Thermometer failure automatic discrimination device

Abstract

The application discloses a thermometer fault automatic discrimination device and relates to the technical field of power auxiliary tools.The thermometer fault automatic discrimination device comprises an induction device and a fault discrimination device, wherein the induction device is connected with the fault discrimination device; the induction device comprises an angle sensor and a current sampling unit, and the induction device is connected with a thermometer to be measured; the fault discrimination device comprises an equipment box, and a receiving module, a discrimination module, a digital display module and a warning module are arranged in the equipment box; the receiving module is connected with the discrimination module, and the discrimination module is connected with the digital display module. The thermometer fault automatic discrimination device can remotely and intelligently determine whether a thermometer is faulty, can change an original on-site checking mode into a remote monitoring mode, can check whether the equipment state is normal at a terminal, greatly shortens the equipment maintenance cycle and can monitor the equipment health state in real time.

Description

Technical Field

[0001] This invention relates to the field of power auxiliary tools technology, and in particular to an automatic thermometer fault detection device. Background Technology

[0002] Currently, all operating main transformers are equipped with thermometers for real-time monitoring of transformer temperature. The fault diagnosis method for this type of equipment mainly relies on operation and inspection personnel to conduct regular inspections. After a fault is discovered, maintenance personnel are notified to conduct on-site inspection, analysis, judgment, and handling. Because there are many causes of faults in this type of equipment, such as thermometer body bulb failure, PT100 thermometer failure, temperature transmitter failure, and temperature display instrument failure, it has been found during the inspection process that the inspection cycle is long and the equipment health status cannot be monitored in real time. This results in a long fault diagnosis cycle, lagging equipment operation and maintenance methods, and the inability to monitor the equipment health status in real time.

[0003] Currently, there is no means of remotely and automatically diagnosing faults. Maintenance personnel must receive notification of equipment defects from operators, submit a repair plan, and then go to the site for comprehensive analysis and judgment to determine the type of equipment defect. Based on the defect type, appropriate measures are then provided. However, when dealing with such defects, it is impossible to determine the specific cause of the fault in advance. Generally, all possible spare parts that could cause the fault must be carried, causing transportation inconvenience. Furthermore, this method has an excessively long processing cycle and slow troubleshooting speed, resulting in prolonged equipment operation with defects. In addition, due to the variety of thermometer fault types, the demand for spare parts is extremely high. Some spare parts can only be procured after the defect is discovered. Since the routine station inspection cycle is long, if such defects are not discovered and reported in a timely manner, it will cause delays in spare parts procurement and extend the equipment troubleshooting cycle.

[0004] Currently, most thermometer malfunctions require handling in conjunction with power outage plans. Power outage maintenance plans must be reported one week in advance. If malfunctions are not detected and diagnosed in a timely manner, the troubleshooting process will be lengthy and slow.

[0005] Therefore, there is an urgent need to design a new automatic fault detection device for thermometers to solve the above problems. Summary of the Invention

[0006] The technical problem to be solved by this invention is to overcome the shortcomings of the existing technology and design a new automatic thermometer fault detection device. This automatic thermometer fault detection device has a perfect structure and solves the problem that the existing thermometer fault detection can only be carried out on-site, resulting in the equipment running "with faults" for a long time. This device does not require on-site inspection and can accurately know whether the status of the transformer thermometer on site is normal just by monitoring the signal from the background machine.

[0007] The solution adopted by this invention to solve its technical problem is as follows:

[0008] An automatic fault detection device for thermometers, characterized in that it comprises a sensing device and a fault detection device, wherein the sensing device is connected to the fault detection device;

[0009] The sensing device includes an angle sensor and a current sampling unit, and the sensing device is connected to the thermometer to be measured;

[0010] The fault diagnosis device includes an equipment box, which contains a receiving module, a diagnosis module, a digital display module, and an alarm module. The receiving module is connected to the diagnosis module, the diagnosis module is connected to the digital display module, and the digital display module is connected to the alarm module.

