Cabinet body temperature measuring device and temperature measuring method

Abstract

The invention relates to the technical field of cabinet body monitoring, in particular to a cabinet body temperature measuring device and method.The cabinet body temperature measuring device comprises a cabinet body and further comprises a guide rail, a driving motor, a temperature collecting module, a driver, a displayer, a control module and a power module, the vertically-arranged guide rail is fixedly installed on the inner side of the front portion of the cabinet body, and a sliding block is installed on the outer side of the guide rail in a sliding mode; the inner side of the upper part of the cabinet body is fixedly provided with a driving motor which enables the slide block to move up and down. The side surface of the slide block is fixedly provided with a temperature acquisition module. The device is reasonable and compact in structure, the guide rail and the sliding block are arranged, and the driving motor drives the sliding block mounted on the guide rail to drive the sensor to move, so that the monitoring position can be adjusted, and the monitoring range is expanded. According to the invention, the monitoring range of the cabinet body can be expanded, maintenance personnel can timely find the problems of device heating and the like caused by virtual connection, overload, falling off and the like, and a more reliable guarantee is provided for normal operation of equipment in the power industry.

Description

Technical Field

[0001] The invention relates to the technical field of temperature monitoring of equipment in the electric power industry, and relates to a cabinet temperature measuring device and a temperature measuring method. Background Art

[0002] Currently, the sensors used in the field of internal temperature monitoring of cabinets include point temperature measurement and line temperature measurement. Point temperature measurement can only monitor the temperature at a certain monitoring point, while line temperature measurement can only monitor the temperature on a line. In addition to point temperature measurement and line temperature measurement, thermal imagers are also used for surface temperature measurement, but they are less used.

[0003] If you want to obtain detailed and accurate temperature information, you need to set up multiple sensors of both point temperature measurement and line temperature measurement to meet the requirements. The existing thermal imager products on the market are either too expensive and not suitable for monitoring a large number of equipment (especially inside cabinets) in power systems, or the products are positioned for civilian use and are not suitable for direct application in the power industry. For example, the handheld installation form cannot be installed inside the power cabinet, and the data transmission form uses a card to store data or has a display screen, but cannot meet the real-time communication requirements of the power industry, or the applicable ambient temperature range is narrow. Summary of the invention

[0004] The present invention provides a cabinet temperature measuring device and a temperature measuring method, which overcome the deficiencies of the above-mentioned prior art and can effectively solve the problems that the existing temperature monitoring equipment applied to the power industry cannot be installed in the cabinet and has high cost.

[0005] One of the technical solutions of the present invention is achieved through the following measures: a cabinet temperature measuring device, including a cabinet, and also including a guide rail, a drive motor, a temperature acquisition module, a driver, a display, a control module and a power module. A vertically arranged guide rail is fixedly installed on the inner side of the front of the cabinet, and a slider is slidably installed on the outer side of the guide rail. A drive motor that can move the slider up and down is fixedly installed on the inner side of the upper part of the cabinet, and a temperature acquisition module is fixedly installed on the side of the slider. The temperature acquisition module includes a temperature sensor, a camera and a shell fixedly installed on the side of the slider. The side of the shell close to the cabinet surface is provided with a collection hole connected inside and outside, and the temperature sensor and the camera are fixedly installed at intervals in the shell corresponding to the position of the collection hole. The temperature sensor and the camera are both connected to the control module fixedly installed in the shell, the control module is respectively connected to the display and the driver, and the driver is respectively connected to the drive motor and the power module.

[0006] The following is a further optimization and / or improvement of one of the above-mentioned technical solutions:

[0007] The above temperature sensor is a 32*24 dot matrix infrared temperature sensor.

[0008] The second technical solution of the present invention is achieved by the following measures: a temperature measurement method, comprising the following steps:

[0009] Move the slider to the position to be tested and stop;

[0010] Collect temperature data inside the cabinet;

[0011] Collect image information from the inside of the cabinet and combine the image information with temperature data to generate the final image;

[0012] Send the final image to the display.

[0013] The following is a further optimization and / or improvement of the second technical solution of the above invention:

[0014] The temperature data collected inside the cabinet may include:

[0015] When the probe of the temperature sensor is opposite to the front side of the cabinet, the temperature data collected by the temperature sensor is the temperature data of the cabinet;

[0016] When the probe of the temperature sensor is in the same direction as the front side of the cabinet, a reflection plate is set on the front side of the collection cabinet, and the temperature data collected by the temperature sensor through the reflection plate is the temperature data of the cabinet.

