A method and system for zone anomaly identification and selective safety control with a sleeve cover

Abstract

The present application relates to the technical field of flexible electric heating product control, and particularly relates to a method and system for abnormality identification and selective safety control of a balaclava. The method collects temperature data of a torso area, a leg area, a foot area and a sleeve area, calculates a temperature rise rate of a target area and a temperature difference between the target area and adjacent areas, and collects a corresponding human contact state signal. When the temperature rise rate exceeds a first threshold value, the temperature difference exceeds a second threshold value, and the human contact state is non-contact, it is determined that the target area is in an abnormal folding or abnormal stacking state, and only the target area is subjected to reduced power supply or power-off processing, while at least one non-abnormal area continues to work. The present application can effectively distinguish between normal human contact heating and local abnormal heat accumulation, and improve safety, comfort and applicability.

Description

Technical Field

[0001] This invention relates to the field of control technology for flexible electric heating appliances, and in particular to a method and system for zoned anomaly identification and selective safety control of blankets with sleeves. Background Technology

[0002] As home heating products evolve towards greater flexibility, comfort, and intelligence, blankets that combine warmth and ease of wear are gaining market attention. Compared to traditional flat electric blankets, sleeved blankets cover the torso and lower limbs while allowing the user's arms to extend and maintain a degree of freedom of movement, making them more suitable for sofa relaxation, office reading, lunch breaks, and non-sleeving bedroom scenarios. Furthermore, to address the limitations of traditional blankets in terms of limited warmth retention, short temperature maintenance time, and poor environmental adaptability, some products are incorporating heating elements or heated linings for active heating. However, sleeved blankets differ significantly from conventional flat electric blankets in their usage, heat distribution, partial coverage, and folding / stacking methods, making it difficult for existing electric blanket control technology to directly meet the dual requirements of comfort and safety in this type of product.

[0003] Existing technologies already include solutions for zoned control and status sensing of electric blankets. For example, existing technical document CN216346U discloses a zoned control type electric blanket, which sets multiple rectangular heating zones on the blanket body, and installs temperature sensors, heating wires, and pressure sensors in corresponding zones. Through a data transmission module and a cloud server, the pressure and temperature data of each zone are recorded, stored, and updated, thereby enabling management and analysis of the user's sleep patterns and the electric blanket's usage. This technical solution demonstrates that dividing the electric blanket into multiple zones and collecting temperature and pressure information separately has become a technological approach to improve user experience and monitoring capabilities.

[0004] In addition, existing technical document CN209824057U discloses a zoned intelligent control energy-saving electric blanket. This scheme divides the electric blanket into multiple zones based on the normal sleeping posture of the human body, with each zone operating independently. When a human body is detected, the zone with the human body sensor continuously heats, while the zone without the human body sensor receives indirect heating or preheating. When no human body is detected, the power is automatically cut off. This technology demonstrates that utilizing human body sensing information in zoned heating control can improve comfort, reduce energy consumption, and minimize safety hazards to a certain extent.

[0005] As can be seen from the two existing technologies mentioned above, current electric blanket control technology already possesses the following basic principles: First, by dividing the blanket body into multiple zones, different zones are independently heated or monitored; second, by collecting usage status information through temperature sensors, pressure sensors, or human body sensors, and then adjusting the heating to a certain extent. This type of technology can meet the needs of traditional electric blankets laid flat on the bed to a certain extent. However, when the product form changes to a sleeved blanket with an internal heated lining, its actual usage conditions become more complex, and the shortcomings of existing technologies become more apparent.

[0006] Firstly, most existing zoned electric blankets are designed for use on a flat bed. Their heating zones are typically divided into planar sections based on the bed surface or the general area where the body lies, primarily addressing the issue of regional heating during sleep. However, sleeved blankets are flexible coverings that can be draped, rolled up, and partially folded. Their heated areas include not only the torso and legs but also the feet, sleeves, and overlapping areas on the chest. When reading, working, watching movies, or resting, users often find themselves with partially empty sleeves, deeply covered feet, multiple overlapping areas on the chest, hems tucked into sofa gaps, or partially folded back. Traditional electric blankets, with their planar area-based control logic, struggle to accurately adapt to this dynamic covering structure and cannot provide precise temperature control based on the actual coverage of different body parts.

[0007] Secondly, while existing technologies have incorporated pressure sensors or human body sensing signals, their primary applications are mainly focused on detecting whether someone is present or absent, or analyzing sleep patterns. They haven't adequately addressed the distinction between normal heat generation from human contact and abnormal heat accumulation under non-human contact conditions. For sleeved blankets, localized folding, stacking, rolling, and compression are more likely to occur, especially in the sleeves, foot pockets, hem edges, and near the controller connections. If heating circuitry experiences localized stacking under non-human contact conditions, it can cause a rapid temperature rise, forming abnormal hotspots. Relying solely on a single temperature threshold for overall power-off protection can lead to two problems: firstly, when normal human coverage causes localized temperature increases, the system may misjudge this as a dangerous situation and frequently shut down, affecting the warmth experience; secondly, when localized stacking occurs but the overall average temperature is not yet abnormal, the system may fail to identify the risk in time, posing a safety hazard. In other words, existing technologies are still insufficient in identifying the mechanisms of localized hotspot formation, particularly lacking abnormal identification and control logic applicable to sleeved, foldable, and partially covered blankets.

[0008] Secondly, most existing human body sensing-based zoned heating solutions adopt a basic approach of continuously heating occupied areas and cooling or shutting off unoccupied areas. The control objectives are biased towards energy saving and basic comfort, without considering the differences in heat requirements of different body parts, variations in the degree of localized coverage, and the unique wearing posture of sleeved blankets to establish more refined zoned control strategies. In reality, the warmth requirements of different areas of a sleeved blanket vary during use. For example, the foot area is usually in a closed, covered state, making heat less likely to dissipate; the sleeve area may frequently switch between contact and non-contact as the arm extends, retracts, or folds; the torso area has the greatest impact on overall thermal comfort, while the leg area is significantly affected by changes in position. If the relatively crude zoned control method of traditional electric blankets is still used, problems often arise such as some areas overheating, some areas underheating, or non-contact areas heating up unnecessarily, resulting in wasted energy.

[0009] Furthermore, the heated inner lining in sleeved blankets is often designed to be detachable for ease of cleaning, maintenance, replacement, and reuse across multiple specifications. While the heated inner lining improves the product's usability and modularity, it also introduces new control and safety issues. For example, improper installation, poor connection, mismatch between the inner lining model and control parameters, or loose connections can all lead to abnormal heating in a particular zone, distorted temperature sampling, or failure of safety protection. Existing technical literature on zoned control of electric blankets primarily focuses on the fixed heating structure inside the blanket body, with insufficient attention paid to the identification, matching, and linkage control of the heated inner lining, making it difficult to meet the usage requirements of modular sleeved blanket products.

