Main control circuit board of itinerant detector

Abstract

The main control circuit board of the inspection instrument is suitable for detecting a storage battery in a power supply system and comprises a decoder, an optoelectronic isolator and a voltage sampling terminal, the decoder is electrically connected with the optoelectronic isolator, and the optoelectronic isolator is electrically connected with the voltage sampling terminal; the optoelectronic isolator comprises a light emitting diode and a photoelectric transistor; a preset isolation distance is arranged between the light-emitting diodes and the phototransistors, and the number of the light-emitting diodes is equal to that of the phototransistors; the cathode of the light-emitting diode is electrically connected with the decoder, and the anode of the light-emitting diode is electrically connected with the decoder; the base of the phototransistor detects the light of the light emitting diode and converts the light energy into electric energy; the collector electrode of the photoelectric transistor is electrically connected with the voltage sampling terminal, and the emitter electrode of the photoelectric transistor is grounded. According to the main control circuit board of the itinerant detector, the connection mode of the internal circuit is simple, an operator can detect the storage battery to be detected easily, and the main control circuit board of the itinerant detector is not prone to damage.

Description

Technical Field

[0001] The present application relates to the technical field of battery inspection instruments, and in particular to a main control circuit board of an inspection instrument. Background Art

[0002] The battery inspection instrument is a device for inspecting the battery pack in the power system. The battery inspection instrument can measure and record the voltage, internal resistance and temperature of the battery cells in real time. At present, the battery inspection instrument has been widely used in the management of power systems in related industries such as energy, communications, finance and transportation.

[0003] When the battery tester used in daily life measures the battery voltage, once the tested battery is short-circuited, the instantaneous high voltage of the tested battery will impact the tester, causing damage to the battery tester or even scrapping it. Utility Model Content

[0004] In view of this, the present application proposes a main control circuit board of an inspection instrument to solve the above problems.

[0005] According to one aspect of the present application, a main control circuit board of a patrol inspection instrument is provided, which is suitable for detecting a battery in a power supply system, and includes: a decoder, a photoelectric isolator and a voltage sampling terminal; the decoder is electrically connected to the photoelectric isolator, and the photoelectric isolator is electrically connected to the voltage sampling terminal;

[0006] The photoelectric isolator comprises: a light emitting diode and a phototransistor; a preset isolation distance is set between the light emitting diode and the phototransistor; the number of the light emitting diodes is equal to the number of the phototransistors;

[0007] The cathode of the light emitting diode is electrically connected to the decoder, and the anode of the light emitting diode is electrically connected to the decoder;

[0008] The base of the phototransistor detects the light of the light emitting diode and converts the light energy into electrical energy;

[0009] The collector of the phototransistor is electrically connected to the voltage sampling terminal, and the emitter of the phototransistor is grounded.

[0010] In a possible implementation, the device further includes: a resistor; one end of the resistor is electrically connected to the input end of the voltage sampling terminal, and the other end of the resistor is electrically connected to the collector of the phototransistor.

[0011] In a possible implementation, each of the light emitting diodes is electrically connected to an output pin of the decoder in a one-to-one correspondence, and each of the phototransistors is electrically connected to an input pin of the voltage sampling terminal in a one-to-one correspondence.

[0012] In a possible implementation, the decoder has a common cathode digital tube group; the cathode of the common cathode digital tube group is electrically connected to the output end of the decoder, and the anode of the common cathode digital tube group is electrically connected to the cathode of the light-emitting diode respectively; specifically, the common cathode digital tube group is a plurality of diodes whose cathodes are connected together as a common end, and the anodes of the plurality of diodes are free ends.

[0013] In a possible implementation, the device further includes: a capacitor; one end of the capacitor is electrically connected to the VCC pin of the decoder, and the other end of the capacitor is grounded.

[0014] In one possible implementation, the number of diodes in the common cathode digital tube group is four, wherein the cathodes of two of the diodes are electrically connected to an output pin of the decoder; the cathodes of the remaining two diodes are electrically connected to another output pin of the same decoder; and the anodes of the four diodes are electrically connected to the cathodes of different light-emitting diodes in a one-to-one correspondence.

[0015] In a possible implementation manner, the number of the light emitting diodes and the number of the phototransistors in the same photoisolator are two; and the light emitting diodes and the phototransistors in the photoisolator are arranged relatively in parallel.

[0016] In a possible implementation, the decoder pins, the decoder pins, the decoder pins, the decoder pins, the decoder pins, the decoder pins, the decoder pins, and the decoder The pins are all output terminals of the decoder.

