阅读说明：本技术 帧率调节方法、图像记录仪、胶囊式内窥镜及系统 (Frame rate adjusting method, image recorder, capsule endoscope and system ) 是由 邬墨家 于 2019-12-05 设计创作，主要内容包括：本发明公开了一种帧率调节方法、图像记录仪、胶囊式内窥镜及胶囊式内窥镜系统。该方法包括：将多个接收单元分组,至少两个接收单位分为一组；当一组中有三个及以上接收单元时,所有接收单元不在一条直线上；实时或间隔获取至少一组接收单元接收的无线信号的强度；依据获取的强度判断胶囊式内窥镜是否移动并根据判断结果调节采集帧率。在胶囊移动时,使用较高采集帧率,有效改善漏检,在胶囊未移动时,使用较低采集帧率,延长工作时长,减少读片工作量；算法简单,不增加硬件成本,能快速跟随胶囊的移动状态调节采集帧率。(The invention discloses a frame rate adjusting method, an image recorder, a capsule endoscope and a capsule endoscope system. The method comprises the following steps: grouping a plurality of receiving units, at least two receiving units being grouped; when there are three or more receiving units in a group, all the receiving units are not on a straight line; acquiring the strength of wireless signals received by at least one group of receiving units in real time or at intervals; and judging whether the capsule type endoscope moves according to the acquired intensity and adjusting the acquisition frame rate according to the judgment result. When the capsule moves, a higher acquisition frame rate is used, so that the omission is effectively improved, and when the capsule does not move, a lower acquisition frame rate is used, so that the working time is prolonged, and the work load of reading the tablet is reduced; the algorithm is simple, the hardware cost is not increased, and the acquisition frame rate can be quickly adjusted along with the moving state of the capsule.)

1. A method for frame rate adjustment, comprising:

step S1, grouping a plurality of receiving units, at least two receiving units being grouped; when there are three or more receiving units in a group, all the receiving units are not on a straight line;

step S2, acquiring the strength of the wireless signal received by at least one group of receiving units in real time or at intervals;

and step S3, judging whether the capsule type endoscope moves according to the intensity acquired in the step S2 and adjusting the acquisition frame rate according to the judgment result.

2. The frame rate adjustment method according to claim 1, wherein the step S3 specifically includes:

s31, if the current intensity of any receiving unit is changed compared with the intensity at the last moment, the capsule type endoscope is considered to move; when only two receiving units exist in one group, the current intensity of the two receiving units is not changed compared with the intensity at the last moment, but the current intensity of the signal receiving units in the other groups is changed compared with the intensity at the last moment, and the capsule type endoscope is considered to move;

judging whether the current acquisition frame rate of the capsule endoscope is the preset highest acquisition frame rate, if so, controlling the capsule endoscope to continue acquiring pictures at the current acquisition frame rate, and returning to the step S2; if the current acquisition frame rate is not the highest acquisition frame rate, increasing the acquisition frame rate of the capsule type endoscope, and returning to the step S2;

s32, if the current intensity of all the receiving units is not changed compared with the intensity at the previous moment, the capsule type endoscope is considered not to move;

judging whether the current acquisition frame rate of the capsule endoscope is the preset highest acquisition frame rate, if so, reducing the acquisition frame rate of the capsule endoscope, and returning to the step S2; and if the current acquisition frame rate is not the highest acquisition frame rate, controlling the capsule endoscope to continuously acquire the pictures at the current acquisition frame rate, and returning to the step S2.

3. The frame rate adjustment method of claim 2, wherein a change ratio threshold is set, an absolute value of a difference between the current intensity and the intensity at the previous time is calculated, and a ratio of the absolute value to the intensity at the previous time is calculated;

if the obtained ratio is less than or equal to the change ratio threshold, the current intensity is considered to have no change compared with the intensity at the previous moment; and if the obtained ratio is larger than the change ratio threshold value, the current intensity is considered to have a change compared with the intensity at the last moment.

4. The frame rate adjustment method according to claim 1, wherein in step S1, any two receiving units respectively located on both sides of the human body and oppositely disposed are used as a group in the plurality of wireless receiving units.

5. The frame rate adjustment method as claimed in claim 4, wherein in step S2, the wireless signal strengths of the two receiving units in the group of the receiving unit with the strongest signal strength are obtained.

