Megameter
By integrating a voltage detection device and an alarm into the megohmmeter, the problem of the megohmmeter's inability to detect whether the measured object is charged in a timely manner is solved, ensuring operator safety, simplifying the operation process, and improving measurement safety.
Patent Information
- Application Number
- CN202423015928.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2034-12-06
AI Technical Summary
Existing megohmmeters cannot detect whether the object being measured is charged in a timely manner when measuring insulation resistance, which poses a safety hazard.
Design a megohmmeter that integrates a voltage detection device and an alarm. The voltage detection device detects whether the object being tested is energized, and an alarm is triggered when energization is detected to prevent further insulation resistance measurement and improve safety.
This allows for the detection of whether the device is energized before measuring insulation resistance, thus preventing safety accidents and improving the safety of operators and the measurement process.
Smart Images
Figure CN223883656U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of measuring devices, in particular to a megohmmeter. BACKGROUND
[0002] The megohmmeter is a commonly used measuring instrument for electricians, which is mainly used to check the insulation resistance of electrical equipment, household appliances or electrical lines to the ground and between phases, so as to ensure that the equipment, appliances and lines work in a normal state and avoid accidents such as electric shock injury and equipment damage.
[0003] In the related art, the megohmmeter is connected with a pen through a wire. When measuring insulation, the operator needs to hold the pen to measure the measured object. However, if the measured object is suddenly electrified during the measurement, the operator is difficult to find in time, which may cause safety accidents of the operator. Therefore, how to improve the safety of the megohmmeter is a technical problem to be solved at present. CONTENT OF THE UTILITY MODEL
[0004] In view of the above problems, the application is proposed to provide a megohmmeter which can detect whether the measured object is electrified through an electricity testing device and detect the insulation resistance of the measured object through the megohmmeter main body. When the operator detects that the measured object is electrified, the operator can no longer continue to detect the insulation resistance, which improves the safety of the measurement and protects the personal safety of the operator.
[0005] The application provides a megohmmeter, which comprises a megohmmeter main body, an electricity testing device, a wire and a pen, the megohmmeter main body is connected with the pen through the wire, and the electricity testing device is connected with the pen.
[0006] Optionally, the electricity testing device comprises a voltage sensor, and the voltage sensor is connected with the pen.
[0007] Optionally, the electricity testing device further comprises an alarm, and the voltage sensor is connected with the alarm.
[0008] Optionally, the alarm module comprises a light alarm, and the light alarm is connected with the voltage sensor.
[0009] Optionally, the alarm module comprises a sound alarm, and the sound alarm is connected with the voltage sensor.
[0010] Optionally, the electricity testing device comprises a display screen.
[0011] Optionally, the electricity testing device comprises a plurality of voltage measurement gears.
[0012] Optionally, the electricity testing device is arranged on the pen.
[0013] Optionally, the megohmmeter further comprises a relay, a power supply end of the relay is connected with the pointer, and normally closed contacts of the relay are connected in series between the megohmmeter body and the pointer.
[0014] Optionally, the relay is arranged in the megohmmeter body.
[0015] The technical scheme provided in the embodiments of the present application has at least the following technical effects or advantages:
[0016] The megohmmeter provided by the embodiments of the present application comprises a megohmmeter body, an electricity testing device, a wire and a pointer, the megohmmeter body is connected with the pointer through the wire, and the electricity testing device is connected with the pointer. The electricity testing device can be used to detect whether the measured object is electrified, and the megohmmeter body can be used to detect the insulation resistance of the measured object. When the measured object is detected to be electrified, the operator can stop the detection of the insulation resistance, thereby improving the safety of measurement and protecting the personal safety of the operator.
[0017] The above description is only a summary of the technical scheme of the present application. In order to make the technical means of the present application more clearly understood and implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS
[0018] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the present application. Furthermore, the same reference numerals are used throughout the several drawings to designate the same or similar parts. In the drawings:
[0019] Figure 1 is a structural schematic diagram of a megohmmeter provided by the embodiments of the present application;
[0020] Figure 2 is a layout schematic diagram of an electricity testing device provided by the embodiments of the present application. DETAILED DESCRIPTION
[0021] In order to make the purposes, technical schemes and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the drawings.
