CN2126741Y

CN2126741Y - Ch-2290 shape electrostatic voltage measuring device

Info

Publication number: CN2126741Y
Application number: CN 90221601
Authority: CN
Inventors: 唐振山; 李华金; 孟明德; 秦广义
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-10-08
Filing date: 1990-10-08
Publication date: 1993-02-03
Anticipated expiration: 2000-10-08

Abstract

The utility model discloses a fishing rod over-line protective cover, belonging to the technical field of fishing tackles. The utility model discloses a the upper end of the protective cover is fixed with the rod cap, and the lower end is fixed with a rod cap opening, a belt, and a rod body; the bulge in the middle can contain and protect over-line magnetic eyes. The utility model discloses a The utility model which has simple structure, convenient operation, and smaller volume can be used for protecting the over-line eyes of a sea rod; the damage caused by the crash with each can be avoided.

Description

CH-2290 shape electrostatic voltage measuring device

In general, the utility model is the measurement mechanism about a kind of electrostatic potential, specifically, is about a kind of pocket non-contact type digital voltmeter.

As everyone knows, so-called static is the long-time electrification phenomenon that does not disappear of electric charge that produces on the various insulators around the people owing to multiple reasons such as frictions, these charged objects can produce electrostatic field around it, when the intensity height of electrostatic field arrives to a certain degree, then electric discharge phenomena can take place.Like this, for such as: accident will work the mischief in the inflammable and explosive environment such as petrochemical industry, fiber, plastics, flour, gunpowder; Simultaneously static for such as: semiconductor, computer industry also can bring harm, thereby people extremely pay close attention to how to avoid and control disaster and the harm that is caused by static.Certainly at first need accurately and easily to measure the height of various object electrified voltage in people's surrounding environment.

The electrostatic potential basic principle of measurement can be with reference to as Fig. 1. shown in electric functional-block diagram illustrated, Fig. 1. in label 1. be the object of a static electrification, label 2. is the electrostatic voltmeter of a routine, distance between sampling electrode and the electrified body is a predetermined distance L, label 3. is made by conductor and shielding box ground connection of above-mentioned electrostatic voltmeter, label 4. is the sampling electrode, distributed capacitance between it and the tested charged object 1. is C1, label 5. is a direct current amplifier, 6. be the gauge outfit of instruction simulation amount, distributed capacitance between sampling electrode 4. and the box body 3. is C2, when distance that this conventional electrostatic voltmeter is placed on above-mentioned and tested charged object is on the position of L the time, then above-mentioned electrostatic voltmeter 2. can measure an electrostatic potential V2, and this voltage can be expressed from the next:

V2＝ωOEA／C2

Wherein, A is the area of electrode 4.;

ω O is the specific inductive capacity of free space; (8.855 * 10 ^{^}-12 faraday/rice)

E is the electric field intensity on the electrode 4.;

C2 is the distributed capacitance between electrode 4. and the box body 3..

Above-mentioned voltage V2 is proportional to the voltage on the actual charged object, through calibrating the virtual voltage that promptly can obtain on the charged object.

Electrostatic voltmeter of the prior art is according to above-mentioned Fig. 1 basically. shown in electric functional-block diagram manufacture and design.For example the ACL300 electrostatic voltmeter of ACL company just is based on this principle manufacturing.

From above-mentioned electrostatic potential measurement statement formula V2=ω OEA/C2, be not difficult to find out, contactless electrostatic voltmeter actual measurement be apart from electrified body (Fig. 1. in label 1.) electric field strength E at L place. so the degree of accuracy of distance L just becomes a key factor of electrostatic potential measuring accuracy, according to the relevant technologies standard, the distance L of electrostatic voltmeter 20KV range of the present utility model is 3CM; The distance L of 40KV range is 6CM.

From the electrostatic voltmeter of prior art, some shortcomings of ubiquity:

First: the reading of the electrostatic potential of prior art is indicated with analog gauge outfit, and reading is not directly perceived, and error is waited a moment greatly;

Second: the electrostatic voltmeter of prior art does not have automatic range from device, causes measurement inconvenience and measuring error big;

The 3rd: the electrostatic voltmeter of prior art has only measurement function, does not monitor the function of alarm.

In order to overcome the above shortcoming of above-mentioned prior art electrostatic voltmeter, the spy provides the utility model electrostatic voltmeter.

A purpose of the present utility model provides the pocket that a kind of numeral shows, contactless electrostatic voltmeter.

Another purpose of the present utility model provides a kind of digital electrostatic voltmeter with automatic indication distance.

