CN205643698U - Ultrasonic emission circuit and range unit and car and aircraft and robot - Google Patents
Ultrasonic emission circuit and range unit and car and aircraft and robot Download PDFInfo
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- CN205643698U CN205643698U CN201620047634.7U CN201620047634U CN205643698U CN 205643698 U CN205643698 U CN 205643698U CN 201620047634 U CN201620047634 U CN 201620047634U CN 205643698 U CN205643698 U CN 205643698U
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Abstract
The utility model discloses an ultrasonic emission circuit and range unit and car and aircraft and robot, wherein, the ultrasonic emission circuit includes that power input end, pulse control module, high -voltage pulse produce the module, module, ultrasonic transducer and the module of discharging are maintain to the energy, wherein, high -voltage pulse produces the module respectively with pulse control module, power input end, the module is maintain to the energy and ultrasonic transducer is connected, module and sound wave probe connection are maintain to the energy, the module of discharging is connected with pulse control module, ultrasonic transducer respectively, high -voltage pulse produces the module and includes first inductance and the first transistor, the energy is maintain the module and is included first diode and first electric capacity. Adopt the utility model discloses the time that ultrasonic wave both ends high voltage lasts can be increased, hyperacoustic transmit power has been improved.
Description
Technical field
This utility model relates to electronic technology field, particularly relates to a kind of ultrasonic emitting circuit and range unit and automobile and aircraft and robot.
Background technology
Ultrasound wave calculate be widely used in flaw detection, thickness measuring, range finding, ultra-sonic welded, boring, the pulverizing of solid, emulsifying, degassing, dedusting, go bird nest, cleaning, sterilizing etc. apply, in general, the signal intensity of ultrasound wave is the biggest, and effect is the best.Such as, conventional reversing radar of vehicle, it is simply that using ultrasound wave to find range, radar for backing car to send the ultrasound wave of enough power, runs into, with detection, the signal that barrier reflects.Overwhelming majority high-power ultrasonics signal transmission circuit is all to use transformator relatively low voltage amplification to higher voltage the most on the market, volume of transformer is bigger, cause existing ultrasonic signal generation circuit sufficiently bulky, it is impossible to enough to meet the demand of miniaturization on market.
And along with the development of science and technology, United States Patent (USP) US4588917 proposes and a kind of uses the circuit of inductive energy storage resonance to the method obtaining high pressure, as shown in Figure 1, this circuit includes inductance L1, transistor Q1, electric capacity C1 and ultrasound probe, circuit one has three duties: in 1, the inductive energy storage stage, transistor Q1 turns on, and inductance L1 electric current rises and energy storage；2, inductance releases energy the stage, and transistor Q1 turns off, and the current direction electric capacity C1 of inductance L1 and ultrasound probe, inductance energy has been sent to electric capacity C1 and ultrasound probe, and ultrasound probe two ends obtain high pressure；3, the energy feedback stage, after inductive current is reduced to zero, electric capacity C1 and ultrasound probe both end voltage now reach the highest, and inductance electric current under the effect of two ends negative voltage continues to drop to negative current, and the energy of electric capacity C1 and ultrasound probe feeds back to input power by inductance.
This circuit utilize energy feedback, it is thus achieved that higher efficiency.But found by emulation, in any case change inductance L1 and the value of electric capacity C1, the highest energy that ultrasound probe is obtained is all certain, can not become higher, in detail shown in (a) (b) (c) (d) of simulated effect such as Figure 20, the transistor Q1 that emulation sets is with the frequency switching 8 times of 40kHz, C1=10nF, the L=58.6mH of ultrasound probe equivalent model, C=287pF, the R=362 Europe equivalent model parameter of conventional 40kHz range finding ultrasound probe (this parameter be), it is respectively 10uH at L1, 50uH, 100uH, under conditions of 200uH, it is all about 10mA that emulation obtains the maximum current of ultrasound wave, there is no the biggest change.Equally, change the value of C1, also draw same effect.To sum up, existing circuit cannot improve the transmitting power of ultrasonic signal by changing inductance L1 and electric capacity C1.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of ultrasonic emitting circuit and range unit and automobile and aircraft and robot, can add ultrasound wave two ends high voltage duration, improve the transmitting power of ultrasound wave.
