CN209911535U - Neuron bionic circuit and signal time difference detection system - Google Patents
Neuron bionic circuit and signal time difference detection system Download PDFInfo
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- CN209911535U CN209911535U CN201822244968.5U CN201822244968U CN209911535U CN 209911535 U CN209911535 U CN 209911535U CN 201822244968 U CN201822244968 U CN 201822244968U CN 209911535 U CN209911535 U CN 209911535U
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- 239000011664 nicotinic acid Substances 0.000 title claims abstract description 64
- 238000001514 detection method Methods 0.000 title claims abstract description 23
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- 208000011726 slow pulse Diseases 0.000 claims description 25
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- 230000002238 attenuated effect Effects 0.000 claims description 8
- 241001465754 Metazoa Species 0.000 abstract description 9
- 210000000653 nervous system Anatomy 0.000 abstract description 9
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- 238000005516 engineering process Methods 0.000 description 2
- 230000002102 hyperpolarization Effects 0.000 description 2
- 230000028161 membrane depolarization Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000002336 repolarization Effects 0.000 description 2
- 230000000946 synaptic effect Effects 0.000 description 2
- 241000288673 Chiroptera Species 0.000 description 1
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- 230000002401 inhibitory effect Effects 0.000 description 1
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Abstract
The utility model provides a bionic circuit of neuron and signal time difference detecting system. In the system, a first signal receiving module receives an external first pulse; the second signal receiving module receives an external second pulse; the external first pulse and the external second pulse are analog pulse signals with the same period and time difference; the neuron bionic circuit sends neuron bionic pulses to the second differential circuit according to the external first pulses and the external second pulses; a first differentiating circuit differentiates an external first pulse and sends the first pulse to the counter; the second differentiating circuit differentiates the bionic pulse of the neuron and sends a second pulse to the counter; and the counter counts the first pulse according to the second pulse to obtain a target time difference counting sequence, and determines the target time difference according to the target time difference counting sequence. The utility model discloses imitate animal nervous system to the detection mechanism of binaural signal time difference, realize improving bionical ultrasonic positioning circuit's positioning accuracy to the small time difference's of signal rapid survey.
Description
Technical Field
The utility model belongs to the technical field of signal processing, more specifically say, relate to a bionic circuit of neuron and signal time difference detecting system.
Background
Time difference positioning is detection positioning by using time difference (time difference for short) of signals arriving at a plurality of receiving stations, is one of the most important methods in passive positioning technology, has the characteristics of higher positioning precision and more convenient cooperative work compared with other positioning methods, and is widely applied to a plurality of passive positioning systems. The time difference measurement is a key technology in time difference positioning, and the positioning precision is directly influenced by the precision of the time difference measurement. However, in the prior art, the accuracy of the time difference measurement is low, especially for small time differences.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a bionical circuit of neuron and signal time difference detecting system aims at detecting the unsafe problem to small time difference among the prior art.
The utility model discloses a first aspect of the embodiment provides a neuron bionic circuit, include: the circuit comprises a fast pulse branch, a slow pulse branch, a first balance resistor, a second balance resistor and an integrated output branch;
the first end of the slow pulse branch circuit is connected with the first input end of the neuron bionic circuit, and the second end of the slow pulse branch circuit is connected with the first end of the first balancing resistor;
the first end of the fast pulse branch circuit is connected with the second input end of the neuron bionic circuit, and the second end of the fast pulse branch circuit is connected with the first end of the second balancing resistor;
the second end of the first balancing resistor and the second end of the second balancing resistor are both connected with the first end of the integrated output branch;
and the second end of the integrated output branch circuit is connected with the output end of the neuron bionic circuit.
Optionally, the slow pulse branch includes: the circuit comprises a first capacitor, a second capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a first diode, a first triode and a first balanced power supply;
the first end of the first capacitor is connected with the first end of the slow pulse branch circuit, and the second end of the first capacitor is connected with the first end of the second capacitor; a second end of the second capacitor is respectively connected with an anode of the first diode and a first end of the first resistor;
the cathode of the first diode is connected with the base of the first triode and the first end of the second resistor; a second end of the first resistor and a second end of the second resistor are grounded;
the collector of the first triode is connected with the positive electrode of the first balanced power supply through the third resistor, the collector of the first triode is also connected with the second end of the slow pulse branch circuit, and the emitter of the first triode is grounded through the fourth resistor.
