DE102014219827A1 - protection circuit - Google Patents

Abstract

Protective circuit comprising at least one sensor and at least one signal generator, wherein the at least one sensor detects at least one physical and / or chemical ambient condition of the protection circuit and is controlled in dependence of the detected ambient condition of the at least one signal generator.

Description

The invention is based on a protection circuit, wherein a signal generator is activated as a function of an environmental condition detected by a sensor.

State of the art

From the CN 101204253 A is a protective circuit for protective gloves with electrical measuring points known.

The CN 202774279 U discloses a warning device for protective gloves with measuring points for detecting, for example, a temperature.

The CN 202738876 U discloses a protection circuit with measuring points and a voltage measuring device.

Disclosure of the invention

A disadvantage of the known state of the art is that the known protective circuits measure temperatures, voltages and currents, but do not detect any ambient chemical conditions.

Advantages of the invention

The procedure according to the invention with the characterizing features of the independent claims, on the other hand, has the advantage that a protection circuit comprises at least one sensor and at least one signal generator, wherein the at least one sensor detects at least one physical and / or chemical ambient condition of the protection circuit and depending on the detected environmental condition activates the at least one signal generator.

Further advantageous embodiments of the present invention are the subject of the dependent claims.

To detect the physical and / or chemical ambient conditions, the at least one sensor comprises an electrical contact, a voltage sensor, a current sensor, a pressure sensor, a temperature sensor, a chemical sensor and / or an electrochemical sensor. By means of the chemical and / or electrochemical sensor advantageously a gas concentration (eg, lithium gas concentration) is measured, which is emitted for example by a lithium-ion cell, for example in a thermal run through the lithium-ion cell, which exceeds a limit value for a human is harmful to health.

Advantageously, the protection circuit comprises an evaluation unit which, for example, compares the detected physical and / or chemical ambient conditions with limit values and, when exceeding predefinable limit values, activates the at least one signal generator. The evaluation unit can further store the detected environmental conditions in a non-volatile memory for later evaluation. The evaluation unit is realized, for example, by an ASIC or comprises a programmable microcontroller which, for example, transmits the detected environmental conditions to a smartphone via a radio module, in order, for example, to place an emergency call with information about the detected environmental conditions.

The protection circuit comprises at least one fuse, an electromechanical switch, an electronic switch (for example, semiconductor switches such as field-effect transistors, bipolar transistors or diodes) and / or an electrical switch, which advantageously separates an electrically conductive connection. If a current flow exceeds a limit value, the fuse melts and the electrically conductive connection is irreversibly disconnected, or the evaluation unit controls the electrical and / or electromechanical switch, as a result of which the electrically conductive connection is reversibly or irreversibly disconnected.

The protection circuit, in particular the evaluation unit, comprises an electrical energy store for supplying power to the protection circuit, whereby an operation of the sensors, the signal generator and / or the evaluation unit that is independent of external energy supplies is achieved. The electrical energy storage is, for example, interchangeable, wired and / or wireless rechargeable.

Advantageously, the signal generator generates an optical, acoustic and / or haptic signal, whereby people are warned of an abnormal environmental condition of the protection circuit, in which, for example, health damage to people can be expected.

To check the operability of the at least one sensor, an electrical voltage is applied to the sensor by means of the electrical energy store, whereby the signal generator generates a signal and / or the evaluation unit carries out a calibration of the sensor. As a result, aging processes of the sensor are advantageously detected and deviations are taken into account in an evaluation by the evaluation unit, whereby, for example, false alarms are reduced.

Advantageously, the protective circuit according to the invention is used in a protective device, in particular a protective glove.

To produce at least one protective glove with the protective circuit according to the invention, at least one sensor and / or one electrical contact is at least partially mechanically connected to a surface of the protective glove and / or at least partially incorporated into a material of the protective glove.

Electrically conductive connections between the at least one protective glove and an evaluation unit are advantageously carried out by means of ribbon cables, whereby required space and weight is saved.

