CN203815455U - Body surface conductivity tester - Google Patents

Abstract

The utility model discloses a body surface conductivity tester which comprises a conductivity sensor, a charge detector, an ADC (analog-to-digital converter) and a data processor which are arranged in a shell of the tester and are sequentially connected; the charge tester, the ADC and the data processor are respectively connected with an embedded signal processor, and the embedded signal processor is further connected with a display. According to the body surface conductivity tester provided by the utility model, the arrayed type conductivity sensor is adopted, so that a capacitor Cs is formed between a testing electrode and the skin of a human body, the charge-discharge charge of the Cs is detected by the charge detector, and the capacitor value Cs is calculated by the ADC, so that the intensity of the electric field in the human body is calculated, and a body surface conductivity distribution graph is obtained. According to the utility model, detecting is performed only by the body surface electrode, and the electrode is insulated from the skin, and has no influence on a testee, the detecting accuracy is high, the detecting speed is high, and the stability is good, and estimation can be performed on people's emotion change, concentration change and the like.

Description

A body surface conductivity tester

technical field

The utility model belongs to the technical field of psychological biofeedback and relates to a body surface conductance tester.

Background technique

According to quantum mechanics, the organs, tissues, cells, molecules, and atoms of the human body all radiate electromagnetic waves, and the superposition of these electromagnetic standing waves forms a non-uniform electric field in the body. The physiological and psychological state of the human body has a great influence on the electric field distribution in the human body. By detecting the conductance distribution of the body surface, the change of the electric field distribution in the body can be detected. Using biofeedback technology, psychological training and therapy can be carried out.

At present, the method of electrodermal detection is generally used to detect some physiological indicators, and the electrodermal detection represents the resistance value between two selected points on the skin. The principle of electrodermal biofeedback is: when the mood is tense, fear or anxiety, the secretion of sweat glands increases, and the sweat on the skin surface increases, which leads to the increase of conduction and the increase of skin electricity; when the mood is calm, the secretion of sweat glands decreases, and the conductivity of the skin decreases, causing skin electricity. reduce. Therefore, the level of skin electricity can reflect the change of mood, and it is a physiological index reflecting the change of mood.

When an individual is in an emotional state, the relaxation and contraction of blood vessels in the skin and changes in sweat gland secretion cause changes in skin resistance, which represent the emotional response of the autonomic nervous system.

The traditional electrodermal detection method usually measures the skin resistance indirectly, and applying voltage will affect the bioelectricity of the skin.

Contents of the invention

The utility model aims at solving the above-mentioned problems in the prior art, and provides a body surface conductance tester which detects only through the body surface electrodes.

The utility model is realized according to the following technical solutions:

The body surface conductance tester of the present utility model comprises a conductance sensor, a charge detector, an ADC converter and a data processor which are arranged inside the tester shell and connected in sequence; the charge detector, the ADC converter and the data processor are respectively connected with the The embedded signal processor is connected to the embedded signal processor; a test electrode is set in the center of one side of the tester shell, and the test electrode is connected to the internal conductivity sensor; the tester shell is connected to the side with the test electrode A display screen is arranged on the opposite side, and the display screen is connected with the display inside the casing of the tester.

A layer of insulating film is arranged on the outside of the test electrode.

The left side and the right side of the tester casing are respectively provided with a fixing belt, the left fixing belt is connected to the left side of the tester casing through the fixing belt connecting shaft, and the right fixing belt is connected to the tester casing through the fixing belt connecting shaft. Right.

The right fixing belt is sleeved with a fixing ring, and the end of the right fixing belt is provided with a fixing buckle.

The advantages and positive effects that the utility model has are:

The body surface conductance tester of the present utility model uses a single-electrode conductance sensor and is provided with a test electrode. There is an insulating film between the test electrode and human skin, so that a capacitance Cs is formed between the electrode and the skin, and Cs is detected by a charge detector. The charging and discharging charges are calculated by the ADC converter to calculate the capacitance value Cs, thereby calculating the strength of the electric field in the human body. The body surface conductance distribution map is obtained through the data processor and the signal processor. The invention only detects through the body surface electrodes and the electrodes are insulated from the skin, has no effect on the subjects, has high detection accuracy, fast detection speed, good stability, and can detect changes in people's emotions, attention changes, and emotions. Stability, etc. are evaluated.

The conductance measurement technology of the utility model can replace the electrodermal measurement technology, is more reasonable and scientific than the existing electrodermal measurement method, and can be applied to psychological fields such as testing people's emotional changes, attention changes, and consciousness state changes.

