CN102221391B - Light controlling device for measuring penetrant level of soil sample - Google Patents
Light controlling device for measuring penetrant level of soil sample Download PDFInfo
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- CN102221391B CN102221391B CN2011100711866A CN201110071186A CN102221391B CN 102221391 B CN102221391 B CN 102221391B CN 2011100711866 A CN2011100711866 A CN 2011100711866A CN 201110071186 A CN201110071186 A CN 201110071186A CN 102221391 B CN102221391 B CN 102221391B
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Abstract
The invention discloses a light controlling device for measuring penetrant level of a soil sample, comprising a transparent glass tube, a T-shaped guide pipe, an opening container, a light source component, a sensor module, a signal processing machine and a computer, wherein the T-shaped guide pipe is vertically inserted in the opening container; the light source component comprises a modulation signal generator and a linear light source; the sensor module comprises a light detector, a preamplifier, a radiodetector and a digital signal processor; the linear light source is matched with the light detector; the linear light source and the light detector, facing to each other, are arranged at two sides of the transparent glass tube in transverse direction; the signal processing machine comprises a data input terminal and a data output terminal; the data input terminal is connected with the digital signal processor; and the data output terminal is connected with the computer. The light controlling device overcomes the defects that the reading is inaccurate and the measurement can not be done in real time when liquid level data are observed by naked eyes, and is an electronic measurement device that can fully and automatically measure the penetrant level of the soil sample.
Description
Technical field
The present invention relates to light controlling device, relate in particular to a kind of light controlling device of measuring the infiltration liquid level of soil sample.
Background technology
In the engineering construction process; For the time factor of analyzing the ground consolidation sedimentation is provided; Estimate the seepage flow and the analysis of seepage flow stability of subsoil, earth dam, high fill, and the plumbing design, construction is selected materials; Artificial reduction water level and foundation stabilization design etc., the perviousness measurement data of soil sample is important basic parameter always.The infiltrative measurement of soil sample generally is to accomplish through the height of measuring transparency liquid liquid level in the transparent glass tube that inserts in the soil sample; At present; Most of occasion all is through liquid level in people's visual inspection transparent glass tube, utilizes the artificial reference mark on the transparent glass tube that reads.This metering system inevitably have the error of vision, measurement result can vary with each individual; Also can't accomplish dynamically in good time measurement accurately; Running into task survey crew consuming time possibly at every moment not keep watch.
Therefore, those skilled in the art is devoted to develop a kind of light controlling device of infiltration liquid level of measurement soil sample of full-automation.
Summary of the invention
Because the above-mentioned defective of prior art, the purpose of this invention is to provide a kind of light controlling device of infiltration liquid level of measurement soil sample of full-automation.
For realizing above-mentioned purpose, the invention provides a kind of light controlling device of measuring the infiltration liquid level of soil sample, comprise open containers, transparent glass tube, T type conduit, light source assembly, sensor assembly, signal processor and computing machine;
Said transparent glass tube both ends open; Said T type conduit has first end, second end and the 3rd end, and said first end opening also is connected with transparent glass tube, said second end opening and vertical the insertion in the tested soil sample that holds in the said open containers, and said the 3rd end is provided with a valve; Fill transparency liquid in said transparent glass tube and the T type conduit;
Said light source assembly comprises modulation signal generator and linear light sources, and said modulation signal generator links to each other with linear light sources;
Said sensor assembly comprises photo-detector, prime amplifier, wave detector and digital signal processor, and said photo-detector links to each other with wave detector through prime amplifier, and said wave detector links to each other with digital signal processor;
Said linear light sources cooperates with said photo-detector, and the opposed facing both lateral sides that places said transparent glass tube is used to measure the liquid level of said transparency liquid;
Said signal processor comprises data input pin and data output end, and said data input pin links to each other with said digital signal processor, and said data output end links to each other with said computing machine.
In preferred embodiments of the present invention, wherein said transparency liquid is a water.
In another preferred embodiments of the present invention, wherein said modulation signal generator comprises high-speed mixing signal processor, sine wave generating circuit and phase coordination parts; Said high-speed mixing signal processor links to each other with the phase coordination parts through sine wave generating circuit, and said phase coordination parts link to each other with said linear light sources.
