A device and method for pressure testing of a smart catering weighing scale

Abstract

The present invention discloses a device and method for pressure testing of a weighing device applicable to smart catering, including a host computer, a controller, an EUT weighing device, a circulation device and an external force simulation device, characterized in that: the host computer communicates with the controller in a serial port manner, the controller is electrically connected to the EUT weighing device, the controller is electrically connected to the circulation device, and the controller is electrically connected to the external force simulation device. The present invention relates to the field of smart catering, and specifically, to a device and method for pressure testing of a weighing device applicable to smart catering. The present invention facilitates the stability testing of the weighing device in the self-service mode of smart catering.

Description

Technical Field

[0001] The present invention relates to the field of smart catering. Specifically, it relates to a device and method for pressure testing of a weighing device suitable for smart catering. Background Art

[0002] With the application of AI technology in the catering field, the self-service model of smart catering with face brushing for self-service meal taking and weighing has become the choice of many current restaurants. The product billing of the self-service model of smart catering relies on the weighing and metering function. When a customer selects meals in a weighing food warmer, the weight of the taken meals is weighed, and the price of the taken meals is calculated to achieve on-demand meal taking and automatic checkout for the customer. Therefore, for the weighing device used in smart catering products, its long-term working reliability and stability are an important indicator of the self-service model of smart catering.

[0003] However, in actual applications, long-term weighing, touching, human interference during meal taking, and impacts during meal serving will affect the structure and performance of the weighing device, thereby reducing the weighing accuracy. Therefore, for manufacturers producing this type of smart catering, how to test the stability of the weighing function of the selected weighing device and thus ensure reliable weighing during meal taking is an important problem to be solved. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a device and method for pressure testing of a weighing device suitable for smart catering, which is convenient for stability testing of the weighing device in the self-service model of smart catering.

[0005] The present invention adopts the following technical solutions to achieve the invention purpose:

[0006] A device for pressure testing of a weighing device suitable for smart catering includes a host computer, a controller, an EUT weighing device, a circulation device, and an external force simulation device. The characteristics are that: the host computer communicates with the controller in a serial port manner, the controller is electrically connected to the EUT weighing device, the controller is electrically connected to the circulation device, and the controller is electrically connected to the external force simulation device.

[0007] As a further limitation of this technical solution, the circulation device includes a container, an extraction device, an injection device, a storage device, and four sections of pipelines. The controller is electrically connected to the extraction device and the controller is electrically connected to the injection device.

[0008] As a further limitation of this technical solution, the first section of the pipeline connects the extraction device and the container, the second section of the pipeline connects the extraction device and the storage device, the third section of the pipeline connects the injection device and the storage device, and the fourth section of the pipeline connects the injection device and the container.

[0009] As a further limitation of this technical solution, the EUT weighing device is fixedly connected to the container.

[0010] As a further limitation of this technical solution, the external force simulation device includes a PWM current control module, a multi-way switch, and an electromagnet group. The controller is electrically connected to the PWM current control module, the controller is electrically connected to the multi-way switch, the electromagnet group is electrically connected to the PWM current control module, and the electromagnet group is electrically connected to the multi-way switch.

[0011] As a further limitation of this technical solution, the electromagnet group is composed of multiple electromagnets respectively fixedly connected to the four sides of the container.

[0012] A method applicable to the pressure test of a smart catering weighing scale, characterized by comprising the following steps:

[0013] Step 1: According to the volume and weight of the container above the EUT weighing scale, determine the lower threshold and upper threshold of the dish weight for the operating parameters. Based on the big data of the self-service meal-taking time, determine the meal-taking duration T. Based on the big data of the service staff's dish-serving time, determine the dish-adding time T. The upper computer sends the operating parameters to the controller;

[0014] Step 2: The controller collects the dish weight above the EUT weighing scale and controls the operation of the circulation device. If the dish weight above the EUT weighing scale is less than the lower threshold of the dish weight, the injection device works, and the liquid in the storage device is injected into the container according to the dish-adding mode to simulate the impact on the EUT weighing scale during dish-adding. After dish-adding, ensure that the dish weight above the EUT weighing scale is greater than or equal to the upper threshold of the dish weight. If the dish weight above the EUT weighing scale is greater than the lower threshold of the dish weight, the extraction device works, simulating meal-taking with a cycle of the meal-taking duration T, extracting a certain flow rate Q of the liquid in the container to the storage device until it is less than the lower threshold of the dish weight, where Q = the weight of each meal G / the meal-taking duration T;

