A method, apparatus, equipment, and medium for detecting basic parameters of urea solution.

Abstract

This invention discloses a method, apparatus, equipment, and medium for detecting basic parameters of urea solution, relating to the field of urea detection technology. The method includes: acquiring basic parameters of the urea solution, wherein the basic parameters include at least one of urea solution concentration, urea solution temperature, and urea solution level; and determining whether the urea solution is qualified based on preset parameter thresholds and the basic parameters. This invention can quickly and accurately automatically detect the basic parameters of urea solution, including urea solution concentration, urea solution temperature, and urea solution level, greatly improving the detection efficiency and stability of urea solution, facilitating subsequent improvement of emission quality.

Description

Technical Field

[0001] This invention relates to the field of urea detection technology, specifically to a method, apparatus, equipment, and medium for detecting basic parameters of urea solution. Background Technology

[0002] To prevent pollution from diesel engines used in non-road mobile machinery and improve ambient air quality, the current requirement is that the exhaust emissions from diesel engines used in non-road mobile machinery (such as explosion-proof diesel engines) must meet the "Emission Limits and Measurement Methods for Exhaust Pollutants from Diesel Engines Used in Non-road Mobile Machinery (China Stage III)". The emission standards do not have high requirements for nitrogen oxide emissions, but with the further development of the coal industry, the emission standards for exhaust pollutants from diesel engines used in non-road mobile machinery will be further improved.

[0003] Taking explosion-proof diesel engines as an example, particulate matter (PM), carbon monoxide (CO), and nitrogen oxides (NOx) are the main pollutants in their exhaust. Selective catalytic reduction (SCR) is the mainstream method for eliminating NOx. Urea solution, used in automotive applications, acts as a catalyst in SCR, primarily reducing NOx to harmless nitrogen and water, thereby improving the quality of emissions from explosion-proof diesel engines. If explosion-proof diesel engines do not use urea solution or if the concentration of the urea solution used is not up to standard, it will damage the catalytic converter used in the SCR, causing abnormal engine operation and further environmental pollution. This is especially problematic in coal mines, where such issues would place a significant burden on mine safety. Furthermore, if parameters such as urea solution temperature and level meet technical requirements, emission quality can also be improved. Therefore, the detection of basic parameters of automotive urea solution is crucial for improving the quality of exhaust pollutants from diesel engines used in non-road mobile machinery. However, current methods for detecting basic parameters of urea solutions suffer from drawbacks such as cumbersome operation, low detection efficiency, and low detection stability. Summary of the Invention

[0004] The technical problem this invention aims to solve is that existing methods for detecting the basic parameters of urea solutions are cumbersome, have low detection efficiency and stability. To address this problem, this invention provides a method, apparatus, equipment, and medium for detecting the basic parameters of urea solutions.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0006] A method for detecting basic parameters of urea solution, comprising:

[0007] Step S1: Obtain the basic parameters of the urea solution, including at least one of the following: urea solution concentration, urea solution temperature, and urea solution level.

[0008] Step S2: Determine whether the urea solution is qualified based on the preset parameter threshold and the basic parameters.

[0009] The beneficial effects of this invention are: this method can quickly and accurately detect the basic parameters of urea solution, including urea solution concentration, urea solution temperature and urea solution level, which greatly improves the detection efficiency and stability of urea solution and lays the foundation for ensuring that the quality of emissions meets the standards; by determining whether the various parameters of urea solution are qualified, subsequent processing is facilitated.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, the above methods also include:

[0012] Step S3: If the urea solution is substandard, an alarm message is generated based on the basic parameters, and the alarm message is displayed and / or played in audio format.

[0013] The beneficial effects of adopting the above-mentioned further solutions are: when the urea solution concentration is not up to standard, an alarm will be triggered in a timely manner to remind the user to take appropriate measures, thereby avoiding the failure of selective catalytic reduction, which would lead to excessive nitrogen oxide emissions and adverse effects on in-vehicle equipment, human beings and the environment; when the urea solution temperature or urea solution level is not up to standard, an alarm will be triggered in a timely manner to remind the user to take appropriate measures, thereby improving the quality of emissions.

[0014] Furthermore, if the basic parameters include the urea solution concentration, step S1, obtaining the basic parameters of the urea solution, includes:

[0015] The basic parameters of the urea solution are obtained through a data processing unit and a photoelectric processing unit. The photoelectric processing unit includes a light source, a prism, a charge-coupled device, a light source driving circuit, and a CCD driving circuit. Both the light source driving circuit and the CCD driving circuit are electrically connected to the data processing unit.

