CN104865431A - Universal meter measuring gear warning system - Google Patents

Abstract

The invention discloses a multimeter measuring gear warning system, which solves the problem that the measuring gear is easily misused due to the lack of prompts in the use of the multimeter. Including that a capacitive touch-sensitive micro switch (3) of the red test lead (1) is set on the pen body of the red test lead (1), and a DC power supply (12), a flashing prompt light-emitting diode (9), and a voice prompt are respectively set on the multimeter (14). device (10), warning circuit switch (11) and the red test lead touch-sensitive connection jack (7), one end of the red test lead capacitive touch-sensitive micro switch (3) is connected to the A terminal of the red test lead touch-sensitive connection plug (5) Connection, the other end of the capacitive touch sensing micro switch (3) of the red test pen is electrically connected with the B terminal of the touch sensing connecting plug (5) of the red test pen, and the capacitive touch sensing micro switch of the red test pen (3) is connected with the flashing light-emitting diode (9), the voice prompter (10) is electrically connected. The safety of the measuring meter and the circuit under test is guaranteed.

Description

A kind of multimeter measurement gear warning system

technical field

The invention relates to an electrical quantity parameter test alarm prompt system, in particular to a multimeter gear position alarm prompt system, which is suitable for use on testing instruments and equipment for measuring electrical quantity parameters such as AC and DC voltage, current, and resistance.

Background technique

The multimeter is a common measurement tool, which is mainly composed of three main parts: the display meter, the measurement circuit and the transfer switch. By changing the gear switch of the multimeter, the parameters such as AC and DC voltage, AC and DC current, and resistance can be measured, so the multimeter has been widely used in all walks of life. During the use of the multimeter, it is necessary to change the measurement gear frequently according to the actual situation of the measurement. However, the current multimeter test instrument does not have a gear prompt function, and it often occurs that the multimeter is damaged or the circuit under test is abnormal due to forgetting to switch gears. . For example, if the multimeter gear switch is in the current measurement gear or the resistance measurement gear to measure the voltage, the multimeter will burn out. Another example: when the relay protection equipment is driven during the operation of the substation switch, it is generally judged whether the circuit is correct or not by measuring the DC voltage value on both sides of the outlet pressure plate with a multimeter. The voltage of the circuit may cause the operation switch to trip by mistake, resulting in the occurrence of a power outage in the substation.

Contents of the invention

The invention provides a warning system for the measurement gear of the multimeter, which solves the technical problem that the measurement gear is easily misused due to the lack of prompts in the use of the multimeter.

The present invention solves the above technical problems through the following technical solutions:

A multimeter measurement gear warning system, comprising a multimeter, the multimeter is respectively provided with a multimeter gear switching switch, a red test lead test jack and a black test lead test jack, and the red test lead is inserted into the red test lead test plug through the red test lead test plug. In the jack, the black test lead is plugged into the black test lead test jack through the black test lead test plug, the red test lead capacitive touch-sensitive micro switch is set on the body of the red test lead, and the DC power supply and flashing prompt are respectively set on the multimeter. Light-emitting diode, voice prompter, warning circuit switch and red test lead touch-sensing connection jack, one end of the red test lead capacitive touch-sensing micro switch is electrically connected with the A terminal of the red test lead touch-sensing connection plug, the red test lead capacitive touch-sensing The other end of the micro switch is electrically connected with the B terminal of the touch-sensitive connection plug of the red test pen, and the A terminal of the touch-sensitive connection plug of the red test pen is electrically connected with one end of the warning circuit switch through the touch-sensitive connection jack of the red test pen. The B end of the touch-sensitive connection plug is electrically connected to one end of the voice prompter through the touch-sensitive connection jack of the red test pen, the other end of the voice prompter is electrically connected to the negative end of the DC power supply, and the positive end of the DC power supply is connected to the warning The other ends of the circuit switch are electrically connected together, and a flashing light-emitting diode is connected in parallel on the voice prompter.

A black test lead capacitive touch-sensing micro switch is arranged on the body of the black test lead, and a black test lead touch-sensing connection jack is arranged on the multimeter, and one end of the black test lead capacitive touch-sensing micro switch is connected to the C The terminals are electrically connected together, the other end of the capacitive touch-sensing micro switch of the black test lead is electrically connected with the D terminal of the black test lead touch-sensing connection plug, and the C-end of the black test lead touch-sensing connection plug is connected with the black test lead touch-sensing connection jack. The A terminal of the touch-sensitive connection plug of the red test pen is electrically connected together, and the D terminal of the touch-sensing connection plug of the black test pen is electrically connected with the B terminal of the touch-sensing connection plug of the black test pen through the touch-sensing connection jack of the black test pen.

The body of the red test lead is provided with a plurality of parallel capacitive touch-sensitive micro switches of the red test lead; the body of the black test lead is provided with a plurality of parallel capacitive touch-sensitive micro switches of the black test lead.

The invention realizes the safety test process that the user of the multimeter must first confirm the gear position and then perform the measurement through sound and light prompts. It solves the defects of meter damage and abnormality of the circuit under test caused by the current multimeter without a gear prompt system, and ensures the safety of the meter and the circuit under test.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a structural schematic diagram of the warning circuit of the present invention.