[0015] Step 3: The controller outputs a PWM wave, controls the output current magnitude through the PWM current control module, controls the multi-way switch to close and turn off by the controller, and further controls one or more electromagnets of the electromagnet group to work and output the magnetic force magnitude, thereby changing the magnitude of the force on the container to simulate the interference of the weight above the EUT weighing scale during manual meal-taking, with a duration of t, where t is less than the meal-taking duration T;

[0016] Step 4: The controller collects the weight change of the EUT weighing scale at the millisecond level and uploads it to the upper computer, forming a change curve and a database data log through software programming to statistically analyze the stability of the weighing scale under long-term operation of the EUT weighing scale.

[0017] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0018] 1. The present device provides a feasible device and method for pressure testing of intelligent catering weighing scales for manufacturers of intelligent catering self-service models. The device can operate automatically, perform long-term weighing tests on intelligent catering, collect weighing data, form a database backup on the host computer, and display curves, visually presenting the test results to achieve the purpose of verifying the stability of the weighing scale.

[0019] 2. The present device realizes automatic control, can perform long-term verification tests on intelligent catering weighing scales, is easy to operate, and realizes the stability test of the weighing scale in the intelligent catering self-service model. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the present invention.

[0021] Figure 2 is a partial flow chart of the device of the present invention.

[0022] Figure 3 is a circuit structure diagram of the present invention.

[0023] In the figure: 1. Host computer, 2. Controller, 3. EUT weighing scale, 4. Container, 5. Extraction device, 6. Injection device, 7. Storage device, 8. Pipeline, 9. External force simulation device, 10. PWM control current module, 11. Multiplexer, 12. Electromagnet group. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] The following will describe in detail a specific embodiment of the present invention with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.

[0025] As Figures 1-3 shown, the present invention includes a host computer 1, a controller 2, an EUT weighing scale 3, a circulation device, and an external force simulation device 9. The host computer 1 communicates with the controller 2 through a serial port. The controller 2 is electrically connected to the EUT weighing scale 3, the controller 2 is electrically connected to the circulation device, and the controller 2 is electrically connected to the external force simulation device 9.

[0026] The host computer 1 communicates with the controller 2 through a serial port. The controller 2 is electrically connected to the EUT weighing scale 3, the controller 2 is electrically connected to the circulation device, and the controller 2 is electrically connected to the external force simulation device 9.

[0027] The circulation device includes a container 4, an extraction device 5, an injection device 6, a storage device 7, and four sections of pipelines 8. The controller 2 is electrically connected to the extraction device 5, and the controller 2 is electrically connected to the injection device 6.

[0028] The pipeline 8 described in the first paragraph connects the extraction device 5 and the container 4. The pipeline 8 described in the second paragraph connects the extraction device 5 and the storage device 7. The pipeline 8 described in the third paragraph connects the injection device 6 and the storage device 7. The pipeline 8 described in the fourth paragraph connects the injection device 6 and the container 4.

[0029] The EUT weighing device 3 is fixedly connected to the container 4.

[0030] The external force simulation device 9 includes a PWM current control module 10, a multiplexer 11, and an electromagnet group 12. The controller 2 is electrically connected to the PWM current control module 10. The controller 2 is electrically connected to the multiplexer 11. The electromagnet group 12 is electrically connected to the PWM current control module 10. The electromagnet group 12 is electrically connected to the multiplexer 11.

[0031] The electromagnet group 12 is composed of a plurality of electromagnets respectively fixedly connected to the four sides of the container 4.

[0032] A method applicable to the pressure test of a smart catering weighing device includes the following steps:

[0033] Step 1: According to the volume and weight of the container 4 above the EUT weighing device 3, determine the lower threshold value of the dish weight and the upper threshold value of the dish weight of the operating parameters. Supported by the big data of the self-service meal-taking time, determine the meal-taking duration T. Supported by the big data of the serving time of the service staff, determine the dish-adding time T1. The host computer 1 sends the operating parameters to the controller 2.

