Low-power self-checking single-hydrogen sensor apparatus and monitoring method

Abstract

A low-power self-checking single-hydrogen sensor apparatus and a monitoring method. The low-power self-checking single-hydrogen sensor apparatus comprises: a housing (1), a detection connection portion (101) being provided on the housing (1), and an end portion of the detection connection portion (101) being provided with an interface (102) that is connected to a transformer; a first monitoring assembly (2), provided inside the detection connection portion (101), the first monitoring assembly (2) comprising a base body (201), a detection sensing layer (202), and a substrate (203) having an electrode, the substrate (203) for mounting the detection sensing layer (202) being provided on the base body (201), the detection sensing layer (202) being connected to the electrode on the substrate (203), and the base body (201) being provided inside the detection connection portion (101) and being connected to the detection connection portion (101); a benchmark reference module (3), provided inside the detection connection portion (101) and comprising a cavity (301), the inside of the cavity (301) being filled with insulating oil, and a second monitoring assembly (2) being provided in the cavity (301); a control module (4); a wireless transmission module (5); and a power supply (6). Self-calibrating, high-precision, and low-power hydrogen content monitoring is achieved by means of providing the benchmark reference module (3) inside a hydrogen sensor.

Description

A low-power self-calibration single hydrogen sensor device and monitoring method Technology Leader

[0001] The present invention relates to the field of sensor technology, and in particular to a low-power self-calibration single hydrogen sensor device and a monitoring method. Background Art

[0002] Due to the particularity of the structure of oil-filled bushings and current transformers, there are currently almost no effective detection and monitoring methods for oil-filled bushings and current transformers.

[0003] When discharge or thermal failure occurs within oil-filled bushings and current transformers, the oil and paper decompose to produce characteristic gases, with hydrogen comprising a significant proportion. When the gas exceeds the solubility of the oil, it accumulates in the bushing head oil conservator and the current transformer bellows, increasing the internal pressure. By monitoring the oil and gas pressure and hydrogen content within the oil-filled bushings and current transformers in real time, an alarm signal is issued when the pressure and hydrogen content exceed certain limits. Effective measures can be taken promptly to eliminate defects before they occur, effectively preventing accidents and significantly improving the operational reliability of power grid equipment.

[0004] Existing hydrogen sensors adjust the operating temperature of a palladium thin-film sensor chip by adding a semiconductor cooling and heating element beneath the silicon substrate. To achieve temperature control of the semiconductor cooling and heating element, a temperature measuring resistor and a temperature control system are usually required on the chip, making the chip design quite complicated. Furthermore, due to differences in ambient temperature, the measurement results will be affected by the ambient temperature, resulting in measurement offsets and inaccurate measurements.

[0005] Therefore, there is an urgent need for a low-power self-calibrating single hydrogen sensor device to solve the above-mentioned problem of inaccurate measurement. Technical Solutions

[0006] In order to address the above-mentioned deficiencies in the prior art, the present invention provides a low-power self-calibrating single hydrogen sensor device and a monitoring method.

[0007] The technical solution proposed by the present invention is:

[0008] A low-power self-checking single hydrogen sensor device; comprising:

[0009] A housing, wherein a detection connection portion is provided on the housing, and an end portion of the detection connection portion is provided with an interface for connection to a transformer;

[0010] a first monitoring assembly disposed within the detection connection portion, the first monitoring assembly comprising a base, a detection sensing layer, and a substrate with electrodes, the base being provided with a substrate for mounting the detection sensing layer, the detection sensing layer being connected to the electrodes on the substrate, the base being disposed within and connected to the detection connection portion;

[0011] The reference module is disposed inside the detection connection portion and includes a cavity, wherein the cavity is disposed inside the detection connection portion and is filled with insulating oil. A second monitoring assembly is disposed inside the cavity; the first monitoring assembly and the second monitoring assembly have the same structure.

