Scanning camera shifting device and scanning camera

Abstract

The present invention relates to the field of scanning camera technology, and in particular to a scanning camera shift device and a scanning camera, comprising a base, a driving member and a shift mechanism mounted on the base, and a connecting member connecting the driving member and the shift mechanism; the driving member can drive the shift mechanism to move and shift along a first direction through the connecting member; the shift mechanism is provided with a first circuit board, and the first circuit board is provided with a plurality of groups of contacts arranged along the first direction, each group of contacts includes a positive contact and a negative contact, and when the shift mechanism moves to a gear position, at least one group of positive contacts and negative contacts can be connected to a second circuit board. The present invention can reduce the risk of oscillation echoes in the pulse signal in the second circuit board and improve the quality of the output pulse signal.

Description

Technical Field

[0001] The present invention relates to the technical field of scanning cameras, and in particular to a scanning camera shifting device and a scanning camera. Background Art

[0002] In the ultrafast imaging system of the image converter tube, high-speed scanning pulses have important applications. The high-slope leading-edge pulses generated by them can provide fast scanning signals for the deflection system of the image converter tube scanning camera, so that the image converter tube camera can achieve fast scanning and separation of ultrafast signals in the time dimension. In the scanning camera system with picosecond time resolution, the slope of the scanning pulse signal is required to reach hundreds to thousands of volts per nanosecond; in the repetitive frequency synchronous scanning camera system, the operating trigger frequency range is 1Hz to 1MHz, and the slope range of the scanning pulse signal is also tens to hundreds of volts per nanosecond.

[0003] High-slope pulse signals are usually generated by MOS tubes or avalanche tubes. The slope of the pulse signal produced can only be changed by changing the circuit structure. Different scanning slopes correspond to different scanning speeds of the scanning camera. Therefore, to make the scanning camera work at different scanning speeds, it is necessary to replace the structural components of the scanning pulse generating circuit, which are usually called gear components. Generally, the gear components in the scanning pulse generating circuit are connectors made of electronic components such as capacitors, inductors, and resistors. In the use environment of X-ray scanning cameras, manual gear shifting requires manual operation, and the human body will be exposed to the danger of X-ray radiation. Therefore, manual gear shifting is extremely inconvenient.

[0004] The existing automatic shifting technology is usually a shifting method controlled by relays, that is, a part of the main scanning circuit is divided into a scanning gear area, and the circuit modules of different gears are arranged in parallel in this area, each path is a gear module, and a relay is used to connect each path to the main scanning circuit. The relay is controlled by remote commands, so that only a single gear module is connected to the main circuit at a time, and other gear modules are disconnected from the main circuit. This method realizes remote automatic control of circuit gears, but has the following disadvantages.

[0005] (1) Since a relay is added to the scanning circuit, an additional capacitor is introduced, which increases the circuit's capacitive reactance and affects the slope and linearity of the scanning pulse.

[0006] (2) The circuit's impulse response becomes slower and the signal trigger delay becomes longer.

[0007] (3) Since the relay in each circuit is always connected to the main circuit, the pulse signal generated by the main circuit is prone to oscillation and echo, and the quality of the output pulse signal deteriorates. Summary of the invention

[0008] Based on the above, the purpose of the present invention is to provide a scanning camera shifting device to solve the problems of scanning pulse being affected, signal triggering delay being increased, and signal output quality being deteriorated during the automatic shifting process of the scanning camera.

[0009] To achieve the above object, the present invention adopts the following technical solutions:

[0010] The present invention provides a scanning camera shift device, comprising a base, a driving member and a shift mechanism installed on the base, and a connecting member connecting the driving member and the shift mechanism; the driving member can drive the shift mechanism to move and shift along a first direction through the connecting member; the shift mechanism is provided with a first circuit board, and the first circuit board is provided with multiple groups of contacts arranged along the first direction, each group of contacts includes a positive contact and a negative contact, and when the shift mechanism moves to a gear position, at least one group of the positive contacts and the negative contacts can be connected to the second circuit board.