Optionally, the fast pulse branch includes: the third capacitor, the fourth capacitor, the fifth resistor, the sixth resistor, the seventh resistor, the eighth resistor, the second diode, the second triode and the second balanced power supply;
the first end of the third capacitor is connected with the first end of the fast pulse branch circuit, and the second end of the third capacitor is connected with the first end of the fourth capacitor; a second end of the fourth capacitor is respectively connected with an anode of the second diode and a first end of the fifth resistor;
the cathode of the second diode is connected with the base of the second triode and the first end of the sixth resistor; a second end of the fifth resistor and a second end of the sixth resistor are grounded;
and the collector of the second triode is connected with the anode of the second balanced power supply through the seventh resistor, the emitter of the second triode is connected with the second end of the fast pulse branch circuit, and the emitter of the second triode is grounded through the eighth resistor.
Optionally, the integrated output branch includes: a fifth capacitor, a sixth capacitor and a ninth resistor;
a first end of the fifth capacitor is connected with the first end of the integrated output branch, and a second end of the fifth capacitor is respectively connected with the second end of the integrated output branch, the first end of the sixth capacitor and the first end of the ninth resistor;
a second terminal of the sixth capacitor and a second terminal of the ninth resistor are grounded.
The utility model discloses a second is sent out and is provided a signal time difference detecting system, include: the neuron bionic circuit comprises a first signal receiving module, a second signal receiving module, a first differential circuit, a second differential circuit, a counter and any one of the neuron bionic circuits;
the first signal receiving module is connected with a first input end of the neuron bionic circuit and the first differential circuit and used for receiving an external first pulse;
the second signal receiving module is connected with a second input end of the neuron bionic circuit and used for receiving an external second pulse; the external first pulse and the external second pulse are signals with the same period, and a time difference exists between the two pulses;
the output end of the neuron bionic circuit is connected with the second differential circuit and is used for sending neuron bionic pulses to the second differential circuit according to the external first pulses and the external second pulses;
the first differentiating circuit is connected with a clock end of the counter and used for differentiating the external first pulse and sending the first pulse to the counter;
the second differential circuit is connected with the reset end of the counter and used for differentiating the neuron bionic pulse and sending a second pulse to the counter;
and the counter is used for counting the first pulse according to the second pulse to obtain a target time difference counting sequence, and determining the target time difference between the external first pulse and the external second pulse according to the target time difference counting sequence.
Optionally, the first signal receiving module includes: a first receiver for receiving the external first pulse, a first amplifying/attenuating unit and a first shaping unit;
the first amplifying/attenuating unit is configured to amplify/attenuate the external first pulse received by the first receiver;
the first shaping unit is used for shaping the amplified/attenuated external first pulse and sending the shaped external first pulse to the neuron bionic circuit and the first differential circuit.
Optionally, the second signal receiving module includes: a second receiver for receiving the external second pulse, a second amplifying/attenuating unit and a second shaping unit;
the second amplifying/attenuating unit is configured to amplify/attenuate the external second pulse received by the second receiver;
and the second shaping unit is used for shaping the amplified/attenuated external second pulse and sending the shaped external second pulse to the neuron bionic circuit.
Optionally, the signal time difference detection system further includes: the amplifying circuit is used for amplifying the neuron bionic pulse;
the neuron bionic circuit is connected with the second differential circuit through the amplifying circuit.
