CN112946163A - Bundled wire and cable combustion testing machine and control process and control method thereof - Google Patents
Bundled wire and cable combustion testing machine and control process and control method thereof Download PDFInfo
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- CN112946163A CN112946163A CN202110065898.0A CN202110065898A CN112946163A CN 112946163 A CN112946163 A CN 112946163A CN 202110065898 A CN202110065898 A CN 202110065898A CN 112946163 A CN112946163 A CN 112946163A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
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- H—ELECTRICITY
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Abstract
The invention discloses a bundled wire and cable combustion testing machine which comprises a video monitor, an upper computer connected with the video monitor and a PLC (programmable logic controller) connected with the upper computer; the invention also discloses a control flow of the bundled wire and cable combustion testing machine, which comprises a self-checking link, a system setting link, a test setting link and a system judging link; the invention also discloses a control method of the bundled wire and cable combustion testing machine, which comprises equipment debugging, system setting, test setting and starting testing. The invention utilizes the embedded all-in-one machine, controls data acquisition and processing through the PLC, edits the whole test flow through application software, realizes that data parameters can be set, modified and calibrated, increases video monitoring links, can monitor, inquire and review the test process, improves the automation degree of the whole system, simplifies the test flow, and is closer to the execution standard in terms of data precision.
Description
Technical Field
The invention relates to a bundled wire and cable combustion testing machine, in particular to a bundled wire and cable combustion testing machine and a control flow and a control method thereof.
Background
According to the fire statistics data published by the fire department in recent years, the starting number of electrical fires accounts for about 30 percent of the total number of fires. In recent years, in the distribution of direct causes of major fires, particularly major fires, electrical line faults account for about 70% of the total number of electrical fires. The wire and cable are one of the important components of an electrical circuit, and can be a medium for fire propagation in the combustion process. Therefore, the flame retardancy of the wire and cable itself is very important for building fire.
In order to evaluate the quality of the flame-retardant cable, the national organization establishes the standard of the flame-retardant cable combustion test method. GB/T18380, which is mainly used for evaluating flame-retardant cables from flame spread, is equivalent to IEC 60332. The invention is in accordance with GB/T18380.31-2008 part 31 of the burning test of cables and optical cables under flame conditions: the device is a national standard of a vertically-installed bundled wire cable flame logging spreading test device. The control method of the bundled wire and cable testing machine is designed to complete the testing process required by national standards and judge whether the wire and cable meet the production standard requirements. The test device in the prior art has complex test flow and lower precision.
Disclosure of Invention
The invention aims to solve the problem that in GB/T18380.31-2008, part 31 of a combustion test of cables and optical cables under the condition of flame: the system has the advantages of high automation degree, simple and convenient operation, friendly interface, high accuracy, clear flow and good man-machine interaction.
The purpose of the invention is realized as follows: a bunched wire and cable combustion testing machine comprises a video monitor, an upper computer connected with the video monitor, and a PLC (programmable logic controller) connected with the upper computer;
the PLC controller is connected with the upper computer through a serial port and comprises 8 paths of digital output ports, and the 8 paths of digital output ports respectively control the gas first electromagnetic valve, the gas second electromagnetic valve, the air first electromagnetic valve, the air second electromagnetic valve, the air inlet electromagnetic valve, the ignition first relay and the ignition second relay;
the PLC controller comprises 4 paths of analog quantity output control ports, and the 4 paths of analog quantity output control ports are used for controlling the flow of a gas-fired primary flowmeter, controlling the flow of a gas-fired secondary flowmeter, controlling the flow of an air-fired primary flowmeter and controlling the flow of an air-fired secondary flowmeter respectively;
the PLC controller comprises 6 analog quantity measuring channels, and the 6 analog quantity measuring channels are used for measuring the flow of the gas-fuel flow meter, measuring the flow of the air-fuel flow meter, measuring the air inlet speed and measuring the temperature respectively.
Preferably, the video monitoring uses a camera lens with 130 ten thousand color pixels.
Preferably, the upper computer is an embedded all-in-one computer.
The invention also discloses a control flow of the bundled wire and cable combustion testing machine, which comprises a self-checking link after starting, a system setting link after self-checking, a test setting link after setting system parameters, a testing link after setting test parameters, a system for judging whether the test result is qualified after the test is finished, a data report is printed if the unqualified flow returns to the system setting for continuing, and the whole test flow is finished after the test report is printed if the test data is qualified.
