CN2175825Y - Sonic water gauge - Google Patents
Sonic water gauge Download PDFInfo
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- CN2175825Y CN2175825Y CN93221736U CN93221736U CN2175825Y CN 2175825 Y CN2175825 Y CN 2175825Y CN 93221736 U CN93221736 U CN 93221736U CN 93221736 U CN93221736 U CN 93221736U CN 2175825 Y CN2175825 Y CN 2175825Y
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Abstract
The utility model discloses a surveying device for dynamic water level of a pumping well, which comprises a signal transmitting part and a signal receiving and surveying part, wherein, the main design in the surveying part improves an amplifying blocking circuit, a full phase amplifying circuit, a signal detecting circuit, a pulse width detection circuit and a coincidence circuit; the surveying part combines an autocorrection mechanism, filters and blocks various jamming signals to the pumping well and accordingly the buried depth value of the water level is surveyed. The utility model can survey dynamic water level buried depth of various pumping wells and the position where the pipe is blocked, and has the advantages of surveying labor intensity reduction, surveying precision increase and work efficiency increase.
Description
The utility model relates to a kind of level indicator, the device of specifically a kind of measuring machine well water position.
The CN86208888 patent disclosure a kind of motor-pumped well sound wave water level instrument, this instrument includes signal generation and divides and measure portion, distributes sound wave by signal generation, and measure portion receives and transmits and water level boundary reflection signal, obtain the time difference, calculate the depth to water of motor-pumped well in conjunction with velocimeter.Because at present submersible pumps that use in the motor-pumped well, obstacles such as the pump line flange in the well, cable, galvanized wire increase, and cause the acoustic reflection interface to increase, and make relatively difficulty of measurement more.And the poor anti jamming capability of this instrument, be unsuitable for carrying out the measurement of dynamic water level buried depth.The dynamic water level buried depth is to estimate one of the one-tenth well quality of motor-pumped well and the important parameter in application life, so there is bigger limitation in the use of this instrument.
The purpose of this utility model just provides a kind of device that motor-pumped well dynamic water level buried depth is measured that carries out, to improve the level of Evaluation of Groundwater Resources and management.
The utility model is achieved in that by booster circuit, controllable silicon discharge switching circuit, level pressure circuits for triggering and sounding chieftain and constitutes signal emission part that measure portion is connected to form by probe, bandwidth-limited circuit, amplification disable circuit, full phase place amplifying circuit, signal detection circuit, pulse width detection circuit, coincident circuit, RC oscillating circuit, memory circuit, phase-locked loop circuit, self-locking bistable circuit, AND circuit, drive circuit, display, voltage boosting and stabilizing circuit, display, voltage boosting and stabilizing circuit, display driver circuit, reset circuit.
When carrying out the measurement of dynamic water level buried depth, in motor-pumped well except that have transmit and the water-reflected signal, the noise signal that also exists pump operation to produce, the reflected signal of the above well casing reducing of water surface position, the reflected signal of obstacle such as flange, cable, and multiple interfering signal such as standing wave reflected signal.Thereby the signal in the water level detection gauge receives measure portion and should possess to detect in above-mentioned numerous signals and transmit and the ability of water-reflected signal.Observe according to a large amount of actual measurement, the amplitude of the noise signal that produces except that the water pump running was lower slightly, the amplitude difference of all the other reflected signals was little; On the duration, except that transmit, the reducing position reflected signal, water-reflected signal, the time that all the other reflected signals continue is short.Based on this point, in this limnimeter, with the interfering signal beyond the bandwidth-limited circuit filtering working band, eliminate part with the amplification disable circuit and disturb earlier, improve signal to noise ratio, the ratio of noise amplitude and other signal amplitudes is reduced.Utilize full phase place amplifying circuit with signal amplification, negative-going signal paraphase, warp or door, anti-phase negative-going signal is inserted between forward signal, form forward signal.Block the noise signal that pump operation produces with automatic threshold values amplitude detecting circuit, output and corresponding pulse signal signal duration.With the pulse width detection circuit filtering transmit, various reflected signals beyond the reducing position, water-reflected signal.Use the progression of coincident circuit again, remove reducing position reflected signal with selector switch according to the above well casing reducing of the water surface, obtain transmitting and water be reflected signal.