6. The method of claim 5, wherein the receiving unit with the strongest signal strength is the first receiving unit, and the other receiving unit in the group with the receiving unit with the strongest signal strength is the second receiving unit;

if the current intensity of the signals received by the first receiving unit is smaller than the intensity at the previous moment and the current intensity of the signals received by the second receiving unit is larger than the intensity at the previous moment, the capsule type endoscope is considered to move, otherwise, the capsule type endoscope is considered not to move.

7. An image recorder is characterized by comprising a plurality of receiving units, a signal intensity detection unit, a main control unit, a first radio frequency module, a transmitting unit and a storage unit, wherein the receiving units can receive wireless signals sent by a capsule type endoscope;

the signal intensity detection unit acquires the wireless signal intensity of all or part of the receiving units simultaneously or in a time-sharing manner, and transmits the intensity signals to the main control unit and the storage unit;

the receiving unit receives current acquisition frame rate information and image information sent by the capsule type endoscope, transmits the current acquisition frame rate information and the image information to the first radio frequency module, decodes the current acquisition frame rate information and the image information and then transmits the decoded current acquisition frame rate information and the decoded image information to the main control unit;

the main control unit receives current frame rate acquisition information sent by the first radio frequency module and an intensity signal sent by the signal intensity detection unit, and outputs an acquisition frame rate adjustment instruction according to the frame rate adjustment method of any one of claims 1 to 6 in the whole or part of the working process of the capsule endoscope, wherein the acquisition frame rate adjustment instruction is compiled by the first radio frequency module and then sent to the capsule endoscope through the transmitting unit.

8. A capsule type endoscope is characterized by comprising a capsule antenna, a second radio frequency module, a processor and an image acquisition module;

the processor acquires the image signal acquired by the image acquisition module and the current acquisition frame rate and transmits the image signal and the current acquisition frame rate to the second radio frequency module for compiling, and the second radio frequency module sends the compiled data to the image recorder of claim 6 through the capsule antenna;

the capsule antenna receives an acquisition frame rate adjusting instruction sent by an external image recorder, transmits the acquisition frame rate adjusting instruction to the second radio frequency module, decodes the acquisition frame rate adjusting instruction and outputs the decoded acquisition frame rate adjusting instruction to the processor, and the processor adjusts the image acquisition frame rate of the image acquisition module according to the acquisition frame rate adjusting instruction.

9. An endoscope system comprising the image recorder of claim 7 and the capsule endoscope of claim 8;

the capsule type endoscope wirelessly sends an image signal and a current acquisition frame rate to an image recorder;

the image recorder sends an acquisition frame rate adjusting instruction to the capsule type endoscope according to the signal intensity change of the receiving unit, and the capsule type endoscope adjusts the image acquisition frame rate according to the acquisition frame rate adjusting instruction.

Technical Field

The invention relates to the field of medical instruments, in particular to a frame rate adjusting method, an image recorder, a capsule endoscope and a capsule endoscope system.

Background

The capsule endoscope system is composed of a capsule endoscope, an image recorder and image software, wherein the capsule endoscope shoots pictures at a fixed speed, converts the pictures into wireless signals and sends the wireless signals to the image recorder, and the image recorder converts the received wireless signals into picture information and stores or processes the picture information.

When the capsule type endoscope collects and transmits pictures, the power consumption is high, a large amount of electric quantity is consumed for collecting and transmitting excessive pictures, but the capacity of a battery in the capsule type endoscope is constant, so that the service life of the battery is influenced. In the prior art, a capsule endoscope (capsule for short) usually acquires pictures at a fixed frame rate, however, the capsule does not move all the time in a human body, sometimes the posture and the position of the capsule may not change within a certain time, and the acquisition and transmission of the pictures at a fixed speed cause the problem of transmitting more repeated pictures, and the repeated pictures do not bring benefits to picture reading, but cause the capsule to waste electric quantity and increase the burden of a picture reading person. If the capsule can stop or acquire pictures and transmit at a low speed under the condition that the position is not changed, the pictures are acquired and transmitted at a high speed only when the position is changed, and great help is brought to the improvement of the working time of the capsule and the film reading efficiency.

Disclosure of Invention

The invention aims to at least solve the technical problems in the prior art, and particularly provides a frame rate adjusting method, an image recorder, a capsule endoscope and a capsule endoscope system.