[0010] Overall, while existing technologies disclose techniques such as zoned heating, temperature detection, pressure / human body sensing, and energy-saving control, these technologies are mostly focused on traditional flat electric blankets and lack a comprehensive and targeted control solution for the new product form of sleeved blankets with heated inner linings. In particular, there are significant shortcomings in the following aspects: First, there is a lack of segmented zone control mechanisms for special usage forms such as sleeved blankets, foot coverings, and chest overlaps; second, there is a lack of abnormal folding / stacking identification mechanisms that can combine localized temperature rise anomalies, temperature difference characteristics between adjacent areas, and human contact status; third, there is a lack of selective safety control mechanisms that, in the event of a localized anomaly, only reduce or cut off power to the abnormal area while maintaining warmth in non-abnormal areas; and fourth, there is a lack of identification and matching control mechanisms for heated inner linings.

[0011] Therefore, in view of the above-mentioned problems in the existing technology, there is an urgent need to propose a control method suitable for sleeved blankets, which can achieve more accurate zoned temperature control and more reliable safety protection under different human body covering states, different local wrapping forms and complex working conditions that may involve local folding and stacking, thereby taking into account user comfort, energy efficiency and product safety. Summary of the Invention

[0012] The technical objective of this invention is to address the problems existing in the use of sleeved blankets or electric blankets, such as insufficient precision in zoned temperature control, difficulty in effectively distinguishing between normal human contact heating and abnormal heating due to local folding and stacking, easy power outage when local abnormalities occur, affecting the warmth experience, and lack of effective identification and linkage control of the heating lining. This invention proposes a zoned abnormality identification and selective safety control method for sleeved blankets to achieve more precise control of different heating zones and improve the safety and applicability of the product while ensuring user comfort.

[0013] Firstly, in order to achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0014] A method for zoned anomaly identification and selective safety control of a sleeved blanket, wherein the sleeved blanket includes an outer blanket body, a heated inner lining, a controller, and multiple heated zones respectively located in the torso area, leg area, foot area, and sleeve area. Each heated zone is equipped with a heating circuit and a temperature detection unit, and the method includes the following steps:

[0015] S1. The controller periodically collects real-time temperature data of each heating zone and calculates the temperature rise rate of the heating zone based on the temperature change of the same heating zone in two adjacent sampling periods.

[0016] S2. The controller calculates the temperature difference between the target heating zone and at least one of its adjacent heating zones based on the real-time temperature data of each heating zone.

[0017] S3. The controller collects a human contact status signal corresponding to the target heating zone. The human contact status signal is used to characterize whether the target heating zone is in a human body-covered contact state.

[0018] S4. When the target heating zone simultaneously meets the following conditions, the controller determines that the target heating zone is in an abnormal stacking or abnormal folding state:

[0019] The rate of temperature rise exceeds the first threshold.

[0020] The temperature difference between the zones is greater than the second threshold.

[0021] The human contact state signal represents a non-human contact state;

[0022] S5. After determining that the target heating zone is in an abnormal stacking or abnormal folding state, the controller performs selective safety control only on the target heating zone, while keeping at least one non-abnormal heating zone working. The selective safety control includes: reducing the output power of the target heating zone to below a preset safe power, or cutting off the power supply to the target heating zone.

[0023] S6. The controller continuously monitors the temperature rise rate, temperature difference between zones, and human contact status signal of the target heating zone. When the abnormal judgment condition is not met for a preset recovery period, the selective safety control of the target heating zone is released, and the normal heating state of the target heating zone is restored.

[0024] Preferably, the human body contact status signal is acquired by at least one contact detection unit located in the cuff area, chest coverage area, and foot coverage area. The contact detection unit is any one or a combination of at least two of the following: a pressure sensor, a conductive contact, a piezoresistive sensor, and a capacitive contact sensor.

[0025] Preferably, the temperature difference between the zones is the difference between the temperature of the target heating zone and the lower of the temperatures of its left and right adjacent zones, or the difference between the temperature of the target heating zone and the average temperature of its multiple surrounding adjacent zones.

[0026] Preferably, when the controller executes step S4, it does not make an anomaly determination based on a single sampling period. Instead, it requires that the conditions of the temperature rise rate being greater than the first threshold, the partition temperature difference being greater than the second threshold, and the human contact state signal being characterized as a non-human contact state be met continuously for at least N sampling periods before determining that the target heating partition is in an abnormal stacking or abnormal folding state, where N is an integer greater than or equal to 2.

[0027] Preferably, the selective safety control includes two levels of protection:

[0028] When the target heating zone first meets the abnormality determination condition, the output power of the target heating zone is reduced to 20% to 60% of the corresponding normal output power;

[0029] If the target heating zone continues to meet the abnormal judgment condition for a preset duration after derating, the power supply to the target heating zone is cut off.

[0030] Preferably, when the target heating zone is determined to be in an abnormal stacking or abnormal folding state, the controller keeps at least one non-abnormal zone in the torso area and foot area running at the original set power or at the limit power to avoid the whole system shutting down and causing the user to lose overall temperature.

[0031] And / or, the heated inner lining of the sleeved blanket is connected to the controller via a connector. When the controller is powered on and initialized, it reads the signal of the identification element set in the connector to identify the model information or installation status information of the heated inner lining. When the identification result is abnormal, all or part of the heating zones are prohibited from entering the heating state.

[0032] Preferably, the identification element is any one of an coded resistor, an coded terminal, or a conductive combination contact; the controller calls the partition power limit parameter table and the partition safety threshold parameter table corresponding to the identified model based on the model information obtained.

[0033] Preferably, the controller also collects ambient temperature data and, when no abnormal stacking or folding is detected, corrects the target temperature or output power of each heating zone based on the ambient temperature data; the lower the ambient temperature, the greater the correction value for the target temperature or output power of each heating zone.

[0034] And / or, when no abnormal stacking or folding state is detected, the controller determines the target temperature for the torso area, leg area, foot area and sleeve area respectively based on the user-set comfort level and human body contact state signal; wherein, the foot area and sleeve area in the human body contact state are assigned a higher target temperature than in the non-contact state.

[0035] And / or, the controller sets an independent operating timer for each heating zone. When the cumulative operating time of any heating zone exceeds a first time threshold, the target temperature of that heating zone is lowered; when the cumulative operating time of any heating zone exceeds a second time threshold, that heating zone is shut down; wherein, the second time threshold is greater than the first time threshold.

[0036] And / or, the controller is configured with a sleep mode, in which the target temperature of at least some heating zones is adjusted in stages according to the sleep onset period, the stable sleep period, and the wake-up preheating period; wherein, the target temperature of the torso and foot areas is increased first during the sleep onset period, the overall target temperature is decreased during the stable sleep period, and the target temperature of the torso and sleeve areas is increased during the wake-up preheating period.

