CN202754655U

CN202754655U - Falling detector

Info

Publication number: CN202754655U
Application number: CN 201220494418
Authority: CN
Inventors: 吴攀; 洪浩; 王伟峰
Original assignee: SHANGHAI WEIPINLAI MECHATRONICS TECHNOLOGY CO LTD
Current assignee: SHANGHAI WEIPINLAI MECHATRONICS TECHNOLOGY CO LTD
Priority date: 2012-09-25
Filing date: 2012-09-25
Publication date: 2013-02-27
Anticipated expiration: 2022-09-25

Abstract

The utility model discloses a falling detector which comprises an acceleration sensor, a low pass filter, a high pass filter, a number one comparator, an integrator, a number two comparator and a self-holding relay, wherein an output end of the acceleration sensor is connected with an input end of the low pass filter, the output end of the low pass filter is connected with the input end of the high pass filter, one output of the high pass filter is connected with the integrator through the number one comparator, the other output of the high pass filter is directly connected with the integrator, the output end of the integrator is connected with the input end of the number two comparator, the output end of the number two comparator is connected with the input end of the self-holding relay, and an integrator switch is connected between the number one comparator and the integrator in series. The falling detector uses the acceleration principle to replace the complex mechanical principle, and achieves the demand of being simple in structure of the falling detector, small in volume, low in cost and convenient to install. The falling detector can be used for detecting uncontrolled falling of lifting equipment, such as elevators, and possesses popularization and practical applicability.

Description

A kind of fall detection device

Technical field

The utility model relates to a kind of fall detection device, relates in particular to a kind of fall detection device for jacking equipment generation car situations of falling out of control such as monitoring elevators.

Background technology

The lifter apparatus such as elevator relate to the personal safety problem, when control system is out of control when falling, requires to have and overlap independently that detector can in time detect and immediately braking.In the prior art, common solution is to adopt mechanical velocity limiter,, drives the governor sheave rotation by the steel wire that is attached thereto when car is walked that is, and when speed was higher than threshold values, the centrifuge arm touching safety switch on the pulley provided the signal that falls.The method of the mechanical velocity limiter of this employing needs the mechanical mechanisms such as steel wire, pulley, centrifuge arm, spring, and steel wire length is proportional to story height, needs consumable material more, also exists simultaneously numerous and diverse problem is installed, and causes the problems such as cost is high, construction is difficult.

The utility model content

For the problems referred to above that prior art exists, the purpose of this utility model provide a kind of simple in structure, cost is low, easy installation, can be used for monitoring the fall detection device of the jacking equipment generation car situation of falling out of control such as elevator.

For realizing above-mentioned utility model purpose, the technical scheme that the utility model is taked is as follows:

A kind of fall detection device, comprise acceleration pick-up, the low-pass filter of filtering radio-frequency component, filtering direct current and temperature are floated the high-pass filter of signal, a comparator, integrator, the latch-in relay of No. two comparators and locking faulty condition, the mouth of described acceleration pick-up links to each other with the input end of low-pass filter, the mouth of low-pass filter links to each other with the input end of high-pass filter, one tunnel output of high-pass filter links to each other with integrator by a comparator, another road output directly links to each other with integrator, the mouth of integrator links to each other with the input end of No. two comparators, the mouth of No. two comparators links to each other with the input end of latch-in relay, is serially connected with an integrator switch between a described comparator sum-product intergrator.

As a kind of optimal way, between low-pass filter and high-pass filter, be serially connected with voltage amplifier No. one, behind high-pass filter, be serially connected with voltage amplifier No. two.

As further preferred version, the setting threshold values of a comparator is 0.1～1.0V, and the setting threshold values of No. two comparators is 5～10V.

The effect of the part components and parts in the utility model is as follows:

High-pass filter: the temperature that solves the acceleration transducer signals that transmits is floated problem;

Integrator switch: solve the false triggering problem that causes owing to small-signal;

Latch-in relay: locking faulty condition;

Integrator: be used for computation speed.

Compared with prior art, the fall detection device that the utility model provides replaces complicated theory of machines with the acceleration/accel principle, simple in structure, the requirements such as volume is little, cost is low, easy installation of fall detection device have been realized, can be used for the monitoring of the car generation situation of falling out of control of the jacking equipments such as elevator, have universal practicality.

Description of drawings

Fig. 1 is the structured flowchart of a kind of fall detection device of providing of embodiment 1;

Fig. 2 is the structured flowchart of a kind of fall detection device of providing of embodiment 2.

Among the figure: 1, acceleration pick-up; 2, low-pass filter; 3, high-pass filter; 4, comparator; 5, integrator switch; 6, integrator; 7, No. two comparators; 8, latch-in relay; 9, voltage amplifier; 10, No. two voltage amplifiers.

