Sensor system

Abstract

To detect a joint angle and an activity of a muscle in the vicinity of a joint easily.SOLUTION: A sensor system (200) includes: a first detection unit (101a) for detecting a posture of a first site of a subject; a second detection unit (104) for detecting an activity of a muscle of the first site; and a first mounting unit (1a) having a first fixing part (19a) for fixing the first detection part (101a) and the second detection unit (104) to the first site.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a sensor system for detecting the working state of joints and muscles. [Background technology]

[0002] Patent Document 1 discloses a system for monitoring physical therapy and rehabilitation of a joint by arranging an acceleration sensor, a gyroscope, a magnetometer, or a proximity sensor near the site of physical therapy or rehabilitation. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2020-507382 Summary of the Invention [Problem to be solved by the invention]

[0004] For example, for patients suffering from mild knee osteoarthritis, exercise therapy is proposed to maintain and expand the range of motion of the joint and strengthen the muscles surrounding the joint in order to prevent the progression of symptoms and relieve pain. If exercise therapy is not performed appropriately, it may worsen the symptoms. Therefore, it is desirable to perform exercise therapy while checking the joint angle and the activity of the muscles near the joint. Furthermore, since exercise therapy is less effective unless it is performed continuously, it is desirable to be able to easily check the joint angle and the activity of the muscles near the joint.

[0005] One aspect of the present disclosure aims to realize a sensor system that can easily detect joint angles and muscle activity near joints. [Means for solving the problem]

[0006] In order to solve the above problem, a sensor system according to one embodiment of the present disclosure includes a first detection unit that detects the posture of a first part of a subject, a second detection unit that detects muscle activity in the first part, and a first attachment unit having a first fixing part that fixes the first detection unit and the second detection unit to the first part. [Effects of the Invention]

[0007] According to one aspect of the present disclosure, joint angles and muscle activity near joints can be easily detected. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram illustrating an overview of a sensor system according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a diagram showing an example of the appearance of a first mounting portion. [Figure 3] FIG. 2 is a diagram showing an example of the appearance of a first mounting portion. [Figure 4] 1 is a block diagram illustrating an example of a configuration of a sensor system according to an embodiment of the present disclosure. [Figure 5] FIG. 2 is a diagram illustrating an example of a display screen displayed on a display unit of the information processing apparatus. [Figure 6] FIG. 10 is a diagram illustrating another example of a display screen displayed on the display unit of the information processing device. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Embodiment] An embodiment of the present disclosure will be described in detail below.

[0010] (Overview of sensor system 200) First, an overview of a sensor system 200 according to an embodiment of the present disclosure will be described using Fig. 1 with reference to Fig. 4. Fig. 1 is a diagram illustrating an overview of the sensor system 200 according to an embodiment of the present disclosure. Fig. 4 is a block diagram illustrating an example of the configuration of the sensor system 200 according to an embodiment of the present disclosure.

[0011] In the following description of the sensor system 200, the first mounting unit 1a may be mounted on a first part extending from a joint in a first direction, and the second mounting unit 1b may be mounted on a second part extending from the joint in a direction different from the first direction and connected to the first part via the joint. The following description will be given taking as an example a case where the first mounting unit 1a is mounted on the thigh (first part) and the second mounting unit 1b is mounted on the lower leg (second part). However, the sensor system 200 is not limited to this configuration. For example, the sensor system 200 may be configured such that only the first mounting unit 1a is mounted. For example, when the wearer of the first mounting unit 1a is standing, the first mounting unit 1a can detect that the posture of the thigh is approximately parallel to the direction of gravity. Furthermore, when the wearer raises the thigh, the first mounting unit 1a can detect that the posture of the thigh has changed to a posture close to being approximately perpendicular to the direction of gravity.

