Detection device for rapidly measuring safety current

Abstract

The utility model relates to a detection device for quickly measuring a safety current. The detection device comprises an operation panel (1), a shell (2) and a circuit assembly (3), after the power switch (13) is closed, the direct-current power supply (31) supplies power to the 12 embedded ammeters (12) respectively through the power supply circuit terminal strip (32) and the power supply circuit (321), and the negative ends of the direct-current power supply (31) and the 12 embedded ammeters (12) are grounded. One end of the detection cable (222) is connected with a corresponding channel interface of equipment to be detected, the other end of the detection cable (222) is connected with an external port of the detection circuit terminal strip (33), and a signal to be detected enters the detection circuit terminal strip (33) through the detection cable (222), then passes through the detection circuit (331) and is introduced into the embedded ammeter (12) for detection and display of a corresponding numerical value. Safety currents of four channels can be detected at the same time, and efficiency is improved; the embedded ammeter is integrated on the detection device, so that accessory tools are reduced, and the portability is improved; the original circuit design is improved, a change-over switch and positive and negative contacts are omitted, and manual operation errors are prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of equipment guarantee auxiliary tools, and in particular relates to a detection device for quickly measuring safety current. Background Art

[0002] Safety current detection is mainly used in emergency preparation or equipment repair process to detect the safety current of the 4 channels on the vehicle to ensure that each channel circuit is in good condition and unobstructed. The detection current value is required to be within the index range to prevent accidents during emergency preparation and equipment repair. It is a very important part of safety inspection in equipment support and is of great significance to ensure safe and smooth power-on preparation and maintenance.

[0003] The current safety current inspection method is to use the safety current test tooling and the on-board multimeter equipped by the original equipment to check the safety current of the four channels in turn. This method uses a single tooling cable and can only check one channel at a time. Each time a channel is tested, it is necessary to plug and unplug the test cable once, and then power it off and on again. The procedure is cumbersome and inefficient. At the same time, the external cable hole of the tooling structure is too large and has no sealing treatment. It is easy for water to enter in rainy and snowy weather, causing a short circuit in the circuit. It is easy for sand and dust to enter in dusty weather, causing poor contact. The tooling cable is not reliably fixed to the tooling, and frequent pulling of the cable can easily cause the internal solder joints to be desoldered. The internal wiring is random, there is no fixed wiring, and it is relatively messy, which is not conducive to rapid troubleshooting and repair of the line. In addition, the tooling cannot be tested independently, and a multimeter needs to be introduced to measure again, leading to 6 positive and negative contacts and a conversion switch. There are many human-involved operation links, which increases the error rate of operation.

[0004] Therefore, it is necessary to design a safe current testing device that has rapid detection, reasonable structure, easy operation, and adaptability to harsh environments to meet the needs of specific use. Summary of the invention

[0005] Aiming at the inconvenience of the safety current test tooling provided by the original equipment manufacturer, the utility model provides a detection device for quickly measuring the safety current, the device comprises an operation panel 1, a housing 2, and a circuit component 3;

[0006] The operation panel 1 is fixed to the housing 2 by screws at the four corners; a text mark 11 is printed on the operation panel 1; 4 groups of 12 embedded ammeters 12 are installed on both sides of the middle section of the operation panel 1, 3 in each column, respectively detecting 3 types of current, a total of 4 columns, respectively detecting 4 channels; a power switch 13 is installed at the lower end of the operation panel 1 to power on or off the detection device;

[0007] The housing 2 is a rectangular parallelepiped, with four sides and a bottom plate structure;

[0008] The housing front side plate 21 of the housing 2 has a detachable power supply cover plate 211;

[0009] Four cable connectors 222-1 are installed at the middle section of the rear side plate 22 of the housing corresponding to each channel position. The cable connectors 222-1 are connected to the detection cables, which are connected to the corresponding channel interfaces of the equipment under test via the detection cables.

