Body shape detection circuit for movement-free shoulder line of massage chair

Abstract

The utility model discloses a body shape detection circuit of a massage chair movement-free shoulder line, which comprises a VCC end, a first field-effect tube, a motor, a second field-effect tube, a current sampling resistor, a first grounding end, a second grounding end, a filter capacitor, a digital-to-analog converter, a filter resistor, a third field-effect tube and a fourth field-effect tube, the VCC end is electrically connected with the D electrode of the first field effect transistor and the D electrode of the fourth field effect transistor, the S electrode of the first field effect transistor and the S electrode of the fourth field effect transistor are electrically connected with the positive electrode and the negative electrode of the motor respectively, and the S electrode of the first field effect transistor is electrically connected with the D electrode of the second field effect transistor. According to the utility model, when the circuit moves to the shoulder on the track on the motor, the load in the circuit is increased, the current rises, the current is filtered by the filter capacitor and the filter resistor, the position is identified as a shoulder line, and compared with the traditional optocoupler detection, the detection accuracy is greatly improved by using the current change for detection.

Description

Technical Field

[0001] The utility model relates to the technical field of detection circuits, in particular to a body shape detection circuit for a massage chair without a core shoulder line. Background Art

[0002] A massage chair utilizes mechanical rolling force and mechanical squeezing force to perform massage. Massage can promote blood circulation, improve back pain and prevent diseases, improve sleep quality, and relieve general fatigue. During use, a massage chair needs to detect the user's shoulder line position. In the existing technology, optical coupling is used to detect body shape. When optical coupling is used for detection, only a switch signal is generated, which greatly reduces the accuracy of detection. Utility Model Content

[0003] The utility model aims to provide a body shape detection circuit for a massage chair without a core shoulder line, so as to solve the problem of low detection accuracy in the existing body shape detection circuit for a massage chair without a core shoulder line.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a body shape detection circuit of a massage chair with an inorganic core shoulder line, comprising a VCC terminal, a first field effect tube, a motor, a second field effect tube, a current sampling resistor, a first ground terminal, a second ground terminal, a filter capacitor, a digital-to-analog converter, a filter resistor, a third field effect tube and a fourth field effect tube, wherein the VCC terminal is electrically connected to the D pole of the first field effect tube and the D pole of the fourth field effect tube, respectively, and the S pole of the first field effect tube and the S pole of the fourth field effect tube are electrically connected to the positive and negative poles of the motor, respectively.

[0005] Furthermore, the S pole of the first field effect tube is electrically connected to the D pole of the second field effect tube, and the S pole of the fourth field effect tube is electrically connected to the D pole of the third field effect tube.

[0006] Furthermore, the S pole of the second field effect transistor and the S pole of the third field effect transistor are both electrically connected to the input end of the current sampling resistor.

[0007] Furthermore, the output end of the current sampling resistor is electrically connected to the first ground end.

[0008] Furthermore, the S pole of the second field effect tube and the S pole of the third field effect tube are electrically connected to the input end of the filter resistor, and the output end of the filter resistor is electrically connected to one side of the digital-to-analog converter.

[0009] Furthermore, the output end of the filter resistor is electrically connected to the output end of the filter capacitor.

[0010] Furthermore, the output terminal of the filter capacitor is electrically connected to the second ground terminal.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: when the motor moves to the shoulder on the track, the load in the circuit increases, the current rises, and then it is filtered by the filter capacitor and the filter resistor, and this place is identified as the shoulder line. Compared with the traditional optocoupler detection, the detection is carried out by using the current change, which greatly improves the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the circuit principle diagram of the utility model;

[0013] Figure 2 It is a schematic diagram of the current change in the circuit when the motor of the utility model moves along the track;

