CN203039918U - Wireless terminal testing device and wireless terminal testing system - Google Patents
Wireless terminal testing device and wireless terminal testing system Download PDFInfo
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- CN203039918U CN203039918U CN201220634824.0U CN201220634824U CN203039918U CN 203039918 U CN203039918 U CN 203039918U CN 201220634824 U CN201220634824 U CN 201220634824U CN 203039918 U CN203039918 U CN 203039918U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
本实用新型公开了一种无线终端测试装置和系统，所述装置包括：测试端口扩展装置（1）中的控制单元（11）接收无线终端测试系统中的主控装置（2）发送的切换控制指令，并根据切换控制指令向通信接口切换开关（12）、电源切换开关（13）以及测试信号切换开关（14）发送切换指令；测试端口扩展装置（1）中的电源切换开关（13）根据切换指令控制N路端子进行通断切换；测试端口扩展装置（1）中的测试信号切换开关（14）根据切换指令控制N路端子进行通断切换；测试端口扩展装置（1）中的通信接口切换开关（12）根据切换指令控制N路端子进行通断切换。通过上述装置，可以提高无线终端测试的效率，并减少资源的浪费。
The utility model discloses a wireless terminal testing device and system. The device comprises: a control unit (11) in a test port expansion device (1) receives switching control sent by a main control device (2) in the wireless terminal testing system; instructions, and send switching instructions to the communication interface switching switch (12), power switching switch (13) and test signal switching switch (14) according to the switching control command; the power switching switch (13) in the test port expansion device (1) according to The switching instruction controls the N-way terminals to perform on-off switching; the test signal switching switch (14) in the test port expansion device (1) controls the N-way terminals to perform on-off switching according to the switching command; the communication interface in the test port expansion device (1) The switching switch (12) controls the N-way terminals to perform on-off switching according to the switching instruction. Through the above device, the efficiency of wireless terminal testing can be improved, and the waste of resources can be reduced.
Description
Technical field
The utility model relates to communication technical field, relates in particular to a kind of wireless terminal testing apparatus and system.
Background technology
At present, the communication test scheme of wireless terminal, as shown in Figure 1, be by by master control set, supply unit, the test macro of a testing equipment and a test fixture composition is tested wireless terminal, whenever test a wireless terminal, need end test by operating personnel, and change tested wireless terminal, and when operating personnel change tested wireless terminal, test macro is in idle state, has caused the wasting of resources of test macro, simultaneously, because test macro only needs the time of a few minutes namely can finish test to a wireless terminal, therefore operating personnel need continual test macro to be monitored, and with when the EOT, in time change tested wireless terminal, but because operating personnel are in idle condition in the time period of control and measuring system, therefore cause waste of manpower resource.
In the prior art, the scheme that does not also solve the problems of the technologies described above.
The utility model content
The utility model embodiment provides a kind of wireless terminal testing apparatus and system, to improve the efficient of wireless terminal test, reduces the waste of resource.
For achieving the above object, the utility model embodiment provides a kind of test port expanding unit (being the wireless terminal testing apparatus), be applied to the wireless terminal test macro, described test port expanding unit comprises: control unit, communication interface diverter switch, power change-over switch and test signal diverter switch, wherein:
Described control unit, respectively with described communication interface diverter switch, described power change-over switch, described test signal diverter switch, and the master control set in the described wireless terminal test macro is electrically connected, be used for receiving the switching controls instruction that described master control set sends, and send switching command according to described switching controls instruction to described communication interface diverter switch, described power change-over switch and described test signal diverter switch;
Described communication interface diverter switch is electrically connected with master control set in the described wireless terminal test macro, is connected with the signaling interface of N dut terminal by N road terminal, is used for carrying out break-make according to described switching command control N road terminal and switches;
Described power change-over switch is electrically connected with the external power source device of described test port expanding unit outside, is connected with the receiving end mouth of N dut terminal by N road terminal, is used for carrying out break-make according to described switching command control N road terminal and switches;
Described test signal diverter switch is electrically connected with testing equipment, is connected with the antenna port of N dut terminal by N road terminal, is used for carrying out break-make according to described switching command control N road terminal and switches;
Wherein, N 〉=1.