[0037] Secondly, the present invention also provides a zoned anomaly identification and selective safety control system for a sleeved blanket, comprising:

[0038] The sleeved blanket body includes an outer blanket body and a heated inner lining;

[0039] Multiple heating zones, the multiple heating zones including at least a torso zone, a leg zone, a foot zone, and a sleeve / arm zone;

[0040] Multiple temperature detection units are respectively set in each heating zone;

[0041] At least one human contact detection unit is provided for outputting a human contact status signal;

[0042] The partition drive circuit is used to drive each heating partition to work separately;

[0043] A controller connected to a plurality of temperature detection units, the human contact detection unit and the partition drive circuit, and configured to perform the control method according to any one of claims 1 to 7.

[0044] Thirdly, the present invention also provides a computer-readable storage medium having a computer program or instructions stored thereon, which, when executed by a processor, implement the steps of the method.

[0045] Fourthly, the present invention also provides a computer program product, including a computer program or instructions that, when executed by a processor, implement the steps of the method.

[0046] This invention collects temperature information from each heating zone of the sleeved blanket and combines this information with the temperature rise rate of the target zone, the temperature difference characteristics between the target zone and adjacent zones, and signals of human contact status. This allows for a joint determination of whether a local area is in an abnormally folded, stacked, or non-human-contact state of abnormal heat accumulation. This effectively distinguishes between temperature increases caused by normal human coverage and dangerous temperature increases caused by local structural abnormalities, significantly reducing the risks of false and missed protection associated with traditional single-temperature threshold control. When an anomaly is detected, this invention does not directly cut off the power to the entire unit, but only reduces or cuts off the power to the abnormal zone while allowing the non-abnormal zones to continue operating. This improves local overheat protection and avoids a sudden drop in overall warmth, enhancing the user experience during reading, resting, and working. Furthermore, by identifying and matching the heating lining, it reduces control inaccuracies and safety hazards caused by improper lining installation, model mismatch, or abnormal connections. This results in superior overall technical performance in terms of comfort, safety, energy consumption control, and product applicability. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the overall structure of a sleeved blanket according to the present invention.

[0048] Figure 2 This is a schematic diagram of the heating zones of a sleeved blanket according to the present invention.

[0049] Figure 3 This is a schematic diagram of the heating lining and wiring structure of a sleeved blanket according to the present invention.

[0050] Figure 4 This is a block diagram of the control system structure for a sleeved blanket according to the present invention.

[0051] Figure 5 This is a flowchart illustrating the overall process of a control method for a sleeved blanket according to the present invention.

[0052] Figure 6 This is a schematic diagram illustrating the principle of abnormal folding / stacking identification for a sleeved blanket according to the present invention.

[0053] Figure 7 This is a schematic diagram of the selective safety control timing of a sleeved blanket according to the present invention.

[0054] Figure 8 This is a schematic diagram illustrating the identification and parameter calling of a heated inner lining of a sleeved blanket according to the present invention. Detailed Implementation

[0055] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present invention.

[0056] I. Terminology Explanation

[0057] To make the technical solution of the present invention clearer, the terms involved in this article will be briefly explained first.

[0058] Sleeve blanket: refers to a flexible covering product with a main coverage area and sleeve structure. When the user drapes the blanket over the outside of the body, he can put his arms through the sleeves to take into account both warmth and ease of movement.

[0059] Heated inner lining: refers to a flexible heating component that is installed inside the outer blanket or can be detachably assembled onto the outer blanket, and has heating circuits, temperature detection units and connectors arranged on it.

[0060] Heating zones: These refer to the independent heating zones that are divided into by the blanket based on the parts of the body covered, differences in heat demand, and wiring structure. These include the torso zone, leg zone, foot zone, and sleeve / arm zone.

[0061] Target zone: refers to a specific heating zone that is currently selected by the controller for anomaly detection or control.

[0062] Human body contact status signal: refers to the sensor signal that reflects whether a certain heating zone is in a state of being covered, pressed, in contact with or separated from the human body.

[0063] Temperature rise rate: refers to the ratio of the temperature change of the same heating zone between adjacent sampling periods to the sampling time, used to characterize how fast the local temperature rises.

[0064] Zone temperature difference: refers to the temperature difference between the target zone and at least one adjacent zone, used to characterize the temperature gradient between local hotspots and the surrounding area.

[0065] Abnormal folding or stacking state: refers to the abnormal structural state of the heated lining or blanket, such as local folding, rolling, stacking, stuffing into gaps, or local agglomeration, which makes it difficult for local heat to dissipate under non-human contact conditions and forms abnormal heat accumulation.

[0066] Selective safety control refers to implementing derating, power cut-off, or power limiting control only on target zones that are determined to be abnormal, while allowing at least one non-abnormal zone to continue operating.

[0067] Recovery period: refers to the preset duration or preset number of sampling periods during which the abnormal judgment conditions are not met for a continuous period of time, used to determine whether the abnormal state has been resolved.

[0068] II. System Structure

[0069] Combination Figures 1 to 4 The sleeved blanket in this embodiment mainly includes an outer blanket body, a heated inner lining, a controller, a connector, a temperature detection unit, a human body contact detection unit, an ambient temperature detection unit, a zone drive circuit, a user interface, and an alarm module.

[0070] The outer blanket is a flexible fabric structure that, when unfolded, includes a chest coverage area, a torso coverage area, a leg coverage area, a foot coverage area, a left sleeve, and a right sleeve. The outer blanket can be a single-layer fabric structure or a double-layer sandwich structure to accommodate the heated inner lining. Preferably, the outer blanket is removable and washable, while the heated inner lining is detachably connected to the controller via a connector.

[0071] The heated inner lining is located inside the outer blanket or is detachably combined with the outer blanket. The heated inner lining has multiple zone heating circuits, forming zones for the torso, legs, feet, left sleeve, and right sleeve. Each zone can be powered independently, or its output power can be adjusted separately by a controller via zone drive circuits.

[0072] The temperature detection unit is preferably an NTC thermistor, digital temperature sensor, flexible thermocouple, or equivalent temperature detection element, and can be set at representative locations in each heating zone. For example, at least one temperature detection point can be set in the torso area, at least one temperature detection point can be set in the leg area, and two or more temperature detection points can be set in the foot area, which is prone to heat accumulation due to being covered. In the sleeve area, the detection points can be set near the cuff or in areas with dense heating wires. If higher recognition accuracy is required, multiple temperature detection points can be set in a zone, and the controller can select the maximum value, average value, or weighted value as the real-time temperature of that zone.

[0073] The human contact detection unit is used to determine whether a target area is covered by a human body. It can employ a pressure sensor, piezoresistive film, capacitive contact sensor, conductive contact pad, flexible contact pad, or a combination thereof. Preferably, human contact detection units are respectively installed in the chest coverage area, foot coverage area, left sleeve, and right sleeve. Thus, when the user inserts their arms into the sleeves, puts their feet into the foot bag, or presses a blanket over their chest, the controller can receive the contact status signal of the corresponding area.