For solving above technical problem, this utility model embodiment provides a kind of ultrasonic emitting circuit, including: power input, pulse control module, high-voltage pulse generation module, energy maintain module, ultrasound probe and discharge module；
Wherein, described high-voltage pulse generation module maintains module and described ultrasound probe to be connected with described pulse control module, described power input, described energy respectively；
Described energy maintains module to be connected with described ultrasound probe；
Described discharge module is connected with described pulse control module, described ultrasound probe respectively；
Described high-voltage pulse generation module includes the first inductance and the first transistor；
Described energy maintains module to include the first diode and the first electric capacity.
Further, described first electric capacity is external electric capacity or the equivalent capacity of described ultrasound probe self.
Further, described high-voltage pulse generation module maintains module and described ultrasound probe to be connected with described power input, described energy respectively, particularly as follows:
First port of described first inductance is connected with described the first transistor, and the second port of described first inductance is connected with the positive pole of described power input；
Described the first transistor is connected with the negative pole of described power input；
Described first diode is connected between the first port of described first inductance and the first port of described first electric capacity；
First port of described first electric capacity is connected with the first port of described ultrasound probe；
Second port of described first electric capacity is connected with the negative or positive electrode of described power input；
Second port of described ultrasound probe is connected with the negative or positive electrode of described power input.
Further, described high-voltage pulse generation module maintains module and described ultrasound probe to be connected with described power input, described energy respectively, particularly as follows:
First port of described first inductance is connected with described the first transistor, and the second port of described first inductance is connected with the negative pole of described power input；
Described the first transistor is connected with the positive pole of described power input；
Described first diode is connected between the first port of described first inductance and the first port of described first electric capacity；
First port of described first electric capacity is connected with the first port of described ultrasound probe；
Second port of described first electric capacity is connected with the negative or positive electrode of described power input；
Second port of described ultrasound probe is connected with the negative or positive electrode of described power input.
Further, described high-voltage pulse generation module maintains module and described ultrasound probe to be connected with described energy respectively, particularly as follows:
Described first inductance and described first Diode series, then be connected with the first port of the first transistor；
First port of described first electric capacity is connected with the first port of described the first transistor, and the second port of described first electric capacity is connected with positive pole or the negative pole of described power input；
First port of described ultrasound probe is connected with the first port of described the first transistor, and the second port of described ultrasound probe is connected with positive pole or the negative pole of described power input.
Further, this utility model provides a kind of supersonic range finder, including: signal amplification demodulator unit, differentiation element, comparing unit and the ultrasonic emitting circuit described in any of the above-described item；
Wherein, described signal amplification demodulator unit is connected with described differentiation element, ultrasonic emitting circuit respectively；
Described differentiation element is connected with described comparing unit, and described peaker is the circuit in a certain frequency band with the differential action.
Further, described signal amplification demodulator unit is connected with described ultrasonic emitting circuit, particularly as follows:
Described signal amplification demodulator unit is connected with the ultrasound probe in described ultrasonic emitting circuit；
Described ultrasound probe is the ultrasonic sensor launched and receive integration.
Further, this utility model provides a kind of automobile, including the ultrasonic emitting circuit described in any of the above-described item.
Further, this utility model provides a kind of aircraft, including the ultrasonic emitting circuit described in any of the above-described item.
Further, this utility model provides a kind of robot, including the ultrasonic emitting circuit described in any of the above-described item.