Description of drawings

Fig. 1 is the internal structure block diagram of the body surface conductance tester of the present utility model;

Fig. 2 is a schematic diagram of the appearance structure of the body surface conductance tester of the present invention;

Fig. 3 is a schematic circuit diagram of the charge detector of the present invention.

Explanation of symbols of main components in the figure:

1: Conductivity sensor 2: Charge detector

3: ADC converter 4: Data processor

5: Display 6: Embedded signal processor

7: Left fixed belt 8: Fixed belt connecting shaft

9: Button 10: Insulation film

11: Test electrode 12: Fixing ring

13: Fixed buckle 14: Right fixed belt

                                                                                                 16: Body surface potential

17: Voltage measurement point 18: Integrating capacitance

19: Operational amplifier.

Detailed ways

The body surface conductance tester of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. In the accompanying drawings, the same components as those in the prior art are designated with the same reference numerals. The following examples are only used to illustrate the present invention but not to limit the present invention.

Fig. 1 is a block diagram of the internal structure of the body surface conductance tester of the present invention; Fig. 2 is a schematic diagram of the appearance structure of the body surface conductance tester of the present invention. As shown in Figures 1 and 2, the body surface conductance tester of the present invention includes a conductance sensor 1, a charge detector 2, an ADC converter 3 and a data processor 4 arranged inside the tester shell and connected in sequence. The charge detector 2 , the ADC converter 3 and the data processor 4 are respectively connected to an embedded signal processor 6 , and a display 5 is also connected to the embedded signal processor 6 . A test electrode 11 is provided in the center of one side of the tester casing, and a layer of insulating film 10 is provided. The test electrode 11 is connected to the conductivity sensor 1 arranged inside the tester casing. A display screen is provided on the other side of the tester housing opposite to the side provided with the test electrodes 11, and the display screen is connected to the display 5 inside the tester housing.

The test electrodes 11 and the display screen are respectively arranged on the front and back of the casing of the tester. Buttons 9 are arranged on the upper side and the lower side of the tester shell. The left side and the right side of the tester casing are respectively connected with a fixing belt, the left fixing belt 7 is connected to the left side of the tester casing through the fixing belt connection shaft 8, and the right fixing belt 14 is connected to the tester casing through the fixing belt connecting shaft 8 to the right of the . The right fixing belt 14 is sleeved with a fixing ring 12 , and the end of the right fixing belt 14 is provided with a fixing buckle 13 . During use, the left fixing belt 7 passes through the fixing buckle 13 and is fixed according to the degree of tightness, and the redundant part of the left fixing belt 7 stretching out the fixing buckle 13 is bound and fixed by the fixing ring 12 .

The theoretical basis of the utility model is as follows: any organism is made of molecules, molecules are made of atoms, and atoms are made of nuclei and electrons. Electrons orbiting the nucleus create a magnetic field. When the psychology and physiology of the human body change, the material structural elements that make up the human body change first, and the normal movement of the electrons that make up the atom is first abnormal. Due to the correlation between electron movement and magnetic field, once the resonant magnetic field of normal electrons changes, the information transmission channels from atoms to molecules, from molecules to cells, and from cells to organs will change, resulting in changes in the distribution of electric fields in the body.

In fact, when the subject's mood fluctuates, the skin resistance value does not decrease monotonously, but fluctuates sharply. When emotions fluctuate, the dissipative structure of the electromagnetic field will fluctuate greatly, which will lead to large fluctuations in the body's electrical conductivity.

Conductance (J) is the reciprocal of resistance (R), that is, R=1/J or J=I/V). From a physical point of view, the conductance (J) is directly proportional to the electric field strength. J=σE, σ is a constant related to matter. What is measured on the skin is not skin resistance but body conductance, according to the formula J=σE: conductance (J) is proportional to electric field strength (E). The conclusion is that what is measured on the skin is the electric field strength (E) in the body.

"Dissipative structure" is a dynamic structure that depends on continuous energy supply to exist, and the energy distribution in the human body is a dissipative structure formed by electromagnetic waves. Human organs, tissues, cells, molecules, etc. all emit electromagnetic waves, so they are all sources of electromagnetic waves, also known as "oscillators". The heart and lungs of the human body are two typical sources of electromagnetic waves, and they are also two oscillators. A common electrocardiogram measures the electromagnetic waves emitted by the heart. The less commonly used electropulmonogram also measures electromagnetic waves. They must have their own natural frequencies, but they cannot be completely independent. When exercising, each other must accelerate accordingly; when resting, they must slow down accordingly.

