Interface characteristic test system of comprehensive equipment box for multifunctional rod
By designing the interface characteristic testing system of the multi-function rod integrated equipment box, using components such as auxiliary testing units, testing units and data units, many items such as interface output level, load capacity, signal level establishment capability and reception sensitivity are realized. Testing solves the problem of lack of standard systems in the existing technology, and realizes efficient and safe interface performance detection and evaluation to ensure product quality and safety.
Patent Information
- Application Number
- CN202411466139.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-01-17
AI Technical Summary
The prior art lacks a standard system to guide the interface characteristic testing of multifunctional rod integrated equipment boxes, resulting in the inability to effectively complete the detection and evaluation of interface performance in the field of inspection and testing.
A multifunctional rod integrated equipment box interface characteristic testing system is designed, including auxiliary testing units, test units, data units and interface equipment. Through components such as multimeter, oscilloscope and interface conversion units, the interface output level and loading are realized. It has multiple tests such as capability, signal level establishment capability and reception sensitivity, and uses RS-485 bus connection to integrate multiple interface characteristic tests.
It realizes efficient and safe completion of interface characteristic testing in the laboratory, ensures product quality and safety, promotes product upgrades and iterations, fills in the lack of methods in the field of inspection and testing, and provides a universal testing system that can complete multiple interfaces at one time. Performance test.
Smart Images
Figure CN119322224A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of inspection and detection, and in particular relates to an interface characteristic testing system of an integrated equipment box for a multifunctional pole. Background Art
[0002] Multifunctional poles and supporting integrated equipment boxes are widely used in smart city pilot construction projects in various cities. The integrated equipment box for multifunctional poles provides installation space for supporting equipment of various mounting facilities on the pole body, and provides power supply, network supply, grounding, wiring and other services. It is a combination of low-voltage complete switchgear and intelligent unit. The intelligent unit is the main body of the integrated equipment box, which is composed of supporting and monitoring units of various mounting equipment. Due to the integration of multifunctional poles, a large number of interfaces appear in the equipment box, and the interface characteristics have become one of the important performances of the integrated equipment box for multifunctional poles. However, in the field of inspection and testing, there is currently no standard system that can directly guide the inspection and testing laboratory to complete the interface characteristics test of the integrated equipment box for multifunctional poles. Summary of the invention
[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an interface characteristic testing system for an integrated equipment box for a multi-functional pole, so as to fill the gaps in detection, realize interface characteristic testing in an inspection and testing laboratory, ensure product quality and safety, promote product upgrades and iterations, and promote industry progress.
[0004] The present invention solves the technical problem by the following technical solutions:
[0005] An interface characteristic test system for an integrated equipment box for a multifunctional pole, comprising an auxiliary test unit, a test unit, a data unit and an interface device EUT, wherein the interface, the auxiliary test unit, the test unit and the data unit are all connected to the interface device EUT, and the auxiliary test unit and the test unit are all connected to the data unit;
[0006] The auxiliary test unit includes a power supply, a host computer and an RLC load, wherein the power supply is used to provide working power for the interface device EUT, the host computer provides signal or message information for the interface device EUT, and the RLC load provides the necessary load elements for building a test circuit;
[0007] The test unit includes a multimeter and an oscilloscope, the multimeter tests voltage, current and load, and the oscilloscope measures interface signal waveform, transition waveform and waveform;
[0008] The data unit completes data collection and analysis, collects test unit data and interface device EUT parameters, and analyzes and calculates the data to give a determination result.
[0009] Moreover, it also comprises an interface conversion unit, and the interface conversion unit is connected with the auxiliary test unit and the test unit respectively.
[0010] Furthermore, the auxiliary test unit, the test unit, the interface conversion unit and the data unit are all connected by an RS-485 bus.
[0011] Furthermore, the connection terminals A and B between the interface device EUT and the auxiliary test unit are in a no-load state for interface output level testing.
[0012] Furthermore, a load resistor R5 is loaded between the connection terminals A and B of the interface device EUT and the auxiliary test unit for interface load capacity testing and interface receiving sensitivity testing.
[0013] Moreover, an RC circuit is loaded between the connection terminals A and B of the interface device EUT and the auxiliary test unit. The RC circuit includes a capacitor C and resistors R1, R2, R3 and R4 respectively connected in parallel to both ends of the capacitor C, and is used for interface signal level establishment capability testing.
[0014] The positive effects that the present invention can produce are:
[0015] 1. The present invention aims to provide an interface characteristic test system for a comprehensive equipment box for a multifunctional pole, so as to complete the interface characteristic test in a laboratory.