In another preferred embodiments of the present invention, wherein said linear light sources is a cathode fluorescent tube, and said modulation signal generator also comprises the high pressure energizing circuit, and said high-speed mixing signal processor links to each other with cathode fluorescent tube through the high pressure energizing circuit.
In another preferred embodiments of the present invention, wherein said light source assembly also comprises automatic power control circuitry, and said automatic power control circuitry comprises the average light current measurement circuit, and said automatic power control circuitry links to each other with said modulation signal generator.
In another preferred embodiments of the present invention, wherein said light source assembly also comprises monochromatic ring and slit light hurdle.
In another preferred embodiments of the present invention; Wherein said photo-detector is the semiconductor optoelectronic array; The pixel of said semiconductor optoelectronic array adopts the silicon photo-detector; Said sensor assembly also comprises bias box, and the sensor assembly power input links to each other with the semiconductor optoelectronic array through bias box.
In another preferred embodiments of the present invention, wherein said wave detector is a phase-sensitive detector (PSD), and said phase-sensitive detector (PSD) places the complex programmable logic controller.
In another preferred embodiments of the present invention, wherein said photo-detector also comprises bandpass filter, and said bandpass filter cooperates the opposed facing both lateral sides that places said transparent glass tube with said slit light hurdle.
In another preferred embodiments of the present invention; Wherein said computing machine comprises communication module, main control module, memory module, interactive module and external unit; Said communication module links to each other with interactive module with memory module through main control module, and said interactive module links to each other with external unit.
The light controlling device of the infiltration liquid level of measurement soil sample of the present invention adopts the photoelectricity non-contact measurement, accomplishes the measurement of precise and high efficiency with harmless mode; Having overcome the inexactness of people's naked-eye observation level readings and the defective that can't measure in real time, is a kind of electronic measuring device of infiltration liquid level of measurement soil sample of full-automation, can accomplish full-automatic high efficiency measuring task.
Below will combine accompanying drawing that the technique effect of design of the present invention, concrete structure and generation is described further, to understand the object of the invention, characteristic and effect fully.
Description of drawings
Fig. 1 is the system architecture synoptic diagram of a preferred embodiment of the present invention;
Fig. 2 is the structural representation of the light source assembly of a preferred embodiment of the present invention;
Fig. 3 is the structural representation of the sensor assembly of a preferred embodiment of the present invention;
Fig. 4 is the structural representation of the computing machine of a preferred embodiment of the present invention.
Embodiment
As shown in Figure 1, in preferred embodiment of the present invention, a kind of light controlling device of measuring the infiltration liquid level of soil sample comprises T type conduit 7, transparent glass tube 1, open containers 2, light source assembly 3, sensor assembly 4, signal processor 5 and computing machine 6.Light source assembly 3 comprises modulation signal generator 31 and linear light sources 32, and modulation signal generator 31 links to each other with linear light sources 32.Sensor assembly 4 comprises photo-detector 41, prime amplifier 42, wave detector 43 and digital signal processor 44, and photo-detector 41 links to each other with wave detector 43 through prime amplifier 42, and wave detector 43 links to each other with digital signal processor 44.
Shown in Fig. 1, transparent glass tube 1 both ends open.T type conduit 7 has first end 71, second end 72 and the 3rd end 73; First end, 71 openings also are connected with transparent glass tube 1, second end, 72 openings and vertical the insertion in the tested soil sample that holds in the open containers 2, and the 3rd end 73 is provided with a valve 8.Fill transparency liquid in transparent glass tube 1 and the T type conduit 7.Linear light sources 32 cooperates with photo-detector 41, and the opposed facing both lateral sides that places transparent glass tube 1 is used to measure the liquid level of transparency liquid; Digital signal processor 44 links to each other with the data input pin of signal processor 5; The data output end of signal processor 5 links to each other with computing machine 6.
