A method and system for early warning of abnormal flow rates in trace amounts of oil-based release agents

Abstract

This invention relates to a method and system for early warning of abnormal flow rates in trace amounts of oil-based release agents. The method includes the following steps: acquiring downward and upward ultrasonic signals in a fluid channel and obtaining first and second time-simulated signals respectively; preprocessing the first and second time-simulated signals and determining the measured flow rate value; measuring the actual flow rate in the fluid channel and obtaining the actual flow rate value, and calculating the difference between the measured flow rate value and the actual flow rate value; constructing a flow rate segmentation early warning model, which includes a normal flow rate range, a prompt flow rate range, and a warning flow rate range; inputting the difference into the flow rate segmentation early warning model to determine whether the flow rate in the current fluid channel is abnormal. This invention can be used for early warning and buffering before abnormal flow rates of oil-based release agents occur, reducing the occurrence of abnormal flow rates, and can also provide timely alarm processing when abnormal flow rates occur, improving the yield rate of die-cast parts.

Description

Technical Field

[0001] This invention relates to the field of abnormal flow rate handling technology for oil-based release agents, and specifically to a method and system for early warning of abnormal flow rate of trace amounts of oil-based release agents. Background Technology

[0002] Large, one-piece die-cast parts are characterized by thin walls, large dimensions, numerous deep ribs, and difficulties in demolding during production. Particularly during the painting process, localized nozzle blockage or damage can lead to abnormal spray volume and uneven application of the oil-based release agent to the die-casting mold cavity surface, preventing complete coverage. Poor film formation or absence of an oil film on the mold cavity surface can result in localized scratches or poor molding, impacting the yield rate. Current technology often uses flow meters for flow measurement to assess whether the release agent application is abnormal. However, existing flow detection technologies have some drawbacks. For example, an existing method for measuring ultrasonic water flow includes: acquiring an upward ultrasonic signal and a downward ultrasonic signal in the pipe to be tested; acquiring a first maximum amplitude value of the upward ultrasonic signal based on the upward ultrasonic signal; acquiring a second maximum amplitude value of the downward ultrasonic signal based on the downward ultrasonic signal; matching the first maximum amplitude value and the second maximum amplitude value so that the deviation between the first maximum amplitude value and the second maximum amplitude value is less than a first preset threshold to obtain a matched upward ultrasonic signal and a matched downward ultrasonic signal; calculating the time-of-flight difference based on the matched upward ultrasonic signal and the matched downward ultrasonic signal; acquiring the water flow velocity based on the time-of-flight difference; acquiring the water temperature in the pipe to be tested; and calculating the water flow rate in the pipe to be tested based on the water flow velocity and the water temperature. However, while this method can be used for flow detection in pipelines, it cannot provide timely alerts or warnings for abnormal or abnormal flow rates during the application of oil-based release agents. This prevents operators from promptly adjusting abnormal flow rates, thus hindering the effective improvement of the yield rate of die-cast parts. Summary of the Invention

[0003] One objective of this invention is to provide a method for early warning of abnormal flow rate of trace oil-based release agents, so as to solve the problem in the prior art that it is impossible to provide timely prompts and warnings when the flow rate of oil-based release agents is about to become abnormal or has already become abnormal; another objective is to provide a system for early warning of abnormal flow rate of trace oil-based release agents.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A method for early warning of abnormal flow rate of trace oil-based release agents, characterized by comprising the following steps:

[0006] S1: Fluid is injected into the fluid channel. A downward ultrasonic signal sent from the first sidewall to the second sidewall in the fluid channel is acquired and a first time-simulated signal is obtained. An upward ultrasonic signal sent from the second sidewall to the first sidewall in the fluid channel is acquired and a second time-simulated signal is obtained.