[0012] A control module is provided inside the housing and is used to analyze and process the first measurement signal and the second measurement signal monitored by the first monitoring component and the second monitoring component to obtain calibrated measurement information;

[0013] A wireless transmission module is provided inside the housing and is used to transmit the calibrated measurement information of the control module to the remote monitoring platform;

[0014] A power supply, used to supply power to the first monitoring component, the second monitoring component, and the control module;

[0015] The output end control modules of the first monitoring component and the second monitoring component are connected to the wireless transmission module, and the output end of the power supply is connected to the first monitoring component, the second monitoring component, and the control module.

[0016] As a further technical solution of the present invention, the control module includes:

[0017] A signal conditioning module, configured to condition the output signals of the first monitoring component and the second monitoring component to output a first measurement signal and a second measurement signal;

[0018] a controller that performs a differential comparison on the first measurement signal and the second measurement signal sent by the signal conditioning module, and generates a calibrated measurement signal output;

[0019] The alarm output module compares the calibrated measurement signal with the alarm threshold and outputs an alarm signal;

[0020] The output ends of the first monitoring component and the second monitoring component are connected to a signal conditioning module, the output end of the signal conditioning module is connected to a controller, and the output end of the controller is connected to an alarm output module.

[0021] As a further technical solution of the present invention, the detection sensing layer is a palladium film layer or a palladium alloy film layer.

[0022] As a further technical solution of the present invention, the substrate is made of ceramic, glass or thermal insulation polymer material.

[0023] As a further technical solution of the present invention, the shell is made of metal material or plastic material.

[0024] As a further technical solution of the present invention, the power source is a lithium battery.

[0025] As a further technical solution of the present invention, the wireless transmission module adopts a lora transmission module.

[0026] In an embodiment of the present invention, the output signals of the first monitoring component and the second monitoring component are amplified, filtered, and converted and outputted by a signal conditioning module to obtain stable and accurate first measurement signals and second measurement signals. The first measurement signal and the second calibration signal are analyzed and processed by a controller, and the first measurement signal is calibrated and compensated using a differential method. There is no need to set up a temperature compensation module separately, thereby improving the compensation calibration accuracy.

[0027] The present invention also provides a low-power self-checking single hydrogen sensor monitoring method; the method comprises the following steps:

[0028] collecting a first measurement signal in the transformer insulating oil by a first monitoring component;

[0029] collecting a second measurement signal of the insulating oil through a second monitoring component;

[0030] Wherein, the first monitoring component and the second monitoring component both adopt the low-power self-calibration single hydrogen sensor according to claim 1;

[0031] Conditioning the first measurement signal and the second measurement signal to output measurement information and reference information;

[0032] The measurement information is the signal output by the first monitoring component, and the reference information is the signal output by the second monitoring component in the closed cavity with insulating oil;

[0033] Process the measurement information and reference information to output calibrated measurement information;

[0034] The processing is to compare the measurement information with the reference information, and if the difference between the measurement information and the reference information exceeds a preset threshold, an alarm signal is output;

[0035] Transmit the calibrated measurement information to the remote monitoring platform through the wireless transmission module;

[0036] The remote monitoring platform displays and processes the transmitted measurement information and alarm signals.

[0037] As a further technical solution of the present invention, the processing of the measurement information and the reference information to output the calibrated measurement information specifically includes:

[0038] Perform frequency synchronization detection on the measurement information and reference information to extract the amplitude and phase information at the same frequency;

[0039] Perform differential comparison on the amplitude and phase information at the same frequency to determine the environmental error between the measured information and the reference information;

[0040] The measurement information is corrected according to the environmental error to obtain the calibrated measurement information. Beneficial effects

[0041] The beneficial effects of the present invention are:

[0042] The self-calibrating single hydrogen sensor device of the present invention uses a dual detection component to detect hydrogen in transformer insulating oil, and realizes comparison and calibration of measurement information through a control module, thereby outputting high-precision calibrated measurement information, meeting the requirements of high precision and low power consumption. By arranging a benchmark reference module in the hydrogen sensor to form a self-calibration structure, the drift caused by the ambient temperature in the palladium alloy detection can be calibrated. The calibration is performed through differential calculation using a phase-locked method, thereby improving the detection accuracy of the hydrogen sensor. At the same time, no heating and temperature control system is required, thereby reducing the power consumption of the hydrogen sensor and extending the service life of the built-in battery, thus realizing self-calibration, high-precision and low-power consumption hydrogen content monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] FIG1 is a structural diagram of a low-power self-checking single hydrogen sensor device proposed by the present invention;

