System and method for testing ion concentration of outlet water of tunnel blind pipe

Abstract

The invention provides a tunnel blind pipe effluent ion concentration test system and a test method, the system at least comprises a test device, a data analyzer and a digital acquisition instrument, the test device comprises an electrode sensor probe, the electrode sensor probe is used for being placed in a blind pipe water sample to convert a potential difference formed by the ion concentration into an electric signal; the data analyzer is in data connection with the electrode sensor probe, and the data analyzer is used for receiving the electric signals of the electrode sensor probe, performing data analysis, outputting corresponding current signals and storing the current signals; and the digital acquisition instrument is electrically connected with the data analyzer and is used for receiving the current signal of the data analyzer and transmitting the data to the client. Ion concentration data in water discharged by the tunnel blind pipe can be efficiently obtained in real time through a wireless system, operation is easy, control is convenient, and environmental adaptability is high.

Description

Technical Field

[0001] The invention relates to the technical field of water quality monitoring, and in particular to a testing system and a testing method for ion concentration of water outlet from a tunnel blind pipe. Background Art

[0002] With the rapid development of infrastructure construction, my country has made great achievements in tunnel engineering construction, but it has also brought about the problem of disease control in the process of tunnel operation and maintenance. Due to the differences in tunnel construction time, design standards, construction technology and traversing strata, some mountain tunnels will have problems with blind drainage pipes due to crystallization, blockage and failure in the later stages of construction or after they are put into operation, which weakens the drainage capacity of the tunnel drainage system and leads to tunnel circuit damage, equipment corrosion, lining structure leakage, frost heave cracking and other diseases. Due to the concealment of the tunnel drainage system, the drainage system disease information cannot be perceived in time during the construction and operation stages, and the diseases cannot be timely and effectively rectified. The blind pipe is an important part of the tunnel drainage system and the last channel for groundwater to enter the ditch. Its blockage state is of great significance to the normal operation of the entire tunnel drainage system.

[0003] Groundwater flows through the surrounding rock and enters the blind pipe after initial support, carrying a large amount of anions and cations, which produce complex physical and chemical reactions at the blind pipe mouth to form crystals. Ion concentration is an important factor affecting the formation of crystals. Therefore, real-time monitoring of ion concentration in blind pipe drainage is of great significance for obtaining the blind pipe blockage status. Summary of the invention

[0004] The purpose of the present invention is to provide a testing system and method for the ion concentration of water discharged from a tunnel blind pipe in view of the problems existing in the prior art. The testing system at least includes a testing device, a data analyzer and a digital acquisition instrument, wherein the testing device includes at least two electrode sensor probes, the electrode sensor probes are used to be placed in the blind pipe water sample to convert the potential difference formed by the ion concentration into an electrical signal; the data analyzer is data-connected to the electrode sensor probes, the data analyzer is used to receive the electrical signal of the electrode sensor probes and perform data analysis to output the corresponding current signal, and then store it; the digital acquisition instrument is electrically connected to the data analyzer, the digital acquisition instrument is used to receive the current signal of the data analyzer and transmit the data to the client. The present invention can efficiently and real-time obtain the ion concentration data in the water discharged from the tunnel blind pipe through a wireless system, is simple to operate, easy to control, and has high environmental adaptability.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A testing system for the ion concentration of water outlet from a tunnel blind pipe comprises at least a testing device, a data analyzer and a digital acquisition instrument;

[0007] The test device includes an electrode sensor probe, which is used to be placed in a blind pipe water sample to convert the potential difference formed by ion concentration into an electrical signal;

[0008] The data analyzer is connected to the electrode sensor probe, and is used to receive the electrical signal of the electrode sensor probe and perform data analysis to output the corresponding current signal, and then store it;

[0009] The digital collector is electrically connected to the data analyzer, and is used to receive the current signal of the data analyzer and transmit the data to the client.

[0010] The present invention provides a testing system for the ion concentration of water discharged from a tunnel blind pipe, which at least includes a testing device, a data analyzer and a digital acquisition instrument, wherein the testing device includes an electrode sensor probe, the electrode sensor probe is used to be placed in a blind pipe water sample to convert the potential difference formed by the ion concentration into an electrical signal; the data analyzer is data-connected to the electrode sensor probe, the data analyzer is used to receive the electrical signal of the electrode sensor probe and perform data analysis to output a corresponding current signal, and then store it; the digital acquisition instrument is electrically connected to the data analyzer, and the digital acquisition instrument is used to receive the current signal of the data analyzer and transmit the data to a client. The present invention can efficiently and real-timely obtain the ion concentration data in the water discharged from the tunnel blind pipe through a wireless system, provide scientific basis and data support for tunnel construction and operation units, help them reasonably manage and deal with tunnel water environment protection issues, and provide a simple and reliable way to effectively prevent and reduce tunnel blind pipe crystallization diseases.