[0017] The above-mentioned acquisition of image information of the inner side of the cabinet and merging the image information with the temperature data to generate a final picture may include:

[0018] Convert the collected original image into a bitmap;

[0019] Add text information to the bitmap;

[0020] Convert the bitmap with text information into a process picture;

[0021] Convert temperature data into thumbnails;

[0022] The final image is generated by adding the thumbnail to the additional information of the process image.

[0023] The above-mentioned conversion of temperature data into thumbnail images may include:

[0024] Step 1: Convert the temperature value into a color map. According to the temperature value of the current point and the upper and lower limits of the system temperature, use the following formula to obtain the T value:

[0025]

[0026] When the T value is less than 64, the T value is converted into a set of RGB format color values ​​using the following formula:

[0027]

[0028] When the T value is less than 127 and greater than or equal to 64, the T value is converted into a set of RGB format color values ​​using the following formula:

[0029]

[0030] When the T value is less than 191 and greater than or equal to 127, the T value is converted into a set of RGB format color values ​​using the following formula:

[0031]

[0032] When the T value is less than or equal to 255 and greater than or equal to 191, the T value is converted into a set of RGB format color values ​​using the following formula:

[0033]

[0034] Step 2: Convert the color map to a thumbnail. Convert the 32x24 point temperature data to color points, then expand it to a 160x120 dot matrix and generate a thumbnail.

[0035] The present invention has a reasonable and compact structure. By setting a guide rail and a slider, a driving motor drives the slider installed on the guide rail to move the sensor, so that the monitoring position can be adjusted, thereby expanding the monitoring range. The present invention can expand the monitoring range of the cabinet, enable maintenance personnel to promptly discover problems such as heating of the device caused by virtual connection, overload, shedding, etc., and provide more reliable protection for the normal operation of equipment in the power industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Attached Figure 1 It is a schematic diagram of the front cross-sectional structure of the first embodiment of the present invention.

[0037] Attached Figure 2 This is a schematic diagram of the circuit structure of Embodiment 1 of the present invention.

[0038] Attached Figure 3 This is a circuit diagram of the processor (calendar clock, motor interface) in the second embodiment of the present invention.

[0039] Attached Figure 4 4 is a circuit diagram of a memory in Embodiment 2 of the present invention.

[0040] Attached Figure 5 This is a circuit diagram of the temperature sensor in the second embodiment of the present invention.

[0041] Attached Figure 6 This is a circuit diagram of the backup TTL / 485 communication in the second embodiment of the present invention.

[0042] Attached Figure 7 This is a circuit diagram of voltage conversion in Embodiment 2 of the present invention.

[0043] Attached Figure 8 This is a circuit diagram of the camera cable interface in the second embodiment of the present invention.

[0044] Attached Fig. 9 A circuit diagram for powering the camera in Embodiment 2 of the present invention.

[0045] Attached Fig.10 This is a circuit diagram of the camera crystal oscillator and flashlight in the second embodiment of the present invention.

[0046] Attached Fig.11 This is a circuit diagram of the network driver in the second embodiment of the present invention.

[0047] Attached Fig.12 This is a circuit diagram for power supply in Embodiment 2 of the present invention.

[0048] Attached Fig.13 This is a circuit diagram of the network transformer in the second embodiment of the present invention.

[0049] Attached Fig.14 This is a circuit diagram of the network interface in the second embodiment of the present invention.

[0050] The codes in the attached drawings are: 1 is the cabinet, 2 is the guide rail, 3 is the driving motor, 4 is the slider, 5 is the shell, and 6 is the collection hole. DETAILED DESCRIPTION

[0051] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0052] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The layout is described in detail, such as the positional relationship of front, back, top, bottom, left, right, etc., which is based on the attached manual. Figure 1 The layout direction is determined by the

[0053] The present invention will be further described below in conjunction with embodiments and drawings:

[0054] Embodiment 1: As shown in the attached Figure 1 , 2As shown, the cabinet temperature measuring device includes a cabinet 1, and also includes a guide rail 2, a drive motor 3, a temperature acquisition module, a driver, a display, a control module and a power module. A vertically arranged guide rail 2 is fixedly installed on the inner side of the front of the cabinet 1, and a slider 4 is slidably installed on the outer side of the guide rail 2. A drive motor 3 that can move the slider 4 up and down is fixedly installed on the inner side of the upper part of the cabinet 1. A temperature acquisition module is fixedly installed on the side of the slider 4. The temperature acquisition module includes a temperature sensor, a camera and a shell 5 fixedly installed on the side of the slider 4. The side of the shell 5 close to the surface of the cabinet 1 is provided with a collection hole 6 connected inside and outside. The temperature sensor and the camera are fixedly installed at intervals in the shell 5 corresponding to the position of the collection hole 6. The temperature sensor and the camera are both connected to the control module fixedly installed in the shell 5, the control module is respectively connected to the display and the driver, and the driver is respectively connected to the drive motor 3 and the power module.