A further object of the present invention is to provide alarm function on the basis of above-mentioned digital electrostatic voltmeter, makes this voltage table in the watch-keeping measuring process, in case electrostatic potential surpasses the threshold value of design in advance, this voltage table can be alarmed automatically.

Electrostatic voltmeter of the present utility model has the numeral indication, automatically indication distance and overvoltage alarm be some functions like this, are specially adapted to petrochemical industry, fiber, plastics, food, spray paint, industrial sectors such as gunpowder, semiconductor, computing machine carry out the measurement of on-the-spot electrostatic potential in supervision.

Be described in detail below in conjunction with the physical construction and the electrical structure of Figure of description to electrostatic voltmeter of the present utility model, Figure of description is as follows:

Fig. 1. the circuit block diagram of the fundamental measurement principle of the electrostatic voltmeter that expression is conventional;

Fig. 2. represent the external structure synoptic diagram of first kind of embodiment of electrostatic voltmeter of the present utility model;

Fig. 3. represent the circuit block diagram of first kind of embodiment of electrostatic voltmeter of the present utility model;

Fig. 4 a represents the synoptic diagram of external structure of second kind of embodiment of electrostatic voltmeter of the present utility model;

Fig. 4 b represents the view that the external structure synoptic diagram of second kind of embodiment of electrostatic voltmeter of the present utility model is seen from directions X;

Fig. 5. represent the functional-block diagram of automatic indication distance means of second kind of embodiment of electrostatic voltmeter of the present utility model

Referring now to Fig. 2. the arrangement of external structure of wherein having expressed first kind of embodiment of electrostatic voltmeter of the present utility model arranges that synoptic diagram is illustrated:

Label 7. is a box body of being made by conductor material, this box body can be made by the conductor plastics, also can make with general plastics, spray one deck conductive materials then, this box body 7. has contained the whole electrical equipment of this electrostatic voltmeter and the parts of machinery, also play the effect of shielding and ground connection simultaneously, be provided with a digital indicator 8 in the front of box body 7., this display should be a kind of low consumed electricity-saving type digital indicator, for example be seven sections liquid crystal digital displays, below label 8, be provided with a school zero switch 9, this switch is a kind of special push-button switch, when switch 9 is pressed, the sampling electrostatic induction of electrostatic voltmeter of the present utility model screen shorted to earth, this moment, the numeral demonstration should be complete zero; Promptly can proper testing and discharge this switch, survey side, the right side at box body is provided with the break-make that power switch 10 is used for controlling this voltage table voltage, be provided with in the lower-left of box body 7 side and lay battery inlet and lid, as shown in the reference numeral 11, be provided with a sampling electrostatic induction screen 4 in the top side of this box body 7, this induction screen is made for good conductor, by the materials for support of high insulating property, and does special high insulating process processing around it.

The circuit structure of first embodiment of the present utility model is described below with reference to Fig. 3, wherein label 4 is sampling electrostatic induction screen, its voltage supply that collects is to the mould---number converter with label 12 expressions, this converter converts aanalogvoltage to digital voltage and delivers to the driver of being represented by label 13 again, and then deliver to liquid crystal display 14 and shown, this LCD can be one three and half a LCD, simultaneously through mould--the digital voltage signal that number converter 12 produces is delivered to an alarm identification circuit 15 again, if surpassed the alarm voltage threshold that sets in advance, then export an alarm signal and give alarm signal driving circuit 16, drive a hummer 17 then, send alarm call, by above description, people have been well understood to machinery and the electrical structure details that numeral of the present utility model shows and have the electrostatic voltmeter of alarm function.

Below with reference to Fig. 4. go on to say the structure arrangement situation of the digital electrostatic voltmeter that has automatic distance of second embodiment of the present utility model, can know from Fig. 4 a and to find out, Fig. 4 a has similar structural arrangement and layout (wherein identical label is the identical parts of expression) with Fig. 2, but, different is, the basin body 7. positive tops of Fig. 4 a are provided with two

pilot lamp

18 and 19 of indication distance automatically, the sampling induction screen of green light 18 bright these electrostatic voltmeters of expression and the distance between the tested charged object are 3CM, and this moment, the range of this electrostatic voltmeter was 20KV; When red light 19 is bright, represent that the sampling electrostatic induction screen of this electrostatic voltmeter and distance between the tested charged object are 6CM, the range of this electrostatic voltmeter is 40KV at this moment.

Refer again to Fig. 4 b below, in the drawings except that being provided with induction screen 4, also be provided with infrared device of representing with label 20 that is used for distance indication automatically and the infrared detection device of representing with label 21 that is used for automatic distance indication, can realize the automatically function of distance indication by some auxiliary circuits in above-mentioned two devices 20,21 and the machine, also will further be described below its detailed principle of operation.

