CN220525942U - Portable miniature film electricity testing arrangement - Google Patents
Portable miniature film electricity testing arrangement Download PDFInfo
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- CN220525942U CN220525942U CN202322104889.5U CN202322104889U CN220525942U CN 220525942 U CN220525942 U CN 220525942U CN 202322104889 U CN202322104889 U CN 202322104889U CN 220525942 U CN220525942 U CN 220525942U
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- 238000012360 testing method Methods 0.000 title claims abstract description 51
- 230000005611 electricity Effects 0.000 title abstract description 3
- 238000001514 detection method Methods 0.000 claims abstract description 245
- 238000012545 processing Methods 0.000 claims abstract description 35
- 230000003993 interaction Effects 0.000 claims abstract description 21
- 239000010409 thin film Substances 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims description 88
- 238000004891 communication Methods 0.000 claims description 8
- 239000000523 sample Substances 0.000 abstract description 8
- 239000010408 film Substances 0.000 abstract description 6
- 230000005669 field effect Effects 0.000 abstract description 5
- 238000012512 characterization method Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a portable miniature film electricity testing device, which belongs to the technical field of electric performance characterization, and comprises a man-machine interaction module, a data acquisition and processing module and a power module; the man-machine interaction module is arranged on the outer surface of the testing device and is integrated with the data acquisition and processing module and the power module; the data processing module comprises at least four detection circuits, wherein at least three detection circuits are provided with built-in shift switches; the detection circuit is also provided with an amplifier, the input end and the output end of the amplifier are connected with the region to be detected through the built-in shift switch, the problems of complex structure and circuit, large volume, inconvenient carrying and the like of a thin film device test are solved, and the field effect transistor device and the four-probe thermoelectric model device test of one set of equipment is realized.
Description
Technical Field
The utility model relates to the technical field of electrical performance characterization, in particular to a portable miniature thin film electrical testing device.
Background
Organic thin film devices are widely used in the fields of flexible display, radio frequency electronic tags, electronic skin, sensors and the like; the organic thin film device comprises a polar field effect transistor (OFET), an organic thermoelectric device, an organic diode and the like, and utilizes the electrical property regulation and control characteristics of conjugated semiconductor materials to realize the conversion of physical, chemical and biological signals into electric signals 。
In the prior art, the signal test of the organic thin film device mostly adopts a semiconductor tester, the circuit structure is complex, the system operation is complex, the occupied area is large, the carrying is inconvenient, the test requirements of any time and any place are difficult to meet, and the application of the organic thin film device in the aspects of sports health, biomedical monitoring and the like is limited.
Disclosure of Invention
In view of the above analysis, the present utility model aims to provide a portable micro thin film electrical testing device, which solves at least one of the problems of complicated structure and circuit, large volume, inconvenient carrying, etc. of the existing thin film device testing device.
The aim of the utility model is mainly realized by the following technical scheme:
the utility model discloses a portable micro-film electrical testing device, which comprises: the system comprises a man-machine interaction module, a data acquisition and processing module and a power module;
the man-machine interaction module is arranged on the outer surface of the testing device, the data acquisition and processing module and the power module are integrated in the electrical testing device, and the data acquisition and processing module is connected with the power module and the man-machine interaction module through circuits;
the data acquisition and processing module comprises at least four detection circuits, wherein at least three detection circuits are provided with built-in shift switches;
the detection circuit is also provided with an amplifier, and the input end and the output end of the amplifier are connected with the area to be detected through a built-in shift switch of the detection circuit.
Preferably, the four detection circuits are a first detection circuit, a second detection circuit, a third detection circuit and a fourth detection circuit and are sequentially arranged; the data acquisition and processing module further comprises a storage control unit; the first detection circuit, the second detection circuit, the third detection circuit and the fourth detection circuit are further provided with a digital-to-analog conversion unit which is communicated with the input end of the amplifier and the storage control unit.
Preferably, the data acquisition and processing module further comprises an analog-to-digital conversion unit communicated with the storage control unit; and the first detection circuit, the second detection circuit, the third detection circuit and the fourth detection circuit are also provided with an emission-following voltage dividing unit, the input end of the emission-following voltage dividing unit is communicated with the digital-to-analog conversion unit, and the output end of the emission-following voltage dividing unit is communicated with the analog-to-digital conversion unit.
