CN101894292A - Sensor sampling type mechanical number wheel - Google Patents

Abstract

The invention discloses a sensor sampling type mechanical number wheel which comprises sensors (a) and a number wheel (b) with ten numbers from 0 to 9, wherein a light area (d) or a dark area (e) used for reflecting to the sensors (a) is provided for each number on the number wheel (b), , and all together five light areas and five dark areas are provided; four sensors (a) are provided and continuously arranged corresponding to positions of four continuous numbers on the number wheel; and the arrangements of the five light areas and the five dark areas ensure that the dark areas are inserted in the five light areas. In the invention, only four sensors are needed to realize accurate counting, thus the cost is saved on one hand, and on the other hand, 4-bit sampling data is more suitable for the data width of microprocessors such as a singlechip microprocessor, and the like; and for example, one byte of a 8-bit microprocessor chip can access the readings of two number wheel numbers so that the post processing of chip software can be more convenient and the error rate of products can be reduced.

Description

The mechanical character wheel of sensor sampling type

Technical field

The present invention relates to a kind of mechanical character wheel of sensor sampling type, be applicable to intelligent gas meter, water meter, ammeter etc. need the product of metering.

Background technology

Usually can see the mechanical character wheel by sensor sample on existing intelligent gas meter, this character wheel is mainly used in the metering of combustion gas.All have area pellucida or dark space corresponding to each numeral on this character wheel, this is that the sensor acquisition signal is used, when character wheel is rotating, rotate thereupon area pellucida and dark space, sensor will collect the unlike signal corresponding to numeral on the character wheel, this signal is transferred to handles the output quantity of just knowing combustion gas among the MCU, thereby reaches the purpose of automatic gauge.But the area pellucida on the character wheel and the distribution situation of dark space are that all (5) area pellucidas are arranged in together continuously at present, all (5) dark spaces are arranged in together continuously, this arrangement mode causes sensor must use 5, and the data of 5 sensor inputs obviously not too are fit to the data width of microprocessor, institute takes up space big, microprocessor chip such as 8, a reading on just can only the access character wheel, post-processed to MCU is made troubles, cost is higher on the one hand, and error rate also can be higher relatively on the other hand.

Summary of the invention

The object of the present invention is to provide a kind of cost lower, the mechanical character wheel of the sensor sampling type that error rate is less relatively.

The mechanical character wheel of this sensor sampling type provided by the invention, comprise sensor and the character wheel that has ten numerals of 0-9, all be useful on an area pellucida or dark space of reflecting to sensor corresponding to each numeral on the character wheel, amount to 5 area pellucidas and 5 dark spaces, described sensor is that install continuously 4 and the position that corresponds respectively to 4 continuous numbers on the character wheel, and the arrangement of 5 area pellucidas and 5 dark spaces makes between 5 area pellucidas and is inserted with the dark space.

Be distributed as 70 kinds corresponding to the light and shade district of ten numerals on the character wheel.

The present invention is owing to carried out the light and shade district to be different from the arrangement of prior art, make mechanical character wheel under the situation of having only 4 sensors, just can carry out accurate counting, saved cost on the one hand, 4 sampled datas on the other hand, the data width that is fit to such microprocessor such as single-chip microcomputer more, such as 8 microprocessor chip, the reading that the data of a byte just can 2 wheel digitals of access, the post-processed of more convenient chip software can reduce the product error rate simultaneously.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Fig. 2 be in one embodiment of the present invention under original state the stretch-out view of character wheel and sensing station.

Fig. 3 is the stretch-out view that character wheel rotates character wheel and sensor relative position behind the lattice.

Fig. 4 be sensor acquisition to the corresponding diagram of signal encoding and the wheel digital of reading.

Embodiment

Embodiment one: the present invention still has sensor a and character wheel b as can be seen from Figure 1, character wheel has ten numerals of 0-9, the back side of character wheel is echo area c, form by five area pellucida d and five dark space e, a numeral on area pellucida or the corresponding character wheel in dark space, echo area c provides acquired signal to sensor a.Four altogether of sensor a, a then position that is fixedly mounted on the character wheel original state continuously, promptly four sensor a correspond respectively to 0,1,2,3 the position (see figure 2) of character wheel b.

Being inserted with dark space e between five area pellucida d as can be seen from Figure 2, is four area pellucidas corresponding to 0,1,2,3 position on the character wheel, and is the dark space corresponding to 4 position, and the position corresponding to 5 is the area pellucida, and the position corresponding to 6,7,8,9 is the dark space.

If area pellucida d is with 1 expression, dark space e (can also represent with 0 by area pellucida d with 0 expression, dark space e is with 1 expression), area pellucida d so shown in Figure 2 and the arranging and encoding of dark space e should be 1111010000, this moment four sensor acquisition to signal encoding should be 1111, this coding just expression has read 0.When character wheel rotates lattice, numeral on the character wheel and light and shade district corresponding to the position of four sensors just as shown in Figure 3, this moment sensor acquisition to signal encoding should be 1110, this coding just expression has read 1, by that analogy, which numeral character wheel turns to, sensor acquisition to its coding of signal just expression read which numeral.When 0-9 these ten numerals of character wheel are read one by one, its coding of the signal that corresponding sensor collects has corresponding ten as can be seen from Figure 4, and these ten codings do not repeat.Reflected the situation that character wheel rotates thus exactly, thereby gas meter, flow meter is correctly measured.

4 sensors should be corresponding to then continuous installation of one of 4 continuous numerals on the character wheel, the inventor has carried out different arranged evenly to 5 area pellucida d and 5 dark space e in this case, by program verification, have following 70 kinds arranged evenly, can just can make gas meter, flow meter carry out correct metering only with 4 sensors, see Table one, wherein the area pellucida is represented with 1, and the dark space is with 0 representing (also can the area pellucida with 0, the dark space is represented with 1).