[0022] Various structural diagrams according to embodiments of the present disclosure are shown in the accompanying drawings. These diagrams are not drawn to scale, in which certain details are shown in a somewhat exaggerated manner for purposes of clarity and understanding, and certain other details are omitted. The shapes of various regions, layers, and the relative sizes and positional relationships among them shown in the drawings are merely exemplary, and may, in actuality, deviate due to manufacturing tolerances or technical limitations, and regions / layers with different shapes, sizes, and relative positions can be additionally designed according to actual needs by those skilled in the art.
[0023] In the context of the present disclosure, when a layer / element is referred to as being located "on" another layer / element, the layer / element can be directly on the other layer / element, or there can be an intervening layer / element therebetween. In addition, if a layer / element is located "on" another layer / element in one orientation, it can be located "under" the other layer / element when the orientation is reversed. In the context of the present disclosure, similar or identical components can be denoted by the same or similar reference numerals.
[0024] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with specific embodiments. It should be understood that the embodiments of the present disclosure and the specific features in the embodiments are detailed descriptions of the technical solutions of the present application, and not limitations of the technical solutions of the present application. In the case of no conflict, the technical features in the embodiments of the present application and the embodiments can be combined with each other.
[0025] Figure 1 is a structural diagram of a megohmmeter provided by an embodiment of the present application, as shown in Figure 1 The megohmmeter includes a megohmmeter body 1, an electricity testing device 2, a lead wire 3, and a pointer 4. The megohmmeter body 1 is connected with the pointer 4 through the lead wire 3, and the electricity testing device 2 is connected with the pointer 4.
[0026] Among them, the megohmmeter body 1 is used for measuring the insulation resistance of the measured object; the electricity testing device 2 is used for measuring the voltage of the measured object.
[0027] In the present embodiment, the megohmmeter body 1 includes two terminals, namely a measurement terminal and a grounding terminal, which can be respectively connected with the corresponding pointer 4 through the lead wire 3. When it is necessary to measure the insulation resistance of the measured object, the pointer 4 connected with the electricity testing device 2 can be first connected with the measured object to detect whether the measured object is electrified. If it is detected that the measured object is not electrified, it indicates that the insulation resistance measurement can be performed, and then the pointer 4 connected with the grounding terminal is grounded, and the pointer 4 connected with the measurement terminal is connected with the measured object to measure the insulation resistance of the measured object. If it is detected that the measured object is electrified, it indicates that the insulation resistance measurement cannot be performed, so as to avoid safety accidents.
[0028] The existing megohmmeter can only measure the insulation resistance of the measured object, and cannot detect whether the measured object is electrified. When performing insulation testing, the operator needs to use other equipment to first perform electrification detection on the measured device to ensure safety. However, this operation procedure is cumbersome and has a safety hazard caused by human negligence. The megohmmeter in the present application can detect whether the measured object is electrified and can also detect the insulation resistance of the measured object. When it is detected that the measured object is electrified, the insulation resistance detection can be stopped, the safety of measurement is improved, the personal safety of the operator is ensured, the electrification detection operation procedure is simplified, and the work efficiency is improved.
[0029] Optionally, the electrification detection device 2 comprises a voltage sensor, and the voltage sensor is connected with the pointer.
[0030] In the embodiment, the voltage sensor is used to measure the voltage of the measured object. In order to ensure the accuracy of measurement, a high-sensitivity voltage sensor can be used.
[0031] Optionally, the electrification detection device 2 further comprises an alarm, and the voltage sensor is connected with the alarm.
[0032] The alarm is used to send an alarm signal.
[0033] In the embodiment, if the voltage sensor detects that the measured object is electrified, the voltage sensor generates a voltage signal and sends the voltage signal to the alarm. If the alarm receives the voltage signal sent by the voltage sensor, the alarm will alarm.
