System and method for testing multi-dimensional performance of point type smoke detector

Abstract

The invention provides a multi-dimensional performance test system and method for a point type smoke detector. The method comprises the following steps: S1, adjusting a smoke box before test; the adjustment before measurement comprises the steps of cleaning residual smoke in the box and adjusting the rotating speed of each fan; and S2, measuring different parameters by using a point type smoke detector multi-dimensional performance test system, and outputting a measurement result. The test system provided by the invention can test the multi-dimensional performance of the point-type smoke detector, and comprehensively assesses the performance of the detector by simulating smoke conditions in various actual environments; the test comprises a detector sensitivity stability test under different wind speeds, a sensitivity change test of the point-type smoke detector under a chimney effect, and air velocity change anti-interference performance detection without smoke, so that the reliability and safe operation of a fire alarm system are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of performance testing of point-type smoke detectors, and in particular to a multi-dimensional performance testing system and method for point-type smoke detectors. Background Art

[0002] Point-type smoke detectors are a type of fire detector that is widely used at present, and their early warning effect is remarkable. According to statistics, point-type smoke detectors can detect more than 70% of fire incidents. However, such detectors are easily affected by environmental factors, such as dust accumulation, which leads to false alarms and affects their normal operation. Therefore, the performance parameters of point-type smoke detectors, such as sensitivity, reliability, and anti-interference and anti-false alarm performance, are particularly important. These parameters directly affect the operation of the entire fire protection system and the safety of people's lives and property. Based on the principles of people-oriented, priceless life, and reducing property losses, false alarms should be reduced as much as possible, and ensure that alarms can be issued faster when a real fire occurs. Therefore, the performance parameters of point-type smoke detectors should be uniformly standardized and strictly tested, and more rigorous, scientific and multi-faceted performance testing methods should be adopted. The performance of point-type smoke detectors directly affects the response effect of the automatic fire alarm system, so strict testing of their performance is essential.

[0003] The present invention proposes a multi-dimensional performance detection method for point-type smoke detectors, aiming to conduct a comprehensive performance test and evaluation on point-type smoke detectors. Summary of the invention

[0004] In view of the defects in the prior art, an object of the present invention is to provide a multi-dimensional performance testing system and method for point-type smoke detectors.

[0005] A multi-dimensional performance test system for a point-type smoke detector provided by the present invention comprises:

[0006] Stack effect simulator, smoke box and control and measurement system;

[0007] The chimney effect simulation device comprises a fan, a rectangular box and a detector mounting base;

[0008] The smoke box includes a smoke generator, a controllable airflow circulation fan, a rear exhaust fan, an optical smoke density meter, an ion smoke concentration measuring instrument and a detector mounting bracket;

[0009] The detector mounting base and the detector mounting bracket are used to install and fix the detector;

[0010] The chimney effect simulation device is connected to the smoke box;

[0011] The smoke box and the chimney effect simulation device are both connected to the control and measurement system.

[0012] Preferably, the controllable airflow circulation fan includes a first controllable airflow circulation fan and a second controllable airflow circulation fan.

[0013] A multi-dimensional performance test method for a point-type smoke detector provided by the present invention includes:

[0014] Step S1: Adjust the smoke box before testing;

[0015] The pre-test adjustment includes cleaning the residual smoke in the box and adjusting the speed of each fan;

[0016] Step S2: Use the point-type smoke detector multi-dimensional performance test system to measure different parameters and output the measurement results.

[0017] Preferably, step S1 includes the following sub-steps:

[0018] Step S1.1: Start the tail exhaust fan to clean the remaining smoke in the smoke box;

[0019] Step S1.2: Start the ion smoke concentration measuring instrument and the optical smoke density meter;

[0020] Step S1.3: After the residual smoke is cleaned, turn off the tail exhaust fan;

[0021] Step S1.4: Start the smoke box and the control and measurement system, and call up the window;

[0022] Step S1.5: Use an anemometer to test the wind speed inside the smoke box to keep the wind speed within the preset range.

