Automatic calibration machine for smoke alarm

Abstract

The invention discloses an automatic calibration machine for a smoke alarm, and the machine comprises a case which is internally provided with a smoke cavity. The track conveying device is used for conveying the circuit board of the smoke alarm into or out of the smoke cavity; the manipulator is used for adjusting a potentiometer on the circuit board so as to calibrate the smoke alarm; the smoke generating device is used for providing smoke with preset calibration concentration for the smoke cavity; the first smoke concentration detection device is used for detecting the smoke concentration in the smoke cavity; and the controller is used for controlling the track conveying device and the smoke generating device to work, and controlling the manipulator to calibrate the smoke alarm when the smoke concentration detected by the first smoke concentration detection device is the preset calibration concentration and the circuit board is located in the smoke cavity. The invention provides an automatic calibration machine for a smoke alarm. The accuracy and efficiency of calibration can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of smoke alarms, and more particularly to an automatic calibration machine for smoke alarms. Background Art

[0002] A smoke alarm is a safety device that can detect smoke and sound an alarm. Its basic principle is to sense smoke particles, convert the optical changes caused by smoke particles into electrical signals, and then process the signals and compare them with known fire standard data to determine whether a fire has occurred, and then send out an alarm signal to remind people to take timely countermeasures.

[0003] At present, smoke alarms using analog chips are still widely used because of their stable performance, strong anti-interference ability, low cost and other advantages. However, the sensitivity of such alarms is limited, and the potentiometer on the circuit board in the alarm needs to be manually adjusted to calibrate the alarm threshold. In addition, when calibrating the sensitivity, the smoke sensing room relies on increasing the power of the transmitting tube to simulate the entry of smoke, and the sensitivity is not selected in a real smoke environment, resulting in a large discreteness of the calibrated sensitivity and poor accuracy. In addition, workers need to repeatedly confirm when operating the debugging fixture and adjusting the potentiometer, which requires a lot of operating hours. Usually, several people are required to operate together to improve production efficiency. In addition, human omissions are prone to occur, resulting in low production efficiency and unstable product quality of such smoke alarms. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides an automatic calibration machine for smoke alarms, which can improve the accuracy and efficiency of calibration.

[0005] The technical solution adopted by the present invention to solve the technical problem is: an automatic calibration machine for smoke alarms, comprising: a chassis, a smoke chamber is provided inside the chassis;

[0006] A track conveyor device for conveying the circuit board of the smoke alarm into or out of the smoke chamber;

[0007] A manipulator, used to adjust the potentiometer on the circuit board to calibrate the smoke alarm;

[0008] A smoke generating device, used for providing smoke of a preset calibration concentration to the smoke chamber;

[0009] A first smoke concentration detection device, used to detect the smoke concentration in the smoke chamber;

[0010] The controller is used to control the operation of the track conveying device and the smoke generating device, and to control the manipulator to calibrate the smoke alarm when the smoke concentration detected by the first smoke concentration detection device is a preset calibration concentration and the circuit board is located in the smoke chamber.

[0011] In a preferred technical solution, the smoke generating device includes a smoke generator, a smoke storage box and a fan unit, wherein the smoke storage box is provided with a smoke inlet fan, a smoke volume detection device and a second smoke concentration detection device; the smoke generator is connected to the smoke storage box, and the smoke storage box is connected to the smoke chamber through the smoke inlet fan; the fan unit is arranged in the smoke chamber, and a filter device is arranged on the air inlet of the smoke chamber; the controller is respectively connected to the smoke generator, the smoke inlet fan, the smoke volume detection device, the second smoke concentration detection device and the fan unit.

[0012] In a preferred technical solution, the first smoke concentration detection device includes an infrared emitting end and an infrared receiving end which are arranged on two sides of the chassis, and a filter is arranged in front of the infrared receiving end.

[0013] In a preferred technical solution, the track conveying device includes a conveying track and a bearing platform slidably arranged on the conveying track, and one or more mounting positions are arranged on the bearing platform; the mounting positions are provided with a clamp for clamping the circuit board and a probe for supplying power to the smoke alarm.

[0014] In a preferred technical solution, the manipulator includes a base and a fixed base that can move up and down along the base. A rotatable calibration rod is provided below the fixed base. The calibration rod is used to adjust the potentiometer on the circuit board to calibrate the smoke alarm.