The light controlling device of the infiltration liquid level of measurement soil sample of the present invention through measure be inserted into open containers in tested soil sample in the transparent glass tube that links to each other of T type conduit on the infiltration liquid level of transparency liquid calculate the perviousness of tested soil sample.Shown in arrow among Fig. 1, when need were injected into liquid in the transparent glass tube, valve 8 was opened, and liquid gets in T type conduit 7 and the transparent glass tube 1 through the 3rd end 73 of T type conduit 7.When transparency liquid arrives required liquid level scale; Valve-off 8; At this moment, because the both ends open of the integral body that T type conduit 7 links to each other with transparent glass tube 1, and vertically be inserted in the tested soil sample; Under the influence of atmospheric pressure and self gravitation, the transparency liquid in T type conduit and the transparent glass tube can move down; Therefore can cause the tested soil sample in the open containers that transparency liquid is produced a resistance that makes progress, influence transparency liquid and move down, and can on transparent glass tube, produce a liquid level that descends gradually.The decline that this liquid level can produce different amplitudes along with the perviousness of time and different soil samples.The measurement data of the present invention thereby fall that can be through reading this liquid level also and then calculates the perviousness of soil sample.
The present invention uses the parts of the light controlling devices such as light source assembly that place the transparent glass tube both lateral sides and accomplishes reading of full automatic measurement data.As shown in fig. 1,, the light source assembly in the present embodiment 3 can start inner modulation signal generator 31 and linear light sources 32 after connecting supply power, produce required line style light; Tested transparent glass tube by line style illumination bright after; There are region of fluid and the intersection that does not have region of fluid the separatrix of energy can occur; This marginal signal passes to the photo-detector 41 of sensor assembly 4, and after the conditioning of prime amplifier 42, wave detector 43 and the digital signal processor 44 of sensor assembly 4 and demodulation, obtains useful liquid level data signal.These liquid level data signals are transferred to computing machine 6 behind signal processor 5 orderings and relaying, and finally show, preserve and print measurement data by computing machine 6.The present invention utilizes light-operated technology to read the liquid level on the transparent glass tube, has improved the reading accuracy, and measurement that can dynamic real-time, thereby can accomplish full-automatic high efficiency measuring task.
Form as shown in fig. 1, that the present invention has adopted T type conduit 7 to be connected with transparent glass tube 1, and adopt the direction shown in arrow among Fig. 1 that transparency liquid is injected in the transparent glass tube 1.Valve 8 is used to control the folding of the 3rd end 73 of T type conduit 7 in the present embodiment, is convenient to transparency liquid is injected in transparent glass tube and the T type conduit, in other embodiments, also can omit T type conduit 7 and valve 8, directly adopts the transparent glass tube of T type.And as stated; In the present invention, the effect of transparent glass tube is contain fluid and the liquid level scale that the transparency liquid that is penetrated into gradually in the soil sample is provided, therefore in other embodiments; It is not the T type yet; Such as, but process the linear pattern of direct contain fluid, can read as long as can hold transparency liquid and have scale; In addition, in order accurately with easily to measure, the external diameter of transparent glass tube is 8 millimeters in the present embodiment, also can adopt the transparent glass tube of other shapes and external diameter in other embodiments, and present embodiment does not limit this.
In addition, the transparency liquid in this preferred embodiment is a water, and in other embodiments, transparency liquid also can be other liquid, and such as the water that has added color etc., as long as its porous is in soil sample and can allow light to see through, present embodiment does not limit this.
Comprise modulation signal generator 31 and linear light sources 32 in the light source assembly 3 of the present invention.Modulation signal generator 31 is used to produce linear light sources 32 and sends the required modulation signal of line style light.As shown in Figure 2, comprise high-speed mixing signal processor 33, sine wave generating circuit 34 and phase coordination parts 35 in the modulation signal generator 31; High-speed mixing signal processor 31 links to each other with phase coordination parts 35 through sine wave generating circuit 34, and phase coordination parts 35 link to each other with linear light sources 32.
Present embodiment high speed mixed-signal processor 33 is selected the high-speed mixing signal processor of a new generation's 8051 nuclears for use; As shown in Figure 2; The modulating pulse that this processor produces excites outside sine wave generating circuit 34; Behind the sine wave signal process phase coordination parts 35 that produce, produce frequency and all very pure modulation signal of phase place.Certainly in other embodiments, can take additive method, other processors and circuit etc. yet, send the required modulation signal of line style light as long as can produce linear light sources 32, present embodiment does not limit this.