[0010] The circuit component 3 is installed inside the shell 2, including an ammeter power supply component and a safety current signal detection component; the ammeter power supply component includes a DC power supply 31, a power switch 13, a power supply line terminal block 32, a power supply line 321, and an embedded ammeter 12; after the power switch 13 is closed, the DC power supply 31 is supplied to the 12 embedded ammeters 12 through the power supply line terminal block 32 and then through the power supply line 321, and the negative ends of the DC power supply 31 and the 12 embedded ammeters 12 are grounded; the safety current signal detection component includes a detection cable 222-2, a detection line terminal block 33, a detection line 331, and an embedded ammeter 12; one end of the detection cable 222-2 is connected to the corresponding channel interface of the equipment under test, and the other end is connected to the external port of the detection line terminal block 33, and the signal to be tested enters the detection line terminal block 33 through the detection cable 222-2, and then through the detection line 331, is introduced into the embedded ammeter 12 for detection, and the corresponding value is displayed; the ammeter power supply component and the safety current signal detection component share the embedded ammeter 12.

[0011] In a specific embodiment of the utility model, the operation panel 1 and the shell 2 use ABS engineering plastic sealing box as the main structure, the embedded ammeter uses a 0.36-inch 4-digit 200mA range digital milliammeter as the measuring device, the DC power supply 31 uses a working voltage 5-12V DC power supply as the power supply equipment of the embedded ammeter, and the detection cable 222-2 and the cable connector 222-1 use J599 / 20FJ43PN aviation plug.

[0012] In another specific embodiment of the present invention,

[0013] The operation panel 1 is printed with text labels 11, which are the name of "safety current detection device"; "channel-1, channel-2, channel-3, channel-4", indicating the four channels that need to be detected; "conversion current, functional current, safety current", indicating the names of the three currents that need to be detected in each channel;

[0014] At the lower end of the operation panel 1, the power switch 13 is printed with the words "ON / OFF";

[0015] The words “Channel-1, Channel-2, Channel-3, Channel-4” are printed on the upper end of the rear side plate 22 of the housing.

[0016] The utility model provides a detection device for quickly measuring safety current, which can detect the safety current of 4 channels at the same time to improve efficiency; and integrates an embedded ammeter on the detection device to reduce auxiliary tools and improve portability; and improves the original circuit design, cancels the conversion switch and positive and negative contacts, and prevents human operation errors.

[0017] Compared with the prior art, the improvements of the present invention are:

[0018] (1) In terms of operating procedures, the present invention changes the previous procedure of checking four channels in turn by adding a detection cable and an embedded ammeter, and adopts a simultaneous testing method to measure the safety current of the four channels of the equipment under test, thereby saving the time of repeatedly plugging and unplugging the detection cable and improving the equipment support efficiency.

[0019] (2) In terms of engineering design, the present invention installs the embedded ammeter on the safety current detection device to reduce the supporting measuring instruments and improve portability. Four detection cables are set to improve inspection efficiency. The device structure adopts a fully sealed ABS plastic material, and the external cable is fixed with a matching waterproof terminal to prevent erosion by rain, snow, sand and dust, while reducing its own weight and improving portability. The internal cables and contacts are fixed with guide rails, which is conducive to quick installation and line troubleshooting.

[0020] (3) In terms of circuit design, the present invention analyzes the 4-channel safety current test circuit and can connect the two ends of the "conversion current" to the milliammeter to achieve the connection of the functional circuit path, eliminate the design of the original tooling "short circuit" on-off switch, and realize automatic measurement without manual operation, thereby improving accuracy and reducing the error rate.

[0021] (4) The utility model adopts an error-proof design, has a fast detection speed, high accuracy, can adapt to complex environments, is low-cost, safe and reliable, and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the operation panel of the utility model;

[0023] Figure 2 This is a schematic diagram of the housing structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the front structure of the housing of the utility model;

[0025] Figure 4 This is a schematic diagram of the rear structure of the housing of the utility model;

[0026] Figure 5 This is a schematic diagram of the connection of the circuit components of the utility model.

[0027] Explanation of the accompanying drawings: 1. Operation panel, 11. Text label, 12. Embedded ammeter, 13. Power switch; 2. Shell, 21. Front side of shell, 22. Rear side of shell, 211. Power cover, 221. Channel label, 222-1. Cable connector, 222-2. Detection cable; 3. Circuit assembly, 31. DC power supply, 32. Power supply line terminal block, 33. Detection line terminal block, 321. Power supply line, 331. Detection line. DETAILED DESCRIPTION

[0028] The utility model discloses a detection device for quickly measuring a safety current, comprising an operation panel 1, a shell 2 and a circuit component 3.