Because the spread speed of sound wave in motor-pumped well is a variable, need to adopt bulk sound velocity as with machine in the physical quantity of signal analogy, signal receiving circuit received transmits and time interval of water-reflected signal is to the overwater propagation time 2 times of popping one's head in, in order directly to demonstrate the distance of popping one's head in to the water surface, signal frequency should be 1/2nd of bulk sound velocity in the machine.
Bulk sound velocity can be expressed as V=V0+ △ V, and wherein V0 is a definite value, and △ V is the part that is subjected to the change of weather factor affecting.Statistics shows, with 1 meter gas-liquid of below ground in the well casing △ V is simulated, and can make the measure error scope in design objective.The interior signal source frequency of machine also correspondence table is shown f=f0+ △ f, and wherein f0 fixes, and △ f changes with 1 meter gas-liquid in the motor-pumped well, i.e. correction portion.For making in the machine signal frequency can bulk sound velocity analogy in the motor-pumped well when measuring, realize guaranteeing certainty of measurement from dynamic(al) correction, conceive as follows:
Adopt phase-locked loop circuit, wherein the high position of program frequency dividing circuit presets end and presets fixingly, forms f0, and low level presets end and presets the temperature that depends on 1 meter of below ground in the motor-pumped well, forms △ f, and its output is f=f0+ △ f.
Be simplified structure, temperature-sensing element is packed into and is comprised in the probe of microphone, arrive 1 meter of below ground in the motor-pumped well down, and receive in the RC oscillating circuit as timing element, make the signal pulse of output of RC oscillating circuit and temperature corresponding frequencies, with 1 second positive pulse of self-locking bistable circuit output width with after, be added in the frequency dividing circuit.The low level of program frequency dividing circuit presets corresponding connection of end in each output of frequency dividing circuit and the phase-locked loop circuit, and it is preset accordingly by temperature, has realized that automatic school ends.
As unified whole, the design of this instrument remainder is as follows:
To transmit, a water-reflected signal or a second signal are received in the self-locking bistable circuit through changeover switch, in the positive pulse of self-locking bistable circuit output respective width and the machine signal with after receive contain counting, latch, in the drive circuit of gating, the driving display demonstration.With the reset circuit control demonstration time, show when finishing, make relevant circuit zero clearing, change over to next time and measure.
The demonstration of supply voltage, gate can be received corresponding signal in the display driver circuit, and driving display shows.
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is the circuit block diagram of this limnimeter signal emission part;
Fig. 2 is the circuit block diagram of this limnimeter measure portion;
Fig. 3 is the concrete electrical schematic diagram of the amplification disable circuit in the measure portion, full phase place amplifying circuit, signal detection circuit, pulse width detection circuit and several parts of coincident circuit.
Fig. 4 is the electrical schematic diagram of the automatic correcting mechanism in the measure portion.
As shown in Figure 1, the signal emission part of this limnimeter is with booster circuit 1, charging resistor R
B, controllable silicon discharge switching circuit 2, sounding chieftain 4 be connected in series successively, level pressure circuits for triggering 3 are connected to discharge switching circuit 2 respectively and by K switch 1 and charging resistor R
BOne end connects.
Supply voltage is after booster circuit 1 boosts, through charging resistor R
BBe added to respectively in controllable silicon discharge switching circuit 2 and the level pressure circuits for triggering 3, when the voltage on the storage capacitor in the controllable silicon discharge switching circuit 2 rises to when the selected level pressure of K1 triggers branch road work, trigger the controllable silicon in the controllable silicon discharge switching circuit 2, energy stored on the storage capacitor is discharged through the load of controllable silicon to the sounding chieftain, make the sounding chieftain launch acoustic signals.
Fig. 2 has provided the circuit block diagram of this limnimeter measure portion, wherein, a road of probe 5 with bandwidth-limited circuit 6, amplification disable circuit 7, the b that throws of phase place amplifying circuit 8, signal detection circuit 9, pulse width detection circuit 10, coincident circuit 11, changeover switch K3 is connected in series successively entirely; The other end of probe 5 is connected in series successively with RC oscillating circuit 12, memory circuit 13, phase-locked loop circuit 14, AND circuit 16, drive circuit 17, display 18.Another output of phase-locked loop circuit 14 is connected with a that throws of memory circuit 13, changeover switch K3 respectively, the cutter spacing of changeover switch K3 is connected with self-locking bistable circuit 15, display driver circuit 20 respectively, and another input of self-locking bistable circuit 15 and AND circuit 16 links to each other.Voltage boosting and stabilizing circuit 19, display driver circuit 20, display 18 are connected in series successively.An output of reset circuit 21 is connected with coincident circuit 11, self-locking bistable circuit 15 respectively, and another output is connected with drive circuit 17.