The specific embodiment

Below in conjunction with drawings and Examples the utility model is illustrated in further detail:

Embodiment 1

As shown in Figure 1, a kind of fall detection device that present embodiment provides comprises the latch-in relay 8 of the low-pass filter 2, filtering direct current of acceleration pick-up 1, filtering radio-frequency component and high-pass filter 3 that temperature is floated signal, comparator 4, integrator switch 5, integrator 6, No. two comparators 7 and locking faulty condition; The mouth of described acceleration pick-up 1 links to each other with the input end of low-pass filter 2, the mouth of low-pass filter 2 links to each other with the input end of high-pass filter 3, one tunnel output of high-pass filter 3 links to each other with integrator 6 by a comparator 4, another road output directly links to each other with integrator 6, the mouth of integrator 6 links to each other with the input end of No. two comparators 7, the mouth of No. two comparators 7 links to each other with the input end of latch-in relay 8, is serially connected with an integrator switch 5 between a described comparator 4 sum-product intergrators 6.

The working process of the described fall detection device of present embodiment is as follows:

Behind the output signal process low-pass filter 2 filtering radio-frequency components of acceleration pick-up 1, float signal by high-pass filter 3 filtering direct currents and temperature again, obtain reacting the purified signal of acceleration/accel; This purified signal enters comparator 4 sum-product intergrators 6 No. one, when comparator 4 relatively draws described purified signal less than the setting threshold values of a comparator, integrator 6 is not worked, when comparator 4 relatively drew described purified signal greater than the setting threshold values of a comparator, integrator 6 began signal is carried out integration; The output voltage of integrator 6 through No. two comparators 7 relatively, when the output voltage of integrator 6 during greater than the setting threshold values of No. two comparators, latch-in relay 8 work, output fall detection signal; After latch-in relay 8 is triggered, be in the fault hold mode, need hand-reset.

Embodiment 2

As shown in Figure 2, a kind of fall detection device that present embodiment provides and the difference of embodiment 1 only are: be serially connected with No. one voltage amplifier 9 between low-pass filter 2 and high-pass filter 3, be serially connected with voltage amplifier 10 No. two behind high-pass filter 3; All the other contents are all with identical described in the embodiment 1.

Behind the output signal process low-pass filter 2 filtering radio-frequency components of acceleration pick-up 1, after a voltage amplifier 9 amplifies, float signal by high-pass filter 3 filtering direct currents and temperature again, obtain reacting the purified signal of acceleration/accel; This purified signal is amplified into comparator 4 sum-product intergrators 6 No. one through No. two voltage amplifiers 10, when comparator 4 relatively draws described purified signal less than the setting threshold values of a comparator, integrator is not worked, when comparator relatively drew described purified signal greater than the setting threshold values of a comparator, integrator 6 began signal is carried out integration; The output voltage of integrator 6 through No. two comparators 7 relatively, when the output voltage of integrator 6 during greater than the setting threshold values of No. two comparators 7, latch-in relay 8 work, output fall detection signal.

In addition, of particular note, a comparator setting threshold values and No. two comparators are set threshold values and all can be set according to actual condition of service; As further preferred version, the setting threshold values of a comparator is 0.1～1.0V, and the setting threshold values of No. two comparators is 5～10V.

Be necessary at last in this explanation to be: foregoing only is used for the technical solution of the utility model is described in further detail; can not be interpreted as the restriction to the utility model protection domain, some nonessential improvement and adjustment that those skilled in the art makes according to foregoing of the present utility model all belong to protection domain of the present utility model.

Claims

1. fall detection device, it is characterized in that: comprise acceleration pick-up, the low-pass filter of filtering radio-frequency component, filtering direct current and temperature are floated the high-pass filter of signal, a comparator, integrator, the latch-in relay of No. two comparators and locking faulty condition, the mouth of described acceleration pick-up links to each other with the input end of low-pass filter, the mouth of low-pass filter links to each other with the input end of high-pass filter, one tunnel output of high-pass filter links to each other with integrator by a comparator, another road output directly links to each other with integrator, the mouth of integrator links to each other with the input end of No. two comparators, the mouth of No. two comparators links to each other with the input end of latch-in relay, is serially connected with an integrator switch between a described comparator sum-product intergrator.

2. fall detection device according to claim 1 is characterized in that: be serially connected with voltage amplifier No. one between low-pass filter and high-pass filter, be serially connected with voltage amplifier No. two behind high-pass filter.

3. fall detection device according to claim 1 and 2, it is characterized in that: the setting threshold values of a comparator is 0.1～1.0V, the setting threshold values of No. two comparators is 5～10V.