Monitoring device and monitoring load box

Abstract

The utility model discloses a monitoring device and a monitoring load box, and the monitoring device comprises a test circuit which is connected with a tested device and is used for detecting the tested device; and the monitoring circuit is electrically connected with the test circuit and is used for monitoring the test circuit. Through the above structure, real-time monitoring of the test circuit is realized.

Description

Technical Field

[0001] This application relates to the field of automotive monitoring technology, and in particular to a monitoring device and a monitoring load box. Background Technology

[0002] In the reliability testing of automotive power amplifier products, operational stability and reliability testing require monitoring information such as operating current and standby current.

[0003] The existing technical solution involves setting up the test environment, turning on the DC power supply, data logger, and other equipment, and periodically checking whether the electrical parameters and load output of the sample are normal. For current monitoring, a high-precision benchtop multimeter or data logger is required.

[0004] Therefore, there is an urgent need for equipment that can display the operating current status in real time and provide an interface to enable a single data logger to collect and monitor the operating current, quiescent current, and power amplifier output of the sample in real time. Utility Model Content

[0005] The purpose of this invention is to provide a monitoring device and a monitoring load box for real-time monitoring of test circuits.

[0006] To address the aforementioned technical problems, this application provides a monitoring device, comprising: a test circuit connected to the device under test for detecting the device under test; and a monitoring circuit electrically connected to the test circuit for monitoring the test circuit.

[0007] Preferably, the monitoring circuit includes: a sampling resistor disposed between the test circuit and the device under test; and a current monitoring module connected to both ends of the sampling resistor for collecting the current on the sampling resistor.

[0008] Preferably, the current monitoring module includes a voltage monitoring chip connected to both ends of the sampling resistor for monitoring the voltage across the sampling resistor.

[0009] Preferably, the current monitoring module further includes: a first indicator light connected to the voltage monitoring chip, used to display when the voltage monitoring chip detects that the voltage on the sampling resistor is within a set range; and a second indicator light connected to the voltage monitoring chip, used to display when the voltage monitoring chip detects that the voltage on the sampling resistor is not within the set range; wherein the first indicator light and the second indicator light are indicator lights of different colors.

[0010] Preferably, the current monitoring module further includes a voltage display meter, the two ends of which are connected to the positive and negative terminals of the voltage monitoring chip, for displaying the voltage monitored by the voltage monitoring chip.

[0011] Preferably, the current monitoring module further includes a data logger, the two ends of which are connected to the two ends of the sampling resistor, for recording the current on the sampling resistor.

[0012] Preferably, the test circuit includes: a DC regulated power supply, including a positive terminal and a negative terminal, wherein the positive terminal of the DC regulated power supply is connected to the positive terminal of the device under test, and the negative terminal of the DC regulated power supply is connected to the negative terminal of the device under test; wherein the monitoring circuit is disposed between the positive terminal of the DC regulated power supply and the positive terminal of the device under test.

[0013] Preferably, one end of the sampling resistor is connected to the positive terminal of the DC regulated power supply, and the other end of the sampling resistor is connected to the positive terminal of the device under test.

[0014] Preferably, the sampling resistor is a fixed resistor.

[0015] To address the aforementioned technical problems, this application also provides a monitoring load box, which includes the monitoring device described in any of the above embodiments.

[0016] The beneficial effects of this application are: by setting a monitoring circuit between the test circuit and the device under test, and making the monitoring circuit electrically connected to the test circuit and the device under test, the test environment can be monitored through the monitoring circuit while the test circuit is testing the device under test, so as to realize real-time acquisition and monitoring of the working current, static current and output of the device under test sample. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of an embodiment of the monitoring device provided in this application;

[0019] Figure 2 A schematic diagram of a specific embodiment of the monitoring device provided in this application;

[0020] Figure 3 This is a schematic diagram of the structure of a first specific embodiment of the monitoring device provided in this application;

[0021] Figure 4 This is a schematic diagram of the structure of a second specific embodiment of the monitoring device provided in this application;

[0022] Figure 5 This is a structural schematic diagram of a third specific embodiment of the monitoring device provided in this application. Detailed Implementation

[0023] 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 of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0024] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the application. The singular forms “a,” “said,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms, unless otherwise clearly indicated above. “Multiple” generally includes at least two, but does not exclude the inclusion of at least one.