[0034] In the embodiment, the electrification detection device can further comprise a signal processing module, which is connected with the alarm and the voltage sensor respectively. The voltage sensor sends the voltage signal to the signal processing module, and the signal processing module processes and analyzes the received voltage signal. If it is analyzed that the voltage of the measured object is greater than a preset voltage threshold, the signal processing module sends an alarm signal to the alarm. If the alarm receives the alarm signal sent by the voltage sensor, the alarm will alarm. If the voltage of the measured object is less than or equal to the voltage threshold, the signal processing module does not send an alarm signal to the alarm.
[0035] It can be understood that the megohmmeter has an electrification alarm function, that is, when it is detected that the measured object is electrified, the alarm is performed to remind the operator that the measured object is electrified, and the safety of operation is improved.
[0036] Optionally, the alarm module comprises a light alarm, and the light alarm is connected with the voltage sensor.
[0037] In the embodiment, the light alarm can be reminded by the light alarm, and the specific alarm mode can be set according to the actual situation. For example, when the light of the light alarm is on or flashes, it indicates that the measured object is electrified; or when the measured object is electrified, a certain color of the alarm light is on, and when the measured object is not electrified, another color of the alarm light is on.
[0038] Optionally, the alarm module comprises a sound alarm, and the sound alarm is connected with the voltage sensor.
[0039] In the embodiment, the alarm can also be performed by the sound alarm. For example, the alarm is performed by using a buzzer, and when it is detected that the measured object is electrified, the buzzer is controlled to sound. The sounding frequency of the buzzer can also be determined according to the voltage of the measured object, and the greater the voltage, the higher the frequency.
[0040] Optionally, the electrostatic testing device 2 comprises a display screen for displaying the measured voltage.
[0041] In the embodiment, the display screen can also be arranged on the panel of the electrostatic testing device 2, and the measured voltage is displayed through the display screen, so that the measurement result can be more intuitively displayed.
[0042] Optionally, the electrostatic testing device 2 comprises a plurality of voltage measurement gears.
[0043] In the embodiment, when the measured objects of different voltage levels are tested, different voltage measurement gears can be selected, so that the measurement process is safer and more accurate. For example, when the measured objects of 220V, 10kV and 35kV are tested, the corresponding voltage measurement gears are selected before measurement.
[0044] Figure 2 is a schematic view of an electrostatic testing device provided by the embodiment of the application, as shown in Figure 2 The electrostatic testing device is arranged on the watch hands 4.
[0045] In the embodiment, the electrostatic testing device can be directly connected with the watch hands 4, and the measured object can be more conveniently tested.
[0046] Optionally, the megohmmeter further comprises a relay, a power supply end of the relay is connected with the watch hands, and a normally closed contact of the relay is connected in series between the main body of the megohmmeter and the watch hands.
[0047] In the embodiment, the power supply end of the relay is connected with the probe, when the probe is connected with the measured object, if the measured object is electrified, the relay is electrified; if the measured object is not electrified, the relay is not electrified. The normally closed contact of the relay can be connected with the megohmmeter body 1 and one end of the wire 3 respectively, and the other end of the wire 3 is connected with the probe 4; or the normally closed contact of the relay is connected with one end of the wire 3 and the probe 4 respectively, and the other end of the wire 3 is connected with the megohmmeter body 1. When the measured object is not electrified, the relay is not electrified, the normally closed contact is always closed, and the megohmmeter body can measure the insulation resistance; when the measured object is electrified, the relay is electrified, the normally closed contact is opened, the megohmmeter body is disconnected with the measured object, and the insulation resistance cannot be measured.
[0048] That is, when the measured object is electrified, the connection between the megohmmeter body 1 and the probe 4 can be disconnected by the relay, so that the megohmmeter body 1 cannot measure the insulation resistance, thereby ensuring the safety of the operator.
[0049] In the embodiment, when the voltage of the measured object is small and does not cause harm to people, the relay can not disconnect the normally closed contact due to the small voltage, and the megohmmeter body 1 and the probe 4 are still connected and can continue to measure the insulation resistance. When the voltage of the measured object is large, the megohmmeter body 1 and the probe 4 are disconnected. The whole detection process of the megohmmeter in the application is very automatic and has higher safety.
