CN210742443U - Signal test auxiliary device - Google Patents

Abstract

This utility model provides a signal testing auxiliary device, relating to the field of circuit testing technology. The signal testing auxiliary device includes a switching unit, which is electrically connected to both a test board and an oscilloscope. The switching unit is used to transmit the signal under test from any point on the test board to any test channel of the oscilloscope. This signal testing auxiliary device can improve testing efficiency and accuracy.

Description

Signal Test Auxiliary Device

technical field

The utility model relates to the technical field of circuit testing, in particular to an auxiliary device for signal testing.

Background technique

The circuit board needs to perform a performance test after the wiring is completed. At present, when the performance test of the circuit board is performed, it is necessary to debug the oscilloscope while manually switching between the jumper of the test point and the signal line of the oscilloscope, which is time-consuming and laborious. It is easy to make mistakes in the switching process between the connecting line of the test point and the signal line of the oscilloscope.

Utility model content

The purpose of the present invention is to provide an auxiliary device for signal testing, through which the testing efficiency and accuracy can be improved.

In order to achieve the above purpose, the technical scheme adopted by the present utility model is as follows:

In the first aspect, an embodiment of the present invention provides an auxiliary device for signal testing, including a switch unit, the switch unit is electrically connected to the test board and the oscilloscope; the switch unit is used to The signal to be tested is transmitted to any test channel of the oscilloscope.

Further, the switch unit includes a plurality of SPMT switches, each SPMT switch is electrically connected to a different signal point to be tested on the test board, and each SPMT switch is electrically connected to each test channel of the oscilloscope. .

Further, each single-pole multi-throw switch includes a first input end and a plurality of first output ends, the first input end is electrically connected to a signal point to be measured on the test board, and the plurality of first output ends are respectively connected to the oscilloscope. The test channels are electrically connected in one-to-one correspondence.

Further, the signal test auxiliary device also includes a controller and a prompt unit, the controller is electrically connected with each SPMT switch and the prompt unit; the controller is used to detect the conduction state of each SPMT switch, and when the SPMT When the multi-throw switch is turned on, the prompting unit is controlled to send a prompting signal.

Further, the switch unit includes a switch button, each signal point to be tested on the test board is electrically connected with a plurality of switch buttons, and the plurality of switch buttons are respectively electrically connected to the test channels of the oscilloscope in a one-to-one correspondence.

Further, each switch button includes a second input terminal and a second output terminal, the second input terminal is electrically connected to any signal point to be measured on the test board, and the second output terminal is electrically connected to any test channel of the oscilloscope. .

Further, the signal test auxiliary device also includes a controller, and the controller is electrically connected to each switch button; the controller is used to detect the conduction state of each switch button, and control the electrical connection with the switch button when the switch button is turned on. The rest of the switch buttons at the same signal point to be tested are disconnected.

Further, the signal testing auxiliary device further includes a prompting unit, and the controller is electrically connected to the prompting unit; the controller is used to control the prompting unit to send a prompting signal when the switch button is turned on.

Further, the prompt unit includes a signal lamp, and the controller is electrically connected to the signal lamp; the controller is used to control the signal lamp to send a prompt signal when the switch unit is turned on.

Further, the prompting unit further includes a switch tube, and the controller is electrically connected with the signal lamp through the switch tube.

The beneficial effect of the signal test auxiliary device provided by the utility model is that the signal to be tested at any signal point to be measured on the test board is transmitted to any test channel of the oscilloscope through the switch unit of the signal test auxiliary device. During the actual test, the staff connects the signal points to be tested on the test board to the switch unit through jumpers, and presses the switch unit to electrically connect the signal points to be tested with the test channel corresponding to the oscilloscope. Then, the signal to be tested is transmitted to the corresponding test channel for measurement, and there is no need to manually switch between the jumper at the signal point to be tested and the signal line of the oscilloscope, which avoids the short circuit caused by the touch between the jumpers. The test efficiency and accuracy are also improved.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings that need to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention. Therefore, it should not be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can also be obtained from these drawings without any creative effort.