Preferably, described test port expanding unit also comprises the interface mains switch, wherein:
Described interface mains switch, be electrically connected with the internal electric source device of described control unit and described test port expanding unit inside, be connected with the receiving end mouth of N dut terminal by N road terminal, be used for carrying out break-make according to described switching command control N road terminal and switch.
Preferably, described testing equipment comprises first testing equipment and second testing equipment, and described test signal diverter switch comprises the first test signal diverter switch and the second test signal diverter switch, wherein:
The described first test signal diverter switch is electrically connected with described first testing equipment, is connected with the reception antenna port of N dut terminal by N road terminal, is used for carrying out break-make according to described switching command control N road terminal and switches;
The described second test signal diverter switch is electrically connected with described second testing equipment, is connected with the dual-mode antenna port of N dut terminal by N road terminal, is used for carrying out break-make according to described switching command control N road terminal and switches.
Preferably, described test port expanding unit also comprises temperature sensor and the heating resistor that is electrically connected with described control unit, described temperature sensor detects the temperature of described test signal diverter switch and is transferred to described control unit, the temperature that described control unit detects according to described temperature sensor, regulate the electric current by described heating resistor, with the temperature maintenance of described test signal diverter switch at steady state value.
Preferably, described test port expanding unit also comprises the nonvolatile memory that is electrically connected with described control unit, when described control unit was controlled the break-make of the N road terminal that is connected with N dut terminal respectively in described power change-over switch, described test signal diverter switch and the described communication interface diverter switch by described switching command, described control unit recorded the number of times of each road terminal break-make by described nonvolatile memory.
The utility model embodiment also provides a kind of wireless terminal test macro, and described system comprises: master control set, external power source device, testing equipment, and one of above-mentioned described test port expanding unit;
Described master control set, be electrically connected with described test port expanding unit, described external power source device and described testing equipment respectively, be used for by send the parameter configuration instruction to described testing equipment, send the power supply control command to described external power source device, and the test result of N dut terminal transmission of reception, wherein, N 〉=1;
Described external power source device is electrically connected with described test port expanding unit, is used for receiving described power supply control command, and according to described power supply control command, provides electric energy or termination to provide electric energy to N dut terminal to N dut terminal;
Described testing equipment is electrically connected with described test port expanding unit, is used for receiving described parameter configuration instruction, and according to described parameter configuration instruction, the test signal that configuration sends.
Compared with prior art, the utility model embodiment provides a kind of test port expanding unit, by control unit, communication interface diverter switch, power change-over switch and the test signal diverter switch that arranges in this test expanding unit, and by the switching controls instruction of control unit according to the master control set transmission, send switching command to communication interface diverter switch, power change-over switch and test signal diverter switch, the break-make of the terminal that is connected with dut terminal with control communication interface diverter switch, power change-over switch and test signal diverter switch.By this device, can improve the efficient of wireless terminal test, and reduce the waste of resource.
Description of drawings
The structural representation of a kind of wireless terminal test macro that Fig. 1 provides for the utility model background technology;
The structural representation of a kind of wireless terminal test macro that Fig. 2 provides for the utility model embodiment;
The structural representation of the test port expanding unit that Fig. 3 provides for the utility model embodiment;
The structural representation of the communication interface diverter switch that provides among the utility model embodiment is provided Fig. 4;
The structural representation of the power change-over switch that Fig. 5 provides for the utility model embodiment;
The structural representation of the first test signal diverter switch that Fig. 6 provides for the utility model embodiment;
The structural representation of the second test signal diverter switch that Fig. 7 provides for the utility model embodiment.
