CN215833562U

CN215833562U - Proximity switch tester

Info

Publication number: CN215833562U
Application number: CN202121641789.0U
Authority: CN
Inventors: 吴杰; 江宏伟; 邵明栓; 何顺华
Original assignee: Controlway Industrial Automation Systems Suzhou Co Ltd
Current assignee: Suzhou Kangrui Electrical Technology Co ltd
Priority date: 2021-07-19
Filing date: 2021-07-19
Publication date: 2022-02-15
Anticipated expiration: 2031-07-19

Abstract

The utility model discloses a proximity switch tester, comprising: the power supply module comprises a rectifying circuit, a relay switch and an adjustable constant voltage source circuit which are sequentially connected, and a charging circuit and a charging battery are sequentially connected between the rectifying circuit and the relay switch; the port module comprises a power supply port and a measurement port, and the power supply port is connected with the adjustable constant voltage source circuit; the measuring module comprises a second current measuring module, a voltage measuring module and a signal processing circuit for changing a signal processing mode, the second current measuring module is connected between the signal processing circuit and the measuring port in series, and the voltage measuring module is connected between the signal processing circuit and the second current measuring module. The portable intelligent household appliance is convenient to carry, and can be normally used in occasions where commercial power is not available or is inconvenient to access; and the voltage and current information of the proximity switch can be read quickly, and the functionality of the tester is improved.

Description

Proximity switch tester

Technical Field

The utility model relates to a flat tester, in particular to a portable proximity switch tester which can measure the voltage and the current of a proximity switch and prompt the NPN normally open mode, the NPN normally closed mode, the PNP normally open mode and the PNP normally closed mode of the proximity switch.

Background

The proximity switch is also called contactless proximity switch, and is an ideal electronic switching value sensor. The proximity switch is divided into an NPN output mode and a PNP output mode according to the output mode, two output lines which are normally open and normally closed are respectively arranged according to the output lines, and the working voltage is generally 12V or 24V direct current. At present, the commonly used proximity switch tester only provides the functions of proximity switch output mode detection and necessary power supply for detection under the condition of mains supply access, reduces the application scenes of the tester, and ensures that the tester cannot be conveniently carried to any place for use. In addition, the conventional proximity switch cannot measure the voltage and the current consumption of the proximity switch, and if voltage and current data are acquired, an external wired meter is required, which is time-consuming and space-consuming.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a proximity switch tester which is convenient to carry and can be normally used in occasions without commercial power or occasions inconvenient to access the commercial power; and the voltage and current information of the proximity switch can be read quickly, and the functionality of the tester is improved.

In order to solve the above technical problem, the present invention provides a proximity switch tester, including: the power supply module comprises a rectifying circuit, a relay switch and an adjustable constant voltage source circuit, wherein the rectifying circuit is used for rectifying alternating current into direct current, the relay switch is used for selecting an input voltage source, the adjustable constant voltage source circuit is used for adjusting and stabilizing working voltage, and a charging circuit for charging a rechargeable battery and the rechargeable battery for providing direct current input voltage are sequentially connected between the rectifying circuit and the relay switch; the port module comprises a power supply port and a measurement port, and the power supply port is connected with the adjustable constant voltage source circuit; the measuring module comprises a second current measuring module, a voltage measuring module and a signal processing circuit for changing a signal processing mode, the second current measuring module is connected between the signal processing circuit and the measuring port in series, and the voltage measuring module is connected between the signal processing circuit and the second current measuring module.

Preferably, a first current measuring module for measuring the current consumed by the proximity switch is connected in series between the adjustable constant voltage power supply circuit and the power supply port.

Preferably, the current measuring device comprises a display module, and the first current measuring module, the second current measuring module and the voltage measuring module are all connected with the display module.

Preferably, the signal processing circuit includes a first signal processing circuit and a second signal processing circuit, the measurement port includes a normally open port and a normally closed port, and the normally open port and the normally closed port are respectively connected to the first signal processing circuit and the second signal processing circuit through the second current measurement module.

Preferably, the first signal processing circuit and the second signal processing circuit are provided with coding switches for changing signal processing modes, and two stations of the coding switches respectively correspond to an NPN output mode and a PNP output mode of the proximity switch.

Preferably, the device comprises indicators for indicating the proximity switches in four modes of NPN normally open, NPN normally closed, PNP normally open and PNP normally closed.