Preferably, the data acquisition and processing module further comprises a first detection port, a second detection port, a third detection port and a fourth detection port; the first detection port, the second detection port, the third detection port and the fourth detection port are sequentially arranged; the first detection port is communicated with the first detection circuit, the second detection port is communicated with the second detection circuit, the third detection port is communicated with the third detection circuit, and the fourth detection port is communicated with the fourth detection circuit.
Preferably, the first detection circuit is provided with a first amplifier, the input end of the first amplifier is communicated with the analog-to-digital conversion unit in the first detection circuit, and the output end of the first amplifier is communicated with the region to be detected corresponding to the first detection circuit; the second detection circuit is provided with a second amplifier, and the input end and the output end of the second amplifier are communicated with an analog-to-digital conversion unit in the second detection circuit through a first built-in shift switch; the third detection circuit is provided with a third amplifier, and the input end and the output end of the third amplifier are communicated with the analog-to-digital conversion unit in the third detection circuit through a second built-in shift switch.
Preferably, the second detection circuit and the third detection circuit are respectively provided with a built-in shift switch and an analog-to-digital conversion unit.
Preferably, the electrical testing device comprises: the second detection circuit is provided with a first detection branch and a first built-in shift switch, and the third detection circuit is provided with a second detection branch and a second built-in shift switch; one end of the first detection branch is connected with the output end of the second amplifier through a first built-in shift switch, and the other end of the first detection branch is communicated with the analog-to-digital conversion unit; one end of the second detection branch is connected with the output end of the third amplifier through a second built-in shift switch, and the other end of the second detection branch is communicated with the analog-to-digital conversion unit.
Preferably, the fourth detection circuit is provided with a plurality of amplifiers, and the built-in shift switch and the analog-to-digital conversion unit are both provided with one amplifier.
Preferably, the fourth detection circuit is provided with a third built-in shift switch, the amplifier in the fourth detection circuit comprises a fourth amplifier and a fifth amplifier which are connected in series, the input end of the fifth amplifier is connected with the output end of the digital-to-analog conversion unit, the output end of the fifth amplifier is communicated with the input end of the fourth amplifier through the third built-in shift switch, and the output end of the fourth amplifier is communicated with the region to be detected through the third built-in shift switch.
Preferably, the fourth detection circuit is provided with a third detection branch, one end of the third detection branch is connected with the fourth amplifier through a third built-in shift switch, and the other end of the third detection branch is connected with the digital-to-analog conversion unit.
Compared with the prior art, the utility model has at least one of the following beneficial effects:
(1) The device can test the basic electrical properties of a photodiode, a resistor, a field effect transistor device and a four-probe thermoelectric model device, can be connected with various types of sensors, realizes signal testing on temperature, substances and the like, and is used for monitoring human health and biomedical aspects in real time.
(2) The built-in shift switch is arranged at the joint of the amplifier and the area to be detected, so that the amplifier can amplify both detection signals of the detection area and control signals of the detection area, and the detection circuit can collect and control the detection signals of the detection area according to requirements;
(3) The utility model relates to a miniature test instrument which is used for testing a highly integrated device, displaying data, calculating performance, storing data and collecting cloud information, has the characteristics of convenience in carrying, simplicity in operation and stable signals, and can meet the requirement of real-time monitoring at any time and any place.
(4) The test port is arranged in a plugging structure, so that the contact between the detection point of the tester and the electrode of the electronic device can be realized, the electronic device can be plugged and unplugged conveniently by adjusting the test pressure point and the type of the clamp, the damage of the surface to the electrode of the contact point of the device can be realized, and the repeated use of the device can be realized;
(5) In the utility model, a high-precision analog-to-digital conversion unit is adopted for data sampling; performing voltage generation by adopting a digital-to-analog conversion unit; adopting a special current-voltage conversion circuit to perform signal transmission; the method adopts a mode of combining a series amplifier structure to carry out multiple filtering and signal processing, ensures the integrity of the acquired signals, and has high precision and signal stability;
(6) The utility model adopts the high-resolution capacitive touch screen to perform human-computer interaction interface; adopting a USB interface to read back data; the lithium battery with light weight and large specific capacity is arranged in the battery to supply power, so that the battery is safe to use, large in capacity and long in standby time.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the utility model, like reference numerals being used to refer to like parts throughout the several views.
