CN206460101U - A kind of tower crane ground detection device - Google Patents
A kind of tower crane ground detection device Download PDFInfo
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- CN206460101U CN206460101U CN201720183212.7U CN201720183212U CN206460101U CN 206460101 U CN206460101 U CN 206460101U CN 201720183212 U CN201720183212 U CN 201720183212U CN 206460101 U CN206460101 U CN 206460101U
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Abstract
The utility model discloses a kind of tower crane ground detection device, by battery, first resistor is to the 5th resistance, first electric capacity to the 3rd electric capacity, first FET, second FET, first potentiometer, second potentiometer, test side, switch and ammeter composition, circuit uses the first FET and the second FET Compositional balance bridge circuit, second potentiometer is used to adjust bridge balance, first potentiometer is used to adjust the maximum deflection of ammeter or for adjusting error, tower crane is contacted with test side, inputted after first resistor current limliting to the first FET, electric current inputs to ammeter the intensity for show electrostatic after the conducting of first FET.Compared with prior art, the utility model is used for the earthing detection to tower crane, and whether detection tower crane carries electrostatic, judges whether that electrostatic is excluded clean, to prevent causing to injure operating personnel, causes the generation of security incident, easy to use, the value with popularization and application.
Description
Technical field
The utility model is related to a kind of tower crane servicing unit, more particularly to a kind of tower crane ground detection device.
Background technology
Tower crane is a kind of crane gear also known as " derrick crane " the most frequently used on construction site, with a section spreading
(height) (referred to as " standard knot "), for hanging the raw material of the constructions such as working reinforcing bar, wood stupefied, concrete, steel pipe.Tower crane is work
A kind of essential equipment on the ground.In the prior art, tower crane is metal machinery, the friction of operation etc., can produce electrostatic, if
Electrostatic is too strong, easily injures operating personnel, and accordingly, there exist room for improvement.
Utility model content
The purpose of this utility model is that provides a kind of tower crane ground detection device to solve the above problems.
The utility model is achieved through the following technical solutions above-mentioned purpose：
The utility model by battery, first resistor to the 5th resistance, the first electric capacity to the 3rd electric capacity, the first FET,
Second FET, the first potentiometer, the second potentiometer, test side, switch and ammeter composition, battery is 9V, first resistor
It is that 400 Ω, 3rd resistor are that 500 Ω, the 4th resistance are that 2k Ω, the 5th resistance are 27k Ω, the first electricity for 100 Ω, second resistance
Appearance is that 300uF, the second electric capacity are that 470uF, the 3rd electric capacity are that 0.1uF, the first FET and the second FET model are
32SJ471, the first potentiometer are that 5k Ω, the second potentiometer are that 500 Ω, ammeter are 1mA ammeters；
The positive pole of the battery simultaneously with the first end, the first end of the 5th resistance, the 3rd electric capacity of the second electric capacity first
The first end connection at end, the sliding end of the second potentiometer and the first electric capacity, the negative pole of battery is connected with the first end switched, switched
The second end be connected simultaneously with the second end of the second electric capacity, the first end of the 4th resistance and the first end of second resistance, the 5th is electric
Resistance the second end simultaneously be connected with the second end of the 3rd electric capacity and the grid of the second FET, the source electrode of the second FET and
The first end connection of second potentiometer, one end and the second end of the 4th resistance for draining simultaneously with ammeter of the second FET
Connection, the second end of the second potentiometer is connected with the source electrode of the first FET, and the drain electrode of the first FET is while with first
The second end connection of the sliding end of potentiometer, the first end of the first potentiometer and second resistance, the second end of the first potentiometer leads to
The second end for crossing 3rd resistor and ammeter is connected, the grid of the first FET simultaneously with the second end of the first electric capacity and first
The first end connection of resistance, the second end of first resistor is connected with test side.
The beneficial effects of the utility model are：
The utility model is a kind of tower crane ground detection device, compared with prior art, and the utility model is used for tower crane
Earthing detection, whether detection tower crane carry electrostatic, judge whether that electrostatic is excluded clean, to prevent causing to injure operating personnel, lead
Cause the generation of security incident, easy to use, the value with popularization and application.