[0016] The acquisition of basic parameters of the urea solution through the data processing unit and the photoelectric processing unit includes:

[0017] The light source driving circuit is used to drive the light source to emit incident light signals;

[0018] The prism is used to direct the incident light signal onto the urea solution;

[0019] The charge-coupled device is used to receive the refracted light signal obtained by the refraction of the incident light signal in the urea solution, and to convert the refracted light signal into an electrical signal.

[0020] The CCD driving circuit is used to send the electrical signal to the data processing unit;

[0021] The data processing unit is used to determine the refractive index of the urea solution based on the electrical signal, and to determine the concentration of the urea solution based on the refractive index.

[0022] If the basic parameters include the urea solution temperature, step S1, obtaining the basic parameters of the urea solution, includes:

[0023] The basic parameters of the urea solution are obtained through a temperature acquisition unit;

[0024] If the basic parameters include the urea solution level, step S1, obtaining the basic parameters of the urea solution, includes:

[0025] The basic parameters of the urea solution are obtained through the liquid level acquisition unit.

[0026] The beneficial effects of adopting the above-mentioned further solutions are as follows: the photoelectric processing unit can use photoelectric instruments with high waterproof rating, good sealing performance, explosion-proof function, long service life, and convenient and quick maintenance to detect the concentration of urea solution, and can work normally in urea solution for a long time; the concentration of urea solution is detected by optical detection technology, which is accurate, stable, and has a fast response time; the basic parameters of urea solution are directly obtained through temperature acquisition unit and liquid level acquisition unit, which is fast, easy to operate, and facilitates subsequent improvement of the quality of emissions.

[0027] Furthermore, if the basic parameters include the urea solution temperature, the acquisition of the basic parameters of the urea solution through the temperature acquisition unit includes:

[0028] The temperature value of the urea solution is obtained through the temperature acquisition unit.

[0029] The temperature value is filtered to obtain the temperature of the urea solution.

[0030] If the basic parameters include the urea solution level, the acquisition of the basic parameters of the urea solution through the level acquisition unit includes:

[0031] The liquid level value of the urea solution is obtained through the liquid level acquisition unit;

[0032] The liquid level value is filtered to obtain the urea solution level.

[0033] The beneficial effect of adopting the above-mentioned further solution is that by filtering the acquired temperature and liquid level values, erroneous information caused by accidental interference can be effectively eliminated, thereby improving the detection accuracy.

[0034] Furthermore, the charge-coupled device includes multiple positions for mapping electrical signals, the electrical signals including sub-signals corresponding to each of the positions, and the data processing unit determines the refractive index of the urea solution based on the electrical signals, including:

[0035] Data filtering is performed on each of the sub-electrical signals to obtain multiple original feature values. For each original feature value, the original feature value represents the position of the corresponding sub-electrical signal mapped on the charge-coupled device.

[0036] Based on the multiple original feature values, the target feature value is determined using an extreme value algorithm;

[0037] Based on the target characteristic value, the refractive index of the urea solution is determined using the law of refraction and a temperature compensation algorithm.

[0038] The beneficial effect of adopting the above-mentioned further solution is that by filtering the acquired data, erroneous information caused by accidental interference can be effectively eliminated, thereby improving the detection accuracy.

[0039] Furthermore, determining the refractive index of the urea solution using the law of refraction and a temperature compensation algorithm includes:

[0040] Based on the target characteristic value, the original refractive index of the urea solution is determined using the law of refraction;

[0041] Based on the original refractive index, the refractive index of the urea solution is determined according to the first formula, which is:

[0042] Ref(T1) = Ref(T2) + (T2 - T1)k

[0043] Where T1 represents the current temperature of the urea solution; Ref(T1) represents the refractive index of the urea solution; T2 represents the reference temperature; Ref(T2) represents the original refractive index of the urea solution at the reference temperature; and k represents the temperature compensation coefficient.

[0044] The beneficial effects of adopting the above-mentioned further scheme are: the refractive index of urea solution of the same concentration will change with temperature. By compensating for the temperature of urea solution, the concentration of urea solution can be directly determined according to the table of refractive index and urea solution concentration at the reference temperature, and the environmental adaptability is strong.

[0045] Furthermore, if the basic parameters include urea solution concentration, the parameter thresholds include an upper concentration threshold and a lower concentration threshold; step S2, determining whether the urea solution is qualified based on the preset parameter thresholds and the basic parameters, includes:

[0046] If the concentration of the urea solution is not greater than a preset upper concentration threshold and not less than a preset lower concentration threshold, then the urea solution is determined to be qualified.

