and the first end of the capacitor C36; the collector of the fourth triode Q8 and the first end of the seventh resistor R21 are connected to the power supply module; the emitter of the fourth triode Q8 is connected to the second end of the seventh resistor R21, the first end of the eighth capacitor C34, the first end of the eighth resistor R20, and the first end of the ninth resistor R17; the second end of the eighth capacitor C34, the second end of the eighth resistor R20, and the second end of the ninth capacitor C35 are grounded; the first end of the ninth capacitor C35 and the second end of the ninth resistor R17 are connected to the voltage comparison module.

[0089] The voltage comparison module 105 is used to compare the multiple envelope signals with a preset reference voltage respectively, and output multiple digital signals to the processor according to the comparison results.

[0090] Combination Figure 2 The voltage comparison module includes: a tenth capacitor C40 and a first comparator U8A; the first end of the tenth capacitor C40 and the fifth end of the first comparator U8A are connected to the power supply module, the second end of the first comparator U8A is connected to the detection module, the third end of the first comparator U8A is connected to a preset reference voltage, the fourth end of the first comparator U8A is grounded, the first end of the first comparator U8A is connected to the processor, and the second end of the tenth capacitor is grounded.

[0091] U8A is a voltage comparator, which compares the envelope signal with the reference voltage and outputs a corresponding digital signal, and sends the digital signal to the processor for processing.

[0092] Processor 106 is used to, when it is determined that the multiple digital signals are all preset digital signals, respectively record the signal reception time of the multiple digital signals, parse the multiple signal reception times to obtain the acoustic transponder group number, and determine whether the acoustic transponder group number obtained by parsing is the acoustic transponder group number of this acoustic transponder, and if so, transmit a driving signal to the transmitting module; if not, control the acoustic transponder to enter a low power consumption mode.

[0093] The processor will judge the digital signal output by the voltage comparison module to determine whether it is a preset digital signal, for example, whether it is 1. When it is determined that the multiple digital signals are all preset digital signals, the signal receiving time of the received digital signals will be recorded respectively. The processor will receive digital signals multiple times, and each time it is determined that the digital signals are all preset digital signals, the signal receiving time of the received digital signals will be recorded. After no digital signals are received subsequently, the processor can parse the acoustic transponder group number according to the multiple signal receiving times, and then determine whether the acoustic transponder group number obtained by parsing is the acoustic transponder group number of the current acoustic transponder. If so, a driving signal is transmitted to the transmitting module; if not, the acoustic transponder is controlled to enter the low power consumption mode.

[0094] The processor is further used to: respectively calculate the signal interval duration between the signal receiving time of the first digital signal and the signal receiving time of other digital signals; and parse and obtain the acoustic transponder group number according to the signal interval duration and the preset address coding method.

[0095] If the number of signals sent by the host computer is N, the number of signal interval durations is N-1, and the signal interval durations are numbered from 1 to N-1 in the order of calculation, and the signal interval durations include: the first signal interval duration - the N-1th signal interval duration;

[0096] The processor is further used to: substitute the calculated N-1 signal interval durations into the following address coding formula to obtain the acoustic transponder group number through parsing:

[0097] First signal interval duration = base_time1 + J*K;

[0098] Second signal interval length = base_time2 + J*K; ...

[0099] The N-1th signal interval duration = base_time(N-1)+J*K;

[0100] Among them, base_time1>0, base_time2>base_time1+J*K, ..., base_time(N-1)>base_time(N-2)+J*K, when the signal interval time length is an odd number, the value of J is the modulo of the acoustic transponder group number and M; when the signal interval time length is an even number, the value of J is the quotient of the acoustic transponder group number and M, and M is the group number factor.

[0101] For ease of understanding, the following is an expanded explanation:

[0102] Assuming the group number factor is M, the coded address groups are (1, M+2), (M+3, M*10+2), (M*10+3, M*20+2)...M*(i-1)*10+2), i≥2.

