CN202351331U

CN202351331U - Detection circuit of pulse signals of automobile sensors

Info

Publication number: CN202351331U
Application number: CN2011204418935U
Authority: CN
Inventors: 姚成华
Original assignee: SUZHOU HAIGE NEW ENERGY AUTO ELECTRIC CONTROL SYSTEM TECHNOLOGY Co Ltd
Current assignee: SUZHOU HAIGE NEW ENERGY AUTO ELECTRIC CONTROL SYSTEM TECHNOLOGY Co Ltd
Priority date: 2011-11-10
Filing date: 2011-11-10
Publication date: 2012-07-25
Anticipated expiration: 2021-11-10

Abstract

The utility model discloses a detection circuit of pulse signals of automobile sensors, which comprises a pulse signal input port, a current-limiting filtering processing module, a voltage stabilization amplification processing module, a hysteresis comparison processing module, a filtering processing module and a pulse signal output port. The pulse signal input port is connected with input ends of the current-limiting filtering processing module and the voltage stabilization amplification processing module at a first common end, the output end of the voltage stabilization amplification processing module is connected with the input end of the hysteresis comparison processing module, and the output end of the hysteresis comparison processing module is connected with input ends of the filtering processing module and the pulse signal output port at a second common end. The detection circuit of the pulse signals of the automobile sensors gives full consideration to the whole automobile electronic environment, conducts signal processing on noise and interference with pertinences, and guarantees that the output pulse signals meet requirements of a system.

Description

The testing circuit of the pulse signal of automobile sensor

Technical field

The utility model relates to a kind of automobile sensor signal acquiring system, particularly a kind of testing circuit of pulse signal of automobile sensor.

Background technology

Automotive electronicsization is considered to the revolution in the automotive engineering development process, and the degree of automotive electronicsization is counted as the important symbol of weighing the Hyundai Motor level, is to be used for developing new model, improves the most important technical measures of automotive performance.The automaker thinks increases the quantity of vehicle electronics, promote that automotive electronicsization is to capture the important effective means of following automobile market.

Sensor is as the important component part of automotive electronics, and mainly being responsible for microcomputer provides essential signal input to comprise: simulating signal, pulse signal etc.As the signal source of Auto Electronic Controlled System, the quality of sensor signal realizes playing crucial effects for performance optimization, the function of system.Because the degree of automotive electronicsization is increasingly high now; The interference of outer bound pair signal also is on the rise; Often be mingled with noise in the signal and interference is transferred to microcomputer, influencing the performance of system, serious even produce misoperation; To above-mentioned situation; To the pulse signal of sensor and the testing circuit of special exploitation does not almost have, institute thinks the quality and the intensity of the pulse signal of assurance sensor in the market, seems particularly important to the design of the pulse signal testing circuit of sensor.

The pulse signal testing circuit of common automobile sensor is considered less to the electronic environment of car load, the result who causes like this pulse signal distortion has often influenced the Performance And Reliability of system so that can not satisfy the system logic processing demands.

The utility model content

The utility model mainly is to solve the existing in prior technology technical matters, thereby a kind of testing circuit of developing for the pulse signal of automobile sensor specially is provided, with the quality and the intensity of the pulse signal that guarantees sensor.

The above-mentioned technical matters of the utility model mainly is able to solve through following technical proposals: a kind of testing circuit of pulse signal of automobile sensor; Described testing circuit comprises pulse signal input interface, current limliting Filtering Processing module, voltage stabilizing processing and amplifying module, sluggish comparison process module, Filtering Processing module and pulse signal output interface; The input end of described pulse signal input interface and described current limliting Filtering Processing module and voltage stabilizing processing and amplifying module is connected in one first common port; The output terminal of described voltage stabilizing processing and amplifying module is connected with the input end of described sluggish comparison process module, and the input end of the output terminal of described sluggish comparison process module and described Filtering Processing module, pulse signal output interface is connected in one second common port.

Because the testing circuit of the pulse signal of the automobile sensor of the utility model has taken into full account the finished vehicle electronic environment, and noise carried out signal Processing targetedly with disturbing, guaranteed the requirement of output pulse signal compliance with system.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is that the functional module of testing circuit of pulse signal of the automobile sensor of the utility model connects synoptic diagram;

Fig. 2 is that the electronic component of the testing circuit among Fig. 1 connects synoptic diagram.