[0011] Furthermore, in the data analyzer, the analysis and calculation of converting the electrical signal of ion concentration into the current signal is specifically as follows:

[0012] Formula 1, the corresponding relationship between the measured ion concentration value and the output current:

[0013]

[0014] In formula 1, I is the output current value corresponding to the ion concentration;

[0015] A—initial current output value;

[0016] K—interval current difference;

[0017] D—currently measured ion concentration value;

[0018] H—the ion concentration value corresponding to the set output upper limit current;

[0019] L—The ion concentration value corresponding to the set output lower limit current.

[0020] Furthermore, considering that the working environment in the tunnel is different from that on the ground, it is necessary to perform temperature correction on the current output. The correction formula is:

[0021] I′=A+K′t;

[0022] In formula 2, I′ is the output current value corresponding to the temperature;

[0023] A—initial current output value;

[0024] K′—correction coefficient;

[0025] t—Temperature value displayed by the secondary instrument.

[0026] Furthermore, the correction factor is 0.16.

[0027] Furthermore, the electrode sensor probe includes a sensor module and a signal processing circuit, and the sensor module and the signal processing circuit are electrically connected; or / and, the data analyzer includes a microcontroller module, and the microcontroller module includes an electrically connected controller and storage; or / and, the digital acquisition instrument includes a wireless communication module.

[0028] Furthermore, the controller is an STM32 controller.

[0029] Furthermore, the wireless communication module includes a wireless transmission network node chip CC2530.

[0030] Furthermore, the test device includes three electrode sensor probes, namely Ca 2+ Sensor probe, Mg 2+ Sensor probe and H + Sensor probe.

[0031] Furthermore, the test system also includes a power supply, which is electrically connected to the data analyzer and the digital acquisition instrument respectively.

[0032] Furthermore, the test system also includes a portable data collection and analysis box, in which the test device, data analyzer and data collector are arranged; the portable data collection and analysis box can be connected to the tunnel blind pipe drainage outlet.

[0033] The portable data collection and analysis box has a simple structure, is easy to carry, and is suitable for the poor working environment inside the tunnel.

[0034] Furthermore, a flow cell is provided in the portable collection and analysis box, and the flow cell can receive the blind-pipe water sample and discharge the blind-pipe water sample out of the portable collection and analysis box;

[0035] At least two electrode sensor probes are arranged on the circulation pool at intervals and can contact with the blind-leg water sample in the circulation pool.

[0036] The blind-pipe water is led out and filtered into a circulation pool for testing, overcoming the shortcoming that traditional groundwater monitoring components cannot be applied to blind-pipe water monitoring in tunnels.

[0037] Furthermore, holes are arranged at intervals on the top of the circulation pool, and the electrode sensor probe can be inserted into the hole to be fixed and contact with the blind pipe water sample in the circulation pool.

[0038] Furthermore, the test system also includes a drainage device, which is used to be connected to the tunnel blind pipe drainage outlet and the portable collection and analysis box respectively;

[0039] A filtering structure is provided in the drainage device to filter out impurities in the water outlet of the tunnel blind pipe.

[0040] On the one hand, the drainage device can facilitate the installation of the portable collection and analysis box, and on the other hand, it can effectively remove impurities in the water sample, making the test result more accurate.

[0041] Another object of the present invention is to provide a method for testing the ion concentration of a water sample using the above-mentioned testing system.

[0042] The above-mentioned test system performs a test method for the ion concentration of water outlet of a tunnel blind pipe, comprising the following steps:

[0043] Select a monitoring point at the blind pipe drainage outlet of the tunnel, fix the sensor probe and make it contact with the blind pipe water sample;

[0044] The electrode sensor probe is connected to the data analyzer for data connection;

[0045] The data analyzer is electrically connected to the digital acquisition instrument;

[0046] After the water outflow from the drainage outlet of the tunnel blind pipe is stable, turn on the power and test the system operation.