In order to achieve the above object, according to a first aspect of the present invention, there is provided a frame rate adjustment method comprising:

step S1, grouping a plurality of receiving units, at least two receiving units being grouped; when there are three or more receiving units in a group, all the receiving units are not on a straight line;

step S2, acquiring the strength of the wireless signal received by at least one group of receiving units in real time or at intervals;

and step S3, judging whether the capsule type endoscope moves according to the intensity acquired in the step S2 and adjusting the acquisition frame rate according to the judgment result.

The beneficial effects of the above technical scheme are: judging whether the capsule moves or not according to the signal strength change of part of the receiving units, further adjusting the image acquisition frame rate, reducing energy loss, prolonging the working time of the capsule and reducing the workload of a tablet reading person; the method makes full use of the structural characteristics of a plurality of receiving units in the capsule type endoscope system, does not increase the hardware cost, can quickly adjust the acquisition frame rate along with the change of the moving state of the capsule, and has small delay.

In a preferred embodiment of the present invention, the step S3 specifically includes:

s31, if the current intensity of any receiving unit is changed compared with the intensity at the last moment, the capsule type endoscope is considered to move; when only two receiving units exist in one group, the current intensity of the two receiving units is not changed compared with the intensity at the last moment, but the current intensity of the signal receiving units in the other groups is changed compared with the intensity at the last moment, and the capsule type endoscope is considered to move;

judging whether the current acquisition frame rate of the capsule endoscope is the preset highest acquisition frame rate, if so, controlling the capsule endoscope to continue acquiring pictures at the current acquisition frame rate, and returning to the step S2; if the current acquisition frame rate is not the highest acquisition frame rate, increasing the acquisition frame rate of the capsule type endoscope, and returning to the step S2;

s32, if the current intensity of all the receiving units is not changed compared with the intensity at the previous moment, the capsule type endoscope is considered not to move;

judging whether the current acquisition frame rate of the capsule endoscope is the preset highest acquisition frame rate, if so, reducing the acquisition frame rate of the capsule endoscope, and returning to the step S2; and if the current acquisition frame rate is not the highest acquisition frame rate, controlling the capsule endoscope to continuously acquire the pictures at the current acquisition frame rate, and returning to the step S2.

The beneficial effects of the above technical scheme are: when the capsule moves, the images are collected at a higher collection frame rate, so that the omission can be effectively improved, when the capsule does not move, the images are collected at a lower collection frame rate, the energy loss is low, the working time of the capsule can be prolonged, and the workload of a tablet reading person is reduced. In the process of judging whether the capsule moves, the applied algorithm is simple, the structural characteristics of a plurality of receiving units in the capsule type endoscope system are fully utilized, and the hardware cost is not increased.

In a preferred embodiment of the invention, a change proportion threshold is set;

calculating the absolute value of the difference value between the current intensity and the intensity at the previous moment, calculating the ratio of the absolute value to the intensity at the previous moment, and if the obtained ratio is less than or equal to the change ratio threshold, determining that no change exists between the current intensity and the intensity at the previous moment; and if the obtained ratio is larger than the change ratio threshold value, the current intensity is considered to have a change compared with the intensity at the last moment.

The beneficial effects of the above technical scheme are: and a change proportion threshold is set, so that misjudgment caused by small change can be effectively avoided, and the robustness of the method is enhanced.

In a preferred embodiment of the present invention, in step S1, any two of the plurality of radio receiving units are respectively located on both sides of the human body and are disposed to face each other as a set.

The beneficial effects of the above technical scheme are: when the capsule moves, the signal intensity of the two receiving units changes more obviously, and the sensitivity to the signal intensity change is favorably improved.

In a preferred embodiment of the present invention, in step S2, the wireless signal strengths of the two receiving units in the group of the receiving unit with the strongest signal strength are obtained.

The beneficial effects of the above technical scheme are: the signal intensity variation is large, and the sensitivity to the signal intensity variation is further improved.

In a preferred embodiment of the present invention, the receiving unit with the strongest current signal strength is taken as a first receiving unit, and the other receiving unit of the group in which the receiving unit with the strongest current signal strength is located is taken as a second receiving unit;

if the current intensity of the signals received by the first receiving unit is smaller than the intensity at the previous moment and the current intensity of the signals received by the second receiving unit is larger than the intensity at the previous moment, the capsule type endoscope is considered to move, otherwise, the capsule type endoscope is considered not to move.