In above-mentioned measure portion, dress microphone and temperature-sensing element in the probe 5, full phase place amplifying circuit 8 is by amplifying circuit, phase inverter and OR circuit are formed, signal detection circuit 9 is by automatic threshold values amplitude detecting circuit, amplifying circuit and phase inverter are formed, coincident circuit 11 is by pulse distributor, differential circuit, shaping circuit and OR circuit are formed, memory circuit 13 is by the self-locking bistable circuit, AND circuit and frequency dividing circuit are formed, phase-locked loop circuit 14 is by crystal oscillating circuit, pre-frequency dividing circuit, phase-comparison circuit, low-pass filter circuit, Voltage-Controlled oscillation circuit, program frequency dividing circuit and frequency dividing circuit are formed, and drive circuit 17 is by counting circuit, latch cicuit, gating circuit and drive circuit are formed.
Sounding chieftain 4 emitting sound wave signals, noise signal that pump operation produces and the various reflected signals in the motor-pumped well are popped one's head in 5 to be picked up, interfering signal beyond bandwidth-limited circuit 6 filtering service bands, be added to and amplify in the disable circuit 7, through amplifying, blocking action, after having improved signal to noise ratio, be added in the full phase place amplifying circuit 8, through amplifying, paraphase, the negative-going signal of forward signal and paraphase or door on addition formed and comprise and transmitting, the mixing forward signal of the noise signal that boundary reflection signal and pump operation produce, be added in the signal detection circuit 9, select Initial Hurdle to be higher than the amplitude that the running of input charging pump produces noise signal, eliminated this noise signal, and transmit, the boundary reflection signal is through automatic threshold values amplitude detecting circuit, at the output output of amplifying circuit and the direct impulse signal of respective width signal duration, be added in the pulse width detection circuit 10, remove and transmit, the reducing position, outside the water-reflected signal, all the other boundary reflections are short signal duration, corresponding signal pulse width is narrow, adjust the time constant of the single-shot trigger circuit in the circuit, can this part boundary reflection signal of filtering.Transmit for 10 comprising of output by pulse width detection circuit, the reducing position, the direct impulse signal of water-reflected signal is added to the CP end of pulse distributor in the coincident circuit 11, transmit and make Q1 generation positive exponent transition path position and water-reflected signal make Q2 to Q5 produce positive step successively, select the positive step that the water-reflected signal produces with selector switch K2 according to the above well casing reducing of water surface situation, two positive step signals are through differential, shaping, or door on export and transmit, two positive pulse signals of water-reflected signal, be added to the input of self-locking bistable circuit 15 through changeover switch K3, output output width is that △ T(is promptly from transmitting through popping one's head in 5, arrive the water surface and arrive 5 times of ending of probe again through reflection) positive pulse, be added to an input of AND circuit 16.
The signal pulse of the crystal oscillating circuit output in the phase-locked loop circuit 14, behind the frequency dividing circuit frequency division, one the tunnel is input in the phase-comparison circuit, another road output second signal pulse, throw an a as the self-test signal except that what be added to changeover switch K3, also be added to the CP end of the self-locking bistable circuit in the memory circuit 13.
Temperature-sensing element in the probe 5 is received in the RC oscillating circuit 12 as timing element, the signal pulse of probe 5 position temperature corresponding frequencies in output output and the motor-pumped well, be added in the memory circuit 13 on the input with door, the width of self-locking bistable circuit output output is that 1 second positive pulse is added to another input with door, with after be added to the CP end of frequency dividing circuit, make each output corresponding current potential occur.Because self-locking action, the current potential of each output of frequency dividing circuit no longer changes, and has memory function, can make like this in the measuring process that signal frequency does not change in the machine, and the stability of measurement result is improved.After pressing button AN, make relevant circuit zero clearing, repeat said process again.