FIG. 1 is a schematic diagram of a portable miniature thin film electrical testing device of the present utility model;
FIG. 2 is a schematic diagram of a portable micro-film electrical testing device according to the present utility model;
FIG. 3 is a schematic diagram of an internal connection circuit of a portable micro-film electrical testing device according to the present utility model.
Reference numerals:
cover plate 001, man-machine interaction module 002, data acquisition and processing module 003, power module 004, switch 005, data export port 006, charging port 007, housing 008, detection device insertion port 009, and device to be tested 010;
a first detection port 901, a second detection port 902, a third detection port 903, a fourth detection port 904;
the first amplifier 01, the second amplifier 02, the third amplifier 03, the fourth amplifier 04a, the fifth amplifier 04b, the analog-to-digital conversion unit 05a, the second analog-to-digital conversion unit 05b, the third analog-to-digital conversion unit 05c, the fourth digital-to-analog conversion unit 05d, the first-shot voltage-following unit 06a, the second-shot voltage-following unit 06b, the third-shot voltage-following unit 06c, the fourth-shot voltage-following unit 06d, the fifth-shot voltage-following unit 06e, the analog-to-digital conversion unit 07, and the gain switching network 08.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the utility model, are intended for purposes of illustration only and are not intended to be limiting
The utility model discloses a portable micro-film electrical testing device, as shown in figures 1-3, comprising: the device comprises a human-computer interaction module 002, a data acquisition and processing module 003 and a power module 004;
the human-computer interaction module 002 is arranged on the outer surface of the testing device and is integrated with the data acquisition and processing module 003 and the power module 004; the data acquisition and processing module 003 is connected with the power module 004 and the human-computer interaction module 002 through a circuit.
In implementation, the data acquisition and processing module 003 receives the command of the man-machine interaction module 002, and completes data acquisition and processing under the energy supply of the power supply module 004.
The data processing module comprises at least four detection circuits, one end of each detection circuit is connected with a region to be detected, at least three detection circuits are provided with built-in shift switches, and the data processing module comprises at least four detection circuits, wherein at least three detection circuits are provided with built-in shift switches;
the detection circuit is also provided with an amplifier, and the input end and the output end of the amplifier are connected with the region to be detected through a built-in shift switch.
Specifically, the detection circuit outputs a control instruction to the region to be detected or collects an electric signal of the region to be detected through gear switching of the built-in gear shifting switch, so that the control function and the detection function conversion of the detection circuit are realized.
When the detection circuit is implemented, the built-in shift switch is matched with the amplifier, the built-in shift switch can realize the reverse direction of the information transmission direction of the amplifier and the region to be detected, and the control function and the detection function conversion of the detection circuit are realized.
When the control signal is implemented, the input end of the amplifier inputs the control signal, the output end of the amplifier is communicated with the region to be tested, the amplifier amplifies the control signal and outputs the amplified control signal, such as voltage, to provide voltage for the region to be tested, and the control function is realized; the built-in shift switch is switched to realize the communication between the input end of the amplifier and the region to be detected, and the output end outputs the detection signal amplified by the amplifier to realize the detection function.
It should be noted that, the present human-computer interaction module adopts the automatic control program and device (such as a single-chip microcomputer and control program control thereof) commonly used in the field to implement the conversion from a manual instruction (usually a digital signal) to an instruction that can be identified and executed by the data acquisition and processing module.
It should be noted that, this novel built-in shift switch adopts the built-in shift switch that is commonly used in the art and matches corresponding program control (e.g. singlechip control), realizes built-in shift switch gear conversion according to the instruction of man-machine interaction module.
Compared with the prior art, the utility model has the advantages that the built-in shift switch is arranged at the joint of the amplifier and the area to be detected, so that the amplifier can amplify both the detection signal of the detection area and the control signal of the detection area, the detection circuit can collect and control the detection signal of the detection area according to the requirements, compared with the prior art, which has the same function, an independent detection and collection circuit is required, the circuit structure is simplified, the testing of the field effect transistor device and the four-probe thermoelectric model device can share one set of circuit, the volume is reduced, and the carrying is convenient.