The embodiment of the utility model provides an in signal time difference detecting system lie in with prior art's beneficial effect: the first signal receiving module receives an external first pulse, and the second signal receiving module receives an external second pulse, wherein the external first pulse and the external second pulse are analog pulse signals which are periodic signals and have time difference, and the characteristics of binaural receiving signals of an animal nervous system are simulated; then the neuron bionic circuit sends the neuron bionic pulses to a second differential circuit according to the external first pulses and the external second pulses; a first differentiating circuit differentiates an external first pulse and sends the first pulse to the counter; the second differentiating circuit differentiates the bionic pulse of the neuron and sends a second pulse to the counter; the counter counts the first pulse according to the second pulse to obtain a target time difference counting sequence, and finally determines the target time difference according to the target time difference counting sequence, thereby simulating the detection mechanism of the animal nervous system to the time difference of the binaural signals, realizing the rapid measurement of the tiny time difference of the signals and improving the positioning precision of the bionic ultrasonic positioning circuit.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a circuit diagram of a neuron bionic circuit provided by an embodiment of the present invention;
fig. 2 is a schematic diagram of pulses at an output end of a fast pulse branch according to an embodiment of the present invention;
fig. 3 is a schematic diagram of pulses at an output end of a slow pulse branch according to an embodiment of the present invention;
fig. 4 is a waveform diagram of an output pulse of a neuron bionic circuit provided by an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a signal time difference detection system according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another signal time difference detection system according to an embodiment of the present invention;
fig. 7 is a schematic diagram illustrating the comparison between the pulse output by the first differentiating circuit and the pulse output by the first differentiating circuit according to the embodiment of the present invention;
fig. 8 is a schematic signal flow diagram of a signal time difference detection system according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a corresponding relationship between a historical time difference counting sequence and a time difference provided by the embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical solution of the present invention, the following description is made by using specific examples.
Referring to fig. 1, in one embodiment, a neuron biomimetic circuit 300 may comprise: a fast pulse branch 320, a slow pulse branch 310, a first balancing resistor Rx, a second balancing resistor Ry, and an integrated output branch 330.
A first end of the slow pulse branch 310 is connected to a first input end of the neuron bionic circuit 300, and a second end of the slow pulse branch 310 is connected to a first end of a first balancing resistor Rx; the first end of the fast pulse branch 320 is connected with the second input end of the neuron bionic circuit 300, and the second end of the fast pulse branch 320 is connected with the first end of the second balance resistor Ry; the second end of the first balancing resistor Rx and the second end of the second balancing resistor Ry are both connected to the first end of the integrated output branch 330; the second end of the integrated output branch 330 is connected to the output end of the neuron biomimetic circuit 300.
In the above neuron biomimetic circuit 300, the fast pulse branch circuit 320 is used to simulate the depolarization and repolarization processes in the generation of action pulses by biological neurons, and outputs a forward pulse according to an external pulse, as shown in fig. 2; the slow pulse branch 310 is used for simulating the process of generating hyperpolarization in action pulses by biological neurons, and outputting negative pulses according to external pulses, as shown in fig. 3; the inhibitory synaptic current signal enters the integrated output branch 330 through the first balancing resistor Rx, the excitatory synaptic current signal enters the integrated output branch 330 through the second balancing resistor Ry, and the integrated output branch 330 outputs the neuron bionic pulse.
Alternatively, referring to fig. 1, the slow pulse branch 310 may include: the circuit comprises a first capacitor C1, a second capacitor C2, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first diode D1, a first triode Q1 and a first balanced power supply V1.
A first end of the first capacitor C1 is connected to a first end of the slow pulse branch 310, and a second end of the first capacitor C1 is connected to a first end of the second capacitor C2; a second terminal of the second capacitor C2 is connected to an anode of the first diode D1 and a first terminal of the first resistor R1, respectively.
The cathode of the first diode D1 is connected with the base of the first triode Q1 and the first end of the second resistor R2; the second terminal of the first resistor R1 and the second terminal of the second resistor R2 are grounded.
The collector of the first transistor Q1 is connected to the positive terminal of the first balanced power supply V1 through a third resistor R3, the collector of the first transistor Q1 is further connected to the second terminal of the slow pulse branch 310, and the emitter of the first transistor Q1 is grounded through the fourth resistor R4.
Alternatively, referring to fig. 1, the fast pulse branch 320 may include: the circuit comprises a third capacitor C3, a fourth capacitor C4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a second diode D2, a second triode Q2 and a second balanced power supply V2.
A first end of the third capacitor C3 is connected to the first end of the fast pulse branch 320, and a second end of the third capacitor C3 is connected to the first end of the fourth capacitor C4; a second terminal of the fourth capacitor C4 is connected to an anode of the second diode D2 and a first terminal of the fifth resistor R5, respectively. The cathode of the second diode D2 is connected to the base of the second transistor Q2 and the first end of the sixth resistor R6; a second terminal of the fifth resistor R5 and a second terminal of the sixth resistor R6 are coupled to ground.
The collector of the second transistor Q2 is connected to the positive terminal of the second balanced power supply V2 through a seventh resistor R7, the emitter of the second transistor Q2 is connected to the second terminal of the fast pulse branch 320, and the emitter of the second transistor Q2 is further grounded through an eighth resistor R8.