Each output of frequency dividing circuit is received the low level of program frequency dividing circuit in the phase-locked loop circuit 14 and is measured on the end in advance, the pre-amount of high-order pre-amount end is fixing, generate f0, low level preset end by in the motor-pumped well probe 5 positions temperature preset accordingly, generate △ f, this not only makes the frequency of phase-locked loop circuit output have the form of f=f0+ △ f, but also has possessed zero offset capability.
The interior signal of the machine of a certain frequency is added to another input of AND circuit 16 in the 16000-18000Hz scope of phase-locked loop circuit 14 outputs, with after be added on the CP end of drive circuit 17, in the △ T time to machine in signal count, through latch, gating, driving display 18 demonstrates probe 5 distances to the water surface, this distance adds probe 5 distances apart from ground, obtains depth to water.
Changeover switch K3 pulls when a of self check position, and second signal pulse replaces transmitting, and the water-reflected signal inserts, and demonstrates signal frequency in the machine by display 18.
Draw power supply voltage signal in voltage boosting and stabilizing circuit 19, obtain signal strobe and be added in the display driver circuit 20 on the cutter spacing of changeover switch K2, by the output output drive signal, driving display 18 shows.
Be to improve the capacity price ratio of power supply, reduced volume, visit with No. 1 battery through voltage boosting and stabilizing circuit 19 boost, after the voltage stabilizing to circuit supply.
Accept in the measure portion at the signal of this limnimeter, the specific implementation of each mechanism is consistent with the counterpart structure of former motor-pumped well sound wave water level instrument mostly, minority is to adopt known electronic circuit and connected mode thereof to constitute, and its physical circuit of the several sections of redesign is seen accompanying drawing 3.
Among Fig. 3, amplifying disable circuit 7 is main amplifier element with compound transistor T1, T2, is equipped with resistance R 1-R9, capacitor C 1-C4 and is formed by connecting.Collector output connection diode D1, D2 reverse by one group and that connect at T2 are connected in series the disable circuit that constitutes mutually with resistance R 9.Signal from bandwidth-limited circuit 2 outputs is added to through capacitor C 1 on the base stage of transistor T 1, after the secondary of transistor T 1, T2 amplifies, is input in the disable circuit of being made up of diode D1, D2, resistance R 9.Through the obstruction of diode D1, D2, output is through amplifying the signal that blocks on R9.
If the signal to noise ratio of transistor T 1 base input signal is Us/U
N, the voltage amplification factor of circuit is A, the forward voltage drop of diode D1, D2 is U
D, resistance R then
9The signal to noise ratio of last output signal becomes (AUs-U
D)/(AU
N-U
D), greater than Us/U
NWhen the noise signal amplitude of input less than U
DDuring/A, then get clogged.
Full phase place amplifying circuit 8 includes the amplifying circuit that is connected into by amplifier IC1 and peripheral resistance R 10-R12, capacitor C 5, the phase inverter that connects into by amplifier IC2 and peripheral resistance R 13-R15, capacitor C 6, and OR circuit three parts that connect into by diode D3, D4 and resistance R 16.Wherein after C5 and the R10 serial connection, an end connects the output that amplifies disable circuit 7, and the other end is received the negative input of IC1.The output one tunnel of IC1 is received the negative input of IC2 through C6, R13, and another road meets diode D3.The output of IC2 meets diode D4, series resistor R16 after the negative pole of D3, D4 joins.
The signal that takes out from the output resistance R9 that amplifies disable circuit 7 through phase place amplifying circuit 8 entirely capacitor C 5 and resistance R 10 after be added to the negative input of amplifier IC1, after IC1 amplifies, the diode D3 of leading up to is added on the resistance R 16, and another road is through being added on the resistance R 16 by diode D4 after the IC2 paraphase.Adjust the voltage gain of amplifier IC1, IC2, make R16 go up positive negative sense signal amplification quantity and equate, do not produce slicing thereby make to transmit.On R16, obtained comprising through OR circuit transmit, the forward signal of noise signal that boundary reflection signal and pump operation produce.
Under original state, the current potential U on the threshold values capacitor C 8
ADividing potential drop decision by resistance R 19-R21.U
AHigher, antijamming capability is stronger, and required transmitting power is also bigger.Generally speaking, U
ADuring=1/2Vcc, get final product the noise signal that the filtering pump operation produces, satisfy dynamic water level buried depth Testing requirement.When depth to water is very big, when transmitting power is not enough, can adjusts R19 and make U
ADescend, to improve the sensitivity that receives; When noise is big in the motor-pumped well, adjusts R19 and make U
ARise, increase transmitting power simultaneously, to improve signal to noise ratio.At U
ADuring=1/4～3/4Vcc, can satisfy most motor-pumped well depth to water Testing requirement.