Visible, that this utility model embodiment provides ultrasonic emitting circuit, maintains module, ultrasound probe and discharge module including power input, pulse control module, high-voltage pulse generation module, energy.Wherein, high-voltage pulse generation module maintains module to be connected with energy, and energy maintains module to be connected with ultrasound probe.When the first transistor in high-voltage pulse generation module turns on, the first inductance carries out energy storage, and when the first transistor turns off, the first inductance releases energy and maintains module to pass to ultrasound probe by energy, to provide sufficiently high voltage to ultrasound probe.At this moment, after energy maintains the first electric capacity in module and ultrasound probe to set up high pressure, utilize the unidirectional general character of the first diode, the energy stoping the first electric capacity and ultrasound probe returns to input power, ensure that the high level lasting time long enough at ultrasound probe two ends, thus improve the transmitting power of ultrasound wave.Additionally, this utility model employing low cost, the transistor that volume is little, diode, inductance, electric capacity are achieved that the transmitting of high-power ultrasonics, transmitting power can be regulated by the size of adjusting inductance and transistor turns time simultaneously, not only reduce the complexity of circuit, and meet for the demand of ultrasonic applications circuit miniaturization low cost.
Accompanying drawing explanation
Fig. 1 is energy storage the structural representation of resonance circuit of prior art offer；
Fig. 2 is the structural representation of a kind of embodiment of the ultrasonic emitting circuit that this utility model provides；
Fig. 3 is the voltage oscillogram of the ultrasound probe that this utility model provides；
Fig. 4 is the current waveform figure of equivalent inductance in the ultrasound probe that this utility model provides；
Fig. 5 is the equivalent model schematic diagram of a kind of embodiment of the ultrasound probe that this utility model provides；
The structural representation of the another kind of embodiment of the ultrasonic emitting circuit that Fig. 6 this utility model provides；
Fig. 7 is the structural representation of another embodiment of the ultrasonic emitting circuit that this utility model provides；
Fig. 8 is the structural representation of another embodiment another of the ultrasonic emitting circuit that this utility model provides；
Fig. 9 to Figure 15 is the structural representation of the various embodiments of the ultrasonic emitting circuit that this utility model provides respectively；
A kind of structural representation of the embodiment of the supersonic range finder that Figure 16 provides for this utility model；
Figure 17 is the structural representation of a kind of embodiment of the signal amplification demodulator unit that this utility model provides；
Figure 18 is the structural representation of a kind of embodiment of the differentiation element that this utility model provides；
Figure 19 is the structural representation of a kind of embodiment of the comparing unit that this utility model provides；
Figure 20 is energy storage the emulation testing oscillogram of resonance circuit of prior art offer；
Figure 21 is energy storage the ultrasound probe both end voltage oscillogram of resonance circuit of prior art offer；
Figure 22 is the schematic diagram measuring blind area of the ultrasonic ranging circuit of prior art；
Figure 23 is the signal waveforms after the supersonic range finder that this utility model provides processes.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described.
Embodiment 1
See Fig. 2, be the structural representation of a kind of embodiment of the ultrasonic emitting circuit that this utility model provides.As in figure 2 it is shown, ultrasonic emitting circuit includes: power input Vin, pulse control module 11, high-voltage pulse generation module 12, energy maintain module 13, ultrasound probe 14 and discharge module 15.
Wherein, high-voltage pulse generation module 12 maintains module 13 and ultrasound probe 14 to be connected with pulse control module 11, power input Vin, energy respectively.Energy maintains module 13 to be connected with ultrasound probe 14.Discharge module 15 is connected with pulse control module 11, ultrasound probe 14 respectively.
In the present embodiment, high-voltage pulse generation module 12 includes the first inductance 122 and the first transistor 121.Energy maintains module 13 to include the first diode 131 and the first electric capacity 132.Discharge module 15 includes transistor seconds 151 and the current-limiting resistance 152 being connected in series.Discharge module 15 is parallel to the two ends of ultrasound probe 14.
In the present embodiment, pulse control module 11 is connected to the first transistor 121 of high-voltage pulse generation module 12 and the transistor seconds 151 of discharge module, when this circuit transmission ultrasound wave, pulse control module 11 sends turning on and off of the pwm pulse of certain frequency, control the first transistor 121 and transistor seconds 151.Pulse control module 11 can be made up of MCU or DSP or simple 555 oscillating circuits.