The invention also discloses a control method of the bundled wire and cable combustion testing machine, which is characterized by comprising the following steps:
step one, equipment debugging: the device commissioning includes the following aspects:
A. and (3) relay output control: the upper computer equipment debugging interface determines that the relays of the gas I, the ignition I, the air I, the gas II, the ignition II, the air II and the air inlet machine can be controlled by manually testing the action results of the control relays of the gas I, the ignition I, the air I, the gas II, the ignition II, the air II and the air inlet machine;
B. and (3) data output control: the difference between the measured data and the actual data of the first air flow, the first gas flow, the second air flow and the second gas flow is calibrated by setting an interface, the flow data of the flowmeter is corrected by a correction coefficient C, and the formula of the correction coefficient C is as follows:
in the formula: t is1And T2Is absolute temperature in kelvin; p1And P2Is absolute air pressure in kilopascals; p1And T1Pressure and temperature under design conditions; p2And T2The pressure and the temperature under the actual working condition;
C. data acquisition: checking deviation of the actual value and the simulated value of the temperature, the first gas flow, the second gas flow, the first air flow, the second air flow and the intake air in the combustion box displayed by software, and continuing to execute the next step within an error range;
step two, system setting, wherein the system setting comprises the following aspects:
s1, selecting and setting an acquisition control module port of the PLC, selecting an interface and a name of the industrial camera according to a communication protocol of the PLC and a selected communication mode, selecting a COM2 port of the camera according to design requirements, and storing all settings;
s2, setting temperature options, namely setting the upper limit value of the temperature to be 200 ℃, the lower limit value of the temperature to be 0 ℃ and setting the temperature correction value to be 0; setting the upper limit value of the temperature analog signal to be 20mA, setting the lower limit value of the temperature analog signal to be 4mA, and storing all the settings;
s3, flow option setting, wherein the first air flow specification is set to 100L/min, the first air flow conversion coefficient is set to 1.006, the second air flow specification is set to 100L/min, the second air flow conversion coefficient is set to 1.006, the first gas flow specification is set to 15L/min, the first gas flow conversion coefficient is set to 0.719, the second gas flow specification is set to 15L/min, the second gas flow conversion coefficient is set to 0.719, the exhaust specification is set to 20, and the exhaust air compensation is set to 0;
step three, test setting: setting the flow required by the test for the first air flow, the flow required by the test for the first gas flow, the flow required by the test for the second air flow and the flow required by the test for the second gas flow;
step four, starting testing: after the setting of the first step, the second step and the third step is carried out, clicking to start testing to enter a testing window, and selecting automatic testing or manual testing.
The invention has the beneficial effects that:
the invention utilizes the embedded all-in-one machine, controls data acquisition and processing through the PLC, edits the whole test flow through application software, realizes that data parameters can be set, modified and calibrated, increases video monitoring links, can monitor, inquire and review the test process, improves the automation degree of the whole system, simplifies the test flow, and is closer to the execution standard in terms of data precision.
Drawings
FIG. 1: the invention provides a system framework diagram of a bundled wire and cable combustion tester.
FIG. 2: the invention provides a control flow chart of a bundled wire and cable combustion testing machine.
In the figure: 1. video monitoring, 2, an upper computer, 3 and a PLC controller.
Detailed Description
The invention is described in further detail below with reference to the following figures and examples of embodiments: the embodiment is implemented on the premise of the technical scheme of the invention, and the embodiment and the operation process are given, but the protection scope of the invention is not limited by the following embodiment.
Example 1
The invention aims at GB/T18380.31-2008' flame test of cables and optical cables under flame conditions part 31: the system has the advantages of high automation degree, simple and convenient operation, friendly interface, high accuracy, clear flow and good man-machine interaction.
A bunched wire and cable combustion testing machine comprises a video monitor, an upper computer connected with the video monitor, and a PLC (programmable logic controller) connected with the upper computer. The video monitoring is a camera lens with 130 ten thousand color pixels and a network interface. The upper computer is an embedded all-in-one computer, a 4G memory, a 500G hard disk, a double-network port, a serial port, a 485 interface and a win 732-bit operating system.
