CN204329988U - A kind of sensor acquisition process circuit - Google Patents
A kind of sensor acquisition process circuit Download PDFInfo
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- CN204329988U CN204329988U CN201520026470.5U CN201520026470U CN204329988U CN 204329988 U CN204329988 U CN 204329988U CN 201520026470 U CN201520026470 U CN 201520026470U CN 204329988 U CN204329988 U CN 204329988U
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Abstract
The utility model discloses a kind of sensor acquisition process circuit, comprise infrared transmitting circuit, high-order gray encoding dish, low level gray encoding dish, high-order infrared receiving circuit, low level infrared receiving circuit, high-order hysteresis circuit, low level hysteresis circuit, gray code data generative circuit; The infrared light that described infrared transmitting circuit produces is divided into two tunnels, leads up to high-order gray encoding dish, high-order infrared receiving circuit to be connected with high-order hysteresis circuit; Separately leading up to low level gray encoding dish, low level infrared receiving circuit is connected with low level hysteresis circuit; The output terminal of high-order hysteresis circuit and low level hysteresis circuit is connected to gray code data generative circuit altogether, and gray code data generative circuit is connected with microcontroller circuit.Be applied in the feedback of actuator turns position.The utility model can accomplish Real-time Feedback current location, and power down without impact, re-powers the current location information that can also show the electronic or manual mode of actuator on sensor.
Description
Technical field
The utility model relates to a kind of sensor acquisition process circuit, and specifically, it is a kind of sensor acquisition process circuit of the rotary encoder based on multi-turn Gray code.
Background technology
Rotary encoder, as a kind of position transducer, is applied on actuator position output feedack axle usually, and the sensor acquisition process circuit in rotary encoder when actuator works, can transmit current valve position location status information in real time.Gray code is converted to binary digital signal as mechanical rotating signal, in rotary coding wherein existing use, but, the Acquisition Circuit majority of existing rotary encoder is increment type, and tested actuator mostly be electronic with manually switch each other, its valve position both by Electronic control, also may may be that shake handwheel controls, and cause valve position to change; Moreover can not preserve current location information after a power failure, energising needs to reorientate, and shakes operated by handwheel actuator and do not know where current valve position is in power-off, gives debugging and installs and bring very large trouble later.Therefore, in the urgent need to improving existing scrambler Acquisition Circuit, enable to coordinate with actuator mechanical transmission structure is organic, regardless of actuator power down or not, still switch to and manually or after power down carry out shake operated by handwheel, can the absolute position of accurate feedback current actuator control valves position output feedack axle, i.e. current valve position position.
Summary of the invention
The purpose of this utility model is to provide a kind of sensor acquisition process circuit, this circuit solves current rotary encoder because of external condition of work and changes, as the impact that actuator power-off or manual and electric switch, and accurately can not reflect the problem of the absolute position of the valve position that current actuator controls, improve the safety and stability of scrambler.
The purpose of this utility model is achieved through the following technical solutions:
A kind of sensor acquisition process circuit, is characterized in that: this circuit comprises infrared transmitting circuit, high-order gray encoding dish, low level gray encoding dish, high-order infrared receiving circuit, low level infrared receiving circuit, high-order hysteresis circuit, low level hysteresis circuit, gray code data generative circuit; The infrared light that described infrared transmitting circuit produces is divided into two tunnels, leads up to high-order gray encoding dish, high-order infrared receiving circuit to be connected with high-order hysteresis circuit; Separately leading up to low level gray encoding dish, low level infrared receiving circuit is connected with low level hysteresis circuit; The output terminal of high-order hysteresis circuit and low level hysteresis circuit is connected to gray code data generative circuit altogether, and gray code data generative circuit is connected with microcontroller circuit.
In the utility model, described high-order infrared receiving circuit and low level infrared receiving circuit include 8 infrared receiving tubes, 8 infrared receiving tube circuit powers are 5V, and the working current of receiving tube is 0.2mA, and each receiving tube output signal is low level or high level.
Described infrared transmitting circuit comprises 8 infrared transmitting tubes, and wherein, 8 infrared transmitting tube circuit powers are 5V, and the working current of power valve is 20mA.
Described high-order gray encoding dish, the Gray code of low level gray encoding dish are 8.
Described high-order hysteresis circuit and low level hysteresis circuit include reference voltage circuit, hysteresis loop comparator circuit, wherein: reference voltage circuit is made up of resistance in series, voltage follower, voltage follower comprises LMV358, and the reference voltage of reference voltage circuit is 2 1.5V; Hysteresis loop comparator circuit comprises 4 differential comparator LM339, produces two hysteresis comparative voltage 0.6V and 3V by reference voltage and reverse input end; Input termination reference voltage circuit, the high-order infrared receiving circuit of the hysteresis loop comparator circuit in high-order hysteresis circuit, the input termination reference voltage circuit of the hysteresis loop comparator circuit in low level hysteresis circuit, low level infrared receiving circuit, output terminal connects gray code data generative circuit jointly.Because a road lagging circuit correspondence receives a road from infrared receiving circuit input signal, therefore, a road lagging circuit exports 8 signals to thunder code data generative circuit.
