A monitoring device and system for monitoring the seal status of a containment memory

Abstract

The application provides a monitoring device for monitoring the sealing state of a protective memory, comprising a protective memory and a tachograph, the protective memory being installed inside the tachograph, the protective memory comprising an inner container water box, a temperature detection module, a pressure sensor, a microprocessor and a connecting circuit; the inner container water box is internally provided with a phase change material; the temperature detection module is arranged at the central position or the position close to the central position of the inner container water box and is used for monitoring the temperature change in the inner container water box in real time; the pressure sensor is arranged inside the inner container water box and is used for monitoring the pressure change in the inner container water box in real time; the microprocessor is connected with the temperature detection module and the pressure sensor, is used for receiving and processing the temperature and pressure data, and judges the sealing state of the inner container water box according to the preset standard temperature-pressure relationship curve.

Description

Technical Field

[0001] This application relates to the field of protective memory for automotive driving recorders, and in particular to a monitoring device and system for monitoring the sealing status of protective memory. Background Technology

[0002] Most protective storage devices used in automotive dashcams employ a built-in water (liquid) reservoir to achieve high-temperature protection. During use, these products must maintain a consistent level of phase change material (pure water or a hydrogel composed of water and absorbent resin) within the reservoir. This means the reservoir must remain effectively sealed during operation; otherwise, the phase change material will evaporate and leak due to seal failure. Therefore, online monitoring of the reservoir's seal is crucial for maintaining the product's resistance to high-temperature damage.

[0003] The sealing condition of the inner tank water box can be detected by real-time monitoring of the temperature changes inside and outside the protective storage tank and their correlation. However, this method has certain limitations. When the inner tank water box is slightly damaged but there is still a large amount of phase change material inside the box, it is not possible to immediately determine whether the inner tank water box is damaged by monitoring the trend correlation of the temperature changes inside and outside. This method is only effective when the phase change material leaks to a certain amount.

[0004] This invention relates to a system and method for real-time monitoring of the sealing condition of the inner tank water container by detecting changes in pressure and temperature inside the inner tank water container using pressure and temperature sensors built into the inner tank, calculating the pressure change trend with temperature changes and comparing it with standard data. Utility Model Content

[0005] To achieve the above objectives, this application provides a monitoring device for monitoring the sealing status of a protective storage device, including a protective storage device and a driving recorder. The protective storage device is installed inside the driving recorder and includes an inner water tank, a temperature detection module, a pressure sensor, a microprocessor, and a connection circuit.

[0006] The inner water tank contains a phase change material.

[0007] The temperature detection module is located at or near the center of the inner tank water box, and is used to monitor the temperature changes inside the inner tank water box in real time.

[0008] A pressure sensor is installed inside the inner tank water box to monitor pressure changes inside the inner tank water box in real time.

[0009] The microprocessor, connected to the temperature detection module and pressure sensor, is used to receive and process temperature and pressure data, and to determine the sealing status of the inner tank water box according to the preset standard temperature-pressure relationship curve.

[0010] Optionally, the device further includes a storage chip connected to a microprocessor for storing a preset standard temperature-pressure relationship curve and real-time recorded temperature and pressure data.

[0011] Optionally, the pressure sensor is placed in the phase change material either by direct placement or by placing it after waterproofing treatment.

[0012] Optionally, the microprocessor is connected to the driving recorder via a communication circuit, and uploads the real-time monitored temperature and pressure data and the sealing status judgment results to the platform through the driving recorder.

[0013] Optionally, the preset standard temperature-pressure relationship curve is obtained by averaging the values ​​obtained from testing different batches of standard sample products and adjusting them with a correction factor.

[0014] Optionally, it also includes an adaptive learning module, which is connected to the microprocessor and is used to optimize the standard temperature-pressure relationship curve based on actual monitoring data to adapt to the usage requirements under different environments.

[0015] On the other hand, this application also provides a system for monitoring the sealing status of a protective memory, the system comprising the apparatus described in any of the foregoing embodiments; and,

[0016] The alarm module, connected to the microprocessor, issues an alarm when an abnormal sealing condition is detected.

[0017] The communication module, connected to the microprocessor, is used to send the temperature, pressure data, and sealing status information of the inner tank water box to the management platform.

[0018] On the other hand, this application also provides a method for monitoring the sealing status of a protective memory, comprising the following steps:

[0019] a) Obtain the correlation data and variation function of the pressure inside the water tank of the standard sample protective storage tank with temperature;

[0020] b) For each batch of mass-produced products, the first piece, the last piece, and a portion of the products in production are sampled to detect the correlation data of pressure change with temperature in the protective inner tank water box, and compare it with standard data to obtain the correction coefficient and standard dataset of the batch of products, and obtain the standard dataset, correction coefficient, and change function of the batch of products.

