CN211698024U - Human-computer interaction device for test equipment - Google Patents
Human-computer interaction device for test equipment Download PDFInfo
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- CN211698024U CN211698024U CN201922488059.0U CN201922488059U CN211698024U CN 211698024 U CN211698024 U CN 211698024U CN 201922488059 U CN201922488059 U CN 201922488059U CN 211698024 U CN211698024 U CN 211698024U
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Abstract
The utility model discloses and provides a human-computer interaction device that small, low, the wiring is less, show abundant content of price. The input end of the input interface can be connected with a differential I2C signal and a single-ended I2C signal; the CAT9555YI chip comprises an expanded IO interface, and an I2C signal is connected with and controls a three-color LED to display different colors or even flash frequency and read the state of a key interface through the expanded IO interface included in the CAT9555YI chip; the differential I2C chip converts the I2C signal into a differential signal by PCA9615 on the main control board, and is connected to the display panel by a connecting wire, and the differential I2C chip PCA9615 on the display panel converts the differential signal into an I2C signal. The utility model discloses can be applied to the test field.
Description
Technical Field
The utility model relates to a test trade or teaching experiment platform of electronic and electrical products or equipment especially relates to a human-computer interaction device that small, low, the wiring is less, the demonstration content is abundant in the test equipment.
Background
With the rapid development of various consumer electronics products, in order to ensure the product quality, the automatic testing equipment matched with the consumer electronics products is rapidly developed, in order to enable operators/maintenance personnel in a factory to accurately judge the state of the equipment and timely make corresponding measures, the state indication is a very important part in the equipment, and in order to accurately and clearly express the power state, the running state, the fault state, the testing result of each channel and other information of a machine table, the design of a display panel is very important. In the prior art in the field, a three-color tower lamp and a small metal indicator lamp are used as an indicating unit for each state of the testing equipment, and the three-color tower lamp and the small metal indicator lamp have the following defects in different degrees: the volume is large, the price is high, the display information is less, the wiring is more, and the device is not suitable for being used in the application of test equipment with more indication states. Therefore, it is highly desirable to develop a testing device with small size, low cost, less wiring, and rich display contents, wherein a human-computer interaction panel and a circuit are important.
Disclosure of Invention
The utility model aims to solve the technical problem that overcome prior art not enough, provide a human-computer interaction device small, the price is low, the wiring is less, show abundant in content.
The utility model adopts the technical proposal that: a man-machine interaction panel and a circuit for testing equipment comprise an input interface, a differential I2C chip, a CAT9555YI chip, a three-color LED and a key interface, wherein the output end of the input interface is respectively connected with the input ends of the differential I2C chip and the CAT9555YI chip, the output end of the differential I2C chip is connected with the input end of the CAT9555YI chip, the output end of the CAT9555YI chip is respectively connected with the three-color LED and the key interface, and the input interface further comprises a working power supply for connecting and transmitting each chip.
The input interface input end can be accessed with different control signals including a differential I2C signal and a single-ended I2C signal.
The CAT9555YI chip comprises an expanded IO interface, and the I2C signal controls the three-color LED to display different colors or even flash frequency and read the state of the key interface through the connection of the expanded IO interface included in the CAT9555YI chip.
The differential I2C conversion chip converts the I2C signal into a differential signal by PCA9615 on the main control board, and is connected to the display panel by a connecting wire, and the differential I2C conversion chip PCA9615 on the display panel converts the differential signal into an I2C signal.
The utility model has the advantages that: because the utility model discloses it includes input interface, difference commentaries on classics I2C chip, CAT9555YI chip, three-colour LED, key interface, the input interface output is connected respectively the difference changes the input of I2C chip, CAT9555YI chip, the difference changes the output of I2C chip and connects the input of CAT9555YI chip, the output of CAT9555YI chip is connected respectively three-colour LED and key interface, input interface is still including inserting and each chip working power supply of transmission. The input interface input end can be accessed with different control signals including a differential I2C signal and a single-ended I2C signal. The CAT9555YI chip comprises an expanded IO interface, and the I2C signal controls the three-color LED to display different colors or even flash frequency and read the state of the key interface through the connection of the expanded IO interface included in the CAT9555YI chip. The differential I2C conversion chip converts the I2C signal into a differential signal by PCA9615 on the main control board, and is connected to the display panel by a connecting wire, and the differential I2C conversion chip PCA9615 on the display panel converts the differential signal into an I2C signal. Therefore, the utility model is a man-machine interaction device with small volume, low price, less wiring and rich display content.