[0012] The sensor system 200 can be applied to any joint for which joint movement and muscle activity near the joint are to be detected. The first and second attachment units 1a and 1b may be attached at positions sandwiching the joint. The joint is not limited to the knee joint, but may be a hip joint, ankle joint, shoulder joint, elbow joint, wrist joint, or finger joint. When the joint is the knee joint, the first and second attachment units 1a and 1b may be attached to the thigh and lower leg, respectively, as shown in FIG. 1. That is, the first attachment unit 1a is attached to the thigh extending in a direction (first direction) from the knee joint toward the torso, and the second attachment unit 1b is attached to the lower leg extending in a direction (second direction) from the knee joint toward the foot. In the sensor system 200, the first attachment unit 1a may be attached to the lower leg, and the second attachment unit 1b may be attached to the thigh.

[0013] For example, if the joint is a hip joint, the first mounting part 1a may be attached to the thigh. That is, the first mounting part 1a may be attached to the thigh extending in a direction (first direction) from the hip joint toward the knee. For example, if the joint is a shoulder joint, the first mounting part 1a may be attached to the upper arm. That is, the first mounting part 1a may be attached to the upper arm extending in a direction (first direction) from the shoulder joint toward the elbow.

[0014] <First mounting portion 1a> As shown in FIG. 1, the sensor system 200 includes a first attachment unit 1a that is attached to the thigh and detects the posture of the thigh, changes in posture, and muscle activity. The first attachment unit 1a may also have a strap-shaped first fixing unit 19a that is wrapped around the thigh. Even if there are individual differences in thigh thickness, the strap-shaped first attachment unit 1a can easily be fixed to the thigh. The first fixing unit 19a will be described later together with the external appearance of the first attachment unit 1a.

[0015] 4, the first attachment unit 1a is provided with a first detector 101a that detects the posture of the thigh (and changes therein) and a second detector 104 that detects muscle activity in the thigh. In one example, the first detector 101a may be provided in a first communication device 100a that is fixed to a predetermined position on a first fixing unit 19a.

[0016] The first communication device 100a is equipped with a first detection unit 101a, a control unit 102a (first control unit), a first communication unit 103a, and a first fixed unit 19a. The first communication device 100a may also include an amplifier that amplifies a detection signal from the second detection unit 104, a bandpass filter that acts on the amplified detection signal, and an A / D conversion unit that converts the detection signal after the bandpass filter has been applied into a digital signal. The first communication device 100a may be detachable from the first fixed unit 19a. That is, the first detection unit 101a may be detachably disposed on the first attachment unit 1a.

[0017] The control unit 102a may be one or more microcomputers. The control unit 102a can acquire detection data from each of the first detection unit 101a and the second detection unit 104. The control unit 102a analyzes at least one of the detection data (first detection data) output from the first detection unit 101a and the detection data (second detection data) output from the second detection unit 104. The control unit 102a transmits the detection data to the information processing device 2 (described later) via the first communication unit 103a.

[0018] The first attachment unit 1a and the second attachment unit 1b may be able to communicate with each other via a first communication unit 103a and a second communication unit 103b (described later). In this case, the control unit 102a may acquire detection data detected by the third detection unit 101b from the second communication device 100b via the first communication unit 103a. In this case, the control unit 102a may transmit the detection data acquired from each of the first detection unit 101a, the second detection unit 104, and the third detection unit 101b to the information processing device 2 via the first communication unit 103a.

[0019] The first detection unit 101a may be, for example, an acceleration sensor (also called an inertial sensor). The first detection unit 101a is capable of detecting the posture and changes in posture of the thigh resulting from bending and stretching of the knee joint.

[0020] The second detection unit 104 may be an electromyographic sensor having conductive sheet electrodes 17a, 18a that contact a certain area of ​​the skin of the thigh, and detecting myoelectric potentials that indicate muscle activity in the thigh using the sheet electrodes 17a, 18a. In one example, the sheet electrodes 17a, 18a may be strip-shaped. The sheet electrodes 17a, 18a may be flexible, allowing the sheet electrodes 17a, 18a to fit the shape of the thigh and comfortably contact the skin of the thigh.

