Test equipment

Abstract

The application relates to the technical field of printed circuit boards, and discloses a test device, which comprises a voltage regulator, a current-rising transformer, a test loop and a current monitoring device. The primary side of the current-rising transformer is connected with the output end of the voltage regulator. One end of the test loop is connected with the secondary side of the current-rising transformer, and the other end of the test loop is used for being connected with a conductor to be tested. The current monitoring device is used for measuring the current output by the current-rising transformer. In the above manner, the test device provided by the application meets the experimental requirements, and has a simple structure and low manufacturing and maintenance costs.

Description

Technical Field

[0001] This application relates to the field of printed circuit board technology, and in particular to a testing device. Background Technology

[0002] With the rapid development of power electronics technology, printed circuit boards (PCBs) are increasingly widely used in electronic products, and their quality directly affects the reliability and performance of electronic devices. Copper foil, as a key conductive component of PCBs, plays a crucial role in heat dissipation and electrical performance. Copper foil temperature rise testing is an important method for evaluating copper foil performance. This typically involves injecting a constant current into the copper foil on the PCB and, after its temperature stabilizes, determining whether the copper foil design meets standards.

[0003] There is a lack of dedicated testing equipment for copper foil on printed circuit boards in the current technology. When testing copper foil, high-power power supply equipment is used to provide a large current for the copper foil temperature rise test. However, high-power power supply equipment has the problem of high procurement and maintenance costs, and the unstable high current output of high-power power supply equipment leads to low test accuracy. Therefore, how to provide a copper foil testing equipment for printed circuit boards that is simple in structure, low in production and maintenance costs, and accurate in testing is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of the problems existing in the background art, the purpose of this application is to provide a testing device that overcomes or at least partially solves the above problems.

[0005] According to a first aspect of this application, a testing apparatus is provided, comprising a voltage regulator, a current-boosting transformer, a test circuit, and a current monitoring device. The primary winding of the current-boosting transformer is connected to the output terminal of the voltage regulator. One end of the test circuit is connected to the secondary winding of the current-boosting transformer, and the other end of the test circuit is used to connect to a conductor under test. The current monitoring device is used to measure the output current of the current-boosting transformer.

[0006] In one or more of the above optional embodiments, the test circuit includes a first test lead and a second test lead. The first end of the first test lead is connected to the secondary side of the current-boosting transformer, and the second end of the first test lead is used to electrically connect to one end of the conductor under test. The first end of the second test lead is connected to the secondary side of the current-boosting transformer, and the second end of the second test lead is used to electrically connect to the other end of the conductor under test.

[0007] In one or more of the above optional embodiments, the second end of the first test lead is provided with a first terminal, which is used to connect to one end of the conductor under test; and / or the second end of the second test lead is provided with a second terminal, which is used to connect to the other end of the conductor under test.

[0008] In one or more of the above optional embodiments, the number of first test wires is at least two, and the number of second test wires is at least two.

[0009] In one or more of the above optional embodiments, the voltage regulator includes a first winding and a sliding contact. The first winding includes a first end and a second end. The sliding contact is slidably disposed between the first end and the second end. The first end has a first terminal point, and the second end has a second terminal point and a third terminal point. The first terminal point is used to connect to the live wire of the mains power supply, the second terminal point is used to connect to the neutral wire of the mains power supply, and the third terminal point and the sliding contact are electrically connected to the primary side of the step-up transformer.

[0010] In one or more of the above optional embodiments, the primary side of the current booster transformer includes a primary winding, and the secondary side of the current booster transformer includes a secondary winding. One end of the primary winding is provided with a fourth terminal, the other end of the primary winding is provided with a fifth terminal, one end of the secondary winding is provided with a sixth terminal, the other end of the secondary winding is provided with a seventh terminal, the fourth terminal is connected to a sliding contact, the fifth terminal is connected to a third terminal, and the sixth and seventh terminals are connected to one end of a test circuit.

[0011] In one or more of the above optional embodiments, a temperature measuring device is included, which includes a main body, a connecting wire, and a temperature measuring probe. One end of the connecting wire is connected to the main body, and the other end of the connecting wire is connected to the temperature measuring probe. The temperature measuring probe is used to abut against the surface of the conductor to be measured; and / or, the temperature measuring device includes a thermal imager.

[0012] In one or more of the above optional embodiments, a host computer is included, which is equipped with a display screen, and a current monitoring device and / or a temperature measuring device are communicatively connected to the host computer.

[0013] In one or more of the above optional embodiments, the current monitoring device includes a current sensor disposed in the test circuit, and the current sensor is used to measure the current of the test circuit.