[0055] According to the requirements, the camera is an existing well-known technology, such as the OV2640 camera, which is a 1 / 4 inch CMOS UXGA (1632*1232) image sensor. The sensor is small in size and low in operating voltage. It provides the functions of a single-chip UXGA camera and an image processor. Through the SCCB bus control (IIC bus), it can output various resolution 8 / 10-bit image data in the form of full frame, sub-sampling, zooming and windowing. The distance between the camera and the components in the cabinet 1 is less than 80cm. In this way, the temperature sensor and the camera can meet the measurement requirements of most power cabinets 1, and can monitor the power devices (such as circuit breakers and terminal blocks) in the cabinet 1. The guide rail 2, the drive motor 3 and the slider 4 constitute the existing well-known NC-22102109 linear module. For switch cabinets of larger sizes, by setting the guide rail 2 and the slider 4, the drive motor 3 drives the slider 4 installed on the guide rail 2 to move the position with the temperature sensor and the camera, so that the monitoring position can be adjusted, thereby expanding the monitoring range. In this embodiment, the guide rail 2 and the drive motor 3 are installed in the cabinet door of the cabinet 1. Compared with the existing point temperature measurement and line temperature measurement sensors, the present invention can expand the monitoring range of the cabinet 1, enable maintenance personnel to promptly discover problems such as device heating caused by false connection, overload, and shedding, and provide more reliable protection for the normal operation of equipment in the power industry.

[0056] The above cabinet temperature measuring device can be further optimized and / or improved according to actual needs:

[0057] Embodiment 2: As an optimization of the above embodiment, as shown in the attached Figure 1 , 2 As shown, the temperature sensor is a 32*24 dot matrix infrared temperature sensor.

[0058] According to the demand, the 32*24 dot matrix infrared temperature sensor is an existing well-known technology, model MLX90640. This temperature sensor is a 32x24 pixel array, which can provide a wide field of view and is suitable for a variety of application scenarios. Its nano-scale process enhances thermal sensitivity, can capture tiny temperature differences, and provide accurate temperature data at a low cost.

[0059] As attached Figures 3 to 14 As shown in the figure, the hardware functions of each part are as follows: processor, CPU, handles various operation logics, temperature sensor and camera are connected to the processor, and the processor is connected to the memory, display and driver respectively; memory (processor and memory form a control module), extended RAM, used to store data generated during temperature measurement and photo taking, RAM using SPI interface; infrared dot matrix, used for infrared temperature measurement, is a 32x24 dot matrix sensor; spare TTL / 485 communication, used for device debugging interface; voltage conversion, converting POE power supply voltage into 3.3V working power supply used by chip; camera cable interface, connected to camera; camera power supply, providing multiple power for camera The camera crystal oscillator provides the camera operating frequency; the flash provides a light source and provides illumination when taking pictures in the closed cabinet 1; the network driver provides the network interface logic function; the power supply is dual power supply, POE is the power supply used by the official product, and the P2 interface provides a backup debugging power supply; the network transformer provides isolation between the network interface and the connection, and at the same time leads to the POE power interface; the network interface is used to insert the network cable interface (crystal head); the calendar clock provides power for the system calendar time, and can still keep the clock running when there is no external power; the motor interface provides a motor drive interface for controlling the running status of the motor (start and stop, running speed, rotation direction, etc.).

[0060] If the network access end is close to cabinet 1, you can directly connect the network cable to cabinet 1, and couple the network signal to the POE network cable through the POE power supply. If the distance is far, you need to use a fiber-to-network converter with POE function, connect one end to the optical fiber, and the other end to the sensor. At the other end of the network cable, run the master station software to display and manage the data.

[0061] Embodiment 3: As shown in the attached Figure 1 As shown, the temperature measurement method includes the following steps:

[0062] Move the slider 4 to the position to be tested and stop;

[0063] Collect temperature data inside cabinet 1;

[0064] Collect image information of the inside of the cabinet 1, and combine the image information with the temperature data to generate a final image;

[0065] Send the final image to the display.

