Sensor-based device for detecting furfural in insulating oil

Abstract

The utility model discloses a sensor-based device for detecting furfural in insulating oil, which comprises a furfural sensor, a data processing module and a communication interface, the data processing module is simultaneously in communication connection with the furfural sensor and the communication interface, and a detection signal of the furfural sensor is transmitted to the data processing module for data processing. The processed detection signal is transmitted to external equipment through the communication interface; the furfural sensor comprises a reaction tank and a color sensor located at the top end of the reaction tank, an acidic sodium thiocyanate solution is contained in the reaction tank, and a detection signal corresponds to a detection value of the color sensor. According to the furfural detection device, the furfural concentration is determined by utilizing the reaction tank and the color sensor, the detection device is low in cost, furfural content detection and detection signal processing and transmission can be accurately realized, the application range of the furfural detection device is widened, and the detection cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of furfural detection, in particular to a sensor-based furfural detection device in insulating oil. Background Art

[0002] The furfural content in transformer oil is an important indicator for evaluating the operating status of the transformer and preventing transformer failures. Currently, the detection of furfural usually relies on complex laboratory analysis methods, which are time-consuming and require professional personnel to operate.

[0003] At present, the methods for detecting furfural include high performance liquid chromatography, gas chromatography, colorimetry and infrared spectroscopy. Among them, high performance liquid chromatography requires a large amount of reagents, equipment and time, which is relatively costly. Gas chromatography has the advantages of fast detection speed, high accuracy and good separation, but the cost of instruments and equipment for this method is relatively high. The colorimetric method can measure the content of furfural using only some simple reagents, but this method has certain errors and low measurement accuracy. It is only suitable for estimating the approximate content of furfural in the sample. The instruments and equipment used in infrared spectroscopy also face the defect of high cost.

[0004] Therefore, it is of great significance to develop a rapid, field-available and accurate furfural detection device Utility Model Content

[0005] The utility model aims to solve at least one of the problems in the related art to a certain extent. To this end, the purpose of the utility model is to provide a sensor-based furfural detection device in insulating oil, which uses a reaction cell and a color sensor to determine the furfural concentration. The detection device has low cost and can accurately detect the furfural content, as well as the processing and transmission of the detection signal, thereby increasing the application range of the furfural detection device and reducing the detection cost.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a sensor-based furfural detection device in insulating oil, comprising a furfural sensor, a data processing module and a communication interface, wherein the data processing module is communicatively connected with the furfural sensor and the communication interface at the same time, the detection signal of the furfural sensor is transmitted to the data processing module for data processing, and the processed detection signal is transmitted to an external device via the communication interface;

[0007] The furfural sensor comprises a reaction tank and a color sensor located at the top of the reaction tank. The reaction tank contains an acidic sodium thiocyanate solution. The detection signal corresponds to the detection value of the color sensor.

[0008] Furthermore, the furfural sensor also includes a signal amplification unit, and the detection signal is transmitted to the data processing module through the signal amplification unit.

[0009] Furthermore, a shading plate is provided on the outer peripheral side of the reaction pool.

[0010] Furthermore, the data processing module includes an analog-to-digital converter, a data processing unit and a storage unit. The detection signal is converted into a digital signal by the analog-to-digital converter, and the data processing unit processes the digital signal and stores it in the storage unit.

[0011] Furthermore, the data processing unit includes a comparator and a filter, wherein an input end of the filter is connected to the analog-to-digital converter, an output end of the filter is connected to one input end of the comparator, and another input end of the comparator is connected to a standard signal.

[0012] Furthermore, the communication interface includes a wireless communication module and / or a wired communication module, and the digital signal in the storage unit is wirelessly transmitted with the external device through the wireless communication module, and the digital signal in the storage unit is wiredly transmitted with the external device through the wired communication module.

[0013] Furthermore, it also includes a display and control system, which is communicatively connected to the data processing module, and the display and control system includes a display screen and an operation interface.

[0014] Furthermore, it also includes a power module, which is simultaneously connected to the furfural sensor, the data processing module and the communication interface.

[0015] Furthermore, the power module includes a battery and a charging interface, the battery is connected to the furfural sensor, the data processing module and the communication interface at the same time, and the charging interface is connected to an external power source and the battery.