[0011] In a preferred embodiment of the present invention, the receiving module includes an angle sensor (10) receiving module and a thermometer PT100 receiving module; the discrimination module includes a thermometer PT100 discrimination module, a temperature display instrument discrimination module, a temperature transmitter discrimination module, and a thermometer discrimination module; the digital display module includes an angle sensor digital display module, a thermometer PT100 digital display module, a temperature display instrument digital display module, a temperature transmitter digital display module, and a thermometer PT100 fault digital display module;

[0012] The angle sensor receiving module is connected to the angle sensor digital display module, and the PT100 thermometer receiving module is connected to the PT100 thermometer digital display module. The angle sensor digital display module is connected to the PT100 thermometer discrimination module, the temperature display instrument discrimination module, and the temperature transmitter discrimination module. The PT100 thermometer digital display module is connected to the PT100 thermometer discrimination module. The PT100 thermometer discrimination module is connected to the PT100 thermometer fault digital display module, the temperature display instrument discrimination module is connected to the temperature display instrument digital display module, and the temperature transmitter discrimination module is connected to the temperature transmitter digital display module. The PT100 thermometer fault digital display module, the temperature display instrument digital display module, and the temperature transmitter digital display module are each connected to the thermometer discrimination module. The thermometer discrimination module is connected to the warning module.

[0013] In a preferred embodiment of the present invention, the current sampling unit includes a transmitter output sampling unit and a temperature display output sampling unit. The angle sensor is fixed on the thermometer to be measured. The transmitter output sampling unit is connected to the transmitter of the thermometer to be measured, and the temperature display output sampling unit is connected to the temperature display of the thermometer to be measured.

[0014] In a preferred embodiment of the present invention, the angle sensor is connected to the angle sensor receiving module, the transmitter output sampling unit is connected to the temperature transmitter discrimination module, and the temperature display output sampling unit is connected to the temperature display discrimination module.

[0015] In a preferred embodiment of the present invention, the fault diagnosis device is provided with a wireless module, and the fault diagnosis device is connected to the terminal through the wireless module.

[0016] In a preferred embodiment of the present invention, a display screen is provided on the outside of the equipment box, and the angle sensor digital display module, the thermometer PT100 digital display module, the temperature display instrument digital display module, the temperature transmitter digital display module and the thermometer PT100 fault digital display module are respectively connected to the display screen.

[0017] In a preferred embodiment of the present invention, the warning module is provided with an indicator light, which is located on the outside of the equipment box.

[0018] In a preferred embodiment of the present invention, the equipment box includes a box body and a box lid, which are connected by hinges.

[0019] In a preferred embodiment of the present invention, the housing is provided with a transparent screen.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) This invention can remotely and intelligently determine whether the thermometer is faulty, changing the original on-site verification method to a remote monitoring method. The device status can be viewed on the terminal, greatly shortening the equipment maintenance cycle and monitoring the health status of the device in real time.

[0022] (2) The present invention improves the equipment condition maintenance mode. If the thermometer of the equipment on site fails, it does not need to be discovered by the operation and maintenance personnel. The fault identification device can automatically detect and analyze the fault to determine whether a signal is uploaded. Based on the operation and maintenance experience, it can accurately determine whether the fault belongs to the thermometer body, temperature transmitter or temperature display instrument. Then, the corresponding maintenance plan, maintenance equipment and spare parts can be prepared in advance to accurately and efficiently handle equipment faults.

[0023] (2) The present invention does not change the original state of the thermometer. It only sets an angle sensor on the thermometer by snap-fit ​​embedding and installs a current sampling unit at the output end of the temperature transmitter and temperature display instrument, which has no effect on the normal display state of the thermometer.

[0024] (4) Once the device is installed, it can monitor itself and send the test results to the terminal without the need for staff to manually turn it on.

[0025] (5) The invention is relatively inexpensive, economical, and more easily accepted by users. Attached Figure Description

[0026] Figure 1 This is an overall schematic diagram of the automatic thermometer fault detection device proposed in this invention;

[0027] Figure 2 This is a schematic diagram of the installation structure of the current sampling unit of the automatic thermometer fault detection device proposed in this invention;

[0028] Figure 3 This is a rear view of the equipment box for the automatic thermometer fault detection device proposed in this invention.