In the present embodiment, modulation signal that aforesaid modulation signal processor 31 is produced and high-voltage driven signal are connected to CCFL line style lamp through reasonable proportioning, and CCFL line style lantern festival is sent the light signal with modulation signature.Certainly in other embodiments; Linear light sources also can adopt other types of light sources; Therefore and can omit the high pressure energizing circuit, and as long as accepting the modulation signal that modulation signal generator 31 sent, it sends light signal with modulation signature, present embodiment does not limit this.
As shown in Figure 2, in this preferred embodiment, also comprise automatic power control circuitry (APC circuit) 37 in the light source assembly 3.Comprise average light current measurement circuit (not shown) in the automatic power control circuitry 37, the average light current measurement circuit is accepted linear light sources 32 light signals and is fed back to APC circuit 37 after linear light sources 32 is sent light signal; The average luminous power of APC circuit 37 dynamic conversions, and the adjusting luminous power in good time according to the variation of luminous power to reach the requirement of the permanent power of light source, have been eliminated because of light source ages or colour temperature variation errors caused.Certainly, in other embodiments, can not establish the APC circuit, present embodiment does not limit this yet.
In addition, as shown in Figure 2, comprise also in the light source assembly 3 of this preferred embodiment that monochromatic ring 38 and slit light hurdle 30 are to be used to nurse one's health the spectrum and the transmission direction of light signal.Can obtain the spectrum consistent through adding monochromatic ring, add the transmission path that slit light hurdle can limit light signal, the balancing a survey light beam with photo-detector centre wavelength.Certainly, in other embodiments, can not establish monochromatic ring and slit light hurdle, present embodiment does not limit this yet.
As shown in Figure 3, the sensor assembly 4 of the light controlling device of the infiltration liquid level of measurement soil sample of the present invention comprises photo-detector 41, prime amplifier 42, wave detector 43 and digital signal processor 44.Photo-detector 41 adopts semiconductor (PIN) photovoltaic array, and PIN photovoltaic array pixel adopts the silicon photo-detector of high-speed and low-noise.In this preferred embodiment, the silicon photo-detector pixel of 1mm*1mm is bound into a row with the photoetching gap of 0.1mm, to form the measurement range of this preferred embodiment.In this preferred embodiment, whole measurement range is 260mm.In addition, as shown in Figure 3, comprise bias box 45 in the sensor assembly 4 in the present embodiment, the sensor assembly power input links to each other with the PIN photovoltaic array through bias box 45, and bias box 45 is used to the PIN photovoltaic array biasing high pressure is provided.When the light signal that is carrying metrical information shone on the PIN photovoltaic array, each silicon photo-detector can be because the biasing high pressure that bias box 45 is provided converts luminous energy into current signal.As shown in Figure 3, the current signal that is produced transfers to the prime amplifier 42 that links to each other with photo-detector 42, behind prime amplifier 42, is converted into voltage signal.The voltage signal of these various interfere informations that mixed needs could obtain useful pure required measuring-signal after the further upon mediation.
As shown in Figure 3, the wave detector 43 in this preferred embodiment is a phase-sensitive detector (PSD).Adopting the reason of phase-sensitive detector (PSD) is in the present embodiment, and the modulating frequency of light source and phase place are known.Adopt phase-sensitive detector (PSD) to be easier to extract metrical information.Certainly, in other embodiments, can adopt other wave detectors, present embodiment does not limit this yet.Simultaneously, in the present embodiment, phase-sensitive detector (PSD) 43 is arranged in the complex programmable logic controller (CPLD) 46.CPLD46 can be used for the signal selection and gathers sequential, and the clock signal of obtaining is sent in the digital signal processor (DSP) 44.Certainly, in other embodiments, can CPLD be set, present embodiment does not limit this yet.
As shown in Figure 3; The doping that prime amplifier 42 is produced the voltage signal of various interfere informations after phase-sensitive detector (PSD) 43 extracts; The useful metrical information that obtains is sent to the conversion of carrying out analog to digital in the digital signal processor (DSP) 44; And accomplish linear demarcation and linear fit, thereby obtain actual level value.
Shown in Fig. 3, the level value of the reality that digital signal processor (DSP) 44 is drawn is realized data transmission through the mode of digital communication with signal processor 5.