[0047] The present invention provides a method for testing the ion concentration of water outlet of a tunnel blind pipe, comprising selecting a monitoring point at a drainage outlet of the tunnel blind pipe, fixing a sensor probe and contacting the sensor probe with a water sample of the blind pipe; connecting the sensor probe to a data analyzer; connecting the data analyzer to a digital acquisition instrument; and after the water outlet of the drainage outlet of the tunnel blind pipe is stable, turning on the power supply and running the test system. The test method is simple to operate, easy to control, can monitor the ion concentration of water outlet of the blind pipe in real time, and has high environmental adaptability.

[0048] Furthermore, the method for testing the ion concentration of water outlet from a tunnel blind pipe further includes the following steps:

[0049] Select a monitoring point at the blind pipe drainage outlet of the tunnel, connect it to the portable collection and analysis box through the drainage device, let the blind pipe water sample flow into the circulation pool, fix the sensor probe on the circulation pool, and contact it with the blind pipe water sample.

[0050] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0051] 1. The present invention provides a testing system for the ion concentration of water discharged from a tunnel blind pipe, which at least includes a testing device, a data analyzer and a digital acquisition instrument, wherein the testing device includes an electrode sensor probe, which is used to be placed in a blind pipe water sample to convert the potential difference formed by the ion concentration into an electrical signal; the data analyzer is data-connected to the electrode sensor probe, which is used to receive the electrical signal of the electrode sensor probe and perform data analysis to output a corresponding current signal, and then store it; the digital acquisition instrument is electrically connected to the data analyzer, which is used to receive the current signal of the data analyzer and transmit the data to a client. The present invention can efficiently and real-timely obtain the ion concentration data in the water discharged from the tunnel blind pipe through a wireless system, provide scientific basis and data support for tunnel construction and operation units, help them reasonably manage and deal with tunnel water environment protection issues, and provide a simple and reliable way to effectively prevent and reduce tunnel blind pipe crystallization diseases.

[0052] 2. The present invention provides a method for testing the ion concentration of water outlet from a tunnel blind pipe, including selecting a monitoring point at the drainage outlet of the tunnel blind pipe, fixing a sensor probe and contacting it with a water sample from the blind pipe; connecting the sensor probe to a data analyzer; connecting the data analyzer to a digital acquisition instrument; and turning on the power supply after the water outlet of the drainage outlet of the tunnel blind pipe is stable, and running the test system. The test method is simple to operate, easy to control, can monitor the ion concentration of water outlet from the blind pipe in real time, and has high environmental adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a structural schematic diagram of the portable collection and analysis box of the present invention.

[0054] Figure 2 This is a schematic diagram of data flow in the test system of the present invention.

[0055] Figure 3 It is a schematic diagram of the structure of the drainage device of the present invention.

[0056] Figure 4 This is a structural schematic diagram of the blind pipe monitoring point connected to the automatic data collection and analysis box of the present invention.

[0057] Figure 5 This is the curve of the client ion concentration changing with time for this application.

[0058] Icons: 100-tunnel blind pipe; 1-test device; 11-electrode sensor probe; 2-data analyzer; 3-digital data acquisition instrument; 4-power supply; 5-portable data acquisition and analysis box; 51-circulation cell; 6-drainage device; 61-filter rod; 611-coarse filter; 612-fine filter; 62-connector. DETAILED DESCRIPTION

[0059] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0060] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0061] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0062] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding devices / components / elements are within the error / deviation range, they can still achieve their functions in the scheme of the present invention.

[0063] In addition, the expressions “first”, “second”, “third”, etc. that appear in the terms are merely descriptions used to distinguish the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0064] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0065] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0066] Example

[0067] like Figure 1-5 As shown, a test system for the ion concentration of water outflowing from a tunnel blind pipe 100 includes a test device 1, a data analyzer 2 and a digital acquisition device 3; the test device 1 includes an electrode sensor probe 11, which is used to be placed in a blind pipe water sample to convert the potential difference formed by the ion concentration into an electrical signal; the data analyzer 2 is data-connected to the electrode sensor probe 11, and the data analyzer 2 is used to receive the electrical signal of the electrode sensor probe 11 and perform data analysis to output a corresponding current signal, and then store it; the digital acquisition device 3 is electrically connected to the data analyzer 2, and the digital acquisition device 3 is used to receive the current signal of the data analyzer 2 and transmit the data to the client. Preferably, the test system also includes a power supply 4, which is electrically connected to the data analyzer 2 and the digital acquisition device 3, respectively.