[0021] c) Save the above data to the microprocessor or memory chip of each product;

[0022] d) During actual use of the product, obtain data on the pressure change of the water tank inside the protective memory under test as a function of temperature;

[0023] e) Compare the actual data information obtained in step d with the standard dataset of this batch in step b to determine the sealing status of the water box inside the protective storage tank;

[0024] f) When an abnormal sealing condition is detected, an alarm is triggered, and the damage data and curves are sent to the management platform via the driving recorder for further verification and confirmation, and a repair or replacement instruction is issued.

[0025] Optionally, the phase change material filled in the water tank of the standard sample protection storage tank is a single-component liquid to ensure the consistency and accuracy of the test results.

[0026] Optionally, after batch testing of each batch of products, the test results are averaged to obtain the standard temperature-pressure relationship curve of the standardized product, and stored in the microprocessor or flash memory chip of the protection memory.

[0027] Optionally, in step d, after the protection memory is running, it records the measured temperature and pressure values ​​one by one to form a complete set of pressure-temperature relationship values ​​and curves, which are used to correct the detection differences of the undamaged inner tank water box with abnormal data.

[0028] Optionally, the inner water tank is provided with a heat insulation layer, and the heat insulation layer is provided with a protective shell. Through holes are reserved on the heat insulation layer and the protective shell for FPC cables to pass through.

[0029] Optionally, the correlation data and its variation function of the pressure inside the water tank of the protective storage tank with temperature are as follows:

[0030] in:

[0031] P t It is the pressure value of the inner tank water box at the temperature to be measured;

[0032] P0 is the initial temperature and pressure value (20℃);

[0033] t is the temperature value to be measured (degrees Celsius);

[0034] β is the coefficient that causes the gas volume to change with temperature;

[0035] λ is the coefficient that causes the change in gas mass with temperature;

[0036] ΔT is the change in temperature to be measured relative to the initial temperature.

[0037] The technical solutions provided in this application embodiment may include the following beneficial effects:

[0038] This invention, by real-time monitoring of temperature and pressure changes within the water tank of the protective storage device and comparing them with a standard dataset, can more accurately determine the sealing status and promptly detect potential seal failures. This method not only improves the accuracy of sealing status monitoring but also provides early warnings before the protective storage device's resistance to high-temperature damage has significantly decreased, ensuring the reliability and safety of the equipment. It possesses significant application value and market potential. Attached Figure Description

[0039] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0040] Figure 1 This is a structural block diagram of a monitoring device provided in an exemplary embodiment of this application;

[0041] Figure 2 This is a curve showing the temperature and pressure changes inside the water tank provided in an exemplary embodiment of this application;

[0042] Figure 3 This is a flowchart of a method for monitoring the sealing status of a protective memory provided in an exemplary embodiment of this application. Detailed Implementation

[0043] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0044] like Figure 1 As shown, this utility model provides a monitoring device for monitoring the sealing status of a protective storage device, including a protective storage device and a driving recorder. The protective storage device is installed inside the driving recorder and includes an inner water tank, a temperature detection module, a pressure sensor, a microprocessor, and a connection circuit.

[0045] The inner water tank is the core component of the protective storage device, containing a phase change material. This phase change material is a single-component liquid to ensure the consistency and accuracy of test results. For example, the phase change material can be pure water or a hydrogel. For ease of explanation, pure water is used as the phase change material in this application. Other phase change materials operate on the same principle. For instance, in this embodiment, the phase change material in the standard sample is pure water, while the phase change material in the mass-produced product is a hydrogel (water + water-absorbing resin).

[0046] The structural design provided in this application can effectively withstand high temperatures and protect the data security of the memory chip. The inner water tank design in this application takes into account sealing to ensure that the phase change material will not affect its protective performance due to leakage. The outer surface of the inner water tank is wrapped with a heat insulation layer, further enhancing the overall protective effect.

[0047] For example, the inner water tank can be made of high-density polyethylene (HDPE), which not only has good heat resistance and chemical stability, but also effectively prevents the external environment from affecting the internal materials.

[0048] For example, the temperature detection module is located at or near the center of the inner tank water box to monitor the temperature changes inside the inner tank water box in real time.

[0049] In one specific embodiment, the temperature detection module can be integrated onto a protective memory circuit board. This circuit board integrates a microcontroller, a temperature sensor, and a memory chip, and connects to an external system via an FPC cable. This design not only simplifies wiring but also improves system reliability.

