Calibration methods and related devices for safety isolation products

Abstract

This application proposes a calibration method and related apparatus for a safety isolation product, relating to the field of automation control technology. The method may include: inputting a control standard signal into the safety isolation product; acquiring the actual output value of the safety isolation product; determining a first deviation of the safety isolation product based on the actual output value and a target output value; and, based on the first deviation, controlling a calibration device to adjust the resistance value of a target resistor in a fine-tuning circuit. The technical solution provided by this application can solve the problem of poor calibration effect in existing manual calibration methods for safety isolation products.

Description

Technical Field

[0001] This application relates to the field of automation control technology, and more specifically, to a calibration method and related apparatus for a safety isolation product. Background Technology

[0002] In the manufacturing process of security isolation products, a core aspect is ensuring that the output accuracy of the signal conditioning circuitry is within the allowable tolerance range. This requirement necessitates calibration, primarily achieved by fine-tuning the resistance values ​​of key resistors in the circuitry. Currently, the most common resistance adjustment method is manual adjustment, where operators manually rotate potentiometer knobs on the circuit board to change the resistance value and correct for accuracy deviations caused by component parameter variations, assembly errors, etc.

[0003] However, manual calibration relies entirely on repetitive manual labor of "visual inspection and adjustment," making it time-consuming and inefficient. Furthermore, inconsistent calibration results among operators due to varying experience levels can lead to higher product return rates. Additionally, prolonged potentiometer adjustments can cause operator fatigue, resulting in misjudgments or over-adjustments, increasing the risk of products failing to meet specifications. Summary of the Invention

[0004] Based on the defects and shortcomings of the prior art, this application proposes a calibration method and related apparatus for security isolation products, which can solve the problem of poor calibration effect in the existing manual calibration method for security isolation products.

[0005] According to a first aspect of this application, a calibration method for a safety isolation product is provided, the method comprising: The control standard signal is input to the security isolation product, and the actual output value of the security isolation product is collected; Based on the actual output value and the target output value, determine the first deviation of the security isolation product; Based on the first deviation, the control calibration device adjusts the resistance value of the target resistor in the fine-tuning circuit.

[0006] According to a second aspect of this application, a calibration apparatus for a safety isolation product is provided, the apparatus comprising: The signal acquisition module is used to control the input of standard signals to the security isolation product and to acquire the actual output value of the security isolation product. The deviation determination module is used to determine the first deviation of the safety isolation product based on the actual output value and the target output value. The calibration module is used to control the calibration device to adjust the resistance value of the target resistor in the fine-tuning circuit based on the first deviation.

[0007] According to a third aspect of this application, a calibration system for a safety isolation product is provided, comprising: a controller, a signal input device, a signal acquisition device, a safety isolation product, and a calibration device, wherein the controller and the safety isolation product are respectively connected to the signal input device, the signal acquisition device, and the calibration device; The controller is used to control the signal input device to input standard signals into the security isolation product connected to it; The signal acquisition device is used to acquire the actual output value of the security isolation product connected to it, and send the actual output value to the controller; The controller is also used to determine a first deviation of the safety isolation product based on the actual output value and the target output value, and based on the first deviation, control the calibration device to adjust the resistance value of the target resistor in the fine-tuning circuit.

[0008] According to a fourth aspect of this application, an electronic device is provided, comprising: a memory and a processor; The memory is connected to the processor and is used to store programs; The processor is used to implement the calibration method for the security isolation product as described in the first aspect by running a program in the memory.

[0009] According to a fifth aspect of this application, a storage medium is provided that stores a computer program, which, when executed by a processor, implements the calibration method for the security isolation product as described in the first aspect.

[0010] According to a sixth aspect of this application, a computer program product or computer program is provided, the computer program product including the computer program, wherein a processor executing the computer program implements the steps in the calibration method for a security isolation product as described in the first aspect. Optionally, the computer program may be stored on a readable storage medium of a computer device or in the cloud; the processor of the computer device reads the computer program from the readable storage medium or the cloud.

[0011] In the technical solution provided in this application, the controller can control the signal input device to input a standard signal to the safety isolation product connected to it, and control the signal acquisition device to acquire the actual output value of the safety isolation product. Based on the deviation between the actual output value and the target output value, the controller controls the calibration device to adjust the resistance value of the target resistor in the fine-tuning circuit, thereby achieving automatic calibration of the accuracy of the safety isolation product. The technical solution provided in this application, due to its automated calibration, reduces manual intervention and thus improves calibration efficiency. Furthermore, the calibration method is uniformly decided by the controller, eliminating uncertainties introduced by factors such as operator skill, fatigue, and errors, improving the consistency of performance parameters of products in the same batch or even different batches, and reducing product rework rates and the risk of products not meeting specifications. Attached Figure Description

[0012] Figure 1 This is one of the schematic diagrams of a calibration system provided in an embodiment of this application.

