CN216248231U - Analog signal output device for AD conversion module detection - Google Patents
Analog signal output device for AD conversion module detection Download PDFInfo
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- CN216248231U CN216248231U CN202122786554.7U CN202122786554U CN216248231U CN 216248231 U CN216248231 U CN 216248231U CN 202122786554 U CN202122786554 U CN 202122786554U CN 216248231 U CN216248231 U CN 216248231U
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- stepping motor
- conversion module
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Abstract
The utility model discloses an analog signal output device for detecting an AD conversion module, which comprises a stepping motor, a sliding or rotating rheostat, a driving device and a driving device, wherein the stepping motor is connected with the sliding or rotating rheostat; the power shaft of the stepping motor is in transmission connection with the adjusting end of the rheostat through a transmission mechanism and is used for adjusting the output value of the rheostat; two fixed sheet pins of the rheostat are respectively connected with the positive electrode and the negative electrode of the power supply, and the movable sheet pin of the rheostat is connected with the analog signal input end of the AD conversion module to be tested; the stepping motor is in communication connection with the upper computer through the driver controller. The utility model has the advantages that the testing mode of the AD converter is expanded, the voltages of different levels are generated to replace the related sensors and further serve as the input signals of the AD converter, the controllable precision of the signal source and the controllable precision of the reference value are high, various voltage output signals can be simulated, the application range is wide, and the testing quality is ensured.
Description
Technical Field
The present invention relates to a circuit detection device, and more particularly, to an analog signal output device for detecting an AD conversion module.
Background
With the development of electronic technology, pressure, tension, temperature, humidity, illumination intensity and the like of a controlled object are detected, corresponding pressure, tension, temperature, humidity and illumination intensity sensors are mostly adopted to acquire signals, and then analog signals output by the sensors are converted into digital signals through an AD conversion module to be used by a subsequent circuit. Therefore, reliability of the AD conversion module and AD conversion accuracy are important. At present, for testing of an AD conversion module, various testing environments are mostly constructed by adopting corresponding sensors; for example, pressure, tension, temperature, humidity and illumination intensity sensors are adopted to respectively build a pressure, tension, temperature, humidity and illumination intensity test environment. Therefore, one sensor corresponds to one circuit board, and due to the fact that a certain error exists in the reference value of the sensor, a quantization standard is difficult to set during testing, so that for a high-precision AD conversion module, the testing error is large, and the quality of inspection cannot be guaranteed. Meanwhile, various testing environments are built, so that manpower and financial resources are wasted, and the structure is complex.
Disclosure of Invention
The utility model aims to provide an analog signal output device for detecting an AD conversion module, which has high control precision and wide application range.
In order to achieve the purpose, the utility model can adopt the following technical scheme:
the utility model relates to an analog signal output device for detecting an AD conversion module, which comprises a stepping motor and a sliding or rotating rheostat; the power shaft of the stepping motor is in transmission connection with the adjusting end of the rheostat through a transmission mechanism and is used for adjusting the output value of the rheostat; two fixed sheet pins of the rheostat are respectively connected with the positive electrode and the negative electrode of the power supply, and the movable sheet pin of the rheostat is connected with the analog signal input end of the AD conversion module to be tested; the stepping motor is in communication connection with the upper computer through the driver controller.
Wherein: the stepping motor controller is in communication connection with the upper computer through a serial port, an RS485 bus or a CAN bus.
Wherein: the transmission mechanism is a gear transmission pair.
The utility model has the advantages that the testing mode of the AD converter is expanded, the voltages of different levels are generated to replace the related sensors and further serve as the input signals of the AD converter, the controllable precision of the signal source and the controllable precision of the reference value are high, various voltage output signals can be simulated, the application range is wide, and the testing quality is ensured.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly. In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
As shown in fig. 1, the analog signal output device for detecting an AD conversion module according to the present invention includes a stepping motor 1, a rotary rheostat 2; a power shaft of the stepping motor 1 is in transmission connection with an adjusting end knob 4 of the rotary rheostat 2 through a gear transmission pair 3 and is used for adjusting the output value of the rotary rheostat 2; two stator pins 5 and 6 of the rotary rheostat 2 are respectively connected with the anode and the cathode of a power supply E, and a rotor pin 7 of the rotary rheostat 2 is connected with an analog signal input end of an AD conversion module 8 to be tested; and a driver controller 9 of the stepping motor 1 is in communication connection with an upper computer 10 through a serial port, an RS485 or CAN bus.
During testing, different voltage input levels are set according to the requirements of the AD conversion module 8 to be tested, and voltage analog signals are output to the analog signal input end of the AD conversion module 8 to be tested through the output end (moving plate pin 7) of the rotary rheostat 2.
During testing, a rotation instruction of the stepping motor 1 is sent through the CAN bus, and the stepping motor 1 is further controlled to drive the adjusting knob 4 of the rotary rheostat 2 to rotate according to a set direction through the gear transmission pair 3; the voltage value output by the rotary rheostat 2 is controlled by the rotating angle of the stepping motor 1, and the voltage value output by the rotary rheostat 2 and the stepping motor 1 have a certain corresponding relation, namely the fixed rotating angle of the stepping motor 1 corresponds to the fixed voltage output value of the rotary rheostat 2.
Claims (3)
1. An analog signal output device for AD conversion module detection is characterized by comprising a stepping motor and a sliding or rotating rheostat; the power shaft of the stepping motor is in transmission connection with the adjusting end of the rheostat through a transmission mechanism and is used for adjusting the output value of the rheostat; two fixed sheet pins of the rheostat are respectively connected with the positive electrode and the negative electrode of the power supply, and the movable sheet pin of the rheostat is connected with the analog signal input end of the AD conversion module to be tested; the stepping motor is in communication connection with the upper computer through the driver controller.
2. The analog signal output device for AD conversion module detection according to claim 1, wherein: and the driver controller of the stepping motor is in communication connection with the upper computer through a serial port, an RS485 bus or a CAN bus.
3. The analog signal output device for AD conversion module detection according to claim 1 or 2, wherein: the transmission mechanism is a gear transmission pair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122786554.7U CN216248231U (en) | 2021-11-15 | 2021-11-15 | Analog signal output device for AD conversion module detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122786554.7U CN216248231U (en) | 2021-11-15 | 2021-11-15 | Analog signal output device for AD conversion module detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216248231U true CN216248231U (en) | 2022-04-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122786554.7U Active CN216248231U (en) | 2021-11-15 | 2021-11-15 | Analog signal output device for AD conversion module detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216248231U (en) |
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2021
- 2021-11-15 CN CN202122786554.7U patent/CN216248231U/en active Active
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