CN212811669U - Machine type identification device and system - Google Patents
Machine type identification device and system Download PDFInfo
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- CN212811669U CN212811669U CN202021906251.3U CN202021906251U CN212811669U CN 212811669 U CN212811669 U CN 212811669U CN 202021906251 U CN202021906251 U CN 202021906251U CN 212811669 U CN212811669 U CN 212811669U
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Abstract
The utility model provides a model identification device and model identification system, which belongs to the field of model identification, the model identification circuit and the access port of the control chip of the key circuit are multiplexed, when the model is identified, the model identification circuit is electrified, at the moment, the model identification circuit sends a level signal group to the control chip to identify the model, the number of the ports of the control chip is reduced, the model identification is completed, compared with the prior art, a pull-up resistor and a pull-down resistor are adopted, the additional increase is needed, when the model identification is realized, the port number requirement of the control chip is reduced, simultaneously, different model identification is not needed to be distinguished by different level signals generated by the pull-up resistor and the pull-down resistor, the identification is carried out through the conduction condition of the model identification circuit and the key identification port, and the phenomenon that the model number is too large is avoided, the pull-up resistors and pull-down resistors of different models are not high in level signal distinguishing precision during design, and therefore misjudgment is caused.
Description
Technical Field
The utility model relates to a model identification field, concretely relates to model recognition device and system.
Background
The model identification method in the prior art comprises the following steps: the model identification circuit on the electric control mainboard corresponds to different models and is designed through different pull-up resistors and pull-down resistors, so that the microcontroller obtains different input signals, and then detects corresponding input level conditions according to program design to achieve the purpose of model identification.
The machine type identification method in the prior art has the following defects that if a microcontroller port is added to be connected with a pull-up resistor and a pull-down resistor for identification, machine type misjudgment or machine type identification can not be realized when the resistance value of the resistor fluctuates. If two microcontroller ports are added and respectively connected with two groups of pull-up resistors and pull-down resistors, two input levels are compared for improving the accuracy of model identification, and because the resistance of the resistors fluctuates, when the number of models is too large, the two input levels can represent different models, and at the moment, only model identification faults can be judged, and the specific models of the models cannot be distinguished. If more than three microcontroller ports are added, the number of input ports of the microcontroller is excessively used, in some circuit designs, the model of the microcontroller needs to be replaced, and the number of the input ports is increased to meet the use requirement of model identification, so that the total cost of the electronic control mainboard is increased.
The above problems are currently in need of solution.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a model identification circuit is provided to the realization improves the precision of model discernment and reduces the use quantity of control chip port when carrying out model discernment to the electronic product that has keying circuit.
The utility model provides a technical scheme that its technical problem adopted is: there is provided a type identification circuit including:
a key circuit and a model identification circuit;
the key circuit is electrically connected with the key identification port of the control chip;
the machine type identification circuit is electrically connected with the key identification port;
the model identification circuit is suitable for providing a level signal group to the control chip when being powered on.
Further, the model identification circuit is electrically connected with at least one of the key identification ports.
Further, the model identification circuit comprises a plurality of identification units;
the plurality of identification units are all connected into the key identification port;
and the plurality of identification units are sequentially electrified and then send the level signal group to the control chip.
Furthermore, each identification unit comprises a level transmitting circuit and a pull-up resistor, wherein the number of the level transmitting circuits is not more than the total number of the key identification ports;
all the level transmitting circuits in each identification unit are connected in parallel and then are pulled high through pull-up resistors, one end of each level transmitting circuit is electrically connected with the power supply end, and the other end of each level transmitting circuit is connected into the key identification port.
Further, the level transmitting circuit includes a diode;
the anode of the diode is electrically connected with the pull-up resistor, and the cathode of the diode is electrically connected with the corresponding key identification port.
Furthermore, the number of the identification units is n, and n is more than or equal to 1.
Furthermore, the number of the key identification ports is m, and m is more than or equal to 2.
Further, the total number of model types represented by the level signal group is 2m*n-1。
Further, the model identification circuit further comprises a plug-in connector;
the key circuit and the model identification circuit are suitable for being inserted into the insertion groove of the control chip through the insertion connector.
The utility model also provides a model identification system, which comprises a control chip and the model identification device;
the control chip is suitable for judging the type of the machine according to the received level signal group.