Preferably, the indicator is an LED capable of indicating light or an acoustic indicator.

Preferably, the power port comprises a power positive port and a power negative port, and the power positive port and the power negative port are both connected to the adjustable constant voltage circuit.

Preferably, a relay coil is arranged between the rectifying circuit and the mains supply input.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model can make the tester work in two modes, namely a commercial power mode and a battery mode, through an optimized design. Under the mains supply mode, the rectifying circuit is connected with a mains supply input, at the moment, the relay switch enables the input voltage of the adjustable constant voltage source circuit to be provided by the rectifying circuit, and the adjustable constant voltage source circuit supplies power for the whole tester. Meanwhile, the rectifying circuit can also be connected with a rechargeable battery through a charging circuit, and the rechargeable battery is selectively charged or not charged according to the residual electric quantity. In the battery mode, the rectifying circuit is disconnected from the mains supply input, the relay switch enables the input voltage of the adjustable constant current source circuit to be provided by the rechargeable battery, and the adjustable constant voltage source circuit supplies power to the whole tester. At this time, neither the rectifier circuit nor the charging circuit operates. The measuring port is used for measuring the current of the proximity switch in the normally open state and the normally closed state by the second current measuring module and transmitting the current to the signal processing circuit. Meanwhile, the voltage measuring module measures the voltage of the proximity switch and transmits the voltage to the signal processing circuit. The signal processing circuit adjusts the NPN output mode and the PNP output mode of the proximity switch into a corresponding processing mode and outputs prompt. The portable intelligent household appliance is convenient to carry, and can be normally used in occasions where commercial power is not available or is inconvenient to access; and the voltage and current information of the proximity switch can be read quickly, and the functionality of the tester is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to be able to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of the connection structure of a proximity switch tester according to a preferred embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.

Examples

Referring to fig. 1, the utility model discloses a proximity switch tester, which comprises a power supply module, a port module and a measuring module. The power supply module comprises a rectifying circuit, a relay switch and an adjustable constant voltage source circuit, wherein the rectifying circuit is used for rectifying alternating current into direct current, the relay switch is used for selecting an input voltage source, and the adjustable constant voltage source circuit is used for adjusting and stabilizing working voltage. And a charging circuit for charging the rechargeable battery and the rechargeable battery for providing direct-current input voltage are sequentially connected between the rectifying circuit and the relay switch. The port module includes a power port and a measurement port. The power supply port is connected with the adjustable constant voltage source circuit. The measuring module comprises a second current measuring module, a voltage measuring module and a signal processing circuit for changing the signal processing mode. The second current measurement module is connected in series between the signal processing circuit and the measurement port. And a voltage measuring module is connected between the signal processing circuit and the second current measuring module. The optimized design can make the tester work in two modes, namely a mains supply mode and a battery mode. Under the mains supply mode, the rectifying circuit is connected with a mains supply input, at the moment, the relay switch enables the input voltage of the adjustable constant voltage source circuit to be provided by the rectifying circuit, and the adjustable constant voltage source circuit supplies power for the whole tester. Meanwhile, the rectifying circuit can also be connected with a rechargeable battery through a charging circuit, and the rechargeable battery is selectively charged or not charged according to the residual electric quantity. In the battery mode, the rectifying circuit is disconnected from the mains supply input, the relay switch enables the input voltage of the adjustable constant current source circuit to be provided by the rechargeable battery, and the adjustable constant voltage source circuit supplies power to the whole tester. At this time, neither the rectifier circuit nor the charging circuit operates. The measuring port is used for measuring the current of the proximity switch in the normally open state and the normally closed state by the second current measuring module and transmitting the current to the signal processing circuit. Meanwhile, the voltage measuring module measures the voltage of the proximity switch and transmits the voltage to the signal processing circuit. The signal processing circuit adjusts the NPN output mode and the PNP output mode of the proximity switch into a corresponding processing mode and outputs prompt. The tester is convenient to carry, and can be normally used in occasions without commercial power or occasions inconvenient to access the commercial power; and the voltage and current information of the proximity switch can be read quickly, and the functionality of the tester is improved.

