Signal output board and automated test system

Abstract

The present application relates to a signal output board and an automated testing system. The signal output board provided in the embodiment of the present application includes a main controller, a bus module and a signal output module, and the bus module and the signal output module are respectively connected to the main controller. Among them, the bus module is used to connect the host computer and the main controller, and the main controller is used to receive the initial signal sent by the host computer through the bus module, and send the initial signal to the signal output module, and the signal output module is used to output multiple target analog signals in different forms according to the initial signal. The automated testing system provided in the embodiment of the present application includes a host computer and a signal output board, and the bus module in the signal output board is connected to the host computer, and the host computer is used to generate an initial signal and send the initial signal to the main controller through the bus module. The signal output board and the automated testing system provided in the embodiment of the present application can effectively reduce the automated testing cost of the target device.

Description

Technical Field

[0001] The present application relates to the field of automated testing of electronic equipment or components, and in particular, to a signal output board and an automated testing system. Background Art

[0002] In the field of automated testing of electronic equipment or components used in the aerospace industry, it is often necessary to provide various types of analog signals as input stimuli for target devices. These analog signals are used to provide enabling stimuli for target devices or to provide target devices for signal analysis, etc. Therefore, usually, the target device can enter the test state normally only through the combination of such multi-channel analog signals. In the prior art, different types of analog signals need to be implemented through different signal output boards, thus greatly increasing the automated testing cost of the target device. Summary of the invention

[0003] The purpose of this application is to provide a signal output board and an automated testing system to solve the above problems.

[0004] The signal output board provided in the embodiment of the present application includes a main controller, a bus module and a signal output module, wherein the bus module and the signal output module are respectively connected to the main controller;

[0005] The bus module is used to connect the host computer and the main controller;

[0006] The main controller is used to receive the initial signal sent by the host computer through the bus module, and send the initial signal to the signal output module;

[0007] The signal output module is used to output multiple target analog signals in different forms according to the initial signal.

[0008] In combination with the first aspect, the embodiment of the present application further provides a first optional implementation of the first aspect, wherein the signal output module includes a digital-to-analog converter, a first signal output unit, and a second signal output unit, and the digital-to-analog converter is connected to the main controller, the first signal output unit, and the second signal output unit, respectively;

[0009] The digital-to-analog converter is used for converting the initial signal into two intermediate analog signals after receiving the initial signal sent by the main controller, and sending the two intermediate analog signals to the first signal output unit and the second signal output unit respectively;

[0010] The first signal output unit is used to convert the received intermediate analog signal into an analog signal in a DC form;

[0011] The second signal output unit is used to convert the received intermediate analog signal into an analog signal in an alternating current form.

[0012] In combination with the first optional implementation of the first aspect, the embodiment of the present application further provides a second optional implementation of the first aspect, wherein the first signal output unit includes an output driver, an output mode selection end of the output driver is connected to the main controller, and a signal input end of the output driver is connected to the digital-to-analog converter;

[0013] The main controller is also used to receive a mode selection instruction sent by the host computer through the bus module, and send the mode selection instruction to the output driver, the mode selection instruction includes a first selection instruction for indicating the output of an analog voltage signal, and a second selection instruction for indicating the output of an analog current signal;

[0014] The digital-to-analog converter is used for converting the initial signal into two intermediate analog signals after receiving the initial signal sent by the main controller, and sending one of the two intermediate analog signals to the output driver;

[0015] The output driver is used to convert the received intermediate analog signal into an analog voltage signal in a DC form when the mode selection instruction is a first selection instruction, and is used to convert the received intermediate analog signal into an analog current signal in a DC form when the mode selection instruction is a second selection instruction.

[0016] In combination with the first optional implementation of the first aspect, the embodiment of the present application further provides a third optional implementation of the first aspect, wherein the second signal output unit includes an operational amplifier, a positive input terminal of the operational amplifier is connected to the digital-to-analog converter, and a negative input terminal of the operational amplifier is connected to the reference voltage signal;

[0017] The digital-to-analog converter is used for converting the initial signal into two intermediate analog signals after receiving the initial signal sent by the main controller, and sending one of the two intermediate analog signals to the operational amplifier;

[0018] The operational amplifier is used to convert the received intermediate analog signal into an analog voltage signal in the form of AC.

[0019] In combination with the first aspect, the embodiment of the present application further provides a fourth optional implementation of the first aspect, wherein a plurality of signal output modules are provided, the signal output board further comprises a plurality of isolation power supply modules, and the plurality of isolation power supply modules are connected to the plurality of signal output modules in a one-to-one correspondence;

[0020] The isolated power supply module is used to provide working power for the corresponding signal output module.

[0021] In combination with the fourth optional implementation of the first aspect, the embodiment of the present application further provides a fifth optional implementation of the first aspect, wherein the isolated power supply module includes a first adjustment unit and a second adjustment unit, the first adjustment unit and the second adjustment unit are respectively connected to the corresponding signal output module, and the second adjustment unit is also connected to the first adjustment unit;

[0022] The first regulating unit is used to connect to the backplane of the bus module to regulate the initial power signal provided by the backplane to obtain a first target power signal, and the first target power signal is used to access the second regulating unit and to provide part of the working power for the corresponding signal output module;

[0023] The second regulating unit is used to regulate the first target power signal to obtain a second target power signal, and the second target power signal is used to provide another part of working power for the corresponding signal output module.

