CN210380803U

CN210380803U - Contactless gravity switch

Info

Publication number: CN210380803U
Application number: CN201921862321.7U
Authority: CN
Inventors: 杨华伟; 张佳; 钱娇蕊; 王安德; 王旭; 石文浩
Original assignee: Hubei Jiangshan Heavy Industries Co ltd
Current assignee: Hubei Jiangshan Heavy Industries Co ltd
Priority date: 2019-11-01
Filing date: 2019-11-01
Publication date: 2020-04-21
Anticipated expiration: 2029-11-01

Abstract

A contactless gravity switch comprises a support, a pendulum bob, a left proximity switch and a right proximity switch, wherein a bearing is fixed at the upper end of the support, the other end of a pin bolt penetrating through the bearing penetrates through a mounting hole at the upper end of the pendulum bob, the pendulum bob and the pin bolt are fastened together by a fastening nut, and the left proximity switch and the right proximity switch which are positioned at the left side and the right side of the lower end of the pendulum bob are mounted at the lower part of the support; the pendulum bob is used for being connected with the input end of the control circuit board, and the first indicator light, the second indicator light and the third indicator light are connected with the output end of the control circuit board. The utility model discloses a proximity switch is safe and reliable more. Compared with a metal ball type gravity switch, the accuracy of the detection of small-angle change is high.

Description

Contactless gravity switch

Technical Field

The utility model belongs to a gravity switch, concretely relates to such as detection control device as electronic leveling, plane degree detection, straightness warning hang down.

Background

At present, a gravity switch (a tilt switch) for detecting the verticality of an object or vibrating an element generally adopts a mercury switch, the mercury switch can enable internal mercury droplets to flow to a lower position in a container due to the relation of gravity, and mercury belongs to a metal material and has conductivity. The biggest disadvantage of mercury is its toxicity, so a metal ball type gravity switch has been developed, which relies on a copper ball plated on its inner surface to roll under the action of gravity and then contact with an electrode, thereby conducting a circuit. The disadvantage of the above-described configuration is the lack of accuracy in detecting small angular changes, which is often used in applications where large angular changes are detected, particularly in the case of changes from vertical to horizontal or from horizontal to vertical. The alarm device is mainly applied to occasions such as vibration alarm, earthquake alarm and the like, such as a steam iron in household appliances, a washing machine, the cover opening of a horizontal type refrigerated cabinet, a space heater, an automatic vending machine and the like.

Disclosure of Invention

An object of the utility model is to overcome prior art's the aforesaid not enough, and provide a contactless gravity switch for levelness detects, safe and reliable, to the accurate height that the small-angle change detected.

The utility model provides a technical scheme that technical problem adopted is: the pendulum bob is fastened with the pin bolt by a fastening nut, and the left proximity switch and the right proximity switch which are positioned at the left side and the right side of the lower end of the pendulum bob are arranged at the lower part of the support; the pendulum bob is used for being connected with the input end of the control circuit board, and the first indicator light, the second indicator light and the third indicator light are connected with the output end of the control circuit board.

The control circuit board comprises a decoder, wherein the input end B of the decoder is connected with a second upper pull resistor R2 and a right proximity switch K2, the input end A of the decoder is connected with a first upper pull resistor R1 and a left proximity switch K1, the input end C of the decoder and the input end D of the decoder are grounded, and the output end of the decoder is connected with a first indicator lamp, a second indicator lamp and a third indicator lamp through an output driving circuit.

The decoder is a CD 4515.

The first indicator light is located in the middle, the second indicator light is located on the left side of the first indicator light, and the third indicator light is located on the right side of the first indicator light.

The first indicator light is a green light, and the second indicator light and the third indicator light are red lights.

The box body is also included, the support is arranged outside the left side of the box body, the first indicator light, the second indicator light and the third indicator light are arranged on the box body, and the control circuit board is arranged in the box body through the bracket.

And the control circuit board is connected with an aviation socket. The aviation socket is used for power supply and left and right inclined signal output of a gravity switch, and the universal connector and the cable are connected with an external control circuit.

