Mobile phone temperature on-line monitoring system

Abstract

The utility model provides a mobile phone temperature on-line monitoring system in order to solve the problems that the temperature of a mobile phone cannot be monitored in real time, external equipment cannot be timely notified to take measures when the temperature is abnormal, and the mobile phone can be automatically restarted when the current is abnormal in the prior art. The system comprises a plurality of temperature sensors, a microcontroller, a relay, a USB to serial port chip, a sampling resistor, a current detection chip and an LED. According to the system, a plurality of temperature sensors are arranged at key parts such as a mobile phone processor, a battery, a mainboard and a shell, and are connected with a microcontroller through an SPI (Serial Peripheral Interface) bus, so that the temperature of the mobile phone is accurately monitored in real time. When the temperature is abnormal, the DSP chip transmits an abnormal signal and detailed temperature data to a PC (Personal Computer) by virtue of the USB to serial port chip, so that the problem that external equipment cannot be notified in time is solved; the sampling resistor is connected in series in the power line of the USB bus, the sampling resistor is matched with the INA128 chip to monitor the current, and once the current is abnormal, the DSP chip can restart the mobile phone by controlling the relay.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mobile phone monitoring technical field especially relates to a mobile phone temperature on -line monitoring system. BACKGROUND

[0002] With the continuous improvement of the safety and stability requirements of mobile phones, it is necessary to monitor the temperature of the mobile phone in real time during testing, and to notify external devices to take measures in time when the temperature is abnormal, such as notifying the PC to cut off the USB port power supply, and automatically restarting the mobile phone when the current is abnormal.

[0003] However, the existing technical means cannot realize these key functions, and it is difficult to effectively guarantee the safe operation of the mobile phone. UTILITY MODEL CONTENTS

[0004] The utility model discloses to solve the problem that the temperature of mobile phone cannot be monitored in real time in the prior art, and the mobile phone is automatically restarted when the current is abnormal, and provides a mobile phone temperature on -line monitoring system.

[0005] The utility model adopts the technical scheme that:

[0006] The utility model discloses a mobile phone temperature on -line monitoring system, which comprises:

[0007] A plurality of temperature sensors are installed on the mobile phone processor, the battery, the mainboard and the shell respectively.

[0008] A microcontroller is connected with the plurality of temperature sensors through a data transmission line.

[0009] A relay.

[0010] A USB-to-serial chip is arranged on the mobile phone mainboard. The USB interface of the USB-to-serial chip is connected with the PC through a USB bus, and is used for realizing the communication between the mobile phone and the PC. The power line of the USB bus is connected with the normally closed contact of the relay. When testing the mobile phone, the mobile phone battery is taken out, and the USB power supply is changed, and a circuit for controlling the control coil of the relay is additionally arranged in the mobile phone. The circuit for controlling the control coil of the relay is connected with the control coil of the relay.

[0011] A sampling resistor is connected in series in the power line of the USB bus.

[0012] A current detection chip, IN+ and IN- pins of the current detection chip are connected to two ends of the sampling resistor respectively, the current detection chip calculates the current value flowing through the sampling resistor by measuring the voltage at two ends of the sampling resistor in combination with the resistance value of the sampling resistor; the current detection chip is connected with the microcontroller, and is used for transmitting the current value to the microcontroller.

[0013] Further, the temperature sensor is a digital temperature sensor DS18B20, because the measurement accuracy of the digital temperature sensor DS18B20 can reach ±0.5℃.

[0014] Further, the data transmission line adopts an SPI protocol, that is, the data transmission line is an SPI bus.

[0015] Further, the microcontroller is a DSP chip.

[0016] Further, the USB-to-serial chip is a CH340G chip.

[0017] Further, the current detection chip is an INA128 chip, and the INA128 chip is connected with the DSP chip through an I2C bus.

[0018] Further, the mobile phone temperature online monitoring system disclosed by the utility model further includes an LED, the LED is connected with the DSP chip, and is used for detecting the working state of the system.

[0019] The mobile phone temperature online monitoring system has the advantages that:

[0020] The mobile phone temperature online monitoring system disclosed by the utility model deploys multiple digital temperature sensors DS18B20 at key positions such as a mobile phone processor, a battery, a mainboard and a shell, and is connected with a DSP chip through an SPI bus, so that real-time and accurate monitoring of the temperature of the mobile phone is realized. When the temperature is abnormal, the DSP chip transmits abnormal signals and detailed temperature data to a PC through a USB-to-serial chip CH340G, so that the problem that external equipment cannot be notified in time is solved. In addition, a sampling resistor is connected in series in a USB bus power line, and an INA128 chip is used for monitoring current, so that the DSP chip can realize mobile phone restart through control of a relay once the current is abnormal. Meanwhile, the relay cuts off the power supply of the USB port when the temperature is abnormal, so that the safety of the equipment is guaranteed in all directions, and the safety and stability of the use of the mobile phone are greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0022] Figure 1 The scheme diagram of the mobile phone temperature online monitoring system. DETAILED DESCRIPTION

[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0024] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of a specific example are described below. Of course, they are only examples, and the purpose is not to limit the present application.