[0024] In combination with the fourth optional implementation of the first aspect, the embodiment of the present application further provides a sixth optional implementation of the first aspect, wherein the signal output board includes a circuit substrate;

[0025] A plurality of signal output modules are arranged on the circuit substrate in an array manner, and the arrangement positions of the plurality of isolation power modules correspond one to one to the arrangement positions of the plurality of signal output modules.

[0026] In combination with the first aspect, the embodiment of the present application further provides a seventh optional implementation of the first aspect, wherein the signal output board further includes a power conversion module, and the power conversion module is connected to the main controller;

[0027] The power conversion module is used to connect the backplane of the bus module to adjust the initial power signal provided by the backplane to obtain a third target power signal, and the third target power signal is used to provide part of the working power for the main controller.

[0028] In combination with the first aspect, the embodiment of the present application also provides an eighth optional implementation of the first aspect, wherein the bus module includes a PXIe bus module and a PXI bus module, and the control logic of the PXIe bus module and the PXI bus module are integrated inside the main controller.

[0029] In a second aspect, an automated testing system provided in an embodiment of the present application includes a host computer, and a signal output board provided in the first aspect or any optional implementation of the first aspect, wherein a bus module in the signal output board is connected to the host computer;

[0030] The host computer is used to generate an initial signal and send the initial signal to the main controller through the bus module.

[0031] The signal output board provided in the embodiment of the present application includes a main controller, a bus module and a signal output module, and the bus module and the signal output module are respectively connected to the main controller. Wherein, the bus module is used to connect the host computer and the main controller, and the main controller is used to receive the initial signal sent by the host computer through the bus module, and send the initial signal to the signal output module, and the signal output module is used to output multiple target analog signals in different forms according to the initial signal. That is, the signal output board provided in the embodiment of the present application can simultaneously output multiple target analog signals in different forms, so that the target device can normally enter the test state, therefore, the automation test cost of the target device can be effectively reduced.

[0032] The automated testing system provided in the embodiment of the present application has the same beneficial effects as the above-mentioned signal output board, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A schematic structural block diagram of a signal output board provided in an embodiment of the present application.

[0035] Figure 2 A second schematic structural block diagram of the signal output board provided in an embodiment of the present application.

[0036] Figure 3 A schematic diagram of the circuit structure of a signal output module provided in an embodiment of the present application.

[0037] Figure 4 This is a third schematic structural block diagram of the signal output board provided in an embodiment of the present application.

[0038] Figure 5 This is a fourth schematic structural block diagram of the signal output board provided in an embodiment of the present application.

[0039] Figure 6 A schematic diagram of the circuit structure of a first regulating unit provided in an embodiment of the present application.

[0040] Figure 7 A schematic diagram of the circuit structure of a second regulating unit provided in an embodiment of the present application.

[0041] Figure 8A schematic diagram of a configuration method of multiple signal output modules and multiple isolated power supply modules provided in an embodiment of the present application.

[0042] Fig. 9 This is a fifth schematic structural block diagram of the signal output board provided in an embodiment of the present application.

[0043] Fig.10 A schematic diagram of the circuit structure of a power conversion module provided in an embodiment of the present application. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. In addition, it should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0045] See also Figure 1 The embodiment of the present application provides a signal output board 100, including a main controller 110, a bus module 120 and a signal output module 130, and the bus module 120 and the signal output module 130 are respectively connected to the main controller 110.

[0046] The bus module 120 is used to connect the host computer and the main controller 110. The main controller 110 is used to receive the initial signal sent by the host computer through the bus module 120, and send the initial signal to the signal output module 130. The signal output module 130 is used to output multiple target analog signals in different forms according to the initial signal. That is, the input of the signal output module 130 is the initial signal, which is a digital signal, and the output is the target analog signal.

[0047] In the embodiment of the present application, the bus module 120 can be a PXIe bus module, a PXI bus module, or a CPCI bus module, which is used to connect the host computer and the main controller 110, that is, to realize the interaction of data and instructions between the host computer and the main controller 110, and the host computer can be understood as a computer device that can directly issue control instructions, and the main controller 110 can be a field programmable gate array (Field Programmable Gate Array, FPGA). Based on this, it can be understood that in the embodiment of the present application, the control logic of the PXIe bus module can be integrated inside the main controller 110, and the control logic of the PXI bus module can also be integrated, and the control logic of the CPCI bus module can also be integrated. Of course, the bus module 120 can also include at least two of the PXIe bus module, the PXI bus module, and the CPCI bus module at the same time, for example, including the PXIe bus module and the PXI bus module at the same time, then, the control logic of the PXIe bus module and the PXI bus module need to be integrated inside the main controller 110 at the same time, so as to realize the compatibility of the signal output board 100 with the PXIe bus module and the PXI bus module.

[0048] In addition, in the embodiment of the present application, the multiple target analog signals in different forms may include analog signals in a DC form and analog signals in an AC form. The analog signals in a DC form may be analog voltage signals in a DC form or analog current signals in a DC form, and the embodiment of the present application does not impose any specific restrictions on this.