The pendulum bob is in a free rotation state, the pendulum bob can rotate towards the inclination direction simultaneously when the gravity changes, when the pendulum bob is in a horizontal state, the left proximity switch and the right proximity switch can sense the pendulum bob and output simultaneously, the two output signals are sent to a logic circuit on a control circuit board for decoding, the current code is designated as the horizontal state, the output is 0, and an indicator lamp is driven to light through a corresponding terminal to represent the horizontal state; when the pendulum bob is restrained by gravity to rotate, one of the left proximity switch and the right proximity switch cannot sense the other one of the left proximity switch and the right proximity switch, the other one of the left proximity switch and the right proximity switch always senses the other one of the left proximity switch and the right proximity switch, the two signals are sent to a logic circuit on a control circuit board to be decoded, the code at the moment is designated to be in a tilting state, the designated terminal output is 1, and an indicator lamp is driven to light through the corresponding terminal to indicate the tilting state in a certain direction.

On the one hand, compare with mercury switch, the utility model discloses a proximity switch is safe and reliable more. On the other hand, compare with prill ball formula gravity switch, the utility model discloses a proximity switch is high to the accuracy that the small-angle change detected.

Drawings

Fig. 1 is an external view of the present invention.

Fig. 2 is an exploded assembly view of the present invention.

Fig. 3 is a front view of the inside of the utility model after the box is removed.

Fig. 4 is a schematic circuit diagram of the present invention.

In the figure, 1, a pendulum bob, 2, a fastening nut, 3, a support, 4, a bearing, 5, a bolt, 6, a locking nut, 7, a left proximity switch, 8, a right proximity switch, 9, an indicator light, 10, a box body, 11, an aviation socket, 12, a screw, 13, a support, 14, a control circuit board, 15, a nut and 16, a bottom plate.

Detailed Description

For clarity, the working principle of the utility model is introduced first: the selected proximity switch is an inductive proximity switch for inducing metal substances, has the characteristics of high reaction speed and non-contact induction, and when a metal object longitudinally approaches to the induction surface of the proximity switch for an effective distance, the oscillation frequency of a coil in the induction surface is changed due to the generation of eddy current caused by the addition of external metal, an internal processing circuit can drive an internal triode to be conducted under the state, and signals are output. The present invention will be described in further detail with reference to the accompanying drawings.

In fig. 1-3, the utility model is composed of a pendulum bob 1, a fastening nut 2, a support 3, a bearing 4, a pin bolt 5, a proximity switch, a control circuit board and the like.

Wherein: the bearing 4 is fixed on the support 3, the other end of the pin bolt 5 penetrating through the bearing 4 penetrates into the pendulum bob 1, and the fastening nut 2 fastens the pendulum bob 1 and the pin bolt 5 together, so that the pendulum bob 1 can freely swing around the bearing 4; the left and right proximity switches 7 and 8 are arranged at the lower part of the support 3, and the sensing surfaces can be simultaneously sensed with the pendulum bob when the inclination does not occur, namely, the left and right proximity switches 7 and 8 simultaneously output under the condition of electrifying; the logic circuit in the control circuit board 14 decodes the state, outputs 0, and determines that the current switch is in the horizontal state. When the pendulum bob 1 tilts under the condition of gravity constraint, one of the left and

accessible switches

7 and 8 cannot sense the pendulum bob, the other one of the left and accessible switches always senses the pendulum bob, the logic circuit in the control circuit board 14 decodes the state, the output of the designated terminal is 1, and the current switch is judged to be in the tilting state of one side.

The working process of the utility model is as follows:

install gravity switch on the plane that needs measurement control, under the initial condition, two proximity switches all have signal output to control circuit board because of sensing the signal of pendulum simultaneously about detecting the usefulness, and at this moment, decode through digital logic circuit on the circuit board and export to 0, the indicator lamp green lamp of box body upper end lights, shows that the measurement plane is in the horizontality.

When the plane takes place the slope, the pendulum can be rotatory to the slope side under the restraint of gravity, and at this moment, two proximity switches about can appear the condition that a certain switch can not respond to the pendulum, that is to say that a certain proximity switch does not respond to, no signal output, and another proximity switch has signal output always, and a certain appointed terminal output is 1 after the digital logic circuit decodes on the circuit board, and the red pilot lamp light of box body upper end slope direction is lighted, shows to measure the plane and inclines to this direction.

The working process of the inclination determination in the other direction is the same as above.

In fig. 4, the utility model discloses a control circuit board adopts digital integrated circuit CD4514 as the components and parts of signal input, output, through changing 16 total input combinations from 0000~1111 of the difference of its input level change state, with the output high level of input corresponding relation, and the output is unique. In the figure, U1 is a CD4514 integrated circuit, R1 and R2 are pull-up resistors, K1 and K2 are components having switching value outputs, i.e., a left proximity switch K1 and a right proximity switch K2, and circuits in a dashed line frame in the figure are output driving circuits. CD4514 is a 4-16 line decoder, which can decode the BCD code (commonly known as 8421 code) from the input end and output it uniquely.

