CN218679031U

CN218679031U - Encoder signal level conversion circuit

Info

Publication number: CN218679031U
Application number: CN202222025765.3U
Authority: CN
Inventors: 周恩会; 董庆玮
Original assignee: Jiangsu Shagang Group Co Ltd; Zhangjiagang Hongchang Steel Plate Co Ltd; Jiangsu Shagang Iron and Steel Research Institute Co Ltd
Current assignee: Jiangsu Shagang Group Co Ltd; Zhangjiagang Hongchang Steel Plate Co Ltd; Jiangsu Shagang Iron and Steel Research Institute Co Ltd
Priority date: 2022-08-03
Filing date: 2022-08-03
Publication date: 2023-03-21
Anticipated expiration: 2032-08-03

Abstract

The application relates to a signal level conversion circuit of an encoder, which comprises an HTL encoder, an HTL-TTL conversion circuit and a TTL counting interface board; the HTL encoder is used for inputting HTL signals to the HTL-TTL conversion circuit, the HTL-TTL conversion circuit is used for converting the HTL signals into TTL signals, and the TTL counting interface board is used for receiving the output TTL signals; the HTL-TTL conversion circuit comprises a power supply module and a signal conversion module, wherein the power supply module is used for supplying power to the signal conversion module, and the signal conversion module is used for converting an HTL signal into a TTL signal. The embodiment of the utility model provides an encoder signal conversion circuit has realized taking place communication between the device of different level signals to low cost, the reliability is high.

Description

Encoder signal level conversion circuit

Technical Field

The utility model relates to the field of electronic technology, especially, relate to an encoder signal level conversion circuit.

Background

With the improvement of the complexity of finished steel plate defect detection products, the types of devices contained in the system are more and more, the requirements of each device on level signals are different, and devices with different level signals, such as an encoder requiring an HTL level and a counting interface board requiring a TTL signal, cannot communicate with each other.

Therefore, how to implement communication between devices with different level signals is an urgent problem to be solved.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the present invention provides an encoder signal level conversion circuit, which realizes communication between devices driven by different voltages, and has low cost and high reliability.

The embodiment of the utility model provides an encoder signal level converting circuit for the realization is to pulse signal's count, include:

the system comprises an HTL encoder for HTL signal input, a TTL counting interface end for TTL signal output, and a plurality of level conversion modules for converting the HTL signal input by the signal input end into a TTL signal, wherein the level conversion modules have the same structure;

the input end of the level conversion module is connected with the input end of the HTL encoder, and the output end of the first level conversion module is connected with the output end of the TTL counting interface end.

The level conversion module comprises a power supply module and an HTL-TTL level conversion module, and the power supply module is connected with the multichannel level conversion module;

the power supply module comprises an integrated voltage stabilizer U1, an electrolytic capacitor C2, a resistor R1, a diode D1 and a light emitting diode LED1, wherein the Vin end of the voltage stabilizer U1 is connected with one end of the electrolytic capacitor C1 to form the input end of the power supply module for externally connecting power supply voltage; the other end of the electrolytic capacitor C1 is connected with the diode D1, the electrolytic capacitor C2 and the light-emitting diode LED1 respectively and is grounded, the ADJ end of the voltage stabilizer U1 is connected with the diode D1, the VOUT end of the voltage stabilizer U1 is connected with the electrolytic capacitor C2 and the resistor R1 to form a power supply end of the power supply module, the other end of the diode D1 is connected with the electrolytic capacitor C2 and the light-emitting diode LED1 respectively and is grounded, and the other end of the electrolytic capacitor C2 is connected with the light-emitting diode LED1 and is grounded;

the HTL-TTL level converter comprises a resistor R22, a resistor R2, a resistor R3, a resistor R5, a resistor R6, a filter capacitor C4, a triode Q1 and a light emitting diode LED2, wherein one end of the resistor R22 is connected with an HTL level input end of the encoder, namely the other end of the resistor R22 and the resistor R2 at the input end of the HTL-TTL level converter are connected with the resistor R3, the resistor R22 and the resistor R2 are used for voltage division, the resistor R3 is used for current limiting, the other end of the resistor R2 is connected with the capacitor C4, the triode Q1 and the light emitting diode LED2 and is grounded, the capacitor C4 is used for filtering, the other end of the resistor R3 is connected with the triode Q1, the other end of the triode Q1 is connected with the resistor R4 and the resistor R5, the resistor R4 and the resistor R5 are used for current limiting, the other end of the resistor R4 forms a power taking end of the HTL-TTL level converter, and is used for connecting with a power taking end of the power supply module, the other end of the resistor R5 is connected with a node of the encoder R6 to form a TTL level output end, namely the output end of the HTL-TTL level converter, the other end of the resistor R6 is connected with the light emitting diode R2 and is used for indicating the LED2 and is used for indicating the working state of the LED 2;

optionally, the input power voltage of the power module is 24v, and the output voltage is 5.4v;

optionally, the voltage regulator adopted by the power supply module is an LM7805 voltage regulator;

optionally, the level conversion module may be a two-channel HTL-TTL level conversion circuit, a four-channel HTL-TTL level conversion circuit, and a six-channel HTL-TTL level conversion circuit.

The utility model discloses technical scheme, through setting up multichannel level shift circuit, and then realize taking place communication between different voltage drive's the device to low cost, the reliability is high.