[0025] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0026] It should be understood that the terms "comprising," "including," or any other variations used herein 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 limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0027] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0028] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in every place in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0029] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0030] This application provides a monitoring device; please refer to [link / reference]. Figure 1 , Figure 1 This is a schematic diagram of the structure of an embodiment of the monitoring device provided in this application. Figure 1 As shown, the monitoring device includes: a test circuit 11, connected to the device under test 10, used to test the device under test 10; and a monitoring circuit 12, electrically connected to the test circuit 11, used to monitor the test circuit 11.

[0031] The device under test (DUT) 10 is an in-vehicle power amplifier product. The monitoring circuit 12 is used to monitor the reliability testing of the in-vehicle power amplifier product. The test circuit 11 is used to perform reliability testing / inspection on the DUT 10.

[0032] In this embodiment, by setting a monitoring circuit 12 between the test circuit 11 and the device under test 10, the operating current status in the test circuit 11 can be monitored in real time while the test circuit 11 is testing the device under test, thereby enabling long-term monitoring of the working environment and test environment of the device under test 10.

[0033] Please refer to further information. Figure 2 , Figure 2 This is a schematic diagram of a specific embodiment of the monitoring device provided in this application. Figure 2 As shown, the monitoring circuit 12 specifically includes a sampling resistor R1 and a current monitoring module 120. The sampling resistor R1 is positioned between the test circuit 11 and the device under test 10, used to sense the current in the test circuit 11 and to divide the voltage across the device under test 10. The current monitoring module 120 is connected to both ends of the sampling resistor R1, used to collect the voltage across the sampling resistor R1, and thus collect the current flowing through the sampling resistor R1.

[0034] In this embodiment, a sampling resistor R1 is connected to an external current monitoring module 120, thereby enabling real-time monitoring of the operating current in the test circuit 11. In this embodiment, by providing an interface across the sampling resistor R1, the current monitoring module 120 can be connected to this interface to collect and monitor the operating current, quiescent current, and output current of the device under test in real time.

[0035] In a first specific embodiment, the current monitoring module 120 includes a voltage monitoring chip 121, which is connected to the interfaces at both ends of the sampling resistor R1 and is used to detect the voltage across the sampling resistor R1. Please refer to further details. Figure 3 , Figure 3 This is a schematic diagram of the structure of a first specific embodiment of the monitoring device provided in this application.

[0036] Furthermore, the current monitoring module 120 also includes a first indicator light 1211 and a second indicator light 1212. The first indicator light 1211 is connected to the voltage monitoring chip 121 and is used to display the voltage when the voltage monitoring chip 121 detects that the voltage across the sampling resistor R1 is within a set range. The second indicator light 1212 is connected to the voltage monitoring chip 121 and is used to display the voltage when the voltage monitoring chip 121 detects that the voltage across the sampling resistor R1 is not within the set range. The first indicator light 1211 and the second indicator light 1212 are indicator lights of different colors. Specifically, the first indicator light 1211 is a green indicator light, and the second indicator light 1212 is a red indicator light. The voltage monitoring chip 121 detects whether the voltage across the sampling resistor R1 is within the set range. If it is within the set range, it controls the first indicator light 1211 to display; if it is not within the set range, it controls the second indicator light 1212 to display. Preferably, the first indicator light 1211 and the second indicator light 1212 do not display simultaneously. The voltage monitoring chip 121 checks the test environment of the device under test 10 in a timely manner, and displays the results in a timely manner through the first indicator light 1211 and the second indicator light 1212. This allows for easy and intuitive observation of any abnormalities during inspections. This method is low-cost and can quickly determine the working status of the device under test 10 without using a data logger.