The beneficial effects of the above technical scheme are: provides a simpler and more convenient method for judging the movement of the capsule.

In order to achieve the above object, according to a second aspect of the present invention, there is provided an image recorder comprising a plurality of receiving units capable of receiving wireless signals from a capsule type endoscope, a signal strength detecting unit, a main control unit, a first radio frequency module, a transmitting unit, and a storage unit;

the signal intensity detection unit acquires the wireless signal intensity of all or part of the receiving units simultaneously or in a time-sharing manner, and transmits the intensity signals to the main control unit and the storage unit;

the receiving unit receives current acquisition frame rate information and image information sent by the capsule type endoscope, transmits the current acquisition frame rate information and the image information to the first radio frequency module, decodes the current acquisition frame rate information and the image information and then transmits the decoded current acquisition frame rate information and the decoded image information to the main control unit;

the main control unit receives current acquisition frame rate information sent by the first radio frequency module and an intensity signal sent by the signal intensity detection unit, and outputs an acquisition frame rate adjusting instruction according to the frame rate adjusting method in the whole or partial working process of the capsule type endoscope, and the acquisition frame rate adjusting instruction is compiled by the first radio frequency module and then sent to the capsule type endoscope through the transmitting unit.

The beneficial effects of the above technical scheme are: the image recorder judges whether the capsule moves or not according to the signal strength change of part of the receiving units, so as to adjust the image acquisition frame rate, acquire images at a higher acquisition frame rate when the capsule moves, effectively improve omission, acquire images at a lower acquisition frame rate when the capsule does not move, reduce energy loss, prolong the working time of the capsule and reduce the workload of a tablet reader; in the process of judging whether the capsule moves, the applied algorithm is simple, the structural characteristics of a plurality of receiving units are fully utilized, the hardware cost is not increased, the acquisition frame rate can be quickly adjusted along with the change of the moving state of the capsule, and the delay is small.

In order to achieve the above object, according to a third aspect of the present invention, there is provided a capsule endoscope comprising a capsule antenna, a second radio frequency module, a processor and an image acquisition module;

the processor acquires the image signal acquired by the image acquisition module and the current acquisition frame rate and transmits the image signal and the current acquisition frame rate to the second radio frequency module for compiling, and the second radio frequency module sends the compiled data to the image recorder through the capsule antenna;

the capsule antenna receives an acquisition frame rate adjusting instruction sent by an external image recorder, transmits the acquisition frame rate adjusting instruction to the second radio frequency module, decodes the acquisition frame rate adjusting instruction and outputs the decoded acquisition frame rate adjusting instruction to the processor, and the processor adjusts the image acquisition frame rate of the image acquisition module according to the acquisition frame rate adjusting instruction.

The beneficial effects of the above technical scheme are: the acquisition frame rate of the capsule endoscope can be adjusted along with the moving state of the capsule endoscope, when the capsule moves, images are acquired at a higher acquisition frame rate, the missing inspection can be effectively improved, when the capsule does not move, the images are acquired at a lower acquisition frame rate, the energy loss is reduced, the working time of the capsule is prolonged, and the workload of a film reading person is reduced; the acquisition frame rate can be adjusted quickly along with the change of the moving state of the capsule, and the delay is small.

In order to achieve the above object of the present invention, according to a fourth aspect of the present invention, there is provided an endoscope system comprising the image recorder of the present invention and the capsule endoscope of the present invention;

the capsule type endoscope wirelessly sends an image signal and a current acquisition frame rate to an image recorder;

the image recorder sends an acquisition frame rate adjusting instruction to the capsule type endoscope according to the signal intensity change of the receiving unit, and the capsule type endoscope adjusts the image acquisition frame rate according to the acquisition frame rate adjusting instruction.

The beneficial effects of the above technical scheme are: the system judges whether the capsule moves according to the signal strength change of part of receiving units, so as to adjust the image acquisition frame rate, when the capsule moves, the image is acquired at a higher acquisition frame rate, so that the omission can be effectively improved, when the capsule does not move, the image is acquired at a lower acquisition frame rate, the energy loss is reduced, the capsule working time is prolonged, and the workload of a tablet reading person is reduced; in the process of judging whether the capsule moves, the applied algorithm is simple, the structural characteristics of a plurality of receiving units are fully utilized, the hardware cost is not increased, the acquisition frame rate can be quickly adjusted along with the change of the moving state of the capsule, and the delay is small.