[0013] Figure 2 This is a second schematic diagram of a calibration system provided in an embodiment of this application.

[0014] Figure 3 This is a third schematic diagram of a calibration system provided in an embodiment of this application.

[0015] Figure 4 This is the fourth schematic diagram of a calibration system provided in the embodiments of this application.

[0016] Figure 5 This is a schematic flowchart illustrating a calibration method for a security isolation product provided in an embodiment of this application.

[0017] Figure 6 This is a block diagram of a calibration device for a safety isolation product provided in an embodiment of this application.

[0018] Figure 7 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] Exemplary System This application provides a calibration system for a safety isolation product. The system will be described in detail below through several embodiments. These embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0021] like Figure 1 As shown, the calibration system may include: a controller, a signal input device, a signal acquisition device, a safety isolation product, and a calibration device.

[0022] The controller and safety isolation products are connected to the signal input device, signal acquisition device, and calibration device, respectively.

[0023] The controller can send signal output commands to the signal input device to control the signal input device to output a standard signal to the safety isolation product connected to it. This standard signal can also be called a calibration signal, specifically a current signal used for calibration.

[0024] The controller can also send current detection commands to the signal output device to control the signal output device to collect the actual output value of the safety isolation product and send the collected actual output value to the controller.

[0025] The controller can also determine the first deviation of the safety isolation product based on the actual output value and the preset target output value, and based on this first deviation, determine the operating parameters of the calibration device, and control the calibration device to adjust the resistance value of the target resistor in the fine-tuning circuit according to the operating parameters. A pre-established correspondence is established between the operating parameters and the deviation, and the controller can determine the operating parameters corresponding to the first deviation based on this correspondence.

[0026] The controller described here can be a computer terminal device, such as a laptop, desktop computer, or professional computer, or it can be a server device. As the core processor, this controller can send instructions to signal input devices and acquire data via the data bus, and can also directly control the actions of the calibration device.

[0027] The signal input device described herein can be a high-precision, programmable standard signal source that can output multiple sets of different current parameters as required, such as standard currents of 0mA, 4mA, 8mA, 12mA, 16mA, and 20mA, which can be set according to actual needs. The control input terminal of this signal input device can be connected to the control signal output terminal of the controller via a data bus, and its signal output terminal can be connected to the input terminal of the safety isolation product being calibrated via a test cable.

[0028] The signal acquisition device described herein can be a high-precision, multi-channel digital multimeter or a data acquisition card. The signal acquisition end of this device is connected to the output end of the safety isolation product being calibrated via a test cable, and its data output end is connected to the data acquisition port of the controller via a data bus.

[0029] The safety isolation products mentioned here refer to a general term for signal conditioning equipment that integrates electrical isolation and safety technologies in industrial automation and control systems. These products establish electrical barriers between inputs, outputs, and power supplies to achieve precise signal transmission and interference suppression. They can even limit the entry of hazardous energy into the field, ensuring no ignition source is generated in flammable and explosive environments. These safety isolation products can be ordinary signal isolators or safety barriers; safety barriers can be considered a specially designed signal isolator with explosion-proof certification.

[0030] The fine-tuning circuit described here is a circuit structure in a safety isolation product. By adjusting the resistance value of the key resistor (i.e., the target resistor) in this fine-tuning circuit, the accuracy calibration of the safety isolation product can be achieved.

[0031] The calibration device described herein can automatically adjust the resistance value of the target resistor under the control of the controller.

[0032] The target output value mentioned here is the ideal current output value after the safety isolation product processes the input current.

[0033] In this embodiment, the controller can control the signal input device to input a standard signal to the connected safety isolation product, and control the signal acquisition device to acquire the actual output value of the safety isolation product. Based on the deviation between the actual output value and the target output value, the controller controls the calibration device to adjust the resistance value of the target resistor in the fine-tuning circuit, thereby achieving automatic calibration of the safety isolation product's accuracy. The calibration system provided in this embodiment, being automated, reduces manual intervention and thus improves calibration efficiency. Furthermore, the system's unified decision-making by the controller eliminates the dispersion introduced by factors such as operator skill, fatigue, and errors, improving the consistency of performance parameters across all products in the same batch or even different batches, and reducing product rework rates and the risk of products not meeting specifications.

[0034] In some alternative embodiments, such as Figure 2 As shown, the controller may include: a logic control unit, a data processing unit, an intelligent decision-making algorithm unit, a calibration equipment drive unit, and a human-machine interaction unit.

