Switching circuit based on double measurement feedback devices

Abstract

The utility model provides a switching circuit based on a double-measurement feedback device, which comprises at least two signal input interfaces connected with detection equipment, each signal input interface is in signal connection with a corresponding differential receiving chip, each differential receiving chip is in signal connection with a signal processing end, the signal processing end is connected with a signal input end, and the signal input end is connected with the detection equipment. According to the utility model, the cost is obviously reduced, the mode that two sets of independent systems acquire magnetic grid position information is abandoned, one set of system is adopted to acquire information of two stations, the hardware cost is greatly reduced, and the use of a plurality of high-cost magnetic grid reading heads is also avoided; and the design and manufacturing cost of the printer is reduced fundamentally.

Description

Technical Field

[0001] This utility model relates to the field of digital inkjet printer technology, and in particular to a switching circuit based on a dual measurement feedback device for a dual-station printer system. Background Technology

[0002] In the printer industry, commonly used measurement feedback devices mainly include magnetic gratings and optical gratings. The working principle of a dual-station printer is similar to that of a conventional printer, but it adds a station switching mechanism. Specifically, when one station is performing a printing task, the controller monitors the status of both stations simultaneously. Once one station completes printing, the controller immediately triggers the station switching mechanism, allowing the other idle station to begin operation. Meanwhile, the completed station performs tasks such as material handling, cleaning, or preparation for the next print job.

[0003] Currently, the common design for switching mechanisms between dual workstations involves using two different systems to acquire the magnetic grating position information for each workstation. However, this design has the following problems:

[0004] (1) High cost: Using two independent systems to obtain magnetic grid position information increases the design and manufacturing cost of the printer.

[0005] (2) Information synchronization problem: Information synchronization between the two systems is relatively complex and can easily lead to inconsistent or delayed signal transmission.

[0006] (3) High cost of magnetic grating read head: Another design mode is to use one magnetic grating with multiple read heads, but the cost of magnetic grating read heads in this mode is relatively high.

[0007] To address the aforementioned issues, this invention proposes a switching circuit based on a dual measurement feedback device. This system acquires the magnetic grating position information of two workstations through a single system, thereby reducing design costs and minimizing signal transmission risks. Summary of the Invention

[0008] The purpose of this invention is to provide a switching circuit based on a dual measurement feedback device to solve the problems of high cost and complex information synchronization in existing dual-station printer systems.

[0009] To achieve the above objectives, this utility model provides a switching circuit based on a dual measurement feedback device, including at least two signal input interfaces connected to the detection equipment. Each signal input interface is connected to a corresponding differential receiving chip, each differential receiving chip is connected to a signal processing terminal, the signal processing terminal is connected to the signal input terminal, and the signal input terminal is connected to the printer's main control system.

[0010] Preferably, the signal input interface converts the differential signal into a single-ended signal through the differential receiver chip IC, including U4 and U7.

[0011] Preferably, the conversion of the differential signal into a single-ended signal specifically involves:

[0012] #1_C---(#1_C-#1_C+)#1_B---(#1_B-#1_B+)#1_A---(#1_A-#1_A+);

[0013] #2_C---(#2_C-#2_C+)#2_B---(#2_B-#2_B+)#2_A---(#2_A-#2_A+).

[0014] The beneficial effects of this utility model are as follows:

[0015] (1) Significantly reduced cost: The method of obtaining magnetic grid position information by two independent systems is abandoned. Instead, one system is used to obtain information from two workstations, which greatly reduces hardware costs and avoids the use of multiple high-cost magnetic grid readers, thereby reducing the design and manufacturing costs of printers from the source.

[0016] (2) Efficient and stable signal transmission: The differential receiver chip converts the differential signal into a single-ended signal, optimizes the signal transmission form, reduces signal transmission inconsistency and delay problems, ensures stable signal transmission, and provides a foundation for the accurate operation of the printer.

[0017] (3) Intelligent and reliable: The intelligent switching module can select the optimal signal according to the actual situation, the redundant design ensures that the backup component will take over in time when the key component fails, the signal buffer unit can deal with signal transmission abnormalities, and the fault diagnosis function monitors in real time, which enhances the overall reliability and stability of the device.

