Anti-condensation control system and fault detection method for chip high and low temperature aging experiment box

Abstract

The invention provides an anti-condensation control system for a chip high and low temperature aging experiment box. The anti-condensation control system comprises a sampling module, a control module and an execution module, the sampling module comprises sensors arranged in the high and low temperature test box, the temperature of a high and low temperature area of the high and low temperature test box and the temperature and humidity of a heat preservation area and a normal temperature area are respectively collected, and the collection result of the sampling module is used for the control module to analyze the condensation risk and open or close the anti-condensation system; the execution module comprises an anti-condensation heating belt, a drying compressed air device and an anti-condensation fan, and the execution module executes various anti-condensation measures according to the control of the control module. The invention further provides a fault detection method for the chip high-low temperature aging test box anti-condensation control system, the chip high-low temperature aging test box anti-condensation control system can be effectively monitored, problems of the control system can be found in time, and a control strategy is adjusted. The invention also provides a fault detection method for the anti-condensation control system of the chip high and low temperature aging experiment box.

Description

Technical Field

[0001] The invention belongs to the technical field of chip testing, and in particular relates to a chip high and low temperature aging test box anti-condensation control system and a fault detection method. Background Art

[0002] As one of the important products in the environmental testing industry, aging test chambers are mainly used to simulate extreme temperature environments to evaluate the durability and reliability of electronic products. Aging tests are particularly important for semiconductor memory. Such memory devices have a certain probability of failure during their life cycle, and this probability usually presents the characteristics of a "bathtub curve" - ​​that is, the failure rate is high in the early and late stages, and relatively stable in the middle stage. In order to ensure product quality, manufacturers use aging test chambers to apply high-temperature and low-temperature cycle stress to the memory to accelerate the exposure of potential defects, thereby eliminating defective products in advance and prompting the remaining products to quickly enter a stable use stage.

[0003] In actual operation, the aging test of memory chips needs to run continuously for a specific period of time in a precisely controlled high and low temperature environment, which places strict requirements on the technical performance of the aging test chamber. Especially for the large volume, high performance and wide operating temperature range of memory chips, the test chamber must be able to operate continuously, stably and reliably.

[0004] In order to meet these needs, modern memory chip aging test chambers are designed with multiple temperature control zones, including low temperature zone, high temperature zone, transition zone (insulation zone) and normal temperature zone. Among them, the high and low temperature zone and the normal temperature zone already have effective anti-condensation technology, while the transition zone generally adopts anti-condensation heating belt and single temperature controller to achieve the purpose of anti-condensation. However, the traditional single heating control mode is often difficult to achieve precise temperature regulation, and lacks an effective fault detection mechanism, which may cause the anti-condensation function to fail, and then cause serious problems such as short circuit of the test board, which seriously affects the accuracy and safety of the test.

[0005] Therefore, it is necessary to improve and optimize the anti-condensation function of the transition zone of the existing aging test chamber so that it can effectively maintain a constant temperature while accurately detecting anti-condensation abnormalities, faults and other conditions to avoid the expansion of faults and affect the accuracy and safety of the test. Summary of the invention

[0006] The present invention provides a chip high and low temperature aging test box anti-condensation control system, which combines a variety of anti-condensation measures and cooperates with a monitoring module, which can not only effectively prevent condensation from occurring in the transition area of ​​the high temperature test box, but also effectively monitor the system to prevent system failures from affecting the accuracy and safety of the test.

[0007] The present invention also provides a fault detection method for a chip high and low temperature aging test box anti-condensation control system, which can monitor the high and low temperature aging test box anti-condensation control system in real time, thereby reducing the risk of condensation on the test board during the test and reducing the risk of damage.

[0008] Other purposes and advantages of the present invention can be further understood from the technical features disclosed in the present invention.