In a further embodiment, the protective glove comprises further sensors, which continuously record, for example, vital functions such as a pulse of a wearer of the protective glove, wherein the sensors and / or the evaluation unit transmit the recorded vital functions via cable and / or wirelessly to a receiver, for example to an emergency control center of rescue workers and / or a smartphone.

Brief description of the figures

Embodiments of the invention are illustrated in the drawings and explained in more detail in the following description.

It shows:

1 an embodiment of the protection circuit according to the invention; and

2 a use of the protection circuit according to the invention; and

Detailed description of the embodiments

The same reference numerals denote the same device components in all figures.

1 shows an embodiment of the protection circuit according to the invention 1 , The protection circuit 1 includes in the embodiment shown a first sensor 2 For example, an electrochemical sensor for detecting gas concentrations, two electrically conductive contacts 3 (1) . 3 (2) , an evaluation unit 4 For example, a programmable circuit and / or a microcontroller, a signal generator 5 , For example, an optical, acoustic and / or haptic signal generator, and a fuse 6 , which in an electrically conductive connection 7 between the electrical contact 3 (2) and the evaluation unit 4 is arranged.

The electrochemical sensor 2 detects an environmental condition of the protection circuit 1 , For example, a gas concentration. Depending on the detected environmental condition, the evaluation unit controls 4 the signal generator 5 for example, if a lithium gas concentration is above a predefinable threshold. In this case, the protection circuit is operated in an abnormal environmental condition in which, for example, human health effects are expected.

The signal generator displays optically, acoustically and / or haptically the abnormal operating state, for example by means of a warning lamp, a whistling sound and / or vibration. Are people in the vicinity of the protection circuit 1 , they may take appropriate action, such as wearing respiratory masks and / or using electrically insulated tools.

2 shows a possible use of the protection circuit according to the invention 1 in a pair of protective gloves 8 (1) . 8 (2) , The protection circuit 1 includes electrically conductive contacts 3 (1) . 3 (2) . 3 (3) . 3 (4) , chemical and / or electrochemical sensors 2 (1) . 2 (2) , Signal generator 5 (1) . 5 (2) and an evaluation unit 4 with an electrical energy storage 10 ,

A top of the protective glove 8 (1) includes a first chemical sensor 2 (1) at least partially with a surface of the protective glove 8 (1) is mechanically connected, for example glued, sewn and / or printed.

A bottom of the protective glove 8 (2) includes a second chemical sensor 2 (2) at least partially in a material of the protective glove 8 (2) is incorporated, for example by interweaving, gluing and / or arranged between two layers of the material.

The chemical sensors 8 (1) . 8 (2) capture the same chemical environmental conditions, resulting in failure of a chemical sensor 8 (1) . 8 (2) at least through the other chemical sensor 8 (1) . 8 (2) an environmental condition is detected, and / or different chemical environmental conditions.

The electrically conductive contacts 3 (1) . 3 (2) . 3 (3) . 3 (4) are for example by means of electrically conductive connections 12 (2) . 12 (3) with the evaluation unit, with further electrically conductive contacts 3 (1) . 3 (2) . 3 (3) . 3 (4) and / or with the signalers 5 (1) . 5 (2) connected.

A bottom of the protective glove 8 (2) includes the electrically conductive contacts 3 (2) . 3 (3) at least partially with a surface of the protective glove 8 (2) are mechanically connected, for example by interweaving, gluing, imprinting and / or vapor deposition.

A bottom of the protective glove 8 (1) includes the electrically conductive contacts 3 (1) at least partially with a surface of the protective glove 8 (1) is mechanically connected, for example by interweaving, gluing, imprinting and / or vapor deposition.

The underside of the protective glove 8 (1) includes the electrically conductive contact 3 (4) , which is designed for example as a metallic braid and at least partially in a material of the protective glove 8 (1) is incorporated.

The electrically conductive contacts 3 (1) . 3 (2) . 3 (3) . 3 (4) comprise an electrically conductive material, for example copper, gold, aluminum and / or alloys.

