Board card calibration measuring board and testing machine
By introducing a switching module into the board calibration measurement board and connecting the automated control instrument module with the test machine backplane bus, the problem of low efficiency in traditional board calibration is solved, and efficient and accurate calibration measurement is achieved.
Patent Information
- Application Number
- CN202520489401.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-19
AI Technical Summary
Traditional board calibration solutions are inefficient due to low calibration measurement efficiency and the need to manually switch cable connection methods.
Design a board calibration measurement board, including a switching module. The switch is controlled by a signal to automatically change the connection between the measurement interface of the instrument module and the backplane bus of the test machine, so as to realize the measurement of calibration data of different types of devices.
It improves calibration and measurement efficiency, avoids errors introduced by human operation, and achieves automated line switching and higher measurement accuracy.
Smart Images
Figure CN223955790U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of semiconductor testing, in particular to a board card calibration measurement board and a test machine. BACKGROUND
[0002] Semiconductor automatic testing refers to detecting various parameter indexes of a device under test (DUT) by using an automatic test equipment (ATE) to eliminate defective products to control the quality of semiconductor products. In the calibration process of the automatic test equipment, a calibration board switching cable connection mode is often used to connect external instruments to calibrate devices on a board card. In a traditional board card calibration scheme, different calibration and connection modes are used according to different devices on the board card, and a cable connection mode needs to be manually switched to measure calibration parameters and realize different calibration functions, which has the disadvantage of low calibration measurement efficiency. CONTENT OF THE UTILITY MODEL
[0003] Therefore, it is necessary to provide a board card calibration measurement board and a test machine that can improve calibration measurement efficiency in view of the above problems.
[0004] The first aspect of the present application provides a board card calibration measurement board, comprising a switching switch module, the switching switch module is connected with a plurality of measurement interfaces of an instrument module and a backplane bus of a test machine; the switching switch module switches according to the received signal, changes the connection link between each measurement interface of the instrument module and the backplane bus of the test machine, so that the instrument module measures the calibration data of different types of devices in the resource board card of the test machine.
[0005] In one embodiment, the instrument module is a multimeter, the backplane bus comprises an HF line, an HS line, an LF line and an LS line; the switching switch module comprises a switch K1, a switch K3, a switch K4, a switch K6, a switch K7 and a switch K8, a first end of the switch K1 is connected with the HF line, a second end of the switch K1 is connected with an INPUT_HI interface of the multimeter, a first end of the switch K3 is connected with the HS line, a second end of the switch K3 is connected with the INPUT_HI interface of the multimeter, a first end of the switch K4 is connected with the LF line, a second end of the switch K4 is connected with an INPUT_LO interface of the multimeter, a first end of the switch K6 is connected with the LS line, a second end of the switch K6 is connected with the INPUT_LO interface of the multimeter, a first end of the switch K7 is connected with the HS line, a second end of the switch K7 is connected with a SENSE_HI interface of the multimeter, a first end of the switch K8 is connected with the LS line, and a second end of the switch K8 is connected with a SENSE_LO interface of the multimeter.
[0006] Wherein, when the switch K1, the switch K4, the switch K7 and the switch K8 are closed, the measurement is carried out by the four-line method of the multimeter; when the switch K3 and the switch K6 are closed, the measurement is carried out by the two-line method of the multimeter.
[0007] In one of the embodiments, the switch module further comprises a switch K11 and a switch K12, the first end of the switch K11 is connected to the first end of the switch K1, the second end of the switch K11 is connected to the second end of the switch K7, the first end of the switch K12 is connected to the first end of the switch K4, and the second end of the switch K12 is connected to the second end of the switch K8.
[0008] In one of the embodiments, the switch module further comprises a switch K2 and a switch K5, the first end of the switch K2 is connected to the first end of the switch K1, the second end of the switch K2 is connected to the second end of the switch K1 and the second end of the switch K3, the first end of the switch K5 is connected to the first end of the switch K4, and the second end of the switch K5 is connected to the second end of the switch K4 and the second end of the switch K6.
[0009] In one of the embodiments, the board card calibration measurement board further comprises a controller connected to the switch module, and the controller sends a signal to the switch module for switch control.
[0010] The second aspect of the application provides a test machine, comprising a test machine and the above-mentioned board card calibration measurement board.
[0011] In one of the embodiments, the test machine further comprises an industrial computer, the industrial computer is connected to the test machine and the controller in the board card calibration measurement board, the industrial computer controls the resource board card in the test machine to connect the device to be calibrated to the backplane bus, and according to the type of the device to be calibrated, the industrial computer sends a control instruction to the controller, and the controller controls the switch module according to the received control instruction.
