Laser scanning control device and image scanning system

Abstract

The laser scanning control device and image scanning system provided by the present invention are applied to the field of medical equipment technology. The device includes a laser, a reflection module, a position monitoring module, a first photosensitive module and a controller. The reflection surface of the reflection module reciprocates between a first reflection position and a second reflection position to reflect the incident light emitted by the laser to obtain an outgoing light. When the reflection module is at the first reflection position corresponding to the starting point of the preset scanning path of the outgoing light, the controller controls the laser to turn on. When the controller receives a shutdown signal fed back by the first photosensitive module, the laser is turned off. During the process of the reflection module rotating from the first reflection position to the second reflection position, the laser is in the on state, and during the reverse rotation, the laser is in the off state. Since there is no reciprocating scanning process, the problem of different scanning paths in the reciprocating scanning in the prior art will naturally not occur, thereby meeting the actual use requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a laser scanning control device and an image scanning system. Background Art

[0002] In the medical field, CR (Computed Radiography) imaging technology has been increasingly widely used. CR imaging technology mainly includes two major components: an imaging plate and an imaging scanning system. The imaging plate is composed of a fluorescent substance that can store X-ray energy tightly packed in a polyester board. The imaging scanning system is provided with a scanning device and an image generating device. The scanning device emits a laser to irradiate the imaging plate, and the image generating device further outputs a corresponding scanned image based on the image information generated during the irradiation process.

[0003] In the prior art, when a scanning device outputs laser light for scanning, it mostly adopts a reciprocating scanning method, that is, the scanning device continuously outputs laser light for scanning back and forth. The inventors have found that in actual applications, it is difficult to ensure that the scanning path of the laser light is exactly the same when the laser light is scanning back and forth. Once the reciprocating scanning path is different, image information will be missed, resulting in unclear scanned images, which is difficult to meet actual application requirements. Summary of the invention

[0004] The present invention provides a laser scanning control device and an image scanning system, which adopt a single-side scanning method to output laser light instead of a reciprocating scanning method, thereby avoiding image information errors and omissions caused by different reciprocating scanning paths, improving the accuracy of the scanning results and the clarity of the scanned images, and meeting actual use requirements.

[0005] To achieve the above purpose, the technical solution provided by the present invention is as follows:

[0006] In a first aspect, the present invention provides a laser scanning control device, comprising: a laser, a reflection module, a position monitoring module, a first photosensitive module and a controller, wherein:

[0007] The reflective surface of the reflective module reciprocates between a first reflective position and a second reflective position, and reflects the incident light emitted by the laser to obtain an outgoing light;

[0008] Wherein, the first reflection position corresponds to the starting point of the preset scanning path of the outgoing light, and the second reflection position corresponds to the end point of the preset scanning path;

[0009] The position monitoring module collects a target electrical parameter of the reflection module having a preset corresponding relationship with the reflection position of the reflection module, and outputs a power-on signal when it is determined according to the target electrical parameter that the reflection module is at the first reflection position;

[0010] The first photosensitive module is disposed in the preset scanning path, and the first photosensitive module is close to an end point of the preset scanning path;

[0011] The first photosensitive module outputs a shutdown signal when collecting the outgoing light;

[0012] The controller is connected to the laser, the position monitoring module and the first photosensitive module in a ratio, and controls the laser to turn on when receiving the power-on signal, and controls the laser to turn off when receiving the power-off signal.

[0013] Optionally, the position monitoring module includes: a reference signal generating circuit and a signal output circuit, wherein:

[0014] The output terminal of the reference signal generating circuit is connected to the first input terminal of the signal output circuit, and the reference signal generating circuit outputs a reference voltage;

[0015] The second input end of the signal output circuit is connected to the reflection module, and the output end of the signal output circuit is connected to the controller;

[0016] The signal output circuit collects the AC working voltage amplitude of the reflection module at any time, and outputs the power-on signal when the AC working voltage amplitude satisfies a preset relationship with the reference voltage.

[0017] Optionally, the reference signal generating circuit comprises: a rectifier circuit, wherein:

[0018] The input end of the rectifier circuit is connected to the reflection module, and the output end of the rectifier circuit serves as the output end of the reference signal generating circuit;

[0019] The rectifier circuit inputs the AC working voltage signal of the reflection module, and outputs a reference voltage based on the AC working voltage signal.

