CN203177889U - Regional light curtain sensor - Google Patents

Abstract

The utility model discloses a regional light curtain sensor which comprises a transmitter and a receiver. The transmitter comprises a microprocessor control module, wherein the microprocessor control module is connected with a self checking module, a signal transmitting module, a synchronous signal output transmission module, a transmission indicating module and a transmission expansion interface module. The receiver comprises a microprocessor module and a signal receiving module, wherein the signal receiving module is sequentially connected with a signal primary amplification module and a signal secondary amplification module; the microprocessor module is connected with the signal primary amplification module, the signal secondary amplification module, the synchronous signal receiving transmission module, an output and short circuit detection module, a receiving indicating module and a receiving expansion interface module. Compared with products in the prior art, the regional light curtain sensor disclosed by the utility model is not only simple in circuit but also improved in product performance. Improvement of the performance enables the operation to be more stable, thereby being adapt to a wider range of occasions.

Description

A kind of area light curtain sensor

Technical field

The utility model relates to the area light curtain sensor.

Background technology

At present the area light curtain sensor is widely used, and is mainly used in all kinds of printings, punch press, on the equipment such as injection moulding to the protection of human body.The low-end product cost is low but function is simple, poor reliability, anti-interference and stable on all be weak, tend to cause inefficacy, only can be applicable to the occasion that requirement is lower.But high-end product dependable performance cost is too high, also more complicated for production.The development of area light curtain sensor is ripe relatively, but the economic light curtain sensor of dependable performance is also fewer at home.Existing low side area light curtain sensor adopts discrete device to realize that its principle is more: produce pulsating wave by oscillatory circuit earlier, process pulsewidth processing and shaping and channel selection circuit signal superpose, and deliver to the switch controlled emission then.Simultaneously transponder pulse is sent to receiver through synchronizing signal.Receiver is undertaken superimposed by synchronizing signal and channel selection circuit, the corresponding passage of gating.Keep through carrying out signal behind amplification and the integrating circuit behind each passage gating, in the scan period, signal is connected in series with, when receiver does not receive signal, be 0 with regard to it with the result, do not block if all have object, be 1 with the result then, according to the result decide output.Existing area light curtain sensor uses the mode of combination to realize that its basic characteristics are by the stack combinations with the single-point control circuit, add unified control and realize function at the circuit framework.Its control circuit complexity, function singleness.

The utility model content

At the defective that exists in the prior art, the purpose of this utility model provides a kind of area light curtain sensor.

For achieving the above object, the utility model adopts following technical scheme:

A kind of area light curtain sensor, comprise transmitter and the receiver that is complementary with transmitter, described transmitter comprises the microprocessor control module, and described microprocessor control module links to each other with selftest module, signal emission module, synchronizing signal output transport module, emission indicating module and emission expansion connection module respectively; Also comprise in the described transmitter for the emission power module of power supply being provided for each module.

Described receiver comprises microprocessor module and signal receiving module, and described signal receiving module links to each other with amplification module of signal and signal secondary amplification module successively; Described microprocessor module receives transport module, output and short-circuit detecting module, receives indicating module and receives expansion connection module with amplification module of signal, signal secondary amplification module, synchronizing signal respectively and links to each other; Also comprise in the described receiver for the reception power module of power supply being provided for each module.

The first antipolarity protection module, first main power source module and DC/DC power transfer module that described emission power module comprises the first surge protection module, is connected successively with the described first surge protection module.

Described signal emission module comprises emission driver module and at least one group of power valve module, and described emission driver module adopts the ranks matrix form to drive to the power valve module and realizes control.

The second antipolarity protection module and second main power source module that described reception power module comprises the second surge protection module, is connected successively with the described second surge protection module.

Compared with prior art, adopt a kind of area light curtain sensor of the present utility model to have following beneficial effect:

1) circuit is simplified, because the device that uses reduces, has saved material cost and production and processing cost, has reduced the failure rate that causes because of production and processing.

2) owing to adopt microprocessor and protection device, promoted properties of product, the lifting of performance makes work more stable, and it is more extensive to adapt to occasion; Serviceability is more secure to the person and device security reliably, bigger reduction loss.

In a word, a kind of area light curtain sensor of the present utility model is owing to adopt the matrix form combination, reduced the device use, adopt microprocessor to handle simultaneously, promoted reliability, so not only solve the stability problem of low side light curtain, reached the performance characteristics of high-end light curtain, also reduced material cost and production and processing cost.

Description of drawings

Fig. 1 is the principle schematic of transmitter of the present utility model;

Fig. 2 is the principle schematic of receiver of the present utility model;

Fig. 3 is the circuit diagram of transmitter of the present utility model;

Fig. 4 is the circuit diagram of receiver of the present utility model.

Embodiment

Further specify the technical solution of the utility model below in conjunction with drawings and Examples.

See also Fig. 1, a kind of area light curtain sensor shown in Figure 2, comprise transmitter and the receiver that is complementary with transmitter, transmitter comprises the microprocessor control module, and the microprocessor control module links to each other with selftest module, signal emission module, synchronizing signal output transport module, emission indicating module and emission expansion connection module respectively; Also comprise in the transmitter for the emission power module of power supply being provided for each module.