[0009] In order to achieve one or part or all of the above purposes or other purposes, a technical solution of the present invention provides a chip high and low temperature aging test box anti-condensation control system, including a sampling module, a control module, and an execution module; the sampling module includes a sensor arranged in the high and low temperature test box, which respectively collects the temperature of the high and low temperature area of ​​the high and low temperature test box, the temperature and humidity of the insulation area, and the temperature and humidity of the normal temperature area, and the sampling module collects the results for the control module to analyze the condensation risk and turn on or off the anti-condensation system; the execution module includes an anti-condensation heating belt, a dry compressed air device, and an anti-condensation fan, and the execution module executes a variety of anti-condensation measures according to the control of the control module; The dry compressed air equipment generates dry compressed air and is controlled by a solenoid valve to flow into the high and low temperature test chamber; The monitoring module includes a sensor monitoring module connected to the sampling module, a controller state monitoring module connected to the control module, an anti-condensation heating belt state monitoring module connected to the anti-condensation heating belt, a solenoid valve state monitoring module connected to the solenoid valve, and a fan monitoring module connected to the fan; After the sensor monitoring module detects the fault information, the sensor data before the fault and the sensor data at the time of the fault are transmitted to the control system, and the control system retrieves the historical data for comparison to confirm whether the sensor in the sampling module is a real fault; after the controller status monitoring module detects the controller fault, the control system shuts down and saves the data before and after the controller fault; after the anti-condensation heating belt status monitoring module, the solenoid valve status monitoring module and the fan monitoring module detect the fault information, the corresponding operating data before and after the anti-condensation heating belt fault, the operating data before and after the solenoid valve fault, and the operating data before and after the fan fault are transmitted to the control system, the control system confirms the uploaded data with the historical data, and outputs the fault judgment result, and triggers the fault response processing program at the same time, and the system makes corresponding processing based on the temperature, humidity and the execution module fault condition; The fault response processing program sets the corresponding weight ratio according to the anti-condensation effects of the three anti-condensation measures in the execution module, and combines the fault conditions of the anti-condensation measures and the current temperature and humidity conditions of the high and low temperature aging test chamber to determine whether to shut down or output a prompt alarm message without shutting down.

[0010] The transformer converts the incoming AC power into low voltage to power the anti-condensation heating belt, the solenoid valve and the anti-condensation fan; a solid-state relay is also provided on the connection line between the anti-condensation heating belt and the transformer, and the solid-state relay is connected to the output end of the control module for controlling the operation of the anti-condensation heating belt.

[0011] The sampling module also includes a gas flow sensor connected in series to the terminal pipeline of the solenoid valve, which is used to detect the flow rate of dry compressed air transmitted to the anti-condensation area; and a fan Hall sensor integrated in the anti-condensation fan stator, which is used to detect the fan speed; the dry compressed air flow rate, fan speed, temperature of the high and low temperature areas, temperature and humidity of the insulation area, and temperature and humidity of the normal temperature area collected by the sampling module are sent to the control module for data analysis, and the control module sends control instructions to the execution module.

[0012] The monitoring module is a separate controller, or the monitoring module is a monitoring subroutine embedded in the control module.

[0013] Another technical solution of the present invention provides a fault detection method for an anti-condensation control system of a chip high and low temperature aging test box, comprising the following steps: S1. After the high and low temperature test box is started, the sensor in the sampling module obtains the temperature and humidity data inside and outside the box in real time. After receiving the temperature and humidity data, the sensor monitoring module verifies its authenticity. When the data is abnormal, the control system analyzes and determines whether to enable the backup sensor or ignore the erroneous sensor data; S2. After the data is verified to be correct, the control module receives the temperature and humidity data transmitted by the sampling module, calculates the dew point in the insulation zone, and analyzes the dew point risk. The controller status monitoring module detects the controller status. When a controller failure is detected, the machine is immediately shut down and an alarm message is output, such as If no controller fault is detected, the controller selects an anti-condensation strategy based on the dew point risk and outputs a control signal to the execution module; S3. When the control signal is transmitted to the execution module, the anti-condensation heating belt state monitoring module, the solenoid valve state monitoring module and the fan monitoring module detect the heating belt, the solenoid valve and the fan; if there is no abnormality in the heating belt, the solenoid valve and the fan, the control module maintains the current output control signal to the next control cycle; if there is an abnormality in the heating belt, the solenoid valve and the fan, the control system analyzes and determines whether the fault affects the operation. If it does not affect the operation, the control module prompts an alarm message and changes the control strategy, and changes the current output state to the next control cycle. If it affects the operation, it will stop immediately and output a prompt alarm message.

[0014] In step S3, when the heating belt, solenoid valve and fan are abnormal and do not affect the operation, the control system changes the control strategy and adjusts the execution of the execution module according to the weight ratio of the three anti-condensation measures set in the execution module, combined with the failure of the anti-condensation measures and the current temperature and humidity of the high and low temperature aging test chamber.

[0015] Compared with the prior art, the beneficial effects of the present invention mainly include: 1. The present invention comprehensively applies a variety of anti-condensation measures to the anti-condensation system of the high and low temperature aging test chamber for storage chips. The system analyzes the data collected by the sampling module through the control module, and outputs the corresponding control signal to the execution module to execute a combination of various anti-condensation measures to obtain a better anti-condensation effect.

