CN211235985U - Universal error-measurement-preventing meter pen for multimeter - Google Patents
Universal error-measurement-preventing meter pen for multimeter Download PDFInfo
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- CN211235985U CN211235985U CN201921522242.1U CN201921522242U CN211235985U CN 211235985 U CN211235985 U CN 211235985U CN 201921522242 U CN201921522242 U CN 201921522242U CN 211235985 U CN211235985 U CN 211235985U
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- universal
- meter pen
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Abstract
The utility model discloses a universal multimeter prevents mistake measuring pen-shape metre, include: the pen comprises an insulating pen holder, a meter pen probe, an electrified identification device and a meter pen plug; the method is characterized in that: a meter pen probe is mounted at one end of the insulating pen holder, and a metal elastic sheet is arranged on the meter pen probe; the other end of the insulated pen holder is connected with the electrified recognition device; the electrified recognition device is connected with the meter pen plug. The utility model discloses whether enough detect the external circuit electrified, avoid under the external measurement return circuit electrified condition, use the ohmic shelves of universal meter and when switching on the gear of electrified sources such as shelves, defeated to measuring the return circuit with its inside voltage, play and prevent mistake measuring effect, prevent that the meter from burning out, protection personal safety.
Description
Technical Field
The utility model relates to an universal meter field specifically is a universal meter prevents mistake measuring pen-shape metre.
Background
When a traditional multimeter is used for measuring an ohmic level, a voltage level is manually used for detecting whether a loop is electrified or not, and then resistance measurement is carried out; if the external loop to be measured is electrified, the meter can be damaged, and even a person gets an electric shock; when people use the universal meter to measure, if negligence is large, the voltage of the ohm measuring loop can be misused, so that the safety risk exists in the measurement work.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the not enough of prior art, provide a can detect whether electrified universal meter pen-shape metre of external circuit.
The utility model discloses a realize through following technique:
a universal multimeter mis-measurement prevention stylus comprising: the pen comprises an insulating pen holder, a meter pen probe, an electrified identification device and a meter pen plug; a meter pen probe is mounted at one end of the insulating pen holder, and a metal elastic sheet is arranged on the meter pen probe; the other end of the insulated pen holder is connected with the electrified recognition device; the electrified recognition device is connected with the meter pen plug.
Further, the charged identification device includes: the device comprises a controller, a system power supply, a meter pen interface and an acousto-optic alarm device; the controller is respectively electrically connected with the system power supply, the meter pen interface and the acousto-optic alarm device; a relay switching circuit, a signal conditioning circuit and AD conversion are sequentially arranged between the meter pen interface and the controller; the system power supply is electrically connected with the relay switching circuit.
Further, the controller is a single chip microcomputer.
Furthermore, the insulating pen holder is provided with anti-skidding threads.
Furthermore, the meter pen plug adopts a universal plug which can be universally used in various universal meter socket holes.
The utility model has the advantages that:
1. the utility model discloses whether enough detect the external circuit electrified, avoid under the external measurement return circuit electrified condition, use the ohmic shelves of universal meter and when switching on the gear of electrified sources such as shelves, defeated to measuring the return circuit with its inside voltage, play and prevent mistake measuring effect, prevent that the meter from burning out, protection personal safety.
2. Adopt general plug, can directly replace the pen-shape metre of former universal meter, portable, the suitability is strong.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the electrified recognition device of the present invention.
Reference signs mean: 1. insulating the penholder; 2. a stylus probe; 3. a charging identification device; 301. a controller; 302. a system power supply; 303. a meter pen interface; 304. a relay switching circuit; 305. a signal conditioning circuit; 306. AD conversion; 307. an audible and visual alarm device; 4. a meter pen plug; 5. a metal spring.
Detailed Description
In order to make the technical solution, objects and advantages of the present invention more apparent, the present invention will be further explained with reference to the accompanying drawings and embodiments.
1-2, a universal multimeter mis-measurement prevention stylus, comprising: the pen comprises an insulating pen holder 1, a meter pen probe 2, an electrified recognition device 3 and a meter pen plug 4; the insulating pen holder 1 and the meter pen plug 4 are respectively provided with two groups, the meter pen plug 4 is distinguished by red and black, wherein the red meter pen plug is connected with the positive end of the universal meter, and the black meter pen plug is connected with the common end of the universal meter; a meter pen probe 2 is arranged at one end of the insulated pen holder 11, and a metal elastic sheet 5 is arranged on the meter pen probe 2; when the meter pen probe 2 is used for measuring a hole type test terminal for a relay protection device, the metal elastic sheet 5 is compressed under force and can be fixed on the test terminal, so that the measurement by holding the meter pen probe by hand is avoided; the other end of the insulated pen holder 1 is connected with the electrified recognition device 3 through a wire; the electrified recognition device 3 is connected with the meter pen plug 4 through a lead.