Embodiment

Below in conjunction with accompanying drawing the preferred embodiment of the utility model is set forth in detail, thereby the protection domain of the utility model is made more explicit defining so that advantage of the utility model and characteristic can be easier to it will be appreciated by those skilled in the art that.

The utility model provides a kind of testing circuit of developing for the pulse signal of automobile sensor specially, with the quality and the intensity of the pulse signal that guarantees sensor.

As shown in Figure 1; A kind of testing circuit of pulse signal of automobile sensor; This testing circuit comprises pulse signal input interface 1, current limliting Filtering Processing module 2, voltage stabilizing processing and amplifying module 3, sluggish comparison process module 4, Filtering Processing module 5 and pulse signal output interface 6; This pulse signal input interface 1 is connected in one first common port C1 with the input end of this current limliting Filtering Processing module 2 and voltage stabilizing processing and amplifying module 3; The output terminal of this voltage stabilizing processing and amplifying module 3 is connected with the input end of this sluggishness comparison process module 4, and the input end of the output terminal of this sluggishness comparison process module 4 and this Filtering Processing module 5, pulse signal output interface 6 is connected in one second common port C2.

The pulse signal of automobile sensor gets into current limliting Filtering Processing module 2 through pulse signal input interface 1; Get into voltage stabilizing processing and amplifying module 3 again; Get into sluggish comparison process module 4 again, get into Filtering Processing module 5 again, at last through 6 outputs of pulse signal output interface.

The principle of work of entire circuit is:

The pulse signal of automobile sensor is behind pulse signal input interface 1 input detecting circuit, and current limliting Filtering Processing module 2 at first, prevents the damage of big electric current to components and parts with signal through resistance with the current signal restriction in the reasonable scope.Carry out filtering then, the radio-frequency component in the filtering pulse signal.Through voltage stabilizing processing and amplifying module 3, at first use stabilivolt restriction voltage pulse output, the protection subsequent conditioning circuit then; Use amplifier then, pulse signal is carried out enough amplifications, to reach the requirement of system signal intensity; Signal is through being amplified into sluggish comparison process module 4, and comparer one end is provided with reference voltage, and the pulse signal and the reference voltage of the other end compared; Comparator output terminal is exported corresponding high-low level according to comparative result, realizes the conditioning of pulse signals.Hysteresis comparator is added with the response speed that positive feedback can be accelerated comparer, and is because positive feedback is very strong, much better than more than the intercoupling in the circuit in addition, can also exempt the self-sustained oscillation that produces owing to circuit parasitic coupling two.The process filtering of final pulse signal is after the output of pulse output interface.

The user needs the pulse signal of automobile sensor is connected to the input interface of the testing circuit of pulse signal; Near concrete electronic environment taking all factors into consideration then; According to the correlation parameter and the peripheral circuit of frequency range, amplitude and system requirements designed filters, voltage stabilizing, amplification, current limliting and the sluggish comparison process module of pulse signal, through the output interface of pulse signal pulse signal is delivered to electronic units such as microcomputer at last and got final product.

The testing circuit of the pulse signal of this automobile sensor has taken into full account the finished vehicle electronic environment, and noise is carried out signal Processing targetedly with disturbing, and has guaranteed the requirement of output pulse signal compliance with system.

The mentality of designing of the utility model below only is described with an embodiment, and under the situation that system allows, the utility model can expand to external more function module simultaneously, thereby expands its function to greatest extent.

The above is merely the embodiment of the utility model, but the protection domain of the utility model is not limited thereto, and any variation or replacement of expecting without creative work all should be encompassed within the protection domain of the utility model.Therefore, the protection domain of the utility model should be as the criterion with the protection domain that claims were limited.

Claims

1. the testing circuit of the pulse signal of an automobile sensor; It is characterized in that; Described testing circuit comprises pulse signal input interface (1), current limliting Filtering Processing module (2), voltage stabilizing processing and amplifying module (3), sluggish comparison process module (4), Filtering Processing module (5) and pulse signal output interface (6); Described pulse signal input interface (1) is connected in one first common port (C1) with the input end of described current limliting Filtering Processing module (2) and voltage stabilizing processing and amplifying module (3); The output terminal of described voltage stabilizing processing and amplifying module (3) is connected with the input end of described sluggish comparison process module (4), and the input end of the output terminal of described sluggish comparison process module (4) and described Filtering Processing module (5), pulse signal output interface (6) is connected in one second common port (C2).