[0047] If the concentration of the urea solution is greater than the upper concentration threshold or less than the lower concentration threshold, then the urea solution is determined to be unqualified.

[0048] If the basic parameters include the urea solution temperature, and the parameter thresholds include an upper temperature threshold and a lower temperature threshold, step S2, determining whether the urea solution is qualified based on the preset parameter thresholds and the basic parameters, includes:

[0049] If the temperature of the urea solution is not greater than the preset upper temperature threshold and not less than the preset lower temperature threshold, then the urea solution is determined to be qualified.

[0050] If the temperature of the urea solution is greater than the upper temperature threshold or less than the lower temperature threshold, then the urea solution is determined to be unqualified.

[0051] If the basic parameters include the urea solution level, and the parameter thresholds include an upper level threshold and a lower level threshold, step S2, determining whether the urea solution is qualified based on the preset parameter thresholds and the basic parameters, includes:

[0052] If the urea solution level is not greater than the preset upper threshold and not less than the preset lower threshold, then the urea solution is determined to be qualified.

[0053] If the urea solution level is greater than the upper threshold or less than the lower threshold, the urea solution is determined to be unqualified.

[0054] The beneficial effect of adopting the above-mentioned further solution is that by detecting whether the various parameters of the urea solution are qualified, subsequent processing is facilitated.

[0055] Furthermore, if the basic parameters include the urea solution temperature, the method further includes:

[0056] Step S4: If the temperature of the urea solution is lower than the threshold temperature, the urea solution is heated.

[0057] The beneficial effects of adopting the above-mentioned further solutions are: if the temperature of the urea solution is too low, the solution will crystallize. Heating the solution will prevent crystallization and ensure that the urea solution can be used normally during vehicle use; controlling the temperature of the urea solution at the reference temperature will facilitate the calculation of the refractive index, thereby improving the detection accuracy of the urea solution concentration.

[0058] To address the technical problems existing in the prior art, the present invention also provides a device for detecting the basic parameters of urea solution, comprising:

[0059] The data acquisition module is used to acquire basic parameters of the urea solution, including at least one of the following: urea solution concentration, urea solution temperature, and urea solution level.

[0060] The parameter detection module is used to determine whether the urea solution is qualified based on the preset parameter threshold and the basic parameters.

[0061] Furthermore, the aforementioned device also includes:

[0062] An alarm module is used to issue an alarm when the urea solution is determined to be substandard: if the urea solution is substandard, an alarm message is generated based on the basic parameters, and the alarm message is displayed and / or played in audio form.

[0063] To address the technical problems existing in the prior art, the present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the method for detecting the basic parameters of urea solution as described above.

[0064] To address the technical problems existing in the prior art, the present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the method for detecting the basic parameters of urea solution as described above. Attached Figure Description

[0065] Figure 1 This is a schematic flowchart of the method for detecting the basic parameters of urea solution in this invention;

[0066] Figure 2 This is a schematic diagram of the structure of the device for detecting the basic parameters of urea solution in this invention;

[0067] Figure 3 This is a schematic diagram of the electronic device in this invention. Detailed Implementation

[0068] The principles and features of the present invention are described below. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0069] Example 1

[0070] To address the technical problems existing in the prior art, this embodiment provides a method for detecting the basic parameters of urea solution, such as... Figure 1 As shown, the method includes:

[0071] Step S1: Obtain the basic parameters of the urea solution, including at least one of the following: urea solution concentration, urea solution temperature, and urea solution level.

[0072] Step S2: Determine whether the urea solution is qualified based on the preset parameter threshold and the basic parameters.

[0073] There are two main types of methods commonly used for detecting the concentration of urea solution. One type uses chemical methods, such as combustion nitrogen determination, colorimetry, and titration. However, chemical methods cannot be used for online measurement in vehicles, and they require high-quality instruments, are cumbersome to operate, and have long detection times. The other type uses sensors, such as ultrasonic sensors. However, ultrasonic sensors have problems with large detection errors, low accuracy, and low stability.

[0074] In this embodiment, if the basic parameters include the urea solution concentration, step S1, obtaining the basic parameters of the urea solution, includes:

[0075] The basic parameters of the urea solution are obtained through a data processing unit and a photoelectric processing unit. The photoelectric processing unit includes a light source, a prism, a charge-coupled device (CCD), a light source driving circuit, and a CCD driving circuit. Both the light source driving circuit and the CCD driving circuit are electrically connected to the data processing unit.

[0076] The acquisition of basic parameters of the urea solution through the data processing unit and the photoelectric processing unit specifically includes:

[0077] The light source driving circuit is used to receive instructions sent by the data processing unit and drive the light source to emit incident light signals.