[0068] In some embodiments, the test system further comprises a portable collection and analysis box 5, in which the test device 1, the data analyzer 2 and the data collector 3 are arranged; the portable collection and analysis box 5 can be connected to the drainage port of the tunnel blind pipe 100. Preferably, a flow cell 51 is arranged in the portable collection and analysis box 5, and the flow cell 51 can receive the blind pipe water sample and discharge the blind pipe water sample out of the portable collection and analysis box 5; at least two electrode sensor probes 11 are arranged on the flow cell 51 at intervals and can contact the blind pipe water sample in the flow cell 51.

[0069] Preferably, holes are arranged at intervals on the top of the circulation pool 51 , and the electrode sensor probe 11 can be inserted into the holes to be fixed and contact with the blind tube water sample in the circulation pool 51 .

[0070] In some embodiments, the test system further includes a drainage device 6, which is used to be connected to the drainage outlet of the tunnel blind pipe 100 and the portable collection and analysis box 5 respectively; a filtering structure is provided in the drainage device 6 to filter out impurities in the water outlet of the tunnel blind pipe 100.

[0071] The present invention can efficiently and real-timely obtain the ion concentration data in the water discharged from the tunnel blind pipe through the wireless system, provide scientific basis and data support for tunnel construction and operation units, help them reasonably manage and deal with tunnel water environment protection issues, and provide a simple and reliable way to effectively prevent and reduce tunnel blind pipe crystallization diseases.

[0072] In some embodiments, the electrode sensor probe 11 includes a sensor module and a signal processing circuit, and the sensor module and the signal processing circuit are electrically connected; or / and, the data analyzer 2 includes a microcontroller module, and the microcontroller module includes an electrically connected controller and storage; or / and, the digital acquisition instrument 3 includes a wireless communication module. Preferably, the controller is an STM32 controller. Preferably, the wireless communication module includes a wireless transmission network node chip CC2530.

[0073] In some embodiments, the testing device 1 includes three electrode sensor probes 11, namely, Ca 2+ Sensor probe, Mg 2+ Sensor probe and H + Sensor probe.

[0074] like Figure 1 and Figure 2 As shown, the test system is divided into four structures: drainage device 6, test device 1, data analyzer 2, and digital acquisition instrument 3. The three structures are integrated together to form a portable collection and analysis box 5. The connection between each structure is simple and reliable, safe and stable. The device can realize one-stop monitoring of drainage ions in tunnel blind pipes 100. The flow of test data in the system is: data acquisition (electrode sensor probe 1) → data analyzer 2 (microcontroller module) → wireless communication module. The sensor module is responsible for collecting test data and selecting Ca2+, which has the greatest impact on tunnel crystals. 2+ Mg 2+ The microcontroller module is responsible for data analysis and storage, and the wireless communication module transmits data to the client, where STM32 is the single-chip microcomputer and CC2530 is the network node chip for wireless transmission.

[0075] A method for testing the ion concentration of a water sample using the above-mentioned testing system.

[0076] The above-mentioned test system performs a test method for the ion concentration of water outlet of a tunnel blind pipe, comprising the following steps:

[0077] A monitoring point is selected at the drainage outlet of the tunnel blind pipe 100, and connected to the portable collection and analysis box 5 through the drainage device 6. The blind pipe water sample flows into the circulation pool 51, and the electrode sensor probe is fixed on the circulation pool and contacts with the blind pipe water sample;

[0078] The electrode sensor probe 11 is data-connected to the data analyzer 2;

[0079] The data analyzer 2 is electrically connected to the digital acquisition instrument 3;

[0080] When the water outflow from the drainage outlet of the tunnel blind pipe 100 is stable, the power supply 4 is turned on to test the system operation.

[0081] In some embodiments, the output current calculation in the data analyzer 2 is as follows: the electrode sensor probe 11 placed in the blind pipe water sample converts the potential difference formed by the ion concentration into an electrical signal and transmits it to the data analyzer 2. After calculation, the data analyzer 2 outputs the corresponding current signal. The corresponding relationship between the measured ion concentration value and the output current is as follows:

[0082]

[0083] Where: I—output current value corresponding to ion concentration (mA);

[0084] A—initial current output value 4mA;

[0085] K—interval current difference 16mA;

[0086] D—currently measured ion concentration value;

[0087] H—the ion concentration value corresponding to the set 20mA current, that is, the output upper limit;

[0088] L—The ion concentration value corresponding to the set 4mA current, that is, the output lower limit.

