CN104330238A - A laser scanner test device and test circuit - Google Patents

Abstract

The invention discloses a laser scanner testing device and a testing circuit, which comprise a power supply module, a clamp and a display, wherein one end of the clamp is electrically connected with the power supply module, and the other end of the clamp is electrically connected with the display; the clamp comprises an upper cover body, and a lower cover body is fixedly connected to the lower end of the upper cover body; one side of the outer end surface of the lower cover body is provided with a mounting hole for mounting a photosensitive device, and the other side of the outer end surface of the lower cover body is provided with a power supply input port and a signal output port; and a fixed platform for mounting a photosensitive device PCB is arranged on one side of the lower cover body corresponding to the mounting hole, and a clamping groove for mounting an input/output port switching PCB is arranged on one side of the lower cover body corresponding to the signal output port. The invention has the following positive effects: the device reaches the effect of short time calibration laser scanner horizontal position through fixed mounting photosensitive element and external display on anchor clamps, and the loaded down with trivial details difficult problem of technology when having solved calibration laser scanner horizontal position.

Description

A laser scanner test device and test circuit

technical field

The invention relates to the field of laser printers, in particular to a laser scanner testing device and a testing circuit.

Background technique

Today, printers have become an indispensable piece of office equipment for everyday work. Most of the printers used at this stage are laser printers. Laser printers need to adjust the horizontal position of the laser scanner during production, so as to ensure the normal operation of the laser printer during printing.

Fixtures for testing laser scanners are usually fixed using jigs, but existing test jigs can only accommodate lower-end test equipment. On the production line, when adjusting the laser scanner through the existing detection device, it can only rely on repeated printing of proofs to judge whether the horizontal position of the laser scanner is appropriate. This is a waste of time and paper. Because the efficiency of adjusting the horizontal position of the laser scanner is very low, it is impossible to guarantee the mass production of the printer.

It can be seen that how to develop a laser scanner test device and test circuit, which can complete the horizontal position calibration of the laser scanner in a short time and does not require a sample, is a problem to be solved urgently by those skilled in the art.

Contents of the invention

In order to solve the above problems, the present invention provides a laser scanner testing device capable of completing the horizontal calibration of the laser scanner in a short time without sample testing.

The technical solution adopted in the present invention is a laser scanner test device and a test circuit, including a power module, a fixture and a display, one end of the fixture is electrically connected to the power module, and the other end of the fixture is electrically connected to the display; The clamp includes an upper cover body, the lower end of the upper cover body is fixedly connected with a lower cover body; one side of the outer end surface of the lower cover body is provided with a mounting hole for installing a photosensitive device, and the outer end surface of the lower cover body is on the other hand One side is provided with a power input port and a signal output port; the inside of the lower cover body is provided with a fixed platform for installing the photosensitive device PCB board on the side corresponding to the installation hole, and the inside of the lower cover body is connected to the signal output port. The side corresponding to the port is provided with a card slot for installing the input/output port adapter PCB board.

Further, the display is a liquid crystal display.

Further, the photosensitive device is a CMOS photosensitive device.

Further, the number of the mounting holes is 2.

Further, the signal output ports are AV video output ports, the number of which is two.

Further, the test circuit of the laser scanner: also includes a signal output and power input module, the photosensitive module; the power module converts alternating current to direct current through AC-DC, and the direct current is supplied by the signal output and power input module Pin 1 of the P5 interface is connected to a DC/DC voltage conversion chip to convert the direct current into a low-voltage direct current, and the low-voltage direct current is delivered to the photosensitive device through the power supply pin of the photosensitive module, and the photosensitive device is connected with An external crystal oscillator that generates a clock signal, the clock signal generated by the external crystal oscillator is connected to pins 1, 2, 5 and 6 of the flash memory chip through pins 19, 20, 21 and 22, and then through the Pin 6 of the flash memory chip is connected to pin 3 of the P5 interface of the signal output and power input module and outputs signals to the display.