Drawings

Fig. 1 is a schematic structural diagram of an encoder signal level conversion circuit according to an embodiment of the present invention.

Fig. 2 is a schematic block diagram of a circuit of an encoder signal level conversion circuit according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of a level conversion module of an encoder signal level conversion circuit according to an embodiment of the present invention.

Fig. 4 is a schematic diagram of a power module of an encoder signal level conversion circuit according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Fig. 1 is a schematic view of an encoder measurement of an encoder signal level conversion circuit according to an embodiment of the present invention. Referring to fig. 1, the level shift circuit includes:

the HTL encoder is used for inputting HTL signals, and the HTL level signals have strong anti-jamming capability and have the defect of low working speed.

And the TTL level signal is directly connected with the integrated circuit without expensive line drivers and receiver circuits.

And the level conversion modules are used for converting the HTL signals input by the signal input end into TTL signals, have the same working principle and work together to realize the simultaneous conversion of multichannel levels of the encoder.

Fig. 3 is a schematic circuit diagram of an encoder signal level conversion circuit according to an embodiment of the present invention, referring to fig. 3, where the level conversion module includes a power module and an HTL-TTL level conversion module, and the power module is connected to the multi-channel level conversion module;

fig. 4 is a schematic diagram of a power module of an encoder signal level conversion circuit provided by an embodiment of the present invention, referring to fig. 4, the power module includes an integrated voltage regulator U1, an electrolytic capacitor C2, a resistor R1, a diode D1, and a light emitting diode LED1, wherein a Vin end of the voltage regulator U1 is connected to one end of the electrolytic capacitor C1 to form an input end of the power module, and the input end is used for external power voltage; the other end of the electrolytic capacitor C1 is connected with the diode D1, the electrolytic capacitor C2 and the light-emitting diode LED1 respectively and is grounded, the ADJ end of the voltage stabilizer U1 is connected with the diode D1, the VOUT end of the voltage stabilizer U1 is connected with the electrolytic capacitor C2 and the resistor R1 to form a power supply end of the power supply module, the other end of the diode D1 is connected with the electrolytic capacitor C2 and the light-emitting diode LED1 respectively and is grounded, and the other end of the electrolytic capacitor C2 is connected with the light-emitting diode LED1 and is grounded;

besides filtering, when a level signal output by the HTL encoder is unstable, the filter capacitor C4 can supply power or release redundant charges to play a role in anti-jitter, so that a transmitted signal is smoother, false triggering is reduced, and anti-interference performance is enhanced.

optionally, fig. 2 is a schematic circuit block diagram of an encoder signal level conversion circuit according to an embodiment of the present invention, referring to fig. 2, the level conversion module may be a two-channel HTL-TTL level conversion circuit, a four-channel HTL-TTL level conversion circuit, and a six-channel HTL-TTL level conversion circuit.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. A signal level conversion circuit of an encoder is used for counting pulse signals and is characterized by comprising an HTL encoder, a TTL counting module and a level conversion circuit used for converting the HTL signals into the TTL signals;

the HTL encoder is used for receiving the pulse signal, performing HTL encoding on the pulse signal to obtain a corresponding HTL signal, and outputting the HTL signal through an output end of the HTL encoder, wherein the output end of the HTL encoder is connected with the input end of the level conversion circuit; the level conversion circuit is used for receiving and converting the HTL signals output by the HTL encoder to obtain corresponding TTL signals and outputting the TTL signals, and the output end of the level conversion circuit is connected with the input end of the TTL counting module; the TTL counting module is used for receiving the TTL signals output by the level conversion circuit and counting the TTL signals, and the TTL counting module outputs counting results of the TTL signals.

2. The encoder signal level conversion circuit according to claim 1, wherein the level conversion circuit comprises a power module and at least one HTL-TTL level converter, and a power supply terminal of the power module is connected to a power supply terminal of the HTL-TTL level converter;

the HTL-TTL level converter comprises a resistor R22, a resistor R2, a resistor R3, a resistor R5, a resistor R6, a filter capacitor C4, a triode Q1 and a light emitting diode LED2, wherein one end of the resistor R22 is connected with an HTL level input end of the encoder, namely the other end of the resistor R22 and the resistor R2 at the input end of the HTL-TTL level converter are connected with the resistor R3, the resistor R22 and the resistor R2 are used for voltage division, the resistor R3 is used for current limiting, the other end of the resistor R2 is connected with the capacitor C4, the triode Q1 and the light emitting diode LED2 and is grounded, the capacitor C4 is used for filtering, the other end of the resistor R3 is connected with the triode Q1, the other end of the triode Q1 is connected with the resistor R4 and the resistor R5, the resistor R4 and the resistor R5 are used for current limiting, the other end of the resistor R4 forms a power taking end of the HTL-TTL level converter, and is used for connecting with a power taking end of the power supply module, the other end of the resistor R5 forms a TTL level output end of the encoder TTL level converter, the other end of the resistor R6 is connected with the light emitting diode LED2 and is used for indicating the working state of the LED 2.

3. The encoder signal level shifting circuit of claim 2, wherein the input power supply voltage of the power supply module is 24v, and the output voltage is 5.4v.

4. The encoder signal level conversion circuit of claim 2, wherein the voltage regulator used by the power supply module is an LM7805 voltage regulator.