[0035] The logic control unit is used to coordinate the timing of actions of all devices within the calibration system.

[0036] The data processing unit is used to receive and process measurement data from the signal acquisition device, which is the actual output value of the security isolation product.

[0037] The intelligent decision-making algorithm unit contains an advanced control algorithm that is used to determine and output accurate operating parameters of the calibration equipment based on the deviation between the measured data and the target output value.

[0038] The calibration equipment drive unit is used to drive the calibration equipment to work based on the working parameters determined by the intelligent decision-making algorithm unit.

[0039] The human-computer interaction unit is used to set the specifications of the safety isolation product, start / stop the calibration system, and display real-time status and data.

[0040] The various units within the controller coordinate with each other to complete the calibration of the safety isolation product. Operators can import the product's specifications and parameters through the controller's human-machine interface and initiate the calibration system. All subsequent complex processes are automatically completed by the calibration system, making operation simple and convenient. This simplifies operation and control, reducing the skill requirements for operators. Furthermore, the embedded intelligent decision-making algorithm autonomously calculates the resistance adjustment, replacing reliance on operator experience and avoiding human error and over-adjustment, thus standardizing and digitizing the production process.

[0041] In some alternative embodiments, such as Figure 3 As shown, the calibration system may also include integrated test fixtures and automated equipment.

[0042] This integrated test fixture is used to place and fix safety isolation products. It can be connected to a controller and, under the controller's command, can perform operations such as fixing or releasing the safety isolation products.

[0043] This integrated test fixture can also be electrically connected to safety isolation products, signal input devices, and signal acquisition devices. The signal input device can send a standard signal to the safety isolation product through the integrated test fixture; that is, the signal input device sends a standard signal to the integrated test fixture, and then the integrated test fixture sends the standard signal to the safety isolation product. The signal acquisition device can acquire the actual output value of the safety isolation product through the integrated test fixture; that is, the safety isolation product sends the actual output value to the integrated test fixture, and then the integrated test fixture sends the actual output value to the signal acquisition device. The electrical connection method can be set according to actual needs, and this embodiment does not specifically limit it.

[0044] The automated equipment can be an automated production line that can be connected to a controller. Under the control of the controller, it is used to place the safety isolation products to be calibrated on the integrated test fixture and to transfer the calibrated safety isolation products to the next process in the production line.

[0045] Correspondingly, such as Figure 4 As shown, the controller may also include an automation control unit. When the logic control unit determines that the accuracy of the safety isolation product meets the requirements, it can send control commands to the automation control unit so that the automation control unit controls the automation equipment to remove the calibrated safety isolation product from the integration test fixture and place the next safety isolation product to be calibrated on the integration test fixture.

[0046] In this embodiment, the centralized control of the controller and the automatic switching of integrated testing fixtures and automated equipment for safety isolation products eliminate manual intervention and waiting time, realizing seamless connection and automated operation of the entire process from product tooling, testing, decision-making and resistance adjustment. The calibration time of a single product is significantly shortened, improving the calibration efficiency of safety isolation products.

[0047] In some alternative embodiments, when determining the deviation of the safety isolation product, the controller can determine the deviation of the safety isolation product based on multiple actual output values ​​of the safety isolation product collected by the signal acquisition device and the corresponding target output values, so as to improve the accuracy of deviation calculation.

[0048] In one embodiment, the deviation between each actual output value and its corresponding target output value can be calculated separately. Then, the average deviation of multiple actual output values ​​from their corresponding target output values ​​can be calculated, and this average deviation is determined as the final deviation calculation result. Alternatively, the maximum deviation among the multiple actual output values ​​from their corresponding target output values ​​can also be used as the final deviation calculation result. The specific choice can be made according to actual needs, but preferably, the average deviation is determined as the final deviation calculation result.

[0049] In another embodiment, a true output curve can be fitted based on multiple actual output values; then, the deviation of the security isolation product within the target time period can be determined based on the true output curve and the corresponding target output curve. Here, the target output curve includes the target output value. The target time period is the time period corresponding to multiple actual output values. For example, the target time period can be the time period between a first time corresponding to a first actual output value and a second time corresponding to a second actual output value. Here, the first actual output value is the output value with the earliest acquisition time among the multiple actual output values, and the second actual output value is the output value with the latest acquisition time among the multiple actual output values.

[0050] By fitting discrete actual output values ​​to obtain a continuously changing true output curve, continuous and universal patterns can be extracted from discrete and noisy observations. This curve can better reveal the trend characteristics of output value changes. Based on the true output curve and the corresponding target output curve, the deviation of the safety isolation product within the target time period can be determined, thus improving the accuracy of the deviation determination results.