[0025] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0026] The mobile phone temperature online monitoring system disclosed in the embodiment comprises the following components: a plurality of temperature sensors, a microcontroller, a USB-to-serial chip, a sampling resistor, a relay, a current detection chip and an LED.

[0027] In the embodiment, the temperature sensor is a digital temperature sensor DS18B20, the measurement accuracy of the digital temperature sensor DS18B20 can reach ±0.5℃, and the digital temperature sensor DS18B20 communicates with the microcontroller through a single bus, which is convenient for data transmission.

[0028] In the embodiment, the microcontroller is a DSP chip, because the DSP chip can be used for subsequent function upgrade, and the development efficiency of the DSP chip is higher than that of the FPGA, and the performance of the DSP chip is stronger than that of the MCU.

[0029] In the embodiment, the USB-to-serial chip is a CH340G chip.

[0030] In this embodiment, the current detection chip is selected as INA128 chip, because INA128 chip has high measurement accuracy, can measure current, voltage and power at the same time, is convenient for function expansion, and can communicate with the DSP chip through I2C interface.

[0031] The following will be described in detail in combination with the accompanying drawings Figure 1 The connection mode of each component in the mobile phone temperature online monitoring system disclosed in this embodiment is described in detail as follows.

[0032] A plurality of digital temperature sensors DS18B20 are respectively installed on the mobile phone processor, battery, mainboard and shell; the DSP chip is connected with the plurality of digital temperature sensors DS18B20 through SPI bus as a data transmission line; the CH340G chip is arranged on the mobile phone mainboard; the USB interface of the CH340G chip is connected with the PC through USB bus, wherein the power line of the USB bus (the USB bus includes one power line, two data lines and one GND line) is connected with the normally closed contact of the relay (it should be noted that the mobile phone temperature online monitoring system removes the mobile phone battery when testing the mobile phone, and changes to USB power supply, and a circuit for controlling the control coil of the relay is additionally arranged in the mobile phone; the circuit for controlling the control coil of the relay is connected with the control coil of the relay.), the control coil of the relay is connected with the circuit for controlling the control coil of the relay in the mobile phone; the sampling resistor is connected in series in the power line of the USB bus; the IN+ and IN- pins of the INA128 chip are respectively connected to both ends of the sampling resistor, and the INA128 chip is connected with the DSP chip through I2C bus; the LED is connected with the DSP chip, and is used for detecting the working state of the system.

[0033] The functions and principles of the mobile phone temperature online monitoring system disclosed in this embodiment are described as follows.

[0034] The mobile phone temperature online monitoring system disclosed in this embodiment can collect and transmit data, and the principle is as follows: the temperature data collected by the plurality of digital temperature sensors DS18B20 is summarized to the DSP chip through SPI bus. The DSP chip is the core of the whole monitoring system, and is responsible for collecting, processing and analyzing the sensor data. In the DSP chip, the collected temperature data is preliminarily processed and calibrated to remove possible noise and errors.

[0035] The mobile phone temperature online monitoring system disclosed in this embodiment can communicate with the PC and control the USB port power-off, and specifically includes communication interface setting, temperature abnormality judgment and notification, and USB port power-off control. The following will be described respectively.

[0036] Communication interface setting

[0037] In order to realize the communication between the mobile phone and the PC, a special communication interface is arranged on the mainboard of the mobile phone. In the embodiment, a USB-to-serial chip CH340G is used to convert the serial communication signal inside the mobile phone into a USB signal so as to be connected with the PC. Through the interface, the mobile phone can send the real-time temperature data and other related state information to the PC. Meanwhile, the PC can also send control instructions to the mobile phone through the interface.

[0038] Temperature anomaly judgment and notification

[0039] In the DSP chip, the normal temperature range value is set in advance. When the temperature data received by the DSP chip exceeds the preset range, it is determined that the temperature is abnormal. At this time, the DSP chip sends a temperature anomaly notification signal to the PC through the communication interface, and also sends the detailed temperature data. After receiving the notification, the PC prompts through a specific software program, such as popping up a warning window, to inform the operator of the mobile phone temperature anomaly.