[0034] Step 2: The controller 2 collects the dish weight above the EUT weighing device 3 and controls the operation of the circulation device. If the dish weight above the EUT weighing device 3 is less than the lower threshold value of the dish weight, the injection device 6 works, and the liquid in the storage device 7 is injected into the container 4 according to the dish-adding mode to simulate the impact on the EUT weighing device 3 during dish-adding. After dish-adding, ensure that the dish weight above the EUT weighing device 3 is greater than or equal to the upper threshold value of the dish weight. If the dish weight above the EUT weighing device 3 is greater than the lower threshold value of the dish weight, the extraction device 5 works, simulating meal-taking at a cycle of the meal-taking duration T, and extracting a certain flow rate Q of the liquid in the container 4 to flow to the storage device 7 until it is less than the lower threshold value of the dish weight. Q = the weight of each meal-taking G / the meal-taking duration T.

[0035] Step 3: The controller 2 outputs a PWM wave, controls the output current magnitude through the PWM current control module 10, controls the closing and shutting of the multi-way switch 11, and further controls the operation of one or more electromagnets in the electromagnet group 12 and the output magnetic force magnitude, thereby changing the magnitude of the force exerted on the container 4, so as to simulate the interference of the weight above the EUT weighing scale 3 during manual meal taking. The duration is t, and t is less than the meal taking duration T.

[0036] Step 4: The controller 2 collects the weight change of the EUT weighing scale 3 at the millisecond level and uploads it to the host computer 1, and forms a change curve and database data log through software programming to statistically analyze the stability of the weighing scale of the EUT weighing scale 3 during long-term operation.

[0037] The operating parameters set by the host computer 1 include: the lower limit threshold of the dish weight, the upper limit threshold of the dish weight, the meal taking duration, the dish adding mode, etc. The controller can control the operation of the device according to the operating parameters.

[0038] The extraction device 5 is used to extract the liquid in the container 4 and flow it to the storage device 7 to simulate the reduction of the dish weight.

[0039] The injection device 6 is used to inject the liquid inside the storage device 7 into the container 4 to simulate the increase of the dish weight.

[0040] Under the control of the controller 2, the external force simulation device 9 changes the current magnitude of the electromagnet group 12, changes the force exerted by the electromagnet group 12 on the container 4, the magnitude of the force is adjustable, and the directions include horizontal and vertical, simulating the weighing change of the intelligent catering weighing scale caused by humans during meal taking.

[0041] The controller 2 controls the circulation device to periodically simulate dish adding and meal taking, controls the external force simulation device 9 to introduce external force interference, simulates the weighing change affected by humans during meal taking, and operates automatically for a long time.

[0042] The working process of the present invention is as follows:

[0043] According to the volume and weight of the container 4 above the EUT weighing scale 3, determine the lower limit threshold and upper limit threshold of the dish weight of the operating parameters. Based on the big data of the self-service meal taking time, determine the meal taking duration T. Based on the big data of the service staff's dish serving time, determine the dish adding time T1. The host computer 1 sends the operating parameters to the controller 2.

[0044] The controller 2 collects the weight of the dishes above the EUT weigher 3 and controls the operation of the circulation device. If the weight of the dishes above the EUT weigher 3 is less than the lower threshold of the dish weight, the injection device 6 works, and the liquid in the storage device 7 is injected into the container 4 according to the dish-adding mode, simulating the impact on the EUT weigher 3 during dish-adding. After dish-adding, it is ensured that the weight of the dishes above the EUT weigher 3 is greater than or equal to the upper threshold of the dish weight. If the weight of the dishes above the EUT weigher 3 is greater than the lower threshold of the dish weight, the extraction device 5 works, simulating taking meals at a cycle of the meal-taking duration T. A certain flow rate Q of the liquid in the container 4 flows to the storage device 7 until it is less than the lower threshold of the dish weight, and Q = the weight of each meal-taking G / the meal-taking duration T.