[0103] If the acoustic transponder group number is in the range of (1, M+2), two signals are encoded. temp1 is the acoustic transponder group number modulo M:

[0104] Signal interval duration A = base_time1 + temp1 * K (unit: ms)

[0105] The value range of A is (base_time1, base_time1+temp1*K)

[0106] Among them, base_time1>0, the wake-up signal frequency is 36.8Khz, and the encoding signal frequency is 35.2khz.

[0107] If the acoustic transponder group number is in the range of (M+3,M*10+2), three signals are encoded. temp1 is the modulus of the acoustic transponder group number with respect to M, and temp2 is the quotient of the acoustic transponder group number with respect to M:

[0108] Signal interval duration A = base_time1 + temp1 * K (unit: ms);

[0109] The value range of A is (base_time1, base_time1+temp1*K)

[0110] Where base_time1>0, signal interval duration B=base_time2+temp2*K (unit: ms);

[0111] The value range of B is (base_time2, base_time2+temp2*K), base_time2 is greater than base_time1+temp1*K

[0112] Among them, the wake-up signal frequency is 36.8Khz, the first coding signal frequency is 35.2khz, and the second coding signal frequency is 33.7KHz.

[0113] If the acoustic transponder group number is in the range of (M*10+3,M*20+2), four signals are encoded. temp1 is the modulus of the acoustic transponder group number with respect to M, and temp2 is the quotient of the acoustic transponder group number with respect to M.

[0114] Signal interval duration A = base_time1 + temp1 * K (unit: ms);

[0115] The value range of A is (base_time1, base_time1+temp1*K), where base_time1>0 signal interval duration B=base_time2+temp2*K (unit: ms);

[0116] The value range of B is (base_time2, base_time2+temp2*K), where base_time2 is greater than base_time1+temp1*K.

[0117] Signal interval duration C = base_time3 + temp1*K (unit: ms);

[0118] The value range of C is (base_time3, base_time3+temp1*K), where basetime3 is greater than base_time2+temp2*K.

[0119] And so on, I will not go into details below.

[0120] The following is an example. If M = 21, then the groups are (1, 23), (24, 212)

[0121] If the acoustic transponder group number is in the range of (1, 23), two signals are encoded, and the signal interval duration A is:

[0122] Signal interval duration A = 70 + temp1 * 328 / fcpuMS; (70, 270), where the wake-up signal frequency is 36.8Khz and the encoding signal frequency is 35.2khz. Figure 4 As shown;

[0123] If the acoustic transponder group number is (24, 212), three signals are encoded.

[0124] Signal interval duration A = 70 + temp1 * 328 / fcpuMS; (70, 270)

[0125] Signal interval duration B = 309 + temp2 * 328 / fcpuMS; (309, 409)

[0126] Here 309>270, where the wake-up signal frequency is 36.8Khz, the first coding signal frequency is 35.2khz, and the second coding signal frequency is 33.7KHz. Figure 5 shown.

[0127] temp1 is the remainder of the acoustic transponder group number with respect to 21, and temp2 is the quotient of the acoustic transponder group number with respect to 21.

[0128] Therefore, after calculating the duration of each signal interval, the processor can use the corresponding address coding formula to calculate the acoustic transponder group number.

[0129] The transmitting module 107 is used to amplify the driving signal and send it to the transducer.

[0130] The driving signal output by the processor is a low-power square wave signal. The transmitting module converts the low-power driving signal into a high-power driving signal and sends it to the transducer.

[0131] In an optional implementation, the acoustic transponder further includes: a power supply module, which is used to supply power to the preamplifier processing module, the frequency selection module, the detection module, the processor, and the voltage comparison module respectively.

[0132] In summary, the acoustic transponder provided in this embodiment is in working state only when receiving a wake-up signal, and automatically enters low power consumption mode after completing the response. It not only builds a hardware mode for realizing signal response, but also redesigns and optimizes a first frequency selection unit, multiple second frequency selection units, and a detection circuit according to the encoding method, so as to realize the expansion of the detection frequency. It ensures the lowest power consumption of the hardware circuit and the most optimized software strategy, greatly reduces power consumption, and prolongs the standby time of the acoustic transponder.