Drawings

FIG. 1 is a flow chart illustrating a frame rate adjustment method according to an embodiment of the present invention;

FIG. 2 is a flow chart of a frame rate adjustment method in an application scenario;

fig. 3 is a schematic diagram of signal strength variation of a receiving unit during movement of a capsule endoscope in an application scenario, wherein fig. 3(a) is a schematic diagram of signal strength of the receiving unit at a moment before the movement of the capsule endoscope, and fig. 3(b) is a schematic diagram of signal strength of the receiving unit at present after the movement of the capsule endoscope;

FIG. 4 is a hardware block diagram of an image recorder in accordance with an embodiment of the present invention;

FIG. 5 is a hardware block diagram of a capsule type endoscope in an embodiment of the present invention;

fig. 6 is a hardware block diagram of a capsule type endoscope system in an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

The present invention discloses a frame rate adjusting method, and in a preferred embodiment, a schematic flow chart thereof is shown in fig. 1, and the method includes:

step S1, grouping a plurality of receiving units, at least two receiving units being grouped; when there are three or more receiving units in a group, all the receiving units are not on a straight line;

step S2, acquiring the strength of the wireless signal received by at least one group of receiving units in real time or at intervals;

and step S3, judging whether the capsule type endoscope moves according to the intensity acquired in the step S2 and adjusting the acquisition frame rate according to the judgment result.

In this embodiment, the receiving unit may be a receiving antenna, and the plurality of receiving units form an antenna array.

In this embodiment, in step S1, at least two receiving units at any position may be used as a group, each receiving antenna may receive a wireless signal transmitted from the capsule endoscope, and the two receiving units divided into a group may be located on the same side or different sides of the capsule endoscope.

In the present embodiment, the intensity of the wireless signal received by the receiving unit is related to the distance between the receiving antenna and the capsule under the condition of no shielding or shielding, and the intensity of the wireless signal is weaker as the distance is longer and the intensity of the wireless signal is stronger as the distance is shorter.

In the present embodiment, in step S2, the interval time is preferably, but not limited to, 0.1 to 3 seconds.

In the present embodiment, in step S1, when there are three or more receiving units in a group, all the receiving units are not on the same straight line, and it is possible to effectively avoid erroneous judgment caused when the capsule endoscope moves on the edge of the intersecting curved surface of two intersecting spherical surfaces with the two receiving units belonging to the same group as the spherical center.

In a preferred embodiment, step S3 specifically includes:

s31, if the current intensity of any receiving unit is changed compared with the intensity at the last moment, the capsule type endoscope is considered to move; when only two receiving units exist in one group, the current intensity of the two receiving units is not changed compared with the intensity at the last moment, but the current intensity of the signal receiving units in the other groups is changed compared with the intensity at the last moment, and the capsule type endoscope is considered to move;

judging whether the current acquisition frame rate of the capsule endoscope is the preset highest acquisition frame rate, if so, controlling the capsule endoscope to continue acquiring pictures at the current acquisition frame rate, and returning to the step S2; if the current acquisition frame rate is not the highest acquisition frame rate, increasing the acquisition frame rate of the capsule type endoscope, and returning to the step S2;

s32, if the current intensity of all the receiving units is not changed compared with the intensity at the previous moment, the capsule type endoscope is considered not to move;

judging whether the current acquisition frame rate of the capsule endoscope is the preset highest acquisition frame rate, if so, reducing the acquisition frame rate of the capsule endoscope, and returning to the step S2; and if the current acquisition frame rate is not the highest acquisition frame rate, controlling the capsule endoscope to continuously acquire the pictures at the current acquisition frame rate, and returning to the step S2.

In the present embodiment, in step S3, the current strength of the signal receiving units in the remaining groups is the strength of the receiving units other than the group of which only two receiving units currently exist among the receiving units whose signal strengths have been acquired in step S2. Preferably, if only one group of receiving units is obtained in step S2, it can be considered that there is no change in the current signal strength of the remaining receiving units compared to the signal strength at the previous time.