[0016] 2. The present invention has a certain universality. The system provides an interface conversion unit, which can meet the needs of the supporting equipment interfaces of various types of mounting equipment in the integrated equipment box for the multi-functional pole, and use the system to complete the interface performance test; it helps technicians to complete the test tasks more safely and efficiently. The system integrates the test circuits of multiple test items, and only needs to incorporate the tested products into the corresponding positions to complete the corresponding tests; it is more intelligent, and the system sets the connection between the data unit and the test unit, completes data collection in real time, and analyzes the interface performance.
[0017] 3. The invention fills the method gap in the field of inspection and testing, realizes interface characteristic testing in the laboratory, ensures product quality and safety, promotes product upgrades and iterations, and promotes industry progress.
[0018] 4. The present invention integrates multiple interface characteristic tests, including interface output level test, interface load capacity test, interface signal level establishment ability test, interface receiving sensitivity test, etc., and completes multiple interface performance tests in one wiring, which is efficient and safe. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the test system of the present invention;
[0020] Figure 2This is a schematic diagram of the interface output level test of the present invention;
[0021] Figure 3 This is a schematic diagram of the interface load capacity test and interface receiving sensitivity test of the present invention;
[0022] Figure 4 A schematic diagram of the interface signal level establishment capability test of the present invention;
[0023] Figure 5 The flowchart of the interface characteristic test of the present invention. DETAILED DESCRIPTION
[0024] The present invention is further described in detail below through specific examples. The following examples are only illustrative and not restrictive, and the protection scope of the present invention cannot be limited thereto.
[0025] like Figure 1 As shown, an interface characteristic test system of an integrated equipment box for a multifunctional pole, the innovation of which is that it comprises an auxiliary test unit, a test unit, a data unit and an interface device EUT, wherein the interface, the auxiliary test unit, the test unit and the data unit are all connected to the interface device EUT, and the auxiliary test unit and the test unit are all connected to the data unit;
[0026] The auxiliary test unit includes a power supply, a host computer and an RLC load, wherein the power supply is used to provide working power for the interface device EUT, the host computer provides signal or message information for the interface device EUT, and the RLC load provides the necessary load elements for building a test circuit;
[0027] The test unit includes a multimeter and an oscilloscope, the multimeter tests voltage, current and load, and the oscilloscope measures interface signal waveform, transition waveform and waveform;
[0028] The data unit completes data collection and analysis, collects test unit data and interface device EUT parameters, and analyzes and calculates the data to give a determination result.
[0029] The present invention integrates multiple interface characteristic tests, including interface output level test, interface load capacity test, interface signal level establishment ability test, interface receiving sensitivity test, etc., and completes multiple interface performance tests in one wiring, which is efficient and safe.
[0030] It also includes an interface conversion unit, which is connected to the auxiliary test unit and the test unit respectively, and provides conversion modules for various interfaces of the multifunctional pole integrated equipment box, converting them into RS-485 interfaces, and then testing and connecting them. The monitoring terminal or mounting equipment in the multifunctional pole integrated equipment box mostly adopts RS-485. If there is a problem with individual RS-232 ports, the interface conversion unit can be used to convert them before testing.
[0031] The auxiliary test unit, test unit, interface conversion unit and data unit are all connected by RS-485 bus.
[0032] Interface output level test: Figure 2 As shown, the connection terminals A and B of the interface device EUT and the auxiliary test unit are in a no-load state. The interface device EUT is connected to the system position I. At this time, the RS-485 interface A and B terminals of the device are no-loaded, the power supply is powered by the device, and the device is in normal working condition. The multimeter measures the output differential mode voltage value between the A and B terminals. The multimeter feeds back the data to the data unit for storage through the network cable. The data unit receives the result data and performs data analysis. When the result satisfies the condition of being greater than or equal to 1.5V and less than or equal to 5.5V, the data unit gives a judgment result that the interface output level test has passed; otherwise, a judgment result of failing is given.
[0033] Interface load capacity test: Figure 3 As shown, a load resistor R5 is loaded between the connection terminals A and B of the interface device EUT and the auxiliary test unit, the interface device EUT is connected to the system position II, the resistance value of the load R5 in the auxiliary test unit is adjusted, and the test condition of the load condition being 375Ω is given. The power supply supplies power to the device, and the device is in normal working condition. The multimeter measures the output differential mode voltage between the A and B terminals, and the multimeter feeds back the data to the data unit for storage through the network cable. The data unit receives the result data and performs data analysis. When the result satisfies greater than or equal to 1.5V, the data unit gives a judgment result that the interface load capacity test has passed; otherwise, a judgment result of failure is given.