The forward signal that obtains from the output resistance R16 of full phase place amplifying circuit 8 is added on the positive input of operational amplifier IC3 through capacitor C 7, resistance R 17, and the current potential of negative input depends on U
ARegulate R19 and make U
AThe amplitude of the noise signal that produces greater than operational amplifier positive input charging pump running, then this signal gets clogged.
In the preceding half period that signal arrives, as signal amplitude U+＞U
AThe time, the output output of operational amplifier IC3 gives capacitor C 8 chargings by D5.Because charging resistor is little, U
AIt is very fast to rise, and later half cycle signal amplitude falls after rise, and capacitor C 8 is by resistance R 21 discharges.Because of time constant is selected greatlyyer, to the preceding half period signal amplitude U+＞U in next cycle
ABefore, U
AIt is few to descend, in the signal period afterwards, as long as signal amplitude U
ADo not undergo mutation U
ACan not undergo mutation yet, on capacitor C 8, generate the corresponding threshold voltage of amplitude so automatically with signal.
When signal amplitude U+ no longer greater than U
AThe time, capacitor C 8 is by resistance R 21 continuous discharges, on capacitor C 8, obtain a width and signal duration corresponding forward signal.
The forward signal of capacitor C 8 is added to the negative input of operational amplifier IC4 by resistance R 22, capacitor C 9, adjusting voltage gain makes it possess the function of amplification, shaping, the negative-going pulse signal of output output is added to by C10 in the negative circuit of being made up of transistor T 3 grades, through the anti-phase direct impulse signal that obtains on resistance R 27.
Pulse width detection circuit 10 by triode T4, d type flip flop IC5, IC6 be equipped with resistance R 28-R31, potentiometer W1, capacitor C 11, diode D6 is formed by connecting.The base stage of T4 is joined through the output of resistance R 28 with signal detection circuit 9, its grounded emitter, and colelctor electrode connects the R end of IC6.The CP end of IC5 and the D end of IC6 also are connected respectively to the output of signal detection circuit 9.Potentiometer W1 is after resistance R 31 serial connection again and between diode D6 and the Q end of receiving IC5 hold with R.
In pulse width detection circuit, d type flip flop IC5 etc. is connected into monostable flipflop.Make the D end signal of d type flip flop IC6 be added to the Q end, its CP end must have the current potential of rising, and the current potential of this rising is when restoring from single-shot trigger trigger
End becomes high potential by electronegative potential.The forward position of direct impulse signal is triggered monostable trigger, and when the △ t time restored, if the direct impulse signal still exists, then d type flip flop IC6 was triggered, and during signal ended, through transistor T 4 paraphase, it is resetted, at Q end output one positive pulse signal.
If the direct impulse signal does not exist, it is resetted, the Q end is kept low level state, no-output.
Be added in the forward signal pulse of CP end among the d type flip flop IC5, except that transmit, the reducing position, water-reflected signal, remaining boundary reflection is short signal duration, the width of signal pulse is narrow, adjust the time constant of monostable circuit, at △ t=(W1+R31) during C11=0.04～0.15 second, can filter these boundary reflection signals.
When depth to water hour, the time that the water-reflected signal continues also can shorten, and regulator potentiometer W1 makes △ t close to lower limit (0.054 second), so that measure.
A large amount of motor-pumped well survey data show, surpass the very few for counting of three utmost point reducings in the motor-pumped well structure, therefore are provided with three grades of reducings for you to choose.
The transmitting of the Q of d type flip flop IC6 end output, reducing position, water-reflected signal pulse are added to the CP end of pulse distributor IC7, transmit signal pulse makes Q1 produce positive step, through capacitor C 12, resistance R 33 differential, be added to the input of shaping circuit IC8 through diode D7, after shaping, be input to shaping circuit IC9 and carry out paraphase, obtain transmit signal pulse.