The utility model adopts a digital integrated circuit CD4514 as the core of signal input and output, 16 kinds of input combinations are totally selected from 0000-1111 through changing the different input level change states, and the high level is output by the pin corresponding to the input; according to the internal working principle of the CD4514 integrated circuit, an ST end, namely a pin 1, is connected with the positive electrode of a power supply, and a high level, namely a logic 1, is kept; the INH terminal, pin 23, is connected to the negative terminal of the power supply and is kept at a low level, i.e., logic 0, so that the CD4514 realizes a normal and timely decoding working state. The R1 and R2 are used as pull-up resistors of the input end A, B of the U1, that is, when the switches of the left proximity switch K1 and the right proximity switch K2 are not closed, the level of the A, B terminal is 1, and when the switches of the left proximity switch K1 and the right proximity switch K2 are closed, the level of the A, B terminal is 0.

And (3) logic control process: when the left proximity switch K1 and the right proximity switch K2 are switched off, namely the level of the input end is 0011, the corresponding pin 8 outputs high level to drive the rear switch circuit to execute corresponding action; when the K1 is closed and the K2 is opened, namely the level of the input end is 0010, the corresponding pin 10 outputs high level to drive the following switch circuit to execute corresponding action; when the K1 is switched off and the K2 is switched on, namely the level of the input end is 0001, the corresponding pin 9 outputs high level to drive the following switch circuit to execute corresponding action; when both K1 and K2 are closed, i.e. the input terminal level is 0000, the corresponding pin 11 outputs a high level to drive the following switch circuit to execute the corresponding operation. Because the output drive circuit type is various, the utility model discloses do not explain output drive circuit.

The utility model discloses a main device of control circuit only has 3: u1, R1, R2, this has realized the miniaturization and the simplification of logic control circuit, has improved the stability of circuit operation, very big reduction cost.

Claims

1. A contactless gravity switch characterized by: the pendulum bob type vibration damping device comprises a support (3), a pendulum bob (1), a left proximity switch (7) and a right proximity switch (8), wherein a bearing (4) is fixed at the upper end of the support (3), the other end of a pin bolt (5) penetrating through the bearing (4) penetrates through a mounting hole at the upper end of the pendulum bob (1), the pendulum bob (1) and the pin bolt (5) are fastened together by a fastening nut (2), and the left proximity switch (7) and the right proximity switch (8) positioned at the left side and the right side of the lower end of the pendulum bob (1) are mounted at the lower part of the support (3);

the pendulum bob type touch screen is characterized by further comprising a control circuit board, an indicator light I, an indicator light II and an indicator light III, wherein the control circuit board is used for judging whether the pendulum bob (1) tilts or not according to output signals of the left proximity switch (7) and the right proximity switch (8), the indicator light I is used for indicating that the pendulum bob (1) does not tilt, the indicator light II is used for indicating that the pendulum bob (1) tilts leftwards and the indicator light III is used for indicating that the pendulum bob tilts rightwards, the left proximity switch (7) and the right proximity switch (8) are connected with the input end of the control circuit board, and the indicator light I, the indicator light.

2. The contactless gravity switch according to claim 1, characterized in that: the control circuit board comprises a decoder, wherein the input end B of the decoder is connected with a second upper pull resistor R2 and a right proximity switch K2, the input end A of the decoder is connected with a first upper pull resistor R1 and a left proximity switch K1, the input end C of the decoder and the input end D of the decoder are grounded, and the output end of the decoder is connected with a first indicator lamp, a second indicator lamp and a third indicator lamp through an output driving circuit.

3. The contactless gravity switch according to claim 2, characterized in that: the decoder is a CD 4515.

4. The contactless gravity switch according to claim 1, characterized in that: the first indicator light is located in the middle, the second indicator light is located on the left side of the first indicator light, and the third indicator light is located on the right side of the first indicator light.

5. The contactless gravity switch according to claim 1, characterized in that: the first indicator light is a green light, and the second indicator light and the third indicator light are red lights.

6. The contactless gravity switch according to claim 1, characterized in that: the box body is further included, the support (3) is arranged outside the left side of the box body, the first indicator lamp, the second indicator lamp and the third indicator lamp are arranged on the box body, and the control circuit board is arranged in the box body through the support (13).

7. The contactless gravity switch according to claim 4, wherein: the control circuit board is connected with an aviation socket (11).