[0049] Since the signal output board 100 provided in the embodiment of the present application can simultaneously output multiple target analog signals in different forms so that the target device can normally enter the test state, the automated testing cost of the target device can be effectively reduced.

[0050] Please combine Figure 2 As an optional implementation, in an embodiment of the present application, the signal output module 130 may include a digital-to-analog converter 131, a first signal output unit 132 and a second signal output unit 133, and the digital-to-analog converter 131 is connected to the main controller 110, the first signal output unit 132 and the second signal output unit 133 respectively.

[0051] Among them, the digital-to-analog converter 131 is used to convert the initial signal into two intermediate analog signals after receiving the initial signal sent by the main controller 110, and send the two intermediate analog signals to the first signal output unit 132 and the second signal output unit 133 respectively. The first signal output unit 132 is used to convert the received intermediate analog signal into an analog signal in DC form, for example, an analog voltage signal in DC form or an analog current signal in DC form, and the second signal output unit 133 is used to convert the received intermediate analog signal into an analog signal in AC form, for example, an analog voltage signal in AC form.

[0052] In the above embodiment, the signal output module 130 can ultimately output an analog signal in the form of DC, and at the same time, can also output an analog signal in the form of AC. During the test operation of the target device, the former can be used as an input stimulus for the target device, or used to provide an enabling stimulus for the target device, and the latter is provided to the target device for signal analysis. Therefore, it can meet the universal testing needs in the field of automated testing, thereby improving the availability of the signal output board 100.

[0053] Please combine Figure 3 In the embodiment of the present application, the digital-to-analog converter 131 may include a DAC8563 digital-to-analog conversion chip U1.

[0054] Taking the DAC8563 digital-to-analog conversion chip U1 as an example, in the digital-to-analog conversion chip U1, the sixth pin, the seventh pin and the eighth pin are respectively connected to the main controller 110, and the eighth pin is also grounded to FGND1 through the first resistor R1. Among them, the sixth pin and the seventh pin are used to receive control instructions related to signal acquisition sent by the main controller 110, that is, Figure 3 The eighth pin is used to receive the initial signal F1_DIN sent by the main controller 110. After receiving the initial signal F1_DIN through the eighth pin, the digital-to-analog conversion chip U1 converts the initial signal F1_DIN into two intermediate analog signals, and sends one of the two intermediate analog signals to the first signal output unit 132 through the first pin, and at the same time, sends the other of the two intermediate analog signals to the second signal output unit 133 through the second pin.

[0055] In the digital-to-analog conversion chip U1, the fourth pin is connected to the reference voltage signal FVREF1+ through the second resistor R2, the tenth pin is also connected to the reference voltage signal FVREF1+, the fifth pin is connected to the first power signal F5V1+ through the third resistor R3, the ninth pin is also connected to the first power signal F5V1+, and is grounded to FGND1 through the first capacitor C1 and the second capacitor C2 connected in parallel, and the third pin is grounded to FGND1.

[0056] Among them, the resistance value of the first resistor R1 can be 100KΩ, the resistance value of the second resistor R2 and the third resistor R3 can be 10KΩ, the capacitance value of the first capacitor can be 0.1UF, the capacitance value of the second capacitor can be 4.7UF, the reference voltage signal FVREF1+ can be within the voltage range of 2.5V to 10V, and can be set according to actual needs. The first power supply signal F5V1+ is a positive voltage signal of 5V.

[0057] In addition, as mentioned above, in the embodiment of the present application, the DC analog signal output by the first signal output unit 132 can actually be a DC analog voltage signal or a DC analog current signal. Therefore, in actual implementation, the output of the DC analog voltage signal and the DC analog current signal can be set to be controllable in combination with the main controller 110, thereby improving the controllability of the signal output board 100. Based on this, Figure 3 As shown, in actual implementation, the first signal output unit 132 may include an output driver U2, the output mode selection end of the output driver U2 is connected to the main controller 110, and the signal input end of the output driver U2 is connected to the digital-to-analog converter 131, specifically connected to the first pin of the digital-to-analog conversion chip U1 in the digital-to-analog converter 131.

[0058] Based on the above description, in the embodiment of the present application, the main controller 110 is also used to receive the mode selection instruction F1_M2 sent by the host computer through the bus module 120, and send the mode selection instruction F1_M2 to the output driver U2, and the mode selection instruction F1_M2 includes a first selection instruction for indicating the output analog voltage signal, and a second selection instruction for indicating the output analog current signal. The digital-to-analog converter 131 is used to convert the initial signal F1_DIN into two intermediate analog signals after receiving the initial signal F1_DIN sent by the main controller 110, and send one of the two intermediate analog signals to the output driver U2. The output driver U2 is used to convert the received intermediate analog signal into an analog voltage signal in a DC form when the mode selection instruction is the first selection instruction, and to convert the received intermediate analog signal into an analog current signal in a DC form when the mode selection instruction is the second selection instruction.

[0059] like Figure 3 As shown, in the embodiment of the present application, the output driver U2 can be an XTR300 output driver chip.