[0051] Specifically, after obtaining the actual output curve, the first output value at multiple target times in the actual output curve and the second output value at multiple target times in the target output curve can be determined. Then, based on the first and second output values, the deviation of the safety isolation product within the target time period is determined. For example, the deviation between each first output value and the second output value at the same time is calculated, and the average deviation of all first output values ​​and the second output values ​​at the same time is used as the final deviation determination result. The target time mentioned here is the time corresponding to each actual output value.

[0052] In some alternative embodiments, the calibration results can be verified in real time during the calibration process of the security isolation product to determine whether the calibration accuracy meets the requirements.

[0053] For example, during the calibration of a safety isolation product, the controller can continue to control the signal input device to send a standard signal to the safety isolation product. Simultaneously, the signal acquisition device collects the new actual output value of the safety isolation product in real time and sends it to the controller. The controller calculates a second deviation between the new actual output value and the corresponding target output value, and determines whether the calibration accuracy meets the requirements based on this second deviation. If the requirements are met, the controller controls the calibration equipment to stop the calibration operation; if the requirements are not met, the controller re-determines the corresponding operating parameters and controls the calibration equipment to perform the calibration operation based on the new operating parameters, adjusting the resistance value of the target resistor. This cycle continues until the calibration result meets the requirements.

[0054] The method for determining the second deviation can be the same as the method for determining the first deviation, so it will not be repeated here.

[0055] In this embodiment, a closed-loop feedback mechanism can be introduced during the calibration process to compensate for nonlinear changes during the resistance adjustment process in real time, making each correction and adjustment accurate and reliable. This ensures that the output value of the safety isolation product is strictly controlled within the target tolerance range, avoiding problems of under-calibration or over-calibration.

[0056] In some alternative embodiments, the calibration device may include a stepper motor and a reducer, and the target resistor may be a mechanically adjustable potentiometer.

[0057] The controller can determine the operating parameters of the stepper motor based on the deviation of the safety isolation product, and control the stepper motor drive reducer based on the operating parameters to rotate the knob of the mechanical adjustable potentiometer to adjust the resistance value.

[0058] The controller combines the deviations calculated during the calibration process and uses a PID algorithm to control the motor's start and stop until the safety isolation product's accuracy meets the standard, forming a closed loop of "error detection - motor adjustment - feedback verification".

[0059] In some alternative embodiments, the calibration device can be a laser etching device, which can be a high-precision laser trimming device. Correspondingly, the target resistor can be an etchable resistor, such as a chip resistor.

[0060] Potentiometers rely on mechanical sliding contacts to adjust resistance. In the environments of petroleum and chemical plants, with their vibration, high temperature, low temperature, and humidity changes, the contacts are prone to oxidation, wear, or loosening, resulting in poor long-term product stability and difficulty in guaranteeing accuracy.

[0061] Using laser direct etching to create high-precision, low-drift etchable resistors, replacing manual adjustment of mechanical potentiometers, can fundamentally solve the problems of low precision and susceptibility to environmental and vibration-induced drift in potentiometers, enabling product precision to stably reach 0.05% or even higher.

[0062] Etchable resistors typically employ thick-film / thin-film printing processes, achieving an initial accuracy of ≤±1%. Combined with the ±0.01% etching accuracy of laser etching devices, this allows the output error of safety isolation products to be stably controlled within ≤0.03%FS (Full Span). In contrast, the limit for manually adjusting high-precision potentiometers is 0.1%. Furthermore, etchable resistors are inexpensive, costing only a few cents, while high-precision potentiometers cost >2 yuan each. Therefore, this solution enables accuracy calibration of safety isolation products while reducing calibration costs.

[0063] The calibration process for safety isolation products is described below using laser calibration as an example.

[0064] S1: Install the safety isolation product to be calibrated onto the integrated test fixture, and start the calibration software in the controller to complete the equipment self-test and parameter setting.

[0065] S2: The controller controls the signal input device to inject a standard signal into the safety isolation product to be calibrated, and at the same time controls the signal acquisition device to acquire the actual output signal of the safety isolation product.

[0066] S3: The controller compares the actual output value collected by the data processing unit with the preset target output value and calculates the deviation (Δ). Based on this deviation Δ, the intelligent decision algorithm unit calculates in real time the etching working parameters such as laser etching path, length, depth, laser power, and stepping speed required to eliminate the deviation, and generates specific control commands to send to the laser etching device.

[0067] S4: The laser etching device etches the calibration resistor according to the etching working parameters (i.e., etch the resistor).

[0068] S5: The intelligent decision-making algorithm unit determines whether the new output deviation of the safety isolation product has entered the preset accuracy tolerance range.

