CN106428109B - Axle temperature display and alarm device for locomotive based on single-chip microcomputer - Google Patents

Abstract

The invention discloses a locomotive axle temperature display and alarm device based on a single-chip microcomputer, and an information collection device, which is arranged on the locomotive to collect the original data of the bearing temperature on the locomotive; the single-chip microcomputer is connected with the information collection device, and is used to receive and process information from Collect the raw data of the bearing temperature of the device and output the control signal; the infrared thermal imager is installed on the locomotive to collect the infrared image of the bearing on the locomotive and transmit it to the single-chip microcomputer; the data display alarm device is set in the cab and connected with the single-chip microcomputer , used to receive the control signal from the single chip microcomputer and display the temperature parameters and infrared image of the bearing, and alarm when the temperature parameter exceeds the normal temperature. The present invention monitors and displays the shaft temperature in real time, and immediately reports to the police when a problem occurs, thereby ensuring the driving safety of the train.

Description

Axle temperature display and alarm device for locomotive based on single-chip microcomputer

technical field

The invention relates to a temperature detection system, in particular to a locomotive axle temperature display and alarm device based on a single-chip microcomputer.

Background technique

When the locomotive is running at high speed, the bearings will heat up due to friction. Real-time monitoring of the locomotive shaft temperature and real-time and accurate display of the shaft temperature is an important issue. In this way, problems can be found, and the alarm will be called immediately so that the staff can take timely measures to ensure the safety of the train. driving safety.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a locomotive shaft temperature display and alarm device based on a single-chip microcomputer, which can monitor and display the shaft temperature in real time, and immediately alarm when a problem occurs, so as to ensure the safety of the train.

In order to solve the above technical problems, the present invention takes the following technical solutions:

A single-chip microcomputer-based locomotive axle temperature display and alarm device, including

The information collection device is installed on the locomotive to collect the original data of the bearing temperature on the locomotive;

The single-chip microcomputer is connected with the information collection device, and is used for receiving and processing the raw data of the bearing temperature from the information collection device, and outputting a control signal;

Infrared thermal imager, installed on the locomotive to collect the infrared image of the bearing on the locomotive and send it to the single-chip microcomputer;

The data display alarm device is installed in the cab and connected with the single-chip microcomputer, used to receive the control signal from the single-chip microcomputer and display the temperature parameters and infrared images of the bearings, and alarm when the temperature parameters exceed the normal temperature.

Preferably, the information collection device includes a temperature sensor.

Preferably, the information collection device is connected to the single-chip microcomputer through an electronic switch and a cable.

Further preferably, the electronic switch is controlled by a wireless remote controller.

Preferably, the data display and alarm device includes temperature display digital tubes and LED bicolor lights.

Preferably, the single-chip computer is connected with a data storage unit.

Due to the implementation of the above technical solutions, the present invention has the following advantages compared with the prior art:

The device of the invention monitors the axle temperature of the locomotive in real time, accurately displays it, and when a problem is found, it immediately reports to the police to allow staff to take measures in time, thereby ensuring the running safety of the train.

Description of drawings

Fig. 1 is a structural framework schematic diagram of the present invention;

Fig. 2 is the wiring diagram of the data display alarm device of the present invention;

Among them: 1. Single-chip microcomputer; 2. Data display alarm device; 3. Cable interface; 4. Electronic switch; 5. Wireless remote control; 6. Temperature sensor; 7. Infrared thermal imager.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in accompanying drawing 1, a kind of locomotive shaft temperature display alarm device based on single-chip microcomputer of the present invention, information collection device, is arranged on the locomotive and is used for collecting the raw data of bearing temperature on the locomotive; Single-chip microcomputer 1 is connected with information collection device, uses To receive and process the raw data of the bearing temperature from the information collection device, and output the control signal; the infrared thermal imager 7 is set on the locomotive to collect the infrared image of the bearing on the locomotive and transmit it to the single-chip microcomputer 1; the data display alarm device, It is installed in the cab and connected to the single-chip microcomputer 1, and is used to receive the control signal from the single-chip microcomputer 1 and display the temperature parameters and infrared images of the bearings, and alarm when the temperature parameters exceed the normal temperature.

