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Building material oxygen index test control system and control method and tester

The technology of a control system and control method is applied in the field of building material oxygen index test control system and test instrument, which can solve the problems of rough adjustment of oxygen concentration, inconvenient test time, long test time, and insufficient accuracy, etc., and achieve fast test speed, The effect of accurate test results and accurate measurement data

Active Publication Date: 2016-08-10
NANJING SHANGYUAN ANALYTICAL INSTR
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

GB / T2406-93 Combustion performance test method, the existing combustion test method is given by artificial timing of combustion time and rough adjustment of oxygen concentration, which is very inconvenient and the required test time is long and the accuracy is not accurate enough. Therefore, it is urgently needed Invent a new way to solve a problem

Method used

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  • Building material oxygen index test control system and control method and tester
  • Building material oxygen index test control system and control method and tester
  • Building material oxygen index test control system and control method and tester

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Embodiment one, see figure 1 As shown, a building material oxygen index test control system includes an oxygen concentration detection unit 3 , a flame detection unit 2 , a processing control unit 1 , and a control element 5 .

[0050] see Figure 4 , the oxygen concentration detection unit 3, the flame detection unit 2, the processing controller 1 and the control element 5 illustrate the logical relationship between the four, in order to illustrate the principle of the present embodiment, the oxygen concentration detection unit 3 is arranged on the oxygen index measuring instrument 8 The mixing pipeline inside is used to detect the oxygen concentration and output an oxygen concentration signal that is positively correlated with the oxygen concentration to the P1.1 access port of the AT89C51 microcontroller in the processing control unit 1. Whether the sample is burning, when the flame generated during combustion is detected, the timing signal is output to the P1.2 acc...

Embodiment 2

[0058] Embodiment two, see figure 2 and Figure 4 As shown, a control method of a building material oxygen index test control system comprises the following steps,

[0059] Step 1. Measure the oxygen concentration in the oxygen index meter 8 through the oxygen concentration detection unit 3 and output an oxygen concentration signal positively correlated with the oxygen concentration;

[0060] Step 2. Use the flame detection unit 2 to detect whether the sample in the combustion tank 4 is burning. When the flame generated during combustion is detected, a timing signal is output. When the flame generated during combustion is not detected, a cut-off signal is output;

[0061] Step 3, by processing the control unit 1, start timing in response to the timing signal, and stop timing in response to the cut-off signal, so as to obtain the combustion time of a combustion test, and compare the combustion time with its internal preset time of 2 minutes;

[0062] When the combustion time...

Embodiment 3

[0068] Embodiment 3. A control method for a building material oxygen index test control system

[0069] The difference between the third embodiment and the second embodiment is that the adjustment methods are different when determining the initial limit oxygen index interval, the processing control unit 1 instructs the control element 5 to increase the oxygen concentration by a fixed increment or decrease the oxygen concentration by a fixed decrement to reach the initial limit oxygen index interval. Limiting oxygen index range.

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Abstract

The invention discloses a building material oxygen index test control system. The system comprises a control component, an oxygen concentration detection unit, a flame detection unit and a processing control unit. Under the common control action of the units, the system has advantages of more accurate measurement data and more accurate measurement results. The invention further relates to a control method of the system and a building material oxygen index tester.

Description

technical field [0001] The invention relates to the technical field of building material performance testing, in particular to a building material oxygen index test control system, control method and tester. Background technique [0002] With the continuous development and progress of society, various new building decoration materials are widely used, and these new materials use various flammable materials in the production process, which increases many fire safety hazards. Therefore, by testing the oxygen index of materials to It is very necessary to judge the combustion performance of a material. The building material oxygen index tester is used to measure the minimum oxygen concentration required to maintain the combustion of the sample in the mixed flow of oxygen and nitrogen. [0003] The oxygen index measuring instrument in the building material oxygen index test control system generally uses a 0-10 liters / minute oxygen rotameter to adjust the oxygen flow rate, and us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/042
CPCG05B19/0423G05B2219/24215
Inventor 孙治堃
Owner NANJING SHANGYUAN ANALYTICAL INSTR
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