[0044] FIG2 is a control structure diagram of a low-power self-checking single hydrogen sensor device proposed by the present invention;

[0045] FIG3 is a flow chart of a low-power self-checking single hydrogen sensor monitoring method proposed by the present invention.

[0046] As shown in the figure:

[0047] 1-housing, 2-first monitoring component, 3-reference module, 4-control module, 5-wireless transmission module, 6-power supply;

[0048] 101 - detection connection part, 102 - interface; 201 - base, 202 - detection sensing layer, 203 - substrate; 301 - cavity, 302 - second monitoring component; 401 - signal conditioning module, 402 - controller, 403 - alarm output module. Modes for Carrying Out the Invention

[0049] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in conjunction with the embodiments and drawings to fully understand the purpose, features and effects of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0050] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should have the usual meanings understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0051] As shown in Figures 1 to 3, they show a specific embodiment of the present invention:

[0052] 1 to 3 , a low-power self-checking single hydrogen sensor device is shown; comprising:

[0053] A housing 1 is provided with a detection connection portion 101, and an end of the detection connection portion 101 is provided with an interface 102 for connection to a transformer;

[0054] A first monitoring component 2 is disposed inside the detection connection portion 101. The first monitoring component 2 includes a base 201, a detection sensing layer 202, and a substrate 203 with electrodes. A substrate for mounting the detection sensing layer is disposed on the base 201. The detection sensing layer 202 is connected to the electrodes on the substrate. The base 201 is disposed inside and connected to the detection connection portion.

[0055] The reference module 3 is disposed within the detection connection portion 101 and includes a cavity 301 disposed within the detection connection portion 101. The cavity 301 is filled with insulating oil and a second monitoring assembly 302 is disposed within the cavity 301. The first monitoring assembly 2 and the second monitoring assembly 302 have the same structure.

[0056] The control module 4 is provided inside the housing 1 and is used to analyze and process the first measurement signal and the second measurement signal monitored by the first monitoring component 2 and the second monitoring component 302 to obtain calibrated measurement information;

[0057] The wireless transmission module 5 is provided inside the housing 1 and is used to realize the data transmission between the calibrated measurement information of the control module and the remote monitoring platform;

[0058] Power supply 6, used to supply power to the first monitoring component 2, the second monitoring component 302, and the control module 4;

[0059] The output ends of the first monitoring component 2 and the second monitoring component 302 are controlled by a control module 4 , the control module 4 is connected to the wireless transmission module 5 , and the output end of the power supply 6 is connected to the first monitoring component 2 , the second monitoring component 302 , and the control module 4 .

[0060] The self-calibrating single hydrogen sensor device of the present invention uses a dual detection component to detect hydrogen in transformer insulating oil, and realizes comparison and calibration of measurement information through a control module, thereby outputting high-precision calibrated measurement information, meeting the requirements of high precision and low power consumption.

[0061] The present invention provides a reference module in the hydrogen sensor to form a self-calibration structure, which can calibrate the drift of palladium alloy detection caused by ambient temperature. The calibration is performed through differential calculation using a phase-locked method, thereby improving the detection accuracy of the hydrogen sensor. At the same time, no heating and temperature control systems are required, which reduces the power consumption of the hydrogen sensor and prolongs the service life of the built-in battery. In other words, self-calibration, high-precision, and low-power consumption hydrogen content monitoring is achieved.