[0020] Optionally, the reference signal generating circuit further includes: a regulating circuit, wherein:

[0021] The input end of the regulating circuit is connected to the output end of the reference signal generating circuit, and the output end of the regulating circuit is connected to the first input end of the signal output circuit;

[0022] The regulating circuit regulates the magnitude of the reference voltage.

[0023] Optionally, the regulating circuit includes: a first resistor, a second resistor, a third resistor, an adjustable resistor and a comparator, wherein:

[0024] One end of the first resistor serves as an input end of the regulating circuit, and the other end of the first resistor is grounded via the second resistor;

[0025] The connection point between the first resistor and the second resistor is connected to the positive input terminal of the comparator;

[0026] The negative input terminal of the comparator is grounded via the third resistor;

[0027] The first end of the adjustable resistor is connected to the negative input end of the comparator, and the second end and the common end of the adjustable resistor are respectively connected to the output end of the comparator;

[0028] The output end of the comparator serves as the output end of the regulating circuit.

[0029] Optionally, the reflection module includes: a voice coil motor and a galvanometer, wherein:

[0030] The galvanometer is connected to the driving shaft of the voice coil motor;

[0031] The reflective surface of the galvanometer reflects the incident light of the laser.

[0032] Optionally, the controller is connected to the voice coil motor to control the operation of the voice coil motor.

[0033] Optionally, the laser scanning control device provided by any one of the above items of the present invention further includes a second photosensitive module, wherein:

[0034] The second photosensitive module is disposed in the preset scanning path and close to the starting point of the preset scanning path;

[0035] The second photosensitive module outputs a scanning signal when collecting the outgoing light.

[0036] Optionally, the controller is connected to an output end of the second photosensitive module;

[0037] The controller outputs a control instruction indicating that image information reading can be started according to the scanning signal.

[0038] In a second aspect, the present invention provides an image scanning system, comprising: an image plate carrying device, an image generating device, and a laser scanning control device as described in any one of the first aspects of the present invention, wherein:

[0039] The image plate carrying device drives the image plate to move;

[0040] The laser scanning control device outputs a laser beam that scans along a preset scanning path to scan the image plate;

[0041] The image generating device outputs a scanned image based on the image information generated by the laser light scanning the image plate.

[0042] The laser scanning control device provided by the present invention comprises a laser, a reflection module, a position monitoring module, a first photosensitive module and a controller. The reflection surface of the reflection module reciprocates between a first reflection position and a second reflection position to reflect the incident light emitted by the laser to obtain an outgoing light. On this basis, when the reflection module is at the first reflection position corresponding to the starting point of the preset scanning path of the outgoing light, the controller controls the laser to turn on and output the outgoing light for scanning. Further, the controller controls the laser to turn off when receiving a shutdown signal. Through the control device provided by the present invention, during the process of the reflection module rotating from the first reflection position to the second reflection position, the laser is in an on state and can output the laser light for scanning. When it rotates back from the second reflection position to the first reflection position, the laser is in an off state and will not scan, that is, a unilateral scan from the first reflection position to the second reflection position is realized. Since there is no reciprocating scanning process, the problem of different scanning paths in the reciprocating scanning in the prior art will naturally not occur, and the image information errors caused by different reciprocating scanning paths can be avoided, the accuracy of the scanning result and the clarity of the scanned image can be improved, and the actual use requirements can be met. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1 is a structural schematic diagram of a laser scanning control device provided by an embodiment of the present invention;

[0045] Figure 2 is a circuit topology diagram of a position monitoring module provided by an embodiment of the present invention;

[0046] Figure 3 is a circuit topology diagram of another position monitoring module provided by an embodiment of the present invention;

[0047] Figure 4 is a schematic structural diagram of another laser scanning control device provided by an embodiment of the present invention;

[0048] Figure 5It is a structural schematic diagram of an image scanning system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0050] See also Figure 1 , Figure 1 is a structural schematic diagram of a laser scanning control device provided by an embodiment of the present invention. The laser scanning control device provided by an embodiment of the present invention comprises: a laser 10, a reflection module 20, a position monitoring module 30, a first photosensitive module 40 and a controller 50, wherein:

[0051] The laser 10 outputs a laser beam for scanning the image plate. To facilitate description of the technical solution provided in the embodiment of the present invention, from the perspective of the reflection module 20, the laser beam emitted by the laser 10 is defined as an incident beam. Correspondingly, the laser beam obtained after the reflection module 20 reflects the incident beam is defined as an outgoing beam. It can be understood that, in actual applications, the laser beam actually irradiated onto the image plate is output by the reflection module 20.