In one embodiment, referring to fig. 1, the integrated output branch 330 may include: a fifth capacitor C5, a sixth capacitor C6 and a ninth resistor R9.
A first end of the fifth capacitor C5 is connected to the first end of the integrated output branch 330, and a second end of the fifth capacitor C5 is connected to the second end of the integrated output branch 330, the first end of the sixth capacitor C6, and the first end of the ninth resistor R9, respectively; the second terminal of the sixth capacitor C6 and the second terminal of the ninth resistor R9 are grounded.
The neuron bionic circuit is a double-input and single-output circuit and comprises a fast pulse branch circuit 320, a slow pulse branch circuit 310, a balance resistor and an integrated output branch circuit 330, wherein the fast pulse branch circuit 320 is used for simulating the depolarization and repolarization processes of a biological neuron generating action pulses, the slow pulse branch circuit 310 is used for simulating the hyperpolarization processes of the biological neuron generating action pulses, the leakage resistances of the fast pulse branch circuit 320 and the slow pulse branch circuit 310 are respectively R3 and R5, and the resistance of R5 is more than 10 times of the resistance of R3.
Taking the fast pulse branch 320 as an example to illustrate the working principle of the branch, firstly, the square pulse R is decoupled by the capacitor C6 to charge the capacitor C1, and the rectifier diode D1 realizes the rectification of the capacitor output signal. When the output voltage of the rectifier diode D1 is greater than the turn-on voltage of the transistor Q2, the transistor Q2 is turned on, the collector of the transistor Q2 rapidly amplifies the current flowing into the base, the current flowing into the emitter resistor R9 also rapidly increases, the emitter voltage rapidly increases, the capacitor C1 rapidly discharges through the drain resistor R3, and when the voltage of the capacitor C1 is less than the turn-on voltage of the transistor Q2, the transistor Q2 is turned off, thereby generating a rapid forward pulse, as shown in fig. 2. Compared with the fast pulse branch, the slow pulse branch takes the collector terminal of the triode Q1 as output, when the triode Q1 is conducted, the terminal voltage of the emitter electrode rises rapidly, the voltage of the collector terminal drops rapidly, otherwise, the voltage is reversed, and therefore negative pulse is generated; since the branch leakage resistor R5 has a larger resistance value than the fast pulse branch leakage resistor R3, the transistor Q1 is on for a longer time, and the capacitor C2 is discharging for a longer time, the negative pulse rises more slowly, as shown in fig. 3. R11 and R10 are balancing resistors for balancing the output voltages of the two triodes, so that the output voltage range is maintained at the same order of magnitude, and the integrated output branch is convenient for integrating the outputs of the fast pulse branch and the slow pulse branch, thereby outputting an action pulse waveform, as shown in fig. 4.
Based on above-mentioned neuron bionic circuit, the embodiment of the utility model provides a still provide a signal time difference detecting system. Referring to fig. 5, the signal time difference detection system may include: the device comprises a first signal receiving module 100, a second signal receiving module 200, a neuron bionic circuit 300, a first differentiating circuit 400, a second differentiating circuit 500 and a counter 600.
The first signal receiving module 100 is connected to a first input terminal of the neuron bionic circuit 300 and the first differentiating circuit 400, the second signal receiving module 200 is connected to a second input terminal of the neuron bionic circuit 300, an output terminal of the neuron bionic circuit 300 is connected to the second differentiating circuit 500, the first differentiating circuit 400 is connected to a clock terminal CLK of the counter 600, and the second differentiating circuit 500 is connected to a reset terminal CLR of the counter 600.
The first signal receiving module 100 is configured to receive an external first pulse; the second signal receiving module 200 is configured to receive an external second pulse; the external first pulse and the external second pulse are signals with the same period, and a time difference exists between the two pulses; the neuron bionic circuit 300 is configured to send a neuron bionic pulse to the second differentiating circuit 500 according to the external first pulse and the external second pulse; the first differentiating circuit 400 is configured to differentiate the external first pulse and send the first pulse to the counter 600; the second differentiating circuit 500 is configured to differentiate the neuron bionic pulse and send a second pulse to the counter 600; the counter 600 is configured to count the first pulse according to the second pulse to obtain a target time difference count sequence, and a detection person may determine a target time difference between the external first pulse and the external second pulse according to the target time difference count sequence.
