WO2022016736A1

WO2022016736A1 - Communication method for capsule endoscope

Info

Publication number: WO2022016736A1
Application number: PCT/CN2020/125745
Authority: WO
Inventors: 宁浩; 王建平; 阚述贤
Original assignee: 深圳市资福医疗技术有限公司
Priority date: 2020-07-21
Filing date: 2020-11-02
Publication date: 2022-01-27
Also published as: CN111885355A

Abstract

Disclosed in the present invention is a communication method for a capsule endoscope. According to the reality that budgets of an uplink and a downlink of a radio frequency unit of a capsule endoscope system are different, and the characteristic of a large difference in the size of image data and parameter information from the capsule endoscope, when the operating frequency is the same, a radio frequency bandwidth is flexibly adjusted, such that the radio frequency transceiving reliability of the capsule endoscope system is improved; and when the operating frequency is different, a center frequency is flexibly set to perform data transmission, broadband transmission of the image data is performed, and narrowband transmission of the parameter information is performed, such that data transmission is reliable and stable; in addition, a parallel processing method is used for data processing, so that the transmission efficiency is high, and simultaneous transmission of the image data and the parameter information is ensured, thereby facilitating accurate capsule locating.

Description

A kind of communication method of capsule endoscope

technical field

The invention relates to the field of communication, in particular to a communication method for a capsule endoscope.

Background technique

Capsule endoscopy, as an emerging gastrointestinal inspection method, is gradually being accepted by the market. After the capsule endoscope is swallowed orally, it passes through the esophagus, stomach, small intestine and large intestine accordingly. For different abdominal parts, due to the shape of the part , The size of the channel is different, and the speed of the capsule passing is also different. In order to clearly capture the image of the body tissue, it is convenient for the doctor to accurately diagnose whether there is a disease through the image. The capsule endoscope needs to use different shooting frame rates according to different abdominal parts. . For the common adjustment of the frame rate of capsule endoscope, on the one hand, the data can be obtained through its own built-in sensor, and the judgment adjustment can be carried out in combination with the software algorithm; .

With the development and maturity of integrated circuit technology, various micro-sensors have been used in capsule endoscopes one after another, such as magnetic sensors, pressure sensors, IMU (Inertial Measurement Unit, Inertial Measurement Unit), etc., which enables the capsule endoscope to achieve accurate positioning in the human body, by reading the parameter information of the capsule endoscope multiple times, and reading the angular velocity and acceleration information in the IMU data at the same time, Combined with the magnet position information of the external magnetic control equipment, the accurate position of the capsule endoscope in the human body can be obtained through the software algorithm. During the process of measurement and calculation, the capsule endoscope continuously collects parameter information and captures in vivo images.

However, due to the built-in MCU (Micro Control Unit, micro-control unit) uses serial processing for image information processing and parameter information, and the working frequency band or bandwidth used for radio frequency signal transmission is also a fixed value. The image frame rate of the capsule endoscope is 2~35 frames/ Between seconds, the data collection frequency of the sensor is usually ≥ 20 times/second; this leads to low data processing efficiency and low reliability of wireless transmission of the capsule endoscope, and the data interaction with external storage devices and image processing devices cannot be achieved. To meet the requirements, it is difficult to realize the functions of timely adjustment and accurate positioning of the frame rate of the capsule endoscope.

Therefore, it is necessary to develop a new communication method for capsule endoscope to improve the data processing efficiency and transmission reliability, to ensure the simultaneous transmission of image data and parameter information, which is conducive to the precise positioning of the capsule and enhances the competitiveness of the product.

technical problem

In order to solve the insufficiency of the data processing efficiency and transmission reliability of the capsule endoscope, the present invention proposes an image method of the capsule endoscope.

technical solutions

In a first aspect, the present invention provides a communication method for a capsule endoscope, including a capsule endoscope and an external signal transceiving device, wherein the capsule endoscope includes an electrically connected camera unit, a power supply unit, a sensor unit, and an image processing unit and radio frequency transmission unit, including the following steps:

Capsule endoscope starts sensor initialization and image capture;

Determine the type of data that needs to be transmitted by radio frequency, if it is determined that image data needs to be transmitted, start broadband transmission of image data, and if it is determined that parameter information needs to be transmitted, start narrowband transmission;

Further determine whether the data transmission is completed, if the data transmission is completed, further determine whether to receive an external device control command, if it is necessary to receive an external device control command, receive and execute the external device control command, and adjust the operating parameters of the capsule endoscope ;

If not, continue to collect image data and parameter information.

Further, the wideband bandwidth is ≥1MHz, and the narrowband bandwidth is less than or equal to 200KHz.

Further, the image data and parameter information are transmitted using the same working frequency.

Further, the image frame rate of the capsule endoscope is between 2 and 35 frames per second.

Further, the parameter information is data whose data packet is less than or equal to 1KB.

In a second aspect, the present invention provides a communication method for a capsule endoscope, including a capsule endoscope and a signal transceiving device, wherein the capsule endoscope includes an electrically connected camera unit, a power supply unit, a sensor unit, an image processing unit and a The radio frequency transmission unit further includes the following steps:

The capsule endoscope starts sensor initialization and image capture, and obtains parameter information;

Determine the type of data that needs to be transmitted by radio frequency;

If it is judged that image data needs to be transmitted, set the broadband center frequency and start the broadband transmission of image data;

If it is determined that the parameter information needs to be transmitted, set the narrowband center frequency and start the narrowband transmission parameter information;

Further judge whether the transmission of image data or parameter information is completed, and if it is necessary to continue to transmit data, return to continue the collection of image data and parameter information;

When it is judged that the transmission of the image data and parameter information is completed, it is further judged whether to receive an external device control command, and if it is necessary to receive an external device control command, receive and execute the external device control command;

Then continue to perform the acquisition of image data and parameter information.

Further, the image data and parameter information are transmitted using different operating frequencies.

beneficial effect

By adopting the communication method of the present invention, according to the actual situation of different budgets of the upper and lower links of the radio frequency unit of the capsule endoscope system, and the characteristics of the large difference in the amount of image information and sensor information of the capsule endoscope, under the same working frequency, flexible operation can be achieved. Adjusting the radio frequency bandwidth improves the reliability of radio frequency transmission and reception of the capsule endoscope system; in the case of different operating frequencies, the center frequency can be flexibly set for data transmission, and different data are transmitted in different channels, and the data transmission is reliable and stable. The processing adopts the parallel processing method, and the transmission efficiency is high.

Description of drawings

Figure 1: A flow chart of a first embodiment of the present invention.

Figure 2: A flow chart of a second embodiment of the present invention.

Fig. 3: Schematic diagram of serial data processing of the present invention.

Figure 4: Schematic diagram of data parallel processing of the present invention.

Fig. 5: Schematic diagram of the composition of the capsule endoscope system of the present invention.

Fig. 6 is a schematic diagram of the composition of the magnetic control capsule endoscope system of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

Please refer to the flowchart of the first embodiment of the present invention in FIG. 1. The data communication method of the present invention uses the same working frequency and different bandwidths to communicate data. When the capsule endoscope enters the human body in step 101, the capsule endoscope in step 102 The endoscope synchronously initializes the sensor and starts image capture, step 103 further determines whether to start sending image data, if it is determined that image data needs to be transmitted, step 104 performs broadband transmission of the image data; The data is equal to 1KB. At this time, step 105 starts the narrowband transmission, and transmits the parameter information through the radio frequency unit. When the data is transmitted in step 104 or step 105, step 106 further judges whether the data transmission is completed. If the data transmission is completed, then enter step 107 , judging whether it is necessary to receive an external device control command, so as to further determine whether to adjust the operating parameters of the capsule endoscope. The operating parameters are adjusted; if it is determined in step 107 that it is not necessary to receive a control command of an external device, then proceed to step 108 to continue collecting image data and parameter information.