[0078] The prism is used to direct the incident light signal onto the urea solution;

[0079] The charge-coupled device is used to receive the refracted light signal obtained by the refraction of the incident light signal in the urea solution, and to convert the refracted light signal into an electrical signal.

[0080] The CCD driving circuit is used to send the electrical signal to the data processing unit;

[0081] The data processing unit is used to determine the refractive index of the urea solution based on the electrical signal, and to determine the concentration of the urea solution based on the refractive index.

[0082] It should be noted that urea solutions of different concentrations have different refractive indices, and for urea solutions of different concentrations, the electrical signal obtained by the charge-coupled device based on the refracted light signal is different.

[0083] The charge-coupled device includes multiple positions for mapping electrical signals, and the electrical signals include sub-signals corresponding to each of the positions. The data processing unit determines the refractive index of the urea solution based on the electrical signals, specifically including:

[0084] Each of the sub-electrical signals is subjected to data filtering to obtain multiple original feature values. For each original feature value, the original feature value represents the position of the corresponding sub-electrical signal mapped on the charge-coupled device. The methods for data filtering of the electrical signals include median filtering, mean filtering, and Gaussian filtering algorithms. By performing data filtering on the electrical signals, noise in the signals is removed, thereby improving the accuracy of subsequent calculation of the refractive index of the urea solution.

[0085] Based on multiple original feature values, a target feature value is determined using an extreme value algorithm; wherein, among the multiple original feature values, there is a mode, and determining the target feature value using the extreme value algorithm means determining the mode as the target feature value;

[0086] Based on the target characteristic value, the refractive index of the urea solution is determined using the law of refraction and a temperature compensation algorithm.

[0087] As the temperature of the urea solution changes, the relationship between the concentration and refractive index of the urea solution also changes. Therefore, when determining the refractive index of the urea solution, a temperature compensation algorithm is required to accurately determine the concentration of the urea solution.

[0088] Specifically, determining the refractive index of the urea solution using the law of refraction and a temperature compensation algorithm includes:

[0089] Based on the target characteristic value, the original refractive index of the urea solution is determined using the law of refraction;

[0090] Based on the original refractive index, the refractive index of the urea solution is determined according to the first formula, which is:

[0091] Ref(T1) = Ref(T2) + (T2 - T1)k

[0092] In the above formula, T1 represents the current temperature of the urea solution; Ref(T1) represents the refractive index of the urea solution; T2 represents the reference temperature; Ref(T2) represents the refractive index of the urea solution at the reference temperature, i.e., the original refractive index of the urea solution; k represents the temperature compensation coefficient; wherein, the temperature compensation coefficient can be set according to human experience, and the refractive index of the urea solution at the reference temperature can be obtained by looking up a table.

[0093] Specifically, determining the urea solution concentration based on the refractive index includes:

[0094] The concentration of the urea solution is determined by looking up a table based on the refractive index.

[0095] For example, the relationship between the concentration and refractive index of a certain urea solution at 20℃ is shown in Table 1.

[0096] Table 1 - Correspondence between the concentration and refractive index of a certain urea solution

[0097] concentration 31.7 31.8 32 32.1 32.3 32.4 Refractive index 1.381136 1.381309 1.381655 1.381828 1.382174 1.382347 concentration 32.5 32.6 32.8 32.9 33.1 33.4 Refractive index 1.38252 1.382693 1.383039 1.383212 1.383558 1.384077

[0098] Wherein, if the basic parameters include urea solution concentration, the parameter thresholds include an upper concentration threshold and a lower concentration threshold; step S2, determining whether the urea solution is qualified based on the preset parameter thresholds and the basic parameters, includes:

[0099] If the concentration of the urea solution is not greater than a preset upper concentration threshold and not less than a preset lower concentration threshold, then the urea solution is determined to be qualified.

[0100] If the concentration of the urea solution is greater than the upper concentration threshold or less than the lower concentration threshold, then the urea solution is determined to be unqualified.

[0101] Wherein, if the basic parameters include the urea solution temperature, step S1, obtaining the basic parameters of the urea solution, includes:

[0102] The basic parameters of the urea solution are obtained through a temperature acquisition unit.

[0103] Wherein, if the basic parameters include the urea solution temperature, and the parameter thresholds include an upper temperature threshold and a lower temperature threshold, step S2, determining whether the urea solution is qualified based on the preset parameter thresholds and the basic parameters, includes:

[0104] If the temperature of the urea solution is not greater than the preset upper temperature threshold and not less than the preset lower temperature threshold, then the urea solution is determined to be qualified.