[0011] Optionally, the shift mechanism includes a carrier, a sliding member, and the first circuit board disposed on the sliding member, the connecting member is used to connect the driving member and the sliding member, and the driving member can drive the sliding member to slide along the first direction on the carrier through the connecting member.

[0012] Optionally, the bearing member includes two fixed blocks arranged opposite to each other, the two fixed blocks are both provided with a sliding groove along the first direction, and the sliding member is provided with two sliding blocks, and the two sliding blocks can slide along the two sliding grooves.

[0013] Optionally, the driving member is a linear motor, the connecting member includes a screw sleeve and a connecting plate arranged on one side of the screw sleeve, the screw sleeve is rotationally connected to a stud of the linear motor, and the connecting plate is fixedly connected to the sliding member.

[0014] Optionally, the first circuit board is provided with an avoidance groove arranged along the first direction, and the stud can move in the avoidance groove.

[0015] Optionally, the linear motor is fixed to the base via a fixing plate, the fixing plate includes a first plate and a second plate whose planes are perpendicular to each other, the linear motor is fixed to the first plate via screws, a fixing hole is provided on the second plate, and the screws pass through the fixing hole to fix the fixing plate to the base.

[0016] Optionally, the fixing hole is a waist-shaped hole, and the opening direction of the waist-shaped hole is perpendicular to the first direction.

[0017] Optionally, the linear motor is arranged above the base.

[0018] Optionally, the scanning camera shifting device further includes a limiter, and the limiter can limit the stroke of the shifting mechanism.

[0019] A scanning camera comprises the scanning camera shifting device described in any one of the above technical solutions.

[0020] The beneficial effects of the present invention are:

[0021] The scanning camera shift device provided by the present invention comprises a base, a driving member and a shift mechanism installed on the base, and a connecting member connecting the driving member and the shift mechanism; the driving member can drive the shift mechanism to move and shift along a first direction through the connecting member; the shift mechanism is provided with a first circuit board, and the first circuit board is provided with a plurality of groups of contacts arranged along the first direction, each group of contacts includes a positive contact and a negative contact, and when the shift mechanism moves to a gear position, at least one group of positive contacts and negative contacts can be connected to the second circuit board.

[0022] The driving member drives the shift mechanism to move through the connecting member. During the movement of the shift mechanism, the positive contacts and negative contacts in each group of contacts on the first circuit board are simultaneously connected or separated with the second circuit board, so that the positive and negative circuits on the second circuit board are simultaneously connected or disconnected. During the shifting process, no redundant capacitor components are introduced, which is conducive to the normalization of the slope of the scanning pulse, the faster circuit impulse response, and the reduced signal triggering delay; in addition, since the positive and negative circuits are simultaneously connected during the shifting process, the risk of oscillation echoes in the pulse signal in the second circuit board is reduced, and the quality of the output pulse signal is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of a scanning camera shifting device provided by an embodiment of the present invention;

[0024] Figure 2 is a schematic diagram of the cooperation between the scanning camera shift device and the second circuit board provided by an embodiment of the present invention;

[0025] Figure 3 The embodiment of the present invention provides Figure 2 A partial enlarged view of point A in the middle.

[0026] In the figure:

[0027] 1. Base; 11. Hole; 2. Linear motor; 21. Fixed plate; 3. Shift mechanism; 31. Fixed block; 32. Slide groove; 33. Sliding member; 4. Connecting member; 41. Screw sleeve; 42. Connecting plate; 5. First circuit board; 51. Contact; 52. Avoidance groove; 6. Second circuit board; 61. Connecting piece; 62. Arc hook; 7. Limiting member. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] In the description of this embodiment, the terms "upper", "lower", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0032] Figure 1 is a schematic structural diagram of a scanning camera shifting device provided by an embodiment of the present invention; Figure 2 is a schematic diagram of the cooperation between the scanning camera shift device and the second circuit board provided by an embodiment of the present invention; Figure 3 The embodiment of the present invention provides Figure 2 A partial enlarged view, reference Figure 1-3The present embodiment provides a scanning camera shift device, comprising a base 1, a driving member and a shift mechanism 3 installed on the base 1, and a connecting member 4 connecting the driving member and the shift mechanism 3; the driving member can drive the shift mechanism 3 to move and shift along a first direction through the connecting member 4; the shift mechanism 3 is provided with a first circuit board 5, and the first circuit board 5 is provided with a plurality of groups of contacts 51 arranged along the first direction, each group of contacts 51 includes a positive contact and a negative contact, and when the shift mechanism 3 moves to a gear position, at least one group of positive contacts and negative contacts can be connected to the second circuit board 6. Specifically, in this embodiment, the second circuit board 6 is fixed to the base 1 and is located above the first circuit board 5. The first circuit board 5 is provided with seven groups of contacts 51 arranged along the first direction, that is, seven gears, each gear includes two pairs of positive contacts and negative contacts, each pair of positive contacts and negative contacts can connect a circuit, and each gear shift can achieve the connection of two circuits; in other embodiments, the gears on the first circuit board 5 can be set to two, three, four, five, six or eight, ten, and each gear can be set to 3 pairs, four pairs or even ten pairs of contacts 51 to achieve the connection of multiple circuits in each gear.

[0033] When the shift mechanism 3 drives the first circuit board 5 to move, the first circuit board 5 and the second circuit board 6 generate relative displacement. At this time, the contact 51 of each gear position on the first circuit board 5 is connected or separated from the connecting piece 61 on the second circuit board 6 at the same time, so that the positive and negative circuits on the second circuit board 6 are connected or disconnected at the same time. In the process of switching gears, no redundant capacitor components are introduced, which is conducive to reducing the influence on the slope of the scanning pulse, the circuit impulse response becomes faster, and the signal trigger delay is reduced. In addition, since the positive and negative circuits are connected at the same time during the shifting process, the risk of oscillation echo in the pulse signal in the second circuit board 6 is reduced, and the quality of the output pulse signal is improved.

[0034] In this embodiment, preferably, the shift mechanism 3 includes a bearing, a sliding member 33, and a first circuit board 5 disposed on the sliding member 33. The connecting member 4 is used to connect the driving member and the sliding member 33. The driving member can drive the sliding member 33 to slide along the first direction on the bearing member through the connecting member 4. The sliding of the sliding member 33 on the bearing member drives the first circuit board 5 and the second circuit board 6 to produce relative displacement. On the one hand, the moving process is relatively stable. On the other hand, the structure is simple and the durability is good.

[0035] Regarding the setting of the bearing member, the bearing member includes two relatively arranged fixed blocks 31, and the two fixed blocks 31 are both provided with a slide groove 32 along the first direction, and the sliding member 33 is provided with two sliders, and the two sliders can slide along the two slide grooves 32 respectively. In this embodiment, regarding the matching relationship between the slider and the slide groove 32, specifically, two sliders are provided on both sides of the sliding member 33, and in addition, the openings of the two slide grooves 32 are relatively arranged. This setting allows the sliding member 33 to be sandwiched between the two fixed blocks 31, avoiding the overlapping use of the sliding member 33 and the fixed block 31, reducing the thickness of the shift mechanism 3, and facilitating the stable sliding of the sliding member 33 between the two fixed blocks 31. In addition, the setting of the slide groove 32 is convenient for design and processing, which is conducive to improving the design and processing efficiency and reducing the production cost.

[0036] Since the contact 51 protrudes from the first circuit board 5, when the first circuit board 5 and the second circuit board 6 are relatively displaced, the connecting piece 61 on the second circuit board 6 contacts and scrapes the contact 51 on the first circuit board 5 back and forth. In order to prevent the contact 51 from being scraped off, the connection piece 61 is further arranged such that the connection piece 61 and the second circuit board 6 are soldered, and an arc hook 62 is arranged at the contact end between the connection piece 61 and the contact 51, and the hook back of the arc hook 62 can contact the contact 51. This arrangement can increase the service life of the contact 51, and thus increase the service life of this embodiment. Of course, in other embodiments, a ball of conductive material can also be welded at the contact end between the connection piece 61 and the contact 51.