[0023] Preferably, the wind speed inside the smoke box is maintained within a preset range by adjusting the first controllable airflow circulation fan and the second controllable airflow circulation fan.

[0024] Preferably, step S2 includes the following sub-steps:

[0025] Step S2.1: Record and measure the sensitivity data of the point-type smoke detector;

[0026] Step S2.2: Record and measure the detector sensitivity stability data at different wind speeds;

[0027] Step S2.3: Record and measure the sensitivity change data of the point-type smoke detector under the chimney effect;

[0028] Step S2.4: Record the anti-interference performance data of the detector measuring the change of air flow rate in the absence of smoke.

[0029] Preferably, the step S2.1 includes the following sub-steps:

[0030] Step S2.1.1: Install the point-type smoke detector to be tested on the detector mounting base in the smoke box and power it on for preheating;

[0031] Step S2.1.2: setting the parameters of the control and measurement system, starting the tail exhaust fan to exhaust the smoke box, until the ion smoke concentration measuring instrument and the optical smoke density meter show that there is no smoke in the smoke box;

[0032] Step S2.1.3: Adjust the wind speed, measure and control the wind speed on one side of the middle end of the detector;

[0033] Step S2.1.4: Light the cotton rope and put it into the smoke generator;

[0034] Step S2.1.5: adjusting the smoke generator so that the smoke can reach the preset position;

[0035] Step S2.1.6: Introduce smoke and observe the duration of the detector alarm signal;

[0036] Step S2.1.7: Record the reading of the ion smoke concentration meter and the reading of the optical smoke density meter at the alarm time;

[0037] The reading of the ion smoke concentration meter is the sensitivity value of the ion smoke detector, and the reading of the optical smoke density meter is the sensitivity value of the photoelectric smoke detector;

[0038] Step S2.1.8: Clean the smoke box and complete the test.

[0039] Preferably, the step S2.2 includes the following sub-steps:

[0040] Step S2.2.1: Install the point-type smoke detector to be tested on the detector mounting base in the smoke box and power it on for preheating;

[0041] The detector should be installed in the direction where smoke is least likely to enter the detector;

[0042] Step S2.2.2: Set the initial parameters of the control and measurement system, start the tail exhaust fan to exhaust the smoke box, and make the ion smoke concentration meter and the optical smoke density meter display clear;

[0043] Step S2.2.3: Adjust the wind speed, measure and control the wind speed on one side of the middle end of the detector, and maintain different wind speed conditions;

[0044] Step S2.2.4: Light the cotton rope and put it into the smoke generator;

[0045] Step S2.2.5: adjusting the smoke generator so that the smoke can reach the preset position;

[0046] Step S2.2.6: Introduce smoke and observe the duration of the detector alarm signal;

[0047] Step S2.2.7: enabling the control and measurement system to automatically record the readings of the ion smoke concentration meter and the optical smoke density meter;

[0048] Step S2.2.8: Clean the smoke box and complete the test.

[0049] Preferably, the step S2.3 includes the following sub-steps:

[0050] Step S2.3.1: Test and record the sensitivity data of the sample to be tested;

[0051] Step S2.3.2: Install the point-type smoke detector to be tested on the detector mounting base at the bottom of the chimney effect test box, facing downward;

[0052] Step S2.3.3: Place an anemometer on the top of the test box, and adjust the fan of the chimney effect simulation device through the control and measurement system to keep the free airflow at the center of the base hole at a certain speed;

[0053] Step S2.3.4: Place the chimney effect simulation device at the opening above the smoke box;

[0054] Step S2.3.5: Start the fan to perform sensitivity test;

[0055] Step S2.3.6: Remove the chimney effect simulation device, test the sensitivity of the sample again, record the data, and compare the data changes before and after.

[0056] Preferably, the step S2.4 includes the following sub-steps:

[0057] Step S2.4.1: Install the detector on the detector mounting base and start the wind speed change program;

[0058] The wind speed variation program can set the air flow speed to vary within a certain range and perform periodic testing;

[0059] Step S2.4.2: Observe whether the detector generates false alarms during the entire test period. If not, it is determined that the detector has the ability to resist interference from changes in air velocity.

