A detection device and method for measuring the holding time of a tobacco filling value measuring instrument

Abstract

A detection device and method for measuring the holding time of a tobacco filling value measuring instrument. The detection device includes a current transmitter, a controller, a switching power supply, a display screen, a power inlet, a power outlet, and a housing. The device can monitor the changes in the current of the tobacco filling value measuring instrument during testing, automatically and accurately identify each current mutation point, start and end timing at the corresponding mutation point, and measure the holding time accordingly, thereby determining whether the tobacco filling value measuring instrument meets the holding time standard. The device of the present invention has a simple structure, is easy to control, and can eliminate human factors. It has high measurement accuracy and reliability and is applicable to the detection of the holding time of tobacco filling value measuring instruments from different manufacturers. It is also applicable to the detection of the holding time of instruments with similar structures and principles driven by motors, such as tobacco elasticity measuring instruments.

Description

Technical Field

[0001] The present invention is applied to the detection of the holding time of a filling value measuring instrument, specifically a detection device for measuring the holding time of a tobacco filling value measuring instrument, and provides a detection method using the device of the present invention. Background Art

[0002] The tobacco filling value tester is a test instrument used in the tobacco industry to test the filling capacity of tobacco. The instrument uses a motor to drive the pressure head to press down, applying a specified pressure to the tobacco sample and maintaining the pressure for a certain period of time, which is the holding time. Under the action of pressure, the height of the tobacco surface will decrease over time. When the pressure is completed, the height of the tobacco surface after pressure is measured and the filling value is finally calculated. The accuracy of the holding time is an important parameter to test whether the instrument is qualified.

[0003] Currently, the holding time of tobacco filling value measuring instruments is controlled by the instrument's own controller. The timing accuracy of the controllers of filling value measuring instruments produced by different manufacturers may also vary. Metering personnel are required to test their timing accuracy to ensure that they meet the holding time standards and ensure the reliability of the filling value test results. The current method of holding time testing mainly relies on the tester to observe the instrument movement and the position of the pressure head and operate the stopwatch to time. Affected by environmental and human factors, it is easy to cause inaccurate measurement of the holding time. During the filling value test process, if the holding time is inaccurate, the final height of the tobacco surface will be inaccurate, which will affect the accuracy of the final filling value. Therefore, there is a need for a detection device that allows metrology personnel to accurately detect the holding time of the filling value measuring instrument to ensure that the instrument meets the standards. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems and provide a detection device for measuring the holding time of a tobacco filling value measuring instrument. The device determines the starting and ending points of the pressure application timing by detecting the changes in current when the tobacco filling value measuring instrument is running, and then calculates the holding time.

[0005] The object of the present invention is achieved through the following technical solutions:

[0006] A detection device for measuring the pressure holding time of a tobacco filling value measuring instrument comprises a current transmitter, a controller, a switching power supply, a display screen, a power supply inlet, a power supply output port and a housing, wherein the current transmitter, the controller and the switching power supply are arranged inside the housing, the display screen, the power supply inlet and the power supply output port are all embedded in the housing, the power supply inlet is used for connecting to an external 220V power supply, and the power supply output port is connected to the power port of the tobacco filling value measuring instrument to provide power for the normal operation of the tobacco filling value measuring instrument.

[0007] The switching power supply is a voltage and current conversion device that converts AC to DC; the switching power supply converts 220V AC power into DC power, providing DC power for the controller, operation panel, and current transmitter.

[0008] The power output port, the current transmitter and the power input port are in series circuit relationship.

[0009] The detection device supplies power to the tobacco filling value meter through the current transmitter. The current transmitter collects the current value of the tobacco filling value meter in real time. The signal output end of the current transmitter is connected to the controller to transmit the current value of the tobacco filling value meter in real time. The controller transmits the data signal to the display screen to display the current value of the tobacco filling value meter in real time.

[0010] The power input port provides 220V AC power to the tobacco filling value measuring instrument through the current transmitter and the power output port.

[0011] The method for measuring the holding time of a tobacco filling value measuring instrument using the detection device of the present invention is to detect the real-time change of the current of the tobacco filling value measuring instrument through the current transmitter in the detection device, automatically and accurately identify each current mutation point, and start and end timing at the corresponding mutation point, thereby measuring the holding time as an indicator for judging whether the holding time of the tobacco filling value measuring instrument is qualified (meets the standard).

[0012] The working mechanism of this method is as follows: when the tobacco filling value meter is tested, the pressure head will move up and down driven by the motor. Each time the motor starts, the current value will increase, and the current value will have an upward mutation. Each time the motor stops moving, the current value will decrease, and the current value will have a downward mutation. The controller of the detection device enters the ready state and counts according to the mutation point of the current, so as to detect the pressure holding time of the tobacco filling value meter.

