Sensor detection device

Abstract

The utility model provides a sensor detection device, which comprises a detector body and a circuit board arranged in the detector body, a preset circuit is recorded on the circuit board, and the detector body is provided with a first port, a second port, an analysis module and a display module. The first port and the second port are respectively arranged at two sides of a sensor to be tested so as to access the sensor to be tested to the preset circuit, an input end of the analysis module is connected with the first port and the second port, an output end of the analysis module is connected with the display module, and the display module is connected with the display module. The preset circuit comprises a power supply circuit and N test circuits, N is an integer greater than 1, and the power supply circuit is electrically connected with the N test circuits; multiple performance tests can be performed on the to-be-tested sensor through one sensor detection device, so that the steps of frequently replacing the detection device and repeatedly debugging are reduced, and the convenience of the sensor detection device is improved.

Description

Technical Field

[0001] The utility model relates to the field of detection technology, in particular to a sensor detection device. Background Art

[0002] With the development of electronic technology, many sensors (such as pressure, temperature, liquid level, flow sensors, etc.) are usually deployed on production lines. By deploying sensors, more intelligent, refined, and efficient production management can be achieved, which helps to improve the core competitiveness of enterprises. Therefore, regular calibration and troubleshooting of various sensors on the production line play an important role in ensuring the accuracy and stability of industrial process control systems. However, the existing sensor detection devices have a single function, making it difficult to flexibly perform multiple tests on sensors, and have the problem of poor convenience. Utility Model Content

[0003] The main purpose of the utility model is to provide a sensor detection device, aiming to solve the problem that the existing sensor detection devices are less convenient.

[0004] To achieve the above-mentioned purpose, the utility model provides a sensor detection device, comprising: a detector body and a circuit board arranged in the detector body, a preset circuit being recorded on the circuit board, a first port, a second port, an analysis module and a display module being arranged on the detector body, the first port and the second port being arranged on both sides of a sensor to be tested, respectively, so as to connect the sensor to be tested to the preset circuit, an input end of the analysis module being connected to the first port and the second port, an output end of the analysis module being connected to the display module, the preset circuit comprising a power supply circuit and N test circuits, N being an integer greater than 1, and the power supply circuit being electrically connected to the N test circuits;

[0005] When the sensor to be tested is detected, the input end of the analysis module obtains the electrical data measured by the N test circuits on the sensor to be tested respectively through the first port and the second port, and the analysis module is used to determine the test result of the sensor to be tested according to the electrical data. The display module receives and displays the N test results corresponding to the sensor to be tested in the N test circuits respectively through the output end of the analysis module.

[0006] Optionally, a control circuit is provided in the analysis module, and M test ports are provided on the control circuit. Each test circuit is electrically connected to a test port, and M is an integer greater than or equal to N.

[0007] Optionally, the N test circuits include a reverse connection protection test circuit, and the reverse connection protection test circuit is electrically connected to the first test port of the control circuit;

[0008] When performing a reverse connection protection test on the sensor to be tested, the input end of the analysis module obtains the first current value and the second current value measured by the reverse connection protection test circuit on the sensor to be tested through the first port and the second port, and the current direction corresponding to the first current value is opposite to the current direction corresponding to the second current value.

[0009] Optionally, the N test circuits include a limit operating voltage test circuit, and the limit operating voltage test circuit is electrically connected to the second test port of the control circuit;

[0010] When the sensor to be tested is subjected to a limit working voltage test, the voltage output to the limit working voltage test circuit is adjusted to a first voltage value or a second voltage value through the power supply circuit, and the input end of the analysis module obtains a third current value measured by the limit working voltage test circuit for the sensor to be tested through the first port and the second port, the first voltage value is the upper limit working voltage value of the sensor to be tested, and the second voltage value is the lower limit working voltage value of the sensor to be tested.

[0011] Optionally, the N test circuits include an energy consumption test circuit, and the energy consumption test circuit is electrically connected to the third test port of the control circuit;

[0012] When performing an energy consumption test on the sensor to be tested, the input end of the analysis module obtains a fourth current value measured by the energy consumption test circuit on the sensor to be tested through the first port and the second port, and the fourth current value is a current value when the sensor to be tested is not loaded.

[0013] Optionally, the N test circuits include a load test circuit, and the load test circuit is electrically connected to the fourth test port of the control circuit;

[0014] When the sensor to be tested is subjected to a load test, the input end of the analysis module obtains a fifth current value measured by the load test circuit on the sensor to be tested through the first port and the second port, and the fifth current value is the current value of the sensor to be tested under a load of the nominal load value.

[0015] Optionally, the N test circuits include an overload test circuit, and the overload test circuit is electrically connected to the fifth test port of the control circuit;

[0016] When the sensor to be tested is subjected to an overload test, the input end of the analysis module obtains a sixth current value measured by the overload test circuit on the sensor to be tested through the first port and the second port, and the sixth current value is the maximum operating current value of the sensor to be tested when the load value is gradually reduced.

