CN203117380U - Testing device of printed circuit board assembly (PCBA) of medical instrument - Google Patents
Testing device of printed circuit board assembly (PCBA) of medical instrument Download PDFInfo
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- CN203117380U CN203117380U CN 201320096301 CN201320096301U CN203117380U CN 203117380 U CN203117380 U CN 203117380U CN 201320096301 CN201320096301 CN 201320096301 CN 201320096301 U CN201320096301 U CN 201320096301U CN 203117380 U CN203117380 U CN 203117380U
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Abstract
The utility model belongs to the field of automated testing and provides a testing device of a printed circuit board assembly (PCBA) of a medical instrument. The testing device of the PCBA of the medical instrument comprises a testing clamp, a testing center console, a data acquisition card and an upper computer, wherein the testing clamp is connected with the PCBA to be tested and used for feeding back testing signals, the testing central console is used for providing an excitation source for the testing clamp according to a control signal, controlling the testing clamp to switch testing points and preprocessing the testing signals, the data acquisition card is used for outputting the control signal to the testing central console and uploading the testing signals, and the upper computer is used for sending the control signal and receiving and analyzing the testing signals and then outputting testing results. According to the testing device of the PCBA of the medical instrument, the testing clamp is connected with each testing point of the PCBA to be tested and feeds back the testing signals to the upper computer and then the testing results are displayed and output by the upper computer, a plurality of testing points can be covered at one time, a testing process that all the testing results are output automatically is achieved, and testing requirements of a system are met.
Description
Technical field
The utility model belongs to the automated test device field, relates in particular to the proving installation of a kind of Medical Devices PCBA.
Background technology
Traditional PCBA(Printed Circuit Board Assembly, printed circuit-board assembly) device for testing functions and method mainly are to utilize testing tool (multimeter, signal generator, oscillograph etc.) commonly used to carry out, this test mode has certain dirigibility, but need be in testing process artificial degree of participation height, thereby intelligent degree is low, testing reliability is not high, and the inefficiency of test is not suitable for the needs of quick production test.Under the support by multi-purpose computer and data necessary acquisition hardware, come the function of real original traditional test instrument by software.Legacy test system maintenance data capture card carries out logic control, input and output voltage control to whole signal acquisition process.Have control port few but data acquisition is stuck in the utilization process, a little less than the output carrying load ability, problem such as control mode is single as a test macro, causes following problem: the first, can test that to cover point few, and can not satisfy the test request as a system; The second, means of testing is single, and test surfaces is narrow, can not export as electric current and voltage, simultaneously electric current and voltage is tested.
The utility model content
The purpose of the utility model embodiment is to provide the proving installation of a kind of Medical Devices PCBA, is intended to solve traditional PCBA proving installation and can tests the covering point less, and means are single, can not satisfy the problem as the test request of a system.
The utility model embodiment is achieved in that the proving installation of a kind of Medical Devices PCBA, comprising:
Link to each other the test fixture of feedback test signal with each test point of PCBA to be measured;
Be connected with described test fixture, driving source be provided, control described test fixture switch test point and described test signal is carried out pretreated test console for described test fixture according to control signal;
Be connected the data collecting card that described control signal is exported to described test console and test signal is uploaded with described test console by shielded cable; And
Be connected by draw-in groove with described data collecting card, send described control signal and reception and analyze the host computer that outputs test result after the described test signal.
Further, described test console comprises:
Be connected with the I/O mouth of described data collecting card, be used for the I/O mouth expansion module of expansion I/O mouth;
A plurality of be connected described I/O mouth expansion module and described test fixture be connected between, control the relay of described test fixture switch test point;
Be connected with the simulation delivery outlet of described data collecting card, regulate the electric current and voltage stimulating module of driving source size; And
Be connected with the analog input mouth of described data collecting card, test signal be converted to the data processing module of the Validity Test scope of described data collecting card.
Further, described I/O mouth expansion module is code translator.
Further, described electric current and voltage stimulating module comprises the first two-way relay, constant voltage circuit and the constant-current circuit that coil is connected with the I/O mouth of described data collecting card, and the described first two-way relay selects the constant voltage driving source of constant voltage circuit or the constant current drive source of constant-current circuit to output to described test fixture.