Drawings
FIG. 1 is a schematic diagram of a control block of the present invention;
FIG. 2 is a schematic diagram of a typical application of PCA 9615;
FIG. 3 is a schematic block diagram of a CAT9555YI chip application;
FIG. 4 is a circuit diagram of the input interface of FIG. 1;
FIG. 5 is a circuit diagram of the differential conversion I2C of FIG. 1;
FIG. 6 is a circuit schematic of CAT9555YI of FIG. 1;
fig. 7 is a schematic circuit diagram of the LED of fig. 1.
Detailed Description
As shown in fig. 1 to 7, a human-computer interaction device for a testing apparatus includes an input interface, a differential I2C chip, a CAT9555YI chip, a three-color LED, and a key interface, wherein output terminals of the input interface are respectively connected to input terminals of the differential I2C chip and the CAT9555YI chip, an output terminal of the differential I2C chip is connected to an input terminal of the CAT9555YI chip, an output terminal of the CAT9555YI chip is respectively connected to the three-color LED and the key interface, and the input interface further includes a working power supply for connecting and transmitting each chip.
The input interface input end can be accessed with different control signals including a differential I2C signal and a single-ended I2C signal.
The CAT9555YI chip comprises an expanded IO interface, and the I2C signal controls the three-color LED to display different colors or even flash frequency and read the state of the key interface through the connection of the expanded IO interface included in the CAT9555YI chip.
The differential I2C conversion chip converts the I2C signal into a differential signal by PCA9615 on the main control board, and is connected to the display panel by a connecting wire, and the differential I2C conversion chip PCA9615 on the display panel converts the differential signal into an I2C signal.
Some technical terms in this embodiment are labeled as follows:
A. LED: a Light-Emitting Diode (LED) is a semiconductor electronic component that can convert electrical energy into Light energy;
B. I2C: the I2C bus is a simple, bi-directional two-wire synchronous serial communications bus developed by Philips corporation;
C. differential signaling: the differential signal is a value representing the difference between two physical quantities. The differential signal is also called differential mode signal;
D. IC: an integrated circuit (integrated circuit) is a type of microelectronic device or component;
E. IO: Input/Output (Input/Output).
In this embodiment, the whole display panel is composed of an input interface, a differential I2C conversion chip, a CAT9555YI chip, a three-color LED, and a key interface. The control signal is accessed through the input interface, and the control signal can select a single-ended I2C signal or a differential I2C signal; I2C expands the IO port through CAT9555 chip, and IO control LED shows different colours and even the frequency of shining, also can read outside button state. The following are distinguished:
1. input interface
The control signal and the power supply are accessed from the interface, the interface is simple, and the universality of the panel is increased. Different control signals can be accessed through the interface, and a differential I2C signal and a single-ended I2C signal can be accessed.
2. Differential I2C conversion chip
The main control board converts the I2C signal into a differential signal by PCA9615, and the differential signal is connected to the display panel by a wire, and the display panel converts the differential signal into an I2C signal by a differential conversion I2C chip PCA 9615. The differential signal transmission has the advantages of strong anti-interference capability, capability of effectively inhibiting electromagnetic interference and very good long-distance transmission effect.
3. IO expansion chip CAT9555YI
As shown in fig. 3, IO is expanded on an LED panel by using I2C through CAT9555YI, one path of I2C can hang 8 CAT9555YI chips, each chip can expand 16 IO ports, that is, one path of I2C can expand 128 IO ports at most through CAT9555YI chips, and the IO requirements of all test devices can be completely met.
4. Key interface
Through the interface, external keys can be connected, and CAT9555YI can read the state of the external keys and then judge the state of the keys through a program, thereby triggering corresponding actions.
5. Circuit arrangement
J1 is the power supply and control interface of the whole panel, and the very common IDC connector is adopted, so that the universality is greatly increased;
u1 is PCA9615 to convert the differential signal to an I2C signal;
u2 and U3 are CAT9555YI, are used for expanding IO port, and the user can suitably increase and decrease the quantity according to the IO demand of self demand.