[0021] There may be multiple sheet electrodes 17a, 18a, and each of the multiple sheet electrodes 17a, 18a may be in contact with the skin of the thigh corresponding to the flexion side (medial, dorsal, first side) and extension side (lateral, ventral, second side) of the knee joint. This allows the second detection unit 104 to simultaneously detect myoelectric potentials indicating the activity of the quadriceps muscle located on the extension side of the thigh and the activity of the hamstrings located on the flexion side. Both the quadriceps muscle and the hamstrings are located around the knee joint and are important muscles for maintaining and improving the functionality of the knee joint. For example, when performing leg training and exercise therapy, the activity of these muscles can be used to confirm whether the training and exercise therapy are being performed correctly.

[0022] <Second mounting portion 1b> 1, the sensor system 200 may further include a second attachment unit 1b that is attached to a lower leg (second part) extending from the knee joint in a direction different from the thigh and that detects the posture of the lower leg. The second attachment unit 1b may also have a belt-shaped second fixing unit 19b. Even if there are individual differences in the thickness of the lower leg, by making the second attachment unit 1b belt-shaped, the second attachment unit 1b can be easily fixed to the lower leg.

[0023] As shown in FIG. 4, the second attachment unit 1b is provided with a third detection unit 101b that detects the posture (and changes) of the lower leg. The third detection unit 101b may be, for example, an acceleration sensor. The third detection unit 101b is capable of detecting the posture and changes in posture of the lower leg resulting from bending and stretching of the knee joint. In one example, the third detection unit 101b may be provided in the second communication device 100b that is fixed to a predetermined position on the second fixing unit 19b.

[0024] The second communication device 100b includes a third detection unit 101b, a control unit 102b, and a second communication unit 103b. The second communication device 100b may transmit detection data detected by the third detection unit 101b to the information processing device 2, which will be described later. Alternatively, the detection data detected by the third detection unit 101b may be transmitted from the second communication device 100b to the first communication device 100a, and then transmitted from the first communication device 100a to the information processing device 2. The second communication device 100b may be detachable from the second fixed unit 19b. That is, the third detection unit 101b may be detachably disposed on the second attachment unit 1b.

[0025] The control unit 102b may be one or more microcomputers. The control unit 102b acquires detection data from the third detection unit 101b. The control unit 102b may transmit the detection data to the information processing device 2 (described later) via the second communication unit 103b.

[0026] The third detection unit 101b may be, for example, an acceleration sensor. The third detection unit 101b is capable of detecting the posture and changes in posture of the lower leg resulting from bending and stretching of the knee joint.

[0027] 1, when the first attachment unit 1a and the second attachment unit 1b are used in the sensor system 200, the first attachment unit 1a detects the posture of the thigh and the activity of the muscles, and the second attachment unit 1b detects the posture of the lower leg. The joint angle of the knee joint can be calculated based on the posture of the thigh and the posture of the lower leg. Therefore, when the first attachment unit 1a is attached to the thigh and the second attachment unit 1b is attached to the lower leg, the sensor system 200 can simultaneously detect the joint angle of the knee joint and the activity of the muscles of the thigh.

[0028] The second attachment unit 1b may have a configuration similar to that of the first attachment unit 1a shown in FIG. 4. That is, the second attachment unit 1b may further include a fourth detection unit (not shown) that detects muscle activity, in addition to the third detection unit 101b. In this case, the second communication device 100b may include an amplifier that amplifies a detection signal from the fourth detection unit, a band-pass filter that acts on the amplified detection signal, and an A / D converter that converts the detection signal after the band-pass filter has been applied into a digital signal. With this configuration, the sensor system 200 can detect muscle activity in the lower leg in addition to the joint angle of the knee joint and the muscle activity in the thigh.

[0029] <Information processing device 2> 1, the information processing device 2 is a computer communicably connected to at least one of the first communication device 100a and the second communication device 100b, and includes a control unit 20 (second control unit), a storage unit 21, a communication unit 22, and a display unit 23. The control unit 20 is a CPU, and controls the information processing device 2 to execute processing of each function it has.