Further, described data processing module comprises the second two-way relay, first relay and first amplifier, wherein,
First normally closed contact of the described second two-way relay through a resistance R 1 be connected with described test fixture, first normally opened contact is unsettled, second normally opened contact of the described second two-way relay is connected with described test fixture and unsettled through a resistance R 3 ground connection, second normally closed contact through a resistance R 2;
The normal phase input end of described first amplifier is connected with two moving contacts of the described second two-way relay, the inverting input of described first amplifier is connected with its output terminal through a resistance R 4, and be connected with the moving contact of described first relay, the normally closed contact of described first relay is unsettled, normally opened contact is through a resistance R 5 ground connection, and the output terminal of described first amplifier is connected with the analog input mouth of described data acquisition as the output terminal of described data processing module.
Further, described constant voltage circuit comprises second amplifier, the 3rd amplifier, the 3rd two-way relay, N-type metal-oxide-semiconductor and P type metal-oxide-semiconductor, wherein,
The normal phase input end of described second amplifier is connected with its inverting input through a resistance R 7 through a resistance R 6 is connected described second amplifier with the simulation delivery outlet of described data collecting card output terminal, and described output terminal also is connected with described test fixture through resistance R 8, resistance R 9 and the resistance R 10 that is connected in series;
First normally closed contact of the 3rd two-way relay through a resistance R 11 be connected with described test fixture, first normally opened contact is unsettled, second normally opened contact of the 3rd two-way relay is connected with described test fixture and through a resistance R 12 ground connection, second normally closed contact of the 3rd two-way relay is unsettled through a resistance R 12;
The normal phase input end of described the 3rd amplifier is connected with two moving contacts of described the 3rd two-way relay, inverting input is connected with its output terminal through a resistance R 14, the output terminal of described the 3rd amplifier also is connected with first normally closed contact of the described first two-way relay, and two moving contacts of the described first two-way relay are connected with the inverting input of described second amplifier;
The grid of described N-type metal-oxide-semiconductor and P type metal-oxide-semiconductor all is connected with the end of described resistance R 9 near described second amplifier, the source electrode of described N-type metal-oxide-semiconductor and P type metal-oxide-semiconductor all is connected with the other end of described R9, the drain electrode of described N-type metal-oxide-semiconductor is connected with a positive direct-current power supply, and the drain electrode of described P type metal-oxide-semiconductor is connected with a negative direct supply.
Further, described constant-current circuit comprises four high guaily unit, the 5th amplifier and the 6th amplifier, wherein,
The normal phase input end of described four high guaily unit is connected with an end of described resistance R 10 close described test fixtures, inverting input is connected with its output terminal through a resistance R 15, and the inverting input of described four high guaily unit also is connected with the inverting input of described the 5th amplifier through a resistance R 16;
The inverting input of described the 5th amplifier through a resistance R 17 be connected with its output terminal, normal phase input end is connected with the end of described resistance R 10 away from described test fixture, the output terminal of described four high guaily unit is connected with the normal phase input end of described the 6th amplifier through a resistance R 18;
The normal phase input end of described the 6th amplifier is connected with the output terminal of described four high guaily unit through a resistance R 20 through a resistance R 19 ground connection, inverting input, the inverting input of described the 6th amplifier also is connected with its output terminal through a resistance R 21, and the output terminal of described the 6th amplifier is connected with second normally opened contact of the described first two-way relay as the output terminal of described constant-current circuit.
Further, described data collecting card is the pci bus capture card.
Further, described code translator is the 6-64 code translator.
Further, described test fixture is equipped with test interface and probe.
The proving installation test clamp of above-mentioned Medical Devices PCBA links to each other with each test point of PCBA to be measured, transmit control signal control data collecting card and test console of host computer sends driving source to test fixture PCBA to be measured tested, thereafter test fixture shows the feedback test signal and outputs test result to host computer, having realized can a plurality of test point of disposable covering, and realize that robotization exports the automatic test course of whole test results, satisfied the test request as a system.
Description of drawings
Fig. 1 is the structured flowchart of the proving installation of the Medical Devices PCBA that provides of the utility model embodiment;
Fig. 2 is the circuit theory diagrams of the data processing module that provides of the utility model embodiment;
Fig. 3 is the circuit theory diagrams of the electric current and voltage stimulating module that provides of the utility model embodiment.