Brief description of the drawings
Fig. 1 is circuit structure schematic diagram of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings：
As shown in Figure 1：The utility model is by battery E, first resistor R1 to the 5th resistance R5, the first electric capacity C1 to the 3rd electricity
Hold C3, the first FET Q1, the second FET Q2, the first potentiometer RP1, the second potentiometer RP2, test side J, switch S
With ammeter A compositions, battery E is that 9V, first resistor R1 are that 100 Ω, second resistance R2 are that 400 Ω, 3rd resistor R3 are 500
Ω, the 4th resistance R4 are that 2k Ω, the 5th resistance R5 are that 27k Ω, the first electric capacity C1 are that 300uF, the second electric capacity C2 are 470uF,
Three electric capacity C3 are 0.1uF, the first FET Q1 and the second FET Q2 models are that 32SJ471, the first potentiometer RP1 are
5k Ω, the second potentiometer RP2 are that 500 Ω, ammeter A are 1mA ammeters；
The first end, the 5th resistance R5 first end, the 3rd electric capacity C3 of the positive pole of the battery E simultaneously with the second electric capacity C2
First end, the connection of the second potentiometer RP2 sliding end and the first electric capacity C1 first end, the of battery E negative pole and switch S
One end connect, switch S the second end simultaneously with the second electric capacity C2 the second end, the 4th resistance R4 first end and second resistance R2
First end connection, the 5th resistance R5 the second end the second end simultaneously with the 3rd electric capacity C3 and the second FET Q2 grid
Connection, the second FET Q2 source electrode is connected with the second potentiometer RP2 first end, and the second FET Q2 drain electrode is simultaneously
It is connected with ammeter A one end and the 4th resistance R4 the second end, the second potentiometer RP2 the second end and the first FET Q1
Source electrode connection, the first FET Q1 drain electrode simultaneously with the first potentiometer RP1 sliding end, the first potentiometer RP1 the
One end and the connection of second resistance R2 the second end, the first potentiometer RP1 the second end pass through 3rd resistor R3 and ammeter A the
Two ends are connected, and the first FET Q1 grid connects with the first electric capacity C1 the second end and first resistor R1 first end simultaneously
Connect, first resistor R1 the second end is connected with test side J.
Operation principle of the present utility model is as follows：
Close a switch S, and circuit uses the first FET Q1 and the second FET Q2 Compositional balance bridge circuits, second
Potentiometer RP2 is used to adjust bridge balance, and the first potentiometer RP1 is used for the maximum deflection for adjusting ammeter A or missed for adjusting
Difference, the first electric capacity C1 and the second electric capacity C2 are used to eliminate signal interference, tower crane are contacted with test side J, through first resistor R1 current limlitings
After input to the first FET Q1, electric current, which is inputted to ammeter A, after the first FET Q1 conductings carries out showing the strong of electrostatic
Degree.
General principle of the present utility model and principal character and advantage of the present utility model has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification
Simply illustrate principle of the present utility model, on the premise of the utility model spirit and scope are not departed from, the utility model is also
Various changes and modifications are had, these changes and improvements are both fallen within the range of claimed the utility model.The utility model
Claimed scope is by appended claims and its equivalent thereof.
Claims (1)
1. a kind of tower crane ground detection device, it is characterised in that：By battery, first resistor to the 5th resistance, the first electric capacity to
Three electric capacity, the first FET, the second FET, the first potentiometer, the second potentiometer, test side, switch and ammeter group
It is that 9V, first resistor are that 100 Ω, second resistance are that 400 Ω, 3rd resistor are that 500 Ω, the 4th resistance are 2k Ω, into, battery
Five resistance be 27k Ω, the first electric capacity be 300 μ F, the second electric capacity be 470 μ F, the 3rd electric capacity be 0.1 μ F, the first FET and
Second FET model is that 32SJ471, the first potentiometer are that 5k Ω, the second potentiometer are that 500 Ω, ammeter are 1mA electricity
Flow table；
The positive pole of the battery simultaneously with the first end of the second electric capacity, the first end of the 5th resistance, the first end of the 3rd electric capacity, the
The first end connection of the sliding end of two potentiometers and the first electric capacity, the negative pole of battery is connected with the first end of switch, and the of switch
Two ends are connected with the second end of the second electric capacity, the first end of the 4th resistance and the first end of second resistance simultaneously, the 5th resistance
Second end is connected with the second end of the 3rd electric capacity and the grid of the second FET simultaneously, the source electrode of the second FET and second
The first end connection of potentiometer, the drain electrode of the second FET connects with one end of ammeter and the second end of the 4th resistance simultaneously
Connect, the second end of the second potentiometer is connected with the source electrode of the first FET, the drain electrode of the first FET is simultaneously electric with first
The second end connection of the position sliding end of device, the first end of the first potentiometer and second resistance, the second end of the first potentiometer passes through
The second end connection of 3rd resistor and ammeter, the grid of the first FET is simultaneously electric with the second end of the first electric capacity and first
The first end connection of resistance, the second end of first resistor is connected with test side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720183212.7U CN206460101U (en) | 2017-02-28 | 2017-02-28 | A kind of tower crane ground detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720183212.7U CN206460101U (en) | 2017-02-28 | 2017-02-28 | A kind of tower crane ground detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206460101U true CN206460101U (en) | 2017-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720183212.7U Active CN206460101U (en) | 2017-02-28 | 2017-02-28 | A kind of tower crane ground detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206460101U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110231519A (en) * | 2019-06-18 | 2019-09-13 | 国网河南省电力公司辉县市供电公司 | A kind of electrostatic detection cancellation element |
-
2017
- 2017-02-28 CN CN201720183212.7U patent/CN206460101U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110231519A (en) * | 2019-06-18 | 2019-09-13 | 国网河南省电力公司辉县市供电公司 | A kind of electrostatic detection cancellation element |
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