[0015] In a preferred technical solution, the above-mentioned smoke alarm automatic calibration machine also includes a temperature and humidity adjustment device and a temperature and humidity detection device; the temperature and humidity adjustment device is used to adjust the temperature and humidity in the smoke chamber; the temperature and humidity detection device is used to detect the temperature and humidity data inside the smoke chamber and the ambient temperature and humidity data outside the chassis.

[0016] In a preferred technical solution, the smoke chamber is an elliptical annular cavity; the fan unit includes a fan bracket and a plurality of fans, the fan bracket is arranged on the cross section of the smoke chamber, and the plurality of fan arrays are distributed on the fan bracket.

[0017] In a preferred technical solution, a smoke exhaust pipe is provided on the top of the chassis, and a smoke exhaust valve is provided at the connection between the smoke exhaust pipe and the smoke chamber.

[0018] In a preferred technical solution, an observation window is provided on the chassis, and the observation window is located above the manipulator; a lighting device is provided below the observation window.

[0019] In a preferred technical solution, the above-mentioned automatic calibration machine for smoke alarms further includes a control panel, and the controller is connected to the control panel.

[0020] It can be seen from the above technical solutions that, compared with the prior art, the beneficial effects of the present invention are as follows: an automatic calibration machine for smoke alarms, by providing a smoke generating device and a first smoke concentration detection device, can accurately control the smoke concentration in the smoke chamber, so that the circuit board to be calibrated can be calibrated in a real smoke environment, and an automated manipulator is used to adjust the potentiometer, which can effectively avoid errors caused by human negligence, thereby ensuring the sensitivity and accuracy of the calibration, which is beneficial to the improvement of the quality of the smoke alarm; at the same time, an automated track conveying device is adopted, and the potentiometer is adjusted in conjunction with an automated manipulator, so that the potentiometers on one or more circuit boards can be adjusted at the same time to calibrate the sensitivity threshold, thereby greatly improving the production efficiency and helping to improve the production capacity of the alarm; in summary, the automatic calibration machine for smoke alarms can improve the production efficiency and product quality of smoke alarms.

[0021] In addition, other advantages of the present invention will be given in the following description, and some will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of the front side of the automatic calibration machine for smoke alarms of the present invention;

[0024] Figure 2 It is a schematic diagram of the overall structure of the back side of the automatic calibration machine for smoke alarms of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the track conveying device and the manipulator of the present invention;

[0026] Figure 4 It is a top view structural schematic diagram of the automatic calibration machine for smoke alarms of the present invention;

[0027] Figure 5 for Figure 4 Schematic diagram of the cross-section structure at the AA position;

[0028] Figure 6 for Figure 4 Schematic diagram of the cross-section structure at the middle BB position;

[0029] Description of reference numerals:

[0030] 1. Chassis; 2. Track conveying device; 21. Conveying track; 22. Carrying platform; 3. Manipulator; 4. First smoke concentration detection device; 5. Smoke generator; 6. Smoke storage box; 61. Smoke inlet fan; 62. Smoke volume detection device; 63. Second smoke concentration detection device; 7. Fan unit; 8. Filter device; 9. Smoke exhaust pipe; 10. Observation window; 100. Smoke chamber. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0033] Reference Figure 1-6 A smoke alarm automatic calibration machine according to an embodiment of the present invention is described.

[0034] In one embodiment, if Figure 1-6 As shown, a smoke alarm automatic calibration machine comprises:

[0035] A chassis 1, wherein a smoke chamber 100 is provided inside the chassis 1;

[0036] A track conveying device 2, used for conveying the circuit board of the smoke alarm into or out of the smoke chamber 100;

[0037] Manipulator 3, used to adjust the potentiometer on the circuit board to calibrate the smoke alarm;

[0038] A smoke generating device, used for providing smoke of a preset calibration concentration to the smoke chamber 100;

[0039] The first smoke concentration detection device 4 is used to detect the smoke concentration in the smoke chamber 100;

[0040] The controller is used to control the operation of the track conveying device 2 and the smoke generating device, and to control the manipulator 3 to calibrate the smoke alarm when the smoke concentration detected by the first smoke concentration detection device 4 is a preset calibration concentration and the circuit board is located in the smoke chamber 100.

