Self-adaptive temperature measuring device under complex working conditions

Abstract

The utility model relates to a self-adaptive temperature measuring device under complex working conditions. The technical problem that a traditional temperature measuring device with a single sensor cannot meet the measurement requirement is mainly solved. The technical scheme adopted by the utility model is as follows: the self-adaptive temperature measuring device under the complex working condition comprises a power supply module, a state sensing module, a central control module, a temperature sensor selection module and a temperature display module, the power supply module comprises a main power supply, a charging circuit, a standby power supply and a power supply switching circuit; the state sensing module comprises an on-site acquisition unit and an on-site judgment unit; the central control module comprises a microprocessor MCU and a clock circuit. The central control module is connected with the state sensing module, the temperature sensor selection module, the temperature display module and the power supply module; the temperature sensor selection module comprises a sensor unit, a selection unit and an A / D conversion unit. The temperature display module comprises a display screen and an awakening unit.

Description

Technical Field

[0001] The utility model belongs to the technical field of monitoring equipment, and in particular relates to an adaptive temperature measuring device under complex working conditions. Background Art

[0002] With the continuous development of my country's power technology, the demand for power grid automation is becoming increasingly urgent. Due to the unique process conditions and environmental challenges faced by the process, the main power generation equipment, operation and maintenance equipment, monitoring equipment and other auxiliary facilities all need temperature measurement devices to monitor the system operation data and ensure the normal operation of the power generation project. However, the operating conditions of power plants are changeable, the operations are frequent and complex, and the traditional temperature measurement devices have a fixed measurement mode and a single sampling strategy, which cannot meet the requirements of economic and safe operation of power plants. For example, during the start-up and shutdown phase of the unit, from cold start to full load, the operating conditions are constantly changing, and the temperature ranges from tens of degrees to hundreds of degrees. The traditional single-range temperature measurement device cannot meet the measurement requirements, and during the turbine speed-up phase, a high-sampling-frequency temperature sensor is required to closely monitor the temperature changes. In the load maintenance phase, a low-sampling-rate temperature sensor can meet the temperature measurement requirements, which can reduce energy consumption. The traditional single-sensor temperature measurement device cannot meet the measurement requirements. In order to ensure the safety of the startup equipment, it is necessary to complete the temperature measurement by switching the equipment, and the switching process will cause data loss, resulting in inaccurate measurement results. In view of the above problems, an adaptive temperature measurement device under complex working conditions is proposed. This device automatically switches between a high sampling rate temperature sensor in a low temperature range and a low sampling rate temperature sensor in a high temperature range by sensing different working conditions, so as to meet the temperature measurement requirements under complex working conditions and ensure the accuracy of the temperature measurement data. At the same time, users do not need to change the equipment under different working conditions, which is more convenient to use and further improves the practicality of the equipment. Summary of the invention

[0003] The purpose of the utility model is to solve the above technical problems and provide an adaptive temperature measuring device under complex working conditions which can automatically switch appropriate temperature sensors to measure temperature and obtain accurate temperature parameters under different working conditions.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] An adaptive temperature measurement device under complex working conditions, comprising a power supply module, a state sensing module, a central control module, a temperature sensor selection module and a temperature display module;

[0006] The power module includes a main power supply, a charging circuit, a backup power supply and a power switching circuit. The power module is connected to a state sensing module, a central control module, a temperature sensor selection module and a temperature display module. When the circuit is powered on, the main power supply is first used for power supply. When the power of the main power supply is within the set low power threshold, it will be switched to the backup power supply. At this time, the main power supply is connected to the charging circuit to charge the main power supply. When charging is completed, the charging circuit is automatically disconnected and the backup power supply is switched back to the main power supply. The power switching circuit switches between the main power supply and the backup power supply, which can better power the system.

[0007] The state sensing module includes a field acquisition unit and a field determination unit, and the state sensing module is connected to the central control module and the power supply module; the field acquisition unit acquires real-time temperature change data of the surrounding environment, and transmits the acquired real-time temperature change data to the field determination unit, and the field determination unit identifies the working condition according to the real-time temperature change data to form a working condition determination signal;

[0008] The central control module includes a microprocessor MCU and a clock circuit; the central control module is connected to a state sensing module, a temperature sensor selection module, a temperature display module and a power module; the central control module is responsible for receiving a working condition determination signal sent by the state sensing module, and determining whether the current temperature sensor is suitable for the current working condition according to the corresponding working condition determination signal. If not suitable, the central control module selects a suitable temperature sensor according to the current working condition, and sends a signal to the selection unit to switch to a suitable temperature sensor;