Embodiment
In order to make the technical problems to be solved in the utility model, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
As shown in Figure 1, be the structured flowchart of proving installation of the Medical Devices PCBA of a preferred embodiment, the proving installation of Medical Devices PCBA comprises host computer 100, data collecting card 200, shielded cable (figure is mark), test console 300 and test fixture 400.
The proving installation test clamp 400 of above-mentioned Medical Devices PCBA links to each other with each test point of PCBA500 to be measured, transmit control signal control data collecting card 200 and test console 300 of host computer 100 sends driving source and tests to 400 couples of PCBA500 to be measured of test fixture, thereafter test fixture 400 shows the feedback test signal and outputs test result to host computer 100, having realized can a plurality of test point of disposable covering, and realize that robotization exports the automatic test course of whole test results, satisfied the test request as a system.
In a preferred embodiment, described test console 300 comprises I/O mouth expansion module 310, a plurality of relay 320, electric current and voltage stimulating module 330 and data processing module 340.
I/O mouth expansion module 310 is connected with the I/O mouth of described data collecting card 200, be used for the expansion I/O mouth, preferably, I/O mouth expansion module 310 is code translator, can use ALTERA(A Ertela) the FPGA(Field Programmable Gata Array of company, field programmable gate array) chip---EP2C5T144 constitutes the 6-64 code translator, and 6 I/O mouths on the data collecting card 200 are extended to 64.
This each relay 320 between being connected to described I/O mouth expansion module 310 and described test fixture 400 being connected, is controlled described test fixture 400 switch test points.Logic function setting according to the 6-64 code translator, 6 road I/O signals on the data collecting card 200 are controlled the break-make of No. 64 relays 320 by the varying level in the transmission 000000-111111 scope, as No. 1 relay 320 of 000001 gating, No. 2 relays 320 of 000002 gating, also reserve 3 group of 6 road I/O mouth in addition, can insert identical fpga chip and carry out the port expansion according to different PCBA.
Electric current and voltage stimulating module 330 is connected with the simulation delivery outlet of described data collecting card 200, and adjusting driving source size to satisfy the demand of a test macro.
With reference to figure 2, in a preferred embodiment, described data processing module 340 comprises the second two-way relay K 1, first relay K 2 and the first amplifier U1.
First normally closed contact of the described second two-way relay 320 through a resistance R 1 be connected with described test fixture 400, first normally opened contact of the second two-way relay 320 is unsettled, second normally opened contact of the described second two-way relay 320 is connected with described test fixture 400 and unsettled through a resistance R 3 ground connection, the second two-way relay, 320 second normally closed contacts through a resistance R 2.
The normal phase input end of the described first amplifier U1 is connected with two moving contacts of the described second two-way relay 320, the inverting input of the described first amplifier U1 is connected with its output terminal through a resistance R 4, and be connected with the moving contact of described first relay 320, the normally opened contact of unsettled, described first relay 320 of the normally closed contact of described first relay 320 is through a resistance R 5 ground connection, and the output terminal of the described first amplifier U1 is connected with the analog input mouth of described data acquisition as the output terminal of described data processing module 340.
Control the input data and amplify minification by controlling the second two-way relay K 1, first relay K 2 in the data processing module 340.When the second two-way relay K 1, first relay K 2 are not opened, then test fixture 400 inputs obtain voltage and first amplifier U1 formation follow circuit, and enlargement factor is 1; When 1 unlatching of the second two-way relay K, when first relay K 2 is closed, the voltage ratio of test fixture 400 inputs dwindles, and scale down is R3/ (R2+R3); Open when first relay K 2, when the second two-way relay K 1 was closed, the voltage ratio of test fixture 400 inputs amplified, and magnification ratio is (R4+R5)/R5.As test fixture 400 input 50V, select to open the second two-way relay K 1, dwindle 20 times and become 2.5V, again this voltage is inputed to the analog input port of data collecting card 200, read by host computer 100 again, analyze.