[0133] Figure 6 FIG. 2 is a flow chart showing a response method of an acoustic transponder according to another embodiment of the present application. Figure 6 As shown, the method comprises the following steps:

[0134] Step S601, the acoustic transponder is powered on and initialized;

[0135] Step S602, the processor starts the function on-duty function, and the acoustic transponder enters a low power consumption mode;

[0136] Step S603, receiving a wake-up signal and at least one coded signal sent successively by the host computer, and recording the signal receiving time of each signal;

[0137] Step S604, obtaining the acoustic transponder group number according to the multiple signal reception times;

[0138] Step S605, determining whether the acoustic transponder group number obtained by analysis is the acoustic transponder group number of the present acoustic transponder; if so, executing step S606; if not, executing step S602.

[0139] Step S606, sending a response signal to the host computer, and jumping to step S602.

[0140] Optionally, obtaining the acoustic transponder group number according to the multiple signal reception time parsing further includes:

[0141] respectively calculating the signal interval duration between the signal reception time of the wake-up signal and the signal reception time of at least one coded signal;

[0142] The acoustic transponder group number is obtained by parsing the signal interval duration and the preset address coding method.

[0143] Optionally, if the number of signals sent by the host computer is N, the number of signal interval durations is N-1, and the signal interval durations are numbered 1 to N-1 in the order of calculation, and the signal interval durations include: the first signal interval duration - the N-1th signal interval duration;

[0144] Obtaining the acoustic transponder group number by parsing according to the signal interval duration and the preset address coding method further includes: substituting the calculated N-1 signal interval durations into the following address coding formula to obtain the acoustic transponder group number by parsing:

[0145] First signal interval duration = base_time1 + J*K;

[0146] Second signal interval length = base_time2 + J*K; ...

[0147] The N-1th signal interval duration = base_time(N-1)+J*K;

[0148] Among them, base_time1>0, base_time2>base_time1+J*K, ..., base_time(N-1)>base_time(N-2)+J*K, when the signal interval time length is an odd number, the value of J is the modulo of the acoustic transponder group number and M; when the signal interval time length is an even number, the value of J is the quotient of the acoustic transponder group number and M, and M is the group number factor.

[0149] To sum up, according to the method provided in this embodiment, the complexity of address resolution is reduced, so that the acoustic transponder enters the working state only when it receives a wake-up signal, and is in low power consumption mode at other times, which greatly reduces power consumption and extends the standby time of the acoustic transponder.

[0150] The algorithm or display provided here are not inherently related to any specific computer, virtual system or other equipment. Various general systems can also be used together with the teaching based on this. According to the above description, it is obvious to construct the structure required for this type of system. In addition, the present application embodiment is not directed to any specific programming language yet. It should be understood that various programming languages ​​can be utilized to realize the content of the present application described here, and the above description of specific languages ​​is to disclose the best mode of implementation of the present application.

[0151] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0152] Similarly, it should be understood that in order to streamline the present application and help understand one or more of the various inventive aspects, in the above description of the exemplary embodiments of the present application, the various features of the embodiments of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. However, the disclosed method should not be interpreted as reflecting the following intention: the claimed application requires more features than the features clearly stated in each claim. More specifically, as reflected in the claims below, the inventive aspects are less than all the features of the single embodiment disclosed above. Therefore, the claims following the specific embodiment are hereby expressly incorporated into the specific embodiment, wherein each claim itself serves as a separate embodiment of the present application.

[0153] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and in addition they may be divided into a plurality of submodules or subunits or subcomponents. Except that at least some of such features and / or processes or units are mutually exclusive, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this manner may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0154] In addition, those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims below, any one of the claimed embodiments may be used in any combination.