In nature, certain biological sonar systems (e.g., bats, etc.) are capable of transmitting ultrasonic waves, receiving and analyzing their echoes to determine the distance, position, speed, size, shape, etc. of a target, and in response thereto, predation and obstacle avoidance. One of the cores of the animal for realizing the high-precision sound source positioning function is that the auditory nervous system rapidly and sensitively encodes the binaural time difference signal, and then determines the signal time difference through the encoded neurons, so as to judge the distance, position, speed, size, shape and the like of a target, and the accuracy and speed are high. Therefore, in the embodiment, the neuron bionic circuit 300 is used for simulating the detection mechanism of the animal nervous system to the binaural signal time difference, so as to realize the rapid measurement of the small time difference of the signal.
Illustratively, referring to fig. 5 and 8, the first signal receiving module 100 receives a square wave signal L, the square wave signal L is input into the neuron biomimetic circuit 300 and the first differentiating circuit 400, and the neuron biomimetic circuit 300 sends a neuron biomimetic pulse δ to the second differentiating circuit 500 according to the square wave signal L. The square wave signal L is converted into a first pulse L 'of the same period by the first differentiating circuit 400, the neuron bionic pulse δ is converted into a second pulse δ' by the second differentiating circuit 500, and the temporal relationship between the first pulse L 'and the second pulse δ' is shown in fig. 7.
Then, the clock end CLK of the counter 600 counts and latches when receiving the rising edge of the first pulse L ', the count value is cleared when the reset end CLR receives the rising edge of the second pulse δ', the clock end CLK of the counter 600 counts again and latches when receiving the rising edge of the first pulse L ', and the process is circulated until the second pulse δ' is transmitted, so that a target time difference count sequence is obtained, the target time difference count sequence is not interfered by signals of other circuits, the count result is related to the pulse frequency, the count result is stable, finally, a detector performs one-to-one matching according to the target time difference count sequence and the historical time difference count sequence, and determines the target time difference according to the matching. The higher the frequency of the square wave signal L, the higher the counting frequency of the counter 600, and the larger the dimension of the sequence, the higher the frequency measurement accuracy and precision.
The historical time difference counting sequence is a sequence obtained by passing a signal with known time difference through a signal time difference detection system, and is in a corresponding relation with the known time difference as shown in fig. 9. And after obtaining a target time difference counting sequence according to the external first pulse and the external second pulse, matching the target time difference counting sequence with a plurality of historical time difference counting sequences one by one, and determining the target time difference according to a matching result, namely finding a sequence which is the same as the target time difference counting sequence in the historical time difference counting sequences, namely determining the target time difference.
In the signal time difference detection system, the first signal receiving module 100 receives an external first pulse, the second signal receiving module 200 receives an external second pulse, and the external first pulse and the external second pulse are periodic signals and have time difference, so that the characteristics of binaural receiving signals of an animal nervous system are simulated; then the neuron bionic circuit 300 sends the neuron bionic pulses to the second differentiating circuit 500 according to the external first pulses and the external second pulses; the first differentiating circuit 400 differentiates the external first pulse and transmits the first pulse to the counter 600; the second differentiating circuit 500 differentiates the neuron biomimetic pulse and sends a second pulse to the counter 600; the counter 600 counts the first pulse according to the second pulse to obtain a target time difference counting sequence, and finally determines the target time difference according to the target time difference counting sequence, thereby simulating the detection mechanism of the animal nervous system on the binaural signal time difference, realizing the rapid measurement of the tiny time difference of the signal, improving the positioning precision of the bionic ultrasonic positioning circuit, and the system of the embodiment has low cost and low power consumption.
In one embodiment, referring to fig. 6, the first signal receiving module 100 includes: a first receiver Y1, a first amplification/attenuation unit 110 and a first shaping unit 120. The first receiver Y1, the first amplifying/attenuating unit 110, and the first shaping unit 120 are connected in this order.
The first receiver Y1 is configured to receive the external first pulse, and the first amplifying/attenuating unit 110 is configured to amplify/attenuate the external first pulse received by the first receiver Y1. The first shaping unit 120 is configured to shape the amplified/attenuated external first pulse and send the shaped external first pulse to the neuron biomimetic circuit 300 and the first differentiating circuit 400.