[0029] In the usual manner in the art, the operation panel 1 is fixed to the housing 2 by screws at the four corners. Text labels 11 are printed on the operation panel 1, which are the name of "safety current detection device"; "Channel-1, Channel-2, Channel-3, Channel-4", indicating the four channels that need to be detected; "conversion current, functional current, safety current", indicating the names of the three currents that need to be detected in each channel. On both sides of the middle section of the operation panel 1, 4 groups of 12 embedded ammeters 12 are installed, 3 in each column, respectively detecting three types of currents, a total of 4 columns, respectively detecting 4 channels. At the lower end of the operation panel 1, a power switch 13 is installed, and the words "on / off" are printed on it to power on or off the detection device.

[0030] like Figure 2 As shown, the housing 2 is a rectangular parallelepiped with four sides and a bottom plate structure (the upper panel is vacant for installing the operation panel), and its main function is to fix the operation panel 1 and install the circuit component 3.

[0031] like Figure 3 As shown, the front side plate 21 of the shell 2 has a detachable power supply cover 211 (which contains a battery box and batteries and is a component of the DC power supply 31 in the circuit assembly 3), which is used to check and install the power supply to power the safety current detection device.

[0032] like Figure 4 As shown, the words "Channel-1, Channel-2, Channel-3, Channel-4" are printed on the upper end of the rear side plate 22 of the shell, indicating the names of the four channels that need to be tested; four cable connectors 222-1 are installed in the middle section of the rear side plate 22 of the shell corresponding to each channel position, and the cable connector 222-1 is connected to the detection cable, which is used to connect the corresponding channel interface of the tested equipment via the detection cable.

[0033] like Figure 5As shown, the circuit assembly 3 is installed inside the housing 2, and mainly realizes the power supply of the ammeter and the detection of the safety current signal. The circuit assembly 3 includes an ammeter power supply assembly and a safety current signal detection assembly. The ammeter power supply assembly includes a DC power supply 31, a power switch 13, a power supply line terminal block 32, a power supply line 321, and an embedded ammeter 12. After the power switch 13 is closed, the DC power supply 31 is supplied to the 12 embedded ammeters 12 through the power supply line terminal block 32, and then through the power supply line 321. The negative ends of the DC power supply 31 and the 12 embedded ammeters 12 are grounded. The safety current signal detection assembly includes a detection cable 222-2, a detection line terminal block 33, a detection line 331, and an embedded ammeter 12. One end of the detection cable 222-2 is connected to the corresponding channel interface of the equipment under test, and the other end is connected to the external port of the detection line terminal block 33. The signal to be tested enters the detection line terminal block 33 through the detection cable 222-2, and then through the detection line 331, it is introduced into the embedded ammeter 12 for detection, and the corresponding value is displayed. The ammeter power supply component and the safety current signal detection component share the embedded ammeter 12 .

[0034] In a specific embodiment of the utility model, the operation panel 1 and the shell 2 use ABS engineering plastic sealing box as the main structure, the embedded ammeter uses a 0.36-inch 4-digit 200mA range digital milliammeter as the measuring device, the DC power supply 31 uses a working voltage 5-12V DC power supply as the power supply equipment of the embedded ammeter, and the detection cable 222-2 and the cable connector 222-1 use J599 / 20FJ43PN aviation plug.

[0035] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with embodiments.

[0036] Example: Using the detection device to measure safe current

[0037] (1) First, connect the four detection cables of this device to the corresponding channel cable interfaces of the equipment under test.

[0038] (2) Turn on the power switch on the operation panel of the device, and the 4 groups of 12 ammeters will be powered on, and a 4-digit display will appear on the meter head.

[0039] (3) According to the safety current test procedure, the signal to be tested of the equipment under test is connected to this detection device through 4 detection cables and displayed on the corresponding ammeter. The operator can record and analyze the current values ​​of each group.

[0040] (4) After the test is completed, turn off the power switch and disconnect the test cable.