Receiver comprises microprocessor module and signal receiving module, and signal receiving module links to each other with amplification module of signal and signal secondary amplification module successively; Described microprocessor module receives transport module, output and short-circuit detecting module, receives indicating module and receives expansion connection module with amplification module of signal, signal secondary amplification module, synchronizing signal respectively and links to each other; Also comprise in the receiver for the reception power module of power supply being provided for each module.

See also again shown in Figure 3, the first antipolarity protection module, first main power source module and DC/DC power transfer module that the emission power module comprises the first surge protection module, is connected successively with the described first surge protection module.Signal emission module comprises emission driver module and at least one group of power valve module, and described emission driver module adopts the ranks matrix form to drive to the power valve module and realizes control.As eight NPN type triode Q1 in the emission driver module among Fig. 3, Q2, Q3, Q4, Q12, Q13, Q14, Q15 is for eight emitting diode TD1 in one group of power valve module, TD2, TD3, TD4, TD5, TD6, TD7, the negative pole of TD8 adopts the ranks matrix form to drive and realizes control, and the emitting diode TD1 in same group, TD2, TD3, TD4, TD5, TD6, TD7, TD8 is then realized driving by the driving tube Q5 in the emission driver module, if must increase the quantity of power valve module, then can be by driving tube Q6, Q7, Q8, Q9, Q10 drives, the corresponding one group of power valve module of each driving tube.

See also shown in Figure 4ly again, receive the second antipolarity protection module and second main power source module that power module comprises the second surge protection module, is connected successively with the second surge protection module.

A kind of area light curtain sensor of the present utility model has following characteristics:

1. the emitting diode of transmitter adopts the ranks matrix form to drive and realizes control, thereby saves cost.

2. emitter failures detects: adopt resistance R 14 and diode D7 to do current sampling, control positive-negative-positive triode Q11 then, and when electric current, positive-negative-positive triode Q11 conducting, the check end is high level, otherwise is low level.The microprocessor control module is by the identification level and control sequential transmitter duty as can be known.

3. emission mode is set: can realize the setting of emission mode by positive reversal connection power lead.When J2-2 as shown connects positive pole, when J2-9 connect negative pole, LO/DO-C was high level; Reversal connection, LO/DO-C is low level.The microprocessor control module provides different emission modes by the identification level.

4. expansion is convenient: the expansion of counting only need increase power valve, increases a driving tube when 8 power valves of every increase on the hardware circuit, saves cost, and expansion is convenient.

5. protect complete: all have the TVS pipe to be used for anti-surge protection at each port.

6. the receiving tube of receiver is passed to amplifying circuit by analog switch one by one with signal, and the signal after elementary amplification of each group is passed to secondary amplification circuit through analog switch with signal again, gives microprocessor module with signal again after the amplification.

7. the mode of the positive reversal connection of receiver employing power lead realizes exporting and often opens/normally closed setting.

8. output circuit detects load circuit by resistance R 48, by the SHORT pin signal is passed to microprocessor module and then is turn-offed output when load current is too big.

9. pointwise emission during the emission of transmitter, and by synchronizing signal emission information is passed to receiver, receiver is identified after receiving signal, opens corresponding receiving cable.

Those of ordinary skill in the art will be appreciated that, above embodiment illustrates the purpose of this utility model, and be not with opposing restriction of the present utility model, as long as in essential scope of the present utility model, all will drop in the scope of claim of the present utility model variation, the modification of the above embodiment.

Claims (4)

1. area light curtain sensor, comprise transmitter and with the receiver that transmitter is complementary, it is characterized in that:

Described transmitter comprises the microprocessor control module, and described microprocessor control module links to each other with selftest module, signal emission module, synchronizing signal output transport module, emission indicating module and emission expansion connection module respectively; Also comprise in the described transmitter for the emission power module of power supply being provided for each module;

Described receiver comprises microprocessor module and signal receiving module, and described signal receiving module links to each other with amplification module of signal and signal secondary amplification module successively; Described microprocessor module receives transport module, output and short-circuit detecting module, receives indicating module and receives expansion connection module with amplification module of signal, signal secondary amplification module, synchronizing signal respectively and links to each other; Also comprise in the described receiver for the reception power module of power supply being provided for each module.

2. area light curtain sensor according to claim 1 is characterized in that:

The first antipolarity protection module, first main power source module and DC/DC power transfer module that described emission power module comprises the first surge protection module, is connected successively with the described first surge protection module.

3. area light curtain sensor according to claim 1 is characterized in that:

Described signal emission module comprises emission driver module and at least one group of power valve module, and described emission driver module adopts the ranks matrix form to drive to the power valve module and realizes control.

4. area light curtain sensor according to claim 1 is characterized in that:

The second antipolarity protection module and second main power source module that described reception power module comprises the second surge protection module, is connected successively with the described second surge protection module.

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