[0007] S2: Preprocess the first time analog signal and the second time analog signal, and determine the measured flow rate of the fluid injection based on the preprocessed signal;

[0008] S3: Measure the actual flow rate of the fluid injected into the fluid channel and obtain the actual flow rate value, and calculate the difference between the measured flow rate value and the actual flow rate value;

[0009] S4: Construct a traffic segmentation early warning model, which includes normal traffic range, alert traffic range, and warning traffic range;

[0010] S5: Input the difference into the flow segmentation early warning model to determine whether the current fluid flow rate in the fluid channel is abnormal.

[0011] If the difference falls within the normal flow range, it indicates that the fluid flow in the current fluid channel is in a normal state.

[0012] If the difference falls within the indicated flow rate range, it indicates that the fluid flow rate in the current fluid channel is adjustable and an indication signal is issued.

[0013] If the difference falls within the warning flow range, it indicates that the fluid flow in the current fluid channel is abnormal and an alarm signal is issued.

[0014] Based on the aforementioned technical means, this method is used to detect and provide early warnings regarding abnormal fluid flow rates entering a fluid channel. Specifically, it acquires downward and upward ultrasonic signals from the fluid channel to determine the measured flow rate. Then, it measures the actual flow rate of the fluid injected into the channel and obtains the actual flow rate value. Subsequently, it calculates the difference between the measured and actual flow rates. Next, it constructs a flow segmentation early warning model and inputs the difference into this model. By analyzing the corresponding flow range of the difference within the flow segmentation early warning model, it can determine whether the current fluid flow rate in the fluid channel is abnormal. The flow segmentation early warning model includes a normal flow range, a warning flow range, and... The warning flow range has several interpretations. If the difference falls within the normal flow range, it indicates that the fluid flow rate in the current fluid channel is normal, and the fluid will continue to be injected into the channel at its current rate. If the difference falls within the warning flow range, it indicates that the fluid flow rate in the current fluid channel may be approaching an abnormality, but is still within an adjustable range. In this case, a corresponding warning signal will be issued to prompt the spraying equipment used to spray the fluid to be adjusted as soon as possible, allowing for buffering before an abnormal situation occurs and reducing its occurrence. If the difference falls within the warning flow range, it indicates that the fluid flow rate in the current fluid channel is already in an abnormal state, and an alarm signal will be issued to warn the user.

[0015] Further, step S1 specifically includes: the fluid channel is a pipe, a first ultrasonic transceiver module is installed on the first side of the pipe, and a second ultrasonic transceiver module is installed on the second side of the pipe, the first side and the second side being opposite sides; the first ultrasonic transceiver module emits the downlink ultrasonic signal and is received by the second ultrasonic transceiver module to obtain a first time analog signal, and the second ultrasonic transceiver module emits the uplink ultrasonic signal and is received by the first ultrasonic transceiver module to obtain a second time analog signal.

[0016] Based on the above technical means, the piping arrangement facilitates the installation of the first and second ultrasonic transceiver modules, and also facilitates the acquisition of piping data information required in subsequent steps.

[0017] Further, step S2 specifically includes: converting and amplifying the first time analog signal and the second time analog signal, then obtaining the first time digital signal and the second time digital signal respectively, and then performing time-difference ultrasonic flow calculation on the first time digital signal and the second time digital signal to obtain the measured flow value.

[0018] Based on the above technical means, the acquired downlink and uplink ultrasonic signals can be converted into the data information required for subsequent fluid flow calculation.

[0019] Furthermore, the formula for calculating the time-difference ultrasonic flow rate is as follows:

[0020]

[0021]

[0022]

[0023] In the formula, Q 测 The measured flow rate is represented by , D represents the diameter of the fluid channel, c represents the speed of sound, θ represents the angle between the ultrasonic trajectory and the axis of the fluid channel when the fluid is stationary, and t1 and t2 represent the first and second time digital signals, respectively.

[0024] Based on the above technical means, the measured flow rate can be calculated using the time-difference ultrasonic flow rate calculation formula.