[0030] The storage unit 21 is a storage device that stores various computer programs read by the control unit 20 and data used in various processes executed by the control unit 20. As shown in Fig. 4, the storage unit 21 may store, for example, an exercise therapy support application 211 for evaluating the appropriateness of thigh posture and muscle activity associated with exercise therapy performed by a wearer wearing the first wearing unit 1a, and detection data 212. The detection data 212 stores detection data acquired by the information processing device 2. The detection data acquired by the information processing device 2 may include detection data related to the thigh posture detected by the first detection unit 101a, detection data related to the thigh muscle activity detected by the second detection unit 104, and detection data related to the lower leg posture detected by the third detection unit 101b (third detection data).

[0031] The control unit 20 analyzes at least one of the detection data output from the first detection unit 101a, the detection data output from the second detection unit 104, and the detection data output from the third detection unit 101b. The control unit 20 includes an application execution unit 201 and a display control unit 202. The application execution unit 201 executes each process of the exercise therapy support application 211.

[0032] The application executing unit 201 executes a process of establishing communication with the first communication unit 103a, a process of acquiring detected data, a process of storing the detected data in the storage unit 21, and a process of analyzing the detected data. The application executing unit 201 may also calculate the joint angle of the knee joint connecting the thigh and the lower leg based on the detected data by the first detection unit 101a and the detected data by the third detection unit 101b. The application executing unit 201 may also execute a process of determining the wearing state of the first wearing unit 1a and the second wearing unit 1b using the detected data by the first detection unit 101a and the detected data by the third detection unit 101b when the wearer is in a predetermined posture (sitting, standing, lying down, etc.). Specifically, the application executing unit 201 may determine whether the devices are worn in the correct positions and whether they are properly fixed (i.e., whether they are tight or not tight around the worn body part) by measuring the impedance between the electrodes.

[0033] The application execution unit 201 may output analysis information including detection results regarding exercise performed by the subject to the display control unit 202 based on the detection data by the first detection unit 101a, the detection data by the second detection unit 104, and the detection data by the third detection unit 101b. The exercise performed by the subject may be exercise therapy instructed by a medical professional. The analysis information may include at least one of the number of times the subject performs the exercise and detection results regarding posture and muscle activity during the exercise.

[0034] The control unit 20 may generate a web page for each subject showing the analysis results output from the application execution unit 201. In this case, information for accessing the generated web page may be provided to the subject and the medical personnel who instructed the subject to undergo exercise therapy. This makes the analysis information available to the subject and the medical personnel.

[0035] Communication between the communication unit 22 and the first communication unit 103a may be either wired communication or wireless communication. Communication between the communication unit 22 and the second communication unit 103b may also be either wired communication or wireless communication. Communication between the first communication unit 103a and the second communication unit 103b may also be either wired communication or wireless communication. For example, the communication unit 22, the first communication unit 103a, and the second communication unit 103b may transmit and receive various detection data and control signals while short-range wireless communication using Bluetooth (registered trademark) is established. Alternatively, the communication unit 22 and the first communication unit 103a and / or the second communication unit 103b may transmit and receive various detection data and control signals via a communication network such as the Internet.

[0036] The display control unit 202 executes a process of displaying the analysis information generated by the application execution unit 201 on the display unit 23. The analysis information is displayed on the display unit 23, so that it can be viewed by the subject and medical personnel. The display screen displayed on the display unit 23 will be described later.

[0037] <Appearance of first mounting part 1a> Next, the appearance of first attachment unit 1a will be described with reference to Fig. 2 and Fig. 3. Fig. 2 and Fig. 3 are diagrams showing an example of the appearance of first attachment unit 1a. Fig. 2 shows an example of the appearance of the side (front side) of first attachment unit 1a that does not come into contact with the skin of the thigh, and Fig. 3 shows an example of the appearance of the side (back side) of first attachment unit 1a that comes into contact with the skin of the thigh. As shown in Figs. 2 and 3, first attachment unit 1a has a band shape, and the entire band shape functions as first fixing unit 19a for fixing first detection unit 101a and second detection unit 104 to the thigh.