[0041] Among them, the track conveying device 2 is arranged on the chassis 1 and can send the circuit board to be calibrated into or out of the smoke chamber 100; the manipulator 3 can be arranged on the track conveying device 2, and enter and exit the smoke chamber 100 together with the circuit board to be calibrated, or it can be fixedly installed in the smoke chamber 100, and it only needs to ensure that it is located above the circuit board during calibration, and the circuit board can be calibrated; the smoke generating device includes a smoke generator 5 and a smoke concentration control component, and the smoke concentration control component can evenly dilute the smoke generated by the smoke generator 5 and input it into the smoke chamber 100, so as to obtain smoke of a preset calibration concentration, and the preset calibration concentration is also the alarm threshold that needs to be written to the smoke alarm; the first smoke concentration detection device 4 can detect the smoke concentration in the smoke chamber 100 in real time or at preset time intervals, and send it to the controller.

[0042] During specific implementation, the controller is respectively connected to the track conveying device 2, the manipulator 3, the smoke generating device and the first smoke concentration detecting device 4 to realize the control function.

[0043] Sensitivity calibration principle of smoke alarm: The analog smoke sensor chip has an output control port. When the smoke concentration detected by the alarm exceeds the calibrated threshold, this port will output a high level. Using this function, in this embodiment, the manipulator 3 will first adjust the potentiometer on the circuit board to be calibrated to the lowest sensitivity end. When the smoke concentration in the smoke chamber 100 is at the preset calibration concentration, the manipulator 3 will gradually adjust the potentiometer slowly toward the high end of the alarm sensitivity. Once the circuit board alarm is triggered and the output control port of the smoke sensor chip has a high level output, the manipulator 3 will immediately stop adjusting. At this point, the smoke sensitivity adjustment is completed, and the calibration of the circuit board of the smoke alarm is also completed.

[0044] In this embodiment, the smoke generating device includes a smoke generator 5 and a smoke storage box 6, and the smoke storage box 6 is provided with a smoke inlet fan 61, a smoke volume detection device 62 and a second smoke concentration detection device 63;

[0045] The smoke generator 5 is connected to the smoke storage box 6, and the smoke storage box 6 is connected to the smoke chamber 100 through the smoke inlet fan 61. The smoke chamber 100 is provided with a fan unit 7 for mixing the smoke entering the smoke chamber 100 with the air evenly.

[0046] A filter device 8 is provided on the air inlet of the smoke chamber 100 for filtering the air sucked into the smoke chamber;

[0047] The controller is respectively connected to the smoke generator 5, the smoke inlet fan 61, the smoke quantity detection device 62, the second smoke concentration detection device 63 and the fan unit 7.

[0048] Among them, the smoke generator 5 is an aerosol generator that can generate smoke particles. The aerosol generator can be arranged on the chassis 1; the smoke volume detection device 62 and the second smoke concentration detection device 63 are respectively used to detect the smoke volume and smoke concentration in the smoke storage box 6; the fan unit 7 includes at least one fan for mixing smoke and air to make the smoke particles more uniform, so that the smoke concentration in the smoke chamber 100 is more uniform and stable; preferably, the fan unit 7 may include 10 to 30 fans, such as 24 fans, to enhance the mixing wind force; the filter device 8 may be provided with a filter for filtering the air sucked into the smoke chamber 100 to prevent impurities from entering the smoke chamber 100.

[0049] During the specific implementation process, the smoke generated by the smoke generator 5 first enters the smoke storage box 6 through the pipeline, and after reaching a stable density in the smoke storage box 6, it is discharged from the smoke storage box 6 into the smoke chamber 100, and then circulates in the smoke chamber 100 under the action of the fan unit 7; the first smoke concentration detection device 4 can detect the smoke concentration in the smoke chamber in real time and send the detection value to the controller; in order to provide a stable smoke output, the smoke inlet fan 61, the second smoke concentration detection device 63 and the smoke volume detection device 62 arranged in the smoke storage box 6 can, under the control of the controller, reduce or increase the amount of smoke output to the smoke chamber 100 according to the detected smoke concentration in the smoke chamber, so that it can automatically adjust to a preset smoke concentration range.

[0050] In this embodiment, the first smoke concentration detection device 4 includes an infrared emitting end and an infrared receiving end which are arranged on two sides of the chassis 1, and a filter is provided in front of the infrared receiving end to filter out interference from other visible lights, thereby improving detection accuracy.

[0051] Among them, the infrared transmitting end is the infrared transmitting tube, and the infrared receiving end is the infrared receiving head; the infrared transmitting tube will continuously emit infrared light, and the infrared receiving head will have a corresponding voltage output when it detects the infrared light. If there is smoke blocking, the infrared light received by the infrared receiving head will be reduced, and the voltage will be weakened accordingly. The controller detects this voltage value and converts it into a shading rate through an algorithm, so that the smoke concentration in the smoke chamber 100 can be detected in real time.