[0025] Furthermore, in step S3, the method for measuring the actual flow rate is as follows: by collecting the total amount of fluid flowing through the fluid channel, then using a measuring instrument to measure the total amount of fluid and obtaining the actual flow rate value, which is recorded as Q. 实 The difference is denoted as Q. 差 And Q 差 =Q 测 -Q 实 , where Q 测 This represents the measured flow rate value in step S2.

[0026] Based on the above technical means, the actual flow rate can be obtained by measuring the total amount of fluid flowing through the fluid channel using measuring instruments.

[0027] Further, in step S4, the normal flow range is denoted as Q1, and satisfies 0 ≤ Q1 < 0.4 mL; the warning flow range is denoted as Q2, and satisfies 0.4 mL ≤ Q2 < 0.5 mL; the alert flow range includes a first alert flow range and is denoted as Q3, and satisfies Q3 ≥ 0.5 mL; in step S5, the warning signal includes flashing lights on an audible and visual alarm pillar light and a voice prompt indicating that there may be an impending abnormal flow; the alarm signal includes flashing lights on an audible and visual alarm pillar light and an alarm siren.

[0028] Based on the aforementioned technical means, when the difference falls within the warning flow range of 0.4mL ≤ Q2 < 0.5mL, it indicates that the fluid flow rate in the current fluid channel may be approaching an abnormality. The spraying equipment used to eject the fluid needs to be adjusted as soon as possible to bring the fluid flow rate in the fluid channel closer to normal. Therefore, the flashing lights and voice prompts of the audible and visual alarm pillar lights can be used to buffer the occurrence of abnormal situations and reduce their occurrence. When the difference falls within the first warning flow range of Q3 ≥ 0.5mL, it indicates that the fluid flow rate in the current fluid channel is already in an abnormal state. At this time, the flashing lights and siren of the audible and visual alarm pillar lights provide further warning.

[0029] Further, in step S4, the normal flow range is denoted as Q1, and satisfies 0 ≤ Q1 < 0.4 mL; the warning flow range is denoted as Q2, and satisfies 0.4 mL ≤ Q2 < 0.5 mL; the warning flow range includes a first warning flow range and a second warning flow range, denoted as Q3 and Q4 respectively, and satisfies 0.5 ≤ Q3 ≤ 0.6 mL, Q4 > 0.6 mL; in step S5, the warning signal includes flashing lights and a voice prompt indicating that there may be an abnormal flow rate; the alarm signal includes a first alarm signal corresponding to the first warning flow range and a second alarm signal corresponding to the second warning flow range; wherein, the first alarm signal includes flashing lights and an alarm siren; the second alarm signal includes flashing lights and an alarm siren, and also includes sending a stop operation command to the spraying equipment used to spray fluid from the fluid channel.

[0030] According to the above technical means, when the difference is within the first warning flow range of 0.5≤Q3≤0.6mL, an alarm is triggered by flashing lights and sounding an alarm horn. When the difference is within the second warning flow range of Q4>0.6mL, in addition to flashing lights and sounding an alarm horn, a stop operation command is sent to the spraying equipment that is spraying the fluid to prevent other unnecessary emergencies from occurring in the fluid channel. The fluid is then sprayed into the fluid channel again after the abnormality is handled.

[0031] A system for early warning of abnormal flow of trace oil-based release agent includes piping, fasteners, a first ultrasonic transceiver module, a second ultrasonic transceiver module, a processing and analysis module, and an early warning module. The first ultrasonic transceiver module is installed on a first side of the piping via fasteners, and the second ultrasonic transceiver module is installed on a second side of the piping via fasteners. The first and second sides are opposite to each other, and the first ultrasonic transceiver module is located upstream of the second ultrasonic transceiver module. The first, second, and early warning modules are all communicatively connected to the processing and analysis module, which is also used to communicate with a spraying device.

