CN107605574A - The on-line automatic warning system of grain catcher failure and control method - Google Patents

Abstract

An on-line automatic alarm system and control method for particle trap failure, the microcontrollers are respectively connected: a data acquisition unit for collecting vehicle information, a GPS communication module for receiving vehicle latitude and longitude information and vehicle speed information, and a GPS communication module for calculating time information The RTC clock module, the data storage module for analyzing and storing vehicle information, and the warning indicator light control module for warning. The information is sent online in real time to an external data monitoring platform. By collecting and analyzing the data of engine speed, exhaust temperature downstream of the particulate filter and exhaust back pressure, it can monitor whether the DPF is working normally and give a timely alarm when the DPF fails. The invention can judge whether the particle trap and each temperature and pressure sensor are working normally, and automatically raise an alarm when the corresponding components fail, so as to effectively reduce the diesel engine particle and fuel consumption.

Description

Particle trap failure online automatic alarm system and control method

technical field

The invention relates to an alarm system. In particular, it relates to an on-line automatic warning system and control method for particle trap failure based on exhaust temperature and back pressure for diesel vehicles equipped with particle traps.

Background technique

Exhaust emissions from motor vehicles, especially heavy-duty diesel vehicles, have become the primary source of air pollution in my country and an important factor causing haze and photochemical smog pollution. According to the "Annual Report on the Prevention and Control of Motor Vehicle Pollution in China", the number of diesel vehicles accounts for 16.1% of the total number of vehicles, and its nitrogen oxide and particulate matter emissions account for 68.1% and 90% of the total vehicle pollutant emissions. Therefore, eliminating or treating the running "yellow label vehicles" can effectively reduce the emissions of NOx and particulate matter from diesel vehicles.

For some "yellow label vehicles" with relatively good condition, low mileage and high residual value, by installing post-processing equipment on them, it is possible to reduce the pollution emissions of motor vehicles while saving social resources. Diesel particulate filter is the most effective technical method recognized so far to remove diesel particulate emissions, and it is one of the key technologies to deal with stricter emission regulations in the future.

At present, Nanjing, Wuhan, Shandong and other provinces and cities in China are adopting DPF technology to transform in-use vehicles. Beijing's "2013-2017 Clean Air Action Plan" clearly stipulates that before the end of 2014, all new heavy-duty diesel vehicles will implement the fifth stage of motor vehicle emission standards, and heavy-duty diesel vehicles used in the city must be equipped with particulate matter filters.

The particulate matter trap traps particulate matter through its filter carrier, and then burns the particulate matter trapped in the filter carrier through high-temperature oxidation to complete the regeneration of the trap and realize the continuous operation of the particulate matter filter. When the relevant components of the particulate matter filter fail, if the driver cannot be promptly and effectively prompted to troubleshoot and deal with the failed components, the regeneration process will not be completed according to the preset conditions, resulting in an increase in engine exhaust back pressure, a decrease in filtration efficiency, and diesel engine failure. Fuel economy and power deteriorate and cause more serious exhaust pollution, and even lead to diesel engine failure and vehicle damage.

Contents of the invention

The technical problem to be solved by the present invention is to provide an on-line automatic alarm system and control method based on exhaust temperature and back pressure for particle trap failure, which can prompt the driver to take measures to ensure the normal performance of the particle trap. It also provides data support for the safe use, benefit evaluation and product optimization improvement of DPF.

The technical solution adopted in the present invention is: an online automatic alarm system for particle trap failure, including a microcontroller, and the microcontrollers are respectively connected to: a data acquisition unit for collecting vehicle information, and a data acquisition unit for receiving vehicle latitude and longitude A GPS communication module for information and vehicle speed information, an RTC clock module for calculating time information, a data storage module for analyzing and storing vehicle information, and a warning indicator light control module for warning, the data storage The module is also connected to the GPRS communication module, which is used to send the data information of the vehicle to the external data monitoring platform in real time online through the GPRS communication module.

The data acquisition unit includes a data acquisition module whose signal output end is connected to the signal input end of the microcontroller, and the signal input ends of the data acquisition module are respectively connected to: the CAN bus communication module, the first pressure sensor, the first A temperature sensor, a second pressure sensor and a second temperature sensor, wherein the signal input end of the CAN bus communication module is connected to the vehicle OBD diagnostic interface, and the first pressure sensor and the first temperature sensor are arranged on the particle trap (15 ), the second pressure sensor and the second temperature sensor are arranged at the outlet end of the particle trap.

The warning indicator light control module is respectively connected with the warning indicator light and the engine ignition control terminal.

The warning indicator light includes a red LED indicator light, a yellow LED indicator light and a green LED indicator light.

A control method for an online automatic alarm system for particle trap failure, comprising:

1) After the system is powered on, the GPRS communication module first sends the system online information to the data monitoring platform, and lights up the green LED indicator in the alarm indicator;

2) The microcontroller reads the engine speed, exhaust temperature, exhaust pressure, GPRS positioning, and clock data through the data acquisition unit;

3) Compare whether the exhaust pressure and exhaust temperature are higher than the set normal limit value. When the exhaust pressure and exhaust temperature are kept at the set normal limit value, go to step 5). When at least one item of air temperature is higher than the set normal limit value, enter step 4);

4) Compare whether the exhaust pressure and exhaust temperature data are higher than the maximum exhaust pressure and exhaust temperature limits set by the system, when the exhaust pressure and exhaust temperature are not higher than the maximum exhaust pressure and exhaust temperature set by the system When the exhaust temperature is limited, light the yellow LED indicator, and when at least one of the exhaust pressure and exhaust temperature is higher than the maximum exhaust pressure and exhaust temperature limit set by the system, enter step 8);

5) Store the read engine speed, exhaust temperature, exhaust pressure, GPRS positioning, and clock data in the data storage module, and send them to an external data monitoring platform through the GPRS communication module;

6) Detect whether the engine is stopped, if the engine is not stopped, then return to step 2) to continue the cycle, if the engine is stopped, go to step 7)

7) Record the parking time and location information, and send the end signal to the external data monitoring platform;

8) Send engine speed information, exhaust pressure, exhaust temperature, time and GPS positioning information to an external data monitoring platform;

9) Turn on the red LED indicator light and cut off the engine ignition control terminal through the alarm indicator control module, thereby cutting off the ignition switch power supply and forcing the engine to stop.

6. The control method of the particulate matter trap failure online automatic warning system based on exhaust temperature and back pressure according to claim 5, characterized in that before sending data to an external data monitoring platform, the sent data is automatically The data is kept confidential by AES, and the key with a length of 256Bit is used to ensure the security of the data; when the sent data is abnormal, an alarm message is sent in time.

The particle trap failure online automatic alarm system and control method of the present invention collect engine speed, pressure difference and temperature data at the inlet and outlet of the particle trap, and upload the data to the monitoring platform in real time, and the monitoring platform calculates and analyzes the data , can judge whether the particulate matter trap and each temperature and pressure sensor are working normally, and automatically raise an alarm when the corresponding component fails, and can prompt the driver to take measures to ensure the normal performance of the particulate matter trap, effectively reducing diesel engine particulate matter and fuel oil Consumption, to provide data support to ensure the safe use of DPF, conduct environmental benefit assessments, and continuously optimize and improve products.

Description of drawings

Fig. 1 is a block diagram of the online automatic alarm system for particle trap failure of the present invention;

Fig. 2 is the constitution block diagram of data acquisition unit among the present invention;

Fig. 3 is a schematic diagram of the output signal connection of the alarm indicator light control module in the present invention;

Fig. 4 is a control flow chart of the on-line automatic alarm system for particle trap failure of the present invention.

in the picture

1: Microcontroller 2: Data Acquisition Unit

3: GPS communication module 4: Data storage module

5: GPRS communication module 6: RTC clock module

7: Alarm indicator control module 8: CAN bus communication module

9: Vehicle OBD diagnostic interface 10: Data acquisition module

11: First pressure sensor 12: First temperature sensor

13: Second pressure sensor 14: Second temperature sensor

15: Particle filter 16: Alarm indicator light

17: Engine ignition control terminal

detailed description

The online automatic alarm system and control method for particle trap failure of the present invention will be described in detail below with reference to the embodiments and the accompanying drawings.

As shown in Fig. 1, the particle trap failure online automatic alarm system of the present invention includes a microcontroller 1, and the microcontroller 1 is respectively connected to: a data acquisition unit 2 for collecting vehicle information, and a data acquisition unit 2 for receiving vehicle information. GPS communication module 3 for longitude and latitude information and vehicle speed information, RTC clock module 6 for calculating time information, data storage module 4 for analyzing and storing vehicle information, and warning indicator light control module 7 for warning, The data storage module 4 is also connected to the GPRS communication module 5 for sending the data information of the vehicle to an external data monitoring platform online in real time through the GPRS communication module 5 .

The particle trap failure online automatic alarm system of the present invention will automatically perform AES encryption on the sent data before the data is sent, and use a key with a length of 256Bit to ensure the security of the data; when the sent data is abnormal, it will be sent in time Warning message.

As shown in Figure 2, described data acquisition unit 2 comprises the data acquisition module 10 that signal output end is connected with the signal input end of described micro-controller 1, and the signal input end of described data acquisition module 10 is respectively connected: for The CAN bus communication module 8 that acquires the engine speed signal during vehicle operation in real time, the first pressure sensor 11 and the first temperature sensor 12 that collect the pressure and temperature information at the inlet end of the particle trap 15, and the pressure and temperature sensors at the outlet end of the particle trap 15 The second pressure sensor 13 and the second temperature sensor 14 of temperature information, wherein, the signal input end of described CAN bus communication module 8 connects vehicle OBD diagnosis interface 9 to read engine speed signal, and described first pressure sensor 11 and the second A temperature sensor 12 is arranged at the inlet end of the particle trap 15 , and the second pressure sensor 13 and the second temperature sensor 14 are arranged at the outlet end of the particle trap 15 . The data acquisition module 10 reads each sensor signal in real time and converts it into data information, which is transmitted to the microcontroller 1 through the transmission terminal

As shown in Figure 3, the warning indicator light control module 7 is respectively connected to the warning indicator light 16 and the engine ignition control terminal 17, which is used to control the state of the warning indicator light and to ensure that the particulate matter trap 15 parts fail to stop in time . The warning indicator light 16 includes a red LED indicator light 161 , a yellow LED indicator light 162 and a green LED indicator light 163 . Among them, when the temperature and pressure signal of the particle trap 15 is in the normal range at a predetermined speed, the green light is on, indicating that the particle trap 15 is working normally; Light the yellow light during the safety limit, prompting the driver to process in time; when the temperature and pressure signal exceeds the safety limit for a continuous period of time, light the red indicator light and send an instruction to the engine ignition control terminal 17 to force the vehicle to stop for maintenance.

The particle trap failure online automatic alarm system of the present invention provides power from the vehicle OBD diagnostic interface 9 to supply power to each module of the system. External power module.

The on-line automatic alarm system for particle trap failure of the present invention is integrally packaged in an aluminum box and connected to the vehicle OBD diagnostic interface 9 through a connecting wire harness.

Before using the particle trap failure online automatic alarm system of the present invention, the vehicle OBD diagnostic interface 9 is powered on when the vehicle is started, and the automatic alarm system connected to the vehicle OBD diagnostic interface 9 can be automatically powered on, and each module is normally powered on. The microcontroller 1 starts to read and process the data transmitted by each module, and controls other modules to operate in coordination.

In the embodiment of the present invention: the microcontroller 1 uses a chip of model MC9S12XEP100; the data storage module 4 uses a chip of model AS7C4098; the data acquisition module 10 uses a chip of model TDA61.

The control method of the particle trap failure online automatic alarm system of the present invention includes:

1) After the system is powered on, the GPRS communication module first sends the system online information to the data monitoring platform, and lights up the green LED indicator in the alarm indicator;

2) The microcontroller reads the engine speed, exhaust temperature, exhaust pressure, GPRS positioning, and clock data through the data acquisition unit;

3) Compare whether the exhaust pressure and exhaust temperature are higher than the set normal limit value. When the exhaust pressure and exhaust temperature are kept at the set normal limit value, go to step 5). When at least one item of air temperature is higher than the set normal limit value, enter step 4);

4) Compare whether the exhaust pressure and exhaust temperature data are higher than the maximum exhaust pressure and exhaust temperature limits set by the system, when the exhaust pressure and exhaust temperature are not higher than the maximum exhaust pressure and exhaust temperature set by the system When the exhaust temperature is limited, light the yellow LED indicator, and when at least one of the exhaust pressure and exhaust temperature is higher than the maximum exhaust pressure and exhaust temperature limit set by the system, enter step 8);

5) Store the read engine speed, exhaust temperature, exhaust pressure, GPRS positioning, and clock data in the data storage module, and send them to an external data monitoring platform through the GPRS communication module;

6) Detect whether the engine is stopped, if the engine is not stopped, then return to step 2) to continue the cycle, if the engine is stopped, go to step 7)

7) Record the parking time and location information, and send the end signal to the external data monitoring platform;

8) Send engine speed information, exhaust pressure, exhaust temperature, time and GPS positioning information to an external data monitoring platform;

9) Turn on the red LED indicator light and cut off the engine ignition control terminal through the alarm indicator control module, thereby cutting off the ignition switch power supply and forcing the engine to stop.

Claims (6)

1. An on-line automatic warning system for particle trap failure, comprising a microcontroller (1), characterized in that the microcontroller (1) is respectively connected to: a data acquisition unit (2) for collecting vehicle information , a GPS communication module (3) for receiving vehicle latitude and longitude information and vehicle speed information, an RTC clock module (6) for calculating time information, a data storage module (4) for analyzing and storing vehicle information, and using For the warning indicator light control module (7) for warning, the data storage module (4) is also connected to the GPRS communication module (5), and is used to send the data information of the vehicle to the outside in real time through the GPRS communication module (5) data monitoring platform. 2. The particle trap failure online automatic alarm system according to claim 1, characterized in that the data acquisition unit (2) includes a signal output terminal connected to the signal input terminal of the microcontroller (1) The data acquisition module (10), the signal input end of described data acquisition module (10) is connected respectively: CAN bus communication module (8), the first pressure sensor (11), the first temperature sensor (12), the second pressure Sensor (13) and second temperature sensor (14), wherein, the signal input end of described CAN bus communication module (8) connects vehicle OBD diagnosis interface (9), and described first pressure sensor (11) and first temperature The sensor (12) is arranged at the inlet end of the particle trap (15), and the second pressure sensor (13) and the second temperature sensor (14) are arranged at the outlet end of the particle trap (15). 3. The particle trap failure online automatic alarm system according to claim 1, characterized in that, the alarm indicator light control module (7) is respectively connected to the alarm indicator light (16) and the engine ignition control terminal (17) . 4. The particle trap failure online automatic alarm system according to claim 3, characterized in that, the alarm indicator light (16) includes a red LED indicator light (161), a yellow LED indicator light (162) and Green LED indicator light (163). 5. A control method for the particle trap failure online automatic alarm system according to claim 1, characterized in that it comprises: 1) After the system is powered on, the GPRS communication module first sends the system online information to the data monitoring platform, and lights up the green LED indicator in the alarm indicator; 2) The microcontroller reads the engine speed, exhaust temperature, exhaust pressure, GPRS positioning, and clock data through the data acquisition unit; 3) Compare whether the exhaust pressure and exhaust temperature are higher than the set normal limit value. When the exhaust pressure and exhaust temperature are kept at the set normal limit value, go to step 5). When at least one item of air temperature is higher than the set normal limit value, enter step 4); 4) Compare whether the exhaust pressure and exhaust temperature data are higher than the maximum exhaust pressure and exhaust temperature limits set by the system, when the exhaust pressure and exhaust temperature are not higher than the maximum exhaust pressure and exhaust temperature set by the system When the exhaust temperature is limited, light the yellow LED indicator, and when at least one of the exhaust pressure and exhaust temperature is higher than the maximum exhaust pressure and exhaust temperature limit set by the system, enter step 8); 5) Store the read engine speed, exhaust temperature, exhaust pressure, GPRS positioning, and clock data in the data storage module, and send them to an external data monitoring platform through the GPRS communication module; 6) Detect whether the engine is stopped, if the engine is not stopped, then return to step 2) to continue the cycle, if the engine is stopped, go to step 7) 7) Record the parking time and location information, and send the end signal to the external data monitoring platform; 8) Send engine speed information, exhaust pressure, exhaust temperature, time and GPS positioning information to an external data monitoring platform; 9) Turn on the red LED indicator light and cut off the engine ignition control terminal through the alarm indicator control module, thereby cutting off the ignition switch power supply and forcing the engine to stop. 6. The control method of the particle trap failure online automatic alarm system according to claim 5, characterized in that, before sending data to an external data monitoring platform, AES confidentiality is automatically performed on the sent data, and the length of use is 256Bit key to ensure data security; when the sent data is abnormal, it will send an alarm message in time.