[0014] In one or more of the above alternative embodiments, the current monitoring device includes an oscilloscope connected to a current sensor.

[0015] In one or more of the above optional embodiments, the current monitoring device is a clamp meter, which is used to measure the current of the test circuit.

[0016] The beneficial effects of the embodiments of this application are: the test equipment provided by this application, through the cooperation of a voltage regulator, a current booster transformer and a current monitoring device, outputs a more accurate current that meets the experimental requirements. Compared with the traditional method of using high-power power supply equipment to output the current required for the temperature rise test of the copper foil of the circuit board, the test equipment provided by the embodiments of this application meets the experimental requirements while having a simple structure and lower manufacturing and maintenance costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 A schematic diagram illustrating a test device connected to a mains power supply and a conductor under test, provided as an embodiment of this application; Figure 2 A schematic diagram of a voltage regulator for a testing device provided in an embodiment of this application; Figure 3 This is a schematic diagram of a current-boosting transformer for a testing device provided in an embodiment of this application. Detailed Implementation

[0019] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0021] In the description of this specification, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0023] Please see Figure 1 The testing equipment 1000 includes a voltage regulator 1, a current-boosting transformer 2, a test circuit, and a current monitoring device 7. The input terminal of the voltage regulator 1 is connected to the mains power supply A. The primary winding of the current-boosting transformer 2 is connected to the output terminal of the voltage regulator 1. One end of the test circuit is connected to the secondary winding of the current-boosting transformer 2, and the other end of the test circuit is connected to the conductor under test B. The conductor under test B forms a circuit by connecting to the secondary winding of the current-boosting transformer 2 through the test circuit. The current monitoring device 7 is used to measure the current output by the current-boosting transformer 2.

[0024] When applied to the temperature rise test of copper foil on a circuit board, the conductor under test, B, is the copper foil of the circuit board. The two ends of the copper foil are connected to the secondary side of the step-up transformer 2 via a test circuit. After the voltage regulator 1 of the test equipment 1000 is connected to the mains power supply A, the step-up transformer 2 converts the high voltage and small current output by the voltage regulator 1 into a low voltage and a large current. The current monitoring device 7 monitors the current output of the step-up transformer 2. By adjusting the voltage output of the voltage regulator 1, the current output from the output terminal of the step-up transformer 2 is changed to obtain the current required for the experiment. Combined with the temperature measuring device 6 to measure the temperature of the copper foil on the circuit board, the copper foil temperature rise test can be completed.

[0025] The test equipment 1000 provided in this application, through the cooperation of voltage regulator 1, current booster transformer 2 and current monitoring device 7, outputs a relatively accurate current that meets the experimental requirements. Compared with the traditional method of using high-power power supply equipment to output the current required for circuit board copper foil temperature rise testing, the test equipment 1000 provided in this application meets the experimental requirements while having a simple structure and lower manufacturing and maintenance costs.

[0026] In some embodiments, the test device 1000 includes a power cord 3, one end of which is connected to the input terminal of the voltage regulator 1, and the other end is used to connect to the mains power supply A.

[0027] In some embodiments, the end of the power cord 3 away from the voltage regulator 1 is provided with a plug, which is used to plug into a mains socket.

[0028] In some embodiments, the test circuit includes a first test lead 4 and a second test lead 5. The first end of the first test lead 4 is connected to the first end of the secondary side of the current booster transformer 2, and the second end of the first test lead 4 is used to electrically connect to one end of the conductor B under test. The first end of the second test lead 5 is connected to the second end of the secondary side of the current booster transformer 2, and the second end of the second test lead 5 is used to electrically connect to the other end of the conductor B under test.

[0029] In some embodiments, the second end of the first test lead 4 is provided with a first terminal, which is used to connect to one end of the conductor B to be tested.

[0030] In some embodiments, the second end of the second test lead 5 is provided with a second terminal, which is used to connect to the other end of the conductor B to be tested.

[0031] In a circuit board, the circuit board typically has a first mounting terminal and a second mounting terminal that are electrically connected to both ends of a copper foil, respectively. In some embodiments, the first terminal has a first mounting hole for screwing and fixing the first mounting terminal to the circuit board for electrical connection with the copper foil of the circuit board.

[0032] In some embodiments, the second terminal is provided with a second mounting hole for screwing and fixing to the second mounting terminal so as to electrically connect with the copper foil of the circuit board.

[0033] In some embodiments, the first mounting terminal is provided with a first threaded hole, and the test equipment 1000 includes a first bolt, which is used to pass through the first mounting hole and then screw and fix to the first threaded hole.