[0069] If so, the system determines that the adjustment of the test point is complete, and can proceed to the adjustment of the next test point or end the entire calibration process for the product.

[0070] If not, the process returns to steps S2-S4, and the next laser etching fine-tuning is performed based on the latest deviation, forming a fast and high-precision closed loop of "measurement-decision-execution-verification" until the target is met.

[0071] S6: The controller automatically stores calibration data and generates calibration reports for relevant personnel to view.

[0072] The calibration data may include, but is not limited to: calibration time, serial number of the safety isolation product, standard / actual / error values ​​of each signal point, and cutting parameters.

[0073] The embodiments of this application adopt an automated approach to complete the entire process of "signal input - intelligent decision-making - resistance adjustment - cyclic verification", realizing seamless connection and automated operation of the entire process from tooling, testing, decision-making, resistance adjustment to verification. The calibration time of a single product is significantly shortened, and the calibration efficiency and consistency of calibration results are improved.

[0074] Exemplary methods This application provides a calibration method for a security isolation product, applied to the controller in the calibration system described above; that is, the calibration method is implemented by the controller. The corresponding calibration system can be found in the description of the above embodiments, and will not be repeated here.

[0075] The method is described in detail below through some embodiments. The following embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0076] like Figure 5 As shown, the method may include steps 501 to 503, as described below: Step 501: Input the standard control signal into the safety isolation product and collect the actual output value of the safety isolation product.

[0077] Step 502: Determine the first deviation of the safety isolation product based on the actual output value and the target output value.

[0078] Step 503: Based on the first deviation, control the calibration device to adjust the resistance value of the target resistor in the fine-tuning circuit.

[0079] In this embodiment, the controller can control the signal input device to input a standard signal to the connected safety isolation product, and control the signal acquisition device to acquire the actual output value of the safety isolation product. Based on the deviation between the actual output value and the target output value (i.e., the first deviation), the controller controls the calibration device to adjust the resistance value of the target resistor in the fine-tuning circuit, thereby achieving automatic calibration of the safety isolation product's accuracy. The calibration method provided in this embodiment, being automated, reduces manual intervention and thus improves calibration efficiency. Furthermore, the unified decision-making by the controller eliminates the dispersion introduced by factors such as operator skill, fatigue, and errors, improving the consistency of performance parameters across all products in the same batch or even different batches, and reducing product rework rates and the risk of products not meeting specifications.

[0080] In some alternative embodiments, when determining the deviation of the safety isolation product, the controller can determine the deviation of the safety isolation product based on multiple actual output values ​​of the safety isolation product collected by the signal acquisition device and the corresponding target output values, so as to improve the accuracy of deviation calculation.

[0081] In one embodiment, the deviation between each actual output value and its corresponding target output value can be calculated separately. Then, the average deviation of multiple actual output values ​​from their corresponding target output values ​​can be calculated, and this average deviation is determined as the final deviation calculation result. Alternatively, the maximum deviation among the multiple actual output values ​​from their corresponding target output values ​​can also be used as the final deviation calculation result. The specific choice can be made according to actual needs, but preferably, the average deviation is determined as the final deviation calculation result.

[0082] In another embodiment, a true output curve can be fitted based on the actual output value; then, the deviation of the safety isolation product can be determined based on the true output curve and the corresponding target output curve, as described below.

[0083] Step 502: Based on the actual output value and the target output value, determine the first deviation of the safety isolation product, which may include steps A1 and A2, as described below: Step A1: Fit the true output curve based on multiple actual output values.

[0084] Step A2: Based on the actual output curve and the target output curve, determine the first deviation of the safety isolation product within the target time period.

[0085] The target output curve mentioned here includes the target output value. The target time period mentioned here is the time period corresponding to multiple actual output values. For example, the target time period can be the time period between the first time corresponding to the first actual output value and the second time corresponding to the second actual output value. Here, the first actual output value is the output value with the earliest acquisition time among multiple actual output values, and the second actual output value is the output value with the latest acquisition time among multiple actual output values.

[0086] By fitting discrete actual output values ​​to obtain a continuously changing true output curve, continuous and universal patterns can be extracted from discrete and noisy observations. This curve can better reveal the trend characteristics of output value changes. Based on the true output curve and the corresponding target output curve, the deviation of the safety isolation product within the target time period can be determined, thus improving the accuracy of the deviation determination results.

[0087] Specifically, after obtaining the actual output curve, the first output value at multiple target times in the actual output curve and the second output value at multiple target times in the target output curve can be determined. Then, based on the first and second output values, the deviation of the safety isolation product within the target time period is determined. For example, the deviation between each first output value and the second output value at the same time is calculated, and the average deviation of all first output values ​​and the second output values ​​at the same time is used as the final deviation determination result. The target time mentioned here is the time corresponding to each actual output value.

