WO2013067816A1

WO2013067816A1 - Wireless temperature monitoring system

Info

Publication number: WO2013067816A1
Application number: PCT/CN2012/077156
Authority: WO
Inventors: 张中
Original assignee: 中国北车集团大同电力机车有限责任公司
Priority date: 2011-11-07
Filing date: 2012-06-19
Publication date: 2013-05-16
Also published as: CN103093596A

Abstract

A wireless temperature monitoring system, comprising: a transmitting terminal (1) for monitoring the first temperature of a monitored point and transmitting the first temperature data to a receiving terminal (3); an ambient temperature monitoring terminal (2) for monitoring the second temperature, i.e. the temperature of the environment the monitored point is in, and transmitting the second temperature data to the receiving terminal (3); a receiving terminal (3) for calculating the temperature rise of the monitored point relative to the environment according to the first temperature and the second temperature and triggering an alarm if the temperature rise is greater than a preset threshold; the transmitting terminal (1) is wirelessly connected with the receiving terminal (3); and the ambient temperature monitoring terminal (2) is wired to the receiving terminal (3). With coordination among the transmitting terminal, the environment temperature monitoring terminal and the receiving terminal, the system triggers an alarm to alert the workers to deal with the malfunction when the temperature rise of a certain electric device or line in the circuit of an electric locomotive or an electric motor vehicle exceeds the threshold, thus preventing the electric device or line from being burnt out due to prolonged overheating, preventing the accident from worsening, therefore ensuring the safety and reliability of the electric locomotive or the electric motor vehicle.

Description

Wireless temperature monitoring system

TECHNICAL FIELD The present invention relates to monitoring technology, and more particularly to a wireless temperature monitoring system. Background technique

With the advancement of rail transit equipment technology and the continuous updating of products, railway management departments and users have put forward higher requirements for the safety and reliability of online operation of electric locomotives or electric vehicles, among which 25kV high-voltage electrical appliances and circuits The reliability index is higher, because once this part fails, the lighter causes the machine to break, and the heavy one causes the contact network to break, affecting the operation of other vehicles on this line, and the maintenance and rescue is difficult and time-consuming. It is especially important to ensure the stability and reliability of the operation of 25kV high voltage circuits or high voltage electrical appliances for electric locomotives or electric vehicles.

At present, in various types of electric locomotives or electric vehicles running in or on the line, if the contact resistance of the connection part becomes large, the insulation of the insulation end is lowered, etc., the temperature overheating of the 25kV high-voltage electrical appliances and circuits is not known. Therefore, the electrical appliance and the circuit may be burnt due to overheating, resulting in an accident. Summary of the invention

The invention provides a wireless temperature monitoring system.

The system includes:

a transmitting end, configured to monitor a first temperature of the monitored point, and send the first temperature data to the receiving end;

The ambient temperature monitoring end is configured to monitor a second temperature of the environment in which the monitored point is located, and send the second temperature data to the receiving end;

The receiving end is configured to calculate a temperature rise of the monitored point relative to the environment according to the first temperature and the second temperature, and if the temperature rise is greater than a preset threshold, issue an alarm;

The transmitting end and the receiving end are connected by using a wireless manner, and the ambient temperature monitoring end is connected to the receiving end by a wired manner. The technical effect of the invention is: through the cooperation of the transmitting end, the ambient temperature monitoring end and the receiving end, when the temperature rise of an electric appliance or line in the electric locomotive or the electric vehicle group exceeds the threshold, an alarm is issued to remind the staff to handle Failure, to avoid the burning of a certain electrical appliance or line due to overheating for a long time, resulting in the expansion of accidents, achieving the safety and reliability of electric locomotives or electric vehicles. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a structural diagram of a wireless temperature monitoring system of the present invention;

2 is a structural diagram of a transmitting end of the present invention;

3 is a structural diagram of a receiving end of the present invention;

Figures 4, 5, 6, and 7 are schematic diagrams of the temperature display, the over-temperature threshold setting screen, the historical over-temperature point recording screen, and the system parameter setting screen. 1 is a structural diagram of a wireless temperature monitoring system according to the present invention. As shown in FIG. 1, the system includes a transmitting end 1, an ambient temperature monitoring end 2, and a receiving end 3.

The transmitting end 1 is configured to monitor the first temperature of the monitored point, and send the first temperature data to the receiving end 3; the ambient temperature monitoring end 2 is configured to monitor the second temperature of the environment where the monitored point is located, and the second The temperature data is sent to the receiving end 3; the receiving end 3 is configured to calculate the temperature rise of the monitored point relative to the temperature of the environment according to the first temperature of the monitored point and the second temperature of the environment where the monitored point is located, if the temperature is When the rise is greater than the preset threshold, an alarm is issued; wherein, the transmitting end 1 and the receiving end 3 are connected by wireless, and the ambient temperature monitoring end 2 and the receiving end 3 are connected by wire.