[0016] 2. The anti-condensation control system adopts a closed-loop control method, which can detect fault information in time. If a single anti-condensation failure is detected, the system will summarize the information and decide whether the anti-condensation system is available. It can reduce the impact of a single fault on the test system and improve the reliability of the high and low temperature aging test chamber for storage chips.

[0017] 3. The anti-condensation control system can establish a big data model through accumulated data, comprehensively analyze the current operating status, give prompts or warning information, capture abnormal conditions in advance, and avoid greater harm.

[0018] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the composition of the anti-condensation control system of the present invention.

[0021] Figure 2 This is a schematic diagram of the composition and installation position of the sampling module of the present invention.

[0022] Figure 3 It is a schematic diagram of the structure of the control module of the present invention.

[0023] Figure 4 It is a schematic diagram of the execution module of the present invention.

[0024] Figure 5 It is a schematic diagram of the monitoring module of the present invention.

[0025] Figure 6 It is a specific implementation flow chart of the anti-condensation system fault detection of the present invention. DETAILED DESCRIPTION

[0026] The above and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only referenced to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention.

[0027] Embodiment 1 Embodiment 1 provides a chip high and low temperature aging test box anti-condensation control system, see Figure 1 The chip high and low temperature aging test box anti-condensation control system of the present invention includes a sampling module, a control module and an execution module. The sampling module is responsible for collecting the temperature or humidity or the combined data of temperature and humidity in each area of ​​the high and low temperature aging test box. The sampling module sends the collected data to the control module for analysis. The control module controls the start and stop timing of the anti-condensation system and controls the execution module to select corresponding anti-condensation measures based on the collected temperature and humidity data.

[0028] See also Figure 2 The acquisition module of the present invention includes a variety of sensors, a temperature sensor installed in the inner box (i.e., the high and low temperature area of ​​the high and low temperature test box), a temperature sensor and a humidity sensor installed in the transition zone (insulation zone), a temperature sensor and a humidity sensor installed in the outer box (normal temperature zone), a gas flow sensor connected in series in the terminal pipeline of the dry compressed air solenoid valve for anti-condensation, and a fan Hall sensor integrated in the stator of the anti-condensation fan.

[0029] Among them, the temperature of the box body is collected to control the start and stop timing of the anti-condensation system. The temperature and humidity of the transition area and the outer box area are collected, which can be used to judge the condensation risk, so that the control module can finely control the action of the anti-condensation measures in the execution module to achieve the expected effect. The dry compressed air flow rate and fan speed are collected to achieve anti-condensation closed-loop control. The dry compressed air flow rate, fan speed, temperature of the high and low temperature areas, temperature and humidity of the insulation area, and temperature and humidity of the normal temperature area collected by the sampling module are sent to the control module for data analysis, and the control module sends control instructions to the execution module.

[0030] See Figure 1The control system of the present invention is also provided with a monitoring module, which monitors the sampling module, the control module and the execution module to realize comprehensive monitoring of the anti-condensation control system. At the same time, the monitoring module of the present invention monitors when the sampling signal is output to the control module, when the control signal is output to the execution module and when the execution module is in action, thereby realizing closed-loop control of the anti-condensation system and being able to detect fault information in a timely manner.

[0031] See also Figure 3 The control module includes input interface, output interface, processor, memory, communication interface, expansion interface, etc. The above components in the control module communicate with each other through the bus. Among them, the input interface is used to receive data from the sampling module, the output interface connects to the execution module, the processor controls the execution module to complete the anti-condensation action by calling the logic control instructions in the memory, the communication interface connects to the touch screen or the host computer to transmit real-time operation data and fault information, and the expansion module provides an interface for reserved or redundant hardware.

[0032] See also Figure 4 The execution module of the present invention includes an anti-condensation heating belt, a CDA (dry compressed air) solenoid valve, and an anti-condensation fan. The dry compressed air is controlled by the solenoid valve to be introduced into the transition area, and the positive pressure in the transition area is maintained to prevent external humid air from entering. The anti-condensation heating belt, the CDA solenoid valve, and the anti-condensation fan are all powered by AC power access, where the AC power needs to be transformed by a transformer before supplying power to the anti-condensation heating belt, the CDA solenoid valve, and the anti-condensation fan. A solid-state relay is also provided on the line that supplies power to the anti-condensation heating belt from the transformer. The solid-state relay receives the control signal sent by the controller, and then controls the opening and closing timing of the anti-condensation heating belt.

