The latest patent application model
The invention relates to a device for testing the cutting resistance of rope products, especially for testing the cutting resistance of fiber rope products.
At present, people pay more attention to its strength, elongation at break, impact performance and other properties of rope belt products, and pay less attention to the friction resistance and other properties of rope belt products. Internationally, only UIAA (international mountaineering federation) has introduced the test of friction resistance of mountaineering rope, and there are corresponding testing instruments.
At present, the construction of public electric test pen is composed of test contact, current limiting resistance, neon tube, metal spring and hand electrode in series. When the test contact is in contact with the object to be measured, and the hand touches the electric pole, when the object to be measured has a higher voltage relative to the earth, the neon tube ignites, indicating that the object to be measured is electrified.
However, the metal shell of many electrical appliances does not carry a dangerous shock voltage to the human body, but only represents the distributed capacitance and/or normal resistance induction to produce the electric potential that makes the neon tube glow. Generally, the test pen can not distinguish the dangerous shock voltage and the non-dangerous induction potential, which makes it difficult to detect leakage and easy to make wrong judgment.
[technical background: refers to the understanding of the invention, retrieving, review the useful technology, can reflect these background technologies cited files. Technical background is the closest to the existing technology, it is the basis of the new technical solutions to practical technology. In addition, but also objectively points out the problems existing in the technical background and shortcomings, citation of documents, information, should be its provenance.]
Invention patent content:
[invention content: shall include the technical problem to be solved by the invention, the technical solution adopted to solve the technical problem and its beneficial effects.]
In order to overcome the deficiency of the existing electric test pen which cannot distinguish the dangerous shock voltage and the non-dangerous induced potential, the invention provides an electric test pen which can not only detect whether the measured object is electrified, but also conveniently distinguish the dangerous shock voltage and the non-dangerous induced potential.
[the technical problem to be solved refers to the technical problem existing in the existing technology to be solved, and the technical problem to be solved by the invention shall be specified in a concise and accurate language in view of the defects or deficiencies of the existing technology, and the technical effect may also be further explained, but advertising language shall not be used.]
The invention patent solve the problem of its technology adopted by the technical scheme is: in the insulation shell, testing contact, current limiting resistor, neon and hand electric shock arc connection, setting a shunt resistance branch, make the test contact with a shunt resistance electric connection at one end, shunt resistance at the other end contact with a human can identify electrode electrical connection.
When the human hand contacts the identification electrode and the hand electrode, make the shunt resistance in parallel. When testing the contact, current limiting resistance, neon tube and the hand electrode circuit, the human hand only contacts the hand electrode, and the neon tube ignites, indicating that the measured object is electrified.
When people contact hand electric shock polar and identify electrode at the same time, if it be tested with the no dangerous high electric potential, the potential source internal resistance being very high, which greatly reduces the measured content of charged potential, the neon glow, not if objects with dangerous electric shock voltage being measured, because of the small internal resistance, access to the analyte shunt resistance is hardly to reduce electric potential, the neon glow, achieve the goal of safety to the difference between the voltage.
Technical solution: the collection of technical measures taken by the applicant for the technical problems to be solved. Technical measures are usually represented by technical characteristics. The technical scheme shall clearly and completely explain the shape and structural characteristics of the invention, explain how the technical scheme solves technical problems and, when necessary, explain the scientific principles on which the technical scheme is based.
When writing technical proposals, mechanical products should describe the necessary parts and their overall structural relationships; For products involving circuits, the connection relationship of circuits shall be described; The combination relationship between the circuit and the mechanical part shall also be indicated for the electromechanical products; In the case of an application involving distribution parameters, the mutual positional relationship of components shall be indicated; When integrated circuits are involved, the model and function of the integrated circuit shall be clearly disclosed. The structural characteristics of the "electric test pen" in this example include the connection relationship between mechanical structure and circuit. Therefore, the relationship between main mechanical parts and their overall structure and the connection relationship of circuit should be indicated. The technical solution cannot only describe the principle, action and the name, function or use of each part.
The beneficial effect of the invention is that the safety voltage can be divided conveniently while the tested object is electrified, and only resistance elements are used in the shunt branch, with simple structure.
[beneficial effect: it is the advantage and positive effect of invention compared with existing technology, which is directly brought by technical characteristics, or the inevitable technical effect produced by technical characteristics.]