[0105] If the temperature of the urea solution is greater than the upper temperature threshold or less than the lower temperature threshold, then the urea solution is determined to be unqualified.

[0106] Optionally, if the basic parameters include the urea solution temperature, the step of acquiring the basic parameters of the urea solution through the temperature acquisition unit includes:

[0107] The temperature value of the urea solution is obtained through the temperature acquisition unit.

[0108] The temperature value is filtered to obtain the temperature of the urea solution. In this embodiment, a mean filtering algorithm is used to filter the temperature value.

[0109] Wherein, if the basic parameters include the urea solution level, step S1, obtaining the basic parameters of the urea solution, includes:

[0110] The basic parameters of the urea solution are obtained through the liquid level acquisition unit.

[0111] Wherein, if the basic parameters include the urea solution temperature, and the parameter thresholds include an upper temperature threshold and a lower temperature threshold, step S2, determining whether the urea solution is qualified based on the preset parameter thresholds and the basic parameters, includes:

[0112] If the urea solution level is not greater than the preset upper threshold and not less than the preset lower threshold, then the urea solution is determined to be qualified.

[0113] If the urea solution level is greater than the upper threshold or less than the lower threshold, the urea solution is determined to be unqualified.

[0114] Optionally, if the basic parameters include the urea solution level, the step of acquiring the basic parameters of the urea solution through the level acquisition unit includes:

[0115] The liquid level value of the urea solution is obtained through the liquid level acquisition unit;

[0116] The liquid level value is filtered to obtain the urea solution level. In this embodiment, a mean filtering algorithm is used to filter the liquid level value.

[0117] Optionally, the above methods also include:

[0118] Step S3: If the urea solution is substandard, an alarm message is generated based on the basic parameters, and the alarm message is displayed and / or played in audio format.

[0119] Wherein, if the basic parameters include urea solution concentration, step S3 specifically includes:

[0120] If the concentration of the urea solution is greater than the upper threshold, an alarm message is generated based on the concentration of the urea solution, and the alarm message is displayed and / or played in audio form.

[0121] If the concentration of the urea solution is less than the lower concentration threshold, an alarm message is generated based on the concentration of the urea solution, and the alarm message is displayed and / or played in audio form.

[0122] If the basic parameters include urea solution concentration, when the urea solution is determined to be unqualified, it indicates that the quality of the urea solution is substandard, and the generated alarm information includes information that the urea solution needs to be replaced.

[0123] Wherein, if the basic parameters include the urea solution temperature, step S3 specifically includes:

[0124] If the temperature of the urea solution is greater than the upper temperature threshold, an alarm message is generated based on the temperature of the urea solution, and the alarm message is displayed and / or played in audio form.

[0125] If the temperature of the urea solution is lower than the threshold temperature, an alarm message is generated based on the temperature of the urea solution, and the alarm message is displayed and / or played in audio form.

[0126] If the basic parameters include the urea solution temperature, when the urea solution is determined to be unqualified, the generated alarm information includes information that the urea solution temperature has not reached the required level.

[0127] Wherein, if the basic parameters include the urea solution level, step S3 specifically includes:

[0128] If the urea solution level is greater than the upper threshold, an alarm message is generated based on the urea solution level, and the alarm message is displayed and / or played in audio form.

[0129] If the urea solution level is lower than the lower threshold, an alarm message is generated based on the urea solution level, and the alarm message is displayed and / or played in audio format.

[0130] If the basic parameters include the urea solution level, when the urea solution is determined to be unqualified, the generated alarm information includes information that the urea solution level has not reached the required level.

[0131] Optionally, if the basic parameters include the urea solution temperature, the above method further includes:

[0132] If the temperature of the urea solution is lower than the threshold temperature, the urea solution is heated to prevent it from freezing.

[0133] Example 2

[0134] Based on the same principle as the detection method for basic parameters of urea solution disclosed in the above embodiments, this embodiment provides a device for detecting basic parameters of urea solution, such as... Figure 2 As shown, the device includes:

[0135] The data acquisition module is used to acquire basic parameters of the urea solution, including at least one of the following: urea solution concentration, urea solution temperature, and urea solution level.

[0136] The parameter detection module is used to determine whether the urea solution is qualified based on the preset parameter threshold and the basic parameters.

[0137] Wherein, if the basic parameters include urea solution concentration, the data acquisition module includes:

[0138] The photoelectric processing unit is used to receive instructions sent by the data processing unit, acquire an electrical signal for the urea solution concentration, and send the electrical signal to the data processing unit.