[0016] Furthermore, it also includes a protective shell, which is wrapped around the outside of the furfural detection device.

[0017] The above technical solution provided by the embodiment of the present application has the following advantages over the prior art: the present application provides a sensor-based furfural detection device in insulating oil, including a furfural sensor, a data processing module and a communication interface, the data processing module is simultaneously connected to the furfural sensor and the communication interface, the detection signal of the furfural sensor is transmitted to the data processing module for data processing, and the processed detection signal is transmitted to the external device via the communication interface; wherein the furfural sensor includes a reaction pool and a color sensor located at the top of the reaction pool, the reaction pool is filled with an acidic sodium thiocyanate solution, and the detection signal corresponds to the detection value of the color sensor. When the insulating oil in the transformer is placed in the reaction pool, the furfural in the paper insulation oil reacts with sodium thiocyanate in an acidic environment to form a red complex, and since sodium thiocyanate is originally a coloring liquid, as the amount of furfural reaction increases, the red complex will increase, and the color sensor can detect the color change in the reaction pool to obtain a detection signal; the detection signal in the reaction pool can also be processed by the data processing module, and then transmitted to the external device through the communication interface, and then the detection result is transmitted and recorded. The present application has a simple structure and utilizes a furfural sensor and a color sensor to detect the furfural content, thereby reducing the cost of the detection equipment, increasing the application scope of the detection device, and ensuring the accuracy of the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 This is a structural framework diagram of the furfural detection device of this application. DETAILED DESCRIPTION

[0021] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "rear", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the mechanism or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0022] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0023] In the following description, specific details such as specific system structures and technologies are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, mechanisms, circuits, and methods are omitted to avoid unnecessary details that hinder the description of the present invention.

[0024] Example 1

[0025] See also Figure 1The present application provides a sensor-based furfural detection device in insulating oil, comprising a furfural sensor, a data processing module and a communication interface, wherein the data processing module is communicatively connected to the furfural sensor and the communication interface at the same time, the detection signal of the furfural sensor is transmitted to the data processing module for data processing, and the processed detection signal is transmitted to an external device via the communication interface; wherein the furfural sensor comprises a reaction tank and a color sensor located at the top of the reaction tank, the reaction tank is filled with an acidic sodium thiocyanate solution, and the detection signal corresponds to the detection value of the color sensor.

[0026] When the insulating oil in the transformer is placed in the reaction tank, the furfural in the paper insulating oil reacts with sodium thiocyanate in an acidic environment to form a red complex. Since sodium thiocyanate is originally a coloring liquid, as the amount of furfural reaction increases, the red complex will increase. The color sensor can detect the color change in the reaction tank and obtain a detection signal. The detection signal in the reaction tank can also be processed by the data processing module and then transmitted to the external device through the communication interface, and then the detection results are transmitted and recorded.

[0027] The present application has a simple structure and utilizes a furfural sensor and a color sensor to detect the furfural content, thereby reducing the cost of the detection equipment, increasing the application scope of the detection device, and ensuring the accuracy of the detection results.

[0028] Example 1

[0029] See also Figure 1 The present application provides a sensor-based furfural detection device in insulating oil, comprising a furfural sensor, a data processing module and a communication interface, wherein the data processing module is communicatively connected to the furfural sensor and the communication interface at the same time, the detection signal of the furfural sensor is transmitted to the data processing module for data processing, and the processed detection signal is transmitted to an external device via the communication interface; wherein the furfural sensor comprises a reaction tank and a color sensor located at the top of the reaction tank, the reaction tank is filled with an acidic sodium thiocyanate solution, and the detection signal corresponds to the detection value of the color sensor.

[0030] Furthermore, the furfural sensor in the present application specifically includes a furfural detection unit and a signal amplification unit, wherein the furfural detection unit includes a reaction tank and a color sensor located at the top of the reaction tank, the reaction tank is filled with an acidic sodium thiocyanate solution, the detection signal corresponds to the detection value of the color sensor, and the detection signal is amplified by the signal amplification unit and then transmitted to the data processing module.