The utility model has the advantages that: the model identification circuit and the access port of the control chip of the key circuit are multiplexed, when the model is identified, the model identification circuit is electrified, the level signal group is sent to the control chip by the model identification circuit to identify the model, the number of the ports of the control chip is reduced, and the model identification is completed, compared with the prior art, a pull-up resistor and a pull-down resistor are adopted, the additional increase is needed, when the model identification is realized, the port number requirement of the control chip is reduced, meanwhile, different model types are not needed to be distinguished by different level signals generated by the pull-up resistor and the pull-down resistor, but are identified by the conduction condition of the model identification circuit and the key identification port, and the situation that when the number of the model is too large, the distinguishing precision of the level signals of the pull-up resistor and the pull-down resistor of different model is not high when the model is designed is avoided, causing a false positive to occur.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic block diagram of a display screen control circuit according to an embodiment of the present invention.
Fig. 2 is a circuit diagram of a model identification device of 3 key identification ports and an identification unit according to an embodiment of the present invention.
Fig. 3 is a circuit diagram of a key identification device of model a according to an embodiment of the present invention.
Fig. 4 is a circuit diagram of a key identification device of model B according to an embodiment of the present invention.
Fig. 5 is a schematic block diagram of a model identification device of 3 key identification ports and n identification units according to an embodiment of the present invention.
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.
Referring to fig. 1, the present invention provides a display screen control circuit, which includes an electric control main board and a display control panel.
The display control panel is arranged in the display screen and comprises a key circuit and a display screen driver. The display control panel is electrically connected with the electric control main board. Specifically, the key circuit sends key information to the control main board, and the electronic control main board sends a driving instruction to the display screen driver according to the key information so as to display information represented by the keys on the display screen.
The utility model provides a model identification device. The method comprises the following steps: a key circuit and a model identification circuit; the key circuit is electrically connected with the key identification port of the control chip; the machine type identification circuit is electrically connected with the key identification port; the model identification circuit is suitable for providing a level signal group to the control chip when being powered on.
It should be noted that the control chip is disposed on the electronic control main board, and the key circuit and the model identification circuit are disposed on the display control board. The electrification of the machine type identification circuit is controlled through the control chip.
The model identification circuit can be powered on through a plurality of ports of the control chip, or the model identification type is sent to the drive chip through one port of the control chip to supply power to the model identification circuit, wherein the model of the drive chip is 74163.
Referring to fig. 2, fig. 2 is a schematic diagram of a model identification device according to the present invention. The device comprises a key circuit consisting of a high-level VCC, a pull-up resistor R6, a pull-up resistor R5, keys 1-6 and diodes D1-D6, and a model identification circuit consisting of keys 7-9, diodes D7-D9 and a pull-up resistor R7. When a machine type needs to be determined, the key which does not need to be pressed is removed, the key is conducted with the key through a lead, and when the machine type identification device is powered on, the identification is carried out. When the control chip identifies the model, level information corresponding to each model is prestored, for example, as shown in fig. 2, the level information may be any one of 001,010,100,110,101,011,111, and the control chip stores the model corresponding to the seven types of level information, so that when the control chip receives the level information, the control chip compares the level information with the prestored level information, screens out the model corresponding to the level information, and controls the device according to a control program corresponding to the model. Therefore, the control chip adopts the same control program when controlling different display screens. And different program files do not need to be burnt according to different display control panels, so that the complexity of product production is reduced.
In this embodiment, each model is determined by different connection modes between the model identification circuit and the KEY identification ports, as shown in fig. 3, the KEY identification ports are COm1, COm2 and COm3, and model a is represented by KEY3, COm3 and COm2 port connections. As shown in fig. 4, the connection with COm3 port by KEY3 indicates proceed with B. KEY3 is connected to the control chip. It should be noted that the model identification circuit is electrically connected to at least one of the key identification ports, so that the model identification circuit in fig. 2 can represent at most 7 models.
Referring to fig. 5, in the present embodiment, the model identification circuit includes a plurality of identification units; the plurality of identification units are all connected into the key identification port; and the plurality of identification units are sequentially electrified and then send the level signal group to the control chip. That is, the model identification circuit in fig. 5 includes a plurality of model identification circuits as shown in fig. 2 connected in parallel, and the model identification circuit in fig. 2 serves as one identification means.
Each identification unit comprises a level transmitting circuit and a pull-up resistor, wherein the number of the level transmitting circuits is not more than the total number of the key identification ports; all the level transmitting circuits in each identification unit are connected in parallel and then pulled high through pull-up resistors, one end of the KEY3 is electrically connected with the power supply end, namely, the KEY3 is powered on, and the other end of the KEY is connected to the KEY identification port. The level transmitting circuit includes a diode; the anode of the diode is electrically connected with the pull-up resistor, and the cathode of the diode is electrically connected with the corresponding key identification port.