[0060] Taking the output driver U2 as the XTR300 output driver chip as an example, in the output driver U2, the first pin and the second pin will be used together as the output mode selection terminal. If the first pin input is low level and the second pin input is low level, it indicates that the received mode selection instruction F1_M2 is the first selection instruction for indicating the output of the analog voltage signal in the form of DC. If the first pin input is high level and the second pin input is low level, it indicates that the received mode selection instruction F1_M2 is the second selection instruction for indicating the output of the analog current signal in the form of DC. Based on this, Figure 3 As shown, in actual implementation, of the first pin and the second pin of the output driver U2, only the first pin can be connected to the main controller 110 to receive the mode selection instruction F1_M2 sent by the main controller 110. At the same time, the first pin is grounded to FGND1 through the fourth resistor R4, and the second pin is grounded to FGND1 through the fifth resistor R5. At this time, the mode selection instruction F1_M2 is equivalent to considering only the level signal received by the first pin.

[0061] In addition, in the output driver U2, the third pin is connected to the digital-to-analog converter 131 through the sixth resistor R6 to receive an intermediate analog signal sent by the digital-to-analog converter 131, that is, an intermediate analog signal sent by the first pin of the digital-to-analog conversion chip U1, the fourth pin is connected to the reference voltage signal FVREF1+ through the seventh resistor R7, the fifth pin is grounded to FGND1 through the eighth resistor R8, the sixth pin is grounded to FGND1 through the ninth resistor R9, the seventh pin is grounded to FGND1 through the tenth resistor R10, the ninth pin is connected to the tenth pin through the eleventh resistor R11, the eleventh pin is connected to the second power supply signal F5V1-, and is grounded to FGND1 through the third capacitor C3, and the thirteenth pin is used as an analog signal output terminal for outputting a DC analog signal DA1, that is, a DC analog voltage signal, or a DC analog current signal. Peripheral circuit of the thirteenth pin:

[0062] The thirteenth pin is connected to the eighth pin through the twelfth resistor R12 and the thirteenth resistor R13 connected in series, and the fourth capacitor C4 is connected between the eighth pin and the seventh pin. In addition, the cathode of the first diode D1 and the anode of the second diode D2 are respectively connected between the twelfth resistor R12 and the thirteenth resistor R13, the anode of the first diode D1 is connected to the third power supply signal F15V1-, and the anode of the second diode D2 is connected to the fourth power supply signal F15V1+. Here, the first diode D1 and the second diode D2 form a clamping diode at the output position of the analog signal DA1. At the same time, the thirteenth pin is also connected to the fourth pin through the fifth capacitor C5.

[0063] In the output driver U2, the fifteenth pin is connected to the fourth power signal F15V1+ and is grounded to FGND1 through the sixth capacitor C6. The sixteenth pin is grounded to FGND1, the seventeenth pin, the eighteenth pin and the nineteenth pin are used to output the error identification signal F1_EF, the twentieth pin is connected to the first power signal F5V1+ through the fourteenth resistor R14, and the twenty-first pin is connected to the third power signal F15V1-.

[0064] Among them, the resistance value of the fourth resistor R4 can be 100KΩ, the resistance value of the fifth resistor R5 can be 5.1KΩ, the resistance value of the sixth resistor R6 and the seventh resistor R7 can be 1.02KΩ, the resistance value of the eighth resistor R8 and the ninth resistor R9 can be 750Ω, the resistance value of the tenth resistor R10 can be 5.1KΩ, the resistance value of the eleventh resistor R11 can be 8.25KΩ, the resistance value of the twelfth resistor R12 can be 15Ω, the resistance value of the thirteenth resistor R13 can be 5.1KΩ, the resistance value of the fourteenth resistor R14 can be 100KΩ, and the resistance value of the third capacitor C3 can be 150KΩ. The capacitance can be 0.1UF, the capacitance of the fourth capacitor C4 can be 10NF, the capacitance of the fifth capacitor C5 can be 0.047UF, the capacitance of the sixth capacitor C6 can be 0.1UF, the reference voltage signal FVREF1+ can be within the voltage range of 2.5V to 10V, and can be specifically set according to actual needs. The first power supply signal F5V1+ is a positive voltage signal of 5V, the second power supply signal is a negative voltage signal of 5V, the third power supply signal F15V1- is a negative voltage signal of 15V, and the fourth power supply signal F15V1+ is a positive voltage signal of 15V.

[0065] Furthermore, in an embodiment of the present application, the second signal output unit 133 may include an operational amplifier U3, the positive input terminal of the operational amplifier U3 is connected to the digital-to-analog converter 131, specifically connected to the second pin of the digital-to-analog conversion chip U1 in the digital-to-analog converter 131, and the reverse input terminal of the operational amplifier U3 is connected to the reference voltage signal FVREF1+.

[0066] Based on the above description, in an embodiment of the present application, the digital-to-analog converter 131 is used to convert the initial signal F1_DIN into two intermediate analog signals after receiving the initial signal F1_DIN sent by the main controller 110, and send one of the two intermediate analog signals to the operational amplifier U3, and the operational amplifier U3 is used to convert the received intermediate analog signal into an analog voltage signal in AC form.

