CN220490087U - Analog current output circuit and measuring grating - Google Patents
Analog current output circuit and measuring grating Download PDFInfo
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- CN220490087U CN220490087U CN202321845083.5U CN202321845083U CN220490087U CN 220490087 U CN220490087 U CN 220490087U CN 202321845083 U CN202321845083 U CN 202321845083U CN 220490087 U CN220490087 U CN 220490087U
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- 239000003990 capacitor Substances 0.000 claims description 25
- 230000005669 field effect Effects 0.000 claims description 22
- 108010037490 Peptidyl-Prolyl Cis-Trans Isomerase NIMA-Interacting 4 Proteins 0.000 claims description 20
- 102100031653 Peptidyl-prolyl cis-trans isomerase NIMA-interacting 4 Human genes 0.000 claims description 20
- 101100190527 Arabidopsis thaliana PIN5 gene Proteins 0.000 claims description 13
- 101100190529 Arabidopsis thaliana PIN7 gene Proteins 0.000 claims description 11
- 101150087393 PIN3 gene Proteins 0.000 claims description 9
- 101100190530 Arabidopsis thaliana PIN8 gene Proteins 0.000 claims description 7
- 101100190528 Arabidopsis thaliana PIN6 gene Proteins 0.000 claims description 6
- 101150011456 PIN8 gene Proteins 0.000 claims description 6
- 108010033711 Telomeric Repeat Binding Protein 1 Proteins 0.000 claims description 6
- 102000007315 Telomeric Repeat Binding Protein 1 Human genes 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 4
- 101100244014 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) ppi-5 gene Proteins 0.000 claims description 3
- 101150023294 PIN4 gene Proteins 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000008859 change Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model relates to the technical field of measuring gratings, in particular to an analog current output circuit and a measuring grating. The analog current output circuit comprises an analog chip and a protection circuit, wherein the protection circuit is connected to the analog chip, the chip burning out caused by the wrong connection of the pins of the chip is further avoided, the analog chip is effectively protected, the output circuit is simple in structure, good in protection effect and easy to realize, meanwhile, the cost is low, and the running stability of a measuring grating is greatly improved.
Description
Technical Field
The utility model relates to the technical field of measuring gratings, in particular to an analog current output circuit and a measuring grating.
Background
The measuring grating is an electronic device for sensing the change of the received light intensity, and comprises an optical system, an amplifier, a switching value output device and the like. When the detected object passes through, the photoelectric sensor emits light, and the object or the light is absorbed or reflected to the light receiver of the photoelectric sensor according to different detection modes, so that the intensity of the light received by the light receiver changes, and the change value triggers the switch signal output to realize the detection function.
In the prior art, the analog quantity is usually output in the form of current or voltage, when the analog quantity is output in the form of current, the positive and negative poles of the power supply are easily connected to the output wire of the output chip, the positive pole wire of the power supply is easily connected to the negative pole wire of the grating or the negative pole wire of the power supply is easily connected to the output wire of the output chip by a user in the installation process of the grating, and the excessive input of voltage is caused by the incorrect connection of the circuit, so that the chip is easily burnt out.
Disclosure of Invention
The utility model provides an analog current output circuit and a measuring grating, which are used for solving the problem that chips are burnt out easily due to incorrect connection of pins of the measuring grating in the prior art.
In order to solve the above problems, in a first aspect, the present utility model provides an analog current output circuit, comprising:
the analog quantity chip is used for converting the PWM duty ratio provided by the measuring grating MCU into a corresponding output current value, the analog quantity chip comprises a PIN PIN4 and a PIN PIN7, the PIN PIN4 is a power supply positive electrode PIN, and the PIN PIN7 is a current output PIN;
the protection circuit comprises a field effect tube GL14P04-8, a fuse F1, a TVS tube D5 and a capacitor C57, wherein the PINs 1, 2 and 3 of the field effect tube GL14P04-8 are simultaneously connected with the PIN PIN7, the PIN4 of the field effect tube GL14P04-8 is connected with the PIN PIN4, one end of the TVS tube D5 is simultaneously connected with the PINs 5, 6, 7 and 8 of the field effect tube GL14P04-8, the other end of the TVS tube D5 is grounded, the fuse F1 is connected with one end of the capacitor C57 in series, the other end of the capacitor C57 is grounded, and the PINs 5, 6, 7 and 8 of the field effect tube GL14P04-8 are simultaneously connected between the fuse F1 and the capacitor C57.