[0029] Figure 4 This is a schematic diagram of the discrimination logic of the automatic thermometer fault detection device proposed in this invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1-Sensing device, 2-Fault diagnosis device, 10-Angle sensor, 20-Equipment box, 21-Display screen, 22-Indicator light, 23-Box body, 24-Box cover, 25-Transparent screen. Detailed Implementation

[0032] The specific embodiments of the present invention are described below with reference to the accompanying drawings and examples:

[0033] It should be noted that the structures, colors, proportions, sizes, etc. shown in the accompanying drawings are only used to complement the content disclosed in the specification, so that those skilled in the art can understand and read them, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0034] At the same time, in the description of the present invention, it should be understood that the terms "one end", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0035] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] like Figures 1-4 As shown, the automatic fault detection device for thermometers of the present invention includes a sensing device 1 and a fault detection device 2. The sensing device 1 is fixed on the thermometer to be tested and is connected to the fault detection device 2. The sensing device 1 transmits the monitored data to the fault detection device 2, and the fault detection device 2 automatically analyzes and detects the transmitted data without the need for manual operation by the staff. After detection, the results are uploaded.

[0038] The sensing device 1 includes an angle sensor 10 and a current sampling unit, and the sensing device is connected to the thermometer to be measured; the fault detection device 2 includes an equipment box 20, which contains a receiving module, a detection module, a digital display module and an alarm module; the receiving module is connected to the detection module, the detection module is connected to the digital display module, and the digital display module is connected to the alarm module.

[0039] The receiving module, discrimination module, digital display module, and warning module are placed inside the equipment box 1 to ensure cleanliness and protect the device. The receiving module receives data transmitted from the sensing device 1. The fault discrimination device 2 analyzes and discriminates the data transmitted by the receiving module, and then transmits the discrimination result to the digital display module. The digital display module is connected to the warning module, and displays the overall discrimination result of the thermometer on the equipment box 20. When observing, you only need to look at the result displayed on the equipment box 20. There is no need to test other components, as the device will automatically perform the detection and discrimination.

[0040] The receiving module includes an angle sensor receiving module and a PT100 thermometer receiving module; the discrimination module includes a PT100 thermometer discrimination module, a temperature display instrument discrimination module, a temperature transmitter discrimination module, and a thermometer discrimination module; the digital display module includes an angle sensor digital display module, a PT100 thermometer digital display module, a temperature display instrument digital display module, a temperature transmitter digital display module, and a PT100 thermometer fault digital display module.

[0041] Angle sensor 10 is installed at the rotating shaft of the thermometer pointer. It sends the actual temperature of the thermometer pointer to the angle sensor receiving module in terms of angle. Before use, it is necessary to perform angle positioning with the angle sensor receiving module. The angle sensor receiving module is built into the fault diagnosis device 2. Since the normal temperature upper and lower limits of the thermometer are 0~150℃ / 0~160℃, the temperature corresponding to each degree of the angle sensor 10 is displayed digitally on the display screen 21 set on the outside of the equipment box 20 with built-in fault diagnosis device 2 through on-site setting selection.

[0042] The PT100 signal line of the thermometer body sends the actual resistance value of the PT100 thermometer to the PT100 receiving module; the PT100 signal receiving module, which is built into the fault diagnosis device 2, converts the PT100 signal into a temperature value and sends the temperature value to the PT100 digital display module, which displays the value on the display screen 21 set on the outside of the equipment box 20 of the built-in fault diagnosis device 2.

[0043] The angle sensor receiving module is connected to the angle sensor digital display module, and the PT100 thermometer receiving module is connected to the PT100 thermometer digital display module. The angle sensor digital display module is connected to the PT100 thermometer discrimination module, the temperature display instrument discrimination module, and the temperature transmitter discrimination module. The PT100 thermometer digital display module is connected to the PT100 thermometer discrimination module. The PT100 thermometer discrimination module is connected to the PT100 thermometer fault digital display module, the temperature display instrument discrimination module is connected to the temperature display instrument digital display module, and the temperature transmitter discrimination module is connected to the temperature transmitter digital display module. The PT100 thermometer fault digital display module, the temperature display instrument digital display module, and the temperature transmitter digital display module are each connected to the thermometer discrimination module. The thermometer discrimination module is connected to the warning module.

[0044] Angle sensor 10 is connected to angle sensor receiving module, which sends the angle of rotation of thermometer pointer to angle sensor receiving module. Transmitter output sampling unit is connected to temperature transmitter discrimination module. Temperature display output sampling unit is connected to temperature display discrimination module, which sends the corresponding data to discrimination module, so that discrimination module can make discrimination based on data.