[0067] Exemplarily, in the operational amplifier U3, the third pin is used as a positive input terminal, and is connected to the second pin of the digital-to-analog conversion chip U1 in the digital-to-analog converter 131 through the fifteenth resistor R15 to receive another intermediate analog signal sent by the digital-to-analog converter 131. At the same time, the third pin is also connected to the ground through the sixteenth resistor R16, the seventeenth resistor R17, the eighteenth resistor R18 and the nineteenth resistor R19 connected in series. The second pin is used as a negative input terminal, and is connected to the reference voltage signal FVREF1+ through the twentieth resistor R20. The seventh pin is used as a positive power supply terminal, and is connected to the fourth power supply signal F15V1+, and is grounded to FGND1 through the seventh capacitor C7. The fourth pin is used as a negative power supply terminal, and is connected to the third power supply signal F15V1-, and is grounded to FGND1 through the eighth capacitor C8. The sixth pin is used as an analog signal output terminal, which is used to output an analog voltage signal DA2 in an alternating current form, that is, an analog voltage signal in an alternating current form. Peripheral circuit of the sixth pin:

[0068] The sixth pin is connected to the second pin through a ninth capacitor C9 and a resistor network in parallel, wherein the resistor network includes a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23 and a twenty-fourth resistor R24 ​​connected in series. In addition, the sixth pin is respectively connected to the cathode of the third diode D3 and the anode of the fourth diode D4, the anode of the third diode D3 is connected to the third power supply signal F15V1-, the anode of the fourth diode D4 is connected to the fourth power supply signal F15V1+, and the third diode D3 and the fourth diode D4 form a clamping diode at the output position of the analog voltage signal DA2.

[0069] Among them, the resistance value of the fifteenth resistor R15 can be 10KΩ, the resistance value of the sixteenth resistor R16, the seventeenth resistor R17, the eighteenth resistor R18, the nineteenth resistor R19, the twentieth resistor R20, the twenty-first resistor R21, the twenty-second resistor R22, the twenty-third resistor R23 and the twenty-third resistor R23 can be 10KΩ, the capacitance value of the seventh capacitor C7 and the eighth capacitor C8 can be 0.1UF, and the capacitance value of the ninth capacitor C9 can be 33PF.

[0070] The following will be combined Figure 3 The circuit structure shown in FIG. 1 calculates and derives the process in which the second signal output unit 133 outputs the analog voltage signal DA2.

[0071] V out : Analog voltage signal DA2

[0072] DAC Vout : The intermediate analog signal output by the second pin of the digital-to-analog conversion chip U1

[0073] V ref : Reference voltage signal FVREF1+

[0074] According to the short-circuit and break-interrupt schematic diagram of operational amplifier U3, it can be deduced that:

[0075] V out =4*DAC Vout -V ref

[0076] Assume that V ref is 2.5V, the above formula can be simplified to:

[0077] V out =4*DAC Vout -10

[0078] DAC Vout The calculation formula is:

[0079] DAC Vout =(D in / 2 n )*V ref *Gain

[0080] Among them, V ref is 2.5V, Gain is set to a constant value of 2, D in The digital code output by the main controller 110 is thus Vout can be simplified to:

[0081] DAC Vout =(D in / 2 n )*5

[0082] Finally, V out The calculation formula is:

[0083] V out =20*(D in / 2 n )-10

[0084] Please combine Figure 4 In the embodiment of the present application, the signal output module 130 may be provided in plurality, for example, 8 or 16. Based on this, in the embodiment of the present application, the signal output board 100 may also include a plurality of isolated power supply modules 140, and the plurality of isolated power supply modules 140 are connected to the plurality of signal output modules 130 in a one-to-one correspondence.

[0085] The isolated power supply module 140 is used to provide working power to the corresponding signal output module 130 .

[0086] For each of the multiple isolated power supply modules 140, the isolated power supply module 140 is only used to provide working power for the corresponding signal output module 130. Therefore, the mutual interference caused by the shared power supply can be avoided. Then, the process of the signal output module 130 outputting the target analog signal according to the initial signal can ensure the independence of signal transmission, thereby ensuring the accuracy of the target analog signal.

[0087] Please combine Figure 5 In an embodiment of the present application, the isolated power supply module 140 may include a first adjustment unit 141 and a second adjustment unit 142 , the first adjustment unit 141 and the second adjustment unit 142 are respectively connected to the corresponding signal output module 130 , and the second adjustment unit 142 is also connected to the first adjustment unit 141 .

[0088] The first adjustment unit 141 is used to connect to the backplane of the bus module 120 to adjust the initial power signal provided by the backplane to obtain a first target power signal, and the first target power signal is used to connect to the second adjustment unit 142, and is used to provide part of the working power for the corresponding signal output module 130. The second adjustment unit 142 is used to adjust the first target power signal to obtain a second target power signal, and the second target power signal is used to provide another part of the working power for the corresponding signal output module 130.

[0089] Please combine Figure 6 In the embodiment of the present application, the first regulating unit 141 may include a WRA_S-3WR voltage regulating chip, which is defined as a first voltage regulating chip U4.