The PLC is connected with an upper computer through a serial port and is provided with 8 paths of digital output ports, and the ports respectively control a gas first electromagnetic valve, a gas second electromagnetic valve, an air first electromagnetic valve, an air second electromagnetic valve, an air inlet electromagnetic valve, an ignition first relay and an ignition second relay; the 4-path analog quantity output control ports are used for controlling the flow of a gas-fuel flow meter, controlling the flow of a gas-fuel two-flow meter, controlling the flow of an air-fuel one-flow meter and controlling the flow of an air-fuel two-flow meter; the system is provided with 8 analog quantity measuring channels, wherein 6 analog quantity measuring channels are used, the 6 analog quantity measuring channels are respectively used for measuring the flow rate of a gas flowmeter, measuring the flow rate of an air flowmeter, measuring the air inlet speed and measuring the temperature, and the rest 2 analog quantity measuring channels are reserved.
Example 2
The control flow of the bundled wire and cable combustion testing machine disclosed by the embodiment is characterized in that a specific control flow is firstly a starting flow, a self-checking link is entered after starting, a system setting link is entered after self-checking, a test setting link is entered after setting of system parameters, a test link is entered after setting of test parameters is completed, the system can judge whether a test result is qualified after the test is finished, if the unqualified flow returns to the system setting for continuous operation, if the test data is qualified, a data report is printed, and the whole test flow is finished after the test report is printed.
Example 3
The embodiment discloses a control method of a popular wire and cable combustion testing machine, which comprises the following steps:
step one, equipment debugging: equipment debugging is a process of equipment self-test before the test, and comprises three aspects:
A. and (4) controlling the output of a relay, and manually testing the action results of control relays of the gas I, the ignition I, the air I, the gas II, the ignition II, the air II and the air inlet machine on a debugging interface of the upper computer equipment to determine that the relays of the gas I, the ignition I, the air I, the gas II, the ignition II, the air II and the air inlet machine can be controlled.
B. And (3) data output control, wherein the difference between the measured data of the first air flow, the first gas flow, the second air flow and the second gas flow and the actual data is calibrated by setting an interface, the flow data of the flowmeter is corrected by a correction coefficient C, and the formula of the correction coefficient C is as follows:
in the formula: in the formula: t is1And T2Is absolute temperature in kelvin; p1And P2Is absolute air pressure in kilopascals; p1And T1Pressure and temperature under design conditions; p2And T2Pressure and temperature under actual operating conditions.
C. Data acquisition: checking the deviation of the actual value and the simulated value of the temperature, the first gas flow, the second gas flow, the first air flow, the second air flow, the intake air flow in the combustion box displayed by the software, and continuing to execute the next step within the error range.
Step two, system setting, wherein the system setting is divided into three aspects:
s1, selecting and setting an acquisition control module port of the PLC, and selecting COM1 as a communication port according to a communication protocol of the PLC and a selected communication mode; selecting interfaces and names of industrial cameras, selecting COM2 interfaces of the cameras and CAMORA1 names of the cameras according to design requirements, and storing all settings.
S2, setting temperature options, namely setting the upper limit value of the temperature to be 200 ℃, the lower limit value of the temperature to be 0 ℃ and setting the temperature correction value to be 0; the upper limit value of the temperature analog signal is set to 20mA, the lower limit value of the temperature analog signal is set to 4mA, and all the settings are saved.
S3, flow option setting, wherein the first air flow specification is set to 100L/min, the first air flow conversion coefficient is set to 1.006, the second air flow specification is set to 100L/min, the second air flow conversion coefficient is set to 1.006, the first gas flow specification is set to 15L/min, the first gas flow conversion coefficient is set to 0.719, the second gas flow specification is set to 15L/min, the second gas flow conversion coefficient is set to 0.719, the exhaust specification is set to 20, and the exhaust air compensation is set to 0.
Step three, test setting: setting the flow required by the test for the first air flow, the flow required by the test for the first gas flow, the flow required by the test for the second air flow and the flow required by the test for the second gas flow.
Step four, starting testing: after the setting of the first step, the second step and the third step, clicking to start testing to enter a testing window, and selecting automatic testing or manual testing.