[0018] (4) Strong compatibility and versatility: The signal input interface can be either a magnetic grating interface or an optical grating interface. At the same time, the improved signal processing algorithm can be compatible with signals from various measurement feedback devices, adapt to different measurement needs, and improve the applicability of the device.

[0019] (5) Improved convenience: Wireless transmission function reduces wiring costs and complexity, making it easier to install and maintain the equipment; automatic calibration function ensures data accuracy; optimized magnetic grid interface layout reduces signal interference; efficient heat dissipation design ensures stable operation for a long time, comprehensively improving the ease of use and stability of the device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is the circuit diagram of this utility model.

[0022] Figure 3 yes Figure 2 Enlarged view of part A.

[0023] Figure 4 yes Figure 2 Enlarged view of part B.

[0024] Figure 5 yes Figure 2 Enlarged view of part C.

[0025] Figure 6 yes Figure 2 Enlarged view of parts D and E.

[0026] Figure 7 yes Figure 2 Enlarged view of part F.

[0027] 1-Signal input interface; 2-Differential receiver chip; 3-Signal processing terminal; 4-Signal input terminal; 5-Main control system. Detailed Implementation

[0028] like Figure 1-7 As shown, this utility model provides a switching circuit based on a dual measurement feedback device to solve the problems of high cost and complex information synchronization in existing dual-station printer systems.

[0029] To achieve the above objectives, this utility model provides a switching circuit based on a dual measurement feedback device, including at least two signal input interfaces 1 connected to the detection device. The signal input interfaces 1 are respectively connected to the differential receiving chip 2. The differential receiving chip 2 is connected to the signal processing terminal 3. The signal processing terminal 3 is connected to the signal input terminal 4. The signal input terminal 4 is connected to the main control system 5 of the printer.

[0030] Preferably, the signal input interface 1 converts the differential signal into a single-ended signal through the IC of the differential receiver chip 2, including U4 and U7.

[0031] Preferably, the conversion of the differential signal into a single-ended signal specifically involves:

[0032] #1_C---(#1_C-#1_C+)#1_B---(#1_B-#1_B+)#1_A---(#1_A-#1_A+);

[0033] #2_C---(#2_C-#2_C+)#2_B---(#2_B-#2_B+)#2_A---(#2_A-#2_A+).

[0034] Preferably, the signal input terminal 4 receives the selection signals S1, S2, and S3 and transmits them back to the main control system 5 through communication with the main control system 5.

[0035] Preferably, the signal input interface 1 is a magnetic grid interface.

[0036] Preferably, the signal input interface 1 is a grating interface.

[0037] In this invention, the signal input terminal 4J11 is a single-ended signal output port. The signals S1, S2, and S3 output by J11 correspond to the working BUFFER signals. When U6 is selected, S1 = #1_A, S2 = #1_B, and S3 = #1_C. At this time, the first magnetic grid interface J5 is selected. When U5 is selected, S1 = #2_A, S2 = #2_B, and S3 = #2_C. At this time, the second magnetic grid interface J3 is selected.

[0038] See Figures 2-7 The circuit structure of this utility model includes a power supply, a differential receiver chip 2, a signal processing terminal 3, a signal input terminal 4, and a system main control unit 5, wherein:

[0039] The power supply includes: (1) +5V: providing the operating voltage for the circuit. (2) GND: system ground, the reference ground for all circuits.

[0040] The differential receiver chip 2 includes:

[0041] (1) U4 and U7: Model AM26LV32CDR, used to convert the differential signal of the magnetic grid into a single-ended signal.

[0042] (2) J3 (Second magnetic grid interface): Connected to the differential input pins of U4 (#2_C-,#2_C+,#2_B-,#2_B+,#2_A-,#2_A+).

[0043] (3) J5 (first magnetic grid interface): (4) Connect to the differential input pins of U7 (#1_C-,#1_C+,#1_B-,#1_B+,#1_A-,#1_A+).

[0044] The signal processing terminals 3, U4, and U7 convert the differential signal into a single-ended signal and output it to the logic signal buffers (U5 and U6).

[0045] U5 and U6: Model 74HC244, used for buffering and processing magnetic grid signals.