[0090] In the first voltage regulating chip U4, the second pin is connected to the backplane of the bus module 120 to access the initial power signal VCC provided by the backplane, and is grounded through the tenth capacitor C10, the first pin is grounded, the sixth pin is used as a positive voltage signal output terminal, for outputting a first target power signal, specifically the fourth power signal F15V1+, and is grounded FGND1 through the eleventh capacitor C11 and the twelfth capacitor C12 connected in parallel, the eighth pin is used as a negative voltage signal output terminal, for outputting another first target power signal, specifically the third power signal F15V1-, and is grounded FGND1 through the thirteenth capacitor C13 and the fourteenth capacitor C14 connected in parallel, and the seventh pin is grounded FGND1.

[0091] Among them, the capacitance of the tenth capacitor C10, the eleventh capacitor C11 and the thirteenth capacitor C13 is 0.1UF, the capacitance of the twelfth capacitor C12 and the fourteenth capacitor is 10UF, the initial power signal VCC is a 5V voltage signal, the third power signal F15V1- is a negative voltage signal of 15V, and the fourth power signal F15V1+ is a positive voltage signal of 15V.

[0092] In addition, the signal output module 130 has Figure 3 In the case of the circuit structure shown, the third power supply signal F15V1- is used to provide part of the working power for the first signal output unit 132 and the second signal output unit 133 included in the signal output module 130, and the fourth power supply signal F15V1+ is also used to provide part of the working power for the first signal output unit 132 and the second signal output unit 133 included in the signal output module 130.

[0093] Furthermore, please combine Figure 7 In the embodiment of the present application, the second regulating unit 142 may include a CW78M05 voltage regulating chip, which is defined as a second voltage regulating chip U5.

[0094] In the second voltage regulating chip U5, the first pin is connected to the first regulating unit 141 to access a first target power signal. For example, the first regulating unit 141 has Figure 6 In the case of the circuit structure shown, the first pin is connected to the sixth pin of the first voltage regulating chip U4 to access the fourth power signal F15V1+, and at the same time, is connected to the ground FGND1 through the fifteenth capacitor C15 and the sixteenth capacitor C16 connected in parallel. In addition, in the second voltage regulating chip U5, the second pin is connected to the ground FGND1, and the third pin is used as a positive voltage signal output terminal for outputting the second target power signal, that is, the first power signal F5V1+, and the third pin is connected to the ground FGND1 through the seventeenth capacitor C17 and the polarity capacitor C18 connected in parallel, and the positive electrode of the polarity capacitor C18 is connected to the third pin, and the negative electrode is connected to the ground FGND1.

[0095] Among them, the capacitance of the fifteenth capacitor C15 is 22UF, the capacitance of the sixteenth capacitor C16 is 0.1UF, the capacitance of the seventeenth capacitor is 0.1UF, the capacitance of the polarity capacitor C18 is 10UF, and the first power signal F5V1+ is a positive voltage signal of 5V.

[0096] The signal output module 130 has Figure 3 In the case of the circuit structure shown, the first power signal F5V1+ is 5V and is used to provide part of the working power for the first signal output unit 132 and the second signal output unit 133 included in the signal output module 130 .

[0097] Furthermore, in the embodiment of the present application, the signal output board 100 may include a circuit substrate 150 .

[0098] See also Figure 8 , a plurality of signal output modules 130 are arranged on the circuit substrate 150 in an array manner, and the plurality of isolation power modules 140 correspond to the arrangement positions of the plurality of signal output modules 130 one by one.

[0099] In the above embodiment, multiple signal output modules 130 and multiple isolated power supply modules 140 are rationally arranged on the circuit substrate 150, which can enhance the compactness of the signal output board 100, thereby reducing the size of the signal output board 100. Ultimately, the size of the signal output board 100 can be reduced to 160mm*100mm.

[0100] See also Fig. 9 In an embodiment of the present application, the signal output board 100 also includes a power conversion module 160, which is connected to the main controller 110, and the power conversion module 160 is used to connect to the backplane of the bus module 120 to adjust the initial power signal provided by the backplane to obtain a third target power signal, and the third target power signal is used to provide part of the working power for the main controller 110.

[0101] Exemplarily, the power conversion module 160 may include a third voltage regulator chip U6, and the third voltage regulator chip U6 may be a LTM4644 voltage regulator chip, specifically, Fig.10 The third voltage regulating chip U6 is used to regulate the initial power signal provided by the backplane to obtain a third target power signal +1V0 and another third target power signal +1V8, which are used to provide part of the working power for the main controller 110.

[0102] The third target power signal +1V0 is a 1V voltage signal, and the third target power signal +1V8 is a 1.8V voltage signal. Fig.10 In the figure, the capacitance of the nineteenth capacitor C19, the twentieth capacitor C20, the twenty-first capacitor C21 and the twenty-second capacitor C22 can be 10UF, the capacitance of the twenty-third capacitor C23 and the twenty-fourth capacitor C24 can be 0.1UF, the capacitance of the twenty-fifth capacitor C25 and the twenty-sixth capacitor C26 can be 10PF, the resistance of the twenty-fifth resistor R25 can be 54Ω, the resistance of the twenty-sixth resistor R26 and the twenty-eighth resistor R28 can be 30.1KΩ, and the resistance of the twenty-seventh resistor R27 and the twenty-ninth resistor R29 can be 100KΩ.