Specifically, the data acquisition and processing module includes: the first detection circuit, the second detection circuit, the third detection circuit and the fourth detection circuit are sequentially arranged; the data acquisition and processing module further comprises a storage control unit, and the man-machine interaction module manual instruction is converted into a digital instruction; the first detection circuit, the second detection circuit, the third detection circuit and the fourth detection circuit are provided with digital-to-analog conversion units which are communicated with the input end of the amplifier and the storage control unit, the digital-to-analog conversion units convert the digital instruction output by the storage control unit into an analog instruction and amplify the analog instruction through the amplifier to obtain a control instruction of an amplified area to be detected, the control instruction is used for controlling the area to be detected, and the control instruction is used for providing voltage for the area to be detected and exerting a control function of the area to be detected.
Preferably, the data acquisition and processing module further comprises a digital-to-analog conversion unit communicated with the storage control unit; the first detection circuit, the second detection circuit, the third detection circuit and the fourth detection circuit are provided with a radial voltage dividing unit, the input end of the radial voltage dividing unit is communicated with the digital-to-analog conversion unit, and the output end of the radial voltage dividing unit is communicated with the digital-to-analog conversion unit.
When the method is implemented, the analog instruction output by the digital-to-analog conversion unit is input into the analog-to-digital conversion unit after being transmitted along with the voltage division unit, is converted into a digital signal and is input into the storage control unit; the storage control unit can adjust the analog signal instruction actually output by the digital-to-analog conversion unit by adjusting the output instruction to the digital-to-analog conversion unit, so that feedback control is realized, and the control precision is improved; meanwhile, the emission follower voltage dividing unit plays a role in removing interference and reducing damage of the high voltage to the analog-digital conversion unit.
Compared with the prior art, the novel injection-following voltage dividing unit can reduce the requirement for the output current of the upper-level circuit, namely, the input impedance is improved; the driving capability of the subsequent circuit is increased, and the output impedance is reduced.
It should be noted that, the storage control unit receives the instruction of the man-machine interaction function and converts the instruction into a digital instruction, and the feedback control to the digital-to-analog conversion unit can be realized by conventional software and hardware (such as control of a single chip microcomputer), and the improvement of the storage control unit and the control program is not an improvement point of the utility model.
Specifically, the data acquisition and processing module further includes a first detection port 901, a second detection port 902, a third detection port 903, and a fourth detection port 904 that are sequentially arranged; the first detection port 901 is in communication with a first detection circuit, the second detection port 902 is in communication with a second detection circuit, the third detection port 903 is in communication with a third detection circuit, and the fourth detection port 904 is in communication with a fourth detection circuit.
When the detection circuit is implemented, the detection circuit is communicated with the corresponding acquisition port, and detection or control is realized on the area to be detected, which is contacted or communicated with the acquisition port.
Preferably, one amplifier is arranged in the first detection circuit, the second detection circuit and the third detection circuit; the second detection circuit and the third detection circuit are provided with built-in shift switches matched with the amplifier; the first detection circuit is provided with a first amplifier 01, the input end of the first amplifier 01 is communicated with a digital-to-analog conversion unit 05a of an analog-to-digital conversion unit in the first detection circuit, and the output end of the first amplifier 01 is communicated with a region to be detected corresponding to the first detection circuit; the second detection circuit is provided with a second amplifier 02, and the input end and the output end of the second amplifier 02 are communicated with a digital-to-analog conversion unit 05b of an analog-to-digital conversion unit in the second detection circuit through a built-in shift switch; the third detection circuit is provided with a third amplifier 03, and the input end and the output end of the third amplifier 03 are communicated with the digital-to-analog conversion unit 05c of the analog-to-digital conversion unit in the third detection circuit through a built-in shift switch.
Preferably, the second detection circuit and the third detection circuit are respectively provided with a built-in shift switch and an analog-to-digital conversion unit.
When the method is implemented, the analog-to-digital conversion units of the detection circuits output analog instructions, and the analog instructions are amplified by the first amplifier, the second amplifier or the third amplifier and then output control instructions to the corresponding areas to be detected, so that the areas to be detected are controlled.
Preferably, the second detection circuit is provided with a first detection branch and a first built-in shift switch, and the third detection circuit is provided with a second detection branch and a second built-in shift switch; one end of the first detection branch is connected with the output end of the second amplifier through a first built-in shift switch, and the other end of the first detection branch is communicated with the analog-to-digital conversion unit; one end of the second detection branch is connected with the output end of the third amplifier through a second built-in shift switch, and the other end of the second detection branch is communicated with the analog-to-digital conversion unit.