[0032] According to the above technical means, the first ultrasonic transceiver module and the second ultrasonic transceiver module can be installed on the first and second sides of the piping respectively by fasteners. The fasteners can improve the installation convenience of the first and second ultrasonic transceiver modules on the piping. The processing and analysis module can be used to process and analyze the signals emitted by the first and second ultrasonic transceiver modules. The processing and analysis module can also control whether the early warning module needs to issue an early warning and whether the spraying equipment should continue spraying based on the results of its processing and analysis.

[0033] Furthermore, the processing and analysis module includes a controller and a relay amplifier that is communicatively connected to the controller. The first ultrasonic transceiver module and the second ultrasonic transceiver module are both communicatively connected to the relay amplifier. The early warning module is communicatively connected to the controller, and the controller is used to communicate with the spraying equipment.

[0034] Based on the above technical means, the relay amplifier can be used to process the signals acquired by the first ultrasonic transceiver module and the second ultrasonic transceiver module, so that the processed signal form can meet the signal form required by the controller during processing and analysis.

[0035] Furthermore, the piping is metal piping, the fastener is a clamp retaining ring, the first ultrasonic transceiver module and the second ultrasonic transceiver module are respectively a first ultrasonic transceiver and a second ultrasonic transceiver; the first ultrasonic transceiver is connected to the first outer diameter of the metal piping through the clamp retaining ring, and the second ultrasonic transceiver is connected to the second outer diameter of the metal piping through the clamp retaining ring; the warning module includes an audible and visual alarm pillar light.

[0036] According to the above-mentioned technical means, the first ultrasonic transceiver and the second ultrasonic transceiver can be fixedly installed on the first and second sides of the outer diameter of the metal pipe by clamping and fixing rings, respectively, thereby improving the installation convenience of the first ultrasonic transceiver and the second ultrasonic transceiver on the metal pipe; the audible and visual alarm post light can be used to realize audible and visual alarm.

[0037] The beneficial effects of this invention are:

[0038] (1) This invention constructs a flow segment early warning model and, based on the warning flow range set in the flow segment early warning model, enables a buffering process before an abnormal situation occurs when judging whether the flow rate in the fluid channel is abnormal, thereby reducing the occurrence of abnormal situations in the fluid channel; and if the flow rate in the fluid channel is already in an abnormal state, there is also a corresponding alarm warning.

[0039] (2) The first ultrasonic transceiver module and the second ultrasonic transceiver module of the present invention can be installed on the first side and the second side of the piping respectively by fasteners, which can improve the installation convenience of the first ultrasonic transceiver module and the second ultrasonic transceiver module on the piping; the early warning module can be used to issue early warning prompts or alarms.

[0040] (3) This invention can be applied to the early warning of abnormal flow rate of oil-based release agent when spraying it onto the surface of die casting mold cavity, and can timely avoid uneven spraying of oil-based release agent, thereby improving the yield of die castings. Attached Figure Description

[0041] Figure 1 This is a flowchart of the method in this invention;

[0042] Figure 2 This is a detailed breakdown of the flowchart of the method in this invention;

[0043] Figure 3 This is a bar chart illustrating the measured flow rate values ​​and actual flow rate values ​​under multiple measurements in this invention.

[0044] Figure 4 This is a connection diagram of the system in this invention, where the left arrow represents the direction of fluid flow, and the opposing arrows in the middle represent the transmission and reception relationship of ultrasonic signals.

[0045] Among them, 1-piping; 2-fasteners; 3-first ultrasonic transceiver module; 4-second ultrasonic transceiver module; 5-relay amplifier; 6-controller; 7-spraying equipment; 8-early warning module. Detailed Implementation

[0046] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0047] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0048] This embodiment proposes a method for early warning of abnormal flow rates in trace amounts of oil-based release agents, such as... Figure 1 As shown, it includes the following steps:

[0049] S1: Fluid is injected into the fluid channel. A downward ultrasonic signal sent from the first sidewall to the second sidewall in the fluid channel is obtained and a first time-simulated signal is obtained. An upward ultrasonic signal sent from the second sidewall to the first sidewall in the fluid channel is obtained and a second time-simulated signal is obtained.