[0017] Optionally, the N test circuits include a residual voltage test circuit, and the residual voltage test circuit is electrically connected to the sixth test port of the control circuit;

[0018] When performing a residual voltage test on the sensor to be tested, the input end of the analysis module obtains the residual voltage measured by the residual voltage test circuit on the sensor to be tested through the first port and the second port, and the residual voltage is the voltage value of the sensor to be tested when the control circuit controls the residual voltage test circuit to be disconnected from the power supply circuit.

[0019] Optionally, the N test circuits include a leakage test circuit, and the leakage test circuit is electrically connected to the seventh test port of the control circuit;

[0020] When a leakage test is performed on the sensor to be tested, the input end of the analysis module obtains the seventh current value measured by the leakage test circuit on the sensor to be tested through the first port and the second port, and the seventh current value is the current value of the sensor to be tested when it is disconnected.

[0021] Optionally, the N test circuits include a sensor type detection circuit, and the sensor type detection circuit is electrically connected to an eighth test port of the control circuit;

[0022] When the type of the sensor to be tested is detected, the input end of the analysis module obtains the level value measured by the sensor type detection circuit on the sensor to be tested through the first port and the second port, and the level value is used to determine the type of the sensor to be tested.

[0023] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0024] The utility model provides a sensor detection device, comprising: a detector body and a circuit board arranged in the detector body, a preset circuit is recorded on the circuit board, a first port, a second port, an analysis module and a display module are arranged on the detector body, the first port and the second port are respectively arranged on both sides of a sensor to be tested, so as to connect the sensor to be tested to the preset circuit, an input end of the analysis module is connected to the first port and the second port, an output end of the analysis module is connected to the display module, the preset circuit comprises a power supply circuit and N test circuits, N is an integer greater than 1, and the power supply circuit is electrically connected to the N test circuits; when the sensor to be tested is detected, the input end of the analysis module obtains electrical data measured by the N test circuits on the sensor to be tested respectively through the first port and the second port, the analysis module is used to determine the test result of the sensor to be tested according to the electrical data, and the display module receives and displays the N test results of the sensor to be tested corresponding to the N test circuits respectively through the output end of the analysis module. In the embodiment of the utility model, in the preset circuit set on the circuit board, N test circuits are set to perform N performance tests on the sensor to be tested, and the power supply circuit can provide power support during the test. In the case of performance testing of the sensor to be tested, the input end of the analysis module connects the sensor to be tested to the preset circuit through the first port 102 and the second port 103 to obtain the electrical data measured by the N test circuits for the sensor to be tested respectively; and the obtained electrical data is processed by the analysis module to determine the test results of the sensor to be tested; then the display module 104 receives and displays the N test results corresponding to the N test circuits of the sensor to be tested through the output end of the analysis module. In this way, a variety of performance tests can be performed on the sensor to be tested through a sensor detection device, reducing the steps of frequent replacement of the detection device and repeated debugging, thereby improving the convenience of the sensor detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the scheme in the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 It is a structural schematic diagram of a sensor detection device provided by an embodiment of the utility model;

[0027] Figure 2 It is one of the circuit diagrams of a test circuit provided by an embodiment of the utility model;

[0028] Figure 3This is a second circuit diagram of a test circuit provided by an embodiment of the utility model;

[0029] Figure 4 This is a third circuit diagram of a test circuit provided by an embodiment of the utility model;

[0030] Figure 5 This is a fourth circuit diagram of a test circuit provided by an embodiment of the utility model;

[0031] Figure 6 This is a circuit diagram of a test circuit provided by an embodiment of the utility model;

[0032] Figure 7 This is a sixth circuit diagram of a test circuit provided by an embodiment of the utility model;

[0033] Figure 8 This is the seventh circuit diagram of a test circuit provided by an embodiment of the utility model;

[0034] Fig. 9 This is the eighth circuit diagram of a test circuit provided by an embodiment of the utility model;

[0035] Fig.10 This is a ninth circuit diagram of a test circuit provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0036] All technical and scientific terms used herein have the same meanings as those commonly understood by technicians in the technical field of the present application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0037] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0038] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0039] The utility model provides a sensor detection device, such as Figure 1 As shown, it includes: a detector body 101 and a circuit board arranged in the detector body 101, a preset circuit is recorded on the circuit board, a first port 102, a second port 103, an analysis module and a display module 104 are arranged on the detector body, the first port 102 and the second port 103 are respectively arranged on both sides of the sensor to be tested, so as to connect the sensor to be tested to the preset circuit, the input end of the analysis module is connected to the first port 102 and the second port 103, the output end of the analysis module is connected to the display module 104, the preset circuit includes a power supply circuit and N test circuits, N is an integer greater than 1, and the power supply circuit is electrically connected to the N test circuits;

[0040] When the sensor to be tested is detected, the input end of the analysis module obtains the electrical data measured by the N test circuits on the sensor to be tested respectively through the first port 102 and the second port 103, and the analysis module is used to determine the test result of the sensor to be tested according to the electrical data. The display module 104 receives and displays the N test results corresponding to the sensor to be tested in the N test circuits respectively through the output end of the analysis module.