Marginal data:
1, test port expanding unit 11, control unit
12, communication interface diverter switch 121, internal electric source device
122, interface mains switch 13, power change-over switch
14, test signal diverter switch 141, the first test signal diverter switch
1411, temperature sensor 1412, heating resistor
142, the second test signal diverter switch 15, nonvolatile memory
2, master control set 3, external power source device
4, testing equipment 5, dut terminal
Embodiment
Below in conjunction with the accompanying drawing in the utility model, the technical scheme in the utility model is clearly and completely described, obviously, described embodiment only is a part of embodiment of the present utility model, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 2, the structural representation of the wireless terminal test macro that provides for the utility model embodiment, in the utility model embodiment, it is eight with dut terminal 5, testing equipment 4 is two and describes for example, but in actual applications, can increase or reduce the quantity of dut terminal 5 and tester according to actual needs arbitrarily, concrete, when needs reduce dut terminal 5 quantity, only need the software in the master control set 2 is carried out simple modification, when needs increase dut terminal 5 quantity, can adopt the mode of many test port expanding unit 1 cascades, not repeat them here.
In the test port expanding unit 1 that the utility model embodiment provides, as shown in Figure 3, can comprise control unit 11, communication interface diverter switch 12, power change-over switch 13 and test signal diverter switch 14, wherein:
Communication interface diverter switch 12 is electrically connected with master control set 2 in the wireless terminal test macro, is connected with the signaling interface of N dut terminal 5 by N road terminal, is used for carrying out break-make according to switching command control N road terminal and switches;
Power change-over switch 13 is electrically connected with the external power source device 3 of test port expanding unit 1 outside, is connected with the receiving end mouth of N dut terminal 5 by N road terminal, is used for carrying out break-make according to switching command control N road terminal and switches;
Test signal diverter switch 14 is electrically connected with testing equipment 4, is connected with the antenna port of N dut terminal 5 by N road terminal, is used for carrying out break-make according to switching command control N road terminal and switches;
Wherein, N 〉=1.
Preferably, can switch be set at every circuit, by the closed of control unit 11 control switchs or disconnect, with the break-make of control terminal, also can adopt variable connector, by control unit 11 control switchs beat to, with the break-make of control terminal.
Concrete, in the scene of eight dut terminals 5 that the utility model embodiment provides, control unit 11 needs to control the test to eight dut terminals 5, and communication interface diverter switch 12, power change-over switch 13, test signal diverter switch 14 need and corresponding signal can be divided into eight the tunnel, to send to eight dut terminals 5 respectively.Preferably, for communication interface diverter switch 12, adopt eight circuit-switched data lines, the test instruction that master control set 2 is sent is divided into eight the tunnel, to send to the signaling interface of eight dut terminals 5 respectively, for power change-over switch 13, adopt No. eight power lines, the electric energy that the external power source device 3 of test port expanding unit 1 outside is provided is divided into eight the tunnel, to send to the receiving end mouth of eight dut terminals 5 respectively, for test signal diverter switch 14, adopt eight road holding wires, the test signal that testing equipment 4 is sent is divided into eight the tunnel, to send to the antenna port of eight dut terminals 5 respectively.
Below, in conjunction with Figure of description communication interface diverter switch 12, power change-over switch 13, test signal diverter switch 14 are carried out concrete elaboration.
As shown in Figure 4, structural representation for the communication interface diverter switch 12 that provides among the utility model embodiment, communication interface diverter switch 12 is connected with dut terminal 5 with master control set 2 respectively with outgoing interface by incoming interface, wherein, concrete interface type can be selected arbitrarily according to actual needs, preferably, in the utility model embodiment, the interface of communicating by letter with dut terminal 5 on the control unit 11 can be A type USB(Universal Serial BUS, USB) interface, the interface of communicating by letter with master control set 2 is the USB2.0 interface, and the USB interface of communicating by letter with control unit 11 on the master control set 2 can be the Type B USB interface.All be provided with switch on every circuit between incoming interface and the outgoing interface, control unit 11 is by disconnection or the closure of switching command control switch, to control the break-make of the terminal that is connected with the signaling interface of eight dut terminals 5 respectively.
Preferably, test port expanding unit 1 can also comprise interface mains switch 122, wherein:
Interface mains switch 122 is electrically connected with the internal electric source device 121 of control unit 11 and test port expanding unit 1 inside, is connected with the receiving end mouth of N dut terminal 5 by N road terminal, is used for carrying out break-make according to switching command control N road terminal and switches.