[0052] The position monitoring module 30 is connected to the reflection module 20 , and the controller 50 is connected to the laser 10 , the position monitoring module 30 and the first photosensitive module 40 respectively.

[0053] Furthermore, the reflecting surface of the reflecting module 20 can reciprocate between the first reflecting position and the second reflecting position. It can be understood that when the laser 10 emits an incident light, the outgoing light output by the reflecting module 20 reflecting the incident light will change between the first scanning angle corresponding to the first reflecting position and the second scanning angle corresponding to the second reflecting position. The path corresponding to the scanning from the first scanning angle to the second scanning angle is the preset scanning path of the outgoing light. The reflecting surface of the reflecting module 20 is in the first reflecting position, that is, the position where the outgoing light shines when the outgoing light is at the first scanning angle, which is the starting point of the preset scanning path. Correspondingly, the reflecting surface of the reflecting module 20 is in the second reflecting position, that is, the position where the outgoing light shines when the outgoing light is at the second scanning angle, which is the end point of the preset scanning path, see Figure 1 As shown, the path between point A and point B is the preset scanning path, point A is the starting point / end point of the preset scanning path, and point B is the end point / starting point of the preset scanning path.

[0054] Based on the above content, it can be seen that not only the first reflection position of the reflection module 20 corresponds to the starting point of the preset scanning path, and the second reflection position corresponds to the end point of the preset scanning path, but also any reflection position of the reflection module 20 between the first reflection position and the second reflection position has a unique corresponding relationship with the scanning angle of the outgoing light and the scanning position of the outgoing light in the preset scanning path.

[0055] Optional, see Figure 1 , the reflection module 20 includes a galvanometer 201 and a voice coil motor 202, wherein the reflection surface of the galvanometer 201, i.e., the reflection surface of the reflection module 20, can perform mirror reflection on the incident light, and the driving shaft of the voice coil motor 202 is connected to the galvanometer 201, and the voice coil motor 202 can drive the galvanometer 201 to reciprocate between a first reflection position and a second reflection position after being powered on. As for the specific connection between the voice coil motor 202 and the galvanometer 201 for reciprocating rotation, it can be realized with reference to the prior art, and the present invention does not limit this. Furthermore, as an optional implementation method, the voice coil motor 202 in the reflection module 20 can also be connected to the controller 50, and the controller 50 controls the working process of the voice coil motor 202.

[0056] The position monitoring module 30 collects the target electrical parameters of the reflection module 20 having a preset corresponding relationship with the reflection position of the reflection module 20, and can output a power-on signal when it is determined that the reflection module 20 is in the aforementioned first reflection position according to the target electrical parameters. Optionally, based on the working principle of the voice coil motor 202, it can be known that the telescopic position of the driving shaft of the voice coil motor 202 has a unique corresponding relationship with the amplitude of the AC working voltage of the voice coil motor 202, and the galvanometer 201 is connected to the driving shaft of the voice coil motor 202, and the reflection position of the galvanometer 201 has a unique corresponding relationship with the telescopic position of the driving shaft of the voice coil motor 202, thereby making the reflection position and the amplitude of the AC working voltage of the voice coil motor 202 have a unique corresponding relationship.

[0057] Based on this, the position monitoring module 30 provided in this embodiment includes a reference signal generating circuit ( Figure 1 Not shown) and signal output circuit ( Figure 2 (not shown in the figure), wherein the output end of the reference signal generating circuit is connected to the first input end of the signal output circuit, and outputs the reference voltage to the signal output circuit. Further, the second input end of the signal output circuit is connected to the reflection module 20, specifically to the voice coil motor 202, to collect the AC working voltage amplitude of the voice coil motor 202. At the same time, the output end of the signal output circuit serves as the output end of the position monitoring module 30 and is connected to the controller 50.