In a preferred embodiment, a change proportion threshold is set;

calculating the absolute value of the difference value between the current intensity and the intensity at the previous moment, calculating the ratio of the absolute value to the intensity at the previous moment, and if the obtained ratio is less than or equal to the change ratio threshold, determining that no change exists between the current intensity and the intensity at the previous moment; and if the obtained ratio is larger than the change ratio threshold value, the current intensity is considered to have a change compared with the intensity at the last moment.

In the present embodiment, it is preferred that,

in the present embodiment, the range of the change ratio threshold value is preferably 0 to 0.3.

In this embodiment, it is preferable that the above-described procedure of determining a change in signal strength is also applied to the remaining group of receiving units, and if the ratio of the absolute value of the difference between the current signal strength of the receiving unit and the signal strength at the previous time to the signal strength at the previous time is equal to or less than the change ratio threshold, it is considered that there is no change in the current signal strength of the receiving unit from the signal strength at the previous time, and if the ratio of the absolute value of the difference between the current signal strength of the receiving unit and the signal strength at the previous time to the signal strength at the previous time is greater than the change ratio threshold, it is considered that there is a change in the current signal strength of the receiving unit from the signal strength at the previous time, for any of the remaining group of receiving units.

In a preferred embodiment, as shown in fig. 3, in step S1, any two of the plurality of wireless receiving units are respectively located on both sides of the human body and are disposed to face each other as a set.

In a preferred embodiment, as shown in fig. 3, in step S2, the wireless signal strengths of the two receiving units in the group where the receiving unit with the strongest signal strength is located are obtained.

In a preferred embodiment, as shown in fig. 3, the receiving unit with the strongest current signal strength is taken as the first receiving unit, and the other receiving unit in the group where the receiving unit with the strongest current signal strength is located is taken as the second receiving unit;

if the current intensity of the signals received by the first receiving unit is smaller than the intensity at the previous moment and the current intensity of the signals received by the second receiving unit is larger than the intensity at the previous moment, the capsule type endoscope is considered to move, otherwise, the capsule type endoscope is considered not to move.

In the present embodiment, as seen from the change process of the signal strength received by the first receiving unit and the second receiving unit reflected in fig. 3(a) and 3(b), the current strength of the signal received by the first receiving unit is smaller than the strength at the previous time, and the current strength of the signal received by the second receiving unit is larger than the strength at the previous time, so that the capsule endoscope is considered to be moving.

In an application scenario of the present invention, a schematic flow chart of the frame rate adjusting method is shown in fig. 2, and two receiving units located at two sides of a human body and arranged oppositely are selected as a group and are respectively marked as a first receiving unit and a second receiving unit, where the first receiving unit generally selects a receiving unit closer to the main receiving unit, and the second receiving unit generally selects a receiving unit farther from the main receiving unit.

In the application scenario, the first receiving unit is selected by the signal strength of the capsule signal received by each receiving unit, and when the capsule is not changed at the current position, the signal strength of the capsule received by the first receiving unit is strong and stable, and similarly, the signal received by the second receiving unit is weaker and also stable. When the signal intensity of the two receiving units is kept stable, the capsule is not moved in vivo, the frame rate of the currently received picture is judged, if the current frame rate is the highest frame rate, an instruction for reducing the acquisition frame rate of the capsule is generated, the transmitting unit of the image recorder sends the instruction for reducing the acquisition frame rate to the capsule end, and after the capsule receives the instruction, the image acquisition frame rate is reduced, the shooting of invalid pictures is reduced, and meanwhile, the power consumption of the capsule can also be reduced. If the signal intensity of the main receiving unit begins to weaken and the signal intensity of the auxiliary receiving unit begins to strengthen, the fact that the capsule moves in the body is indicated, the main control unit can judge the frame rate of the currently received picture again, if the frame rate is not the highest collecting frame rate, an instruction for improving the collecting frame rate is generated, and the instruction is transmitted to the capsule end by the transmitting unit of the recorder, so that the collecting frame rate of the capsule is improved, and the phenomenon that missed shooting is caused when the motion shooting is carried out due to the fact that the collecting frame rate of the capsule is low is avoided.