[0062] In the embodiment of the present invention, the control module 4 includes:

[0063] The signal conditioning module 401 is used to condition the output signals of the first monitoring component and the second monitoring component to output a first measurement signal and a second measurement signal;

[0064] The controller 402 performs a differential comparison on the first measurement signal and the second measurement signal sent by the signal conditioning module to generate a calibrated measurement signal output;

[0065] The alarm output module 403 compares the calibrated measurement signal with the alarm threshold and outputs an alarm signal;

[0066] The output ends of the first monitoring component and the second monitoring component are connected to a signal conditioning module, the output end of the signal conditioning module is connected to a controller, and the output end of the controller is connected to an alarm output module.

[0067] The present invention uses a signal conditioning module to amplify and filter the first and second measurement signals, improving the signal-to-noise ratio (SNR), reducing the impact of noise, and enhancing detection accuracy. The control module can be configured to periodically calibrate the first monitoring component, adjusting and calibrating it based on monitoring data from a baseline reference module to reduce the impact of environmental factors and improve detection accuracy. An alarm output module is provided to generate an alarm for abnormal conditions, alerting maintenance personnel to promptly repair the problem, ensuring stable and reliable sensor operation and improving detection accuracy.

[0068] In an embodiment of the present invention, the detection sensing layer is a palladium film layer or a palladium alloy film layer, and palladium-nickel alloy can be selected; wherein, the substrate is made of ceramic, glass or thermal insulation polymer material; the outer shell is made of metal material or plastic material, the power supply is a lithium battery, and the wireless transmission module adopts a lora transmission module, 4G, 5G or other wireless transmission modules.

[0069] In an embodiment of the present invention, the output signals of the first monitoring component and the second monitoring component are amplified, filtered, and converted and outputted by a signal conditioning module to obtain stable and accurate first measurement signals and second measurement signals. The first measurement signal and the second calibration signal are analyzed and processed by a controller, and the first measurement signal is calibrated and compensated using a differential method. There is no need to set up a temperature compensation module separately, thereby improving the compensation calibration accuracy.

[0070] 3 , the present invention also provides a low-power self-checking single hydrogen sensor monitoring method, comprising the following steps:

[0071] S1, collecting a first measurement signal in the transformer insulating oil through a first monitoring component;

[0072] S2, collecting a second measurement signal of the insulating oil through a second monitoring component;

[0073] Wherein, the first monitoring component and the second monitoring component both adopt the low-power self-calibration single hydrogen sensor according to claim 1;

[0074] S3, conditioning the first measurement signal and the second measurement signal to output measurement information and reference information;

[0075] The measurement information is the signal output by the first monitoring component, and the reference information is the signal output by the second monitoring component in the closed cavity with insulating oil;

[0076] S4, processing the measurement information and the reference information to output calibrated measurement information;

[0077] The processing is to compare the measurement information with the reference information, and if the difference between the measurement information and the reference information exceeds a preset threshold, an alarm signal is output;

[0078] S5, transmitting the calibrated measurement information to the remote monitoring platform via the wireless transmission module;

[0079] S6, the remote monitoring platform displays and processes the transmitted measurement information and alarm signals.

[0080] In an embodiment of the present invention, the measurement information and reference information are processed to output calibrated measurement information; specifically, the process includes:

[0081] Perform frequency synchronization detection on the measurement information and reference information to extract the amplitude and phase information at the same frequency;

[0082] Perform differential comparison on the amplitude and phase information at the same frequency to determine the environmental error between the measured information and the reference information;

[0083] The measurement information is corrected according to the environmental error to obtain the calibrated measurement information.

[0084] The self-calibrating single hydrogen sensor monitoring method provided by the present invention compares and calibrates the first measurement signal and reference signal collected by dual sensors, outputs the calibrated measurement information, and wirelessly transmits the information to a remote monitoring platform, thereby achieving low-power consumption and high-precision online hydrogen monitoring.

[0085] The present invention has been described in detail above. However, the present invention is not limited to the above-described embodiments. Various modifications may be made within the scope of knowledge of those skilled in the art without departing from the spirit of the present invention. Many other changes and modifications may be made without departing from the spirit and scope of the present invention. It should be understood that the present invention is not limited to the specific embodiments, and the scope of the present invention is defined by the appended claims.