[0033] As an implementation method, see Figure 5 The monitoring module of the present invention includes a sensor monitoring module connected to the sampling module, a controller status monitoring module connected to the controller, an anti-condensation heating belt status monitoring module connected to the anti-condensation heating belt, solenoid valve and fan in the execution module, a solenoid valve status monitoring module and a fan monitoring module. The monitoring module can monitor the anti-condensation control system and output the corresponding monitoring results to the system to facilitate the system to make decisions. The monitoring module of the present invention can be a separate controller, and the separate controller has multiple control programs or sub-modules to realize the monitoring of the sampling module, the control module and the execution module. Of course, the monitoring module of the present invention can also be a control subroutine or sub-module embedded in the control module to realize the function of the monitoring module of the present invention.

[0034] After the sensor monitoring module detects the fault information, the sensor data before the fault and the sensor data at the time of the fault are transmitted to the control system, and the control system retrieves the historical data for comparison to confirm whether the sensor in the sampling module is a real fault; after the controller state monitoring module detects the controller fault, the control system shuts down and saves the data before and after the controller fault; after the anti-condensation heating belt state monitoring module, the solenoid valve state monitoring module and the fan monitoring module detect the fault information, the corresponding operation data before and after the anti-condensation heating belt fault, the operation data before and after the solenoid valve fault and the operation data before and after the fan fault are transmitted to the control system, the control system confirms the uploaded data with the historical data, and outputs the fault judgment result, and triggers the fault response processing program at the same time. The system makes corresponding processing in combination with the temperature, humidity and the execution module fault condition. The fault response processing program sets the corresponding weight ratio according to the anti-condensation effect of the three anti-condensation measures in the execution module, and judges whether to shut down or output the alarm information without shutting down in combination with the anti-condensation measure fault condition and the current temperature and humidity of the high and low temperature aging test chamber.

[0035] Embodiment 2 Embodiment 2 provides a method for detecting faults in a chip high and low temperature aging test chamber anti-condensation control system. Figure 6 , including the following steps: S1. After the high and low temperature test chamber is started, the sensor in the sampling module obtains the temperature and humidity data inside and outside the chamber in real time. After receiving the temperature and humidity data, the sensor monitoring module verifies its authenticity. When the data is abnormal, the control system analyzes and determines whether to enable the backup sensor or ignore the erroneous sensor data; S2. After the data is verified, the control module receives the temperature and humidity data transmitted by the sampling module, calculates the dew point in the insulation zone, and analyzes the dew point risk. The controller status monitoring module detects the controller status. When a controller failure is detected, the controller is immediately shut down and an alarm message is output. If no controller failure is detected, the controller selects an anti-condensation strategy based on the dew point risk and outputs a control signal to the execution module. S3. When the control signal is transmitted to the execution module, the anti-condensation heating belt status monitoring module, the solenoid valve status monitoring module and the fan monitoring module synchronously detect the operating status of the heating belt, the solenoid valve and the fan; if there is no abnormality in the heating belt, the solenoid valve and the fan, the control module maintains the current output control signal to the next control cycle; if there is an abnormality in the heating belt, the solenoid valve and the fan, the control system analyzes and determines whether the fault affects the operation. If it does not affect the operation, the control module prompts an alarm message and changes the control strategy, and changes the current output state to the next control cycle. The change of control strategy here refers to selecting one or more remaining anti-condensation measures to run based on the anti-condensation effect of the anti-condensation measures that have not failed. If it affects the operation, the machine will be shut down immediately and an alarm message will be output.

[0036] In step S3, when the heating belt, solenoid valve and fan are abnormal and do not affect the operation, the control system changes the control strategy and adjusts the execution of the execution module based on the weight ratio of the three anti-condensation measures set in the execution module, combined with the failure of the anti-condensation measures and the current temperature and humidity conditions of the high and low temperature aging test chamber.