[0041] In one example, a power switch 105, a reset switch 106 and an automatic detection switch 107 may also be provided in the detector body 101, and the power switch 105, the reset switch 106 and the automatic detection switch 107 are all connected to the preset circuit on the circuit board. The power switch 105 can be used to control the opening and closing of the power supply circuit, thereby realizing the power on and off of the sensor detection device; the automatic detection switch 107 can be used to control the analysis module to obtain the electrical data measured by N test circuits for the sensor to be tested, respectively, to determine the test results of the sensor to be tested, and only one-click activation of the automatic detection switch 107 is required to test various indicators of the sensor, and all the tested data can be displayed on the serial port screen; the reset switch 106 can be used to reset the test results of the determined sensor to be tested, so as to facilitate the next test.

[0042] In one example, the display module 104 can be a digital tube or an indicator light. Compared with the serial port screen, the digital tube or the indicator light has a simple structure and a relatively low manufacturing cost. If the project budget is limited, or only simple numerical values ​​or status information need to be displayed, the use of a digital tube instead of a serial port screen can save expenses on hardware costs. In addition, the digital tube is usually a discrete component, each segment is independently controlled, and power is consumed only when displaying numbers or symbols. Compared with the serial port screen (especially display screens such as color TFT or OLED), the digital tube is more energy-efficient in low-power applications. Digital tubes are usually more robust, without liquid crystal layers and complex drive circuits, so they often show better durability and stability under harsh environmental conditions (such as high and low temperatures, vibrations, shocks, etc.). Digital tubes can be designed into a variety of shapes and sizes, including seven-segment digital tubes, sixteen-segment digital tubes, etc., which are suitable for occasions with small spaces or specific shape requirements. Moreover, due to the simple structure, installation and layout are more flexible.

[0043] In an embodiment of the utility model, a sensor detection device is provided. In a preset circuit set on a circuit board, N test circuits are set to perform N performance tests on the sensor to be tested, and the power supply circuit can provide power support during the test. When the performance test of the sensor to be tested is performed, the input end of the analysis module connects the sensor to be tested to the preset circuit through the first port 102 and the second port 103 to obtain the electrical data measured by the N test circuits for the sensor to be tested respectively; and the obtained electrical data is processed by the analysis module to determine the test results of the sensor to be tested; then the display module 104 receives and displays the N test results corresponding to the N test circuits of the sensor to be tested respectively through the output end of the analysis module. In this way, a variety of performance tests can be performed on the sensor to be tested through a sensor detection device, which reduces the steps of frequent replacement of the detection device and repeated debugging, thereby improving the convenience of the sensor detection device.

[0044] For example, Figures 2 to 5As shown, the power supply circuit can use 30V input to two DCDCs, and one DCDC supports an adjustable output voltage +VCC. The principle is to use an op amp to build an open-loop gain circuit similar to a comparator to compare with the FB of DCDC, and map 30V proportionally to 3.3V of the microcontroller. For example, if 12V needs to be output, 12V is 40% of 30V, then the microcontroller IO needs to output a square wave with a duty cycle of 40%. Use an op amp to build a comparator + higher than -, OUT output is high, FB becomes low, and +VCC becomes high. Constant current part: OC is 500ma, the current detection resistor is 200mΩ, then the voltage of the op amp 5 pin is 0.5*0.2=0.1V, then the 6th pin should be divided by 0.1V. Map the 0.1V here to the 100% duty cycle of the microcontroller. If it exceeds 100%, the protection is disconnected to achieve overcurrent protection of the entire tooling. One DCDC generates 5V, and 5V is fed to LDO to generate 3.3V to power the MCU. The principle is a normal DCDC step-down circuit.

[0045] Optionally, a control circuit is provided in the analysis module, and M test ports are provided on the control circuit. Each test circuit is electrically connected to a test port, and M is an integer greater than or equal to N.

[0046] In this embodiment, the control circuit may be a single chip control circuit, such as Figure 6 As shown. The control circuit may also include a clock circuit, a one-button test circuit, a reset circuit, a control relay circuit, a control 595 drive, an I2C bus, a burning port, etc. When M is greater than N, the test circuit can be expanded on the control circuit. The 74HC595 can be controlled by three single-chip microcomputer IO ports to cascade out 32 drive ports for driving the MOS tube load. In this way, a sensor detection device can be used to perform a variety of performance tests on the sensor to be tested, reducing the steps of frequent replacement of the detection device and repeated debugging. In addition, M test ports are provided on the control circuit. When M is greater than N, more test circuits can be easily integrated, and the flexible expansion of the performance test of the sensor to be tested is realized by expanding the interface. At the same time, it ensures that the sensor detection device has good compatibility and sustainable development potential, and improves the convenience of the sensor detection device.