The theory of physics states that the conductance of the human body is directly proportional to the strength of the internal electric field. To a large extent, measurements of human conductance can be performed on the body surface to determine the distribution of electric fields in the human body. This non-uniform distribution of the internal electric field is mainly produced by the overlapping of electromagnetic standing waves. We do not need to measure and calculate the frequency spectrum of electromagnetic waves, but can sample and measure the interference pattern of this electromagnetic wave on the body surface, so as to obtain the changes in the physiological and psychological state of the human body.

In order to detect the electric field strength in the body through the body surface without affecting the electric field of the human body itself. An insulating film is placed between the detection electrode and the skin, so that a measuring capacitance C _S is formed between the detection electrode and the skin. By detecting the capacitance, the electric field on the body surface is calculated.

Fig. 3 is a schematic circuit diagram of the charge detector of the present invention. As shown in FIG. 3 , an operational amplifier 19 is arranged inside the charge detector, and the integrating capacitor 18 is connected between the non-inverting input terminal and the output terminal of the operational amplifier 19 , and the reset switch K ₂ is connected in parallel with the integrating capacitor 18 . A measurement capacitance Cs is formed between the detection electrode and the body surface potential 16 on the skin, and the measurement capacitance Cs is connected to the non-inverting input terminal of the operational amplifier through the switch _K1 . During measurement, first, charge the measuring capacitor Cs, close the switch K ₁ , measure the measured voltage V ₁ from the voltage measurement point 17 of the inverting input terminal of the operational amplifier, then disconnect the switch K ₁ , and obtain the measured voltage V 1 from the output terminal 20 of the operational amplifier. Obtain the measured charge Q ₁ ; then, discharge the measuring capacitor Cs, close the switch K ₁ , obtain the bias voltage V ₂ from the voltage measurement point 17, and then open the switch K ₁ , obtain the bias charge from the output terminal 20 of the operational amplifier _Q2 . According to the formula C _S =(Q ₁ -Q ₂ )/(V ₁ -V ₂ ), the capacitance value between the detection electrode and the skin can be obtained, so as to calculate the conductance of the body surface.

After measuring the potential of each point on the body surface through the conductivity sensor, the capacitance value Cs is calculated through the A/D converter, and the intensity of the electric field in the human body is calculated. The body surface conductance distribution map is obtained through the data processor and the embedded signal processor, and displayed on the display screen.

This technology only detects through the body surface electrodes and the electrodes are insulated from the skin, and has no effect on the subjects. It has high detection accuracy, fast detection speed and good stability. It provides a new feedback for psychological biofeedback. technology. Through computer calculation and graphics technology, the distribution map of the surface conductance of the human body can be obtained. It can reflect the changes in human psychology and physiology, and can provide a new feedback quantity for psychological biofeedback.

The body surface conductance tester of the utility model improves the electrodermal measurement technology generally used in the field of psychology. The conductometric measurement technology can replace the electrodermal measurement technology, which is more reasonable and scientific than the existing electrodermal measurement method. It can be applied to psychological fields such as testing people's emotional changes, attention changes, and state of consciousness changes.

Claims (4)

1. A body surface conductance tester, characterized in that: the tester includes a conductance sensor, a charge detector, an ADC converter and a data processor that are arranged on the inside of the tester housing and are connected successively; the charge detector, the ADC converter and the data processor are respectively connected with the embedded signal processor, and the embedded signal processor is also connected with a display; a test electrode is arranged in the center of one side of the tester shell, and the test electrode is connected with the internal conductance sensor; the tester shell is connected with the A display screen is provided on the opposite side to the side provided with the test electrodes, and the display screen is connected to the display inside the casing of the tester. 2. The body surface conductance tester according to claim 1, characterized in that: a layer of insulating film is arranged on the outside of the test electrodes. 3. The body surface conductance tester according to claim 2, characterized in that: the left side and the right side of the tester housing are respectively provided with a fixing belt, and the left fixing belt is connected to the left side of the tester housing by the fixing belt connecting shaft. side, the right fixing belt is connected to the right side of the tester shell through the fixing belt connecting shaft. 4. The body surface conductance tester according to claim 3, characterized in that: the right fixing belt is sleeved with a fixing ring, and the end of the right fixing belt is provided with a fixing buckle.