During implementation, the built-in shift switch is adjusted, so that the detection branches of the second detection circuit and the third detection circuit are communicated with the output end of the second amplifier 02 or the third amplifier 03, the input ends of the second amplifier 02 and the third amplifier 03 are communicated with the corresponding areas to be detected, and detection signals of the areas to be detected are collected by the amplifiers, amplified and then are input into the digital-to-analog conversion unit, and are converted into digital signals to be recognized and stored by the storage control unit.
Preferably, a first radial voltage dividing unit 06a is arranged between the first digital-to-analog conversion unit 05a and the digital-to-analog conversion unit 07; a second radial voltage dividing unit 06b is arranged between the second digital-to-analog conversion unit 05b and the digital-to-analog conversion unit 07; a third radial voltage-dividing unit 06c is arranged between the third digital-to-analog conversion unit 05c and the digital-to-analog conversion unit 07; the emission follower voltage dividing unit plays a role in removing interference and reducing damage of the high voltage to the analog-to-digital conversion unit.
Preferably, the fourth detection circuit is provided with a plurality of amplifiers, and the built-in shift switch and the digital-to-analog conversion unit are respectively provided with one amplifier.
Specifically, the fourth detection circuit is provided with a third built-in shift switch, the amplifier in the fourth detection circuit comprises a fourth amplifier 04a and a fifth amplifier 04b which are connected in series, the input end of the fifth amplifier 04b is connected with the output end of the digital-to-analog conversion unit 07, the output end of the fifth amplifier 04b is communicated with the input end of the fourth amplifier 04a through the third built-in shift switch, and the output end of the fourth amplifier 04a is communicated with the region to be detected through the third built-in shift switch.
In implementation, the fifth amplifier 04b receives an input instruction from the digital-to-analog conversion unit, provides an input voltage for the fourth amplifier 04a, and provides a control voltage for the region to be detected after the fourth amplifier 04a amplifies the input voltage.
Preferably, the fourth detection circuit is provided with a third detection branch; one end of the third detection branch is connected with the fourth amplifier 04a through a third built-in shift switch, and the other end of the third detection branch is connected with the digital-to-analog conversion unit 07.
In implementation, the built-in shift switch is adjusted, so that the input end of the fourth amplifier 04a is communicated with the region to be detected corresponding to the fourth detection circuit, the output end of the fourth amplifier 04a is communicated with the fourth emission follow-up voltage dividing unit 06d of the analog-to-digital conversion unit, detection signals of the region to be detected are collected by the fourth amplifier 04a, amplified and then input into the analog-to-digital conversion unit 07, and the signals are converted into digital signals to be recognized and stored by the storage control unit, so that the detection function of the fourth detection circuit is exerted.
Preferably, a fifth emission voltage-following unit 06e is disposed between the output end of the fourth amplifier 04a and the analog-digital conversion unit 07, and a fifth emission voltage-following unit 06e is disposed between the fourth digital-analog conversion unit 05d and the analog-digital conversion unit 07, which can remove interference and reduce damage of the high voltage analog-digital conversion unit.
Preferably, the output end and the input end of the fourth amplifier are connected in parallel with a gain switching network, which is helpful for realizing current measurement with different measuring ranges, especially when the output end and the input end of the fourth amplifier 04a are switched in control and detection.
Compared with the prior art, the utility model adopts the high-precision analog-to-digital conversion unit to sample data; performing voltage generation by adopting a digital-to-analog conversion unit; adopting a special current-voltage conversion circuit to perform signal transmission; the series amplifier structure is adopted to carry out multiple filtering and signal processing, so that the integrity of the acquired signals is ensured, and the high-precision and signal stability are realized.
Preferably, the gain switching network adopts an open loop gain structure, and different gains are switched by using a built-in switch, so that different current measurement ranges are automatically switched according to the selection of a measurement mode.
Specifically, the man-machine interaction module can select a capacitive screen and a matched input program thereof.
As shown in fig. 1, the thin film electrical test apparatus further includes a switch 005, a data-out port 006, a charging port 007, a detection device insertion port 009, a cover plate 001, and a housing 008 integrated at the side thereof.
Specifically, cover 001 and housing 008 form a thin film electrical test device enclosure for integrated placement of all of the above components.
Specifically, the charging port 007 is disposed on a side wall of the housing 008 and is in communication with the power module 004, and can be used for charging a power source.