[0089] Considering that the working environment in the tunnel is different from that on the ground, it is necessary to perform temperature correction on the current output. The correction formula is:

[0090] I′=A+K′t;

[0091] Where: I′—output current value corresponding to temperature;

[0092] A—initial current output value 4mA;

[0093] K′—correction coefficient, generally 0.16;

[0094] t—Temperature value displayed by the secondary instrument, 0℃ corresponds to 4.00mA, 100℃ corresponds to 20.00mA.

[0095] Specifically, in some embodiments, the testing process of the entire system is as follows:

[0096] (1) Figure 4As shown, a monitoring point is selected at the drainage outlet of the tunnel blind pipe 100, and connected to the portable collection and analysis box 5 through the drainage device 6. The blind pipe water sample flows into the portable collection and analysis box 5, and the water is analyzed by the internal instrument and then discharged into the tunnel ditch through the outlet of the portable collection and analysis box 5. Figure 3 As shown, a replaceable filter rod 61 is provided in the drainage device 6, and joints 62 with sealing rings are provided at both ends of the drainage device 6. The filter rod 61 is 20 cm long and has a pipe diameter of 4 cm. A coarse filter 611 with a specification of 40 mesh is provided in the filter rod 61, which can filter fine sediment particles in the blind pipe drainage; and a fine filter 612 with a specification of 80 mesh can filter the suspended matter of the waterproof board geotextile filaments in the blind pipe drainage. One end of the drainage device 6 is connected to the blind pipe drainage end with a joint, and the other end is connected to the water pipe connected to the circulation pool 51.

[0097] (2) After being filtered, the blind pipe water enters the circulation pool 51. The inlet of the circulation pool 51 is at the lower left, and the outlet is at the upper left. Three independent electrode sensor probes 11 are set in the middle to test the Ca in the water. 2+ Mg 2+ The probe data is transmitted to the controller after signal processing to form a data curve that changes over time.

[0098] In some embodiments, the circulation pool 51 uses a plexiglass shell to clearly display the internal water flow state, so that the water sample and the electrode are in a sealed state to form a complete shield.

[0099] (3) Insert the electrode sensor probe 11 into the hole of the flow cell 51 and connect it to the data analyzer 2 with a data cable. When the water discharge at the outlet is stable, the device can be operated after the power supply 4 is turned on.

[0100] (4) The electrode sensor probe 11 transmits the test signal to the data analyzer 2, which outputs the corresponding ion data on the screen after program calculation. At the same time, the data is transmitted to the digital data collector 3 with wireless transmission function, and the data is uploaded to the client. The curve of ion concentration changing with time can be viewed in real time on the mobile phone or PC. Figure 5 shown.

[0101] Nernst equation

[0102] The Nernst equation is an equation expression used to quantitatively describe the diffusion potential of a certain ion between two systems A and B. In electrochemistry, the Nernst equation is used to calculate the equilibrium voltage of a specified redox pair on an electrode relative to the standard potential. It can be applied to the change in electrode potential when the ion concentration changes. This equation can be used to test the change in ion concentration in blind-leg drainage. Assume that the relationship between the potential E and the ion activity ai measured in the blind-leg drainage can be expressed as follows using the Nernst mathematical method:

[0103]

[0104] Where: E0 is the constant potential difference when each ion selective electrode is combined with a specific reference;

[0105] R is the gas constant, take 8.314JK -1 mol -1 ;

[0106] T is the absolute temperature K;

[0107] F is the Faraday equivalent, which is 9.6487x10 4 Cmol -1 ;

[0108] Z i is the charge number of the measured ion, which can be divided into monovalent ions (Na + :Z i = +1) and divalent ions (Ca 2+ ,

[0109] Mg 2+ etc.: Z i = +2. );

[0110] The activity of an ai ion is equal to the ion concentration in a dilute solution.

[0111] is the slope of the Nernst equation, which is 59.16 mV / Z at 25°C i .

[0112] The Nernst equation establishes a relationship between ion concentration and test potential E, and potential E can be measured by designing electrodes. Relatively insoluble inorganic salts are used in the solid electrode membrane. Solid electrodes exist in homogeneous and heterogeneous forms. Both types form potential E on the membrane due to the ion exchange process. The accuracy and stability of the electrode are one of the key factors that determine the quality of the test data. In particular, the low conductivity water quality in the tunnel blind pipe has higher requirements for the electrode. If ordinary electrodes are used for measurement, the stability is very poor and the service life is short, which cannot meet the requirements.