[0012] In one of the embodiments, the test machine comprises a resource board card, a communication board and a backplane, the resource board card is connected to the backplane, the communication board is connected to the backplane and the industrial computer, and the backplane is connected to the switch module in the board card calibration measurement board through the backplane bus.
[0013] In one of the embodiments, the resource board card comprises a digital board and / or a power supply board, and the device to be calibrated comprises at least one of a resistor, an ADC and a DAC.
[0014] In one of the embodiments, the industrial computer is further connected with the instrument module, and the corresponding device is calibrated according to the measurement data output by the instrument module.
[0015] The switching module is connected with the plurality of measurement interfaces of the instrument module and the backplane bus of the test machine, and switches according to the received signal, changes the connection link between the measurement interfaces of the instrument module and the backplane bus of the test machine, so as to measure the calibration data of different types of devices in the resource board of the test machine by the instrument module. The link connection relationship between the measurement interfaces of the instrument module and the backplane bus of the test machine can be automatically switched according to the received signal, so as to calibrate the devices of different types in the resource board, and the calibration measurement efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 The structural block diagram of the board calibration measurement board in one of the embodiments is shown in the figure;
[0017] Figure 2 The structural schematic diagram of the board calibration measurement board in one of the embodiments is shown in the figure;
[0018] Figure 3 The structural schematic diagram of the test machine in one of the embodiments is shown in the figure. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not intended to limit the present application.
[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
[0021] It can be understood that, in the following embodiments, "connection" between the circuits, modules, units, etc. connected with each other should be understood as "electrical connection", "communication connection", etc. if there is an electrical signal or data transmission between them.
[0022] As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. It should also be understood that the term "comprising" or "including" or "having" etc. specifies the presence of stated features, integers, operations, components, parts, or combinations thereof, but does not exclude the presence or addition of one or more other features, integers, operations, components, parts, or combinations thereof.
[0023] In one embodiment, such as Figure 1 As shown, a board calibration measurement board is provided, including a switching module 110. The switching module 110 connects multiple measurement interfaces of an instrument module 300 to the backplane bus of a test bench. The switching module 110 switches the connection between the measurement interfaces of the instrument module 300 and the backplane bus of the test bench according to the received signals, so that the instrument module 300 can perform calibration data measurement on different types of devices in the resource board of the test bench. The resource board of the test bench includes devices that need to be calibrated, such as resistors, ADCs (analog-to-digital converters), and DACs (digital-to-analog converters). The instrument module 300 can be a multimeter or other testing instruments. Further, as... Figure 2 As shown, the board calibration measurement board may also include a controller 120 connected to the switching module 110, and the controller 120 sends a signal to the switching module 120 to perform switching control.
[0024] The switch in the switching module 110 can be a relay, optocoupler or other type of control switch. The controller 120 can be an FPGA, CPU, MCU or other devices. The controller 120 can be connected to the industrial control computer EWS via a USB cable and / or RS485 bus. After the industrial control computer EWS control resource board switches the corresponding device to be connected to the backplane bus, it sends a control command to the controller 120. The controller 120 switches the switching module 120 according to the received control command, so that the instrument module 300 can perform calibration data measurement on the device through the corresponding link.
[0025] In one embodiment, the instrument module 300 is a multimeter, such as... Figure 2As shown, the multimeter includes a SENSE interface and an INPUT interface, the SENSE interface includes a SENSE_HI interface and a SENSE_LO interface, the INPUT interface includes an INPUT_HI interface and an INPUT_LO interface, and the backplane bus includes an HF line, an HS line, an LF line, and an LS line. The switch module 110 includes switches K1, K3, K4, K6, K7, and K8, the first end of the switch K1 is connected to the HF line, the second end of the switch K1 is connected to the INPUT_HI interface of the multimeter, the first end of the switch K3 is connected to the HS line, the second end of the switch K3 is connected to the INPUT_HI interface of the multimeter, the first end of the switch K4 is connected to the LF line, the second end of the switch K4 is connected to the INPUT_LO interface of the multimeter, the first end of the switch K6 is connected to the LS line, the second end of the switch K6 is connected to the INPUT_LO interface of the multimeter, the first end of the switch K7 is connected to the HS line, the second end of the switch K7 is connected to the SENSE_HI interface of the multimeter, the first end of the switch K8 is connected to the LS line, and the second end of the switch K8 is connected to the SENSE_LO interface of the multimeter. When the switches K1, K4, K7, and K8 are closed, the multimeter is used for four-wire measurement; and when the switches K3 and K6 are closed, the multimeter is used for two-wire measurement.
[0026] Further, the switch module 110 can further include switches K11 and K12, the first end of the switch K11 is connected to the first end of the switch K1, the second end of the switch K11 is connected to the second end of the switch K7, the first end of the switch K12 is connected to the first end of the switch K4, and the second end of the switch K12 is connected to the second end of the switch K8. Each of the switches can be a relay, and the controller 120 is connected to the control end of each switch to control the on-off switching of each switch.