[0045] The warning module is equipped with an indicator light 22, which is located on the outside of the equipment box 20, so that the results can be seen without opening the device.

[0046] An angle sensor 10 is installed at the pointer shaft of the thermometer. Based on the actual temperature range measured by the thermometer, the factory setting for conventional thermometers is 0~150℃ / 0~160℃. The angle sensor receiving module is then set to 0~150℃ / 0~160℃, and angle positioning is performed to accurately ensure that the temperature displayed on the angle sensor digital display module matches the temperature indicated by the thermometer pointer. The resistance value of the PT100 resistor on the thermometer body is connected to the PT100 receiving module via a cable, and the temperature value is displayed digitally on the PT100 digital display module. The temperature displayed by the digital display module is transmitted to the PT100 thermometer discrimination module. The PT100 thermometer discrimination module receives data from both the angle sensor digital display module and the PT100 thermometer digital display module, and analyzes them. Using the temperature displayed by the angle sensor digital display module as a reference, the PT100 thermometer discrimination module compares the temperatures displayed by the angle sensor digital display module and the PT100 thermometer digital display module, and displays the temperature difference in the PT100 fault display window. If the temperature difference is less than 5°C, it is considered normal; if the temperature difference is greater than 5°C, it is considered faulty.

[0047] The current sampling unit includes a transmitter output sampling unit and a temperature display output sampling unit. Angle sensor 10 is fixed on the thermometer to be measured. The transmitter output sampling unit is connected to the transmitter of the thermometer to be measured, and the temperature display output sampling unit is connected to the temperature display of the thermometer to be measured.

[0048] A transmitter output sampling unit is installed at the 4-20mA current output terminal of the temperature transmitter to send the current output value of the temperature transmitter to the temperature transmitter discrimination module. The output value is converted into a temperature value. If the temperature display window of the PT100 thermometer is normal, the temperature displayed by the angle sensor digital display module is used as the reference. The temperature transmitter discrimination module compares the temperature displayed by the angle sensor digital display module with the temperature transmitted by the transmitter output sampling unit and displays the temperature difference through the temperature transmitter digital display module. If the temperature difference is <5℃, it is displayed as normal; if the temperature difference is >5℃, it is displayed as faulty.

[0049] Then, a sampling unit for the output terminal of the temperature display instrument is installed at the 4-20mA output terminal. The operation steps are the same as those for the temperature transmitter. The temperature difference is displayed through the digital display module of the temperature display instrument. If the temperature difference is <5℃, it is normal; if the temperature difference is >5℃, it is faulty.

[0050] Finally, the fault detection device 2 uses AND logic to determine if all three signals displayed by the PT100 fault digital display module, the temperature transmitter digital display module, and the temperature display instrument digital display module are normal. If all three signals are normal, it sends a normal signal to the warning module, the indicator light 22 lights up green, and a normal thermometer signal is sent to the terminal. If any one of the three signals displayed by the PT100 fault digital display module, the temperature transmitter digital display module, and the temperature display instrument digital display module is abnormal, it sends a thermometer fault signal, the indicator light 22 lights up red, and then sends the fault status of the PT100 fault digital display window, the temperature transmitter fault digital display window, and the temperature display instrument fault digital display window to the terminal.

[0051] The device performs analysis and judgment automatically without the need for manual operation by staff. Staff only need to observe the terminal to remotely monitor the thermometer and achieve real-time monitoring.

[0052] The fault diagnosis device 2 is equipped with a wireless module. The fault diagnosis device 2 connects to the terminal through the wireless module and sends data to the terminal wirelessly to realize remote monitoring. The wireless module includes a transmitter and a receiver. The transmitter converts the analyzed and diagnosed data into radio waves and sends them to the receiver. The receiver receives these radio waves and converts them into usable electrical signals. During the transmission process, the microprocessor processes the analyzed and diagnosed data and formats it into a data format that can be transmitted.

[0053] The equipment box 20 has a display screen 21 on its outside. The angle sensor digital display module, the PT100 thermometer digital display module, the temperature display instrument digital display module, the temperature transmitter digital display module, and the PT100 thermometer fault digital display module are respectively connected to the display screen. The angle sensor digital display module and the PT100 thermometer fault digital display module display the monitored temperature as data on the display screen 21. The temperature display instrument digital display module, the temperature transmitter digital display module, and the PT100 thermometer fault digital display module display the results after analysis and judgment on the display screen 21. The observation is simple and convenient.