Claims (5)
1. The utility model provides a bunched line electric wire and cable burning test machine which characterized in that: the system comprises a video monitor, an upper computer connected with the video monitor and a PLC (programmable logic controller) connected with the upper computer;
the PLC controller is connected with the upper computer through a serial port and comprises 8 paths of digital output ports, and the 8 paths of digital output ports respectively control the gas first electromagnetic valve, the gas second electromagnetic valve, the air first electromagnetic valve, the air second electromagnetic valve, the air inlet electromagnetic valve, the ignition first relay and the ignition second relay;
the PLC controller comprises 4 paths of analog quantity output control ports, and the 4 paths of analog quantity output control ports are used for controlling the flow of a gas-fired primary flowmeter, controlling the flow of a gas-fired secondary flowmeter, controlling the flow of an air-fired primary flowmeter and controlling the flow of an air-fired secondary flowmeter respectively;
the PLC controller comprises 6 analog quantity measuring channels, and the 6 analog quantity measuring channels are used for measuring the flow of the gas-fuel flow meter, measuring the flow of the air-fuel flow meter, measuring the air inlet speed and measuring the temperature respectively.
2. A bunched wire and cable burn testing machine according to claim 1, wherein: the video monitoring adopts a camera lens with 130 ten thousand color pixels.
3. A bunched wire and cable burn testing machine according to claim 1, wherein: the upper computer is an embedded all-in-one computer.
4. The utility model provides a control flow of beam forming wire and cable burning test machine which characterized in that: the method comprises the steps of starting, entering a self-checking link, entering a system setting link after self-checking, entering a test setting link after setting of system parameters, entering a test link after setting of test parameters is completed, judging whether a test result is qualified or not by the system after the test is finished, returning to the system for continuous operation if the test result is unqualified, and printing a data report if the test data is qualified, and finishing the whole test process after the test report is printed.
5. A control method of a bundled wire and cable combustion testing machine is characterized by comprising the following steps:
step one, equipment debugging: the device commissioning includes the following aspects:
A. and (3) relay output control: the upper computer equipment debugging interface determines that the relays of the gas I, the ignition I, the air I, the gas II, the ignition II, the air II and the air inlet machine can be controlled by manually testing the action results of the control relays of the gas I, the ignition I, the air I, the gas II, the ignition II, the air II and the air inlet machine;
B. and (3) data output control: the difference between the measured data and the actual data of the first air flow, the first gas flow, the second air flow and the second gas flow is calibrated by setting an interface, the flow data of the flowmeter is corrected by a correction coefficient C, and the formula of the correction coefficient C is as follows:
in the formula: t is1And T2Is absolute temperature in kelvin; p1And P2Is absolute air pressure in kilopascals; p1And T1Pressure and temperature under design conditions; p2And T2The pressure and the temperature under the actual working condition;
C. data acquisition: checking the deviation of the actual value and the simulated value of the temperature, the first gas flow, the second gas flow, the first air flow, the second air flow and the intake air in the software display data box, and continuing to execute the next step within an error range;
step two, system setting, wherein the system setting comprises the following aspects:
s1, selecting and setting an acquisition control module port of the PLC, selecting an interface and a name of the industrial camera according to a communication protocol of the PLC and a selected communication mode, selecting a COM2 port of the camera according to design requirements, and storing all settings;
s2, setting temperature options, namely setting the upper limit value of the temperature to be 200 ℃, the lower limit value of the temperature to be 0 ℃ and setting the temperature correction value to be 0; setting the upper limit value of the temperature analog signal to be 20mA, setting the lower limit value of the temperature analog signal to be 4mA, and storing all the settings;
s3, flow option setting, wherein the first air flow specification is set to 100L/min, the first air flow conversion coefficient is set to 1.006, the second air flow specification is set to 100L/min, the second air flow conversion coefficient is set to 1.006, the first gas flow specification is set to 15L/min, the first gas flow conversion coefficient is set to 0.719, the second gas flow specification is set to 15L/min, the second gas flow conversion coefficient is set to 0.719, the exhaust specification is set to 20, and the exhaust air compensation is set to 0;
step three, test setting: setting the flow required by the test for the first air flow, the flow required by the test for the first gas flow, the flow required by the test for the second air flow and the flow required by the test for the second gas flow;
step four, starting testing: after the setting of the first step, the second step and the third step is carried out, clicking to start testing to enter a testing window, and selecting automatic testing or manual testing.
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2021
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Application publication date: 20210611 |