Fig. 1 is the structural block diagram of the signal test auxiliary device that the utility model provides;

FIG. 2 is one of the schematic structural diagrams of the switch unit provided by the utility model;

3 is one of the structural schematic diagrams of the signal test auxiliary device provided by the utility model;

Fig. 4 is the second structural schematic diagram of the switch unit provided by the utility model;

Fig. 5 is the second structural schematic diagram of the signal test auxiliary device provided by the utility model;

FIG. 6 is a schematic structural diagram of a prompting unit provided by the present invention.

Icons: 1-signal test auxiliary device; 10-switch unit; 20-controller; 30-prompt unit; 31-signal lamp; 32-switch tube; 2-test board; 3-oscilloscope; K1-single-pole multi-throw switch; K2 -Switch button.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The embodiments described above are a part of the embodiments of the present invention, but not all of the embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that is usually placed when the utility model product is used, or the orientation or positional relationship that is commonly understood by those skilled in the art, It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

Furthermore, the terms "first", "second", "third", etc. are only used to differentiate the description and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "arrangement", "installation", "connection" and "connection" should be understood in a broad sense, for example, it may be a fixed connection It can be detachable connection or integral connection; it can be mechanical connection or connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Example

Please refer to FIG. 1 , which is a structural block diagram of a signal testing auxiliary device 1 provided by the present invention. The signal testing auxiliary device 1 includes a switch unit 10 , and the switch unit 10 is electrically connected to the test board 2 and the oscilloscope 3 .

In this embodiment, the switch unit 10 is used to transmit the signal to be tested at any signal point to be tested on the test board 2 to any test channel on the oscilloscope 3 .

It can be understood that during the actual test, the staff electrically connects each signal point to be tested on the test board 2 with the signal line of the oscilloscope 3 through the switch unit 10 through jumper wires in advance, thereby realizing the connection with each test channel of the oscilloscope 3. All electrical connections are required. When debugging the oscilloscope 3, if you need to replace the signal point or test channel to be tested, you only need to operate the switch unit 10, and it is not necessary to perform the jumper between the signal point to be tested and the signal line of the oscilloscope 3. The manual switching between the jumpers avoids the short circuit caused by the touch between the jumpers, and also improves the test efficiency and accuracy.

Further, in this embodiment, as shown in FIG. 2 , it is a schematic structural diagram of the switch unit 10 shown in FIG. 1 . The switch unit 10 includes a plurality of SPMT switches K1, each SPMT switch K1 is electrically connected to different signal points to be tested on the test board 2, and each SPMT switch K1 is connected to each of the oscilloscope 3 Test channel electrical connections.

In this embodiment, each single-pole multi-throw switch K1 includes a first input terminal and a plurality of first output terminals, the first input terminal is electrically connected to a signal point to be tested on the test board 2, and a plurality of first output terminals are The output ends are respectively electrically connected with the test channels on the oscilloscope 3 in one-to-one correspondence.

It can be understood that if the test channels of the oscilloscope 3 are set to 4, then the SPMT switch K1 is correspondingly set to a SPMT switch, that is, the first output terminal of the SPMT switch K1 is set to 4, and each SPMT switch is set to 4. The four first output terminals of the switch K1 are electrically connected to the four test channels in one-to-one correspondence, and the number of SPMD switches K1 is consistent with the number of signal points to be tested. The number of the corresponding single-pole multi-throw switches K1 is also 5.

Further, in this embodiment, as shown in FIG. 3 , under the structure of the switch unit 10 shown in FIG. 2 , the signal test auxiliary device 1 further includes a controller 20 and a prompt unit 30 , and the controller 20 is connected to each single pole The multi-throw switch K1 and the prompt unit 30 are both electrically connected.

In this embodiment, the controller 20 is used to detect the conduction state of each SPMT switch K1, and control the prompt unit 30 to send a prompt signal when the SPMT switch K1 is turned on.

It can be understood that the controller 20 includes a plurality of signal input terminals, and each signal input terminal is respectively electrically connected to the first input terminal and the plurality of first output terminals of each SPMT switch K1. The multiple first output terminals of K1 are respectively electrically connected to the test channels of the oscilloscope 3 in one-to-one correspondence, and each signal input terminal of the controller 20 is respectively connected to the first input terminal of each single-pole multi-throw switch K1 and each of the oscilloscope 3 The test channels are all electrically connected.