With reference to figure 3, in a preferred embodiment, described electric current and voltage stimulating module 330 comprises the first two-way relay 332, constant voltage circuit 334 and the constant-current circuit 336 that coil is connected with the I/O mouth of described data collecting card 200, and the described first two-way relay 332 selects the constant voltage driving source of constant voltage circuit 334 or the constant current drive source of constant-current circuit 336 to output to described test fixture 400.So, in actual conditions, can select to export test fixture 400 to encourage the test point of PCBA500 to be measured with the constant voltage driving source of constant voltage circuit 334 or the constant current drive source of constant-current circuit 336 by electric current and voltage stimulating module 330, carry out Validity Test.Electric current and voltage stimulating module 330 can provide voltage drive and/or current excitation to output to test fixture 400, simultaneously voltage and/or the electric current of each test point of PCBA500 to be measured is tested.
In a preferred embodiment, described constant voltage circuit 334 comprises the second amplifier U2, the 3rd amplifier U3, the 3rd two-way relay K 3, N-type metal-oxide-semiconductor Q1 and P type metal-oxide-semiconductor Q2.
Namely in above-mentioned electric current and voltage stimulating module 330, first normally closed contact of the described first two-way relay 332 is connected with the output terminal of described constant voltage circuit 334, first normally opened contact of the first two-way relay 332 is unsettled, second normally opened contact of the described first two-way relay 332 is connected with the output terminal of described constant-current circuit 336, second normally closed contact of the first two-way relay 332 is unsettled, and two moving contacts of the described first two-way relay 332 are connected with the reverse input end of the second amplifier U2.
The normal phase input end of the described second amplifier U2 is connected with its inverting input through a resistance R 7 through a resistance R 6 is connected the described second amplifier U2 with the simulation delivery outlet of described data collecting card 200 output terminal, and described output terminal also is connected with described test fixture 400 through resistance R 8, resistance R 9 and the resistance R 10 that is connected in series.
First normally closed contact of the 3rd two-way relay K 3 through a resistance R 11 be connected with described test fixture 400, first normally opened contact is unsettled, second normally opened contact of the 3rd two-way relay K 3 is connected with described test fixture 400 and through a resistance R 12 ground connection, second normally closed contact of the 3rd two-way relay K 3 is unsettled through a resistance R 12.
The normal phase input end of described the 3rd amplifier U3 is connected with two moving contacts of described the 3rd two-way relay K 3, inverting input is connected with its output terminal through a resistance R 14, the output terminal of described the 3rd amplifier U3 also is connected with first normally closed contact of the described first two-way relay 332, and two moving contacts of the described first two-way relay 332 are connected with the inverting input of the described second amplifier U2.
The grid of described N-type metal-oxide-semiconductor Q1 and P type metal-oxide-semiconductor Q2 all is connected with the end of described resistance R 9 near the described second amplifier U2, described N-type metal-oxide-semiconductor Q1 all is connected with the other end of described R9 with the source electrode of P type metal-oxide-semiconductor Q2, the drain electrode of described N-type metal-oxide-semiconductor Q1 and a positive direct-current power Vcc+be connected, the drain electrode of described P type metal-oxide-semiconductor Q2 is connected with a negative direct supply Vcc-, preferably, the positive direct-current power supply is positive 40 volts, and negative direct supply is negative 40 volts.
Whole constant voltage circuit 334 constitutes a backfeed loop, On/Off by the 3rd two-way relay K 3 is selected different feedback factors, when the simulation delivery outlet of data collecting card 200 is imported a voltage, test fixture 400 can obtain in requisition for the constant voltage of output by control, make that the highest output can reach 40V, and the input voltage maximal value is 10V, so two kinds of output multiples only need be set now---1 times and 5 times, when need output voltage during greater than 10V, closed the 3rd two-way relay K 3 then, the output multiple is defined as (R12+R13)/R13, when needs are output as 30V, when the output multiple is chosen as 5 times, then import 6V from the simulation delivery outlet of data collecting card 200, then test fixture 400 reaches and obtains the voltage of 30V.
In a preferred embodiment, described constant-current circuit 336 comprises four high guaily unit U4, the 5th amplifier U5 and the 6th amplifier U6.