Specifically, the data export port 006 is disposed on a side wall of the housing 008 and is in communication with the data acquisition and processing module 003, and can export the collected data in the form of an external USB port.
Specifically, the detection device insertion port 009 is provided with a first detection port 901, a second detection port 902, a third detection port 903, and a fourth detection port 904.
Preferably, vents (not shown in the figures) are provided in the side walls of the housing 008 for heat dissipation from the power module 004, the data acquisition and processing module 003.
Specifically, the power module may be a lithium battery.
Aiming at the electrical test requirement of the micro thin film, the utility model provides a three-terminal transistor test or four-probe conductivity test mode; specifically, a three-terminal transistor test or a four-probe conductivity test mode can be selected in the man-machine interaction module.
Specifically, the four-probe conductivity test mode, as shown in the solid line areas of fig. 2 and 3, includes:
(1) Taking four points on the same surface of the element to be tested as a region to be tested in sequence in a straight line manner, and communicating the four points with a first detection port 901, a second detection port 902, a third detection port 903 and a fourth detection port 904 in sequence;
(2) Adjusting the built-in shift switch so that the output end of the second amplifier 02 is communicated with the analog-to-digital conversion unit 07, and the input end of the second amplifier 02 is communicated with the second detection port 902; an output end of the third amplifier 03 is communicated with the analog-to-digital conversion unit 07, and an input end of the third amplifier 03 is communicated with the third detection port 903; the output end of the fourth amplifier 04a is communicated with a fourth emission following voltage dividing unit 06d, and the input end of the fourth amplifier 04a is communicated with a fourth detection port 904;
(3) The digital-to-analog conversion unit in the first detection circuit is controlled to output a control signal, the range is 0-10 mA, the precision is 0.01mA, a loop is formed through the fourth detection circuit, and the voltage U of the second detection port 902 and the third detection port 903 is detected by the second detection circuit and the third detection circuit 23 The resistivity is then calculated according to prior art methods.
Specifically, the three-terminal transistor test mode, as shown in fig. 2 and 3 in the dotted line area, includes:
(1) Taking a source, a gate and a drain of an element to be tested (transistor) as a region to be tested, and sequentially communicating with a second detection port 902, a third detection port 903 and a fourth detection port 904;
(2) Adjusting the built-in shift switch so that the input end of the second amplifier 02 is communicated with the second digital-to-analog conversion unit 5b, and the output end of the second amplifier 02 is communicated with the second detection port 902; the input end of the third amplifier 03 is communicated with the third digital-to-analog conversion unit 05c, and the output end of the third amplifier is communicated with the third detection port 903; the output end of the fourth amplifier 04a is communicated with the fourth detection port 904, the input end of the fourth amplifier 04a is communicated with the output end of the fifth amplifier 04b, and the input end of the fifth amplifier 04b is communicated with the fourth digital-to-analog conversion unit 05 d;
(3) The digital-to-analog conversion units in the second detection circuit, the third detection circuit and the fourth detection circuit are controlled to output control signals, voltages are respectively applied to the source electrode, the drain electrode and the grid electrode of the original to be detected, and leakage current measurement with different measuring ranges can be realized by adjusting the gear of the gain switching network 08; the source voltage (S corresponds to the voltage in the figure 2) is in the range of-20 to 20V, and the precision is 0.01V; the range of the grid voltage (G-pole corresponding voltage in the figure 2) is-20V, and the precision is 0.01V; the drain voltage (D-pole corresponding voltage in figure 2) ranges from-6 to 6V with an accuracy of 0.01V.
It should be noted that, the fourth detection circuit is connected in series with the fifth amplifier 04b by providing the fourth amplifier 04a, which is easier to realize accurate control of the drain side voltage than one amplifier, and is helpful for improving the detection accuracy.
Compared with the prior art, the device provided by the utility model can be used for testing the basic electrical properties of a photodiode, a resistor, a field effect transistor device and a four-probe thermoelectric model device, and can be connected with various types of sensors to realize signal testing on temperature, substances and the like and is used for monitoring human health and biomedical aspects in real time by integrating the man-machine interaction module, the data acquisition and processing module, the power module and the test socket on the same device.
The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model.