[0027] In the use of the test machine, in order to ensure the test accuracy, the test machine needs to be calibrated for each device, and the connection mode used for calibrating different devices is different, and usually involves different devices on different resource boards. Taking the calibration of a sampling resistor and a DAC as an example, the sampling resistor is measured by using the multimeter four-wire method, and the DAC is measured by using the multimeter two-wire method. By adding the switch module 110 between the HS, LS, HF, and LF four bus lines of the backplane and the SENSE_HI, SENSE_LO, INPUT_HI, and INPUT_LO four interfaces of the multimeter, automatic switching of the line is realized, and the frequent line switching operation during four-wire measurement and two-wire measurement is avoided during calibration, thereby improving the calibration efficiency.
[0028] Specifically, referring to Figure 2In the initial state, the switches between the HS line and the SENSE_HI interface, the LS line and the SENSE_LO interface, the HF line and the INPUT_HI interface, and the LF line and the INPUT_LO interface are all in the open state, and the four buses are in the suspended state. When the four-wire method of the multimeter is used for measurement, the switches K1, K4, K7 and K8 are closed, the HS line is connected to the SENSE_HI interface, the LS line is connected to the SENSE_LO interface, the HF line is connected to the INPUT_HI interface, and the LF line is connected to the INPUT_LO interface, and the remaining switches remain open. After the four-wire method calibration is completed, all the switches are opened. Then, the switches K3 and K6 are closed, the HS line is connected to the INPUT_HI interface, the LS line is connected to the INPUT_LO interface, and the remaining switches remain open, that is, the switching between the four-wire method measurement and the two-wire method measurement is completed.
[0029] It can be understood that according to the actual test needs, other link connection relationships can also be switched in the switching switch module 110, for example, the switches K11 and K12 are closed, and the HF line can also be connected to the SENSE_HI interface and the LF line can also be connected to the SENSE_LO interface, thereby providing more test function selection.
[0030] In addition, the switching switch module can also include the switches K2 and K5, the first end of the switch K2 is connected to the first end of the switch K1, the second end of the switch K2 is connected to the second end of the switch K1 and the second end of the switch K3, the first end of the switch K5 is connected to the first end of the switch K4, and the second end of the switch K5 is connected to the second end of the switch K4 and the second end of the switch K6. The switch K2 is connected in parallel with the switch K1, and the two are synchronously controlled, and the switch K5 is connected in parallel with the switch K4, and the two are synchronously controlled. In the embodiment, the parallel connection of the switches K2 and K1 and the parallel connection of the switches K5 and K4 have the following effects:
[0031] 1. In the four-wire method measurement, two lines need to pass through the current, and the parallel connection of the two switches can improve the load capacity of the line.
[0032] 2. The parallel connection of the switches and the synchronous control can reduce the line impedance caused by the switches.
[0033] 3. The parallel connection of the switches can improve the measurement reliability of the board card calibration measurement board.
[0034] In one embodiment, as Figure 3As shown, a test machine is also provided, which includes the test machine table 200 and the above-mentioned board card calibration measurement board. Further, the test machine also includes an industrial computer EWS, which is connected to the controller 120 in the test machine table 200 and the board card calibration measurement board. The industrial computer EWS outputs a control signal to the test machine table 200, controls the resource board card in the test machine table 200 to connect the device to be calibrated to the backplane bus, and issues a control instruction to the controller 120 according to the type of the device to be calibrated. The controller 120 controls the switching of the switch module 110 according to the received control instruction. The industrial computer EWS can also be connected to the instrument module 300, and output a control signal to configure the parameters of the instrument module 300, so that the multimeter can measure the calibration parameters of the corresponding device. In addition, the industrial computer can calibrate the corresponding device according to the measurement data output by the instrument module 300.
[0035] In the calibration automation control process, the industrial computer EWS is used for automation control. During calibration, the industrial computer EWS first communicates with the communication board 210, which sends the calibration instruction sent by the industrial computer EWS to the corresponding resource board card, and then the resource board card connects the specified device to be calibrated to the backplane bus through the relay on the resource board card. The switching of the switch module 110 in the board card calibration measurement board is controlled by the controller 120. According to the calibration item requirement, the industrial computer EWS connects the controller 120 through the USB line or the RS485 bus, issues a corresponding control instruction, and then the controller 120 analyzes and converts the control instruction into a corresponding switch action to complete the switching and returns the instruction execution result to the industrial computer EWS. After the test link is successfully built, the industrial computer EWS controls the external instrument module 300 to measure data, thereby realizing the calibration of the specified device. Repeating the above operation can realize the automatic calibration process of the specified device on all board cards.