[0066] During operation, after the processor of the control module is powered on, the processor initializes each peripheral device (memory, network driver, camera, 485 communication, etc.), and at the same time resets the drive motor 3 through the driver, that is, the slider 4 moves to the initial position; collects data at the target position at regular intervals and stores it in the memory, the processor receives the data, analyzes and processes the data command, performs the corresponding operation, and feeds back the operation result to the display in the form of communication. The user can set parameters, query data and issue commands to the processor through the display. When taking pictures, first control the drive motor 3 to move to the specified position, start the flash, and after the light is stable for a short period of time (such as 2ms), start the camera to take pictures, and after the picture is taken, turn off the flash; after each picture is taken, the temperature data and the picture need to be synthesized together, and the result is stored in the memory.

[0067] During use, the user uses the display to read new infrared temperature measurement data every once in a while, and can issue a photo command as needed, and return to confirm after the photo is taken; the stored image information can also be read; and the position of the sensor in the guide rail 2 can also be controlled.

[0068] The above temperature measurement method can be further optimized and / or improved according to actual needs:

[0069] Embodiment 4: As an optimization of the above embodiment, as shown in the attached Figure 1 , 2 As shown, collecting the temperature data inside the cabinet 1 includes:

[0070] When the probe of the temperature sensor is opposite to the front side of the cabinet 1, the temperature data collected by the temperature sensor is the temperature data of the cabinet 1;

[0071] When the probe of the temperature sensor is in the same direction as the front side of the cabinet 1 , a reflection plate is arranged on the front side of the collection cabinet 1 , and the temperature data collected by the temperature sensor through the reflection plate is the temperature data of the cabinet 1 .

[0072] Under normal circumstances, the temperature sensor measures the object to be measured by pointing the probe directly at it. At this time, the infrared light of the object to be measured will be directly received by the probe, that is, a vertically arranged guide rail 2 is fixedly installed on the inner front side of the cabinet 1, a slider 4 is slidably installed on the outer rear side of the guide rail 2, a driving motor 3 that can move the slider 4 up and down is fixedly installed on the inner upper side of the cabinet 1, a shell 5 is fixedly installed on the right side of the slider 4, and a collection hole 6 that is connected to the inside and outside is provided on the rear side of the shell 5.

[0073] However, under the condition of limited installation space, this installation method cannot be used. In this case, the infrared light can be reflected by the reflective plate (304 stainless steel) and then enter the probe on the same side as the object to be measured, that is, a vertically arranged guide rail 2 is fixedly installed on the inner side of the front of the cabinet 1, a slider 4 is slidably installed on the outer side of the front of the guide rail 2, a driving motor 3 that can move the slider 4 up and down is fixedly installed on the inner side of the upper part of the cabinet 1, a housing 5 is fixedly installed on the right side of the slider 4, a collection hole 6 connected inside and outside is provided on the front side of the housing 5, and a reflective plate fixedly installed on the inner side of the front of the cabinet 1 is provided in front of the housing 5. Since 304 stainless steel is a common material for the outer shell of the power system cabinet 1, it is usually not necessary to install a reflective material separately. If it is not made of 304 material, a thin stainless steel plate can be installed separately as a reflective plate (the reflective plate can also use other materials with weaker infrared light absorption ability and stronger reflection ability, such as aluminum foil or polytetrafluoroethylene). The actual temperature of the object to be measured can be directly obtained by the probe, and the obtained temperature is then restored by the empirical quadratic curve. The error between the restored temperature and the actual temperature is within the range of ±2°C.

[0074] Embodiment 5: As an optimization of the above embodiment, as shown in the attached Figure 1 , 2 As shown, the image information of the inner side of the cabinet 1 is collected, and the image information is combined with the temperature data to generate the final picture including:

[0075] Convert the collected original image into a bitmap;

[0076] Add text information to the bitmap;

[0077] Convert the bitmap with text information into a process picture;

[0078] Convert temperature data into thumbnails;

[0079] Converting temperature data to thumbnail images involves:

[0080] Step 1: Convert the temperature value into a color map. According to the temperature value of the current point and the upper and lower limits of the system temperature, use the following formula to obtain the T value:

[0081]

[0082] That is, assuming the upper and lower limits of the temperature range, the actual temperature data is converted into a value T between 0 and 255, where T is an integer between 0 and 255, and T is substituted into the following pseudo-color coding calculation function to generate pseudo-color;

[0083] When the T value is less than 64 and greater than or equal to 0, the T value is converted into a set of RGB format color values ​​using the following formula:

[0084]

[0085] When the T value is less than 127 and greater than or equal to 64, the T value is converted into a set of RGB format color values ​​using the following formula:

[0086]

[0087] When the T value is less than 191 and greater than or equal to 127, the T value is converted into a set of RGB format color values ​​using the following formula:

[0088]

[0089] When the T value is less than or equal to 255 and greater than or equal to 191, the T value is converted into a set of RGB format color values ​​using the following formula:

[0090]

[0091] Step 2: Convert the color map to a thumbnail. Convert the 32x24 point temperature data to color points, then expand it to a 160x120 dot matrix and generate a thumbnail.