[0103] The embodiment of the present application further provides an automated testing system, including a host computer and the aforementioned signal output board 100 , wherein the bus module 120 in the signal output board 100 is connected to the host computer.

[0104] The host computer is used to generate an initial signal and send the initial signal to the main controller 110 through the bus module 120 .

[0105] The signal output board 100 provided in the embodiment of the present application includes a main controller 110, a bus module 120 and a signal output module 130, and the bus module 120 and the signal output module 130 are respectively connected to the main controller 110. Among them, the bus module 120 is used to connect the host computer and the main controller 110, and the main controller 110 is used to receive the initial signal sent by the host computer through the bus module 120, and send the initial signal to the signal output module 130, and the signal output module 130 is used to output multiple target analog signals in different forms according to the initial signal. That is, the signal output board 100 provided in the embodiment of the present application can simultaneously output multiple target analog signals in different forms, so that the target device can normally enter the test state, therefore, the automated test cost of the target device can be effectively reduced.

[0106] The automated testing system provided in the embodiment of the present application has the same beneficial effects as the above-mentioned signal output board 100, which will not be described in detail here.

[0107] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connection" and "setting" should be understood in a broad sense. For example, it can be a mechanical fixed connection, a detachable connection or an integral connection, and it can be an electrical connection or a communication connection, wherein the communication connection can be a wired communication connection or a wireless communication connection. In addition, it can be a direct connection, an indirect connection through an intermediate medium, or a connection between two elements. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0108] The above description is only a partial embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A signal output board, characterized in that: It includes a main controller, a bus module and a signal output module, wherein the bus module and the signal output module are respectively connected to the main controller; The bus module is used to connect the host computer and the main controller; The main controller is used to receive the initial signal sent by the host computer through the bus module, and send the initial signal to the signal output module; The signal output module is used to output multiple target analog signals in different forms according to the initial signal. The signal output module includes a digital-to-analog converter, a first signal output unit and a second signal output unit. The digital-to-analog converter is connected to the main controller, the first signal output unit and the second signal output unit respectively. The digital-to-analog converter includes a first pin to a tenth pin; wherein: The sixth pin, the seventh pin and the eighth pin are respectively connected to the main controller, the eighth pin is also grounded through a first resistor, the sixth pin and the seventh pin are used to receive a mode selection instruction sent by the main controller, and the eighth pin is used to receive an initial signal sent by the main controller; The digital-to-analog converter is further used to, after receiving the initial signal, convert the initial signal into two intermediate analog signals, and send them to the first signal output unit and the second signal output unit through the first pin and the second pin respectively; The fourth pin is connected to the reference voltage signal through the second resistor, the tenth pin is also connected to the reference voltage signal, the fifth pin is connected to the first power signal through the third resistor, the ninth pin is also connected to the first power signal, and the ninth pin is grounded through the first capacitor and the second capacitor in parallel, and the third pin is grounded.

2. The signal output board according to claim 1, characterized in that: The first signal output unit is used to convert the received intermediate analog signal into an analog signal in a DC form; The second signal output unit is used to convert the received intermediate analog signal into an analog signal in an alternating current form.

3. The signal output board according to claim 2, characterized in that: The first signal output unit comprises an output driver, an output mode selection terminal of the output driver is connected to the main controller, and a signal input terminal of the output driver is connected to the digital-to-analog converter; The main controller is also used to receive a mode selection instruction sent by the host computer through the bus module, and send the mode selection instruction to the output driver, wherein the mode selection instruction includes a first selection instruction for indicating an output analog voltage signal, and a second selection instruction for indicating an output analog current signal; The digital-to-analog converter is used for, after receiving the initial signal sent by the main controller, converting the initial signal into two intermediate analog signals, and sending one of the two intermediate analog signals to the output driver; The output driver is used to convert the received intermediate analog signal into an analog voltage signal in a DC form when the mode selection instruction is a first selection instruction, and is used to convert the received intermediate analog signal into an analog current signal in a DC form when the mode selection instruction is a second selection instruction.

4. The signal output board according to claim 3, characterized in that: The first pin of the output driver is connected to the main controller; The first pin of the output driver is grounded through a fourth resistor, and the second pin of the output driver is grounded through a fifth resistor.

5. The signal output board according to claim 3, characterized in that: The first pin and the second pin of the output driver are connected to the main controller.

6. The signal output board according to claim 4 or 5, characterized in that: Also includes: The third pin of the output driver is connected to the digital-to-analog converter via a sixth resistor to receive an intermediate analog signal sent by the first pin of the digital-to-analog converter; The fourth pin of the output driver is connected to the reference voltage signal through the seventh resistor, the fifth pin is grounded through the eighth resistor, the sixth pin is grounded through the ninth resistor, the seventh pin is grounded through the tenth resistor, the ninth pin is connected to the tenth pin through the eleventh resistor, the eleventh pin is connected to the second power supply signal, and the eleventh pin of the output driver is grounded through the third capacitor; The thirteenth pin of the output driver is used as an analog signal output terminal for outputting an analog signal in a DC form; The fifteenth pin of the output driver is connected to the fourth power supply signal and is grounded through the sixth capacitor and the sixteenth pin is grounded; The seventeenth pin, the eighteenth pin and the nineteenth pin of the output driver are used to output an error identification signal; The 20th pin of the output driver is connected to the first power signal through the 14th resistor, and the 21st pin is connected to the third power signal.