[0060] Compared with the prior art, the present invention has the following beneficial effects:

[0061] 1. The test system provided by the present invention can test the multi-dimensional performance of point-type smoke detectors and comprehensively evaluate the performance of detectors by simulating smoke conditions in various actual environments; the tests include the stability test of detector sensitivity at different wind speeds, the sensitivity change test of point-type smoke detectors under the chimney effect, and the anti-interference performance test of air flow rate changes in the absence of smoke, thereby ensuring the reliability of the fire alarm system and its safe operation.

[0062] 2. The test process of this test system is measured and controlled by the smoke box, control and measurement system, which can automatically record the test results. It is easy to operate, has complete measurement parameters and high accuracy, and can better test the multi-dimensional performance of point-type smoke detectors.

[0063] 3. The method of the present invention is applicable to different types of point-type smoke detectors and has good practical value and promotion prospects. It can test the influence of the chimney effect on the sensitivity of point-type smoke detectors, and the operation is simple and intuitive, easy to implement, and has high credibility.

[0064] Other beneficial effects of the present invention will be explained in the specific implementation manner through the introduction of specific technical features and technical solutions. Through the introduction of these technical features and technical solutions, those skilled in the art should be able to understand the beneficial technical effects brought about by the technical features and technical solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0066] Figure 1 It is a structural schematic diagram of the multi-dimensional performance detection system of the point-type smoke detector of the present invention.

[0067] Figure 2 It is a structural schematic diagram of the chimney effect simulation device of the present invention.

[0068] Figure 3 The present invention is a flow chart of the method.

[0069] Reference numerals

[0070] Chimney effect simulation device 1 Smoke generator 201

[0071] Smoke box 2 First controllable airflow circulation fan 202

[0072] Control and measurement system 3 Optical smoke density meter 203

[0073] Fan 101 Ion smoke concentration meter 204

[0074] Rectangular box 102 Detector mounting bracket 205

[0075] Detector mounting base 103 Second controllable airflow circulation fan 206

[0076] Rear exhaust fan 207 DETAILED DESCRIPTION

[0077] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0078] Reference Figure 1 and Figure 2 As shown, a multi-dimensional performance test system for point-type smoke detectors includes:

[0079] Chimney effect simulation device 1, smoke box 2 and control and measurement system 3;

[0080] The chimney effect simulation device 1 comprises a fan 101, a rectangular box 102 and a detector mounting base 103;

[0081] The smoke box 2 includes a smoke generator 201, a controllable airflow circulation fan, a rear exhaust fan 207, an optical smoke density meter 203, an ion smoke concentration measuring instrument 204 and a detector mounting bracket 205;

[0082] The detector mounting base 103 and the detector mounting bracket 205 are used to install and fix the detector;

[0083] The chimney effect simulation device 1 is connected to the smoke box 2;

[0084] The smoke box 2 and the chimney effect simulation device 1 are both connected to a control and measurement system 3 .

[0085] Reference Figure 3 As shown in the figure, after the point-type smoke detector multi-dimensional performance test system is connected and assembled, different parameter tests are performed on the point-type smoke detector. The specific steps are as follows:

[0086] Step 1: Measure the sensitivity of the point-type smoke detector:

[0087] Install the point-type smoke detector to be tested on the detector mounting base 103 in the smoke box 2, and power it on for preheating;

[0088] Set up the control and measurement system 3 and start the tail exhaust fan 207 to exhaust the smoke box 2, and finally ensure that the ion smoke concentration measuring instrument 204 and the optical smoke density meter 203 show that there is no smoke in the smoke box 2;

[0089] Adjust wind speed, measure and control wind speed in front of the middle end of the detector;

[0090] Light the cotton rope and put it into the smoke generator 201 after lighting;

[0091] Adjust the smoke generator 201 to ensure that the smoke position meets the requirements;

[0092] Let in smoke and observe the duration of the detector alarm signal;

[0093] Record the readings of the ion smoke concentration meter 204 and the optical smoke density meter 203 at the alarm time. The reading of the ion smoke concentration meter 204 is the sensitivity value of the ion smoke detector, and the reading of the optical smoke density meter 203 is the sensitivity value of the photoelectric smoke detector;

[0094] Clean smoke box 2 and end the experiment.