[0009] The temperature sensor selection module includes a sensor unit, a selection unit and an A / D conversion unit. The temperature sensor selection module is connected to the central control module and the power module. The temperature sensor selection module is responsible for executing the switching instructions of the central control module. The sensor unit is composed of a low-temperature range high-sampling rate temperature sensor and a high-temperature range low-sampling rate temperature sensor, which is responsible for collecting the on-site temperature to ensure stable use under different working conditions and ensure the accuracy and reliability of the temperature measurement data. After the sensor unit measures the on-site temperature, it sends a signal to the central control module, which is processed by the central control module and displays the current temperature through the temperature display module.

[0010] The temperature display module includes a display screen and a wake-up unit, and the temperature display module includes connections with a central control module and a power supply module; the temperature display module is responsible for receiving a temperature signal from the central controller and displaying the current ambient temperature in a timely manner.

[0011] Furthermore, the main power source is a lithium battery; the chip of the charging circuit is one of MPM3596 and AP05N10.

[0012] Furthermore, the chip of the central control module is selected from any one of Xilinx FPGA Artix7 series chips, ST's STM32F1 series chips, UK ARM's ARM7, ARM9 series, TI's DSP TMS320 series chips or Intel's 51 single-chip microcomputer.

[0013] Furthermore, the temperature sensor is any one of DS18B20, LM75, LM70 or TMP102.

[0014] Furthermore, the display screen is selected from any one of a liquid crystal display and a touch panel.

[0015] The beneficial effects of the utility model are:

[0016] The utility model adopts a temperature sensor with a high sampling rate in a low temperature range and a temperature sensor with a low sampling rate in a high temperature range. The state sensing module senses the current working condition, identifies the working condition according to the current temperature change rate, and forms a working condition judgment. The central control module selects the corresponding temperature sensor for temperature measurement according to the current working condition judgment, obtains an accurate temperature measurement value, and makes the temperature measurement process more efficient and accurate. The technical problem that the traditional single sensor cannot meet the measurement requirements is solved. Compared with the background technology, the utility model has the advantages of sensing different working conditions, automatically switching the appropriate temperature sensor, obtaining an accurate temperature measurement value, and realizing adaptive temperature measurement under complex working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0018] The utility model is described in detail below with reference to the accompanying drawings and embodiments.

[0019] like Figure 1 As shown, an adaptive temperature measurement device under complex working conditions in this embodiment includes a power supply module, a state sensing module, a central control module, a temperature sensor selection module and a temperature display module;

[0020] The power module includes a main power supply, a charging circuit, a backup power supply and a power switching circuit. The power module is connected to a state sensing module, a central control module, a temperature sensor selection module and a temperature display module. When the circuit is powered on, the main power supply is first used for power supply. When the power of the main power supply is within the set low power threshold, it will be switched to the backup power supply. At this time, the main power supply is connected to the charging circuit to charge the main power supply. When charging is completed, the charging circuit is automatically disconnected and the backup power supply is switched back to the main power supply. The power switching circuit switches between the main power supply and the backup power supply, which can better power the system.

[0021] The main power source is a lithium battery; the charging circuit chip is one of MPM3596 and AP05N10. MPM3596 has the advantages of low noise, small size and high performance. AP05N10 has high conversion rate, stable output voltage, low power consumption and wide application range.

[0022] The state sensing module includes a field acquisition unit and a field determination unit, and the state sensing module is connected to the central control module and the power supply module; the field acquisition unit acquires real-time temperature change data of the surrounding environment, and transmits the acquired real-time temperature change data to the field determination unit, and the field determination unit identifies the working condition according to the real-time temperature change data to form a working condition determination signal;

[0023] The central control module includes a microprocessor MCU and a clock circuit; the central control module is connected to a state sensing module, a temperature sensor selection module, a temperature display module and a power module; the central control module is responsible for receiving a working condition determination signal sent by the state sensing module, and determining whether the current temperature sensor is suitable for the current working condition according to the corresponding working condition determination signal. If not suitable, the central control module selects a suitable temperature sensor according to the current working condition, and sends a signal to the selection unit to switch to a suitable temperature sensor;