[0041] The innovation of the utility model is that the safety current test tooling that comes with the tested equipment is a single-channel test device, including a set of switch conversion mechanisms and a detection cable. When detecting the safety current, an external ammeter is required to detect the current value, and only one channel can be detected at a time. If the other three channels are to be detected, it is necessary to repeatedly plug and unplug the connection between the corresponding channel interface of the tested equipment and the detection cable, which is time-consuming and labor-intensive. Therefore, the utility model is provided with four detection cables, which can simultaneously detect the safety current of the four channels of the tested equipment, greatly saving time and improving efficiency. Moreover, the embedded ammeter is installed on the device of the utility model, and there is no need for an external ammeter, which reduces the ancillary equipment, has a high degree of integration, and is convenient for work use and carrying.

Claims

1. A detection device for quickly measuring safety current, characterized in that: The device comprises an operation panel (1), a housing (2), and a circuit component (3); wherein The operation panel (1) is fixed to the housing (2) by screws at four corners; a text mark (11) is printed on the operation panel (1); four groups of 12 embedded ammeters (12) are installed on both sides of the middle section of the operation panel (1), with three in each column, respectively detecting three types of current, and a total of four columns, respectively detecting four channels; a power switch (13) is installed at the lower end of the operation panel (1) to supply power to or disconnect the detection device; The housing (2) is a rectangular parallelepiped, with four sides having a bottom plate structure; A housing front side plate (21) of the housing (2) has a detachable power supply cover plate (211); Four cable connectors (222-1) are installed at the middle section of the rear side plate (22) of the housing corresponding to each channel position, and the cable connectors (222-1) are connected to detection cables, which are connected to the corresponding channel interfaces of the equipment under test via the detection cables; The circuit assembly (3) is installed inside the housing (2), and includes an ammeter power supply assembly and a safety current signal detection assembly; the ammeter power supply assembly includes a DC power supply (31), a power switch (13), a power supply line terminal block (32), a power supply line (321), and an embedded ammeter (12); after the power switch (13) is closed, the DC power supply (31) supplies power to the 12 embedded ammeters (12) through the power supply line terminal block (32) and then through the power supply line (321); the negative ends of the DC power supply (31) and the 12 embedded ammeters (12) are grounded; the safety current signal detection assembly includes a DC power supply (31), a power supply line terminal block (32), a power supply line (321), and an embedded ammeter (12); after the power switch (13) is closed, the DC power supply (31) supplies power to the 12 embedded ammeters (12) through the power supply line terminal block (32) and then through the power supply line (321); the negative ends of the DC power supply (31) and the 12 embedded ammeters (12) are grounded; The test component comprises a test cable (222-2), a test circuit terminal block (33), a test circuit (331), and an embedded ammeter (12); one end of the test cable (222-2) is connected to a corresponding channel interface of the tested equipment, and the other end is connected to an external port of the test circuit terminal block (33); a signal to be tested enters the test circuit terminal block (33) through the test cable (222-2), and then passes through the test circuit (331) to be introduced into the embedded ammeter (12) for testing, and displays a corresponding value; the ammeter power supply component and the safety current signal detection component share the embedded ammeter (12).

2. The detection device for quickly measuring safety current according to claim 1, characterized in that: The operation panel (1) and the housing (2) use an ABS engineering plastic sealed box as the main structure, the embedded ammeter uses a 0.36-inch 4-digit 200mA range digital milliammeter as a measuring device, the DC power supply (31) uses a working voltage 5-12V DC power supply as the power supply device of the embedded ammeter, and the detection cable (222-2) and the cable connector (222-1) use a J599 / 20FJ43PN aviation plug.

3. The detection device for quickly measuring safety current according to claim 1, characterized in that: The operation panel (1) is printed with text labels (11), which are respectively the name of "safety current detection device"; "channel-1, channel-2, channel-3, channel-4", indicating the four channels that need to be detected; "conversion current, functional current, safety current", indicating the names of the three types of currents that need to be detected in each channel; At the lower end of the operation panel (1), the power switch (13) is printed with the words "ON / OFF"; The upper end of the rear side plate (22) of the housing is printed with the words "channel-1, channel-2, channel-3, channel-4".

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