Concrete, in test port expanding unit 1, can be provided with built-in internal electric source device 121, internal electric source device 121 can be connected with the signaling interface of eight dut terminals 5 respectively by eight interface supply lines, the break-make of eight road terminals that can be connected with eight road interfaces by a master switch control between this internal electric source device 121 and the dut terminal 5, this internal electric source device 121 is used for powering to dut terminal 5 by the receiving end mouth of dut terminal 5, preferably, this receiving end mouth can be the USB interface of dut terminal 5, at synchronization, only need to guarantee that in external power source device 3 and the internal electric source device 121 one provides electric energy to dut terminal 5, namely can guarantee the operate as normal of dut terminal 5.By this built-in power is set, when can be implemented in external power source device 3 and can't provide electric energy to dut terminal 5, guarantee the operate as normal of dut terminal 5.
As shown in Figure 5, the structural representation of the power change-over switch 13 that provides for the utility model embodiment, power change-over switch 13 is connected with dut terminal 5 with the external power source device 3 of test port expanding unit 1 outside respectively by power supply incoming interface and power supply outgoing interface, all be provided with switch on every circuit between power supply incoming interface and the power supply outgoing interface, control unit 11 is by disconnection or the closure of switching command control switch, to control the break-make of the terminal that is connected with the power interface of eight dut terminals 5 respectively, preferably, external power source device 3 is DC power supply, DC power supply is electrically connected with master control set 2, and whether provides electric energy to dut terminal 5 according to the power supply control command control that master control set 2 sends.
Preferably, in the utility model embodiment, testing equipment 4 can comprise first testing equipment 41 and second testing equipment 42, and test signal diverter switch 14 can comprise the first test signal diverter switch 141 and the second test signal diverter switch 142, wherein:
The first test signal diverter switch 141 is electrically connected with first testing equipment 41, is connected with the reception antenna port of N dut terminal 5 by N road terminal, is used for carrying out break-make according to switching command control N road terminal and switches; The second test signal diverter switch 142 is electrically connected with second testing equipment 42, is connected with the dual-mode antenna port of N dut terminal 5 by N road terminal, is used for carrying out break-make according to switching command control N road terminal and switches.Preferably, master control set 2 can pass through GPIB(General-Purpose Interface Bus, general-purpose interface bus) bus is connected with second testing equipment 42 with first testing equipment 41 respectively, and send the parameter configuration instruction by master control set 2 to first testing equipment 41 and second testing equipment 42, be configured with the parameter to first testing equipment 41 and second testing equipment 42.By using two testing equipments that dut terminal 5 is tested simultaneously, can obtain the test result when dut terminal 5 receives different test signals simultaneously, improved testing efficiency.
As shown in Figure 6, the structural representation of the first test signal diverter switch 141 that provides for the utility model embodiment, the first test signal diverter switch 141 is connected with dut terminal 5 with first testing equipment 41 respectively by the first radio frequency incoming interface and the first radio frequency outgoing interface, all be provided with switch on every circuit between the first radio frequency incoming interface and the first radio frequency outgoing interface, control unit 11 is by disconnection or the closure of switching command control switch, to control the break-make of the terminal that is connected with the reception antenna port of eight dut terminals 5 respectively, preferably, the first radio frequency incoming interface adopts the cloudy head connector of N-type, be connected with the high accuracy of first testing equipment 41 with realization, the first radio frequency outgoing interface adopts the cloudy head connector of SMA type, is connected with the direct of mobile phone test anchor clamps with realization.First test signal that first radio-frequency apparatus sends sends to eight dut terminals 5 respectively, so that dut terminal 5 can obtain first test result according to first test signal after the process shunt.
Preferably, test port expanding unit 1 also comprises temperature sensor 1411 and the heating resistor 1412 that is electrically connected with control unit 11, detects the temperature of test signal diverter switch 14 and is transferred to control unit 11; The temperature that control unit 11 detects according to temperature sensor 1411 is regulated the electric current by heating resistor 1412, with the temperature maintenance of test signal diverter switch 14 at steady state value.Preferably, can be provided with temperature threshold in the control unit 11, temperature threshold can be set to 55 degree.By temperature sensor 1411 and heating resistor 1412 are set, can accurately control the temperature of the first test diverter switch, with accurate ride gain, thereby obtain accurately stable test result.