[0095] Step 2: Detector sensitivity stability test at different wind speeds

[0096] Install the point-type smoke detector to be tested on the detector mounting base 103 in the smoke box 2, with the detector installed in a direction that is least conducive to smoke entering the detector, and power it on for preheating;

[0097] Set up the data acquisition control and measurement system 3 and start the tail exhaust fan 207 to exhaust the smoke box 2 and ensure that the ion smoke concentration measuring instrument 204 and the optical smoke density meter 203 are in a clear display state;

[0098] Adjust the wind speed, measure and control the wind speed in front of the middle end of the detector, and maintain different wind speed conditions;

[0099] Light the cotton rope and put it into the smoke generator 201 after lighting;

[0100] Adjust the smoke generator 201 to ensure that the smoke position meets the requirements;

[0101] Let in smoke and observe the duration of the detector alarm signal;

[0102] The control and measurement system 3 automatically records the readings of the ion smoke concentration meter 204 and the optical smoke density meter 203;

[0103] Clean smoke box 2 and end the experiment.

[0104] Step 3: Test the sensitivity change of point-type smoke detectors under the chimney effect:

[0105] First test the sensitivity of the two samples to be tested and record the data;

[0106] The point-type smoke detector to be tested is installed on the detector mounting base 103 at the bottom of the chimney effect simulation device 1, facing downward, to simulate the detector being installed in a building with a chimney effect after a fire occurs, such as an atrium, a shaft, or a stairwell;

[0107] An anemometer is placed on the top of the test box, and the fan 101 of the chimney effect simulation device 1 is adjusted by the control and measurement system 3 so that the free air flow velocity at the center of the base hole is 1.52 m / s.

[0108] The chimney effect simulation device 1 is placed at the upper opening of the smoke box 2;

[0109] Start the fan 101 to perform a sensitivity test;

[0110] Remove the chimney effect simulation device 1, test the sensitivity of the two samples again, record the data, and compare the data changes before and after.

[0111] Step 4: Test the anti-interference performance of air velocity changes without smoke

[0112] Install the detector on the detector mounting base 103 and start the wind speed change program;

[0113] Air flow rate variation program: Set the air flow rate to vary between 0 and a certain wind speed, and perform several cycles of testing.

[0114] Observe whether the detector generates false alarms during the entire test period. If the detector does not generate false alarms, it is considered that the detector has the performance to resist the interference of air velocity changes.

[0115] The above is a basic embodiment of the present invention. The technical solution of the present invention is further described below through a preferred embodiment.

[0116] Example 1

[0117] Reference Figure 1 and Figure 2 As shown, a multi-dimensional performance detection system for point-type smoke detectors includes:

[0118] Chimney effect simulation device 1, smoke box 2 and control and measurement system 3;

[0119] The chimney effect simulation device 1 comprises a fan 101, a rectangular box 102 and a detector mounting base 103;

[0120] The smoke box 2 includes a smoke generator 201, a controllable airflow circulation fan, a rear exhaust fan 207, an optical smoke density meter 203, an ion smoke concentration measuring instrument 204 and a detector mounting bracket 205;

[0121] The detector mounting base 103 and the detector mounting bracket 205 are used to install and fix the detector;

[0122] The chimney effect simulation device 1 is connected to the smoke box 2;

[0123] The smoke box 2 and the chimney effect simulation device 1 are both connected to a control and measurement system 3 .

[0124] In this embodiment, the smoke box is first prepared for detection, and the steps are as follows:

[0125] a) Start the tail exhaust fan 207 to clean the residual smoke in the smoke box 2.

[0126] b) Start the ion smoke concentration measuring instrument 204 and the optical smoke density meter 203.

[0127] c) After cleaning the residual smoke in the smoke box, turn off the rear exhaust fan 207.