[0037] In a second embodiment, the current monitoring module 120 further includes a voltage display meter 122. Please refer to [link / reference needed] for details. Figure 4 , Figure 4 This is a schematic diagram of the structure of a second specific embodiment of the monitoring device provided in this application. Figure 4 As shown, the two ends of the voltage display meter 122 are connected to the positive and negative terminals of the voltage monitoring chip 121. Specifically, the two ends of the voltage display meter 122 are connected to the two ends of the sampling resistor R1 through the voltage monitoring chip 121, and are used to display the voltage magnitude monitored by the voltage monitoring chip 121, that is, to detect and display the voltage drop across the sampling resistor R1.

[0038] In this embodiment, the voltage display meter 122 displays the real-time voltage value, which is convenient for recording the real-time current during inspection. It can also determine the working status of the device under test 10 without using a data logger. This method has a low cost.

[0039] In existing technologies, solutions using benchtop multimeters typically only monitor the operating current of one device under test, requiring multiple multimeters for a single test, resulting in high costs. Solutions using data loggers are limited by the number of channels they can collect, and the current collected per channel should not exceed 3A. However, the standard load operating current of automotive power amplifiers is generally higher than 3A, failing to meet testing requirements. Using current sensors for data collection also presents the problem of high costs.

[0040] Compared to existing technologies, this application uses a voltage monitoring chip in conjunction with two indicator lights, or a voltage monitoring chip and a voltage display meter, to monitor multiple test channels, thereby saving costs. Specifically, this application uses a voltage monitoring chip to monitor both ends of the sampling resistors in multiple test paths, and then displays the results using multiple indicator lights or multiple voltage display meters, facilitating timely inspection by monitoring personnel. The number of indicator lights is twice the number of test channels, and the number of voltage display meters is the same as the number of test channels.

[0041] In the third embodiment, the current monitoring module 120 further includes a data logger 123, for details please refer to [link / reference needed]. Figure 5 , Figure 5 This is a structural schematic diagram of a third specific embodiment of the monitoring device provided in this application. Figure 5 As shown, the two ends of the data logger 123 are connected to the two ends of the sampling resistor R1 to record the current on the sampling resistor R1.

[0042] In this embodiment, the voltage across the sampling resistor is directly monitored using a data logger, and the operating current is recorded in real time. This allows for continuous monitoring and recording, and facilitates retrospective analysis. When monitoring multiple test channels, multiple data loggers are connected to the interfaces at both ends of the sampling resistor in multiple paths, thereby enabling monitoring of multiple test channels. Although this method is more expensive, its advantage lies in the ability to continuously monitor and record each monitoring channel, facilitating retrospective analysis.

[0043] As described above, the voltage monitoring chip in the first embodiment, the data logger in the second embodiment, and the data logger in the third embodiment can be used in combination, and no limitation is made here.

[0044] Specifically, the test circuit 11 includes a DC regulated power supply with a positive and a negative terminal. The positive terminal of the DC regulated power supply is connected to the positive terminal of the device under test (DUT) 10, and the negative terminal of the DC regulated power supply is connected to the negative terminal of the DUT 10. A monitoring circuit 12 is positioned between the positive terminal of the DC regulated power supply and the positive terminal of the DUT 10. In other embodiments, the monitoring circuit 12 is positioned between the negative terminal of the DC regulated power supply and the negative terminal of the DUT 10. Specifically, one end of the sampling resistor R1 is connected to the positive terminal of the DC regulated power supply, and the other end of the sampling resistor R1 is connected to the positive terminal of the DUT 10.