[0050] S2: Preprocess the first time analog signal and the second time analog signal, and determine the measured flow rate of the fluid injection based on the preprocessed signal;

[0051] S3: Measure the actual flow rate of the fluid injected into the fluid channel and obtain the actual flow rate value, and calculate the difference between the measured flow rate value and the actual flow rate value;

[0052] S4: Construct a traffic segmentation early warning model, which includes normal traffic range, alert traffic range, and warning traffic range;

[0053] S5: Input the difference into the flow segmentation early warning model to determine whether the fluid flow rate in the current fluid channel is abnormal.

[0054] If the difference falls within the normal flow range, it indicates that the fluid flow in the current fluid channel is normal.

[0055] If the difference falls within the indicated flow rate range, it means that the fluid flow rate in the current fluid channel is adjustable and an indication signal will be issued.

[0056] If the difference falls within the warning flow range, it indicates that the fluid flow in the current fluid channel is abnormal and an alarm signal is issued.

[0057] In this embodiment, the present invention can be applied to provide early warning of abnormal flow rates of oil-based release agents when spraying them onto the surface of die-casting mold cavities. For example... Figure 2 As shown, step S1 specifically includes: the fluid channel is pipe 1, and the spraying device 7 is used to spray oil-based release agent into pipe 1. After flowing through pipe 1, the oil-based release agent will be sprayed onto the surface of the die-casting mold cavity; fasteners 2 are used to install the first ultrasonic transceiver module 3 at the first side of pipe 1 and the second ultrasonic transceiver module 4 at the second side of pipe 1, with the first side and the second side being opposite sides; the first ultrasonic transceiver module 3 emits a downlink ultrasonic signal, which passes through the first side wall of pipe 1, the oil-based release agent, and the second side wall of pipe 1 in sequence, and is received by the second ultrasonic transceiver module 4 to obtain a first time analog signal; the second ultrasonic transceiver module 4 emits an uplink ultrasonic signal, which passes through the second side wall of pipe 1, the oil-based release agent, and the first side wall of pipe 1 in sequence, and is received by the first ultrasonic transceiver module 3 to obtain a second time analog signal. It should be noted that the fluid detection accuracy can reach 0.05 mL using ultrasonic detection, enabling the detection of trace flow rates.

[0058] In this embodiment, as Figure 2 As shown, step S2 specifically includes: both the first ultrasonic transceiver module 3 and the second ultrasonic transceiver module 4 are communicatively connected to a processing and analysis module, which includes a relay amplifier 5 and a controller 6; the first time analog signal and the second time analog signal are transmitted to the relay amplifier 5 for analog-to-digital conversion and amplification, and then the first time digital signal t1 and the second time digital signal t2 are obtained respectively; then, the first time digital signal t1 and the second time digital signal t2 are transmitted to the controller 6 for time-difference ultrasonic flow calculation to obtain the measured flow value, which is recorded as Q. 测 .

[0059] In this embodiment, the formula for calculating the time-difference ultrasonic flow rate is:

[0060]

[0061]

[0062]

[0063] In the formula, Q 测 The measured flow rate is represented by , D represents the diameter of pipe 1, c represents the velocity of sound, θ represents the angle between the ultrasonic trajectory and the axis of the fluid channel when the fluid is stationary, and t1 and t2 represent the first and second time-based digital signals, respectively. Pipe 1 can use standard components to obtain a more accurate diameter value.

[0064] In this embodiment, as Figure 2 As shown, step S3 specifically includes: collecting the total amount of oil-based release agent flowing through pipe 1, then measuring the total amount of oil-based release agent using a measuring instrument to obtain the actual flow rate value and recording it as Q. 实 The difference between the measured flow rate and the actual flow rate is denoted as Q. 差 And Q 差 =Q 测 -Q 实 It should be noted that the measuring instruments used when measuring actual flow rates are existing instruments.