In the first embodiment, due to the limitation of the size of the capsule endoscope, the receiving sensitivity of the capsule endoscope is usually low. , by reducing the bandwidth, the receiving sensitivity of the capsule can be improved, which can better ensure that the capsule receives data correctly; on the other hand, in the actual medical environment, since there may be cases where patients gather together for examination, for the image receiving memory, due to To improve the sensitivity of the capsule, under the condition that the capsule can be received normally, the transmit power can be appropriately reduced to reduce the risk of the image receiving memory interfering with other devices. The receiving sensitivity S of the radio frequency unit adopts the formula: S=-174+10lgBW+NF+SNR , where BW is the bandwidth, NF is the noise figure, and SNR is the signal-to-noise ratio.

In the first embodiment of the present invention, the same operating frequency and different bandwidths are used for data communication. For example, the operating frequency or center frequency is set to 434MHz, the operating frequency band with a wideband bandwidth of 1MHz is 433.5MHz~434.5MHz, and the narrowband bandwidth is 100KHz The working frequency band is: 433.95MHz~434.05MHz.

Please refer to the flowchart of the second embodiment of the present invention in FIG. 2. When different operating frequencies and different bandwidths are used for data communication, since the frame rate of images captured by the capsule endoscope is usually between 2 and 35 fps, the readings of other sensors The frequency is very high, and even real-time data communication with external magnetron equipment is required. At this time, it needs to be solved by different operating frequencies and different bandwidths, such as setting a center frequency of 2.48GHz, a broadband transmission channel with a broadband bandwidth of 6MHz and a center frequency of 433.1MHz, narrowband The narrowband channel scheme with a bandwidth of 100KHz is used for data communication. The broadband working frequency band here is 2.45GHz~2.411GHz, and the narrowband working frequency band is 433.05MHz~433.15MHz.

In particular, in order to prevent the problem of adjacent frequency interference, and at the same time to reduce the difficulty and cost of hardware design, the communication method of the present invention preferentially selects different frequency bands for data communication.

In step 201, the capsule endoscope starts sensor initialization and image capture, step 202 starts to capture images, and synchronously acquires parameter information, which is data with a data packet less than or equal to 1KB, and then step 203 determines whether image data needs to be transmitted, if If it is judged that data transmission is required, step 204 sets the broadband center frequency to f1, and starts the broadband transmission of image data; if step 203 determines that the parameter information needs to be transmitted, then enter step 205 to start the narrowband transmission parameter information, and set the narrowband center frequency of the capsule endoscope to f2, in the process of image data and parameter information transmission, step 206 further judges whether the data transmission is completed, if it is necessary to continue to transmit image data and parameter information, then return to step 201 to continue to execute the collection of image data and parameter information; When the transmission of the sum parameter information is completed, go to step 207 to further judge whether to receive the external device control command, if so, step 209 receives the external device control command to adjust the operating parameters of the capsule endoscope; if not, step 208 continues to execute the image data and Collection of parameter information.

In particular, in the above-mentioned first and second embodiments of the present invention, the wideband bandwidth is ≥1 MHz, and the narrowband bandwidth is ≤200 KHz.

Please refer to FIG. 3 , a schematic diagram of serial data processing in the present invention. The usual capsule endoscope MCU is a serial processing mechanism. For the data of different sensors, the data is read at different time points, and the transmission time of the entire parameter information is t0 =T0+T1+...Tn, the capsule endoscope has low processing efficiency for image data and parameter information.

Please refer to the schematic diagram of data parallel processing in FIG. 4. In order to solve the shortage of the serial processing mechanism, the present invention sets the MCU as the parallel processing mechanism. Compared with the serial processing mechanism, the time required to process the same amount of data is each data packet. The longest processing time in , which meets the timeliness requirements of capsule endoscopy data.

