A pulse signal detection system for flow sensor

Abstract

The present invention discloses a pulse signal detection system for a flow sensor, comprising a housing, a single-chip microcomputer control panel, a control switch module, a quality indicator module, and a pumping module disposed on the housing; several sets of positioning mechanisms disposed on the housing, a water collecting box, and a weighing module for weighing the water collecting box and processing weighing data; the positioning mechanism secures the flow sensor to form a detection pipe, the water inlet of the detection pipe being connected to the pumping module via a pumping pipe, and the water collecting box being capable of receiving water discharged from the water outlet of the detection pipe; the control switch module, quality indicator module, pumping module, and weighing module are all electrically connected to the single-chip microcomputer control panel. The pulse signal detection system provided by the present invention can simultaneously detect multiple flow sensors, continuously test the flow sensors, and has high detection accuracy and efficiency.

Description

Technical Field

[0001] The present invention relates to the field of quality detection of flow sensors, and in particular to a pulse signal detection system of a flow sensor. Background Art

[0002] Currently, most PLC controllers on the market are used to perform quality inspections on the pulse signals of flow sensors. Since PLC controllers cannot filter out external interference, interference will affect the product signal, resulting in inaccurate flow detection. In addition, the entire circuit wiring is complex and costly.

[0003] Moreover, the existing flow sensor pulse signal detection device has a complicated detection process and can only perform a single test on a product, resulting in low detection efficiency and delays in production progress.

[0004] It can be seen that the existing technology still needs to be improved and enhanced. Summary of the Invention

[0005] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a pulse signal detection system for a flow sensor, which is intended to test multiple flow sensors simultaneously and improve detection efficiency and accuracy.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A pulse signal detection system for a flow sensor comprises a housing, a single-chip microcomputer control panel, a control switch module, a quality indication module, and a pumping module arranged on the housing, several groups of positioning mechanisms arranged on the housing, a water collecting box, and a weighing module for weighing the water collecting box and processing weighing data; the positioning mechanism fixes the flow sensor to form a detection pipeline, the water inlet of the detection pipeline is connected to the pumping module via a pumping pipeline, and the water collecting box can receive water discharged from the water outlet of the detection pipeline; the control switch module, the quality indication module, the pumping module, and the weighing module are all electrically connected to the single-chip microcomputer control panel.

[0008] Each group of the positioning mechanism includes a drain seat, a positioning seat, and a cylinder that are sequentially distributed on the outer wall of the box body. The end of the piston rod of the cylinder is provided with a water inlet seat. The water inlet seat is provided with a first water inlet and a first water outlet. The drain seat is provided with a second water inlet and a second water outlet. The flow sensor is installed on the positioning seat. The cylinder is used to drive the water inlet seat to move toward the flow sensor, so that the first water outlet on the water inlet seat is connected to the water inlet pipe on the flow sensor, and the water outlet pipe of the flow sensor is connected to the second water inlet of the drain seat.

[0009] The second water outlet of the drain seat is connected to a drain pipe, and the first water inlet of the water inlet seat is connected to the pumping module through the pumping pipe. Sealing rings are provided at the first water outlet of the water inlet seat and the second water inlet of the drain seat.

[0010] The pumping module includes a water tank and several water pumps. The water inlet end of each water pump is connected to the water tank, the outlet end of the water pump is connected to the corresponding first water inlet through the pumping pipe, and the control end of the water pump is electrically connected to the single-chip microcomputer control panel.

[0011] The weighing module includes a weighing seat, a weighing sensor arranged on the weighing seat, and a weighing data processing submodule installed on a single chip microcomputer.

[0012] The water collecting box is provided with an upper opening, the box body is provided with a drainage cavity, the weighing seat is arranged above the drainage cavity through a support plate, a rotating shaft is provided at the bottom of the water collecting box, and a receiving seat is respectively provided on both sides of the water collecting box, and the two ends of the rotating shaft are respectively rotatably connected to the two receiving seats.

[0013] The pulse signal detection system of the flow sensor also includes a water pouring drive cylinder for pushing the water collecting box to pour over and a pneumatic switch pneumatically connected to the water pouring drive cylinder.

[0014] The quality indication module includes a display screen, which is electrically connected to the single-chip microcomputer control panel.

[0015] The quality indication module also includes a qualified product indicator light and a unqualified product alarm indicator light.

[0016] The control switch module includes a start button and a stop button.