The normal phase input end of described four high guaily unit U4 is connected with an end of described resistance R 10 close described test fixtures 400, the inverting input of described four high guaily unit U4 is connected with its output terminal through a resistance R 15, and the inverting input of described four high guaily unit U4 also is connected with the inverting input of described the 5th amplifier U5 through a resistance R 16;
The inverting input of described the 5th amplifier U5 through a resistance R 17 be connected with its output terminal, normal phase input end is connected with the end of described resistance R 10 away from described test fixture 400, the output terminal of described four high guaily unit U4 is connected with the normal phase input end of described the 6th amplifier U6 through a resistance R 18;
The normal phase input end of described the 6th amplifier U6 is connected with the output terminal of described four high guaily unit U4 through a resistance R 20 through the inverting input of a resistance R 19 ground connection, described the 6th amplifier U6, the inverting input of described the 6th amplifier U6 also is connected with its output terminal through a resistance R 21, and the output terminal of described the 6th amplifier U6 is connected with second normally opened contact of the described first two-way relay 332 as the output terminal of described constant-current circuit 336.
Feed back by the voltage difference that detects resistance R 10 both end voltage vin1 and vin2, voltage difference enlargement factor computing formula is (R15+R16+R17)/R16, wherein, R15=R17, then the steady current size of constant-current circuit 336 outputs is output end voltage V/R10.This constant-current circuit 336 is inserted in the backfeed loop, just can control the constant current that obtains in requisition for output by the different voltage of simulation delivery outlet output from data collecting card 200.Simulation delivery outlet output 5V voltage, the voltage difference enlargement factor is that 2, R10 resistance value is 1K Ω, then exports the steady current size and is 2.5mA.
In a preferred embodiment, described data collecting card 200 is the pci bus capture card.In other embodiments, data collecting card 200 can be the isa bus capture card.
In a preferred embodiment, described test fixture 400 is equipped with test interface and probe.
Now a kind of test event of giving an example is described in detail.
Test event: when the control end at high-tension circuit provides the excitation of 5V voltage, then high-voltage output end will be exported 110V voltage (error range 109-111V).
The configuration of at first test event of this PCBA500 to be measured being carried out test parameter of host computer 100, the port of configuration pilot relay 320 is A01; The analog output mouth is DA0, and output voltage is 5V; The analog input port is AI8, and input voltage need dwindle 20 times; Test higher limit 5.55V, lower limit 5.45V.
In test process, send corresponding signal control test console 300 by data collecting card 200, to I/O mouth expansion module 310, electric current and voltage stimulating module 330 and data processing module 340 are configured.
Each test point links to each other with relay 320 by lead, after relay 320 is opened, links to each other with electric current and voltage stimulating module 330 or data processing module 340.
After test process began, host computer 100 sent 10 road I/O mouth level by data collecting card 200 configurations earlier.Wherein 6 road I/O mouth level are by the relay 320 of I/O mouth expansion module 310 backs with regard to this road of gating A01, two-way I/O mouth level is selected the first two-way relay 332 and the 3rd two-way relay K 3 in the configuration voltages current excitation module 330, and the second two-way relay K 1, first relay K 2 that last 2 road I/O mouth level are selected configuration data processing module 340 is in order to amplify or to dwindle the multiple of test signal.
Simultaneously owing to output voltage 5V simulates in the scope ± 10V of output at data collecting card 200, do not need to dispose constant voltage circuit 334 output multiples, so this road I/O level is low level, not closed the 3rd two-way relay K 3, feedback level forms follow circuit by R11 and the 3rd amplifier U3, and the constant voltage feedback multiple of constant voltage circuit 334 is 1.
High-tension circuit control end on the PCBA500 to be measured is after receiving the 5V excitation voltage source, and high-tension circuit is started working, output 110V high pressure; The output terminal test fixture 400 of high-tension circuit links to each other with data processing module 340.
After receiving the control command of host computer 100, be configured to dwindle for output voltage 20 times circuit, after receiving the 110V voltage that high-tension circuit output terminal test fixture 400 passes back, data processing module 340 carries out signal to be handled, the 110V high pressure is dwindled 20 times after returned data capture card 200 analog input port AI8.
Whether the magnitude of voltage that host computer 100 is passed back in judgement is testing lower limit 5.45V, between the higher limit 5.55V, as between this judgement scope, then showing this magnitude of voltage, and store this value, as not between this judgement scope, then showing this magnitude of voltage, the alarm module red alarm, and show false alarm.