In the present embodiment, high-voltage pulse generation module 12 maintains module 13 and ultrasound probe 14 to be connected with power input Vin, energy respectively, particularly as follows: the first port of the first inductance 122 is connected with the first transistor 121, the second port of the first inductance 122 is connected with the positive pole of power input；The first transistor 121 is connected with the negative pole of power input Vin；First diode 131 is connected between the first port of the first inductance 122 and the first port of the first electric capacity 132；First port of the first electric capacity 132 is connected with the first port of ultrasound probe 14；Second port of the first electric capacity 132 is connected with the negative or positive electrode of power input Vin；Second port of ultrasound probe 14 is connected with the negative or positive electrode of power input Vin.
A kind of citing as the present embodiment, high-voltage pulse generation module 12 maintains module 13 and ultrasound probe 14 to be connected with power input Vin, energy respectively, particularly as follows: the first port of the first inductance 122 is connected with the first transistor 121, the second port of the first inductance 122 is connected with the negative pole of power input；The first transistor 121 is connected with the positive pole of power input Vin；First diode 131 is connected between the first port of the first inductance 122 and the first port of the first electric capacity 132；First port of the first electric capacity 132 is connected with the first port of ultrasound probe 14；Second port of the first electric capacity 132 is connected with the negative or positive electrode of power input Vin；Second port of ultrasound probe 14 is connected with the negative or positive electrode of power input Vin.
A kind of citing as the present embodiment, high-voltage pulse generation module 12 maintains module 13 and ultrasound probe 14 to be connected with power input Vin, energy respectively, particularly as follows: the first inductance 122 is connected with the first diode 131, then it is connected with the first port of the first transistor 121；First port of the first electric capacity 132 is connected with the first port of the first transistor 121, and the second port of the first electric capacity 132 is connected with positive pole or the negative pole of power input Vin；First port of ultrasound probe 14 is connected with the first port of the first transistor 121, and the second port of ultrasound probe 14 is connected with positive pole or the negative pole of power input Vin.In the present embodiment, ultrasonic emitting circuit is operated in four-stage repeatedly, illustrates with the connected mode of Fig. 2:
The inductive energy storage stage: the first transistor 121 is under the control of pulse control module 11, when it turns on, the pressure drop at the first inductance 122 two ends is input voltage vin, inductive current begins to ramp up, after one section of ON time ton, inductive current has reached I=ton*Vin/L, and in formula, L is the inductance value of the first inductance 122.Now inductance storage energy P=0.5*L*I^2=0.5/L* (
Ton*Vin) ^2, therefore, the energy of inductance storage is inversely proportional to its sensibility reciprocal L, to square being directly proportional of ON time.Therefore, it can be regulated the transmitting power of ultrasound probe by regulation sensibility reciprocal L and ON time.
Inductance releases energy the stage: the first transistor 121 closes has no progeny, and the energy P on the first inductance 122 passes through the first diode 131, has transferred on the first electric capacity 132 and ultrasound probe 14.So that the first electric capacity 132 and ultrasound probe 14 two ends obtain the highest voltage, the electric current of the first inductance 122 constantly reduces simultaneously, finally reduces to zero.
The energy maintenance stage: after the electric current of the first inductance 122 reduces to zero, the first diode 131 begins to shut off, and energy is stored in the first electric capacity 132 and ultrasound probe 14.In the case of first electric capacity 132 parasitic capacitance much larger than other devices, can calculate the voltage at two ends on the first electric capacity 132 and ultrasound probe 14 is V=√ (2*P/C).Due to the effect of diode, this energy will not back within inductance there, it is ensured that ultrasound probe is obtained in that enough energy are to carry out the transmitting of ultrasound wave.
Discharge regime: pulse control module 11 controls the transistor seconds 151 of discharge module 15 and turns on, and ultrasound probe both end voltage reduces to 0 again.The discharge regime in this cycle can overlap in time with the inductive energy storage stage in next cycle, i.e. this cycle, close to the when of end, obtains voltage to ultrasound wave two ends and discharges, carry out the inductive energy storage of next cycle simultaneously.