[0038] The first attachment part 1a wrapped around the thigh can be secured to the thigh using the square ring 11a, the belt part 15a, and the hook-and-loop fastener 16a. For example, the belt part 15a is passed through the square ring 11a, pulled to a position where it fits appropriately, and then secured with the hook-and-loop fastener 16a. This allows the first attachment part 1a to be easily attached to the thigh. The belt part 15a may be stretchable. This allows the first attachment part 1a to be easily attached to the thigh, regardless of individual differences in thigh thickness.

[0039] The first attachment portion 1a may have a magnetic hook 14a that can be fitted with a magnetic hook provided on the first communication device 100a and that is used to fix the first communication device 100a.

[0040] 3, sheet electrodes 17a and 18a are arranged on the side of first attachment part 1a that comes into contact with the skin of the thigh. For example, sheet electrode 17a abuts against the skin of the thigh corresponding to the flexed side (inner side, dorsal side) of the knee joint, and sheet electrode 18a abuts against the skin of the thigh corresponding to the extended side (outer side, ventral side) of the knee joint.

[0041] If the second mounting unit 1b does not include the fourth detection unit, the second mounting unit 1b does not include the sheet electrodes 17a and 18a. Therefore, the appearance of the second mounting unit 1b is the same as that of the first mounting unit 1a shown in FIGS. 2 and 3, but without the sheet electrodes 17a and 18a. If the second mounting unit 1b includes the fourth detection unit, the appearance of the second mounting unit 1b may be the same as that of the first mounting unit 1a shown in FIGS. 2 and 3. Therefore, the second mounting unit 1b can be easily attached to the lower leg. Furthermore, the belt portion of the second mounting unit 1b may be stretchable, similar to the belt portion 15a. This allows the second mounting unit 1b to be easily attached to the lower leg, regardless of individual differences in the thickness of the lower leg.

[0042] (Display screen example) An example of the display screen will be described below with reference to Fig. 5 and Fig. 6. Fig. 5 and Fig. 6 are diagrams showing an example of the display screen displayed on the display unit 23 of the information processing device 2.

[0043] Area R1 displays buttons for accepting various operations from a user of sensor system 200 (for example, a person wearing first attachment unit 1a and second attachment unit 1b). In Figs. 5 and 6, "Start measurement / recording" is a button for accepting an operation to start detecting the posture of the thighs and lower legs, to start detecting the activity of thigh muscles, and to obtain detected data. "Stop" is a button for accepting an operation to interrupt or end detection.

[0044] Area R2 displays the measurement results of the number of times a predetermined exercise was performed and the time a predetermined posture was maintained.

[0045] Area R3 displays whether the initial posture is correct or not, and indicates the action to be taken. The message "OK. Press your knees together" in Figures 5 and 6 indicates that the initial posture is correct, and prompts the user to press their knees together.

[0046] Area R4 displays a diagram showing the posture of the thigh and lower leg and the joint angle of the knee joint based on the detection data detected by the first detection unit 101a and the detection data detected by the third detection unit 101b.

[0047] In area R5, a numerical value (deg) indicating the joint angle and the activity level of the thigh muscle detected by the second detection unit 104 (for example, an electromyographic score) are displayed.

[0048] Area R6 displays the maximum detected myoelectric potential of the quadriceps and the maximum detected myoelectric potential of the hamstrings. In Figures 5 and 6, the maximum myoelectric potential of the quadriceps is 15.35 (μV), and the maximum myoelectric potential of the hamstrings is 113.38 (μV).

[0049] Area R7 displays time-series data D1 ( FIG. 5 ) and D3 ( FIG. 6 ) of the detection results of the myoelectric potential of the quadriceps muscles detected by the second detection unit 104. Area R8 displays time-series data D2 ( FIG. 5 ) and D4 ( FIG. 6 ) of the detection results of the myoelectric potential of the hamstrings detected by the second detection unit 104. Because the time axes of the time-series data D1 and D3 ( FIG. 5 ) of the myoelectric potential of each muscle shown in areas R7 and R8 and the time axes of the time-series data D2 and D4 ( FIG. 6 ) are the same, it is possible to easily check how the quadriceps muscles and hamstrings were active during a given exercise using areas R7 and R8.