Three grades of reducing position reflected signal pulses make Q2, Q3, Q4 produce positive step successively, and the water-reflected signal pulse makes Q5 produce positive step.When the above well casing of the water surface did not have reducing, selector switch K2 pulled 0; When the one-level reducing is arranged, pull 1, the rest may be inferred.
Select the positive step signal that the water-reflected signal pulse produces with selector switch K2, through capacitor C 13, resistance R 35 differential, be added to the input of shaping circuit IC10 through diode D8, after shaping, be input to shaping circuit IC11 and carry out paraphase, obtain the water-reflected signal pulse.
Transmit signal pulse, water-reflected signal pulse through diode D9, D10, resistance R 37 form or doors, obtain tandem two pulses on resistance R 37, be added to the throwing on the b of changeover switch K3.
Fig. 4 has provided a kind of reference circuit structure of this limnimeter automatic correcting mechanism.This mechanism is connected to form by temperature-sensing element Rt, RC oscillating circuit 12, memory circuit 13 and phase-locked loop circuit 14 in the probe 5.JK flip-flop IC12, IC13 connect into self-locking bistable circuit in the memory circuit 13 according to function among the figure, diode D11, D12 and resistance R 38 connect into the AND circuit in the memory circuit 13, integrated IC14 is the frequency dividing circuit in the memory circuit 13, its each Q end successively with phase-locked loop circuit 14 in the low level of program frequency dividing circuit preset the corresponding connection of end.
Temperature-sensing element Rt in the probe 5 receives in the oscillating circuit 12 as timing element, the pulse of probe 5 position temperature respective frequencies in output output and the motor-pumped well.Select the gear of selector switch K4, to satisfy the requirement to signal frequency such as motor-pumped well structure types, depth to water scope and exploitation state.
The signal pulse of oscillating circuit 12 outputs is added on the negative pole of diode D11, second, signal pulse was added to the CP end of JK flip-flop IC12,1 second positive pulse of output width is added on the negative pole of diode D12 on the Q end, through diode D11, D12, resistance R 38 that form with door, be added to the CP end of frequency dividing circuit IC3, make each Q bring out the current potential of existing correspondence.Because self-locking after 1 second the positive pulse of Q end output width of JK flip-flop IC12, just is in electronegative potential, blocks with door, the current potential of each Q end of frequency dividing circuit IC14 is no longer changed, thereby have memory function.After pressing button AN, JK flip-flop IC12, IC13, frequency dividing circuit IC14 zero clearing repeat said process again.Capacitor C 17, resistance R 39 have constituted the start clear circuit.
Memory circuit in the employing can make signal frequency maintenance definite value in the machine in measuring process, guaranteed the stability of measurement result.
The corresponding successively low level that is connected to program frequency dividing circuit in the phase-locked loop circuit 14 of each Q end of frequency dividing circuit IC14 presets on the end, and its temperature by probe 5 present positions in the motor-pumped well is preset accordingly, has realized zero offset capability.
In the electrical schematic diagram of measure portion, each model of integrated selection is respectively: IC1-IC4:1/4TL084, IC5, IC6:1/2CD4013, IC7:CD4017, IC8-IC11:1/6CD40106, IC12, IC13:1/2CD4027, IC14:CD4520.
Measurement category 10-200 rice of the present utility model; Measure error is not more than 3%; 2 centimetres of resolution ratio; The fastest measuring speed is no less than per minute 10 times, and is easy to use, and volume is little, is easy to carry.Adopt powered battery, be fit to open-air the use.This instrument can not only be measured the dynamic water level buried depth of various structure types motor-pumped wells, also can be used to the position that measuring channel stops up, and has alleviated observer's labour intensity, has improved certainty of measurement and operating efficiency.
Claims (6)
1, a kind of sound wave water level instrument, its signal emission part is by booster circuit 1, controllable silicon discharge switching circuit 2, level pressure circuits for triggering 3 and sounding chieftain 4 form, and it is characterized in that measure portion is by probe 5, bandwidth-limited circuit 6, amplify disable circuit 7, full phase place amplifying circuit 8, signal detection circuit 9, pulse width detection circuit 10, coincident circuit 11, RC oscillating circuit 12, memory circuit 13, phase-locked loop circuit 14, self-locking bistable circuit 15, AND circuit 16, drive circuit 17, display 18, voltage boosting and stabilizing circuit 19, display driver circuit 20, reset circuit 21 connects to form.