[0128] d) Start the smoke box 2 control and measurement control and measurement system 3 and call out the window.

[0129] e) Use an anemometer to test the wind speed inside the smoke box 2 to keep the wind speed at 0.16±0.01 m / s. If it is not within the range, adjust the first controllable airflow circulation fan 202 and the second controllable airflow circulation fan 206.

[0130] After completing the above steps, the detection system can measure the following parameters:

[0131] 1. Measure the sensitivity of point-type smoke detectors:

[0132] The detector is mounted on the detector mounting base 103 in the smoke box 2 and powered on for 16 hours.

[0133] The control and measurement system 3 is turned on to start the measurement. The tail exhaust fan 207 is turned on to exhaust the smoke box 2, and the airflow is stabilized for at least 30 seconds until the ion smoke concentration measuring instrument 204 and the optical smoke density meter 203 show that the smoke box is in a clear state.

[0134] The control and measurement system 3 is operated by the smoke box 2 to adjust the wind speed so that the wind speed near the detector under test is maintained at 0.16±0.01m / s.

[0135] Light the cotton rope with an open flame, and after the flame goes out, smolder steadily for 30 seconds before placing the cotton rope into the combustible material placement tube and clamping it in place.

[0136] Observe the curves of the optical smoke density meter 203 and the ion smoke concentration meter 204 on the interface of the control and measurement system 3 to ensure that the smoke concentration shows a gradually increasing trend.

[0137] Continue to introduce smoke until the detector sends out an alarm signal continuously for 5 seconds.

[0138] The reading of the ion smoke concentration measuring instrument 204 and the reading of the optical smoke density meter 203 at the alarm time are recorded. The reading of the ion smoke concentration measuring instrument 204 is the sensitivity value of the ion smoke detector, and the reading of the optical smoke density meter 203 is the sensitivity value of the photoelectric smoke detector.

[0139] Remove the remaining cotton rope, extinguish the smoldering fire, open the smoke exhaust valve and smoke box hatch of smoke box 2, and clear the smoke in smoke box 2.

[0140] 2. Detector sensitivity stability test at different wind speeds

[0141] The detector is mounted on the detector mounting base 103 in the smoke box 2, with the detector being mounted in a direction that is least likely for smoke to enter the detector, and powered on for 16 hours.

[0142] The data acquisition control and measurement system 3 is turned on to start measurement. The tail exhaust fan 207 is turned on to exhaust the smoke box 2, and the airflow is stabilized for at least 30 seconds until the ion smoke concentration measuring instrument 204 and the optical smoke density meter 203 show that the smoke box 2 is in a clear state.

[0143] The control and measurement system 3 is operated by the smoke box 2 to adjust the wind speed so that the wind speed near the detector under test is maintained at 0.16±0.01m / s and 1.52 / m respectively.

[0144] Light the cotton rope with an open flame, and after the flame goes out, smolder steadily for 30 seconds before placing the cotton rope into the combustible material placement tube and clamping it in place.

[0145] Observe the curves of the optical smoke density meter 203 and the ion smoke concentration meter 204 on the interface of the data acquisition control and measurement system 3 to ensure that the smoke concentration shows a gradually increasing trend.

[0146] Continue to introduce smoke until the detector sends out an alarm signal continuously for 5 seconds.

[0147] Recording alarm moment The control and measurement system 3 automatically records the readings of the ion smoke concentration meter 204 and the optical smoke density meter 203 .

[0148] Remove the remaining cotton rope, extinguish the smoldering fire, open the smoke exhaust valve and smoke box hatch of smoke box 2, and clear the smoke in smoke box 2.

[0149] Compare and analyze the sensitivity changes under two wind speeds.

[0150] 3. Test on sensitivity change of point-type smoke detector under chimney effect

[0151] First test the sensitivity of the two samples and record the data.

[0152] The detector is installed at the bottom of the chimney effect simulation device 1, facing downward, and covering the hole at the bottom of the chimney effect simulation device 1, so as to simulate the working condition of the detector being installed on the ceiling.