For example, if the number of signal points to be measured on the test board 2 is 2, corresponding to the first signal point to be measured and the second signal point to be measured, the oscilloscope 3 has 2 test channels, corresponding to the first test channel And the second test channel, the SPMD switch K1 is set to two SPDT switches correspondingly, corresponding to the first SPDT switch and the second SPDT switch, and the controller 20 is correspondingly set to four signal input terminals, corresponding to The first signal input end, the second signal input end, the third signal input end and the fourth signal input end; if the first signal point to be tested is electrically connected to the first test channel and the second test channel through the first SPDT switch connection, the second signal point to be tested is electrically connected to both the first test channel and the second test channel through the second SPDT switch, the first signal input terminal is electrically connected to the first input terminal of the first SPDT switch, and the first signal input terminal is electrically connected to the first input terminal of the first SPDT switch. The second signal input terminal is electrically connected to the first input terminal of the second SPDT switch, the third signal input terminal is electrically connected to the first test channel, and the fourth signal input terminal is electrically connected to the second test channel; When the signal to be tested of the signal point is transmitted to the first test channel for testing, the first input end of the first SPDT switch is electrically connected to the first output end electrically connected to the first test channel, and the first signal of the controller 20 is electrically connected. Both the input terminal and the third signal input terminal will receive the signal to be measured at the first signal point to be measured, then the controller 20 will control the prompting unit 30 according to the signal to be measured received by the first signal input terminal and the third signal input terminal. Send the first prompt signal, so that the staff know that the first test channel of the oscilloscope 3 is testing the signal to be tested at the first signal point to be tested according to the first prompt signal; when the signal to be tested of the first signal point to be tested is transmitted to the When the two test channels are tested, the first input end of the first SPDT switch is electrically connected to the first output end electrically connected to the second test channel, and the first signal input end and the fourth signal input end of the controller 20 are both will receive the signal to be measured at the first signal point to be measured, then the controller 20 will control the prompting unit 30 to send a second prompting signal according to the signal to be measured received by the first signal input terminal and the fourth signal input terminal, so that the staff can According to the second prompt signal, it is known that the second test channel of the oscilloscope 3 is testing the to-be-tested signal at the first to-be-tested signal point; the manner of testing other to-be-tested signal points in different test channels is the same as the above-mentioned manner.

When different signal points to be tested are tested in different test channels, different signal points to be tested are tested in the same test channel, or the same signal point to be tested is tested in different test channels, the prompt unit 30 will generate different prompt signals, so that the staff may The prompt signal distinguishes which signal point to be tested is tested in which test channel, which is convenient for the staff to test quickly and improves work efficiency.

Further, in this embodiment, as shown in FIG. 4 , it is another schematic structural diagram of the switch unit 10 shown in FIG. 1 . The switch unit 10 includes a switch button K2 , each signal point to be tested on the test board 2 is electrically connected to a plurality of switch buttons K2 , and the plurality of switch buttons K2 are electrically connected to each test channel of the oscilloscope 3 in a one-to-one correspondence.

In this embodiment, each switch unit 10 includes a second input terminal and a second output terminal, the second input terminal is electrically connected to any signal point to be measured on the test board 2 , and the second output terminal is connected to the signal point of the oscilloscope 3 . Any test channel is electrically connected.

It can be understood that if the test channels of the oscilloscope 3 are set to 4, then each signal point to be tested is correspondingly set with 4 switch buttons K2, that is, the second input terminals of the 4 switch buttons K2 are all electrically connected to the same signal to be measured. point, the second output terminals of the four switch buttons K2 are electrically connected to the four test channels respectively.

Further, in this embodiment, as shown in FIG. 5, under the structure of the switch unit 10 shown in FIG. 4, the controller 20 is electrically connected to each switch button K2, and the controller 20 is used to detect each switch button K2. The on state of the switch button K2, and when the switch button K2 is on, the remaining switch buttons K2 electrically connected to the same signal point to be measured as the switch button K2 are controlled to be in the off state.