In one possible implementation manner, preferably, the protection circuit further includes a TVS tube DZ2, one end of the TVS tube DZ2 is connected to the PIN4, and the other end of the TVS tube DZ2 is connected to the PIN4 of the field effect tube GL14P 04-8.
In one possible implementation manner, preferably, the protection circuit further includes a resistor R63 and a capacitor C56, one end of the resistor R63 is connected to one end of the capacitor C56, the pin4 of the field effect transistor GL14P04-8 is connected between the resistor R63 and the capacitor C56, the other end of the resistor R63 is grounded, and the other end of the capacitor C56 is grounded.
In one possible implementation, preferably, the analog chip further includes a PIN2, where PIN2 is an alarm PIN.
In one possible embodiment, preferably, the analog chip further includes a PIN3, where the PIN3 is an input PIN, and the PIN3 is used for inputting a PWM duty cycle.
In one possible implementation, preferably, the analog chip further includes a PIN5, where the PIN5 is a negative power supply PIN.
In one possible embodiment, the analog chip preferably further comprises a PIN6, the PIN6 selecting a PIN for the output current value.
In one possible embodiment, preferably, the analog chip further includes a PIN8, and the PIN8 is a 5V reference voltage output PIN.
In a second aspect, the utility model further provides a measurement grating, which comprises any one of the analog quantity current output circuits in the scheme.
The beneficial effects of the utility model are as follows: the utility model provides an analog current output circuit, which comprises: the analog quantity chip comprises a PIN PIN4 and a PIN PIN7, wherein the PIN PIN4 is a power supply positive electrode PIN, and the PIN PIN7 is a current output PIN; the protection circuit comprises a field effect transistor GL14P04-8, a fuse F1, a TVS tube D5 and a capacitor C57. The output circuit can effectively avoid the condition that the chip burns out when the chip pins are connected in a wrong way, has a simple structure, a good protection effect and easy realization, and is low in generation cost, and the running stability of the measuring grating can be greatly improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic diagram of the overall circuit configuration of an analog current output circuit.
Description of main reference numerals:
100-analog quantity chip; 200-a protection circuit.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
Referring to fig. 1, the present utility model provides an analog current output circuit (hereinafter referred to as an output circuit) that includes an analog chip 100 and a protection circuit 200, wherein the analog chip 100 is used for converting a PWM duty ratio provided by a measurement grating MCU (not shown in the drawings) into a corresponding output current value. The output circuit is used for simulating the output measuring grating STC-A, and adopts se:Sub>A current output mode to convert the object size detected by the measuring grating into se:Sub>A current value of 0-20mA or 4-20mA.
Specifically, the analog chip 100 is configured to convert the PWM duty ratio provided by the measurement grating MCU into a corresponding output current value, where the analog chip 100 includes a PIN4 and a PIN7, the PIN4 is a positive power supply PIN, and the PIN7 is a current output PIN.
The protection circuit 200 includes a field effect transistor GL14P04-8, a fuse F1, a TVS tube D5, and a capacitor C57, wherein the PINs 1, 2, and 3 of the field effect transistor GL14P04-8 are simultaneously connected to the PIN7 of the analog chip 100, the PIN4 of the field effect transistor GL14P04-8 is simultaneously connected to the PIN4 of the analog chip 100, one end of the TVS tube D5 is simultaneously connected to the PIN5, 6, 7, and 8 of the field effect transistor GL14P04-8, the other end of the TVS tube D5 is grounded, the fuse F1 is serially connected to one end of the capacitor C57, and the other end of the capacitor C57 is grounded, and the PINs 5, 6, 7, and 8 of the field effect transistor GL14P04-8 are simultaneously connected between the fuse F1 and the capacitor C57.
It should be explained that, in the process of installing the grating, if the user carelessly connects the positive electrode and the negative electrode of the power line to the analog output line, and connects the positive electrode of the power line to the negative electrode of the grating, the negative electrode of the power line is connected to the analog output line of the grating, and at this time, the fuse F1 and the TVS tube D5 form a protection circuit, so as to further prevent burning out the analog chip 100.
Further, in the grating installation process, if the user carelessly connects the positive line of the power line to the analog output line, the negative line of the power line is connected to the negative line of the power line of the grating, and at this time, the fuse F1 and the TVS tube D5 form a protection circuit, so that the voltage is clamped within 16V, and the analog chip 100 is prevented from being burnt.
The output circuit is simple in structure, good in protection effect and low in cost, and the running stability of the measuring grating is greatly improved.