[0045] The controller 2 outputs a PWM wave, controls the magnitude of the output current through the PWM current control module 10, and the controller controls the closing and opening of the multiplexer 11, thereby controlling the operation of one or more electromagnets in the electromagnet group 12 and the magnitude of the output magnetic force, so as to change the magnitude of the force on the container 4, simulating the interference of the weight above the EUT weigher 3 during manual meal-taking, and the duration is t, where t is less than the meal-taking duration T.

[0046] This device runs automatically for a long time. The controller 2 collects the weight change of the EUT weigher 3 at the millisecond level and uploads it to the upper computer 1, forming a change curve and database data log through software programming to statistically analyze the stability of the weigher under long-term operation of the EUT weigher 3.

[0047] The specific embodiments of the present invention disclosed above are only for illustration. However, the present invention is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A method for a device applicable to pressure testing of an intelligent catering weighing scale, comprising a host computer (1), a controller (2), a weighed EUT (3), a circulation device, and an external force simulation device (9). The host computer (1) communicates with the controller (2) by serial port. The controller (2) is electrically connected to the weighed EUT (3). The controller (2) is electrically connected to the circulation device. The controller (2) is electrically connected to the external force simulation device (9). The circulation device includes a container (4), a pumping device (5), an injection device (6), a storage device (7), and four sections of pipelines (8). The controller (2) is electrically connected to the pumping device (5), and the controller (2) is electrically connected to the injection device (6). The first section of the pipeline (8) connects the pumping device (5) and the container (4), the second section of the pipeline (8) connects the pumping device (5) and the storage device (7), the third section of the pipeline (8) connects the injection device (6) and the storage device (7), and the fourth section of the pipeline (8) connects the injection device (6) and the container (4). The weighed EUT (3) is fixedly connected to the container (4). The external force simulation device (9) includes a PWM current control module (10), a multiplexer (11), and an electromagnet group (12). The controller (2) is electrically connected to the PWM current control module (10), the controller (2) is electrically connected to the multiplexer (11), the electromagnet group (12) is electrically connected to the PWM current control module (10), and the electromagnet group (12) is electrically connected to the multiplexer (11). The electromagnet group (12) is composed of a plurality of electromagnets respectively fixedly connected to the four sides of the container (4); characterized in that Including the following steps: Step 1: Determine the lower threshold of the dish weight and the upper threshold of the dish weight of the operating parameters according to the volume and weight of the container (4) above the EUT weighing scale (3). Supported by the big data of the self-service meal-taking time, determine the meal-taking duration T. Supported by the big data of the serving time of the service staff, determine the dish-adding time T1. The host computer (1) sends the operating parameters to the controller (2). Step 2: The controller (2) collects the dish weight above the EUT weighing scale (3) and controls the operation of the circulation device. If the dish weight above the EUT weighing scale (3) is less than the lower threshold of the dish weight, the injection device (6) works, and the liquid in the storage device (7) is injected into the container (4) according to the dish-adding mode, simulating the impact on the EUT weighing scale (3) during dish adding. After dish adding, ensure that the dish weight above the EUT weighing scale (3) is greater than or equal to the upper threshold of the dish weight. If the dish weight above the EUT weighing scale (3) is greater than the lower threshold of the dish weight, the extraction device (5) works, simulating meal taking with a cycle of the meal-taking duration T, and extracting a certain flow rate Q of the liquid in the container (4) to flow to the storage device (7) until it is less than the lower threshold of the dish weight. Q = the weight of each meal taking G / the meal-taking duration T. Step 3: The controller (2) outputs a PWM wave, controls the output current magnitude through the PWM current control module (10), and the controller (2) controls the on-off of the multi-way switch (11), thereby controlling one or more electromagnets of the electromagnet group (12) to work and the output magnetic force magnitude, so as to change the magnitude of the force on the container (4), simulating the interference of the weight above the EUT weighing scale (3) during artificial meal taking, and the duration is t, where t is less than the meal-taking duration T. Step 4: The controller (2) collects the weight change of the EUT weighing scale (3) at the millisecond level and uploads it to the host computer (1), forming a change curve and a database data log through software programming to statistically analyze the stability of the weighing scale of the EUT weighing scale (3) during long-term operation.

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