In addition,, comprise bandpass filter 40 in the sensor assembly 4, bandpass filter be used to the to decay various compositions of visible light as shown in Fig. 3.Bandpass filter in this preferred embodiment is selected lower limit 600mm for use, and the bandpass filter of the red spectral band of upper limit 660mm can provide precondition for improving signal to noise ratio (S/N ratio) and dynamic range from the influence of other non-measurement intense light sources of angle filtering to measuring of optics.Certainly, in other embodiments, yet can omit or select for use the optical filter of other types, present embodiment does not limit this.
Shown in Fig. 1 to Fig. 3, the slit light hurdle 30 of this preferred embodiment light source assembly cooperates with the bandpass filter 40 of sensor assembly, the opposed facing both lateral sides that places T type glass tube 1.So, the light source that from slit light hurdle 30, sends can pass bandpass filter 40 smoothly after passing transparent glass tube 1, be radiated on the photo-detector 41.
In this preferred embodiment; Adopted a plurality of transparent glass tubes to measure the perviousness of soil sample; The supporting light source assembly of each transparent glass tube and a sensor assembly; A plurality of sensor assemblies are realized and being connected of signal processor 5 through the MODBUS communications protocol, with the requirement of assurance hyperchannel and transmission reliability.The important process of signal processor 5 of the present invention comprises distribution and the control of accomplishing signal relay and PORT COM.As shown in Figure 3; In this preferred embodiment; Adopt the MODBUS agreement of the many slave modes of a main frame between sensor assembly 4 and the signal processor 5; Signal processor 5 carries out the standardization of information format after collecting data, at last through the RS232 agreement realization of standard and the data transmission between the computing machine 6.
In this preferred embodiment, the power supply of light source assembly and sensor assembly provides by signal processor 5.As shown in Figure 3, on same electricity network, there be the possible of large current load or strong interferers, be provided with power supply processing circuit 51 in the signal processor 5, power supply is done the processing in early stage.These processing mainly comprise the isolation and the LC filtering of power supply, thereby obtain relieved safe AC power.As shown in Figure 3; The power supply processing circuit 51 of AC power in signal processor 5 carries out after power supply such as rectifying and wave-filtering handles; Convert the light source assembly and the required voltage signal of sensor assembly of corresponding amplitude into, as the interface voltage of 12V ,+the communication voltage of 5V and+3.3V ,+core voltage of 1.8V or the like.Certainly in other embodiment, can dispense power supply processing circuit, present embodiment does not limit this yet.
As shown in Figure 4, the computing machine in this preferred embodiment 6 comprises communication module 61, main control module 62, memory module 63, interactive module 64 and external unit 65.
As shown in Figure 4, these data on the one hand can with the stored in form of database in memory module 63 that main control module 62 links to each other in, in order to calling later on and analyzing; On the other hand, these data are carried out flow process control through interactive module 64, accomplish to show and printing.
More than describe preferred embodiment of the present invention in detail.The ordinary skill that should be appreciated that this area need not creative work and just can design according to the present invention make many modifications and variation.Therefore, all technician in the art all should be in the determined protection domain by claims under this invention's idea on the basis of existing technology through the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (10)
1. a light controlling device of measuring the infiltration liquid level of soil sample is characterized in that, comprises open containers, transparent glass tube, T type conduit, light source assembly, sensor assembly, signal processor and computing machine;
Said transparent glass tube both ends open; Said T type conduit has first end, second end and the 3rd end, and said first end opening also is connected with transparent glass tube, said second end opening and vertical the insertion in the tested soil sample that holds in the said open containers, and said the 3rd end is provided with a valve; Fill transparency liquid in said transparent glass tube and the T type conduit;
Said light source assembly comprises modulation signal generator and linear light sources, and said modulation signal generator links to each other with linear light sources;
Said sensor assembly comprises photo-detector, prime amplifier, wave detector and digital signal processor, and said photo-detector links to each other with wave detector through prime amplifier, and said wave detector links to each other with digital signal processor;
Said linear light sources cooperates with said photo-detector, and the opposed facing both lateral sides that places said transparent glass tube is used to measure the liquid level of said transparency liquid;
Said signal processor comprises data input pin and data output end, and said data input pin links to each other with said digital signal processor, and said data output end links to each other with said computing machine.
