CN2066977U - Float-type code band level meter - Google Patents
Float-type code band level meter Download PDFInfo
- Publication number
- CN2066977U CN2066977U CN 89216552 CN89216552U CN2066977U CN 2066977 U CN2066977 U CN 2066977U CN 89216552 CN89216552 CN 89216552 CN 89216552 U CN89216552 U CN 89216552U CN 2066977 U CN2066977 U CN 2066977U
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- float
- detection head
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- signal detection
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Abstract
In the testing and driving device of a liquid level meter, a flexible encode strip moves according to a certain ratio following the lifting of a float-type liquid level sensor and can give a fixed encode corresponding to the lifting position of the float-type liquid level sensor at any position. The encode signal is detected by a signal detection head and converted by a detect circuit, and the height of the liquid level with five-digit number is displayed by a displayer.
Description
The utility model belongs to measurement instrument, is used for the liquid level of detection receptacle inside.
The utility model that CN85203066 proposes, 3 weak points are arranged: first, because the main element of surveying is a steel sign indicating number band with the float synchronization lifting, be the ratio i=1:1 of the two displacement, this detects zero liquid level gauge to tens of meters wide ranges for needs, increase that can invar sign indicating number strip length and the expansion that causes making code error; Second, because it belongs to reflective signal detection head photoelectric camera phase device that adopts or optical fiber detecting device, be about to the same side that light-emitting component and photo detector place steel sign indicating number band, represent " 1 " and " 0 " two states of reflected code by the two kinds of different reflected light that coded graphics produced under the light and dark two states, therefore be subject to the influence that temperature and humidity changes, make photosignal receive interference; The 3rd, mint-mark the steel sign indicating number with on coded graphics, because of friction, oil vapour corrosion and factor such as aging, can occur fading or obscission, this also is one of key factor that produces the error code phenomenon.
The purpose of this utility model provides that a kind of stable performance, resolving power are good, information transmission and show the novel liquid level meter of five digit number automatically.
The purpose of this utility model realizes in the following manner:
In the detection gear train of liquid level gauge, by adopting the travelling block gear shift mode, a flexible coding band (comprising two types of photo-electric and contacts) is moved by certain ratio along with the lifting of float-type level sensing element, and the amount of movement of coding band and the ratio of float-type level sensing element straight-line displacement amount: i=1/ (2
n), n is the travelling block number.The coding band can provide one and float-type level sensing element lifting position respective coding (that is numerical code) at an arbitrary position when moving.Photo-electric coding band, it represents reflected code " 1 " and " 0 " two states with printing opacity and light tight two states; Contact coding band, it represents reflected code " 1 " and " 0 " two states with conducting with by two states.According to the encoding law of reflected code, on the coding band, make digit path, its coded signal as using photo-electric coding band, promptly adopts the transmission-type signal detection head mode that detects of (comprising two types of optical fiber and photoelectricity).Contact coding band then adopts the mode that detects of contact signal detection head, and detection signal processing of circuit after testing demonstrates liquid level by display instrument.
Fig. 1 is a fundamental diagram of the present utility model, it is mainly by the float-type level sensing element (1), steel belt (2), leading block (3), travelling block (4), coding band (5), leading block (6), steel belt (7), leading block (8) and the counterweight (9) that detect in the gear train, and sheath (10), guiding wire rope (11), transmission-type signal detection head (12) or contact signal detection head (13), instrument box (14), magnifier viewport (15) and nonadjustable signal (16) etc. composition partly.Float-type level sensing element (1) is along with liquid level change the time, driving coding band (5) by steel belt (2), leading block (3) and travelling block (4) moves by certain ratio, for example, when only adopting a travelling block (4) speed change, float-type level sensing element (1) to rise to 20 meters positions by zero-bit in detecting gear train, the amount of movement of coding band (5): L=20 1/ (2
n)=20 1/ (2
1)=10 meter.Coded signal above the coding band (5) adopts the detect mode of transmission-type signal detection head through (12) or contact signal detection head (13), and the coded message testing circuit is handled and demonstrated liquid level by display instrument.Operation field reading directly perceived matches with nonadjustable signal (16) on coding band (5) and with the corresponding number of division of coded signal by mint-mark, locates intuitively to read liquid level by magnifier viewport (15).
For overcoming the force unbalance phenomenon that float-type level sensing element (1) causes because of the variation of lifting position, steel belt (2) should become certain ratio with (7) unit weight with coding band (5) unit weight, the size of ratio is by determining by calculating detecting the gear train force analysis.
Counterweight (9) is to be used for guaranteeing to detect each equilibrium of forces of gear train.
Fig. 2 is the constant force spring device that can replace counterweight (9) function, and it mainly claims constant force spring, disc spring wheel (19) and major parts such as (20) to form again by sign indicating number band folding and unfolding wheel (17), disc spring (18).When float-type level sensing element (1) rose, the tension force of coding band (5) reduced, relaxes, and makes system be subjected to force unbalance, and disc spring (18) is done corresponding rolling, made (5) tensioning of coding band, made system's balance again; When float-type level sensing element (1) descended, the tension force of coding band (5) increased, and makes system be subjected to force unbalance, disc spring (18) warp at this moment, and reach the balance again of power.