[0052] In specific implementation, when the first smoke concentration detection device 4 detects that the smoke concentration is too high or too low, the controller can adjust the smoke concentration by controlling the smoke generating device to stabilize the smoke concentration in the smoke chamber 100 at a preset calibration concentration. For example, the controller can control the power of the smoke generator 5 and the fan unit 7, or turn off the smoke intake fan 61 to stop the smoke intake.

[0053] The above embodiment can adjust the smoke concentration in the smoke chamber 100 more accurately and efficiently through the cooperation of the first smoke concentration detection device 4 and the controller, which is conducive to more accurate calibration of the circuit board of the smoke alarm.

[0054] In this embodiment, the track conveying device 2 includes a conveying track 21 and a carrying platform 22 slidably arranged on the conveying track, and one or more installation positions are arranged on the carrying platform 22;

[0055] The mounting position is provided with a clamp for clamping the circuit board and a probe for supplying power to the smoke alarm.

[0056] Among them, the conveying track 21 can be composed of a stepper motor, a conveyor belt, and a limit switch, and can send the carrying platform 22 into or out of the smoke chamber 100; the clamp is used to clamp the circuit board to fix its position so that it can be calibrated by the robot 3 later; when the circuit board is calibrated, the conveying track 21 will automatically send the carrying platform 22 out of the smoke chamber 100.

[0057] During specific implementation, the above-mentioned automatic calibration machine can be adapted to different models of smoke alarms by replacing different fixtures; a sensor is also provided at the mounting position corresponding to the circuit board on the fixture, and the sensor detects that the circuit board is placed in the mounting position, triggering the fixture to clamp the circuit board; the probe can be a PIN probe, which is retractable and can be set at the bottom of the mounting position.

[0058] In this embodiment, the manipulator 3 includes a base and a fixed base that can move up and down along the base. A rotatable calibration rod is provided below the fixed base. The calibration rod is used to adjust the potentiometer on the circuit board to calibrate the smoke alarm.

[0059] The fixed seat is also provided with a motor for driving the calibration rod to rotate, and the bottom end of the calibration rod is provided with a calibration rod head for docking with the potentiometer.

[0060] During specific implementation, the fixing seat moves downward to make the calibration rod head dock with the potentiometer, and then the motor drives the calibration rod to rotate so that the calibration rod head adjusts the potentiometer to achieve calibration of the smoke alarm circuit board.

[0061] In this embodiment, the above-mentioned automatic calibration machine for smoke alarms further includes a temperature and humidity adjustment device and a temperature and humidity detection device;

[0062] The temperature and humidity regulating device is used to regulate the temperature and humidity in the smoke chamber 100;

[0063] The temperature and humidity detection device is used to detect the temperature and humidity data inside the smoke chamber 100 and the ambient temperature and humidity data outside the chassis 1 .

[0064] Among them, the temperature and humidity adjustment device includes a temperature adjustment device and a humidity adjustment device, the temperature adjustment device includes a heating unit and a refrigeration unit, and the humidity adjustment device includes a humidification unit and a dehumidification unit; the temperature and humidity detection device includes a temperature detection device and a humidity detection device, the temperature detection device includes an in-box temperature detection unit located in the smoke chamber and an ambient temperature detection unit located outside the smoke chamber; the humidity detection device includes an in-box humidity detection unit located in the smoke chamber and an ambient humidity detection unit located outside the smoke chamber.

[0065] In this embodiment, the smoke chamber 100 is an elliptical annular cavity; the fan unit 7 includes a fan bracket and a plurality of fans, the fan bracket is arranged on the cross section of the smoke chamber 100, and a plurality of fan arrays are distributed on the fan bracket.

[0066] Wherein, each fan is provided with a corresponding wind speed detection device, and each wind speed detection device is connected to the controller so that the user can timely connect and control the wind speed and rotation speed of each fan.

[0067] In this embodiment, a smoke exhaust pipe 9 is provided on the top of the chassis 1 , and a smoke exhaust valve is provided at the connection between the smoke exhaust pipe 9 and the smoke chamber 100 .

[0068] In specific implementation, the automatic calibration machine for smoke alarms can exhaust smoke after completing the calibration, and the exhausted smoke is discharged from the smoke exhaust pipe 6 .

[0069] In this embodiment, an observation window 10 is provided on the chassis 1 , and the observation window 10 is located above the manipulator 3 ; a lighting device is provided below the observation window 10 .