[0113] The electrode sensor probe 11 is an electrochemical sensor based on a sensitive membrane. This membrane is a component that enables the electrode to selectively respond to specific ions. According to the different materials of the membrane, ion selective electrodes can be divided into four types: glass membrane (such as Na + ), solid film (such as Pb 2+ ), polymer membranes (such as K + ), gas permeable membrane (such as CO2). According to the test data of tunnel blind tube 100 crystals, Ca 2+is the main cation that forms the main crystal, so the electrode with polymer membrane is selected as Ca 2+ When the electrode is placed in a solution, a potential difference is formed on the membrane. When the concentration of the ion to be measured in the sample changes, the change in this potential difference can be measured by using the ion selective electrode together with the built-in reference electrode.

[0114] The test method is simple to operate and easy to control, can monitor the ion concentration of the blind pipe outlet water in real time, and has high environmental adaptability.

[0115] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A testing system for the ion concentration of water outlet from a tunnel blind pipe, characterized in that: At least including test equipment, data analyzer and digital acquisition instrument; The test device includes an electrode sensor probe, which is used to be placed in a blind pipe water sample to convert the potential difference formed by ion concentration into an electrical signal; The data analyzer is connected to the electrode sensor probe, and is used to receive the electrical signal of the electrode sensor probe and perform data analysis to output the corresponding current signal, and then store it; The digital collector is electrically connected to the data analyzer, and is used to receive the current signal of the data analyzer and transmit the data to the client.

2. The testing system for the ion concentration of water outlet from a tunnel blind pipe according to claim 1 is characterized in that: In the data analyzer, the analysis and calculation of converting the electrical signal of ion concentration into the current signal is as follows: Formula 1, the corresponding relationship between the measured ion concentration value and the output current: In formula 1, I is the output current value corresponding to the ion concentration; A—initial current output value; K—interval current difference; D—currently measured ion concentration value; H—the ion concentration value corresponding to the set output upper limit current; L—The ion concentration value corresponding to the set output lower limit current.

3. The testing system for the ion concentration of water outlet from a tunnel blind pipe according to claim 1 is characterized in that: The electrode sensor probe includes a sensor module and a signal processing circuit, and the sensor module and the signal processing circuit are electrically connected; or / and, the data analyzer includes a microcontroller module, and the microcontroller module includes an electrically connected controller and storage; or / and, the digital acquisition instrument includes a wireless communication module.

4. The testing system for the ion concentration of water outlet from a tunnel blind pipe according to claim 1 is characterized in that: The test apparatus includes three electrode sensor probes, namely Ca 2+ Sensor probe, Mg 2+ Sensor probe and H + Sensor probe.

5. The testing system for the ion concentration of water outlet from a tunnel blind pipe according to claim 1 is characterized in that: The test system also includes a power supply, which is electrically connected to the data analyzer and the digital acquisition instrument respectively.

6. The testing system for ion concentration of water outlet from a tunnel blind pipe according to any one of claims 1 to 5, characterized in that: The test system also includes a portable data collection and analysis box, in which the test device, the data analyzer and the data collector are arranged; the portable data collection and analysis box can be connected to the tunnel blind pipe drainage outlet.

7. The testing system for the ion concentration of water outlet from a tunnel blind pipe according to claim 6 is characterized in that: A flow cell is provided in the portable collection and analysis box, and the flow cell can receive the blind-pipe water sample and discharge the blind-pipe water sample out of the portable collection and analysis box; At least two electrode sensor probes are arranged on the circulation pool at intervals and can contact with the blind-leg water sample in the circulation pool.

8. The testing system for the ion concentration of water outlet from a tunnel blind pipe according to claim 7, characterized in that: The top of the circulation pool is provided with holes at intervals, and the electrode sensor probe can be inserted into the holes and fixed to contact with the blind pipe water sample in the circulation pool.

9. The testing system for the ion concentration of water outlet from a tunnel blind pipe according to claim 8, characterized in that: The test system also includes a drainage device, which is used to be connected to the tunnel blind pipe drainage outlet and the portable collection and analysis box respectively; A filtering structure is provided in the drainage device to filter out impurities in the water outlet of the tunnel blind pipe.

10. A method for testing the ion concentration of water outlet from a tunnel blind pipe using the testing system according to any one of claims 1 to 8, characterized in that: The following steps are involved: Select a monitoring point at the blind pipe drainage outlet of the tunnel, fix the sensor probe and make it contact with the blind pipe water sample; The electrode sensor probe is connected to the data analyzer for data connection; The data analyzer is electrically connected to the digital acquisition instrument; After the water outflow from the drainage outlet of the tunnel blind pipe is stable, turn on the power and test the system operation.

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