[0139] The data processing unit is used to send instructions to the photoelectric processing unit, receive the electrical signal acquired by the photoelectric processing unit, determine the refractive index and concentration of the urea solution based on the electrical signal, and send the acquired urea solution concentration to the parameter detection module.

[0140] The photoelectric processing unit includes a light source, a prism, a charge-coupled device (CCD), a light source driving circuit, and a CCD driving circuit. Both the light source driving circuit and the CCD driving circuit are electrically connected to the data processing unit.

[0141] The light source driving circuit is used to receive instructions sent by the data processing unit and drive the light source to emit incident light signals.

[0142] The prism is used to direct the incident light signal onto the urea solution;

[0143] The charge-coupled device is used to receive the refracted light signal obtained by the refraction of the incident light signal in the urea solution, and to convert the refracted light signal into an electrical signal.

[0144] The CCD driving circuit is used to send the electrical signal to the data processing unit;

[0145] The data processing unit is used to determine the refractive index of the urea solution based on the electrical signal, and to determine the concentration of the urea solution based on the refractive index.

[0146] The charge-coupled device includes multiple positions for mapping electrical signals, the electrical signals including sub-signals corresponding to each of the positions, and the data processing unit includes:

[0147] The first data processing subunit is used to perform data filtering processing on each of the sub-electrical signals to obtain multiple original feature values. For each original feature value, the original feature value represents the position of the corresponding sub-electrical signal mapped on the charge-coupled device.

[0148] The second data processing subunit is used to determine the target feature value based on the multiple original feature values ​​using an extreme value algorithm;

[0149] The third data processing subunit is used to determine the refractive index of the urea solution based on the target feature value using the law of refraction and a temperature compensation algorithm.

[0150] The fourth data processing subunit is used to determine the concentration of the urea solution by looking up a table based on the refractive index.

[0151] Wherein, if the basic parameters include urea solution concentration, and the parameter thresholds include an upper concentration threshold and a lower concentration threshold, the parameter detection module determines whether the urea solution is qualified based on the preset parameter thresholds and the basic parameters, specifically as follows:

[0152] If the concentration of the urea solution is not greater than a preset upper concentration threshold and not less than a preset lower concentration threshold, then the urea solution is determined to be qualified.

[0153] If the concentration of the urea solution is greater than the upper concentration threshold or less than the lower concentration threshold, then the urea solution is determined to be unqualified.

[0154] Wherein, if the basic parameters include the urea solution temperature, the data acquisition module includes:

[0155] A temperature acquisition unit is used to obtain the temperature of the urea solution.

[0156] Wherein, if the basic parameters include the urea solution temperature, and the parameter thresholds include an upper temperature threshold and a lower temperature threshold, the parameter detection module determines whether the urea solution is qualified based on the preset parameter thresholds and the basic parameters, specifically as follows:

[0157] If the temperature of the urea solution is not greater than the preset upper temperature threshold and not less than the preset lower temperature threshold, then the urea solution is determined to be qualified.

[0158] If the temperature of the urea solution is greater than the upper temperature threshold or less than the lower temperature threshold, then the urea solution is determined to be unqualified.

[0159] Wherein, if the basic parameters include the urea solution level, the data acquisition module includes:

[0160] A liquid level acquisition unit is used to acquire the liquid level of the urea solution.

[0161] Wherein, if the basic parameters include the urea solution level, and the parameter thresholds include an upper level threshold and a lower level threshold, the parameter detection module determines whether the urea solution is qualified based on the preset parameter thresholds and the basic parameters, specifically as follows:

[0162] If the urea solution level is not greater than the preset upper threshold and not less than the preset lower threshold, then the urea solution is determined to be qualified.

[0163] If the urea solution level is greater than the upper threshold or less than the lower threshold, the urea solution is determined to be unqualified.

[0164] Optionally, the above-mentioned device further includes:

[0165] An alarm module is used to issue an alarm when the urea solution is determined to be substandard: if the urea solution is substandard, an alarm message is generated based on the basic parameters, and the alarm message is displayed and / or played in audio form.

[0166] Optionally, if the basic parameters include the urea solution temperature, the above device further includes:

[0167] A heating module is used to heat the urea solution when the temperature of the urea solution is lower than the temperature threshold; the heating module is connected to the parameter detection module.

[0168] Optionally, the above-mentioned device further includes:

[0169] A data storage module is used to store the basic parameters of the acquired urea solution, and the data storage module is connected to the parameter detection module.

[0170] Optionally, the above-mentioned device further includes:

[0171] The communication module is used to establish a connection between the parameter detection module and the host computer, and to send the basic parameters of the urea solution to the host computer.