[0058] Based on the above connection relationship, after the reflection module 20 is powered on, the signal output circuit can collect the AC working voltage amplitude of the reflection module 20 at any time, and obtain the reference voltage provided by the reference signal generating circuit. As mentioned above, the AC working voltage amplitude of the reflection module 20 has a unique corresponding relationship with the reflection position of the reflection module 20. Therefore, in practical applications, the AC working voltage amplitude of the reflection module 20 when it is in the first reflection position can be clearly determined, and the value of the reference voltage can be determined based on this specific amplitude, and further, when the obtained AC working voltage amplitude and the reference voltage satisfy the preset relationship, a power-on signal is output.

[0059] like Figure 1 As shown, the first photosensitive module 40 is arranged in the aforementioned preset scanning path, and the first photosensitive module 40 is arranged near the end point B of the preset scanning path, and the first photosensitive module 40 outputs a shutdown signal when the outgoing light is collected. Optionally, the first photosensitive module 40 can be implemented by using a photosensitive sensor, and of course, other devices that can output corresponding signals when light is collected can also be used to implement it, which also falls within the scope of protection of the present invention without exceeding the scope of the core idea of ​​the present invention.

[0060] Based on the above connection relationship, the controller controls the laser 10 to turn on when receiving a power-on signal, and controls the laser 10 to turn off when receiving a power-off signal. The controller 50 can be implemented based on FPGA, or an existing controller with output computing capability in the prior art can be selected, and the present invention does not limit this.

[0061] The working process of the laser scanning control device provided by the embodiment of the present invention is introduced below:

[0062] When the controller 50 is connected to the voice coil motor 202 in the reflection module 20 , the controller 50 controls the voice coil motor 202 to start, so that the reflection surface of the reflection module 20 reciprocates between the first reflection position and the second reflection position.

[0063] During the rotation of the reflective surface of the reflective module 20, the position monitoring module 30 determines the reflective position of the reflective module 20 according to the AC working voltage of the voice coil motor 202. If the reflective module 20 is determined to be in the first reflective position at any time, the position monitoring module 30 outputs a power-on signal, and the controller 50 controls the laser 10 to turn on according to the power-on signal and outputs the incident light. The outgoing light after being reflected by the reflective module 20 will irradiate the starting position shown at point A, and then the reflective surface of the reflective module 20 rotates from the first reflective position to the second reflective position, and at the same time, the outgoing light is scanned from point A to point B along a preset scanning path.

[0064] When the emitted light scans to point C, the first photosensitive module 40 receives the laser light and outputs a shutdown signal. The controller 50 further controls the laser 10 to shut down according to the shutdown signal and stops outputting the laser light, thus ending the scanning. Correspondingly, the reflective surface of the reflective module 20 continues to rotate, and the device reaches point B corresponding to the second reflective position.

[0065] Since the laser 10 is already in the off state, when the reflective surface of the reflective module 20 returns from the second reflective position to the first reflective position, no scanning is performed again until the position monitoring module 30 determines that the reflective module 20 reaches the first reflective position again and starts the next scanning process.

[0066] In summary, through the control device provided by the present invention, when the reflection module rotates from the first reflection position to the second reflection position, the laser is in the on state and can output laser light for scanning. When it rotates back from the second reflection position to the first reflection position, the laser is in the off state and does not scan, that is, unilateral scanning from the first reflection position to the second reflection position is realized. Since there is no reciprocating scanning process, the problem of different scanning paths in the reciprocating scanning in the prior art will naturally not occur. It can avoid image information errors caused by different reciprocating scanning paths, improve the accuracy of the scanning results and the clarity of the scanned images, and meet actual use needs.

[0067] As mentioned above, for a determined reflection module, the amplitude of its AC working voltage when it is in the first reflection position is basically determined. When the control accuracy requirement is not high, the reference signal generation circuit can be implemented using an independent voltage source as long as it can provide a reference voltage. However, if the control accuracy requirement is high, or the AC working voltage of the reflection module is not stable enough, it is necessary to provide an adaptive reference voltage according to the actual application scenario. To solve this problem, an embodiment of the present invention provides an optional implementation method of a position monitoring module. Optionally, see Figure 2 , Figure 2 This is a circuit topology diagram of a position monitoring module provided by an embodiment of the present invention.