[0153] Place the anemometer in the top of the chimney effect test chamber, adjust the circulation fan so that the free air velocity at the center of the base hole is 1.52 m / s, and then turn off the fan.

[0154] The chimney effect simulation device 1 is placed in the opening of the modified top door of the smoke box 2.

[0155] The fan 101 is turned on to perform a sensitivity test.

[0156] The chimney effect simulation device 1 is removed, and the sensitivity of the two samples is tested again, and the data is recorded.

[0157] 4. Anti-interference performance test of air velocity change in the absence of smoke

[0158] Install the detector on the detector mounting base 103, and start the wind speed change program to change the air flow speed;

[0159] The air velocity change procedure is as follows: the air velocity changes from 0-1.5m / s for 10 cycles, and the wind velocity change time for each cycle is no more than 8s. In each cycle, the maximum air velocity lasts for 15 minutes and then is closed for 15 minutes to observe whether false alarms are generated.

[0160] If there is no false alarm, it is considered that the detector under test has the ability to resist interference from changes in air velocity.

[0161] Those skilled in the art know that, in addition to realizing the system and its various devices, modules, and units provided by the present invention in a purely computer-readable program code, it is entirely possible to realize the same functions in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, the system and its various devices, modules, and units provided by the present invention can be considered as a hardware component, and the devices, modules, and units included therein for realizing various functions can also be regarded as structures within the hardware component; the devices, modules, and units for realizing various functions can also be regarded as both software modules for realizing the method and structures within the hardware component.

[0162] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A multi-dimensional performance test system for point-type smoke detectors, characterized in that: include: A chimney effect simulation device (1), a smoke box (2) and a control and measurement system (3); The chimney effect simulation device (1) comprises a fan (101), a rectangular box (102) and a detector mounting base (103); The smoke box (2) comprises a smoke generator (201), a controllable airflow circulation fan, a rear exhaust fan (207), an optical smoke density meter (203), an ion smoke concentration measuring instrument (204) and a detector mounting bracket (205); The detector mounting base (103) and the detector mounting bracket (205) are used to mount and fix the detector; The chimney effect simulation device (1) is connected to the smoke box (2); The smoke box (2) and the chimney effect simulation device (1) are both connected to a control and measurement system (3).

2. The multi-dimensional performance test system for point-type smoke detectors according to claim 1 is characterized in that: The controllable airflow circulation fan comprises a first controllable airflow circulation fan (202) and a second controllable airflow circulation fan (206).

3. A method for testing the multi-dimensional performance of a point-type smoke detector, based on the multi-dimensional performance testing system for a point-type smoke detector according to any one of claims 1 to 2, characterized in that: include: Step S1: performing pre-test adjustment on the smoke box (2); The pre-test adjustment includes cleaning the residual smoke in the box and adjusting the speed of each fan; Step S2: Use the point-type smoke detector multi-dimensional performance test system to measure different parameters and output the measurement results.

4. The multi-dimensional performance testing method of point-type smoke detectors according to claim 3 is characterized in that: The step S1 comprises the following sub-steps: Step S1.1: Start the tail exhaust fan (207) to clean the remaining smoke in the smoke box (2); Step S1.2: starting the ion smoke concentration measuring instrument (204) and the optical smoke density meter (203); Step S1.3: After the residual smoke is cleaned, the tail exhaust fan (207) is turned off; Step S1.4: Start the smoke box (2) and the control and measurement system (3), and call up the window; Step S1.5: Use an anemometer to test the wind speed inside the smoke box (2) to ensure that the wind speed remains within a preset range.

5. The multi-dimensional performance testing method of point-type smoke detectors according to claim 4 is characterized in that: The wind speed inside the smoke box (2) is maintained within a preset range by adjusting the first controllable airflow circulation fan (202) and the second controllable airflow circulation fan (206).

6. The multi-dimensional performance testing method of point-type smoke detectors according to claim 3 is characterized in that: The step S2 comprises the following sub-steps: Step S2.1: Record and measure the sensitivity data of the point-type smoke detector; Step S2.2: Record and measure the detector sensitivity stability data at different wind speeds; Step S2.3: Record and measure the sensitivity change data of the point-type smoke detector under the chimney effect; Step S2.4: Record the anti-interference performance data of the detector measuring the change of air flow rate in the absence of smoke.