[0065] In this embodiment, as Figure 2 As shown, in step S4, the normal flow range is denoted as Q1, and satisfies 0≤Q1<0.4mL; the warning flow range is denoted as Q2, and satisfies 0.4mL≤Q2<0.5mL; the alert flow range can include the first alert flow range and is denoted as Q3, and satisfies Q3≥0.5mL. Under the aforementioned warning flow range division, in step S5, if the difference falls within the normal flow range, it indicates that the current flow rate of the oil-based release agent in pipe 1 is normal, and the spraying equipment 7 will continue to spray the oil-based release agent. If the difference falls within the warning flow range, it indicates that the current flow rate of the oil-based release agent in pipe 1 is approaching an abnormality. At this time, it is in an adjustable state and a warning signal is issued. The warning signal includes flashing lights through the audible and visual alarm pillar lights and a voice prompt indicating that there may be an impending flow abnormality. After receiving the voice prompt, the operator can quickly adjust or repair the spraying equipment 7 before an abnormality occurs, which can reduce the occurrence of abnormalities. If the difference falls within the warning flow range, it indicates that the current flow rate of the oil-based release agent in pipe 1 has become abnormal, and an alarm signal will be issued. The alarm signal includes flashing lights through the audible and visual alarm pillar lights and an alarm siren.

[0066] In this embodiment, the warning flow range can also include a first warning flow range and a second warning flow range, denoted as Q3 and Q4 respectively, and satisfying 0.5≤Q3≤0.6mL, Q4>0.6mL. Under the above warning flow range division, in step S5, if the difference belongs to the first warning flow range, the alarm signal issued at this time is the first alarm signal, which includes flashing lights and whistling alarm lights through the audible and visual alarm pillar lights. If the difference belongs to the second warning flow range, the alarm signal issued at this time is the second alarm signal, which includes flashing lights and whistling alarm lights through the audible and visual alarm pillar lights, and also includes sending a stop operation instruction to the spraying equipment 7 used for spraying the ejected fluid. The oil-based release agent will be sprayed after the abnormality is handled, which can timely avoid the situation of uneven spraying of oil-based release agent and improve the yield of die castings.

[0067] like Figure 3 The diagram shows a comparison between 10 measured flow rates taken at different times and the actual flow rates. In each group of columns, columns 1-10 on the left represent the numerical values ​​of the 10 measured flow rates, while the columns on the right represent the actual flow rates obtained from the 10 actual measurements. Thus, the Q value for these 10 groups can be obtained. 差 The concentrations were 0.28ml, 0.29ml, 0.24ml, 0.33ml, 0.31ml, 0.21ml, 0.3ml, 0.26ml, 0.19ml, and 0.14ml, respectively. Since all the above data satisfy 0≤Q1<0.4mL, it can be concluded that the current oil-based release agent is within the normal flow range.

[0068] In this embodiment, a system for an abnormal flow warning method of trace oil-based release agents is also proposed, such as... Figure 4 As shown, the system includes a piping 1, fasteners 2, a first ultrasonic transceiver module 3, a second ultrasonic transceiver module 4, a processing and analysis module, and an early warning module 8. The first ultrasonic transceiver module 3 is installed on the first side of the piping 1 via fasteners 2, and the second ultrasonic transceiver module 4 is installed on the second side of the piping 1 via fasteners 2. The first and second sides are opposite to each other, and the first ultrasonic transceiver module 3 is located upstream of the second ultrasonic transceiver module 4. The first ultrasonic transceiver module 3, the second ultrasonic transceiver module 4, and the early warning module 8 are all communicatively connected to the processing and analysis module, which is also communicatively connected to the spraying equipment 7.