[0014] In the figure: 1, VCC terminal; 2, first field effect transistor; 3, motor; 4, second field effect transistor; 5, current sampling resistor; 6, first ground terminal; 7, second ground terminal; 8, filter capacitor; 9, digital-to-analog converter; 10, filter resistor; 11, third field effect transistor; 12, fourth field effect transistor. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1-2The utility model provides an embodiment: a body shape detection circuit of a massage chair without a core shoulder line, including a VCC terminal 1, a first field effect tube 2, a motor 3, a second field effect tube 4, a current sampling resistor 5, a first ground terminal 6, a second ground terminal 7, a filter capacitor 8, a digital-to-analog converter 9, a filter resistor 10, a third field effect tube 11 and a fourth field effect tube 12, the VCC terminal 1 is electrically connected to the D pole of the first field effect tube 2 and the D pole of the fourth field effect tube 12 respectively, and the S pole of the first field effect tube 2 and the S pole of the fourth field effect tube 12 are electrically connected to the positive and negative poles of the motor 3 respectively, and the S pole of the first field effect tube 2 is electrically connected to the first field effect tube 2. The D poles of the second field effect tube 4 are electrically connected, and the S pole of the fourth field effect tube 12 is electrically connected to the D pole of the third field effect tube 11, the S pole of the second field effect tube 4 and the S pole of the third field effect tube 11 are both electrically connected to the input end of the current sampling resistor 5, and the output end of the current sampling resistor 5 is electrically connected to the first ground terminal 6, the S pole of the second field effect tube 4 and the S pole of the third field effect tube 11 are electrically connected to the input end of the filter resistor 10, and the output end of the filter resistor 10 is electrically connected to one side of the digital-to-analog converter 9, the output end of the filter resistor 10 is electrically connected to the output end of the filter capacitor 8, and the output end of the filter capacitor 8 is electrically connected to the second ground terminal 7.

[0017] Working principle: During the use of the utility model, the motor 3 runs along the track inside the massage chair. As the motor 3 continues to move upward, the current detected in the circuit continues to increase. When the motor 3 moves to the user's shoulder, the load increases and the current rises. At this time, the filtering capacitor 8, the filtering resistor 10 and the filtering software are filtered, and it is concluded that this is the shoulder line, the VCC terminal 1 is used for voltage supply, the first grounding terminal 6 is used for grounding the current sampling resistor 5, the current sampling resistor 5 is used for current sampling, the second grounding terminal 7 is used for grounding the filter capacitor 8, and the digital-to-analog converter 9 is used for digital-to-analog conversion.

[0018] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A body shape detection circuit for a massage chair with an inorganic core shoulder line, comprising a VCC terminal (1), a first field effect transistor (2), a motor (3), a second field effect transistor (4), a current sampling resistor (5), a first ground terminal (6), a second ground terminal (7), a filter capacitor (8), a digital-to-analog converter (9), a filter resistor (10), a third field effect transistor (11) and a fourth field effect transistor (12), characterized in that: The VCC terminal (1) is electrically connected to the D pole of the first field effect tube (2) and the D pole of the fourth field effect tube (12), respectively, and the S pole of the first field effect tube (2) and the S pole of the fourth field effect tube (12) are electrically connected to the positive and negative poles of the motor (3), respectively.

2. The body shape detection circuit of the massage chair without core shoulder line according to claim 1, characterized in that: The S pole of the first field effect tube (2) is electrically connected to the D pole of the second field effect tube (4), and the S pole of the fourth field effect tube (12) is electrically connected to the D pole of the third field effect tube (11).

3. The body shape detection circuit of the massage chair without core shoulder line according to claim 2, characterized in that: The S pole of the second field effect tube (4) and the S pole of the third field effect tube (11) are both electrically connected to the input end of the current sampling resistor (5).

4. The body shape detection circuit of the massage chair without core shoulder line according to claim 3, characterized in that: The output end of the current sampling resistor (5) is electrically connected to the first grounding end (6).

5. The body shape detection circuit of the massage chair without core shoulder line according to claim 3, characterized in that: The S pole of the second field effect tube (4) and the S pole of the third field effect tube (11) are electrically connected to the input end of the filter resistor (10), and the output end of the filter resistor (10) is electrically connected to one side of the digital-to-analog converter (9).

6. The body shape detection circuit of the massage chair without core shoulder line according to claim 5, characterized in that: The output end of the filter resistor (10) is electrically connected to the output end of the filter capacitor (8).

7. The body shape detection circuit of the massage chair without core shoulder line according to claim 6, characterized in that: The output end of the filter capacitor (8) is electrically connected to the second ground end (7).

Images