7. The signal output board according to claim 6, characterized in that: Also includes: The thirteenth pin of the output driver is connected to the eighth pin through the twelfth resistor and the thirteenth resistor connected in series, the fourth capacitor is connected between the eighth pin and the seventh pin, the thirteenth pin of the output driver is also connected to the fourth pin through the fifth capacitor, and the cathode of the first diode and the anode of the second diode are respectively connected between the twelfth resistor and the thirteenth resistor; wherein the anode of the first diode is connected to the third power supply signal, and the anode of the second diode is connected to the fourth power supply signal.

8. The signal output board according to claim 2, characterized in that: The second signal output unit comprises an operational amplifier, a positive input terminal of the operational amplifier is connected to the digital-to-analog converter, and a negative input terminal of the operational amplifier is connected to a reference voltage signal; The digital-to-analog converter is used for, after receiving the initial signal sent by the main controller, converting the initial signal into two intermediate analog signals, and sending one of the two intermediate analog signals to the operational amplifier; The operational amplifier is used to convert the received intermediate analog signal into an analog voltage signal in an alternating current form.

9. The signal output board according to claim 8, characterized in that: The positive input terminal of the operational amplifier is connected to the second pin of the digital-to-analog converter, and the negative input terminal of the operational amplifier is connected to a reference voltage signal.

10. The signal output board according to claim 9, characterized in that: Also includes: The third pin of the operational amplifier is used as a positive input terminal and is connected to the second pin of the digital-to-analog converter through a fifteenth resistor to receive another intermediate analog signal sent by the digital-to-analog converter. The third pin of the operational amplifier is also grounded through a sixteenth resistor, a seventeenth resistor, an eighteenth resistor and a nineteenth resistor connected in series; The second pin of the operational amplifier is used as a negative input terminal and is connected to a reference voltage signal through a twentieth resistor; The seventh pin of the operational amplifier is used as a positive power supply terminal, connected to the fourth power supply signal and grounded through the seventh capacitor; The fourth pin of the operational amplifier is used as a negative power supply terminal, connected to the third power supply signal and grounded through the eighth capacitor; The sixth pin of the operational amplifier is used as an analog signal output terminal for outputting an analog signal in an alternating current form.

11. The signal output board according to claim 10, characterized in that: Also includes: The sixth pin of the operational amplifier is connected to the second pin through a ninth capacitor and a resistor network connected in parallel, wherein the resistor network includes a twenty-first resistor, a twenty-second resistor, a twenty-third resistor and a twenty-fourth resistor connected in series; The sixth pin of the operational amplifier is respectively connected to the cathode of the third diode and the anode of the fourth diode. The anode of the third diode is connected to the third power supply signal, and the anode of the fourth diode is connected to the fourth power supply signal.

12. The signal output board according to claim 1, characterized in that: The signal output module is provided in plurality, and the signal output board card further comprises a plurality of isolation power supply modules, and the plurality of isolation power supply modules are connected to the plurality of signal output modules in a one-to-one correspondence; The isolated power supply module is used to provide working power for the corresponding signal output module.

13. The signal output board according to claim 12, characterized in that: The isolated power supply module includes a first regulating unit and a second regulating unit, the first regulating unit and the second regulating unit are respectively connected to corresponding signal output modules, and the second regulating unit is also connected to the first regulating unit; The first regulating unit is used to connect to the backplane of the bus module to regulate the initial power signal provided by the backplane to obtain a first target power signal, and the first target power signal is used to access the second regulating unit and to provide part of the working power for the corresponding signal output module; The second regulating unit is used to regulate the first target power signal to obtain a second target power signal, and the second target power signal is used to provide another part of working power for the corresponding signal output module.

14. The signal output board according to claim 12, characterized in that: The signal output board includes a circuit substrate; The plurality of signal output modules are arranged on the circuit substrate in an array manner, and the plurality of isolation power modules correspond to the arrangement positions of the plurality of signal output modules in a one-to-one manner.

15. The signal output board according to claim 1, characterized in that: The signal output board also includes a power conversion module, and the power conversion module is connected to the main controller; The power conversion module is used to connect to the backplane of the bus module to adjust the initial power signal provided by the backplane to obtain a third target power signal, and the third target power signal is used to provide part of the working power for the main controller.

16. The signal output board according to claim 1, characterized in that: The bus module includes a PXIe bus module and a PXI bus module, and the control logic of the PXIe bus module and the PXI bus module are integrated in the main controller.

17. An automated testing system, characterized in that: It comprises a host computer and a signal output card according to any one of claims 1 to 16, wherein the bus module in the signal output card is connected to the host computer; The host computer is used to generate an initial signal and send the initial signal to the main controller through the bus module.

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