The transmitting end 1 can be installed at different connection points of different electrical lines or different electrical components as needed. At this time, the number of the transmitting end 1 is plural, and of course, the number of the transmitting end 1 can also be one, by wireless transmission. The first temperature data of the monitored point monitored by the transmitting end 1 is transmitted to the receiving end 3. The ambient temperature monitoring terminal 2 realizes the monitoring of the ambient temperature around the monitored point, and transmits the ambient temperature data to the receiving end 3 through the wired transmission mode, and provides the basic data for the receiving end 3 to calculate the temperature rise of the monitored point relative to the ambient temperature. . After the receiving end 3 calculates the temperature rise, it judges the relationship with the preset threshold. If the temperature rise is greater than the threshold, it indicates that the temperature rise is too high, and if a fault occurs, an alarm is issued to remind the staff to handle the fault and avoid the electrical and circuit length. The time is overheated and burned, causing an accident. It can be seen from the above technical solution that the wireless temperature monitoring system of the present invention cooperates with the transmitting end, the ambient temperature monitoring end and the receiving end, when the temperature rise of an electric appliance or line in the circuit in the electric locomotive or the electric vehicle group exceeds the threshold value. An alarm is issued to remind the staff to deal with the fault, to avoid burning of an electrical appliance or line due to overheating for a long time, resulting in an accident, and achieving safety and reliability of the electric locomotive or electric vehicle.

2 is a structural diagram of a transmitting end of the present invention. As shown in FIG. 2, the transmitting end 1 includes a current transformer 11, a regulated power supply 12, a temperature sensor 13, a first processor 14, and a transmitting module 15.

a current transformer 11 for converting a current flowing through the monitored point into a voltage;

12, the voltage for outputting the current transformer 11 is converted into the operating voltage of the temperature sensor 13, the first processor 14 and the transmitting module 15, the temperature sensor 13 for monitoring the temperature of the monitored point, and transmitting the temperature data to The first processor 14 is configured to collect the temperature output by the temperature sensor 13 at a preset time interval, and send the temperature data to the transmitting module 15; the transmitting module 15 is configured to use the first processing The temperature data output from the device 14 is sent to the receiving terminal 3.

The current transformer 1 1 supplies the working power to the transmitting end 1. When a current flows in the circuit, the current is converted into a voltage by the principle of electromagnetic induction, and is output to the regulated power supply 12; the regulated power supply 12 converts the received voltage into a temperature. The operating voltage of the sensor 13, the first processor 14 and the transmitting module 15; the operating temperature of the temperature sensor 13, the first processor 14 and the transmitting module 15 used by the inventors of the present invention are both 3.3 V, and the current mutual inductance is used. The device 11 is a wound core current transformer.

The regulated power supply 12 used by the inventors of the present invention is composed of a rectifier module, a power control module, an electric protection module and a voltage stabilizing module; the temperature sensor 13 is a digital modular temperature sensor.

13 , The temperature range is -55 ^Q C-125 ^Q C, the measurement accuracy is not less than 0.5; The transmitting module 15 uses mature, reliable, stable and stable low-power products, the working frequency band is 2.4GHz, and the transmission rate is 1Mbps. The emission sensitivity is not less than ldb/m; the first processor 14 uses the MSP430 microcontroller; the transmitter 1 can withstand 200 degrees of temperature during normal operation.

The working process is described as follows: When a current flows through the current transformer 1 1 , the current transformer 11 converts the current into a voltage and outputs it to the regulated power supply 12 , and the regulated power supply 12 converts the received voltage into a temperature sensor 13 . The operating voltage of the first processor 14 and the transmitting module 15, the temperature sensor 13 outputs the monitored temperature data of the monitored point to the first processor 14, and the first processor 14 collects the temperature from the temperature at a preset time interval. Temperature data of sensor 13 and sent To the transmitting module 15, the transmitting module 15 transmits the temperature data to the receiving end by wireless transmission

3.

3 is a structural diagram of the receiving end 3 of the present invention. As shown in FIG. 3, the receiving end 3 includes: a voltage converting module 31, a receiving module 32, and a second processor 32.

The voltage conversion module 31 is configured to convert the voltage outputted by the battery on the locomotive to the operating voltage of the second processor 32 and the receiving module 32. The receiving module 32 is configured to receive the first temperature data output by the transmitting end 1 and output the same to the first a second processor 32, configured to calculate a temperature rise of the monitored point relative to the temperature of the environment according to the first temperature data from the receiving module 32 and the second temperature data from the ambient temperature monitoring terminal 2 If the temperature rise is greater than the preset threshold, an alarm is issued.

The working process of the receiving end 3 is as follows: The voltage converting module 31 converts the voltage outputted by the battery on the locomotive into the operating voltages of the second processor 32 and the receiving module 32; the receiving module 32 receives the first temperature data from the transmitting end 1, And outputting to the second processor 32; the second processor 32 receives the second temperature data from the ambient temperature monitoring terminal 2 by wired transmission, and calculates the monitored point relative to the location according to the first temperature data and the second temperature data. The temperature rise of the ambient temperature, if the temperature rise is greater than a preset threshold, an alarm is issued to remind the staff to troubleshoot.