The proving installation test clamp 400 of above-mentioned Medical Devices PCBA links to each other with each test point of PCBA500 to be measured, transmit control signal control data collecting card 200 and test console 300 of host computer 100 sends driving source and tests to 400 couples of PCBA500 to be measured of test fixture, thereafter test fixture 400 shows the feedback test signal and outputs test result to host computer 100, by using the I/O mouth of I/O mouth expansion module 310 growth data capture cards 200, can control more test fixture 400, having realized can a plurality of test point of disposable covering, and the automatic test course of whole test results is exported in the realization robotization, satisfied the test request as a system, simultaneously, electric current and voltage stimulating module 330 can provide voltage drive and/or current excitation to output to test fixture 400, simultaneously voltage and/or the electric current of each test point of PCBA500 to be measured is tested.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. the proving installation of a Medical Devices PCBA is characterized in that, comprising:
Link to each other the test fixture of feedback test signal with each test point of PCBA to be measured;
Be connected with described test fixture, driving source be provided, control described test fixture switch test point and described test signal is carried out pretreated test console for described test fixture according to control signal;
Be connected the data collecting card that described control signal is exported to described test console and test signal is uploaded with described test console by shielded cable; And
Be connected by draw-in groove with described data collecting card, send described control signal and reception and analyze the host computer that outputs test result after the described test signal.
2. the proving installation of Medical Devices PCBA as claimed in claim 1 is characterized in that, described test console comprises:
Be connected with the I/O mouth of described data collecting card, be used for the I/O mouth expansion module of expansion I/O mouth;
A plurality of be connected described I/O mouth expansion module and described test fixture be connected between, control the relay of described test fixture switch test point;
Be connected with the simulation delivery outlet of described data collecting card, regulate the electric current and voltage stimulating module of driving source size; And
Be connected with the analog input mouth of described data collecting card, test signal be converted to the data processing module of the Validity Test scope of described data collecting card.
3. the proving installation of Medical Devices PCBA as claimed in claim 2 is characterized in that, described I/O mouth expansion module is code translator.
4. the proving installation of Medical Devices PCBA as claimed in claim 2, it is characterized in that, described electric current and voltage stimulating module comprises the first two-way relay, constant voltage circuit and the constant-current circuit that coil is connected with the I/O mouth of described data collecting card, and the described first two-way relay selects the constant voltage driving source of constant voltage circuit or the constant current drive source of constant-current circuit to output to described test fixture.
5. the proving installation of Medical Devices PCBA as claimed in claim 2 is characterized in that, described data processing module comprises the second two-way relay, first relay and first amplifier, wherein,
First normally closed contact of the described second two-way relay through a resistance R 1 be connected with described test fixture, first normally opened contact is unsettled, second normally opened contact of the described second two-way relay is connected with described test fixture and unsettled through a resistance R 3 ground connection, second normally closed contact through a resistance R 2;
The normal phase input end of described first amplifier is connected with two moving contacts of the described second two-way relay, the inverting input of described first amplifier is connected with its output terminal through a resistance R 4, and be connected with the moving contact of described first relay, the normally closed contact of described first relay is unsettled, normally opened contact is through a resistance R 5 ground connection, and the output terminal of described first amplifier is connected with the analog input mouth of described data acquisition as the output terminal of described data processing module.
6. the proving installation of Medical Devices PCBA as claimed in claim 4 is characterized in that, described constant voltage circuit comprises second amplifier, the 3rd amplifier, the 3rd two-way relay, N-type metal-oxide-semiconductor and P type metal-oxide-semiconductor, wherein,
The normal phase input end of described second amplifier is connected with its inverting input through a resistance R 7 through a resistance R 6 is connected described second amplifier with the simulation delivery outlet of described data collecting card output terminal, and described output terminal also is connected with described test fixture through resistance R 8, resistance R 9 and the resistance R 10 that is connected in series;
First normally closed contact of the 3rd two-way relay through a resistance R 11 be connected with described test fixture, first normally opened contact is unsettled, second normally opened contact of the 3rd two-way relay is connected with described test fixture and through a resistance R 12 ground connection, second normally closed contact of the 3rd two-way relay is unsettled through a resistance R 12;
The normal phase input end of described the 3rd amplifier is connected with two moving contacts of described the 3rd two-way relay, inverting input is connected with its output terminal through a resistance R 14, the output terminal of described the 3rd amplifier also is connected with first normally closed contact of the described first two-way relay, and two moving contacts of the described first two-way relay are connected with the inverting input of described second amplifier;
The grid of described N-type metal-oxide-semiconductor and P type metal-oxide-semiconductor all is connected with the end of described resistance R 9 near described second amplifier, the source electrode of described N-type metal-oxide-semiconductor and P type metal-oxide-semiconductor all is connected with the other end of described R9, the drain electrode of described N-type metal-oxide-semiconductor is connected with a positive direct-current power supply, and the drain electrode of described P type metal-oxide-semiconductor is connected with a negative direct supply.