[0046] (1) Input of U5: Connect to the output of U7 (#1_A,#1_B,#1_C).

[0047] (2) Inputs of U6: Connected to the outputs of U4 (#2_A,#2_B,#2_C).

[0048] (3) Enable control terminals (EN and EN / ):

[0049] The enable control terminal (EN) of U5 is connected to the output (EN / ) of optocoupler U2.

[0050] The enable control terminal (EN) of U6 is connected to the output (EN) of optocoupler U2.

[0051] The output signal terminals, including the output signals (S1, S2, S3) of U5 and U6, are connected to J11 (single-ended signal output port); the inverting gate logic chip (U3), model SN74LVC1G14DBVR, is used to control the working state of the logic signal buffer. The signal input is connected to the output signal of the optocoupler U2, and the signal output is connected to the enable control terminals (EN and EN / ) of U5 and U6.

[0052] The optocoupler switch (U2), model number EN817S, is used to control the selection of the trigger signal.

[0053] Input signals: J8 (5V trigger signal input interface): Connect to 5V_SIG+ and SIG_IN-.

[0054] The J9 (24V trigger signal input interface) is connected to 24V_SIG+ and SIG_IN-.

[0055] Output signals: Output EN and EN / signals, which are connected to the enable control terminals of U5 and U6 respectively.

[0056] The input interfaces J6 and J7 of the signal input terminal 4 are used to receive single-ended signals; J6 is a signal input connected to the system, and J7 is a signal input connected to the system. J6 and J7 are grating signal input interfaces.

[0057] Signal input terminal 4J11: Used to output the selected magnetic grating or optical grating signal.

[0058] Input signal interface of signal input terminal 4: connected to the output signals (S1, S2, S3) of U5 and U6.

[0059] Output signal: Transmit the selected signal to the system main controller 5.

[0060] It also includes trigger signal input interfaces (J8 and J9), J8 (5V trigger signal input interface): connected to 5V_SIG+ and SIG_IN-, J9 (24V trigger signal input interface): connected to 24V_SIG+ and SIG_IN-.

Claims

1. A switching circuit based on a double measurement feedback device, characterized in that, It includes at least two signal input interfaces (1) connected to the detection equipment. Each signal input interface (1) is connected to the corresponding differential receiving chip (2). Each differential receiving chip (2) is connected to the signal processing terminal (3). The signal processing terminal (3) is connected to the signal input terminal (4). The signal input terminal (4) is connected to the printer's main control system (5).

2. The switching circuit based on a dual measurement feedback device according to claim 1, characterized in that, The signal input interface (1) converts the differential signal into a single-ended signal through the differential receiving chip (2). There are two differential receiving chips, namely U4 and U7.

3. The switching circuit based on a dual measurement feedback device according to claim 1, characterized in that, The signal input interface (1) is a magnetic grating interface, including a first magnetic grating interface J3 and a second magnetic grating interface J5.

4. The switching circuit based on double measurement feedback device according to claim 1, characterized in that, The signal input interface (1) is a grating interface, including a first grating interface and a second grating interface.

5. A switching circuit based on a dual measurement feedback device according to claim 2, characterized in that, The circuit signal for converting the differential signal of the differential receiver chip (2) into a single-ended signal is specifically as follows: The first magnetic grid interface is connected to the differential input pin of U4. #1_C---(#1_C-#1_C+)#1_B---(#1_B-#1_B+)#1_A---(#1_A-#1_A+); The second magnetic grid interface is connected to the differential input pin of U7. #2_C---(#2_C-#2_C+)#2_B---(#2_B-#2_B+)#2_A---(#2_A-#2_A+).

6. A switching circuit based on a dual measurement feedback device according to claim 1, characterized in that, The signal input terminal (4) receives the selection signals S1, S2 and S3 and transmits them back to the main control system (5) through communication with the main control system (5).

7. A switching circuit based on a dual measurement feedback device according to claim 1, characterized in that, The signal processing terminal (3) includes two grating signal input interfaces, namely J6 and J7.

8. A switching circuit based on a dual measurement feedback device according to claim 1, characterized in that, The signal input terminal (4) consists of two logic signal buffers, namely U5 and U6.

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