[0050] A pressure sensor is installed inside the inner tank of water to monitor pressure changes within the tank in real time. This data, along with data from the temperature sensor, is transmitted to a microprocessor for processing.

[0051] The microprocessor connects to the temperature and pressure sensors to receive and process data from them. For example, the pressure sensor is embedded in the phase change material either directly or in a waterproof manner.

[0052] In one possible implementation, the monitoring device provided in this embodiment further includes a memory chip connected to a microprocessor for storing a preset standard temperature-pressure relationship curve and real-time recorded temperature and pressure data. For example, the memory chip may be integrated with the microprocessor or utilize an existing memory chip.

[0053] The memory chip or microprocessor stores standard temperature-pressure relationship curves. These curves are obtained by averaging the values ​​obtained from testing different batches of standard sample products and adjusting them with correction factors. The microprocessor uses these standard datasets to determine the sealing condition of the inner tank water box.

[0054] In one possible implementation, the microprocessor connects to the driving recorder via a communication circuit, uploading real-time monitored temperature and pressure data, as well as sealing status assessment results, to a management platform. This management platform can be a cloud server data center or monitoring center, or an in-vehicle monitoring platform, used for data processing and analysis.

[0055] In actual use, the interior of the inner water tank is not entirely filled with a mixture of water and gel; some air is also present. The pressure within the inner water tank comes from three factors: first, the pressure generated by changes in the volume of liquid water with temperature; second, the change in saturated vapor pressure in the waterless space within the inner tank due to temperature changes (the pressure change of air due to temperature changes is negligible due to the small volume of the cavity); and third, the pressure change caused by the volume change of water when it freezes. Therefore, we can conclude that the pressure change within the sealed inner water tank is primarily due to temperature changes. Figure 2 As shown, the curves illustrating the temperature and pressure changes inside the inner tank water box are presented.

[0056] When the temperature inside the water tank is above 0℃, within the range of 0℃ to 5℃, the water undergoes a volume decrease with temperature. At this point, the saturated vapor pressure is relatively low, and the pressure inside the water tank mainly comes from the change in liquid volume. When the temperature inside the water tank exceeds 5℃, the liquid expands with increasing temperature, and simultaneously, the saturated vapor pressure inside the water tank also increases significantly with rising temperature. Figure 2 From the curve, we can see that the pressure and temperature rise almost linearly and synchronously. Therefore, we can derive the formula for the relationship between temperature and pressure inside the inner tank:

[0057]

[0058] In the formula: P t The pressure value of the inner water tank at the temperature to be measured; P0: initial temperature and pressure value (20℃); t: temperature to be measured (degrees Celsius); β: coefficient of gas volume change caused by temperature change; λ: coefficient of gas mass change caused by temperature change; ΔT: change of the temperature to be measured relative to the initial temperature.

[0059] By testing standardized products, we can accurately estimate the coefficients in the formula. When the relationship between temperature and pressure inside the inner tank does not conform to the formula, and this relationship shows a trend indicating potential damage to the inner tank (e.g., pressure lower than the corresponding value after temperature change), the inner tank can be considered damaged. If the damage is significant, the pressure change will be minimal or nonexistent when the temperature of the inner tank changes. In this case, due to the damaged seal, the pressure is equal to or nearly equal to the atmospheric pressure outside the inner tank. With minor damage, the pressure will change with temperature, but the absolute value and rate of change will decrease.

[0060] Furthermore, we can conduct batch tests on well-sealed standard products, average the test results, and derive a standard temperature-pressure relationship curve for the standardized products. This curve data is then stored in the MCU or memory chip of the protective storage device. During daily operation, the internal pressure and temperature values ​​of the protective storage device are continuously monitored and compared with the standard curve data. If the temperature and pressure values ​​and their rate of change are less than the standard curve, and the detected results show a decreasing trend, then the inner tank water box seal can be considered damaged. Compared with other methods, the pressure leak detection method can detect damage at the first moment. The communication module can send the damage data and curve to the management platform via the driving recorder, where the platform further verifies the data. Once damage is confirmed, a repair and replacement instruction can be issued. This allows for timely replacement of the protective storage device before its thermal protection performance has significantly deteriorated.

[0061] Due to the varying states of the water and absorbent gel within the inner tank of the protective storage device, air from the sealed inner tank may be mixed into the hydrogel as tiny air bubbles. The distribution of these air bubbles in the mixed gel may cause discrepancies in pressure sensor readings at specific locations. This could also result in measured pressure-temperature relationships and curves that differ from standard values ​​and curves. Furthermore, after each protective storage device is installed and put into operation, the measured temperature and pressure values ​​can be recorded sequentially until a more complete set of pressure-temperature relationships and curves is formed. This set can then be used to replace the standard product's pressure-temperature relationship curve, correcting for individual data anomalies in the detection of undamaged inner tanks, thus creating a more targeted comparison benchmark.