4. The LEDs in the figure are indicator lights of the states of four channels (Slot 1-Slot 4) and the state of the whole machine (Status), respectively.
In the embodiment, the PCA9615 and CAT9555YI chips are used by the whole human-computer interaction panel to realize the function of controlling the LED display by the I2C. By using the implementation mode, a user can increase or decrease the number of CAT9555YI chips and LEDs according to the requirement, the design of the LED panel is rapidly realized, and the control program is more concise and efficient due to the implementation mode.
The LED panel in the embodiment uses a very common interface, so that wiring is simpler; the design of the panel is for 4-channel test equipment, and 2-channel and 4-channel compatibility can be realized by not welding LEDs of the Slot2 and the Slot4 or shielding the Slot2 and the Slot 4.
In this embodiment, a low-cost and simple control scheme is used to realize accurate control of the LED panel, a high-cost-performance human-computer interaction panel implementation scheme is provided for the test equipment, and compatibility of common 2-channel/4-channel parallel test equipment is realized, the method is as follows:
1. the display LED and the button interface are arranged on the same PCB, so that high integration of a man-machine interaction panel is realized, the cost is reduced, the size is reduced, the wiring is simple, and the maintenance and the replacement are convenient;
2. the PCA9615 chip is used for converting a differential I2C signal into a single-ended I2C signal, the anti-interference capability of a control signal is enhanced, and the problem of unstable long-distance transmission between a host and a man-machine interaction panel is solved;
3. the CAT9555YI chip is used for expanding an I2C bus into an IO port to control the on/off, color and flashing frequency of the LED, rich state display is provided, meanwhile, the IO port can be used for reading the state of the button, interaction is realized, and the following advantages are realized:
1. the display and the button are highly integrated, the cost is low, the size is small, the wiring is simple, and the maintenance is convenient.
2. The system can adapt to long-distance transmission between a host and human-computer interaction, can flexibly support 2 channels/4 channels, can expand the human-computer interaction of 6 channels/8 channels of test equipment, and has good compatibility and high universality.
3. The interface is succinct, and control is simple, can show different states through the combination of various parameters such as LED bright and go, colour, the frequency of twinkling and shining. Thereby realizing large-scale application and popularization.
Claims (4)
1. A human-computer interaction device for test equipment is characterized in that: the three-color LED touch screen comprises an input interface, a differential I2C chip, a CAT9555YI chip, a three-color LED and a key interface, wherein the output end of the input interface is respectively connected with the input ends of the differential I2C chip and the CAT9555YI chip, the output end of the differential I2C chip is connected with the input end of the CAT9555YI chip, the output end of the CAT9555YI chip is respectively connected with the three-color LED and the key interface, and the input interface further comprises working power supplies for connecting and transmitting the chips.
2. The human-computer interaction device for the test equipment according to claim 1, characterized in that: the input interface input end can be accessed with different control signals including a differential I2C signal and a single-ended I2C signal.
3. The human-computer interaction device for the test equipment according to claim 1, characterized in that: the CAT9555YI chip comprises an expanded IO interface, and the I2C signal controls the three-color LED to display different colors or even flash frequency and read the state of the key interface through the connection of the expanded IO interface included in the CAT9555YI chip.
4. The human-computer interaction device for the test equipment according to claim 1, characterized in that: the differential I2C conversion chip converts the I2C signal into a differential signal by PCA9615 on the main control board, and is connected to the display panel by a connecting wire, and the differential I2C conversion chip PCA9615 on the display panel converts the differential signal into an I2C signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922488059.0U CN211698024U (en) | 2019-12-31 | 2019-12-31 | Human-computer interaction device for test equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922488059.0U CN211698024U (en) | 2019-12-31 | 2019-12-31 | Human-computer interaction device for test equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211698024U true CN211698024U (en) | 2020-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922488059.0U Active CN211698024U (en) | 2019-12-31 | 2019-12-31 | Human-computer interaction device for test equipment |
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| Country | Link |
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| CN (1) | CN211698024U (en) |
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- 2019-12-31 CN CN201922488059.0U patent/CN211698024U/en active Active
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