[0172] The host computer can display the basic parameters of the urea solution and adjust the parameter thresholds, the temperature compensation coefficient, the algorithm used for data filtering, and the frequency of data acquisition by the data acquisition module to meet the needs of different working conditions. The parameter thresholds include the upper concentration threshold and the lower concentration threshold.

[0173] In this invention, the hardware of the device for detecting the basic parameters of the urea solution is designed for explosion protection in accordance with the recommended national standard GB / T3836-2021 "Explosive Atmospheres", with an explosion protection mark of Ex ib 1 Mb. The use of the device for detecting the basic parameters of the urea solution refers to the "General Technical Requirements for Electrical and Electronic Products for Communication, Detection, and Control in Coal Mines" (MT209-90). Specifically, the operating conditions of the device for detecting the basic parameters of the urea solution should meet the following requirements:

[0174] Altitude not exceeding 2000m (80kPa~106kPa);

[0175] Ambient temperature: 0℃~+85℃;

[0176] The relative humidity of the surrounding air should not exceed 95% (25℃);

[0177] There is an environment with methane and coal dust explosions, but no significant vibrations or impacts, and no corrosive gases that could damage insulation.

[0178] In this invention, the device for detecting the basic parameters of the urea solution is powered by an intrinsically safe power supply. The intrinsically safe parameters are: intrinsically safe maximum output voltage Uo: 12.5V, intrinsically safe maximum output current Io: 1.3A, intrinsically safe output external allowable distributed inductance Lo: 0.2mH, and intrinsically safe output external allowable distributed capacitance Co: 25uF.

[0179] In this invention, the data processing unit and the parameter detection module can be integrated into one unit. The data processing unit adopts an automotive-grade main control chip, and the rated operating voltage of the data processing unit is 12VDC and the operating current is ≤1A.

[0180] Example 3

[0181] To address the technical problems existing in the prior art, this embodiment provides an electronic device, such as... Figure 3 As shown, it includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements a method for detecting basic parameters of urea solution as described in Embodiment 1.

[0182] Example 4

[0183] To address the technical problems existing in the prior art, this embodiment provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the method for detecting the basic parameters of urea solution as described in Embodiment 1.

[0184] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for detecting the essential parameters of a urea solution, characterized in that, The method comprises the following steps: S1, acquiring basic parameters of the urea solution, the basic parameters comprising at least one of urea solution concentration, urea solution temperature and urea solution liquid level; If the basic parameters comprise urea solution concentration, the step S1 of acquiring the basic parameters of the urea solution comprises: acquiring the basic parameters of the urea solution by a data processing unit and an optoelectronic processing unit, the optoelectronic processing unit comprising a light source, a prism, a charge-coupled device, a light source driving circuit and a CCD driving circuit, the light source driving circuit and the CCD driving circuit being electrically connected with the data processing unit; The step of acquiring the basic parameters of the urea solution by the data processing unit and the optoelectronic processing unit comprises: the light source driving circuit is used for driving the light source to emit an incident light signal; the prism is used for irradiating the incident light signal into the urea solution; the charge-coupled device is used for receiving a refracted light signal based on the incident light signal refracted in the urea solution and converting the refracted light signal into an electric signal; the CCD driving circuit is used for sending the electric signal to the data processing unit; and the data processing unit is used for determining the refractive index of the urea solution according to the electric signal and determining the urea solution concentration according to the refractive index; The charge-coupled device comprises a plurality of positions for mapping electric signals, the electric signals comprising a plurality of sub-electric signals corresponding to the positions, and the data processing unit determines the refractive index of the urea solution according to the electric signals, which comprises: performing data filtering processing on each of the sub-electric signals to obtain a plurality of original characteristic values, each of the original characteristic values representing a position of the corresponding sub-electric signal on the charge-coupled device; determining a target characteristic value by an extremum algorithm according to the plurality of original characteristic values; determining an original refractive index of the urea solution by the refraction law according to the target characteristic value; and determining the refractive index of the urea solution according to a first formula according to the original refractive index, the first formula being: Ref(T1) = Ref(T2) + (T2-T1)k wherein T1 represents the current temperature of the urea solution, Ref(T1) represents the refractive index of the urea solution, T2 represents a reference temperature, Ref(T2) represents the original refractive index of the urea solution at the reference temperature, and k represents a temperature compensation coefficient; S2, determining whether the urea solution is qualified according to a preset parameter threshold and the basic parameters.

2. The method of claim 1, wherein, The method further comprises the following steps: S3, if the urea solution is unqualified, generating alarm information according to the basic parameters, and displaying and / or playing the alarm information in the form of audio.