It can be understood that each signal input terminal of the controller 20 is electrically connected to the second output terminal of each switch button K2, and when the switch button K2 is turned on, the signal input terminal electrically connected to the switch button K2 will receive the signal. The to-be-measured signal of the signal-to-be-measured point electrically connected to the switch button K2, the controller 20 will control other switch buttons K2 electrically connected to the signal-to-be-measured point to be in the disconnected state according to the signal to be measured received at the signal input end , so that the test signal of a test signal point can only enter one test channel for testing.

In this embodiment, the controller 20 is configured to control the prompting unit 30 to send a prompting signal when the switch button K2 is turned on. It can be understood that when the switch button K2 is turned on, the signal input terminal electrically connected to the switch button K2 will receive the signal to be measured flowing through the switch button K2, and the controller 20 will control the prompting unit 30 according to the signal to be measured. Send an alert signal.

For example, the number of signal points to be tested on test board 2 is 2, corresponding to the first signal point to be tested and the second signal point to be tested, and the number of test channels of oscilloscope 3 is 2, corresponding to the first test channel and For the second test channel, four switch buttons K2 are correspondingly set, corresponding to the first switch button, the second switch button, the third switch button and the fourth switch button, and the controller 20 is correspondingly provided with four signal input terminals, corresponding to the first switch button a signal input end, a second signal input end, a third signal input end and a fourth signal input end; if the first signal point to be tested is electrically connected to the first test channel through the first switch button, the first signal point to be tested passes through The second switch button is electrically connected to the second test channel, the second signal point to be tested is electrically connected to the first test channel through the third switch button, the second signal point to be tested is electrically connected to the second test channel through the fourth switch button, The first signal input terminal is electrically connected to the second output terminal of the first switch button, the second signal input terminal is electrically connected to the second output terminal of the second switch button, and the third signal input terminal is electrically connected to the second output terminal of the third switch button The terminal is electrically connected, and the fourth signal input terminal is electrically connected with the second output terminal of the fourth switch button; when the signal to be tested of the first signal point to be tested is transmitted to the first test channel for testing, the second output terminal of the first switch button The input terminal is electrically connected to the second output terminal, the first signal input terminal of the controller 20 will receive the signal to be measured at the first signal point to be measured, and the controller 20 controls the first signal to be measured according to the signal to be measured received by the first signal input terminal. The second switch button is in the off state, and the controller 20 also controls the prompt unit 30 to send the first prompt signal; when the test signal of the second signal point to be tested is transmitted to the second test channel for testing, the second switch button of the fourth switch button The input terminal is electrically connected to the second output terminal, the fourth signal input terminal of the controller 20 will receive the signal to be measured at the second signal point to be measured, and the controller 20 controls the signal to be measured according to the signal to be measured received by the fourth signal input terminal. The three-switch button is in an off state, and the controller 20 also controls the prompting unit 30 to send a second prompting signal. The staff can know which signal point to be tested is tested in which test channel according to the prompt signal, which is convenient for the staff to test quickly, thereby improving work efficiency.

Further, in this embodiment, as shown in FIG. 6 , which is a schematic structural diagram of the prompting unit 30 mentioned above, the prompting unit 30 includes a signal lamp 31 , and the controller 20 is electrically connected to the signal lamp 31 ; the controller 20 is used for When the single-pole multi-throw switch K1 is turned on or when the switch button K2 is turned on, the signal lamp 31 is controlled to send a prompt signal.

It can be understood that the number of signal lights 31 is set to be multiple, and the controller 20 controls different signal lights 31 to work according to the signals to be tested received by different signal input terminals, and then sends different prompt signals. The staff can determine the oscilloscope according to the positions of different signal lights 31. 3. Which test signal of the signal point to be tested is being tested, the staff can determine which test channel of the oscilloscope 3 is being tested according to the different colors of the different signal lights 31 .

Further, in this embodiment, the prompting unit 30 further includes a switch tube 32 , and the controller 20 is electrically connected to the signal lamp 31 through the switch tube 32 . The switch tube 32 is used to drive the signal light 31 to work, that is, when the controller 20 controls the signal light 31 to work, the switch tube 32 amplifies the input current signal of the signal light 31, so that the controller 20 can provide a small current to drive the signal light 31 normally. Work.