[0088] In some alternative embodiments, the calibration results can be verified in real time during the calibration process of the security isolation product to determine whether the calibration accuracy meets the requirements, as described below.

[0089] Step 503: Based on the first deviation, control the calibration device to adjust the resistance value of the target resistor in the fine-tuning circuit, which may include steps B1 and B2, as described below: Step B1: During the process of adjusting the resistance value of the target resistor based on the first deviation control calibration device, the second deviation between the new actual output value and the corresponding target output value is acquired in real time.

[0090] Step B2: Based on the second deviation, adjust the operating parameters of the calibration device so that the calibration device adjusts the resistance value of the target resistor based on the adjusted operating parameters.

[0091] During the calibration of the safety isolation product, the controller can continue to control the signal input device to send standard signals to the safety isolation product. Simultaneously, the signal acquisition device collects the new actual output value of the safety isolation product in real time and sends it to the controller. The controller calculates the second deviation between the new actual output value and the corresponding target output value, and determines whether the calibration accuracy meets the requirements based on this second deviation. If the requirements are met, the controller controls the calibration equipment to stop the calibration operation; if the requirements are not met, the controller re-determines the corresponding operating parameters and controls the calibration equipment to perform the calibration operation based on the new operating parameters, adjusting the resistance value of the target resistor. This cycle continues until the calibration result meets the requirements.

[0092] The method for determining the second deviation can be the same as the method for determining the first deviation, so it will not be repeated here.

[0093] In this embodiment, a closed-loop feedback mechanism can be introduced during the calibration process to compensate for nonlinear changes during the resistance adjustment process in real time, making each correction and adjustment accurate and reliable. This ensures that the output value of the safety isolation product is strictly controlled within the target tolerance range, avoiding problems of under-calibration or over-calibration.

[0094] In some alternative embodiments, the calibration device may include a stepper motor and a reducer, and the target resistor may be a mechanically adjustable potentiometer.

[0095] The controller can determine the operating parameters of the stepper motor based on the deviation of the safety isolation product, and control the stepper motor drive reducer based on the operating parameters to rotate the knob of the mechanical adjustable potentiometer to adjust the resistance value.

[0096] The controller combines the deviations calculated during the calibration process and uses a PID algorithm to control the motor's start and stop until the safety isolation product's accuracy meets the standard, forming a closed loop of "error detection - motor adjustment - feedback verification".

[0097] In some alternative embodiments, the calibration device can be a laser etching device, which can be a high-precision laser trimming device. Correspondingly, the target resistor can be an etchable resistor, such as a chip resistor.

[0098] Potentiometers rely on mechanical sliding contacts to adjust resistance. In the environments of petroleum and chemical plants, with their vibration, high temperature, low temperature, and humidity changes, the contacts are prone to oxidation, wear, or loosening, resulting in poor long-term product stability and difficulty in guaranteeing accuracy.

[0099] Using laser direct etching to create high-precision, low-drift etchable resistors, replacing manual adjustment of mechanical potentiometers, can fundamentally solve the problems of low precision and susceptibility to environmental and vibration-induced drift in potentiometers, enabling product precision to stably reach 0.05% or even higher.

[0100] In summary, the calibration method for the safety isolation product provided in this application adopts an automated approach to complete the entire process of "signal input - intelligent decision-making - resistance adjustment - cyclic verification". This achieves seamless integration and automated operation of the entire process from tooling, testing, decision-making, resistance adjustment to verification. The calibration time for a single product is significantly shortened, and the calibration efficiency and consistency of calibration results are improved.

[0101] Exemplary device Accordingly, this application also provides a calibration device for a security isolation product, applied to the controller in the calibration system described above. The corresponding calibration system can be found in the description of the above embodiments. like Figure 6 As shown, the device may include: The signal acquisition module 601 is used to control the input of standard signals to the security isolation product and to acquire the actual output value of the security isolation product.

[0102] Deviation determination module 602 is used to determine the first deviation of the safety isolation product based on the actual output value and the target output value.

[0103] The calibration module 603 is used to control the calibration device to adjust the resistance value of the target resistor in the fine-tuning circuit based on the first deviation.

[0104] In some alternative embodiments, the calibration module 603 may be specifically used for: During the process of adjusting the resistance value of the target resistor by the calibration device based on the first deviation, a second deviation between the new actual output value and the corresponding target output value is acquired in real time; based on the second deviation, the operating parameters of the calibration device are adjusted so that the calibration device adjusts the resistance value of the target resistor based on the adjusted operating parameters.