[0069] In this embodiment, the processing and analysis module includes a controller 6 and a relay amplifier 5 communicatively connected to the controller 6. The first ultrasonic transceiver module 3 and the second ultrasonic transceiver module 4 are both communicatively connected to the relay amplifier 5. The early warning module 8 is communicatively connected to the controller 6, and the controller 6 is communicatively connected to the spraying equipment 7. The controller 6 can control the start and stop of the spraying equipment 7 based on the processing and analysis results.

[0070] In this embodiment, pipe 1 is a metal pipe, and fastener 2 is a clamp retaining ring. The clamp retaining ring includes a first fixing half-ring and a second fixing half-ring, which are locked together by a locking clamp. The first ultrasonic transceiver module 3 and the second ultrasonic transceiver module 4 are respectively a first ultrasonic transceiver and a second ultrasonic transceiver. The first ultrasonic transceiver is connected to the first outer diameter of the metal pipe via the clamp retaining ring, and the second ultrasonic transceiver is connected to the second outer diameter of the metal pipe via the clamp retaining ring. The clamp retaining ring improves the ease of installation of the first and second ultrasonic transceivers on pipe 1. In this embodiment, the warning module 8 includes an audible and visual alarm pillar light. It should be noted that the warning module 8 may also include a voice announcer, a buzzer, and other devices.

[0071] The above embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention.

Claims

1. A method for early warning of abnormal flow rate of trace oil-based release agents, characterized in that: Includes the following steps: S1: Fluid is injected into the fluid channel. A downward ultrasonic signal sent from the first sidewall to the second sidewall in the fluid channel is acquired and a first time-simulated signal is obtained. An upward ultrasonic signal sent from the second sidewall to the first sidewall in the fluid channel is acquired and a second time-simulated signal is obtained. S2: Preprocess the first time analog signal and the second time analog signal, and determine the measured flow rate of the fluid injection based on the preprocessed signal; S3: Measure the actual flow rate of the fluid injected into the fluid channel and obtain the actual flow rate value, and calculate the difference between the measured flow rate value and the actual flow rate value; S4: Construct a traffic segmentation early warning model, which includes normal traffic range, alert traffic range, and warning traffic range; S5: Input the difference into the flow segmentation early warning model to determine whether the current fluid flow rate in the fluid channel is abnormal. If the difference falls within the normal flow range, it indicates that the fluid flow in the current fluid channel is in a normal state. If the difference falls within the indicated flow rate range, it indicates that the fluid flow rate in the current fluid channel is adjustable and an indication signal is issued. If the difference falls within the warning flow range, it indicates that the fluid flow in the current fluid channel is abnormal and an alarm signal is issued.

2. The method for early warning of abnormal flow rate of trace oil-based release agent according to claim 1, characterized in that: Step S1 specifically includes: the fluid channel is a pipe (1), a first ultrasonic transceiver module (3) is installed on the first side of the pipe (1), and a second ultrasonic transceiver module (4) is installed on the second side of the pipe (1), the first side and the second side are opposite sides; the first ultrasonic transceiver module (3) emits the downlink ultrasonic signal and is received by the second ultrasonic transceiver module (4) to obtain a first time analog signal, and the second ultrasonic transceiver module (4) emits the uplink ultrasonic signal and is received by the first ultrasonic transceiver module (3) to obtain a second time analog signal.

3. The method for early warning of abnormal flow rate of trace oil-based release agent according to claim 1, characterized in that: Step S2 specifically includes: converting and amplifying the first time analog signal and the second time analog signal to obtain the first time digital signal and the second time digital signal respectively; then performing time-difference ultrasonic flow calculation on the first time digital signal and the second time digital signal to obtain the measured flow value.

4. The method for early warning of abnormal flow rate of trace oil-based release agent according to claim 3, characterized in that: The formula for calculating the time-difference ultrasonic flow rate is as follows: In the formula, Indicates the measured flow rate value. Indicates the diameter of the fluid channel. Indicates the speed of sound. This represents the angle between the ultrasonic trajectory and the axis of the fluid channel when the fluid is stationary. , These represent the first-time digital signal and the second-time digital signal, respectively.