[0155] The various component embodiments of the present application can be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It should be understood by those skilled in the art that a microprocessor or digital signal processor (DSP) can be used in practice to implement some or all functions of some or all components according to the embodiments of the present application. The application can also be implemented as a device or apparatus program (e.g., computer program and computer program product) for executing a part or all of the methods described herein. Such a program implementing the present application can be stored on a computer-readable medium, or can have the form of one or more signals. Such a signal can be downloaded from an Internet website, or provided on a carrier signal, or provided in any other form.

[0156] It should be noted that the above embodiments illustrate the present application rather than limit the present application, and that those skilled in the art may design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets shall not be constructed as a limitation on the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of multiple such elements. The present application may be implemented by means of hardware including several different elements and by means of a suitably programmed computer. In a unit claim that lists several devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words may be interpreted as names. The steps in the above embodiments, unless otherwise specified, should not be understood as limitations on the order of execution.

Claims

1. An acoustic transponder, comprising: Transducer, preamplifier processing module, frequency selection module, detection module, processor, voltage comparison module, transmission module; The transducer is used to receive the wake-up signal and at least one coded signal sent successively by the host computer, output the wake-up signal and at least one coded signal to the preamplifier processing module, and send a response signal to the host computer according to the amplified driving signal; A preamplifier processing module, used to perform preamplifier processing on the wake-up signal and at least one coded signal respectively, and output the processed wake-up signal and the processed at least one coded signal to the frequency selection module; A frequency selection module, used to perform preset frequency selection processing on the processed wake-up signal and the processed at least one coded signal, respectively, to obtain corresponding target frequency signals, and output a plurality of target frequency signals to the detection module, wherein the frequencies corresponding to the plurality of target frequency signals are different; A detection module, used to perform detection processing on the multiple target frequency signals respectively, obtain envelope signals corresponding to the target frequency signals, and output the multiple envelope signals to the voltage comparison module respectively; A voltage comparison module, used to compare the multiple envelope signals with a preset reference voltage respectively, and output multiple digital signals to the processor according to the comparison results; A processor, configured to, when it is determined that the multiple digital signals are all preset digital signals, respectively record the signal reception time of the multiple digital signals, parse the multiple signal reception times to obtain the acoustic transponder group number, and determine whether the acoustic transponder group number obtained by parsing is the acoustic transponder group number of the present acoustic transponder, and if so, transmit a driving signal to the transmitting module; if not, control the acoustic transponder to enter a low power consumption mode; The transmitting module is used to amplify the driving signal and send it to the transducer.

2. The acoustic transponder according to claim 1, wherein: The processor is further used to: respectively calculate the signal interval duration between the signal receiving time of the first digital signal and the signal receiving time of other digital signals; The acoustic transponder group number is obtained by parsing the signal interval duration and the preset address coding method.

3. The acoustic transponder according to claim 2, wherein: If the number of signals sent by the host computer is N, the number of signal interval durations is N-1, and the signal interval durations are numbered from 1 to N-1 in the order of calculation. The signal interval durations include: the first signal interval duration - the N-1th signal interval duration; The processor is further used to: substitute the calculated N-1 signal interval durations into the following address coding formula to obtain the acoustic transponder group number through parsing: First signal interval duration = base_time1 + J*K; Second signal interval length = base_time2 + J*K; ... The N-1th signal interval duration = base_time(N-1)+J*K; Among them, base_time1>0, base_time2>base_time1+J*K, ..., base_time(N-1)>base_time(N-2)+J*K, when the signal interval time length is an odd number, the value of J is the modulo of the acoustic transponder group number and M; when the signal interval time length is an even number, the value of J is the quotient of the acoustic transponder group number and M, and M is the group number factor.

4. The acoustic transponder according to any one of claims 1 to 3, wherein: The frequency selection module includes: a first frequency selection unit and a plurality of second frequency selection units, the first frequency selection unit is connected to the preamplifier processing module, and the plurality of second frequency selection units are respectively connected to the first frequency selection unit and the processor; The first frequency selection unit is used to perform a first frequency selection process on the processed wake-up signal output by the preamplifier processing module; The processor is further configured to: when it is determined that the digital signal is a preset digital signal each time, according to a predefined power-on sequence of the second frequency selection units, send a frequency switching signal to the corresponding second frequency selection unit to control the power-on operation of the second frequency selection unit; The first frequency selection unit and the powered-on second frequency selection unit are used to jointly perform a second frequency selection process on at least one coded signal outputted by the pre-amplifier processing module after being processed.