[0045] In this embodiment, the sampling resistor R1 is a fixed resistor. Specifically, the sampling resistor R1 is a high-power resistor, such as a 10mΩ, 25W high-power resistor, for current sampling, thus enabling current acquisition of greater than 50A. Compared to the existing technology that directly connects the data logger between the test circuit and the device under test to measure the current in the test circuit, this solution is limited by the specifications and cost of the data logger. This embodiment acquires the current in the test circuit through a high-power sampling resistor, and then uses an external data logger to detect the operating current in the test circuit, enabling the acquisition and measurement of large currents without being limited by the specifications of the data logger.

[0046] The beneficial effect of this embodiment is that by setting a monitoring circuit between the test circuit and the device under test, and making the monitoring circuit electrically connected to the test circuit and the device under test, the test environment can be monitored through the monitoring circuit while the test circuit is testing the device under test, so as to realize the real-time acquisition and monitoring of the working current, static current and output of the device under test sample.

[0047] This application also provides a monitoring load box, which is a monitoring load box for vehicle power amplifier products. The monitoring load box includes the monitoring device described in any of the above embodiments. In a first specific embodiment, a first indicator light and a second indicator light are disposed on the outer wall of the monitoring load box and are connected to the voltage monitoring chip signal, so as to facilitate staff to inspect and check the working status of the test circuit. A voltage display meter and a data logger are also disposed on the surface of the monitoring load box.

[0048] The beneficial effects of this application are: by setting a monitoring circuit between the test circuit and the device under test, and making the monitoring circuit electrically connected to the test circuit and the device under test, the test environment can be monitored through the monitoring circuit while the test circuit is testing the device under test. This not only saves the number of monitoring devices used and achieves cost savings in the test monitoring scheme, but also allows observation of the operating current status of the device under test.

[0049] The above description is merely an embodiment of this application and does not limit the scope of patent protection of this application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A monitoring device, characterized in that The monitoring device comprises: a test circuit connected to a device under test, for testing the device under test; a monitoring circuit electrically connected to the test circuit, for monitoring the test circuit.

2. The monitoring device of claim 1, wherein, The monitoring circuit comprises: a sampling resistor arranged between the test circuit and the device under test; a current monitoring module connected to both ends of the sampling resistor, for collecting current on the sampling resistor.

3. The monitoring device of claim 2, wherein, The current monitoring module comprises: a voltage monitoring chip connected to both ends of the sampling resistor, for monitoring voltage on the sampling resistor.

4. The monitoring device of claim 3, wherein, The current monitoring module further comprises: a first display lamp connected to the voltage monitoring chip, for displaying when the voltage monitoring chip monitors that voltage on the sampling resistor is within a set range; a second display lamp connected to the voltage monitoring chip, for displaying when the voltage monitoring chip monitors that voltage on the sampling resistor is not within the set range; wherein the first display lamp and the second display lamp are display lamps of different colors.

5. The monitoring device of claim 3, wherein, The current monitoring module further comprises: a voltage display table, both ends of the voltage display table being connected to positive and negative poles of the voltage monitoring chip, for displaying voltage monitored by the voltage monitoring chip.

6. The monitoring device of claim 2, wherein, The current monitoring module further comprises: a data recorder, both ends of the data recorder being connected to both ends of the sampling resistor, for recording current on the sampling resistor.

7. The monitoring device of claim 2, wherein, The test circuit comprises: a direct-current stabilized power supply including a positive pole and a negative pole, the positive pole of the direct-current stabilized power supply being connected to a positive pole of the device under test, and the negative pole of the direct-current stabilized power supply being connected to a negative pole of the device under test; wherein the monitoring circuit is arranged between the positive pole of the direct-current stabilized power supply and the positive pole of the device under test.

8. The monitoring device of claim 7, wherein, One end of the sampling resistor is connected to the positive pole of the direct-current stabilized power supply, and the other end of the sampling resistor is connected to the positive pole of the device under test.

9. The monitoring device of claim 2, wherein, The sampling resistor is a fixed resistor.

10. A load monitoring bin, characterized by, The monitoring load box comprises the monitoring device according to any one of claims 1 to 9.

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