The transmission-type signal detection head (12) that the utility model proposes, it comprises " transmission-type fiber-optic signal detection head " and " transmission-type photosignal detection head " two types by its version.
Fig. 3 is the functional-block diagram of a kind of " transmission-type fiber-optic signal detection head ".(21) are that optical fiber combination machine, (24) are photo-electric coding band for transmission fibre bundle, (22) for reception fibre bundle, (23) among the figure.Sending the transmission termination (A) of fibre bundle (21) and the reception termination (B) of reception fibre bundle (22) places the photo-electric coding to be with the both sides of (24) light hole, also to carry out assembled arrangement by certain array configuration at optical fiber combination machine (23) respectively.The light of light source S emission is through sending fibre bundle (21) to sending termination (A), light beam passes the light hole of photo-electric coding band (24) to the reception termination (B) that receives fibre bundle (22), the photelectric receiver G that transfers to through receiving fibre bundle (22) changes into electric signal, handle by testing circuit, demonstrate liquid level by display instrument.
The difference of " transmission-type photosignal detection head " and " transmission-type fiber-optic signal detection head ", just be that light signal no longer passes through fibre-optic transmission, but directly the light-emitting component in the signal detection head and photo detector placed the both sides of photo-electric coding band (24) light hole.
Fig. 4 is the functional-block diagram of a kind of " contact signal detection head ".(13) are the contact signal detection head among the figure, and mainly by being with corresponding several control brushes of digit path (26) (27) above (25) to combine with the contact coding, it is directly coded signal to be transmitted straight testing circuit with electrical signal form for it.
Claims (4)
1, a kind of float-type sign indicating number band liquid level gauge, it is mainly by float-type level sensing element, steel belt, leading block, the coding band, counterweight or constant force spring device, be equipped with certain testing circuit compositions such as (or light path and testing circuits) again, its coding band is to move by certain ratio along with the lifting of float, and can provide one and float-type level sensing element lifting position respective coding at an arbitrary position, coded signal is detected by signal detection head, processing of circuit after testing, demonstrate liquid level by display instrument, it is characterized in that: 1. in detecting gear train, adopt the travelling block speed change, coding band (5) is moved by certain ratio along with the lifting of float-type level sensing element (1); 2. coding band (5) it comprise that photo-electric coding band (24) and contact coding be with (25) two kinds of structures, be shaped on the digit path of reflected code in the above, and mint-mark has and the corresponding number of division of coded signal; 3. adopt transmission-type signal detection head (12) or contact signal detection head (13) that the coded signal above the coding band (5) is detected.
2, liquid level gauge according to claim 1 is characterized in that the amount of movement and float-type level sensing element (1) straight-line displacement amount ratio i=1/ (2n) of coding band (5).
3, liquid level gauge according to claim 1 is characterized in that contact signal detection head (13), and it is by forming with corresponding several control brushes of contact digit path.
4, liquid level gauge according to claim 1, it comprises that transmission-type fiber-optic signal detection head and transmission-type photosignal detect first two structure to it is characterized in that transmission-type signal detection head (12), " send termination (A) " of the transmission fibre bundle (21) in the transmission-type fiber-optic signal detection head and " receiving termination (B) " of receiving fibre bundle (22) are the both sides that place the photo-electric coding to be with (24) light hole respectively, and in optical fiber combination machine (23) assembled arrangement; Transmission-type photosignal detection head is made up of the light-emitting component and the photo detector that place photo-electric coding band (24) light hole both sides respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89216552 CN2066977U (en) | 1989-09-15 | 1989-09-15 | Float-type code band level meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89216552 CN2066977U (en) | 1989-09-15 | 1989-09-15 | Float-type code band level meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2066977U true CN2066977U (en) | 1990-12-05 |
Family
ID=4871983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89216552 Expired - Lifetime CN2066977U (en) | 1989-09-15 | 1989-09-15 | Float-type code band level meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2066977U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109315309A (en) * | 2018-11-20 | 2019-02-12 | 葛永琴 | A kind of drinking trough can be used for livestock farm |
-
1989
- 1989-09-15 CN CN 89216552 patent/CN2066977U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109315309A (en) * | 2018-11-20 | 2019-02-12 | 葛永琴 | A kind of drinking trough can be used for livestock farm |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE ADDRESS; FROM: NO. 6, UNIT 1, HOUSE 12, NO. 22, XIJIAOTAIPING ROAD, BEIJING CITY TO: NO. 4, UNIT 1, HOUSE 18, NO. 22, XIJIAOTAIPING ROAD, BEIJING CITY |
|
| CP03 | Change of name, title or address |
Address after: No. 18, building 1, No. 4, Taiping Road, 22 west suburb, Beijing Patentee after: Gao Xiuzhen Address before: No. 12, building 1, No. 6, Taiping Road, 22 west suburb, Beijing Patentee before: Gao Xiuzhen |
|
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C53 | Correction of patent for invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: CO-PATENTEE TO: YIN BAOQUAN |
|
| CP01 | Change in the name or title of a patent holder |
Co-patentee after: Yin Baoquan |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |