The framework of vehicle pollution emission laboratory information system is shown in the above figure.
First, the inspection agency end system
1. System software of testing organization for information system of motor vehicle emission laboratory.
The test methods are specified in the standard, including double idle speed method, simple transient condition method, steady condition method, loading deceleration condition method, free acceleration opaque smoke method and so on. And automatically control the measurement of exhaust pollutants and record the data of related processes.
It has the function of collecting and recording inspection and self-inspection data of inspection equipment according to standards, including five-gas analyzer, smoke meter, chassis dynamometer, flow analyzer (suitable for areas where transient working condition method is to be adopted), tachometer, weather station, etc.
It should be able to carry out vehicle inspection, respond to instructions, carry out equipment self-inspection and inspection in accordance with standards, and complete the accurate uploading of inspection time start and end data, inspection and inspection result data, process data and other data that need to be uploaded. In the process of inspection, the inspection data and status should be fed back in real time, and be monitored by the inspection organization.
2, equipment and system self-inspection
Check the equipment for self-inspection, abnormal equipment inspection, abnormal data during inspection (for example, the accumulated over-tolerance time of vehicle speed exceeds the standard, the continuous over-tolerance time exceeds the standard, the oxygen concentration is abnormal, the process data is incomplete, the sampling gas flow rate is low, leakage occurs, the gas collector flow rate is low, the environmental information is abnormal, the engine speed and speed ratio are abnormal, the dynamometer absorbs power abnormally, and the drum linear speed is abnormal). , will promptly report to the police, prompting inspectors to terminate the inspection under the condition of ensuring the safety of the inspection.
3. Information management system
It has the information maintenance and management functions of inspection institutions, inspection lines, inspection equipment, inspectors, inspection reports, substances exceeding the standard, inspection consumables, vehicle information and so on.
Violation inquiry: The system should be equipped with vehicle OBD remote online monitoring and environmental violation inquiry to inquire whether the vehicle status is normal, give early warning to vehicles with violations and unprocessed violations, and detect unqualified vehicles online.
Second, the inspection control
1, visual inspection
External inspection entry function, the registrant carefully fills in the grade information required by the system according to the driving license and appearance inspection list, and assigns the inspection line after entry. The system should be able to automatically input vehicle parameters, such as gearbox type, maximum gross mass, reference mass, engine power, intake mode, driving mode, emission standard, etc. When the vehicle to be registered is externally inspected, it should read the on-board list, check the key configuration and collect relevant information.
According to the standard, it has the functions of vehicle pollution control device inspection and OBD inspection.
2. Emission inspection
The communication function with the detection equipment control software can send the detection start, stop, self-check and other instructions to the detection equipment control software, and can send vehicle parameters and receive the returned detection process and result data.
3. Data synchronization
All kinds of information of inspection institutions should be synchronized with the management supervision system according to the requirements of the management department.
4, inspection methods and limits
After the vehicle external inspection information is input, the system shall allocate inspection methods, inspection lines and limit values according to the vehicle information and standard requirements. According to different inspection methods, the inspection limits include carbon monoxide, hydrocarbons, nitrogen oxides, smoke value, excess air coefficient, wheel power, etc. The inspection organization shall ensure the accurate application of inspection limits.
5. Calibration of control software of inspection equipment
The system shall record the version of control software for inspection equipment. If it is found that the inspection equipment control software has changed the program files and configuration information, an early warning should be prompted. If it is confirmed that the software needs to be upgraded remotely, it shall be reported to the management and supervision system for the record, and the upgrade content and version number shall be recorded.
6. Printing of emission inspection report
The system uploads the complete inspection data as required, and automatically prints the emission inspection report after receiving the inspection report code fed back by the management and supervision system.
7, equipment failure and maintenance
Record equipment failure and maintenance as required, such as maintenance time, failure reason, maintenance personnel, maintenance items and other related information.
8, inspection and self-inspection
Conduct self-inspection and inspection of the equipment according to the standard, and record the corresponding information.
9. Data network
All kinds of information collected, such as inspection environment parameters, inspection result data, inspection process data, inspection self-inspection, equipment failure and maintenance, should be networked with the supervision system in real time.
Third, account management.
1, test account
Comprises a detection line, a detection curve, a detection image and a detection video. Vehicle information registration, charging, vehicle detection, detection uploading, test result report printing, green label, blue label, yellow label printing and other vehicle detection series improve process functions.
2. Enterprise management
Management of issuing qualified vehicle inspection marks. Report statistics: statistics of qualified rate of environmental protection monitoring, statistics of environmental protection monitoring jurisdiction, analysis of qualified rate of environmental protection testing year, analysis of limited value of environmental protection testing, query of testing arbitration data, statistics of single qualified rate of environmental protection vehicle inspection, statistics of steady-state working condition testing, statistics of acceleration and deceleration working condition, and statistics of sign issuance.
3. System management
I station information management, employee data management, customer management (grouping setting, customer setting, customer log management), equipment data management (equipment information management, equipment verification information, original verification records, equipment self-inspection information, equipment maintenance information), detection project management (detection standard management), detection category setting, coding setting, technical parameter maintenance (brand maintenance, engine model maintenance, engine output power limitation) and so on.
4. Inspection report
The inspection report code must be printed on the inspection report and ensure the uniqueness of the inspection report code. The system should collect information about external inspection, vehicles, inspection institutions, inspection process, result records, self-inspection of inspection equipment and inspection data (dynamometer, smoke meter, weather station, flowmeter self-inspection, vehicle speed, torque, parasitic power, taxi loading, tail gas, smoke inspection and OBD inspection) involved in inspection business, and establish corresponding databases.