A laser scanner test device and test circuit of the present invention have the following advantages compared with the prior art: First, the fixture used in the laser scanner test device can be equipped with photosensitive devices, so that different levels of sensitivity can be sensed through the above photosensitive devices The change in the intensity of the laser light emitted by the laser scanner under the position. The accuracy of adjusting the horizontal position of the laser scanner is greatly improved by improving the fixture structure. Second, the photosensitive device of the laser scanner test device is also connected to a display, and the horizontal position of the laser scanner sensed by the photosensitive device can reflect the position change of the laser scanner in real time and intuitively through an external display, avoiding repeated use of proofs for calibration tedious process. Thirdly, the circuit module part of the testing device can carry out accurate data collection through video scanning, which is conducive to determining the position of the laser scanning tester and ensures the accuracy of reading information from the scanner.

Description of drawings

Fig. 1 is a schematic diagram of the present invention

Fig. 2 is a structural representation of the present invention

Fig. 3 is the top view of the present invention

Figure 4 is an exploded view of the present invention

Fig. 5 is the schematic diagram of the power supply circuit of the present invention

Fig. 6 is the circuit principle diagram of signal output and power input module of the present invention

Fig. 7 is the schematic diagram of the photosensitive device circuit of the present invention

In the picture:

1. Power input port 2. Signal output port 3. Photosensitive device

4. Upper cover 5. Card slot 6. Lower cover

7. Fixed platform 8. Power module 9. Display

10. Signal output and power input module

Detailed ways

Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in FIGS. 1-7 , a laser scanner testing device and testing circuit include a power supply module 8 , a fixture and a display 9 . One end of the clamp is electrically connected to the power module 8 , and the other end of the clamp is electrically connected to the display 9 . The display 9 adopted in this embodiment is a liquid crystal display, which improves the display quality. The clamp includes an upper cover body 4 and a lower cover body 6, both of which are fixedly connected by buckles to facilitate the disassembly of the clamp. One side of the outer end surface of the lower cover body 6 is provided with a mounting hole, and a CMOS photosensitive device 3 is fixed in the installation opening; the other side of the outer end surface of the lower cover body 6 is provided with a power input port 1 and a signal output port 2 . The signal output by the signal outlet 2 is an AV video signal. The number of the mounting holes is 2, that is, 2 CMOS photosensitive devices 3 are installed on the jig, which ensures that the result of detecting the position of the scanning laser unit obtained by the CMOS photosensitive device 3 is more accurate. In addition, the CMOS photosensitive device 3 also has the advantages of cost saving and power consumption reduction. A fixing platform 7 is provided inside the lower cover 6 corresponding to the mounting hole, and a CMOS photosensitive device PCB board is fixed on the fixing platform 7 by screws. The photosensitive device 3 perceives the change of the position of the laser scanner by detecting the difference in the intensity of the emitted laser light when the laser scanner is at different horizontal positions, and converts the optical signal into an electrical signal through the CMOS photosensitive device PCB board. A card slot 5 is provided on the side of the lower cover 6 corresponding to the signal output port 2 , and an input/output port adapter PCB board is installed in the card slot 5 . The CMOS photosensitive device PCB board is connected with the input/output interface transfer PCB board through a circuit. The electrical signal output by the CMOS photosensitive device PCB board is transmitted to the input/output port adapter PCB board to be converted into an AV video signal, and finally connected to the liquid crystal display circuit through the signal output port 2 . Since the output signal is an AV video signal, two signal output ports 2 are provided. In this way, the change of the horizontal position of the laser scanner can be detected in real time and intuitively when the horizontal position of the laser scanner is adjusted.

It should be noted that the installation hole corresponds to the fixed platform 7, which means that both are located in the same area of the lower cover 6, but the installation hole is located on the outer end surface of the lower cover 6, and The platform 7 is located inside the lower cover; the signal output port 2 corresponds to the card slot 5, which means that both are located in the same area of the lower cover 6, only the signal output port 2 is located on the outer end surface of the lower cover 6 , and the card slot 5 is located inside the lower cover 6 .