[0017] In a possible implementation, the OE1 pin of the decoder, the pins and the decoder The pins are all enable input terminals of the decoder; the A pin of the decoder, the B pin of the decoder and the C pin of the decoder are input terminals of the decoder.

[0018] In a possible implementation, the model of the decoder is 74HC138; the light emitting diode is a near-infrared light emitting diode; the model of the voltage sampling terminal is J202, and the model of the voltage sampling terminal is J201.

[0019] Beneficial effects of this application:

[0020] The main control circuit board of the inspection instrument proposed in the present application has a simple connection mode of the internal circuit, which is easy for operators in this field to detect the voltage and other information of the battery in real time, and compared with other inspection instruments, the main control circuit board of the inspection instrument of the present application is not easy to cause damage to the inspection instrument. Specifically, by adding a photoelectric isolator, the photoelectric isolator is composed of a light-emitting diode and a phototransistor. Among them, an isolation distance is set between the light-emitting diode and the phototransistor, so that the battery to be detected is physically isolated from the key components of the inspection instrument. Secondly, the base of the phototransistor can receive the light emitted by the light-emitting diode, and convert the light energy into electrical energy, and enter the detection circuit of the battery. More specifically, the cathode of the light-emitting diode is electrically connected to the decoder, and the anode of the light-emitting diode is electrically connected to the decoder. The base of the phototransistor detects the light of the light-emitting diode and converts the light energy into electrical energy. The collector of the phototransistor is electrically connected to the voltage sampling terminal, and the emitter of the phototransistor is grounded. Therefore, even if the tested battery is short-circuited, the instantaneous high voltage will not cause an impact on the inspection instrument, thereby extending the service life of the inspection instrument and improving the utilization rate of the inspection instrument.

[0021] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and, together with the description, serve to explain the principles of the present application.

[0023] Figure 1 A partial circuit diagram of the main control circuit board of the inspection instrument according to an embodiment of the present application is shown;

[0024] Figure 2 A schematic diagram showing a voltage sampling terminal of a main control circuit board of a patrol inspection instrument according to an embodiment of the present application;

[0025] Figure 3 A schematic diagram showing the structure of the photoelectric isolator of the main control circuit board of the inspection instrument according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0026] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0027] Among them, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application or simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0030] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0031] like Figure 1 , Figure 2 and Figure 3 As shown, the main control circuit board of the inspection instrument is suitable for detecting the battery in the power supply system, including: a decoder 100, a photoelectric isolator 200 and a voltage sampling terminal 300; the decoder 100 is electrically connected to the photoelectric isolator 200, and the photoelectric isolator 200 is electrically connected to the voltage sampling terminal 300. The photoelectric isolator 200 includes: a light-emitting diode 210 and a phototransistor 220; a preset isolation distance is set between the light-emitting diode 210 and the phototransistor 220; the number of the light-emitting diodes 210 is equal to the number of the phototransistors 220. The cathode of the light-emitting diode 210 is electrically connected to the decoder 100, and the anode of the light-emitting diode 210 is electrically connected to the decoder 100. The base of the phototransistor 220 detects the light of the light-emitting diode 210 and converts the light energy into electrical energy. The collector of the phototransistor 220 is electrically connected to the voltage sampling terminal 300, and the emitter of the phototransistor 220 is grounded.

[0032] The main control circuit board of the inspection instrument proposed in this embodiment has a simple connection method of the internal circuit, which is easy for operators in this field to detect the voltage and other information of the battery in real time, and compared with other inspection instruments, the main control circuit board of the inspection instrument of this application is not easy to cause damage to the inspection instrument. Specifically, by adding a photoelectric isolator 200, the photoelectric isolator 200 is composed of a light-emitting diode 210 and a phototransistor 220. Among them, an isolation distance is set between the light-emitting diode 210 and the phototransistor 220, so that the battery to be detected is physically isolated from the key components of the inspection instrument. Secondly, the base of the phototransistor 220 can receive the light emitted by the light-emitting diode 210, and convert the light energy into electrical energy, and enter the detection circuit of the battery. Therefore, even if the tested battery is short-circuited, the instantaneous high voltage will not cause an impact on the inspection instrument, thereby extending the service life of the inspection instrument and improving the utilization rate of the inspection instrument. More specifically, the light-emitting diode 210 converts the electrical input signal into light, the phototransistor 220 detects the incident light, and generates corresponding electrical energy according to the incident light.