Described gray code data generative circuit comprises two and is incorporated to the device MC14021 gone here and there out, and two MC14021 access high-order hysteresis circuit and low level hysteresis circuit respectively, within a time cycle, is incorporated to and goes here and there out one group of 16 binary serial data.
In the utility model, in order to avoid the reading that makes a mistake, extend the serviceable life of transmitting and receiver pope simultaneously, transmitting and receiving circuit all have employed constant current-supplying, the shaping of hysteresis circuit, SPI interface circuit exports, and substantially increases the stable and reliable of scrambler numerical value output.
Major advantage of the present utility model is: this sensor Acquisition Circuit directly reacts mechanical drive signal by high-order, low level Gray code-disc, namely with the coordinating of physical construction, after efficiently solving actuator power down or power down shake operated by handwheel change valve position, the valve position state of current actuator can be remembered in real time.Further, the utility model produces binary one 6 bit serial data by thunder code data generative circuit, and converting the decimal system to maximum is 65535, and topworks's rotation one circle is 64 code values, so to remembering 1024 circles.Corresponding 360 degree of one circle, 64 code values, therefore often enclose resolution and reach 7.2 degree, improve the precision of scrambler and the safety and stability of use.
Accompanying drawing explanation
Fig. 1 structural representation of the present utility model.
The schematic diagram of infrared transmitting circuit four transmitter units in Fig. 2 the utility model.
The schematic diagram of four receiving elements in high-order infrared receiving circuit and low level infrared receiving circuit in Fig. 3 the utility model.
The schematic diagram of a differential comparator unit in high-order hysteresis circuit and low level hysteresis circuit in Fig. 4 the utility model.
The schematic diagram of gray code data generative circuit in Fig. 5 the utility model.
Embodiment
Embodiment of the present utility model is specifically introduced below in conjunction with accompanying drawing:
Shown in Fig. 1, a kind of sensor acquisition process circuit of the present utility model, be made up of infrared transmitting circuit, high-order gray encoding dish, low level gray encoding dish, two road infrared receiving circuits (high-order infrared receiving circuit and low level infrared receiving circuit), two tunnel hysteresis circuit (high-order hysteresis circuit and low level hysteresis circuit), gray code data generative circuit, wherein a road hysteresis circuit comprises reference voltage circuit, hysteresis loop comparator circuit.In this programme, the infrared light that infrared transmitting circuit is launched is divided into two-way, correspond respectively to high-order gray encoding dish, low level gray encoding dish, the infrared light of high-order gray encoding dish, low level gray encoding dish is crossed by two Reuters, Ge You mono-road infrared receiving circuit and a road hysteresis circuit receive, process and output photoelectric signal, and then two tunnels merging input to gray code data generative circuit and generate gray code data.Gray code data generative circuit is connected with microcontroller circuit, and microcontroller circuit accepts gray code data and accurately controls scrambler.
Because this programme object is output 16 gray code data, therefore, infrared transmitting circuit is designed to 8 road infrared lights, each 8 bundles directional light (namely corresponding to 16) of two-way are become by mechanical hook-up bundle by light beam, corresponding to high-order gray encoding dish and low level gray encoding dish, the Gray code of two gray encoding dishes is 8, and the Photoelectric Signal Processing of infrared receiving circuit, hysteresis circuit, gray code data generative circuit and output gray code data ability are consistent all with it, each circuit theory as shown in the further figures.
Fig. 2 is the schematic diagram of four transmitter units in the infrared transmitting circuit of the utility model Fig. 1, actual infrared transmitting circuit comprises eight transmitter units, infrared transmitting circuit power supply is 5V, supply 8 infrared transmitting tubes, power valve resistance R that connects in every road carries out current limliting, an electric capacity in parallel prevents electrostatic damage, and the working current of power valve is 20mA.By to 8 road infrared transmitting tube constant current-supplyings, make infrared emission light intensity constant.
Fig. 3 is the schematic diagram of the utility model Tu1 mono-road infrared receiving circuit four receiving elements, and an actual road infrared receiving circuit comprises eight receiving elements, and two-way infrared receiving circuit then has 16 receiving elements altogether.The power supply of each infrared receiving circuit is 5V, supplies No. 8 receiving tubes, and receiving tube resistance R that connects in every road carries out current limliting, and an electric capacity in parallel prevents electrostatic damage, and the working current of receiving tube is 0.2mA.Receiving tube receives light signal and exports as low level, and not receiving light is high level, exports with gray code format.By this infrared receiving circuit, convert electric signal output by receiving to from the light signal of code-wheel.