[0037] The driving member is a linear motor 2, and the connecting member 4 includes a screw sleeve 41 and a connecting plate 42 arranged on one side of the screw sleeve 41. The screw sleeve 41 is rotatably connected to the stud of the linear motor 2, and the connecting plate 42 is fixedly connected to the sliding member 33. The linear motor 2 drives the screw sleeve 41 to move along the axial direction of the stud through the rotating stud. Further in this embodiment, the accuracy of the linear motor 2 can be selected to be micron-level, and its movement step length and movement speed are adjustable, which can adapt to different gear quantity requirements and gear switching speed requirements.

[0038] In addition, the linear motor 2 is a standard part, and the size of the parts that match the linear motor 2 can be easily obtained according to the selection during the design process, which is conducive to improving the design efficiency.

[0039] In order to further reduce the size of the present embodiment after assembly, the first circuit board 5 is provided with an avoidance groove 52 arranged along the first direction, and the stud can move in the avoidance groove 52. In the present embodiment, the size setting of the avoidance groove 52 is specifically that the depth and width of the avoidance groove 52 need to be determined according to the relative position of the stud and the first circuit board 5, and the length of the avoidance groove 52 needs to be determined according to the relative displacement that can be generated between the first circuit board 5 and the stud. In the present embodiment, as a preferred embodiment, the width of the avoidance groove 52 is greater than the diameter of the stud, the length of the avoidance groove 52 is greater than the distance between the two end contacts 51 on the first circuit board 5, and the depth of the avoidance groove 52 is the same as the thickness of the first circuit board 5. During processing, a part of the first circuit board 5 can be removed, which is conducive to improving processing efficiency. This setting makes the present embodiment compact and can reduce the volume of the entire scanning camera shifting device. In other embodiments, the avoidance groove 52 can be set in combination with the specific structure of the connecting member 4 and the specific installation method of the connecting member 4 and the sliding member 33, and it is sufficient to ensure that the stud of the linear motor 2 does not interfere with other components during the movement above the first circuit board 5. Exemplarily, the avoidance groove 52 may also be provided on the sliding member 33, or on both the sliding member 33 and the first circuit board 5. Furthermore, a hole 11 is provided on the base 1 below the sliding member 33, the hole 11 passes through the base 1, and the width of the hole 11 is equal to the width of the sliding member 33, and the length of the hole 11 is greater than the sum of the length of the sliding member 33 and the distance between the two end contacts 51 on the first circuit board 5. This arrangement can prevent the sliding member 33 from interfering with the base 1 during the sliding process or the stud of the linear motor 2 during the rotation process.

[0040] Preferably, the linear motor 2 is fixed to the base 1 through a fixing plate 21. The fixing plate 21 includes a first plate and a second plate whose planes are perpendicular to each other. The linear motor 2 is fixed to the first plate through screws. The second plate is provided with a fixing hole. The screw passes through the fixing hole to fix the fixing plate 21 to the base 1. In this embodiment, the fixing plate 21 can be an L-shaped plate. Specifically, regarding the setting of the fixing hole, the fixing hole is a waist-shaped hole, and the opening direction of the waist-shaped hole is perpendicular to the first direction. The setting of the waist-shaped hole facilitates the adjustment of the position when installing the linear motor 2, so that the stud of the linear motor 2 can better cooperate with the connecting piece 4 fixed to the shift mechanism 3, avoiding the problem of being unable to assemble due to precision errors, and improving the installation efficiency.

[0041] Since the linear motor 2 is a metal shell, it is suspended above the base 1 to facilitate its own heat dissipation. In this embodiment, the linear motor 2 is arranged above the base 1.