[0033] In one of the specific embodiments, it also includes: a resistor 400; one end of the resistor 400 is electrically connected to the input end of the voltage sampling terminal 300, and the other end of the resistor 400 is electrically connected to the collector of the phototransistor 220. In this embodiment, it should be noted that by setting the resistor 400 between the detection circuits, the high input impedance is reduced, and the interference of the inspection meter in the battery sampling voltage detection process is filtered. When measuring the voltage of the battery, the traditional inspection meter is prone to interference and cannot obtain accurate measurement data. In comparison, the inspection meter of the present application effectively filters interference by setting the resistor 400, can more accurately detect the battery to be detected, and the data obtained is more accurate.

[0034] In one specific embodiment, each light emitting diode 210 is electrically connected to an output pin of the decoder 100 in a one-to-one correspondence, and each phototransistor 220 is electrically connected to an input pin of the voltage sampling terminal 300 in a one-to-one correspondence.

[0035] In one specific embodiment, the decoder 100 has a common cathode digital tube 110; the cathode of the common cathode digital tube 110 is electrically connected to the output end of the decoder 100, and the anode of the common cathode digital tube 110 is electrically connected to the cathode of the light-emitting diode 210; specifically, the common cathode digital tube 110 is a plurality of diodes whose cathodes are connected together as a common end, and the anodes of the plurality of diodes are free ends. In this embodiment, it should be noted that the common end of the diode is the cathode, and the digital tube lights up when the anode is added. That is, when the true value is 1, the digital tube lights up; when the true value is 0, the digital tube does not light up. The inspection instrument can intuitively detect the voltage condition of the battery to be inspected.

[0036] In one specific embodiment, it further includes: a capacitor 500; one end of the capacitor 500 is electrically connected to the VCC pin of the decoder 100, and the other end of the capacitor 500 is grounded. In this embodiment, it should be noted that, on the one hand, the capacitor 500 effectively stabilizes the power supply voltage and improves the working stability of the decoder 100. At the same time, the capacitor 500 is set to filter the power supply voltage, filter out the clutter and AC components of the power supply, and the electrical signal sent to the light emitting diode 210 is cleaner.

[0037] In one specific embodiment, the number of diodes in the common cathode digital tube 110 is four, wherein the cathodes of two diodes are electrically connected to an output pin of the decoder 100; the cathodes of the remaining two diodes are electrically connected to another output pin of the same decoder 100; and the anodes of the four diodes are electrically connected to the cathodes of different light-emitting diodes 210 in a one-to-one correspondence. In this embodiment, it should be noted that it is convenient for the inspection instrument to detect multiple batteries to be detected at the same time, thereby improving the efficiency of detecting batteries. The information obtained simultaneously between multiple batteries to be detected is not easily confused.

[0038] In one specific embodiment, the number of light emitting diodes 210 and the number of phototransistors 220 in the same photoelectric isolator 200 are two; the light emitting diodes 210 and the phototransistors 220 in the photoelectric isolator 200 are arranged in parallel. In this embodiment, it should be noted that the photoelectric isolator 200 is part of the isolation circuit, which physically isolates the decoder 100 from the voltage sampling terminal 300, prevents the battery from short-circuiting, and prevents instantaneous high voltage from impacting the inspection meter, effectively extending the service life of the inspection meter of the present application.

[0039] In one specific embodiment, the decoder 100 Pin, decoder 100 Pin, decoder 100 Pin, decoder 100 Pin, decoder 100 Pin, decoder 100 Pin, decoder 100 pins, and decoder 100 The pins are all output terminals of the decoder 100 .

[0040] In one specific embodiment, the OE1 pin of the decoder 100 and the pins and decoder 100 The pins are all enable input terminals of the decoder 100 ; the A pin of the decoder 100 , the B pin of the decoder 100 , and the C pin of the decoder 100 are input terminals of the decoder 100 .

[0041] In one specific embodiment, the model of the decoder 100 is 74HC138; the light emitting diode 210 is a near-infrared light emitting diode 210; the model of the voltage sampling terminal 300 is J202, and the model of the voltage sampling terminal 300 is J201.

[0042] In summary, it should be noted that the decoder 100 translates each input binary code into a corresponding output high and low level signal. The 74HC138 decoder 100 is a high-speed CMOS device, and the 74HC138 pins are compatible with the low-power Schottky TTL (LSTTL) series. The 74HC138 decoder 100 can accept a 3-bit binary weighted address input (pin A, pin B, and pin C), and when enabled, provides 8 mutually exclusive low-effective outputs ( Pin to pin). The 74HC138 decoder 100 has three enable inputs: two low active ( and ) and an active high OE1. Unless ( and ) is set low and OE1 is set high, otherwise the 74HC138 will keep all outputs high. It should also be noted that the decoder 100 Pin to decoder 100 The output level of the pin is determined by the OE1 pin of the decoder 100, the Pin, decoder 100 It is determined by the A pin of decoder 100, the B pin of decoder 100 and the C pin of decoder 100.