[0068] In this embodiment, the reference signal generating circuit is implemented based on a rectifier circuit. The input end of the rectifier circuit is connected to the reflection module to receive the AC working voltage signal (shown as Uin in the figure) of the reflection module. Furthermore, the output end of the rectifier circuit is used as the output end of the reference signal generating circuit and is connected to the first input end of the signal output circuit. As for the optional configuration of the rectifier circuit, please refer to Figure 2As shown, it will not be elaborated in detail here. Of course, in practical applications, other forms of rectifier circuits can also be used. As long as the circuit can rectify and filter the AC working voltage signal of the reflection module and output the reference voltage, it is optional. Under the premise of not exceeding the scope of the core idea of ​​the present invention, it also belongs to the scope of protection of the present invention.

[0069] It can be imagined that, in practical applications, as long as the AC working voltage of the reflection module is stable, the obtained reference voltage is constant.

[0070] Furthermore, the circuit topology of the signal output circuit can also be found in Figure 2 As shown, the core component of the signal output circuit is the comparator U2. The negative input terminal of the comparator U2 is used as the first input terminal of the signal output circuit and is connected to the output terminal of the rectifier circuit. The positive input terminal of the comparator U2 is used as the second input terminal of the signal output circuit to receive the AC working voltage signal of the reflection module. The output terminal of the comparator U2 is used as the output terminal of the signal output circuit. Figure 2 In the embodiment shown, in order to ensure the reliable operation of the signal output circuit, a corresponding protection resistor is also provided on the basis of the comparator U2, which will not be described in detail here. For the specific connection relationship, please refer to Figure 2 Of course, other circuit topologies can also be used to form signal output circuits, or Figure 2 The signal output circuit provided in the illustrated embodiment may be subjected to foreseeable deformation, which also falls within the scope of protection of the present invention without exceeding the scope of the core idea of ​​the present invention.

[0071] Considering that in practical applications, it is possible to adjust the reference voltage within a small range as needed to adapt to changes in the use environment of the control device and differences in actual device parameters, the present invention is Figure 2 Based on the embodiment shown, another position monitoring module is provided, optionally, see Figure 3 ,exist Figure 2 On the basis of the illustrated embodiment, the position monitoring module provided in this embodiment further includes a regulating circuit.

[0072] like Figure 3 As shown, the regulating circuit includes a first resistor R1, a second resistor R2, a third resistor R3, an adjustable resistor Rs and a comparator U1, wherein:

[0073] One end of the first resistor R1 serves as the input end of the adjustment circuit and is connected to the output end of the reference signal generating circuit. The other end of the first resistor R1 is grounded via the second resistor R2. At the same time, the connection point between the first resistor R1 and the second resistor R2 is connected to the positive input end of the comparator U1. Further, the negative input end of the comparator U1 is grounded via the third resistor R3. The first end of the adjustable resistor Rs is connected to the negative input end of the comparator U1. The second end and the common end of the adjustable resistor Rs are respectively connected to the output end of the comparator U1. The output end of the comparator U1 serves as the output end of the adjustment circuit and is connected to the first input end of the signal output circuit. The reference voltage output by the rectifier circuit can be adjusted by the adjustment circuit to meet the needs of actual application scenarios.

[0074] Optionally, based on any of the above embodiments, the present invention also provides another laser scanning control device, see Figure 4 ,exist Figure 1 On the basis of the illustrated embodiment, the control device provided in this embodiment further includes a second photosensitive module 60. Similar to the aforementioned first photosensitive module 40, the second photosensitive module 60 can also be implemented by a photosensitive sensor, which will not be described in detail here.

[0075] like Figure 4 As shown, the second photosensitive module 60 is arranged in the aforementioned preset scanning path and is close to the starting point of the scanning path, that is, close to point A. When the second photosensitive module 60 collects the outgoing light, it will output a scanning signal. The controller 50 is connected to the output end of the second photosensitive module 60. After the second photosensitive module 60 outputs the scanning signal, the controller 50 outputs a control instruction indicating that the image information reading can be started according to the obtained scanning signal. It can be understood that the control instruction can control the start of reading the impact information in the image plate.

[0076] Compared with Figure 1 The embodiment shown in the figure can not only realize single-sided scanning, but also control the reading time of the affected information, thereby avoiding starting to read the image information during the scanning process from point A to point D, effectively reducing the collection of invalid image information, reducing the amount of data, and further improving the quality of the scanned image.

[0077] Optional, see Figure 5 , Figure 5 is a structural schematic diagram of an image scanning system provided by an embodiment of the present invention. The image scanning system provided by this embodiment includes an image plate carrying device, an image generating device and a laser scanning control device provided by any of the above embodiments, wherein:

[0078] The image plate carrying device drives the image plate to move;

[0079] The laser scanning control device outputs a laser beam that scans along a preset scanning path to scan the image plate;

[0080] The image generating device outputs a scanned image based on the image information generated by the laser light scanning the image plate.