The information collection device includes a temperature sensor 6, which is connected to the single-chip microcomputer 1 through a multi-channel electronic switch 4 and a cable interface 3, and the electronic switch 4 is controlled by a wireless remote controller 5. In this embodiment, since a locomotive generally has eight wheels, eight temperature sensors 6 are provided. The temperature sensor 6 is DS18B20, which has a ground terminal, a digital signal output terminal and a power input terminal. The power supply voltage of DS18B20 is 3.0 to 5.5 volts, and the temperature measurement range is -55 to 125 degrees Celsius. It supports multi-point networking. Multiple DS18B20 can Connected in parallel on a single bus to achieve multi-point temperature measurement. The DS18B20 sensor is an integrated digital temperature sensor, which can directly read the measured temperature, and can convert the temperature value into 9-bit and 12-bit digital quantities within 93.75 ms and 750 ms respectively, so the use of DS18B20 can make the system structure simpler, The reliability is higher, and the power consumption of the chip is very small at the same time, generally no additional power supply is needed. The digital signal output by the temperature sensor 6 can be directly connected to the I/O of the single-chip microcomputer, which makes the connection very convenient. Because the digital signal is transmitted on the single bus, this makes the system have good anti-interference performance, high reliability and long transmission distance.

In this embodiment, the MCS-51 series rewritable AT89C55WD single-chip microcomputer is used for control. The single-chip microcomputer completes the selection control of the cable interface, and displays the temperature parameters of each axis according to the digital quantity input by the DS18B20 sensor according to the program command. It displays green within the normal temperature range, and displays red when the temperature exceeds the normal temperature. The AT89C55WD double single-chip working mode is adopted mainly to solve the problem of the required control pins and improve the data processing capability and speed.

The data display alarm device 2 includes a temperature display digital tube and an LED two-color light. The temperature display digital tube displays the shaft temperature, and the LED two-color light displays the state. It displays green within the normal temperature range and red alarm when it exceeds the normal range. In this embodiment, the display includes two CH452 chips, and the connection of CH452 is shown in Figure 2. The display of the digital tube temperature and the status display of the LED are independent of each other, so two CH452s are connected in parallel with the single-chip microcomputer. One piece can dynamically drive 8 common cathode digital tubes, the same segment pins (segment A ~ segment G and decimal point) of all digital tubes are connected in parallel and then connected to the segment drive pin SEG0 of CH452 through the serial current limiting resistor R1 (or R12) ~SEG7, the cathodes of each nixie tube are respectively driven by the DIG0~DIG7 pins of CH452. The larger the resistance value of the series current limiting resistor is, the smaller the segment drive current is, and the lower the display brightness of the digital tube is, the resistance value of R1 (or R12) is generally between 100Ω and 1KΩ, and it should be given priority under the same conditions. Choose a larger resistance value to reduce the power consumption of the CH452 chip itself; another chip is used to drive the LED bi-color light.

In this embodiment, the single-chip microcomputer 1 is connected with a data storage unit, and temperature parameters are stored in the data storage unit for future maintenance and testing.

The present invention has been described in detail above, but the present invention is not limited to the above-mentioned embodiments. All equivalent changes or modifications made according to the spirit of the present invention shall fall within the protection scope of the present invention.

Claims (2)

1. A locomotive shaft temperature display alarm device based on a single-chip microcomputer, characterized in that, comprising: Information collection device, the information collection device includes a plurality of DS18B20 temperature sensors, the DS18B20 temperature sensors are set on the locomotive, used to collect the original data of the wheel bearing temperature on the locomotive, each DS18B20 temperature sensor corresponds to a wheel, each DS18B20 temperature The sensors are respectively connected to the multi-channel electronic switch (4), connected to the cable interface (3) through the multi-channel electronic switch (4), and then connected to the single-chip microcomputer through the cable interface (3), using the multi-point group of DS18B20 temperature sensor Network function, connect multiple DS18B20 temperature sensors in parallel on a single bus to achieve multi-point temperature measurement; the electronic switch is controlled by a wireless remote controller; The single-chip microcomputer is connected with the information collection device, adopts rewritable AT89C55WD double single-chip microcomputers, is used to receive and process the bearing temperature raw data from the information collection device, and output control signals; Infrared thermal imaging camera is arranged on the locomotive to collect the infrared images of the bearings on the locomotive and transmit them to the single-chip microcomputer; The data display alarm device is installed in the cab and connected to the single-chip microcomputer, and is used to receive the control signal from the single-chip microcomputer and display the temperature parameters and infrared images of the bearing, and when the temperature parameter exceeds the normal temperature, it will give an alarm. The data display The alarm device includes temperature display digital tubes and LED dual-color lights that are independently controlled from each other. The single-chip microcomputer drives the temperature display digital tube through a piece of CH452 chip connected to the temperature display digital tube, and the series connection between the CH452 chip and the temperature display digital tube is limited. The resistance value of the current-limiting resistor is between 100Ω and 1KΩ; the single-chip microcomputer is connected to the LED bi-color lamp through another CH452 chip to drive the LED bi-color lamp. 2. The locomotive axle temperature display and alarm device based on a single-chip microcomputer according to claim 1, characterized in that: said single-chip microcomputer is connected with a data storage unit.