[0062] Furthermore, this application also provides a system for monitoring the sealing status of a protective storage device, including the monitoring device for monitoring the sealing status of the protective storage device described in the foregoing embodiments, and an alarm module connected to a microprocessor, which triggers an alarm when an abnormal sealing status is detected. For example, the alarm method can be an audible and visual alarm, a vibration alarm, or electronic alarm information can be sent via a communication module so that alarm notifications can be received promptly both inside the vehicle and remotely.

[0063] The communication module, connected to the microprocessor, transmits temperature, pressure, and sealing status information of the inner tank water box to an external management platform. It supports wireless communication protocols such as Bluetooth, Wi-Fi, or cellular networks, allowing users to check the device status anytime, anywhere. This not only improves the user experience but also facilitates subsequent maintenance.

[0064] In one embodiment, the device further includes an adaptive learning module, which works in conjunction with the microprocessor to optimize the standard temperature-pressure relationship curve based on actual monitoring data to adapt to usage requirements in different environments. This means the system can self-adjust according to actual conditions, improving monitoring accuracy.

[0065] This application also provides a method for monitoring the sealing status of a protective memory; please refer to [link to relevant documentation]. Figure 3 This includes the following steps:

[0066] a) Obtain the correlation data and variation function of the pressure inside the water tank of the standard sample protective storage tank as a function of temperature.

[0067] First, we need to obtain the correlation data and its function of the pressure inside the water tank of the standard sample protective storage tank as a function of temperature. The correlation data and its function of the pressure inside the water tank of the protective storage tank as a function of temperature are as follows: Where: Pt is the pressure value of the inner water tank at the temperature to be measured; P0 is the initial temperature and pressure value (20℃); t is the temperature to be measured (degrees Celsius); β is the coefficient of gas volume change caused by temperature change; λ is the coefficient of gas mass change caused by temperature change; ΔT is the change in temperature of the test relative to the initial temperature.

[0068] For example, high-precision thermometers and digital pressure gauges can be used to measure the pressure and temperature data of standard samples. These devices offer high accuracy and stability, providing reliable data support.

[0069] b) For each batch of mass-produced products, the first piece, the last piece, and a portion of the products in production are sampled. The correlation data of the pressure change with temperature in the protective inner tank water box is detected and compared with the standard data to obtain the correction coefficient and standard dataset of the batch of products. The standard dataset, correction coefficient, and change function of the batch of products are obtained.

[0070] For each batch of mass-produced products, the first, last, and a portion of products in production are sampled to detect the correlation data of pressure changes with temperature in the protective inner tank water box. This data is then compared with standard data to obtain the correction coefficient and standard dataset for that batch. After batch testing, the test results are averaged to obtain the standard temperature-pressure relationship curve for the standardized product, which is then stored in the microprocessor or flash memory chip of the protective memory.

[0071] c) Save the above data to the microprocessor or memory chip of each product.

[0072] d) During actual use of the product, obtain data on the pressure change of the water tank inside the protective memory under test as a function of temperature.

[0073] During actual product use, the pressure and temperature changes in the water tank inside the protective storage compartment are continuously monitored. Each measurement is recorded, forming a complete set of pressure-temperature relationship values ​​and curves. This data helps correct for potential errors and establishes a more accurate comparison benchmark. For example, data acquisition and analysis can be performed using Matlab software.

[0074] e) Compare the actual data information obtained in step d with the standard dataset of this batch in step b to determine the sealing status of the water tank inside the protective storage tank.

[0075] The actual usage data is compared with a standard dataset to determine the sealing status of the water tank inside the protective storage device. If an abnormal sealing condition is detected, the microprocessor will trigger the alarm module to issue an alarm notification. Simultaneously, the damage data and curves are sent to the management platform via the communication module for further verification and confirmation, and a repair or replacement instruction will be issued if necessary.

[0076] f) When an abnormal sealing condition is detected, an alarm is triggered, and the damage data and curves are sent to the management platform via the driving recorder for further verification and confirmation, and a repair or replacement instruction is issued.

[0077] The apparatus and method provided in the above embodiments are described below with reference to a practical application scenario.

[0078] Standard samples were tested to generate standard temperature-pressure relationship curves.

[0079] Sampling tests are conducted on mass-produced products to obtain standard datasets and correction coefficients for each batch, and a change function corresponding to that batch of products is generated.