[0013] The specific steps are as follows:

[0014] a. The power input port of the detection device is connected to a 220V power supply, the tobacco filling value measuring instrument power cord is inserted into the power output port of the detection device, then the detection device and the tobacco filling value measuring instrument are powered on to work properly;

[0015] b. When the test of the tobacco filling value measuring instrument begins, the pressure head moves downward driven by the motor. At this time, the current transmitter detects that the current value of the tobacco filling value measuring instrument increases instantly, and there will be an upward mutation. When the upward mutation is detected, the controller starts to enter the preparation state;

[0016] c. When the pressure head of the tobacco filling value measuring instrument is pressed down to the specified position, the motor stops moving. At this time, the current value instantly decreases and there will be a downward mutation. When the downward mutation is detected, the controller starts timing;

[0017] d. When the 30-second holding time of the tobacco filling value measuring instrument's pressure head is completed, the motor drives the pressure head to move upward. At this time, the current value increases instantly, and there will be a sudden upward change. When the upward sudden change occurs, the controller stops timing;

[0018] e. After the controller finishes timing, it will calculate the holding time of the tobacco filling value measuring instrument and record it on the display screen, and the speed measurement is completed.

[0019] Determine whether the holding time of the tobacco filling value measuring instrument meets the standard based on the displayed holding time.

[0020] The present invention's device features a simple structure, easy control, and the elimination of human error, improving measurement accuracy and reliability. It is also suitable for measuring the dwell time of motor-driven instruments with similar structures and principles, such as tobacco elasticity testers.

[0021] The outstanding feature of the detection method of the present invention is that the timing start point and the timing end point are determined by monitoring the current change of the tobacco filling value measuring instrument, and finally the pressure holding time is obtained.

[0022] The beneficial effect of the present invention is that the current of the instrument will suddenly change at the moment when the pressure head of the tobacco filling value measuring instrument starts to move and stops moving. The detection device can accurately identify the occurrence of current mutation and use it as the starting point and end point of timing. The detected holding time is scientific and accurate, with small error and good repeatability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the device,

[0024] Figure 1 Among them, 1-housing, 2-display screen, 3-power input port, 4-power output port, 5, controller, 6-switching power supply, 7-current transmitter, 8-tobacco filling value measuring instrument.

[0025] Figure 2 The timing diagram of the device is shown in Figure 2.

[0026] Figure 2 In the figure, 9 is the current upward mutation point, 10 is the current downward mutation point, 11 is the current upward mutation point, and 12 is the pressure holding time period.

[0027] Figure 3 The schematic diagram of the device circuit is shown in Figure 2.

[0028] Figure 3In the circuit, 220V electricity is connected to the power input port to provide 220V power for the switching power supply. The switching power supply provides DC power for the controller, operation screen, and current transmitter. The power input port and the current transmitter, power output port, and filling value meter are in series in the circuit. The power input port supplies 220V AC power to the filling value meter through the current transmitter and the power output port. The current signal detected by the current transmitter is transmitted to the controller, and the controller displays the result on the display screen. DETAILED DESCRIPTION

[0029] The present invention will now further describe the composition and circuit connection relationship of the device in conjunction with the accompanying drawings:

[0030] like Figure 1 As shown: A detection device for measuring the holding time of a tobacco filling value measuring instrument, comprising a current transmitter 7, a controller 5, a switching power supply 6, a display screen 2, a power supply inlet 3, a power output port 4 and a housing 1, wherein the current transmitter 7, the controller 5, and the switching power supply 6 are arranged inside the housing 1, and the display screen 2, the power supply inlet 3, and the power output port 4 are all embedded in the housing 1, the power supply inlet 3 is used to connect to an external 220V power supply, and the power output port 4 is connected to the power port of the tobacco filling value measuring instrument 8 to provide power for the normal operation of the tobacco filling value measuring instrument.

[0031] like Figure 3 As shown: the power input port 3 is connected to the 220V power supply, the switching power supply 6 is an AC-to-DC transformer and current converter, which converts the 220V AC power into DC power to provide DC power for the controller 5, the display screen 2, and the current transmitter 7. The power cord of the tobacco filling value meter 8 is connected to the power output port 4. The power output port 4 and the current transmitter 7 and the power input port 3 are in series in the circuit. The detection device of the present invention powers the tobacco filling value meter 8 through the current transmitter 7. The current transmitter 7 is used to collect the current value of the tobacco filling value meter 8 in real time. The signal output end of the current transmitter 7 is connected to the controller 5 to transmit the current value of the tobacco filling value meter in real time. The display screen 2 displays the current value of the tobacco filling value meter in real time.

[0032] The working process is described as follows with reference to the accompanying drawings:

[0033] Connect the power input port 3 of the detection device to a 220V power supply, and insert the power cord of the tobacco filling value measuring instrument 8 into the power output port 4 of the detection device. At this time, the detection device and the tobacco filling value measuring instrument 8 are both powered on and work normally.

[0034] The test of the tobacco filling value measuring instrument 8 begins. The pressure head moves downward driven by the motor. At this time, the current transmitter detects that the current value of the tobacco filling value measuring instrument increases instantly. Figure 2There will be a current upward mutation point 9. When the current upward mutation point 9 is detected, the controller 5 begins to enter the ready state.

