CN211237112U

CN211237112U - Signal generator with infrared window

Info

Publication number: CN211237112U
Application number: CN201921585220.XU
Authority: CN
Inventors: 杜克华
Original assignee: Shenzhen Jiaronghua Technology Co ltd
Current assignee: Shenzhen Jiaronghua Technology Co ltd
Priority date: 2019-09-23
Filing date: 2019-09-23
Publication date: 2020-08-11
Anticipated expiration: 2029-09-23

Abstract

The utility model discloses a take signal generator of infrared window, including the signal generator body, the signal generator body includes input/output unit and signal processing unit, is provided with input/output unit on the casing of signal generator body, and the inside of signal generator body is provided with signal processing unit, and wherein, input/output unit is including going upward interface and down interface, and signal processing unit includes central processing unit and ferroelectric memory, goes upward the interface and includes RS-485 bus interface, infrared window, RS-232 interface and USB interface, and down interface includes two sets of pulse signal generation output interface. Has the advantages that: by flexibly collocating various input sources and providing one-to-one service for testing the pulse acquisition terminal, the signal generator can realize full coverage of the test of the pulse acquisition terminal.

Description

Signal generator with infrared window

Technical Field

The utility model relates to a system's equipment technical field of intelligence system of checking meter particularly, relates to a take signal generator of infrared window.

Background

The intelligent meter reading system equipment comprises main access equipment, intermediate routing equipment, terminal acquisition control equipment and auxiliary equipment. The main access equipment comprises a concentrator, a network interface, a converter and the like, the intermediate routing equipment comprises an isolator, an isolation repeater, a node router, a collector, a network node and the like, the terminal acquisition equipment comprises an intelligent water meter, an intelligent electric meter, an intelligent gas meter, a pulse acquisition terminal, a valve, a controller and the like, and the terminal acquisition auxiliary equipment comprises a signal generator, a programmer, a hand-copy device and the like. The signal generator is used as an important terminal acquisition auxiliary device, makes up for the requirements of non-intelligent pulse meter metering and signal detection which are not completely intelligent meters in intelligent meter reading system equipment, can assist the factory detection and field debugging of the pulse acquisition terminal and the semaphore detector, and plays an important role. Therefore, the utility model provides a take signal generator of infrared window.

SUMMERY OF THE UTILITY MODEL

To the problem among the correlation technique, the utility model provides a take signal generator of infrared window, it takes infrared window, carries out on-the-spot pulse signal's detection and configuration with the help of maintenance equipment such as lander palm, is that an important function is perfect and improve.

Therefore, the utility model discloses a specific technical scheme as follows:

a signal generator with an infrared window is a terminal acquisition auxiliary device of an intelligent meter reading system in a full-automatic or semi-automatic meter reading mode and comprises a signal generator body, wherein the signal generator body comprises an input/output unit and a signal processing unit electrically connected with the input/output unit, the input/output unit is arranged on a shell of the signal generator body, the signal processing unit is arranged in the signal generator body, the input/output unit comprises an uplink interface and a downlink interface, and the signal processing unit comprises a central processing unit and a ferroelectric memory electrically connected with the central processing unit;

the uplink interface comprises an RS-485 bus interface, an infrared window, an RS-232 interface and a USB interface, the infrared window is arranged on the surface of the signal generator body, a plurality of signal indicating lamps are arranged on one side of the infrared window, the RS-485 bus interface is arranged on one side of the signal generator body, the RS-232 interface is arranged on the other side of the signal generator body, the USB interface is arranged on one side of the RS-232 interface, and a power socket interface is arranged on one side of the USB interface, which is far away from the RS-232 interface;

the downlink interface comprises two groups of pulse signal generation output interfaces which are horizontally arranged, the pulse signal generation output interfaces are positioned on one side of the RS-485 bus interface, the pulse signal generation output interfaces comprise 12 paths of pulse signal generation output, and the pulse signal generation output interfaces are driven and output through triodes.

Furthermore, in order to facilitate the installation of the signal generator body, the bottom corners of the signal generator body are provided with hanging holes.

Furthermore, in order to record pulse data before power-off and ensure accurate data by powering off while being erased for unlimited times, the model of the central processing is PIC1F46K22I/PT, and the model of the ferroelectric memory is FM24C 64.

Furthermore, in order to achieve the lightning protection effect, the RS-485 bus interface adopts a lightning protection design, and current limiting protection is performed through a PTC JK250-120U self-recovery fuse.