[0017] Beneficial effects:

[0018] This invention provides a pulse signal detection system for flow sensors. Compared to existing technologies, this system utilizes a single-chip microcomputer control panel as a controller, offering superior resistance to external interference and improving the accuracy of finished product testing. Furthermore, it provides multiple test stations, enabling automated and simultaneous testing of multiple flow sensors, significantly improving testing efficiency and achieving a high degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of the pulse signal detection system of the flow sensor provided by the present invention.

[0020] Figure 2 This is a front view of the positioning mechanism in the pulse signal detection system of the flow sensor provided by the present invention.

[0021] Figure 3 This is an assembly diagram of the water collecting box in the pulse signal detection system of the flow sensor provided by the present invention. DETAILED DESCRIPTION

[0022] The present invention provides a pulse signal detection system for a flow sensor. To make the objectives, technical solutions, and effects of the present invention more clear and explicit, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0023] See also Figure 1-Figure 3 The present invention provides a pulse signal detection system for a flow sensor, comprising a box body 1, a single-chip microcomputer control panel 2, a control switch module 3, a quality indication module 4, and a pumping module 5 arranged on the box body 1, several groups of positioning mechanisms 6, a water collecting box 7, and a weighing module 8 for weighing the water collecting box and processing weighing data arranged on the box body; the positioning mechanism 6 fixes the flow sensor to form a detection pipeline, the water inlet of the detection pipeline is connected to the pumping module 5 through a pumping pipeline 53, and the water collecting box 7 can receive water discharged from the water outlet of the detection pipeline; the control switch module 3, the quality indication module 4, the pumping module 5, and the weighing module 8 are all electrically connected to the single-chip microcomputer control panel.

[0024] Because the single-chip control panel detects the pulse signal, those skilled in the art can install anti-interference components (such as capacitors and inductors) on the single-chip control panel to effectively filter out external interference, preventing interference sources from affecting the finished product pulse signal and causing inaccurate finished product detection. In addition, the single-chip control panel has the advantages of easy control, simple structure, and low cost.

[0025] A set of positioning mechanisms 6, water collection boxes 7, and weighing modules 8 are combined to form a test station. In this embodiment, four test stations are provided, but the present invention does not limit the number of test stations, and different numbers of test stations are also within the scope of protection of the present invention. During operation, the worker places the flow sensor A on the positioning mechanism 6, and then activates the control switch module 3 to completely position the flow sensor A on the positioning mechanism 6. The single-chip control panel 2 controls the pumping module 5 to pump water from the detection pipe for a short time (for example, 3 seconds) and then stops working to ensure that the air in the detection pipe is completely exhausted. During this process, water will flow from the water outlet of the detection pipe into the water collection box 7. At this time, the weighing module 8 records the first total weight of the water collection box and the water contained in the water collection box at that time. Then the pumping module 5 starts again to start the formal pumping test. When the flow sensor A is working, the water flow will drive the impeller in the flow sensor A to rotate, so that the flow sensor sends a pulse signal. For example, if the impeller of the flow sensor rotates one circle, one gram of water will flow out, and one pulse signal will be sent out for one circle. Then 100 pulse signals represent that the weight of the flowing water is 100 grams, and the water flow rate of 100 grams is the water volume measured by the number of pulses. The water volume pumped during the formal test is determined by the pulse count set by the microcontroller control panel 2. When the microcontroller receives pulses from the flow sensor that reach the set number (to ensure test accuracy, the pulse count is preferably set to at least 100), the pumping mechanism 5 stops pumping. At this point, the weighing module 8 records the second total weight of the water collection box and the water contained therein at that time. The water weight of the formal test is calculated as: the second total weight minus the first total weight. If the water volume of the formal test falls within the set qualified water flow weight range, the product is deemed qualified; otherwise, it is deemed unqualified. After obtaining the determination result, the microcontroller control panel 2 feeds the test result of the finished product to the staff via the quality indicator module. Finally, the flow sensor A is removed and replaced with a new one for testing. The water storage capacity of the water collection box is generally designed to be full after five tests. Therefore, the pulse signal detection system provided by the present invention can continuously test the flow sensor, eliminating the need to drain the water from the water collection box after each test, thereby improving testing efficiency.