2. the light controlling device of the infiltration liquid level of measurement soil sample as claimed in claim 1, wherein said transparency liquid are water.
3. the light controlling device of the infiltration liquid level of measurement soil sample as claimed in claim 1, wherein said modulation signal generator comprise high-speed mixing signal processor, sine wave generating circuit and phase coordination parts; Said high-speed mixing signal processor links to each other with the phase coordination parts through sine wave generating circuit, and said phase coordination parts link to each other with said linear light sources.
4. the light controlling device of the infiltration liquid level of measurement soil sample as claimed in claim 3; Wherein said linear light sources is a cathode fluorescent tube; Said modulation signal generator also comprises the high pressure energizing circuit, and said high-speed mixing signal processor links to each other with cathode fluorescent tube through the high pressure energizing circuit.
5. the light controlling device of the infiltration liquid level of measurement soil sample as claimed in claim 1; Wherein said light source assembly also comprises automatic power control circuitry; Said automatic power control circuitry comprises the average light current measurement circuit, and said automatic power control circuitry links to each other with said modulation signal generator.
6. the light controlling device of the infiltration liquid level of measurement soil sample as claimed in claim 1, wherein said light source assembly also comprise monochromatic ring and slit light hurdle.
7. the light controlling device of the infiltration liquid level of measurement soil sample as claimed in claim 1; Wherein said photo-detector is the semiconductor optoelectronic array; The pixel of said semiconductor optoelectronic array adopts the silicon photo-detector; Said sensor assembly also comprises bias box, and the sensor assembly power input links to each other with the semiconductor optoelectronic array through bias box.
8. the light controlling device of the infiltration liquid level of measurement soil sample as claimed in claim 1, wherein said wave detector are phase-sensitive detector (PSD), and said phase-sensitive detector (PSD) places the complex programmable logic controller.
9. the light controlling device of the infiltration liquid level of measurement soil sample as claimed in claim 6, wherein said photo-detector also comprises bandpass filter, said bandpass filter cooperates the opposed facing both lateral sides that places said transparent glass tube with said slit light hurdle.
10. the light controlling device of the infiltration liquid level of measurement soil sample as claimed in claim 1; Wherein said computing machine comprises communication module, main control module, memory module, interactive module and external unit; Said communication module links to each other with interactive module with memory module through main control module, and said interactive module links to each other with external unit.
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| CN2011100711866A CN102221391B (en) | 2011-03-23 | 2011-03-23 | Light controlling device for measuring penetrant level of soil sample |
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| CN2011100711866A CN102221391B (en) | 2011-03-23 | 2011-03-23 | Light controlling device for measuring penetrant level of soil sample |
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| CN102435540A (en) * | 2011-10-31 | 2012-05-02 | 河海大学 | Measurement system and method for permeability coefficient of shallow-layer sand soil |
| CN102494984A (en) * | 2011-12-08 | 2012-06-13 | 上海市城市建设设计研究总院 | Automatic soil sample penetration liquid level measurement device with water temperature sensor |
| CN103226090A (en) * | 2013-05-16 | 2013-07-31 | 上海市城市建设设计研究总院 | Light-operated wireless acquisition penetration test device |
| CN103217373B (en) * | 2013-05-16 | 2014-10-15 | 上海市城市建设设计研究总院 | Light-controlled pressurized rapid permeability test device |
| CN107091671B (en) * | 2017-06-28 | 2023-06-06 | 贵州航天智慧农业有限公司 | Linear liquid level sensor for detecting by utilizing illumination intensity |
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| CN2030319U (en) * | 1988-06-29 | 1989-01-04 | 左湘宁 | Double-colour glass-tube liquidometer |
| JPH02134519A (en) * | 1988-11-15 | 1990-05-23 | Mitsubishi Electric Corp | Liquid-level gage |
| CN201170740Y (en) * | 2008-03-25 | 2008-12-24 | 北京城市排水集团有限责任公司 | Visual gauge for mud location of clarifying basin |
| CN202002869U (en) * | 2011-03-23 | 2011-10-05 | 上海市城市建设设计研究院 | Light control device for measuring leakage liquid level of soil samples |
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