With reference to Fig. 5, there is shown the principle schematic of the utility model electrostatic voltmeter focus reflection spacing, number in the figure 1. is still represented the object of static electrification, label 4. expression induction screens, on same straight line of induction screen, be provided with the infrared device of label 20 expressions and the infrared detection device of representing with label 21, the driving circuit device that also has the pilot lamp of representing with the driving circuit device of the infrared device of label 22 expressions with label 23 18 that links to each other simultaneously with above-mentioned two devices, design makes infrared device 20 after launching a branch of infrared ray under the driving of the driving circuit device of infrared device and running into tested charged object 1., reflecting the distance that is received by the infrared detection device just in time is the distance L of regulation, for example be 3CM, the infrared detection device produces electric current under the irradiation of infrared beam, under the driving of drive circuit of indicator device, light pilot lamp, for example be that green light is bright, so just realized the automatic indication of measuring distance, as for the different distance of indication, as long as according to general geometrical principle, change the angle of infrared emission device and measured device, be easy to realize.

Though be described in detail in conjunction with the physical construction and the circuit structure of Figure of description to two kinds of embodiment of the present utility model; but for the professional and technical personnel; do not need to make performing creative labour and just can make change and improve, limited by being attached to the following claim book thereby the applicant declares protection domain of the present utility model to electrostatic voltmeter of the present utility model.

Claims

1, a kind of contactless electrostatic voltmeter, the box body of this voltage table is made by a kind of conductive material, the top of this box body is provided with a sampling induction screen, support by insulating material around this induction screen, it is insulated mutually with box body, the inside of this box body is provided with the printed circuit board of the electric components that this voltage table is installed and for this voltage table provides the battery of power supply, it is characterized in that:

Be provided with a digital indicator in the front of box body, the printed board of this box body inside is provided with a mould--number converter device, this mould--number converter links with above-mentioned induction screen with through driver and digital indicator respectively, thereby this induction screen is gone up the electrostatic potential of induction by mould--and number conversion becomes digital voltage signal to show on digital indicator; Also be provided with an alarm device in the above-mentioned printed board, when tested voltage surpasses alarming threshold voltage, send the audibility alarm signal.

2,, it is characterized in that digital indicator is a liquid crystal seven-segment display according to the electrostatic voltmeter of claim 1..

3,--number converter and display driver are integrated moulds--number converter that according to the electrostatic voltmeter of claim 1., it is characterized in that mould.

4, according to the electrostatic voltmeter of claim 1., it is characterized in that alarm device is by alarming recognition device and alarming drive unit and form, store the alarming threshold information of voltage in the alarm recognition device, when tested electrostatic potential surpasses alarming threshold voltage, the audibility alarm signal is sent in above-mentioned alarm device action.

5, a kind of contactless electrostatic voltmeter of automatic indication measurement distance, the box body of this voltage table is made by a kind of conductive material, the top of this box body is provided with a sampling induction screen, support by insulating material around this induction screen, it is insulated mutually with box body, the inside of this box body is provided with printed circuit board that this voltage table electric components is installed and for voltage table provides the battery of power supply, it is characterized in that:

Be provided with a digital indicator in the front of box body, the printed circuit board of the inside of this box body is provided with a mould--number converter device, this mould--number converter links with above-mentioned induction screen with through driver and numeral demonstration respectively, thereby this induction screen is gone up the electrostatic potential of induction by mould--and number converter converts digital voltage signal to and shows on digital indicator; Also be provided with an alarm device on the above-mentioned printed circuit board, when tested electrostatic potential surpasses alarming threshold voltage, send the audibility alarm signal; In the front of above-mentioned box body two pilot lamp are set also, be used for correct measuring distance, an infrared apparatus and an infrared detection device device are set on the top of above-mentioned box body, thereby the circuit inner relevant with box body constitutes the reflective automatic range indicating system of infrared focus together.

6,, it is characterized in that digital indicator is a liquid crystal seven-segment display according to the electrostatic voltmeter of claim 5..

7,, it is characterized in that mould according to the electrostatic voltmeter of claim 5.--number converter and display driver are integrated moulds--number converter is in an integrated display driver.

8, according to the electrostatic voltmeter of claim 5., it is characterized in that, alarm device is made up of alarm recognition device and alarm signal driver, store the information of alarming threshold voltage in the alarm recognition device, when tested electrostatic potential surpasses alarming threshold voltage, the audibility alarm signal is sent in above-mentioned alarm device action.

9,, it is characterized in that angle that infrared emission device and infrared detection device install is different can obtain different range finding distances according to the electrostatic voltmeter of claim 5..