[0050] The invention according to the present disclosure has been described above based on the drawings and examples. However, the invention according to the present disclosure is not limited to the above-described embodiments. In other words, the invention according to the present disclosure can be modified in various ways within the scope of the present disclosure, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the invention according to the present disclosure. In other words, it should be noted that a person skilled in the art can easily make various modifications or corrections based on the present disclosure. It should also be noted that these modifications or corrections are included in the scope of the present disclosure.

[0051] 〔summary〕 A sensor system according to aspect 1 of the present disclosure includes a first detection unit that detects the posture of a first part of a subject, a second detection unit that detects muscle activity in the first part, and a first attachment unit having a first fixing part that fixes the first detection unit and the second detection unit to the first part.

[0052] A sensor system according to aspect 2 of the present disclosure may be an electromyographic sensor in the above aspect 1, wherein the second detection unit has a surface electrode that contacts the skin of the first area and detects myoelectric potentials that indicate muscle activity in the first area using the surface electrode.

[0053] A sensor system according to a third aspect of the present disclosure is the sensor system of the second aspect, wherein the planar electrode is flexible.

[0054] A sensor system according to aspect 4 of the present disclosure may be such that, in aspect 2 or 3 above, the surface electrodes are multiple, and each of the multiple surface electrodes abuts a first side of the first portion and a second side different from the first side.

[0055] A sensor system according to a fifth aspect of the present disclosure is the sensor system of the fourth aspect, wherein the first attachment part is belt-shaped.

[0056] A sixth aspect of the present disclosure relates to a sensor system in any one of the first to fifth aspects, wherein the first detection unit is detachably attached to the first attachment unit.

[0057] A sensor system according to a seventh aspect of the present disclosure is the sensor system of any one of the first to sixth aspects, wherein the first portion may be a portion extending in a first direction from a joint.

[0058] A sensor system according to aspect 8 of the present disclosure, in any of aspects 1 to 7 above, further includes a first control unit capable of communicating with the first attachment unit, and the first control unit may analyze at least one of the first detection data output from the first detection unit and the second detection data output from the second detection unit.

[0059] The sensor system according to aspect 9 of the present disclosure, in any of aspects 1 to 8 above, may further include a third detection unit that detects the posture of a second part of the subject, and a second attachment unit having a second fixing part that fixes the third detection unit to the second part.

[0060] A sensor system according to a tenth aspect of the present disclosure is the sensor system of the ninth aspect, wherein the third detection unit is detachably attached to the second attachment unit.

[0061] A sensor system according to an eleventh aspect of the present disclosure is the sensor system of the ninth or tenth aspect, wherein the second portion may be connected to the first portion by a joint.

[0062] A sensor system according to a twelfth aspect of the present disclosure is any one of the ninth to eleventh aspects, wherein the first mounting unit and the second mounting unit may include a communication unit capable of communicating with each other.

[0063] The sensor system of aspect 13 of the present disclosure, in any of aspects 9 to 12 above, further includes a second control unit capable of communicating with at least one of the first mounting unit and the second mounting unit, and the second control unit may analyze at least one of the first detection data output from the first detection unit, the second detection data output from the second detection unit, and the third detection data output from the third detection unit.

[0064] In a sensor system according to aspect 14 of the present disclosure, in aspect 13 above, the second control unit may calculate the joint angle of the joint connecting the first part and the second part based on first detection data from the first detection unit and third detection data from the third detection unit.

[0065] In the sensor system of aspect 15 of the present disclosure, in aspect 13 or 14 above, the second control unit may determine whether the first attachment portion and the second attachment portion are attached correctly or not based on the first detection data and the third detection data when the first portion and the second portion are in a predetermined posture.