[0047] In some optional embodiments, the N test circuits may include a reverse connection protection test circuit, a limit working voltage test circuit, an energy consumption test circuit, a load test circuit, an overload test circuit, a residual voltage test circuit, a leakage test circuit, and a sensor type detection circuit, such as Figures 7 to 10As shown. In other words, N can be 8. The automatic detection switch 107 can be used to control the analysis module to obtain the electrical data measured by N test circuits on the sensors to be tested, so as to determine the test results of the sensors to be tested. The automatic detection switch 107 can be started with one button to test various indicators of the sensor, and all the tested data can be displayed on the serial port screen; the test results of the determined sensors to be tested can be reset by the reset switch 106 to facilitate the next test. A variety of performance tests can be performed on the sensors to be tested through a sensor detection device, which reduces the steps of frequent replacement of detection devices and repeated debugging, thereby improving the convenience of the sensor detection device. For details, please refer to the following description:

[0048] In one example, the N test circuits include a reverse connection protection test circuit, and the reverse connection protection test circuit is electrically connected to the first test port of the control circuit;

[0049] In the case of performing a reverse connection protection test on the sensor to be tested, the input end of the analysis module obtains the first current value and the second current value measured by the reverse connection protection test circuit on the sensor to be tested through the first port and the second port, and the current direction corresponding to the first current value is opposite to the current direction corresponding to the second current value. The current direction corresponding to the first current value can be a forward current, and the direction corresponding to the second current value can be a reverse current, that is, the positive and negative poles of the power supply of the sensor to be tested are changed by the sensor detection device, and then the first current value of the sensor to be tested in the forward current measurement and the second current value in the reverse current measurement are verified to determine whether the sensor to be tested supports reverse connection protection. The specific description can be as follows:

[0050] In the forward current measurement, the rated forward voltage can be applied to the sensor from the first port. Ensure that the sensor to be tested is in normal working condition and all parameters such as current and voltage are within the normal operating range. The analysis module reads the current value (first current value) at this time through the first port. Record the current value and the application data for comparison reference. In the reverse current measurement, the same voltage can be applied in the reverse direction from the second port to simulate the possible misconnection condition. Check whether the reverse connection protection circuit is effective to prevent the sensor from being damaged by excessive reverse current. The analysis module reads the current value (second current value) at this time through the second port. Record the current value and compare it with the first current value. Among them, compare the first current value and the second current value. Under normal circumstances, if the reverse connection protection is normal, the forward current should be allowed to pass and the reverse current should be blocked / limited. Confirm that the reverse current is much smaller than the forward current or is completely blocked, which indicates that the reverse connection protection is effective. If the second current value is close to zero or very low, it means that the reverse connection protection mechanism is effective. If the second current value is significant, it indicates that there is a problem with the reverse connection protection and the design needs to be improved or the hardware needs to be repaired. In this way, by using an analysis module in combination with the first port and the second port, the reverse connection protection performance of the sensor to be tested can be accurately and efficiently detected and verified, ensuring that the sensor can cut off the abnormal current in time in the case of incorrect connection to prevent damage, thereby improving the reliability and robustness of the system.

[0051] It should be understood that when performing a performance test on the sensor to be tested, the sensor detection device connects the sensor to be tested to the corresponding test circuit through the first port and the second port to form a closed-loop circuit, thereby achieving a performance test on the sensor to be tested.

[0052] In one example, the N test circuits include a limit operating voltage test circuit, and the limit operating voltage test circuit is electrically connected to the second test port of the control circuit;

[0053] When the sensor to be tested is subjected to a limit working voltage test, the voltage output to the limit working voltage test circuit is adjusted to a first voltage value or a second voltage value through the power supply circuit, and the input end of the analysis module obtains a third current value measured by the limit working voltage test circuit for the sensor to be tested through the first port and the second port, the first voltage value is the upper limit working voltage value of the sensor to be tested, and the second voltage value is the lower limit working voltage value of the sensor to be tested.