[0026] For details, please refer to Figure 1 and Figure 2Each group of the positioning mechanism 6 includes a drain seat 61, a positioning seat 62, and a cylinder 63, which are sequentially distributed on the outer wall of the box body. The end of the piston rod of the cylinder is provided with a water inlet seat 64, and the water inlet seat is provided with a first water inlet 65 and a first water outlet 66. The drain seat 61 is provided with a second water inlet 67 and a second water outlet 68. The flow sensor A is installed on the positioning seat 62. The cylinder 63 is used to drive the water inlet seat 64 to move toward the flow sensor, so that the first water outlet 66 on the water inlet seat 64 is connected to the water inlet pipe A1 on the flow sensor A, and the water outlet pipe A2 of the flow sensor is connected to the second water inlet 67 of the drain seat 61. During operation, the flow sensor A is installed on the positioning seat 62, and the water outlet pipe of the flow sensor is inserted into the second water inlet 67 of the drain seat to realize the radial positioning of the flow sensor. Then the cylinder 63 drives the water inlet seat 64 to move toward the flow sensor A, so that the water inlet pipe A1 of the flow sensor is inserted into the first water outlet 66 of the water inlet seat, thereby forming the detection pipeline. The water inlet of the detection pipeline is the first water inlet 65 of the water inlet seat, and the water outlet of the detection pipeline is the second water outlet 68 of the drain seat.

[0027] Preferably, see Figure 2 The second water outlet 68 of the drain seat 61 is connected to a drain pipe 69. The first water inlet 65 of the water inlet seat is connected to the pumping module 5 via the pumping pipe 53. Seals 60 are provided at both the first water outlet 66 of the water inlet seat and the second water inlet 67 of the drain seat to ensure a tight seal. The provision of drain pipe 69 ensures that all water used during the testing process is drained into the water collection box 7, preventing leakage that could cause inaccurate testing.

[0028] For details, please refer to Figure 1 The pumping module 5 includes a water tank 51 and several water pumps 52. The water inlet of each pump 52 is connected to the water tank 51, and the outlet of each pump is connected to the corresponding first water inlet 65 via the pumping pipe. The control end of the water pump is electrically connected to the single-chip control panel 2. Each water pump corresponds to a detection station. When the number of pulses sent by the flow sensor received by the single-chip control panel reaches the set number of pulses, all controlled water pumps stop pumping, ensuring precise and reliable control.

[0029] Preferably, the weighing module 8 includes a weighing base 81, a weighing sensor 82 mounted on the weighing base, and a weighing data processing submodule 83 mounted on a single-chip microcomputer. The weighing data processing submodule is responsible for calculating the first total weight and the second total weight, and then calculating the difference between the first total weight and the second total weight to obtain the water consumption for the formal test. Finally, the determination control code in the single-chip microcomputer control panel compares the water consumption of the formal test with the set qualified water flow range. The weighing data processing submodule is specifically a control program code pre-burned into the single-chip microcomputer control panel by a staff member.

[0030] Preferably, see Figure 3 The water collecting box 7 has an upper opening, and the housing 1 is provided with a drainage chamber 11. The weighing seat 81 is arranged above the drainage chamber 11 via a support plate 12. A rotating shaft 71 is provided at the bottom of the water collecting box 7. Two opposing receiving seats 72 are provided on either side of the water collecting box 7. The ends of the rotating shaft 71 are rotatably connected to the two receiving seats 72. When the water in the water collecting box 7 is almost full, the water collecting box 7 can be manually lifted and flipped around the rotating shaft 71 to pour out the water. The water collecting box can then be lowered back into its original position to continue filling with water. This is simple to operate and greatly saves labor.

[0031] Preferably, see Figure 3 The pulse signal detection system of the flow sensor provided by the present invention also includes a pouring drive cylinder 73 for pushing the water collecting box to tip over, and a pneumatic switch 74 pneumatically connected to the pouring drive cylinder. Each test station is correspondingly provided with a set of pouring drive cylinders and pneumatic switches. The cylinder switch is set on the box body. The two ends of the pouring drive cylinder are hinged to the support plate and the water collecting box respectively. When the staff turns on the pneumatic switch, the piston rod of the pouring drive cylinder extends, driving the water collecting box 7 to lift up, so that the water collecting box flips around the rotating axis and automatically pours water into the drainage chamber. When the pneumatic switch is turned off, the pouring drive cylinder drives the water collecting box to reset to the weighing platform. Through such a setting, the labor of workers pouring water is reduced and the automation level of the equipment is improved.

[0032] For details, please refer to Figure 1 The quality indication module 4 includes a display screen 41, which is electrically connected to the single-chip control panel 2. Workers can learn the total number of flow sensors and the results of each test based on the display screen.

[0033] Preferably, see Figure 1 The quality indicator module 4 also includes a qualified product indicator light 42 and a non-qualified product warning indicator light 43. Each group of test stations corresponds to a set of qualified product indicator lights 42 and non-qualified product warning indicator lights 43. Workers can intuitively understand the qualified quality judgment results of the finished products based on the lights emitted by the qualified product indicator lights and non-qualified product warning indicator lights, thereby improving inspection efficiency.