From above-mentioned 4 working stages, the present embodiment strengthens the persistent period of the high level of ultrasound probe 14 by energy maintenance module 13.Inventor finds when studying circuit of the present utility model, and from the circuit model of ultrasound probe it will be seen that the equivalent model of ultrasound probe comprises an inductance, its energy is 1/2*L*I^2.Ultrasound probe to be made obtains enough emitted energies, it is necessary to allow I become big.Due to the existence of inductance L, the ascensional range of I is relevant to V*t, and V is the voltage acting on ultrasound probe two ends, and t is the time.The circuit that United States Patent (USP) US4588917 proposes, it is problematically, when energy storage inductor L1 is less, can obtain higher voltage V at probe two ends, but action time, t was smaller；When energy storage inductor L1 is bigger, action time, t was bigger, but the voltage V that probe two ends obtain is relatively low.As shown in figure 21, Figure 21 is energy storage the ultrasound probe both end voltage oscillogram of resonance circuit of prior art offer.Two spikes are the ultrasound probe both end voltage as L1=50uH and L1=200uH respectively in figure 21, it can be seen that during voltage height, the time is short, and time long duration voltage is low.Therefore, this utility model maintains module 13 by adding energy, improves the high level lasting time of ultrasound probe, increases the ultrasonic emitting power of whole circuit.
Working effect of the present utility model can be, but not limited to see the voltage oscillogram that Fig. 3, Fig. 3 are the ultrasound probes that this utility model provides.Fig. 3 illustrates the work process in each stage.By Fig. 3 it will be seen that maintained the effect of module 13 by energy, the high voltage at ultrasound probe 14 two ends is slowly to decline, and the circuit that the persistent period proposes more than US4588917 to be grown.Fig. 4 is the current waveform figure of equivalent inductance in the ultrasound probe that this utility model provides.Fig. 4 according to identical ultrasound probe model, switching frequency that the first transistor is same and dutycycle, when the first inductance is 200uH, the simulation result of the electric current of equivalent inductance in ultrasound probe.By Fig. 4 it can be seen that, in ultrasound probe, the electric current of equivalent inductance is the highest close to 30mA, being 3 times of the circuit that US4588917 proposes, according to inductance energy P=0.5*L*I^2, the ultrasonic energy that circuit of the present utility model sends is 9 times of the circuit that US4588917 proposes.
In the present embodiment, transistor seconds 151 can simultaneously turn on the first transistor 121, i.e. to ultrasound probe 14 while the voltage that the upper cycle obtains discharges, can carry out the inductive energy storage in next cycle.
In the present embodiment, pulse control module 11 controls the first transistor 121 and transistor seconds 151 turns on and off repeatedly, ultrasound probe both end voltage just can be made to repeat periodic voltage, and ultrasound probe just can launch the ultrasound wave of sufficiently large power under periodic voltage square wave effect.
A kind of citing as the present embodiment, discharge module 15 can be realized by transistor, can also the device such as series limiting resistor, diode on transistor, even discharge module 15 is only constituted good by one or more resistance being directly parallel in ultrasound probe two ends, as long as being capable of reducing the purpose of ultrasound probe both end voltage.
As a kind of citing of the present embodiment, energy maintains the first electric capacity 132 of module 13, for external electric capacity or the equivalent capacity of ultrasound probe self.Ultrasound probe due to different model, its characteristic and equivalent model are different, the ultrasound probe of some model can be equivalent to inductance L, electric capacity C and the series connection of resistance R, and the ultrasound probe of some model is connected with an electric capacity C0, as shown in Figure 5 after can being equivalent to inductance L1, electric capacity C1 and resistance R0 series connection again.For the equivalent model on the right as shown in Figure 5, owing to ultrasound probe has been equivalent to contain an electric capacity C0, if this electric capacity C0 is the most sufficiently large, then can be directly used as described energy and maintain the first electric capacity of module；If this electric capacity C0 is insufficient to greatly, then needs additionally to add electric capacity and maintain the first electric capacity of module as energy.