3. The method of claim 1, wherein, If the basic parameters comprise urea solution temperature, the step S1 of acquiring the basic parameters of the urea solution comprises: acquiring the basic parameters of the urea solution by a temperature acquisition unit; If the basic parameters comprise urea solution liquid level, the step S1 of acquiring the basic parameters of the urea solution comprises: acquiring the basic parameters of the urea solution by a liquid level acquisition unit.

4. The method of claim 1, wherein, If the basic parameter comprises the urea solution concentration, the parameter threshold value comprises an upper concentration threshold value and a lower concentration threshold value; the step S2 of determining whether the urea solution is qualified according to the preset parameter threshold value and the basic parameter comprises: If the urea solution concentration is not greater than the preset upper concentration threshold value and not less than the preset lower concentration threshold value, it is determined that the urea solution is qualified; If the urea solution concentration is greater than the upper concentration threshold value or less than the lower concentration threshold value, it is determined that the urea solution is unqualified; If the basic parameter comprises the urea solution temperature, the parameter threshold value comprises an upper temperature threshold value and a lower temperature threshold value, and the step S2 of determining whether the urea solution is qualified according to the preset parameter threshold value and the basic parameter comprises: If the urea solution temperature is not greater than the preset upper temperature threshold value and not less than the preset lower temperature threshold value, it is determined that the urea solution is qualified; If the urea solution temperature is greater than the upper temperature threshold value or less than the lower temperature threshold value, it is determined that the urea solution is unqualified; If the basic parameter comprises the urea solution liquid level, the parameter threshold value comprises an upper liquid level threshold value and a lower liquid level threshold value, and the step S2 of determining whether the urea solution is qualified according to the preset parameter threshold value and the basic parameter comprises: If the urea solution liquid level is not greater than the preset upper liquid level threshold value and not less than the preset lower liquid level threshold value, it is determined that the urea solution is qualified; If the urea solution liquid level is greater than the upper liquid level threshold value or less than the lower liquid level threshold value, it is determined that the urea solution is unqualified.

5. The method of claim 1, wherein, If the basic parameter comprises the urea solution temperature, the method further comprises: Step S4, if the urea solution temperature is less than the lower temperature threshold value, heating the urea solution.

6. A device for detecting the essential parameters of a urea solution, characterized in that, Comprise: The data acquisition module is used for acquiring the basic parameter of the urea solution, and the basic parameter comprises at least one of the urea solution concentration, the urea solution temperature and the urea solution liquid level; If the basic parameter comprises the urea solution concentration, the data acquisition module is specifically used for acquiring the basic parameter of the urea solution through a data processing unit and an optoelectronic processing unit, the optoelectronic processing unit comprises a light source, a prism, a charge coupled device, a light source driving circuit and a CCD driving circuit, and the light source driving circuit and the CCD driving circuit are electrically connected with the data processing unit; The data acquisition module is specifically used for: the light source driving circuit is used for driving the light source to emit an incident light signal; the prism is used for irradiating the incident light signal into the urea solution; the charge coupled device is used for receiving a refracted light signal obtained based on the refraction of the incident light signal in the urea solution and converting the refracted light signal into an electric signal; the CCD driving circuit is used for sending the electric signal to the data processing unit; and the data processing unit is used for determining the refractive index of the urea solution according to the electric signal and determining the urea solution concentration according to the refractive index. The charge coupled device comprises a plurality of positions for mapping electrical signals, the electrical signals comprising a sub-electrical signal corresponding to each of the positions, and the data acquisition module is specifically configured to: perform data filtering processing on each of the sub-electrical signals to obtain a plurality of original characteristic values, each of the original characteristic values representing a position on the charge coupled device corresponding to a sub-electrical signal; determine a target characteristic value by an extremum algorithm according to the plurality of original characteristic values; determine an original refractive index of the urea solution by the refraction law according to the target characteristic value; and determine the refractive index of the urea solution according to the original refractive index and according to a first formula, the first formula being: Ref(T1)=Ref(T2)+(T2-T1)k wherein T1 represents a current temperature of the urea solution; Ref(T1) represents the refractive index of the urea solution; T2 represents a reference temperature; Ref(T2) represents an original refractive index of the urea solution at the reference temperature; and k represents a temperature compensation coefficient; The parameter detection module is configured to determine whether the urea solution is qualified according to a preset parameter threshold and the basic parameter.

7. An electronic device, comprising: The computer readable storage medium stores a computer program, and the computer program is executed by the processor to implement the method for detecting the basic parameter of the urea solution according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, and the computer program is executed by the processor to implement the method for detecting the basic parameter of the urea solution according to any one of claims 1 to 5.

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