Preferably, as shown in Figure 6, also be provided with a plurality of load resistances in the first test diverter switch, the switch that arranges on every circuit in the first test diverter switch can be single-pole double-throw switch (SPDT), when one or more terminal that is connected with dut terminal 5 in the control unit 11 controls first test diverter switch disconnects, control unit 11 need be controlled the switch that arranges on this road terminal simultaneously and beat to load resistance, so that this road terminal is connected with load resistance, thereby guarantee the power stability of circuit in the first test diverter switch.Preferably, the resistance of load resistance can be identical with the resistance of dut terminal 5.
Preferably, as shown in Figure 6, can damping resistance be set the circuit in the first test diverter switch, and in the first radio frequency porch low noise amplifier is set, by damping resistance is set, can know test signal decay in the circuit transmission process accurately by known resistance, and decay arranges corresponding low noise amplifier according to test signal, thus make first radio frequency outlet output first test signal decay to 0.
As shown in Figure 7, the structural representation of the second test signal diverter switch 142 that provides for the utility model embodiment, the second test signal diverter switch 142 is connected with dut terminal 5 with second testing equipment 42 respectively by the second radio frequency incoming interface and the second radio frequency outgoing interface, adopt variable connector between the second radio frequency incoming interface and the second radio frequency outgoing interface, control unit 11 by switching command control variable connector beat to, to control the break-make of the terminal that is connected with the reception antenna port of eight dut terminals 5 respectively, preferably, the second radio frequency incoming interface adopts the cloudy head connector of N-type, be connected with the high accuracy of second testing equipment 42 with realization, the second radio frequency outgoing interface adopts the cloudy head connector of SMA type, be connected with the direct of mobile phone test anchor clamps with realization, preferably, the second test signal diverter switch 142 adopts high-power (greater than 40dBm), the high-precision radio frequency switch of low-loss (less than 0.2dB).Second test signal that second testing equipment 42 sends is after the process shunt, send to eight dut terminals 5 respectively, so that dut terminal 5 can obtain second test result according to second test signal, simultaneously, second testing equipment 42 receives the 3rd test signal of the transmission of eight dut terminals 5, so that second testing equipment 42 can obtain the 3rd test result according to the 3rd test signal.
Preferably, test port expanding unit 1 also comprises the nonvolatile memory 15 that is electrically connected with control unit 11, when control unit 11 was controlled the break-make of the N road terminal that is connected with N dut terminal 5 respectively in power change-over switch 13, test signal diverter switch 14 and the communication interface diverter switch 12 by switching command, control unit 11 was by the number of times of nonvolatile memory 15 each road terminal break-make of record.
Concrete, when the switch that arranges on control unit 11 each road terminal of control disconnects or is closed, control unit 11 simultaneously each switch is disconnected and closed number of times is recorded in NVRAM(Non-Volatile Random Access Memory, nonvolatile memory) in, so that the operating position of operating personnel's pilot switch, when switch disconnects or closed number of times approaches or when reaching useful life, the switch that operating personnel can in time more renew is to guarantee the operate as normal of test port expanding unit 1.Preferably, nonvolatile memory 15 can adopt EEPROM(Electrically Erasable Programmable Read-Only Memory, EEPROM (Electrically Erasable Programmable Read Only Memo)) so that control unit 11 real-time update data.
Preferably, the test port expanding unit 1 that the utility model embodiment provides can also comprise positioning indicator, and control unit 11 is electrically connected with positioning indicator.Preferably, positioning indicator can adopt Light-Emitting Diode, for communication interface diverter switch 12, power change-over switch 13, the first test signal diverter switch 141 and the second test signal diverter switch 142, all be provided with corresponding Light-Emitting Diode, when communication interface diverter switch 12, power change-over switch 13, the first test signal diverter switch 141 or 142 energisings of the second test signal diverter switch are started working, the corresponding Light-Emitting Diode energising of control unit 11 controls is started working so that operating personnel are known respective switch.