Table one

Sequence number	Coding arranged evenly (area pellucida is 1, and the dark space is 0) corresponding to the area pellucida and the dark space of 10 numerals on the character wheel	The coding of 10 position electronical readings (16 system)
			1	0000101111	0125B7FEC8
2	0000110111	0136DB7EC8
			3	0000111011	0137EDB6C8
4	0000111101	0137FEDA48
			5	0001001111	124937FEC8
6	0001011101	125B7EDA48
			7	0001011110	125B7FEC80
8	0001101110	136DB7EC80
			9	0001110110	137EDB6C80
10	0001111001	137FEC9248
			11	0001111010	137FEDA480
12	0010001111	248137FEC9
			13	0010011110	24937FEC81
14	0010111010	25B7EDA481
			15	0010111100	25B7FEC801
16	0011011100	36DB7EC801
			17	0011101100	37EDB6C801
18	0011110001	37FEC81249
			19	0011110010	37FEC92481
20	0011110100	37FEDA4801
			21	0100001111	480137FEDA
22	0100010111	48125B7EDA
			23	0100011110	48137FEC92
24	0100111100	4937FEC812
			25	0101110100	5B7EDA4812
26	0101111000	5B7FEC8012
			27	0110000111	6C80137EDB
28	0110111000	6DB7EC8013
			29	0111000011	7EC80136DB
30	0111010001	7EDA48125B
			31	0111011000	7EDB6C8013

32	0111100001	7FEC80125B
			33	0111100010	7FEC812493
34	0111100100	7FEC924813
			35	0111101000	7FEDA48013
36	1000010111	80125B7FEC
			37	1000011011	80136DB7EC
38	1000011101	80137EDB6C
			39	1000011110	80137FEDA4
40	1000100111	8124937FEC
			41	1000101110	8125B7EDA4
42	1000111100	8137FEC924
			43	1001000111	9248137FEC
44	1001111000	937FEC8124
			45	1010000111	A480137FED
46	1010001011	A48125B7ED
			47	1011000011	B6C80137ED
48	1011100001	B7EC80136D
			49	1011101000	B7EDA48125
50	1011110000	B7FEC80125
			51	1100001011	C80125B7FE
52	1100001101	C80136DB7E
			53	1100001110	C80137EDB6
54	1100010011	C8124937FE
			55	1100100011	C9248137FE
56	1101000011	DA480137FE
			57	1101000101	DA48125B7E
58	1101100001	DB6C80137E
			59	1101110000	DB7EC80136
60	1110000101	EC80125B7F
			61	1110000110	EC80136DB7
62	1110001001	EC8124937F
			63	1110010001	EC9248137F
64	1110100001	EDA480137F
			65	1110100010	EDA48125B7
66	1110110000	EDB6C80137
			67	1111000010	FEC80125B7
68	1111000100	FEC8124937
			69	1111001000	FEC9248137
70	1111010000	FEDA480137

The arranged evenly of above-mentioned as can be seen from Table 1 70 kinds of area pellucidas and dark space is not repeat, what the coding of electronical reading adopted is 16 systems, do not repeat yet, this has proved absolutely as long as the area pellucida of character wheel and dark space are distributed and arrange by this 70 kinds of modes, just can only adopt four sensors and counts accurately.Saved table meter cost thus, four sensors are well suited for the data width of such microprocessor such as single-chip microcomputer simultaneously, and the post-processed of more convenient chip software can reduce the product error rate simultaneously.

Claims (2)

1. the mechanical character wheel of a sensor sampling type, comprise sensor (a) and have the character wheel (b) of ten numerals of 0-9, character wheel (b) is gone up corresponding to each numeral and all is useful on an area pellucida (d) or a dark space (e) of reflecting to sensor (a), amount to 5 area pellucidas and 5 dark spaces, it is characterized in that, described sensor (a) is that install continuously 4 and the position that corresponds respectively to 4 continuous numbers on the character wheel, and the arrangement of 5 area pellucidas (d) and 5 dark spaces (e) makes between 5 area pellucidas and is inserted with the dark space.

2. the mechanical character wheel of sensor sampling type according to claim 1, it is characterized in that corresponding to the light and shade district of ten numerals on the character wheel be distributed as following 70 kinds, wherein the area pellucida represents that with 1 the dark space is represented with 0:

Sequence number The light and shade district distributes Sequence number The light and shade district distributes 1 0000101111 13 0010011110 2 0000110111 14 0010111010 3 0000111011 15 0010111100 4 0000111101 16 0011011100 5 0001001111 17 0011101100 6 0001011101 18 0011110001 7 0001011110 19 0011110010 8 0001101110 20 0011110100 9 0001110110 21 0100001111 10 0001111001 22 0100010111 11 0001111010 23 0100011110 12 0010001111 24 0100111100 25 0101110100 48 1011100001 26 0101111000 49 1011101000 27 0110000111 50 1011110000 28 0110111000 51 1100001011 29 0111000011 52 1100001101 30 0111010001 53 1100001110 31 0111011000 54 1100010011 32 0111100001 55 1100100011 33 0111100010 56 1101000011 34 0111100100 57 1101000101 35 0111101000 58 1101100001 36 1000010111 59 1101110000 37 1000011011 60 1110000101 38 1000011101 61 1110000110 39 1000011110 62 1110001001 40 1000100111 63 1110010001 41 1000101110 64 1110100001 42 1000111100 65 1110100010 43 1001000111 66 1110110000 44 1001111000 67 1111000010 45 1010000111 68 1111000100 46 1010001011 69 1111001000 47 1011000011 70 1111010000

。

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