CN210109216U - A human body electrostatic measurement device - Google Patents

Abstract

The utility model belongs to prevent static test field, especially relate to a human static measuring device. The body static electricity measuring device comprises a shell, a cover body, a rotating shaft, a control circuit board, a display module and a pressure sensor, wherein the display module and the pressure sensor are respectively and electrically connected with the control circuit board; the human body static electricity measuring device further comprises a first metal static electricity arm fixed on the rotating shaft and a second metal static electricity arm movably connected with the rotating shaft, the rotating shaft is connected with a metal conductor, the pressure sensor is fixed in a rotating area of the second metal static electricity arm, the rotating shaft is made of a conductive material, and charges are transmitted among the first metal static electricity arm, the second metal static electricity arm, the rotating shaft and the metal conductor. Therefore, the human static electricity measuring device does not need to be grounded, can be worn on the wrist, can continuously test and measure human static electricity at any time, and if the wrist is electrified, the static voltage value can be output through the display module, so that the working personnel can be effectively reminded of carrying out static electricity release, and the danger of static electricity in the work is reduced to the maximum extent.

Description

A human body electrostatic measurement device

technical field

The utility model belongs to the field of anti-static testing, in particular to a human body electrostatic measuring device.

Background technique

There are mainly two ways to measure static electricity in the prior art electrostatic voltage measuring equipment: contact type and non-contact type. Regardless of contact or non-contact, the principle of electrostatic voltage measurement is the inductive voltage division method. As shown in Figure 1, electrostatic voltage E ₀ is generated on the left, and area A is the electrostatic voltage area to be measured. After the voltage is divided by capacitor C ₀ and capacitor C _b , the voltage E _{b is measured at both ends of capacitor C b .} However, this method must require that the entire system needs to be grounded and the test is intermittent. Moreover, the existing electrostatic voltage measuring equipment is bulky and heavy, and cannot be carried around.

Utility model content

The purpose of the utility model is to provide a human body electrostatic measurement device, which aims to solve the problems that the existing electrostatic voltage measurement equipment requires that the entire system needs to be grounded, and the test is intermittent, bulky, heavy, and cannot be carried around.

The utility model provides a human body electrostatic measurement device, which comprises a casing, a cover body, a rotating shaft, a control circuit board, a display module and a pressure sensor respectively electrically connected with the control circuit board; the human body electrostatic measurement device further comprises a body fixed on the rotating shaft The first metal electrostatic arm and a second metal electrostatic arm movably connected to the rotating shaft, the rotating shaft is connected with a metal conductor, the pressure sensor is fixed in the rotating area of the second metal electrostatic arm, the rotating shaft is a conductive material, and the charge is in the first metal The electrostatic arm, the second metal electrostatic arm, the rotating shaft and the metal conductor are transmitted; the rotating shaft, the control circuit board, the pressure sensor, the first metal electrostatic arm and the second metal electrostatic arm are built in the space formed by the cooperation of the casing and the cover, The display module is mounted on the cover.

The utility model also provides a human body static electricity measuring device, which comprises a casing, a cover body, a rotating shaft, a control circuit board, a display module and a pressure sensor respectively electrically connected with the control circuit board; the human body static electricity measuring device further comprises a metal conductor, a A first metal electrostatic arm fixed on the rotating shaft and a second metal electrostatic arm movably connected to the rotating shaft, the first metal electrostatic arm and the second metal electrostatic arm respectively directly contact the metal conductor or connect with the metal conductor through a metal wire , the pressure sensor is fixed in the rotation area of the second metal electrostatic arm, and the charge is transferred between the first metal electrostatic arm, the second metal electrostatic arm and the metal conductor; the rotating shaft, the control circuit board, the pressure sensor, the first metal electrostatic arm and the first metal electrostatic arm Two metal electrostatic arms are built in the space formed by the shell and the cover, and the display module is installed on the cover.

Further, the rotating shaft is respectively connected to the middle part of the first metal electrostatic arm and the middle part of the second metal electrostatic arm, the first metal electrostatic arm is symmetrical around the rotating shaft, the second metal electrostatic arm is symmetrical around the rotating shaft, the first metal electrostatic arm and the second metal electrostatic arm are symmetrical. The electrostatic arms are symmetrical around the rotation axis; the pressure sensor is mounted on the control circuit board, and the control circuit board is located under the second metal electrostatic arm.

Further, the second metal electrostatic arm and the first metal electrostatic arm are respectively provided with a first through hole matched with the rotating shaft; the cover body is provided with a second through hole matched with the display module; the casing and the control circuit board are respectively provided with In the third through hole matched with the metal conductor, the first metal electrostatic arm and the second metal electrostatic arm are located on the same plane; the metal conductor is arranged outside the casing or in the casing.