Wherein, the switch tube 32 can be a triode or a MOS tube, etc.; the controller 20 can be a single-chip microcomputer, an ARM chip, etc.; the test board 2 can be an Intel (Intel) platform, an Advanced Micro Devices (Advanced Micro Devices, AMD) platform or a Qualcomm (QUALCOMM) platform ) platform circuit board, the signal to be tested that needs to be tested can be the power timing signal.

To sum up, the signal test auxiliary device provided by the present invention transmits the signal to be measured at any signal point to be measured on the test board to any test channel of the oscilloscope through the switch unit of the signal test auxiliary device. During the actual test, the staff connects the signal points to be tested on the test board to the switch unit through jumpers, and presses the switch unit to electrically connect the signal points to be tested with the test channel corresponding to the oscilloscope. Then, the signal to be tested is transmitted to the corresponding test channel for measurement, and there is no need to manually switch between the jumper at the signal point to be tested and the signal line of the oscilloscope, which avoids the short circuit caused by the touch between the jumpers. The test efficiency and accuracy are also improved. And when setting up the signal test auxiliary device, the ground wire can be widely and evenly distributed around the printed circuit board. When connecting the ground of the oscilloscope, you only need to use a clip to connect it, which is not only convenient but also ensures that the tested signal waveform will not be disturbed. .

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. a signal test auxiliary device, is characterized in that, comprises switch unit, and described switch unit and test board and oscilloscope are all electrically connected; The switch unit is used to transmit the signal to be tested at any signal point to be tested on the test board to any test channel of the oscilloscope. 2 . The signal test auxiliary device according to claim 1 , wherein the switch unit comprises a plurality of SPMT switches, and each of the SPMT switches is electrically connected to a different For the signal point to be tested, each of the single-pole multi-throw switches is electrically connected to each of the test channels of the oscilloscope. 3 . The signal test auxiliary device according to claim 2 , wherein each of the single-pole multi-throw switches comprises a first input terminal and a plurality of first output terminals, and the first input terminal is connected to the One of the signal points to be tested on the test board is electrically connected, and the plurality of first output terminals are respectively electrically connected to the test channels of the oscilloscope in one-to-one correspondence. 4. The signal testing auxiliary device according to claim 2, characterized in that, the signal testing auxiliary device further comprises a controller and a prompt unit, and the controller is connected to each of the single-pole multi-throw switches and the prompt unit. electrical connection; The controller is used to detect the conduction state of each of the SPMT switches, and control the prompt unit to send a prompt signal when the SPMT switch is turned on. 5 . The signal test auxiliary device according to claim 1 , wherein the switch unit comprises a switch button, and each of the signal points to be tested on the test board is electrically connected to a plurality of the switch buttons. 6 . , a plurality of the switch buttons are respectively electrically connected to each of the test channels of the oscilloscope in a one-to-one correspondence. 6. The signal test auxiliary device according to claim 5, wherein each of the switch buttons comprises a second input end and a second output end, and the second input end is connected to any other device on the test board. One of the signal points to be tested is electrically connected, and the second output terminal is electrically connected to any one of the test channels of the oscilloscope. 7. The auxiliary device for signal testing according to claim 5, wherein the auxiliary device for signal testing further comprises a controller, and the controller is electrically connected to each of the switch buttons; The controller is used to detect the conduction state of each switch button, and control the other switch buttons that are electrically connected to the same signal point to be measured as the switch button to be disconnected when the switch button is turned on. state. 8. The auxiliary device for signal testing according to claim 7, wherein the auxiliary device for signal testing further comprises a prompting unit, and the controller is electrically connected to the prompting unit; The controller is configured to control the prompting unit to send a prompting signal when the switch button is turned on. 9. The signal test auxiliary device according to claim 4 or 8, wherein the prompt unit comprises a signal lamp, and the controller is electrically connected to the signal lamp; The controller is configured to control the signal lamp to send the prompt signal when the switch unit is turned on. 10 . The signal test auxiliary device according to claim 9 , wherein the prompt unit further comprises a switch tube, and the controller is electrically connected to the signal lamp through the switch tube. 11 .

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