[0054] In the upper limit working voltage test, the output of the power supply circuit can be adjusted to the upper limit working voltage value (first voltage value) of the sensor to be tested. Ensure that the wiring and equipment configuration are correct and comply with the safety operation regulations. Apply this voltage to the sensor to be tested from the first port. The analysis module reads the current value of the sensor at the upper limit working voltage through the first port and records it as the third current value. In the lower limit working voltage test, the output of the power supply circuit can be adjusted to the lower limit working voltage value (second voltage value) of the sensor to be tested. Apply this voltage to the sensor to be tested from the second port. The analysis module reads the current value of the sensor at the lower limit working voltage through the second port and re-records the third current value. The analysis module summarizes the third current value data under the two voltage conditions and records it as: [I_{\text{upper}}:\text{current at the upper limit working voltage}][I_{\text{lower}}:\text{current at the lower limit working voltage}]. For example, taking the sensor to be tested of 24V±10% as an example, the current under the upper limit working voltage is I1_{\text{26.4V}}, and the current under the lower limit working voltage is I2_{\text{21.6V}}. The sensor detection device first adjusts the voltage output to the sensor to be tested to 26.4V through the power supply circuit, that is, the current of the sensor to be tested under the upper limit working voltage is I1_{\text{26.4V}}, and then verifies whether the sensor to be tested can operate normally at this time; if the sensor to be tested operates abnormally, the result that the sensor to be tested fails to pass the upper limit working voltage test is output; if the sensor to be tested operates normally, the voltage output to the sensor to be tested is further adjusted to 21.6V through the power supply circuit, that is, the current of the sensor to be tested under the lower limit working voltage is I2_{\text{21.6V}}, and then verifies whether the sensor to be tested can operate normally at this time; if the sensor to be tested operates abnormally, the result that the sensor to be tested fails to pass the lower limit working voltage test is output; if the sensor to be tested operates normally, the result that the sensor to be tested passes the limit working voltage test is output. This test method can not only effectively evaluate the current response of the sensor under defined upper and lower voltage limits, but also ensure through data analysis that the sensor can still operate normally even under extreme conditions in its operating voltage range, and will not fail due to voltage fluctuations in actual applications. This will promote the improvement of the reliability and robustness of the sensor and provide valuable data support for subsequent design and application.

[0055] In one example, the N test circuits include an energy consumption test circuit, and the energy consumption test circuit is electrically connected to the third test port of the control circuit;

[0056] When performing an energy consumption test on the sensor to be tested, the input end of the analysis module obtains a fourth current value measured by the energy consumption test circuit on the sensor to be tested through the first port and the second port, and the fourth current value is a current value when the sensor to be tested is not loaded.

[0057] The output voltage can be set to the normal operating voltage of the sensor using a power supply circuit, but no load is applied. Ensure that the wiring and equipment configuration are correct and comply with safety operation regulations. When applying the operating voltage, an appropriate operating voltage can be applied to the sensor from the first port and the second port. Ensure that the sensor is in an unloaded state during the entire test process. When measuring the fourth current value, the analysis module reads the current value of the sensor under no load through the first port and the second port and records it as the fourth current value. The analysis module summarizes the current data under no load to ensure the integrity and accuracy of the data information: [I_{\text{no_load}}:\text{Current value under no load condition}]. Then, the fourth current value and the applied operating voltage value are used to calculate the power consumption of the sensor under no load: [P=V\times I_{\text{no_load}}], where (P) represents the power consumption, (V) is the sensor operating voltage, and (I_{\text{no_load}}) is the current under no load. By comparing the measured data with the design specification or expected value, determine whether the sensor meets the low power design requirements. Further optimization suggestions or evaluations are made based on the power consumption data, including hardware improvements, firmware optimization, etc. In this way, the current of the sensor under no load can be accurately and efficiently detected by combining the first port and the second port using the analysis module, and its energy consumption can be calculated based on this data. This energy consumption test not only helps to evaluate the basic electrical performance of the sensor, but also provides a key reference for optimizing the sensor design, which helps to reduce the overall system energy consumption and improve the economic and environmental performance of the equipment operation.

[0058] In one example, the N test circuits include a load test circuit, and the load test circuit is electrically connected to the fourth test port of the control circuit;

[0059] When the sensor to be tested is subjected to a load test, the input end of the analysis module obtains a fifth current value measured by the load test circuit on the sensor to be tested through the first port and the second port, and the fifth current value is the current value of the sensor to be tested under a load of the nominal load value.

[0060] The sensor to be tested is connected to the load test circuit; the load is adjusted to the nominal load value to ensure that it meets the design specifications of the sensor. The output voltage is set to the normal working voltage of the sensor using the power supply circuit. The load circuit is adjusted so that it applies a load of the nominal load value to the sensor. When applying the working voltage, the working voltage is applied to the sensor from the first port and the second port, and the nominal load is connected at the same time. When measuring the fifth current value, the analysis module reads the current value of the sensor under the nominal load condition through the first port and the second port, and records it as the fifth current value (I_load). The analysis module summarizes the current data under load to ensure that the data information is complete and accurate: [I_{\text{load}}: \text{current value under load conditions}]. Then, the fifth current value and the applied working voltage value are used to calculate the power consumption of the sensor under load: [P=V\times I_{\text{load}}], where (P) represents the power consumption, (V) is the working voltage of the sensor, and (I_{\text{load}}) is the current under load. By comparing the measured data with the design specifications or expected values, it is determined whether the sensor can operate stably under the nominal load. Check whether the sensor has abnormal heating, drift, etc. under long-term load conditions to ensure its reliability. In this way, by using the analysis module in combination with the first port and the second port, the current of the sensor under the nominal load can be accurately and efficiently detected, and its power consumption can be calculated based on this data. This load test not only helps to evaluate the performance of the sensor under actual working conditions, but also helps to identify potential performance bottlenecks and provide key data support for further optimization of the design. Through such load testing, it can be ensured that the reliability and stability of the sensor in the real working environment are improved.