Further, two fixing blocks extend from the inner side of the housing, and a groove is arranged in the middle of the fixing block, and the groove is used for fixing the first metal electrostatic arm; the two sides of the control circuit board are provided with a card slot matched with the fixing block.

Further, the human body electrostatic measurement device further includes a wristband, the wristband is fixed on the casing, and the human body electrostatic measurement device is in the form of a watch or a bracelet.

In the present invention, since the human body electrostatic measurement device includes a first metal electrostatic arm fixed on the rotating shaft and a second metal electrostatic arm movably connected with the rotating shaft, the rotating shaft is connected with a metal conductor, and the pressure sensor is fixed on the second metal electrostatic arm. In the rotating area of the metal electrostatic arm, the charge is transferred between the first metal electrostatic arm, the second metal electrostatic arm, the rotating shaft and the metal conductor; the rotating shaft is a conductive material, and the charge is transferred between the first metal electrostatic arm, the second metal electrostatic arm, the rotating shaft and the Transfer between metal conductors; alternatively, the metal conductor directly contacts the first metal electrostatic arm and the second metal electrostatic arm, or is connected with the first metal electrostatic arm and the second metal electrostatic arm through a metal wire, and the charge is in the first metal electrostatic arm. , transfer between the second metal electrostatic arm and the metal conductor. Therefore, the human body static electricity measuring device provided by the embodiment of the present invention does not need to be grounded, and can be worn on the wrist for continuous testing to measure the static electricity of the human body at any time. If the wrist is charged, the electrostatic voltage value can be output through the display module, for example, displayed on the display screen or broadcast through the loudspeaker, and when the specified value is exceeded, the loudspeaker can give an alarm. This can effectively remind the staff to discharge static electricity and minimize the danger of static electricity during work.

Description of drawings

FIG. 1 is a schematic diagram of a prior art electrostatic voltage measurement.

FIG. 2 is a schematic exploded view of the structure of a human body electrostatic measurement device provided by an embodiment of the present invention.

FIG. 3 is a schematic structural diagram of the assembled human body electrostatic measuring device provided by the embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and beneficial effects of the present utility model clearer, the present utility model 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, and are not intended to limit the present invention.

In order to illustrate the technical solutions of the present utility model, the following specific embodiments are used to illustrate.

Please refer to FIG. 2 and FIG. 3 , the human body electrostatic measurement device provided by the embodiment of the present invention includes a housing 1, a cover body 2, a rotating shaft 4, a control circuit board 5, and a display module 3 electrically connected to the control circuit board 5 and a pressure Sensor 6; the human body electrostatic measurement device also includes a first metal electrostatic arm 7 fixed on the rotating shaft 4 and a second metal electrostatic arm 8 movably connected with the rotating shaft 4, the rotating shaft 4 is connected with a metal conductor 9, and the metal conductor 9 Can be in contact with the human wrist. The pressure sensor 6 is fixed on the rotating area of the second metal electrostatic arm 8. For example, the pressure sensor 6 is installed on the control circuit board 5, and the control circuit board 5 is installed on the housing 1. Specifically, the pressure sensor 6 may be located away from the first metal electrostatic force. at distance r from the end of arm 7. The shaft 4 is made of conductive material. Charges are transferred between the first metal electrostatic arm 7 , the second metal electrostatic arm 8 , the rotating shaft 4 and the metal conductor 9 . The rotating shaft 4 , the control circuit board 5 , the pressure sensor 6 , the first metal electrostatic arm 7 and the second metal electrostatic arm 8 are built in the space formed by the cooperation between the casing 1 and the cover 2 , and the display module 3 is installed on the cover 2 . The metal conductor 9 may be located outside the housing 1 or embedded in the housing 1 .

The metal conductor 9 in the human body electrostatic measurement device provided in the first embodiment of the present invention may not be connected with the rotating shaft 4, but directly contact the first metal electrostatic arm 7 and the second metal electrostatic arm 8, or contact the first metal electrostatic arm 8 through a metal wire. When the electrostatic arm 7 is connected to the second metal electrostatic arm 8 , the rotating shaft 4 can be made of insulating material, and charges are transferred between the first metal electrostatic arm 7 , the second metal electrostatic arm 8 and the metal conductor 9 .

In the embodiment of the present invention, the rotating shaft 4 is connected to the middle part of the first metal electrostatic arm 7 and the middle part of the second metal electrostatic arm 8 respectively. The first metal electrostatic arm 7 may be symmetrical or asymmetric around the rotating shaft 4, and the second metal electrostatic arm 7 The metal electrostatic arm 8 is symmetrical around the rotation axis 4 , and the first metal electrostatic arm 7 and the second metal electrostatic arm 8 are symmetrical around the rotation axis 4 . Therefore, the influence of the self-gravity of the first metal electrostatic arm 7 and the second metal electrostatic arm 8 on the pressure sensor 6 is offset by the lever principle. That is to say, the gravity of the half of the second metal electrostatic arm 8 close to the pressure sensor 6 will be offset by the gravity of the other half through the rotating shaft 4, just like the principle of a balance. The first metal electrostatic arm 7 and the second metal electrostatic arm 8 are located on the same plane. The human body electrostatic measurement device provided by the embodiment of the present invention may be in the form of a watch or a wristband.