Specifically, the signal processing circuit includes a first signal processing circuit and a second signal processing circuit. The measurement ports include normally open ports and normally closed ports. The normally-open port and the normally-closed port are respectively connected to the first signal processing circuit and the second signal processing circuit through the second current measuring module. The first signal processing circuit and the second signal processing circuit are provided with coding switches for changing signal processing modes. Two stations of the coding switch respectively correspond to the NPN output mode and the PNP output mode of the proximity switch. The first signal processing circuit is used for processing the normally open type proximity switch input, and the second signal processing circuit is used for processing the normally closed type proximity switch input.

In some preferred embodiments of the present invention, the tester further includes at least four levels of indicators for indicating the proximity switches in four modes, that is, NPN normally-open, NPN normally-closed, PNP normally-open, and PNP normally-closed. The indicator may be an LED capable of light indication or a sound field indicator that indicates acoustically.

The power supply port comprises a power supply positive port and a power supply negative port. The positive port and the negative port of the power supply are both connected to the adjustable constant voltage circuit.

In some preferred embodiments of the present invention, a first current measuring module for measuring the current consumed by the proximity switch is connected in series between the adjustable constant voltage power supply circuit and the positive power supply port and the negative power supply port. The working state of the proximity switch can be judged through the consumption value of the current measured by the first current measuring module. For example, when the current consumption on the positive port of the power supply is 0, it is proved that the power supply positive line of the proximity switch is broken; if the consumption value of the current on the positive side of the power supply exceeds a normal amount, it is proved that a short circuit occurs inside the proximity switch.

In order to visualize the values of the first current measuring module, the second current measuring module and the voltage measuring module, a display module may be provided on the tester. The first current measuring module, the second current measuring module and the voltage measuring module are all connected with the display module.

A relay coil is arranged between the rectifying circuit and the mains supply input. The relay coil can provide good protection for the whole tester in a mains supply input mode.

The embodiment needs to be supplemented with that: the utility model is composed of specific hardware structures such as a power supply module, a port module, a measurement module and the like, wherein part of hardware participates in the running process of a software program, and the software programs for assisting the local machine to run are all the existing reproducible software programs, thereby not forming the innovation point of the application.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A proximity switch tester, comprising:

the power supply module comprises a rectifying circuit, a relay switch and an adjustable constant voltage source circuit, wherein the rectifying circuit is used for rectifying alternating current into direct current, the relay switch is used for selecting an input voltage source, the adjustable constant voltage source circuit is used for adjusting and stabilizing working voltage, and a charging circuit for charging a rechargeable battery and the rechargeable battery for providing direct current input voltage are sequentially connected between the rectifying circuit and the relay switch;

the port module comprises a power supply port and a measurement port, and the power supply port is connected with the adjustable constant voltage source circuit;

the measuring module comprises a second current measuring module, a voltage measuring module and a signal processing circuit for changing a signal processing mode, the second current measuring module is connected between the signal processing circuit and the measuring port in series, and the voltage measuring module is connected between the signal processing circuit and the second current measuring module.

2. The proximity switch tester as recited in claim 1, wherein a first current measuring module for measuring current consumed by the proximity switch is connected in series between the adjustable constant voltage power supply circuit and the power supply port.

3. The proximity switch tester of claim 2, including a display module, the first current measurement module, the second current measurement module and the voltage measurement module all being connected to the display module.

4. The proximity switch tester of claim 1, wherein the signal processing circuit comprises a first signal processing circuit and a second signal processing circuit, the measurement port comprises a normally open port and a normally closed port, the normally open port and the normally closed port are connected to the first signal processing circuit and the second signal processing circuit, respectively, through the second current measurement module.

5. The proximity switch tester as claimed in claim 4, wherein the first signal processing circuit and the second signal processing circuit are provided with coding switches for changing signal processing modes, and two positions of the coding switches respectively correspond to the NPN output mode and the PNP output mode of the proximity switch.

6. The proximity switch tester of claim 5, comprising indicators for indicating the proximity switches in four modes, NPN normally open, NPN normally closed, PNP normally open, and PNP normally closed, respectively.

7. The proximity switch tester of claim 6, wherein the indicator is an LED capable of light indication or an audio indicator.

8. The proximity switch tester of claim 1, wherein the power port comprises a positive power port and a negative power port, both of which are connected to a variable constant voltage circuit.

9. The proximity switch tester as recited in claim 1, wherein a relay coil is provided between the rectifying circuit and the mains input.