[0054] The equipment box 20 includes a box body 23 and a box cover 24, which are connected by hinges. When the device malfunctions, the box cover 24 can be opened for monitoring without disassembly.

[0055] The enclosure 23 is equipped with a transparent screen 25, which allows the internal components to be seen from the outside of the enclosure 23, preventing the device from failing to display faults such as leakage inside the enclosure 23 in a timely manner.

[0056] In another embodiment of the present invention, the angle sensor 10 may be replaced by a magnetic induction sensor or an attitude sensor.

[0057] In another embodiment of the present invention, the thermometer PT100 signal receiving device is also located outside the fault detection device 2.

[0058] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

[0059] Many other changes and modifications can be made without departing from the concept and scope of this invention. It should be understood that this invention is not limited to the specific embodiments, and the scope of this invention is defined by the appended claims.

Claims

1. An automatic fault detection device for thermometers, characterized in that, It includes a sensing device (1) and a fault detection device (2), wherein the sensing device (1) is connected to the fault detection device (2); The sensing device (1) includes an angle sensor (10) and a current sampling unit, and the sensing device is connected to the thermometer to be measured; The fault detection device (2) includes an equipment box (20), which contains a receiving module, a detection module, a digital display module and an alarm module; the receiving module is connected to the detection module and the detection module is connected to the digital display module. The receiving module includes an angle sensor (10) receiving module and a thermometer PT100 receiving module; the discrimination module includes a thermometer PT100 discrimination module, a temperature display instrument discrimination module, a temperature transmitter discrimination module, and a thermometer discrimination module; the digital display module includes an angle sensor digital display module, a thermometer PT100 digital display module, a temperature display instrument digital display module, a temperature transmitter digital display module, and a thermometer PT100 fault digital display module; The angle sensor receiving module is connected to the angle sensor digital display module, and the PT100 thermometer receiving module is connected to the PT100 thermometer digital display module. The angle sensor digital display module is connected to the PT100 thermometer discrimination module, the temperature display instrument discrimination module, and the temperature transmitter discrimination module. The PT100 thermometer digital display module is connected to the PT100 thermometer discrimination module. The PT100 thermometer discrimination module is connected to the PT100 thermometer fault digital display module, the temperature display instrument discrimination module is connected to the temperature display instrument digital display module, and the temperature transmitter discrimination module is connected to the temperature transmitter digital display module. The PT100 thermometer fault digital display module, the temperature display instrument digital display module, and the temperature transmitter digital display module are each connected to the thermometer discrimination module. The thermometer discrimination module is connected to the warning module. The current sampling unit includes a transmitter output sampling unit and a temperature display output sampling unit. The angle sensor (10) is fixed on the thermometer to be measured. The transmitter output sampling unit is connected to the transmitter of the thermometer to be measured, and the temperature display output sampling unit is connected to the temperature display of the thermometer to be measured.

2. The automatic thermometer fault detection device as described in claim 1, characterized in that, The angle sensor (10) is connected to the angle sensor receiving module, the transmitter output sampling unit is connected to the temperature transmitter discrimination module, and the temperature display output sampling unit is connected to the temperature display discrimination module.

3. The automatic thermometer fault detection device as described in claim 1, characterized in that, The fault detection device (2) is equipped with a wireless module, and the fault detection device (2) is connected to the terminal through the wireless module.

4. The automatic thermometer fault detection device as described in claim 1, characterized in that, The equipment box (20) is equipped with a display screen (21) on the outside. The angle sensor digital display module, the thermometer PT100 digital display module, the temperature display instrument digital display module, the temperature transmitter digital display module and the thermometer PT100 fault digital display module are respectively connected to the display screen (21).

5. The automatic thermometer fault detection device as described in claim 1, characterized in that, The warning module is equipped with an indicator light (22), which is located on the outside of the equipment box (20).

6. The automatic thermometer fault detection device as described in claim 1, characterized in that, The equipment box (20) includes a box body (23) and a box lid (24), which are connected by hinges.

7. The automatic thermometer fault detection device as described in claim 6, characterized in that, The housing (23) is equipped with a transparent screen (25).

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