In the embodiment of the present invention, the cover body 2 is provided with a second through hole 10 matched with the display module 3 , the housing 1 and the control circuit board 5 are respectively provided with a third through hole 15 matched with the metal conductor 9 , the second metal The electrostatic arm 8 and the first metal electrostatic arm 7 are respectively provided with first through holes 11 which are matched with the rotating shaft 4 . The first metal electrostatic arm 7 and the second metal electrostatic arm 8 are located on the same plane.

In the embodiment of the present invention, two fixing blocks 12 extend from the inner side of the housing 1 , and a groove 13 is formed in the middle of the fixing blocks 12 , and the groove 13 is used for fixing the first metal electrostatic arm 7 . The two sides of the control circuit board 5 are provided with card slots 14 matched with the fixing block 12 , so that the control circuit board 5 will not be displaced.

The human body electrostatic measurement device provided by the embodiment of the present invention further includes a wristband 16, and the wristband 16 is fixed on the casing 1, so that the human body electrostatic measurement device can be worn on the wrist to measure the static electricity of the human body in real time.

The working principle of the human body electrostatic measurement device provided by the embodiment of the present invention is as follows:

Since the human body is similar to a conductor, practitioners mainly work with their hands. Therefore, most of the static electricity generated by the human body can be detected or released by bare hands. Therefore, when the human body electrostatic measuring device provided by the embodiment of the present invention is worn on the wrist, if the wrist is charged, the electric charge of the human body is transmitted to the metal rotating shaft through the metal conductor, and then transmitted to the first metal electrostatic arm and the second metal rotating shaft by the metal rotating shaft. The metal electrostatic arm, or the electric charge of the human body is directly transferred to the first metal electrostatic arm and the second metal electrostatic arm through the metal conductor or through the metal wire; the charge is evenly distributed on the first metal electrostatic arm and the second metal electrostatic arm, so that An electrostatic force is generated between the first metal electrostatic arm and the second metal electrostatic arm. Since the second metal electrostatic arm is movable, the electrostatic force will make the second metal electrostatic arm rotate away from the first metal electrostatic arm, and when it reaches the position of the pressure sensor, it is blocked by the pressure sensor and cannot rotate. The repulsive force acts on the pressure sensor and is tested. Due to the symmetry of the first metal electrostatic arm and the second metal electrostatic arm, the pressure is not affected by its own gravity. When the pressure sensor measures the pressure, the force between the first metal electrostatic arm and the second metal electrostatic arm is simplified to the force between two point charges, according to the formula of Coulomb's law: U=kQ ₁ Q ₂ /r, or F=kQ ₁ Q ₂ /r ² , where U is the voltage between the first metal electrostatic arm and the second metal electrostatic arm, and F is the voltage between the first metal electrostatic arm and the second metal electrostatic arm force, K is the Coulomb constant, k=9.0×10 ⁹ Nm ² /C ² , Q1, Q2 are the electric quantities located in the first metal electrostatic arm and the second metal electrostatic arm respectively, r is the distance between the pressure sensor and the first metal electrostatic arm distance. The values of Q1 and Q2 can be obtained by calculation, that is, the value of electrostatic charge. Then, according to Coulomb's formula, the electrostatic voltage when the hand is in direct contact with the object can be calculated (at this time, the distance r is calculated with a small distance such as 0.1mm, which represents direct contact). After the control circuit board receives the data from the pressure sensor, it calculates the electrostatic voltage value and outputs it through the display module.

In the present invention, since the human body electrostatic measurement device includes a first metal electrostatic arm fixed on the rotating shaft and a second metal electrostatic arm movably connected with the rotating shaft, the rotating shaft is connected with a metal conductor, and the pressure sensor is fixed on the second metal electrostatic arm. In the rotating area of the metal electrostatic arm, the charge is transferred between the first metal electrostatic arm, the second metal electrostatic arm, the rotating shaft and the metal conductor; the rotating shaft is a conductive material, and the charge is transferred between the first metal electrostatic arm, the second metal electrostatic arm, the rotating shaft and the Transfer between metal conductors; alternatively, the metal conductor directly contacts the first metal electrostatic arm and the second metal electrostatic arm, or is connected with the first metal electrostatic arm and the second metal electrostatic arm through a metal wire, and the charge is in the first metal electrostatic arm. , transfer between the second metal electrostatic arm and the metal conductor. Therefore, the human body static electricity measuring device provided by the embodiment of the present invention does not need to be grounded, and can be worn on the wrist for continuous testing to measure the static electricity of the human body at any time. If the wrist is charged, the electrostatic voltage value can be output through the display module, for example, displayed on the display screen or broadcast through the loudspeaker, and when the specified value is exceeded, the loudspeaker can give an alarm. This can effectively remind the staff to discharge static electricity and minimize the danger of static electricity during work.

