CN202002869U - Light control device for measuring leakage liquid level of soil samples - Google Patents
Light control device for measuring leakage liquid level of soil samples Download PDFInfo
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- CN202002869U CN202002869U CN2011200797487U CN201120079748U CN202002869U CN 202002869 U CN202002869 U CN 202002869U CN 2011200797487 U CN2011200797487 U CN 2011200797487U CN 201120079748 U CN201120079748 U CN 201120079748U CN 202002869 U CN202002869 U CN 202002869U
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Abstract
The utility model discloses a light control device for measuring the leakage liquid level of soil samples, which comprises a transparent glass pipe, a T-shaped catheter, an opening container, a light source assembly, a sensor module, a signal processing machine and a computer, wherein the T-shaped catheter is vertically inserted into the opening container, the light source assembly 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 are arranged at both sides of the transparent glass pipe in the transverse direction in a mutually facing way, the signal processing machine comprises a data input end and a data output end, the data input end is connected with the digital signal processor, and the data output end is connected with the computer. The light control device overcomes the defects that the reading of liquid level observation through eyes of people is not precise, and the real-time measurement can not be realized. The light control device belongs to an electronic measuring device for fully automatically measuring the leakage liquid level of the soil samples.
Description
Technical field
The utility model relates to light controlling device, relates 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 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 finish by 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 by liquid level in people's visual inspection transparent glass tube, utilizes the reference mark that manually reads on the transparent glass tube.This metering system inevitably have the error of vision, measurement result can vary with each individual; Also can't finish dynamically in good time measurement accurately; Running into task survey crew consuming time may 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.
The utility model content
Because the above-mentioned defective of prior art, the purpose of this utility model provides a kind of light controlling device of infiltration liquid level of measurement soil sample of full-automation.
For achieving the above object, the utility model provides a kind of light controlling device of measuring the infiltration liquid level of soil sample, comprises open containers, transparent glass tube, T type conduit, light source assembly, sensor assembly, signal processor and computing machine;
Described transparent glass tube both ends open; Described T type conduit has first end, second end and the 3rd end, and described first end opening also is connected with transparent glass tube, described second end opening and vertical the insertion in the tested soil sample that holds in the described open containers, and described the 3rd end is provided with a valve; Fill transparency liquid in described transparent glass tube and the T type conduit;
Described light source assembly comprises modulation signal generator and linear light sources, and described modulation signal generator links to each other with linear light sources;
Described sensor assembly comprises photo-detector, prime amplifier, wave detector and digital signal processor, and described photo-detector links to each other with wave detector by prime amplifier, and described wave detector links to each other with digital signal processor;
Described linear light sources cooperates with described photo-detector, and the opposed facing both lateral sides that places described transparent glass tube is used to measure the liquid level of described transparency liquid;
Described signal processor comprises data input pin and data output end, and described data input pin links to each other with described digital signal processor, and described data output end links to each other with described computing machine.
In better embodiment of the present utility model, wherein said transparency liquid is a water.
In another better embodiment of the present utility model, wherein said modulation signal generator comprises high-speed mixing signal processor, sine wave generating circuit and phase coordination parts; Described high-speed mixing signal processor links to each other with the phase coordination parts by sine wave generating circuit, and described phase coordination parts link to each other with described linear light sources.
In another better embodiment of the present utility model, wherein said linear light sources is a cathode fluorescent tube, described modulation signal generator also comprises the high pressure energizing circuit, and described high-speed mixing signal processor links to each other with cathode fluorescent tube by the high pressure energizing circuit.
In another better embodiment of the present utility model, wherein said light source assembly also comprises automatic power control circuitry, described automatic power control circuitry comprises the average light current measurement circuit, and described automatic power control circuitry links to each other with described modulation signal generator.
In another better embodiment of the present utility model, wherein said light source assembly also comprises monochromatic ring and slit light hurdle.
In another better embodiment of the present utility model, wherein said photo-detector is the semiconductor optoelectronic array, the pixel of described semiconductor optoelectronic array adopts the silicon photo-detector, described sensor assembly also comprises bias box, and the sensor assembly power input links to each other with the semiconductor optoelectronic array by bias box.
In another better embodiment of the present utility model, wherein said wave detector is a phase-sensitive detector (PSD), and described phase-sensitive detector (PSD) places the complex programmable logic controller.