Optionally, the first amplifying/attenuating unit 110 may be an amplifying circuit/attenuating circuit, and amplify or attenuate the external first pulse, and convert the external first pulse into a suitable voltage range for transmission. The amplifying circuit/attenuating circuit may be implemented by a comparator, an operational amplifier, a diode, an inverter, and the like.
Alternatively, the first shaping unit 120 may be implemented by a schmitt trigger, which shapes the amplified/attenuated external first pulse into a square wave pulse.
In one embodiment, referring to fig. 6, the second signal receiving module 200 includes: a second receiver Y2, a second amplifying/attenuating unit 210 and a second shaping unit 220. The second receiver Y2, the second amplifying/attenuating unit 210, and the second shaping unit 220 are connected in sequence.
The second receiver Y2 is configured to receive the external second pulse, and the second amplifying/attenuating unit 210 is configured to amplify/attenuate the external second pulse received by the second receiver Y2. The second shaping unit 220 is configured to shape the amplified/attenuated external second pulse and send the shaped external second pulse to the neuron biomimetic circuit 300.
Optionally, the second amplifying/attenuating unit 210 may be an amplifying circuit/attenuating circuit, and amplify or attenuate the external second pulse into a suitable voltage range for transmission. The amplifying circuit/attenuating circuit may be implemented by a comparator, an operational amplifier, a diode, an inverter, and the like.
Alternatively, the second shaping unit 220 may be implemented by a schmitt trigger, which shapes the amplified/attenuated external second pulse into a square wave pulse.
In one embodiment, referring to fig. 6, the signal time difference detection system may further include: an amplifier circuit 800. The neuron bionic circuit 300 is connected with the second differentiating circuit 500 through the amplifying circuit, and the amplifying circuit 800 amplifies the neuron bionic pulse and outputs the amplified neuron bionic pulse to the second differentiating circuit 500. The amplification circuit 800 can reduce noise and interference of the neuron bionic pulse and improve the accuracy of time difference measurement.
In the above embodiment, the signal time difference detection system mainly receives an external first pulse through the first signal receiving module 100, and the second signal receiving module 200 receives an external second pulse, where the external first pulse and the external second pulse are periodic signals and have a time difference, so as to simulate characteristics of a binaural received signal of an animal nervous system; then the neuron bionic circuit 300 sends the neuron bionic pulses to the second differentiating circuit 500 according to the external first pulses and the external second pulses; the first differentiating circuit 400 differentiates the external first pulse and transmits the first pulse to the counter 600; the second differentiating circuit 500 differentiates the neuron biomimetic pulse and sends a second pulse to the counter 600; the counter 600 counts the first pulse according to the second pulse to obtain a target time difference counting sequence, and finally 700 determines the target time difference according to the target time difference counting sequence, thereby simulating the detection mechanism of the animal nervous system on the binaural signal time difference, realizing the rapid measurement of the tiny time difference of the signal, improving the positioning precision of the bionic ultrasonic positioning circuit, and the system of the embodiment has low cost and low power consumption.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A neuron biomimetic circuit, comprising: the circuit comprises a fast pulse branch, a slow pulse branch, a first balance resistor, a second balance resistor and an integrated output branch;
the first end of the slow pulse branch circuit is connected with the first input end of the neuron bionic circuit, and the second end of the slow pulse branch circuit is connected with the first end of the first balancing resistor;
the first end of the fast pulse branch circuit is connected with the second input end of the neuron bionic circuit, and the second end of the fast pulse branch circuit is connected with the first end of the second balancing resistor;
the second end of the first balancing resistor and the second end of the second balancing resistor are both connected with the first end of the integrated output branch;
and the second end of the integrated output branch circuit is connected with the output end of the neuron bionic circuit.
2. The neuron biomimetic circuit of claim 1, wherein the slow pulse branch comprises: the circuit comprises a first capacitor, a second capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a first diode, a first triode and a first balanced power supply;
the first end of the first capacitor is connected with the first end of the slow pulse branch circuit, and the second end of the first capacitor is connected with the first end of the second capacitor; a second end of the second capacitor is respectively connected with an anode of the first diode and a first end of the first resistor;
the cathode of the first diode is connected with the base of the first triode and the first end of the second resistor; a second end of the first resistor and a second end of the second resistor are grounded;
the collector of the first triode is connected with the positive electrode of the first balanced power supply through the third resistor, the collector of the first triode is also connected with the second end of the slow pulse branch circuit, and the emitter of the first triode is grounded through the fourth resistor.