[0061] In one example, the N test circuits include an overload test circuit, and the overload test circuit is electrically connected to the fifth test port of the control circuit;

[0062] When the sensor to be tested is subjected to an overload test, the input end of the analysis module obtains a sixth current value measured by the overload test circuit on the sensor to be tested through the first port and the second port, and the sixth current value is the maximum operating current value of the sensor to be tested when the load value is gradually reduced.

[0063] The sensor to be tested is connected to the overload test circuit; the load adjustment tool is prepared to gradually reduce the load value. The output voltage is set to the normal working voltage of the sensor using the power supply circuit. The load circuit is adjusted so that its initial load is greater than or equal to the nominal load value of the sensor. When the working voltage and the initial high load are applied, the working voltage can be applied to the sensor from the first port and the second port, and the initial set high load is connected. The load is gradually reduced by a predetermined step size, and the working current of the sensor is monitored at the same time. When the maximum working current value is detected and recorded, the analysis module reads the current value in real time. When the current reaches the maximum value and the sensor is still in the working state, the current at this time is recorded as the sixth current value (I_{max_load}). The analysis module summarizes the current data during the process of gradually reducing the load to ensure that the data information is complete and accurate: [I_{\text{max_load}}: \text{The maximum current value recorded during the process of gradually reducing the load}]. Then, I_{\text{max_load}} is compared with the design specification or expected value to confirm whether the sensor can withstand a certain degree of excess load without damage. The consistency and repeatability of multiple tests are detected to ensure reliable performance of the sensor. Observe the working status of the sensor during the process of gradually reducing the load, and check whether there are any abnormal phenomena such as overheating, distortion or sudden failure. Combined with the recorded information, identify the load limit of the sensor and its stability. In this way, the maximum operating current value of the sensor under overload conditions can be accurately and efficiently detected and recorded by combining the first port and the second port using the analysis module. This type of test can not only evaluate the actual performance of the sensor under excessive load, but also help identify its working limits, providing key support for improving design and optimizing applications. In addition, this test can ensure the safety and reliability of the sensor throughout the entire working range, and improve the robustness and adaptability of the overall system.

[0064] In one example, the N test circuits include a residual voltage test circuit, and the residual voltage test circuit is electrically connected to a sixth test port of the control circuit;

[0065] When performing a residual voltage test on the sensor to be tested, the input end of the analysis module obtains the residual voltage measured by the residual voltage test circuit on the sensor to be tested through the first port and the second port, and the residual voltage is the voltage value of the sensor to be tested when the control circuit controls the residual voltage test circuit to be disconnected from the power supply circuit.

[0066] The sensor to be tested is connected to the residual voltage test circuit; the control circuit is configured to control the connection and disconnection of the residual voltage test circuit with the power supply circuit. When the power supply circuit is connected, the output voltage is set to the normal working voltage of the sensor using the power supply circuit to ensure that the sensor is fully charged. When the power supply circuit is disconnected, the power supply circuit is disconnected from the residual voltage test circuit by operating the control circuit, and the voltage change at the moment of disconnection and for a period of time thereafter is recorded. After the power supply is disconnected, the analysis module continuously monitors and records the voltage value of the sensor through the first port and the second port. The stable voltage value is determined and recorded as the residual voltage (V_residual). The analysis module summarizes the voltage change data over time after the power supply is disconnected to ensure that the data information is complete and accurate: [V_{\text{residual}}: \text{stable voltage value recorded for a period of time after the power supply is disconnected}]. Then, the magnitude of the residual voltage is evaluated to determine whether it is consistent with the design specification or expected value. A high residual voltage may indicate that there is a large capacitive effect inside the sensor, and possible leakage paths need to be paid attention to. Compare multiple sensor test results to ensure consistency. Observe the rate at which the voltage drops after the power supply is disconnected. A rapid drop indicates that there is no obvious retained charge inside, while a slow drop requires further investigation of possible energy storage components and their impact. Adjust the sensor design based on the residual voltage data and optimize the energy release path to achieve better stability and performance. Use the analysis module in combination with the first port and the second port to accurately and efficiently detect the residual voltage of the sensor after the power supply is disconnected. This type of test can reveal the energy storage and release characteristics inside the sensor, help identify and solve potential problems, such as capacitance effects or leakage current problems, thereby improving the reliability and performance of the overall sensor design. At the same time, data analysis can also provide empirical support for optimizing sensors and improve their performance in real operating environments.