[0034] For details, please refer to Figure 1, the control switch module 3 also includes a start button 31 and a stop button 32. The start button 31 and the stop button 32 are both electrically connected to the single-chip computer control panel 2. After the staff presses the start button 31, the pulse signal detection system automatically completes the detection steps until the detection is completed; if the stop button is pressed during the detection process, it will be temporarily detected. In the above control steps of this embodiment, there are two groups of start buttons 31 and stop buttons 32, and each group of start buttons 31 and stop buttons 32 corresponds to controlling two test stations. Through such a setting, when two groups of test stations are testing, the other two groups of test stations can disassemble, assemble and replace the flow sensor, thereby improving the detection efficiency.

[0035] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all such changes or substitutions should fall within the scope of protection of the present invention.

Claims

1. A pulse signal detection system for a flow sensor, characterized in that: The invention comprises a box body, a single-chip microcomputer control panel, a control switch module, a quality indication module, and a pumping module arranged on the box body, several groups of positioning mechanisms, a water collecting box, and a weighing module for weighing the water collecting box and processing weighing data arranged on the box body; the positioning mechanism fixes the flow sensor to form a detection pipeline, the water inlet of the detection pipeline is connected to the pumping module through the pumping pipeline, and the water collecting box can receive water discharged from the water outlet of the detection pipeline; the control switch module, the quality indication module, the pumping module, and the weighing module are all electrically connected to the single-chip microcomputer control panel; each group of the positioning mechanisms includes A drainage seat, a positioning seat, and a cylinder are sequentially arranged on the outer wall of the box body. A water inlet seat is provided at the end of the piston rod of the cylinder. The water inlet seat is provided with a first water inlet and a first water outlet. The drainage seat is provided with a second water inlet and a second water outlet. The flow sensor is installed on the positioning seat. The cylinder is used to drive the water inlet seat to move toward the flow sensor so that the first water outlet on the water inlet seat is connected to the water inlet pipe on the flow sensor, and the water outlet pipe of the flow sensor is connected to the second water inlet of the drainage seat; the pumping module includes a water tank and several water pumps. The water inlet end of each water pump is connected to the water tank, and the outlet end of the water pump is connected to the water tank. The water pump is connected to the corresponding first water inlet through the water pumping pipe, and the control end of the water pump is electrically connected to the single-chip control panel; the weighing module includes a weighing seat, a weighing sensor arranged on the weighing seat, and a weighing data processing submodule installed on the single-chip microcomputer; the water collecting box is provided with an upper opening, the box body is provided with a drainage cavity, the weighing seat is arranged above the drainage cavity through a support plate, a rotating shaft is provided at the bottom of the water collecting box, and a receiving seat is respectively provided on both sides of the water collecting box, and the two ends of the rotating shaft are rotatably connected to the two receiving seats; it also includes a pouring drive cylinder for pushing the water collecting box to tip over and a gas connected to the pouring drive cylinder. The pneumatic switch is dynamically connected; the quality indication module includes a display screen, which is electrically connected to the single-chip control panel; the quality indication module also includes a qualified product indicator light and a non-qualified product alarm indicator light; the flow sensor is placed on the positioning mechanism, and then the control switch module is started to make the positioning mechanism completely position the flow sensor. The single-chip control panel controls the pumping module to pump water from the detection pipeline for a short time and then stops working to ensure that the air in the detection pipeline is completely exhausted and water flows from the water outlet of the detection pipeline into the water collection box. At this time, the weighing module records the first total weight of the water collection box and the water contained in the water collection box at this time point;The pumping module then restarts to begin the formal pumping test. When the flow sensor is operating, the water flow drives the impeller inside the flow sensor, causing it to emit a pulse signal. When the microcontroller receives a set number of pulses from the flow sensor, it controls the pumping mechanism to stop pumping. The weighing module then records the second total weight of the water collection box and the water contained therein at that point in time. The formal test water weight = the second total weight minus the first total weight. If the formal test water volume falls within the set acceptable water flow weight range, the product is deemed qualified; otherwise, it is deemed unqualified. The microcontroller control panel receives the test result and transmits it to the staff through the quality indicator module.

2. The pulse signal detection system of the flow sensor according to claim 1, characterized in that: The second water outlet of the drain seat is connected to a drain pipe, and the first water inlet of the water inlet seat is connected to the pumping module through the pumping pipe. Sealing rings are provided at the first water outlet of the water inlet seat and the second water inlet of the drain seat.

3. The pulse signal detection system of the flow sensor according to claim 1, characterized in that: The control switch module includes a start button and a stop button.

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