As a kind of citing of the present embodiment, see the structural representation of the another kind of embodiment of the ultrasonic emitting circuit that Fig. 6, Fig. 6 this utility model provides.As shown in Figure 6, the first inductance L1 connects with the first transistor, is then attached to the both positive and negative polarity of power input Vin；First electric capacity C1 connects with the first diode D1 with after ultrasound probe parallel connection again；The first electric capacity C1, ultrasound probe and the first diode D1 after series connection, in parallel with the first inductance L1.
As a kind of citing of the present embodiment, see the structural representation that Fig. 7, Fig. 7 are another embodiments of the ultrasonic emitting circuit that this utility model provides.As it is shown in fig. 7, the first inductance L1 and the first diode D1 series connection, then connect with the first transistor Q1.First electric capacity C1 is in parallel with ultrasound probe, more in parallel with the first transistor Q1.Between whole the two poles of the earth being electrically connected to power input.Under this connection status, high-voltage pulse generation module and discharge module share described the first transistor Q.The first transistor Q1, when conducting, realizes the first inductance L1 carries out energy storage and the effect discharging the first electric capacity C1, ultrasound probe simultaneously.
As a kind of citing of the present embodiment, see the structural representation that Fig. 8, Fig. 8 are another embodiments another of the ultrasonic emitting circuit that this utility model provides.As shown in Figure 8, the first inductance L1 and the first diode D1 series connection, then connect with the first transistor Q1.First electric capacity C1 is in parallel with ultrasound probe, then with connect after the first inductance L1 and the first diode D1 in parallel.Between whole the two poles of the earth being electrically connected to power input.Under this connection status, high-voltage pulse generation module and discharge module share described the first transistor Q.The first transistor Q1, when conducting, realizes the first inductance L1 carries out energy storage and the effect discharging the first electric capacity C1, ultrasound probe simultaneously.
In order to better illustrate the structure of the present embodiment, see the structural representation that Fig. 9 to Figure 15, Fig. 9 to Figure 15 are the various embodiments of the ultrasonic emitting circuit that this utility model provides respectively, design for different situations, specific works principle is similar with the present embodiment, does not repeats them here.
In the present embodiment, ultrasonic emitting circuit of the present utility model is applicable to automobile, aircraft and robot.
Therefore, the ultrasonic emitting circuit that this utility model embodiment provides, maintain module, ultrasound probe and discharge module including power input, pulse control module, high-voltage pulse generation module, energy.Wherein, high-voltage pulse generation module maintains module to be connected with energy, and energy maintains module to be connected with ultrasound probe.When the first transistor in high-voltage pulse generation module turns on, the first inductance carries out energy storage, and when the first transistor turns off, the first inductance releases energy and maintains module to pass to ultrasound probe by energy, to provide sufficiently high voltage to ultrasound probe.At this moment, after energy maintains the first electric capacity in module and ultrasound probe to set up high pressure, utilize the unidirectional general character of the first diode, the energy stoping the first electric capacity and ultrasound probe returns to input power, ensure that the high level lasting time long enough at ultrasound probe two ends, thus improve the transmitting power of ultrasound wave.Additionally, this utility model employing low cost, the transistor that volume is little, diode, inductance, electric capacity are achieved that the transmitting of high-power ultrasonics, transmitting power can be regulated by the size of adjusting inductance and transistor turns time simultaneously, not only reduce the complexity of circuit, and meet for the demand of ultrasonic applications circuit miniaturization low cost.
Embodiment 2
Seeing the structural representation of a kind of embodiment of the supersonic range finder that Figure 16, Figure 16 provide for this utility model, this device includes: ultrasonic emitting circuit 201, signal amplification demodulator unit 202, differentiation element 203 and the comparing unit 204 described in embodiment 1.
Wherein, signal amplification demodulator unit 202 is connected with differentiation element 203, ultrasonic emitting circuit 201 respectively.Differentiation element 203 is connected with comparing unit 204.