5. The method for early warning of abnormal flow rate of trace oil-based release agent according to claim 1, characterized in that: In step S3, the method for measuring the actual flow rate is as follows: by collecting the total amount of fluid flowing through the fluid channel, then using a measuring instrument to measure the total amount of fluid and obtain the actual flow rate value, which is recorded as follows. The difference is denoted as ,and ,in, This represents the measured flow rate value in step S2.

6. The method for early warning of abnormal flow rate of trace oil-based release agent according to any one of claims 1 to 5, characterized in that: In step S4, the normal flow range is denoted as And satisfying 0≤ <0.4mL; the indicated flow rate range is denoted as And satisfy 0.4 mL ≤ <0.5 mL; the warning flow range includes the first warning flow range and is denoted as And satisfy ≥0.5mL; In step S5, the prompt signal includes flashing lights on the audible and visual alarm pillar lights and a voice prompt indicating that there may be an impending traffic anomaly; the alarm signal includes flashing lights on the audible and visual alarm pillar lights and an alarm siren.

7. The method for early warning of abnormal flow rate of trace oil-based release agent according to any one of claims 1 to 5, characterized in that: In step S4, the normal flow range is denoted as And satisfying 0≤ <0.4mL; the indicated flow rate range is denoted as And satisfy 0.4 mL ≤ <0.5 mL; the warning flow range includes a first warning flow range and a second warning flow range, which are respectively denoted as... and And satisfy 0.5≤ ≤0.6mL, >0.6mL; In step S5, the prompt signal includes flashing lights and a voice prompt indicating that there may be an abnormal flow rate. The alarm signal includes a first alarm signal corresponding to the first warning flow rate range and a second alarm signal corresponding to the second warning flow rate range. The first alarm signal includes flashing lights and an alarm siren. The second alarm signal includes flashing lights and an alarm siren, and also includes sending a stop operation command to the spraying equipment (7) used to spray fluid from the fluid channel.

8. The method for early warning of abnormal flow rate of trace oil-based release agent according to any one of claims 1 to 5, characterized in that: It also includes a system for an abnormal flow warning method for trace oil-based release agents, the system including a pipe (1), fasteners (2), a first ultrasonic transceiver module (3), a second ultrasonic transceiver module (4), a processing and analysis module, and an early warning module (8); the first ultrasonic transceiver module (3) is installed on the first side of the pipe (1) by fasteners (2), the second ultrasonic transceiver module (4) is installed on the second side of the pipe (1) by fasteners (2), the first side and the second side are opposite sides, and the first ultrasonic transceiver module (3) is located upstream of the second ultrasonic transceiver module (4); the first ultrasonic transceiver module (3), the second ultrasonic transceiver module (4), and the early warning module (8) are all communicatively connected to the processing and analysis module, and the processing and analysis module is also used to communicate with the spraying equipment (7).

9. The method for early warning of abnormal flow rate of trace oil-based release agent according to claim 8, characterized in that: The processing and analysis module includes a controller (6) and a relay amplifier (5) that is communicatively connected to the controller (6). The first ultrasonic transceiver module (3) and the second ultrasonic transceiver module (4) are both communicatively connected to the relay amplifier (5). The early warning module (8) is communicatively connected to the controller (6). The controller (6) is used to communicate with the spraying equipment (7).

10. The method for early warning of abnormal flow rate of trace oil-based release agent according to claim 8, characterized in that: The piping (1) is a metal piping, the fastener (2) is a clamping ring, the first ultrasonic transceiver module (3) and the second ultrasonic transceiver module (4) are respectively the first ultrasonic transceiver and the second ultrasonic transceiver; the first ultrasonic transceiver is connected to the first outer diameter of the metal piping through the clamping ring, and the second ultrasonic transceiver is connected to the second outer diameter of the metal piping through the clamping ring; the warning module (8) includes an audible and visual alarm pillar light.

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