Claims

1. A low power self-checking single hydrogen sensor device, characterized in that: include: A housing, wherein a detection connection portion is disposed on the housing, and an end of the detection connection portion is provided with an interface connected to a transformer; A first monitoring component is arranged inside the detection connection part, the first monitoring component comprises a base body, a detection sensing layer and a substrate with electrodes, a substrate for mounting the detection sensing layer is arranged on the base body, the detection sensing layer is connected to the electrodes on the substrate, and the base body is arranged inside the detection connection part and connected to the detection connection part; The reference module is arranged inside the detection connection part, and comprises a cavity, wherein the cavity is arranged inside the detection connection part, the cavity is filled with insulating oil, and a second monitoring component is arranged inside the cavity; the first monitoring component and the second monitoring component have the same structure; A control module is disposed inside the housing and is used to analyze and process the first measurement signal and the second measurement signal monitored by the first monitoring component and the second monitoring component to obtain calibrated measurement information; A wireless transmission module is arranged inside the housing and is used to realize data transmission between the calibrated measurement information of the control module and the remote monitoring platform; A power supply, used to supply power to the first monitoring component, the second monitoring component, and the control module; The output end control module of the first monitoring component and the second monitoring component is connected to the wireless transmission module, and the output end of the power supply is connected to the first monitoring component, the second monitoring component and the control module.

2. A low power self-checking single hydrogen sensor device according to claim 1, characterized in that: The control module comprises: A signal conditioning module, used for conditioning the output signals of the first monitoring component and the second monitoring component to output a first measurement signal and a second measurement signal; A controller performs a differential comparison on a first measurement signal and a second measurement signal sent by the signal conditioning module to generate a calibrated measurement signal output; An alarm output module compares the calibrated measurement signal with the alarm threshold and outputs an alarm signal; The output ends of the first monitoring component and the second monitoring component are connected to a signal conditioning module, the output end of the signal conditioning module is connected to a controller, and the output end of the controller is connected to an alarm output module.

3. A low power self-checking single hydrogen sensor device according to claim 1, characterized in that: The detection sensing layer is a palladium film layer or a palladium alloy film layer.

4. A low power self-checking single hydrogen sensor device according to claim 1, characterized in that: The substrate is made of ceramic, glass or heat-insulating polymer material.

5. A low power self-checking single hydrogen sensor device according to claim 1, characterized in that: The shell is made of metal material or plastic material.

6. A low power self-checking single hydrogen sensor device according to claim 1, characterized in that: The power source is a lithium battery.

7. A low power self-checking single hydrogen sensor device according to claim 1, characterized in that: The wireless transmission module adopts a lora transmission module.

8. A low power self-checking single hydrogen sensor monitoring method; characterized in that: The following steps are involved: Collecting a first measurement signal in the transformer insulating oil by means of a first monitoring component; Collecting a second measurement signal of the insulating oil through a second monitoring component; Wherein, the first monitoring component and the second monitoring component both adopt the low-power self-calibration single hydrogen sensor according to claim 1; Conditioning the first measurement signal and the second measurement signal to output measurement information and reference information; Wherein, the measurement information is the signal output by the first monitoring component, and the reference information is the signal output by the second monitoring component in the closed cavity with insulating oil; Process the measurement information and reference information to output calibrated measurement information; The processing is to compare the measured information with the reference information, and if the difference between the measured information and the reference information exceeds a preset threshold, an alarm signal is output; The calibrated measurement information is transmitted to the remote monitoring platform via the wireless transmission module; The remote monitoring platform displays and processes the transmitted measurement information and alarm signals.

9. A low power self-checking single hydrogen sensor monitoring method according to claim 8, characterized in that: The measurement information and the reference information are processed to output calibrated measurement information; Specifically include: Perform frequency synchronization detection on the measurement information and the reference information to extract the amplitude and phase information at the same frequency; Perform differential comparison on the amplitude and phase information at the same frequency to determine the environmental error between the measured information and the reference information; The measurement information is corrected according to the environmental error to obtain the calibrated measurement information.

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