7. the proving installation of Medical Devices PCBA as claimed in claim 6 is characterized in that, described constant-current circuit comprises four high guaily unit, the 5th amplifier and the 6th amplifier, wherein,
The normal phase input end of described four high guaily unit is connected with an end of described resistance R 10 close described test fixtures, inverting input is connected with its output terminal through a resistance R 15, and the inverting input of described four high guaily unit also is connected with the inverting input of described the 5th amplifier through a resistance R 16;
The inverting input of described the 5th amplifier through a resistance R 17 be connected with its output terminal, normal phase input end is connected with the end of described resistance R 10 away from described test fixture, the output terminal of described four high guaily unit is connected with the normal phase input end of described the 6th amplifier through a resistance R 18;
The normal phase input end of described the 6th amplifier is connected with the output terminal of described four high guaily unit through a resistance R 20 through a resistance R 19 ground connection, inverting input, the inverting input of described the 6th amplifier also is connected with its output terminal through a resistance R 21, and the output terminal of described the 6th amplifier is connected with second normally opened contact of the described first two-way relay as the output terminal of described constant-current circuit.
8. as the proving installation of each described Medical Devices PCBA of claim 1 to 7, it is characterized in that described data collecting card is the pci bus capture card.
9. the proving installation of Medical Devices PCBA as claimed in claim 3 is characterized in that, described code translator is the 6-64 code translator.
10. as the proving installation of each described Medical Devices PCBA of claim 1 to 7, it is characterized in that described test fixture is equipped with test interface and probe.
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| CN110346614A (en) * | 2019-08-23 | 2019-10-18 | 深圳市新威尔电子有限公司 | The test fixture of precision resistance is provided |
| CN110967623A (en) * | 2019-12-31 | 2020-04-07 | 深圳市明信测试设备有限公司 | ICT (information communication technology) extension fixture for testing number of pins of PCBA (printed circuit board assembly) board and testing method |
| CN112240944A (en) * | 2020-12-17 | 2021-01-19 | 天津飞旋科技有限公司 | Test system, test method, and computer-readable storage medium |
| CN113219320A (en) * | 2021-04-16 | 2021-08-06 | 深圳市安仕新能源科技有限公司 | BMS circuit board checking method, system, readable storage medium and terminal equipment |
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2013
- 2013-03-01 CN CN 201320096301 patent/CN203117380U/en not_active Expired - Fee Related
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| CN104166051A (en) * | 2014-08-12 | 2014-11-26 | 中国兵器工业集团第二一四研究所苏州研发中心 | Method for testing on-resistances of 16-channel analog switch circuit |
| CN104166051B (en) * | 2014-08-12 | 2016-11-09 | 中国兵器工业集团第二一四研究所苏州研发中心 | A kind of method of testing of 16 tunnels analogy on-off circuit conducting resistance |
| CN110346614A (en) * | 2019-08-23 | 2019-10-18 | 深圳市新威尔电子有限公司 | The test fixture of precision resistance is provided |
| CN110346614B (en) * | 2019-08-23 | 2024-02-02 | 深圳市新威尔电子有限公司 | Test fixture for providing precise resistance |
| CN110967623A (en) * | 2019-12-31 | 2020-04-07 | 深圳市明信测试设备有限公司 | ICT (information communication technology) extension fixture for testing number of pins of PCBA (printed circuit board assembly) board and testing method |
| CN112240944A (en) * | 2020-12-17 | 2021-01-19 | 天津飞旋科技有限公司 | Test system, test method, and computer-readable storage medium |
| CN113219320A (en) * | 2021-04-16 | 2021-08-06 | 深圳市安仕新能源科技有限公司 | BMS circuit board checking method, system, readable storage medium and terminal equipment |
| CN113219320B (en) * | 2021-04-16 | 2023-03-10 | 深圳市安仕新能源科技有限公司 | BMS circuit board checking method, system, readable storage medium and terminal equipment |
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