[0074] The ambient temperature detection unit is used to detect the ambient temperature around the blanket. It can be installed on the controller housing or near the connection line in a location not directly affected by the zone heating. It is used to provide a reference for the target temperature correction during normal temperature control.

[0075] The connector is used not only for transmitting electrical energy and sensing signals, but also preferably has built-in identification elements, such as coded resistors, contacts with different conduction combinations, coded terminals, or one-wire identification chips. Upon power-up, the controller reads the signals from the identification elements to determine the model, rated power, number of zones, and parameter table version of the currently connected heating liner.

[0076] The zone drive circuit can employ relays, bidirectional thyristors, MOS switch arrays, PWM power modulation circuits, or combinations thereof, to supply power to each heating zone according to the controller's control commands. For scenarios requiring fine power control, PWM power regulation is preferred; for scenarios requiring only on / off and multi-level control, segmented power supply control can also be used.

[0077] The user interface can be located on a handheld controller or control box, and includes at least a power switch, a gear selection button, a mode selection button, and a status display unit. The alarm module can provide alerts for abnormal lining conditions, zone abnormalities, overheat protection, etc., through one or more methods such as a buzzer, indicator light, display screen, or wireless notification.

[0078] Those skilled in the art will understand that the above-described system architecture provides the hardware foundation for implementing the control method of the present invention. Any system capable of performing zoned temperature acquisition, human contact status acquisition, anomaly joint determination, and zone-level safety control falls within the scope of this invention.

[0079] III. Overall Technical Route for Implementing the Method of the Invention

[0080] Combination Figure 5The control method of this invention can be summarized as follows: After power-on, the controller first performs initialization and lining identification; after successful identification, it enters the normal operation preparation state; then, it periodically collects the temperature and human contact status signals of each zone; for each zone to be detected, the temperature rise rate and zone temperature difference are calculated; then, the human contact status signal is used as a necessary judgment condition, which, together with the temperature rise rate and zone temperature difference, constitutes the abnormal identification condition; once a target zone is determined to be in an abnormal folding or abnormal stacking state, only the target zone is subjected to derating or power-off control, while other non-abnormal zones continue to work; after the abnormal condition is resolved and the recovery cycle is reached, the target zone is allowed to resume normal power supply; when no abnormality occurs, comfort temperature control, zone target temperature adjustment, and long-term operation protection can be further performed according to the ambient temperature, user-set gear, and human contact status.

[0081] The core innovation of the above approach does not lie in the separate introduction of temperature acquisition, human body sensing, or overheat protection, but rather in: identifying typical non-human contact localized heat accumulation risks in the use of sleeved blankets by jointly judging three types of information: temperature rise rate, temperature difference between adjacent zones, and human contact status; and balancing safety and warmth experience through zone-level, selective safety control. The following is a detailed description in conjunction with the steps of the claims.

[0082] (I) Step S1: Implementation method of zoned temperature acquisition and initialization

[0083] Step S1 is mainly used to establish the real-time temperature base data required for subsequent anomaly determination in this invention, and to ensure that the initial state of the heating lining and each zone can be reliably identified.

[0084] In this embodiment, when the user presses the power button, the controller first initiates the power-on initialization procedure. This initialization procedure includes the following sub-procedures:

[0085] First, the controller reads the identification element in the connector. It obtains the model information represented by the identification element through ADC sampling, digital I / O identification, or bus communication. For example, when the connector is configured with an coded resistor, the controller applies a reference voltage to the identification terminal and detects the voltage value. Then, based on the voltage mapping table, it determines whether the current heated lining is a 1cm x 1cm sleeved blanket lining with a rated power of 80W, or a lining of other sizes and power specifications. If identification fails, parameters exceed limits, or the reading result does not match the current control program version, heating output is directly prohibited, and an alarm module indicates an abnormal lining or model mismatch.

[0086] Second, a loop check is performed on each temperature detection unit. The controller collects the raw values ​​from each temperature detection unit during the heating-off or low-power testing phase to determine if they fall within a reasonable range. For example, an NTC thermistor should correspond to a certain resistance range at room temperature. If the sampled value is close to an open circuit or short circuit, the temperature detection of that zone is deemed abnormal, and that zone is prohibited from normal operation.

[0087] Third, continuity testing is performed on each heating circuit. The controller can determine whether there is an open circuit, short circuit, or partial breakdown in the heating circuit of each zone by detecting the current values ​​under no-load, light-load, and test load conditions of the zone's drive circuit. If an abnormality is detected, the zone is marked as unusable.

[0088] Fourth, establish initial temperature buffers. The controller establishes temperature buffer arrays for the torso, leg, foot, left sleeve, and right sleeve areas, recording temperature values ​​within several consecutive sampling periods for subsequent temperature rise rate calculations. Preferably, each zone stores at least 3 to 10 of the most recent sampled values ​​to enable smooth calculations, anomaly filtering, and trend analysis.

[0089] Fifth, enter standby or normal heating preparation state. If the user has set the working mode and level, the controller can first run at low power for a short time window to further verify whether the temperature response of the zones is reasonable; if the temperature of a certain zone rises abnormally slowly or abnormally quickly, it can also be marked as a restricted zone before formal operation.

[0090] Through the above initialization process, this invention not only completes the general power-on self-test, but also further incorporates the identification of the heating liner and the reliability of zone temperature sampling into the overall control logic, providing a foundation for subsequent fine-grained safety control. Unlike traditional solutions that treat the liner as a fixed heating element, this embodiment emphasizes that when the heating liner is detachable, the liner's model, connection status, and zone parameters are themselves prerequisites for safety control.

[0091] In a preferred embodiment, the controller can record the initial temperature of each zone as... ,in, Indicates the partition number. This indicates the current sampling time. When the system has just entered the working state, it can be obtained through continuous sampling:

[0092] ;

[0093] in, For the first The partition in the _th ... The real-time temperature value at the time of sampling can be expressed in degrees Celsius. This temperature series will be used for subsequent calculations of the temperature rise rate and identification of abnormal trends.

[0094] Step S1 itself is a fundamental supporting step of the entire method. Its main contribution is to provide a reliable temperature source for subsequent joint determination and to incorporate the identification of removable lining into the control starting point to prevent misjudgment and miscontrol caused by parameter mismatch.

[0095] (II) Step S2: Calculation of zone temperature rise rate and zone temperature difference

[0096] Step S2 is a crucial component of the core control chain of this invention. Instantaneous temperature values ​​alone are often insufficient to accurately determine whether a zone is in a dangerous state. This is because, under normal human contact conditions, the zone temperature will still rise after a person is covered with a blanket. If temperature is used as the sole criterion, false triggering of the protection system is highly likely. Therefore, this invention introduces two dynamic features: the rate of temperature rise and the zone temperature difference, reflecting whether the target zone is heating up too quickly and whether localized hot spots have formed, respectively.