[0036] In the calibration automation control process, the industrial computer EWS is used for automation control. During calibration, the industrial computer EWS first communicates with the communication board 210, which sends the calibration instruction sent by the industrial computer EWS to the corresponding resource board card, and then the resource board card connects the specified device to be calibrated to the backplane bus through the relay on the resource board card. The switching of the switch module 110 in the board card calibration measurement board is controlled by the controller 120. According to the calibration item requirement, the industrial computer EWS connects the controller 120 through the USB line or the RS485 bus, issues a corresponding control instruction, and then the controller 120 analyzes and converts the control instruction into a corresponding switch action to complete the switching and returns the instruction execution result to the industrial computer EWS. After the test link is successfully built, the industrial computer EWS controls the external instrument module 300 to measure data, thereby realizing the calibration of the specified device. Repeating the above operation can realize the automatic calibration process of the specified device on all board cards.
[0037] The board card calibration measurement board and the testing machine realize automatic switching operation of the line, improve the efficiency of the calibration operation, and avoid the error caused by manual switching and the connection precision error.
[0038] The technical features of the above-described embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the description.
[0039] The above-described embodiments only express several implementation manners of the application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the application, and these all belong to the protection scope of the application. Therefore, the protection scope of the patent of the application should be subject to the appended claims.
Claims
1. A board calibration measurement board, characterized in that, The system includes a switching module that connects multiple measurement interfaces of the instrument module to the backplane bus of the test bench. The switching module switches the connection between the measurement interfaces of the instrument module and the backplane bus of the test bench according to the received signals, thereby enabling the instrument module to perform calibration data measurement on different types of devices in the resource boards of the test bench.
2. The board calibration and measurement board according to claim 1, characterized in that, The instrument module is a multimeter. The backplane bus includes HF line, HS line, LF line, and LS line. The switching module includes switches K1, K3, K4, K6, K7, and K8. The first end of switch K1 is connected to the HF line, and the second end of switch K1 is connected to the INPUT_HI interface of the multimeter. The first end of switch K3 is connected to the HS line, and the second end of switch K3 is connected to the INPUT_HI interface of the multimeter. The first end of switch K4 is connected to the LF line, and the second end of switch K4 is connected to the INPUT_LO interface of the multimeter. The first end of switch K6 is connected to the LS line, and the second end of switch K6 is connected to the INPUT_LO interface of the multimeter. The first end of switch K7 is connected to the HS line, and the second end of switch K7 is connected to the SENSE_HI interface of the multimeter. The first end of switch K8 is connected to the LS line, and the second end of switch K8 is connected to the SENSE_LO interface of the multimeter. When switches K1, K4, K7, and K8 are closed, measurements are taken using a four-wire multimeter; when switches K3 and K6 are closed, measurements are taken using a two-wire multimeter.
3. The board calibration and measurement board according to claim 2, characterized in that, The switching module further includes switches K11 and K12. The first end of switch K11 is connected to the first end of switch K1, the second end of switch K11 is connected to the second end of switch K7, the first end of switch K12 is connected to the first end of switch K4, and the second end of switch K12 is connected to the second end of switch K8.
4. The board calibration measurement board according to claim 2 or 3, characterized in that, The switching module further includes switch K2 and switch K5. The first end of switch K2 is connected to the first end of switch K1, the second end of switch K2 is connected to the second end of switch K1 and the second end of switch K3, the first end of switch K5 is connected to the first end of switch K4, and the second end of switch K5 is connected to the second end of switch K4 and the second end of switch K6.
5. The calibration and measurement board according to any one of claims 1-3, characterized in that, It also includes a controller connected to the switching module, which sends signals to the switching module to control the switching.
6. A testing machine, characterized in that, It includes a testing machine and a board calibration measurement board as described in any one of claims 1-5.
7. The testing machine according to claim 6, characterized in that, It also includes an industrial control computer, which is connected to the test bench and the controller in the board calibration measurement board. The industrial control computer controls the resource board in the test bench to connect the device to be calibrated to the backplane bus, and sends control commands to the controller according to the type of the device to be calibrated. The controller controls the switching module to switch on and off according to the received control commands.
8. The testing machine according to claim 7, characterized in that, The test bench includes a resource board, a communication board, and a backplane. The resource board is connected to the backplane, the communication board is connected to the backplane and the industrial control computer, and the backplane is connected to the switching switch module in the calibration and measurement board of the board via a backplane bus.
9. The testing machine according to claim 8, characterized in that, The resource board includes a digital board and / or a power board, and the device to be calibrated includes at least one of a resistor, an ADC, and a DAC.
10. The testing machine according to claim 7, characterized in that, The industrial control computer is also connected to an instrument module, which calibrates the corresponding devices based on the measurement data output by the instrument module.