3. The neuron biomimetic circuit of claim 1, wherein the fast pulse leg comprises: the third capacitor, the fourth capacitor, the fifth resistor, the sixth resistor, the seventh resistor, the eighth resistor, the second diode, the second triode and the second balanced power supply;
the first end of the third capacitor is connected with the first end of the fast pulse branch circuit, and the second end of the third capacitor is connected with the first end of the fourth capacitor; a second end of the fourth capacitor is respectively connected with an anode of the second diode and a first end of the fifth resistor;
the cathode of the second diode is connected with the base of the second triode and the first end of the sixth resistor; a second end of the fifth resistor and a second end of the sixth resistor are grounded;
and the collector of the second triode is connected with the anode of the second balanced power supply through the seventh resistor, the emitter of the second triode is connected with the second end of the fast pulse branch circuit, and the emitter of the second triode is grounded through the eighth resistor.
4. The neuron biomimetic circuit of claim 1, wherein the integrated output branch comprises: a fifth capacitor, a sixth capacitor and a ninth resistor;
a first end of the fifth capacitor is connected with the first end of the integrated output branch, and a second end of the fifth capacitor is respectively connected with the second end of the integrated output branch, the first end of the sixth capacitor and the first end of the ninth resistor;
a second terminal of the sixth capacitor and a second terminal of the ninth resistor are grounded.
5. A signal time difference detection system, comprising: a first signal receiving module, a second signal receiving module, a first differentiating circuit, a second differentiating circuit, a counter, and the neuron biomimetic circuit as claimed in any one of claims 1 to 4;
the first signal receiving module is connected with a first input end of the neuron bionic circuit and the first differential circuit and used for receiving an external first pulse;
the second signal receiving module is connected with a second input end of the neuron bionic circuit and used for receiving an external second pulse; the external first pulse and the external second pulse are signals with the same period, and a time difference exists between the two pulses;
the output end of the neuron bionic circuit is connected with the second differential circuit and is used for sending neuron bionic pulses to the second differential circuit according to the external first pulses and the external second pulses;
the first differentiating circuit is connected with a clock end of the counter and used for differentiating the external first pulse and sending the first pulse to the counter;
the second differential circuit is connected with the reset end of the counter and used for differentiating the neuron bionic pulse and sending a second pulse to the counter;
and the counter is used for counting the first pulse according to the second pulse to obtain a target time difference counting sequence, and determining the target time difference between the external first pulse and the external second pulse according to the target time difference counting sequence.
6. The signal time difference detection system of claim 5, wherein the first signal receiving module comprises: a first receiver for receiving the external first pulse, a first amplifying/attenuating unit and a first shaping unit;
the first amplifying/attenuating unit is configured to amplify/attenuate the external first pulse received by the first receiver;
the first shaping unit is used for shaping the amplified/attenuated external first pulse and sending the shaped external first pulse to the neuron bionic circuit and the first differential circuit.
7. The signal time difference detection system of claim 5, wherein the second signal receiving module comprises: a second receiver for receiving the external second pulse, a second amplifying/attenuating unit and a second shaping unit;
the second amplifying/attenuating unit is configured to amplify/attenuate the external second pulse received by the second receiver;
and the second shaping unit is used for shaping the amplified/attenuated external second pulse and sending the shaped external second pulse to the neuron bionic circuit.
8. The signal time difference detection system according to claim 5 or 6, characterized in that the signal time difference detection system further comprises: the amplifying circuit is used for amplifying the neuron bionic pulse;
the neuron bionic circuit is connected with the second differential circuit through the amplifying circuit.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109709511A (en) * | 2018-12-29 | 2019-05-03 | 中国人民解放军陆军工程大学 | The bionical circuit of neuron and signal time difference detection system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109709511A (en) * | 2018-12-29 | 2019-05-03 | 中国人民解放军陆军工程大学 | The bionical circuit of neuron and signal time difference detection system |
| CN109709511B (en) * | 2018-12-29 | 2024-03-01 | 中国人民解放军陆军工程大学 | Neuron bionic circuit and signal time difference detection system |
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