[0042] In this embodiment, preferably, the scanning camera shifting device further includes a limiter 7, which can limit the travel of the shifting mechanism 3. In this embodiment, when the sliding member 33 in the shifting mechanism 3 touches the limiter 7, the shifting mechanism 3 stops moving, and the travel of the shifting mechanism 3 is set to zero at this time. The setting of the limiter 7 can prevent the shifting mechanism 3 from colliding with other parts due to a program failure during the movement process. Regarding the shifting process, in this embodiment, the sliding member 33 moves to the initial position at a faster speed, and then moves to the specified position at a slower speed to achieve the connection of all contacts 51 on the same gear with the connecting piece 61. During the shifting process, all contacts 51 are not charged, and the circuit is connected when the shifting is completed. When the sliding member 33 returns to the initial position, it touches the limiter 7, and the displacement data of the sliding member 33 is set to zero at this time, eliminating the influence of the error accumulated during the repeated action process on the shifting, and improving the accuracy of the gear to a certain extent.

[0043] A scanning camera comprises the scanning camera shifting device involved in any one of the above embodiments.

[0044] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A scanning camera shift device, characterized in that: It comprises a base (1), a driving member and a shifting mechanism (3) mounted on the base (1), and a connecting member (4) connecting the driving member and the shifting mechanism (3); the driving member can drive the shifting mechanism (3) to move and shift along a first direction via the connecting member (4); The shift mechanism (3) is provided with a first circuit board (5), and the first circuit board (5) is provided with a plurality of groups of contacts (51) arranged along the first direction, each group of the contacts (51) comprises a positive contact and a negative contact, and when the shift mechanism (3) moves to a gear position, at least one group of the positive contacts and the negative contacts can be connected to the second circuit board (6), and during the movement of the shift mechanism (3), the positive contacts and the negative contacts in each group of contacts on the first circuit board (5) are connected to or separated from the second circuit board (6) at the same time; The shift mechanism (3) comprises a bearing member, a sliding member (33) and the first circuit board (5) arranged on the sliding member (33); the connecting member (4) is used to connect the driving member and the sliding member (33); the driving member can drive the sliding member (33) to slide on the bearing member along the first direction through the connecting member (4); The bearing member comprises two fixed blocks (31) arranged opposite to each other, the two fixed blocks (31) are both provided with a slide groove (32) along the first direction, the sliding member (33) is provided with two sliders, the two sliders are capable of sliding along the two slide grooves (32); the openings of the two slide grooves (32) are arranged opposite to each other.

2. The scanning camera shifting device according to claim 1, characterized in that: The driving member is a linear motor (2), the connecting member (4) comprises a screw sleeve (41) and a connecting plate (42) arranged on one side of the screw sleeve (41), the screw sleeve (41) is rotatably connected to a stud of the linear motor (2), and the connecting plate (42) is fixedly connected to the sliding member (33).

3. The scanning camera shifting device according to claim 2, characterized in that: The first circuit board (5) is provided with an avoidance groove (52) arranged along the first direction, and the stud can move in the avoidance groove (52).

4. The scanning camera shifting device according to claim 2, characterized in that: The linear motor (2) is fixed to the base (1) via a fixing plate (21); the fixing plate (21) comprises a first plate and a second plate whose planes are perpendicular to each other; the linear motor (2) is fixed to the first plate via screws; a fixing hole is provided on the second plate; the screw passes through the fixing hole to fix the fixing plate (21) to the base (1).

5. The scanning camera shifting device according to claim 4, characterized in that: The fixing hole is a waist-shaped hole, and the opening direction of the waist-shaped hole is perpendicular to the first direction.

6. The scanning camera shifting device according to claim 4, characterized in that: The linear motor (2) is arranged above the base (1).

7. The scanning camera shifting device according to claim 1, characterized in that: The scanning camera shifting device further comprises a limiting member (7), and the limiting member (7) is capable of limiting the travel of the shifting mechanism (3).

8. A scanning camera, characterized in that: The invention comprises a scanning camera shifting device as described in any one of claims 1 to 7.

Images