With continued reference to fig. 1, on the basis of the above scheme, the protection circuit 200 further includes a TVS tube DZ2, one end of the TVS tube DZ2 is connected to the PIN4 of the analog chip 100, and the other end of the TVS tube DZ2 is connected to the PIN4 of the field effect transistor GL14P 04-8.
Preferably, the protection circuit 200 further includes a resistor R63 and a capacitor C56, wherein one end of the resistor R63 is connected to one end of the capacitor C56, the pin4 of the field effect transistor GL14P04-8 is connected between the resistor R63 and the capacitor C56, the other end of the resistor R63 is grounded, and the other end of the capacitor C56 is grounded.
Based on the above scheme, the analog chip 100 further includes PIN2, PIN3, PIN5, PIN6, and PIN8. Wherein PIN PIN2 is an alarm PIN; PIN3 is an input PIN, PIN3 is used for inputting PWM duty cycle; PIN5 is the negative power supply PIN; PIN6 is the output current value selection PIN; PIN8 is a 5V reference voltage output PIN.
In another preferred embodiment, analog chip 100 is a model GP8301 chip.
On the basis of the scheme, the utility model also provides a measuring grating which comprises any one of the output circuits in the scheme, namely the measuring grating comprising any one of the output circuits is within the scope of the utility model.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.
Claims (9)
1. An analog current output circuit, comprising:
the analog quantity chip is used for converting the PWM duty ratio provided by the measuring grating MCU into a corresponding output current value, the analog quantity chip comprises a PIN PIN4 and a PIN PIN7, the PIN PIN4 is a power supply positive electrode PIN, and the PIN PIN7 is a current output PIN;
the protection circuit comprises a field effect tube GL14P04-8, a fuse F1, a TVS tube D5 and a capacitor C57, wherein the PINs 1, 2 and 3 of the field effect tube GL14P04-8 are simultaneously connected with the PIN PIN7, the PIN4 of the field effect tube GL14P04-8 is connected with the PIN PIN4, one end of the TVS tube D5 is simultaneously connected with the PINs 5, 6, 7 and 8 of the field effect tube GL14P04-8, the other end of the TVS tube D5 is grounded, the fuse F1 is connected with one end of the capacitor C57 in series, the other end of the capacitor C57 is grounded, and the PINs 5, 6, 7 and 8 of the field effect tube GL14P04-8 are simultaneously connected between the fuse F1 and the capacitor C57.
2. The analog current output circuit according to claim 1, wherein the protection circuit further comprises a TVS tube DZ2, one end of the TVS tube DZ2 is connected to the PIN4, and the other end of the TVS tube DZ2 is connected to the PIN4 of the field effect transistor GL14P 04-8.
3. The analog current output circuit according to claim 1, wherein the protection circuit further comprises a resistor R63 and a capacitor C56, one end of the resistor R63 is connected to one end of the capacitor C56, the pin4 of the field effect transistor GL14P04-8 is connected between the resistor R63 and the capacitor C56, the other end of the resistor R63 is grounded, and the other end of the capacitor C56 is grounded.
4. The analog current output circuit of claim 1, wherein the analog chip further comprises a PIN2, the PIN2 being an alarm PIN.
5. The analog current output circuit according to claim 1, wherein the analog chip further comprises a PIN3, the PIN3 being an input PIN, the PIN3 being used for inputting a PWM duty cycle.
6. The analog current output circuit of claim 1, wherein the analog chip further comprises a PIN5, the PIN5 being a negative power supply PIN.
7. The analog current output circuit of claim 1, wherein the analog chip further comprises a PIN6, the PIN6 selecting a PIN for an output current value.
8. The analog current output circuit of claim 1, wherein the analog chip further comprises PIN8, the PIN8 being a 5V reference voltage output PIN.
9. A measurement grating comprising the analog current output circuit of any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321845083.5U CN220490087U (en) | 2023-07-14 | 2023-07-14 | Analog current output circuit and measuring grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321845083.5U CN220490087U (en) | 2023-07-14 | 2023-07-14 | Analog current output circuit and measuring grating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220490087U true CN220490087U (en) | 2024-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321845083.5U Active CN220490087U (en) | 2023-07-14 | 2023-07-14 | Analog current output circuit and measuring grating |
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| Country | Link |
|---|---|
| CN (1) | CN220490087U (en) |
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2023
- 2023-07-14 CN CN202321845083.5U patent/CN220490087U/en active Active
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