[0067] In one example, the N test circuits include a leakage test circuit, and the leakage test circuit is electrically connected to the seventh test port of the control circuit;

[0068] When a leakage test is performed on the sensor to be tested, the input end of the analysis module obtains the seventh current value measured by the leakage test circuit on the sensor to be tested through the first port and the second port, and the seventh current value is the current value of the sensor to be tested when it is disconnected.

[0069] The sensor to be tested is connected to the leakage test circuit; the control circuit is configured for power supply and disconnection operation. When the power supply circuit is connected, the power supply circuit is used to provide a normal operating voltage to the sensor to ensure that the sensor reaches a stable state. When the power supply circuit is disconnected, the power supply circuit is disconnected from the sensor to be tested through the control circuit operation, while maintaining the measurement connection to monitor possible leakage current. After the power supply is disconnected, the analysis module monitors and records the current value of the sensor through the first port and the second port. The measured current, which is the seventh current value (I_leak), represents the leakage current of the sensor when it is disconnected. The analysis module summarizes the current data measured after the power supply is disconnected to ensure that the data information is complete and accurate: [I_{\text{leak}}: \text{leakage current value measured when disconnected}]. Then, I_{\text{leak}} is compared with the design specification or expected value to determine whether the sensor meets the leakage standard. High leakage current may indicate that there is an internal circuit short circuit or insulation damage. The consistency of the leakage current value is observed in multiple measurements to ensure that the sensor does not have abnormal conditions under different environmental conditions. Adjust the sensor design or material selection based on the leakage current data to reduce leakage and improve insulation. Using the analysis module in combination with the first and second ports, the leakage current of the sensor after power is disconnected can be accurately and efficiently detected and recorded. This type of test not only reveals the insulation performance of the sensor, but also helps identify potential leakage problems, thereby improving the safety and reliability of the entire system. Through the analysis of leakage current data, appropriate adjustments and optimization of the sensor design can be made, and its material selection and structure can be further improved to reduce leakage and improve overall performance.

[0070] In one example, the N test circuits include a sensor type detection circuit, and the sensor type detection circuit is electrically connected to an eighth test port of the control circuit;

[0071] When the type of the sensor to be tested is detected, the input end of the analysis module obtains the level value measured by the sensor type detection circuit on the sensor to be tested through the first port and the second port, and the level value is used to determine the type of the sensor to be tested.

[0072] The sensor to be tested is connected to the type detection circuit, and the appropriate operating voltage and other operating conditions are provided to ensure that the sensor works normally and outputs a level signal. The analysis module reads the output level value of the sensor through the first port and the second port. The measured level value is used for further identification and analysis. The analysis module records the level values ​​measured under different conditions to ensure that the data information is complete and accurate: [V_{\text{level}}:\text{measured level value}]. Then, the obtained level value is compared with the preset standard level value range of various sensor types. Determine which type the sensor to be tested belongs to. For example: if the level is between [V1_min, V1_max], it is determined to be a type 1 sensor; if the level is between [V2_min, V2_max], it is determined to be a type 2 sensor, and so on. Repeat the test multiple times to verify consistency. After confirming that the multiple measurement results are consistent, the sensor type is finally determined. Using the analysis module in combination with the first port and the second port, the output level value of the sensor can be accurately and efficiently detected and recorded to determine its type. In automation and intelligent systems, this type detection is particularly important to ensure the correct sensor configuration. Through accurate measurement and analysis of level value data, fast and reliable type identification can be achieved, improving the adaptability and operational stability of the system.

[0073] For example, take the PNP / NPN type detection of the sensor to be tested as an example, Fig. 9 and Fig.10 As shown. When the U16 optocoupler is turned on, PC08 is at a low level, and U15 is not turned on because +VCC and white1 are both high voltages and no potential difference is formed, so U15 is not turned on, and PC12 is at a high level. At this time, white1 is NPN. When the U15 optocoupler is turned on, PC12 is at a low level, and U14 is not turned on because GND and white1 are both low voltages and no potential difference is formed, so U16 is not turned on, and PC08 is at a high level. At this time, white1 is PNP. When the U13 optocoupler is turned on, PC07 is at a low level, and U14 is not turned on because +VCC and black1 are both high voltages and no potential difference is formed, so PD04 is at a high level. At this time, black1 is NPN. When the U14 optocoupler is turned on, PD04 is at a low level, and U13 is not turned on because GND and white1 are both low voltages and no potential difference is formed, so PC07 is at a high level. At this time, black1 is PNP. This makes it possible to detect whether the sensor to be tested is of type N or P.