[0034] In some embodiments, the second mounting terminal is provided with a second threaded hole, and the test device 1000 includes a second bolt, which is used to pass through the second mounting hole and then screw it into the second threaded hole.

[0035] In some embodiments, the number of first test leads 4 is at least two. Due to the difficulty in processing large-section wires and the low material utilization rate, the test equipment 1000 provided in this application embodiment uses at least two first test leads 4. Compared with only one first test lead 4, at least two first test leads 4 can share the total current. While meeting the total current carrying capacity requirement, a single first test lead 4 can use a smaller cross-sectional area, which is beneficial to reducing costs.

[0036] In some embodiments, the number of second test leads 5 is at least two. The test device 1000 provided in this application embodiment uses at least two second test leads 5. Compared with only one second test lead 5, at least two second test leads 5 can share the total current. While meeting the total current carrying capacity requirement, a single second test lead 5 can use a smaller cross-sectional area, which is beneficial to reducing costs.

[0037] In some embodiments, voltage regulator 1 includes, but is not limited to, an autotransformer voltage regulator.

[0038] Please see Figure 1 and Figure 2In some embodiments, the voltage regulator 1 includes a first winding 11 and a sliding contact 12. The first winding 11 includes a first end and a second end. The sliding contact 12 is slidably disposed between the first end and the second end. The first end is provided with a first terminal 111, and the second end is provided with a second terminal 112 and a third terminal 113. The first terminal 111 is used to connect to the live wire of the mains power supply A, the second terminal 112 is used to connect to the neutral wire of the mains power supply A, and the third terminal 113 and the sliding contact 12 are respectively electrically connected to the primary side of the step-up transformer 2.

[0039] In some embodiments, the power cord 3 includes a first wire 31 and a second wire 32. One end of the first wire 31 is connected to a first terminal 111, one end of the second wire 32 is connected to a second terminal 112, and the other ends of the first wire 31 and the second wire 32 are connected to a plug.

[0040] In some embodiments, the sliding contact 12 is a brush or a carbon brush.

[0041] In some embodiments, the voltage regulator 1 includes an adjustment mechanism, a sliding contact 12 connected to the adjustment mechanism, and the adjustment mechanism is used to drive the sliding contact 12 to reciprocate between a first end and a second end to change the effective number of winding turns of the first winding 11 connected to the circuit.

[0042] In some embodiments, the adjustment mechanism includes an adjustment knob, a transmission component, and a slide rail. The sliding contact 12 is slidably disposed on the slide rail. The sliding contact 12 and the adjustment knob are connected to the transmission component. The adjustment knob is used to drive the transmission component to move, thereby driving the sliding contact 12 to reciprocate on the slide rail.

[0043] In some embodiments, the transmission assembly includes a lead screw and a nut, with the lead screw passing through the nut. One end of the lead screw is connected to an adjustment knob, and the nut is connected to a sliding contact. The adjustment knob is used to drive the lead screw to rotate, thereby driving the nut to move linearly, which in turn drives the sliding contact to move between the first end and the second end.

[0044] Please see Figures 1-3 In some embodiments, the primary side of the current booster transformer 2 includes a primary winding 21, and the secondary side of the current booster transformer 2 includes a secondary winding 22. One end of the primary winding 21 is provided with a fourth terminal 211, and the other end of the primary winding 21 is provided with a fifth terminal 212. One end of the secondary winding 22 is provided with a sixth terminal 221, and the other end of the secondary winding 22 is provided with a seventh terminal 222. The fourth terminal 211 is connected to the sliding contact 12, the fifth terminal 212 is connected to the third terminal 113, and the sixth terminal 221 and the seventh terminal 222 are connected to one end of the test circuit.

[0045] In some embodiments, the sixth endpoint 221 is connected to the first end of the first test lead 4, and the seventh endpoint 222 is connected to the first end of the second test lead 5.

[0046] It is understood that the parameters of the voltage regulator 1 and the step-up transformer 2 can be set according to actual needs. For example, in some embodiments, the mains power supply A is 220V, the output voltage of the voltage regulator 1 is adjustable from 0 to 250V, the capacity of the step-up transformer 2 is 500VA, and the turns ratio of the primary winding 21 and the secondary winding 22 of the step-up transformer 2 is 200:1.

[0047] In some embodiments, the test device 1000 includes a temperature measuring device 6, which includes a main body, a connecting wire, and a temperature measuring probe. One end of the connecting wire is connected to the main body, and the other end of the connecting wire is connected to the temperature measuring probe. The temperature measuring probe is used to contact the surface of the conductor B to be tested.