[0105] In some alternative embodiments, the deviation determination module 602 may be specifically used for: A true output curve is obtained by fitting multiple actual output values; a first deviation of the security isolation product within a target time period is determined based on the true output curve and the target output curve; wherein, the target output curve includes the target output value; and the target time period is the time period corresponding to the multiple actual output values.

[0106] In some alternative embodiments, the calibration device is a laser etching device, and the target resistor is an etchable resistor.

[0107] In some alternative embodiments, the calibration device includes a stepper motor and a reducer, wherein the target resistor is a mechanically adjustable potentiometer; the stepper motor drives the reducer to rotate the knob of the mechanically adjustable potentiometer to adjust the resistance value.

[0108] The calibration device for the security isolation product provided in this embodiment belongs to the same concept as the calibration method for the security isolation product provided in the above embodiments of this application. It can execute the calibration method for the security isolation product provided in any of the above embodiments of this application and has the corresponding functional modules and beneficial effects of the execution method. Technical details not described in detail in this embodiment can be found in the specific processing content of the calibration method for the security isolation product provided in the above embodiments of this application, and will not be repeated here.

[0109] Exemplary electronic devices This application also provides an electronic device, such as... Figure 7 As shown, the electronic device includes a memory 700 and a processor 710.

[0110] The memory 700 is connected to the processor 710 and is used to store programs.

[0111] The processor 710 is used to implement the calibration method for the security isolation product in the above embodiments by running the program stored in the memory 700.

[0112] Specifically, the aforementioned electronic device may also include: a communication interface 720, an input device 730, an output device 740, and a bus 750.

[0113] The processor 710, memory 700, communication interface 720, input device 730, and output device 740 are interconnected via a bus. Among them: Bus 750 may include a pathway for transmitting information between various components of a computer system.

[0114] The processor 710 can be a general-purpose processor, such as a general-purpose central processing unit (CPU), a microprocessor, etc., or an application-specific integrated circuit (ASIC), or one or more integrated circuits used to control the execution of the program of the present invention. It can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0115] The processor 710 may include a main processor, as well as a baseband chip, modem, etc.

[0116] The memory 700 stores a program that executes the technical solution of this invention, and may also store an operating system and other key business functions. Specifically, the program may include program code, which includes computer operation instructions. More specifically, the memory 700 may include read-only memory (ROM), other types of static storage devices capable of storing static information and instructions, random access memory (RAM), other types of dynamic storage devices capable of storing information and instructions, disk storage, flash memory, etc.

[0117] Input device 730 may include a device for receiving data and information input by a user, such as a keyboard, mouse, camera, scanner, light pen, voice input device, touch screen, pedometer, or gravity sensor.

[0118] Output device 740 may include devices that allow information to be output to a user, such as a display screen, printer, speaker, etc.

[0119] The communication interface 720 may include a device that uses any transceiver to communicate with other devices or communication networks, such as Ethernet, Radio Access Network (RAN), Wireless Local Area Network (WLAN), etc.

[0120] The processor 710 executes the program stored in the memory 700 and calls other devices, which can be used to implement the various steps of the calibration method for the security isolation product provided in the above embodiments of this application.

[0121] Exemplary computer program products and storage media In addition to the methods and devices described above, embodiments of this application may also be computer program products, which include computer program instructions that, when executed by a processor, cause the processor to perform the steps in the calibration method for the security isolation product described in the embodiments of this application.

[0122] The aforementioned computer program product can be implemented through hardware, software, or a combination thereof. In one optional embodiment, the computer program product is specifically embodied in a computer storage medium; in another optional embodiment, the computer program product is specifically embodied in a software product, such as a software development kit (SDK), etc.

[0123] The computer program product can be written in any combination of one or more programming languages ​​to perform the operations of the embodiments of this application. The programming languages ​​include object-oriented programming languages ​​such as Java and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0124] Furthermore, embodiments of this application may also be storage media storing a computer program, which is executed by a processor in the calibration method for the security isolation product described in the embodiments of this application.

[0125] In addition, embodiments of this application may also be chips, which include processors and data interfaces. The processor reads instructions stored in the memory through the data interface to execute the steps in the calibration method of the security isolation product described in the embodiments of this application.

[0126] For the foregoing method embodiments, in order to simplify the description, they are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, because according to this application, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0127] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For apparatus embodiments, since they are basically similar to method embodiments, the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0128] The steps in the methods of the various embodiments of this application can be adjusted, merged, or deleted in order according to actual needs, and the technical features described in each embodiment can be replaced or combined.