The evaluation unit 4 controls by means of electrical conductive connections 12 (1) at least one signal generator 5 (1) . 5 (2) on, for example, when a current between two electrically conductive contacts 3 (1) . 3 (2) . 3 (3) . 3 (4) flows.

In a further embodiment, a signal of the signal generator 5 (2) by a current flow through the electrically conductive connection 12 (3) between the electrically conductive contacts 3 (2) . 3 (3) triggered. As a result, for example, a voltage test by means of the electrical conductive contacts 3 (2) . 3 (3) between two fingers possible, for example when the evaluation 4 not yet about the mechanical contact 9 (2) connected.

By means of an electrically conductive connection 12 (4) controls the evaluation unit 4 an electrical and / or electromechanical switch 11 for separating the electrically conductive connection 12 (2) ,

An energy supply of the chemical sensors 2 (1) . 2 (2) done by the electrical energy storage 10 the evaluation unit 4 , In another embodiment, the chemical sensors include 2 (1) . 2 (2) additional electrical energy storage.

By means of the electric energy storage 10 the evaluation unit 4 is used to check the functionality of the chemical sensor 2 (1) . 2 (2) applied an electrical voltage, whereby, for example, the signal generator 5 (1) must trigger a signal. In another embodiment, the evaluation unit calibrates 4 the chemical sensor 2 (1) . 2 (2) For example, by measuring the flow of current through the chemical sensor 2 (1) . 2 (2) ,

In the embodiment shown, the electrically conductive connection comprises 12 (2) between the electrically conductive contacts 3 (1) . 3 (2) a fuse 6 , which melts when exceeding a maximum current, causing the electrical connection 12 (2) is disconnected.

Advantageously, the electrically conductive connections 12 (1) . 12 (2) . 12 (3) . 12 (4) executed by ribbon cables, the electrically conductive connections 12 (1) . 12 (2) mechanically detachable contact points 9 (1) . 9 (2) include, for example, connectors, whereby a rapid separation of the electrically conductive connections is possible and / or a putting on or taking off the protective gloves, for example by a rescue force, is facilitated.

The material of the protective gloves includes, for example, an electrical and / or thermal insulator, which, for example, false alarms are prevented by leakage currents and / or damage caused by high temperatures are prevented.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• CN 101204253 A [0002]
• CN 202774279 U [0003]
• CN 202738876 U [0004]

Claims (10)

Protection circuit comprising at least one sensor and at least one signal generator, characterized in that the at least one sensor detects at least one physical and / or chemical ambient condition of the protection circuit and is controlled in dependence of the detected ambient condition of the at least one signal generator. Protection circuit according to claim 1, characterized in that the at least one sensor is an electrical contact, a voltage sensor, a current sensor, a pressure sensor, a temperature sensor, a chemical sensor and / or an electrochemical sensor. Protection circuit according to one of the preceding claims, characterized in that the protection circuit comprises an evaluation unit. Protection circuit according to one of the preceding claims, characterized in that the protection circuit comprises at least one fuse, an electromechanical switch and / or an electrical switch for disconnecting an electrically conductive connection. Protection circuit according to one of the preceding claims, characterized in that the protection circuit comprises an electrical energy storage for the power supply of the protection circuit. Protection circuit according to one of the preceding claims, characterized in that the signal generator generates an optical, acoustic and / or haptic signal. Protection circuit according to one of the preceding claims, characterized in that for checking a functionality of the at least one sensor by means of the electrical energy storage, an electrical voltage is applied to the sensor, whereby the signal generator generates a signal and / or the evaluation unit performs a calibration of the sensor. Use of the protective circuit according to one of claims 1 to 7 in a protective device, in particular a protective glove. A method for producing at least one protective glove according to claim 8, characterized in that at least one sensor and / or an electrical contact are at least partially mechanically connected to a surface of the protective glove and / or at least partially incorporated into a material of the protective glove. Method for producing at least one protective glove according to claim 9, characterized in that electrically conductive connections between the at least one protective glove and an evaluation unit are made by means of ribbon cables.

Images