[0080] Before the product leaves the factory, the data and algorithms generated by the above steps are stored in the microprocessor or flash memory chip and recorded in the management platform.

[0081] After the protective storage device is installed and put into operation, the temperature and pressure changes inside the inner tank water box are monitored in real time.

[0082] Record the measured temperature and pressure values ​​one by one to form a complete pressure-temperature relationship value and curve.

[0083] Regularly compare the data with a standard dataset to determine the sealing status of the inner tank water box.

[0084] When an abnormal sealing condition is detected, the microprocessor triggers the alarm module to issue an alarm notification. Simultaneously, the damage data and curves are sent to the management platform via the communication module for further verification and confirmation, and a repair or replacement instruction is issued if necessary.

[0085] This invention significantly improves the accuracy and reliability of monitoring the sealing status of protective storage devices by introducing a dual monitoring mechanism of temperature and pressure. Firstly, utilizing built-in pressure and temperature sensors, the system can acquire real-time data on pressure and temperature changes inside the inner tank. Compared to traditional monitoring methods that rely solely on temperature changes, this dual monitoring approach can detect anomalies even when the seal is slightly damaged, avoiding safety hazards caused by delayed maintenance. Furthermore, by testing standard samples before shipment to generate standard temperature-pressure relationship curves and variation functions, and adjusting correction coefficients for different batches of products, the standard dataset for each batch is ensured to better reflect actual conditions, further enhancing monitoring accuracy.

[0086] Secondly, this invention features real-time monitoring and early warning capabilities, significantly enhancing the reliability and safety of the equipment. The system can collect and process temperature and pressure data from the inner tank water box in real time, promptly identifying potential problems and triggering alarms. Simultaneously, the communication module supports transmitting the status information of the inner tank water box to an external management platform, enabling remote monitoring and management. System administrators can view the equipment status at any time, obtain the latest alarm information, and make corresponding maintenance decisions. This not only simplifies the troubleshooting process but also reduces maintenance time and costs.

[0087] Finally, this invention boasts broad applicability and environmental adaptability, making it suitable for a variety of application scenarios. It can not only be applied to the protective storage device in automotive driving recorders but also extended to other fields requiring high-temperature protection and sealed monitoring, such as industrial control systems and aerospace equipment. Its adaptive learning module can automatically adjust monitoring parameters according to different working environments, ensuring good performance even under various complex conditions.

[0088] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered illustrative only, and the true scope and spirit of this application are indicated by the following claims.

[0089] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A monitoring device for monitoring the sealing status of a protective memory, characterized in that, It includes a protective memory and a driving recorder. The protective memory is installed inside the driving recorder and includes an inner water tank, a temperature detection module, a pressure sensor, a microprocessor, and connecting circuitry. The inner water tank contains a phase change material. The temperature detection module is located at or near the center of the inner tank water box, and is used to monitor the temperature changes inside the inner tank water box in real time. A pressure sensor is installed inside the inner tank water box to monitor pressure changes inside the inner tank water box in real time. The microprocessor, connected to the temperature detection module and pressure sensor, is used to receive and process temperature and pressure data, and to determine the sealing status of the inner tank water box according to the preset standard temperature-pressure relationship curve.

2. The apparatus as claimed in claim 1, characterized in that, The device also includes a storage chip connected to a microprocessor for storing preset standard temperature-pressure relationship curves and real-time recorded temperature and pressure data.

3. The apparatus as described in claim 1, characterized in that, The pressure sensor is placed in the phase change material either directly or after waterproofing.

4. The apparatus as claimed in claim 1, characterized in that, The microprocessor is connected to the driving recorder via a communication circuit, and uploads the real-time monitored temperature and pressure data and the sealing status judgment results to the management platform through the driving recorder.

5. The apparatus as described in claim 2, characterized in that, The preset standard temperature-pressure relationship curve is obtained by averaging the values ​​obtained from testing different batches of standard sample products and adjusting them with a correction factor.

6. The apparatus as claimed in claim 1, characterized in that, It also includes an adaptive learning module, which is connected to the microprocessor and is used to optimize the standard temperature-pressure relationship curve based on actual monitoring data to adapt to the usage requirements in different environments.

7. A system for monitoring the sealing status of a protective memory, characterized in that, The system includes the apparatus according to any one of claims 1 to 6; and, The alarm module, connected to the microprocessor, issues an alarm when an abnormal sealing condition is detected. The communication module, connected to the microprocessor, is used to send the temperature, pressure data, and sealing status information of the inner tank water box to the management platform.

Images