[0066] In a sensor system according to aspect 16 of the present disclosure, in any of aspects 13 to 15 above, the second control unit may output analytical information including at least one of the number of movements performed by the subject and detection results of detecting the posture and muscle activity during the movements based on the first detection data, the second detection data, and the third detection data.

[0067] In the sensor system of aspect 17 of the present disclosure, in aspect 16 above, the exercise is an exercise instructed by a medical professional to the subject, and the second control unit may provide the analysis information in a state that can be viewed by the subject and the medical professional.

[0068] A sensor system according to an eighteenth aspect of the present disclosure is configured such that, in any one of the first to seventeenth aspects, the first site is a thigh.

[0069] An information processing device according to one embodiment of the present disclosure may be realized by a computer. In this case, the control program of the information processing device that causes the computer to operate as each part (software element) of the information processing device to realize the information processing device on the computer, and the computer-readable recording medium on which the control program is recorded, also fall within the scope of the present disclosure. [Explanation of symbols]

[0070] 1a First mounting part 1b Second mounting part 2. Information processing equipment 17a, 18a Planar electrode 19a 1st fixed part 19b 2nd fixed part 23 Display section 200 Sensor System 101a First detection unit 101b Third detection unit 103a 1st Communication Department 103b 2nd Communication Department 104 Second detection unit

Claims

1. a first detection unit that detects the posture of a first part of the subject; a second detection unit that detects muscle activity in the first region; a first mounting portion having a first fixing portion that fixes the first detection portion and the second detection portion to the first portion; A sensor system comprising:

2. the second detection unit is an electromyographic sensor having a surface electrode in contact with the skin of the first region and detecting a myoelectric potential indicating muscle activity of the first region using the surface electrode; The sensor system of claim 1 .

3. The planar electrode is flexible. The sensor system of claim 2 .

4. a plurality of the planar electrodes, each of the planar electrodes being in contact with a first side of the first portion and a second side different from the first side; The sensor system according to claim 2 or 3.

5. The first mounting portion is in a band shape. The sensor system of claim 1 .

6. The first detection unit is detachably disposed on the first attachment unit. The sensor system of claim 1 .

7. The first portion is a portion extending from the joint in a first direction. The sensor system of claim 1 .

8. Further, a first control unit capable of communicating with the first attachment unit is provided, the first control unit analyzes at least one of the first detection data output from the first detection unit and the second detection data output from the second detection unit; The sensor system of claim 1 .

9. a third detection unit that detects a posture of a second part of the subject; a second mounting portion having a second fixing portion that fixes the third detection portion to the second portion; Further provided with The sensor system of claim 1 .

10. The third detection unit is detachably disposed in the second attachment unit. The sensor system of claim 9.

11. The second portion is connected to the first portion by a joint. The sensor system of claim 9.

12. the first mounting unit and the second mounting unit each include a communication unit capable of communicating with each other; The sensor system of claim 9.

13. a second control unit capable of communicating with at least one of the first mounting unit and the second mounting unit; the second control unit analyzes at least one of the first detection data output from the first detection unit, the second detection data output from the second detection unit, and the third detection data output from the third detection unit; The sensor system of claim 9.

14. The second control unit is calculating a joint angle of a joint connecting the first part and the second part based on first detection data by the first detection unit and third detection data by the third detection unit; The sensor system of claim 13.

15. The second control unit is determining whether the first attachment portion and the second attachment portion are properly attached based on the first detection data and the third detection data when the first portion and the second portion are in a predetermined posture; The sensor system of claim 13.

16. The second control unit is outputting analysis information including at least one of the number of times the subject exercises and detection results of detecting the posture and muscle activity during the exercises based on the first detection data, the second detection data, and the third detection data; The sensor system of claim 13.

17. the exercise is an exercise instructed by a medical professional to the subject; the second control unit provides the analysis information in a state that can be viewed by the subject and the medical personnel. The sensor system of claim 16.

18. The first region is a thigh. The sensor system of claim 1 .

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