The operating voltages of the receiving module 32 and the second processor 32 used by the inventors of the present invention are both 3.3V; the second processor 32 uses the SMT32 processor and is implemented by a program downloaded to the second processor 32. The first temperature data, the storage of the second temperature number, the temperature rise calculation, the second processor 32 includes a JTAG interface, and the online debugging of the wireless temperature monitoring system of the present invention can be implemented through the JTAG interface; the working frequency band of the receiving module 32 is At 2.4 GHz, the transmission rate is 1 Mbps.

Figures 4, 5, 6, and 7 are schematic diagrams of the temperature display, the over-temperature threshold setting screen, the historical over-temperature point recording screen, and the system parameter setting screen.

The receiving end 3 can also include a human-machine interaction screen, and the temperature and alarm information of the monitored point can be displayed through the human-machine interaction screen. The specific display interface is shown in FIG. 4 .

In Figure 4, the temperature display shows: channel, temperature of the channel, temperature rise of the channel relative to the ambient temperature, ambient temperature, alarm status light, historical over-temperature point recording screen button, over-temperature threshold setting screen Button, system parameter setting screen button and over temperature alarm confirmation button.

Specifically, the channel corresponds to the monitored point--the interface shown in FIG. 4 assumes that the system includes 10 monitored points, and the alarm status light is used to indicate the alarm status, the alarm status light and the channel one. A corresponding, may be, if a channel is in an alarm state, the alarm status light corresponding to the channel is displayed in red, and if the channel is not in an alarm state, the alarm status light corresponding to the channel is displayed in green; Click the record screen button, the over-temperature threshold setting screen button, the system parameter setting screen button is used to enter the corresponding interface respectively; the over-temperature alarm confirmation button is used for the staff to confirm the alarm state, confirm the alarm state and then perform the fault. Exclusion.

Through the program downloaded to the human-computer interaction screen, the human-computer interaction screen can also be used to record historical over-temperature points, set over-temperature thresholds, and set system parameters. The corresponding display interfaces are: over-temperature threshold setting screen, historical super Temperature point recording screen, system parameter setting screen.

As shown in Figure 5, the over-temperature threshold setting screen displays: current channel, channel, temperature rise of the channel, keyboard input, channel selection button and return button.

Specifically, the current channel refers to the channel for over-temperature threshold setting, the keyboard input is used to set the value of the over-temperature threshold, the channel selection button includes channel + and channel-, and the return button is used to return to the temperature display.

As shown in Figure 6, the over-temperature history point display screen includes: channel, temperature, return button and historical over-temperature point curve.

Specifically, for each channel, when there is an over-temperature alarm, the temperature of the channel is recorded, and the historical over-temperature point curve of the channel is formed according to these temperatures, and the return button is used to return to the temperature display screen.

As shown in Figure 7, the system parameter setting screen displays: backlight selection button, confirmation button and time setting button. The confirmation button is used to confirm the setting of the system parameters and enter the temperature display.

The second processor 32 of the receiving end 3 may further include an RS232 communication interface and a node output interface. The second processor 32 may transmit the calculated temperature rise data to the upper computer for further processing by the upper computer through the RS232 communication interface. The alarm of the speaker located in the staff workshop can be controlled through the node output interface, that is, if the second processor 32 determines that the temperature rise is greater than a preset threshold, the normally open contact connected to the speaker is closed, so that the speaker and the speaker The power is turned on, causing the speaker to sound an alarm to remind the staff to troubleshoot.

It should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art The technical solutions described in the foregoing embodiments can still be A modification of the line, or equivalent replacement of some or all of the technical features, and the modifications or substitutions do not depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

Claim

A wireless temperature monitoring system, comprising:

The transmitting end is connected to the receiving end by a wireless manner, and the ambient temperature monitoring end is connected to the receiving end by a wired manner.

2. The wireless temperature monitoring system according to claim 1, wherein the transmitting end comprises:

a current transformer for converting a current flowing through a monitored point into a voltage;

a regulated power supply for converting a voltage output by the current transformer into an operating voltage of a temperature sensor, a first processor, and a transmitting module;

a temperature sensor, configured to monitor a first temperature of the monitored point, and send the first temperature data to the first processor;

a first processor, configured to collect the first temperature output by the temperature sensor at a preset time interval, and send the first temperature data to the transmitting module;

And a transmitting module, configured to send the first temperature data output by the first processor to the receiving end.

3. The wireless temperature monitoring system according to claim 1 or 2, wherein the receiving end comprises:

a voltage conversion module, configured to convert a voltage outputted by the battery on the locomotive to an operating voltage of the second processor and the receiving module;

a receiving module, configured to receive first temperature data output by the transmitting end, and output the same to the second processor;

a second processor, configured to calculate a temperature rise of the monitored point relative to a temperature of the environment according to the first temperature data from the receiving module and the second temperature data from the ambient temperature monitoring end, if the temperature rise is greater than An alarm is issued when a preset threshold is set.

4. The wireless temperature monitoring system according to claim 3, wherein the receiving end further comprises a human-machine interaction screen for displaying temperature and alarm information of the monitored point.

The wireless temperature monitoring system according to claim 4, wherein the human-machine interaction screen is further configured to record a historical over-temperature point, set an over-temperature threshold, and set a system parameter.