Fig. 4 is the schematic diagram of the utility model Tu1 mono-tunnel hysteresis circuit differential comparator unit, hysteresis circuit comprises reference voltage circuit, hysteresis comparator circuit, wherein: reference voltage circuit is made up of resistance in series, voltage follower, voltage follower comprises LMV358, and the reference voltage of reference voltage circuit is 2 1.5V; Hysteresis loop comparator circuit comprises 4 differential comparator LM339, produces two hysteresis comparative voltage 0.6V and 3V by reference voltage and reverse input end, and Fig. 4 includes a differential comparator LM339 unit in reference voltage circuit and hysteresis loop comparator circuit.In this hysteresis circuit, receive and export low and high level from infrared receiving circuit, be imported into the negative input end of hysteresis loop comparator circuit, compare with the reference voltage of reference voltage circuit, reach gray code signal shaping operation, the data jump caused from mechanical shaking can be eliminated, add the stability of receiving circuit.
Fig. 5 is the schematic diagram of the gray code data generative circuit of the utility model Fig. 1, this gray code data generative circuit is made up of two panels MC14021, two MC14021 access the hysteresis circuit described in a road respectively, within a time cycle, be incorporated to and go here and there out one group of 16 binary serial data, this serial data is 16 gray code data.As shown in Figure 5, every sheet MC14021 has 8 data input pins, two panels forms most-significant byte and the input of least-significant byte data of Gray code, data export with SPI series form, one group of 16 binary serial data output cycle needs 16 clock period, is sampled by the 16 bit data Serial output be incorporated to single-chip microcomputer.The external interface of MC14021 is by clock CLK, and data export DOUT, chip selection signal PS and form.The SPI interface circuit of formation standard.
It is 65535 that the binary one 6 bit serial data of the utility model collection convert the decimal system to maximum, and topworks's rotation one circle is 64 code values, so to remembering 1024 circles.Corresponding 360 degree of one circle, 64 code values, therefore often enclose resolution and reach 7.2 degree.
Claims (6)
1. a sensor acquisition process circuit, is characterized in that: this circuit comprises infrared transmitting circuit, high-order gray encoding dish, low level gray encoding dish, high-order infrared receiving circuit, low level infrared receiving circuit, high-order hysteresis circuit, low level hysteresis circuit, gray code data generative circuit; The infrared light that described infrared transmitting circuit produces is divided into two tunnels, leads up to high-order gray encoding dish, high-order infrared receiving circuit to be connected with high-order hysteresis circuit; Separately leading up to low level gray encoding dish, low level infrared receiving circuit is connected with low level hysteresis circuit; The output terminal of high-order hysteresis circuit and low level hysteresis circuit is connected to gray code data generative circuit altogether, and gray code data generative circuit is connected with microcontroller circuit.
2. sensor acquisition process circuit according to claim 1, it is characterized in that: described high-order infrared receiving circuit and low level infrared receiving circuit include 8 infrared receiving tubes, 8 infrared receiving tube circuit powers are 5V, the working current of receiving tube is 0.2mA, and each receiving tube output signal is low level or high level.
3. sensor acquisition process circuit according to claim 1, it is characterized in that: described infrared transmitting circuit comprises 8 infrared transmitting tubes, wherein, 8 infrared transmitting tube circuit powers are 5V, the working current of power valve is 20mA.
4. sensor acquisition process circuit according to claim 1, is characterized in that: described high-order gray encoding dish, the Gray code of low level gray encoding dish are 8.
5. sensor acquisition process circuit according to claim 1, it is characterized in that: described high-order hysteresis circuit and low level hysteresis circuit include reference voltage circuit, hysteresis loop comparator circuit, wherein: reference voltage circuit is made up of resistance in series, voltage follower, voltage follower comprises LMV358, and the reference voltage of reference voltage circuit is 2 1.5V; Hysteresis loop comparator circuit comprises 4 differential comparator LM339, produces two hysteresis comparative voltage 0.6V and 3V by reference voltage and reverse input end; Input termination reference voltage circuit, the high-order infrared receiving circuit of the hysteresis loop comparator circuit in high-order hysteresis circuit, the input termination reference voltage circuit of the hysteresis loop comparator circuit in low level hysteresis circuit, low level infrared receiving circuit, output terminal connects gray code data generative circuit jointly.
6. sensor acquisition process circuit according to claim 1, it is characterized in that: described gray code data generative circuit comprises two and is incorporated to the device MC14021 gone here and there out, two MC14021 access high-order hysteresis circuit and low level hysteresis circuit respectively, within a time cycle, be incorporated to and go here and there out one group of 16 binary serial data.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520026470.5U CN204329988U (en) | 2015-01-14 | 2015-01-14 | A kind of sensor acquisition process circuit |
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| CN201520026470.5U CN204329988U (en) | 2015-01-14 | 2015-01-14 | A kind of sensor acquisition process circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107520850A (en) * | 2017-08-11 | 2017-12-29 | 国家电网公司 | A kind of Intelligent Mobile Robot |
| CN107797065A (en) * | 2017-10-19 | 2018-03-13 | 佘德勇 | Frequency conversion fan low speed operation troubles detects warning circuit |
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2015
- 2015-01-14 CN CN201520026470.5U patent/CN204329988U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107520850A (en) * | 2017-08-11 | 2017-12-29 | 国家电网公司 | A kind of Intelligent Mobile Robot |
| CN107797065A (en) * | 2017-10-19 | 2018-03-13 | 佘德勇 | Frequency conversion fan low speed operation troubles detects warning circuit |
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