It should be noted that, the model identification device provided in this embodiment may be, but is not limited to, the number of the identification units is n, where n is greater than or equal to 1, and the number of the key identification ports is m, where m is greater than or equal to 2. The total number of model types represented by the level signal group is 2m*n-1. Therefore, the model identification circuit in fig. 2 can represent 7 models, and the model identification circuit in fig. 5 can represent 2 models3n1 model.
The embodiment of the utility model also provides a model identification system, which comprises a control chip and the model identification device;
the control chip is suitable for judging the type of the machine according to the received level signal group.
In summary, the present invention provides a machine type identification device and a machine type identification system, wherein the access ports of the machine type identification circuit and the control chip of the key circuit are multiplexed, when the machine type is identified, the machine type identification circuit is powered on, and the machine type identification circuit sends a level signal group to the control chip to identify the machine type, thereby reducing the number of ports used by the control chip, and completing the machine type identification, compared with the prior art, the number of ports used by the control chip is reduced by adopting a pull-up resistor and a pull-down resistor, which need to be additionally increased, when the machine type identification is to be realized, the port number requirement of the control chip is reduced, meanwhile, different machine types are not required to be distinguished by generating different level signals through the pull-up resistor and the pull-down resistor, but are identified by the conduction condition of the machine type identification circuit and the key identification port, and the phenomenon that the number of, the pull-up resistors and pull-down resistors of different models are not high in level signal distinguishing precision during design, and therefore misjudgment is caused.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. A model identification device, comprising:
a key circuit and a model identification circuit;
the key circuit is electrically connected with the key identification port of the control chip;
the machine type identification circuit is electrically connected with the key identification port;
the model identification circuit is suitable for providing a level signal group to the control chip when being powered on.
2. The model identification device of claim 1,
the model identification circuit is electrically connected with at least one of the key identification ports.
3. The model identification device of claim 1,
the model identification circuit comprises a plurality of identification units;
the plurality of identification units are all connected into the key identification port;
and the plurality of identification units are sequentially electrified and then send the level signal group to the control chip.
4. The model identification device of claim 3,
each identification unit comprises a level transmitting circuit and a pull-up resistor, wherein the number of the level transmitting circuits is not more than the total number of the key identification ports;
all the level transmitting circuits in each identification unit are connected in parallel and then are pulled high through pull-up resistors, one end of each level transmitting circuit is electrically connected with the power supply end, and the other end of each level transmitting circuit is connected into the key identification port.
5. The model identification device of claim 4,
the level transmitting circuit includes a diode;
the anode of the diode is electrically connected with the pull-up resistor, and the cathode of the diode is electrically connected with the corresponding key identification port.
6. The model identification device of claim 3,
the number of the identification units is n, and n is more than or equal to 1.
7. The model identification device of claim 6,
the number of the key identification ports is m, and m is more than or equal to 2.
8. The model identification device of claim 7,
the total number of model types represented by the level signal group is 2m*n-1。
9. The model identification device of claim 1,
the machine type identification circuit also comprises a plug-in connector;
the key circuit and the model identification circuit are suitable for being inserted into the insertion groove of the control chip through the insertion connector.
10. A model identification system, comprising a control chip and the model identification device according to any one of claims 1 to 9;
the control chip is suitable for judging the type of the machine according to the received level signal group.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021906251.3U CN212811669U (en) | 2020-09-03 | 2020-09-03 | Machine type identification device and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021906251.3U CN212811669U (en) | 2020-09-03 | 2020-09-03 | Machine type identification device and system |
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| CN212811669U true CN212811669U (en) | 2021-03-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114267284A (en) * | 2021-12-31 | 2022-04-01 | 广东美的厨房电器制造有限公司 | Display control circuit, display device and integrated control chip |
| CN114329513A (en) * | 2021-11-29 | 2022-04-12 | 苏州浪潮智能科技有限公司 | Device, method and server for limiting external access of physical interface |
-
2020
- 2020-09-03 CN CN202021906251.3U patent/CN212811669U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114329513A (en) * | 2021-11-29 | 2022-04-12 | 苏州浪潮智能科技有限公司 | Device, method and server for limiting external access of physical interface |
| CN114329513B (en) * | 2021-11-29 | 2023-11-03 | 苏州浪潮智能科技有限公司 | Device, method and server for limiting external access of physical interface |
| CN114267284A (en) * | 2021-12-31 | 2022-04-01 | 广东美的厨房电器制造有限公司 | Display control circuit, display device and integrated control chip |
| CN114267284B (en) * | 2021-12-31 | 2024-03-22 | 广东美的厨房电器制造有限公司 | Display control circuit, display device and integrated control chip |
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