[0074] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A sensor detection device, characterized in that: include: A detector body and a circuit board arranged in the detector body, a preset circuit is recorded on the circuit board, a first port, a second port, an analysis module and a display module are arranged on the detector body, the first port and the second port are respectively arranged on both sides of the sensor to be tested, so as to connect the sensor to be tested to the preset circuit, the input end of the analysis module is connected to the first port and the second port, the output end of the analysis module is connected to the display module, the preset circuit includes a power supply circuit and N test circuits, N is an integer greater than 1, and the power supply circuit is electrically connected to the N test circuits; When the sensor to be tested is detected, the input end of the analysis module obtains the electrical data measured by the N test circuits on the sensor to be tested respectively through the first port and the second port, and the analysis module is used to determine the test result of the sensor to be tested according to the electrical data. The display module receives and displays the N test results corresponding to the sensor to be tested in the N test circuits respectively through the output end of the analysis module.

2. The sensor detection device according to claim 1, characterized in that: The analysis module is provided with a control circuit, and the control circuit is provided with M test ports. Each test circuit is electrically connected to a test port, and M is an integer greater than or equal to N.

3. The sensor detection device according to claim 2, characterized in that: The N test circuits include a reverse connection protection test circuit, and the reverse connection protection test circuit is electrically connected to the first test port of the control circuit; When performing a reverse connection protection test on the sensor to be tested, the input end of the analysis module obtains the first current value and the second current value measured by the reverse connection protection test circuit on the sensor to be tested through the first port and the second port, and the current direction corresponding to the first current value is opposite to the current direction corresponding to the second current value.

4. The sensor detection device according to claim 2, characterized in that: The N test circuits include a limit operating voltage test circuit, and the limit operating voltage test circuit is electrically connected to the second test port of the control circuit; When the sensor to be tested is subjected to a limit working voltage test, the voltage output to the limit working voltage test circuit is adjusted to a first voltage value or a second voltage value through the power supply circuit, and the input end of the analysis module obtains a third current value measured by the limit working voltage test circuit for the sensor to be tested through the first port and the second port, the first voltage value is the upper limit working voltage value of the sensor to be tested, and the second voltage value is the lower limit working voltage value of the sensor to be tested.

5. The sensor detection device according to claim 2, characterized in that: The N test circuits include an energy consumption test circuit, and the energy consumption test circuit is electrically connected to the third test port of the control circuit; When performing an energy consumption test on the sensor to be tested, the input end of the analysis module obtains a fourth current value measured by the energy consumption test circuit on the sensor to be tested through the first port and the second port, and the fourth current value is a current value when the sensor to be tested is not loaded.

6. The sensor detection device according to claim 2, characterized in that: The N test circuits include a load test circuit, and the load test circuit is electrically connected to the fourth test port of the control circuit; When the sensor to be tested is subjected to a load test, the input end of the analysis module obtains a fifth current value measured by the load test circuit on the sensor to be tested through the first port and the second port, and the fifth current value is the current value of the sensor to be tested under a load of the nominal load value.

7. The sensor detection device according to claim 2, characterized in that: The N test circuits include an overload test circuit, and the overload test circuit is electrically connected to the fifth test port of the control circuit; When the sensor to be tested is subjected to an overload test, the input end of the analysis module obtains a sixth current value measured by the overload test circuit on the sensor to be tested through the first port and the second port, and the sixth current value is the maximum operating current value of the sensor to be tested when the load value is gradually reduced.

8. The sensor detection device according to claim 2, characterized in that: The N test circuits include a residual voltage test circuit, and the residual voltage test circuit is electrically connected to the sixth test port of the control circuit; When performing a residual voltage test on the sensor to be tested, the input end of the analysis module obtains the residual voltage measured by the residual voltage test circuit on the sensor to be tested through the first port and the second port, and the residual voltage is the voltage value of the sensor to be tested when the control circuit controls the residual voltage test circuit to be disconnected from the power supply circuit.

9. The sensor detection device according to claim 2, characterized in that: The N test circuits include a leakage test circuit, and the leakage test circuit is electrically connected to the seventh test port of the control circuit; When a leakage test is performed on the sensor to be tested, the input end of the analysis module obtains the seventh current value measured by the leakage test circuit on the sensor to be tested through the first port and the second port, and the seventh current value is the current value of the sensor to be tested when it is disconnected.

10. The sensor detection device according to claim 2, characterized in that: The N test circuits include a sensor type detection circuit, and the sensor type detection circuit is electrically connected to the eighth test port of the control circuit; When the type of the sensor to be tested is detected, the input end of the analysis module obtains the level value measured by the sensor type detection circuit on the sensor to be tested through the first port and the second port, and the level value is used to determine the type of the sensor to be tested.

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