7. The multi-dimensional performance testing method of point-type smoke detectors according to claim 6 is characterized in that: The step S2.1 comprises the following sub-steps: Step S2.1.1: Install the point-type smoke detector to be tested on the detector mounting base (103) in the smoke box (2), and power it on for preheating; Step S2.1.2: setting the parameters of the control and measurement system (3), starting the rear exhaust fan (207) to exhaust the smoke box (2), until the ion smoke concentration measuring instrument (204) and the optical smoke density meter (203) indicate that there is no smoke in the smoke box (2); Step S2.1.3: Adjust the wind speed, measure and control the wind speed on one side of the middle end of the detector; Step S2.1.4: Light the cotton rope and put it into the smoke generator (201); Step S2.1.5: adjusting the smoke generator (201) so that the smoke can reach a preset position; Step S2.1.6: Introduce smoke and observe the duration of the detector alarm signal; Step S2.1.7: recording the reading of the ion smoke concentration measuring instrument (204) and the reading of the optical smoke density meter (203) at the alarm time; The reading of the ion smoke concentration measuring instrument (204) is the sensitivity value of the ion smoke detector, and the reading of the optical smoke density meter (203) is the sensitivity value of the photoelectric smoke detector; Step S2.1.8: Clean the smoke box (2) and complete the test.

8. The multi-dimensional performance testing method of point-type smoke detectors according to claim 6 is characterized in that: The step S2.2 includes the following sub-steps: Step S2.2.1: Install the point-type smoke detector to be tested on the detector mounting base (103) in the smoke box (2), and power it on for preheating; The detector should be installed in the direction where smoke is least likely to enter the detector; Step S2.2.2: setting the initial parameters of the control and measurement system (3), starting the tail exhaust fan (207) to exhaust the smoke box (2), and making the ion smoke concentration measuring instrument (204) and the optical smoke density meter (203) in a clear display state; Step S2.2.3: Adjust the wind speed, measure and control the wind speed on one side of the middle end of the detector, and maintain different wind speed conditions; Step S2.2.4: Light the cotton rope and put it into the smoke generator (201); Step S2.2.5: adjusting the smoke generator (201) so that the smoke can reach a preset position; Step S2.2.6: Introduce smoke and observe the duration of the detector alarm signal; Step S2.2.7: enabling the control and measurement system (3) to automatically record the readings of the ion smoke concentration measuring instrument (204) and the optical smoke density meter (203); Step S2.2.8: Clean the smoke box (2) and complete the test.

9. The multi-dimensional performance testing method of point-type smoke detectors according to claim 6, characterized in that: The step S2.3 includes the following sub-steps: Step S2.3.1: Test and record the sensitivity data of the sample to be tested; Step S2.3.2: Install the point-type smoke detector to be tested on the detector mounting base (103) at the bottom of the chimney effect simulation device (1), facing downward; Step S2.3.3: placing an anemometer on the top of the test box, and adjusting the fan (101) of the chimney effect simulation device (1) through the control and measurement system (3) so that the free airflow at the center of the base hole maintains a certain speed; Step S2.3.4: placing the chimney effect simulation device (1) at the opening above the smoke box (2); Step S2.3.5: Start the fan (101) to perform a sensitivity test; Step S2.3.6: Remove the chimney effect simulation device (1), test the sensitivity of the sample again, record the data, and compare the data changes before and after.

10. The multi-dimensional performance testing method of point-type smoke detectors according to claim 6, characterized in that: The step S2.4 comprises the following sub-steps: Step S2.4.1: Mount the detector on the detector mounting base (103) and start the wind speed change program; The wind speed variation program can set the air flow speed to vary within a certain range and perform periodic testing; Step S2.4.2: Observe whether the detector generates false alarms during the entire test period. If not, it is determined that the detector has the ability to resist interference from changes in air velocity.

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