[0043] It should also be noted that Figure 1 This is a partial circuit diagram of the inspection instrument main control board. There are three voltage sampling terminals 300 in the figure, one of which is J202, and the number of pins of J202 voltage sampling terminal 300 is 5. The other two voltage sampling terminals 300 are J201, and the number of pins of J201 voltage sampling terminal 300 is 10. There are three decoders in the figure, and the model of the three decoders is preferably 74HC138.

[0044] It should be noted that although the present application is described as an example of the inspection instrument main control circuit board, those skilled in the art will appreciate that the present application should not be limited thereto. In fact, the user can flexibly set parameters according to personal preferences and / or actual application scenarios, as long as they are reasonable.

[0045] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A main control circuit board of a patrol inspection instrument, characterized in that: Suitable for detecting batteries in a power supply system, comprising: a decoder, a photoelectric isolator and a voltage sampling terminal; the decoder is electrically connected to the photoelectric isolator, and the photoelectric isolator is electrically connected to the voltage sampling terminal; The photoelectric isolator comprises: a light emitting diode and a phototransistor; a preset isolation distance is set between the light emitting diode and the phototransistor, and the number of the light emitting diodes is equal to the number of the phototransistors; The cathode of the light emitting diode is electrically connected to the decoder, and the anode of the light emitting diode is electrically connected to the decoder; The base of the phototransistor detects the light of the light emitting diode and converts the light energy into electrical energy; The collector of the phototransistor is electrically connected to the voltage sampling terminal, and the emitter of the phototransistor is grounded.

2. The inspection instrument main control circuit board according to claim 1, characterized in that: Also includes: resistance; One end of the resistor is electrically connected to the input end of the voltage sampling terminal, and the other end of the resistor is electrically connected to the collector of the phototransistor.

3. The inspection instrument main control circuit board according to claim 1, characterized in that: Each of the light emitting diodes is electrically connected to an output pin of the decoder in a one-to-one correspondence, and each of the phototransistors is electrically connected to an input pin of the voltage sampling terminal in a one-to-one correspondence.

4. The inspection instrument main control circuit board according to claim 1, characterized in that: The decoder has a common cathode digital tube group; the cathode of the common cathode digital tube group is electrically connected to the output end of the decoder, and the anode of the common cathode digital tube group is electrically connected to the cathode of the light-emitting diode respectively; specifically, the cathodes of the common cathode digital tube group are connected together as a common end, and the anodes of the multiple diodes are free ends.

5. The inspection instrument main control circuit board according to claim 1, characterized in that: Also includes: Capacitor; one end of the capacitor is electrically connected to the VCC pin of the decoder, and the other end of the capacitor is grounded.

6. The main control circuit board of the inspection instrument according to claim 4, characterized in that: The number of diodes in the common cathode digital tube group is four, wherein the cathodes of two of the diodes are electrically connected to an output pin of the decoder; the cathodes of the remaining two diodes are electrically connected to another output pin of the same decoder; and the anodes of the four diodes are electrically connected to the cathodes of different light-emitting diodes in a one-to-one correspondence.

7. The inspection instrument main control circuit board according to any one of claims 1 to 5, characterized in that: The number of the light emitting diodes and the number of the phototransistors in the same photoelectric isolator are two; the light emitting diodes and the phototransistors in the photoelectric isolator are arranged relatively in parallel.

8. The main control circuit board of the inspection instrument according to claim 7, characterized in that: The decoder pins, the decoder pins, the decoder pins, the decoder pins, the decoder pins, the decoder pins, the decoder pins, and the decoder The pins are all output terminals of the decoder.

9. The main control circuit board of the inspection instrument according to claim 8, characterized in that: The OE1 pin of the decoder, the pins and the decoder The pins are all enable input terminals of the decoder; the A pin of the decoder, the B pin of the decoder and the C pin of the decoder are input terminals of the decoder.

10. The main control circuit board of the inspection instrument according to claim 9, characterized in that: The model of the decoder is 74HC138; the light emitting diode is a near-infrared light emitting diode; the model of the voltage sampling terminal is J202, and the model of the voltage sampling terminal is J201.

Images