[0092] The final image is generated by adding the thumbnail to the additional information of the process image.

[0093] The temperature sensor is based on visible light photos, and then attaches words such as "maximum temperature xx degrees, minimum temperature xx degrees, maximum temperature difference xx degrees" to the photos, and embeds the temperature data in the file in the form of picture attached data. When transmitting, only one JPG file is needed to transmit all data to the background display, which reduces the data exchange process, and both the files and temperature data have high readability.

[0094] Then, all the 32x24 point temperature data are converted into color points, and the converted image is expanded to 160x120 dot matrix, that is, one temperature data occupies the position of 5 color points. Using EXIF ​​information as the basis for JPG attachment, occupying the APP1 identification position, in the EXIF ​​information, using IFD0 as the location for thumbnail storage data, using RGB format as the thumbnail format, can prevent the temperature data distortion caused by JPG compression from causing greater errors, so that the thumbnail can be added to the additional information of the process image to generate the final image.

[0095] The above technical features respectively constitute various embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A cabinet temperature measuring device, comprising a cabinet, characterized in that It also includes a guide rail, a drive motor, a temperature acquisition module, a driver, a display, a control module and a power module. A vertically arranged guide rail is fixedly installed on the inner side of the front of the cabinet, a slider is slidably installed on the outer side of the guide rail, a drive motor that can move the slider up and down is fixedly installed on the inner side of the upper part of the cabinet, and a temperature acquisition module is fixedly installed on the side of the slider. The temperature acquisition module includes a temperature sensor, a camera and a shell fixedly installed on the side of the slider. The side of the shell close to the cabinet surface is provided with a collection hole connected inside and outside, and the temperature sensor and the camera are fixedly installed at intervals in the shell corresponding to the position of the collection hole. The temperature sensor and the camera are both connected to the control module fixedly installed in the shell, the control module is respectively connected to the display and the driver, and the driver is respectively connected to the drive motor and the power module.

2. The cabinet temperature measuring device according to claim 1, characterized in that The temperature sensor is a 32*24 dot matrix infrared temperature sensor.

3. The temperature measuring method of the cabinet temperature measuring device according to claim 1 or 2, characterized in that The steps include: Move the slider to the position to be tested and stop; Collect temperature data inside the cabinet; Collect image information from the inside of the cabinet and combine the image information with temperature data to generate the final image; Send the final image to the display.

4. The temperature measurement method according to claim 3, characterized in that The temperature data collected inside the cabinet include: When the probe of the temperature sensor is opposite to the front side of the cabinet, the temperature data collected by the temperature sensor is the temperature data of the cabinet; When the probe of the temperature sensor is in the same direction as the front side of the cabinet, a reflection plate is set on the front side of the collection cabinet, and the temperature data collected by the temperature sensor through the reflection plate is the temperature data of the cabinet.

5. The temperature measurement method according to claim 3 or 4, characterized in that Collect image information from the inside of the cabinet and combine the image information with temperature data to generate the final image including: Convert the collected original image into a bitmap; Add text information to the bitmap; Convert the bitmap with text information into a process picture; Convert temperature data into thumbnails; The final image is generated by adding the thumbnail to the additional information of the process image.

6. The cabinet temperature measuring device according to claim 5, characterized in that Converting temperature data to thumbnail images involves: Step 1: Convert the temperature value into a color map. According to the temperature value of the current point and the upper and lower limits of the system temperature, use the following formula to obtain the T value: When the T value is less than 64, the T value is converted into a set of RGB format color values ​​using the following formula: When the T value is less than 127 and greater than or equal to 64, the T value is converted into a set of RGB format color values ​​using the following formula: When the T value is less than 191 and greater than or equal to 127, the T value is converted into a set of RGB format color values ​​using the following formula: When the T value is less than or equal to 255 and greater than or equal to 191, the T value is converted into a set of RGB format color values ​​using the following formula: Step 2: Convert the color map to a thumbnail. Convert the 32x24 point temperature data to color points, then expand it to a 160x120 dot matrix and generate a thumbnail.

Images