[0034] Interface receiving sensitivity test: Figure 3As shown, a load resistor R5 is loaded between the connection terminals A and B of the interface device EUT and the auxiliary test unit, the interface device EUT is connected to the system position II, the resistance value of the load R5 in the auxiliary test unit is adjusted so that the differential mode voltage between the A and B terminals is +200mV, the power supply is powered by the device, the device is in normal working condition, the host computer terminal is used to continuously send command signals to the interface device (EUT) 100 times, the number of times the interface device (EUT) correctly receives the command is recorded on the host computer and fed back to the data unit for storage, and the data unit divides the number of correct receptions by 100 to calculate the success rate of receiving the command. The resistance value of the load R5 in the auxiliary test unit is adjusted again so that the differential mode voltage between the A and B terminals is -200mV, the power supply is powered by the device, the device is in normal working condition, the host computer terminal is used to continuously send command signals to the interface device (EUT) 100 times, the number of times the interface device (EUT) correctly receives the command is recorded on the host computer and fed back to the data unit for storage, and the data unit divides the number of correct receptions by 100 to calculate the success rate of receiving the command. When the success rate data of the two times are both greater than or equal to 98%, the data unit gives a judgment result that the interface receiving sensitivity test has passed; otherwise, a judgment result that the test has failed is given.
[0035] Interface signal level establishment capability test: Figure 4 As shown, an RC circuit is loaded between the connection terminals A and B of the interface device EUT and the auxiliary test unit. The RC circuit includes a capacitor C and resistors R1, R2, R3 and R4 respectively connected in parallel with both ends of the capacitor C. The interface device EUT is connected to the system position III. The test resistors R1-R4 of the auxiliary test unit are 50Ω, the capacitor C is 0.066μf, and the power supply is used to power the device. After setting the interface communication rate, the device is in normal working state. The signal jump waveform and jump time of the RS-485 interface of the device are collected by an oscilloscope. The oscilloscope feeds back the jump time data to the data unit through the network cable for storage. The data unit receives the result data and performs data analysis. When the jump time is less than 30% of the communication rate, the data unit gives a judgment result that the interface signal level establishment capability test has passed; otherwise, a judgment result of failure is given.
[0036] The present invention is as follows Figure 5 The process shown completes the interface output level test, interface load capacity test, interface signal level establishment ability test, interface receiving sensitivity test, etc., and completes multiple interface performance tests in one wiring, which is efficient and safe.
[0037] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.
Claims
1. An interface characteristic test system for a multifunctional pole integrated equipment box, characterized in that: It includes an auxiliary test unit, a test unit, a data unit and an interface device EUT, wherein the interface, the auxiliary test unit, the test unit and the data unit are all connected to the interface device EUT, and the auxiliary test unit and the test unit are all connected to the data unit; The auxiliary test unit includes a power supply, a host computer and an RLC load, wherein the power supply is used to provide working power for the interface device EUT, the host computer provides signal or message information for the interface device EUT, and the RLC load provides the necessary load elements for building a test circuit; The test unit includes a multimeter and an oscilloscope, the multimeter tests voltage, current and load, and the oscilloscope measures interface signal waveform, transition waveform and waveform; The data unit completes data collection and analysis, collects test unit data and interface device EUT parameters, and analyzes and calculates the data to give a determination result.
2. The interface characteristic test system of the integrated equipment box for the multifunctional pole according to claim 1 is characterized in that: It also includes an interface conversion unit, which is connected to the auxiliary test unit and the test unit respectively.
3. The interface characteristic test system of the integrated equipment box for the multifunctional pole according to claim 2 is characterized in that: The auxiliary test unit, the test unit, the interface conversion unit and the data unit are all connected by RS-485 bus.
4. The interface characteristic test system of the integrated equipment box for a multifunctional pole according to claim 1 is characterized in that: The connection terminals A and B between the interface device EUT and the auxiliary test unit are in a no-load state and are used for interface output level testing.
5. The interface characteristic test system of the integrated equipment box for a multifunctional pole according to claim 1 is characterized in that: A load resistor R5 is loaded between the connection terminals A and B of the interface device EUT and the auxiliary test unit for interface load capacity test and interface receiving sensitivity test.
6. The interface characteristic test system of the integrated equipment box for a multifunctional pole according to claim 1 is characterized in that: An RC circuit is loaded between the connection terminals A and B of the interface device EUT and the auxiliary test unit. The RC circuit includes a capacitor C and resistors R1, R2, R3 and R4 respectively connected in parallel to both ends of the capacitor C, and is used for interface signal level establishment capability testing.