The invention also discloses an image recorder, in a preferred embodiment, the hardware block diagram of which is shown in fig. 4, and the image recorder comprises a plurality of receiving units capable of receiving wireless signals sent by the capsule type endoscope, a signal intensity detection unit, a main control unit, a first radio frequency module, a transmitting unit and a storage unit;

the signal intensity detection unit acquires the wireless signal intensity of all or part of the receiving units simultaneously or in a time-sharing manner and transmits the intensity signals to the main control unit and the storage unit;

the receiving unit receives current acquisition frame rate information and image information sent by the capsule type endoscope, transmits the current acquisition frame rate information and the image information to the first radio frequency module, decodes the current acquisition frame rate information and the image information and then transmits the decoded current acquisition frame rate information and the decoded image information to the main control unit;

the main control unit receives current acquisition frame rate information sent by the first radio frequency module and an intensity signal sent by the signal intensity detection unit, and outputs an acquisition frame rate adjusting instruction according to the frame rate adjusting method in the whole or partial working process of the capsule type endoscope, and the acquisition frame rate adjusting instruction is compiled by the first radio frequency module and then sent to the capsule type endoscope through the transmitting unit.

In this embodiment, the receiving unit is preferably a receiving antenna, the transmitting unit is preferably a transmitting antenna, and the transmitting antenna and the receiving antenna can be shared.

In this embodiment, the first rf module is configured to decode a signal received by the receiving unit, and send the decoded data to the main control unit; and the main control unit is also used for receiving the instruction data to be sent output by the main control unit, coding the instruction data to be sent, and transmitting the coded data through the transmitting unit.

In this embodiment, preferably, the signal strength detecting unit includes a plurality of signal strength detecting sub-units corresponding to the receiving units one by one, one signal strength detecting sub-unit is allocated to each receiving unit, and the output end of the receiving unit is connected to the input end of the signal strength detecting sub-unit, so that the signal strengths of the plurality of receiving units can be obtained simultaneously.

In this embodiment, preferably, as shown in fig. 4, the signal strength detecting unit includes 1 common signal strength detecting subunit, and is provided with a multi-channel switch that selects one more, and the main control unit controls the multi-channel switch to turn on each channel in turn, so as to obtain the signal strengths of the multiple receiving units in a time-sharing manner.

In this embodiment, the signal strength detecting subunit can be implemented by using the technical solution disclosed in the chinese patent with the publication number CN205265705U, CN205139255U, or CN105259428B in the prior art.

In this embodiment, preferably, the image recorder further includes a positioning calculation module, a first signal processing module, a storage module, a display module, a power supply module, a USB transmission module, and a battery. The image recorder receives wireless signals through an antenna array, the antenna array is composed of a plurality of antennas, the antennas receive the signals, the radio frequency modules down-convert the radio frequency signals to baseband signals, the baseband signals are processed through a first signal processing module, the baseband signals are restored to image signals, and the image signals are stored in a storage unit.

The invention also discloses a capsule endoscope, in a preferred embodiment, the hardware block diagram of which is shown in fig. 5, and the capsule endoscope comprises a capsule antenna, a second radio frequency module, a processor and an image acquisition module;

the processor acquires the image signal acquired by the image acquisition module and the current acquisition frame rate and transmits the image signal and the current acquisition frame rate to the second radio frequency module for compiling, and the second radio frequency module transmits the compiled data to the image recorder through the capsule antenna;

the capsule antenna receives an acquisition frame rate adjusting instruction sent by an external image recorder, transmits the acquisition frame rate adjusting instruction to the second radio frequency module, decodes the acquisition frame rate adjusting instruction and outputs the decoded acquisition frame rate adjusting instruction to the processor, and the processor adjusts the image acquisition frame rate of the image acquisition module according to the acquisition frame rate adjusting instruction.

In this embodiment, the capsule endoscope preferably further includes a power supply module, a battery, a second signal processing module, and a position information module. The capsule type endoscope collects images through the image collecting module, converts optical signals into electric signals, transmits the electric signals to the second signal processing module for processing, transmits the electric signals to the second radio frequency module, and radiates the signals out through the capsule antenna after up-conversion.

The invention also discloses an endoscope system, in a preferred embodiment, the hardware block diagram of which is shown in fig. 6, and the endoscope system comprises the image recorder and the capsule endoscope;

the capsule type endoscope wirelessly transmits an image signal and a current acquisition frame rate to an image recorder;

the image recorder sends an acquisition frame rate adjusting instruction to the capsule type endoscope according to the signal intensity change of the receiving unit, and the capsule type endoscope adjusts the image acquisition frame rate according to the acquisition frame rate adjusting instruction.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.