[0037] The above is a detailed introduction to a chip high and low temperature aging test box anti-condensation control system and fault detection method provided by the present invention. This article uses specific examples to illustrate the structure and working principle of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A chip high and low temperature aging test box anti-condensation control system, characterized in that: It includes sampling module, control module and execution module; The sampling module includes a sensor arranged in the high and low temperature test box, which respectively collects the temperature of the high and low temperature area of ​​the high and low temperature test box, the temperature and humidity of the insulation area, and the temperature and humidity of the normal temperature area. The sampling module collects the results for the control module to analyze the condensation risk and turn on or off the anti-condensation system; The execution module includes an anti-condensation heating belt, a dry compressed air device and an anti-condensation fan, and the execution module executes a variety of anti-condensation measures according to the control of the control module; The dry compressed air equipment generates dry compressed air which is controlled by a solenoid valve and flows into the high and low temperature test chamber; It also includes a monitoring module, which includes a sensor monitoring module connected to the sampling module, a controller state monitoring module connected to the control module, an anti-condensation heating belt state monitoring module connected to the anti-condensation heating belt, a solenoid valve state monitoring module connected to the solenoid valve, and a fan monitoring module connected to the fan; After the sensor monitoring module detects the fault information, the sensor data before the fault and the sensor data at the time of the fault are transmitted to the control system, and the control system retrieves the historical data for comparison to confirm whether the sensor in the sampling module is a real fault; After the controller status monitoring module detects a controller failure, the control system shuts down and saves the data before and after the controller failure to disk; After the anti-condensation heating belt state monitoring module, the solenoid valve state monitoring module and the fan monitoring module detect the fault information, the corresponding operation data before and after the anti-condensation heating belt fault, the operation data before and after the solenoid valve fault and the operation data before and after the fan fault are transmitted to the control system, the control system confirms the uploaded data with the historical data, and outputs the fault judgment result, and triggers the fault response processing program at the same time, and the system makes corresponding processing in combination with the temperature and humidity and the execution module fault condition; The fault response processing program sets the corresponding weight ratio according to the anti-condensation effects of the three anti-condensation measures in the execution module, and combines the fault conditions of the anti-condensation measures and the current temperature and humidity conditions of the high and low temperature aging test chamber to determine whether to shut down or output a prompt alarm message without shutting down.

2. The anti-condensation control system for a chip high and low temperature aging test chamber according to claim 1 is characterized in that: The transformer converts the connected mains electricity into low voltage to supply power to the anti-condensation heating belt, the solenoid valve and the anti-condensation fan; A solid-state relay is also provided on the connection line between the anti-condensation heating belt and the transformer. The solid-state relay is connected to the output end of the control module and is used to control the operation of the anti-condensation heating belt.

3. The anti-condensation control system for a chip high and low temperature aging test chamber according to claim 1 is characterized in that: The sampling module also includes a gas flow sensor connected in series to the terminal pipeline of the solenoid valve, which is used to detect the flow rate of dry compressed air transmitted to the anti-condensation area; and a fan Hall sensor integrated in the anti-condensation fan stator to detect the fan speed; The dry compressed air flow rate, fan speed, temperature of the high and low temperature areas, temperature and humidity of the insulation area, and temperature and humidity of the normal temperature area collected by the sampling module are sent to the control module for data analysis, and the control module sends control instructions to the execution module.

4. The anti-condensation control system for a chip high and low temperature aging test chamber according to claim 1, characterized in that: The monitoring module is a separate controller, or the monitoring module is a monitoring subroutine embedded in the control module.

5. A chip high and low temperature aging test box anti-condensation control system fault detection method, characterized in that: The steps include: S1. After the high and low temperature test chamber is started, the sensor in the sampling module obtains the temperature and humidity data inside and outside the chamber in real time. After receiving the temperature and humidity data, the sensor monitoring module verifies its authenticity. When the data is abnormal, the control system analyzes and determines whether to enable the backup sensor or ignore the erroneous sensor data; S2. After the data is verified, the control module receives the temperature and humidity data transmitted by the sampling module, calculates the dew point in the insulation zone, and analyzes the dew point risk. The controller status monitoring module detects the controller status. When a controller failure is detected, the controller is immediately shut down and an alarm message is output. If no controller failure is detected, the controller selects an anti-condensation strategy based on the dew point risk and outputs a control signal to the execution module. S3. When the control signal is transmitted to the execution module, the anti-condensation heating belt state monitoring module, the solenoid valve state monitoring module and the fan monitoring module detect the heating belt, the solenoid valve and the fan; If there is no abnormality in the heating belt, the solenoid valve and the fan, the control module maintains the current output control signal to the next control cycle; If the heating belt, solenoid valve and fan are abnormal, the control system analyzes and determines whether the fault affects the operation. If it does not affect the operation, the control module prompts an alarm message and changes the control strategy, and changes the current output state to the next control cycle. If it affects the operation, it will stop immediately and output a prompt alarm message.

6. A chip high and low temperature aging test box anti-condensation control system fault detection method according to claim 5, characterized in that: In step S3, when the heating belt, solenoid valve and fan are abnormal and do not affect the operation, the control system changes the control strategy and adjusts the execution of the execution module according to the weight ratio of the three anti-condensation measures set in the execution module, combined with the failure of the anti-condensation measures and the current temperature and humidity of the high and low temperature aging test chamber.

Images