Fourth, information networking.
Vehicle emission monitoring system is shown in the above figure.
1. Software requirements for management and supervision system of vehicle emission laboratory information system.
It should include motor vehicle external inspection entry, environmental protection key parts inspection, motor vehicle emission inspection, report printing, inspection management (including inspection institutions, inspection lines, inspection equipment, reference materials, etc.). ), vehicle information management, vehicle type management, standard limit management, emission test data management, data statistics summary, etc.
The system should have the networking function of inspection institutions, cities (prefectures), provinces and countries, and realize the sharing and exchange of relevant data according to requirements, including the data interaction of China OBD online monitoring terminal.
The system can expand the business functions of road inspection and spot check, remote sensing detection, maintenance management, new car sales, vehicle scrapping and so on, and can record relevant information.
The monitoring system should have the functions of emission detection and monitoring. If the inspection process is not standardized and the inspection data is abnormal, it shall prompt early warning in time, and the supervision content shall at least include:
1. Whether the external inspection process and parameters are reasonable;
2. Inspection process, including video, license plate, sampling probe, gas collector and image; Check whether the parameters, OBD, benchmark quality, methods, restrictions and environmental parameters used are cheating;
3, the daily operation of inspection institutions, such as equipment self-inspection, inspection and proofreading, material standards, etc. ; Whether the inspection data is complete and whether the received inspection results are consistent with the calculation results of process data.
Inspection data and inspection report code: The inspection data shall include vehicle information, inspection environment parameters, inspection result data, inspection process data, inspection process video and inspection process photos, and shall be submitted to the supervision system in real time.
The supervision system shall generate and return the receipt voucher after confirming the receipt of complete inspection data. The receipt certificate represents that the supervision system has received the corresponding data, which is expressed in the form of inspection report code. The coding information includes the administrative division code, the serial number of the inspection organization, the time when the inspection data is received by the supervision system and the random coding of the supervision system.
According to the video and data flow of the motor vehicle exhaust pollution supervision and management system, combined with the current actual situation, the expansion of the number of vehicles and the number of vehicles is detected.
Verb (abbreviation for verb) data communication
Video stream: one detection line of the detection station monitors a video stream, and the peak value of each video stream is 1Mbit/s, with an average of 500 kbit/s. The peak value of the whole detection station video stream is about 4Mbit/s, with an average of 2 mbit/s. ..
Detection data flow: each detection line works 10 hour every day, and each detection line detects 120 vehicles, and each vehicle takes about 5 minutes. The average data flow is about 100 kbit/s, and the average data flow calculated by two detection lines of a detection station is 200 bit/s.
The state information flow and others shall not exceed 100kbit/s, and the vehicle inspection data shall be divided into text data, photo data, process data, 200K text data, 300K process data and vehicle inspection key point photos 1.
The peak value of uplink data traffic is 4Mbit/s, and considering that the actual uplink effectiveness of network broadband can only reach 80%, under the private network, the detection station adopts 10M optical fiber access, and the supervision center adopts 100M optical fiber access.
Six, motor vehicle emission laboratory information system management and supervision system hardware requirements.
The supervision system should have the function of violation record, manage the records of inspection institutions such as illegal vehicles and cheating vehicles, and synchronize the records to the superior management supervision system in real time.
Inspection institutions should install at least two cameras on the inspection line every day. In principle, the front camera should be installed inside the workshop, in front of the inspection equipment, and the rear camera should be installed behind the workshop. It is required to see the license plate number of the front of the vehicle, the exhaust pipe of the vehicle and the picture of the exhaust sampling pipe inserted into the exhaust pipe of the vehicle clearly during the inspection. The control room of the external inspection line can be equipped with monitoring equipment, which can collect videos or photos of the external inspection process and the operation of the control software of the inspection equipment.
The camera adopts high-definition network camera, and the resolution meets the monitoring requirements. In the process of vehicle emission detection, the laboratory information system will automatically take photos of the key links in the detection process. The video of emission inspection shall ensure that the image is clear and the location is reasonable. Vehicle license plates and detection line numbers in surveillance images and videos are obviously eye-catching. Take photos of key links in the inspection process, and automatically take photos before and after the vehicle, which can clearly show the appearance, license plate number, tires and exhaust device of the vehicle.
Julie German Six Remote OBD Online Monitoring Terminal is shown in the above picture.
Intensify the investigation of 3.5-ton diesel vehicle emission online detection terminal. Equipment needs perfect indicator lights and accurate positioning. The uploaded emission data include vehicle speed, atmospheric pressure, engine torque, friction torque, engine speed, engine fuel flow, output value of NOx sensor, particulate matter, remaining amount of reactant, intake air, coolant temperature, mileage, throttle, three-way catalyst temperature, oxygen sensor voltage, etc. , you can refer to the national standard remote OBD online detection terminal of Speedy Technology H6S for acquisition.
The inspection institution is equipped with local video recording equipment, and the video recording of the inspection process is kept locally (by date). The storage period of historical patrol video is not less than 12 months, and it can be accessed remotely through the management and supervision system.
There are two kinds of localization of video storage during inspection: one is to use local video recording equipment to record and store all videos during work; The other is to use video capture technology to capture the effective video in the detection process and store it in the inspection agency site or server.
This article comes from car home, the author of the car manufacturer, and does not represent car home's position.