Further, the electrification identifying apparatus 3 includes: a controller 301, a system power supply 302, a stylus interface 303 and an acousto-optic warning device 307; the controller 301 is electrically connected with the system power supply 302, the meter pen interface 303 and the acousto-optic alarm device 307 respectively; a relay switching circuit 304, a signal conditioning circuit 305 and an AD conversion circuit 306 are sequentially arranged between the meter pen interface 303 and the controller 301; the system power supply 302 is electrically connected with the relay switching circuit 304; the live indicator lamp in the audible and visual alarm device 307 is arranged on the insulated pen holder 1.
The controller 301 is an MSP430 single chip microcomputer, and the MSP430 single chip microcomputer processes, calculates and compares data with a preset value; if the voltage of the circuit of the loop to be tested exceeds a set threshold, indicating that voltage exists in the loop, and sending an audible and visual alarm signal; if the voltage is zero, the measurement is performed.
The anti-skidding threads are arranged on the insulating pen holder 1, so that the friction force between a hand and the insulating pen holder 1 is increased, and accidents caused by the fact that the hand is slippery when the insulating pen holder is used are avoided.
The meter pen plug 4 adopts a universal plug suitable for various universal meter socket holes.
The working principle is as follows: the relay switching circuit 304 controls the on-off of the test pen and the multimeter, the electrified identification device 3 automatically detects the gear of the multimeter after being connected to a multimeter base, if the universal multimeter is identified to be a non-ohmic gear, a conducting gear and other electrified voltage output gears, the universal multimeter error-prevention measurement pen is the same as the common multimeter pen, and alternating current and direct current voltage measurement can be carried out;
if the voltage output gears such as the ohmic gear, the conduction gear and the like are identified, the relay switching circuit 304 is disconnected, and the loop between the meter pen and the universal meter is disconnected; during measurement, the electrification identification device 3 automatically detects whether a measured loop is electrified, if the loop is not electrified, the relay switching circuit 304 is closed, the loop between the test pen and the universal meter is connected, and measurement of an ohmic gear and a conduction gear can be carried out; if the loop is electrified, the relay switching circuit 304 is kept disconnected, the multimeter does not measure, and the function of preventing error measurement is realized.
The above is only the preferred embodiment of the present invention, and to the technical personnel in the technical field, without departing from the present invention, the embodiment can still be modified, and the corresponding modification should also be regarded as the protection scope of the present invention.
Claims (4)
1. A universal multimeter mis-measurement prevention stylus comprising: the pen comprises an insulating pen holder, a meter pen probe, an electrified identification device and a meter pen plug; the method is characterized in that: a meter pen probe is mounted at one end of the insulating pen holder, and a metal elastic sheet is arranged on the meter pen probe; the other end of the insulated pen holder is connected with the electrified recognition device; the electrified recognition device is connected with the meter pen plug.
2. The universal multimeter mis-measurement prevention stylus of claim 1, wherein: the charged identification device includes: the device comprises a controller, a system power supply, a meter pen interface and an acousto-optic alarm device; the controller is respectively electrically connected with the system power supply, the meter pen interface and the acousto-optic alarm device; a relay switching circuit, a signal conditioning circuit and AD conversion are sequentially arranged between the meter pen interface and the controller; the system power supply is electrically connected with the relay switching circuit.
3. The universal multimeter mis-measurement prevention stylus of claim 2, wherein: the controller is a single chip microcomputer.
4. The universal multimeter mis-measurement prevention stylus of claim 1, wherein: and the insulating pen holder is provided with anti-skid threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921522242.1U CN211235985U (en) | 2019-09-12 | 2019-09-12 | Universal error-measurement-preventing meter pen for multimeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921522242.1U CN211235985U (en) | 2019-09-12 | 2019-09-12 | Universal error-measurement-preventing meter pen for multimeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211235985U true CN211235985U (en) | 2020-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921522242.1U Active CN211235985U (en) | 2019-09-12 | 2019-09-12 | Universal error-measurement-preventing meter pen for multimeter |
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| CN (1) | CN211235985U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110702962A (en) * | 2019-10-29 | 2020-01-17 | 中国南方电网有限责任公司超高压输电公司柳州局 | Universal meter pen of digital multimeter with anti-error measurement function |
-
2019
- 2019-09-12 CN CN201921522242.1U patent/CN211235985U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110702962A (en) * | 2019-10-29 | 2020-01-17 | 中国南方电网有限责任公司超高压输电公司柳州局 | Universal meter pen of digital multimeter with anti-error measurement function |
| CN110702962B (en) * | 2019-10-29 | 2021-12-17 | 中国南方电网有限责任公司超高压输电公司柳州局 | Universal meter pen of digital multimeter with anti-error measurement function |
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