Further, for convenience of local maintenance, the input of the infrared window is 38KHz modulation, NRZ coding, and the input rate of the infrared window is 19200 bps.

Further, for convenience of local maintenance, the USB interface is a virtual serial port, and the input rates of the USB interface and the RS-232 interface are both 19200 bps.

The utility model has the advantages that: by flexibly collocating various input sources and providing one-to-one service for testing the pulse acquisition terminal, the signal generator can realize full coverage of the test of the pulse acquisition terminal.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of an internal structure of a signal generator with an infrared window according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a surface of a housing in a signal generator with an infrared window according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a bottom of a housing in a signal generator with an infrared window according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a left side plate of a housing in a signal generator with an infrared window according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a right side plate of a housing in a signal generator with an infrared window according to an embodiment of the present invention;

fig. 6 is a schematic circuit diagram of a central processing unit in a signal generator with an infrared window according to an embodiment of the present invention;

fig. 7 is a schematic circuit diagram of a USB interface and an RS-232 interface in a signal generator with an infrared window according to an embodiment of the present invention;

fig. 8 is a schematic circuit diagram of an RS-485 interface input in a signal generator with an infrared window according to an embodiment of the present invention;

fig. 9 is a schematic circuit diagram of a pulse memory in a signal generator with an infrared window according to an embodiment of the present invention;

fig. 10 is a schematic circuit diagram of an infrared input in a signal generator with an infrared window according to an embodiment of the present invention.

In the figure:

1. a signal generator body; 2. hanging holes; 3. a central processing unit; 4. a ferroelectric memory; 5. an RS-485 bus interface; 6. an infrared window; 7. an RS-232 interface; 8. a USB interface; 9. a signal indicator light; 10. a power socket interface; 11. and a pulse signal generation output interface.

Detailed Description

For further explanation of the embodiments, the drawings are provided as part of the disclosure and serve primarily to illustrate the embodiments and, together with the description, to explain the principles of operation of the embodiments, and to provide further explanation of the invention and advantages thereof, it will be understood by those skilled in the art that various other embodiments and advantages of the invention are possible, and that elements in the drawings are not to scale and that like reference numerals are generally used to designate like elements.

According to the utility model discloses an embodiment provides a take signal generator of infrared window.

The invention will now be further described with reference to the accompanying drawings and specific embodiments, as shown in figures 1-10, the signal generator with the infrared window according to the embodiment of the utility model comprises a terminal acquisition auxiliary device of an intelligent meter reading system in a full-automatic or semi-automatic meter reading mode, it is characterized by comprising a pulse signal generator body 1 and is characterized in that the pulse signal generator body 1 comprises an input and output unit and a signal processing unit electrically connected with the input and output unit, the input and output unit is arranged on the shell of the pulse signal generator body 1, the signal processing unit is arranged in the pulse signal generator body 1, the input/output unit comprises an uplink interface and a downlink interface, and the signal processing unit comprises a central processing unit 3 and a ferroelectric memory 4 electrically connected with the central processing unit;

the uplink interface comprises an RS-485 bus interface 5, an infrared window 6, an RS-232 interface 7 and a USB interface 8, the infrared window 6 is arranged on the surface of the pulse signal generator body 1, and one side of the infrared window 6 is provided with a plurality of signal indicator lamps 9, one side of the pulse signal generator body 1 is provided with the RS-485 bus interface 5, the RS-232 interface 7 is arranged on the other side of the pulse signal generator body 1, the USB interface 8 is arranged on one side of the RS-232 interface 7, and one side of the USB interface 8, which is far away from the RS-232 interface 7, is provided with a power socket interface 10, the downlink interface comprises two groups of pulse signal generation output interfaces 11 which are horizontally arranged, and the pulse signal generation output interface 11 is positioned at one side of the RS-485 bus interface 5. In specific application, MAX487E is adopted to realize RS-485 input, MAX202CSE is adopted as RS-232 input, PL2303HX is adopted as USB input, and MCP2120 is adopted as infrared input. And selecting whether external power supply or acquisition terminal power supply is available. The utility model provides a new technology that a plurality of trades do not appear enriches signal generator's the interface mode of going upward and interface mode down, analogizes out some new models.