[0129] The modules and sub-modules in the devices and terminals in the various embodiments of this application can be merged, divided, and deleted according to actual needs.

[0130] It should be understood that the disclosed terminals, devices, and methods can be implemented in other ways, given the several embodiments provided in this application. For example, the terminal embodiments described above are merely illustrative. For instance, the division of modules or sub-modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple sub-modules or modules may be combined or integrated into another module, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or modules, and may be electrical, mechanical, or other forms.

[0131] The modules or submodules described as separate components may or may not be physically separate. The components that constitute a module or submodule may or may not be physical modules or submodules; that is, they may be located in one place or distributed across multiple network modules or submodules. Some or all of the modules or submodules can be selected to achieve the purpose of this embodiment's solution, depending on actual needs.

[0132] Furthermore, the functional modules or sub-modules in the various embodiments of this application can be integrated into one processing module, or each module or sub-module can exist physically separately, or two or more modules or sub-modules can be integrated into one module. The integrated modules or sub-modules described above can be implemented in hardware or in the form of software functional modules or sub-modules.

[0133] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0134] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented directly by hardware, a software unit executed by a processor, or a combination of both. The software unit can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0135] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A calibration method for a safety isolation product, characterized in that, The method includes: The control standard signal is input to the security isolation product, and the actual output value of the security isolation product is collected; Based on the actual output value and the target output value, determine the first deviation of the security isolation product; Based on the first deviation, the control calibration device adjusts the resistance value of the target resistor in the fine-tuning circuit.

2. The calibration method for the safety isolation product according to claim 1, characterized in that, The step of controlling the calibration device to adjust the resistance value of the target resistor in the fine-tuning circuit based on the first deviation includes: During the process of adjusting the resistance value of the target resistor by controlling the calibration device based on the first deviation, the second deviation between the new actual output value and the corresponding target output value is acquired in real time; Based on the second deviation, the operating parameters of the calibration device are adjusted so that the calibration device adjusts the resistance value of the target resistor based on the adjusted operating parameters.

3. The calibration method for the safety isolation product according to claim 1, characterized in that, The step of determining the first deviation of the security isolation product based on the actual output value and the target output value includes: Based on multiple actual output values, a true output curve is obtained by fitting. Based on the actual output curve and the target output curve, a first deviation of the security isolation product within a target time period is determined; wherein, the target output curve includes the target output value; and the target time period is the time period corresponding to the plurality of actual output values.

4. The calibration method for the safety isolation product according to any one of claims 1 to 3, characterized in that, The calibration device is a laser etching device, and the target resistor is an etchable resistor.

5. The calibration method for the safety isolation product according to any one of claims 1 to 3, characterized in that, The calibration device includes a stepper motor and a reducer, and the target resistor is a mechanically adjustable potentiometer; The stepper motor drives the reducer to rotate the knob of the mechanical adjustable potentiometer to adjust the resistance value.

6. A calibration system for a safety isolation product, characterized in that, include: The system includes a controller, a signal input device, a signal acquisition device, a safety isolation product, and a calibration device, wherein the controller and the safety isolation product are respectively connected to the signal input device, the signal acquisition device, and the calibration device; The controller is used to control the signal input device to input standard signals into the security isolation product connected to it; The signal acquisition device is used to acquire the actual output value of the security isolation product connected to it, and send the actual output value to the controller; The controller is also used to determine a first deviation of the safety isolation product based on the actual output value and the target output value, and based on the first deviation, control the calibration device to adjust the resistance value of the target resistor in the fine-tuning circuit.

7. The calibration system for a safety isolation product according to claim 6, characterized in that, The calibration device is a laser etching device, and the target resistor is an etchable resistor; The controller is specifically used to determine the operating parameters of the laser etching device based on the first deviation, and send control commands to the laser etching device to control the laser etching device to adjust the resistance value of the target resistor in the fine-tuning circuit according to the operating parameters.

8. The calibration system for a security isolation product according to claim 6, characterized in that, The calibration device includes a stepper motor and a reducer, and the target resistor is a mechanically adjustable potentiometer; The controller is specifically used to determine the operating parameters of the stepper motor based on the first deviation, and send control to the stepper motor to control the stepper motor to drive the reducer to rotate the knob of its mechanical adjustable potentiometer to adjust the resistance value.

9. An electronic device, characterized in that, include: Memory and processor; The memory is connected to the processor and is used to store programs; The processor is used to implement the calibration method for the security isolation product as described in any one of claims 1 to 5 by running a program in the memory.

10. A computer program product, characterized in that, The computer program product stores a computer program, which, when executed by a processor, implements the calibration method for the security isolation product as described in any one of claims 1 to 5.

Images