In another better embodiment of the present utility model, wherein said photo-detector also comprises bandpass filter, and described bandpass filter cooperates the opposed facing both lateral sides that places described transparent glass tube with described slit light hurdle.
In another better embodiment of the present utility model, wherein said computing machine comprises communication module, main control module, memory module, interactive module and external unit, described communication module links to each other with interactive module with memory module by main control module, and described 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 utility model adopts the photoelectricity non-contact measurement, finishes the measurement of precise and high efficiency in 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 finish full-automatic high efficiency measuring task.
Be described further below with reference to the technique effect of accompanying drawing, to understand the purpose of this utility model, feature and effect fully design of the present utility model, concrete structure and generation.
Description of drawings
Fig. 1 is the system architecture synoptic diagram of a preferred embodiment of the present utility model;
Fig. 2 is the structural representation of the light source assembly of a preferred embodiment of the present utility model;
Fig. 3 is the structural representation of the sensor assembly of a preferred embodiment of the present utility model;
Fig. 4 is the structural representation of the computing machine of a preferred embodiment of the present utility model.
Embodiment
As shown in Figure 1, in preferred embodiment of the present utility model, 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 by 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 utility model by 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 enters 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 utility model thereby fall that can be by reading this liquid level also and then calculates the perviousness of soil sample.
The utility model is used the parts of the light controlling devices such as light source assembly that place the transparent glass tube both lateral sides and is finished reading of full automatic measurement data.As shown in fig. 1, after the light source assembly in the present embodiment 3 is connected supply power, can start inner modulation signal generator 31 and linear light sources 32, 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 obtains useful liquid level data signal after the conditioning of prime amplifier 42, wave detector 43 and the digital signal processor 44 of sensor assembly 4 and demodulation.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 light-operated technology of utilizing the utility model reads the liquid level on the transparent glass tube, has improved the reading accuracy, and measurement that can dynamic real-time, thereby can finish full-automatic high efficiency measuring task.
As shown in fig. 1, the form that the utility model 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 mentioned above, in the utility model, 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 make the linear pattern of direct contain fluid, can read as long as can hold transparency liquid and have scale; In addition, in order accurately and 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 utility model.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 by 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 the dynamic conversion of APC circuit 37, 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 and have been changed the measuring error of bringing.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 by 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 utility model 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 by bias box 45, and bias box 45 is used to the PIN photovoltaic array that the 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 be converted to current signal with luminous energy.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, is converted into voltage signal behind prime amplifier 42.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 in this preferred embodiment 43 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 finish linear demarcation and linear fit, thereby obtain actual level value.
Shown in Fig. 3, the level value of digital signal processor (DSP) 44 reality that drawn is realized data transmission by the mode of digital communication with signal processor 5.
In addition, as shown in FIG. 3, comprise bandpass filter 40 in the sensor assembly 4, bandpass filter be used to the to decay various compositions of visible light.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.
As 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 sends from slit light hurdle 30 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 by the MODBUS communications protocol, with the requirement of assurance hyperchannel and transmission reliability.The important process of signal processor 5 of the present utility model comprises distribution and the control of finishing 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 by 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, be converted to the light source assembly and the required voltage signal of sensor assembly of corresponding amplitude, 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 can be stored in the form of database in the memory module 63 that links to each other with main control module 62 on the one hand, in order to calling later on and analyzing; On the other hand, these data are carried out flow process control by interactive module 64, finish to show and printing.
More than describe preferred embodiment of the present utility model in detail.The ordinary skill that should be appreciated that this area need not creative work and just can make many modifications and variations according to design of the present utility model.Therefore, all technician in the art comply with design of the present utility model on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be in the determined protection domain by claims.
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;
Described transparent glass tube both ends open; Described T type conduit has first end, second end and the 3rd end, and described first end opening also is connected with transparent glass tube, described second end opening and vertical the insertion in the tested soil sample that holds in the described open containers, and described the 3rd end is provided with a valve; Fill transparency liquid in described transparent glass tube and the T type conduit;
Described light source assembly comprises modulation signal generator and linear light sources, and described modulation signal generator links to each other with linear light sources;
Described sensor assembly comprises photo-detector, prime amplifier, wave detector and digital signal processor, institute
State photo-detector and link to each other with wave detector by prime amplifier, described wave detector links to each other with digital signal processor;
Described linear light sources cooperates with described photo-detector, the opposed facing both lateral sides that places described transparent glass tube;
Described signal processor comprises data input pin and data output end, and described data input pin links to each other with described digital signal processor, and described data output end links to each other with described 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; Described high-speed mixing signal processor links to each other with the phase coordination parts by sine wave generating circuit, and described phase coordination parts link to each other with described 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, described modulation signal generator also comprises the high pressure energizing circuit, and described high-speed mixing signal processor links to each other with cathode fluorescent tube by 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, described automatic power control circuitry comprises the average light current measurement circuit, and described automatic power control circuitry links to each other with described 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 described semiconductor optoelectronic array adopts the silicon photo-detector, described sensor assembly also comprises bias box, and the sensor assembly power input links to each other with the semiconductor optoelectronic array by 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 described phase-sensitive detector (PSD) places the complex programmable logic controller.