The above 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 present invention. within the scope of protection of the utility model.

Claims (10)

1. A human body static electricity measuring device is characterized by comprising a shell, a cover body, a rotating shaft, a control circuit board, a display module and a pressure sensor, wherein the display module and the pressure sensor are respectively and electrically connected with the control circuit board; the human body static electricity measuring device also comprises a first metal static electricity arm fixed on the rotating shaft and a second metal static electricity arm movably connected with the rotating shaft, the rotating shaft is connected with a metal conductor, the pressure sensor is fixed in a rotating area of the second metal static electricity arm, the rotating shaft is made of a conductive material, and charges are transferred among the first metal static electricity arm, the second metal static electricity arm, the rotating shaft and the metal conductor; the rotating shaft, the control circuit board, the pressure sensor, the first metal electrostatic arm and the second metal electrostatic arm are arranged in a space formed by matching the shell and the cover body, and the display module is arranged on the cover body.

2. The human body static electricity measuring apparatus according to claim 1, wherein the rotation shafts are respectively connected to a middle portion of the first metal static arm and a middle portion of the second metal static arm, the first metal static arm is symmetrical around the rotation shaft, the second metal static arm is symmetrical around the rotation shaft, and the first metal static arm and the second metal static arm are symmetrical around the rotation shaft; the pressure sensor is installed on a control circuit board, and the control circuit board is located below the second metal electrostatic arm.

3. The human body static electricity measuring apparatus according to claim 1, wherein the second metal static electricity arm and the first metal static electricity arm are respectively provided with a first through hole engaged with the rotation shaft; the cover body is provided with a second through hole matched with the display module; the shell and the control circuit board are respectively provided with a third through hole matched with the metal conductor, and the first metal electrostatic arm and the second metal electrostatic arm are positioned on the same plane; the metal conductor is arranged outside or in the shell.

4. The human body static electricity measuring device according to claim 1, wherein two fixing blocks extend from the inner side of the case, and a groove is provided in the middle of the fixing blocks, the groove being used for fixing the first metal static electricity arm; and clamping grooves matched with the fixing blocks are arranged on two sides of the control circuit board.

5. The human body static electricity measuring apparatus according to claim 1, further comprising a wrist band fixed to the case, wherein the human body static electricity measuring apparatus is in the form of a watch or a wrist band.

6. A human body static electricity measuring device is characterized by comprising a shell, a cover body, a rotating shaft, a control circuit board, a display module and a pressure sensor, wherein the display module and the pressure sensor are respectively and electrically connected with the control circuit board; the human body static electricity measuring device also comprises a metal conductor, a first metal static arm fixed on the rotating shaft and a second metal static arm movably connected with the rotating shaft, wherein the first metal static arm and the second metal static arm are respectively and directly contacted with the metal conductor or connected with the metal conductor through metal wires; the rotating shaft, the control circuit board, the pressure sensor, the first metal electrostatic arm and the second metal electrostatic arm are arranged in a space formed by matching the shell and the cover body, and the display module is arranged on the cover body.

7. The human body static electricity measuring apparatus according to claim 6, wherein the rotation shafts are respectively connected to a middle portion of the first metal static arm and a middle portion of the second metal static arm, the first metal static arm is symmetrical around the rotation shaft, the second metal static arm is symmetrical around the rotation shaft, and the first metal static arm and the second metal static arm are symmetrical around the rotation shaft; the pressure sensor is installed on a control circuit board, and the control circuit board is located below the second metal electrostatic arm.

8. The human body static electricity measuring apparatus according to claim 6, wherein the second metal static electricity arm and the first metal static electricity arm are respectively provided with a first through hole engaged with the rotation shaft; the cover body is provided with a second through hole matched with the display module; the shell and the control circuit board are respectively provided with a third through hole matched with the metal conductor, and the first metal electrostatic arm and the second metal electrostatic arm are positioned on the same plane; the metal conductor is arranged outside or in the shell.

9. The human body static electricity measuring device according to claim 6, wherein two fixing blocks extend from the inner side of the case, and a groove is provided in the middle of the fixing blocks, the groove being used for fixing the first metal static electricity arm; and clamping grooves matched with the fixing blocks are arranged on two sides of the control circuit board.

10. The human body static electricity measuring apparatus according to claim 6, further comprising a wrist band fixed to the case, wherein the human body static electricity measuring apparatus is in the form of a watch or a wrist band.

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