In the present embodiment, the ultrasound probe in ultrasonic emitting circuit 201 is the ultrasonic sensor launched and receive integration.
Signal amplification demodulator unit 202 is amplified for the signal of telecommunication passing over ultrasonic sensor, filters and amplitude detection.
Differentiation element 203 is the circuit in a certain frequency band with the differential action, for the change edge signal of signal acquisition amplification demodulator unit 202 output.
Comparing unit 204, compares with a certain threshold value for the signal passing over differentiation element 203, exports corresponding level according to comparative result.
Described ultrasound probe, signal amplification demodulator unit, differentiation element, the annexation of comparing unit be: described ultrasound probe is connected to the input of described signal amplification demodulator unit, the outfan of described signal amplification demodulator unit is connected to the input of described differentiation element, and the outfan of described differentiation element is connected to the input of described comparing unit.
In order to better illustrate the supersonic range finder of the present embodiment, see the structural representation that Figure 17 to Figure 19, Figure 17 are a kind of embodiments of the signal amplification demodulator unit that this utility model provides.Figure 18 is the structural representation of a kind of embodiment of the differentiation element that this utility model provides.Figure 19 is the structural representation of a kind of embodiment of the comparing unit that this utility model provides.
After being become greatly by ultrasonic emitting circuit 201 of the present utility model due to ultrasonic emitting power, the ultrasonic reflections signal that supersonic range finder obtains is higher, therefore find range apart from farther, but for the supersonic range finder of transceiver, bigger power can cause the aftershock of higher longer time.If being directly sent to comparator after ultrasonic signal amplification demodulator with a certain threshold ratio relatively, then aftershock region is to detect barrier, and this region is referred to as blind area, sees Figure 22 in detail.Figure 22 is the schematic diagram of the ultrasonic ranging circuit measuring blind area of prior art.Due to Figure 22 and as described above understand, for the supersonic range finder of transceiver, ultrasonic emitting power is the biggest, and blind area is the biggest.
And supersonic range finder of the present utility model, between signal amplification demodulator unit 202 and the comparing unit 204 of testing circuit, insert differentiation element 203, filtering, amplify, waveform after magnitude demodulator, process through differential, then give comparator and compare.Differential is the change slope of detection signal, ultrasound wave waveform in aftershock region, when, after the ultrasonic signal that superposition reflective comes, the signal after its detection can produce an outstanding signal waveform equally, just the rate of rise of this outstanding waveform can be measured by differentiation element.Signal, after differential processes, even aftershock is interval, also can easily detect the radiation of ultrasound wave, thus substantially reduce range hole, and detailed impression figure is as shown in figure 23.
To sum up, by the combination of large power supersonic wave transmitting circuit with the ultrasonic signal testing circuit that with the addition of differentiation element, range finding distance just can be obtained remote again, the supersonic range finder that range hole is the least.
The above is preferred implementation of the present utility model; it should be pointed out that, for those skilled in the art, on the premise of without departing from this utility model principle; can also make some improvements and modifications, these improvements and modifications are also considered as protection domain of the present utility model.
Claims (10)
1. a ultrasonic emitting circuit, it is characterised in that including: power input, pulse control module, high-voltage pulse generation module, energy maintain module, ultrasound probe and discharge module；
Wherein, described high-voltage pulse generation module maintains module and described ultrasound probe to be connected with described pulse control module, described power input, described energy respectively；
Described energy maintains module to be connected with described ultrasound probe；
Described discharge module is connected with described pulse control module, described ultrasound probe respectively；
Described high-voltage pulse generation module includes the first inductance and the first transistor；
Described energy maintains module to include the first diode and the first electric capacity.
Ultrasonic emitting circuit the most according to claim 1, it is characterised in that described first electric capacity is external electric capacity or the equivalent capacity of described ultrasound probe self.