[0040] USB port power-off control

[0041] After receiving the temperature anomaly notification, the PC sends a power-off control instruction to the mobile phone through the USB interface connected with the mobile phone. The circuit for controlling the control coil of the relay inside the mobile phone receives the instruction and quickly cuts off the power supply of the USB port of the corresponding mobile phone through the control elements such as the relay or the electronic switch. When receiving the power-off instruction, the control coil of the relay is energized, so that the normally closed contact is disconnected, thereby cutting off the power supply of the USB port, preventing damage to the PC and other connected devices caused by overheating of the mobile phone.

[0042] The mobile phone temperature online monitoring system disclosed in the embodiment can perform current anomaly detection and mobile phone restart, which specifically includes a current monitoring circuit and an anomaly judgment and restart control. The following will be described respectively:

[0043] Current monitoring circuit

[0044] In the power supply circuit of the USB, a precision sampling resistor is connected in series, and the IN+ and IN- pins of the INA128 chip are connected to the two ends of the sampling resistor, respectively. The INA128 chip calculates the current value flowing through the sampling resistor by measuring the voltage at the two ends of the sampling resistor and combining the resistance value of the sampling resistor. The current value is transmitted to the DSP chip through the I2C bus.

[0045] Anomaly judgment and restart control

[0046] In the DSP chip, the normal current range value is also preset. When the detected current value exceeds the range, it is determined that the current is abnormal. After the DSP chip judges that the current is abnormal, it immediately triggers the restart mechanism of the mobile phone. By controlling the control coil of the relay connected to the USB bus power line, the mobile phone can be reliably reset.

[0047] In summary, the mobile phone temperature online monitoring system disclosed in the embodiment realizes real-time and accurate monitoring of the temperature of the mobile phone by deploying multiple digital temperature sensors DS18B20 with a measurement accuracy of ±0.5℃ at key positions such as the mobile phone processor, battery, mainboard and shell, and connecting them to the DSP chip using the SPI bus. When the temperature is abnormal, the DSP chip transmits the abnormal signal and detailed temperature data to the PC through the USB-to-serial chip CH340G, solving the problem of being unable to timely notify external devices. In addition, a sampling resistor is connected in series in the USB bus power line, and the INA128 chip is used to monitor the current. Once the current is abnormal, the DSP chip can control the relay to restart the mobile phone. At the same time, the relay cuts off the USB port power when the temperature is abnormal, providing all-round protection for the safety of the device and greatly improving the safety and stability of the mobile phone.

Claims

1. A handset temperature on-line monitoring system, characterized in that, The application relates to a temperature monitoring system for mobile phones, which comprises the following parts: a plurality of temperature sensors, which are respectively installed on a mobile phone processor, a battery, a mainboard and a shell; a microcontroller, which is connected with the temperature sensors through a data transmission line; the microcontroller is used for collecting, processing and analyzing the temperature sensor data; a relay; a USB-to-serial chip, which is arranged on the mobile phone mainboard; a USB interface of the USB-to-serial chip is connected with a PC through a USB bus, and is used for realizing communication between the mobile phone and the PC; wherein a normally closed contact of the relay is connected in a power line of the USB bus, and a control coil of the relay is connected with a circuit for controlling the control coil of the relay in the mobile phone; a sampling resistor, which is connected in series in the power line of the USB bus; a current detection chip, IN+ and IN- pins of which are respectively connected to two ends of the sampling resistor; the current detection chip calculates a current value flowing through the sampling resistor by measuring voltages at the two ends of the sampling resistor and combining a resistance value of the sampling resistor; the current detection chip is connected with the microcontroller, and is used for transmitting the current value into the microcontroller.

2. The on-line monitoring system for handset temperature according to claim 1, characterized in that, The temperature sensor is a digital temperature sensor DS18B20, because the measurement accuracy of the digital temperature sensor DS18B20 can reach + / -0.5 DEG C.

3. The on-line monitoring system for handset temperature according to claim 1, characterized in that, The data transmission line is an SPI bus.

4. The on-line monitoring system for handset temperature according to claim 1, characterized in that, The microcontroller is a DSP chip.

5. The on-line monitoring system for handset temperature according to claim 1, wherein, The USB-to-serial chip is a CH340G chip.

6. The on-line handset temperature monitoring system of claim 4, wherein, The current detection chip is an INA128 chip, which is connected with the DSP chip through an I2C bus.

7. The on-line monitoring system for cell temperature according to any one of claims 1-6, wherein, The system further comprises an LED, which is connected with the DSP chip, and is used for detecting a system working state.

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