9. as the light controlling device of the infiltration liquid level of claim 1 or 6 described measurement soil samples, wherein said photo-detector also comprises bandpass filter, and described bandpass filter cooperates the opposed facing both lateral sides that places described transparent glass tube with described 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, described communication module links to each other with interactive module with memory module by main control module, and described interactive module links to each other with external unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011200797487U CN202002869U (en) | 2011-03-23 | 2011-03-23 | Light control device for measuring leakage liquid level of soil samples |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011200797487U CN202002869U (en) | 2011-03-23 | 2011-03-23 | Light control device for measuring leakage liquid level of soil samples |
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| CN202002869U true CN202002869U (en) | 2011-10-05 |
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| CN2011200797487U Expired - Lifetime CN202002869U (en) | 2011-03-23 | 2011-03-23 | Light control device for measuring leakage liquid level of soil samples |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221391A (en) * | 2011-03-23 | 2011-10-19 | 上海市城市建设设计研究院 | Light controlling device for measuring penetrant level of soil sample |
| CN102435540A (en) * | 2011-10-31 | 2012-05-02 | 河海大学 | Measurement system and method for permeability coefficient of shallow-layer sand soil |
| CN102519858A (en) * | 2011-12-26 | 2012-06-27 | 上海市城市建设设计研究总院 | Interval type light control device for measuring soil sample penetrating fluid level |
| CN102519857A (en) * | 2011-12-26 | 2012-06-27 | 上海市城市建设设计研究总院 | Movable light control device for measuring soil sample penetrating fluid level |
| CN102661774A (en) * | 2012-05-07 | 2012-09-12 | 青岛海诺测控有限公司 | Oil tank liquid level measurement instrument |
| CN106489071A (en) * | 2014-07-09 | 2017-03-08 | 帕雷科技有限公司 | Method for measuring the infiltration of the penetrant by film |
| CN111208047A (en) * | 2020-01-10 | 2020-05-29 | 中国矿业大学 | Test method capable of simulating permeability of fractured rock mass under complex disturbance condition |
| CN113634027A (en) * | 2021-07-04 | 2021-11-12 | 林哲鑫 | Suction filtration experimental device and method |
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2011
- 2011-03-23 CN CN2011200797487U patent/CN202002869U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221391A (en) * | 2011-03-23 | 2011-10-19 | 上海市城市建设设计研究院 | Light controlling device for measuring penetrant level of soil sample |
| CN102435540A (en) * | 2011-10-31 | 2012-05-02 | 河海大学 | Measurement system and method for permeability coefficient of shallow-layer sand soil |
| CN102519858A (en) * | 2011-12-26 | 2012-06-27 | 上海市城市建设设计研究总院 | Interval type light control device for measuring soil sample penetrating fluid level |
| CN102519857A (en) * | 2011-12-26 | 2012-06-27 | 上海市城市建设设计研究总院 | Movable light control device for measuring soil sample penetrating fluid level |
| CN102661774A (en) * | 2012-05-07 | 2012-09-12 | 青岛海诺测控有限公司 | Oil tank liquid level measurement instrument |
| CN106489071A (en) * | 2014-07-09 | 2017-03-08 | 帕雷科技有限公司 | Method for measuring the infiltration of the penetrant by film |
| CN106489071B (en) * | 2014-07-09 | 2019-06-04 | 帕雷科技有限公司 | For measuring the method for passing through the infiltration of penetrant of film |
| CN111208047A (en) * | 2020-01-10 | 2020-05-29 | 中国矿业大学 | Test method capable of simulating permeability of fractured rock mass under complex disturbance condition |
| CN113634027A (en) * | 2021-07-04 | 2021-11-12 | 林哲鑫 | Suction filtration experimental device and method |
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