[0097] 1. Calculation of temperature rise rate

[0098] For any target partition The controller calculates its temperature rise rate based on the temperature values ​​from the two or more most recent sampling periods. The simplest calculation method is:

[0099] ;

[0100] in, For the first The partition in the _th ... The temperature rise rate corresponding to the next sampling; For the first The partition in the _th ... Real-time temperature at the time of the second sampling; For the first The real-time temperature of each partition at the previous sampling time; This represents the time interval between two adjacent samples.

[0101] When enhanced noise immunity is required, a multi-cycle average temperature rise rate can also be used:

[0102] ;

[0103] in, For the first The multi-cycle average temperature rise rate of each zone; The number of sampling periods involved in the average calculation, and .

[0104] In practical applications, the controller can simultaneously calculate the instantaneous temperature rise rate and the average temperature rise rate over a short window. When the instantaneous temperature rise rate is continuously greater than the first threshold and the average temperature rise rate also remains high, it indicates that the target partition is experiencing a continuous rapid temperature rise, which is more consistent with the characteristics of heat accumulation caused by abnormal stacking.

[0105] 2. Calculation of zone temperature difference

[0106] In order to determine whether the target zone has formed a local high and surrounding low temperature field, the present invention further calculates the temperature difference between the target zone and adjacent zones.

[0107] When the target area is the torso area, its adjacent areas can be the leg area, the left sleeve area, and the right sleeve area; when the target area is the foot area, its adjacent areas are usually the leg area; when the target area is a sleeve area, its adjacent areas can be the torso area or the corresponding sleeve root area.

[0108] Preferably, the temperature difference between the target zone and adjacent zones can be calculated as follows:

[0109] ;

[0110] in, For target partition The temperature difference between it and its adjacent zones; To be related to the target partition An adjacent partition in the 1st Real-time temperature at the time of the second sampling.

[0111] When a target partition has multiple adjacent partitions, the temperature difference between the target partition and the average temperature of the adjacent partitions can also be used:

[0112] ;

[0113] in, For the target partition and its The temperature difference between the average temperatures of adjacent zones; For the first The adjacent partitions in the th... Temperature at the time of the second sampling; This represents the number of adjacent partitions.

[0114] If a target area heats up rapidly within a short period of time, and its temperature is significantly higher than that of surrounding areas, then that area is more likely to be in a state of localized folding, stacking, or impeded heat dissipation, rather than experiencing a uniform overall temperature rise caused by normal human body covering. This is because normal human body covering usually causes adjacent areas to heat up synchronously, resulting in a gentler temperature gradient; while abnormal stacking is more likely to create sharp localized hot spots.

[0115] 3. Relationship with the innovative points of this invention

[0116] The key to step S2 lies not in simply providing a set of mathematical formulas, but in providing an operable technical basis for the joint anomaly determination in step S4 through the combination of dynamic and spatial characteristics. The temperature rise rate reflects anomalies in the time dimension, and the zone temperature difference reflects anomalies in the spatial dimension. Together, they constitute the physical basis for this invention to identify localized heat accumulation in non-human contact areas.

[0117] In one example, if the average temperature rise rate of the foot area is significantly higher than the first threshold over three consecutive sampling periods, while the temperatures of the leg and torso areas only rise slightly, it indicates that the foot area may have been rolled, squeezed, or stuffed into a sofa gap, rather than simply being caused by the foot being inserted normally. In this case, combining this with the fact that the human body contact is non-contact can further improve the reliability of anomaly detection.

[0118] (III) Step S3: Implementation method of human body contact status signal acquisition and processing

[0119] The purpose of step S3 is to incorporate information about whether the human body is in contact with the blanket, thus correcting the protection logic that relies solely on temperature judgment. The usage scenario of sleeved blankets differs from that of traditional electric blankets; human contact is highly dynamic: the sleeves may be occupied by the arm at times and left empty at others; the foot area may be deeply covered or left unsupported; the chest coverage area may vary in tightness depending on the user's posture. Therefore, only by incorporating the state of human contact into the judgment can normal heating and abnormal heat accumulation be distinguished.

[0120] 1. Location of the contact detection unit

[0121] In this embodiment, the human contact detection unit is preferably disposed in one or more of the following locations:

[0122] (1) The area covered in front of the chest corresponds to the trunk area;

[0123] (2) Foot coverage area, corresponding to the foot area;

[0124] (3) The left sleeve and the right sleeve correspond to the left sleeve arm area and the right sleeve arm area;

[0125] (4) If necessary, contact detection points can also be set in the leg coverage area to improve the accuracy of leg area judgment.

[0126] With the above arrangement, the present invention can cover the critical areas in sleeved blankets where contact / non-contact switching is most likely to occur.

[0127] 2. Methods for acquiring contact status signals

[0128] Human contact detection units can be implemented in different forms:

[0129] Firstly, pressure sensing. When a user's body, arm, or foot presses against the corresponding area, the pressure sensor outputs an electrical signal. The controller determines whether it is contact or non-contact based on whether the pressure value exceeds a preset threshold.

[0130] Secondly, there is the capacitive contact method. When a human body approaches or touches the sensing surface, the capacitance value changes, and the controller determines the contact state by comparing a reference value with a real-time value.

[0131] Thirdly, the conductive contact method. By forming a conductive structure inside the flexible fabric, a contact status signal is output when the human body covers the two contact layers, causing them to come into contact or when the resistance changes.

[0132] Fourth, a hybrid approach. For example, pressure sensors can be used in the foot area, while conductive contacts or capacitive sensors can be used in the sleeves to adapt to the fabric deformation characteristics of different areas.

[0133] 3. Processing logic for contact status signals

[0134] The controller does not necessarily use the raw sensor values ​​directly, but rather filters, debouncing, and makes state decisions on them. For example, it can be defined as follows:

[0135] ;

[0136] in, For the first The partition in the _th ... The contact status determination value at the time of the next sampling.

[0137] To avoid misjudgments caused by fabric shaking, brief light touches, or transient noise from the sensor, this embodiment requires the contact signal to remain continuously for several sampling cycles before changing its state. For example, when the contact signal of a certain zone is higher than a threshold for three consecutive sampling cycles, it is determined that it has switched from non-contact to contact; when it is lower than the threshold for three consecutive sampling cycles, it switches back to non-contact.

[0138] 4. The role of the contact state in this invention

[0139] Unlike typical human body sensor switches, the contact status signal in this invention is not simply used to determine whether someone is present, but rather serves as one of the necessary conditions for anomaly detection. In other words, even if a target area exhibits high temperature and a large rate of temperature rise, as long as it is in a normal human contact state, it should not be immediately treated as an abnormality. Conversely, when a target area is in a non-human contact state but experiences rapid temperature rise and significant localized high temperatures, it should be determined that it poses a danger.