[0031] The insulating paper in the transformer is immersed in insulating oil. During the aging process, its components (such as cellulose and hemicellulose) degrade and eventually produce furfural and other low molecular weight organic matter. In this process, oxygen (O2) and electrons (e - ) participates in the reaction, generating furfural and hydroxide ions (OH - ), the reaction process is shown in the following formula:

[0032] 2CH2O+O2+2e - →Furaldehyde+2OH -

[0033] Furfural generated during the aging process of the insulating paper dissolves in the insulating oil. By detecting the furfural content in the insulating oil, the aging degree of the insulating paper can be evaluated. The sample to be tested in this application can be the insulating oil taken out of the transformer.

[0034] After the insulating oil is placed in the reaction tank, it reacts with sodium thiocyanate under acidic conditions to form a red complex. The reaction equation is:

[0035] C4H3OCHO+2NaSCN+2H + →C4H3OCHNASSCN+H2O

[0036] The color sensor can detect the color change in the reaction pool, and then obtain the difference before and after the color change, which is the detection signal. If the color sensor detects a large color change before and after the reaction, the detection signal is strong, indicating that the furfural content in the insulating oil is high and the corresponding insulating paper is aged. If the color sensor detects a small color change before and after the reaction, the detection signal is weak, indicating that the furfural content in the insulating oil is low and the corresponding insulating paper is aged less.

[0037] In the present application, a shading plate is provided on the outer peripheral side of the reaction pool, and the shading plate is used to shield the external light source or the light hardness to ensure the accuracy of the color sensor detection. The color sensor can be, for example, a TCS230 model color sensor.

[0038] In the present application, the signal amplification unit may be a voltage signal amplifier. The detection value of the color sensor is converted into a voltage signal and output to the signal amplification unit. The detection signal is amplified by the voltage amplifier to facilitate signal reading and processing.

[0039] The data processing module described in the present application includes an analog-to-digital converter, a data processing unit and a storage unit. The detection signal is converted into a digital signal by the analog-to-digital converter, and the data processing unit processes the digital signal and stores it in the storage unit.

[0040] The analog-to-digital converter may be any electronic component in the prior art that converts an analog signal into a digital signal. The data processing unit may specifically be at least one of the following:

[0041] The data processing unit includes a comparator, and the two input ends of the comparator are respectively connected to the detection signal and the standard signal, wherein the standard signal refers to the potential difference corresponding to the standard sample of known furfural concentration generated by the electrochemical reaction. Before using the furfural sensor for detection, the furfural sensor needs to be calibrated to ensure the accuracy and reliability of the measurement results. At this time, the original detection signal output by the furfural sensor can be compared with the standard signal to determine the relationship between the output of the furfural sensor and the actual furfural content. Among them, the comparator can be used for the calibration of the furfural sensor, and can also provide a benchmark for the detection signal during the furfural detection process, thereby quickly determining the generated furfural concentration.

[0042] The data processing unit includes a filter, the input end of the filter is connected to an analog-to-digital converter. The furfural sensor may be affected by noise or other external factors during the detection process. Therefore, the data output by the furfural sensor needs to be filtered to remove unnecessary fluctuations and interference and improve the stability and accuracy of the data.

[0043] The data processing unit includes a calculator, and the specific calculator can calculate the average value, standard deviation, and trend analysis of the detection signal, etc. The calculator here is an existing electronic component that can perform the above calculation operations.

[0044] The data processing unit can also include a comparator and a filter at the same time, wherein the input end of the filter is connected to the analog-to-digital converter, the output end of the filter is connected to one of the input ends of the comparator, and the other input end of the comparator is connected to a standard signal. That is, the filtering function and the calibration function are combined together. By calculating the average value, standard deviation, trend analysis, etc., more detailed and comprehensive information can be obtained. These analysis results can be used to determine the changing trend of the furfural content in the transformer oil and evaluate the operating status of the transformer.

[0045] The data processing unit in the present application may include a filter, a comparator and a calculator at the same time, or may include only one or two of them. The data processed by the data processing unit is stored in the storage unit, and can also communicate and transmit with an external device through a communication interface. The storage unit can be a storage element such as a hard disk.

[0046] The communication interface in the present application includes a wireless communication module and / or a wired communication module, and the digital signal in the storage unit is wirelessly transmitted with the external device through the wireless communication module, and the digital signal in the storage unit is wiredly transmitted with the external device through the wired communication module. Both the wireless communication module and the wired communication module are communication elements in the prior art.