Specifically, the current behavior is RS-485. The signal generator can only supply power locally, and can not supply power remotely through an RS-485 bus. The signal generator is not divided into a low power consumption mode and a high power consumption mode. The infrared window, the RS-232 and the USB are always effective, and the main control chip always runs at a higher frequency.

When the device is used as an infrared window, the device is mainly convenient for on-site palm machine debugging. In the past, an infrared panel is additionally arranged on a pulse acquisition terminal for debugging, or a palm machine is externally connected with a patch cord and a 232 or USB adapter for maintaining the terminal, the adapter needs external power supply, and electricity is stolen through a serial port, but the palm machine is limited in external power supply capacity, the output of a new palm machine is 3.3V instead of 5V, and external power supply is not feasible. The signal generator is an auxiliary device of a pulse acquisition terminal and a semaphore detector, and the design principle is similar to bypass, so the same problems and conditions exist. It is therefore desirable to design an integrated device with an infrared window. The infrared window has non-contact, and the interface is difficult to ageing, and the direction selection scope is big, does benefit to remote operation (3 meters effect, 10 meters at most, just for the long-range of contact, it is not far away in fact, but the practicality is still very strong).

The current behavior is RS-232 and USB. The uplink design supports both RS-232 and USB interfaces. Because of the popularity and convenience of USB and RS-232, RS-232 is frequently standardized as industrial equipment, and the RS-232 is gradually replaced by the USB at present, but the RS-232 is more reliable in reliability than the USB, the USB is more convenient for temporary maintenance, particularly notebook carrying field maintenance, long-term connection or long-term test special, or the RS-232 is more reliable and stable, so that the signal generator is designed to support the RS-232 and the USB at the same time.

The downlink interface comprises 12 paths of pulse signal generation output, and the output is driven by a 9013 triode, so that whether active output or passive output is available or not can be selected (a collector electrode external pull-up mode). And the 12 paths of output pulse signals are divided into two groups, and each group has 6 paths. Either only one of the sets may be used, or two sets may be used to connect the pulse acquisition terminals or the semaphore detectors. The power supply of this embodiment is DC 12V/1A. The pulse signal completes a complete pulse period through high-low change, the jitter removal processing is carried out for 50ms, the 5V selectable power supply outputs, the pulse signal is detected to be high level above 4V, low level below 2V and fuzzy level between 2V and 4V, the arbitration decision is carried out through software for multiple averaging, and the alarm prompt is given.

By means of the technical scheme, the pulse acquisition terminal is tested in a full coverage mode by the signal generator through flexibly matching various input sources and giving one-to-one service for testing the pulse acquisition terminal.

In one embodiment, the bottom corners of the pulse signal generator body 1 are provided with hanging holes 2. By so arranging, the installation of the pulse signal generator body 1 is facilitated.

In one embodiment, the central processing unit is of a type PIC1F46K22I/PT, the ferroelectric memory 4 is of a type FM24C64, and pulse data before power failure can be recorded while power failure is carried out for unlimited times by storing pulse signals by using the FM24C64 ferroelectric memory 4, so that accurate data is ensured.

In one embodiment, the RS-485 bus interface 5 adopts a lightning protection design, current limiting protection is carried out through a PTC JK250-120U self-recovery fuse, and transient lightning stroke protection is carried out by using a transient suppression diode SA15 and a discharge tube BAS 2600N. In specific application, protection of an RS-485 input power supply is independently processed, three wires including a ground wire and two signal wires A and B of the RS-485 are used for common-mode and differential-mode protection, the differential mode is between the A and the B, the common mode is between the A and the ground, and the B and the ground. Signal lines A and B are subjected to current limiting protection through PTC JK250-120U self-recovery fuses (lightning transient is prevented from generating large current to pass through, internal current is protected, current which cannot pass through is released through BS 2600N), a small amount of instant large current passing through PTC is released through SA15 transient suppression diodes, safety of an internal circuit is guaranteed, under the extreme condition, elements can be protected from being damaged, the fact that the internal elements are not damaged is also guaranteed, and replacement cost of the elements is reduced. The RS-485 input is simultaneously provided with a pull-up and pull-down resistor, so that the electrical level can be accurate when the bus is not input.

In one embodiment, the input of the infrared window 6 is 38KHz modulation, NRZ coding, and the input rate of the infrared window 6 is 19200bps, so that the high speed is convenient for local maintenance.