Please refer to FIG. 5 , a schematic diagram of the composition of the capsule endoscope system of the present invention. The capsule endoscope system of the present invention is composed of a capsule endoscope 10 , an image receiving memory 20 and an image workstation 30 , wherein the capsule endoscope 10 further includes an image sensor 1001 , a magnetic sensor 1002 , an IMU unit 1003 , an MCU unit 1004 and a first RF transceiver unit 1005 .

The image receiving memory 20 further includes a second RF transceiver unit 2001, an MCU unit 1004, a data storage unit 2003 and a data transmission unit 2004.

Please refer to FIG. 6 , a schematic diagram of the composition of the magnetic control capsule endoscope system of the present invention. The magnetic control capsule endoscope system includes a capsule endoscope 10 , a magnetic control device 40 and an image workstation 30 , wherein the composition of the capsule endoscope 10 is the same as that of the image workstation 30 . The same as in FIG. 5 , the magnetic control device 40 further includes a second RF transceiver unit 2001 , an electrical control cabinet 4001 , a motor unit 4002 , a magnetic head module 4003 and a data transmission unit 2004 .

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. within.

Claims

A communication method for a capsule endoscope, comprising a capsule endoscope and an external signal transceiving device, wherein the capsule endoscope includes an electrically connected camera unit, a power supply unit, a sensor unit, an image processing unit and a radio frequency transmission unit, wherein Yes, including the following steps:

Capsule endoscope starts sensor initialization and image capture;

Determine the type of data that needs to be transmitted by radio frequency, if it is determined that image data needs to be transmitted, start broadband transmission of image data, and if it is determined that parameter information needs to be transmitted, start narrowband transmission;

Further determine whether the data transmission is completed, if the data transmission is completed, further determine whether to receive an external device control command, if it is necessary to receive an external device control command, receive and execute the external device control command, and adjust the operating parameters of the capsule endoscope ;

If not, continue to collect image data and parameter information.
The communication method for a capsule endoscope according to claim 1, wherein the wideband bandwidth is greater than or equal to 1MHz, and the narrowband bandwidth is less than or equal to 200KHz.
The communication method for a capsule endoscope according to claim 1, wherein the image data and the parameter information are transmitted using the same working frequency.
The communication method for a capsule endoscope according to claim 1, wherein the image frame rate of the capsule endoscope is between 2 and 35 frames per second.
The communication method for a capsule endoscope according to claim 1, wherein the parameter information is data whose data packet is less than or equal to 1KB.
A communication method for a capsule endoscope, comprising a capsule endoscope and a signal transceiving device, wherein the capsule endoscope comprises an electrically connected camera unit, a power supply unit, a sensor unit, an image processing unit and a radio frequency transmission unit, characterized in that , which further includes the following steps:

The capsule endoscope starts sensor initialization and image capture, and obtains parameter information;

Determine the type of data that needs to be transmitted by radio frequency;

If it is judged that image data needs to be transmitted, set the broadband center frequency and start the broadband transmission of image data;

If it is determined that the parameter information needs to be transmitted, set the narrowband center frequency and start the narrowband transmission parameter information;

Further judge whether the transmission of image data or parameter information is completed, and if it is necessary to continue to transmit data, return to continue the collection of image data and parameter information;

When it is judged that the transmission of the image data and parameter information is completed, it is further judged whether to receive an external device control command, and if it is necessary to receive an external device control command, receive and execute the external device control command;

Then continue to perform the acquisition of image data and parameter information.
The communication method for a capsule endoscope according to claim 6, wherein the image frame rate of the capsule endoscope is between 2 and 35 frames per second.
The communication method for a capsule endoscope according to claim 6, wherein the wideband bandwidth is greater than or equal to 1MHz, and the narrowband bandwidth is less than or equal to 200KHz.
The communication method for a capsule endoscope according to claim 6, wherein the image data and parameter information are transmitted using different operating frequencies.
The communication method for a capsule endoscope according to claim 6, wherein the parameter information is data whose data packet is less than or equal to 1KB.