[0140] This design enables the invention to effectively reduce false protections. For example, when a user inserts both feet into the foot-covered area and remains still for a long time, it is reasonable for the temperature of the foot area to rise. If only the temperature value is used for judgment, the system may frequently derate, affecting usability. However, by adding the contact state, the system can recognize that this is a normal temperature rise under contact conditions, thereby improving the accuracy of judgment.

[0141] Step S3 is another key difference between this invention and ordinary overheat protection, as it enables the control logic of this invention to have context-aware capabilities.

[0142] (iv) Step S4: Implementation method for joint determination of abnormal folding / stacking states

[0143] Step S4 is one of the most inventive steps in this invention and is the core of the entire technical solution. It will be described in detail below.

[0144] Traditional electric blankets typically use a single temperature threshold, system timer, or overcurrent protection to prevent hazards. This approach is suitable for flat surfaces with relatively simple usage patterns. However, in actual use, sleeved blankets often experience localized folding, stacking, sleeve rolling, foot pocket folding, and hem tucking. These situations share a common characteristic: sudden changes in heat dissipation conditions in localized areas, causing abnormal heat accumulation and the formation of hot spots when not in contact with the human body. If a single temperature threshold protection is still used, a contradiction arises between insufficient protection in truly hazardous situations and malfunctions during normal contact heating.

[0145] The present invention solves the above problems through the following joint judgment logic: the target partition is judged to be in an abnormal folding or abnormal stacking state only when the three conditions are met simultaneously: the temperature rise rate is greater than the first threshold, the temperature difference between the partitions is greater than the second threshold, and the human body contact state is non-contact.

[0146] 1. Physical meaning of the judgment condition

[0147] The first condition is that the rate of temperature rise is greater than the first threshold.

[0148] This indicates that the target area is heating up too quickly in a short period of time, suggesting a significant imbalance between heat output and heat dissipation capacity. Under normal coverage, the temperature will rise, but the heating process is usually relatively gradual; however, folding and stacking trap heat in localized areas, leading to a significantly faster temperature rise.

[0149] The second condition is that the temperature difference between zones is greater than the second threshold.

[0150] This indicates that the target zone has formed a local high-temperature island relative to the surrounding zones. If it is just that the environment cools down or the user increases the power, multiple adjacent areas will generally heat up synchronously, and there will not be an excessively steep temperature gradient; however, local stacking will make the temperature of the target zone much higher than that of the neighboring areas. Therefore, the temperature difference between zones is an important spatial feature for identifying local structural anomalies.

[0151] The third condition is that the human body is in a non-contact state.

[0152] This indicates that the current localized high temperature does not originate from normal human body insulation, but rather from localized heat accumulation formed without human body pressure, heat absorption by the human body, or reasonable covering, making it more dangerous.

[0153] Combining these three elements can significantly improve the robustness of anomaly detection. For example:

[0154] If the target area heats up quickly, but a person is in contact with it, it may be normal preheating or high-level warmth, and it is not necessarily dangerous.

[0155] If the temperature of the target zone is higher than that of the neighboring zone, but the heating rate is not fast, it may be due to the difference in zone power settings, and it may not necessarily be a sudden anomaly.

[0156] If the target zone is in a non-contact state, but the temperature rise rate and temperature difference are not high, it only indicates that the area is vacant and does not require protection to be triggered.

[0157] Only when all three conditions are met simultaneously can one be fairly certain of the existence of abnormal localized heat accumulation.

[0158] 2. Continuous Period Determination Mechanism

[0159] To avoid misjudgments caused by noise from a single sampling, this implementation preferably employs a continuous periodicity mechanism. Let the anomaly detection function be denoted as:

[0160] ;

[0161] in, Indicates the first The partition in the _th ... Anomaly detection results during the second sampling; The first threshold for the rate of temperature rise; The second threshold for temperature difference between zones; This indicates that the target partition is in a state of non-human contact.

[0162] To improve reliability, the following requirements may be made:

[0163] ;

[0164] It was only then that the first [unclear] was finally confirmed. Several partitions entered an abnormal folding or abnormal stacking state, among which... The number of consecutively valid sampling periods, and .

[0165] For example, the controller can be set to a sampling period of 1 second and a continuous judgment period of 3. The system only enters the anomaly confirmation state when the foot area meets the triple abnormal conditions for 3 consecutive seconds. This can shorten the response time and reduce the probability of noise-induced false triggering.

[0166] 3. Adaptive threshold setting for different partitions

[0167] Because the structures and thermal inertia of each partition are different, this invention preferably sets different thresholds for different partitions. For example:

[0168] The foot area is typically a relatively enclosed structure, and its temperature rises slightly faster during normal use, therefore its It can be placed slightly higher than the torso area;

[0169] The sleeve area is relatively narrow and long, and easily rolls up. When layered, the hot spots become more concentrated, therefore... It can be set to be more sensitive;

[0170] The trunk area has a large coverage area and many adjacent areas, making its average temperature difference characteristics more suitable as a basis for judgment.

[0171] The controller can read the threshold groups corresponding to each partition from the parameter table based on the lining model information represented by the identification element, without the need for manual configuration one by one.

[0172] 4. Figure 6 Explanation of the identification of the abnormal scene shown

[0173] Combination Figure 6 When the right sleeve area is rolled up and pressed under the chest coverage area when no one is wearing the sleeve, the heating wires overlap locally, resulting in a relatively concentrated heat density. At this time, the temperature rise rate of the right sleeve area increases rapidly, while the temperature rise of the torso area is relatively moderate due to its larger area and normal heat dissipation conditions, thus creating a significant temperature difference. Simultaneously, because the human contact detection unit at the right sleeve does not detect arm contact, the controller can classify this state as abnormal stacking, rather than normal sleeve insulation.

[0174] For example, when the foot area is left unattended and folded over the edge of a sofa cushion, the foot area experiences rapid localized temperature rise even when no one is touching it, while the leg area experiences a smaller temperature rise. The controller can also identify this abnormal state.

[0175] 5. Creative effect

[0176] The technical benefits of step S4 are significant: it moves beyond the crude approach of simply cutting off power when the temperature reaches a threshold, and instead establishes an anomaly detection model closely related to the actual usage of sleeved blankets. This model can distinguish between normal body covering and temperature rise, and localized heat accumulation in non-human contact areas, thereby improving safety detection sensitivity and reducing the probability of false alarms. This is particularly important for complex and flexible products such as sleeved blankets, footed blankets, and chest-covering blankets.