5. The acoustic transponder according to claim 4, wherein: The first frequency selection unit includes: a first transistor, a first inductor, a first capacitor, a second capacitor, a third capacitor, a first resistor, a second resistor, a third resistor, and a fourth resistor; The base of the first transistor is connected to the preamplifier processing module; the collector of the first transistor, the first end of the first inductor, the first end of the first capacitor, the first end of the second capacitor, and the first end of the third capacitor are connected to the detection module; the second end of the first inductor, the second end of the first capacitor, the second end of the second capacitor, and the second end of the third capacitor are connected to the first end of the fourth resistor; the second end of the fourth resistor is connected to the power module; the emitter of the first transistor is connected to the first end of the first resistor, the third end of the first resistor, and the first end of the second resistor; the second end of the first resistor is connected to the second end of the second resistor and the first end of the third resistor; the second end of the third resistor is connected to the power module.

6. The acoustic transponder according to claim 5, wherein: The second frequency selection unit includes: a second triode, a third triode, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a fifth resistor, and a sixth resistor; The base of the second triode and the first end of the fourth capacitor are grounded; the collector of the second triode is connected to the second end of the fourth capacitor and the first end of the fifth resistor; the second end of the fifth resistor is connected to the power supply module; the emitter of the second triode and the collector of the second triode are connected to the emitter of the third triode; the base of the third triode is connected to the first end of the sixth resistor, the second end of the sixth resistor is connected to the processor, the collector of the third triode is connected to the first end of the fifth capacitor, the first end of the sixth capacitor, and the first end of the seventh capacitor; the second end of the fifth capacitor, the second end of the sixth capacitor, and the second end of the seventh capacitor are connected to the detection module.

7. The acoustic transponder according to any one of claims 1 to 3, wherein: The detection module includes: a fourth triode, an eighth capacitor, a ninth capacitor, a seventh resistor, an eighth resistor, and a ninth resistor; The base of the fourth triode is connected to the frequency selection module; the collector of the fourth triode and the first end of the seventh resistor are connected to the power supply module; the emitter of the fourth triode is connected to the second end of the seventh resistor, the first end of the eighth capacitor, the first end of the eighth resistor, and the first end of the ninth resistor; the second end of the eighth capacitor, the second end of the eighth resistor, and the second end of the ninth capacitor are grounded; the first end of the ninth capacitor and the second end of the ninth resistor are connected to the voltage comparison module.

8. The acoustic transponder according to any one of claims 1 to 3, wherein: The voltage comparison module includes: a tenth capacitor and a first comparator; The first end of the tenth capacitor and the fifth end of the first comparator are connected to the power supply module, the second end of the first comparator is connected to the detection module, the third end of the first comparator is connected to the preset reference voltage, the fourth end of the first comparator is grounded, the first end of the first comparator is connected to the processor, and the second end of the tenth capacitor is grounded.

9. The acoustic transponder according to any one of claims 1 to 3, wherein: The acoustic transponder further comprises: a power supply module, which is used to supply power to the preamplifier processing module, the frequency selection module, the detection module, the processor, and the voltage comparison module respectively.

10. A response method of an acoustic transponder, comprising: S1, acoustic transponder power-on initialization; S2, the processor starts the function watch function, and the acoustic transponder enters the low power consumption mode; S3, receiving a wake-up signal and at least one coded signal sent successively by the host computer, and recording the signal receiving time of each signal; S4, obtaining the acoustic transponder group number according to the multiple signal reception time resolution; S5, judging whether the acoustic transponder group number obtained by parsing is the acoustic transponder group number of the present acoustic transponder; if so, jumping to S6; if not, jumping to S2; S6, sending a response signal to the host computer.

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