[0035] When the pressure head of the tobacco filling value measuring instrument 8 is pressed down to the specified position, the motor stops moving. At this time, the current value becomes smaller instantly, and there will be a current downward mutation point 10. When the current downward mutation point 10 is detected, the controller 5 starts timing.

[0036] When the tobacco filling value measuring instrument 8 pressure head presses down and maintains pressure for 30 seconds, the motor drives the pressure head to move upward. At this time, the current value increases instantly, and there will be a current upward mutation point 11. When the current upward mutation point 11 is detected, the controller 5 completes the timing.

[0037] After the controller 5 completes the timing, it will calculate the holding time 12 of the tobacco filling value measuring instrument and record and display it on the display screen, and the speed measurement is completed.

[0038] By comparing the obtained holding time 12 with the standard holding time, it is determined whether the holding time of the tobacco filling value measuring instrument is accurate, thereby testing whether the instrument is qualified.

Claims

1. A detection device for measuring the holding time of a tobacco filling value measuring instrument, characterized in that: The detection device includes a current transmitter, a controller, a switching power supply, a display screen, a power supply inlet, a power supply outlet, and a housing, wherein the current transmitter, the controller, and the switching power supply are arranged inside the housing, and the display screen, the power supply inlet, and the power supply outlet are installed on the housing. The power supply inlet is used to connect to an external 220V power supply, and the power supply outlet is connected to the power supply port of the tobacco filling value measuring instrument to provide power for the normal operation of the tobacco filling value measuring instrument; the power supply outlet, the current transmitter, and the power supply inlet are in series circuit relationship; the current transmitter in the detection device detects the real-time change of the current of the tobacco filling value measuring instrument, automatically and accurately identifies each current mutation point, and starts and ends timing at the corresponding mutation point, thereby measuring the pressure holding time as an indicator for judging whether the pressure holding time of the tobacco filling value measuring instrument is qualified; The detection device powers the tobacco filling value meter through a current transmitter. The current transmitter collects the current value of the tobacco filling value meter in real time. The signal output end of the current transmitter is connected to the controller to transmit the current value of the tobacco filling value meter in real time. The controller transmits the data signal to the display screen to display the current value of the tobacco filling value meter in real time.

2. The detection device for measuring the holding time of a tobacco filling value measuring instrument according to claim 1, characterized in that: The switching power supply is a voltage and current conversion device for converting AC to DC.

3. The detection device for measuring the holding time of a tobacco filling value measuring instrument according to claim 1 or 2, characterized in that: The switching power supply converts 220V AC power into DC power, providing DC power for the controller, operation screen, and current transmitter.

4. The detection device for measuring the holding time of a tobacco filling value measuring instrument according to claim 1, characterized in that: The power input port provides 220V AC power to the tobacco filling value measuring instrument through the current transmitter and the power output port.

5. The detection device for measuring the holding time of a tobacco filling value measuring instrument according to claim 1, characterized in that: The display screen, power inlet and power outlet are all embedded in the housing.

6. A method for measuring the holding time of a tobacco filling value measuring instrument using the detection device according to claim 1, characterized in that: The current transmitter in the detection device detects the real-time changes in the current of the tobacco filling value meter, automatically and accurately identifies each current mutation point, and starts and ends timing at the corresponding mutation point. The pressure holding time is measured accordingly, which serves as an indicator to judge whether the pressure holding time of the tobacco filling value meter is qualified.

7. The method for measuring the holding time of a tobacco filling value measuring instrument according to claim 6, characterized in that: The working mechanism of this method is as follows: when the tobacco filling value meter is tested, the pressure head will move up and down driven by the motor. Each time the motor starts, the current value will increase, and the current value will have an upward mutation. Each time the motor stops moving, the current value will decrease, and the current value will have a downward mutation. The controller of the detection device enters the ready state and counts according to the mutation point of the current, so as to detect the pressure holding time of the tobacco filling value meter.

8. The method for measuring the holding time of a tobacco filling value measuring instrument according to claim 6, characterized in that: The specific steps are as follows: a. The power input port of the detection device is connected to a 220V power supply, the tobacco filling value measuring instrument power cord is inserted into the power output port of the detection device, then the detection device and the tobacco filling value measuring instrument are powered on to work properly; b. When the test of the tobacco filling value measuring instrument begins, the pressure head moves downward driven by the motor. At this time, the current transmitter detects that the current value of the tobacco filling value measuring instrument increases instantly, and there will be an upward mutation. When the upward mutation is detected, the controller starts to enter the preparation state; c. When the pressure head of the tobacco filling value measuring instrument is pressed down to the specified position, the motor stops moving. At this time, the current value instantly decreases and there will be a downward mutation. When the downward mutation is detected, the controller starts timing; d. When the 30-second holding time of the tobacco filling value measuring instrument's pressure head is completed, the motor drives the pressure head to move upward. At this time, the current value increases instantly, and there will be a sudden upward change. When the upward sudden change occurs, the controller stops timing; e. After the controller finishes timing, it will calculate the holding time of the tobacco filling value meter and record it on the display screen, and the test is completed.

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