In one embodiment, the USB interface 8 is a virtual serial port, and the input rates of the USB interface 8 and the RS-232 interface 7 are both 19200bps, which is high-speed and facilitates local maintenance.

Wherein the circuit schematic diagram of the signal generator is shown in fig. 6-10:

FIG. 6 is a schematic diagram of a CPU circuit of the signal generator. The PIC18F46K22I/PT is an 8-bit high-performance MCU designed and produced by Microchip American Microchip corporation, a 44-pin QFP package, a 64KB memory, a maximum frequency of 64MHz, 28 AD conversion channels and 8-bit or 16-bit sampling.

FIG. 7 is a schematic diagram of the USB and RS-232 circuits of the signal generator, the USB chip employs PL2303HX, and the RS-232 employs MAX202 CSE.

FIG. 8 is a circuit schematic of the RS-485 input of the signal generator, with the RS-485 chip using MAX 487E.

Fig. 9 is a schematic diagram of a pulse memory circuit for a signal generator using FM24C64 ferroelectric memory. The power down data retention feature of this chip is used here.

Fig. 10 is a circuit schematic of the infrared input of the signal generator. MCP2120, which is also an infrared driving chip designed and produced by Microchip American Microchip corporation, is adopted, and is packaged in a 14-pin SO (SO) mode, namely, a double-row patch package.

The utility model discloses there is the prototype to support above-mentioned design. The signal generator for generating and outputting the pulse signals of the uplink RS-485 and infrared windows, the RS-232 and USB and the downlink 12 paths is used as an important auxiliary device of the intelligent meter reading system (although the auxiliary device is important, because the acquisition terminals have a plurality of channels and a plurality of items to be detected, and only manual detection is easy to omit and lose without the help of the auxiliary detection device, the signal generator is important, and products related to the quality and quality of the products are very important products). With the change of the consumption requirements of users, particularly the new requirements of systems, a signal generator adopting new communication technology and means becomes necessary in the intelligent meter reading industry, and is popular with users.

To sum up, with the help of the above technical scheme of the utility model, through arranging multiple input source in a flexible way to give the one-to-one service of pulse acquisition terminal test, realize signal generator to the test full coverage at pulse acquisition terminal.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A signal generator with an infrared window is a terminal acquisition auxiliary device of an intelligent meter reading system in a full-automatic or semi-automatic meter reading mode, and is characterized by comprising a signal generator body (1), wherein the signal generator body (1) comprises an input/output unit and a signal processing unit electrically connected with the input/output unit, the input/output unit is arranged on a shell of the signal generator body (1), the signal processing unit is arranged in the signal generator body (1), the input/output unit comprises an uplink interface and a downlink interface, and the signal processing unit comprises a central processing unit (3) and a ferroelectric memory (4) electrically connected with the central processing unit;

the uplink interface comprises an RS-485 bus interface (5), an infrared window (6), an RS-232 interface (7) and a USB interface (8), the infrared window (6) is arranged on the surface of the signal generator body (1), a plurality of signal indicating lamps (9) are arranged on one side of the infrared window (6), the RS-485 bus interface (5) is arranged on one side of the signal generator body (1), the RS-232 interface (7) is arranged on the other side of the signal generator body (1), the USB interface (8) is arranged on one side of the RS-232 interface (7), a power socket interface (10) is arranged on one side, far away from the RS-232 interface (7), of the USB interface (8), the downlink interface comprises 12 paths of pulse signals for output, and the output of the 12 paths of pulse signals is divided into two groups, each group comprises 6 paths.

2. The signal generator with the infrared window as claimed in claim 1, wherein the signal generator body (1) is provided with hanging holes (2) at the bottom corners.

3. The signal generator with an infrared window according to claim 1, characterized in that the central processing has a model of PIC1F46K22I/PT and the ferroelectric memory (4) has a model of FM24C 64.

4. The signal generator with the infrared window as claimed in claim 1, wherein the RS-485 bus interface (5) is designed for lightning protection, and current limiting protection is performed by a PTC JK250-120U self-recovery fuse.

5. The signal generator with infrared window as claimed in claim 1, wherein the input of the infrared window (6) is 38KHz modulated, NRZ encoded, and the input rate of the infrared window (6) is 19200 bps.

6. The signal generator with the infrared window as claimed in claim 1, wherein the USB interface (8) is a virtual serial port, and the input rates of the USB interface (8) and the RS-232 interface (7) are each 19200 bps.