The circuit connection principle of the laser scanner testing device is as follows: the device circuit includes a power module 8 , a photosensitive module, a signal output and power input module 10 and a display 9 . The power module 8 adopts the AC-DC method to convert the 220V alternating current into a 5V direct current, and then the +5V direct current is converted by the signal output and pin 1 of the P5 interface of the power input module 10 through the DC/DC voltage conversion chip RT8259G The direct current of 2.8V is used to supply the power supply pins of the CMOS photosensitive chip MT9V136 and the FLASH flash memory chip W254AX40A of the photosensitive device 3 in the photosensitive module. Since the CMOS photosensitive chip MT9V136 is powered by dual power supplies, +2.8V is transformed into +1.8V by the DC/DC voltage conversion chip RT9167 to supply the other pin of the CMOS photosensitive chip MT9V136.

After the power supply module 8 supplies power, the CMOS photosensitive device MT9V136 generates a clock signal through the external crystal oscillator Y1, and then reads the CMOS photosensitive chip MT9V136 by connecting pins 19-22 with pins 1, 2, 5 and 6 of the FLASH flash memory chip W254AX40A After configuring the parameters, the CMOS photosensitive chip MT9V136 can sense and identify the external laser light source, and finally output the AV video signal to the display 9 through the connection between the 6 pin and the 3 pin of the P5 interface of the signal output and power input module 10. Accurate data collection can be performed through the application of the test circuit, which is beneficial to the position positioning of the laser scanning tester.

An embodiment of the present invention has been described in detail above, but the content described is only a preferred embodiment of the present invention, and cannot be considered as limiting the implementation scope of the present invention. All equivalent changes and improvements made according to the application scope of the present invention shall still belong to the scope covered by the patent of the present invention.

Claims (6)

1. laser scanner proving installation and a test circuit, is characterized in that:

Comprise power module (8), fixture and display (9), described fixture one end is electrically connected with described power module (8), and the described fixture other end is electrically connected with described display (9);

Described fixture comprises upper cover body (4), and described upper cover body (4) lower end is fixedly connected with lower cover (6); The outside end face side of described lower cover (6) is provided with the mounting hole for installing sensor devices (3), and the outside end face opposite side of described lower cover (6) is provided with power inlet (1) and signal output (2); The inner side corresponding with described mounting hole of described lower cover (6) is provided with the stationary platform (7) for installing sensor devices pcb board, and described lower cover (6) inside and described signal output (2) corresponding side are provided with to transfer the draw-in groove (5) of pcb board for installing I/O port.

2. laser scanner proving installation according to claim 1, is characterized in that: described display (9) is liquid crystal display.

3. laser scanner proving installation according to claim 1, is characterized in that: described sensor devices (3) is CMOS.

4. laser scanner proving installation according to claim 1, is characterized in that: the quantity of described mounting hole is 2.

5. laser scanner proving installation according to claim 1, is characterized in that: described signal output (2) is AV video output, and its quantity is 2.

6. laser scanner proving installation according to claim 1, is characterized in that: also comprise signal and export and Power Entry Module (10), described illuminant module, alternating current is changed direct current through AC-DC mode by described power module (8), described direct current is connected DC/DC voltage conversion chip by signal output with 1 pin of the P5 interface of Power Entry Module (10) and described direct current is converted to low voltage and direct current, described low voltage and direct current is delivered to described sensor devices (3) through the power pin of described illuminant module, described sensor devices (3) is connected with the external crystal-controlled oscillation sheet of clocking, the clock signal that described external crystal-controlled oscillation sheet produces is through 19 pin, 20 pin, 21 pin and 22 pin are connected 1 pin of flash chip respectively, 2 pin, 5 pin and 6 pin, to export with described signal through 6 pin of described flash chip again and 3 pin of P5 interface of Power Entry Module (10) are connected and output signal to display (9).