Claims (10)
1. A portable miniature thin film electrical testing device, comprising: the system comprises a man-machine interaction module, a data acquisition and processing module and a power module;
the man-machine interaction module is arranged on the outer surface of the testing device, the data acquisition and processing module and the power module are integrated in the electrical testing device, and the data acquisition and processing module is connected with the power module and the man-machine interaction module through circuits;
the data acquisition and processing module comprises at least four detection circuits, wherein at least three detection circuits are provided with built-in shift switches;
the detection circuit is also provided with an amplifier, and the input end and the output end of the amplifier are connected with the area to be detected through a built-in shift switch of the detection circuit.
2. The electrical testing device of claim 1, wherein the four detection circuits are a first detection circuit, a second detection circuit, a third detection circuit, and a fourth detection circuit and are arranged in sequence; the data acquisition and processing module further comprises a storage control unit; the first detection circuit, the second detection circuit, the third detection circuit and the fourth detection circuit are further provided with a digital-to-analog conversion unit which is communicated with the input end of the amplifier and the storage control unit.
3. The electrical testing device of claim 2, wherein the data acquisition and processing module further comprises an analog-to-digital conversion unit in communication with the memory control unit; and the first detection circuit, the second detection circuit, the third detection circuit and the fourth detection circuit are also provided with an emission-following voltage dividing unit, the input end of the emission-following voltage dividing unit is communicated with the digital-to-analog conversion unit, and the output end of the emission-following voltage dividing unit is communicated with the analog-to-digital conversion unit.
4. The electrical testing device of claim 3, wherein the data acquisition and processing module further comprises a first detection port, a second detection port, a third detection port, and a fourth detection port; the first detection port, the second detection port, the third detection port and the fourth detection port are sequentially arranged; the first detection port is communicated with the first detection circuit, the second detection port is communicated with the second detection circuit, the third detection port is communicated with the third detection circuit, and the fourth detection port is communicated with the fourth detection circuit.
5. The electrical testing device according to claim 4, wherein the first detection circuit is provided with a first amplifier, an input end of the first amplifier is communicated with the analog-to-digital conversion unit in the first detection circuit, and an output end of the first amplifier is communicated with a region to be detected corresponding to the first detection circuit; the second detection circuit is provided with a second amplifier, and the input end and the output end of the second amplifier are communicated with an analog-to-digital conversion unit in the second detection circuit through a first built-in shift switch; the third detection circuit is provided with a third amplifier, and the input end and the output end of the third amplifier are communicated with the analog-to-digital conversion unit in the third detection circuit through a second built-in shift switch.
6. The electrical testing device according to claim 5, wherein the second detection circuit and the third detection circuit are provided with one built-in shift switch and one built-in analog-to-digital conversion unit.
7. The electrical testing device of claim 6, comprising: the second detection circuit is provided with a first detection branch and a first built-in shift switch, and the third detection circuit is provided with a second detection branch and a second built-in shift switch; one end of the first detection branch is connected with the output end of the second amplifier through a first built-in shift switch, and the other end of the first detection branch is communicated with the analog-to-digital conversion unit; one end of the second detection branch is connected with the output end of the third amplifier through a second built-in shift switch, and the other end of the second detection branch is communicated with the analog-to-digital conversion unit.
8. The electrical testing device according to claim 7, wherein a plurality of amplifiers are provided in the fourth detection circuit, and one of the built-in shift switch and the analog-to-digital conversion unit is provided.
9. The electrical testing device according to claim 8, wherein the fourth detection circuit is provided with a third built-in shift switch, the amplifier in the fourth detection circuit comprises a fourth amplifier and a fifth amplifier which are connected in series, the input end of the fifth amplifier is connected with the output end of the digital-to-analog conversion unit, the output end of the fifth amplifier is communicated with the input end of the fourth amplifier through the third built-in shift switch, and the output end of the fourth amplifier is communicated with the area to be detected through the third built-in shift switch.
10. The electrical testing device according to claim 9, wherein the fourth detection circuit is provided with a third detection branch, one end of the third detection branch is connected to the fourth amplifier through a third built-in shift switch, and the other end is connected to the digital-to-analog conversion unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202322104889.5U CN220525942U (en) | 2023-08-07 | 2023-08-07 | Portable miniature film electricity testing arrangement |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202322104889.5U CN220525942U (en) | 2023-08-07 | 2023-08-07 | Portable miniature film electricity testing arrangement |
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