Ultrasonic emitting circuit the most according to claim 2, it is characterised in that described high-voltage pulse generation module maintains module and described ultrasound probe to be connected with described power input, described energy respectively, particularly as follows:
First port of described first inductance is connected with described the first transistor, and the second port of described first inductance is connected with the positive pole of described power input；
Described the first transistor is connected with the negative pole of described power input；
Described first diode is connected between the first port of described first inductance and the first port of described first electric capacity；
First port of described first electric capacity is connected with the first port of described ultrasound probe；
Second port of described first electric capacity is connected with the negative or positive electrode of described power input；
Second port of described ultrasound probe is connected with the negative or positive electrode of described power input.
Ultrasonic emitting circuit the most according to claim 2, it is characterised in that described high-voltage pulse generation module maintains module and described ultrasound probe to be connected with described power input, described energy respectively, particularly as follows:
First port of described first inductance is connected with described the first transistor, and the second port of described first inductance is connected with the negative pole of described power input；
Described the first transistor is connected with the positive pole of described power input；
Described first diode is connected between the first port of described first inductance and the first port of described first electric capacity；
First port of described first electric capacity is connected with the first port of described ultrasound probe；
Second port of described first electric capacity is connected with the negative or positive electrode of described power input；
Second port of described ultrasound probe is connected with the negative or positive electrode of described power input.
Ultrasonic emitting circuit the most according to claim 2, it is characterised in that described high-voltage pulse generation module maintains module and described ultrasound probe to be connected with described energy respectively, particularly as follows:
Described first inductance and described first Diode series, then be connected with the first port of the first transistor；
First port of described first electric capacity is connected with the first port of described the first transistor, and the second port of described first electric capacity is connected with positive pole or the negative pole of described power input；
First port of described ultrasound probe is connected with the first port of described the first transistor, and the second port of described ultrasound probe is connected with positive pole or the negative pole of described power input.
6. a supersonic range finder, it is characterised in that including: signal amplification demodulator unit, differentiation element, comparing unit and the ultrasonic emitting circuit as described in any one of claim 1 to 5；
Wherein, described signal amplification demodulator unit is connected with described differentiation element, ultrasonic emitting circuit respectively；
Described differentiation element is connected with described comparing unit.
Supersonic range finder the most according to claim 6, it is characterised in that described signal amplification demodulator unit is connected with described ultrasonic emitting circuit, particularly as follows:
Described signal amplification demodulator unit is connected with the ultrasound probe in described ultrasonic emitting circuit；
Described ultrasound probe is the ultrasonic sensor launched and receive integration.
8. an automobile, it is characterised in that include the ultrasonic emitting circuit described in any one of claim 1 to 5.
9. an aircraft, it is characterised in that include the ultrasonic emitting circuit described in any one of claim 1 to 5.
10. a robot, it is characterised in that include the ultrasonic emitting circuit described in any one of claim 1 to 5.
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| CN201620047634.7U CN205643698U (en) | 2016-01-18 | 2016-01-18 | Ultrasonic emission circuit and range unit and car and aircraft and robot |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445495A (en) * | 2018-04-13 | 2018-08-24 | 深圳臻迪信息技术有限公司 | Ultrasonic wave transmitting circuit and Ultrasonic ranging device |
| CN112688669A (en) * | 2020-12-11 | 2021-04-20 | 武汉航空仪表有限责任公司 | 5V-driven high-voltage pulse excitation circuit |
-
2016
- 2016-01-18 CN CN201620047634.7U patent/CN205643698U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445495A (en) * | 2018-04-13 | 2018-08-24 | 深圳臻迪信息技术有限公司 | Ultrasonic wave transmitting circuit and Ultrasonic ranging device |
| CN112688669A (en) * | 2020-12-11 | 2021-04-20 | 武汉航空仪表有限责任公司 | 5V-driven high-voltage pulse excitation circuit |
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Effective date of registration: 20170413 Address after: 200000 room No. 248, true South Road, Shanghai, Putuo District, room 147, 500 Patentee after: SHANGHAI XIAOZHUO ROBOT Co.,Ltd. Address before: 510920 Guangzhou City, Conghua District Street Street, the outskirts of the village of the team of the south side of the 20 floor, No. 25, No. Patentee before: Huang Jinbo |
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