[0177] (V) Step S5: Implementation of Selective Security Control for Abnormal Partitions

[0178] Step S5 is a control action implemented after the anomaly has been confirmed in step S4, and it also represents a significant part of the invention's inventive contribution. Unlike traditional whole-machine shutdown, this invention emphasizes localized processing of the abnormal zone, rather than simply cutting off the power supply to the entire blanket.

[0179] 1. The basic idea of ​​selective safety control

[0180] In scenarios where sleeved blankets are used, users often need continuous warmth. For example, during reading, working, resting on the sofa, or watching a movie, if only one sleeve folds abnormally and the system shuts down entirely, the user's torso and legs will immediately lose heat, severely impacting the experience and potentially causing significant discomfort in cold environments. Therefore, this invention proposes that when only one or a few zones are identified as abnormal, priority should be given to reducing the power consumption or cutting off power to these abnormal zones, while ensuring that at least one non-abnormal zone continues to operate.

[0181] This control approach offers two advantages: first, it confines risk control to the source area, preventing localized overheating from spreading; second, it maximizes the normal insulation function of the remaining areas, thus balancing safety and comfort.

[0182] 2. Two-level or multi-level security handling strategy

[0183] In a preferred embodiment, the present invention employs a two-level security process:

[0184] Level 1: Reduced power supply.

[0185] When a target zone is first confirmed to be abnormal, the controller does not immediately cut off the power. Instead, it reduces the PWM duty cycle, conduction time, or effective output power of that zone to a preset safe power, such as 20% to 60% of the original power. This can quickly reduce the trend of continued temperature rise, while avoiding over-processing of some occasional abnormalities caused by short-term slight folding.

[0186] The second step is to cut off the power supply.

[0187] If the target zone continues to meet the anomaly detection conditions for a preset duration after derating, the controller will further cut off the power supply to that target zone until the anomaly is resolved. At this time, the system can prompt the user to adjust the blanket status or put it back on via the alarm module. For finer control, a three-level processing can be set: first, power limiting; then, low-power pulse power supply; and finally, complete power cut-off.

[0188] 3. Strategy for maintaining non-abnormal partitions

[0189] When a zone enters an abnormal operation, the controller preferably keeps at least one non-abnormal zone in the torso and foot areas running at its original or limited power. This is especially important at night or in cold environments, where the torso and foot areas have a significant impact on overall comfort; maintaining their operation can significantly reduce discomfort caused by overall system shutdown.

[0190] For example, if the right arm area is abnormal, the torso and leg areas can be kept running; if the foot area is abnormal, the torso and arm area can be kept running, and the user will be prompted to check the foot area.

[0191] 4. Recovery Mechanism

[0192] To prevent abnormal partitions from becoming permanently unrecoverable after a power outage, this invention also includes a recovery mechanism after the abnormality is resolved. After the controller derated or powered off an abnormal partition, it continues to collect the partition's temperature, the temperature difference between adjacent partitions, and the human contact status, and determines whether the abnormal conditions have been continuously invalidated to reach the recovery cycle.

[0193] For example, when the target partition satisfies:

[0194] ;

[0195] and maintain continuously After one sampling period, the abnormal state can be considered to have been resolved. This is the number of recovery cycles. After recovery, the controller can first restart the partition at low power, and then gradually increase the power to the user-set power, thereby avoiding triggering the anomaly again during the recovery process.

[0196] 5. Figure 7 Explanation of the timing shown

[0197] Combination Figure 7 The target partition's state can sequentially progress through: normal operation phase, anomaly confirmation phase, first-level derating phase, second-level power outage phase, recovery observation phase, and power restoration phase. The transitions between these phases can be implemented using a state machine. For example:

[0198] Status 0: Normal operation;

[0199] State 1: Abnormal candidate;

[0200] Status 2: Level 1 Reduction;

[0201] Status 3: Level 2 power failure;

[0202] Status 4: Resumption of observation;

[0203] Status 5: Power restored.

[0204] The controller updates the state machine at any given time based on the latest sampled data, thus achieving real-time closed-loop control.

[0205] 6. Creative effect

[0206] The innovation of step S5 lies in upgrading the safety protection from a coarse, system-wide control to a zone-level selective control. This avoids both the continued overheating of abnormal local areas and unnecessary interruption of the overall insulation function. For products like sleeved blankets, where actual usage conditions are highly uncertain and localized folding is frequent, this control method is significantly superior to simple overall power-off protection.

[0207] (vi) Step S6: Implementation of abnormality resolution and recovery, normal temperature control and extended control

[0208] Step S6 mainly involves the recovery strategy after the anomaly is resolved, and describes the comfort control and extended protection of the present invention when there is no anomaly. Although its inventive contribution is lower than that of steps S4 and S5, it is necessary for the present invention to achieve a complete control effect that is implementable and usable for a long time.

[0209] 1. Restoring power supply after the anomaly is resolved

[0210] As mentioned earlier, when the anomaly detection conditions of the target partition are continuously not met, reaching the recovery cycle, the controller will gradually restore the abnormal partition from the power-off or derating state. Preferably, the recovery process includes:

[0211] (1) Resumption of observation: After confirming that the abnormal conditions have been resolved, delay for a short time window to confirm that the fluctuation is not instantaneous;

[0212] (2) Low-power trial recovery: Restart the target partition with a lower PWM duty cycle;

[0213] (3) Monitoring recovery: If the temperature rise rate and zone temperature difference remain safe after the trial recovery, then return to normal control;

[0214] (4) If an abnormality occurs again, the system will revert to a derated or power-off state immediately.

[0215] This mechanism of observation and trial restoration helps to avoid rushing to full power restoration before the blanket has been properly smoothed out.

[0216] 2. Normal temperature control involving ambient temperature

[0217] When no anomalies are detected, the controller can also adjust the target power for each zone based on the output of the ambient temperature detection unit. For example, the lower the ambient temperature, the slightly higher the initial output power for the same user setting; when the ambient temperature is higher, the output power for the torso and leg areas is appropriately reduced. Ambient temperature correction is mainly used to improve comfort and is not a necessary prerequisite for anomaly detection.

[0218] 3. Zonal comfort control involving human contact status

[0219] Under normal circumstances, the human body contact status signal can also be used for comfort control. For example, when the sleeve area is in a non-contact state for a long time, the controller can automatically reduce the output power of the corresponding sleeve area; when the foot area detects a stable contact state, it can maintain the appropriate warmth power in that area. This function can further reduce energy waste caused by no-load heating.

[0220] 4. Independent working time protection

[0221] The controller can also set independent operating timers for each zone. When the cumulative operating time of any zone exceeds the first time threshold, the target power or target temperature of that zone is reduced; when it exceeds the second time threshold, the zone is shut down. A total usage time limit can also be set at the system level. This function is used to supplement long-term safety protection.