Detailed ways

The present invention is described in detail below in conjunction with accompanying drawing:

A multimeter measurement gear warning system, comprising a multimeter 14, the multimeter 14 is respectively provided with a multimeter gear switching switch 13, a red test lead test jack 17 and a black test lead test jack 18, and the red test lead 1 passes through the red test lead test plug 15 is plugged into the red test lead test socket 17, the black test lead 2 is plugged into the black test lead test socket 18 through the black test lead test plug 16, and a red test lead capacitive touch-sensitive micro switch is set on the pen body of the red test lead 1 3. The multimeter 14 is respectively provided with a DC power supply 12, a flashing light-emitting diode 9, a voice prompter 10, a warning circuit switch 11 and a red test lead touch-sensitive connection jack 7, and one end of the red test lead capacitive touch-sensitive micro switch 3 is connected to the The A terminal of the red test pen touch-sensing connection plug 5 is electrically connected together, the other end of the red test pen capacitive touch-sensing micro switch 3 is electrically connected with the B terminal of the red test pen touch-sensing connecting plug 5, and the red test pen touch-sensing connecting plug 5 The A end of the red test pen is electrically connected to one end of the warning circuit switch 11 through the touch-sensitive connection jack 7 of the red test pen, and the B end of the touch-sensitive connection plug 5 of the red test pen is connected to one end of the jack 7 and the voice prompter 10 through the touch-sensitive connection of the red test pen Electrically connected together, the other end of the voice prompter 10 is electrically connected with the negative end of the DC power supply 12, the positive end of the DC power supply 12 is electrically connected with the other end of the warning circuit switch 11, and connected in parallel on the voice prompter 10 There are flashing light-emitting diodes 9 for prompting.

The body of the black test lead 2 is provided with a black test lead capacitive touch-sensing micro switch 4, and the multimeter 14 is provided with a black test lead touch-sensing connection jack 8, and one end of the black test lead capacitive touch-sensing micro switch 4 is touched with the black test lead. The C terminals of the sensing connection plug 6 are electrically connected together, the other end of the capacitive touch sensing micro switch 4 of the black test pen is electrically connected with the D terminal of the black test pen touch sensing connection plug 6, and the C terminal of the black test pen touch sensing connection plug 6 The A terminal of the touch-sensitive connection plug 5 of the black test lead is electrically connected through the touch-sensitive connection jack 8 of the black test lead, and the D-end of the touch-sensitive connection plug 6 of the black test lead is connected with the touch-sensitive connection of the red test lead through the touch-sensitive connection jack 8 of the black test lead The B terminals of the plug 5 are electrically connected together.

When the tester uses the multimeter, since the body of the red test lead 1 is provided with a plurality of parallel capacitive touch-sensitive micro switches 3 of the red test lead, and the body of the black test lead 2 is provided with a plurality of parallel capacitive touch sensors of the black test lead. Inductive micro switch 4, when both hands touch the sensing area of the red and black test leads, as long as any one of the capacitive touch sensing micro switch 3 of the red test lead and the capacitive touch sensing micro switch 4 of the black test lead is connected, the flash will be triggered Prompt the light-emitting diode 9 to emit light, and the voice prompter 10 sends a prompt sound. The light-emitting diode 9 flashes at a frequency of 3 times per second through the flashing signal light, and is always in the state of flashing during the entire test; the voice prompter 10 broadcasts "please" at a frequency of every 2 seconds through the speaker for 10 seconds "Confirm the gear position" prompt voice, and then enter the procedure of prompting again every 15 seconds.

Claims (3)

1. gear caution system measured by a multimeter, comprise multimeter (14), multimeter (14) is respectively arranged with multimeter gear switch transition switch (13), red test pencil test jack (17) and black meter pen test jack (18), red test pencil (1) is plugged in red test pencil test jack (17) by red test pencil test plug (15), black meter pen (2) is plugged in black meter pen test jack (18) by black meter pen test plug (16), it is characterized in that, the handwriting of red test pencil (1) is provided with red test pencil capacitance touch induction microswitch (3), multimeter (14) is respectively arranged with direct supply (12), flashing indicating light emitting diode (9), voice prompting device (10), warning circuit switch (11) is connected jack (7) with red test pencil touch sensible, red one end of test pencil capacitance touch induction microswitch (3) and the A of red test pencil touch sensible attachment plug (5) hold and are electrically connected, the red other end of test pencil capacitance touch induction microswitch (3) and the B of red test pencil touch sensible attachment plug (5) hold and are electrically connected, the A end of red test pencil touch sensible attachment plug (5) connects jack (7) by red test pencil touch sensible and is electrically connected with one end of warning circuit switch (11), the B end of red test pencil touch sensible attachment plug (5) connects jack (7) by red test pencil touch sensible and is electrically connected with one end of voice prompting device (10), the other end of voice prompting device (10) and the negative terminal of direct supply (12) are electrically connected, the anode of direct supply (12) and the other end of warning circuit switch (11) are electrically connected, voice prompting device (10) is parallel with flashing indicating light emitting diode (9).

2. gear caution system measured by a kind of multimeter according to claim 1, it is characterized in that, the handwriting of black meter pen (2) is provided with black meter pen capacitance touch induction microswitch (4), multimeter (14) is provided with black meter pen touch sensible and connects jack (8), one end of black meter pen capacitance touch induction microswitch (4) and the C of black meter pen touch sensible attachment plug (6) hold and are electrically connected, the other end of black meter pen capacitance touch induction microswitch (4) and the D of black meter pen touch sensible attachment plug (6) hold and are electrically connected, the C end of black meter pen touch sensible attachment plug (6) connects jack (8) by black meter pen touch sensible and to hold with the A of red test pencil touch sensible attachment plug (5) and be electrically connected, the D end of black meter pen touch sensible attachment plug (6) connects jack (8) by black meter pen touch sensible and to hold with the B of red test pencil touch sensible attachment plug (5) and be electrically connected.

3. gear caution system measured by a kind of multimeter according to claim 2, it is characterized in that, the handwriting of red test pencil (1) is provided with red test pencil capacitance touch induction microswitch (3) of multiple parallel connection; The handwriting of black meter pen (2) is provided with black meter pen capacitance touch induction microswitch (4) of multiple parallel connection.