[0048] In some embodiments, the temperature probe is used to be attached and fixed to the surface of the conductor B to be tested.

[0049] In some embodiments, the temperature measuring device 6 includes a thermal imager.

[0050] In some embodiments, the test equipment 1000 includes a host computer, which is equipped with a display screen, and a current monitoring device 7 and / or a temperature measuring device 6 are communicatively connected to the host computer.

[0051] In some embodiments, the host computer includes, but is not limited to, a personal computer, a tablet computer, etc.

[0052] In some embodiments, the current monitoring device 7 includes a current sensor disposed in the test circuit, and the current sensor is used to measure the current in the test circuit.

[0053] In some embodiments, the first test lead 4 is passed through the current sensor, or the second test lead 5 is passed through the current sensor.

[0054] In some embodiments, the main body of the temperature measuring device 6 and the current sensor are connected to the host computer via wires, and the monitoring results of the temperature measuring device 6 and the current sensor are displayed on the screen.

[0055] In other embodiments, the current monitoring device 7 includes an oscilloscope connected to a current sensor, which is used to convert the signal output by the current sensor into a visualized current waveform.

[0056] In other embodiments, the current monitoring device 7 is a clamp-on ammeter, which is used to measure the current in the test circuit. The current value output by the transformer can be directly observed through the display screen of the clamp-on ammeter.

[0057] In some embodiments, it is clamped to the first test lead 4 or the second test lead 5.

[0058] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations 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 patent protection scope of this application.

Claims

1. A testing device, characterized in that, include: A voltage regulator, the input terminal of which is used for electrical connection to the mains power supply; A current-boosting transformer, wherein the primary side of the current-boosting transformer is connected to the output terminal of the voltage regulator; A test circuit, one end of which is connected to the secondary side of the current-boosting transformer, and the other end of which is used to connect to the conductor under test; A current monitoring device is used to measure the output current of a step-up transformer.

2. The testing equipment according to claim 1, characterized in that, The test circuit includes a first test lead and a second test lead. The first end of the first test lead is connected to the secondary side of the current-boosting transformer, and the second end of the first test lead is used to electrically connect to one end of the conductor under test. The first end of the second test lead is connected to the secondary side of the current-boosting transformer, and the second end of the second test lead is used to electrically connect to the other end of the conductor under test.

3. The testing equipment according to claim 2, characterized in that, The second end of the first test lead is provided with a first terminal, which is used to connect to one end of the conductor under test; and / or The second end of the second test lead is provided with a second terminal, which is used to connect to the other end of the conductor under test.

4. The testing equipment according to claim 1, characterized in that, The voltage regulator includes a first winding and a sliding contact. The first winding includes a first end and a second end. The sliding contact is slidably disposed between the first end and the second end. The first end has a first terminal point, and the second end has a second terminal point and a third terminal point. The first terminal point is used to connect to the live wire of the mains power supply, the second terminal point is used to connect to the neutral wire of the mains power supply, and the third terminal point and the sliding contact are electrically connected to the primary side of the step-up transformer.

5. The testing equipment according to claim 4, characterized in that, The primary side of the current-boosting transformer includes a primary winding, and the secondary side of the current-boosting transformer includes a secondary winding. One end of the primary winding is provided with a fourth terminal, and the other end of the primary winding is provided with a fifth terminal. One end of the secondary winding is provided with a sixth terminal, and the other end of the secondary winding is provided with a seventh terminal. The fourth terminal is connected to the sliding contact, the fifth terminal is connected to the third terminal, and the sixth and seventh terminals are connected to one end of the test circuit.

6. The testing equipment according to claim 1, characterized in that, The device includes a temperature measuring device, which comprises a main body, a connecting wire, and a temperature measuring probe. One end of the connecting wire is connected to the main body, and the other end of the connecting wire is connected to the temperature measuring probe, which is used to abut against the surface of the conductor to be measured; and / or, the temperature measuring device includes a thermal imager.

7. The testing equipment according to claim 6, characterized in that, It includes a host computer, which is equipped with a display screen, and the current monitoring device and / or the temperature measuring device are communicatively connected to the host computer.

8. The testing equipment according to claim 1, characterized in that, The current monitoring device includes a current sensor, which is disposed in the test circuit and is used to measure the current in the test circuit.

9. The testing equipment according to claim 8, characterized in that, The current monitoring device includes an oscilloscope, which is connected to the current sensor.

10. The testing equipment according to claim 1, characterized in that, The current monitoring device is a clamp meter, which is used to measure the current in the test circuit.

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