[0070] The observation window 10 is used to observe the calibration operation in the smoke chamber 100, and a lighting device is provided below for more convenient observation.

[0071] In this embodiment, the automatic calibration machine for smoke alarms further includes a control panel, and the controller is connected to the control panel.

[0072] During specific implementation, the control panel can be used to display data such as smoke concentration, temperature and humidity, and wind speed in the smoke chamber 100 .

[0073] Other structures and operations of the automatic calibration machine for smoke alarms according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.

[0074] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0075] In the description of this specification, the reference terms "embodiment", "specific embodiment", "example" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention.

[0076] In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined with each other in any one or more embodiments or examples in a suitable manner without interference or contradiction.

Claims

1. A smoke alarm automatic calibration machine, characterized in that: include: A chassis (1), wherein a smoke chamber (100) is provided inside the chassis (1); A track conveying device (2) for conveying a circuit board of a smoke alarm into or out of the smoke chamber (100); A manipulator (3) for adjusting a potentiometer on the circuit board to calibrate the smoke alarm; A smoke generating device, used for providing smoke of a preset calibrated concentration to the smoke chamber (100); A first smoke concentration detection device (4) for detecting the smoke concentration in the smoke chamber (100); A controller is used to control the operation of the track conveying device (2) and the smoke generating device, and to control the manipulator (3) to calibrate the smoke alarm when the smoke concentration detected by the first smoke concentration detection device (4) is the preset calibration concentration and the circuit board is located in the smoke chamber (100).

2. The automatic calibration machine for smoke alarms according to claim 1, characterized in that: The smoke generating device comprises a smoke generator (5) and a smoke storage box (6), wherein the smoke storage box (6) is provided with a smoke inlet fan (61), a smoke quantity detection device (62) and a second smoke concentration detection device (63); The smoke generator (5) is connected to the smoke storage box (6), and the smoke storage box (6) is connected to the smoke chamber (100) through the smoke inlet fan (61). A fan unit (7) is arranged in the smoke chamber (100), and a filter device (8) is arranged on the air inlet of the smoke chamber (100); The controller is respectively connected to the smoke generator (5), the smoke inlet fan (61), the smoke volume detection device (62), the second smoke concentration detection device (63) and the fan unit (7).

3. The automatic calibration machine for smoke alarms according to claim 2, characterized in that: The first smoke concentration detection device (4) comprises an infrared emitting end and an infrared receiving end which are arranged on two sides of the chassis (1) relative to each other, and a filter is arranged at the front of the infrared receiving end.

4. The automatic calibration machine for smoke alarms according to claim 2, characterized in that: The track conveying device (2) comprises a conveying track (21) and a bearing platform (22) slidably arranged on the conveying track, and one or more mounting positions are arranged on the bearing platform (22); The installation position is provided with a clamp for clamping the circuit board and a probe for supplying power to the smoke alarm.

5. The automatic calibration machine for smoke alarms according to claim 4, characterized in that: The manipulator (3) comprises a base and a fixed seat that can move up and down along the base, and a rotatable calibration rod is provided below the fixed seat, and the calibration rod is used to adjust the potentiometer on the circuit board to calibrate the smoke alarm.

6. The automatic calibration machine for smoke alarms according to any one of claims 2 to 5, characterized in that: It also includes a temperature and humidity regulating device and a temperature and humidity detecting device; The temperature and humidity regulating device is used to regulate the temperature and humidity in the smoke chamber (100); The temperature and humidity detection device is used to detect the internal temperature and humidity data in the smoke chamber (100) and the ambient temperature and humidity data outside the chassis (1).

7. The automatic calibration machine for smoke alarms according to claim 6, characterized in that: The smoke chamber (100) is an elliptical annular cavity; the fan unit (7) comprises a fan bracket and a plurality of fans, the fan bracket is arranged on the cross section of the smoke chamber (100), and the plurality of fan arrays are distributed on the fan bracket.

8. The automatic calibration machine for smoke alarms according to claim 7, characterized in that: A smoke exhaust pipe (9) is provided on the top of the chassis (1), and a smoke exhaust valve is provided at the connection point between the smoke exhaust pipe (9) and the smoke chamber (100).

9. The automatic calibration machine for smoke alarms according to claim 2, characterized in that: The chassis (1) is provided with an observation window (10), and the observation window (10) is located above the manipulator (3); and a lighting device is provided below the observation window (10).

10. The automatic calibration machine for smoke alarms according to claim 2, characterized in that: A control panel is also included, and the controller is connected to the control panel.

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