[0081] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0082] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0083] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0084] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the core concept or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A laser scanning control device, characterized in that: include: A laser, a reflection module, a position monitoring module, a first photosensitive module and a controller, wherein: The reflective surface of the reflective module reciprocates between a first reflective position and a second reflective position, and reflects the incident light emitted by the laser to obtain an outgoing light; Wherein, the first reflection position corresponds to the starting point of the preset scanning path of the outgoing light, and the second reflection position corresponds to the end point of the preset scanning path; The position monitoring module collects a target electrical parameter of the reflection module having a preset corresponding relationship with the reflection position of the reflection module, and outputs a power-on signal when it is determined according to the target electrical parameter that the reflection module is at the first reflection position; The first photosensitive module is disposed in the preset scanning path, and the first photosensitive module is close to an end point of the preset scanning path; The first photosensitive module outputs a shutdown signal when collecting the outgoing light; The controller is connected to the laser, the position monitoring module and the first photosensitive module respectively, and controls the laser to turn on when receiving the power-on signal, and controls the laser to turn off when receiving the power-off signal; It also includes a second photosensitive module, wherein: The second photosensitive module is disposed in the preset scanning path and close to the starting point of the preset scanning path; The second photosensitive module outputs a scanning signal when collecting the outgoing light; The controller is connected to the output end of the second photosensitive module; The controller outputs a control instruction indicating that image information reading can be started according to the scanning signal.

2. The laser scanning control device according to claim 1, characterized in that: The position monitoring module includes: a reference signal generating circuit and a signal output circuit, wherein: The output terminal of the reference signal generating circuit is connected to the first input terminal of the signal output circuit, and the reference signal generating circuit outputs a reference voltage; The second input end of the signal output circuit is connected to the reflection module, and the output end of the signal output circuit is connected to the controller; The signal output circuit collects the AC working voltage amplitude of the reflection module at any time, and outputs the power-on signal when the AC working voltage amplitude satisfies a preset relationship with the reference voltage.

3. The laser scanning control device according to claim 2, characterized in that: The reference signal generating circuit comprises: a rectifier circuit, wherein: The input end of the rectifier circuit is connected to the reflection module, and the output end of the rectifier circuit serves as the output end of the reference signal generating circuit; The rectifier circuit inputs the AC working voltage signal of the reflection module, and outputs a reference voltage based on the AC working voltage signal.

4. The laser scanning control device according to claim 2, characterized in that: The reference signal generating circuit further includes: a regulating circuit, wherein: The input end of the regulating circuit is connected to the output end of the reference signal generating circuit, and the output end of the regulating circuit is connected to the first input end of the signal output circuit; The regulating circuit regulates the magnitude of the reference voltage.

5. The laser scanning control device according to claim 4, characterized in that: The regulating circuit comprises: a first resistor, a second resistor, a third resistor, an adjustable resistor and a comparator, wherein: One end of the first resistor serves as an input end of the regulating circuit, and the other end of the first resistor is grounded via the second resistor; The connection point between the first resistor and the second resistor is connected to the positive input terminal of the comparator; The negative input terminal of the comparator is grounded via the third resistor; The first end of the adjustable resistor is connected to the negative input end of the comparator, and the second end and the common end of the adjustable resistor are respectively connected to the output end of the comparator; The output end of the comparator serves as the output end of the regulating circuit.

6. The laser scanning control device according to claim 2, characterized in that: The reflection module includes: a voice coil motor and a galvanometer, wherein: The galvanometer is connected to the driving shaft of the voice coil motor; The reflective surface of the galvanometer reflects the incident light of the laser.

7. The laser scanning control device according to claim 6, characterized in that: The controller is connected to the voice coil motor and controls the operation of the voice coil motor.

8. An image scanning system, characterized in that: include: An image plate carrying device, an image generating device and a laser scanning control device as claimed in any one of claims 1 to 7, wherein: The image plate carrying device drives the image plate to move; The laser scanning control device outputs a laser beam that scans along a preset scanning path to scan the image plate; The image generating device outputs a scanned image based on the image information generated by the laser light scanning the image plate.

Images