2, sound wave water level instrument according to claim 1, it is characterized in that amplifying disable circuit 7 is main amplifier element with compound transistor T1, T2, be equipped with resistance R 1-R9, capacitor C 1-C4 and be formed by connecting, be connected in series the disable circuit that constitutes mutually with resistance R 9 at collector output connection diode D1, the D2 reverse by one group and that connect of T2.
3, sound wave water level instrument according to claim 1, it is characterized in that full phase place amplifying circuit 8 includes by amplifier IC1 and peripheral resistance R 10-R12, the amplifying circuit that capacitor C 5 connects into, by amplifier IC2 and peripheral resistance R 13-R15, the phase inverter that capacitor C 6 connects into, and by diode D3, OR circuit three parts that D4 and resistance R 16 connect into, wherein after C5 and the R10 serial connection, one end connects the output that amplifies disable circuit 7, the other end is received the negative input of IC1, the output one tunnel of IC1 is through C6, R13 receives the negative input of IC2, another road meets diode D3, the output of IC2 meets diode D4, D3, series resistor R16 after the negative pole of D4 joins.
4, sound wave water level instrument according to claim 1, it is characterized in that signal detection circuit 9 includes by amplifier IC3 and peripheral resistance R 17-R21, capacitor C 7, C8, the automatic threshold values detecting circuit that diode D5 connects and composes, by amplifier IC4 and peripheral resistance R 22-R24, capacitor C 9, the amplifying circuit that C10 connects and composes, and phase inverter three parts that connect and compose by triode T3 and resistance R 25-R27, wherein C7 is connected the output of full phase place amplifying circuit 8 with R17 serial connection back one end, the other end is received the positive input of IC3, behind the output serial connection diode D5 of IC3, one the tunnel connects the branch road that is in parallel by threshold values capacitor C 8 and resistance R 21, another road is through C9, R22 receives the negative input of IC4, and the output of IC4 is connected on the base stage of T3 in the phase inverter through capacitor C 10.
5, sound wave water level instrument according to claim 1, it is characterized in that pulse width detection circuit 10 by triode T4, d type flip flop IC5, IC6 be equipped with resistance R 28-R31, potentiometer W1, capacitor C 11, diode D6 is formed by connecting, the base stage of T4 is joined through the output of resistance R 28 with signal detection circuit 9, its grounded emitter, colelctor electrode connects the R end of IC6, the D end of the CP of IC5 end and IC6 also is connected respectively to the output of signal detection circuit 9, potentiometer W1 after resistance R 31 serial connections again and diode D6 and receive the Q end of IC5 and between R holds.
6, sound wave water level instrument according to claim 1, it is characterized in that coincident circuit 11 includes by trigger IC7 and resistance R 32, the pulse distributor that changeover switch K2 connects into, by capacitor C 12, C13, resistance R 33, two differential circuits that R35 connects into, by diode D7, D8, resistance R 34, R36 and the integrated shaping circuit that IC8-IC11 connects into, and by diode D9, OR circuit four parts that D10 and resistance R 37 connect into, wherein the CP of IC7 end joins with the output of pulse width detection circuit 10, Q1 end serial connection one road differential circuit, meet diode D9 behind the shaping circuit, Q2 to Q5 end is received the corresponding of selector switch K2 respectively and is thrown on the position, the cutter spacing of K2 meets diode D10 after being connected in series another road differential circuit and shaping circuit, diode D9, the negative pole of D10 is connected, one road series resistor R37, another road connects conversion K switch 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93221736U CN2175825Y (en) | 1993-08-14 | 1993-08-14 | Sonic water gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93221736U CN2175825Y (en) | 1993-08-14 | 1993-08-14 | Sonic water gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2175825Y true CN2175825Y (en) | 1994-08-31 |
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ID=33800512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93221736U Expired - Fee Related CN2175825Y (en) | 1993-08-14 | 1993-08-14 | Sonic water gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2175825Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101183151B (en) * | 2007-11-28 | 2010-06-02 | 杭州瑞利声电技术公司 | Bottom hole falling article ultrasound image-forming detection method and apparatus |
-
1993
- 1993-08-14 CN CN93221736U patent/CN2175825Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101183151B (en) * | 2007-11-28 | 2010-06-02 | 杭州瑞利声电技术公司 | Bottom hole falling article ultrasound image-forming detection method and apparatus |
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