Preferably, the test port expanding unit 1 that the utility model embodiment provides can also comprise the antistatic protection unit, and the antistatic protection unit can be arranged at each interface, with component failure or the damage of avoiding causing owing to accumulation of static electricity.
Below, in conjunction with concrete testing process, embodiment further sets forth to the utility model, and in the utility model embodiment, being respectively terminal to eight terminal, a test signal with eight dut terminals 5 is that radiofrequency signal is that example describes.
When the test beginning, the control software of installing in the master control set 2 sends the switching controls instruction to control unit 11, testing software sends test instruction, sends the parameter configuration instruction and send the power supply control command to external power source to first testing equipment 41, second testing equipment 42 to eight dut terminals 5 by communication interface diverter switch 12, preferably, this switching controls instruction can be tested eight dut terminals 5 successively for 11 controls of indication control unit.
For communication interface diverter switch 12 and the second test signal diverter switch 142, control unit 11 passes through switching command, in the control communication interface diverter switch 12 with circuit that terminal is connected on the switch closure that arranges, to avoid a plurality of dut terminals 5 to send the test crash that test result was caused to master control set 2 simultaneously, simultaneously, control unit 11 passes through switching command, control in the second test signal diverter switch 142 with circuit that terminal is connected on the switch closure that arranges, to avoid a plurality of dut terminals 5 to send the 3rd radio frequency signal, the test crash that causes to second testing equipment 42 simultaneously.
A terminal is after receiving test instruction, first radiofrequency signal, second radiofrequency signal, send first test result and second test result according to first radiofrequency signal and second radiofrequency signal to master control set 2, after second testing equipment 42 receives the 3rd radio frequency signal of terminal transmission, send the 3rd test result according to the 3rd radio frequency signal to master control set 2.After master control set 2 receives first test result, second test result and the 3rd test result, master control set 2 is judged terminal test test Cheng Gong, send the switching controls instruction to control unit 11, instruction sends switching command so that control unit 11 is according to switching controls, with continuation No. two terminals are tested, concrete operations are to aforementioned similar, and difference need this moment to be the switch connection that arranges on control and the circuit that No. two terminals are connected, does not repeat them here.After the test to eight dut terminals 5 all finishes, the dut terminal 5 that operating personnel can more renew, and proceed test.
If master control set 2 does not receive test result, or only receive in above-mentioned three test results one or two, the test crash that master control set 2 is judged a terminal, at this moment, master control set 2 can be tested a terminal again according to preset strategy, also can continue other-end is tested.
Through the above description of the embodiments, those skilled in the art can be well understood to the utility model and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding, the part that the technical solution of the utility model contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium, comprise that some instructions are with so that a computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the utility model.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in the accompanying drawing or flow process might not be that enforcement the utility model is necessary.
It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of above-described embodiment can be merged into a module, also can further split into a plurality of submodules.
Above-mentioned the utility model embodiment sequence number does not represent the quality of embodiment just to description.
More than disclosed only be several specific embodiment of the present utility model, still, the utility model is not limited thereto, any those skilled in the art can think variation all should fall into protection range of the present utility model.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220634824.0U CN203039918U (en) | 2012-11-27 | 2012-11-27 | Wireless terminal testing device and wireless terminal testing system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201220634824.0U CN203039918U (en) | 2012-11-27 | 2012-11-27 | Wireless terminal testing device and wireless terminal testing system |
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| CN203039918U true CN203039918U (en) | 2013-07-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107870834A (en) * | 2016-09-28 | 2018-04-03 | 达丰(上海)电脑有限公司 | A kind of measurement jig of hard disk backboard |
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2012
- 2012-11-27 CN CN201220634824.0U patent/CN203039918U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107870834A (en) * | 2016-09-28 | 2018-04-03 | 达丰(上海)电脑有限公司 | A kind of measurement jig of hard disk backboard |
| CN107870834B (en) * | 2016-09-28 | 2024-03-29 | 达丰(上海)电脑有限公司 | Testing jig for hard disk backboard |
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