[0047] The present application also includes a display and control system, which is in communication with the data processing module, and includes a display screen and an operation interface. The detection signal processed by the data processing module can be displayed on the display screen, and the operation interface is provided with a switch for controlling the start and stop of the furfural detection unit, and a key for controlling and adjusting the data processing module.

[0048] The present application also includes a power module, which is connected to the furfural sensor, the data processing module and the communication interface at the same time. The power module includes a battery and a charging interface, and the battery is connected to the furfural sensor, the data processing module and the communication interface at the same time. The charging interface is connected to an external power source and a battery for charging the battery. The battery is used to power the furfural sensor, the data processing module, the display and control system and the communication interface to ensure their normal operation.

[0049] In the present application, the data processing module, display and control system, power module, communication interface and furfural sensor can be integrated inside a frame, and the outer side of the frame is wrapped with a protective shell, which has a waterproof, dustproof and impact-resistant design to ensure that the device can work stably in various environments.

[0050] The furfural detection unit in the furfural detection device of the present application is easy to use and simple to operate, does not require complicated sample pre-treatment steps, and has a fast response, can quickly detect the furfural content in insulating oil and insulating paper, has high accuracy and stability, can reliably detect furfural in paper insulating oil, and can also communicate data with external devices, can realize real-time monitoring and remote control, and in addition to furfural content detection, can also perform oil quality analysis, which provides convenience and accuracy for transformer maintenance and fault diagnosis.

[0051] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should belong to the scope covered by the claims of the utility model.

Claims

1. A sensor-based device for detecting furfural in insulating oil, characterized in that: It includes a furfural sensor, a data processing module and a communication interface, wherein the data processing module is communicatively connected with the furfural sensor and the communication interface at the same time, a detection signal of the furfural sensor is transmitted to the data processing module for data processing, and the processed detection signal is transmitted to an external device via the communication interface; The furfural sensor comprises a reaction tank and a color sensor located at the top of the reaction tank. The reaction tank contains an acidic sodium thiocyanate solution. The detection signal corresponds to the detection value of the color sensor.

2. A sensor-based device for detecting furfural in insulating oil according to claim 1, characterized in that: The furfural sensor also includes a signal amplification unit, and the detection signal is transmitted to the data processing module through the signal amplification unit.

3. A sensor-based device for detecting furfural in insulating oil according to claim 1, characterized in that: A shading plate is arranged on the outer peripheral side of the reaction pool.

4. A sensor-based device for detecting furfural in insulating oil according to claim 1, characterized in that: The data processing module includes an analog-to-digital converter, a data processing unit and a storage unit. The detection signal is converted into a digital signal by the analog-to-digital converter, and the data processing unit processes the digital signal and stores it in the storage unit.

5. A sensor-based device for detecting furfural in insulating oil according to claim 4, characterized in that: The data processing unit comprises a comparator and a filter, wherein an input end of the filter is connected to the analog-digital converter, an output end of the filter is connected to one input end of the comparator, and another input end of the comparator is connected to a standard signal.

6. A sensor-based device for detecting furfural in insulating oil according to claim 4, characterized in that: The communication interface includes a wireless communication module and / or a wired communication module. The digital signal in the storage unit is wirelessly transmitted with the external device through the wireless communication module, and the digital signal in the storage unit is wiredly transmitted with the external device through the wired communication module.

7. A sensor-based device for detecting furfural in insulating oil according to claim 1, characterized in that: It also includes a display and control system, which is communicatively connected with the data processing module, and includes a display screen and an operation interface.

8. The sensor-based furfural detection device in insulating oil according to claim 1, characterized in that: It also includes a power supply module, which is connected to the furfural sensor, the data processing module and the communication interface at the same time.

9. A sensor-based device for detecting furfural in insulating oil according to claim 8, characterized in that: The power module comprises a battery and a charging interface, the battery is connected to the furfural sensor, the data processing module and the communication interface at the same time, and the charging interface is connected to an external power source and the battery.

10. The sensor-based furfural detection device in insulating oil according to claim 1, characterized in that: It also includes a protective shell, which is wrapped around the outside of the furfural detection device.

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