[0050] It should be noted that the ground end of the electricity testing device and the ground end of the relay can be connected together with the ground end of the megohmmeter body, and during the measurement, it can be ensured that all ground ends are grounded.
[0051] Optionally, the relay is arranged in the megohmmeter body.
[0052] In the embodiment, the relay can be arranged on the probe together with the electricity testing device, but this makes the probe larger in size and the measurement becomes inconvenient. Therefore, the relay can be arranged in the megohmmeter body and integrated with the megohmmeter body, so that the megohmmeter becomes more convenient to use and carry.
[0053] The technical solutions in the embodiments of the application have at least the following technical effects or advantages:
[0054] The megohmmeter provided by the embodiment of the application comprises a megohmmeter main body, an electricity testing device, a lead wire and a pointer, the megohmmeter main body is connected with the pointer through the lead wire, and the electricity testing device is connected with the pointer. The megohmmeter can detect whether the measured object is electrified through the electricity testing device, and can detect the insulation resistance of the measured object through the megohmmeter main body, and the detection of the insulation resistance can be stopped when the measured object is electrified, so that the safety of measurement is improved, and the personal safety of the operator is ensured.
[0055] In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the application can be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been described in detail in order to not obscure the understanding of this description.
[0056] Similarly, it is to be understood that the embodiments of the application can be used in the exact form disclosed herein, or with minor modifications, and the embodiments of the application are not limited to the specific embodiments described herein. In some instances, well-known methods, structures and techniques have not been described in detail in order to not obscure the understanding of this description.
[0057] It should be noted that the foregoing embodiments are illustrative rather than limiting, and that modifications are possible within the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word comprising" does not exclude the presence of elements other than those listed in the claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application can be implemented by means of both hardware and software, and any combination thereof. In a unit claim, several elements can be presented - the use of the terms "first", "second", "third", etc. does not indicate any order. These terms are to be interpreted as names.
Claims
1. A megohmmeter characterized in that, The megohmmeter comprises a megohmmeter body, an electricity testing device, a lead and a pointer, the megohmmeter body is connected with the pointer through the lead, and the electricity testing device is connected with the pointer; the electricity testing device is arranged on the pointer; the megohmmeter body comprises a measuring end and a grounding end; The megohmmeter body is used for measuring the insulation resistance of a measured object; and the electricity testing device is used for measuring the voltage of the measured object. The electricity testing device comprises a voltage sensor, the voltage sensor is connected with the pointer, and the voltage sensor is used for measuring the voltage of the measured object. The electricity testing device further comprises an alarm, and the voltage sensor is connected with the alarm. The electricity testing device further comprises a signal processing module, which is connected with the alarm and the voltage sensor respectively; the voltage sensor is used for sending a voltage signal to the signal processing module; the signal processing module is used for processing and analyzing the received voltage signal, and if it is analyzed that the voltage of the measured object is greater than a preset voltage threshold, an alarm signal is sent to the alarm; and the alarm is used for alarming if the alarm signal sent by the signal processing module is received. The megohmmeter further comprises a relay, a power supply end of the relay is connected with the pointer, and a normally closed contact of the relay is connected in series between the megohmmeter body and the pointer; the relay is used for disconnecting the normally closed contact when the measured object is electrified, so that the megohmmeter body is disconnected with the measured object and cannot measure the insulation resistance; and the relay is further used for closing the normally closed contact when the measured object is not electrified, so that the megohmmeter body can measure the insulation resistance. The grounding end of the electricity testing device and the grounding end of the relay are connected with the grounding end of the megohmmeter body.
2. The megohmmeter of claim 1, wherein, The alarm comprises a light alarm, and the light alarm is connected with the voltage sensor.
3. The megohmmeter of claim 1, wherein, The alarm comprises a sound alarm, and the sound alarm is connected with the voltage sensor.
4. The megohmmeter of claim 1, wherein, The electricity testing device comprises a display screen.
5. The megohmmeter of claim 1, wherein, The electricity testing device comprises a plurality of voltage measurement gears.
6. The megohmmeter of claim 1, wherein, The relay is arranged in the megohmmeter body.