[0024] The chip of the central control module is selected from any one of Xilinx FPGA Artix7 series chips, ST's STM32F1 series chips, British ARM's ARM7, ARM9 series, TI's DSP TMS320 series chips or Intel's 51 single-chip microcomputers. Among them, FPGA's Artix7 series chips are characterized by low power consumption and low cost, which can meet the low power consumption and high performance requirements of the device. The STM32F1 series has rich peripherals and good computing power, which can meet the computing and control requirements of the device. The TMS320 series chips integrate peripheral modules such as flash memory and high-speed A / D converters, which can meet the high-speed, real-time and digital requirements of the device. Among the 51 single-chip microcomputers, AT89C51 has the basic characteristics of the 51 series single-chip microcomputers, low power consumption, high performance, and rich peripheral resources, and is widely used in industrial control, instrumentation and other fields.

[0025] The temperature sensor selection module includes a sensor unit, a selection unit and an A / D conversion unit. The temperature sensor selection module is connected to the central control module and the power module. The temperature sensor selection module is responsible for executing the switching instructions of the central control module. The sensor unit is composed of a low-temperature range high-sampling rate temperature sensor and a high-temperature range low-sampling rate temperature sensor, which is responsible for collecting the on-site temperature to ensure stable use under different working conditions and ensure the accuracy and reliability of the temperature measurement data. After the sensor unit measures the on-site temperature, it sends a signal to the central control module, which is processed by the central control module and displays the current temperature through the temperature display module.

[0026] The temperature sensor is any one of DS18B20, LM75, LM70 or TMP102. DS18B20 has the advantages of miniaturization, low power consumption, high performance, strong anti-interference ability, easy matching with microprocessor, etc., and can directly convert temperature into digital signal processing; LM70 and TMP102 are both low power devices, and the power consumption is less than 1 mA when in power-off state.

[0027] The temperature display module includes a display screen and a wake-up unit, and the temperature display module includes connections with a central control module and a power supply module; the temperature display module is responsible for receiving a temperature signal from the central controller and displaying the current ambient temperature in a timely manner.

[0028] The display screen can be any one of a liquid crystal display or a touch panel. The liquid crystal display (LCD) and the touch panel (TP) can be selected from models such as ST7735S and ST7789T3, which have high resolution, high brightness, and low power consumption, can extend battery life without sacrificing display quality, and support touch screen control.

[0029] The above specific embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the following description, and these obvious changes or modifications based on the spirit of the present invention are still within the scope of protection of the present invention.

Claims

1. An adaptive temperature measurement device under complex working conditions, characterized in that: It includes a power module, a state sensing module, a central control module, a temperature sensor selection module and a temperature display module; The power module includes a main power supply, a charging circuit, a backup power supply and a power switching circuit, and the power module is connected to a state sensing module, a central control module, a temperature sensor selection module and a temperature display module; The state perception module includes a field acquisition unit and a field determination unit, and the state perception module is connected to the central control module and the power supply module; The central control module includes a microprocessor MCU and a clock circuit; the central control module is connected to a state sensing module, a temperature sensor selection module, a temperature display module and a power supply module; The temperature sensor selection module includes a sensor unit, a selection unit and an A / D conversion unit. The temperature sensor selection module is connected to the central control module and the power module. The temperature sensor selection module is responsible for executing the switching instructions of the central control module. The sensor unit is composed of a low-temperature range high-sampling rate temperature sensor and a high-temperature range low-sampling rate temperature sensor, which is responsible for collecting the on-site temperature. The temperature display module includes a display screen and a wake-up unit, and the temperature display module includes connections with a central control module and a power supply module; the temperature display module is responsible for receiving a temperature signal from the central controller and displaying the current ambient temperature in a timely manner.

2. The adaptive temperature measurement device under complex working conditions according to claim 1, characterized in that: The main power source is a lithium battery; the chip of the charging circuit is MPM3596 or AP05N10.

3. The adaptive temperature measurement device under complex working conditions according to claim 1, characterized in that: The chip of the central control module is selected from any one of Xilinx FPGA Artix7 series chips, ST STM32F1 series chips, British ARM ARM ARM7, ARM9 series chips, TI DSP TMS320 series chips or Intel 51 single chip microcomputer.

4. The adaptive temperature measurement device under complex working conditions according to claim 1, characterized in that: The temperature sensor is any one of DS18B20, LM75, LM70 or TMP102.

5. The adaptive temperature measurement device under complex working conditions according to claim 1, characterized in that: The display screen is selected from any one of a liquid crystal display and a touch panel.

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