[0222] 5. Stage control of sleep patterns

[0223] In some embodiments, the user can select a sleep mode. In sleep mode, the controller performs temperature control on the torso, feet, and sleeves at different stages based on the sleep onset period, stable sleep period, and wake-up warm-up period. This part is a comfort enhancement solution that can further improve the user experience.

[0224] 6. Matching parameters for heating the lining

[0225] Combination Figure 8 After identifying the lining model, the controller can access the corresponding zone power limit table, safety threshold table, and recovery parameter table. For example, a lining measuring 1 cm x 1 cm and rated at 80W will have different threshold values ​​in the foot and sleeve areas compared to a larger lining with different heating line densities. By matching these parameter tables, this invention can adapt to different lining versions without altering the controller hardware, improving product platform compatibility and safety consistency.

[0226] The foregoing description of embodiments of the present invention, through which those skilled in the art are able to implement or use the present invention, will be readily apparent to those skilled in the art. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.

[0227] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0228] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0229] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0230] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0231] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0232] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0233] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

Claims

1. A method for zoned anomaly identification and selective safety control of a sleeved blanket, wherein the sleeved blanket comprises an outer blanket body, a heated inner lining, a controller, and multiple heated zones respectively disposed in the torso area, leg area, foot area, and sleeve area, each heated zone being equipped with a heating circuit and a temperature detection unit, characterized in that, Includes the following steps: S1. The controller periodically collects real-time temperature data of each heating zone and calculates the temperature rise rate of the heating zone based on the temperature change of the same heating zone in two adjacent sampling periods. S2. The controller calculates the temperature difference between the target heating zone and at least one of its adjacent heating zones based on the real-time temperature data of each heating zone. S3. The controller collects a human contact status signal corresponding to the target heating zone. The human contact status signal is used to characterize whether the target heating zone is in a human body-covered contact state. S4. When the target heating zone simultaneously meets the following conditions, the controller determines that the target heating zone is in an abnormal stacking or abnormal folding state: The rate of temperature rise exceeds the first threshold. The temperature difference between the zones is greater than the second threshold. The human contact state signal represents a non-human contact state; S5. After determining that the target heating zone is in an abnormal stacking or abnormal folding state, the controller performs selective safety control only on the target heating zone, while keeping at least one non-abnormal heating zone working. The selective safety control includes: reducing the output power of the target heating zone to below a preset safe power, or cutting off the power supply to the target heating zone. S6. The controller continuously monitors the temperature rise rate, temperature difference between zones, and human contact status signal of the target heating zone. When the abnormal judgment condition is not met for a preset recovery period, the selective safety control of the target heating zone is released, and the normal heating state of the target heating zone is restored.

2. The control method according to claim 1, characterized in that, The human body contact status signal is acquired by at least one contact detection unit located in the cuff area, chest coverage area, and foot coverage area. The contact detection unit is any one or a combination of at least two of the following: pressure sensor, conductive contact, piezoresistive sensor, and capacitive contact sensor.

3. The control method according to claim 1, characterized in that, The zone temperature difference is the difference between the temperature of the target heating zone and the lower of the temperatures of its left and right adjacent zones, or the difference between the temperature of the target heating zone and the average temperature of its multiple surrounding adjacent zones.

4. The control method according to claim 1, characterized in that, When the controller executes step S4, it does not make an anomaly determination based on a single sampling period. Instead, it requires that the conditions of the temperature rise rate being greater than the first threshold, the temperature difference between the zones being greater than the second threshold, and the human contact state signal being characterized as a non-human contact state be met continuously for at least N sampling periods before determining that the target heating zone is in an abnormal stacking or abnormal folding state, where N is an integer greater than or equal to 2.

5. The control method according to claim 1, characterized in that, The selective safety control includes two levels of protection: When the target heating zone first meets the abnormality determination condition, the output power of the target heating zone is reduced to 20% to 60% of the corresponding normal output power; If the target heating zone continues to meet the abnormal judgment condition for a preset duration after derating, the power supply to the target heating zone is cut off.

6. The control method according to claim 1, characterized in that, When the target heating zone is determined to be in an abnormal stacking or abnormal folding state, the controller keeps at least one non-abnormal zone in the torso area and foot area running at the original set power or at the limit power to avoid the whole system shutting down and causing the user to lose overall temperature. And / or, the heated inner lining of the sleeved blanket is connected to the controller via a connector, and the controller reads the identification element signal set in the connector during power-on initialization to identify the model information or installation status information of the heated inner lining; When the identification result is abnormal, all or part of the heating zone shall be prohibited from entering the heating state; Preferably, the identification element is any one of an coded resistor, an coded terminal, or a conductive combination contact; the controller calls the partition power limit parameter table and the partition safety threshold parameter table corresponding to the identified model based on the model information obtained.

7. The control method according to claim 1, characterized in that, The controller also collects ambient temperature data and, when no abnormal stacking or folding is detected, corrects the target temperature or output power of each heating zone based on the ambient temperature data; the lower the ambient temperature, the greater the correction value for the target temperature or output power of each heating zone. And / or, when no abnormal stacking or folding state is detected, the controller determines the target temperature for the torso area, leg area, foot area and sleeve area respectively based on the user-set comfort level and human body contact state signal; wherein, the foot area and sleeve area in the human body contact state are assigned a higher target temperature than in the non-contact state. And / or, the controller sets an independent operating timer for each heating zone. When the cumulative operating time of any heating zone exceeds a first time threshold, the target temperature of that heating zone is lowered; when the cumulative operating time of any heating zone exceeds a second time threshold, that heating zone is shut down; wherein, the second time threshold is greater than the first time threshold. And / or, the controller is configured with a sleep mode, in which the target temperature of at least some heating zones is adjusted in stages according to the sleep onset period, the stable sleep period, and the wake-up preheating period; wherein, the target temperature of the torso and foot areas is increased first during the sleep onset period, the overall target temperature is decreased during the stable sleep period, and the target temperature of the torso and sleeve areas is increased during the wake-up preheating period.

8. A zoned anomaly identification and selective safety control system for a sleeved blanket, characterized in that, include: The sleeved blanket body includes an outer blanket body and a heated inner lining; Multiple heating zones, the multiple heating zones including at least a torso zone, a leg zone, a foot zone, and a sleeve / arm zone; Multiple temperature detection units are respectively set in each heating zone; At least one human contact detection unit is provided for outputting a human contact status signal; The partition drive circuit is used to drive each heating partition to work separately; A controller connected to a plurality of temperature detection units, the human contact detection unit and the partition drive circuit, and configured to perform the control method according to any one of claims 1 to 7.

9. A computer-readable storage medium having a computer program or instructions stored thereon, characterized in that, When the computer program or instructions are executed by a processor, they implement the steps of the method described in any one of claims 1-7.

10. A computer program product, comprising a computer program or instructions, characterized in that, When the computer program or instructions are executed by a processor, they implement the steps of the method described in any one of claims 1-7.

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